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_INTEL_BYT         0x0f37
  31 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
  32 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
  33 #define PCI_DEVICE_ID_INTEL_SPTLP       0x9d30
  34 #define PCI_DEVICE_ID_INTEL_SPTH        0xa130
  35
  36 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  37 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  38
  39 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  40         { "reset-gpios", &reset_gpios, 1 },
  41         { "cs-gpios", &cs_gpios, 1 },
  42         { },
  43 };
  44
  45 static int dwc3_pci_quirks(struct pci_dev *pdev)
  46 {
  47         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  48             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  49                 struct dwc3_platform_data pdata;
  50
  51                 memset(&pdata, 0, sizeof(pdata));
  52
  53                 pdata.has_lpm_erratum = true;
  54                 pdata.lpm_nyet_threshold = 0xf;
  55
  56                 pdata.u2exit_lfps_quirk = true;
  57                 pdata.u2ss_inp3_quirk = true;
  58                 pdata.req_p1p2p3_quirk = true;
  59                 pdata.del_p1p2p3_quirk = true;
  60                 pdata.del_phy_power_chg_quirk = true;
  61                 pdata.lfps_filter_quirk = true;
  62                 pdata.rx_detect_poll_quirk = true;
  63
  64                 pdata.tx_de_emphasis_quirk = true;
  65                 pdata.tx_de_emphasis = 1;
  66
  67                 /*
  68                  * FIXME these quirks should be removed when AMD NL
  69                  * taps out
  70                  */
  71                 pdata.disable_scramble_quirk = true;
  72                 pdata.dis_u3_susphy_quirk = true;
  73                 pdata.dis_u2_susphy_quirk = true;
  74
  75                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
  76                                                 sizeof(pdata));
  77         }
  78
  79         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
  80             pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  81                 struct gpio_desc *gpio;
  82
  83                 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  84                                           acpi_dwc3_byt_gpios);
  85
  86                 /* These GPIOs will turn on the USB2 PHY */
  87                 gpio = gpiod_get(&pdev->dev, "cs");
  88                 if (!IS_ERR(gpio)) {
  89                         gpiod_direction_output(gpio, 0);
  90                         gpiod_set_value_cansleep(gpio, 1);
  91                         gpiod_put(gpio);
  92                 }
  93
  94                 gpio = gpiod_get(&pdev->dev, "reset");
  95                 if (!IS_ERR(gpio)) {
  96                         gpiod_direction_output(gpio, 0);
  97                         gpiod_set_value_cansleep(gpio, 1);
  98                         gpiod_put(gpio);
  99                         usleep_range(10000, 11000);
 100                 }
 101         }
 102
 103         return 0;
 104 }
 105
 106 static int dwc3_pci_probe(struct pci_dev *pci,
 107                 const struct pci_device_id *id)
 108 {
 109         struct resource         res[2];
 110         struct platform_device  *dwc3;
 111         int                     ret;
 112         struct device           *dev = &pci->dev;
 113
 114         ret = pcim_enable_device(pci);
 115         if (ret) {
 116                 dev_err(dev, "failed to enable pci device\n");
 117                 return -ENODEV;
 118         }
 119
 120         pci_set_master(pci);
 121
 122         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 123         if (!dwc3) {
 124                 dev_err(dev, "couldn't allocate dwc3 device\n");
 125                 return -ENOMEM;
 126         }
 127
 128         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 129
 130         res[0].start    = pci_resource_start(pci, 0);
 131         res[0].end      = pci_resource_end(pci, 0);
 132         res[0].name     = "dwc_usb3";
 133         res[0].flags    = IORESOURCE_MEM;
 134
 135         res[1].start    = pci->irq;
 136         res[1].name     = "dwc_usb3";
 137         res[1].flags    = IORESOURCE_IRQ;
 138
 139         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 140         if (ret) {
 141                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 142                 return ret;
 143         }
 144
 145         pci_set_drvdata(pci, dwc3);
 146         ret = dwc3_pci_quirks(pci);
 147         if (ret)
 148                 goto err;
 149
 150         dwc3->dev.parent = dev;
 151
 152         ret = platform_device_add(dwc3);
 153         if (ret) {
 154                 dev_err(dev, "failed to register dwc3 device\n");
 155                 goto err;
 156         }
 157
 158         return 0;
 159 err:
 160         platform_device_put(dwc3);
 161         return ret;
 162 }
 163
 164 static void dwc3_pci_remove(struct pci_dev *pci)
 165 {
 166         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 167         platform_device_unregister(pci_get_drvdata(pci));
 168 }
 169
 170 static const struct pci_device_id dwc3_pci_id_table[] = {
 171         {
 172                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 173                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 174         },
 175         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 176         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 177         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 178         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 179         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 180         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 181         {  }    /* Terminating Entry */
 182 };
 183 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 184
 185 static struct pci_driver dwc3_pci_driver = {
 186         .name           = "dwc3-pci",
 187         .id_table       = dwc3_pci_id_table,
 188         .probe          = dwc3_pci_probe,
 189         .remove         = dwc3_pci_remove,
 190 };
 191
 192 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 193 MODULE_LICENSE("GPL v2");
 194 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 195
 196 module_pci_driver(dwc3_pci_driver);