diff options
Diffstat (limited to 'drivers/extcon')
24 files changed, 12618 insertions, 0 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig new file mode 100644 index 000000000..de15bf558 --- /dev/null +++ b/drivers/extcon/Kconfig @@ -0,0 +1,161 @@ +menuconfig EXTCON + tristate "External Connector Class (extcon) support" + help + Say Y here to enable external connector class (extcon) support. + This allows monitoring external connectors by userspace + via sysfs and uevent and supports external connectors with + multiple states; i.e., an extcon that may have multiple + cables attached. For example, an external connector of a device + may be used to connect an HDMI cable and a AC adaptor, and to + host USB ports. Many of 30-pin connectors including PDMI are + also good examples. + +if EXTCON + +comment "Extcon Device Drivers" + +config EXTCON_ADC_JACK + tristate "ADC Jack extcon support" + depends on IIO + help + Say Y here to enable extcon device driver based on ADC values. + +config EXTCON_ARIZONA + tristate "Wolfson Arizona EXTCON support" + depends on MFD_ARIZONA && INPUT && SND_SOC + help + Say Y here to enable support for external accessory detection + with Wolfson Arizona devices. These are audio CODECs with + advanced audio accessory detection support. + +config EXTCON_AXP288 + tristate "X-Power AXP288 EXTCON support" + depends on MFD_AXP20X && USB_SUPPORT && X86 + select USB_ROLE_SWITCH + help + Say Y here to enable support for USB peripheral detection + and USB MUX switching by X-Power AXP288 PMIC. + +config EXTCON_GPIO + tristate "GPIO extcon support" + depends on GPIOLIB || COMPILE_TEST + help + Say Y here to enable GPIO based extcon support. Note that GPIO + extcon supports single state per extcon instance. + +config EXTCON_INTEL_INT3496 + tristate "Intel INT3496 ACPI device extcon driver" + depends on GPIOLIB && ACPI && (X86 || COMPILE_TEST) + help + Say Y here to enable extcon support for USB OTG ports controlled by + an Intel INT3496 ACPI device. + + This ACPI device is typically found on Intel Baytrail or Cherrytrail + based tablets, or other Baytrail / Cherrytrail devices. + +config EXTCON_INTEL_CHT_WC + tristate "Intel Cherrytrail Whiskey Cove PMIC extcon driver" + depends on INTEL_SOC_PMIC_CHTWC + help + Say Y here to enable extcon support for charger detection / control + on the Intel Cherrytrail Whiskey Cove PMIC. + +config EXTCON_MAX14577 + tristate "Maxim MAX14577/77836 EXTCON Support" + depends on MFD_MAX14577 + select IRQ_DOMAIN + select REGMAP_I2C + help + If you say yes here you get support for the MUIC device of + Maxim MAX14577/77836. The MAX14577/77836 MUIC is a USB port accessory + detector and switch. + +config EXTCON_MAX3355 + tristate "Maxim MAX3355 USB OTG EXTCON Support" + depends on GPIOLIB || COMPILE_TEST + help + If you say yes here you get support for the USB OTG role detection by + MAX3355. The MAX3355 chip integrates a charge pump and comparators to + enable a system with an integrated USB OTG dual-role transceiver to + function as an USB OTG dual-role device. + +config EXTCON_MAX77693 + tristate "Maxim MAX77693 EXTCON Support" + depends on MFD_MAX77693 && INPUT + select IRQ_DOMAIN + select REGMAP_I2C + help + If you say yes here you get support for the MUIC device of + Maxim MAX77693 PMIC. The MAX77693 MUIC is a USB port accessory + detector and switch. + +config EXTCON_MAX77843 + tristate "Maxim MAX77843 EXTCON Support" + depends on MFD_MAX77843 + select IRQ_DOMAIN + select REGMAP_I2C + help + If you say yes here you get support for the MUIC device of + Maxim MAX77843. The MAX77843 MUIC is a USB port accessory + detector add switch. + +config EXTCON_MAX8997 + tristate "Maxim MAX8997 EXTCON Support" + depends on MFD_MAX8997 && IRQ_DOMAIN + help + If you say yes here you get support for the MUIC device of + Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory + detector and switch. + +config EXTCON_PALMAS + tristate "Palmas USB EXTCON support" + depends on MFD_PALMAS + help + Say Y here to enable support for USB peripheral and USB host + detection by palmas usb. + +config EXTCON_QCOM_SPMI_MISC + tristate "Qualcomm USB extcon support" + depends on ARCH_QCOM || COMPILE_TEST + help + Say Y here to enable SPMI PMIC based USB cable detection + support on Qualcomm PMICs such as PM8941. + +config EXTCON_RT8973A + tristate "Richtek RT8973A EXTCON support" + depends on I2C + select IRQ_DOMAIN + select REGMAP_I2C + select REGMAP_IRQ + help + If you say yes here you get support for the MUIC device of + Richtek RT8973A. The RT8973A is a USB port accessory detector + and switch that is optimized to protect low voltage system + from abnormal high input voltage (up to 28V). + +config EXTCON_SM5502 + tristate "Silicon Mitus SM5502 EXTCON support" + depends on I2C + select IRQ_DOMAIN + select REGMAP_I2C + select REGMAP_IRQ + help + If you say yes here you get support for the MUIC device of + Silicon Mitus SM5502. The SM5502 is a USB port accessory + detector and switch. + +config EXTCON_USB_GPIO + tristate "USB GPIO extcon support" + depends on GPIOLIB || COMPILE_TEST + help + Say Y here to enable GPIO based USB cable detection extcon support. + Used typically if GPIO is used for USB ID pin detection. + +config EXTCON_USBC_CROS_EC + tristate "ChromeOS Embedded Controller EXTCON support" + depends on MFD_CROS_EC + help + Say Y here to enable USB Type C cable detection extcon support when + using Chrome OS EC based USB Type-C ports. + +endif diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile new file mode 100644 index 000000000..0888fdede --- /dev/null +++ b/drivers/extcon/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Makefile for external connector class (extcon) devices +# + +obj-$(CONFIG_EXTCON) += extcon-core.o +extcon-core-objs += extcon.o devres.o +obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o +obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o +obj-$(CONFIG_EXTCON_AXP288) += extcon-axp288.o +obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o +obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o +obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o +obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o +obj-$(CONFIG_EXTCON_MAX3355) += extcon-max3355.o +obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o +obj-$(CONFIG_EXTCON_MAX77843) += extcon-max77843.o +obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o +obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o +obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) += extcon-qcom-spmi-misc.o +obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o +obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o +obj-$(CONFIG_EXTCON_USB_GPIO) += extcon-usb-gpio.o +obj-$(CONFIG_EXTCON_USBC_CROS_EC) += extcon-usbc-cros-ec.o diff --git a/drivers/extcon/devres.c b/drivers/extcon/devres.c new file mode 100644 index 000000000..f599aeddf --- /dev/null +++ b/drivers/extcon/devres.c @@ -0,0 +1,275 @@ +/* + * drivers/extcon/devres.c - EXTCON device's resource management + * + * Copyright (C) 2016 Samsung Electronics + * Author: Chanwoo Choi <cw00.choi@samsung.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "extcon.h" + +static int devm_extcon_dev_match(struct device *dev, void *res, void *data) +{ + struct extcon_dev **r = res; + + if (WARN_ON(!r || !*r)) + return 0; + + return *r == data; +} + +static void devm_extcon_dev_release(struct device *dev, void *res) +{ + extcon_dev_free(*(struct extcon_dev **)res); +} + + +static void devm_extcon_dev_unreg(struct device *dev, void *res) +{ + extcon_dev_unregister(*(struct extcon_dev **)res); +} + +struct extcon_dev_notifier_devres { + struct extcon_dev *edev; + unsigned int id; + struct notifier_block *nb; +}; + +static void devm_extcon_dev_notifier_unreg(struct device *dev, void *res) +{ + struct extcon_dev_notifier_devres *this = res; + + extcon_unregister_notifier(this->edev, this->id, this->nb); +} + +static void devm_extcon_dev_notifier_all_unreg(struct device *dev, void *res) +{ + struct extcon_dev_notifier_devres *this = res; + + extcon_unregister_notifier_all(this->edev, this->nb); +} + +/** + * devm_extcon_dev_allocate - Allocate managed extcon device + * @dev: the device owning the extcon device being created + * @supported_cable: the array of the supported external connectors + * ending with EXTCON_NONE. + * + * This function manages automatically the memory of extcon device using device + * resource management and simplify the control of freeing the memory of extcon + * device. + * + * Returns the pointer memory of allocated extcon_dev if success + * or ERR_PTR(err) if fail + */ +struct extcon_dev *devm_extcon_dev_allocate(struct device *dev, + const unsigned int *supported_cable) +{ + struct extcon_dev **ptr, *edev; + + ptr = devres_alloc(devm_extcon_dev_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + edev = extcon_dev_allocate(supported_cable); + if (IS_ERR(edev)) { + devres_free(ptr); + return edev; + } + + edev->dev.parent = dev; + + *ptr = edev; + devres_add(dev, ptr); + + return edev; +} +EXPORT_SYMBOL_GPL(devm_extcon_dev_allocate); + +/** + * devm_extcon_dev_free() - Resource-managed extcon_dev_unregister() + * @dev: the device owning the extcon device being created + * @edev: the extcon device to be freed + * + * Free the memory that is allocated with devm_extcon_dev_allocate() + * function. + */ +void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev) +{ + WARN_ON(devres_release(dev, devm_extcon_dev_release, + devm_extcon_dev_match, edev)); +} +EXPORT_SYMBOL_GPL(devm_extcon_dev_free); + +/** + * devm_extcon_dev_register() - Resource-managed extcon_dev_register() + * @dev: the device owning the extcon device being created + * @edev: the extcon device to be registered + * + * this function, that extcon device is automatically unregistered on driver + * detach. Internally this function calls extcon_dev_register() function. + * To get more information, refer that function. + * + * If extcon device is registered with this function and the device needs to be + * unregistered separately, devm_extcon_dev_unregister() should be used. + * + * Returns 0 if success or negaive error number if failure. + */ +int devm_extcon_dev_register(struct device *dev, struct extcon_dev *edev) +{ + struct extcon_dev **ptr; + int ret; + + ptr = devres_alloc(devm_extcon_dev_unreg, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = extcon_dev_register(edev); + if (ret) { + devres_free(ptr); + return ret; + } + + *ptr = edev; + devres_add(dev, ptr); + + return 0; +} +EXPORT_SYMBOL_GPL(devm_extcon_dev_register); + +/** + * devm_extcon_dev_unregister() - Resource-managed extcon_dev_unregister() + * @dev: the device owning the extcon device being created + * @edev: the extcon device to unregistered + * + * Unregister extcon device that is registered with devm_extcon_dev_register() + * function. + */ +void devm_extcon_dev_unregister(struct device *dev, struct extcon_dev *edev) +{ + WARN_ON(devres_release(dev, devm_extcon_dev_unreg, + devm_extcon_dev_match, edev)); +} +EXPORT_SYMBOL_GPL(devm_extcon_dev_unregister); + +/** + * devm_extcon_register_notifier() - Resource-managed extcon_register_notifier() + * @dev: the device owning the extcon device being created + * @edev: the extcon device + * @id: the unique id among the extcon enumeration + * @nb: a notifier block to be registered + * + * This function manages automatically the notifier of extcon device using + * device resource management and simplify the control of unregistering + * the notifier of extcon device. + * + * Note that the second parameter given to the callback of nb (val) is + * "old_state", not the current state. The current state can be retrieved + * by looking at the third pameter (edev pointer)'s state value. + * + * Returns 0 if success or negaive error number if failure. + */ +int devm_extcon_register_notifier(struct device *dev, struct extcon_dev *edev, + unsigned int id, struct notifier_block *nb) +{ + struct extcon_dev_notifier_devres *ptr; + int ret; + + ptr = devres_alloc(devm_extcon_dev_notifier_unreg, sizeof(*ptr), + GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = extcon_register_notifier(edev, id, nb); + if (ret) { + devres_free(ptr); + return ret; + } + + ptr->edev = edev; + ptr->id = id; + ptr->nb = nb; + devres_add(dev, ptr); + + return 0; +} +EXPORT_SYMBOL(devm_extcon_register_notifier); + +/** + * devm_extcon_unregister_notifier() + - Resource-managed extcon_unregister_notifier() + * @dev: the device owning the extcon device being created + * @edev: the extcon device + * @id: the unique id among the extcon enumeration + * @nb: a notifier block to be registered + */ +void devm_extcon_unregister_notifier(struct device *dev, + struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb) +{ + WARN_ON(devres_release(dev, devm_extcon_dev_notifier_unreg, + devm_extcon_dev_match, edev)); +} +EXPORT_SYMBOL(devm_extcon_unregister_notifier); + +/** + * devm_extcon_register_notifier_all() + * - Resource-managed extcon_register_notifier_all() + * @dev: the device owning the extcon device being created + * @edev: the extcon device + * @nb: a notifier block to be registered + * + * This function manages automatically the notifier of extcon device using + * device resource management and simplify the control of unregistering + * the notifier of extcon device. To get more information, refer that function. + * + * Returns 0 if success or negaive error number if failure. + */ +int devm_extcon_register_notifier_all(struct device *dev, struct extcon_dev *edev, + struct notifier_block *nb) +{ + struct extcon_dev_notifier_devres *ptr; + int ret; + + ptr = devres_alloc(devm_extcon_dev_notifier_all_unreg, sizeof(*ptr), + GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = extcon_register_notifier_all(edev, nb); + if (ret) { + devres_free(ptr); + return ret; + } + + ptr->edev = edev; + ptr->nb = nb; + devres_add(dev, ptr); + + return 0; +} +EXPORT_SYMBOL(devm_extcon_register_notifier_all); + +/** + * devm_extcon_unregister_notifier_all() + * - Resource-managed extcon_unregister_notifier_all() + * @dev: the device owning the extcon device being created + * @edev: the extcon device + * @nb: a notifier block to be registered + */ +void devm_extcon_unregister_notifier_all(struct device *dev, + struct extcon_dev *edev, + struct notifier_block *nb) +{ + WARN_ON(devres_release(dev, devm_extcon_dev_notifier_all_unreg, + devm_extcon_dev_match, edev)); +} +EXPORT_SYMBOL(devm_extcon_unregister_notifier_all); diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c new file mode 100644 index 000000000..b1fb38b7f --- /dev/null +++ b/drivers/extcon/extcon-adc-jack.c @@ -0,0 +1,216 @@ +/* + * drivers/extcon/extcon-adc-jack.c + * + * Analog Jack extcon driver with ADC-based detection capability. + * + * Copyright (C) 2016 Samsung Electronics + * Chanwoo Choi <cw00.choi@samsung.com> + * + * Copyright (C) 2012 Samsung Electronics + * MyungJoo Ham <myungjoo.ham@samsung.com> + * + * Modified for calling to IIO to get adc by <anish.singh@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/workqueue.h> +#include <linux/iio/consumer.h> +#include <linux/extcon/extcon-adc-jack.h> +#include <linux/extcon-provider.h> + +/** + * struct adc_jack_data - internal data for adc_jack device driver + * @edev: extcon device. + * @cable_names: list of supported cables. + * @adc_conditions: list of adc value conditions. + * @num_conditions: size of adc_conditions. + * @irq: irq number of attach/detach event (0 if not exist). + * @handling_delay: interrupt handler will schedule extcon event + * handling at handling_delay jiffies. + * @handler: extcon event handler called by interrupt handler. + * @chan: iio channel being queried. + */ +struct adc_jack_data { + struct device *dev; + struct extcon_dev *edev; + + const unsigned int **cable_names; + struct adc_jack_cond *adc_conditions; + int num_conditions; + + int irq; + unsigned long handling_delay; /* in jiffies */ + struct delayed_work handler; + + struct iio_channel *chan; + bool wakeup_source; +}; + +static void adc_jack_handler(struct work_struct *work) +{ + struct adc_jack_data *data = container_of(to_delayed_work(work), + struct adc_jack_data, + handler); + struct adc_jack_cond *def; + int ret, adc_val; + int i; + + ret = iio_read_channel_raw(data->chan, &adc_val); + if (ret < 0) { + dev_err(data->dev, "read channel() error: %d\n", ret); + return; + } + + /* Get state from adc value with adc_conditions */ + for (i = 0; i < data->num_conditions; i++) { + def = &data->adc_conditions[i]; + if (def->min_adc <= adc_val && def->max_adc >= adc_val) { + extcon_set_state_sync(data->edev, def->id, true); + return; + } + } + + /* Set the detached state if adc value is not included in the range */ + for (i = 0; i < data->num_conditions; i++) { + def = &data->adc_conditions[i]; + extcon_set_state_sync(data->edev, def->id, false); + } +} + +static irqreturn_t adc_jack_irq_thread(int irq, void *_data) +{ + struct adc_jack_data *data = _data; + + queue_delayed_work(system_power_efficient_wq, + &data->handler, data->handling_delay); + return IRQ_HANDLED; +} + +static int adc_jack_probe(struct platform_device *pdev) +{ + struct adc_jack_data *data; + struct adc_jack_pdata *pdata = dev_get_platdata(&pdev->dev); + int i, err = 0; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + if (!pdata->cable_names) { + dev_err(&pdev->dev, "error: cable_names not defined.\n"); + return -EINVAL; + } + + data->dev = &pdev->dev; + data->edev = devm_extcon_dev_allocate(&pdev->dev, pdata->cable_names); + if (IS_ERR(data->edev)) { + dev_err(&pdev->dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + if (!pdata->adc_conditions) { + dev_err(&pdev->dev, "error: adc_conditions not defined.\n"); + return -EINVAL; + } + data->adc_conditions = pdata->adc_conditions; + + /* Check the length of array and set num_conditions */ + for (i = 0; data->adc_conditions[i].id != EXTCON_NONE; i++); + data->num_conditions = i; + + data->chan = devm_iio_channel_get(&pdev->dev, pdata->consumer_channel); + if (IS_ERR(data->chan)) + return PTR_ERR(data->chan); + + data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms); + data->wakeup_source = pdata->wakeup_source; + + INIT_DEFERRABLE_WORK(&data->handler, adc_jack_handler); + + platform_set_drvdata(pdev, data); + + err = devm_extcon_dev_register(&pdev->dev, data->edev); + if (err) + return err; + + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) { + dev_err(&pdev->dev, "platform_get_irq failed\n"); + return -ENODEV; + } + + err = request_any_context_irq(data->irq, adc_jack_irq_thread, + pdata->irq_flags, pdata->name, data); + + if (err < 0) { + dev_err(&pdev->dev, "error: irq %d\n", data->irq); + return err; + } + + if (data->wakeup_source) + device_init_wakeup(&pdev->dev, 1); + + adc_jack_handler(&data->handler.work); + return 0; +} + +static int adc_jack_remove(struct platform_device *pdev) +{ + struct adc_jack_data *data = platform_get_drvdata(pdev); + + free_irq(data->irq, data); + cancel_work_sync(&data->handler.work); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int adc_jack_suspend(struct device *dev) +{ + struct adc_jack_data *data = dev_get_drvdata(dev); + + cancel_delayed_work_sync(&data->handler); + if (device_may_wakeup(data->dev)) + enable_irq_wake(data->irq); + + return 0; +} + +static int adc_jack_resume(struct device *dev) +{ + struct adc_jack_data *data = dev_get_drvdata(dev); + + if (device_may_wakeup(data->dev)) + disable_irq_wake(data->irq); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(adc_jack_pm_ops, + adc_jack_suspend, adc_jack_resume); + +static struct platform_driver adc_jack_driver = { + .probe = adc_jack_probe, + .remove = adc_jack_remove, + .driver = { + .name = "adc-jack", + .pm = &adc_jack_pm_ops, + }, +}; + +module_platform_driver(adc_jack_driver); + +MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); +MODULE_DESCRIPTION("ADC Jack extcon driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c new file mode 100644 index 000000000..c857120c0 --- /dev/null +++ b/drivers/extcon/extcon-arizona.c @@ -0,0 +1,1784 @@ +/* + * extcon-arizona.c - Extcon driver Wolfson Arizona devices + * + * Copyright (C) 2012-2014 Wolfson Microelectronics plc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/gpio.h> +#include <linux/input.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/extcon-provider.h> + +#include <sound/soc.h> + +#include <linux/mfd/arizona/core.h> +#include <linux/mfd/arizona/pdata.h> +#include <linux/mfd/arizona/registers.h> +#include <dt-bindings/mfd/arizona.h> + +#define ARIZONA_MAX_MICD_RANGE 8 + +#define ARIZONA_MICD_CLAMP_MODE_JDL 0x4 +#define ARIZONA_MICD_CLAMP_MODE_JDH 0x5 +#define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9 +#define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb + +#define ARIZONA_TST_CAP_DEFAULT 0x3 +#define ARIZONA_TST_CAP_CLAMP 0x1 + +#define ARIZONA_HPDET_MAX 10000 + +#define HPDET_DEBOUNCE 500 +#define DEFAULT_MICD_TIMEOUT 2000 + +#define ARIZONA_HPDET_WAIT_COUNT 15 +#define ARIZONA_HPDET_WAIT_DELAY_MS 20 + +#define QUICK_HEADPHONE_MAX_OHM 3 +#define MICROPHONE_MIN_OHM 1257 +#define MICROPHONE_MAX_OHM 30000 + +#define MICD_DBTIME_TWO_READINGS 2 +#define MICD_DBTIME_FOUR_READINGS 4 + +#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \ + ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \ + ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \ + ARIZONA_MICD_LVL_7) + +#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7) + +#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8) + +struct arizona_extcon_info { + struct device *dev; + struct arizona *arizona; + struct mutex lock; + struct regulator *micvdd; + struct input_dev *input; + + u16 last_jackdet; + + int micd_mode; + const struct arizona_micd_config *micd_modes; + int micd_num_modes; + + const struct arizona_micd_range *micd_ranges; + int num_micd_ranges; + + int micd_timeout; + + bool micd_reva; + bool micd_clamp; + + struct delayed_work hpdet_work; + struct delayed_work micd_detect_work; + struct delayed_work micd_timeout_work; + + bool hpdet_active; + bool hpdet_done; + bool hpdet_retried; + + int num_hpdet_res; + unsigned int hpdet_res[3]; + + bool mic; + bool detecting; + int jack_flips; + + int hpdet_ip_version; + + struct extcon_dev *edev; + + struct gpio_desc *micd_pol_gpio; +}; + +static const struct arizona_micd_config micd_default_modes[] = { + { ARIZONA_ACCDET_SRC, 1, 0 }, + { 0, 2, 1 }, +}; + +static const struct arizona_micd_range micd_default_ranges[] = { + { .max = 11, .key = BTN_0 }, + { .max = 28, .key = BTN_1 }, + { .max = 54, .key = BTN_2 }, + { .max = 100, .key = BTN_3 }, + { .max = 186, .key = BTN_4 }, + { .max = 430, .key = BTN_5 }, +}; + +/* The number of levels in arizona_micd_levels valid for button thresholds */ +#define ARIZONA_NUM_MICD_BUTTON_LEVELS 64 + +static const int arizona_micd_levels[] = { + 3, 6, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 34, 36, 39, 41, 44, 46, + 49, 52, 54, 57, 60, 62, 65, 67, 70, 73, 75, 78, 81, 83, 89, 94, 100, + 105, 111, 116, 122, 127, 139, 150, 161, 173, 186, 196, 209, 220, 245, + 270, 295, 321, 348, 375, 402, 430, 489, 550, 614, 681, 752, 903, 1071, + 1257, 30000, +}; + +static const unsigned int arizona_cable[] = { + EXTCON_MECHANICAL, + EXTCON_JACK_MICROPHONE, + EXTCON_JACK_HEADPHONE, + EXTCON_JACK_LINE_OUT, + EXTCON_NONE, +}; + +static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info); + +static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info, + bool clamp) +{ + struct arizona *arizona = info->arizona; + unsigned int mask = 0, val = 0; + unsigned int cap_sel = 0; + int ret; + + switch (arizona->type) { + case WM8998: + case WM1814: + mask = 0; + break; + case WM5110: + case WM8280: + mask = ARIZONA_HP1L_SHRTO | ARIZONA_HP1L_FLWR | + ARIZONA_HP1L_SHRTI; + if (clamp) { + val = ARIZONA_HP1L_SHRTO; + cap_sel = ARIZONA_TST_CAP_CLAMP; + } else { + val = ARIZONA_HP1L_FLWR | ARIZONA_HP1L_SHRTI; + cap_sel = ARIZONA_TST_CAP_DEFAULT; + } + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HP_TEST_CTRL_1, + ARIZONA_HP1_TST_CAP_SEL_MASK, + cap_sel); + if (ret != 0) + dev_warn(arizona->dev, + "Failed to set TST_CAP_SEL: %d\n", ret); + break; + default: + mask = ARIZONA_RMV_SHRT_HP1L; + if (clamp) + val = ARIZONA_RMV_SHRT_HP1L; + break; + } + + snd_soc_dapm_mutex_lock(arizona->dapm); + + arizona->hpdet_clamp = clamp; + + /* Keep the HP output stages disabled while doing the clamp */ + if (clamp) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_OUTPUT_ENABLES_1, + ARIZONA_OUT1L_ENA | + ARIZONA_OUT1R_ENA, 0); + if (ret != 0) + dev_warn(arizona->dev, + "Failed to disable headphone outputs: %d\n", + ret); + } + + if (mask) { + ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1L, + mask, val); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do clamp: %d\n", + ret); + + ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1R, + mask, val); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do clamp: %d\n", + ret); + } + + /* Restore the desired state while not doing the clamp */ + if (!clamp) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_OUTPUT_ENABLES_1, + ARIZONA_OUT1L_ENA | + ARIZONA_OUT1R_ENA, arizona->hp_ena); + if (ret != 0) + dev_warn(arizona->dev, + "Failed to restore headphone outputs: %d\n", + ret); + } + + snd_soc_dapm_mutex_unlock(arizona->dapm); +} + +static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode) +{ + struct arizona *arizona = info->arizona; + + mode %= info->micd_num_modes; + + gpiod_set_value_cansleep(info->micd_pol_gpio, + info->micd_modes[mode].gpio); + + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_BIAS_SRC_MASK, + info->micd_modes[mode].bias << + ARIZONA_MICD_BIAS_SRC_SHIFT); + regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_SRC, info->micd_modes[mode].src); + + info->micd_mode = mode; + + dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode); +} + +static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info) +{ + switch (info->micd_modes[0].bias) { + case 1: + return "MICBIAS1"; + case 2: + return "MICBIAS2"; + case 3: + return "MICBIAS3"; + default: + return "MICVDD"; + } +} + +static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + const char *widget = arizona_extcon_get_micbias(info); + struct snd_soc_dapm_context *dapm = arizona->dapm; + struct snd_soc_component *component = snd_soc_dapm_to_component(dapm); + int ret; + + ret = snd_soc_component_force_enable_pin(component, widget); + if (ret != 0) + dev_warn(arizona->dev, "Failed to enable %s: %d\n", + widget, ret); + + snd_soc_dapm_sync(dapm); + + if (!arizona->pdata.micd_force_micbias) { + ret = snd_soc_component_disable_pin(component, widget); + if (ret != 0) + dev_warn(arizona->dev, "Failed to disable %s: %d\n", + widget, ret); + + snd_soc_dapm_sync(dapm); + } +} + +static void arizona_start_mic(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + bool change; + int ret; + unsigned int mode; + + /* Microphone detection can't use idle mode */ + pm_runtime_get(info->dev); + + if (info->detecting) { + ret = regulator_allow_bypass(info->micvdd, false); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to regulate MICVDD: %d\n", + ret); + } + } + + ret = regulator_enable(info->micvdd); + if (ret != 0) { + dev_err(arizona->dev, "Failed to enable MICVDD: %d\n", + ret); + } + + if (info->micd_reva) { + regmap_write(arizona->regmap, 0x80, 0x3); + regmap_write(arizona->regmap, 0x294, 0); + regmap_write(arizona->regmap, 0x80, 0x0); + } + + if (info->detecting && arizona->pdata.micd_software_compare) + mode = ARIZONA_ACCDET_MODE_ADC; + else + mode = ARIZONA_ACCDET_MODE_MIC; + + regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK, mode); + + arizona_extcon_pulse_micbias(info); + + regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_ENA, ARIZONA_MICD_ENA, + &change); + if (!change) { + regulator_disable(info->micvdd); + pm_runtime_put_autosuspend(info->dev); + } +} + +static void arizona_stop_mic(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + const char *widget = arizona_extcon_get_micbias(info); + struct snd_soc_dapm_context *dapm = arizona->dapm; + struct snd_soc_component *component = snd_soc_dapm_to_component(dapm); + bool change; + int ret; + + regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_ENA, 0, + &change); + + ret = snd_soc_component_disable_pin(component, widget); + if (ret != 0) + dev_warn(arizona->dev, + "Failed to disable %s: %d\n", + widget, ret); + + snd_soc_dapm_sync(dapm); + + if (info->micd_reva) { + regmap_write(arizona->regmap, 0x80, 0x3); + regmap_write(arizona->regmap, 0x294, 2); + regmap_write(arizona->regmap, 0x80, 0x0); + } + + ret = regulator_allow_bypass(info->micvdd, true); + if (ret != 0) { + dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n", + ret); + } + + if (change) { + regulator_disable(info->micvdd); + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); + } +} + +static struct { + unsigned int threshold; + unsigned int factor_a; + unsigned int factor_b; +} arizona_hpdet_b_ranges[] = { + { 100, 5528, 362464 }, + { 169, 11084, 6186851 }, + { 169, 11065, 65460395 }, +}; + +#define ARIZONA_HPDET_B_RANGE_MAX 0x3fb + +static struct { + int min; + int max; +} arizona_hpdet_c_ranges[] = { + { 0, 30 }, + { 8, 100 }, + { 100, 1000 }, + { 1000, 10000 }, +}; + +static int arizona_hpdet_read(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + unsigned int val, range; + int ret; + + ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, &val); + if (ret != 0) { + dev_err(arizona->dev, "Failed to read HPDET status: %d\n", + ret); + return ret; + } + + switch (info->hpdet_ip_version) { + case 0: + if (!(val & ARIZONA_HP_DONE)) { + dev_err(arizona->dev, "HPDET did not complete: %x\n", + val); + return -EAGAIN; + } + + val &= ARIZONA_HP_LVL_MASK; + break; + + case 1: + if (!(val & ARIZONA_HP_DONE_B)) { + dev_err(arizona->dev, "HPDET did not complete: %x\n", + val); + return -EAGAIN; + } + + ret = regmap_read(arizona->regmap, ARIZONA_HP_DACVAL, &val); + if (ret != 0) { + dev_err(arizona->dev, "Failed to read HP value: %d\n", + ret); + return -EAGAIN; + } + + regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1, + &range); + range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK) + >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; + + if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 && + (val < arizona_hpdet_b_ranges[range].threshold || + val >= ARIZONA_HPDET_B_RANGE_MAX)) { + range++; + dev_dbg(arizona->dev, "Moving to HPDET range %d\n", + range); + regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_IMPEDANCE_RANGE_MASK, + range << + ARIZONA_HP_IMPEDANCE_RANGE_SHIFT); + return -EAGAIN; + } + + /* If we go out of range report top of range */ + if (val < arizona_hpdet_b_ranges[range].threshold || + val >= ARIZONA_HPDET_B_RANGE_MAX) { + dev_dbg(arizona->dev, "Measurement out of range\n"); + return ARIZONA_HPDET_MAX; + } + + dev_dbg(arizona->dev, "HPDET read %d in range %d\n", + val, range); + + val = arizona_hpdet_b_ranges[range].factor_b + / ((val * 100) - + arizona_hpdet_b_ranges[range].factor_a); + break; + + case 2: + if (!(val & ARIZONA_HP_DONE_B)) { + dev_err(arizona->dev, "HPDET did not complete: %x\n", + val); + return -EAGAIN; + } + + val &= ARIZONA_HP_LVL_B_MASK; + /* Convert to ohms, the value is in 0.5 ohm increments */ + val /= 2; + + regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1, + &range); + range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK) + >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; + + /* Skip up a range, or report? */ + if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 && + (val >= arizona_hpdet_c_ranges[range].max)) { + range++; + dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n", + arizona_hpdet_c_ranges[range].min, + arizona_hpdet_c_ranges[range].max); + regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_IMPEDANCE_RANGE_MASK, + range << + ARIZONA_HP_IMPEDANCE_RANGE_SHIFT); + return -EAGAIN; + } + + if (range && (val < arizona_hpdet_c_ranges[range].min)) { + dev_dbg(arizona->dev, "Reporting range boundary %d\n", + arizona_hpdet_c_ranges[range].min); + val = arizona_hpdet_c_ranges[range].min; + } + break; + + default: + dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n", + info->hpdet_ip_version); + return -EINVAL; + } + + dev_dbg(arizona->dev, "HP impedance %d ohms\n", val); + return val; +} + +static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading, + bool *mic) +{ + struct arizona *arizona = info->arizona; + int id_gpio = arizona->pdata.hpdet_id_gpio; + + /* + * If we're using HPDET for accessory identification we need + * to take multiple measurements, step through them in sequence. + */ + if (arizona->pdata.hpdet_acc_id) { + info->hpdet_res[info->num_hpdet_res++] = *reading; + + /* Only check the mic directly if we didn't already ID it */ + if (id_gpio && info->num_hpdet_res == 1) { + dev_dbg(arizona->dev, "Measuring mic\n"); + + regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK | + ARIZONA_ACCDET_SRC, + ARIZONA_ACCDET_MODE_HPR | + info->micd_modes[0].src); + + gpio_set_value_cansleep(id_gpio, 1); + + regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_POLL, ARIZONA_HP_POLL); + return -EAGAIN; + } + + /* OK, got both. Now, compare... */ + dev_dbg(arizona->dev, "HPDET measured %d %d\n", + info->hpdet_res[0], info->hpdet_res[1]); + + /* Take the headphone impedance for the main report */ + *reading = info->hpdet_res[0]; + + /* Sometimes we get false readings due to slow insert */ + if (*reading >= ARIZONA_HPDET_MAX && !info->hpdet_retried) { + dev_dbg(arizona->dev, "Retrying high impedance\n"); + info->num_hpdet_res = 0; + info->hpdet_retried = true; + arizona_start_hpdet_acc_id(info); + pm_runtime_put(info->dev); + return -EAGAIN; + } + + /* + * If we measure the mic as high impedance + */ + if (!id_gpio || info->hpdet_res[1] > 50) { + dev_dbg(arizona->dev, "Detected mic\n"); + *mic = true; + info->detecting = true; + } else { + dev_dbg(arizona->dev, "Detected headphone\n"); + } + + /* Make sure everything is reset back to the real polarity */ + regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_SRC, + info->micd_modes[0].src); + } + + return 0; +} + +static irqreturn_t arizona_hpdet_irq(int irq, void *data) +{ + struct arizona_extcon_info *info = data; + struct arizona *arizona = info->arizona; + int id_gpio = arizona->pdata.hpdet_id_gpio; + unsigned int report = EXTCON_JACK_HEADPHONE; + int ret, reading, state; + bool mic = false; + + mutex_lock(&info->lock); + + /* If we got a spurious IRQ for some reason then ignore it */ + if (!info->hpdet_active) { + dev_warn(arizona->dev, "Spurious HPDET IRQ\n"); + mutex_unlock(&info->lock); + return IRQ_NONE; + } + + /* If the cable was removed while measuring ignore the result */ + state = extcon_get_state(info->edev, EXTCON_MECHANICAL); + if (state < 0) { + dev_err(arizona->dev, "Failed to check cable state: %d\n", state); + goto out; + } else if (!state) { + dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n"); + goto done; + } + + ret = arizona_hpdet_read(info); + if (ret == -EAGAIN) + goto out; + else if (ret < 0) + goto done; + reading = ret; + + /* Reset back to starting range */ + regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL, + 0); + + ret = arizona_hpdet_do_id(info, &reading, &mic); + if (ret == -EAGAIN) + goto out; + else if (ret < 0) + goto done; + + /* Report high impedence cables as line outputs */ + if (reading >= 5000) + report = EXTCON_JACK_LINE_OUT; + else + report = EXTCON_JACK_HEADPHONE; + + ret = extcon_set_state_sync(info->edev, report, true); + if (ret != 0) + dev_err(arizona->dev, "Failed to report HP/line: %d\n", + ret); + +done: + /* Reset back to starting range */ + regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL, + 0); + + arizona_extcon_hp_clamp(info, false); + + if (id_gpio) + gpio_set_value_cansleep(id_gpio, 0); + + /* Revert back to MICDET mode */ + regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC); + + /* If we have a mic then reenable MICDET */ + if (state && (mic || info->mic)) + arizona_start_mic(info); + + if (info->hpdet_active) { + pm_runtime_put_autosuspend(info->dev); + info->hpdet_active = false; + } + + /* Do not set hp_det done when the cable has been unplugged */ + if (state) + info->hpdet_done = true; + +out: + mutex_unlock(&info->lock); + + return IRQ_HANDLED; +} + +static void arizona_identify_headphone(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + int ret; + + if (info->hpdet_done) + return; + + dev_dbg(arizona->dev, "Starting HPDET\n"); + + /* Make sure we keep the device enabled during the measurement */ + pm_runtime_get(info->dev); + + info->hpdet_active = true; + + if (info->mic) + arizona_stop_mic(info); + + arizona_extcon_hp_clamp(info, true); + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK, + arizona->pdata.hpdet_channel); + if (ret != 0) { + dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret); + goto err; + } + + ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_POLL, ARIZONA_HP_POLL); + if (ret != 0) { + dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n", + ret); + goto err; + } + + return; + +err: + regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC); + + /* Just report headphone */ + ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true); + if (ret != 0) + dev_err(arizona->dev, "Failed to report headphone: %d\n", ret); + + if (info->mic) + arizona_start_mic(info); + + info->hpdet_active = false; +} + +static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + int hp_reading = 32; + bool mic; + int ret; + + dev_dbg(arizona->dev, "Starting identification via HPDET\n"); + + /* Make sure we keep the device enabled during the measurement */ + pm_runtime_get_sync(info->dev); + + info->hpdet_active = true; + + arizona_extcon_hp_clamp(info, true); + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK, + info->micd_modes[0].src | + arizona->pdata.hpdet_channel); + if (ret != 0) { + dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret); + goto err; + } + + if (arizona->pdata.hpdet_acc_id_line) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_POLL, ARIZONA_HP_POLL); + if (ret != 0) { + dev_err(arizona->dev, + "Can't start HPDETL measurement: %d\n", + ret); + goto err; + } + } else { + arizona_hpdet_do_id(info, &hp_reading, &mic); + } + + return; + +err: + regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, + ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC); + + /* Just report headphone */ + ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true); + if (ret != 0) + dev_err(arizona->dev, "Failed to report headphone: %d\n", ret); + + info->hpdet_active = false; +} + +static void arizona_micd_timeout_work(struct work_struct *work) +{ + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + micd_timeout_work.work); + + mutex_lock(&info->lock); + + dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n"); + + info->detecting = false; + + arizona_identify_headphone(info); + + arizona_stop_mic(info); + + mutex_unlock(&info->lock); +} + +static void arizona_micd_detect(struct work_struct *work) +{ + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + micd_detect_work.work); + struct arizona *arizona = info->arizona; + unsigned int val = 0, lvl; + int ret, i, key; + + cancel_delayed_work_sync(&info->micd_timeout_work); + + mutex_lock(&info->lock); + + /* If the cable was removed while measuring ignore the result */ + ret = extcon_get_state(info->edev, EXTCON_MECHANICAL); + if (ret < 0) { + dev_err(arizona->dev, "Failed to check cable state: %d\n", + ret); + mutex_unlock(&info->lock); + return; + } else if (!ret) { + dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n"); + mutex_unlock(&info->lock); + return; + } + + if (info->detecting && arizona->pdata.micd_software_compare) { + /* Must disable MICD before we read the ADCVAL */ + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_ENA, 0); + ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_4, &val); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to read MICDET_ADCVAL: %d\n", + ret); + mutex_unlock(&info->lock); + return; + } + + dev_dbg(arizona->dev, "MICDET_ADCVAL: %x\n", val); + + val &= ARIZONA_MICDET_ADCVAL_MASK; + if (val < ARRAY_SIZE(arizona_micd_levels)) + val = arizona_micd_levels[val]; + else + val = INT_MAX; + + if (val <= QUICK_HEADPHONE_MAX_OHM) + val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_0; + else if (val <= MICROPHONE_MIN_OHM) + val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_1; + else if (val <= MICROPHONE_MAX_OHM) + val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_8; + else + val = ARIZONA_MICD_LVL_8; + } + + for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) { + ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to read MICDET: %d\n", ret); + mutex_unlock(&info->lock); + return; + } + + dev_dbg(arizona->dev, "MICDET: %x\n", val); + + if (!(val & ARIZONA_MICD_VALID)) { + dev_warn(arizona->dev, + "Microphone detection state invalid\n"); + mutex_unlock(&info->lock); + return; + } + } + + if (i == 10 && !(val & MICD_LVL_0_TO_8)) { + dev_err(arizona->dev, "Failed to get valid MICDET value\n"); + mutex_unlock(&info->lock); + return; + } + + /* Due to jack detect this should never happen */ + if (!