forked from Minki/linux
696118c016
When building a kernel with CONFIG_PM_SLEEP=n, we
get the following warning:
drivers/usb/dwc3/dwc3-pci.c:253:12: warning: 'dwc3_pci_pm_dummy' defined but not used
In order to fix this, we should only define
dwc3_pci_pm_dummy() when CONFIG_PM_SLEEP is defined.
Fixes: f6c274e11e ("usb: dwc3: pci: runtime_resume child device")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
290 lines
8.0 KiB
C
290 lines
8.0 KiB
C
/**
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* dwc3-pci.c - PCI Specific glue layer
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*
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* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf
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#define PCI_DEVICE_ID_INTEL_BYT 0x0f37
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#define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
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#define PCI_DEVICE_ID_INTEL_BSW 0x22b7
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#define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
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#define PCI_DEVICE_ID_INTEL_SPTH 0xa130
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#define PCI_DEVICE_ID_INTEL_BXT 0x0aaa
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#define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa
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#define PCI_DEVICE_ID_INTEL_APL 0x5aaa
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#define PCI_DEVICE_ID_INTEL_KBP 0xa2b0
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static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
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static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
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static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
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{ "reset-gpios", &reset_gpios, 1 },
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{ "cs-gpios", &cs_gpios, 1 },
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{ },
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};
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static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3)
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{
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if (pdev->vendor == PCI_VENDOR_ID_AMD &&
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pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
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struct property_entry properties[] = {
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PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
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PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
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PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
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PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
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PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
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PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
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PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
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PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
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PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
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PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
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PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
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/*
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* FIXME these quirks should be removed when AMD NL
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* tapes out
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*/
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PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
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PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
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PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
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{ },
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};
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return platform_device_add_properties(dwc3, properties);
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}
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if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
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int ret;
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struct property_entry properties[] = {
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PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
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{ }
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};
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ret = platform_device_add_properties(dwc3, properties);
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if (ret < 0)
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return ret;
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if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
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struct gpio_desc *gpio;
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acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
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acpi_dwc3_byt_gpios);
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/*
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* These GPIOs will turn on the USB2 PHY. Note that we have to
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* put the gpio descriptors again here because the phy driver
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* might want to grab them, too.
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*/
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gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
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if (IS_ERR(gpio))
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return PTR_ERR(gpio);
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gpiod_set_value_cansleep(gpio, 1);
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gpiod_put(gpio);
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gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(gpio))
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return PTR_ERR(gpio);
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if (gpio) {
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gpiod_set_value_cansleep(gpio, 1);
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gpiod_put(gpio);
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usleep_range(10000, 11000);
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}
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}
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}
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if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
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(pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
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pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
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pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
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struct property_entry properties[] = {
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PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
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PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
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PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
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{ },
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};
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return platform_device_add_properties(dwc3, properties);
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}
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return 0;
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}
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static int dwc3_pci_probe(struct pci_dev *pci,
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const struct pci_device_id *id)
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{
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struct resource res[2];
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struct platform_device *dwc3;
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int ret;
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struct device *dev = &pci->dev;
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ret = pcim_enable_device(pci);
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if (ret) {
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dev_err(dev, "failed to enable pci device\n");
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return -ENODEV;
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}
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pci_set_master(pci);
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dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
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if (!dwc3) {
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dev_err(dev, "couldn't allocate dwc3 device\n");
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return -ENOMEM;
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}
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memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
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res[0].start = pci_resource_start(pci, 0);
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res[0].end = pci_resource_end(pci, 0);
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res[0].name = "dwc_usb3";
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res[0].flags = IORESOURCE_MEM;
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res[1].start = pci->irq;
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res[1].name = "dwc_usb3";
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res[1].flags = IORESOURCE_IRQ;
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ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(dev, "couldn't add resources to dwc3 device\n");
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return ret;
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}
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dwc3->dev.parent = dev;
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ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
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ret = dwc3_pci_quirks(pci, dwc3);
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if (ret)
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goto err;
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ret = platform_device_add(dwc3);
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if (ret) {
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dev_err(dev, "failed to register dwc3 device\n");
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goto err;
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}
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device_init_wakeup(dev, true);
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device_set_run_wake(dev, true);
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pci_set_drvdata(pci, dwc3);
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pm_runtime_put(dev);
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return 0;
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err:
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platform_device_put(dwc3);
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return ret;
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}
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static void dwc3_pci_remove(struct pci_dev *pci)
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{
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device_init_wakeup(&pci->dev, false);
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pm_runtime_get(&pci->dev);
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acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
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platform_device_unregister(pci_get_drvdata(pci));
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}
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static const struct pci_device_id dwc3_pci_id_table[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
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},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
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{ } /* Terminating Entry */
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};
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MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
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#ifdef CONFIG_PM
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static int dwc3_pci_runtime_suspend(struct device *dev)
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{
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if (device_run_wake(dev))
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return 0;
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return -EBUSY;
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}
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static int dwc3_pci_runtime_resume(struct device *dev)
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{
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struct platform_device *dwc3 = dev_get_drvdata(dev);
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return pm_runtime_get(&dwc3->dev);
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}
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#endif /* CONFIG_PM */
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#ifdef CONFIG_PM_SLEEP
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static int dwc3_pci_pm_dummy(struct device *dev)
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{
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/*
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* There's nothing to do here. No, seriously. Everything is either taken
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* care either by PCI subsystem or dwc3/core.c, so we have nothing
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* missing here.
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*
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* So you'd think we didn't need this at all, but PCI subsystem will
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* bail out if we don't have a valid callback :-s
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*/
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return 0;
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}
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#endif /* CONFIG_PM_SLEEP */
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static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy)
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SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
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NULL)
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};
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static struct pci_driver dwc3_pci_driver = {
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.name = "dwc3-pci",
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.id_table = dwc3_pci_id_table,
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.probe = dwc3_pci_probe,
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.remove = dwc3_pci_remove,
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.driver = {
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.pm = &dwc3_pci_dev_pm_ops,
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}
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};
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MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
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module_pci_driver(dwc3_pci_driver);
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