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/platform_device.h>
  24#include <linux/gpio/consumer.h>
  25#include <linux/acpi.h>
  26
  27#include "platform_data.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
  42static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  43static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  44
  45static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  46        { "reset-gpios", &reset_gpios, 1 },
  47        { "cs-gpios", &cs_gpios, 1 },
  48        { },
  49};
  50
  51static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3)
  52{
  53        if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  54            pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  55                struct dwc3_platform_data pdata;
  56
  57                memset(&pdata, 0, sizeof(pdata));
  58
  59                pdata.has_lpm_erratum = true;
  60                pdata.lpm_nyet_threshold = 0xf;
  61
  62                pdata.u2exit_lfps_quirk = true;
  63                pdata.u2ss_inp3_quirk = true;
  64                pdata.req_p1p2p3_quirk = true;
  65                pdata.del_p1p2p3_quirk = true;
  66                pdata.del_phy_power_chg_quirk = true;
  67                pdata.lfps_filter_quirk = true;
  68                pdata.rx_detect_poll_quirk = true;
  69
  70                pdata.tx_de_emphasis_quirk = true;
  71                pdata.tx_de_emphasis = 1;
  72
  73                /*
  74                 * FIXME these quirks should be removed when AMD NL
  75                 * taps out
  76                 */
  77                pdata.disable_scramble_quirk = true;
  78                pdata.dis_u3_susphy_quirk = true;
  79                pdata.dis_u2_susphy_quirk = true;
  80
  81                return platform_device_add_data(dwc3, &pdata, sizeof(pdata));
  82        }
  83
  84        if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
  85            pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  86                struct gpio_desc *gpio;
  87
  88                acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  89                                          acpi_dwc3_byt_gpios);
  90
  91                /*
  92                 * These GPIOs will turn on the USB2 PHY. Note that we have to
  93                 * put the gpio descriptors again here because the phy driver
  94                 * might want to grab them, too.
  95                 */
  96                gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
  97                if (IS_ERR(gpio))
  98                        return PTR_ERR(gpio);
  99
 100                gpiod_set_value_cansleep(gpio, 1);
 101                gpiod_put(gpio);
 102
 103                gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 104                if (IS_ERR(gpio))
 105                        return PTR_ERR(gpio);
 106
 107                if (gpio) {
 108                        gpiod_set_value_cansleep(gpio, 1);
 109                        gpiod_put(gpio);
 110                        usleep_range(10000, 11000);
 111                }
 112        }
 113
 114        if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 115            (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 116             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 117             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 118
 119                struct dwc3_platform_data pdata;
 120
 121                memset(&pdata, 0, sizeof(pdata));
 122                pdata.usb3_lpm_capable = true;
 123                pdata.has_lpm_erratum = true;
 124                pdata.dis_enblslpm_quirk = true;
 125
 126                return platform_device_add_data(dwc3, &pdata, sizeof(pdata));
 127        }
 128
 129        return 0;
 130}
 131
 132static int dwc3_pci_probe(struct pci_dev *pci,
 133                const struct pci_device_id *id)
 134{
 135        struct resource         res[2];
 136        struct platform_device  *dwc3;
 137        int                     ret;
 138        struct device           *dev = &pci->dev;
 139
 140        ret = pcim_enable_device(pci);
 141        if (ret) {
 142                dev_err(dev, "failed to enable pci device\n");
 143                return -ENODEV;
 144        }
 145
 146        pci_set_master(pci);
 147
 148        dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 149        if (!dwc3) {
 150                dev_err(dev, "couldn't allocate dwc3 device\n");
 151                return -ENOMEM;
 152        }
 153
 154        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 155
 156        res[0].start    = pci_resource_start(pci, 0);
 157        res[0].end      = pci_resource_end(pci, 0);
 158        res[0].name     = "dwc_usb3";
 159        res[0].flags    = IORESOURCE_MEM;
 160
 161        res[1].start    = pci->irq;
 162        res[1].name     = "dwc_usb3";
 163        res[1].flags    = IORESOURCE_IRQ;
 164
 165        ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 166        if (ret) {
 167                dev_err(dev, "couldn't add resources to dwc3 device\n");
 168                return ret;
 169        }
 170
 171        dwc3->dev.parent = dev;
 172        ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 173
 174        ret = dwc3_pci_quirks(pci, dwc3);
 175        if (ret)
 176                goto err;
 177
 178        ret = platform_device_add(dwc3);
 179        if (ret) {
 180                dev_err(dev, "failed to register dwc3 device\n");
 181                goto err;
 182        }
 183
 184        pci_set_drvdata(pci, dwc3);
 185        return 0;
 186err:
 187        platform_device_put(dwc3);
 188        return ret;
 189}
 190
 191static void dwc3_pci_remove(struct pci_dev *pci)
 192{
 193        acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 194        platform_device_unregister(pci_get_drvdata(pci));
 195}
 196
 197static const struct pci_device_id dwc3_pci_id_table[] = {
 198        {
 199                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 200                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 201        },
 202        {
 203                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 204                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 205        },
 206        {
 207                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 208                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 209        },
 210        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 211        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 212        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 213        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 214        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 215        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 216        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 217        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 218        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 219        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 220        {  }    /* Terminating Entry */
 221};
 222MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 223
 224static struct pci_driver dwc3_pci_driver = {
 225        .name           = "dwc3-pci",
 226        .id_table       = dwc3_pci_id_table,
 227        .probe          = dwc3_pci_probe,
 228        .remove         = dwc3_pci_remove,
 229};
 230
 231MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 232MODULE_LICENSE("GPL v2");
 233MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 234
 235module_pci_driver(dwc3_pci_driver);
 236
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