(val & ARIZONA_MICD_STS)) { + dev_warn(arizona->dev, "Detected open circuit\n"); + info->mic = false; + arizona_stop_mic(info); + info->detecting = false; + arizona_identify_headphone(info); + goto handled; + } + + /* If we got a high impedence we should have a headset, report it. */ + if (info->detecting && (val & ARIZONA_MICD_LVL_8)) { + info->mic = true; + info->detecting = false; + + arizona_identify_headphone(info); + + ret = extcon_set_state_sync(info->edev, + EXTCON_JACK_MICROPHONE, true); + if (ret != 0) + dev_err(arizona->dev, "Headset report failed: %d\n", + ret); + + /* Don't need to regulate for button detection */ + ret = regulator_allow_bypass(info->micvdd, true); + if (ret != 0) { + dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n", + ret); + } + + goto handled; + } + + /* If we detected a lower impedence during initial startup + * then we probably have the wrong polarity, flip it. Don't + * do this for the lowest impedences to speed up detection of + * plain headphones. If both polarities report a low + * impedence then give up and report headphones. + */ + if (info->detecting && (val & MICD_LVL_1_TO_7)) { + if (info->jack_flips >= info->micd_num_modes * 10) { + dev_dbg(arizona->dev, "Detected HP/line\n"); + + info->detecting = false; + + arizona_identify_headphone(info); + + arizona_stop_mic(info); + } else { + info->micd_mode++; + if (info->micd_mode == info->micd_num_modes) + info->micd_mode = 0; + arizona_extcon_set_mode(info, info->micd_mode); + + info->jack_flips++; + } + + goto handled; + } + + /* + * If we're still detecting and we detect a short then we've + * got a headphone. Otherwise it's a button press. + */ + if (val & MICD_LVL_0_TO_7) { + if (info->mic) { + dev_dbg(arizona->dev, "Mic button detected\n"); + + lvl = val & ARIZONA_MICD_LVL_MASK; + lvl >>= ARIZONA_MICD_LVL_SHIFT; + + for (i = 0; i < info->num_micd_ranges; i++) + input_report_key(info->input, + info->micd_ranges[i].key, 0); + + WARN_ON(!lvl); + WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges); + if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) { + key = info->micd_ranges[ffs(lvl) - 1].key; + input_report_key(info->input, key, 1); + input_sync(info->input); + } + + } else if (info->detecting) { + dev_dbg(arizona->dev, "Headphone detected\n"); + info->detecting = false; + arizona_stop_mic(info); + + arizona_identify_headphone(info); + } else { + dev_warn(arizona->dev, "Button with no mic: %x\n", + val); + } + } else { + dev_dbg(arizona->dev, "Mic button released\n"); + for (i = 0; i < info->num_micd_ranges; i++) + input_report_key(info->input, + info->micd_ranges[i].key, 0); + input_sync(info->input); + arizona_extcon_pulse_micbias(info); + } + +handled: + if (info->detecting) { + if (arizona->pdata.micd_software_compare) + regmap_update_bits(arizona->regmap, + ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_ENA, + ARIZONA_MICD_ENA); + + queue_delayed_work(system_power_efficient_wq, + &info->micd_timeout_work, + msecs_to_jiffies(info->micd_timeout)); + } + + pm_runtime_mark_last_busy(info->dev); + mutex_unlock(&info->lock); +} + +static irqreturn_t arizona_micdet(int irq, void *data) +{ + struct arizona_extcon_info *info = data; + struct arizona *arizona = info->arizona; + int debounce = arizona->pdata.micd_detect_debounce; + + cancel_delayed_work_sync(&info->micd_detect_work); + cancel_delayed_work_sync(&info->micd_timeout_work); + + mutex_lock(&info->lock); + if (!info->detecting) + debounce = 0; + mutex_unlock(&info->lock); + + if (debounce) + queue_delayed_work(system_power_efficient_wq, + &info->micd_detect_work, + msecs_to_jiffies(debounce)); + else + arizona_micd_detect(&info->micd_detect_work.work); + + return IRQ_HANDLED; +} + +static void arizona_hpdet_work(struct work_struct *work) +{ + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + hpdet_work.work); + + mutex_lock(&info->lock); + arizona_start_hpdet_acc_id(info); + mutex_unlock(&info->lock); +} + +static int arizona_hpdet_wait(struct arizona_extcon_info *info) +{ + struct arizona *arizona = info->arizona; + unsigned int val; + int i, ret; + + for (i = 0; i < ARIZONA_HPDET_WAIT_COUNT; i++) { + ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, + &val); + if (ret) { + dev_err(arizona->dev, + "Failed to read HPDET state: %d\n", ret); + return ret; + } + + switch (info->hpdet_ip_version) { + case 0: + if (val & ARIZONA_HP_DONE) + return 0; + break; + default: + if (val & ARIZONA_HP_DONE_B) + return 0; + break; + } + + msleep(ARIZONA_HPDET_WAIT_DELAY_MS); + } + + dev_warn(arizona->dev, "HPDET did not appear to complete\n"); + + return -ETIMEDOUT; +} + +static irqreturn_t arizona_jackdet(int irq, void *data) +{ + struct arizona_extcon_info *info = data; + struct arizona *arizona = info->arizona; + unsigned int val, present, mask; + bool cancelled_hp, cancelled_mic; + int ret, i; + + cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work); + cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work); + + pm_runtime_get_sync(info->dev); + + mutex_lock(&info->lock); + + if (info->micd_clamp) { + mask = ARIZONA_MICD_CLAMP_STS; + present = 0; + } else { + mask = ARIZONA_JD1_STS; + if (arizona->pdata.jd_invert) + present = 0; + else + present = ARIZONA_JD1_STS; + } + + ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val); + if (ret != 0) { + dev_err(arizona->dev, "Failed to read jackdet status: %d\n", + ret); + mutex_unlock(&info->lock); + pm_runtime_put_autosuspend(info->dev); + return IRQ_NONE; + } + + val &= mask; + if (val == info->last_jackdet) { + dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n"); + if (cancelled_hp) + queue_delayed_work(system_power_efficient_wq, + &info->hpdet_work, + msecs_to_jiffies(HPDET_DEBOUNCE)); + + if (cancelled_mic) { + int micd_timeout = info->micd_timeout; + + queue_delayed_work(system_power_efficient_wq, + &info->micd_timeout_work, + msecs_to_jiffies(micd_timeout)); + } + + goto out; + } + info->last_jackdet = val; + + if (info->last_jackdet == present) { + dev_dbg(arizona->dev, "Detected jack\n"); + ret = extcon_set_state_sync(info->edev, + EXTCON_MECHANICAL, true); + + if (ret != 0) + dev_err(arizona->dev, "Mechanical report failed: %d\n", + ret); + + if (!arizona->pdata.hpdet_acc_id) { + info->detecting = true; + info->mic = false; + info->jack_flips = 0; + + arizona_start_mic(info); + } else { + queue_delayed_work(system_power_efficient_wq, + &info->hpdet_work, + msecs_to_jiffies(HPDET_DEBOUNCE)); + } + + if (info->micd_clamp || !arizona->pdata.jd_invert) + regmap_update_bits(arizona->regmap, + ARIZONA_JACK_DETECT_DEBOUNCE, + ARIZONA_MICD_CLAMP_DB | + ARIZONA_JD1_DB, 0); + } else { + dev_dbg(arizona->dev, "Detected jack removal\n"); + + arizona_stop_mic(info); + + info->num_hpdet_res = 0; + for (i = 0; i < ARRAY_SIZE(info->hpdet_res); i++) + info->hpdet_res[i] = 0; + info->mic = false; + info->hpdet_done = false; + info->hpdet_retried = false; + + for (i = 0; i < info->num_micd_ranges; i++) + input_report_key(info->input, + info->micd_ranges[i].key, 0); + input_sync(info->input); + + for (i = 0; i < ARRAY_SIZE(arizona_cable) - 1; i++) { + ret = extcon_set_state_sync(info->edev, + arizona_cable[i], false); + if (ret != 0) + dev_err(arizona->dev, + "Removal report failed: %d\n", ret); + } + + /* + * If the jack was removed during a headphone detection we + * need to wait for the headphone detection to finish, as + * it can not be aborted. We don't want to be able to start + * a new headphone detection from a fresh insert until this + * one is finished. + */ + arizona_hpdet_wait(info); + + regmap_update_bits(arizona->regmap, + ARIZONA_JACK_DETECT_DEBOUNCE, + ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB, + ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB); + } + + if (arizona->pdata.micd_timeout) + info->micd_timeout = arizona->pdata.micd_timeout; + else + info->micd_timeout = DEFAULT_MICD_TIMEOUT; + +out: + /* Clear trig_sts to make sure DCVDD is not forced up */ + regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG, + ARIZONA_MICD_CLAMP_FALL_TRIG_STS | + ARIZONA_MICD_CLAMP_RISE_TRIG_STS | + ARIZONA_JD1_FALL_TRIG_STS | + ARIZONA_JD1_RISE_TRIG_STS); + + mutex_unlock(&info->lock); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); + + return IRQ_HANDLED; +} + +/* Map a level onto a slot in the register bank */ +static void arizona_micd_set_level(struct arizona *arizona, int index, + unsigned int level) +{ + int reg; + unsigned int mask; + + reg = ARIZONA_MIC_DETECT_LEVEL_4 - (index / 2); + + if (!(index % 2)) { + mask = 0x3f00; + level <<= 8; + } else { + mask = 0x3f; + } + + /* Program the level itself */ + regmap_update_bits(arizona->regmap, reg, mask, level); +} + +static int arizona_extcon_get_micd_configs(struct device *dev, + struct arizona *arizona) +{ + const char * const prop = "wlf,micd-configs"; + const int entries_per_config = 3; + struct arizona_micd_config *micd_configs; + int nconfs, ret; + int i, j; + u32 *vals; + + nconfs = device_property_read_u32_array(arizona->dev, prop, NULL, 0); + if (nconfs <= 0) + return 0; + + vals = kcalloc(nconfs, sizeof(u32), GFP_KERNEL); + if (!vals) + return -ENOMEM; + + ret = device_property_read_u32_array(arizona->dev, prop, vals, nconfs); + if (ret < 0) + goto out; + + nconfs /= entries_per_config; + micd_configs = devm_kcalloc(dev, nconfs, sizeof(*micd_configs), + GFP_KERNEL); + if (!micd_configs) { + ret = -ENOMEM; + goto out; + } + + for (i = 0, j = 0; i < nconfs; ++i) { + micd_configs[i].src = vals[j++] ? ARIZONA_ACCDET_SRC : 0; + micd_configs[i].bias = vals[j++]; + micd_configs[i].gpio = vals[j++]; + } + + arizona->pdata.micd_configs = micd_configs; + arizona->pdata.num_micd_configs = nconfs; + +out: + kfree(vals); + return ret; +} + +static int arizona_extcon_device_get_pdata(struct device *dev, + struct arizona *arizona) +{ + struct arizona_pdata *pdata = &arizona->pdata; + unsigned int val = ARIZONA_ACCDET_MODE_HPL; + int ret; + + device_property_read_u32(arizona->dev, "wlf,hpdet-channel", &val); + switch (val) { + case ARIZONA_ACCDET_MODE_HPL: + case ARIZONA_ACCDET_MODE_HPR: + pdata->hpdet_channel = val; + break; + default: + dev_err(arizona->dev, + "Wrong wlf,hpdet-channel DT value %d\n", val); + pdata->hpdet_channel = ARIZONA_ACCDET_MODE_HPL; + } + + device_property_read_u32(arizona->dev, "wlf,micd-detect-debounce", + &pdata->micd_detect_debounce); + + device_property_read_u32(arizona->dev, "wlf,micd-bias-start-time", + &pdata->micd_bias_start_time); + + device_property_read_u32(arizona->dev, "wlf,micd-rate", + &pdata->micd_rate); + + device_property_read_u32(arizona->dev, "wlf,micd-dbtime", + &pdata->micd_dbtime); + + device_property_read_u32(arizona->dev, "wlf,micd-timeout-ms", + &pdata->micd_timeout); + + pdata->micd_force_micbias = device_property_read_bool(arizona->dev, + "wlf,micd-force-micbias"); + + pdata->micd_software_compare = device_property_read_bool(arizona->dev, + "wlf,micd-software-compare"); + + pdata->jd_invert = device_property_read_bool(arizona->dev, + "wlf,jd-invert"); + + device_property_read_u32(arizona->dev, "wlf,gpsw", &pdata->gpsw); + + pdata->jd_gpio5 = device_property_read_bool(arizona->dev, + "wlf,use-jd2"); + pdata->jd_gpio5_nopull = device_property_read_bool(arizona->dev, + "wlf,use-jd2-nopull"); + + ret = arizona_extcon_get_micd_configs(dev, arizona); + if (ret < 0) + dev_err(arizona->dev, "Failed to read micd configs: %d\n", ret); + + return 0; +} + +static int arizona_extcon_probe(struct platform_device *pdev) +{ + struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); + struct arizona_pdata *pdata = &arizona->pdata; + struct arizona_extcon_info *info; + unsigned int val; + unsigned int clamp_mode; + int jack_irq_fall, jack_irq_rise; + int ret, mode, i, j; + + if (!arizona->dapm || !arizona->dapm->card) + return -EPROBE_DEFER; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + if (!dev_get_platdata(arizona->dev)) + arizona_extcon_device_get_pdata(&pdev->dev, arizona); + + info->micvdd = devm_regulator_get(&pdev->dev, "MICVDD"); + if (IS_ERR(info->micvdd)) { + ret = PTR_ERR(info->micvdd); + dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret); + return ret; + } + + mutex_init(&info->lock); + info->arizona = arizona; + info->dev = &pdev->dev; + info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS); + INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work); + INIT_DELAYED_WORK(&info->micd_detect_work, arizona_micd_detect); + INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work); + platform_set_drvdata(pdev, info); + + switch (arizona->type) { + case WM5102: + switch (arizona->rev) { + case 0: + info->micd_reva = true; + break; + default: + info->micd_clamp = true; + info->hpdet_ip_version = 1; + break; + } + break; + case WM5110: + case WM8280: + switch (arizona->rev) { + case 0 ... 2: + break; + default: + info->micd_clamp = true; + info->hpdet_ip_version = 2; + break; + } + break; + case WM8998: + case WM1814: + info->micd_clamp = true; + info->hpdet_ip_version = 2; + break; + default: + break; + } + + info->edev = devm_extcon_dev_allocate(&pdev->dev, arizona_cable); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret < 0) { + dev_err(arizona->dev, "extcon_dev_register() failed: %d\n", + ret); + return ret; + } + + info->input = devm_input_allocate_device(&pdev->dev); + if (!info->input) { + dev_err(arizona->dev, "Can't allocate input dev\n"); + ret = -ENOMEM; + goto err_register; + } + + info->input->name = "Headset"; + info->input->phys = "arizona/extcon"; + + if (pdata->num_micd_configs) { + info->micd_modes = pdata->micd_configs; + info->micd_num_modes = pdata->num_micd_configs; + } else { + info->micd_modes = micd_default_modes; + info->micd_num_modes = ARRAY_SIZE(micd_default_modes); + } + + if (arizona->pdata.gpsw > 0) + regmap_update_bits(arizona->regmap, ARIZONA_GP_SWITCH_1, + ARIZONA_SW1_MODE_MASK, arizona->pdata.gpsw); + + if (pdata->micd_pol_gpio > 0) { + if (info->micd_modes[0].gpio) + mode = GPIOF_OUT_INIT_HIGH; + else + mode = GPIOF_OUT_INIT_LOW; + + ret = devm_gpio_request_one(&pdev->dev, pdata->micd_pol_gpio, + mode, "MICD polarity"); + if (ret != 0) { + dev_err(arizona->dev, "Failed to request GPIO%d: %d\n", + pdata->micd_pol_gpio, ret); + goto err_register; + } + + info->micd_pol_gpio = gpio_to_desc(pdata->micd_pol_gpio); + } else { + if (info->micd_modes[0].gpio) + mode = GPIOD_OUT_HIGH; + else + mode = GPIOD_OUT_LOW; + + /* We can't use devm here because we need to do the get + * against the MFD device, as that is where the of_node + * will reside, but if we devm against that the GPIO + * will not be freed if the extcon driver is unloaded. + */ + info->micd_pol_gpio = gpiod_get_optional(arizona->dev, + "wlf,micd-pol", + GPIOD_OUT_LOW); + if (IS_ERR(info->micd_pol_gpio)) { + ret = PTR_ERR(info->micd_pol_gpio); + dev_err(arizona->dev, + "Failed to get microphone polarity GPIO: %d\n", + ret); + goto err_register; + } + } + + if (arizona->pdata.hpdet_id_gpio > 0) { + ret = devm_gpio_request_one(&pdev->dev, + arizona->pdata.hpdet_id_gpio, + GPIOF_OUT_INIT_LOW, + "HPDET"); + if (ret != 0) { + dev_err(arizona->dev, "Failed to request GPIO%d: %d\n", + arizona->pdata.hpdet_id_gpio, ret); + goto err_gpio; + } + } + + if (arizona->pdata.micd_bias_start_time) + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_BIAS_STARTTIME_MASK, + arizona->pdata.micd_bias_start_time + << ARIZONA_MICD_BIAS_STARTTIME_SHIFT); + + if (arizona->pdata.micd_rate) + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_RATE_MASK, + arizona->pdata.micd_rate + << ARIZONA_MICD_RATE_SHIFT); + + switch (arizona->pdata.micd_dbtime) { + case MICD_DBTIME_FOUR_READINGS: + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_DBTIME_MASK, + ARIZONA_MICD_DBTIME); + break; + case MICD_DBTIME_TWO_READINGS: + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_DBTIME_MASK, 0); + break; + default: + break; + } + + BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) < + ARIZONA_NUM_MICD_BUTTON_LEVELS); + + if (arizona->pdata.num_micd_ranges) { + info->micd_ranges = pdata->micd_ranges; + info->num_micd_ranges = pdata->num_micd_ranges; + } else { + info->micd_ranges = micd_default_ranges; + info->num_micd_ranges = ARRAY_SIZE(micd_default_ranges); + } + + if (arizona->pdata.num_micd_ranges > ARIZONA_MAX_MICD_RANGE) { + dev_err(arizona->dev, "Too many MICD ranges: %d\n", + arizona->pdata.num_micd_ranges); + } + + if (info->num_micd_ranges > 1) { + for (i = 1; i < info->num_micd_ranges; i++) { + if (info->micd_ranges[i - 1].max > + info->micd_ranges[i].max) { + dev_err(arizona->dev, + "MICD ranges must be sorted\n"); + ret = -EINVAL; + goto err_gpio; + } + } + } + + /* Disable all buttons by default */ + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2, + ARIZONA_MICD_LVL_SEL_MASK, 0x81); + + /* Set up all the buttons the user specified */ + for (i = 0; i < info->num_micd_ranges; i++) { + for (j = 0; j < ARIZONA_NUM_MICD_BUTTON_LEVELS; j++) + if (arizona_micd_levels[j] >= info->micd_ranges[i].max) + break; + + if (j == ARIZONA_NUM_MICD_BUTTON_LEVELS) { + dev_err(arizona->dev, "Unsupported MICD level %d\n", + info->micd_ranges[i].max); + ret = -EINVAL; + goto err_gpio; + } + + dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n", + arizona_micd_levels[j], i); + + arizona_micd_set_level(arizona, i, j); + input_set_capability(info->input, EV_KEY, + info->micd_ranges[i].key); + + /* Enable reporting of that range */ + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2, + 1 << i, 1 << i); + } + + /* Set all the remaining keys to a maximum */ + for (; i < ARIZONA_MAX_MICD_RANGE; i++) + arizona_micd_set_level(arizona, i, 0x3f); + + /* + * If we have a clamp use it, activating in conjunction with + * GPIO5 if that is connected for jack detect operation. + */ + if (info->micd_clamp) { + if (arizona->pdata.jd_gpio5) { + /* Put the GPIO into input mode with optional pull */ + val = 0xc101; + if (arizona->pdata.jd_gpio5_nopull) + val &= ~ARIZONA_GPN_PU; + + regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL, + val); + + if (arizona->pdata.jd_invert) + clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH_GP5H; + else + clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL_GP5H; + } else { + if (arizona->pdata.jd_invert) + clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH; + else + clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL; + } + + regmap_update_bits(arizona->regmap, + ARIZONA_MICD_CLAMP_CONTROL, + ARIZONA_MICD_CLAMP_MODE_MASK, clamp_mode); + + regmap_update_bits(arizona->regmap, + ARIZONA_JACK_DETECT_DEBOUNCE, + ARIZONA_MICD_CLAMP_DB, + ARIZONA_MICD_CLAMP_DB); + } + + arizona_extcon_set_mode(info, 0); + + pm_runtime_enable(&pdev->dev); + pm_runtime_idle(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + if (info->micd_clamp) { + jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE; + jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL; + } else { + jack_irq_rise = ARIZONA_IRQ_JD_RISE; + jack_irq_fall = ARIZONA_IRQ_JD_FALL; + } + + ret = arizona_request_irq(arizona, jack_irq_rise, + "JACKDET rise", arizona_jackdet, info); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n", + ret); + goto err_gpio; + } + + ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n", + ret); + goto err_rise; + } + + ret = arizona_request_irq(arizona, jack_irq_fall, + "JACKDET fall", arizona_jackdet, info); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret); + goto err_rise_wake; + } + + ret = arizona_set_irq_wake(arizona, jack_irq_fall, 1); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n", + ret); + goto err_fall; + } + + ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET, + "MICDET", arizona_micdet, info); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret); + goto err_fall_wake; + } + + ret = arizona_request_irq(arizona, ARIZONA_IRQ_HPDET, + "HPDET", arizona_hpdet_irq, info); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to get HPDET IRQ: %d\n", ret); + goto err_micdet; + } + + arizona_clk32k_enable(arizona); + regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE, + ARIZONA_JD1_DB, ARIZONA_JD1_DB); + regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE, + ARIZONA_JD1_ENA, ARIZONA_JD1_ENA); + + ret = regulator_allow_bypass(info->micvdd, true); + if (ret != 0) + dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n", + ret); + + pm_runtime_put(&pdev->dev); + + ret = input_register_device(info->input); + if (ret) { + dev_err(&pdev->dev, "Can't register input device: %d\n", ret); + goto err_hpdet; + } + + return 0; + +err_hpdet: + arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info); +err_micdet: + arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info); +err_fall_wake: + arizona_set_irq_wake(arizona, jack_irq_fall, 0); +err_fall: + arizona_free_irq(arizona, jack_irq_fall, info); +err_rise_wake: + arizona_set_irq_wake(arizona, jack_irq_rise, 0); +err_rise: + arizona_free_irq(arizona, jack_irq_rise, info); +err_gpio: + gpiod_put(info->micd_pol_gpio); +err_register: + pm_runtime_disable(&pdev->dev); + return ret; +} + +static int arizona_extcon_remove(struct platform_device *pdev) +{ + struct arizona_extcon_info *info = platform_get_drvdata(pdev); + struct arizona *arizona = info->arizona; + int jack_irq_rise, jack_irq_fall; + bool change; + + regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1, + ARIZONA_MICD_ENA, 0, + &change); + + if (change) { + regulator_disable(info->micvdd); + pm_runtime_put(info->dev); + } + + gpiod_put(info->micd_pol_gpio); + + pm_runtime_disable(&pdev->dev); + + regmap_update_bits(arizona->regmap, + ARIZONA_MICD_CLAMP_CONTROL, + ARIZONA_MICD_CLAMP_MODE_MASK, 0); + + if (info->micd_clamp) { + jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE; + jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL; + } else { + jack_irq_rise = ARIZONA_IRQ_JD_RISE; + jack_irq_fall = ARIZONA_IRQ_JD_FALL; + } + + arizona_set_irq_wake(arizona, jack_irq_rise, 0); + arizona_set_irq_wake(arizona, jack_irq_fall, 0); + arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info); + arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info); + arizona_free_irq(arizona, jack_irq_rise, info); + arizona_free_irq(arizona, jack_irq_fall, info); + cancel_delayed_work_sync(&info->hpdet_work); + regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE, + ARIZONA_JD1_ENA, 0); + arizona_clk32k_disable(arizona); + + return 0; +} + +static struct platform_driver arizona_extcon_driver = { + .driver = { + .name = "arizona-extcon", + }, + .probe = arizona_extcon_probe, + .remove = arizona_extcon_remove, +}; + +module_platform_driver(arizona_extcon_driver); + +MODULE_DESCRIPTION("Arizona Extcon driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:extcon-arizona"); diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c new file mode 100644 index 000000000..363b403bd --- /dev/null +++ b/drivers/extcon/extcon-axp288.c @@ -0,0 +1,507 @@ +/* + * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver + * + * Copyright (c) 2017-2018 Hans de Goede <hdegoede@redhat.com> + * Copyright (C) 2015 Intel Corporation + * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/acpi.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/notifier.h> +#include <linux/extcon-provider.h> +#include <linux/regmap.h> +#include <linux/mfd/axp20x.h> +#include <linux/usb/role.h> +#include <linux/workqueue.h> + +#include <asm/cpu_device_id.h> +#include <asm/intel-family.h> + +/* Power source status register */ +#define PS_STAT_VBUS_TRIGGER BIT(0) +#define PS_STAT_BAT_CHRG_DIR BIT(2) +#define PS_STAT_VBUS_ABOVE_VHOLD BIT(3) +#define PS_STAT_VBUS_VALID BIT(4) +#define PS_STAT_VBUS_PRESENT BIT(5) + +/* BC module global register */ +#define BC_GLOBAL_RUN BIT(0) +#define BC_GLOBAL_DET_STAT BIT(2) +#define BC_GLOBAL_DBP_TOUT BIT(3) +#define BC_GLOBAL_VLGC_COM_SEL BIT(4) +#define BC_GLOBAL_DCD_TOUT_MASK (BIT(6)|BIT(5)) +#define BC_GLOBAL_DCD_TOUT_300MS 0 +#define BC_GLOBAL_DCD_TOUT_100MS 1 +#define BC_GLOBAL_DCD_TOUT_500MS 2 +#define BC_GLOBAL_DCD_TOUT_900MS 3 +#define BC_GLOBAL_DCD_DET_SEL BIT(7) + +/* BC module vbus control and status register */ +#define VBUS_CNTL_DPDM_PD_EN BIT(4) +#define VBUS_CNTL_DPDM_FD_EN BIT(5) +#define VBUS_CNTL_FIRST_PO_STAT BIT(6) + +/* BC USB status register */ +#define USB_STAT_BUS_STAT_MASK (BIT(3)|BIT(2)|BIT(1)|BIT(0)) +#define USB_STAT_BUS_STAT_SHIFT 0 +#define USB_STAT_BUS_STAT_ATHD 0 +#define USB_STAT_BUS_STAT_CONN 1 +#define USB_STAT_BUS_STAT_SUSP 2 +#define USB_STAT_BUS_STAT_CONF 3 +#define USB_STAT_USB_SS_MODE BIT(4) +#define USB_STAT_DEAD_BAT_DET BIT(6) +#define USB_STAT_DBP_UNCFG BIT(7) + +/* BC detect status register */ +#define DET_STAT_MASK (BIT(7)|BIT(6)|BIT(5)) +#define DET_STAT_SHIFT 5 +#define DET_STAT_SDP 1 +#define DET_STAT_CDP 2 +#define DET_STAT_DCP 3 + +enum axp288_extcon_reg { + AXP288_PS_STAT_REG = 0x00, + AXP288_PS_BOOT_REASON_REG = 0x02, + AXP288_BC_GLOBAL_REG = 0x2c, + AXP288_BC_VBUS_CNTL_REG = 0x2d, + AXP288_BC_USB_STAT_REG = 0x2e, + AXP288_BC_DET_STAT_REG = 0x2f, +}; + +enum axp288_extcon_irq { + VBUS_FALLING_IRQ = 0, + VBUS_RISING_IRQ, + MV_CHNG_IRQ, + BC_USB_CHNG_IRQ, + EXTCON_IRQ_END, +}; + +static const unsigned int axp288_extcon_cables[] = { + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_CDP, + EXTCON_CHG_USB_DCP, + EXTCON_USB, + EXTCON_NONE, +}; + +struct axp288_extcon_info { + struct device *dev; + struct regmap *regmap; + struct regmap_irq_chip_data *regmap_irqc; + struct usb_role_switch *role_sw; + struct work_struct role_work; + int irq[EXTCON_IRQ_END]; + struct extcon_dev *edev; + struct extcon_dev *id_extcon; + struct notifier_block id_nb; + unsigned int previous_cable; + bool vbus_attach; +}; + +static const struct x86_cpu_id cherry_trail_cpu_ids[] = { + { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT, X86_FEATURE_ANY }, + {} +}; + +/* Power up/down reason string array */ +static const char * const axp288_pwr_up_down_info[] = { + "Last wake caused by user pressing the power button", + "Last wake caused by a charger insertion", + "Last wake caused by a battery insertion", + "Last wake caused by SOC initiated global reset", + "Last wake caused by cold reset", + "Last shutdown caused by PMIC UVLO threshold", + "Last shutdown caused by SOC initiated cold off", + "Last shutdown caused by user pressing the power button", + NULL, +}; + +/* + * Decode and log the given "reset source indicator" (rsi) + * register and then clear it. + */ +static void axp288_extcon_log_rsi(struct axp288_extcon_info *info) +{ + const char * const *rsi; + unsigned int val, i, clear_mask = 0; + int ret; + + ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val); + for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) { + if (val & BIT(i)) { + dev_dbg(info->dev, "%s\n", *rsi); + clear_mask |= BIT(i); + } + } + + /* Clear the register value for next reboot (write 1 to clear bit) */ + regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask); +} + +/* + * The below code to control the USB role-switch on devices with an AXP288 + * may seem out of place, but there are 2 reasons why this is the best place + * to control the USB role-switch on such devices: + * 1) On many devices the USB role is controlled by AML code, but the AML code + * only switches between the host and none roles, because of Windows not + * really using device mode. To make device mode work we need to toggle + * between the none/device roles based on Vbus presence, and this driver + * gets interrupts on Vbus insertion / removal. + * 2) In order for our BC1.2 charger detection to work properly the role + * mux must be properly set to device mode before we do the detection. + */ + +/* Returns the id-pin value, note pulled low / false == host-mode */ +static bool axp288_get_id_pin(struct axp288_extcon_info *info) +{ + enum usb_role role; + + if (info->id_extcon) + return extcon_get_state(info->id_extcon, EXTCON_USB_HOST) <= 0; + + /* We cannot access the id-pin, see what mode the AML code has set */ + role = usb_role_switch_get_role(info->role_sw); + return role != USB_ROLE_HOST; +} + +static void axp288_usb_role_work(struct work_struct *work) +{ + struct axp288_extcon_info *info = + container_of(work, struct axp288_extcon_info, role_work); + enum usb_role role; + bool id_pin; + int ret; + + id_pin = axp288_get_id_pin(info); + if (!id_pin) + role = USB_ROLE_HOST; + else if (info->vbus_attach) + role = USB_ROLE_DEVICE; + else + role = USB_ROLE_NONE; + + ret = usb_role_switch_set_role(info->role_sw, role); + if (ret) + dev_err(info->dev, "failed to set role: %d\n", ret); +} + +static bool axp288_get_vbus_attach(struct axp288_extcon_info *info) +{ + int ret, pwr_stat; + + ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat); + if (ret < 0) { + dev_err(info->dev, "failed to read vbus status\n"); + return false; + } + + return !!(pwr_stat & PS_STAT_VBUS_VALID); +} + +static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info) +{ + int ret, stat, cfg; + u8 chrg_type; + unsigned int cable = info->previous_cable; + bool vbus_attach = false; + + vbus_attach = axp288_get_vbus_attach(info); + if (!vbus_attach) + goto no_vbus; + + /* Check charger detection completion status */ + ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg); + if (ret < 0) + goto dev_det_ret; + if (cfg & BC_GLOBAL_DET_STAT) { + dev_dbg(info->dev, "can't complete the charger detection\n"); + goto dev_det_ret; + } + + ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat); + if (ret < 0) + goto dev_det_ret; + + chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT; + + switch (chrg_type) { + case DET_STAT_SDP: + dev_dbg(info->dev, "sdp cable is connected\n"); + cable = EXTCON_CHG_USB_SDP; + break; + case DET_STAT_CDP: + dev_dbg(info->dev, "cdp cable is connected\n"); + cable = EXTCON_CHG_USB_CDP; + break; + case DET_STAT_DCP: + dev_dbg(info->dev, "dcp cable is connected\n"); + cable = EXTCON_CHG_USB_DCP; + break; + default: + dev_warn(info->dev, "unknown (reserved) bc detect result\n"); + cable = EXTCON_CHG_USB_SDP; + } + +no_vbus: + extcon_set_state_sync(info->edev, info->previous_cable, false); + if (info->previous_cable == EXTCON_CHG_USB_SDP) + extcon_set_state_sync(info->edev, EXTCON_USB, false); + + if (vbus_attach) { + extcon_set_state_sync(info->edev, cable, vbus_attach); + if (cable == EXTCON_CHG_USB_SDP) + extcon_set_state_sync(info->edev, EXTCON_USB, + vbus_attach); + + info->previous_cable = cable; + } + + if (info->role_sw && info->vbus_attach != vbus_attach) { + info->vbus_attach = vbus_attach; + /* Setting the role can take a while */ + queue_work(system_long_wq, &info->role_work); + } + + return 0; + +dev_det_ret: + if (ret < 0) + dev_err(info->dev, "failed to detect BC Mod\n"); + + return ret; +} + +static int axp288_extcon_id_evt(struct notifier_block *nb, + unsigned long event, void *param) +{ + struct axp288_extcon_info *info = + container_of(nb, struct axp288_extcon_info, id_nb); + + /* We may not sleep and setting the role can take a while */ + queue_work(system_long_wq, &info->role_work); + + return NOTIFY_OK; +} + +static irqreturn_t axp288_extcon_isr(int irq, void *data) +{ + struct axp288_extcon_info *info = data; + int ret; + + ret = axp288_handle_chrg_det_event(info); + if (ret < 0) + dev_err(info->dev, "failed to handle the interrupt\n"); + + return IRQ_HANDLED; +} + +static void axp288_extcon_enable(struct axp288_extcon_info *info) +{ + regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG, + BC_GLOBAL_RUN, 0); + /* Enable the charger detection logic */ + regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG, + BC_GLOBAL_RUN, BC_GLOBAL_RUN); +} + +static void axp288_put_role_sw(void *data) +{ + struct axp288_extcon_info *info = data; + + cancel_work_sync(&info->role_work); + usb_role_switch_put(info->role_sw); +} + +static int axp288_extcon_probe(struct platform_device *pdev) +{ + struct axp288_extcon_info *info; + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + const char *name; + int ret, i, pirq; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->regmap = axp20x->regmap; + info->regmap_irqc = axp20x->regmap_irqc; + info->previous_cable = EXTCON_NONE; + INIT_WORK(&info->role_work, axp288_usb_role_work); + info->id_nb.notifier_call = axp288_extcon_id_evt; + + platform_set_drvdata(pdev, info); + + info->role_sw = usb_role_switch_get(dev); + if (IS_ERR(info->role_sw)) + return PTR_ERR(info->role_sw); + if (info->role_sw) { + ret = devm_add_action_or_reset(dev, axp288_put_role_sw, info); + if (ret) + return ret; + + name = acpi_dev_get_first_match_name("INT3496", NULL, -1); + if (name) { + info->id_extcon = extcon_get_extcon_dev(name); + if (!info->id_extcon) + return -EPROBE_DEFER; + + dev_info(dev, "controlling USB role\n"); + } else { + dev_info(dev, "controlling USB role based on Vbus presence\n"); + } + } + + info->vbus_attach = axp288_get_vbus_attach(info); + + axp288_extcon_log_rsi(info); + + /* Initialize extcon device */ + info->edev = devm_extcon_dev_allocate(&pdev->dev, + axp288_extcon_cables); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); + return PTR_ERR(info->edev); + } + + /* Register extcon device */ + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + return ret; + } + + for (i = 0; i < EXTCON_IRQ_END; i++) { + pirq = platform_get_irq(pdev, i); + if (pirq < 0) + return pirq; + + info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); + if (info->irq[i] < 0) { + dev_err(&pdev->dev, + "failed to get virtual interrupt=%d\n", pirq); + ret = info->irq[i]; + return ret; + } + + ret = devm_request_threaded_irq(&pdev->dev, info->irq[i], + NULL, axp288_extcon_isr, + IRQF_ONESHOT | IRQF_NO_SUSPEND, + pdev->name, info); + if (ret) { + dev_err(&pdev->dev, "failed to request interrupt=%d\n", + info->irq[i]); + return ret; + } + } + + if (info->id_extcon) { + ret = devm_extcon_register_notifier_all(dev, info->id_extcon, + &info->id_nb); + if (ret) + return ret; + } + + /* Make sure the role-sw is set correctly before doing BC detection */ + if (info->role_sw) { + queue_work(system_long_wq, &info->role_work); + flush_work(&info->role_work); + } + + /* Start charger cable type detection */ + axp288_extcon_enable(info); + + device_init_wakeup(dev, true); + platform_set_drvdata(pdev, info); + + return 0; +} + +static int __maybe_unused axp288_extcon_suspend(struct device *dev) +{ + struct axp288_extcon_info *info = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(info->irq[VBUS_RISING_IRQ]); + + return 0; +} + +static int __maybe_unused axp288_extcon_resume(struct device *dev) +{ + struct axp288_extcon_info *info = dev_get_drvdata(dev); + + /* + * Wakeup when a charger is connected to do charger-type + * connection and generate an extcon event which makes the + * axp288 charger driver set the input current limit. + */ + if (device_may_wakeup(dev)) + disable_irq_wake(info->irq[VBUS_RISING_IRQ]); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(axp288_extcon_pm_ops, axp288_extcon_suspend, + axp288_extcon_resume); + +static const struct platform_device_id axp288_extcon_table[] = { + { .name = "axp288_extcon" }, + {}, +}; +MODULE_DEVICE_TABLE(platform, axp288_extcon_table); + +static struct platform_driver axp288_extcon_driver = { + .probe = axp288_extcon_probe, + .id_table = axp288_extcon_table, + .driver = { + .name = "axp288_extcon", + .pm = &axp288_extcon_pm_ops, + }, +}; + +static struct device_connection axp288_extcon_role_sw_conn = { + .endpoint[0] = "axp288_extcon", + .endpoint[1] = "intel_xhci_usb_sw-role-switch", + .id = "usb-role-switch", +}; + +static int __init axp288_extcon_init(void) +{ + if (x86_match_cpu(cherry_trail_cpu_ids)) + device_connection_add(&axp288_extcon_role_sw_conn); + + return platform_driver_register(&axp288_extcon_driver); +} +module_init(axp288_extcon_init); + +static void __exit axp288_extcon_exit(void) +{ + if (x86_match_cpu(cherry_trail_cpu_ids)) + device_connection_remove(&axp288_extcon_role_sw_conn); + + platform_driver_unregister(&axp288_extcon_driver); +} +module_exit(axp288_extcon_exit); + +MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_DESCRIPTION("X-Powers AXP288 extcon driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c new file mode 100644 index 000000000..13ba3a6e8 --- /dev/null +++ b/drivers/extcon/extcon-gpio.c @@ -0,0 +1,171 @@ +/* + * extcon_gpio.c - Single-state GPIO extcon driver based on extcon class + * + * Copyright (C) 2008 Google, Inc. + * Author: Mike Lockwood <lockwood@android.com> + * + * Modified by MyungJoo Ham <myungjoo.ham@samsung.com> to support extcon + * (originally switch class is supported) + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/extcon-provider.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/workqueue.h> + +/** + * struct gpio_extcon_data - A simple GPIO-controlled extcon device state container. + * @edev: Extcon device. + * @irq: Interrupt line for the external connector. + * @work: Work fired by the interrupt. + * @debounce_jiffies: Number of jiffies to wait for the GPIO to stabilize, from the debounce + * value. + * @gpiod: GPIO descriptor for this external connector. + * @extcon_id: The unique id of specific external connector. + * @debounce: Debounce time for GPIO IRQ in ms. + * @irq_flags: IRQ Flags (e.g., IRQF_TRIGGER_LOW). + * @check_on_resume: Boolean describing whether to check the state of gpio + * while resuming from sleep. + */ +struct gpio_extcon_data { + struct extcon_dev *edev; + int irq; + struct delayed_work work; + unsigned long debounce_jiffies; + struct gpio_desc *gpiod; + unsigned int extcon_id; + unsigned long debounce; + unsigned long irq_flags; + bool check_on_resume; +}; + +static void gpio_extcon_work(struct work_struct *work) +{ + int state; + struct gpio_extcon_data *data = + container_of(to_delayed_work(work), struct gpio_extcon_data, + work); + + state = gpiod_get_value_cansleep(data->gpiod); + extcon_set_state_sync(data->edev, data->extcon_id, state); +} + +static irqreturn_t gpio_irq_handler(int irq, void *dev_id) +{ + struct gpio_extcon_data *data = dev_id; + + queue_delayed_work(system_power_efficient_wq, &data->work, + data->debounce_jiffies); + return IRQ_HANDLED; +} + +static int gpio_extcon_probe(struct platform_device *pdev) +{ + struct gpio_extcon_data *data; + struct device *dev = &pdev->dev; + int ret; + + data = devm_kzalloc(dev, sizeof(struct gpio_extcon_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* + * FIXME: extcon_id represents the unique identifier of external + * connectors such as EXTCON_USB, EXTCON_DISP_HDMI and so on. extcon_id + * is necessary to register the extcon device. But, it's not yet + * developed to get the extcon id from device-tree or others. + * On later, it have to be solved. + */ + if (!data->irq_flags || data->extcon_id > EXTCON_NONE) + return -EINVAL; + + data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN); + if (IS_ERR(data->gpiod)) + return PTR_ERR(data->gpiod); + data->irq = gpiod_to_irq(data->gpiod); + if (data->irq <= 0) + return data->irq; + + /* Allocate the memory of extcon devie and register extcon device */ + data->edev = devm_extcon_dev_allocate(dev, &data->extcon_id); + if (IS_ERR(data->edev)) { + dev_err(dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(dev, data->edev); + if (ret < 0) + return ret; + + INIT_DELAYED_WORK(&data->work, gpio_extcon_work); + + /* + * Request the interrupt of gpio to detect whether external connector + * is attached or detached. + */ + ret = devm_request_any_context_irq(dev, data->irq, + gpio_irq_handler, data->irq_flags, + pdev->name, data); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, data); + /* Perform initial detection */ + gpio_extcon_work(&data->work.work); + + return 0; +} + +static int gpio_extcon_remove(struct platform_device *pdev) +{ + struct gpio_extcon_data *data = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&data->work); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int gpio_extcon_resume(struct device *dev) +{ + struct gpio_extcon_data *data; + + data = dev_get_drvdata(dev); + if (data->check_on_resume) + queue_delayed_work(system_power_efficient_wq, + &data->work, data->debounce_jiffies); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume); + +static struct platform_driver gpio_extcon_driver = { + .probe = gpio_extcon_probe, + .remove = gpio_extcon_remove, + .driver = { + .name = "extcon-gpio", + .pm = &gpio_extcon_pm_ops, + }, +}; + +module_platform_driver(gpio_extcon_driver); + +MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); +MODULE_DESCRIPTION("GPIO extcon driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c new file mode 100644 index 000000000..bdb678781 --- /dev/null +++ b/drivers/extcon/extcon-intel-cht-wc.c @@ -0,0 +1,399 @@ +/* + * Extcon charger detection driver for Intel Cherrytrail Whiskey Cove PMIC + * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> + * + * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: + * Copyright (C) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/extcon-provider.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/intel_soc_pmic.