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Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c new file mode 100644 index 000000000..527938eee --- /dev/null +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -0,0 +1,448 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * dwc3-pci.c - PCI Specific glue layer + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/pci.h> +#include <linux/workqueue.h> +#include <linux/pm_runtime.h> +#include <linux/platform_device.h> +#include <linux/gpio/consumer.h> +#include <linux/gpio/machine.h> +#include <linux/acpi.h> +#include <linux/delay.h> + +#define PCI_DEVICE_ID_INTEL_BYT 0x0f37 +#define PCI_DEVICE_ID_INTEL_MRFLD 0x119e +#define PCI_DEVICE_ID_INTEL_BSW 0x22b7 +#define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 +#define PCI_DEVICE_ID_INTEL_SPTH 0xa130 +#define PCI_DEVICE_ID_INTEL_BXT 0x0aaa +#define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa +#define PCI_DEVICE_ID_INTEL_APL 0x5aaa +#define PCI_DEVICE_ID_INTEL_KBP 0xa2b0 +#define PCI_DEVICE_ID_INTEL_CMLLP 0x02ee +#define PCI_DEVICE_ID_INTEL_CMLH 0x06ee +#define PCI_DEVICE_ID_INTEL_GLK 0x31aa +#define PCI_DEVICE_ID_INTEL_CNPLP 0x9dee +#define PCI_DEVICE_ID_INTEL_CNPH 0xa36e +#define PCI_DEVICE_ID_INTEL_CNPV 0xa3b0 +#define PCI_DEVICE_ID_INTEL_ICLLP 0x34ee + +#define PCI_INTEL_BXT_DSM_GUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511" +#define PCI_INTEL_BXT_FUNC_PMU_PWR 4 +#define PCI_INTEL_BXT_STATE_D0 0 +#define PCI_INTEL_BXT_STATE_D3 3 + +#define GP_RWBAR 1 +#define GP_RWREG1 0xa0 +#define GP_RWREG1_ULPI_REFCLK_DISABLE (1 << 17) + +/** + * struct dwc3_pci - Driver private structure + * @dwc3: child dwc3 platform_device + * @pci: our link to PCI bus + * @guid: _DSM GUID + * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM + * @wakeup_work: work for asynchronous resume + */ +struct dwc3_pci { + struct platform_device *dwc3; + struct pci_dev *pci; + + guid_t guid; + + unsigned int has_dsm_for_pm:1; + struct work_struct wakeup_work; +}; + +static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; +static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; + +static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { + { "reset-gpios", &reset_gpios, 1 }, + { "cs-gpios", &cs_gpios, 1 }, + { }, +}; + +static struct gpiod_lookup_table platform_bytcr_gpios = { + .dev_id = "0000:00:16.0", + .table = { + GPIO_LOOKUP("INT33FC:00", 54, "cs", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT33FC:02", 14, "reset", GPIO_ACTIVE_HIGH), + {} + }, +}; + +static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci) +{ + void __iomem *reg; + u32 value; + + reg = pcim_iomap(pci, GP_RWBAR, 0); + if (!reg) + return -ENOMEM; + + value = readl(reg + GP_RWREG1); + if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE)) + goto unmap; /* ULPI refclk already enabled */ + + value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE; + writel(value, reg + GP_RWREG1); + /* This comes from the Intel Android x86 tree w/o any explanation */ + msleep(100); +unmap: + pcim_iounmap(pci, reg); + return 0; +} + +static const struct property_entry dwc3_pci_intel_properties[] = { + PROPERTY_ENTRY_STRING("dr_mode", "peripheral"), + PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), + {} +}; + +static const struct property_entry dwc3_pci_mrfld_properties[] = { + PROPERTY_ENTRY_STRING("dr_mode", "otg"), + PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"), + PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), + {} +}; + +static const struct property_entry dwc3_pci_amd_properties[] = { + PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), + PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf), + PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"), + PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"), + PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"), + PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"), + PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"), + PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"), + PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"), + PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"), + PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1), + /* FIXME these quirks should be removed when AMD NL tapes out */ + PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"), + PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"), + PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"), + PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"), + PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), + {} +}; + +static int dwc3_pci_quirks(struct dwc3_pci *dwc) +{ + struct pci_dev *pdev = dwc->pci; + + if (pdev->vendor == PCI_VENDOR_ID_INTEL) { + if (pdev->device == PCI_DEVICE_ID_INTEL_BXT || + pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) { + guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid); + dwc->has_dsm_for_pm = true; + } + + if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { + struct gpio_desc *gpio; + int ret; + + /* On BYT the FW does not always enable the refclock */ + ret = dwc3_byt_enable_ulpi_refclock(pdev); + if (ret) + return ret; + + ret = devm_acpi_dev_add_driver_gpios(&pdev->dev, + acpi_dwc3_byt_gpios); + if (ret) + dev_dbg(&pdev->dev, "failed to add mapping table\n"); + + /* + * A lot of BYT devices lack ACPI resource entries for + * the GPIOs, add a fallback mapping to the reference + * design GPIOs which all boards seem to use. + */ + gpiod_add_lookup_table(&platform_bytcr_gpios); + + /* + * These GPIOs will turn on the USB2 PHY. Note that we have to + * put the gpio descriptors again here because the phy driver + * might want to grab them, too. + */ + gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + + gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + if (gpio) { + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + usleep_range(10000, 11000); + } + } + } + + return 0; +} + +#ifdef CONFIG_PM +static void dwc3_pci_resume_work(struct work_struct *work) +{ + struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work); + struct platform_device *dwc3 = dwc->dwc3; + int ret; + + ret = pm_runtime_get_sync(&dwc3->dev); + if (ret < 0) { + pm_runtime_put_sync_autosuspend(&dwc3->dev); + return; + } + + pm_runtime_mark_last_busy(&dwc3->dev); + pm_runtime_put_sync_autosuspend(&dwc3->dev); +} +#endif + +static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) +{ + struct property_entry *p = (struct property_entry *)id->driver_data; + struct dwc3_pci *dwc; + struct resource res[2]; + int ret; + struct device *dev = &pci->dev; + + ret = pcim_enable_device(pci); + if (ret) { + dev_err(dev, "failed to enable pci device\n"); + return -ENODEV; + } + + pci_set_master(pci); + + dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); + if (!dwc) + return -ENOMEM; + + dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); + if (!dwc->dwc3) + return -ENOMEM; + + memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); + + res[0].start = pci_resource_start(pci, 0); + res[0].end = pci_resource_end(pci, 0); + res[0].name = "dwc_usb3"; + res[0].flags = IORESOURCE_MEM; + + res[1].start = pci->irq; + res[1].name = "dwc_usb3"; + res[1].flags = IORESOURCE_IRQ; + + ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res)); + if (ret) { + dev_err(dev, "couldn't add resources to dwc3 device\n"); + goto err; + } + + dwc->pci = pci; + dwc->dwc3->dev.parent = dev; + ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev)); + + ret = platform_device_add_properties(dwc->dwc3, p); + if (ret < 0) + goto err; + + ret = dwc3_pci_quirks(dwc); + if (ret) + goto err; + + ret = platform_device_add(dwc->dwc3); + if (ret) { + dev_err(dev, "failed to register dwc3 device\n"); + goto err; + } + + device_init_wakeup(dev, true); + pci_set_drvdata(pci, dwc); + pm_runtime_put(dev); +#ifdef CONFIG_PM + INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work); +#endif + + return 0; +err: + platform_device_put(dwc->dwc3); + return ret; +} + +static void dwc3_pci_remove(struct pci_dev *pci) +{ + struct dwc3_pci *dwc = pci_get_drvdata(pci); + struct pci_dev *pdev = dwc->pci; + + if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) + gpiod_remove_lookup_table(&platform_bytcr_gpios); +#ifdef CONFIG_PM + cancel_work_sync(&dwc->wakeup_work); +#endif + device_init_wakeup(&pci->dev, false); + pm_runtime_get(&pci->dev); + platform_device_unregister(dwc->dwc3); +} + +static const struct pci_device_id dwc3_pci_id_table[] = { + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BSW), + (kernel_ulong_t) &dwc3_pci_intel_properties }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BYT), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MRFLD), + (kernel_ulong_t) &dwc3_pci_mrfld_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLLP), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLH), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTLP), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTH), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT_M), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_APL), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_KBP), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_GLK), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPLP), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPH), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPV), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICLLP), + (kernel_ulong_t) &dwc3_pci_intel_properties, }, + + { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB), + (kernel_ulong_t) &dwc3_pci_amd_properties, }, + { } /* Terminating Entry */ +}; +MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); + +#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP) +static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param) +{ + union acpi_object *obj; + union acpi_object tmp; + union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp); + + if (!dwc->has_dsm_for_pm) + return 0; + + tmp.type = ACPI_TYPE_INTEGER; + tmp.integer.value = param; + + obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid, + 1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4); + if (!obj) { + dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n"); + return -EIO; + } + + ACPI_FREE(obj); + + return 0; +} +#endif /* CONFIG_PM || CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM +static int dwc3_pci_runtime_suspend(struct device *dev) +{ + struct dwc3_pci *dwc = dev_get_drvdata(dev); + + if (device_can_wakeup(dev)) + return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3); + + return -EBUSY; +} + +static int dwc3_pci_runtime_resume(struct device *dev) +{ + struct dwc3_pci *dwc = dev_get_drvdata(dev); + int ret; + + ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); + if (ret) + return ret; + + queue_work(pm_wq, &dwc->wakeup_work); + + return 0; +} +#endif /* CONFIG_PM */ + +#ifdef CONFIG_PM_SLEEP +static int dwc3_pci_suspend(struct device *dev) +{ + struct dwc3_pci *dwc = dev_get_drvdata(dev); + + return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3); +} + +static int dwc3_pci_resume(struct device *dev) +{ + struct dwc3_pci *dwc = dev_get_drvdata(dev); + + return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops dwc3_pci_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume) + SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume, + NULL) +}; + +static struct pci_driver dwc3_pci_driver = { + .name = "dwc3-pci", + .id_table = dwc3_pci_id_table, + .probe = dwc3_pci_probe, + .remove = dwc3_pci_remove, + .driver = { + .pm = &dwc3_pci_dev_pm_ops, + } +}; + +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); + +module_pci_driver(dwc3_pci_driver); |