514 lines
14 KiB
C
514 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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 - https://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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#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/workqueue.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/gpio/machine.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_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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#define PCI_DEVICE_ID_INTEL_CMLLP 0x02ee
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#define PCI_DEVICE_ID_INTEL_CMLH 0x06ee
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#define PCI_DEVICE_ID_INTEL_GLK 0x31aa
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#define PCI_DEVICE_ID_INTEL_CNPLP 0x9dee
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#define PCI_DEVICE_ID_INTEL_CNPH 0xa36e
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#define PCI_DEVICE_ID_INTEL_CNPV 0xa3b0
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#define PCI_DEVICE_ID_INTEL_ICLLP 0x34ee
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#define PCI_DEVICE_ID_INTEL_EHL 0x4b7e
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#define PCI_DEVICE_ID_INTEL_TGPLP 0xa0ee
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#define PCI_DEVICE_ID_INTEL_TGPH 0x43ee
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#define PCI_DEVICE_ID_INTEL_JSP 0x4dee
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#define PCI_DEVICE_ID_INTEL_ADLP 0x51ee
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#define PCI_DEVICE_ID_INTEL_ADLM 0x54ee
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#define PCI_DEVICE_ID_INTEL_ADLS 0x7ae1
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#define PCI_DEVICE_ID_INTEL_TGL 0x9a15
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#define PCI_DEVICE_ID_AMD_MR 0x163a
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#define PCI_INTEL_BXT_DSM_GUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
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#define PCI_INTEL_BXT_FUNC_PMU_PWR 4
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#define PCI_INTEL_BXT_STATE_D0 0
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#define PCI_INTEL_BXT_STATE_D3 3
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#define GP_RWBAR 1
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#define GP_RWREG1 0xa0
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#define GP_RWREG1_ULPI_REFCLK_DISABLE (1 << 17)
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/**
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* struct dwc3_pci - Driver private structure
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* @dwc3: child dwc3 platform_device
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* @pci: our link to PCI bus
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* @guid: _DSM GUID
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* @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
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* @wakeup_work: work for asynchronous resume
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*/
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struct dwc3_pci {
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struct platform_device *dwc3;
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struct pci_dev *pci;
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guid_t guid;
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unsigned int has_dsm_for_pm:1;
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struct work_struct wakeup_work;
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};
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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 struct gpiod_lookup_table platform_bytcr_gpios = {
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.dev_id = "0000:00:16.0",
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.table = {
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GPIO_LOOKUP("INT33FC:00", 54, "reset", GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP("INT33FC:02", 14, "cs", GPIO_ACTIVE_HIGH),
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{}
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},
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};
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static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
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{
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void __iomem *reg;
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u32 value;
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reg = pcim_iomap(pci, GP_RWBAR, 0);
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if (!reg)
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return -ENOMEM;
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value = readl(reg + GP_RWREG1);
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if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
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goto unmap; /* ULPI refclk already enabled */
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value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
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writel(value, reg + GP_RWREG1);
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/* This comes from the Intel Android x86 tree w/o any explanation */
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msleep(100);
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unmap:
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pcim_iounmap(pci, reg);
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return 0;
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}
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static const struct property_entry dwc3_pci_intel_properties[] = {
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PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
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PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
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{}
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};
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static const struct property_entry dwc3_pci_mrfld_properties[] = {
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PROPERTY_ENTRY_STRING("dr_mode", "otg"),
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PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
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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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PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
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PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
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{}
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};
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static const struct property_entry dwc3_pci_amd_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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/* FIXME these quirks should be removed when AMD NL tapes out */
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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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PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
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{}
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};
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static const struct property_entry dwc3_pci_mr_properties[] = {
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PROPERTY_ENTRY_STRING("dr_mode", "otg"),
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PROPERTY_ENTRY_BOOL("usb-role-switch"),
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PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
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PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
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{}
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};
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static const struct software_node dwc3_pci_intel_swnode = {
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.properties = dwc3_pci_intel_properties,
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};
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static const struct software_node dwc3_pci_intel_mrfld_swnode = {
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.properties = dwc3_pci_mrfld_properties,
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};
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static const struct software_node dwc3_pci_amd_swnode = {
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.properties = dwc3_pci_amd_properties,
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};
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static const struct software_node dwc3_pci_amd_mr_swnode = {
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.properties = dwc3_pci_mr_properties,
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};
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static int dwc3_pci_quirks(struct dwc3_pci *dwc)
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{
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struct pci_dev *pdev = dwc->pci;
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if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
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if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
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pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
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pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
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guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
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dwc->has_dsm_for_pm = true;
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}
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if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
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struct gpio_desc *gpio;
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int ret;
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/* On BYT the FW does not always enable the refclock */
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ret = dwc3_byt_enable_ulpi_refclock(pdev);
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if (ret)
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return ret;
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ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
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acpi_dwc3_byt_gpios);
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if (ret)
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dev_dbg(&pdev->dev, "failed to add mapping table\n");
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/*
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* A lot of BYT devices lack ACPI resource entries for
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* the GPIOs, add a fallback mapping to the reference
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* design GPIOs which all boards seem to use.