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#define CHT_WC_PHYCTRL 0x5e07 + +#define CHT_WC_CHGRCTRL0 0x5e16 +#define CHT_WC_CHGRCTRL0_CHGRRESET BIT(0) +#define CHT_WC_CHGRCTRL0_EMRGCHREN BIT(1) +#define CHT_WC_CHGRCTRL0_EXTCHRDIS BIT(2) +#define CHT_WC_CHGRCTRL0_SWCONTROL BIT(3) +#define CHT_WC_CHGRCTRL0_TTLCK_MASK BIT(4) +#define CHT_WC_CHGRCTRL0_CCSM_OFF_MASK BIT(5) +#define CHT_WC_CHGRCTRL0_DBPOFF_MASK BIT(6) +#define CHT_WC_CHGRCTRL0_WDT_NOKICK BIT(7) + +#define CHT_WC_CHGRCTRL1 0x5e17 + +#define CHT_WC_USBSRC 0x5e29 +#define CHT_WC_USBSRC_STS_MASK GENMASK(1, 0) +#define CHT_WC_USBSRC_STS_SUCCESS 2 +#define CHT_WC_USBSRC_STS_FAIL 3 +#define CHT_WC_USBSRC_TYPE_SHIFT 2 +#define CHT_WC_USBSRC_TYPE_MASK GENMASK(5, 2) +#define CHT_WC_USBSRC_TYPE_NONE 0 +#define CHT_WC_USBSRC_TYPE_SDP 1 +#define CHT_WC_USBSRC_TYPE_DCP 2 +#define CHT_WC_USBSRC_TYPE_CDP 3 +#define CHT_WC_USBSRC_TYPE_ACA 4 +#define CHT_WC_USBSRC_TYPE_SE1 5 +#define CHT_WC_USBSRC_TYPE_MHL 6 +#define CHT_WC_USBSRC_TYPE_FLOAT_DP_DN 7 +#define CHT_WC_USBSRC_TYPE_OTHER 8 +#define CHT_WC_USBSRC_TYPE_DCP_EXTPHY 9 + +#define CHT_WC_PWRSRC_IRQ 0x6e03 +#define CHT_WC_PWRSRC_IRQ_MASK 0x6e0f +#define CHT_WC_PWRSRC_STS 0x6e1e +#define CHT_WC_PWRSRC_VBUS BIT(0) +#define CHT_WC_PWRSRC_DC BIT(1) +#define CHT_WC_PWRSRC_BAT BIT(2) +#define CHT_WC_PWRSRC_ID_GND BIT(3) +#define CHT_WC_PWRSRC_ID_FLOAT BIT(4) + +#define CHT_WC_VBUS_GPIO_CTLO 0x6e2d +#define CHT_WC_VBUS_GPIO_CTLO_OUTPUT BIT(0) +#define CHT_WC_VBUS_GPIO_CTLO_DRV_OD BIT(4) +#define CHT_WC_VBUS_GPIO_CTLO_DIR_OUT BIT(5) + +enum cht_wc_usb_id { + USB_ID_OTG, + USB_ID_GND, + USB_ID_FLOAT, + USB_RID_A, + USB_RID_B, + USB_RID_C, +}; + +enum cht_wc_mux_select { + MUX_SEL_PMIC = 0, + MUX_SEL_SOC, +}; + +static const unsigned int cht_wc_extcon_cables[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_CDP, + EXTCON_CHG_USB_DCP, + EXTCON_CHG_USB_ACA, + EXTCON_NONE, +}; + +struct cht_wc_extcon_data { + struct device *dev; + struct regmap *regmap; + struct extcon_dev *edev; + unsigned int previous_cable; + bool usb_host; +}; + +static int cht_wc_extcon_get_id(struct cht_wc_extcon_data *ext, int pwrsrc_sts) +{ + if (pwrsrc_sts & CHT_WC_PWRSRC_ID_GND) + return USB_ID_GND; + if (pwrsrc_sts & CHT_WC_PWRSRC_ID_FLOAT) + return USB_ID_FLOAT; + + /* + * Once we have iio support for the gpadc we should read the USBID + * gpadc channel here and determine ACA role based on that. + */ + return USB_ID_FLOAT; +} + +static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext, + bool ignore_errors) +{ + int ret, usbsrc, status; + unsigned long timeout; + + /* Charger detection can take upto 600ms, wait 800ms max. */ + timeout = jiffies + msecs_to_jiffies(800); + do { + ret = regmap_read(ext->regmap, CHT_WC_USBSRC, &usbsrc); + if (ret) { + dev_err(ext->dev, "Error reading usbsrc: %d\n", ret); + return ret; + } + + status = usbsrc & CHT_WC_USBSRC_STS_MASK; + if (status == CHT_WC_USBSRC_STS_SUCCESS || + status == CHT_WC_USBSRC_STS_FAIL) + break; + + msleep(50); /* Wait a bit before retrying */ + } while (time_before(jiffies, timeout)); + + if (status != CHT_WC_USBSRC_STS_SUCCESS) { + if (ignore_errors) + return EXTCON_CHG_USB_SDP; /* Save fallback */ + + if (status == CHT_WC_USBSRC_STS_FAIL) + dev_warn(ext->dev, "Could not detect charger type\n"); + else + dev_warn(ext->dev, "Timeout detecting charger type\n"); + return EXTCON_CHG_USB_SDP; /* Save fallback */ + } + + usbsrc = (usbsrc & CHT_WC_USBSRC_TYPE_MASK) >> CHT_WC_USBSRC_TYPE_SHIFT; + switch (usbsrc) { + default: + dev_warn(ext->dev, + "Unhandled charger type %d, defaulting to SDP\n", + ret); + return EXTCON_CHG_USB_SDP; + case CHT_WC_USBSRC_TYPE_SDP: + case CHT_WC_USBSRC_TYPE_FLOAT_DP_DN: + case CHT_WC_USBSRC_TYPE_OTHER: + return EXTCON_CHG_USB_SDP; + case CHT_WC_USBSRC_TYPE_CDP: + return EXTCON_CHG_USB_CDP; + case CHT_WC_USBSRC_TYPE_DCP: + case CHT_WC_USBSRC_TYPE_DCP_EXTPHY: + case CHT_WC_USBSRC_TYPE_MHL: /* MHL2+ delivers upto 2A, treat as DCP */ + return EXTCON_CHG_USB_DCP; + case CHT_WC_USBSRC_TYPE_ACA: + return EXTCON_CHG_USB_ACA; + } +} + +static void cht_wc_extcon_set_phymux(struct cht_wc_extcon_data *ext, u8 state) +{ + int ret; + + ret = regmap_write(ext->regmap, CHT_WC_PHYCTRL, state); + if (ret) + dev_err(ext->dev, "Error writing phyctrl: %d\n", ret); +} + +static void cht_wc_extcon_set_5v_boost(struct cht_wc_extcon_data *ext, + bool enable) +{ + int ret, val; + + /* + * The 5V boost converter is enabled through a gpio on the PMIC, since + * there currently is no gpio driver we access the gpio reg directly. + */ + val = CHT_WC_VBUS_GPIO_CTLO_DRV_OD | CHT_WC_VBUS_GPIO_CTLO_DIR_OUT; + if (enable) + val |= CHT_WC_VBUS_GPIO_CTLO_OUTPUT; + + ret = regmap_write(ext->regmap, CHT_WC_VBUS_GPIO_CTLO, val); + if (ret) + dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret); +} + +/* Small helper to sync EXTCON_CHG_USB_SDP and EXTCON_USB state */ +static void cht_wc_extcon_set_state(struct cht_wc_extcon_data *ext, + unsigned int cable, bool state) +{ + extcon_set_state_sync(ext->edev, cable, state); + if (cable == EXTCON_CHG_USB_SDP) + extcon_set_state_sync(ext->edev, EXTCON_USB, state); +} + +static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext) +{ + int ret, pwrsrc_sts, id; + unsigned int cable = EXTCON_NONE; + /* Ignore errors in host mode, as the 5v boost converter is on then */ + bool ignore_get_charger_errors = ext->usb_host; + + ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts); + if (ret) { + dev_err(ext->dev, "Error reading pwrsrc status: %d\n", ret); + return; + } + + id = cht_wc_extcon_get_id(ext, pwrsrc_sts); + if (id == USB_ID_GND) { + /* The 5v boost causes a false VBUS / SDP detect, skip */ + goto charger_det_done; + } + + /* Plugged into a host/charger or not connected? */ + if (!(pwrsrc_sts & CHT_WC_PWRSRC_VBUS)) { + /* Route D+ and D- to PMIC for future charger detection */ + cht_wc_extcon_set_phymux(ext, MUX_SEL_PMIC); + goto set_state; + } + + ret = cht_wc_extcon_get_charger(ext, ignore_get_charger_errors); + if (ret >= 0) + cable = ret; + +charger_det_done: + /* Route D+ and D- to SoC for the host or gadget controller */ + cht_wc_extcon_set_phymux(ext, MUX_SEL_SOC); + +set_state: + if (cable != ext->previous_cable) { + cht_wc_extcon_set_state(ext, cable, true); + cht_wc_extcon_set_state(ext, ext->previous_cable, false); + ext->previous_cable = cable; + } + + ext->usb_host = ((id == USB_ID_GND) || (id == USB_RID_A)); + extcon_set_state_sync(ext->edev, EXTCON_USB_HOST, ext->usb_host); +} + +static irqreturn_t cht_wc_extcon_isr(int irq, void *data) +{ + struct cht_wc_extcon_data *ext = data; + int ret, irqs; + + ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_IRQ, &irqs); + if (ret) { + dev_err(ext->dev, "Error reading irqs: %d\n", ret); + return IRQ_NONE; + } + + cht_wc_extcon_pwrsrc_event(ext); + + ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ, irqs); + if (ret) { + dev_err(ext->dev, "Error writing irqs: %d\n", ret); + return IRQ_NONE; + } + + return IRQ_HANDLED; +} + +static int cht_wc_extcon_sw_control(struct cht_wc_extcon_data *ext, bool enable) +{ + int ret, mask, val; + + mask = CHT_WC_CHGRCTRL0_SWCONTROL | CHT_WC_CHGRCTRL0_CCSM_OFF_MASK; + val = enable ? mask : 0; + ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL0, mask, val); + if (ret) + dev_err(ext->dev, "Error setting sw control: %d\n", ret); + + return ret; +} + +static int cht_wc_extcon_probe(struct platform_device *pdev) +{ + struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent); + struct cht_wc_extcon_data *ext; + int irq, ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ext = devm_kzalloc(&pdev->dev, sizeof(*ext), GFP_KERNEL); + if (!ext) + return -ENOMEM; + + ext->dev = &pdev->dev; + ext->regmap = pmic->regmap; + ext->previous_cable = EXTCON_NONE; + + /* Initialize extcon device */ + ext->edev = devm_extcon_dev_allocate(ext->dev, cht_wc_extcon_cables); + if (IS_ERR(ext->edev)) + return PTR_ERR(ext->edev); + + /* + * When a host-cable is detected the BIOS enables an external 5v boost + * converter to power connected devices there are 2 problems with this: + * 1) This gets seen by the external battery charger as a valid Vbus + * supply and it then tries to feed Vsys from this creating a + * feedback loop which causes aprox. 300 mA extra battery drain + * (and unless we drive the external-charger-disable pin high it + * also tries to charge the battery causing even more feedback). + * 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply + * Since the external battery charger has its own 5v boost converter + * which does not have these issues, we simply turn the separate + * external 5v boost converter off and leave it off entirely. + */ + cht_wc_extcon_set_5v_boost(ext, false); + + /* Enable sw control */ + ret = cht_wc_extcon_sw_control(ext, true); + if (ret) + return ret; + + /* Register extcon device */ + ret = devm_extcon_dev_register(ext->dev, ext->edev); + if (ret) { + dev_err(ext->dev, "Error registering extcon device: %d\n", ret); + goto disable_sw_control; + } + + /* Route D+ and D- to PMIC for initial charger detection */ + cht_wc_extcon_set_phymux(ext, MUX_SEL_PMIC); + + /* Get initial state */ + cht_wc_extcon_pwrsrc_event(ext); + + ret = devm_request_threaded_irq(ext->dev, irq, NULL, cht_wc_extcon_isr, + IRQF_ONESHOT, pdev->name, ext); + if (ret) { + dev_err(ext->dev, "Error requesting interrupt: %d\n", ret); + goto disable_sw_control; + } + + /* Unmask irqs */ + ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ_MASK, + (int)~(CHT_WC_PWRSRC_VBUS | CHT_WC_PWRSRC_ID_GND | + CHT_WC_PWRSRC_ID_FLOAT)); + if (ret) { + dev_err(ext->dev, "Error writing irq-mask: %d\n", ret); + goto disable_sw_control; + } + + platform_set_drvdata(pdev, ext); + + return 0; + +disable_sw_control: + cht_wc_extcon_sw_control(ext, false); + return ret; +} + +static int cht_wc_extcon_remove(struct platform_device *pdev) +{ + struct cht_wc_extcon_data *ext = platform_get_drvdata(pdev); + + cht_wc_extcon_sw_control(ext, false); + + return 0; +} + +static const struct platform_device_id cht_wc_extcon_table[] = { + { .name = "cht_wcove_pwrsrc" }, + {}, +}; +MODULE_DEVICE_TABLE(platform, cht_wc_extcon_table); + +static struct platform_driver cht_wc_extcon_driver = { + .probe = cht_wc_extcon_probe, + .remove = cht_wc_extcon_remove, + .id_table = cht_wc_extcon_table, + .driver = { + .name = "cht_wcove_pwrsrc", + }, +}; +module_platform_driver(cht_wc_extcon_driver); + +MODULE_DESCRIPTION("Intel Cherrytrail Whiskey Cove PMIC extcon driver"); +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-intel-int3496.c b/drivers/extcon/extcon-intel-int3496.c new file mode 100644 index 000000000..fd24debe5 --- /dev/null +++ b/drivers/extcon/extcon-intel-int3496.c @@ -0,0 +1,195 @@ +/* + * Intel INT3496 ACPI device extcon driver + * + * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com> + * + * Based on android x86 kernel code which is: + * + * Copyright (c) 2014, Intel Corporation. + * Author: David Cohen <david.a.cohen@linux.intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/acpi.h> +#include <linux/extcon-provider.h> +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#define INT3496_GPIO_USB_ID 0 +#define INT3496_GPIO_VBUS_EN 1 +#define INT3496_GPIO_USB_MUX 2 +#define DEBOUNCE_TIME msecs_to_jiffies(50) + +struct int3496_data { + struct device *dev; + struct extcon_dev *edev; + struct delayed_work work; + struct gpio_desc *gpio_usb_id; + struct gpio_desc *gpio_vbus_en; + struct gpio_desc *gpio_usb_mux; + int usb_id_irq; +}; + +static const unsigned int int3496_cable[] = { + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static const struct acpi_gpio_params id_gpios = { INT3496_GPIO_USB_ID, 0, false }; +static const struct acpi_gpio_params vbus_gpios = { INT3496_GPIO_VBUS_EN, 0, false }; +static const struct acpi_gpio_params mux_gpios = { INT3496_GPIO_USB_MUX, 0, false }; + +static const struct acpi_gpio_mapping acpi_int3496_default_gpios[] = { + /* + * Some platforms have a bug in ACPI GPIO description making IRQ + * GPIO to be output only. Ask the GPIO core to ignore this limit. + */ + { "id-gpios", &id_gpios, 1, ACPI_GPIO_QUIRK_NO_IO_RESTRICTION }, + { "vbus-gpios", &vbus_gpios, 1 }, + { "mux-gpios", &mux_gpios, 1 }, + { }, +}; + +static void int3496_do_usb_id(struct work_struct *work) +{ + struct int3496_data *data = + container_of(work, struct int3496_data, work.work); + int id = gpiod_get_value_cansleep(data->gpio_usb_id); + + /* id == 1: PERIPHERAL, id == 0: HOST */ + dev_dbg(data->dev, "Connected %s cable\n", id ? "PERIPHERAL" : "HOST"); + + /* + * Peripheral: set USB mux to peripheral and disable VBUS + * Host: set USB mux to host and enable VBUS + */ + if (!IS_ERR(data->gpio_usb_mux)) + gpiod_direction_output(data->gpio_usb_mux, id); + + if (!IS_ERR(data->gpio_vbus_en)) + gpiod_direction_output(data->gpio_vbus_en, !id); + + extcon_set_state_sync(data->edev, EXTCON_USB_HOST, !id); +} + +static irqreturn_t int3496_thread_isr(int irq, void *priv) +{ + struct int3496_data *data = priv; + + /* Let the pin settle before processing it */ + mod_delayed_work(system_wq, &data->work, DEBOUNCE_TIME); + + return IRQ_HANDLED; +} + +static int int3496_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct int3496_data *data; + int ret; + + ret = devm_acpi_dev_add_driver_gpios(dev, acpi_int3496_default_gpios); + if (ret) { + dev_err(dev, "can't add GPIO ACPI mapping\n"); + return ret; + } + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->dev = dev; + INIT_DELAYED_WORK(&data->work, int3496_do_usb_id); + + data->gpio_usb_id = devm_gpiod_get(dev, "id", GPIOD_IN); + if (IS_ERR(data->gpio_usb_id)) { + ret = PTR_ERR(data->gpio_usb_id); + dev_err(dev, "can't request USB ID GPIO: %d\n", ret); + return ret; + } + + data->usb_id_irq = gpiod_to_irq(data->gpio_usb_id); + if (data->usb_id_irq < 0) { + dev_err(dev, "can't get USB ID IRQ: %d\n", data->usb_id_irq); + return data->usb_id_irq; + } + + data->gpio_vbus_en = devm_gpiod_get(dev, "vbus", GPIOD_ASIS); + if (IS_ERR(data->gpio_vbus_en)) + dev_info(dev, "can't request VBUS EN GPIO\n"); + + data->gpio_usb_mux = devm_gpiod_get(dev, "mux", GPIOD_ASIS); + if (IS_ERR(data->gpio_usb_mux)) + dev_info(dev, "can't request USB MUX GPIO\n"); + + /* register extcon device */ + data->edev = devm_extcon_dev_allocate(dev, int3496_cable); + if (IS_ERR(data->edev)) + return -ENOMEM; + + ret = devm_extcon_dev_register(dev, data->edev); + if (ret < 0) { + dev_err(dev, "can't register extcon device: %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(dev, data->usb_id_irq, + NULL, int3496_thread_isr, + IRQF_SHARED | IRQF_ONESHOT | + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING, + dev_name(dev), data); + if (ret < 0) { + dev_err(dev, "can't request IRQ for USB ID GPIO: %d\n", ret); + return ret; + } + + /* process id-pin so that we start with the right status */ + queue_delayed_work(system_wq, &data->work, 0); + flush_delayed_work(&data->work); + + platform_set_drvdata(pdev, data); + + return 0; +} + +static int int3496_remove(struct platform_device *pdev) +{ + struct int3496_data *data = platform_get_drvdata(pdev); + + devm_free_irq(&pdev->dev, data->usb_id_irq, data); + cancel_delayed_work_sync(&data->work); + + return 0; +} + +static const struct acpi_device_id int3496_acpi_match[] = { + { "INT3496" }, + { } +}; +MODULE_DEVICE_TABLE(acpi, int3496_acpi_match); + +static struct platform_driver int3496_driver = { + .driver = { + .name = "intel-int3496", + .acpi_match_table = int3496_acpi_match, + }, + .probe = int3496_probe, + .remove = int3496_remove, +}; + +module_platform_driver(int3496_driver); + +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_DESCRIPTION("Intel INT3496 ACPI device extcon driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c new file mode 100644 index 000000000..b871836da --- /dev/null +++ b/drivers/extcon/extcon-max14577.c @@ -0,0 +1,798 @@ +/* + * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC + * + * Copyright (C) 2013,2014 Samsung Electronics + * Chanwoo Choi <cw00.choi@samsung.com> + * Krzysztof Kozlowski <krzk@kernel.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/mfd/max14577.h> +#include <linux/mfd/max14577-private.h> +#include <linux/extcon-provider.h> + +#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ + +enum max14577_muic_adc_debounce_time { + ADC_DEBOUNCE_TIME_5MS = 0, + ADC_DEBOUNCE_TIME_10MS, + ADC_DEBOUNCE_TIME_25MS, + ADC_DEBOUNCE_TIME_38_62MS, +}; + +enum max14577_muic_status { + MAX14577_MUIC_STATUS1 = 0, + MAX14577_MUIC_STATUS2 = 1, + MAX14577_MUIC_STATUS_END, +}; + +/** + * struct max14577_muic_irq + * @irq: the index of irq list of MUIC device. + * @name: the name of irq. + * @virq: the virtual irq to use irq domain + */ +struct max14577_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +static struct max14577_muic_irq max14577_muic_irqs[] = { + { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, + { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, + { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, + { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, + { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, + { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, + { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, + { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, +}; + +static struct max14577_muic_irq max77836_muic_irqs[] = { + { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, + { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, + { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, + { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, + { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, + { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, + { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, + { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, + { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, + { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, +}; + +struct max14577_muic_info { + struct device *dev; + struct max14577 *max14577; + struct extcon_dev *edev; + int prev_cable_type; + int prev_chg_type; + u8 status[MAX14577_MUIC_STATUS_END]; + + struct max14577_muic_irq *muic_irqs; + unsigned int muic_irqs_num; + bool irq_adc; + bool irq_chg; + struct work_struct irq_work; + struct mutex mutex; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; + + /* + * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB + * h/w path of COMP2/COMN1 on CONTROL1 register. + */ + int path_usb; + int path_uart; +}; + +enum max14577_muic_cable_group { + MAX14577_CABLE_GROUP_ADC = 0, + MAX14577_CABLE_GROUP_CHG, +}; + +/* Define supported accessory type */ +enum max14577_muic_acc_type { + MAX14577_MUIC_ADC_GROUND = 0x0, + MAX14577_MUIC_ADC_SEND_END_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, + MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, + MAX14577_MUIC_ADC_RESERVED_ACC_1, + MAX14577_MUIC_ADC_RESERVED_ACC_2, + MAX14577_MUIC_ADC_RESERVED_ACC_3, + MAX14577_MUIC_ADC_RESERVED_ACC_4, + MAX14577_MUIC_ADC_RESERVED_ACC_5, + MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, + MAX14577_MUIC_ADC_PHONE_POWERED_DEV, + MAX14577_MUIC_ADC_TTY_CONVERTER, + MAX14577_MUIC_ADC_UART_CABLE, + MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, + MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, + MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, + MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, + MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, + MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, + MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, + MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ + MAX14577_MUIC_ADC_OPEN, +}; + +static const unsigned int max14577_extcon_cable[] = { + EXTCON_USB, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_CHG_USB_CDP, + EXTCON_JIG, + EXTCON_NONE, +}; + +/* + * max14577_muic_set_debounce_time - Set the debounce time of ADC + * @info: the instance including private data of max14577 MUIC + * @time: the debounce time of ADC + */ +static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, + enum max14577_muic_adc_debounce_time time) +{ + u8 ret; + + switch (time) { + case ADC_DEBOUNCE_TIME_5MS: + case ADC_DEBOUNCE_TIME_10MS: + case ADC_DEBOUNCE_TIME_25MS: + case ADC_DEBOUNCE_TIME_38_62MS: + ret = max14577_update_reg(info->max14577->regmap, + MAX14577_MUIC_REG_CONTROL3, + CTRL3_ADCDBSET_MASK, + time << CTRL3_ADCDBSET_SHIFT); + if (ret) { + dev_err(info->dev, "failed to set ADC debounce time\n"); + return ret; + } + break; + default: + dev_err(info->dev, "invalid ADC debounce time\n"); + return -EINVAL; + } + + return 0; +}; + +/* + * max14577_muic_set_path - Set hardware line according to attached cable + * @info: the instance including private data of max14577 MUIC + * @value: the path according to attached cable + * @attached: the state of cable (true:attached, false:detached) + * + * The max14577 MUIC device share outside H/W line among a varity of cables + * so, this function set internal path of H/W line according to the type of + * attached cable. + */ +static int max14577_muic_set_path(struct max14577_muic_info *info, + u8 val, bool attached) +{ + u8 ctrl1, ctrl2 = 0; + int ret; + + /* Set open state to path before changing hw path */ + ret = max14577_update_reg(info->max14577->regmap, + MAX14577_MUIC_REG_CONTROL1, + CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + if (attached) + ctrl1 = val; + else + ctrl1 = CTRL1_SW_OPEN; + + ret = max14577_update_reg(info->max14577->regmap, + MAX14577_MUIC_REG_CONTROL1, + CLEAR_IDBEN_MICEN_MASK, ctrl1); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + if (attached) + ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ + else + ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ + + ret = max14577_update_reg(info->max14577->regmap, + MAX14577_REG_CONTROL2, + CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + dev_dbg(info->dev, + "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", + ctrl1, ctrl2, attached ? "attached" : "detached"); + + return 0; +} + +/* + * max14577_muic_get_cable_type - Return cable type and check cable state + * @info: the instance including private data of max14577 MUIC + * @group: the path according to attached cable + * @attached: store cable state and return + * + * This function check the cable state either attached or detached, + * and then divide precise type of cable according to cable group. + * - max14577_CABLE_GROUP_ADC + * - max14577_CABLE_GROUP_CHG + */ +static int max14577_muic_get_cable_type(struct max14577_muic_info *info, + enum max14577_muic_cable_group group, bool *attached) +{ + int cable_type = 0; + int adc; + int chg_type; + + switch (group) { + case MAX14577_CABLE_GROUP_ADC: + /* + * Read ADC value to check cable type and decide cable state + * according to cable type + */ + adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; + adc >>= STATUS1_ADC_SHIFT; + + /* + * Check current cable state/cable type and store cable type + * (info->prev_cable_type) for handling cable when cable is + * detached. + */ + if (adc == MAX14577_MUIC_ADC_OPEN) { + *attached = false; + + cable_type = info->prev_cable_type; + info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; + } else { + *attached = true; + + cable_type = info->prev_cable_type = adc; + } + break; + case MAX14577_CABLE_GROUP_CHG: + /* + * Read charger type to check cable type and decide cable state + * according to type of charger cable. + */ + chg_type = info->status[MAX14577_MUIC_STATUS2] & + STATUS2_CHGTYP_MASK; + chg_type >>= STATUS2_CHGTYP_SHIFT; + + if (chg_type == MAX14577_CHARGER_TYPE_NONE) { + *attached = false; + + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; + } else { + *attached = true; + + /* + * Check current cable state/cable type and store cable + * type(info->prev_chg_type) for handling cable when + * charger cable is detached. + */ + cable_type = info->prev_chg_type = chg_type; + } + + break; + default: + dev_err(info->dev, "Unknown cable group (%d)\n", group); + cable_type = -EINVAL; + break; + } + + return cable_type; +} + +static int max14577_muic_jig_handler(struct max14577_muic_info *info, + int cable_type, bool attached) +{ + int ret = 0; + u8 path = CTRL1_SW_OPEN; + + dev_dbg(info->dev, + "external connector is %s (adc:0x%02x)\n", + attached ? "attached" : "detached", cable_type); + + switch (cable_type) { + case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ + case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ + /* PATH:AP_USB */ + path = CTRL1_SW_USB; + break; + case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ + /* PATH:AP_UART */ + path = CTRL1_SW_UART; + break; + default: + dev_err(info->dev, "failed to detect %s jig cable\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + ret = max14577_muic_set_path(info, path, attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_JIG, attached); + + return 0; +} + +static int max14577_muic_adc_handler(struct max14577_muic_info *info) +{ + int cable_type; + bool attached; + int ret = 0; + + /* Check accessory state which is either detached or attached */ + cable_type = max14577_muic_get_cable_type(info, + MAX14577_CABLE_GROUP_ADC, &attached); + + dev_dbg(info->dev, + "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", + attached ? "attached" : "detached", cable_type, + info->prev_cable_type); + + switch (cable_type) { + case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: + case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: + case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: + /* JIG */ + ret = max14577_muic_jig_handler(info, cable_type, attached); + if (ret < 0) + return ret; + break; + case MAX14577_MUIC_ADC_GROUND: + case MAX14577_MUIC_ADC_SEND_END_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: + case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: + case MAX14577_MUIC_ADC_RESERVED_ACC_1: + case MAX14577_MUIC_ADC_RESERVED_ACC_2: + case MAX14577_MUIC_ADC_RESERVED_ACC_3: + case MAX14577_MUIC_ADC_RESERVED_ACC_4: + case MAX14577_MUIC_ADC_RESERVED_ACC_5: + case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: + case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: + case MAX14577_MUIC_ADC_TTY_CONVERTER: + case MAX14577_MUIC_ADC_UART_CABLE: + case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: + case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: + case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: + case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: + case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: + /* + * This accessory isn't used in general case if it is specially + * needed to detect additional accessory, should implement + * proper operation when this accessory is attached/detached. + */ + dev_info(info->dev, + "accessory is %s but it isn't used (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EAGAIN; + default: + dev_err(info->dev, + "failed to detect %s accessory (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EINVAL; + } + + return 0; +} + +static int max14577_muic_chg_handler(struct max14577_muic_info *info) +{ + int chg_type; + bool attached; + int ret = 0; + + chg_type = max14577_muic_get_cable_type(info, + MAX14577_CABLE_GROUP_CHG, &attached); + + dev_dbg(info->dev, + "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", + attached ? "attached" : "detached", + chg_type, info->prev_chg_type); + + switch (chg_type) { + case MAX14577_CHARGER_TYPE_USB: + /* PATH:AP_USB */ + ret = max14577_muic_set_path(info, info->path_usb, attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_USB, attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + break; + case MAX14577_CHARGER_TYPE_DEDICATED_CHG: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + attached); + break; + case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, + attached); + break; + case MAX14577_CHARGER_TYPE_SPECIAL_500MA: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, + attached); + break; + case MAX14577_CHARGER_TYPE_SPECIAL_1A: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, + attached); + break; + case MAX14577_CHARGER_TYPE_NONE: + case MAX14577_CHARGER_TYPE_DEAD_BATTERY: + break; + default: + dev_err(info->dev, + "failed to detect %s accessory (chg_type:0x%x)\n", + attached ? "attached" : "detached", chg_type); + return -EINVAL; + } + + return 0; +} + +static void max14577_muic_irq_work(struct work_struct *work) +{ + struct max14577_muic_info *info = container_of(work, + struct max14577_muic_info, irq_work); + int ret = 0; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + ret = max14577_bulk_read(info->max14577->regmap, + MAX14577_MUIC_REG_STATUS1, info->status, 2); + if (ret) { + dev_err(info->dev, "failed to read MUIC register\n"); + mutex_unlock(&info->mutex); + return; + } + + if (info->irq_adc) { + ret = max14577_muic_adc_handler(info); + info->irq_adc = false; + } + if (info->irq_chg) { + ret = max14577_muic_chg_handler(info); + info->irq_chg = false; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +/* + * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. + * Returns 0 if irq_type does not match registered IRQ for this device type. + */ +static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) +{ + switch (irq_type) { + case MAX14577_IRQ_INT1_ADC: + case MAX14577_IRQ_INT1_ADCLOW: + case MAX14577_IRQ_INT1_ADCERR: + /* + * Handle all of accessory except for + * type of charger accessory. + */ + info->irq_adc = true; + return 1; + case MAX14577_IRQ_INT2_CHGTYP: + case MAX14577_IRQ_INT2_CHGDETRUN: + case MAX14577_IRQ_INT2_DCDTMR: + case MAX14577_IRQ_INT2_DBCHG: + case MAX14577_IRQ_INT2_VBVOLT: + /* Handle charger accessory */ + info->irq_chg = true; + return 1; + default: + return 0; + } +} + +/* + * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. + * Returns 0 if irq_type does not match registered IRQ for this device type. + */ +static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) +{ + /* First check common max14577 interrupts */ + if (max14577_parse_irq(info, irq_type)) + return 1; + + switch (irq_type) { + case MAX77836_IRQ_INT1_ADC1K: + info->irq_adc = true; + return 1; + case MAX77836_IRQ_INT2_VIDRM: + /* Handle charger accessory */ + info->irq_chg = true; + return 1; + default: + return 0; + } +} + +static irqreturn_t max14577_muic_irq_handler(int irq, void *data) +{ + struct max14577_muic_info *info = data; + int i, irq_type = -1; + bool irq_parsed; + + /* + * We may be called multiple times for different nested IRQ-s. + * Including changes in INT1_ADC and INT2_CGHTYP at once. + * However we only need to know whether it was ADC, charger + * or both interrupts so decode IRQ and turn on proper flags. + */ + for (i = 0; i < info->muic_irqs_num; i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->muic_irqs[i].irq; + + switch (info->max14577->dev_type) { + case MAXIM_DEVICE_TYPE_MAX77836: + irq_parsed = max77836_parse_irq(info, irq_type); + break; + case MAXIM_DEVICE_TYPE_MAX14577: + default: + irq_parsed = max14577_parse_irq(info, irq_type); + break; + } + + if (!irq_parsed) { + dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", + irq_type); + return IRQ_HANDLED; + } + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static int max14577_muic_detect_accessory(struct max14577_muic_info *info) +{ + int ret = 0; + int adc; + int chg_type; + bool attached; + + mutex_lock(&info->mutex); + + /* Read STATUSx register to detect accessory */ + ret = max14577_bulk_read(info->max14577->regmap, + MAX14577_MUIC_REG_STATUS1, info->status, 2); + if (ret) { + dev_err(info->dev, "failed to read MUIC register\n"); + mutex_unlock(&info->mutex); + return ret; + } + + adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, + &attached); + if (attached && adc != MAX14577_MUIC_ADC_OPEN) { + ret = max14577_muic_adc_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect accessory\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, + &attached); + if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { + ret = max14577_muic_chg_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect charger accessory\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + mutex_unlock(&info->mutex); + + return 0; +} + +static void max14577_muic_detect_cable_wq(struct work_struct *work) +{ + struct max14577_muic_info *info = container_of(to_delayed_work(work), + struct max14577_muic_info, wq_detcable); + + max14577_muic_detect_accessory(info); +} + +static int max14577_muic_probe(struct platform_device *pdev) +{ + struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); + struct max14577_muic_info *info; + int delay_jiffies; + int ret; + int i; + u8 id; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->max14577 = max14577; + + platform_set_drvdata(pdev, info); + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, max14577_muic_irq_work); + + switch (max14577->dev_type) { + case MAXIM_DEVICE_TYPE_MAX77836: + info->muic_irqs = max77836_muic_irqs; + info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); + break; + case MAXIM_DEVICE_TYPE_MAX14577: + default: + info->muic_irqs = max14577_muic_irqs; + info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); + } + + /* Support irq domain for max14577 MUIC device */ + for (i = 0; i < info->muic_irqs_num; i++) { + struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; + int virq = 0; + + virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); + if (virq <= 0) + return -EINVAL; + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, + max14577_muic_irq_handler, + IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(&pdev->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + return ret; + } + } + + /* Initialize extcon device */ + info->edev = devm_extcon_dev_allocate(&pdev->dev, + max14577_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + return ret; + } + + /* Default h/w line path */ + info->path_usb = CTRL1_SW_USB; + info->path_uart = CTRL1_SW_UART; + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + + /* Set initial path for UART */ + max14577_muic_set_path(info, info->path_uart, true); + + /* Check revision number of MUIC device*/ + ret = max14577_read_reg(info->max14577->regmap, + MAX14577_REG_DEVICEID, &id); + if (ret < 0) { + dev_err(&pdev->dev, "failed to read revision number\n"); + return ret; + } + dev_info(info->dev, "device ID : 0x%x\n", id); + + /* Set ADC debounce time */ + max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + delay_jiffies); + + return ret; +} + +static int max14577_muic_remove(struct platform_device *pdev) +{ + struct max14577_muic_info *info = platform_get_drvdata(pdev); + + cancel_work_sync(&info->irq_work); + + return 0; +} + +static const struct platform_device_id max14577_muic_id[] = { + { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, + { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, + { } +}; +MODULE_DEVICE_TABLE(platform, max14577_muic_id); + +static struct platform_driver max14577_muic_driver = { + .driver = { + .name = "max14577-muic", + }, + .probe = max14577_muic_probe, + .remove = max14577_muic_remove, + .id_table = max14577_muic_id, +}; + +module_platform_driver(max14577_muic_driver); + +MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:extcon-max14577"); diff --git a/drivers/extcon/extcon-max3355.c b/drivers/extcon/extcon-max3355.c new file mode 100644 index 000000000..1335a476b --- /dev/null +++ b/drivers/extcon/extcon-max3355.c @@ -0,0 +1,147 @@ +/* + * Maxim Integrated MAX3355 USB OTG chip extcon driver + * + * Copyright (C) 2014-2015 Cogent Embedded, Inc. + * Author: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + */ + +#include <linux/extcon-provider.h> +#include <linux/gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> + +struct max3355_data { + struct extcon_dev *edev; + struct gpio_desc *id_gpiod; + struct gpio_desc *shdn_gpiod; +}; + +static const unsigned int max3355_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static irqreturn_t max3355_id_irq(int irq, void *dev_id) +{ + struct max3355_data *data = dev_id; + int id = gpiod_get_value_cansleep(data->id_gpiod); + + if (id) { + /* + * ID = 1 means USB HOST cable detached. + * As we don't have event for USB peripheral cable attached, + * we simulate USB peripheral attach here. + */ + extcon_set_state_sync(data->edev, EXTCON_USB_HOST, false); + extcon_set_state_sync(data->edev, EXTCON_USB, true); + } else { + /* + * ID = 0 means USB HOST cable attached. + * As we don't have event for USB peripheral cable detached, + * we simulate USB peripheral detach here. + */ + extcon_set_state_sync(data->edev, EXTCON_USB, false); + extcon_set_state_sync(data->edev, EXTCON_USB_HOST, true); + } + + return IRQ_HANDLED; +} + +static int max3355_probe(struct platform_device *pdev) +{ + struct max3355_data *data; + struct gpio_desc *gpiod; + int irq, err; + + data = devm_kzalloc(&pdev->dev, sizeof(struct max3355_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + gpiod = devm_gpiod_get(&pdev->dev, "id", GPIOD_IN); + if (IS_ERR(gpiod)) { + dev_err(&pdev->dev, "failed to get ID_OUT GPIO\n"); + return PTR_ERR(gpiod); + } + data->id_gpiod = gpiod; + + gpiod = devm_gpiod_get(&pdev->dev, "maxim,shdn", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod)) { + dev_err(&pdev->dev, "failed to get SHDN# GPIO\n"); + return PTR_ERR(gpiod); + } + data->shdn_gpiod = gpiod; + + data->edev = devm_extcon_dev_allocate(&pdev->dev, max3355_cable); + if (IS_ERR(data->edev)) { + dev_err(&pdev->dev, "failed to allocate extcon device\n"); + return PTR_ERR(data->edev); + } + + err = devm_extcon_dev_register(&pdev->dev, data->edev); + if (err < 0) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + return err; + } + + irq = gpiod_to_irq(data->id_gpiod); + if (irq < 0) { + dev_err(&pdev->dev, "failed to translate ID_OUT GPIO to IRQ\n"); + return irq; + } + + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, max3355_id_irq, + IRQF_ONESHOT | IRQF_NO_SUSPEND | + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING, + pdev->name, data); + if (err < 0) { + dev_err(&pdev->dev, "failed to request ID_OUT IRQ\n"); + return err; + } + + platform_set_drvdata(pdev, data); + + /* Perform initial detection */ + max3355_id_irq(irq, data); + + return 0; +} + +static int max3355_remove(struct platform_device *pdev) +{ + struct max3355_data *data = platform_get_drvdata(pdev); + + gpiod_set_value_cansleep(data->shdn_gpiod, 0); + + return 0; +} + +static const struct of_device_id max3355_match_table[] = { + { .compatible = "maxim,max3355", }, + { } +}; +MODULE_DEVICE_TABLE(of, max3355_match_table); + +static struct platform_driver max3355_driver = { + .probe = max3355_probe, + .remove = max3355_remove, + .driver = { + .name = "extcon-max3355", + .of_match_table = max3355_match_table, + }, +}; + +module_platform_driver(max3355_driver); + +MODULE_AUTHOR("Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>"); +MODULE_DESCRIPTION("Maxim MAX3355 extcon driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c new file mode 100644 index 000000000..c221a0aec --- /dev/null +++ b/drivers/extcon/extcon-max77693.c @@ -0,0 +1,1278 @@ +/* + * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC + * + * Copyright (C) 2012 Samsung Electrnoics + * Chanwoo Choi <cw00.choi@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/mfd/max77693.h> +#include <linux/mfd/max77693-common.h> +#include <linux/mfd/max77693-private.h> +#include <linux/extcon-provider.h> +#include <linux/regmap.h> +#include <linux/irqdomain.h> + +#define DEV_NAME "max77693-muic" +#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ + +/* + * Default value of MAX77693 register to bring up MUIC device. + * If user don't set some initial value for MUIC device through platform data, + * extcon-max77693 driver use 'default_init_data' to bring up base operation + * of MAX77693 MUIC device. + */ +static struct max77693_reg_data default_init_data[] = { + { + /* STATUS2 - [3]ChgDetRun */ + .addr = MAX77693_MUIC_REG_STATUS2, + .data = MAX77693_STATUS2_CHGDETRUN_MASK, + }, { + /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ + .addr = MAX77693_MUIC_REG_INTMASK1, + .data = INTMASK1_ADC1K_MASK + | INTMASK1_ADC_MASK, + }, { + /* INTMASK2 - Unmask [0]ChgTypM */ + .addr = MAX77693_MUIC_REG_INTMASK2, + .data = INTMASK2_CHGTYP_MASK, + }, { + /* INTMASK3 - Mask all of interrupts */ + .addr = MAX77693_MUIC_REG_INTMASK3, + .data = 0x0, + }, { + /* CDETCTRL2 */ + .addr = MAX77693_MUIC_REG_CDETCTRL2, + .data = CDETCTRL2_VIDRMEN_MASK + | CDETCTRL2_DXOVPEN_MASK, + }, +}; + +enum max77693_muic_adc_debounce_time { + ADC_DEBOUNCE_TIME_5MS = 0, + ADC_DEBOUNCE_TIME_10MS, + ADC_DEBOUNCE_TIME_25MS, + ADC_DEBOUNCE_TIME_38_62MS, +}; + +struct max77693_muic_info { + struct device *dev; + struct max77693_dev *max77693; + struct extcon_dev *edev; + int prev_cable_type; + int prev_cable_type_gnd; + int prev_chg_type; + int prev_button_type; + u8 status[2]; + + int irq; + struct work_struct irq_work; + struct mutex mutex; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; + + /* Button of dock device */ + struct input_dev *dock; + + /* + * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB + * h/w path of COMP2/COMN1 on CONTROL1 register. + */ + int path_usb; + int path_uart; +}; + +enum max77693_muic_cable_group { + MAX77693_CABLE_GROUP_ADC = 0, + MAX77693_CABLE_GROUP_ADC_GND, + MAX77693_CABLE_GROUP_CHG, + MAX77693_CABLE_GROUP_VBVOLT, +}; + +enum max77693_muic_charger_type { + MAX77693_CHARGER_TYPE_NONE = 0, + MAX77693_CHARGER_TYPE_USB, + MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, + MAX77693_CHARGER_TYPE_DEDICATED_CHG, + MAX77693_CHARGER_TYPE_APPLE_500MA, + MAX77693_CHARGER_TYPE_APPLE_1A_2A, + MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, +}; + +/** + * struct max77693_muic_irq + * @irq: the index of irq list of MUIC device. + * @name: the name of irq. + * @virq: the virtual irq to use irq domain + */ +struct max77693_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +static struct max77693_muic_irq muic_irqs[] = { + { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, + { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, + { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, + { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, + { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, + { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, + { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, + { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, + { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, + { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, + { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, + { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, + { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, + { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, + { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, + { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, +}; + +/* Define supported accessory type */ +enum max77693_muic_acc_type { + MAX77693_MUIC_ADC_GROUND = 0x0, + MAX77693_MUIC_ADC_SEND_END_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, + MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, + MAX77693_MUIC_ADC_RESERVED_ACC_1, + MAX77693_MUIC_ADC_RESERVED_ACC_2, + MAX77693_MUIC_ADC_RESERVED_ACC_3, + MAX77693_MUIC_ADC_RESERVED_ACC_4, + MAX77693_MUIC_ADC_RESERVED_ACC_5, + MAX77693_MUIC_ADC_CEA936_AUDIO, + MAX77693_MUIC_ADC_PHONE_POWERED_DEV, + MAX77693_MUIC_ADC_TTY_CONVERTER, + MAX77693_MUIC_ADC_UART_CABLE, + MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, + MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, + MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, + MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, + MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, + MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, + MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, + MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, + MAX77693_MUIC_ADC_OPEN, + + /* + * The below accessories have same ADC value so ADCLow and + * ADC1K bit is used to separate specific accessory. + */ + /* ADC|VBVolot|ADCLow|ADC1K| */ + MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ + MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ + MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ + MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ + MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ +}; + +/* + * MAX77693 MUIC device support below list of accessories(external connector) + */ +static const unsigned int max77693_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_CHG_USB_CDP, + EXTCON_DISP_MHL, + EXTCON_JIG, + EXTCON_DOCK, + EXTCON_NONE, +}; + +/* + * max77693_muic_set_debounce_time - Set the debounce time of ADC + * @info: the instance including private data of max77693 MUIC + * @time: the debounce time of ADC + */ +static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, + enum max77693_muic_adc_debounce_time time) +{ + int ret; + + switch (time) { + case ADC_DEBOUNCE_TIME_5MS: + case ADC_DEBOUNCE_TIME_10MS: + case ADC_DEBOUNCE_TIME_25MS: + case ADC_DEBOUNCE_TIME_38_62MS: + /* + * Don't touch BTLDset, JIGset when you want to change adc + * debounce time. If it writes other than 0 to BTLDset, JIGset + * muic device will be reset and loose current state. + */ + ret = regmap_write(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL3, + time << MAX77693_CONTROL3_ADCDBSET_SHIFT); + if (ret) { + dev_err(info->dev, "failed to set ADC debounce time\n"); + return ret; + } + break; + default: + dev_err(info->dev, "invalid ADC debounce time\n"); + return -EINVAL; + } + + return 0; +}; + +/* + * max77693_muic_set_path - Set hardware line according to attached cable + * @info: the instance including private data of max77693 MUIC + * @value: the path according to attached cable + * @attached: the state of cable (true:attached, false:detached) + * + * The max77693 MUIC device share outside H/W line among a varity of cables + * so, this function set internal path of H/W line according to the type of + * attached cable. + */ +static int max77693_muic_set_path(struct max77693_muic_info *info, + u8 val, bool attached) +{ + int ret; + unsigned int ctrl1, ctrl2 = 0; + + if (attached) + ctrl1 = val; + else + ctrl1 = MAX77693_CONTROL1_SW_OPEN; + + ret = regmap_update_bits(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + if (attached) + ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ + else + ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ + + ret = regmap_update_bits(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL2, + MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, + ctrl2); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + dev_info(info->dev, + "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", + ctrl1, ctrl2, attached ? "attached" : "detached"); + + return 0; +} + +/* + * max77693_muic_get_cable_type - Return cable type and check cable state + * @info: the instance including private data of max77693 MUIC + * @group: the path according to attached cable + * @attached: store cable state and return + * + * This function check the cable state either attached or detached, + * and then divide precise type of cable according to cable group. + * - MAX77693_CABLE_GROUP_ADC + * - MAX77693_CABLE_GROUP_ADC_GND + * - MAX77693_CABLE_GROUP_CHG + * - MAX77693_CABLE_GROUP_VBVOLT + */ +static int max77693_muic_get_cable_type(struct max77693_muic_info *info, + enum max77693_muic_cable_group group, bool *attached) +{ + int cable_type = 0; + int adc; + int adc1k; + int adclow; + int vbvolt; + int chg_type; + + switch (group) { + case MAX77693_CABLE_GROUP_ADC: + /* + * Read ADC value to check cable type and decide cable state + * according to cable type + */ + adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; + adc >>= MAX77693_STATUS1_ADC_SHIFT; + + /* + * Check current cable state/cable type and store cable type + * (info->prev_cable_type) for handling cable when cable is + * detached. + */ + if (adc == MAX77693_MUIC_ADC_OPEN) { + *attached = false; + + cable_type = info->prev_cable_type; + info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; + } else { + *attached = true; + + cable_type = info->prev_cable_type = adc; + } + break; + case MAX77693_CABLE_GROUP_ADC_GND: + /* + * Read ADC value to check cable type and decide cable state + * according to cable type + */ + adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; + adc >>= MAX77693_STATUS1_ADC_SHIFT; + + /* + * Check current cable state/cable type and store cable type + * (info->prev_cable_type/_gnd) for handling cable when cable + * is detached. + */ + if (adc == MAX77693_MUIC_ADC_OPEN) { + *attached = false; + + cable_type = info->prev_cable_type_gnd; + info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; + } else { + *attached = true; + + adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; + adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; + adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; + adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; + + vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; + vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; + + /** + * [0x1|VBVolt|ADCLow|ADC1K] + * [0x1| 0| 0| 0] USB_HOST + * [0x1| 1| 0| 0] USB_HSOT_VB + * [0x1| 0| 1| 0] Audio Video cable with load + * [0x1| 0| 1| 1] MHL without charging cable + * [0x1| 1| 1| 1] MHL with charging cable + */ + cable_type = ((0x1 << 8) + | (vbvolt << 2) + | (adclow << 1) + | adc1k); + + info->prev_cable_type = adc; + info->prev_cable_type_gnd = cable_type; + } + + break; + case MAX77693_CABLE_GROUP_CHG: + /* + * Read charger type to check cable type and decide cable state + * according to type of charger cable. + */ + chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; + chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; + + if (chg_type == MAX77693_CHARGER_TYPE_NONE) { + *attached = false; + + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; + } else { + *attached = true; + + /* + * Check current cable state/cable type and store cable + * type(info->prev_chg_type) for handling cable when + * charger cable is detached. + */ + cable_type = info->prev_chg_type = chg_type; + } + + break; + case MAX77693_CABLE_GROUP_VBVOLT: + /* + * Read ADC value to check cable type and decide cable state + * according to cable type + */ + adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; + adc >>= MAX77693_STATUS1_ADC_SHIFT; + chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; + chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; + + if (adc == MAX77693_MUIC_ADC_OPEN + && chg_type == MAX77693_CHARGER_TYPE_NONE) + *attached = false; + else + *attached = true; + + /* + * Read vbvolt field, if vbvolt is 1, + * this cable is used for charging. + */ + vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; + vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; + + cable_type = vbvolt; + break; + default: + dev_err(info->dev, "Unknown cable group (%d)\n", group); + cable_type = -EINVAL; + break; + } + + return cable_type; +} + +static int max77693_muic_dock_handler(struct max77693_muic_info *info, + int cable_type, bool attached) +{ + int ret = 0; + int vbvolt; + bool cable_attached; + unsigned int dock_id; + + dev_info(info->dev, + "external connector is %s (adc:0x%02x)\n", + attached ? "attached" : "detached", cable_type); + + switch (cable_type) { + case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ + /* + * Check power cable whether attached or detached state. + * The Dock-Smart device need surely external power supply. + * If power cable(USB/TA) isn't connected to Dock device, + * user can't use Dock-Smart for desktop mode. + */ + vbvolt = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); + if (attached && !vbvolt) { + dev_warn(info->dev, + "Cannot detect external power supply\n"); + return 0; + } + + /* + * Notify Dock/MHL state. + * - Dock device include three type of cable which + * are HDMI, USB for mouse/keyboard and micro-usb port + * for USB/TA cable. Dock device need always exteranl + * power supply(USB/TA cable through micro-usb cable). Dock + * device support screen output of target to separate + * monitor and mouse/keyboard for desktop mode. + * + * Features of 'USB/TA cable with Dock device' + * - Support MHL + * - Support external output feature of audio + * - Support charging through micro-usb port without data + * connection if TA cable is connected to target. + * - Support charging and data connection through micro-usb port + * if USB cable is connected between target and host + * device. + * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) + */ + ret = max77693_muic_set_path(info, info->path_usb, attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); + goto out; + case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ + dock_id = EXTCON_DOCK; + break; + case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ + dock_id = EXTCON_DOCK; + if (!attached) { + extcon_set_state_sync(info->edev, EXTCON_USB, false); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + false); + } + break; + default: + dev_err(info->dev, "failed to detect %s dock device\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + /* Dock-Car/Desk/Audio, PATH:AUDIO */ + ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, + attached); + if (ret < 0) + return ret; + extcon_set_state_sync(info->edev, dock_id, attached); + +out: + return 0; +} + +static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, + int button_type, bool attached) +{ + struct input_dev *dock = info->dock; + unsigned int code; + + switch (button_type) { + case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1 + ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1: + /* DOCK_KEY_PREV */ + code = KEY_PREVIOUSSONG; + break; + case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1 + ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1: + /* DOCK_KEY_NEXT */ + code = KEY_NEXTSONG; + break; + case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: + /* DOCK_VOL_DOWN */ + code = KEY_VOLUMEDOWN; + break; + case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: + /* DOCK_VOL_UP */ + code = KEY_VOLUMEUP; + break; + case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1 + ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1: + /* DOCK_KEY_PLAY_PAUSE */ + code = KEY_PLAYPAUSE; + break; + default: + dev_err(info->dev, + "failed to detect %s key (adc:0x%x)\n", + attached ? "pressed" : "released", button_type); + return -EINVAL; + } + + input_event(dock, EV_KEY, code, attached); + input_sync(dock); + + return 0; +} + +static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) +{ + int cable_type_gnd; + int ret = 0; + bool attached; + + cable_type_gnd = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_ADC_GND, &attached); + + switch (cable_type_gnd) { + case MAX77693_MUIC_GND_USB_HOST: + case MAX77693_MUIC_GND_USB_HOST_VB: + /* USB_HOST, PATH: AP_USB */ + ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB, + attached); + if (ret < 0) + return ret; + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); + break; + case MAX77693_MUIC_GND_AV_CABLE_LOAD: + /* Audio Video Cable with load, PATH:AUDIO */ + ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, + attached); + if (ret < 0) + return ret; + extcon_set_state_sync(info->edev, EXTCON_USB, attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + break; + case MAX77693_MUIC_GND_MHL: + case MAX77693_MUIC_GND_MHL_VB: + /* MHL or MHL with USB/TA cable */ + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); + break; + default: + dev_err(info->dev, "failed to detect %s cable of gnd type\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + return 0; +} + +static int max77693_muic_jig_handler(struct max77693_muic_info *info, + int cable_type, bool attached) +{ + int ret = 0; + u8 path = MAX77693_CONTROL1_SW_OPEN; + + dev_info(info->dev, + "external connector is %s (adc:0x%02x)\n", + attached ? "attached" : "detached", cable_type); + + switch (cable_type) { + case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ + case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ + /* PATH:AP_USB */ + path = MAX77693_CONTROL1_SW_USB; + break; + case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ + case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */ + /* PATH:AP_UART */ + path = MAX77693_CONTROL1_SW_UART; + break; + default: + dev_err(info->dev, "failed to detect %s jig cable\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + ret = max77693_muic_set_path(info, path, attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_JIG, attached); + + return 0; +} + +static int max77693_muic_adc_handler(struct max77693_muic_info *info) +{ + int cable_type; + int button_type; + bool attached; + int ret = 0; + + /* Check accessory state which is either detached or attached */ + cable_type = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_ADC, &attached); + + dev_info(info->dev, + "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", + attached ? "attached" : "detached", cable_type, + info->prev_cable_type); + + switch (cable_type) { + case MAX77693_MUIC_ADC_GROUND: + /* USB_HOST/MHL/Audio */ + max77693_muic_adc_ground_handler(info); + break; + case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: + case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: + case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: + case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: + /* JIG */ + ret = max77693_muic_jig_handler(info, cable_type, attached); + if (ret < 0) + return ret; + break; + case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ + case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ + case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ + /* + * DOCK device + * + * The MAX77693 MUIC device can detect total 34 cable type + * except of charger cable and MUIC device didn't define + * specfic role of cable in the range of from 0x01 to 0x12 + * of ADC value. So, can use/define cable with no role according + * to schema of hardware board. + */ + ret = max77693_muic_dock_handler(info, cable_type, attached); + if (ret < 0) + return ret; + break; + case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */ + case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */ + case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */ + case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */ + case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */ + /* + * Button of DOCK device + * - the Prev/Next/Volume Up/Volume Down/Play-Pause button + * + * The MAX77693 MUIC device can detect total 34 cable type + * except of charger cable and MUIC device didn't define + * specfic role of cable in the range of from 0x01 to 0x12 + * of ADC value. So, can use/define cable with no role according + * to schema of hardware board. + */ + if (attached) + button_type = info->prev_button_type = cable_type; + else + button_type = info->prev_button_type; + + ret = max77693_muic_dock_button_handler(info, button_type, + attached); + if (ret < 0) + return ret; + break; + case MAX77693_MUIC_ADC_SEND_END_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: + case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: + case MAX77693_MUIC_ADC_RESERVED_ACC_1: + case MAX77693_MUIC_ADC_RESERVED_ACC_2: + case MAX77693_MUIC_ADC_RESERVED_ACC_4: + case MAX77693_MUIC_ADC_RESERVED_ACC_5: + case MAX77693_MUIC_ADC_CEA936_AUDIO: + case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: + case MAX77693_MUIC_ADC_TTY_CONVERTER: + case MAX77693_MUIC_ADC_UART_CABLE: + case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: + case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: + /* + * This accessory isn't used in general case if it is specially + * needed to detect additional accessory, should implement + * proper operation when this accessory is attached/detached. + */ + dev_info(info->dev, + "accessory is %s but it isn't used (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EAGAIN; + default: + dev_err(info->dev, + "failed to detect %s accessory (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EINVAL; + } + + return 0; +} + +static int max77693_muic_chg_handler(struct max77693_muic_info *info) +{ + int chg_type; + int cable_type_gnd; + int cable_type; + bool attached; + bool cable_attached; + int ret = 0; + + chg_type = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_CHG, &attached); + + dev_info(info->dev, + "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", + attached ? "attached" : "detached", + chg_type, info->prev_chg_type); + + switch (chg_type) { + case MAX77693_CHARGER_TYPE_USB: + case MAX77693_CHARGER_TYPE_DEDICATED_CHG: + case MAX77693_CHARGER_TYPE_NONE: + /* Check MAX77693_CABLE_GROUP_ADC_GND type */ + cable_type_gnd = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_ADC_GND, + &cable_attached); + switch (cable_type_gnd) { + case MAX77693_MUIC_GND_MHL: + case MAX77693_MUIC_GND_MHL_VB: + /* + * MHL cable with USB/TA cable + * - MHL cable include two port(HDMI line and separate + * micro-usb port. When the target connect MHL cable, + * extcon driver check whether USB/TA cable is + * connected. If USB/TA cable is connected, extcon + * driver notify state to notifiee for charging battery. + * + * Features of 'USB/TA with MHL cable' + * - Support MHL + * - Support charging through micro-usb port without + * data connection + */ + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + attached); + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, + cable_attached); + break; + } + + /* Check MAX77693_CABLE_GROUP_ADC type */ + cable_type = max77693_muic_get_cable_type(info, + MAX77693_CABLE_GROUP_ADC, + &cable_attached); + switch (cable_type) { + case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ + /* + * Dock-Audio device with USB/TA cable + * - Dock device include two port(Dock-Audio and micro- + * usb port). When the target connect Dock-Audio device, + * extcon driver check whether USB/TA cable is connected + * or not. If USB/TA cable is connected, extcon driver + * notify state to notifiee for charging battery. + * + * Features of 'USB/TA cable with Dock-Audio device' + * - Support external output feature of audio. + * - Support charging through micro-usb port without + * data connection. + */ + extcon_set_state_sync(info->edev, EXTCON_USB, + attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + + if (!cable_attached) + extcon_set_state_sync(info->edev, EXTCON_DOCK, + cable_attached); + break; + case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ + /* + * Dock-Smart device with USB/TA cable + * - Dock-Desk device include three type of cable which + * are HDMI, USB for mouse/keyboard and micro-usb port + * for USB/TA cable. Dock-Smart device need always + * exteranl power supply(USB/TA cable through micro-usb + * cable). Dock-Smart device support screen output of + * target to separate monitor and mouse/keyboard for + * desktop mode. + * + * Features of 'USB/TA cable with Dock-Smart device' + * - Support MHL + * - Support external output feature of audio + * - Support charging through micro-usb port without + * data connection if TA cable is connected to target. + * - Support charging and data connection through micro- + * usb port if USB cable is connected between target + * and host device + * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) + */ + ret = max77693_muic_set_path(info, info->path_usb, + attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_DOCK, + attached); + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, + attached); + break; + } + + /* Check MAX77693_CABLE_GROUP_CHG type */ + switch (chg_type) { + case MAX77693_CHARGER_TYPE_NONE: + /* + * When MHL(with USB/TA cable) or Dock-Audio with USB/TA + * cable is attached, muic device happen below two irq. + * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting + * MHL/Dock-Audio. + * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting + * USB/TA cable connected to MHL or Dock-Audio. + * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC + * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq. + * + * If user attach MHL (with USB/TA cable and immediately + * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ + * _INT2_CHGTYP irq is happened, USB/TA cable remain + * connected state to target. But USB/TA cable isn't + * connected to target. The user be face with unusual + * action. So, driver should check this situation in + * spite of, that previous charger type is N/A. + */ + break; + case MAX77693_CHARGER_TYPE_USB: + /* Only USB cable, PATH:AP_USB */ + ret = max77693_muic_set_path(info, info->path_usb, + attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_USB, + attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + break; + case MAX77693_CHARGER_TYPE_DEDICATED_CHG: + /* Only TA cable */ + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + attached); + break; + } + break; + case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, + attached); + break; + case MAX77693_CHARGER_TYPE_APPLE_500MA: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, + attached); + break; + case MAX77693_CHARGER_TYPE_APPLE_1A_2A: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, + attached); + break; + case MAX77693_CHARGER_TYPE_DEAD_BATTERY: + break; + default: + dev_err(info->dev, + "failed to detect %s accessory (chg_type:0x%x)\n", + attached ? "attached" : "detached", chg_type); + return -EINVAL; + } + + return 0; +} + +static void max77693_muic_irq_work(struct work_struct *work) +{ + struct max77693_muic_info *info = container_of(work, + struct max77693_muic_info, irq_work); + int irq_type = -1; + int i, ret = 0; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) + if (info->irq == muic_irqs[i].virq) + irq_type = muic_irqs[i].irq; + + ret = regmap_bulk_read(info->max77693->regmap_muic, + MAX77693_MUIC_REG_STATUS1, info->status, 2); + if (ret) { + dev_err(info->dev, "failed to read MUIC register\n"); + mutex_unlock(&info->mutex); + return; + } + + switch (irq_type) { + case MAX77693_MUIC_IRQ_INT1_ADC: + case MAX77693_MUIC_IRQ_INT1_ADC_LOW: + case MAX77693_MUIC_IRQ_INT1_ADC_ERR: + case MAX77693_MUIC_IRQ_INT1_ADC1K: + /* + * Handle all of accessory except for + * type of charger accessory. + */ + ret = max77693_muic_adc_handler(info); + break; + case MAX77693_MUIC_IRQ_INT2_CHGTYP: + case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: + case MAX77693_MUIC_IRQ_INT2_DCDTMR: + case MAX77693_MUIC_IRQ_INT2_DXOVP: + case MAX77693_MUIC_IRQ_INT2_VBVOLT: + case MAX77693_MUIC_IRQ_INT2_VIDRM: + /* Handle charger accessory */ + ret = max77693_muic_chg_handler(info); + break; + case MAX77693_MUIC_IRQ_INT3_EOC: + case MAX77693_MUIC_IRQ_INT3_CGMBC: + case MAX77693_MUIC_IRQ_INT3_OVP: + case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: + case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: + case MAX77693_MUIC_IRQ_INT3_BAT_DET: + break; + default: + dev_err(info->dev, "muic interrupt: irq %d occurred\n", + irq_type); + mutex_unlock(&info->mutex); + return; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +static irqreturn_t max77693_muic_irq_handler(int irq, void *data) +{ + struct max77693_muic_info *info = data; + + info->irq = irq; + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static const struct regmap_config max77693_muic_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int max77693_muic_detect_accessory(struct max77693_muic_info *info) +{ + int ret = 0; + int adc; + int chg_type; + bool attached; + + mutex_lock(&info->mutex); + + /* Read STATUSx register to detect accessory */ + ret = regmap_bulk_read(info->max77693->regmap_muic, + MAX77693_MUIC_REG_STATUS1, info->status, 2); + if (ret) { + dev_err(info->dev, "failed to read MUIC register\n"); + mutex_unlock(&info->mutex); + return ret; + } + + adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC, + &attached); + if (attached && adc != MAX77693_MUIC_ADC_OPEN) { + ret = max77693_muic_adc_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect accessory\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG, + &attached); + if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) { + ret = max77693_muic_chg_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect charger accessory\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + mutex_unlock(&info->mutex); + + return 0; +} + +static void max77693_muic_detect_cable_wq(struct work_struct *work) +{ + struct max77693_muic_info *info = container_of(to_delayed_work(work), + struct max77693_muic_info, wq_detcable); + + max77693_muic_detect_accessory(info); +} + +static int max77693_muic_probe(struct platform_device *pdev) +{ + struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); + struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev); + struct max77693_muic_info *info; + struct max77693_reg_data *init_data; + int num_init_data; + int delay_jiffies; + int ret; + int i; + unsigned int id; + + info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->max77693 = max77693; + if (info->max77693->regmap_muic) { + dev_dbg(&pdev->dev, "allocate register map\n"); + } else { + info->max77693->regmap_muic = devm_regmap_init_i2c( + info->max77693->i2c_muic, + &max77693_muic_regmap_config); + if (IS_ERR(info->max77693->regmap_muic)) { + ret = PTR_ERR(info->max77693->regmap_muic); + dev_err(max77693->dev, + "failed to allocate register map: %d\n", ret); + return ret; + } + } + + /* Register input device for button of dock device */ + info->dock = devm_input_allocate_device(&pdev->dev); + if (!info->dock) { + dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__); + return -ENOMEM; + } + info->dock->name = "max77693-muic/dock"; + info->dock->phys = "max77693-muic/extcon"; + info->dock->dev.parent = &pdev->dev; + + __set_bit(EV_REP, info->dock->evbit); + + input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP); + input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN); + input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE); + input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG); + input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG); + + ret = input_register_device(info->dock); + if (ret < 0) { + dev_err(&pdev->dev, "Cannot register input device error(%d)\n", + ret); + return ret; + } + + platform_set_drvdata(pdev, info); + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, max77693_muic_irq_work); + + /* Support irq domain for MAX77693 MUIC device */ + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { + struct max77693_muic_irq *muic_irq = &muic_irqs[i]; + int virq; + + virq = regmap_irq_get_virq(max77693->irq_data_muic, + muic_irq->irq); + if (virq <= 0) + return -EINVAL; + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, + max77693_muic_irq_handler, + IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(&pdev->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + return ret; + } + } + + /* Initialize extcon device */ + info->edev = devm_extcon_dev_allocate(&pdev->dev, + max77693_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + return ret; + } + + /* Initialize MUIC register by using platform data or default data */ + if (pdata && pdata->muic_data) { + init_data = pdata->muic_data->init_data; + num_init_data = pdata->muic_data->num_init_data; + } else { + init_data = default_init_data; + num_init_data = ARRAY_SIZE(default_init_data); + } + + for (i = 0; i < num_init_data; i++) { + regmap_write(info->max77693->regmap_muic, + init_data[i].addr, + init_data[i].data); + } + + if (pdata && pdata->muic_data) { + struct max77693_muic_platform_data *muic_pdata + = pdata->muic_data; + + /* + * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB + * h/w path of COMP2/COMN1 on CONTROL1 register. + */ + if (muic_pdata->path_uart) + info->path_uart = muic_pdata->path_uart; + else + info->path_uart = MAX77693_CONTROL1_SW_UART; + + if (muic_pdata->path_usb) + info->path_usb = muic_pdata->path_usb; + else + info->path_usb = MAX77693_CONTROL1_SW_USB; + + /* + * Default delay time for detecting cable state + * after certain time. + */ + if (muic_pdata->detcable_delay_ms) + delay_jiffies = + msecs_to_jiffies(muic_pdata->detcable_delay_ms); + else + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + } else { + info->path_usb = MAX77693_CONTROL1_SW_USB; + info->path_uart = MAX77693_CONTROL1_SW_UART; + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + } + + /* Set initial path for UART */ + max77693_muic_set_path(info, info->path_uart, true); + + /* Check revision number of MUIC device*/ + ret = regmap_read(info->max77693->regmap_muic, + MAX77693_MUIC_REG_ID, &id); + if (ret < 0) { + dev_err(&pdev->dev, "failed to read revision number\n"); + return ret; + } + dev_info(info->dev, "device ID : 0x%x\n", id); + + /* Set ADC debounce time */ + max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + delay_jiffies); + + return ret; +} + +static int max77693_muic_remove(struct platform_device *pdev) +{ + struct max77693_muic_info *info = platform_get_drvdata(pdev); + + cancel_work_sync(&info->irq_work); + input_unregister_device(info->dock); + + return 0; +} + +static struct platform_driver max77693_muic_driver = { + .driver = { + .name = DEV_NAME, + }, + .probe = max77693_muic_probe, + .remove = max77693_muic_remove, +}; + +module_platform_driver(max77693_muic_driver); + +MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:max77693-muic"); diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c new file mode 100644 index 000000000..c9fcd6cd4 --- /dev/null +++ b/drivers/extcon/extcon-max77843.c @@ -0,0 +1,960 @@ +/* + * extcon-max77843.c - Maxim MAX77843 extcon driver to support + * MUIC(Micro USB Interface Controller) + * + * Copyright (C) 2015 Samsung Electronics + * Author: Jaewon Kim <jaewon02.kim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/extcon-provider.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/max77693-common.h> +#include <linux/mfd/max77843-private.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> + +#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ + +enum max77843_muic_status { + MAX77843_MUIC_STATUS1 = 0, + MAX77843_MUIC_STATUS2, + MAX77843_MUIC_STATUS3, + + MAX77843_MUIC_STATUS_NUM, +}; + +struct max77843_muic_info { + struct device *dev; + struct max77693_dev *max77843; + struct extcon_dev *edev; + + struct mutex mutex; + struct work_struct irq_work; + struct delayed_work wq_detcable; + + u8 status[MAX77843_MUIC_STATUS_NUM]; + int prev_cable_type; + int prev_chg_type; + int prev_gnd_type; + + bool irq_adc; + bool irq_chg; +}; + +enum max77843_muic_cable_group { + MAX77843_CABLE_GROUP_ADC = 0, + MAX77843_CABLE_GROUP_ADC_GND, + MAX77843_CABLE_GROUP_CHG, +}; + +enum max77843_muic_adc_debounce_time { + MAX77843_DEBOUNCE_TIME_5MS = 0, + MAX77843_DEBOUNCE_TIME_10MS, + MAX77843_DEBOUNCE_TIME_25MS, + MAX77843_DEBOUNCE_TIME_38_62MS, +}; + +/* Define accessory cable type */ +enum max77843_muic_accessory_type { + MAX77843_MUIC_ADC_GROUND = 0, + MAX77843_MUIC_ADC_SEND_END_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, + MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, + MAX77843_MUIC_ADC_RESERVED_ACC_1, + MAX77843_MUIC_ADC_RESERVED_ACC_2, + MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ + MAX77843_MUIC_ADC_RESERVED_ACC_4, + MAX77843_MUIC_ADC_RESERVED_ACC_5, + MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, + MAX77843_MUIC_ADC_PHONE_POWERED_DEV, + MAX77843_MUIC_ADC_TTY_CONVERTER, + MAX77843_MUIC_ADC_UART_CABLE, + MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, + MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, + MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, + MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, + MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, + MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, + MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, + MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, + MAX77843_MUIC_ADC_OPEN, + + /* + * The below accessories should check + * not only ADC value but also ADC1K and VBVolt value. + */ + /* Offset|ADC1K|VBVolt| */ + MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ + MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ + MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ + MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ +}; + +/* Define charger cable type */ +enum max77843_muic_charger_type { + MAX77843_MUIC_CHG_NONE = 0, + MAX77843_MUIC_CHG_USB, + MAX77843_MUIC_CHG_DOWNSTREAM, + MAX77843_MUIC_CHG_DEDICATED, + MAX77843_MUIC_CHG_SPECIAL_500MA, + MAX77843_MUIC_CHG_SPECIAL_1A, + MAX77843_MUIC_CHG_SPECIAL_BIAS, + MAX77843_MUIC_CHG_RESERVED, + MAX77843_MUIC_CHG_GND, + MAX77843_MUIC_CHG_DOCK, +}; + +static const unsigned int max77843_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_CHG_USB_CDP, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_DISP_MHL, + EXTCON_DOCK, + EXTCON_JIG, + EXTCON_NONE, +}; + +struct max77843_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +static struct max77843_muic_irq max77843_muic_irqs[] = { + { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, + { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, + { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, + { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, + { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, + { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, + { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, + { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, + { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, + { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, + { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, + { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, + { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, + { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, + { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, + { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, +}; + +static const struct regmap_config max77843_muic_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX77843_MUIC_REG_END, +}; + +static const struct regmap_irq max77843_muic_irq[] = { + /* INT1 interrupt */ + { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, + { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, + { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, + + /* INT2 interrupt */ + { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, + { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, + { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, + { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, + { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, + + /* INT3 interrupt */ + { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, + { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, +}; + +static const struct regmap_irq_chip max77843_muic_irq_chip = { + .name = "max77843-muic", + .status_base = MAX77843_MUIC_REG_INT1, + .mask_base = MAX77843_MUIC_REG_INTMASK1, + .mask_invert = true, + .num_regs = 3, + .irqs = max77843_muic_irq, + .num_irqs = ARRAY_SIZE(max77843_muic_irq), +}; + +static int max77843_muic_set_path(struct max77843_muic_info *info, + u8 val, bool attached, bool nobccomp) +{ + struct max77693_dev *max77843 = info->max77843; + int ret = 0; + unsigned int ctrl1, ctrl2; + + if (attached) + ctrl1 = val; + else + ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; + if (nobccomp) { + /* Disable BC1.2 protocol and force manual switch control */ + ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; + } + + ret = regmap_update_bits(max77843->regmap_muic, + MAX77843_MUIC_REG_CONTROL1, + MAX77843_MUIC_CONTROL1_COM_SW | + MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, + ctrl1); + if (ret < 0) { + dev_err(info->dev, "Cannot switch MUIC port\n"); + return ret; + } + + if (attached) + ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; + else + ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; + + ret = regmap_update_bits(max77843->regmap_muic, + MAX77843_MUIC_REG_CONTROL2, + MAX77843_MUIC_CONTROL2_LOWPWR_MASK | + MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); + if (ret < 0) { + dev_err(info->dev, "Cannot update lowpower mode\n"); + return ret; + } + + dev_dbg(info->dev, + "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", + ctrl1, ctrl2, attached ? "attached" : "detached"); + + return 0; +} + +static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, + bool on) +{ + struct max77693_dev *max77843 = info->max77843; + unsigned int cnfg00; + + if (on) + cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; + else + cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; + + regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00, + MAX77843_CHG_MODE_MASK, cnfg00); +} + +static int max77843_muic_get_cable_type(struct max77843_muic_info *info, + enum max77843_muic_cable_group group, bool *attached) +{ + int adc, chg_type, cable_type, gnd_type; + + adc = info->status[MAX77843_MUIC_STATUS1] & + MAX77843_MUIC_STATUS1_ADC_MASK; + adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; + + switch (group) { + case MAX77843_CABLE_GROUP_ADC: + if (adc == MAX77843_MUIC_ADC_OPEN) { + *attached = false; + cable_type = info->prev_cable_type; + info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; + } else { + *attached = true; + cable_type = info->prev_cable_type = adc; + } + break; + case MAX77843_CABLE_GROUP_CHG: + chg_type = info->status[MAX77843_MUIC_STATUS2] & + MAX77843_MUIC_STATUS2_CHGTYP_MASK; + + /* Check GROUND accessory with charger cable */ + if (adc == MAX77843_MUIC_ADC_GROUND) { + if (chg_type == MAX77843_MUIC_CHG_NONE) { + /* + * The following state when charger cable is + * disconnected but the GROUND accessory still + * connected. + */ + *attached = false; + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX77843_MUIC_CHG_NONE; + } else { + + /* + * The following state when charger cable is + * connected on the GROUND accessory. + */ + *attached = true; + cable_type = MAX77843_MUIC_CHG_GND; + info->prev_chg_type = MAX77843_MUIC_CHG_GND; + } + break; + } + + if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ + if (chg_type == MAX77843_MUIC_CHG_NONE) { + *attached = false; + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX77843_MUIC_CHG_NONE; + } else { + *attached = true; + cable_type = MAX77843_MUIC_CHG_DOCK; + info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; + } + break; + } + + if (chg_type == MAX77843_MUIC_CHG_NONE) { + *attached = false; + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX77843_MUIC_CHG_NONE; + } else { + *attached = true; + cable_type = info->prev_chg_type = chg_type; + } + break; + case MAX77843_CABLE_GROUP_ADC_GND: + if (adc == MAX77843_MUIC_ADC_OPEN) { + *attached = false; + cable_type = info->prev_gnd_type; + info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; + } else { + *attached = true; + + /* + * Offset|ADC1K|VBVolt| + * 0x1| 0| 0| USB-HOST + * 0x1| 0| 1| USB-HOST with VB + * 0x1| 1| 0| MHL + * 0x1| 1| 1| MHL with VB + */ + /* Get ADC1K register bit */ + gnd_type = (info->status[MAX77843_MUIC_STATUS1] & + MAX77843_MUIC_STATUS1_ADC1K_MASK); + + /* Get VBVolt register bit */ + gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & + MAX77843_MUIC_STATUS2_VBVOLT_MASK); + gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; + + /* Offset of GND cable */ + gnd_type |= MAX77843_MUIC_GND_USB_HOST; + cable_type = info->prev_gnd_type = gnd_type; + } + break; + default: + dev_err(info->dev, "Unknown cable group (%d)\n", group); + cable_type = -EINVAL; + break; + } + + return cable_type; +} + +static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) +{ + int ret, gnd_cable_type; + bool attached; + + gnd_cable_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_ADC_GND, &attached); + dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", + attached ? "attached" : "detached", gnd_cable_type); + + switch (gnd_cable_type) { + case MAX77843_MUIC_GND_USB_HOST: + case MAX77843_MUIC_GND_USB_HOST_VB: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_USB, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); + max77843_charger_set_otg_vbus(info, attached); + break; + case MAX77843_MUIC_GND_MHL_VB: + case MAX77843_MUIC_GND_MHL: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); + break; + default: + dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", + attached ? "attached" : "detached", gnd_cable_type); + return -EINVAL; + } + + return 0; +} + +static int max77843_muic_jig_handler(struct max77843_muic_info *info, + int cable_type, bool attached) +{ + int ret; + u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; + + dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", + attached ? "attached" : "detached", cable_type); + + switch (cable_type) { + case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: + case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: + path = MAX77843_MUIC_CONTROL1_SW_USB; + break; + case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: + path = MAX77843_MUIC_CONTROL1_SW_UART; + break; + default: + return -EINVAL; + } + + ret = max77843_muic_set_path(info, path, attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_JIG, attached); + + return 0; +} + +static int max77843_muic_dock_handler(struct max77843_muic_info *info, + bool attached) +{ + int ret; + + dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n", + attached ? "attached" : "detached"); + + ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, + attached, attached); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); + extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); + + return 0; +} + +static int max77843_muic_adc_handler(struct max77843_muic_info *info) +{ + int ret, cable_type; + bool attached; + + cable_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_ADC, &attached); + + dev_dbg(info->dev, + "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", + attached ? "attached" : "detached", cable_type, + info->prev_cable_type); + + switch (cable_type) { + case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ + ret = max77843_muic_dock_handler(info, attached); + if (ret < 0) + return ret; + break; + case MAX77843_MUIC_ADC_GROUND: + ret = max77843_muic_adc_gnd_handler(info); + if (ret < 0) + return ret; + break; + case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: + case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: + case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: + ret = max77843_muic_jig_handler(info, cable_type, attached); + if (ret < 0) + return ret; + break; + case MAX77843_MUIC_ADC_SEND_END_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: + case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: + case MAX77843_MUIC_ADC_RESERVED_ACC_1: + case MAX77843_MUIC_ADC_RESERVED_ACC_2: + case MAX77843_MUIC_ADC_RESERVED_ACC_4: + case MAX77843_MUIC_ADC_RESERVED_ACC_5: + case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: + case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: + case MAX77843_MUIC_ADC_TTY_CONVERTER: + case MAX77843_MUIC_ADC_UART_CABLE: + case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: + case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: + case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: + case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: + case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: + case MAX77843_MUIC_ADC_OPEN: + dev_err(info->dev, + "accessory is %s but it isn't used (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EAGAIN; + default: + dev_err(info->dev, + "failed to detect %s accessory (adc:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EINVAL; + } + + return 0; +} + +static int max77843_muic_chg_handler(struct max77843_muic_info *info) +{ + int ret, chg_type, gnd_type; + bool attached; + + chg_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_CHG, &attached); + + dev_dbg(info->dev, + "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", + attached ? "attached" : "detached", + chg_type, info->prev_chg_type); + + switch (chg_type) { + case MAX77843_MUIC_CHG_USB: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_USB, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_USB, attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + break; + case MAX77843_MUIC_CHG_DOWNSTREAM: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, + attached); + break; + case MAX77843_MUIC_CHG_DEDICATED: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + attached); + break; + case MAX77843_MUIC_CHG_SPECIAL_500MA: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, + attached); + break; + case MAX77843_MUIC_CHG_SPECIAL_1A: + ret = max77843_muic_set_path(info, + MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + if (ret < 0) + return ret; + + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, + attached); + break; + case MAX77843_MUIC_CHG_GND: + gnd_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_ADC_GND, &attached); + + /* Charger cable on MHL accessory is attach or detach */ + if (gnd_type == MAX77843_MUIC_GND_MHL_VB) + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + true); + else if (gnd_type == MAX77843_MUIC_GND_MHL) + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + false); + break; + case MAX77843_MUIC_CHG_DOCK: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); + break; + case MAX77843_MUIC_CHG_NONE: + break; + default: + dev_err(info->dev, + "failed to detect %s accessory (chg_type:0x%x)\n", + attached ? "attached" : "detached", chg_type); + + max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, + attached, false); + return -EINVAL; + } + + return 0; +} + +static void max77843_muic_irq_work(struct work_struct *work) +{ + struct max77843_muic_info *info = container_of(work, + struct max77843_muic_info, irq_work); + struct max77693_dev *max77843 = info->max77843; + int ret = 0; + + mutex_lock(&info->mutex); + + ret = regmap_bulk_read(max77843->regmap_muic, + MAX77843_MUIC_REG_STATUS1, info->status, + MAX77843_MUIC_STATUS_NUM); + if (ret) { + dev_err(info->dev, "Cannot read STATUS registers\n"); + mutex_unlock(&info->mutex); + return; + } + + if (info->irq_adc) { + ret = max77843_muic_adc_handler(info); + if (ret) + dev_err(info->dev, "Unknown cable type\n"); + info->irq_adc = false; + } + + if (info->irq_chg) { + ret = max77843_muic_chg_handler(info); + if (ret) + dev_err(info->dev, "Unknown charger type\n"); + info->irq_chg = false; + } + + mutex_unlock(&info->mutex); +} + +static irqreturn_t max77843_muic_irq_handler(int irq, void *data) +{ + struct max77843_muic_info *info = data; + int i, irq_type = -1; + + for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) + if (irq == max77843_muic_irqs[i].virq) + irq_type = max77843_muic_irqs[i].irq; + + switch (irq_type) { + case MAX77843_MUIC_IRQ_INT1_ADC: + case MAX77843_MUIC_IRQ_INT1_ADCERROR: + case MAX77843_MUIC_IRQ_INT1_ADC1K: + info->irq_adc = true; + break; + case MAX77843_MUIC_IRQ_INT2_CHGTYP: + case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: + case MAX77843_MUIC_IRQ_INT2_DCDTMR: + case MAX77843_MUIC_IRQ_INT2_DXOVP: + case MAX77843_MUIC_IRQ_INT2_VBVOLT: + info->irq_chg = true; + break; + case MAX77843_MUIC_IRQ_INT3_VBADC: + case MAX77843_MUIC_IRQ_INT3_VDNMON: + case MAX77843_MUIC_IRQ_INT3_DNRES: + case MAX77843_MUIC_IRQ_INT3_MPNACK: + case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: + case MAX77843_MUIC_IRQ_INT3_MRXTRF: + case MAX77843_MUIC_IRQ_INT3_MRXPERR: + case MAX77843_MUIC_IRQ_INT3_MRXRDY: + break; + default: + dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); + break; + } + + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static void max77843_muic_detect_cable_wq(struct work_struct *work) +{ + struct max77843_muic_info *info = container_of(to_delayed_work(work), + struct max77843_muic_info, wq_detcable); + struct max77693_dev *max77843 = info->max77843; + int chg_type, adc, ret; + bool attached; + + mutex_lock(&info->mutex); + + ret = regmap_bulk_read(max77843->regmap_muic, + MAX77843_MUIC_REG_STATUS1, info->status, + MAX77843_MUIC_STATUS_NUM); + if (ret) { + dev_err(info->dev, "Cannot read STATUS registers\n"); + goto err_cable_wq; + } + + adc = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_ADC, &attached); + if (attached && adc != MAX77843_MUIC_ADC_OPEN) { + ret = max77843_muic_adc_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect accessory\n"); + goto err_cable_wq; + } + } + + chg_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_CHG, &attached); + if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { + ret = max77843_muic_chg_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect charger accessory\n"); + goto err_cable_wq; + } + } + +err_cable_wq: + mutex_unlock(&info->mutex); +} + +static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, + enum max77843_muic_adc_debounce_time time) +{ + struct max77693_dev *max77843 = info->max77843; + int ret; + + switch (time) { + case MAX77843_DEBOUNCE_TIME_5MS: + case MAX77843_DEBOUNCE_TIME_10MS: + case MAX77843_DEBOUNCE_TIME_25MS: + case MAX77843_DEBOUNCE_TIME_38_62MS: + ret = regmap_update_bits(max77843->regmap_muic, + MAX77843_MUIC_REG_CONTROL4, + MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, + time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); + if (ret < 0) { + dev_err(info->dev, "Cannot write MUIC regmap\n"); + return ret; + } + break; + default: + dev_err(info->dev, "Invalid ADC debounce time\n"); + return -EINVAL; + } + + return 0; +} + +static int max77843_init_muic_regmap(struct max77693_dev *max77843) +{ + int ret; + + max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, + I2C_ADDR_MUIC); + if (!max77843->i2c_muic) { + dev_err(&max77843->i2c->dev, + "Cannot allocate I2C device for MUIC\n"); + return -ENOMEM; + } + + i2c_set_clientdata(max77843->i2c_muic, max77843); + + max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, + &max77843_muic_regmap_config); + if (IS_ERR(max77843->regmap_muic)) { + ret = PTR_ERR(max77843->regmap_muic); + goto err_muic_i2c; + } + + ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, + 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); + if (ret < 0) { + dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); + goto err_muic_i2c; + } + + return 0; + +err_muic_i2c: + i2c_unregister_device(max77843->i2c_muic); + + return ret; +} + +static int max77843_muic_probe(struct platform_device *pdev) +{ + struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); + struct max77843_muic_info *info; + unsigned int id; + int i, ret; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->max77843 = max77843; + + platform_set_drvdata(pdev, info); + mutex_init(&info->mutex); + + /* Initialize i2c and regmap */ + ret = max77843_init_muic_regmap(max77843); + if (ret) { + dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); + return ret; + } + + /* Turn off auto detection configuration */ + ret = regmap_update_bits(max77843->regmap_muic, + MAX77843_MUIC_REG_CONTROL4, + MAX77843_MUIC_CONTROL4_USBAUTO_MASK | + MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, + CONTROL4_AUTO_DISABLE); + + /* Initialize extcon device */ + info->edev = devm_extcon_dev_allocate(&pdev->dev, + max77843_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); + ret = -ENODEV; + goto err_muic_irq; + } + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "Failed to register extcon device\n"); + goto err_muic_irq; + } + + /* Set ADC debounce time */ + max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); + + /* Set initial path for UART */ + max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true, + false); + + /* Check revision number of MUIC device */ + ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read revision number\n"); + goto err_muic_irq; + } + dev_info(info->dev, "MUIC device ID : 0x%x\n", id); + + /* Support virtual irq domain for max77843 MUIC device */ + INIT_WORK(&info->irq_work, max77843_muic_irq_work); + + /* Clear IRQ bits before request IRQs */ + ret = regmap_bulk_read(max77843->regmap_muic, + MAX77843_MUIC_REG_INT1, info->status, + MAX77843_MUIC_STATUS_NUM); + if (ret) { + dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); + goto err_muic_irq; + } + + for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { + struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; + int virq = 0; + + virq = regmap_irq_get_virq(max77843->irq_data_muic, + muic_irq->irq); + if (virq <= 0) { + ret = -EINVAL; + goto err_muic_irq; + } + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, + max77843_muic_irq_handler, IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(&pdev->dev, + "Failed to request irq (IRQ: %d, error: %d)\n", + muic_irq->irq, ret); + goto err_muic_irq; + } + } + + /* Detect accessory after completing the initialization of platform */ + INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, + &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); + + return 0; + +err_muic_irq: + regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); + i2c_unregister_device(max77843->i2c_muic); + + return ret; +} + +static int max77843_muic_remove(struct platform_device *pdev) +{ + struct max77843_muic_info *info = platform_get_drvdata(pdev); + struct max77693_dev *max77843 = info->max77843; + + cancel_work_sync(&info->irq_work); + regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); + i2c_unregister_device(max77843->i2c_muic); + + return 0; +} + +static const struct platform_device_id max77843_muic_id[] = { + { "max77843-muic", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(platform, max77843_muic_id); + +static struct platform_driver max77843_muic_driver = { + .driver = { + .name = "max77843-muic", + }, + .probe = max77843_muic_probe, + .remove = max77843_muic_remove, + .id_table = max77843_muic_id, +}; + +static int __init max77843_muic_init(void) +{ + return platform_driver_register(&max77843_muic_driver); +} +subsys_initcall(max77843_muic_init); + +MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c new file mode 100644 index 000000000..98285eb8d --- /dev/null +++ b/drivers/extcon/extcon-max8997.c @@ -0,0 +1,786 @@ +/* + * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC + * + * Copyright (C) 2012 Samsung Electronics + * Donggeun Kim <dg77.kim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/kobject.h> +#include <linux/mfd/max8997.h> +#include <linux/mfd/max8997-private.h> +#include <linux/extcon-provider.h> +#include <linux/irqdomain.h> + +#define DEV_NAME "max8997-muic" +#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ + +enum max8997_muic_adc_debounce_time { + ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ + ADC_DEBOUNCE_TIME_10MS, /* 10ms */ + ADC_DEBOUNCE_TIME_25MS, /* 25ms */ + ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */ +}; + +struct max8997_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +static struct max8997_muic_irq muic_irqs[] = { + { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" }, + { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" }, + { MAX8997_MUICIRQ_ADC, "muic-ADC" }, + { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" }, + { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" }, + { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" }, + { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" }, + { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" }, + { MAX8997_MUICIRQ_OVP, "muic-OVP" }, +}; + +/* Define supported cable type */ +enum max8997_muic_acc_type { + MAX8997_MUIC_ADC_GROUND = 0x0, + MAX8997_MUIC_ADC_MHL, /* MHL*/ + MAX8997_MUIC_ADC_REMOTE_S1_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S2_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S3_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S4_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S5_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S6_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S7_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S8_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S9_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S10_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S11_BUTTON, + MAX8997_MUIC_ADC_REMOTE_S12_BUTTON, + MAX8997_MUIC_ADC_RESERVED_ACC_1, + MAX8997_MUIC_ADC_RESERVED_ACC_2, + MAX8997_MUIC_ADC_RESERVED_ACC_3, + MAX8997_MUIC_ADC_RESERVED_ACC_4, + MAX8997_MUIC_ADC_RESERVED_ACC_5, + MAX8997_MUIC_ADC_CEA936_AUDIO, + MAX8997_MUIC_ADC_PHONE_POWERED_DEV, + MAX8997_MUIC_ADC_TTY_CONVERTER, + MAX8997_MUIC_ADC_UART_CABLE, + MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG, + MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */ + MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */ + MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */ + MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG, + MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */ + MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */ + MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE, + MAX8997_MUIC_ADC_OPEN, /* OPEN */ +}; + +enum max8997_muic_cable_group { + MAX8997_CABLE_GROUP_ADC = 0, + MAX8997_CABLE_GROUP_ADC_GND, + MAX8997_CABLE_GROUP_CHG, + MAX8997_CABLE_GROUP_VBVOLT, +}; + +enum max8997_muic_usb_type { + MAX8997_USB_HOST, + MAX8997_USB_DEVICE, +}; + +enum max8997_muic_charger_type { + MAX8997_CHARGER_TYPE_NONE = 0, + MAX8997_CHARGER_TYPE_USB, + MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT, + MAX8997_CHARGER_TYPE_DEDICATED_CHG, + MAX8997_CHARGER_TYPE_500MA, + MAX8997_CHARGER_TYPE_1A, + MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7, +}; + +struct max8997_muic_info { + struct device *dev; + struct i2c_client *muic; + struct extcon_dev *edev; + int prev_cable_type; + int prev_chg_type; + u8 status[2]; + + int irq; + struct work_struct irq_work; + struct mutex mutex; + + struct max8997_muic_platform_data *muic_pdata; + enum max8997_muic_charger_type pre_charger_type; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; + + /* + * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB + * h/w path of COMP2/COMN1 on CONTROL1 register. + */ + int path_usb; + int path_uart; +}; + +static const unsigned int max8997_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_CHG_USB_CDP, + EXTCON_DISP_MHL, + EXTCON_DOCK, + EXTCON_JIG, + EXTCON_NONE, +}; + +/* + * max8997_muic_set_debounce_time - Set the debounce time of ADC + * @info: the instance including private data of max8997 MUIC + * @time: the debounce time of ADC + */ +static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, + enum max8997_muic_adc_debounce_time time) +{ + int ret; + + switch (time) { + case ADC_DEBOUNCE_TIME_0_5MS: + case ADC_DEBOUNCE_TIME_10MS: + case ADC_DEBOUNCE_TIME_25MS: + case ADC_DEBOUNCE_TIME_38_62MS: + ret = max8997_update_reg(info->muic, + MAX8997_MUIC_REG_CONTROL3, + time << CONTROL3_ADCDBSET_SHIFT, + CONTROL3_ADCDBSET_MASK); + if (ret) { + dev_err(info->dev, "failed to set ADC debounce time\n"); + return ret; + } + break; + default: + dev_err(info->dev, "invalid ADC debounce time\n"); + return -EINVAL; + } + + return 0; +}; + +/* + * max8997_muic_set_path - Set hardware line according to attached cable + * @info: the instance including private data of max8997 MUIC + * @value: the path according to attached cable + * @attached: the state of cable (true:attached, false:detached) + * + * The max8997 MUIC device share outside H/W line among a varity of cables, + * so this function set internal path of H/W line according to the type of + * attached cable. + */ +static int max8997_muic_set_path(struct max8997_muic_info *info, + u8 val, bool attached) +{ + int ret; + u8 ctrl1, ctrl2 = 0; + + if (attached) + ctrl1 = val; + else + ctrl1 = CONTROL1_SW_OPEN; + + ret = max8997_update_reg(info->muic, + MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + if (attached) + ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ + else + ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ + + ret = max8997_update_reg(info->muic, + MAX8997_MUIC_REG_CONTROL2, ctrl2, + CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); + if (ret < 0) { + dev_err(info->dev, "failed to update MUIC register\n"); + return ret; + } + + dev_info(info->dev, + "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", + ctrl1, ctrl2, attached ? "attached" : "detached"); + + return 0; +} + +/* + * max8997_muic_get_cable_type - Return cable type and check cable state + * @info: the instance including private data of max8997 MUIC + * @group: the path according to attached cable + * @attached: store cable state and return + * + * This function check the cable state either attached or detached, + * and then divide precise type of cable according to cable group. + * - MAX8997_CABLE_GROUP_ADC + * - MAX8997_CABLE_GROUP_CHG + */ +static int max8997_muic_get_cable_type(struct max8997_muic_info *info, + enum max8997_muic_cable_group group, bool *attached) +{ + int cable_type = 0; + int adc; + int chg_type; + + switch (group) { + case MAX8997_CABLE_GROUP_ADC: + /* + * Read ADC value to check cable type and decide cable state + * according to cable type + */ + adc = info->status[0] & STATUS1_ADC_MASK; + adc >>= STATUS1_ADC_SHIFT; + + /* + * Check current cable state/cable type and store cable type + * (info->prev_cable_type) for handling cable when cable is + * detached. + */ + if (adc == MAX8997_MUIC_ADC_OPEN) { + *attached = false; + + cable_type = info->prev_cable_type; + info->prev_cable_type = MAX8997_MUIC_ADC_OPEN; + } else { + *attached = true; + + cable_type = info->prev_cable_type = adc; + } + break; + case MAX8997_CABLE_GROUP_CHG: + /* + * Read charger type to check cable type and decide cable state + * according to type of charger cable. + */ + chg_type = info->status[1] & STATUS2_CHGTYP_MASK; + chg_type >>= STATUS2_CHGTYP_SHIFT; + + if (chg_type == MAX8997_CHARGER_TYPE_NONE) { + *attached = false; + + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE; + } else { + *attached = true; + + /* + * Check current cable state/cable type and store cable + * type(info->prev_chg_type) for handling cable when + * charger cable is detached. + */ + cable_type = info->prev_chg_type = chg_type; + } + + break; + default: + dev_err(info->dev, "Unknown cable group (%d)\n", group); + cable_type = -EINVAL; + break; + } + + return cable_type; +} + +static int max8997_muic_handle_usb(struct max8997_muic_info *info, + enum max8997_muic_usb_type usb_type, bool attached) +{ + int ret = 0; + + ret = max8997_muic_set_path(info, info->path_usb, attached); + if (ret < 0) { + dev_err(info->dev, "failed to update muic register\n"); + return ret; + } + + switch (usb_type) { + case MAX8997_USB_HOST: + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); + break; + case MAX8997_USB_DEVICE: + extcon_set_state_sync(info->edev, EXTCON_USB, attached); + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + break; + default: + dev_err(info->dev, "failed to detect %s usb cable\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + return 0; +} + +static int max8997_muic_handle_dock(struct max8997_muic_info *info, + int cable_type, bool attached) +{ + int ret = 0; + + ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); + if (ret) { + dev_err(info->dev, "failed to update muic register\n"); + return ret; + } + + switch (cable_type) { + case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: + case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: + extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); + break; + default: + dev_err(info->dev, "failed to detect %s dock device\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + return 0; +} + +static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, + bool attached) +{ + int ret = 0; + + /* switch to UART */ + ret = max8997_muic_set_path(info, info->path_uart, attached); + if (ret) { + dev_err(info->dev, "failed to update muic register\n"); + return ret; + } + + extcon_set_state_sync(info->edev, EXTCON_JIG, attached); + + return 0; +} + +static int max8997_muic_adc_handler(struct max8997_muic_info *info) +{ + int cable_type; + bool attached; + int ret = 0; + + /* Check cable state which is either detached or attached */ + cable_type = max8997_muic_get_cable_type(info, + MAX8997_CABLE_GROUP_ADC, &attached); + + switch (cable_type) { + case MAX8997_MUIC_ADC_GROUND: + ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached); + if (ret < 0) + return ret; + break; + case MAX8997_MUIC_ADC_MHL: + extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); + break; + case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: + case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: + ret = max8997_muic_handle_usb(info, + MAX8997_USB_DEVICE, attached); + if (ret < 0) + return ret; + break; + case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: + case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: + ret = max8997_muic_handle_dock(info, cable_type, attached); + if (ret < 0) + return ret; + break; + case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: + ret = max8997_muic_handle_jig_uart(info, attached); + break; + case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON: + case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON: + case MAX8997_MUIC_ADC_RESERVED_ACC_1: + case MAX8997_MUIC_ADC_RESERVED_ACC_2: + case MAX8997_MUIC_ADC_RESERVED_ACC_3: + case MAX8997_MUIC_ADC_RESERVED_ACC_4: + case MAX8997_MUIC_ADC_RESERVED_ACC_5: + case MAX8997_MUIC_ADC_CEA936_AUDIO: + case MAX8997_MUIC_ADC_PHONE_POWERED_DEV: + case MAX8997_MUIC_ADC_TTY_CONVERTER: + case MAX8997_MUIC_ADC_UART_CABLE: + case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG: + case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG: + case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE: + /* + * This cable isn't used in general case if it is specially + * needed to detect additional cable, should implement + * proper operation when this cable is attached/detached. + */ + dev_info(info->dev, + "cable is %s but it isn't used (type:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EAGAIN; + default: + dev_err(info->dev, + "failed to detect %s unknown cable (type:0x%x)\n", + attached ? "attached" : "detached", cable_type); + return -EINVAL; + } + + return 0; +} + +static int max8997_muic_chg_handler(struct max8997_muic_info *info) +{ + int chg_type; + bool attached; + int adc; + + chg_type = max8997_muic_get_cable_type(info, + MAX8997_CABLE_GROUP_CHG, &attached); + + switch (chg_type) { + case MAX8997_CHARGER_TYPE_NONE: + break; + case MAX8997_CHARGER_TYPE_USB: + adc = info->status[0] & STATUS1_ADC_MASK; + adc >>= STATUS1_ADC_SHIFT; + + if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { + max8997_muic_handle_usb(info, + MAX8997_USB_DEVICE, attached); + } + break; + case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, + attached); + break; + case MAX8997_CHARGER_TYPE_DEDICATED_CHG: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, + attached); + break; + case MAX8997_CHARGER_TYPE_500MA: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, + attached); + break; + case MAX8997_CHARGER_TYPE_1A: + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, + attached); + break; + default: + dev_err(info->dev, + "failed to detect %s unknown chg cable (type:0x%x)\n", + attached ? "attached" : "detached", chg_type); + return -EINVAL; + } + + return 0; +} + +static void max8997_muic_irq_work(struct work_struct *work) +{ + struct max8997_muic_info *info = container_of(work, + struct max8997_muic_info, irq_work); + int irq_type = 0; + int i, ret; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) + if (info->irq == muic_irqs[i].virq) + irq_type = muic_irqs[i].irq; + + ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, + 2, info->status); + if (ret) { + dev_err(info->dev, "failed to read muic register\n"); + mutex_unlock(&info->mutex); + return; + } + + switch (irq_type) { + case MAX8997_MUICIRQ_ADCError: + case MAX8997_MUICIRQ_ADCLow: + case MAX8997_MUICIRQ_ADC: + /* Handle all of cable except for charger cable */ + ret = max8997_muic_adc_handler(info); + break; + case MAX8997_MUICIRQ_VBVolt: + case MAX8997_MUICIRQ_DBChg: + case MAX8997_MUICIRQ_DCDTmr: + case MAX8997_MUICIRQ_ChgDetRun: + case MAX8997_MUICIRQ_ChgTyp: + /* Handle charger cable */ + ret = max8997_muic_chg_handler(info); + break; + case MAX8997_MUICIRQ_OVP: + break; + default: + dev_info(info->dev, "misc interrupt: irq %d occurred\n", + irq_type); + mutex_unlock(&info->mutex); + return; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +static irqreturn_t max8997_muic_irq_handler(int irq, void *data) +{ + struct max8997_muic_info *info = data; + + dev_dbg(info->dev, "irq:%d\n", irq); + info->irq = irq; + + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static int max8997_muic_detect_dev(struct max8997_muic_info *info) +{ + int ret = 0; + int adc; + int chg_type; + bool attached; + + mutex_lock(&info->mutex); + + /* Read STATUSx register to detect accessory */ + ret = max8997_bulk_read(info->muic, + MAX8997_MUIC_REG_STATUS1, 2, info->status); + if (ret) { + dev_err(info->dev, "failed to read MUIC register\n"); + mutex_unlock(&info->mutex); + return ret; + } + + adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, + &attached); + if (attached && adc != MAX8997_MUIC_ADC_OPEN) { + ret = max8997_muic_adc_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect ADC cable\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, + &attached); + if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) { + ret = max8997_muic_chg_handler(info); + if (ret < 0) { + dev_err(info->dev, "Cannot detect charger cable\n"); + mutex_unlock(&info->mutex); + return ret; + } + } + + mutex_unlock(&info->mutex); + + return 0; +} + +static void max8997_muic_detect_cable_wq(struct work_struct *work) +{ + struct max8997_muic_info *info = container_of(to_delayed_work(work), + struct max8997_muic_info, wq_detcable); + int ret; + + ret = max8997_muic_detect_dev(info); + if (ret < 0) + dev_err(info->dev, "failed to detect cable type\n"); +} + +static int max8997_muic_probe(struct platform_device *pdev) +{ + struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); + struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); + struct max8997_muic_info *info; + int delay_jiffies; + int ret, i; + + info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->muic = max8997->muic; + + platform_set_drvdata(pdev, info); + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, max8997_muic_irq_work); + + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { + struct max8997_muic_irq *muic_irq = &muic_irqs[i]; + unsigned int virq = 0; + + virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq); + if (!virq) { + ret = -EINVAL; + goto err_irq; + } + muic_irq->virq = virq; + + ret = request_threaded_irq(virq, NULL, + max8997_muic_irq_handler, + IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(&pdev->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + goto err_irq; + } + } + + /* External connector */ + info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); + ret = -ENOMEM; + goto err_irq; + } + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + goto err_irq; + } + + if (pdata && pdata->muic_pdata) { + struct max8997_muic_platform_data *muic_pdata + = pdata->muic_pdata; + + /* Initialize registers according to platform data */ + for (i = 0; i < muic_pdata->num_init_data; i++) { + max8997_write_reg(info->muic, + muic_pdata->init_data[i].addr, + muic_pdata->init_data[i].data); + } + + /* + * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB + * h/w path of COMP2/COMN1 on CONTROL1 register. + */ + if (muic_pdata->path_uart) + info->path_uart = muic_pdata->path_uart; + else + info->path_uart = CONTROL1_SW_UART; + + if (muic_pdata->path_usb) + info->path_usb = muic_pdata->path_usb; + else + info->path_usb = CONTROL1_SW_USB; + + /* + * Default delay time for detecting cable state + * after certain time. + */ + if (muic_pdata->detcable_delay_ms) + delay_jiffies = + msecs_to_jiffies(muic_pdata->detcable_delay_ms); + else + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + } else { + info->path_uart = CONTROL1_SW_UART; + info->path_usb = CONTROL1_SW_USB; + delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); + } + + /* Set initial path for UART */ + max8997_muic_set_path(info, info->path_uart, true); + + /* Set ADC debounce time */ + max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + delay_jiffies); + + return 0; + +err_irq: + while (--i >= 0) + free_irq(muic_irqs[i].virq, info); + return ret; +} + +static int max8997_muic_remove(struct platform_device *pdev) +{ + struct max8997_muic_info *info = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) + free_irq(muic_irqs[i].virq, info); + cancel_work_sync(&info->irq_work); + + return 0; +} + +static struct platform_driver max8997_muic_driver = { + .driver = { + .name = DEV_NAME, + }, + .probe = max8997_muic_probe, + .remove = max8997_muic_remove, +}; + +module_platform_driver(max8997_muic_driver); + +MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver"); +MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:max8997-muic"); diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c new file mode 100644 index 000000000..2af4369a2 --- /dev/null +++ b/drivers/extcon/extcon-palmas.c @@ -0,0 +1,452 @@ +/* + * Palmas USB transceiver driver + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Graeme Gregory <gg@slimlogic.co.uk> + * Author: Kishon Vijay Abraham I <kishon@ti.com> + * + * Based on twl6030_usb.c + * + * Author: Hema HK <hemahk@ti.com> + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/mfd/palmas.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/workqueue.h> + +#define USB_GPIO_DEBOUNCE_MS 20 /* ms */ + +static const unsigned int palmas_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static void palmas_usb_wakeup(struct palmas *palmas, int enable) +{ + if (enable) + palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, + PALMAS_USB_WAKEUP_ID_WK_UP_COMP); + else + palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, 0); +} + +static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb) +{ + struct palmas_usb *palmas_usb = _palmas_usb; + struct extcon_dev *edev = palmas_usb->edev; + unsigned int vbus_line_state; + + palmas_read(palmas_usb->palmas, PALMAS_INTERRUPT_BASE, + PALMAS_INT3_LINE_STATE, &vbus_line_state); + + if (vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS) { + if (palmas_usb->linkstat != PALMAS_USB_STATE_VBUS) { + palmas_usb->linkstat = PALMAS_USB_STATE_VBUS; + extcon_set_state_sync(edev, EXTCON_USB, true); + dev_dbg(palmas_usb->dev, "USB cable is attached\n"); + } else { + dev_dbg(palmas_usb->dev, + "Spurious connect event detected\n"); + } + } else if (!(vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS)) { + if (palmas_usb->linkstat == PALMAS_USB_STATE_VBUS) { + palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT; + extcon_set_state_sync(edev, EXTCON_USB, false); + dev_dbg(palmas_usb->dev, "USB cable is detached\n"); + } else { + dev_dbg(palmas_usb->dev, + "Spurious disconnect event detected\n"); + } + } + + return IRQ_HANDLED; +} + +static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb) +{ + unsigned int set, id_src; + struct palmas_usb *palmas_usb = _palmas_usb; + struct extcon_dev *edev = palmas_usb->edev; + + palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_LATCH_SET, &set); + palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_SRC, &id_src); + + if ((set & PALMAS_USB_ID_INT_SRC_ID_GND) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) { + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_LATCH_CLR, + PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND); + palmas_usb->linkstat = PALMAS_USB_STATE_ID; + extcon_set_state_sync(edev, EXTCON_USB_HOST, true); + dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n"); + } else if ((set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_FLOAT)) { + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_LATCH_CLR, + PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT); + palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT; + extcon_set_state_sync(edev, EXTCON_USB_HOST, false); + dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n"); + } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_ID) && + (!