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_APL                 0x5aaa
  39
  40 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  41 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  42
  43 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  44         { "reset-gpios", &reset_gpios, 1 },
  45         { "cs-gpios", &cs_gpios, 1 },
  46         { },
  47 };
  48
  49 static int dwc3_pci_quirks(struct pci_dev *pdev)
  50 {
  51         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  52             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  53                 struct dwc3_platform_data pdata;
  54
  55                 memset(&pdata, 0, sizeof(pdata));
  56
  57                 pdata.has_lpm_erratum = true;
  58                 pdata.lpm_nyet_threshold = 0xf;
  59
  60                 pdata.u2exit_lfps_quirk = true;
  61                 pdata.u2ss_inp3_quirk = true;
  62                 pdata.req_p1p2p3_quirk = true;
  63                 pdata.del_p1p2p3_quirk = true;
  64                 pdata.del_phy_power_chg_quirk = true;
  65                 pdata.lfps_filter_quirk = true;
  66                 pdata.rx_detect_poll_quirk = true;
  67
  68                 pdata.tx_de_emphasis_quirk = true;
  69                 pdata.tx_de_emphasis = 1;
  70
  71                 /*
  72                  * FIXME these quirks should be removed when AMD NL
  73                  * taps out
  74                  */
  75                 pdata.disable_scramble_quirk = true;
  76                 pdata.dis_u3_susphy_quirk = true;
  77                 pdata.dis_u2_susphy_quirk = true;
  78
  79                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
  80                                                 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(pci_get_drvdata(pdev), &pdata,
 126                                                 sizeof(pdata));
 127         }
 128
 129         return 0;
 130 }
 131
 132 static 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         pci_set_drvdata(pci, dwc3);
 172         ret = dwc3_pci_quirks(pci);
 173         if (ret)
 174                 goto err;
 175
 176         dwc3->dev.parent = dev;
 177         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 178
 179         ret = platform_device_add(dwc3);
 180         if (ret) {
 181                 dev_err(dev, "failed to register dwc3 device\n");
 182                 goto err;
 183         }
 184
 185         return 0;
 186 err:
 187         platform_device_put(dwc3);
 188         return ret;
 189 }
 190
 191 static 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
 197 static 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_APL), },
 217         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 218         {  }    /* Terminating Entry */
 219 };
 220 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 221
 222 static 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
 229 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 230 MODULE_LICENSE("GPL v2");
 231 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 232
 233 module_pci_driver(dwc3_pci_driver);