From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/mfd/arizona-irq.c | 452 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 452 insertions(+) create mode 100644 drivers/mfd/arizona-irq.c (limited to 'drivers/mfd/arizona-irq.c') diff --git a/drivers/mfd/arizona-irq.c b/drivers/mfd/arizona-irq.c new file mode 100644 index 000000000..d919ae969 --- /dev/null +++ b/drivers/mfd/arizona-irq.c @@ -0,0 +1,452 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Arizona interrupt support + * + * Copyright 2012 Wolfson Microelectronics plc + * + * Author: Mark Brown + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "arizona.h" + +#define ARIZONA_AOD_IRQ_INDEX 0 +#define ARIZONA_MAIN_IRQ_INDEX 1 + +static int arizona_map_irq(struct arizona *arizona, int irq) +{ + int ret; + + if (arizona->aod_irq_chip) { + ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); + if (ret >= 0) + return ret; + } + + return regmap_irq_get_virq(arizona->irq_chip, irq); +} + +int arizona_request_irq(struct arizona *arizona, int irq, char *name, + irq_handler_t handler, void *data) +{ + irq = arizona_map_irq(arizona, irq); + if (irq < 0) + return irq; + + return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, + name, data); +} +EXPORT_SYMBOL_GPL(arizona_request_irq); + +void arizona_free_irq(struct arizona *arizona, int irq, void *data) +{ + irq = arizona_map_irq(arizona, irq); + if (irq < 0) + return; + + free_irq(irq, data); +} +EXPORT_SYMBOL_GPL(arizona_free_irq); + +int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) +{ + irq = arizona_map_irq(arizona, irq); + if (irq < 0) + return irq; + + return irq_set_irq_wake(irq, on); +} +EXPORT_SYMBOL_GPL(arizona_set_irq_wake); + +static irqreturn_t arizona_boot_done(int irq, void *data) +{ + struct arizona *arizona = data; + + dev_dbg(arizona->dev, "Boot done\n"); + + return IRQ_HANDLED; +} + +static irqreturn_t arizona_ctrlif_err(int irq, void *data) +{ + struct arizona *arizona = data; + + /* + * For pretty much all potential sources a register cache sync + * won't help, we've just got a software bug somewhere. + */ + dev_err(arizona->dev, "Control interface error\n"); + + return IRQ_HANDLED; +} + +static irqreturn_t arizona_irq_thread(int irq, void *data) +{ + struct arizona *arizona = data; + bool poll; + unsigned int val; + int ret; + + ret = pm_runtime_resume_and_get(arizona->dev); + if (ret < 0) { + dev_err(arizona->dev, "Failed to resume device: %d\n", ret); + return IRQ_NONE; + } + + do { + poll = false; + + if (arizona->aod_irq_chip) { + /* + * Check the AOD status register to determine whether + * the nested IRQ handler should be called. + */ + ret = regmap_read(arizona->regmap, + ARIZONA_AOD_IRQ1, &val); + if (ret) + dev_warn(arizona->dev, + "Failed to read AOD IRQ1 %d\n", ret); + else if (val) + handle_nested_irq( + irq_find_mapping(arizona->virq, 0)); + } + + /* + * Check if one of the main interrupts is asserted and only + * check that domain if it is. + */ + ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, + &val); + if (ret == 0 && val & ARIZONA_IRQ1_STS) { + handle_nested_irq(irq_find_mapping(arizona->virq, 1)); + } else if (ret != 0) { + dev_err(arizona->dev, + "Failed to read main IRQ status: %d\n", ret); + } + + /* + * Poll the IRQ pin status to see if we're really done + * if the interrupt controller can't do it for us. + */ + if (!arizona->pdata.irq_gpio) { + break; + } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING && + gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { + poll = true; + } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING && + !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { + poll = true; + } + } while (poll); + + pm_runtime_mark_last_busy(arizona->dev); + pm_runtime_put_autosuspend(arizona->dev); + + return IRQ_HANDLED; +} + +static void arizona_irq_enable(struct irq_data *data) +{ +} + +static void arizona_irq_disable(struct irq_data *data) +{ +} + +static int arizona_irq_set_wake(struct irq_data *data, unsigned int on) +{ + struct arizona *arizona = irq_data_get_irq_chip_data(data); + + return irq_set_irq_wake(arizona->irq, on); +} + +static struct irq_chip arizona_irq_chip = { + .name = "arizona", + .irq_disable = arizona_irq_disable, + .irq_enable = arizona_irq_enable, + .irq_set_wake = arizona_irq_set_wake, +}; + +static struct lock_class_key arizona_irq_lock_class; +static struct lock_class_key arizona_irq_request_class; + +static int arizona_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct arizona *data = h->host_data; + + irq_set_chip_data(virq, data); + irq_set_lockdep_class(virq, &arizona_irq_lock_class, + &arizona_irq_request_class); + irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); + irq_set_nested_thread(virq, 1); + irq_set_noprobe(virq); + + return 0; +} + +static const struct irq_domain_ops arizona_domain_ops = { + .map = arizona_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +int arizona_irq_init(struct arizona *arizona) +{ + int flags = IRQF_ONESHOT; + int ret; + const struct regmap_irq_chip *aod, *irq; + struct irq_data *irq_data; + unsigned int virq; + + arizona->ctrlif_error = true; + + switch (arizona->type) { +#ifdef CONFIG_MFD_WM5102 + case WM5102: + aod = &wm5102_aod; + irq = &wm5102_irq; + + arizona->ctrlif_error = false; + break; +#endif +#ifdef CONFIG_MFD_WM5110 + case WM5110: + case WM8280: + aod = &wm5110_aod; + + switch (arizona->rev) { + case 0 ... 