(set & PALMAS_USB_ID_INT_SRC_ID_GND))) { + palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT; + extcon_set_state_sync(edev, EXTCON_USB_HOST, false); + dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n"); + } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_DISCONNECT) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) { + palmas_usb->linkstat = PALMAS_USB_STATE_ID; + extcon_set_state_sync(edev, EXTCON_USB_HOST, true); + dev_dbg(palmas_usb->dev, " USB-HOST cable is attached\n"); + } + + return IRQ_HANDLED; +} + +static void palmas_gpio_id_detect(struct work_struct *work) +{ + int id; + struct palmas_usb *palmas_usb = container_of(to_delayed_work(work), + struct palmas_usb, + wq_detectid); + struct extcon_dev *edev = palmas_usb->edev; + + if (!palmas_usb->id_gpiod) + return; + + id = gpiod_get_value_cansleep(palmas_usb->id_gpiod); + + if (id) { + extcon_set_state_sync(edev, EXTCON_USB_HOST, false); + dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n"); + } else { + extcon_set_state_sync(edev, EXTCON_USB_HOST, true); + dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n"); + } +} + +static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb) +{ + struct palmas_usb *palmas_usb = _palmas_usb; + + queue_delayed_work(system_power_efficient_wq, &palmas_usb->wq_detectid, + palmas_usb->sw_debounce_jiffies); + + return IRQ_HANDLED; +} + +static void palmas_enable_irq(struct palmas_usb *palmas_usb) +{ + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_VBUS_CTRL_SET, + PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP); + + if (palmas_usb->enable_id_detection) { + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_CTRL_SET, + PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP); + + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_EN_HI_SET, + PALMAS_USB_ID_INT_EN_HI_SET_ID_GND | + PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT); + } + + if (palmas_usb->enable_vbus_detection) + palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb); + + /* cold plug for host mode needs this delay */ + if (palmas_usb->enable_id_detection) { + msleep(30); + palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb); + } +} + +static int palmas_usb_probe(struct platform_device *pdev) +{ + struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); + struct palmas_usb_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct device_node *node = pdev->dev.of_node; + struct palmas_usb *palmas_usb; + int status; + + if (!palmas) { + dev_err(&pdev->dev, "failed to get valid parent\n"); + return -EINVAL; + } + + palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL); + if (!palmas_usb) + return -ENOMEM; + + if (node && !pdata) { + palmas_usb->wakeup = of_property_read_bool(node, "ti,wakeup"); + palmas_usb->enable_id_detection = of_property_read_bool(node, + "ti,enable-id-detection"); + palmas_usb->enable_vbus_detection = of_property_read_bool(node, + "ti,enable-vbus-detection"); + } else { + palmas_usb->wakeup = true; + palmas_usb->enable_id_detection = true; + palmas_usb->enable_vbus_detection = true; + + if (pdata) + palmas_usb->wakeup = pdata->wakeup; + } + + palmas_usb->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id", + GPIOD_IN); + if (IS_ERR(palmas_usb->id_gpiod)) { + dev_err(&pdev->dev, "failed to get id gpio\n"); + return PTR_ERR(palmas_usb->id_gpiod); + } + + palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus", + GPIOD_IN); + if (IS_ERR(palmas_usb->vbus_gpiod)) { + dev_err(&pdev->dev, "failed to get vbus gpio\n"); + return PTR_ERR(palmas_usb->vbus_gpiod); + } + + if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) { + palmas_usb->enable_id_detection = false; + palmas_usb->enable_gpio_id_detection = true; + } + + if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) { + palmas_usb->enable_vbus_detection = false; + palmas_usb->enable_gpio_vbus_detection = true; + } + + if (palmas_usb->enable_gpio_id_detection) { + u32 debounce; + + if (of_property_read_u32(node, "debounce-delay-ms", &debounce)) + debounce = USB_GPIO_DEBOUNCE_MS; + + status = gpiod_set_debounce(palmas_usb->id_gpiod, + debounce * 1000); + if (status < 0) + palmas_usb->sw_debounce_jiffies = msecs_to_jiffies(debounce); + } + + INIT_DELAYED_WORK(&palmas_usb->wq_detectid, palmas_gpio_id_detect); + + palmas->usb = palmas_usb; + palmas_usb->palmas = palmas; + + palmas_usb->dev = &pdev->dev; + + palmas_usb_wakeup(palmas, palmas_usb->wakeup); + + platform_set_drvdata(pdev, palmas_usb); + + palmas_usb->edev = devm_extcon_dev_allocate(&pdev->dev, + palmas_extcon_cable); + if (IS_ERR(palmas_usb->edev)) { + dev_err(&pdev->dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + status = devm_extcon_dev_register(&pdev->dev, palmas_usb->edev); + if (status) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + return status; + } + + if (palmas_usb->enable_id_detection) { + palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_ID_OTG_IRQ); + palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_ID_IRQ); + status = devm_request_threaded_irq(palmas_usb->dev, + palmas_usb->id_irq, + NULL, palmas_id_irq_handler, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | + IRQF_ONESHOT, + "palmas_usb_id", palmas_usb); + if (status < 0) { + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", + palmas_usb->id_irq, status); + return status; + } + } else if (palmas_usb->enable_gpio_id_detection) { + palmas_usb->gpio_id_irq = gpiod_to_irq(palmas_usb->id_gpiod); + if (palmas_usb->gpio_id_irq < 0) { + dev_err(&pdev->dev, "failed to get id irq\n"); + return palmas_usb->gpio_id_irq; + } + status = devm_request_threaded_irq(&pdev->dev, + palmas_usb->gpio_id_irq, + NULL, + palmas_gpio_id_irq_handler, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + "palmas_usb_id", + palmas_usb); + if (status < 0) { + dev_err(&pdev->dev, + "failed to request handler for id irq\n"); + return status; + } + } + + if (palmas_usb->enable_vbus_detection) { + palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_VBUS_OTG_IRQ); + palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_VBUS_IRQ); + status = devm_request_threaded_irq(palmas_usb->dev, + palmas_usb->vbus_irq, NULL, + palmas_vbus_irq_handler, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | + IRQF_ONESHOT, + "palmas_usb_vbus", palmas_usb); + if (status < 0) { + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", + palmas_usb->vbus_irq, status); + return status; + } + } else if (palmas_usb->enable_gpio_vbus_detection) { + /* remux GPIO_1 as VBUSDET */ + status = palmas_update_bits(palmas, + PALMAS_PU_PD_OD_BASE, + PALMAS_PRIMARY_SECONDARY_PAD1, + PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK, + (1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT)); + if (status < 0) { + dev_err(&pdev->dev, "can't remux GPIO1\n"); + return status; + } + + palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_VBUS_OTG_IRQ); + palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod); + if (palmas_usb->gpio_vbus_irq < 0) { + dev_err(&pdev->dev, "failed to get vbus irq\n"); + return palmas_usb->gpio_vbus_irq; + } + status = devm_request_threaded_irq(&pdev->dev, + palmas_usb->gpio_vbus_irq, + NULL, + palmas_vbus_irq_handler, + IRQF_TRIGGER_FALLING | + IRQF_TRIGGER_RISING | + IRQF_ONESHOT, + "palmas_usb_vbus", + palmas_usb); + if (status < 0) { + dev_err(&pdev->dev, + "failed to request handler for vbus irq\n"); + return status; + } + } + + palmas_enable_irq(palmas_usb); + /* perform initial detection */ + if (palmas_usb->enable_gpio_vbus_detection) + palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb); + palmas_gpio_id_detect(&palmas_usb->wq_detectid.work); + device_set_wakeup_capable(&pdev->dev, true); + return 0; +} + +static int palmas_usb_remove(struct platform_device *pdev) +{ + struct palmas_usb *palmas_usb = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&palmas_usb->wq_detectid); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int palmas_usb_suspend(struct device *dev) +{ + struct palmas_usb *palmas_usb = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) { + if (palmas_usb->enable_vbus_detection) + enable_irq_wake(palmas_usb->vbus_irq); + if (palmas_usb->enable_gpio_vbus_detection) + enable_irq_wake(palmas_usb->gpio_vbus_irq); + if (palmas_usb->enable_id_detection) + enable_irq_wake(palmas_usb->id_irq); + if (palmas_usb->enable_gpio_id_detection) + enable_irq_wake(palmas_usb->gpio_id_irq); + } + return 0; +} + +static int palmas_usb_resume(struct device *dev) +{ + struct palmas_usb *palmas_usb = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) { + if (palmas_usb->enable_vbus_detection) + disable_irq_wake(palmas_usb->vbus_irq); + if (palmas_usb->enable_gpio_vbus_detection) + disable_irq_wake(palmas_usb->gpio_vbus_irq); + if (palmas_usb->enable_id_detection) + disable_irq_wake(palmas_usb->id_irq); + if (palmas_usb->enable_gpio_id_detection) + disable_irq_wake(palmas_usb->gpio_id_irq); + } + + /* check if GPIO states changed while suspend/resume */ + if (palmas_usb->enable_gpio_vbus_detection) + palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb); + palmas_gpio_id_detect(&palmas_usb->wq_detectid.work); + + return 0; +}; +#endif + +static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume); + +static const struct of_device_id of_palmas_match_tbl[] = { + { .compatible = "ti,palmas-usb", }, + { .compatible = "ti,palmas-usb-vid", }, + { .compatible = "ti,twl6035-usb", }, + { .compatible = "ti,twl6035-usb-vid", }, + { /* end */ } +}; + +static struct platform_driver palmas_usb_driver = { + .probe = palmas_usb_probe, + .remove = palmas_usb_remove, + .driver = { + .name = "palmas-usb", + .of_match_table = of_palmas_match_tbl, + .pm = &palmas_pm_ops, + }, +}; + +module_platform_driver(palmas_usb_driver); + +MODULE_ALIAS("platform:palmas-usb"); +MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); +MODULE_DESCRIPTION("Palmas USB transceiver driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(of, of_palmas_match_tbl); diff --git a/drivers/extcon/extcon-qcom-spmi-misc.c b/drivers/extcon/extcon-qcom-spmi-misc.c new file mode 100644 index 000000000..72bc0f247 --- /dev/null +++ b/drivers/extcon/extcon-qcom-spmi-misc.c @@ -0,0 +1,171 @@ +/** + * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID + * detection based on extcon-usb-gpio.c. + * + * Copyright (C) 2016 Linaro, Ltd. + * Stephen Boyd <stephen.boyd@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/extcon-provider.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/workqueue.h> + +#define USB_ID_DEBOUNCE_MS 5 /* ms */ + +struct qcom_usb_extcon_info { + struct extcon_dev *edev; + int irq; + struct delayed_work wq_detcable; + unsigned long debounce_jiffies; +}; + +static const unsigned int qcom_usb_extcon_cable[] = { + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static void qcom_usb_extcon_detect_cable(struct work_struct *work) +{ + bool id; + int ret; + struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work), + struct qcom_usb_extcon_info, + wq_detcable); + + /* check ID and update cable state */ + ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id); + if (ret) + return; + + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id); +} + +static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id) +{ + struct qcom_usb_extcon_info *info = dev_id; + + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + info->debounce_jiffies); + + return IRQ_HANDLED; +} + +static int qcom_usb_extcon_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct qcom_usb_extcon_info *info; + int ret; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->edev = devm_extcon_dev_allocate(dev, qcom_usb_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(dev, info->edev); + if (ret < 0) { + dev_err(dev, "failed to register extcon device\n"); + return ret; + } + + info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS); + INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable); + + info->irq = platform_get_irq_byname(pdev, "usb_id"); + if (info->irq < 0) + return info->irq; + + ret = devm_request_threaded_irq(dev, info->irq, NULL, + qcom_usb_irq_handler, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + pdev->name, info); + if (ret < 0) { + dev_err(dev, "failed to request handler for ID IRQ\n"); + return ret; + } + + platform_set_drvdata(pdev, info); + device_init_wakeup(dev, 1); + + /* Perform initial detection */ + qcom_usb_extcon_detect_cable(&info->wq_detcable.work); + + return 0; +} + +static int qcom_usb_extcon_remove(struct platform_device *pdev) +{ + struct qcom_usb_extcon_info *info = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&info->wq_detcable); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int qcom_usb_extcon_suspend(struct device *dev) +{ + struct qcom_usb_extcon_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (device_may_wakeup(dev)) + ret = enable_irq_wake(info->irq); + + return ret; +} + +static int qcom_usb_extcon_resume(struct device *dev) +{ + struct qcom_usb_extcon_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (device_may_wakeup(dev)) + ret = disable_irq_wake(info->irq); + + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(qcom_usb_extcon_pm_ops, + qcom_usb_extcon_suspend, qcom_usb_extcon_resume); + +static const struct of_device_id qcom_usb_extcon_dt_match[] = { + { .compatible = "qcom,pm8941-misc", }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_usb_extcon_dt_match); + +static struct platform_driver qcom_usb_extcon_driver = { + .probe = qcom_usb_extcon_probe, + .remove = qcom_usb_extcon_remove, + .driver = { + .name = "extcon-pm8941-misc", + .pm = &qcom_usb_extcon_pm_ops, + .of_match_table = qcom_usb_extcon_dt_match, + }, +}; +module_platform_driver(qcom_usb_extcon_driver); + +MODULE_DESCRIPTION("QCOM USB ID extcon driver"); +MODULE_AUTHOR("Stephen Boyd <stephen.boyd@linaro.org>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c new file mode 100644 index 000000000..e059bd5f2 --- /dev/null +++ b/drivers/extcon/extcon-rt8973a.c @@ -0,0 +1,719 @@ +/* + * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * Author: Chanwoo Choi <cw00.choi@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/extcon-provider.h> + +#include "extcon-rt8973a.h" + +#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ + +struct muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +struct reg_data { + u8 reg; + u8 mask; + u8 val; + bool invert; +}; + +struct rt8973a_muic_info { + struct device *dev; + struct extcon_dev *edev; + + struct i2c_client *i2c; + struct regmap *regmap; + + struct regmap_irq_chip_data *irq_data; + struct muic_irq *muic_irqs; + unsigned int num_muic_irqs; + int irq; + bool irq_attach; + bool irq_detach; + bool irq_ovp; + bool irq_otp; + struct work_struct irq_work; + + struct reg_data *reg_data; + unsigned int num_reg_data; + bool auto_config; + + struct mutex mutex; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; +}; + +/* Default value of RT8973A register to bring up MUIC device. */ +static struct reg_data rt8973a_reg_data[] = { + { + .reg = RT8973A_REG_CONTROL1, + .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK + | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK + | RT8973A_REG_CONTROL1_CHGTYP_MASK + | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK + | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK + | RT8973A_REG_CONTROL1_INTM_MASK, + .val = RT8973A_REG_CONTROL1_ADC_EN_MASK + | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK + | RT8973A_REG_CONTROL1_CHGTYP_MASK, + .invert = false, + }, + { /* sentinel */ } +}; + +/* List of detectable cables */ +static const unsigned int rt8973a_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_JIG, + EXTCON_NONE, +}; + +/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ +enum rt8973a_event_type { + RT8973A_EVENT_ATTACH = 1, + RT8973A_EVENT_DETACH, + RT8973A_EVENT_OVP, + RT8973A_EVENT_OTP, +}; + +/* Define supported accessory type */ +enum rt8973a_muic_acc_type { + RT8973A_MUIC_ADC_OTG = 0x0, + RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, + RT8973A_MUIC_ADC_RESERVED_ACC_1, + RT8973A_MUIC_ADC_RESERVED_ACC_2, + RT8973A_MUIC_ADC_RESERVED_ACC_3, + RT8973A_MUIC_ADC_RESERVED_ACC_4, + RT8973A_MUIC_ADC_RESERVED_ACC_5, + RT8973A_MUIC_ADC_AUDIO_TYPE2, + RT8973A_MUIC_ADC_PHONE_POWERED_DEV, + RT8973A_MUIC_ADC_UNKNOWN_ACC_1, + RT8973A_MUIC_ADC_UNKNOWN_ACC_2, + RT8973A_MUIC_ADC_TA, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, + RT8973A_MUIC_ADC_UNKNOWN_ACC_3, + RT8973A_MUIC_ADC_UNKNOWN_ACC_4, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, + RT8973A_MUIC_ADC_UNKNOWN_ACC_5, + RT8973A_MUIC_ADC_OPEN = 0x1f, + + /* + * The below accessories has same ADC value (0x1f). + * So, Device type1 is used to separate specific accessory. + */ + /* |---------|--ADC| */ + /* | [7:5]|[4:0]| */ + RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ +}; + +/* List of supported interrupt for RT8973A */ +static struct muic_irq rt8973a_muic_irqs[] = { + { RT8973A_INT1_ATTACH, "muic-attach" }, + { RT8973A_INT1_DETACH, "muic-detach" }, + { RT8973A_INT1_CHGDET, "muic-chgdet" }, + { RT8973A_INT1_DCD_T, "muic-dcd-t" }, + { RT8973A_INT1_OVP, "muic-ovp" }, + { RT8973A_INT1_CONNECT, "muic-connect" }, + { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, + { RT8973A_INT1_OTP, "muic-otp" }, + { RT8973A_INT2_UVLO, "muic-uvlo" }, + { RT8973A_INT2_POR, "muic-por" }, + { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, + { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, + { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, + { RT8973A_INT2_OCP, "muic-ocp" }, + { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, +}; + +/* Define interrupt list of RT8973A to register regmap_irq */ +static const struct regmap_irq rt8973a_irqs[] = { + /* INT1 interrupts */ + { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, + + /* INT2 interrupts */ + { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, + { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, +}; + +static const struct regmap_irq_chip rt8973a_muic_irq_chip = { + .name = "rt8973a", + .status_base = RT8973A_REG_INT1, + .mask_base = RT8973A_REG_INTM1, + .mask_invert = false, + .num_regs = 2, + .irqs = rt8973a_irqs, + .num_irqs = ARRAY_SIZE(rt8973a_irqs), +}; + +/* Define regmap configuration of RT8973A for I2C communication */ +static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case RT8973A_REG_INTM1: + case RT8973A_REG_INTM2: + return true; + default: + break; + } + return false; +} + +static const struct regmap_config rt8973a_muic_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = rt8973a_muic_volatile_reg, + .max_register = RT8973A_REG_END, +}; + +/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ +static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, + unsigned int con_sw, bool attached) +{ + int ret; + + /* + * Don't need to set h/w path according to cable type + * if Auto-configuration mode of CONTROL1 register is true. + */ + if (info->auto_config) + return 0; + + if (!attached) + con_sw = DM_DP_SWITCH_UART; + + switch (con_sw) { + case DM_DP_SWITCH_OPEN: + case DM_DP_SWITCH_USB: + case DM_DP_SWITCH_UART: + ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, + RT8973A_REG_MANUAL_SW1_DP_MASK | + RT8973A_REG_MANUAL_SW1_DM_MASK, + con_sw); + if (ret < 0) { + dev_err(info->dev, + "cannot update DM_CON/DP_CON switch\n"); + return ret; + } + break; + default: + dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", + con_sw); + return -EINVAL; + } + + return 0; +} + +static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) +{ + unsigned int adc, dev1; + int ret, cable_type; + + /* Read ADC value according to external cable or button */ + ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); + if (ret) { + dev_err(info->dev, "failed to read ADC register\n"); + return ret; + } + cable_type = adc & RT8973A_REG_ADC_MASK; + + /* Read Device 1 reigster to identify correct cable type */ + ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); + if (ret) { + dev_err(info->dev, "failed to read DEV1 register\n"); + return ret; + } + + switch (adc) { + case RT8973A_MUIC_ADC_OPEN: + if (dev1 & RT8973A_REG_DEV1_USB_MASK) + cable_type = RT8973A_MUIC_ADC_USB; + else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) + cable_type = RT8973A_MUIC_ADC_TA; + else + cable_type = RT8973A_MUIC_ADC_OPEN; + break; + default: + break; + } + + return cable_type; +} + +static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, + enum rt8973a_event_type event) +{ + static unsigned int prev_cable_type; + unsigned int con_sw = DM_DP_SWITCH_UART; + int ret, cable_type; + unsigned int id; + bool attached = false; + + switch (event) { + case RT8973A_EVENT_ATTACH: + cable_type = rt8973a_muic_get_cable_type(info); + attached = true; + break; + case RT8973A_EVENT_DETACH: + cable_type = prev_cable_type; + attached = false; + break; + case RT8973A_EVENT_OVP: + case RT8973A_EVENT_OTP: + dev_warn(info->dev, + "happen Over %s issue. Need to disconnect all cables\n", + event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); + cable_type = prev_cable_type; + attached = false; + break; + default: + dev_err(info->dev, + "Cannot handle this event (event:%d)\n", event); + return -EINVAL; + } + prev_cable_type = cable_type; + + switch (cable_type) { + case RT8973A_MUIC_ADC_OTG: + id = EXTCON_USB_HOST; + con_sw = DM_DP_SWITCH_USB; + break; + case RT8973A_MUIC_ADC_TA: + id = EXTCON_CHG_USB_DCP; + con_sw = DM_DP_SWITCH_OPEN; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: + id = EXTCON_JIG; + con_sw = DM_DP_SWITCH_USB; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: + id = EXTCON_JIG; + con_sw = DM_DP_SWITCH_UART; + break; + case RT8973A_MUIC_ADC_USB: + id = EXTCON_USB; + con_sw = DM_DP_SWITCH_USB; + break; + case RT8973A_MUIC_ADC_OPEN: + return 0; + case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: + dev_warn(info->dev, + "Unknown accessory type (adc:0x%x)\n", cable_type); + return 0; + case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_TYPE2: + dev_warn(info->dev, + "Audio device/button type (adc:0x%x)\n", cable_type); + return 0; + case RT8973A_MUIC_ADC_RESERVED_ACC_1: + case RT8973A_MUIC_ADC_RESERVED_ACC_2: + case RT8973A_MUIC_ADC_RESERVED_ACC_3: + case RT8973A_MUIC_ADC_RESERVED_ACC_4: + case RT8973A_MUIC_ADC_RESERVED_ACC_5: + case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: + return 0; + default: + dev_err(info->dev, + "Cannot handle this cable_type (adc:0x%x)\n", + cable_type); + return -EINVAL; + } + + /* Change internal hardware path(DM_CON/DP_CON) */ + ret = rt8973a_muic_set_path(info, con_sw, attached); + if (ret < 0) + return ret; + + /* Change the state of external accessory */ + extcon_set_state_sync(info->edev, id, attached); + if (id == EXTCON_USB) + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + + return 0; +} + +static void rt8973a_muic_irq_work(struct work_struct *work) +{ + struct rt8973a_muic_info *info = container_of(work, + struct rt8973a_muic_info, irq_work); + int ret = 0; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + /* Detect attached or detached cables */ + if (info->irq_attach) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); + info->irq_attach = false; + } + + if (info->irq_detach) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); + info->irq_detach = false; + } + + if (info->irq_ovp) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); + info->irq_ovp = false; + } + + if (info->irq_otp) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); + info->irq_otp = false; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) +{ + struct rt8973a_muic_info *info = data; + int i, irq_type = -1; + + for (i = 0; i < info->num_muic_irqs; i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->muic_irqs[i].irq; + + switch (irq_type) { + case RT8973A_INT1_ATTACH: + info->irq_attach = true; + break; + case RT8973A_INT1_DETACH: + info->irq_detach = true; + break; + case RT8973A_INT1_OVP: + info->irq_ovp = true; + break; + case RT8973A_INT1_OTP: + info->irq_otp = true; + break; + case RT8973A_INT1_CHGDET: + case RT8973A_INT1_DCD_T: + case RT8973A_INT1_CONNECT: + case RT8973A_INT1_ADC_CHG: + case RT8973A_INT2_UVLO: + case RT8973A_INT2_POR: + case RT8973A_INT2_OTP_FET: + case RT8973A_INT2_OVP_FET: + case RT8973A_INT2_OCP_LATCH: + case RT8973A_INT2_OCP: + case RT8973A_INT2_OVP_OCP: + default: + dev_dbg(info->dev, + "Cannot handle this interrupt (%d)\n", irq_type); + break; + } + + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static void rt8973a_muic_detect_cable_wq(struct work_struct *work) +{ + struct rt8973a_muic_info *info = container_of(to_delayed_work(work), + struct rt8973a_muic_info, wq_detcable); + int ret; + + /* Notify the state of connector cable or not */ + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); + if (ret < 0) + dev_warn(info->dev, "failed to detect cable state\n"); +} + +static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) +{ + unsigned int data, vendor_id, version_id; + int i, ret; + + /* To test I2C, Print version_id and vendor_id of RT8973A */ + ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); + if (ret) { + dev_err(info->dev, + "failed to read DEVICE_ID register: %d\n", ret); + return; + } + + vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> + RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); + version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> + RT8973A_REG_DEVICE_ID_VERSION_SHIFT); + + dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", + version_id, vendor_id); + + /* Initiazle the register of RT8973A device to bring-up */ + for (i = 0; i < info->num_reg_data; i++) { + u8 reg = info->reg_data[i].reg; + u8 mask = info->reg_data[i].mask; + u8 val = 0; + + if (info->reg_data[i].invert) + val = ~info->reg_data[i].val; + else + val = info->reg_data[i].val; + + regmap_update_bits(info->regmap, reg, mask, val); + } + + /* Check whether RT8973A is auto switching mode or not */ + ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); + if (ret) { + dev_err(info->dev, + "failed to read CONTROL1 register: %d\n", ret); + return; + } + + data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; + if (data) { + info->auto_config = true; + dev_info(info->dev, + "Enable Auto-configuration for internal path\n"); + } +} + +static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device_node *np = i2c->dev.of_node; + struct rt8973a_muic_info *info; + int i, ret, irq_flags; + + if (!np) + return -EINVAL; + + info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + i2c_set_clientdata(i2c, info); + + info->dev = &i2c->dev; + info->i2c = i2c; + info->irq = i2c->irq; + info->muic_irqs = rt8973a_muic_irqs; + info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); + info->reg_data = rt8973a_reg_data; + info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); + + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); + + info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(info->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + /* Support irq domain for RT8973A MUIC device */ + irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; + ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, + &rt8973a_muic_irq_chip, &info->irq_data); + if (ret != 0) { + dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", + info->irq, ret); + return ret; + } + + for (i = 0; i < info->num_muic_irqs; i++) { + struct muic_irq *muic_irq = &info->muic_irqs[i]; + int virq = 0; + + virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); + if (virq <= 0) + return -EINVAL; + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(info->dev, virq, NULL, + rt8973a_muic_irq_handler, + IRQF_NO_SUSPEND | IRQF_ONESHOT, + muic_irq->name, info); + if (ret) { + dev_err(info->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + return ret; + } + } + + /* Allocate extcon device */ + info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(info->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + + /* Register extcon device */ + ret = devm_extcon_dev_register(info->dev, info->edev); + if (ret) { + dev_err(info->dev, "failed to register extcon device\n"); + return ret; + } + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + msecs_to_jiffies(DELAY_MS_DEFAULT)); + + /* Initialize RT8973A device and print vendor id and version id */ + rt8973a_init_dev_type(info); + + return 0; +} + +static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) +{ + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + regmap_del_irq_chip(info->irq, info->irq_data); + + return 0; +} + +static const struct of_device_id rt8973a_dt_match[] = { + { .compatible = "richtek,rt8973a-muic" }, + { }, +}; +MODULE_DEVICE_TABLE(of, rt8973a_dt_match); + +#ifdef CONFIG_PM_SLEEP +static int rt8973a_muic_suspend(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + enable_irq_wake(info->irq); + + return 0; +} + +static int rt8973a_muic_resume(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + disable_irq_wake(info->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, + rt8973a_muic_suspend, rt8973a_muic_resume); + +static const struct i2c_device_id rt8973a_i2c_id[] = { + { "rt8973a", TYPE_RT8973A }, + { } +}; +MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); + +static struct i2c_driver rt8973a_muic_i2c_driver = { + .driver = { + .name = "rt8973a", + .pm = &rt8973a_muic_pm_ops, + .of_match_table = rt8973a_dt_match, + }, + .probe = rt8973a_muic_i2c_probe, + .remove = rt8973a_muic_i2c_remove, + .id_table = rt8973a_i2c_id, +}; + +static int __init rt8973a_muic_i2c_init(void) +{ + return i2c_add_driver(&rt8973a_muic_i2c_driver); +} +subsys_initcall(rt8973a_muic_i2c_init); + +MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-rt8973a.h b/drivers/extcon/extcon-rt8973a.h new file mode 100644 index 000000000..9dc3e0227 --- /dev/null +++ b/drivers/extcon/extcon-rt8973a.h @@ -0,0 +1,203 @@ +/* + * rt8973a.h + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __LINUX_EXTCON_RT8973A_H +#define __LINUX_EXTCON_RT8973A_H + +enum rt8973a_types { + TYPE_RT8973A, +}; + +/* RT8973A registers */ +enum rt8973A_reg { + RT8973A_REG_DEVICE_ID = 0x1, + RT8973A_REG_CONTROL1, + RT8973A_REG_INT1, + RT8973A_REG_INT2, + RT8973A_REG_INTM1, + RT8973A_REG_INTM2, + RT8973A_REG_ADC, + RT8973A_REG_RSVD_1, + RT8973A_REG_RSVD_2, + RT8973A_REG_DEV1, + RT8973A_REG_DEV2, + RT8973A_REG_RSVD_3, + RT8973A_REG_RSVD_4, + RT8973A_REG_RSVD_5, + RT8973A_REG_RSVD_6, + RT8973A_REG_RSVD_7, + RT8973A_REG_RSVD_8, + RT8973A_REG_RSVD_9, + RT8973A_REG_MANUAL_SW1, + RT8973A_REG_MANUAL_SW2, + RT8973A_REG_RSVD_10, + RT8973A_REG_RSVD_11, + RT8973A_REG_RSVD_12, + RT8973A_REG_RSVD_13, + RT8973A_REG_RSVD_14, + RT8973A_REG_RSVD_15, + RT8973A_REG_RESET, + + RT8973A_REG_END, +}; + +/* Define RT8973A MASK/SHIFT constant */ +#define RT8973A_REG_DEVICE_ID_VENDOR_SHIFT 0 +#define RT8973A_REG_DEVICE_ID_VERSION_SHIFT 3 +#define RT8973A_REG_DEVICE_ID_VENDOR_MASK (0x7 << RT8973A_REG_DEVICE_ID_VENDOR_SHIFT) +#define RT8973A_REG_DEVICE_ID_VERSION_MASK (0x1f << RT8973A_REG_DEVICE_ID_VERSION_SHIFT) + +#define RT8973A_REG_CONTROL1_INTM_SHIFT 0 +#define RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT 2 +#define RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT 3 +#define RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT 4 +#define RT8973A_REG_CONTROL1_CHGTYP_SHIFT 5 +#define RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT 6 +#define RT8973A_REG_CONTROL1_ADC_EN_SHIFT 7 +#define RT8973A_REG_CONTROL1_INTM_MASK (0x1 << RT8973A_REG_CONTROL1_INTM_SHIFT) +#define RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK (0x1 << RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT) +#define RT8973A_REG_CONTROL1_I2C_RST_EN_MASK (0x1 << RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT) +#define RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK (0x1 << RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT) +#define RT8973A_REG_CONTROL1_CHGTYP_MASK (0x1 << RT8973A_REG_CONTROL1_CHGTYP_SHIFT) +#define RT8973A_REG_CONTROL1_USB_CHD_EN_MASK (0x1 << RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT) +#define RT8973A_REG_CONTROL1_ADC_EN_MASK (0x1 << RT8973A_REG_CONTROL1_ADC_EN_SHIFT) + +#define RT9873A_REG_INTM1_ATTACH_SHIFT 0 +#define RT9873A_REG_INTM1_DETACH_SHIFT 1 +#define RT9873A_REG_INTM1_CHGDET_SHIFT 2 +#define RT9873A_REG_INTM1_DCD_T_SHIFT 3 +#define RT9873A_REG_INTM1_OVP_SHIFT 4 +#define RT9873A_REG_INTM1_CONNECT_SHIFT 5 +#define RT9873A_REG_INTM1_ADC_CHG_SHIFT 6 +#define RT9873A_REG_INTM1_OTP_SHIFT 7 +#define RT9873A_REG_INTM1_ATTACH_MASK (0x1 << RT9873A_REG_INTM1_ATTACH_SHIFT) +#define RT9873A_REG_INTM1_DETACH_MASK (0x1 << RT9873A_REG_INTM1_DETACH_SHIFT) +#define RT9873A_REG_INTM1_CHGDET_MASK (0x1 << RT9873A_REG_INTM1_CHGDET_SHIFT) +#define RT9873A_REG_INTM1_DCD_T_MASK (0x1 << RT9873A_REG_INTM1_DCD_T_SHIFT) +#define RT9873A_REG_INTM1_OVP_MASK (0x1 << RT9873A_REG_INTM1_OVP_SHIFT) +#define RT9873A_REG_INTM1_CONNECT_MASK (0x1 << RT9873A_REG_INTM1_CONNECT_SHIFT) +#define RT9873A_REG_INTM1_ADC_CHG_MASK (0x1 << RT9873A_REG_INTM1_ADC_CHG_SHIFT) +#define RT9873A_REG_INTM1_OTP_MASK (0x1 << RT9873A_REG_INTM1_OTP_SHIFT) + +#define RT9873A_REG_INTM2_UVLO_SHIFT 1 +#define RT9873A_REG_INTM2_POR_SHIFT 2 +#define RT9873A_REG_INTM2_OTP_FET_SHIFT 3 +#define RT9873A_REG_INTM2_OVP_FET_SHIFT 4 +#define RT9873A_REG_INTM2_OCP_LATCH_SHIFT 5 +#define RT9873A_REG_INTM2_OCP_SHIFT 6 +#define RT9873A_REG_INTM2_OVP_OCP_SHIFT 7 +#define RT9873A_REG_INTM2_UVLO_MASK (0x1 << RT9873A_REG_INTM2_UVLO_SHIFT) +#define RT9873A_REG_INTM2_POR_MASK (0x1 << RT9873A_REG_INTM2_POR_SHIFT) +#define RT9873A_REG_INTM2_OTP_FET_MASK (0x1 << RT9873A_REG_INTM2_OTP_FET_SHIFT) +#define RT9873A_REG_INTM2_OVP_FET_MASK (0x1 << RT9873A_REG_INTM2_OVP_FET_SHIFT) +#define RT9873A_REG_INTM2_OCP_LATCH_MASK (0x1 << RT9873A_REG_INTM2_OCP_LATCH_SHIFT) +#define RT9873A_REG_INTM2_OCP_MASK (0x1 << RT9873A_REG_INTM2_OCP_SHIFT) +#define RT9873A_REG_INTM2_OVP_OCP_MASK (0x1 << RT9873A_REG_INTM2_OVP_OCP_SHIFT) + +#define RT8973A_REG_ADC_SHIFT 0 +#define RT8973A_REG_ADC_MASK (0x1f << RT8973A_REG_ADC_SHIFT) + +#define RT8973A_REG_DEV1_OTG_SHIFT 0 +#define RT8973A_REG_DEV1_SDP_SHIFT 2 +#define RT8973A_REG_DEV1_UART_SHIFT 3 +#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT 4 +#define RT8973A_REG_DEV1_CDPORT_SHIFT 5 +#define RT8973A_REG_DEV1_DCPORT_SHIFT 6 +#define RT8973A_REG_DEV1_OTG_MASK (0x1 << RT8973A_REG_DEV1_OTG_SHIFT) +#define RT8973A_REG_DEV1_SDP_MASK (0x1 << RT8973A_REG_DEV1_SDP_SHIFT) +#define RT8973A_REG_DEV1_UART_MASK (0x1 << RT8973A_REG_DEV1_UART_SHIFT) +#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_MASK (0x1 << RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT) +#define RT8973A_REG_DEV1_CDPORT_MASK (0x1 << RT8973A_REG_DEV1_CDPORT_SHIFT) +#define RT8973A_REG_DEV1_DCPORT_MASK (0x1 << RT8973A_REG_DEV1_DCPORT_SHIFT) +#define RT8973A_REG_DEV1_USB_MASK (RT8973A_REG_DEV1_SDP_MASK \ + | RT8973A_REG_DEV1_CDPORT_MASK) + +#define RT8973A_REG_DEV2_JIG_USB_ON_SHIFT 0 +#define RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT 1 +#define RT8973A_REG_DEV2_JIG_UART_ON_SHIFT 2 +#define RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT 3 +#define RT8973A_REG_DEV2_JIG_USB_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_ON_SHIFT) +#define RT8973A_REG_DEV2_JIG_USB_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT) +#define RT8973A_REG_DEV2_JIG_UART_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_ON_SHIFT) +#define RT8973A_REG_DEV2_JIG_UART_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT) + +#define RT8973A_REG_MANUAL_SW1_DP_SHIFT 2 +#define RT8973A_REG_MANUAL_SW1_DM_SHIFT 5 +#define RT8973A_REG_MANUAL_SW1_DP_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DP_SHIFT) +#define RT8973A_REG_MANUAL_SW1_DM_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DM_SHIFT) +#define DM_DP_CON_SWITCH_OPEN 0x0 +#define DM_DP_CON_SWITCH_USB 0x1 +#define DM_DP_CON_SWITCH_UART 0x3 +#define DM_DP_SWITCH_OPEN ((DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DM_SHIFT)) +#define DM_DP_SWITCH_USB ((DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DM_SHIFT)) +#define DM_DP_SWITCH_UART ((DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DM_SHIFT)) + +#define RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT 0 +#define RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT 2 +#define RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT 3 +#define RT8973A_REG_MANUAL_SW2_FET_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT) +#define RT8973A_REG_MANUAL_SW2_JIG_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT) +#define RT8973A_REG_MANUAL_SW2_BOOT_SW_MASK (0x1 << RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT) +#define RT8973A_REG_MANUAL_SW2_FET_ON 0 +#define RT8973A_REG_MANUAL_SW2_FET_OFF 0x1 +#define RT8973A_REG_MANUAL_SW2_JIG_OFF 0 +#define RT8973A_REG_MANUAL_SW2_JIG_ON 0x1 +#define RT8973A_REG_MANUAL_SW2_BOOT_SW_ON 0 +#define RT8973A_REG_MANUAL_SW2_BOOT_SW_OFF 0x1 + +#define RT8973A_REG_RESET_SHIFT 0 +#define RT8973A_REG_RESET_MASK (0x1 << RT8973A_REG_RESET_SHIFT) +#define RT8973A_REG_RESET 0x1 + +/* RT8973A Interrupts */ +enum rt8973a_irq { + /* Interrupt1*/ + RT8973A_INT1_ATTACH, + RT8973A_INT1_DETACH, + RT8973A_INT1_CHGDET, + RT8973A_INT1_DCD_T, + RT8973A_INT1_OVP, + RT8973A_INT1_CONNECT, + RT8973A_INT1_ADC_CHG, + RT8973A_INT1_OTP, + + /* Interrupt2*/ + RT8973A_INT2_UVLO, + RT8973A_INT2_POR, + RT8973A_INT2_OTP_FET, + RT8973A_INT2_OVP_FET, + RT8973A_INT2_OCP_LATCH, + RT8973A_INT2_OCP, + RT8973A_INT2_OVP_OCP, + + RT8973A_NUM, +}; + +#define RT8973A_INT1_ATTACH_MASK BIT(0) +#define RT8973A_INT1_DETACH_MASK BIT(1) +#define RT8973A_INT1_CHGDET_MASK BIT(2) +#define RT8973A_INT1_DCD_T_MASK BIT(3) +#define RT8973A_INT1_OVP_MASK BIT(4) +#define RT8973A_INT1_CONNECT_MASK BIT(5) +#define RT8973A_INT1_ADC_CHG_MASK BIT(6) +#define RT8973A_INT1_OTP_MASK BIT(7) +#define RT8973A_INT2_UVLOT_MASK BIT(0) +#define RT8973A_INT2_POR_MASK BIT(1) +#define RT8973A_INT2_OTP_FET_MASK BIT(2) +#define RT8973A_INT2_OVP_FET_MASK BIT(3) +#define RT8973A_INT2_OCP_LATCH_MASK BIT(4) +#define RT8973A_INT2_OCP_MASK BIT(5) +#define RT8973A_INT2_OVP_OCP_MASK BIT(6) + +#endif /* __LINUX_EXTCON_RT8973A_H */ diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c new file mode 100644 index 000000000..59ec4c3e7 --- /dev/null +++ b/drivers/extcon/extcon-sm5502.c @@ -0,0 +1,714 @@ +/* + * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * Author: Chanwoo Choi <cw00.choi@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/extcon-provider.h> + +#include "extcon-sm5502.h" + +#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ + +struct muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +struct reg_data { + u8 reg; + unsigned int val; + bool invert; +}; + +struct sm5502_muic_info { + struct device *dev; + struct extcon_dev *edev; + + struct i2c_client *i2c; + struct regmap *regmap; + + struct regmap_irq_chip_data *irq_data; + struct muic_irq *muic_irqs; + unsigned int num_muic_irqs; + int irq; + bool irq_attach; + bool irq_detach; + struct work_struct irq_work; + + struct reg_data *reg_data; + unsigned int num_reg_data; + + struct mutex mutex; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; +}; + +/* Default value of SM5502 register to bring up MUIC device. */ +static struct reg_data sm5502_reg_data[] = { + { + .reg = SM5502_REG_RESET, + .val = SM5502_REG_RESET_MASK, + .invert = true, + }, { + .reg = SM5502_REG_CONTROL, + .val = SM5502_REG_CONTROL_MASK_INT_MASK, + .invert = false, + }, { + .reg = SM5502_REG_INTMASK1, + .val = SM5502_REG_INTM1_KP_MASK + | SM5502_REG_INTM1_LKP_MASK + | SM5502_REG_INTM1_LKR_MASK, + .invert = true, + }, { + .reg = SM5502_REG_INTMASK2, + .val = SM5502_REG_INTM2_VBUS_DET_MASK + | SM5502_REG_INTM2_REV_ACCE_MASK + | SM5502_REG_INTM2_ADC_CHG_MASK + | SM5502_REG_INTM2_STUCK_KEY_MASK + | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK + | SM5502_REG_INTM2_MHL_MASK, + .invert = true, + }, +}; + +/* List of detectable cables */ +static const unsigned int sm5502_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_SDP, + EXTCON_CHG_USB_DCP, + EXTCON_NONE, +}; + +/* Define supported accessory type */ +enum sm5502_muic_acc_type { + SM5502_MUIC_ADC_GROUND = 0x0, + SM5502_MUIC_ADC_SEND_END_BUTTON, + SM5502_MUIC_ADC_REMOTE_S1_BUTTON, + SM5502_MUIC_ADC_REMOTE_S2_BUTTON, + SM5502_MUIC_ADC_REMOTE_S3_BUTTON, + SM5502_MUIC_ADC_REMOTE_S4_BUTTON, + SM5502_MUIC_ADC_REMOTE_S5_BUTTON, + SM5502_MUIC_ADC_REMOTE_S6_BUTTON, + SM5502_MUIC_ADC_REMOTE_S7_BUTTON, + SM5502_MUIC_ADC_REMOTE_S8_BUTTON, + SM5502_MUIC_ADC_REMOTE_S9_BUTTON, + SM5502_MUIC_ADC_REMOTE_S10_BUTTON, + SM5502_MUIC_ADC_REMOTE_S11_BUTTON, + SM5502_MUIC_ADC_REMOTE_S12_BUTTON, + SM5502_MUIC_ADC_RESERVED_ACC_1, + SM5502_MUIC_ADC_RESERVED_ACC_2, + SM5502_MUIC_ADC_RESERVED_ACC_3, + SM5502_MUIC_ADC_RESERVED_ACC_4, + SM5502_MUIC_ADC_RESERVED_ACC_5, + SM5502_MUIC_ADC_AUDIO_TYPE2, + SM5502_MUIC_ADC_PHONE_POWERED_DEV, + SM5502_MUIC_ADC_TTY_CONVERTER, + SM5502_MUIC_ADC_UART_CABLE, + SM5502_MUIC_ADC_TYPE1_CHARGER, + SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, + SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, + SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, + SM5502_MUIC_ADC_TYPE2_CHARGER, + SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, + SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, + SM5502_MUIC_ADC_AUDIO_TYPE1, + SM5502_MUIC_ADC_OPEN = 0x1f, + + /* + * The below accessories have same ADC value (0x1f or 0x1e). + * So, Device type1 is used to separate specific accessory. + */ + /* |---------|--ADC| */ + /* | [7:5]|[4:0]| */ + SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ + SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ + /* |Dev Type1|--ADC| */ + SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ + SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ + SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ +}; + +/* List of supported interrupt for SM5502 */ +static struct muic_irq sm5502_muic_irqs[] = { + { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, + { SM5502_IRQ_INT1_DETACH, "muic-detach" }, + { SM5502_IRQ_INT1_KP, "muic-kp" }, + { SM5502_IRQ_INT1_LKP, "muic-lkp" }, + { SM5502_IRQ_INT1_LKR, "muic-lkr" }, + { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, + { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, + { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, + { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, + { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, + { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, + { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, + { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, + { SM5502_IRQ_INT2_MHL, "muic-mhl" }, +}; + +/* Define interrupt list of SM5502 to register regmap_irq */ +static const struct regmap_irq sm5502_irqs[] = { + /* INT1 interrupts */ + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, + { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, + + /* INT2 interrupts */ + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, + { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, +}; + +static const struct regmap_irq_chip sm5502_muic_irq_chip = { + .name = "sm5502", + .status_base = SM5502_REG_INT1, + .mask_base = SM5502_REG_INTMASK1, + .mask_invert = false, + .num_regs = 2, + .irqs = sm5502_irqs, + .num_irqs = ARRAY_SIZE(sm5502_irqs), +}; + +/* Define regmap configuration of SM5502 for I2C communication */ +static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SM5502_REG_INTMASK1: + case SM5502_REG_INTMASK2: + return true; + default: + break; + } + return false; +} + +static const struct regmap_config sm5502_muic_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = sm5502_muic_volatile_reg, + .max_register = SM5502_REG_END, +}; + +/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ +static int sm5502_muic_set_path(struct sm5502_muic_info *info, + unsigned int con_sw, unsigned int vbus_sw, + bool attached) +{ + int ret; + + if (!attached) { + con_sw = DM_DP_SWITCH_OPEN; + vbus_sw = VBUSIN_SWITCH_OPEN; + } + + switch (con_sw) { + case DM_DP_SWITCH_OPEN: + case DM_DP_SWITCH_USB: + case DM_DP_SWITCH_AUDIO: + case DM_DP_SWITCH_UART: + ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, + SM5502_REG_MANUAL_SW1_DP_MASK | + SM5502_REG_MANUAL_SW1_DM_MASK, + con_sw); + if (ret < 0) { + dev_err(info->dev, + "cannot update DM_CON/DP_CON switch\n"); + return ret; + } + break; + default: + dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", + con_sw); + return -EINVAL; + }; + + switch (vbus_sw) { + case VBUSIN_SWITCH_OPEN: + case VBUSIN_SWITCH_VBUSOUT: + case VBUSIN_SWITCH_MIC: + case VBUSIN_SWITCH_VBUSOUT_WITH_USB: + ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, + SM5502_REG_MANUAL_SW1_VBUSIN_MASK, + vbus_sw); + if (ret < 0) { + dev_err(info->dev, + "cannot update VBUSIN switch\n"); + return ret; + } + break; + default: + dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); + return -EINVAL; + }; + + return 0; +} + +/* Return cable type of attached or detached accessories */ +static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) +{ + unsigned int cable_type = -1, adc, dev_type1; + int ret; + + /* Read ADC value according to external cable or button */ + ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); + if (ret) { + dev_err(info->dev, "failed to read ADC register\n"); + return ret; + } + + /* + * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't + * connected with to MUIC device. + */ + cable_type = adc & SM5502_REG_ADC_MASK; + if (cable_type == SM5502_MUIC_ADC_GROUND) + return SM5502_MUIC_ADC_GROUND; + + switch (cable_type) { + case SM5502_MUIC_ADC_GROUND: + case SM5502_MUIC_ADC_SEND_END_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: + case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: + case SM5502_MUIC_ADC_RESERVED_ACC_1: + case SM5502_MUIC_ADC_RESERVED_ACC_2: + case SM5502_MUIC_ADC_RESERVED_ACC_3: + case SM5502_MUIC_ADC_RESERVED_ACC_4: + case SM5502_MUIC_ADC_RESERVED_ACC_5: + case SM5502_MUIC_ADC_AUDIO_TYPE2: + case SM5502_MUIC_ADC_PHONE_POWERED_DEV: + case SM5502_MUIC_ADC_TTY_CONVERTER: + case SM5502_MUIC_ADC_UART_CABLE: + case SM5502_MUIC_ADC_TYPE1_CHARGER: + case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: + case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: + case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: + case SM5502_MUIC_ADC_TYPE2_CHARGER: + case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: + case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: + break; + case SM5502_MUIC_ADC_AUDIO_TYPE1: + /* + * Check whether cable type is + * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE + * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END + * by using Button event. + */ + break; + case SM5502_MUIC_ADC_OPEN: + ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, + &dev_type1); + if (ret) { + dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); + return ret; + } + + switch (dev_type1) { + case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: + cable_type = SM5502_MUIC_ADC_OPEN_USB; + break; + case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: + cable_type = SM5502_MUIC_ADC_OPEN_TA; + break; + case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: + cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; + break; + default: + dev_dbg(info->dev, + "cannot identify the cable type: adc(0x%x)\n", + adc); + return -EINVAL; + }; + break; + default: + dev_err(info->dev, + "failed to identify the cable type: adc(0x%x)\n", adc); + return -EINVAL; + }; + + return cable_type; +} + +static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, + bool attached) +{ + static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; + unsigned int cable_type = SM5502_MUIC_ADC_GROUND; + unsigned int con_sw = DM_DP_SWITCH_OPEN; + unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; + unsigned int id; + int ret; + + /* Get the type of attached or detached cable */ + if (attached) + cable_type = sm5502_muic_get_cable_type(info); + else + cable_type = prev_cable_type; + prev_cable_type = cable_type; + + switch (cable_type) { + case SM5502_MUIC_ADC_OPEN_USB: + id = EXTCON_USB; + con_sw = DM_DP_SWITCH_USB; + vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; + break; + case SM5502_MUIC_ADC_OPEN_TA: + id = EXTCON_CHG_USB_DCP; + con_sw = DM_DP_SWITCH_OPEN; + vbus_sw = VBUSIN_SWITCH_VBUSOUT; + break; + case SM5502_MUIC_ADC_OPEN_USB_OTG: + id = EXTCON_USB_HOST; + con_sw = DM_DP_SWITCH_USB; + vbus_sw = VBUSIN_SWITCH_OPEN; + break; + default: + dev_dbg(info->dev, + "cannot handle this cable_type (0x%x)\n", cable_type); + return 0; + }; + + /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ + ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); + if (ret < 0) + return ret; + + /* Change the state of external accessory */ + extcon_set_state_sync(info->edev, id, attached); + if (id == EXTCON_USB) + extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, + attached); + + return 0; +} + +static void sm5502_muic_irq_work(struct work_struct *work) +{ + struct sm5502_muic_info *info = container_of(work, + struct sm5502_muic_info, irq_work); + int ret = 0; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + /* Detect attached or detached cables */ + if (info->irq_attach) { + ret = sm5502_muic_cable_handler(info, true); + info->irq_attach = false; + } + if (info->irq_detach) { + ret = sm5502_muic_cable_handler(info, false); + info->irq_detach = false; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +/* + * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. + * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. + */ +static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) +{ + switch (irq_type) { + case SM5502_IRQ_INT1_ATTACH: + info->irq_attach = true; + break; + case SM5502_IRQ_INT1_DETACH: + info->irq_detach = true; + break; + case SM5502_IRQ_INT1_KP: + case SM5502_IRQ_INT1_LKP: + case SM5502_IRQ_INT1_LKR: + case SM5502_IRQ_INT1_OVP_EVENT: + case SM5502_IRQ_INT1_OCP_EVENT: + case SM5502_IRQ_INT1_OVP_OCP_DIS: + case SM5502_IRQ_INT2_VBUS_DET: + case SM5502_IRQ_INT2_REV_ACCE: + case SM5502_IRQ_INT2_ADC_CHG: + case SM5502_IRQ_INT2_STUCK_KEY: + case SM5502_IRQ_INT2_STUCK_KEY_RCV: + case SM5502_IRQ_INT2_MHL: + default: + break; + } + + return 0; +} + +static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) +{ + struct sm5502_muic_info *info = data; + int i, irq_type = -1, ret; + + for (i = 0; i < info->num_muic_irqs; i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->muic_irqs[i].irq; + + ret = sm5502_parse_irq(info, irq_type); + if (ret < 0) { + dev_warn(info->dev, "cannot handle is interrupt:%d\n", + irq_type); + return IRQ_HANDLED; + } + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static void sm5502_muic_detect_cable_wq(struct work_struct *work) +{ + struct sm5502_muic_info *info = container_of(to_delayed_work(work), + struct sm5502_muic_info, wq_detcable); + int ret; + + /* Notify the state of connector cable or not */ + ret = sm5502_muic_cable_handler(info, true); + if (ret < 0) + dev_warn(info->dev, "failed to detect cable state\n"); +} + +static void sm5502_init_dev_type(struct sm5502_muic_info *info) +{ + unsigned int reg_data, vendor_id, version_id; + int i, ret; + + /* To test I2C, Print version_id and vendor_id of SM5502 */ + ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); + if (ret) { + dev_err(info->dev, + "failed to read DEVICE_ID register: %d\n", ret); + return; + } + + vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> + SM5502_REG_DEVICE_ID_VENDOR_SHIFT); + version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> + SM5502_REG_DEVICE_ID_VERSION_SHIFT); + + dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", + version_id, vendor_id); + + /* Initiazle the register of SM5502 device to bring-up */ + for (i = 0; i < info->num_reg_data; i++) { + unsigned int val = 0; + + if (!info->reg_data[i].invert) + val |= ~info->reg_data[i].val; + else + val = info->reg_data[i].val; + regmap_write(info->regmap, info->reg_data[i].reg, val); + } +} + +static int sm5022_muic_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device_node *np = i2c->dev.of_node; + struct sm5502_muic_info *info; + int i, ret, irq_flags; + + if (!np) + return -EINVAL; + + info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + i2c_set_clientdata(i2c, info); + + info->dev = &i2c->dev; + info->i2c = i2c; + info->irq = i2c->irq; + info->muic_irqs = sm5502_muic_irqs; + info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs); + info->reg_data = sm5502_reg_data; + info->num_reg_data = ARRAY_SIZE(sm5502_reg_data); + + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, sm5502_muic_irq_work); + + info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(info->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + /* Support irq domain for SM5502 MUIC device */ + irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; + ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, + &sm5502_muic_irq_chip, &info->irq_data); + if (ret != 0) { + dev_err(info->dev, "failed to request IRQ %d: %d\n", + info->irq, ret); + return ret; + } + + for (i = 0; i < info->num_muic_irqs; i++) { + struct muic_irq *muic_irq = &info->muic_irqs[i]; + int virq = 0; + + virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); + if (virq <= 0) + return -EINVAL; + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(info->dev, virq, NULL, + sm5502_muic_irq_handler, + IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(info->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + return ret; + } + } + + /* Allocate extcon device */ + info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(info->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + + /* Register extcon device */ + ret = devm_extcon_dev_register(info->dev, info->edev); + if (ret) { + dev_err(info->dev, "failed to register extcon device\n"); + return ret; + } + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + msecs_to_jiffies(DELAY_MS_DEFAULT)); + + /* Initialize SM5502 device and print vendor id and version id */ + sm5502_init_dev_type(info); + + return 0; +} + +static int sm5502_muic_i2c_remove(struct i2c_client *i2c) +{ + struct sm5502_muic_info *info = i2c_get_clientdata(i2c); + + regmap_del_irq_chip(info->irq, info->irq_data); + + return 0; +} + +static const struct of_device_id sm5502_dt_match[] = { + { .compatible = "siliconmitus,sm5502-muic" }, + { }, +}; +MODULE_DEVICE_TABLE(of, sm5502_dt_match); + +#ifdef CONFIG_PM_SLEEP +static int sm5502_muic_suspend(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + struct sm5502_muic_info *info = i2c_get_clientdata(i2c); + + enable_irq_wake(info->irq); + + return 0; +} + +static int sm5502_muic_resume(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + struct sm5502_muic_info *info = i2c_get_clientdata(i2c); + + disable_irq_wake(info->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, + sm5502_muic_suspend, sm5502_muic_resume); + +static const struct i2c_device_id sm5502_i2c_id[] = { + { "sm5502", TYPE_SM5502 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); + +static struct i2c_driver sm5502_muic_i2c_driver = { + .driver = { + .name = "sm5502", + .pm = &sm5502_muic_pm_ops, + .of_match_table = sm5502_dt_match, + }, + .probe = sm5022_muic_i2c_probe, + .remove = sm5502_muic_i2c_remove, + .id_table = sm5502_i2c_id, +}; + +static int __init sm5502_muic_i2c_init(void) +{ + return i2c_add_driver(&sm5502_muic_i2c_driver); +} +subsys_initcall(sm5502_muic_i2c_init); + +MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-sm5502.h b/drivers/extcon/extcon-sm5502.h new file mode 100644 index 000000000..12f8b01e5 --- /dev/null +++ b/drivers/extcon/extcon-sm5502.h @@ -0,0 +1,284 @@ +/* + * sm5502.h + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __LINUX_EXTCON_SM5502_H +#define __LINUX_EXTCON_SM5502_H + +enum sm5502_types { + TYPE_SM5502, +}; + +/* SM5502 registers */ +enum sm5502_reg { + SM5502_REG_DEVICE_ID = 0x01, + SM5502_REG_CONTROL, + SM5502_REG_INT1, + SM5502_REG_INT2, + SM5502_REG_INTMASK1, + SM5502_REG_INTMASK2, + SM5502_REG_ADC, + SM5502_REG_TIMING_SET1, + SM5502_REG_TIMING_SET2, + SM5502_REG_DEV_TYPE1, + SM5502_REG_DEV_TYPE2, + SM5502_REG_BUTTON1, + SM5502_REG_BUTTON2, + SM5502_REG_CAR_KIT_STATUS, + SM5502_REG_RSVD1, + SM5502_REG_RSVD2, + SM5502_REG_RSVD3, + SM5502_REG_RSVD4, + SM5502_REG_MANUAL_SW1, + SM5502_REG_MANUAL_SW2, + SM5502_REG_DEV_TYPE3, + SM5502_REG_RSVD5, + SM5502_REG_RSVD6, + SM5502_REG_RSVD7, + SM5502_REG_RSVD8, + SM5502_REG_RSVD9, + SM5502_REG_RESET, + SM5502_REG_RSVD10, + SM5502_REG_RESERVED_ID1, + SM5502_REG_RSVD11, + SM5502_REG_RSVD12, + SM5502_REG_RESERVED_ID2, + SM5502_REG_RSVD13, + SM5502_REG_OCP, + SM5502_REG_RSVD14, + SM5502_REG_RSVD15, + SM5502_REG_RSVD16, + SM5502_REG_RSVD17, + SM5502_REG_RSVD18, + SM5502_REG_RSVD19, + SM5502_REG_RSVD20, + SM5502_REG_RSVD21, + SM5502_REG_RSVD22, + SM5502_REG_RSVD23, + SM5502_REG_RSVD24, + SM5502_REG_RSVD25, + SM5502_REG_RSVD26, + SM5502_REG_RSVD27, + SM5502_REG_RSVD28, + SM5502_REG_RSVD29, + SM5502_REG_RSVD30, + SM5502_REG_RSVD31, + SM5502_REG_RSVD32, + SM5502_REG_RSVD33, + SM5502_REG_RSVD34, + SM5502_REG_RSVD35, + SM5502_REG_RSVD36, + SM5502_REG_RESERVED_ID3, + + SM5502_REG_END, +}; + +/* Define SM5502 MASK/SHIFT constant */ +#define SM5502_REG_DEVICE_ID_VENDOR_SHIFT 0 +#define SM5502_REG_DEVICE_ID_VERSION_SHIFT 3 +#define SM5502_REG_DEVICE_ID_VENDOR_MASK (0x3 << SM5502_REG_DEVICE_ID_VENDOR_SHIFT) +#define SM5502_REG_DEVICE_ID_VERSION_MASK (0x1f << SM5502_REG_DEVICE_ID_VERSION_SHIFT) + +#define SM5502_REG_CONTROL_MASK_INT_SHIFT 0 +#define SM5502_REG_CONTROL_WAIT_SHIFT 1 +#define SM5502_REG_CONTROL_MANUAL_SW_SHIFT 2 +#define SM5502_REG_CONTROL_RAW_DATA_SHIFT 3 +#define SM5502_REG_CONTROL_SW_OPEN_SHIFT 4 +#define SM5502_REG_CONTROL_MASK_INT_MASK (0x1 << SM5502_REG_CONTROL_MASK_INT_SHIFT) +#define SM5502_REG_CONTROL_WAIT_MASK (0x1 << SM5502_REG_CONTROL_WAIT_SHIFT) +#define SM5502_REG_CONTROL_MANUAL_SW_MASK (0x1 << SM5502_REG_CONTROL_MANUAL_SW_SHIFT) +#define SM5502_REG_CONTROL_RAW_DATA_MASK (0x1 << SM5502_REG_CONTROL_RAW_DATA_SHIFT) +#define SM5502_REG_CONTROL_SW_OPEN_MASK (0x1 << SM5502_REG_CONTROL_SW_OPEN_SHIFT) + +#define SM5502_REG_INTM1_ATTACH_SHIFT 0 +#define SM5502_REG_INTM1_DETACH_SHIFT 1 +#define SM5502_REG_INTM1_KP_SHIFT 2 +#define SM5502_REG_INTM1_LKP_SHIFT 3 +#define SM5502_REG_INTM1_LKR_SHIFT 4 +#define SM5502_REG_INTM1_OVP_EVENT_SHIFT 5 +#define SM5502_REG_INTM1_OCP_EVENT_SHIFT 6 +#define SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT 7 +#define SM5502_REG_INTM1_ATTACH_MASK (0x1 << SM5502_REG_INTM1_ATTACH_SHIFT) +#define SM5502_REG_INTM1_DETACH_MASK (0x1 << SM5502_REG_INTM1_DETACH_SHIFT) +#define SM5502_REG_INTM1_KP_MASK (0x1 << SM5502_REG_INTM1_KP_SHIFT) +#define SM5502_REG_INTM1_LKP_MASK (0x1 << SM5502_REG_INTM1_LKP_SHIFT) +#define SM5502_REG_INTM1_LKR_MASK (0x1 << SM5502_REG_INTM1_LKR_SHIFT) +#define SM5502_REG_INTM1_OVP_EVENT_MASK (0x1 << SM5502_REG_INTM1_OVP_EVENT_SHIFT) +#define SM5502_REG_INTM1_OCP_EVENT_MASK (0x1 << SM5502_REG_INTM1_OCP_EVENT_SHIFT) +#define SM5502_REG_INTM1_OVP_OCP_DIS_MASK (0x1 << SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT) + +#define SM5502_REG_INTM2_VBUS_DET_SHIFT 0 +#define SM5502_REG_INTM2_REV_ACCE_SHIFT 1 +#define SM5502_REG_INTM2_ADC_CHG_SHIFT 2 +#define SM5502_REG_INTM2_STUCK_KEY_SHIFT 3 +#define SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT 4 +#define SM5502_REG_INTM2_MHL_SHIFT 5 +#define SM5502_REG_INTM2_VBUS_DET_MASK (0x1 << SM5502_REG_INTM2_VBUS_DET_SHIFT) +#define SM5502_REG_INTM2_REV_ACCE_MASK (0x1 << SM5502_REG_INTM2_REV_ACCE_SHIFT) +#define SM5502_REG_INTM2_ADC_CHG_MASK (0x1 << SM5502_REG_INTM2_ADC_CHG_SHIFT) +#define SM5502_REG_INTM2_STUCK_KEY_MASK (0x1 << SM5502_REG_INTM2_STUCK_KEY_SHIFT) +#define SM5502_REG_INTM2_STUCK_KEY_RCV_MASK (0x1 << SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT) +#define SM5502_REG_INTM2_MHL_MASK (0x1 << SM5502_REG_INTM2_MHL_SHIFT) + +#define SM5502_REG_ADC_SHIFT 0 +#define SM5502_REG_ADC_MASK (0x1f << SM5502_REG_ADC_SHIFT) + +#define SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT 4 +#define SM5502_REG_TIMING_SET1_KEY_PRESS_MASK (0xf << SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT) +#define TIMING_KEY_PRESS_100MS 0x0 +#define TIMING_KEY_PRESS_200MS 0x1 +#define TIMING_KEY_PRESS_300MS 0x2 +#define TIMING_KEY_PRESS_400MS 0x3 +#define TIMING_KEY_PRESS_500MS 0x4 +#define TIMING_KEY_PRESS_600MS 0x5 +#define TIMING_KEY_PRESS_700MS 0x6 +#define TIMING_KEY_PRESS_800MS 0x7 +#define TIMING_KEY_PRESS_900MS 0x8 +#define TIMING_KEY_PRESS_1000MS 0x9 +#define SM5502_REG_TIMING_SET1_ADC_DET_SHIFT 0 +#define SM5502_REG_TIMING_SET1_ADC_DET_MASK (0xf << SM5502_REG_TIMING_SET1_ADC_DET_SHIFT) +#define TIMING_ADC_DET_50MS 0x0 +#define TIMING_ADC_DET_100MS 0x1 +#define TIMING_ADC_DET_150MS 0x2 +#define TIMING_ADC_DET_200MS 0x3 +#define TIMING_ADC_DET_300MS 0x4 +#define TIMING_ADC_DET_400MS 0x5 +#define TIMING_ADC_DET_500MS 0x6 +#define TIMING_ADC_DET_600MS 0x7 +#define TIMING_ADC_DET_700MS 0x8 +#define TIMING_ADC_DET_800MS 0x9 +#define TIMING_ADC_DET_900MS 0xA +#define TIMING_ADC_DET_1000MS 0xB + +#define SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT 4 +#define SM5502_REG_TIMING_SET2_SW_WAIT_MASK (0xf << SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT) +#define TIMING_SW_WAIT_10MS 0x0 +#define TIMING_SW_WAIT_30MS 0x1 +#define TIMING_SW_WAIT_50MS 0x2 +#define TIMING_SW_WAIT_70MS 0x3 +#define TIMING_SW_WAIT_90MS 0x4 +#define TIMING_SW_WAIT_110MS 0x5 +#define TIMING_SW_WAIT_130MS 0x6 +#define TIMING_SW_WAIT_150MS 0x7 +#define TIMING_SW_WAIT_170MS 0x8 +#define TIMING_SW_WAIT_190MS 0x9 +#define TIMING_SW_WAIT_210MS 0xA +#define SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT 0 +#define SM5502_REG_TIMING_SET2_LONG_KEY_MASK (0xf << SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT) +#define TIMING_LONG_KEY_300MS 0x0 +#define TIMING_LONG_KEY_400MS 0x1 +#define TIMING_LONG_KEY_500MS 0x2 +#define TIMING_LONG_KEY_600MS 0x3 +#define TIMING_LONG_KEY_700MS 0x4 +#define TIMING_LONG_KEY_800MS 0x5 +#define TIMING_LONG_KEY_900MS 0x6 +#define TIMING_LONG_KEY_1000MS 0x7 +#define TIMING_LONG_KEY_1100MS 0x8 +#define TIMING_LONG_KEY_1200MS 0x9 +#define TIMING_LONG_KEY_1300MS 0xA +#define TIMING_LONG_KEY_1400MS 0xB +#define TIMING_LONG_KEY_1500MS 0xC + +#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT 0 +#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT 1 +#define SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT 2 +#define SM5502_REG_DEV_TYPE1_UART_SHIFT 3 +#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT 4 +#define SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT 5 +#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT 6 +#define SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT 7 +#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_MASK (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT) +#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1__MASK (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT) +#define SM5502_REG_DEV_TYPE1_USB_SDP_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT) +#define SM5502_REG_DEV_TYPE1_UART_MASK (0x1 << SM5502_REG_DEV_TYPE1_UART_SHIFT) +#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_MASK (0x1 << SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT) +#define SM5502_REG_DEV_TYPE1_USB_CHG_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT) +#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK (0x1 << SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT) +#define SM5502_REG_DEV_TYPE1_USB_OTG_MASK (0x1 << SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT) + +#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT 0 +#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT 1 +#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT 2 +#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT 3 +#define SM5502_REG_DEV_TYPE2_PPD_SHIFT 4 +#define SM5502_REG_DEV_TYPE2_TTY_SHIFT 5 +#define SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT 6 +#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT) +#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT) +#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT) +#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_MASK (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT) +#define SM5502_REG_DEV_TYPE2_PPD_MASK (0x1 << SM5502_REG_DEV_TYPE2_PPD_SHIFT) +#define SM5502_REG_DEV_TYPE2_TTY_MASK (0x1 << SM5502_REG_DEV_TYPE2_TTY_SHIFT) +#define SM5502_REG_DEV_TYPE2_AV_CABLE_MASK (0x1 << SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT) + +#define SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT 0 +#define SM5502_REG_MANUAL_SW1_DP_SHIFT 2 +#define SM5502_REG_MANUAL_SW1_DM_SHIFT 5 +#define SM5502_REG_MANUAL_SW1_VBUSIN_MASK (0x3 << SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT) +#define SM5502_REG_MANUAL_SW1_DP_MASK (0x7 << SM5502_REG_MANUAL_SW1_DP_SHIFT) +#define SM5502_REG_MANUAL_SW1_DM_MASK (0x7 << SM5502_REG_MANUAL_SW1_DM_SHIFT) +#define VBUSIN_SWITCH_OPEN 0x0 +#define VBUSIN_SWITCH_VBUSOUT 0x1 +#define VBUSIN_SWITCH_MIC 0x2 +#define VBUSIN_SWITCH_VBUSOUT_WITH_USB 0x3 +#define DM_DP_CON_SWITCH_OPEN 0x0 +#define DM_DP_CON_SWITCH_USB 0x1 +#define DM_DP_CON_SWITCH_AUDIO 0x2 +#define DM_DP_CON_SWITCH_UART 0x3 +#define DM_DP_SWITCH_OPEN ((DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DM_SHIFT)) +#define DM_DP_SWITCH_USB ((DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DM_SHIFT)) +#define DM_DP_SWITCH_AUDIO ((DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DM_SHIFT)) +#define DM_DP_SWITCH_UART ((DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \ + | (DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DM_SHIFT)) + +#define SM5502_REG_RESET_MASK (0x1) + +/* SM5502 Interrupts */ +enum sm5502_irq { + /* INT1 */ + SM5502_IRQ_INT1_ATTACH, + SM5502_IRQ_INT1_DETACH, + SM5502_IRQ_INT1_KP, + SM5502_IRQ_INT1_LKP, + SM5502_IRQ_INT1_LKR, + SM5502_IRQ_INT1_OVP_EVENT, + SM5502_IRQ_INT1_OCP_EVENT, + SM5502_IRQ_INT1_OVP_OCP_DIS, + + /* INT2 */ + SM5502_IRQ_INT2_VBUS_DET, + SM5502_IRQ_INT2_REV_ACCE, + SM5502_IRQ_INT2_ADC_CHG, + SM5502_IRQ_INT2_STUCK_KEY, + SM5502_IRQ_INT2_STUCK_KEY_RCV, + SM5502_IRQ_INT2_MHL, + + SM5502_IRQ_NUM, +}; + +#define SM5502_IRQ_INT1_ATTACH_MASK BIT(0) +#define SM5502_IRQ_INT1_DETACH_MASK BIT(1) +#define SM5502_IRQ_INT1_KP_MASK BIT(2) +#define SM5502_IRQ_INT1_LKP_MASK BIT(3) +#define SM5502_IRQ_INT1_LKR_MASK BIT(4) +#define SM5502_IRQ_INT1_OVP_EVENT_MASK BIT(5) +#define SM5502_IRQ_INT1_OCP_EVENT_MASK BIT(6) +#define SM5502_IRQ_INT1_OVP_OCP_DIS_MASK BIT(7) +#define SM5502_IRQ_INT2_VBUS_DET_MASK BIT(0) +#define SM5502_IRQ_INT2_REV_ACCE_MASK BIT(1) +#define SM5502_IRQ_INT2_ADC_CHG_MASK BIT(2) +#define SM5502_IRQ_INT2_STUCK_KEY_MASK BIT(3) +#define SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK BIT(4) +#define SM5502_IRQ_INT2_MHL_MASK BIT(5) + +#endif /* __LINUX_EXTCON_SM5502_H */ diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c new file mode 100644 index 000000000..53762864a --- /dev/null +++ b/drivers/extcon/extcon-usb-gpio.c @@ -0,0 +1,321 @@ +/** + * drivers/extcon/extcon-usb-gpio.c - USB GPIO extcon driver + * + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com + * Author: Roger Quadros <rogerq@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/extcon-provider.h> +#include <linux/gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/pinctrl/consumer.h> + +#define USB_GPIO_DEBOUNCE_MS 20 /* ms */ + +struct usb_extcon_info { + struct device *dev; + struct extcon_dev *edev; + + struct gpio_desc *id_gpiod; + struct gpio_desc *vbus_gpiod; + int id_irq; + int vbus_irq; + + unsigned long debounce_jiffies; + struct delayed_work wq_detcable; +}; + +static const unsigned int usb_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +/* + * "USB" = VBUS and "USB-HOST" = !ID, so we have: + * Both "USB" and "USB-HOST" can't be set as active at the + * same time so if "USB-HOST" is active (i.e. ID is 0) we keep "USB" inactive + * even if VBUS is on. + * + * State | ID | VBUS + * ---------------------------------------- + * [1] USB | H | H + * [2] none | H | L + * [3] USB-HOST | L | H + * [4] USB-HOST | L | L + * + * In case we have only one of these signals: + * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1. + * - ID only - we want to distinguish between [1] and [4], so VBUS = ID. +*/ +static void usb_extcon_detect_cable(struct work_struct *work) +{ + int id, vbus; + struct usb_extcon_info *info = container_of(to_delayed_work(work), + struct usb_extcon_info, + wq_detcable); + + /* check ID and VBUS and update cable state */ + id = info->id_gpiod ? + gpiod_get_value_cansleep(info->id_gpiod) : 1; + vbus = info->vbus_gpiod ? + gpiod_get_value_cansleep(info->vbus_gpiod) : id; + + /* at first we clean states which are no longer active */ + if (id) + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false); + if (!vbus) + extcon_set_state_sync(info->edev, EXTCON_USB, false); + + if (!id) { + extcon_set_state_sync(info->edev, EXTCON_USB_HOST, true); + } else { + if (vbus) + extcon_set_state_sync(info->edev, EXTCON_USB, true); + } +} + +static irqreturn_t usb_irq_handler(int irq, void *dev_id) +{ + struct usb_extcon_info *info = dev_id; + + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + info->debounce_jiffies); + + return IRQ_HANDLED; +} + +static int usb_extcon_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct usb_extcon_info *info; + int ret; + + if (!np) + return -EINVAL; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = dev; + info->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id", GPIOD_IN); + info->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus", + GPIOD_IN); + + if (!info->id_gpiod && !info->vbus_gpiod) { + dev_err(dev, "failed to get gpios\n"); + return -ENODEV; + } + + if (IS_ERR(info->id_gpiod)) + return PTR_ERR(info->id_gpiod); + + if (IS_ERR(info->vbus_gpiod)) + return PTR_ERR(info->vbus_gpiod); + + info->edev = devm_extcon_dev_allocate(dev, usb_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(dev, info->edev); + if (ret < 0) { + dev_err(dev, "failed to register extcon device\n"); + return ret; + } + + if (info->id_gpiod) + ret = gpiod_set_debounce(info->id_gpiod, + USB_GPIO_DEBOUNCE_MS * 1000); + if (!ret && info->vbus_gpiod) + ret = gpiod_set_debounce(info->vbus_gpiod, + USB_GPIO_DEBOUNCE_MS * 1000); + + if (ret < 0) + info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEBOUNCE_MS); + + INIT_DELAYED_WORK(&info->wq_detcable, usb_extcon_detect_cable); + + if (info->id_gpiod) { + info->id_irq = gpiod_to_irq(info->id_gpiod); + if (info->id_irq < 0) { + dev_err(dev, "failed to get ID IRQ\n"); + return info->id_irq; + } + + ret = devm_request_threaded_irq(dev, info->id_irq, NULL, + usb_irq_handler, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + pdev->name, info); + if (ret < 0) { + dev_err(dev, "failed to request handler for ID IRQ\n"); + return ret; + } + } + + if (info->vbus_gpiod) { + info->vbus_irq = gpiod_to_irq(info->vbus_gpiod); + if (info->vbus_irq < 0) { + dev_err(dev, "failed to get VBUS IRQ\n"); + return info->vbus_irq; + } + + ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL, + usb_irq_handler, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + pdev->name, info); + if (ret < 0) { + dev_err(dev, "failed to request handler for VBUS IRQ\n"); + return ret; + } + } + + platform_set_drvdata(pdev, info); + device_set_wakeup_capable(&pdev->dev, true); + + /* Perform initial detection */ + usb_extcon_detect_cable(&info->wq_detcable.work); + + return 0; +} + +static int usb_extcon_remove(struct platform_device *pdev) +{ + struct usb_extcon_info *info = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&info->wq_detcable); + device_init_wakeup(&pdev->dev, false); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int usb_extcon_suspend(struct device *dev) +{ + struct usb_extcon_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (device_may_wakeup(dev)) { + if (info->id_gpiod) { + ret = enable_irq_wake(info->id_irq); + if (ret) + return ret; + } + if (info->vbus_gpiod) { + ret = enable_irq_wake(info->vbus_irq); + if (ret) { + if (info->id_gpiod) + disable_irq_wake(info->id_irq); + + return ret; + } + } + } + + /* + * We don't want to process any IRQs after this point + * as GPIOs used behind I2C subsystem might not be + * accessible until resume completes. So disable IRQ. + */ + if (info->id_gpiod) + disable_irq(info->id_irq); + if (info->vbus_gpiod) + disable_irq(info->vbus_irq); + + if (!device_may_wakeup(dev)) + pinctrl_pm_select_sleep_state(dev); + + return ret; +} + +static int usb_extcon_resume(struct device *dev) +{ + struct usb_extcon_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (!device_may_wakeup(dev)) + pinctrl_pm_select_default_state(dev); + + if (device_may_wakeup(dev)) { + if (info->id_gpiod) { + ret = disable_irq_wake(info->id_irq); + if (ret) + return ret; + } + if (info->vbus_gpiod) { + ret = disable_irq_wake(info->vbus_irq); + if (ret) { + if (info->id_gpiod) + enable_irq_wake(info->id_irq); + + return ret; + } + } + } + + if (info->id_gpiod) + enable_irq(info->id_irq); + if (info->vbus_gpiod) + enable_irq(info->vbus_irq); + + queue_delayed_work(system_power_efficient_wq, + &info->wq_detcable, 0); + + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(usb_extcon_pm_ops, + usb_extcon_suspend, usb_extcon_resume); + +static const struct of_device_id usb_extcon_dt_match[] = { + { .compatible = "linux,extcon-usb-gpio", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, usb_extcon_dt_match); + +static const struct platform_device_id usb_extcon_platform_ids[] = { + { .name = "extcon-usb-gpio", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, usb_extcon_platform_ids); + +static struct platform_driver usb_extcon_driver = { + .probe = usb_extcon_probe, + .remove = usb_extcon_remove, + .driver = { + .name = "extcon-usb-gpio", + .pm = &usb_extcon_pm_ops, + .of_match_table = usb_extcon_dt_match, + }, + .id_table = usb_extcon_platform_ids, +}; + +module_platform_driver(usb_extcon_driver); + +MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); +MODULE_DESCRIPTION("USB GPIO extcon driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon-usbc-cros-ec.c b/drivers/extcon/extcon-usbc-cros-ec.c new file mode 100644 index 000000000..43c0a936a --- /dev/null +++ b/drivers/extcon/extcon-usbc-cros-ec.c @@ -0,0 +1,541 @@ +// SPDX-License-Identifier: GPL-2.0 +// ChromeOS Embedded Controller extcon +// +// Copyright (C) 2017 Google, Inc. +// Author: Benson Leung <bleung@chromium.org> + +#include <linux/extcon-provider.h> +#include <linux/kernel.h> +#include <linux/mfd/cros_ec.h> +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/sched.h> + +struct cros_ec_extcon_info { + struct device *dev; + struct extcon_dev *edev; + + int port_id; + + struct cros_ec_device *ec; + + struct notifier_block notifier; + + unsigned int dr; /* data role */ + bool pr; /* power role (true if VBUS enabled) */ + bool dp; /* DisplayPort enabled */ + bool mux; /* SuperSpeed (usb3) enabled */ + unsigned int power_type; +}; + +static const unsigned int usb_type_c_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_DISP_DP, + EXTCON_NONE, +}; + +enum usb_data_roles { + DR_NONE, + DR_HOST, + DR_DEVICE, +}; + +/** + * cros_ec_pd_command() - Send a command to the EC. + * @info: pointer to struct cros_ec_extcon_info + * @command: EC command + * @version: EC command version + * @outdata: EC command output data + * @outsize: Size of outdata + * @indata: EC command input data + * @insize: Size of indata + * + * Return: 0 on success, <0 on failure. + */ +static int cros_ec_pd_command(struct cros_ec_extcon_info *info, + unsigned int command, + unsigned int version, + void *outdata, + unsigned int outsize, + void *indata, + unsigned int insize) +{ + struct cros_ec_command *msg; + int ret; + + msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->version = version; + msg->command = command; + msg->outsize = outsize; + msg->insize = insize; + + if (outsize) + memcpy(msg->data, outdata, outsize); + + ret = cros_ec_cmd_xfer_status(info->ec, msg); + if (ret >= 0 && insize) + memcpy(indata, msg->data, insize); + + kfree(msg); + return ret; +} + +/** + * cros_ec_usb_get_power_type() - Get power type info about PD device attached + * to given port. + * @info: pointer to struct cros_ec_extcon_info + * + * Return: power type on success, <0 on failure. + */ +static int cros_ec_usb_get_power_type(struct cros_ec_extcon_info *info) +{ + struct ec_params_usb_pd_power_info req; + struct ec_response_usb_pd_power_info resp; + int ret; + + req.port = info->port_id; + ret = cros_ec_pd_command(info, EC_CMD_USB_PD_POWER_INFO, 0, + &req, sizeof(req), &resp, sizeof(resp)); + if (ret < 0) + return ret; + + return resp.type; +} + +/** + * cros_ec_usb_get_pd_mux_state() - Get PD mux state for given port. + * @info: pointer to struct cros_ec_extcon_info + * + * Return: PD mux state on success, <0 on failure. + */ +static int cros_ec_usb_get_pd_mux_state(struct cros_ec_extcon_info *info) +{ + struct ec_params_usb_pd_mux_info req; + struct ec_response_usb_pd_mux_info resp; + int ret; + + req.port = info->port_id; + ret = cros_ec_pd_command(info, EC_CMD_USB_PD_MUX_INFO, 0, + &req, sizeof(req), + &resp, sizeof(resp)); + if (ret < 0) + return ret; + + return resp.flags; +} + +/** + * cros_ec_usb_get_role() - Get role info about possible PD device attached to a + * given port. + * @info: pointer to struct cros_ec_extcon_info + * @polarity: pointer to cable polarity (return value) + * + * Return: role info on success, -ENOTCONN if no cable is connected, <0 on + * failure. + */ +static int cros_ec_usb_get_role(struct cros_ec_extcon_info *info, + bool *polarity) +{ + struct ec_params_usb_pd_control pd_control; + struct ec_response_usb_pd_control_v1 resp; + int ret; + + pd_control.port = info->port_id; + pd_control.role = USB_PD_CTRL_ROLE_NO_CHANGE; + pd_control.mux = USB_PD_CTRL_MUX_NO_CHANGE; + pd_control.swap = USB_PD_CTRL_SWAP_NONE; + ret = cros_ec_pd_command(info, EC_CMD_USB_PD_CONTROL, 1, + &pd_control, sizeof(pd_control), + &resp, sizeof(resp)); + if (ret < 0) + return ret; + + if (!(resp.enabled & PD_CTRL_RESP_ENABLED_CONNECTED)) + return -ENOTCONN; + + *polarity = resp.polarity; + + return resp.role; +} + +/** + * cros_ec_pd_get_num_ports() - Get number of EC charge ports. + * @info: pointer to struct cros_ec_extcon_info + * + * Return: number of ports on success, <0 on failure. + */ +static int cros_ec_pd_get_num_ports(struct cros_ec_extcon_info *info) +{ + struct ec_response_usb_pd_ports resp; + int ret; + + ret = cros_ec_pd_command(info, EC_CMD_USB_PD_PORTS, + 0, NULL, 0, &resp, sizeof(resp)); + if (ret < 0) + return ret; + + return resp.num_ports; +} + +static const char *cros_ec_usb_role_string(unsigned int role) +{ + return role == DR_NONE ? "DISCONNECTED" : + (role == DR_HOST ? "DFP" : "UFP"); +} + +static const char *cros_ec_usb_power_type_string(unsigned int type) +{ + switch (type) { + case USB_CHG_TYPE_NONE: + return "USB_CHG_TYPE_NONE"; + case USB_CHG_TYPE_PD: + return "USB_CHG_TYPE_PD"; + case USB_CHG_TYPE_PROPRIETARY: + return "USB_CHG_TYPE_PROPRIETARY"; + case USB_CHG_TYPE_C: + return "USB_CHG_TYPE_C"; + case USB_CHG_TYPE_BC12_DCP: + return "USB_CHG_TYPE_BC12_DCP"; + case USB_CHG_TYPE_BC12_CDP: + return "USB_CHG_TYPE_BC12_CDP"; + case USB_CHG_TYPE_BC12_SDP: + return "USB_CHG_TYPE_BC12_SDP"; + case USB_CHG_TYPE_OTHER: + return "USB_CHG_TYPE_OTHER"; + case USB_CHG_TYPE_VBUS: + return "USB_CHG_TYPE_VBUS"; + case USB_CHG_TYPE_UNKNOWN: + return "USB_CHG_TYPE_UNKNOWN"; + default: + return "USB_CHG_TYPE_UNKNOWN"; + } +} + +static bool cros_ec_usb_power_type_is_wall_wart(unsigned int type, + unsigned int role) +{ + switch (type) { + /* FIXME : Guppy, Donnettes, and other chargers will be miscategorized + * because they identify with USB_CHG_TYPE_C, but we can't return true + * here from that code because that breaks Suzy-Q and other kinds of + * USB Type-C cables and peripherals. + */ + case USB_CHG_TYPE_PROPRIETARY: + case USB_CHG_TYPE_BC12_DCP: + return true; + case USB_CHG_TYPE_PD: + case USB_CHG_TYPE_C: + case USB_CHG_TYPE_BC12_CDP: + case USB_CHG_TYPE_BC12_SDP: + case USB_CHG_TYPE_OTHER: + case USB_CHG_TYPE_VBUS: + case USB_CHG_TYPE_UNKNOWN: + case USB_CHG_TYPE_NONE: + default: + return false; + } +} + +static int extcon_cros_ec_detect_cable(struct cros_ec_extcon_info *info, + bool force) +{ + struct device *dev = info->dev; + int role, power_type; + unsigned int dr = DR_NONE; + bool pr = false; + bool polarity = false; + bool dp = false; + bool mux = false; + bool hpd = false; + + power_type = cros_ec_usb_get_power_type(info); + if (power_type < 0) { + dev_err(dev, "failed getting power type err = %d\n", + power_type); + return power_type; + } + + role = cros_ec_usb_get_role(info, &polarity); + if (role < 0) { + if (role != -ENOTCONN) { + dev_err(dev, "failed getting role err = %d\n", role); + return role; + } + dev_dbg(dev, "disconnected\n"); + } else { + int pd_mux_state; + + dr = (role & PD_CTRL_RESP_ROLE_DATA) ? DR_HOST : DR_DEVICE; + pr = (role & PD_CTRL_RESP_ROLE_POWER); + pd_mux_state = cros_ec_usb_get_pd_mux_state(info); + if (pd_mux_state < 0) + pd_mux_state = USB_PD_MUX_USB_ENABLED; + + dp = pd_mux_state & USB_PD_MUX_DP_ENABLED; + mux = pd_mux_state & USB_PD_MUX_USB_ENABLED; + hpd = pd_mux_state & USB_PD_MUX_HPD_IRQ; + + dev_dbg(dev, + "connected role 0x%x pwr type %d dr %d pr %d pol %d mux %d dp %d hpd %d\n", + role, power_type, dr, pr, polarity, mux, dp, hpd); + } + + /* + * When there is no USB host (e.g. USB PD charger), + * we are not really a UFP for the AP. + */ + if (dr == DR_DEVICE && + cros_ec_usb_power_type_is_wall_wart(power_type, role)) + dr = DR_NONE; + + if (force || info->dr != dr || info->pr != pr || info->dp != dp || + info->mux != mux || info->power_type != power_type) { + bool host_connected = false, device_connected = false; + + dev_dbg(dev, "Type/Role switch! type = %s role = %s\n", + cros_ec_usb_power_type_string(power_type), + cros_ec_usb_role_string(dr)); + info->dr = dr; + info->pr = pr; + info->dp = dp; + info->mux = mux; + info->power_type = power_type; + + if (dr == DR_DEVICE) + device_connected = true; + else if (dr == DR_HOST) + host_connected = true; + + extcon_set_state(info->edev, EXTCON_USB, device_connected); + extcon_set_state(info->edev, EXTCON_USB_HOST, host_connected); + extcon_set_state(info->edev, EXTCON_DISP_DP, dp); + extcon_set_property(info->edev, EXTCON_USB, + EXTCON_PROP_USB_VBUS, + (union extcon_property_value)(int)pr); + extcon_set_property(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_VBUS, + (union extcon_property_value)(int)pr); + extcon_set_property(info->edev, EXTCON_USB, + EXTCON_PROP_USB_TYPEC_POLARITY, + (union extcon_property_value)(int)polarity); + extcon_set_property(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_TYPEC_POLARITY, + (union extcon_property_value)(int)polarity); + extcon_set_property(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_USB_TYPEC_POLARITY, + (union extcon_property_value)(int)polarity); + extcon_set_property(info->edev, EXTCON_USB, + EXTCON_PROP_USB_SS, + (union extcon_property_value)(int)mux); + extcon_set_property(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_SS, + (union extcon_property_value)(int)mux); + extcon_set_property(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_USB_SS, + (union extcon_property_value)(int)mux); + extcon_set_property(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_DISP_HPD, + (union extcon_property_value)(int)hpd); + + extcon_sync(info->edev, EXTCON_USB); + extcon_sync(info->edev, EXTCON_USB_HOST); + extcon_sync(info->edev, EXTCON_DISP_DP); + + } else if (hpd) { + extcon_set_property(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_DISP_HPD, + (union extcon_property_value)(int)hpd); + extcon_sync(info->edev, EXTCON_DISP_DP); + } + + return 0; +} + +static int extcon_cros_ec_event(struct notifier_block *nb, + unsigned long queued_during_suspend, + void *_notify) +{ + struct cros_ec_extcon_info *info; + struct cros_ec_device *ec; + u32 host_event; + + info = container_of(nb, struct cros_ec_extcon_info, notifier); + ec = info->ec; + + host_event = cros_ec_get_host_event(ec); + if (host_event & (EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU) | + EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX))) { + extcon_cros_ec_detect_cable(info, false); + return NOTIFY_OK; + } + + return NOTIFY_DONE; +} + +static int extcon_cros_ec_probe(struct platform_device *pdev) +{ + struct cros_ec_extcon_info *info; + struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + int numports, ret; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = dev; + info->ec = ec; + + if (np) { + u32 port; + + ret = of_property_read_u32(np, "google,usb-port-id", &port); + if (ret < 0) { + dev_err(dev, "Missing google,usb-port-id property\n"); + return ret; + } + info->port_id = port; + } else { + info->port_id = pdev->id; + } + + numports = cros_ec_pd_get_num_ports(info); + if (numports < 0) { + dev_err(dev, "failed getting number of ports! ret = %d\n", + numports); + return numports; + } + + if (info->port_id >= numports) { + dev_err(dev, "This system only supports %d ports\n", numports); + return -ENODEV; + } + + info->edev = devm_extcon_dev_allocate(dev, usb_type_c_cable); + if (IS_ERR(info->edev)) { + dev_err(dev, "failed to allocate extcon device\n"); + return -ENOMEM; + } + + ret = devm_extcon_dev_register(dev, info->edev); + if (ret < 0) { + dev_err(dev, "failed to register extcon device\n"); + return ret; + } + + extcon_set_property_capability(info->edev, EXTCON_USB, + EXTCON_PROP_USB_VBUS); + extcon_set_property_capability(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_VBUS); + extcon_set_property_capability(info->edev, EXTCON_USB, + EXTCON_PROP_USB_TYPEC_POLARITY); + extcon_set_property_capability(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_TYPEC_POLARITY); + extcon_set_property_capability(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_USB_TYPEC_POLARITY); + extcon_set_property_capability(info->edev, EXTCON_USB, + EXTCON_PROP_USB_SS); + extcon_set_property_capability(info->edev, EXTCON_USB_HOST, + EXTCON_PROP_USB_SS); + extcon_set_property_capability(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_USB_SS); + extcon_set_property_capability(info->edev, EXTCON_DISP_DP, + EXTCON_PROP_DISP_HPD); + + info->dr = DR_NONE; + info->pr = false; + + platform_set_drvdata(pdev, info); + + /* Get PD events from the EC */ + info->notifier.notifier_call = extcon_cros_ec_event; + ret = blocking_notifier_chain_register(&info->ec->event_notifier, + &info->notifier); + if (ret < 0) { + dev_err(dev, "failed to register notifier\n"); + return ret; + } + + /* Perform initial detection */ + ret = extcon_cros_ec_detect_cable(info, true); + if (ret < 0) { + dev_err(dev, "failed to detect initial cable state\n"); + goto unregister_notifier; + } + + return 0; + +unregister_notifier: + blocking_notifier_chain_unregister(&info->ec->event_notifier, + &info->notifier); + return ret; +} + +static int extcon_cros_ec_remove(struct platform_device *pdev) +{ + struct cros_ec_extcon_info *info = platform_get_drvdata(pdev); + + blocking_notifier_chain_unregister(&info->ec->event_notifier, + &info->notifier); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int extcon_cros_ec_suspend(struct device *dev) +{ + return 0; +} + +static int extcon_cros_ec_resume(struct device *dev) +{ + int ret; + struct cros_ec_extcon_info *info = dev_get_drvdata(dev); + + ret = extcon_cros_ec_detect_cable(info, true); + if (ret < 0) + dev_err(dev, "failed to detect cable state on resume\n"); + + return 0; +} + +static const struct dev_pm_ops extcon_cros_ec_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(extcon_cros_ec_suspend, extcon_cros_ec_resume) +}; + +#define DEV_PM_OPS (&extcon_cros_ec_dev_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_OF +static const struct of_device_id extcon_cros_ec_of_match[] = { + { .compatible = "google,extcon-usbc-cros-ec" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, extcon_cros_ec_of_match); +#endif /* CONFIG_OF */ + +static struct platform_driver extcon_cros_ec_driver = { + .driver = { + .name = "extcon-usbc-cros-ec", + .of_match_table = of_match_ptr(extcon_cros_ec_of_match), + .pm = DEV_PM_OPS, + }, + .remove = extcon_cros_ec_remove, + .probe = extcon_cros_ec_probe, +}; + +module_platform_driver(extcon_cros_ec_driver); + +MODULE_DESCRIPTION("ChromeOS Embedded Controller extcon driver"); +MODULE_AUTHOR("Benson Leung <bleung@chromium.org>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c new file mode 100644 index 000000000..4c70136c7 --- /dev/null +++ b/drivers/extcon/extcon.c @@ -0,0 +1,1446 @@ +/* + * drivers/extcon/extcon.c - External Connector (extcon) framework. + * + * Copyright (C) 2015 Samsung Electronics + * Author: Chanwoo Choi <cw00.choi@samsung.com> + * + * Copyright (C) 2012 Samsung Electronics + * Author: Donggeun Kim <dg77.kim@samsung.com> + * Author: MyungJoo Ham <myungjoo.ham@samsung.com> + * + * based on android/drivers/switch/switch_class.c + * Copyright (C) 2008 Google, Inc. + * Author: Mike Lockwood <lockwood@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/sysfs.h> + +#include "extcon.h" + +#define SUPPORTED_CABLE_MAX 32 + +static const struct __extcon_info { + unsigned int type; + unsigned int id; + const char *name; + +} extcon_info[] = { + [EXTCON_NONE] = { + .type = EXTCON_TYPE_MISC, + .id = EXTCON_NONE, + .name = "NONE", + }, + + /* USB external connector */ + [EXTCON_USB] = { + .type = EXTCON_TYPE_USB, + .id = EXTCON_USB, + .name = "USB", + }, + [EXTCON_USB_HOST] = { + .type = EXTCON_TYPE_USB, + .id = EXTCON_USB_HOST, + .name = "USB-HOST", + }, + + /* Charging external connector */ + [EXTCON_CHG_USB_SDP] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_SDP, + .name = "SDP", + }, + [EXTCON_CHG_USB_DCP] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_DCP, + .name = "DCP", + }, + [EXTCON_CHG_USB_CDP] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_CDP, + .name = "CDP", + }, + [EXTCON_CHG_USB_ACA] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_ACA, + .name = "ACA", + }, + [EXTCON_CHG_USB_FAST] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_FAST, + .name = "FAST-CHARGER", + }, + [EXTCON_CHG_USB_SLOW] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_SLOW, + .name = "SLOW-CHARGER", + }, + [EXTCON_CHG_WPT] = { + .type = EXTCON_TYPE_CHG, + .id = EXTCON_CHG_WPT, + .name = "WPT", + }, + [EXTCON_CHG_USB_PD] = { + .