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*/
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gpiod_add_lookup_table(&platform_bytcr_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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return 0;
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}
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#ifdef CONFIG_PM
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static void dwc3_pci_resume_work(struct work_struct *work)
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{
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struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
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struct platform_device *dwc3 = dwc->dwc3;
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int ret;
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ret = pm_runtime_get_sync(&dwc3->dev);
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if (ret) {
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pm_runtime_put_sync_autosuspend(&dwc3->dev);
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return;
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}
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pm_runtime_mark_last_busy(&dwc3->dev);
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pm_runtime_put_sync_autosuspend(&dwc3->dev);
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}
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#endif
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static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
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{
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struct dwc3_pci *dwc;
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struct resource res[2];
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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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dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
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if (!dwc)
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return -ENOMEM;
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dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
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if (!dwc->dwc3)
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return -ENOMEM;
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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(dwc->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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goto err;
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}
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dwc->pci = pci;
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dwc->dwc3->dev.parent = dev;
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ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
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ret = device_add_software_node(&dwc->dwc3->dev, (void *)id->driver_data);
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if (ret < 0)
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goto err;
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ret = dwc3_pci_quirks(dwc);
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if (ret)
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goto err;
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ret = platform_device_add(dwc->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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pci_set_drvdata(pci, dwc);
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pm_runtime_put(dev);
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#ifdef CONFIG_PM
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INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
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#endif
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return 0;
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err:
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device_remove_software_node(&dwc->dwc3->dev);
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platform_device_put(dwc->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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struct dwc3_pci *dwc = pci_get_drvdata(pci);
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struct pci_dev *pdev = dwc->pci;
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if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
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gpiod_remove_lookup_table(&platform_bytcr_gpios);
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#ifdef CONFIG_PM
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cancel_work_sync(&dwc->wakeup_work);
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#endif
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device_init_wakeup(&pci->dev, false);
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pm_runtime_get(&pci->dev);
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device_remove_software_node(&dwc->dwc3->dev);
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platform_device_unregister(dwc->dwc3);
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}
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static const struct pci_device_id dwc3_pci_id_table[] = {
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BSW),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BYT),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MRFLD),
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(kernel_ulong_t) &dwc3_pci_intel_mrfld_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLH),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTH),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT_M),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_APL),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_KBP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_GLK),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPH),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPV),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICLLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_EHL),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPH),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_JSP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLP),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLM),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLS),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGL),
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(kernel_ulong_t) &dwc3_pci_intel_swnode, },
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{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB),
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(kernel_ulong_t) &dwc3_pci_amd_swnode, },
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{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_MR),
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(kernel_ulong_t)&dwc3_pci_amd_mr_swnode, },
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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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#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
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static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
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{
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union acpi_object *obj;
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union acpi_object tmp;
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union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
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if (!dwc->has_dsm_for_pm)
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return 0;
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tmp.type = ACPI_TYPE_INTEGER;
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tmp.integer.value = param;
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obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
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1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
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if (!obj) {
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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);
|