2: + irq = &wm5110_irq; + break; + default: + irq = &wm5110_revd_irq; + break; + } + + arizona->ctrlif_error = false; + break; +#endif +#ifdef CONFIG_MFD_CS47L24 + case WM1831: + case CS47L24: + aod = NULL; + irq = &cs47l24_irq; + + arizona->ctrlif_error = false; + break; +#endif +#ifdef CONFIG_MFD_WM8997 + case WM8997: + aod = &wm8997_aod; + irq = &wm8997_irq; + + arizona->ctrlif_error = false; + break; +#endif +#ifdef CONFIG_MFD_WM8998 + case WM8998: + case WM1814: + aod = &wm8998_aod; + irq = &wm8998_irq; + + arizona->ctrlif_error = false; + break; +#endif + default: + BUG_ON("Unknown Arizona class device" == NULL); + return -EINVAL; + } + + /* Disable all wake sources by default */ + regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); + + /* Read the flags from the interrupt controller if not specified */ + if (!arizona->pdata.irq_flags) { + irq_data = irq_get_irq_data(arizona->irq); + if (!irq_data) { + dev_err(arizona->dev, "Invalid IRQ: %d\n", + arizona->irq); + return -EINVAL; + } + + arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); + switch (arizona->pdata.irq_flags) { + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_HIGH: + case IRQF_TRIGGER_RISING: + case IRQF_TRIGGER_FALLING: + break; + + case IRQ_TYPE_NONE: + default: + /* Device default */ + arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; + break; + } + } + + if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | + IRQF_TRIGGER_RISING)) { + ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, + ARIZONA_IRQ_POL, 0); + if (ret != 0) { + dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", + ret); + goto err; + } + } + + flags |= arizona->pdata.irq_flags; + + /* Allocate a virtual IRQ domain to distribute to the regmap domains */ + arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, + arizona); + if (!arizona->virq) { + dev_err(arizona->dev, "Failed to add core IRQ domain\n"); + ret = -EINVAL; + goto err; + } + + if (aod) { + virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); + if (!virq) { + dev_err(arizona->dev, "Failed to map AOD IRQs\n"); + ret = -EINVAL; + goto err_domain; + } + + ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, + 0, aod, &arizona->aod_irq_chip); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to add AOD IRQs: %d\n", ret); + goto err_map_aod; + } + } + + virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); + if (!virq) { + dev_err(arizona->dev, "Failed to map main IRQs\n"); + ret = -EINVAL; + goto err_aod; + } + + ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, + 0, irq, &arizona->irq_chip); + if (ret != 0) { + dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); + goto err_map_main_irq; + } + + /* Used to emulate edge trigger and to work around broken pinmux */ + if (arizona->pdata.irq_gpio) { + if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { + dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", + arizona->irq, arizona->pdata.irq_gpio, + gpio_to_irq(arizona->pdata.irq_gpio)); + arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); + } + + ret = devm_gpio_request_one(arizona->dev, + arizona->pdata.irq_gpio, + GPIOF_IN, "arizona IRQ"); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to request IRQ GPIO %d:: %d\n", + arizona->pdata.irq_gpio, ret); + arizona->pdata.irq_gpio = 0; + } + } + + ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, + flags, "arizona", arizona); + + if (ret != 0) { + dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", + arizona->irq, ret); + goto err_main_irq; + } + + /* Make sure the boot done IRQ is unmasked for resumes */ + ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done", + arizona_boot_done, arizona); + if (ret != 0) { + dev_err(arizona->dev, "Failed to request boot done %d: %d\n", + arizona->irq, ret); + goto err_boot_done; + } + + /* Handle control interface errors in the core */ + if (arizona->ctrlif_error) { + ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, + "Control interface error", + arizona_ctrlif_err, arizona); + if (ret != 0) { + dev_err(arizona->dev, + "Failed to request CTRLIF_ERR %d: %d\n", + arizona->irq, ret); + goto err_ctrlif; + } + } + + return 0; + +err_ctrlif: + arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); +err_boot_done: + free_irq(arizona->irq, arizona); +err_main_irq: + regmap_del_irq_chip(irq_find_mapping(arizona->virq, + ARIZONA_MAIN_IRQ_INDEX), + arizona->irq_chip); +err_map_main_irq: + irq_dispose_mapping(irq_find_mapping(arizona->virq, + ARIZONA_MAIN_IRQ_INDEX)); +err_aod: + regmap_del_irq_chip(irq_find_mapping(arizona->virq, + ARIZONA_AOD_IRQ_INDEX), + arizona->aod_irq_chip); +err_map_aod: + irq_dispose_mapping(irq_find_mapping(arizona->virq, + ARIZONA_AOD_IRQ_INDEX)); +err_domain: + irq_domain_remove(arizona->virq); +err: + return ret; +} + +int arizona_irq_exit(struct arizona *arizona) +{ + unsigned int virq; + + if (arizona->ctrlif_error) + arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona); + arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); + + virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); + regmap_del_irq_chip(virq, arizona->irq_chip); + irq_dispose_mapping(virq); + + virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); + regmap_del_irq_chip(virq, arizona->aod_irq_chip); + irq_dispose_mapping(virq); + + irq_domain_remove(arizona->virq); + + free_irq(arizona->irq, arizona); + + return 0; +} -- cgit v1.2.3