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, + .id = EXTCON_CHG_USB_PD, + .name = "PD", + }, + + /* Jack external connector */ + [EXTCON_JACK_MICROPHONE] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_MICROPHONE, + .name = "MICROPHONE", + }, + [EXTCON_JACK_HEADPHONE] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_HEADPHONE, + .name = "HEADPHONE", + }, + [EXTCON_JACK_LINE_IN] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_LINE_IN, + .name = "LINE-IN", + }, + [EXTCON_JACK_LINE_OUT] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_LINE_OUT, + .name = "LINE-OUT", + }, + [EXTCON_JACK_VIDEO_IN] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_VIDEO_IN, + .name = "VIDEO-IN", + }, + [EXTCON_JACK_VIDEO_OUT] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_VIDEO_OUT, + .name = "VIDEO-OUT", + }, + [EXTCON_JACK_SPDIF_IN] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_SPDIF_IN, + .name = "SPDIF-IN", + }, + [EXTCON_JACK_SPDIF_OUT] = { + .type = EXTCON_TYPE_JACK, + .id = EXTCON_JACK_SPDIF_OUT, + .name = "SPDIF-OUT", + }, + + /* Display external connector */ + [EXTCON_DISP_HDMI] = { + .type = EXTCON_TYPE_DISP, + .id = EXTCON_DISP_HDMI, + .name = "HDMI", + }, + [EXTCON_DISP_MHL] = { + .type = EXTCON_TYPE_DISP, + .id = EXTCON_DISP_MHL, + .name = "MHL", + }, + [EXTCON_DISP_DVI] = { + .type = EXTCON_TYPE_DISP, + .id = EXTCON_DISP_DVI, + .name = "DVI", + }, + [EXTCON_DISP_VGA] = { + .type = EXTCON_TYPE_DISP, + .id = EXTCON_DISP_VGA, + .name = "VGA", + }, + [EXTCON_DISP_DP] = { + .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, + .id = EXTCON_DISP_DP, + .name = "DP", + }, + [EXTCON_DISP_HMD] = { + .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, + .id = EXTCON_DISP_HMD, + .name = "HMD", + }, + + /* Miscellaneous external connector */ + [EXTCON_DOCK] = { + .type = EXTCON_TYPE_MISC, + .id = EXTCON_DOCK, + .name = "DOCK", + }, + [EXTCON_JIG] = { + .type = EXTCON_TYPE_MISC, + .id = EXTCON_JIG, + .name = "JIG", + }, + [EXTCON_MECHANICAL] = { + .type = EXTCON_TYPE_MISC, + .id = EXTCON_MECHANICAL, + .name = "MECHANICAL", + }, + + { /* sentinel */ } +}; + +/** + * struct extcon_cable - An internal data for an external connector. + * @edev: the extcon device + * @cable_index: the index of this cable in the edev + * @attr_g: the attribute group for the cable + * @attr_name: "name" sysfs entry + * @attr_state: "state" sysfs entry + * @attrs: the array pointing to attr_name and attr_state for attr_g + */ +struct extcon_cable { + struct extcon_dev *edev; + int cable_index; + + struct attribute_group attr_g; + struct device_attribute attr_name; + struct device_attribute attr_state; + + struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ + + union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; + union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; + union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; + union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; + + unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; + unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; + unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; + unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; +}; + +static struct class *extcon_class; + +static LIST_HEAD(extcon_dev_list); +static DEFINE_MUTEX(extcon_dev_list_lock); + +static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) +{ + int i = 0; + + if (!edev->mutually_exclusive) + return 0; + + for (i = 0; edev->mutually_exclusive[i]; i++) { + int weight; + u32 correspondants = new_state & edev->mutually_exclusive[i]; + + /* calculate the total number of bits set */ + weight = hweight32(correspondants); + if (weight > 1) + return i + 1; + } + + return 0; +} + +static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) +{ + int i; + + /* Find the the index of extcon cable in edev->supported_cable */ + for (i = 0; i < edev->max_supported; i++) { + if (edev->supported_cable[i] == id) + return i; + } + + return -EINVAL; +} + +static int get_extcon_type(unsigned int prop) +{ + switch (prop) { + case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: + return EXTCON_TYPE_USB; + case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: + return EXTCON_TYPE_CHG; + case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: + return EXTCON_TYPE_JACK; + case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: + return EXTCON_TYPE_DISP; + default: + return -EINVAL; + } +} + +static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) +{ + return !!(edev->state & BIT(index)); +} + +static bool is_extcon_changed(struct extcon_dev *edev, int index, + bool new_state) +{ + int state = !!(edev->state & BIT(index)); + return (state != new_state); +} + +static bool is_extcon_property_supported(unsigned int id, unsigned int prop) +{ + int type; + + /* Check whether the property is supported or not. */ + type = get_extcon_type(prop); + if (type < 0) + return false; + + /* Check whether a specific extcon id supports the property or not. */ + return !!(extcon_info[id].type & type); +} + +static int is_extcon_property_capability(struct extcon_dev *edev, + unsigned int id, int index,unsigned int prop) +{ + struct extcon_cable *cable; + int type, ret; + + /* Check whether the property is supported or not. */ + type = get_extcon_type(prop); + if (type < 0) + return type; + + cable = &edev->cables[index]; + + switch (type) { + case EXTCON_TYPE_USB: + ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); + break; + case EXTCON_TYPE_CHG: + ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); + break; + case EXTCON_TYPE_JACK: + ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); + break; + case EXTCON_TYPE_DISP: + ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static void init_property(struct extcon_dev *edev, unsigned int id, int index) +{ + unsigned int type = extcon_info[id].type; + struct extcon_cable *cable = &edev->cables[index]; + + if (EXTCON_TYPE_USB & type) + memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); + if (EXTCON_TYPE_CHG & type) + memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); + if (EXTCON_TYPE_JACK & type) + memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); + if (EXTCON_TYPE_DISP & type) + memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); +} + +static ssize_t state_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int i, count = 0; + struct extcon_dev *edev = dev_get_drvdata(dev); + + if (edev->max_supported == 0) + return sprintf(buf, "%u\n", edev->state); + + for (i = 0; i < edev->max_supported; i++) { + count += sprintf(buf + count, "%s=%d\n", + extcon_info[edev->supported_cable[i]].name, + !!(edev->state & BIT(i))); + } + + return count; +} +static DEVICE_ATTR_RO(state); + +static ssize_t name_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct extcon_dev *edev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", edev->name); +} +static DEVICE_ATTR_RO(name); + +static ssize_t cable_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct extcon_cable *cable = container_of(attr, struct extcon_cable, + attr_name); + int i = cable->cable_index; + + return sprintf(buf, "%s\n", + extcon_info[cable->edev->supported_cable[i]].name); +} + +static ssize_t cable_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct extcon_cable *cable = container_of(attr, struct extcon_cable, + attr_state); + + int i = cable->cable_index; + + return sprintf(buf, "%d\n", + extcon_get_state(cable->edev, cable->edev->supported_cable[i])); +} + +/** + * extcon_sync() - Synchronize the state for an external connector. + * @edev: the extcon device + * + * Note that this function send a notification in order to synchronize + * the state and property of an external connector. + * + * Returns 0 if success or error number if fail. + */ +int extcon_sync(struct extcon_dev *edev, unsigned int id) +{ + char name_buf[120]; + char state_buf[120]; + char *prop_buf; + char *envp[3]; + int env_offset = 0; + int length; + int index; + int state; + unsigned long flags; + + if (!edev) + return -EINVAL; + + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + spin_lock_irqsave(&edev->lock, flags); + state = !!(edev->state & BIT(index)); + spin_unlock_irqrestore(&edev->lock, flags); + + /* + * Call functions in a raw notifier chain for the specific one + * external connector. + */ + raw_notifier_call_chain(&edev->nh[index], state, edev); + + /* + * Call functions in a raw notifier chain for the all supported + * external connectors. + */ + raw_notifier_call_chain(&edev->nh_all, state, edev); + + spin_lock_irqsave(&edev->lock, flags); + /* This could be in interrupt handler */ + prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); + if (!prop_buf) { + /* Unlock early before uevent */ + spin_unlock_irqrestore(&edev->lock, flags); + + dev_err(&edev->dev, "out of memory in extcon_set_state\n"); + kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); + + return -ENOMEM; + } + + length = name_show(&edev->dev, NULL, prop_buf); + if (length > 0) { + if (prop_buf[length - 1] == '\n') + prop_buf[length - 1] = 0; + snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); + envp[env_offset++] = name_buf; + } + + length = state_show(&edev->dev, NULL, prop_buf); + if (length > 0) { + if (prop_buf[length - 1] == '\n') + prop_buf[length - 1] = 0; + snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); + envp[env_offset++] = state_buf; + } + envp[env_offset] = NULL; + + /* Unlock early before uevent */ + spin_unlock_irqrestore(&edev->lock, flags); + kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); + free_page((unsigned long)prop_buf); + + return 0; +} +EXPORT_SYMBOL_GPL(extcon_sync); + +/** + * extcon_get_state() - Get the state of an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * + * Returns 0 if success or error number if fail. + */ +int extcon_get_state(struct extcon_dev *edev, const unsigned int id) +{ + int index, state; + unsigned long flags; + + if (!edev) + return -EINVAL; + + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + spin_lock_irqsave(&edev->lock, flags); + state = is_extcon_attached(edev, index); + spin_unlock_irqrestore(&edev->lock, flags); + + return state; +} +EXPORT_SYMBOL_GPL(extcon_get_state); + +/** + * extcon_set_state() - Set the state of an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @state: the new state of an external connector. + * the default semantics is true: attached / false: detached. + * + * Note that this function set the state of an external connector without + * a notification. To synchronize the state of an external connector, + * have to use extcon_set_state_sync() and extcon_sync(). + * + * Returns 0 if success or error number if fail. + */ +int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state) +{ + unsigned long flags; + int index, ret = 0; + + if (!edev) + return -EINVAL; + + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + spin_lock_irqsave(&edev->lock, flags); + + /* Check whether the external connector's state is changed. */ + if (!is_extcon_changed(edev, index, state)) + goto out; + + if (check_mutually_exclusive(edev, + (edev->state & ~BIT(index)) | (state & BIT(index)))) { + ret = -EPERM; + goto out; + } + + /* + * Initialize the value of extcon property before setting + * the detached state for an external connector. + */ + if (!state) + init_property(edev, id, index); + + /* Update the state for an external connector. */ + if (state) + edev->state |= BIT(index); + else + edev->state &= ~(BIT(index)); +out: + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_set_state); + +/** + * extcon_set_state_sync() - Set the state of an external connector with sync. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @state: the new state of external connector. + * the default semantics is true: attached / false: detached. + * + * Note that this function set the state of external connector + * and synchronize the state by sending a notification. + * + * Returns 0 if success or error number if fail. + */ +int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state) +{ + int ret, index; + unsigned long flags; + + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + /* Check whether the external connector's state is changed. */ + spin_lock_irqsave(&edev->lock, flags); + ret = is_extcon_changed(edev, index, state); + spin_unlock_irqrestore(&edev->lock, flags); + if (!ret) + return 0; + + ret = extcon_set_state(edev, id, state); + if (ret < 0) + return ret; + + return extcon_sync(edev, id); +} +EXPORT_SYMBOL_GPL(extcon_set_state_sync); + +/** + * extcon_get_property() - Get the property value of an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @prop: the property id indicating an extcon property + * @prop_val: the pointer which store the value of extcon property + * + * Note that when getting the property value of external connector, + * the external connector should be attached. If detached state, function + * return 0 without property value. Also, the each property should be + * included in the list of supported properties according to extcon type. + * + * Returns 0 if success or error number if fail. + */ +int extcon_get_property(struct extcon_dev *edev, unsigned int id, + unsigned int prop, + union extcon_property_value *prop_val) +{ + struct extcon_cable *cable; + unsigned long flags; + int index, ret = 0; + + *prop_val = (union extcon_property_value)(0); + + if (!edev) + return -EINVAL; + + /* Check whether the property is supported or not */ + if (!is_extcon_property_supported(id, prop)) + return -EINVAL; + + /* Find the cable index of external connector by using id */ + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + spin_lock_irqsave(&edev->lock, flags); + + /* Check whether the property is available or not. */ + if (!is_extcon_property_capability(edev, id, index, prop)) { + spin_unlock_irqrestore(&edev->lock, flags); + return -EPERM; + } + + /* + * Check whether the external connector is attached. + * If external connector is detached, the user can not + * get the property value. + */ + if (!is_extcon_attached(edev, index)) { + spin_unlock_irqrestore(&edev->lock, flags); + return 0; + } + + cable = &edev->cables[index]; + + /* Get the property value according to extcon type */ + switch (prop) { + case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: + *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; + break; + case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: + *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; + break; + case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: + *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; + break; + case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: + *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; + break; + default: + ret = -EINVAL; + break; + } + + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_get_property); + +/** + * extcon_set_property() - Set the property value of an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @prop: the property id indicating an extcon property + * @prop_val: the pointer including the new value of extcon property + * + * Note that each property should be included in the list of supported + * properties according to the extcon type. + * + * Returns 0 if success or error number if fail. + */ +int extcon_set_property(struct extcon_dev *edev, unsigned int id, + unsigned int prop, + union extcon_property_value prop_val) +{ + struct extcon_cable *cable; + unsigned long flags; + int index, ret = 0; + + if (!edev) + return -EINVAL; + + /* Check whether the property is supported or not */ + if (!is_extcon_property_supported(id, prop)) + return -EINVAL; + + /* Find the cable index of external connector by using id */ + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + spin_lock_irqsave(&edev->lock, flags); + + /* Check whether the property is available or not. */ + if (!is_extcon_property_capability(edev, id, index, prop)) { + spin_unlock_irqrestore(&edev->lock, flags); + return -EPERM; + } + + cable = &edev->cables[index]; + + /* Set the property value according to extcon type */ + switch (prop) { + case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: + cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; + break; + case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: + cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; + break; + case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: + cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; + break; + case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: + cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; + break; + default: + ret = -EINVAL; + break; + } + + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_set_property); + +/** + * extcon_set_property_sync() - Set property of an external connector with sync. + * @prop_val: the pointer including the new value of extcon property + * + * Note that when setting the property value of external connector, + * the external connector should be attached. The each property should + * be included in the list of supported properties according to extcon type. + * + * Returns 0 if success or error number if fail. + */ +int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, + unsigned int prop, + union extcon_property_value prop_val) +{ + int ret; + + ret = extcon_set_property(edev, id, prop, prop_val); + if (ret < 0) + return ret; + + return extcon_sync(edev, id); +} +EXPORT_SYMBOL_GPL(extcon_set_property_sync); + +/** + * extcon_get_property_capability() - Get the capability of the property + * for an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @prop: the property id indicating an extcon property + * + * Returns 1 if the property is available or 0 if not available. + */ +int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, + unsigned int prop) +{ + int index; + + if (!edev) + return -EINVAL; + + /* Check whether the property is supported or not */ + if (!is_extcon_property_supported(id, prop)) + return -EINVAL; + + /* Find the cable index of external connector by using id */ + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + return is_extcon_property_capability(edev, id, index, prop); +} +EXPORT_SYMBOL_GPL(extcon_get_property_capability); + +/** + * extcon_set_property_capability() - Set the capability of the property + * for an external connector. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @prop: the property id indicating an extcon property + * + * Note that this function set the capability of the property + * for an external connector in order to mark the bit in capability + * bitmap which mean the available state of the property. + * + * Returns 0 if success or error number if fail. + */ +int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, + unsigned int prop) +{ + struct extcon_cable *cable; + int index, type, ret = 0; + + if (!edev) + return -EINVAL; + + /* Check whether the property is supported or not. */ + if (!is_extcon_property_supported(id, prop)) + return -EINVAL; + + /* Find the cable index of external connector by using id. */ + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + type = get_extcon_type(prop); + if (type < 0) + return type; + + cable = &edev->cables[index]; + + switch (type) { + case EXTCON_TYPE_USB: + __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); + break; + case EXTCON_TYPE_CHG: + __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); + break; + case EXTCON_TYPE_JACK: + __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); + break; + case EXTCON_TYPE_DISP: + __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); + break; + default: + ret = -EINVAL; + } + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_set_property_capability); + +/** + * extcon_get_extcon_dev() - Get the extcon device instance from the name. + * @extcon_name: the extcon name provided with extcon_dev_register() + * + * Return the pointer of extcon device if success or ERR_PTR(err) if fail. + */ +struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) +{ + struct extcon_dev *sd; + + if (!extcon_name) + return ERR_PTR(-EINVAL); + + mutex_lock(&extcon_dev_list_lock); + list_for_each_entry(sd, &extcon_dev_list, entry) { + if (!strcmp(sd->name, extcon_name)) + goto out; + } + sd = NULL; +out: + mutex_unlock(&extcon_dev_list_lock); + return sd; +} +EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); + +/** + * extcon_register_notifier() - Register a notifier block to get notified by + * any state changes from the extcon. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @nb: a notifier block to be registered + * + * Note that the second parameter given to the callback of nb (val) is + * the current state of an external connector and the third pameter + * is the pointer of extcon device. + * + * Returns 0 if success or error number if fail. + */ +int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb) +{ + unsigned long flags; + int ret, idx = -EINVAL; + + if (!edev || !nb) + return -EINVAL; + + idx = find_cable_index_by_id(edev, id); + if (idx < 0) + return idx; + + spin_lock_irqsave(&edev->lock, flags); + ret = raw_notifier_chain_register(&edev->nh[idx], nb); + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_register_notifier); + +/** + * extcon_unregister_notifier() - Unregister a notifier block from the extcon. + * @edev: the extcon device + * @id: the unique id indicating an external connector + * @nb: a notifier block to be registered + * + * Returns 0 if success or error number if fail. + */ +int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb) +{ + unsigned long flags; + int ret, idx; + + if (!edev || !nb) + return -EINVAL; + + idx = find_cable_index_by_id(edev, id); + if (idx < 0) + return idx; + + spin_lock_irqsave(&edev->lock, flags); + ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_unregister_notifier); + +/** + * extcon_register_notifier_all() - Register a notifier block for all connectors. + * @edev: the extcon device + * @nb: a notifier block to be registered + * + * Note that this function registers a notifier block in order to receive + * the state change of all supported external connectors from extcon device. + * And the second parameter given to the callback of nb (val) is + * the current state and the third pameter is the pointer of extcon device. + * + * Returns 0 if success or error number if fail. + */ +int extcon_register_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) +{ + unsigned long flags; + int ret; + + if (!edev || !nb) + return -EINVAL; + + spin_lock_irqsave(&edev->lock, flags); + ret = raw_notifier_chain_register(&edev->nh_all, nb); + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_register_notifier_all); + +/** + * extcon_unregister_notifier_all() - Unregister a notifier block from extcon. + * @edev: the extcon device + * @nb: a notifier block to be registered + * + * Returns 0 if success or error number if fail. + */ +int extcon_unregister_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) +{ + unsigned long flags; + int ret; + + if (!edev || !nb) + return -EINVAL; + + spin_lock_irqsave(&edev->lock, flags); + ret = raw_notifier_chain_unregister(&edev->nh_all, nb); + spin_unlock_irqrestore(&edev->lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all); + +static struct attribute *extcon_attrs[] = { + &dev_attr_state.attr, + &dev_attr_name.attr, + NULL, +}; +ATTRIBUTE_GROUPS(extcon); + +static int create_extcon_class(void) +{ + if (!extcon_class) { + extcon_class = class_create(THIS_MODULE, "extcon"); + if (IS_ERR(extcon_class)) + return PTR_ERR(extcon_class); + extcon_class->dev_groups = extcon_groups; + } + + return 0; +} + +static void extcon_dev_release(struct device *dev) +{ +} + +static const char *muex_name = "mutually_exclusive"; +static void dummy_sysfs_dev_release(struct device *dev) +{ +} + +/* + * extcon_dev_allocate() - Allocate the memory of extcon device. + * @supported_cable: the array of the supported external connectors + * ending with EXTCON_NONE. + * + * Note that this function allocates the memory for extcon device + * and initialize default setting for the extcon device. + * + * Returns the pointer memory of allocated extcon_dev if success + * or ERR_PTR(err) if fail. + */ +struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) +{ + struct extcon_dev *edev; + + if (!supported_cable) + return ERR_PTR(-EINVAL); + + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return ERR_PTR(-ENOMEM); + + edev->max_supported = 0; + edev->supported_cable = supported_cable; + + return edev; +} + +/* + * extcon_dev_free() - Free the memory of extcon device. + * @edev: the extcon device + */ +void extcon_dev_free(struct extcon_dev *edev) +{ + kfree(edev); +} +EXPORT_SYMBOL_GPL(extcon_dev_free); + +/** + * extcon_dev_register() - Register an new extcon device + * @edev: the extcon device to be registered + * + * Among the members of edev struct, please set the "user initializing data" + * do not set the values of "internal data", which are initialized by + * this function. + * + * Note that before calling this funciton, have to allocate the memory + * of an extcon device by using the extcon_dev_allocate(). And the extcon + * dev should include the supported_cable information. + * + * Returns 0 if success or error number if fail. + */ +int extcon_dev_register(struct extcon_dev *edev) +{ + int ret, index = 0; + static atomic_t edev_no = ATOMIC_INIT(-1); + + if (!extcon_class) { + ret = create_extcon_class(); + if (ret < 0) + return ret; + } + + if (!edev || !edev->supported_cable) + return -EINVAL; + + for (; edev->supported_cable[index] != EXTCON_NONE; index++); + + edev->max_supported = index; + if (index > SUPPORTED_CABLE_MAX) { + dev_err(&edev->dev, + "exceed the maximum number of supported cables\n"); + return -EINVAL; + } + + edev->dev.class = extcon_class; + edev->dev.release = extcon_dev_release; + + edev->name = dev_name(edev->dev.parent); + if (IS_ERR_OR_NULL(edev->name)) { + dev_err(&edev->dev, + "extcon device name is null\n"); + return -EINVAL; + } + dev_set_name(&edev->dev, "extcon%lu", + (unsigned long)atomic_inc_return(&edev_no)); + + if (edev->max_supported) { + char buf[10]; + char *str; + struct extcon_cable *cable; + + edev->cables = kcalloc(edev->max_supported, + sizeof(struct extcon_cable), + GFP_KERNEL); + if (!edev->cables) { + ret = -ENOMEM; + goto err_sysfs_alloc; + } + for (index = 0; index < edev->max_supported; index++) { + cable = &edev->cables[index]; + + snprintf(buf, 10, "cable.%d", index); + str = kzalloc(strlen(buf) + 1, + GFP_KERNEL); + if (!str) { + for (index--; index >= 0; index--) { + cable = &edev->cables[index]; + kfree(cable->attr_g.name); + } + ret = -ENOMEM; + + goto err_alloc_cables; + } + strcpy(str, buf); + + cable->edev = edev; + cable->cable_index = index; + cable->attrs[0] = &cable->attr_name.attr; + cable->attrs[1] = &cable->attr_state.attr; + cable->attrs[2] = NULL; + cable->attr_g.name = str; + cable->attr_g.attrs = cable->attrs; + + sysfs_attr_init(&cable->attr_name.attr); + cable->attr_name.attr.name = "name"; + cable->attr_name.attr.mode = 0444; + cable->attr_name.show = cable_name_show; + + sysfs_attr_init(&cable->attr_state.attr); + cable->attr_state.attr.name = "state"; + cable->attr_state.attr.mode = 0444; + cable->attr_state.show = cable_state_show; + } + } + + if (edev->max_supported && edev->mutually_exclusive) { + char buf[80]; + char *name; + + /* Count the size of mutually_exclusive array */ + for (index = 0; edev->mutually_exclusive[index]; index++) + ; + + edev->attrs_muex = kcalloc(index + 1, + sizeof(struct attribute *), + GFP_KERNEL); + if (!edev->attrs_muex) { + ret = -ENOMEM; + goto err_muex; + } + + edev->d_attrs_muex = kcalloc(index, + sizeof(struct device_attribute), + GFP_KERNEL); + if (!edev->d_attrs_muex) { + ret = -ENOMEM; + kfree(edev->attrs_muex); + goto err_muex; + } + + for (index = 0; edev->mutually_exclusive[index]; index++) { + sprintf(buf, "0x%x", edev->mutually_exclusive[index]); + name = kzalloc(strlen(buf) + 1, + GFP_KERNEL); + if (!name) { + for (index--; index >= 0; index--) { + kfree(edev->d_attrs_muex[index].attr. + name); + } + kfree(edev->d_attrs_muex); + kfree(edev->attrs_muex); + ret = -ENOMEM; + goto err_muex; + } + strcpy(name, buf); + sysfs_attr_init(&edev->d_attrs_muex[index].attr); + edev->d_attrs_muex[index].attr.name = name; + edev->d_attrs_muex[index].attr.mode = 0000; + edev->attrs_muex[index] = &edev->d_attrs_muex[index] + .attr; + } + edev->attr_g_muex.name = muex_name; + edev->attr_g_muex.attrs = edev->attrs_muex; + + } + + if (edev->max_supported) { + edev->extcon_dev_type.groups = + kcalloc(edev->max_supported + 2, + sizeof(struct attribute_group *), + GFP_KERNEL); + if (!edev->extcon_dev_type.groups) { + ret = -ENOMEM; + goto err_alloc_groups; + } + + edev->extcon_dev_type.name = dev_name(&edev->dev); + edev->extcon_dev_type.release = dummy_sysfs_dev_release; + + for (index = 0; index < edev->max_supported; index++) + edev->extcon_dev_type.groups[index] = + &edev->cables[index].attr_g; + if (edev->mutually_exclusive) + edev->extcon_dev_type.groups[index] = + &edev->attr_g_muex; + + edev->dev.type = &edev->extcon_dev_type; + } + + spin_lock_init(&edev->lock); + if (edev->max_supported) { + edev->nh = kcalloc(edev->max_supported, sizeof(*edev->nh), + GFP_KERNEL); + if (!edev->nh) { + ret = -ENOMEM; + goto err_alloc_nh; + } + } + + for (index = 0; index < edev->max_supported; index++) + RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); + + RAW_INIT_NOTIFIER_HEAD(&edev->nh_all); + + dev_set_drvdata(&edev->dev, edev); + edev->state = 0; + + ret = device_register(&edev->dev); + if (ret) { + put_device(&edev->dev); + goto err_dev; + } + + mutex_lock(&extcon_dev_list_lock); + list_add(&edev->entry, &extcon_dev_list); + mutex_unlock(&extcon_dev_list_lock); + + return 0; + +err_dev: + if (edev->max_supported) + kfree(edev->nh); +err_alloc_nh: + if (edev->max_supported) + kfree(edev->extcon_dev_type.groups); +err_alloc_groups: + if (edev->max_supported && edev->mutually_exclusive) { + for (index = 0; edev->mutually_exclusive[index]; index++) + kfree(edev->d_attrs_muex[index].attr.name); + kfree(edev->d_attrs_muex); + kfree(edev->attrs_muex); + } +err_muex: + for (index = 0; index < edev->max_supported; index++) + kfree(edev->cables[index].attr_g.name); +err_alloc_cables: + if (edev->max_supported) + kfree(edev->cables); +err_sysfs_alloc: + return ret; +} +EXPORT_SYMBOL_GPL(extcon_dev_register); + +/** + * extcon_dev_unregister() - Unregister the extcon device. + * @edev: the extcon device to be unregistered. + * + * Note that this does not call kfree(edev) because edev was not allocated + * by this class. + */ +void extcon_dev_unregister(struct extcon_dev *edev) +{ + int index; + + if (!edev) + return; + + mutex_lock(&extcon_dev_list_lock); + list_del(&edev->entry); + mutex_unlock(&extcon_dev_list_lock); + + if (IS_ERR_OR_NULL(get_device(&edev->dev))) { + dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", + dev_name(&edev->dev)); + return; + } + + device_unregister(&edev->dev); + + if (edev->mutually_exclusive && edev->max_supported) { + for (index = 0; edev->mutually_exclusive[index]; + index++) + kfree(edev->d_attrs_muex[index].attr.name); + kfree(edev->d_attrs_muex); + kfree(edev->attrs_muex); + } + + for (index = 0; index < edev->max_supported; index++) + kfree(edev->cables[index].attr_g.name); + + if (edev->max_supported) { + kfree(edev->extcon_dev_type.groups); + kfree(edev->cables); + kfree(edev->nh); + } + + put_device(&edev->dev); +} +EXPORT_SYMBOL_GPL(extcon_dev_unregister); + +#ifdef CONFIG_OF + +/* + * extcon_find_edev_by_node - Find the extcon device from devicetree. + * @node : OF node identifying edev + * + * Return the pointer of extcon device if success or ERR_PTR(err) if fail. + */ +struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) +{ + struct extcon_dev *edev; + + mutex_lock(&extcon_dev_list_lock); + list_for_each_entry(edev, &extcon_dev_list, entry) + if (edev->dev.parent && edev->dev.parent->of_node == node) + goto out; + edev = ERR_PTR(-EPROBE_DEFER); +out: + mutex_unlock(&extcon_dev_list_lock); + + return edev; +} + +/* + * extcon_get_edev_by_phandle - Get the extcon device from devicetree. + * @dev : the instance to the given device + * @index : the index into list of extcon_dev + * + * Return the pointer of extcon device if success or ERR_PTR(err) if fail. + */ +struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) +{ + struct device_node *node; + struct extcon_dev *edev; + + if (!dev) + return ERR_PTR(-EINVAL); + + if (!dev->of_node) { + dev_dbg(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + node = of_parse_phandle(dev->of_node, "extcon", index); + if (!node) { + dev_dbg(dev, "failed to get phandle in %pOF node\n", + dev->of_node); + return ERR_PTR(-ENODEV); + } + + edev = extcon_find_edev_by_node(node); + of_node_put(node); + + return edev; +} + +#else + +struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) +{ + return ERR_PTR(-ENOSYS); +} + +struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) +{ + return ERR_PTR(-ENOSYS); +} + +#endif /* CONFIG_OF */ + +EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); +EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); + +/** + * extcon_get_edev_name() - Get the name of the extcon device. + * @edev: the extcon device + */ +const char *extcon_get_edev_name(struct extcon_dev *edev) +{ + return !edev ? NULL : edev->name; +} + +static int __init extcon_class_init(void) +{ + return create_extcon_class(); +} +module_init(extcon_class_init); + +static void __exit extcon_class_exit(void) +{ + class_destroy(extcon_class); +} +module_exit(extcon_class_exit); + +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); +MODULE_DESCRIPTION("External Connector (extcon) framework"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h new file mode 100644 index 000000000..93b5e0306 --- /dev/null +++ b/drivers/extcon/extcon.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_EXTCON_INTERNAL_H__ +#define __LINUX_EXTCON_INTERNAL_H__ + +#include <linux/extcon-provider.h> + +/** + * struct extcon_dev - An extcon device represents one external connector. + * @name: The name of this extcon device. Parent device name is + * used if NULL. + * @supported_cable: Array of supported cable names ending with EXTCON_NONE. + * If supported_cable is NULL, cable name related APIs + * are disabled. + * @mutually_exclusive: Array of mutually exclusive set of cables that cannot + * be attached simultaneously. The array should be + * ending with NULL or be NULL (no mutually exclusive + * cables). For example, if it is { 0x7, 0x30, 0}, then, + * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot + * be attached simulataneously. {0x7, 0} is equivalent to + * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there + * can be no simultaneous connections. + * @dev: Device of this extcon. + * @state: Attach/detach state of this extcon. Do not provide at + * register-time. + * @nh_all: Notifier for the state change events for all supported + * external connectors from this extcon. + * @nh: Notifier for the state change events from this extcon + * @entry: To support list of extcon devices so that users can + * search for extcon devices based on the extcon name. + * @lock: + * @max_supported: Internal value to store the number of cables. + * @extcon_dev_type: Device_type struct to provide attribute_groups + * customized for each extcon device. + * @cables: Sysfs subdirectories. Each represents one cable. + * + * In most cases, users only need to provide "User initializing data" of + * this struct when registering an extcon. In some exceptional cases, + * optional callbacks may be needed. However, the values in "internal data" + * are overwritten by register function. + */ +struct extcon_dev { + /* Optional user initializing data */ + const char *name; + const unsigned int *supported_cable; + const u32 *mutually_exclusive; + + /* Internal data. Please do not set. */ + struct device dev; + struct raw_notifier_head nh_all; + struct raw_notifier_head *nh; + struct list_head entry; + int max_supported; + spinlock_t lock; /* could be called by irq handler */ + u32 state; + + /* /sys/class/extcon/.../cable.n/... */ + struct device_type extcon_dev_type; + struct extcon_cable *cables; + + /* /sys/class/extcon/.../mutually_exclusive/... */ + struct attribute_group attr_g_muex; + struct attribute **attrs_muex; + struct device_attribute *d_attrs_muex; +}; + +#endif /* __LINUX_EXTCON_INTERNAL_H__ */ |