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, 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
 131 static 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;
 185 err:
 186         platform_device_put(dwc3);
 187         return ret;
 188 }
 189
 190 static 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
 196 static 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 };
 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);