linux/drivers/usb/dwc3/dwc3-pci.c
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   1/**
   2 * dwc3-pci.c - PCI Specific glue layer
   3 *
   4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   5 *
   6 * Authors: Felipe Balbi <balbi@ti.com>,
   7 *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8 *
   9 * This program is free software: you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2  of
  11 * the License as published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 */
  18
  19#include <linux/kernel.h>
  20#include <linux/module.h>
  21#include <linux/slab.h>
  22#include <linux/pci.h>
  23#include <linux/pm_runtime.h>
  24#include <linux/platform_device.h>
  25#include <linux/gpio/consumer.h>
  26#include <linux/acpi.h>
  27#include <linux/delay.h>
  28
  29#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3         0xabcd
  30#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI     0xabce
  31#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31        0xabcf
  32#define PCI_DEVICE_ID_INTEL_BYT                 0x0f37
  33#define PCI_DEVICE_ID_INTEL_MRFLD               0x119e
  34#define PCI_DEVICE_ID_INTEL_BSW                 0x22b7
  35#define PCI_DEVICE_ID_INTEL_SPTLP               0x9d30
  36#define PCI_DEVICE_ID_INTEL_SPTH                0xa130
  37#define PCI_DEVICE_ID_INTEL_BXT                 0x0aaa
  38#define PCI_DEVICE_ID_INTEL_BXT_M               0x1aaa
  39#define PCI_DEVICE_ID_INTEL_APL                 0x5aaa
  40#define PCI_DEVICE_ID_INTEL_KBP                 0xa2b0
  41#define PCI_DEVICE_ID_INTEL_GLK                 0x31aa
  42
  43static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  44static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  45
  46static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  47        { "reset-gpios", &reset_gpios, 1 },
  48        { "cs-gpios", &cs_gpios, 1 },
  49        { },
  50};
  51
  52static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3)
  53{
  54        if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  55            pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  56                struct property_entry properties[] = {
  57                        PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  58                        PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  59                        PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  60                        PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  61                        PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  62                        PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  63                        PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  64                        PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  65                        PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  66                        PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
  67                        PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
  68                        /*
  69                         * FIXME these quirks should be removed when AMD NL
  70                         * tapes out
  71                         */
  72                        PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
  73                        PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
  74                        PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
  75                        { },
  76                };
  77
  78                return platform_device_add_properties(dwc3, properties);
  79        }
  80
  81        if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
  82                int ret;
  83
  84                struct property_entry properties[] = {
  85                        PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
  86                        { }
  87                };
  88
  89                ret = platform_device_add_properties(dwc3, properties);
  90                if (ret < 0)
  91                        return ret;
  92
  93                if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  94                        struct gpio_desc *gpio;
  95
  96                        acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  97                                        acpi_dwc3_byt_gpios);
  98
  99                        /*
 100                         * These GPIOs will turn on the USB2 PHY. Note that we have to
 101                         * put the gpio descriptors again here because the phy driver
 102                         * might want to grab them, too.
