/** * 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> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 of * the License 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/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/pci.h> #include <linux/pm_runtime.h> #include <linux/platform_device.h> #include <linux/gpio/consumer.h> #include <linux/acpi.h> #include <linux/delay.h> #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf #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_GLK 0x31aa #define PCI_INTEL_BXT_DSM_UUID "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 /** * struct dwc3_pci - Driver private structure * @dwc3: child dwc3 platform_device * @pci: our link to PCI bus * @uuid: _DSM UUID * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM */ struct dwc3_pci { struct platform_device *dwc3; struct pci_dev *pci; u8 uuid[16]; unsigned int has_dsm_for_pm:1; }; 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 int dwc3_pci_quirks(struct dwc3_pci *dwc) { struct platform_device *dwc3 = dwc->dwc3; struct pci_dev *pdev = dwc->pci; if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { struct property_entry 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("linux,sysdev_is_parent"), { }, }; return platform_device_add_properties(dwc3, properties); } if (pdev->vendor == PCI_VENDOR_ID_INTEL) { int ret; struct property_entry properties[] = { PROPERTY_ENTRY_STRING("dr_mode", "peripheral"), PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), { } }; ret = platform_device_add_properties(dwc3, properties); if (ret < 0) return ret; if (pdev->device == PCI_DEVICE_ID_INTEL_BXT || pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) { acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid); dwc->has_dsm_for_pm = true; } if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { struct gpio_desc *gpio; acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), acpi_dwc3_byt_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); } } } if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 || pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI || pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) { struct property_entry properties[] = { PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), { }, }; return platform_device_add_properties(dwc3, properties); } return 0; } static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) { 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"); return ret; } dwc->pci = pci; dwc->dwc3->dev.parent = dev; ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev)); 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); device_set_run_wake(dev, true); pci_set_drvdata(pci, dwc); pm_runtime_put(dev); 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); device_init_wakeup(&pci->dev, false); pm_runtime_get(&pci->dev); acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); platform_device_unregister(dwc->dwc3); } static const struct pci_device_id dwc3_pci_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), }, { PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), }, { PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), }, { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, { } /* 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->uuid, 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_run_wake(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); struct platform_device *dwc3 = dwc->dwc3; int ret; ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); if (ret) return ret; return pm_runtime_get(&dwc3->dev); } #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 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);