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/pm_runtime.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/gpio/consumer.h>
  26 #include <linux/acpi.h>
  27 #include <linux/delay.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 property_entry properties[] = {
  55                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  56                         PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  57                         PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  58                         PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  59                         PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  60                         PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  61                         PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  62                         PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  63                         PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  64                         PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
  65                         PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
  66                         /*
  67                          * FIXME these quirks should be removed when AMD NL
  68                          * tapes out
  69                          */
  70                         PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
  71                         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
  72                         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
  73                         { },
  74                 };
  75
  76                 return platform_device_add_properties(dwc3, properties);
  77         }
  78
  79         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
  80                 int ret;
  81
  82                 struct property_entry properties[] = {
  83                         PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
  84                         { }
  85                 };
  86
  87                 ret = platform_device_add_properties(dwc3, properties);
  88                 if (ret < 0)
  89                         return ret;
  90
  91                 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  92                         struct gpio_desc *gpio;
  93
  94                         acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  95                                         acpi_dwc3_byt_gpios);
  96
  97                         /*
  98                          * These GPIOs will turn on the USB2 PHY. Note that we have to
  99                          * put the gpio descriptors again here because the phy driver
 100                          * might want to grab them, too.
 101                          */
 102                         gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 103                         if (IS_ERR(gpio))
 104                                 return PTR_ERR(gpio);
 105
 106                         gpiod_set_value_cansleep(gpio, 1);
 107                         gpiod_put(gpio);
 108
 109                         gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 110                         if (IS_ERR(gpio))
 111                                 return PTR_ERR(gpio);
 112
 113                         if (gpio) {
 114                                 gpiod_set_value_cansleep(gpio, 1);
 115                                 gpiod_put(gpio);
 116                                 usleep_range(10000, 11000);
 117                         }
 118                 }
 119         }
 120
 121         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 122             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 123              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 124              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 125                 struct property_entry properties[] = {
 126                         PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 127                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 128                         PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 129                         { },
 130                 };
 131
 132                 return platform_device_add_properties(dwc3, properties);
 133         }
 134
 135         return 0;
 136 }
 137
 138 static int dwc3_pci_probe(struct pci_dev *pci,
 139                 const struct pci_device_id *id)
 140 {
 141         struct resource         res[2];
 142         struct platform_device  *dwc3;
 143         int                     ret;
 144         struct device           *dev = &pci->dev;
 145
 146         ret = pcim_enable_device(pci);
 147         if (ret) {
 148                 dev_err(dev, "failed to enable pci device\n");
 149                 return -ENODEV;
 150         }
 151
 152         pci_set_master(pci);
 153
 154         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 155         if (!dwc3) {
 156                 dev_err(dev, "couldn't allocate dwc3 device\n");
 157                 return -ENOMEM;
 158         }
 159
 160         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 161
 162         res[0].start    = pci_resource_start(pci, 0);
 163         res[0].end      = pci_resource_end(pci, 0);
 164         res[0].name     = "dwc_usb3";
 165         res[0].flags    = IORESOURCE_MEM;
 166
 167         res[1].start    = pci->irq;
 168         res[1].name     = "dwc_usb3";
 169         res[1].flags    = IORESOURCE_IRQ;
 170
 171         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 172         if (ret) {
 173                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 174                 return ret;
 175         }
 176
 177         dwc3->dev.parent = dev;
 178         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 179
 180         ret = dwc3_pci_quirks(pci, dwc3);
 181         if (ret)
 182                 goto err;
 183
 184         ret = platform_device_add(dwc3);
 185         if (ret) {
 186                 dev_err(dev, "failed to register dwc3 device\n");
 187                 goto err;
 188         }
 189
 190         device_init_wakeup(dev, true);
 191         device_set_run_wake(dev, true);
 192         pci_set_drvdata(pci, dwc3);
 193         pm_runtime_put(dev);
 194
 195         return 0;
 196 err:
 197         platform_device_put(dwc3);
 198         return ret;
 199 }
 200
 201 static void dwc3_pci_remove(struct pci_dev *pci)
 202 {
 203         device_init_wakeup(&pci->dev, false);
 204         pm_runtime_get(&pci->dev);
 205         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 206         platform_device_unregister(pci_get_drvdata(pci));
 207 }
 208
 209 static const struct pci_device_id dwc3_pci_id_table[] = {
 210         {
 211                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 212                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 213         },
 214         {
 215                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 216                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 217         },
 218         {
 219                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 220                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 221         },
 222         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 223         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 224         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 225         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 226         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 227         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 228         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 229         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 230         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 231         {  }    /* Terminating Entry */
 232 };
 233 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 234
 235 #ifdef CONFIG_PM
 236 static int dwc3_pci_runtime_suspend(struct device *dev)
 237 {
 238         if (device_run_wake(dev))
 239                 return 0;
 240
 241         return -EBUSY;
 242 }
 243
 244 static int dwc3_pci_pm_dummy(struct device *dev)
 245 {
 246         /*
 247          * There's nothing to do here. No, seriously. Everything is either taken
 248          * care either by PCI subsystem or dwc3/core.c, so we have nothing
 249          * missing here.
 250          *
 251          * So you'd think we didn't need this at all, but PCI subsystem will
 252          * bail out if we don't have a valid callback :-s
 253          */
 254         return 0;
 255 }
 256 #endif /* CONFIG_PM */
 257
 258 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 259         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy)
 260         SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy,
 261                 NULL)
 262 };
 263
 264 static struct pci_driver dwc3_pci_driver = {
 265         .name           = "dwc3-pci",
 266         .id_table       = dwc3_pci_id_table,
 267         .probe          = dwc3_pci_probe,
 268         .remove         = dwc3_pci_remove,
 269         .driver         = {
 270                 .pm     = &dwc3_pci_dev_pm_ops,
 271         }
 272 };
 273
 274 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 275 MODULE_LICENSE("GPL v2");
 276 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 277
 278 module_pci_driver(dwc3_pci_driver);