 103                         */
 104                        gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 105                        if (IS_ERR(gpio))
 106                                return PTR_ERR(gpio);
 107
 108                        gpiod_set_value_cansleep(gpio, 1);
 109                        gpiod_put(gpio);
 110
 111                        gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 112                        if (IS_ERR(gpio))
 113                                return PTR_ERR(gpio);
 114
 115                        if (gpio) {
 116                                gpiod_set_value_cansleep(gpio, 1);
 117                                gpiod_put(gpio);
 118                                usleep_range(10000, 11000);
 119                        }
 120                }
 121        }
 122
 123        if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 124            (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 125             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 126             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 127                struct property_entry properties[] = {
 128                        PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 129                        PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 130                        PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 131                        { },
 132                };
 133
 134                return platform_device_add_properties(dwc3, properties);
 135        }
 136
 137        return 0;
 138}
 139
 140static int dwc3_pci_probe(struct pci_dev *pci,
 141                const struct pci_device_id *id)
 142{
 143        struct resource         res[2];
 144        struct platform_device  *dwc3;
 145        int                     ret;
 146        struct device           *dev = &pci->dev;
 147
 148        ret = pcim_enable_device(pci);
 149        if (ret) {
 150                dev_err(dev, "failed to enable pci device\n");
 151                return -ENODEV;
 152        }
 153
 154        pci_set_master(pci);
 155
 156        dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 157        if (!dwc3) {
 158                dev_err(dev, "couldn't allocate dwc3 device\n");
 159                return -ENOMEM;
 160        }
 161
 162        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 163
 164        res[0].start    = pci_resource_start(pci, 0);
 165        res[0].end      = pci_resource_end(pci, 0);
 166        res[0].name     = "dwc_usb3";
 167        res[0].flags    = IORESOURCE_MEM;
 168
 169        res[1].start    = pci->irq;
 170        res[1].name     = "dwc_usb3";
 171        res[1].flags    = IORESOURCE_IRQ;
 172
 173        ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 174        if (ret) {
 175                dev_err(dev, "couldn't add resources to dwc3 device\n");
 176                return ret;
 177        }
 178
 179        dwc3->dev.parent = dev;
 180        ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 181
 182        ret = dwc3_pci_quirks(pci, dwc3);
 183        if (ret)
 184                goto err;
 185
 186        ret = platform_device_add(dwc3);
 187        if (ret) {
 188                dev_err(dev, "failed to register dwc3 device\n");
 189                goto err;
 190        }
 191
 192        device_init_wakeup(dev, true);
 193        device_set_run_wake(dev, true);
 194        pci_set_drvdata(pci, dwc3);
 195        pm_runtime_put(dev);
 196
 197        return 0;
 198err:
 199        platform_device_put(dwc3);
 200        return ret;
 201}
 202
 203static void dwc3_pci_remove(struct pci_dev *pci)
 204{
 205        device_init_wakeup(&pci->dev, false);
 206        pm_runtime_get(&pci->dev);
 207        acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 208        platform_device_unregister(pci_get_drvdata(pci));
 209}
 210
 211static const struct pci_device_id dwc3_pci_id_table[] = {
 212        {
 213                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 214                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 215        },
 216        {
 217                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 218                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 219        },
 220        {
 221                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 222                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 223        },
 224        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 225        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 226        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 227        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 228        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 229        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 230        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 231        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 232        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 233        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
 234        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 235        {  }    /* Terminating Entry */
 236};
 237MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 238
 239#ifdef CONFIG_PM
 240static int dwc3_pci_runtime_suspend(struct device *dev)
 241{
 242        if (device_run_wake(dev))
 243                return 0;
 244
 245        return -EBUSY;
 246}
 247
 248static int dwc3_pci_runtime_resume(struct device *dev)
 249{
 250        struct platform_device *dwc3 = dev_get_drvdata(dev);
 251
 252        return pm_runtime_get(&dwc3->dev);
 253}
 254#endif /* CONFIG_PM */
 255
 256#ifdef CONFIG_PM_SLEEP
 257static int dwc3_pci_pm_dummy(struct device *dev)
 258{
 259        /*
 260         * There's nothing to do here. No, seriously. Everything is either taken
 261         * care either by PCI subsystem or dwc3/core.c, so we have nothing
 262         * missing here.
 263         *
 264         * So you'd think we didn't need this at all, but PCI subsystem will
 265         * bail out if we don't have a valid callback :-s
 266         */
 267        return 0;
 268}
 269#endif /* CONFIG_PM_SLEEP */
 270
 271static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 272        SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy)
 273        SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
 274                NULL)
 275};
 276
 277static struct pci_driver dwc3_pci_driver = {
 278        .name           = "dwc3-pci",
 279        .id_table       = dwc3_pci_id_table,
 280        .probe          = dwc3_pci_probe,
 281        .remove         = dwc3_pci_remove,
 282        .driver         = {
 283                .pm     = &dwc3_pci_dev_pm_ops,
 284        }
 285};
 286
 287MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 288MODULE_LICENSE("GPL v2");
 289MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 290
 291module_pci_driver(dwc3_pci_driver);
 292
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