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 #define PCI_DEVICE_ID_INTEL_KBP                 0xa2b0
  41
  42 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  43 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  44
  45 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  46         { "reset-gpios", &reset_gpios, 1 },
  47         { "cs-gpios", &cs_gpios, 1 },
  48         { },
  49 };
  50
  51 static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3)
  52 {
  53         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  54             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  55                 struct property_entry properties[] = {
  56                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  57                         PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  58                         PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  59                         PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  60                         PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  61                         PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  62                         PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  63                         PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  64                         PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  65                         PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
  66                         PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
  67                         /*
  68                          * FIXME these quirks should be removed when AMD NL
  69                          * tapes out
  70                          */
  71                         PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
  72                         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
  73                         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
  74                         { },
  75                 };
  76
  77                 return platform_device_add_properties(dwc3, properties);
  78         }
  79
  80         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
  81                 int ret;
  82
  83                 struct property_entry properties[] = {
  84                         PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
  85                         { }
  86                 };
  87
  88                 ret = platform_device_add_properties(dwc3, properties);
  89                 if (ret < 0)
  90                         return ret;
  91
  92                 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
  93                         struct gpio_desc *gpio;
  94
  95                         acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
  96                                         acpi_dwc3_byt_gpios);
  97
  98                         /*
  99                          * These GPIOs will turn on the USB2 PHY. Note that we have to
 100                          * put the gpio descriptors again here because the phy driver
 101                          * might want to grab them, too.
 102                          */
 103                         gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 104                         if (IS_ERR(gpio))
 105                                 return PTR_ERR(gpio);
 106
 107                         gpiod_set_value_cansleep(gpio, 1);
 108                         gpiod_put(gpio);
 109
 110                         gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 111                         if (IS_ERR(gpio))
 112                                 return PTR_ERR(gpio);
 113
 114                         if (gpio) {
 115                                 gpiod_set_value_cansleep(gpio, 1);
 116                                 gpiod_put(gpio);
 117                                 usleep_range(10000, 11000);
 118                         }
 119                 }
 120         }
 121
 122         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 123             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 124              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 125              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 126                 struct property_entry properties[] = {
 127                         PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 128                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 129                         PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 130                         { },
 131                 };
 132
 133                 return platform_device_add_properties(dwc3, properties);
 134         }
 135
 136         return 0;
 137 }
 138
 139 static int dwc3_pci_probe(struct pci_dev *pci,
 140                 const struct pci_device_id *id)
 141 {
 142         struct resource         res[2];
 143         struct platform_device  *dwc3;
 144         int                     ret;
 145         struct device           *dev = &pci->dev;
 146
 147         ret = pcim_enable_device(pci);
 148         if (ret) {
 149                 dev_err(dev, "failed to enable pci device\n");
 150                 return -ENODEV;
 151         }
 152
 153         pci_set_master(pci);
 154
 155         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 156         if (!dwc3) {
 157                 dev_err(dev, "couldn't allocate dwc3 device\n");
 158                 return -ENOMEM;
 159         }
 160
 161         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 162
 163         res[0].start    = pci_resource_start(pci, 0);
 164         res[0].end      = pci_resource_end(pci, 0);
 165         res[0].name     = "dwc_usb3";
 166         res[0].flags    = IORESOURCE_MEM;
 167
 168         res[1].start    = pci->irq;
 169         res[1].name     = "dwc_usb3";
 170         res[1].flags    = IORESOURCE_IRQ;
 171
 172         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 173         if (ret) {
 174                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 175                 return ret;
 176         }
 177
 178         dwc3->dev.parent = dev;
 179         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
 180
 181         ret = dwc3_pci_quirks(pci, dwc3);
 182         if (ret)
 183                 goto err;
 184
 185         ret = platform_device_add(dwc3);
 186         if (ret) {
 187                 dev_err(dev, "failed to register dwc3 device\n");
 188                 goto err;
 189         }
 190
 191         device_init_wakeup(dev, true);
 192         device_set_run_wake(dev, true);
 193         pci_set_drvdata(pci, dwc3);
 194         pm_runtime_put(dev);
 195
 196         return 0;
 197 err:
 198         platform_device_put(dwc3);
 199         return ret;
 200 }
 201
 202 static void dwc3_pci_remove(struct pci_dev *pci)
 203 {
 204         device_init_wakeup(&pci->dev, false);
 205         pm_runtime_get(&pci->dev);
 206         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 207         platform_device_unregister(pci_get_drvdata(pci));
 208 }
 209
 210 static const struct pci_device_id dwc3_pci_id_table[] = {
 211         {
 212                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 213                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 214         },
 215         {
 216                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 217                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 218         },
 219         {
 220                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 221                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 222         },
 223         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 224         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 225         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 226         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 227         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 228         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 229         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 230         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 231         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 232         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 233         {  }    /* Terminating Entry */
 234 };
 235 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 236
 237 #ifdef CONFIG_PM
 238 static int dwc3_pci_runtime_suspend(struct device *dev)
 239 {
 240         if (device_run_wake(dev))
 241                 return 0;
 242
 243         return -EBUSY;
 244 }
 245
 246 static int dwc3_pci_pm_dummy(struct device *dev)
 247 {
 248         /*
 249          * There's nothing to do here. No, seriously. Everything is either taken
 250          * care either by PCI subsystem or dwc3/core.c, so we have nothing
 251          * missing here.
 252          *
 253          * So you'd think we didn't need this at all, but PCI subsystem will
 254          * bail out if we don't have a valid callback :-s
 255          */
 256         return 0;
 257 }
 258 #endif /* CONFIG_PM */
 259
 260 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 261         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy)
 262         SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy,
 263                 NULL)
 264 };
 265
 266 static struct pci_driver dwc3_pci_driver = {
 267         .name           = "dwc3-pci",
 268         .id_table       = dwc3_pci_id_table,
 269         .probe          = dwc3_pci_probe,
 270         .remove         = dwc3_pci_remove,
 271         .driver         = {
 272                 .pm     = &dwc3_pci_dev_pm_ops,
 273         }
 274 };
 275
 276 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 277 MODULE_LICENSE("GPL v2");
 278 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 279
 280 module_pci_driver(dwc3_pci_driver);