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
  41static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  42static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  43
  44static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  45        { "reset-gpios", &reset_gpios, 1 },
  46        { "cs-gpios", &cs_gpios, 1 },
  47        { },
  48};
  49
  50static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3)
  51{
  52        if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  53            pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  54                struct dwc3_platform_data pdata;
  55
  56                memset(&pdata, 0, sizeof(pdata));
  57
  58                pdata.has_lpm_erratum = true;
  59                pdata.lpm_nyet_threshold = 0xf;
  60
  61                pdata.u2exit_lfps_quirk = true;
  62                pdata.u2ss_inp3_quirk = true;
  63                pdata.req_p1p2p3_quirk = true;
  64                pdata.del_p1p2p3_quirk = true;
  65                pdata.del_phy_power_chg_quirk = true;
  66                pdata.lfps_filter_quirk = true;
  67                pdata.rx_detect_poll_quirk = true;
  68
  69                pdata.tx_de_emphasis_quirk = true;
  70                pdata.tx_de_emphasis = 1;
  71
  72                /*
  73                 * FIXME these quirks should be removed when AMD NL
  74                 * taps out
  75                 */
  76                pdata.disable_scramble_quirk = true;
  77                pdata.dis_u3_susphy_quirk = true;
  78                pdata.dis_u2_susphy_quirk = true;
  79
  80                return platform_device_add_data(dwc3, &pdata, sizeof(pdata));
  81        }
  82
  83        if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
  84            pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  85                struct gpio_desc *gpio;
  86
  87                acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  88                                          acpi_dwc3_byt_gpios);
  89
  90                /*
  91                 * These GPIOs will turn on the USB2 PHY. Note that we have to
  92                 * put the gpio descriptors again here because the phy driver
  93                 * might want to grab them, too.
  94                 */
  95                gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
  96                if (IS_ERR(gpio))
  97                        return PTR_ERR(gpio);
  98
  99                gpiod_set_value_cansleep(gpio, 1);
 100                gpiod_put(gpio);
 101
 102                gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 103                if (IS_ERR(gpio))
 104                        return PTR_ERR(gpio);
 105
 106                if (gpio) {
 107                        gpiod_set_value_cansleep(gpio, 1);
 108                        gpiod_put(gpio);
 109                        usleep_range(10000, 11000);
 110                }
 111        }
 112
 113        if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 114            (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 115             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 116             pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 117
 118                struct dwc3_platform_data pdata;
 119
 120                memset(&pdata, 0, sizeof(pdata));
 121                pdata.usb3_lpm_capable = true;
 122                pdata.has_lpm_erratum = true;
 123                pdata.dis_enblslpm_quirk = true;
 124
 125                return platform_device_add_data(dwc3, &pdata, sizeof(pdata));
 126        }
 127
 128        return 0;
 129}
 130
 131static int dwc3_pci_probe(struct pci_dev *pci,
 132                const struct pci_device_id *id)
 133{
 134        struct resource         res[2];
 135        struct platform_device  *dwc3;
 136        int                     ret;
 137        struct device           *dev = &pci->dev;
 138
 139        ret = pcim_enable_device(pci);
 140        if (ret) {
 141                dev_err(dev, "failed to enable pci device\n");
 142                return -ENODEV;
 143        }
 144
 145        pci_set_master(pci);
 146
 147        dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 148        if (!dwc3) {
 149                dev_err(dev, "couldn't allocate dwc3 device\n");
 150                return -ENOMEM;
 151        }
 152
 153        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 154
 155        res[0].start    = pci_resource_start(pci, 0);
 156        res[0].end      = pci_resource_end(pci, 0);
 157        res[0].name     = "dwc_usb3";
 158        res[0].flags    = IORESOURCE_MEM;
 159
 160        res[1].start    = pci->irq;
 161        res[1].name     = "dwc_usb3";
 162        res[1].flags    = IORESOURCE_IRQ;
 163
 164        ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 165        if (ret) {
 166                dev_err(dev, "couldn't add resources to dwc3 device\n");
 167                return ret;
 168        }
 169
 170        dwc3->dev.parent = dev;
 171        ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 172
 173        ret = dwc3_pci_quirks(pci, dwc3);
 174        if (ret)
 175                goto err;
 176
 177        ret = platform_device_add(dwc3);
 178        if (ret) {
 179                dev_err(dev, "failed to register dwc3 device\n");
 180                goto err;
 181        }
 182
 183        pci_set_drvdata(pci, dwc3);
 184        return 0;
 185err:
 186        platform_device_put(dwc3);
 187        return ret;
 188}
 189
 190static void dwc3_pci_remove(struct pci_dev *pci)
 191{
 192        acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 193        platform_device_unregister(pci_get_drvdata(pci));
 194}
 195
 196static const struct pci_device_id dwc3_pci_id_table[] = {
 197        {
 198                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 199                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 200        },
 201        {
 202                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 203                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 204        },
 205        {
 206                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 207                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 208        },
 209        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 210        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 211        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 212        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 213        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 214        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 215        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 216        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 217        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 218        {  }    /* Terminating Entry */
 219};
 220MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 221
 222static struct pci_driver dwc3_pci_driver = {
 223        .name           = "dwc3-pci",
 224        .id_table       = dwc3_pci_id_table,
 225        .probe          = dwc3_pci_probe,
 226        .remove         = dwc3_pci_remove,
 227};
 228
 229MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 230MODULE_LICENSE("GPL v2");
 231MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 232
 233module_pci_driver(dwc3_pci_driver);
 234
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