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
  38 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  39 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  40
  41 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  42         { "reset-gpios", &reset_gpios, 1 },
  43         { "cs-gpios", &cs_gpios, 1 },
  44         { },
  45 };
  46
  47 static int dwc3_pci_quirks(struct pci_dev *pdev)
  48 {
  49         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  50             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  51                 struct dwc3_platform_data pdata;
  52
  53                 memset(&pdata, 0, sizeof(pdata));
  54
  55                 pdata.has_lpm_erratum = true;
  56                 pdata.lpm_nyet_threshold = 0xf;
  57
  58                 pdata.u2exit_lfps_quirk = true;
  59                 pdata.u2ss_inp3_quirk = true;
  60                 pdata.req_p1p2p3_quirk = true;
  61                 pdata.del_p1p2p3_quirk = true;
  62                 pdata.del_phy_power_chg_quirk = true;
  63                 pdata.lfps_filter_quirk = true;
  64                 pdata.rx_detect_poll_quirk = true;
  65
  66                 pdata.tx_de_emphasis_quirk = true;
  67                 pdata.tx_de_emphasis = 1;
  68
  69                 /*
  70                  * FIXME these quirks should be removed when AMD NL
  71                  * taps out
  72                  */
  73                 pdata.disable_scramble_quirk = true;
  74                 pdata.dis_u3_susphy_quirk = true;
  75                 pdata.dis_u2_susphy_quirk = true;
  76
  77                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
  78                                                 sizeof(pdata));
  79         }
  80
  81         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
  82             pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  83                 struct gpio_desc *gpio;
  84
  85                 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  86                                           acpi_dwc3_byt_gpios);
  87
  88                 /*
  89                  * These GPIOs will turn on the USB2 PHY. Note that we have to
  90                  * put the gpio descriptors again here because the phy driver
  91                  * might want to grab them, too.
  92                  */
  93                 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
  94                 if (IS_ERR(gpio))
  95                         return PTR_ERR(gpio);
  96
  97                 gpiod_set_value_cansleep(gpio, 1);
  98                 gpiod_put(gpio);
  99
 100                 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 101                 if (IS_ERR(gpio))
 102                         return PTR_ERR(gpio);
 103
 104                 if (gpio) {
 105                         gpiod_set_value_cansleep(gpio, 1);
 106                         gpiod_put(gpio);
 107                         usleep_range(10000, 11000);
 108                 }
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int dwc3_pci_probe(struct pci_dev *pci,
 115                 const struct pci_device_id *id)
 116 {
 117         struct resource         res[2];
 118         struct platform_device  *dwc3;
 119         int                     ret;
 120         struct device           *dev = &pci->dev;
 121
 122         ret = pcim_enable_device(pci);
 123         if (ret) {
 124                 dev_err(dev, "failed to enable pci device\n");
 125                 return -ENODEV;
 126         }
 127
 128         pci_set_master(pci);
 129
 130         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 131         if (!dwc3) {
 132                 dev_err(dev, "couldn't allocate dwc3 device\n");
 133                 return -ENOMEM;
 134         }
 135
 136         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 137
 138         res[0].start    = pci_resource_start(pci, 0);
 139         res[0].end      = pci_resource_end(pci, 0);
 140         res[0].name     = "dwc_usb3";
 141         res[0].flags    = IORESOURCE_MEM;
 142
 143         res[1].start    = pci->irq;
 144         res[1].name     = "dwc_usb3";
 145         res[1].flags    = IORESOURCE_IRQ;
 146
 147         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 148         if (ret) {
 149                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 150                 return ret;
 151         }
 152
 153         pci_set_drvdata(pci, dwc3);
 154         ret = dwc3_pci_quirks(pci);
 155         if (ret)
 156                 goto err;
 157
 158         dwc3->dev.parent = dev;
 159         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 160
 161         ret = platform_device_add(dwc3);
 162         if (ret) {
 163                 dev_err(dev, "failed to register dwc3 device\n");
 164                 goto err;
 165         }
 166
 167         return 0;
 168 err:
 169         platform_device_put(dwc3);
 170         return ret;
 171 }
 172
 173 static void dwc3_pci_remove(struct pci_dev *pci)
 174 {
 175         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 176         platform_device_unregister(pci_get_drvdata(pci));
 177 }
 178
 179 static const struct pci_device_id dwc3_pci_id_table[] = {
 180         {
 181                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 182                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 183         },
 184         {
 185                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 186                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 187         },
 188         {
 189                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 190                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 191         },
 192         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 193         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 194         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 195         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 196         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 197         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 198         {  }    /* Terminating Entry */
 199 };
 200 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 201
 202 static struct pci_driver dwc3_pci_driver = {
 203         .name           = "dwc3-pci",
 204         .id_table       = dwc3_pci_id_table,
 205         .probe          = dwc3_pci_probe,
 206         .remove         = dwc3_pci_remove,
 207 };
 208
 209 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 210 MODULE_LICENSE("GPL v2");
 211 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 212
 213 module_pci_driver(dwc3_pci_driver);