drivers/usb/dwc3/dwc3-pci.c

   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
  41 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  42 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  43
  44 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  45         { "reset-gpios", &reset_gpios, 1 },
  46         { "cs-gpios", &cs_gpios, 1 },
  47         { },
  48 };
  49
  50 static int dwc3_pci_quirks(struct pci_dev *pdev)
  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(pci_get_drvdata(pdev), &pdata,
  81                                                 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(pci_get_drvdata(pdev), &pdata,
 127                                                 sizeof(pdata));
 128         }
 129
 130         return 0;
 131 }
 132
 133 static int dwc3_pci_probe(struct pci_dev *pci,
 134                 const struct pci_device_id *id)
 135 {
 136         struct resource         res[2];
 137         struct platform_device  *dwc3;
 138         int                     ret;
 139         struct device           *dev = &pci->dev;
 140
 141         ret = pcim_enable_device(pci);
 142         if (ret) {
 143                 dev_err(dev, "failed to enable pci device\n");
 144                 return -ENODEV;
 145         }
 146
 147         pci_set_master(pci);
 148
 149         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 150         if (!dwc3) {
 151                 dev_err(dev, "couldn't allocate dwc3 device\n");
 152                 return -ENOMEM;
 153         }
 154
 155         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 156
 157         res[0].start    = pci_resource_start(pci, 0);
 158         res[0].end      = pci_resource_end(pci, 0);
 159         res[0].name     = "dwc_usb3";
 160         res[0].flags    = IORESOURCE_MEM;
 161
 162         res[1].start    = pci->irq;
 163         res[1].name     = "dwc_usb3";
 164         res[1].flags    = IORESOURCE_IRQ;
 165
 166         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 167         if (ret) {
 168                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 169                 return ret;
 170         }
 171
 172         pci_set_drvdata(pci, dwc3);
 173         ret = dwc3_pci_quirks(pci);
 174         if (ret)
 175                 goto err;
 176
 177         dwc3->dev.parent = dev;
 178         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 179
 180         ret = platform_device_add(dwc3);
 181         if (ret) {
 182                 dev_err(dev, "failed to register dwc3 device\n");
 183                 goto err;
 184         }
 185
 186         return 0;
 187 err:
 188         platform_device_put(dwc3);
 189         return ret;
 190 }
 191
 192 static void dwc3_pci_remove(struct pci_dev *pci)
 193 {
 194         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 195         platform_device_unregister(pci_get_drvdata(pci));
 196 }
 197
 198 static const struct pci_device_id dwc3_pci_id_table[] = {
 199         {
 200                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 201                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 202         },
 203         {
 204                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 205                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 206         },
 207         {
 208                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 209                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 210         },
 211         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 212         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 213         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 214         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 215         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 216         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 217         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 218         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 219         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 220         {  }    /* Terminating Entry */
 221 };
 222 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 223
 224 static 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
 231 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 232 MODULE_LICENSE("GPL v2");
 233 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 234
 235 module_pci_driver(dwc3_pci_driver);