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 <[email protected]>,
   7  *          Sebastian Andrzej Siewior <[email protected]>
   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 #define PCI_INTEL_BXT_DSM_UUID          "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
  43 #define PCI_INTEL_BXT_FUNC_PMU_PWR      4
  44 #define PCI_INTEL_BXT_STATE_D0          0
  45 #define PCI_INTEL_BXT_STATE_D3          3
  46
  47 /**
  48  * struct dwc3_pci - Driver private structure
  49  * @dwc3: child dwc3 platform_device
  50  * @pci: our link to PCI bus
  51  * @uuid: _DSM UUID
  52  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
  53  */
  54 struct dwc3_pci {
  55         struct platform_device *dwc3;
  56         struct pci_dev *pci;
  57
  58         u8 uuid[16];
  59
  60         unsigned int has_dsm_for_pm:1;
  61 };
  62
  63 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  64 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  65
  66 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  67         { "reset-gpios", &reset_gpios, 1 },
  68         { "cs-gpios", &cs_gpios, 1 },
  69         { },
  70 };
  71
  72 static int dwc3_pci_quirks(struct dwc3_pci *dwc)
  73 {
  74         struct platform_device          *dwc3 = dwc->dwc3;
  75         struct pci_dev                  *pdev = dwc->pci;
  76         int                             ret;
  77
  78         struct property_entry sysdev_property[] = {
  79                 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
  80                 { },
  81         };
  82
  83         ret = platform_device_add_properties(dwc3, sysdev_property);
  84         if (ret)
  85                 return ret;
  86
  87         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  88             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  89                 struct property_entry properties[] = {
  90                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  91                         PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  92                         PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  93                         PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  94                         PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  95                         PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  96                         PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  97                         PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  98                         PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  99                         PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
 100                         PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
 101                         /*
 102                          * FIXME these quirks should be removed when AMD NL
 103                          * tapes out
 104                          */
 105                         PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
 106                         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
 107                         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
 108                         { },
 109                 };
 110
 111                 return platform_device_add_properties(dwc3, properties);
 112         }
 113
 114         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 115                 int ret;
 116
 117                 struct property_entry properties[] = {
 118                         PROPERTY_ENTRY_STRING("dr-mode", "peripheral"),
 119                         { }
 120                 };
 121
 122                 ret = platform_device_add_properties(dwc3, properties);
 123                 if (ret < 0)
 124                         return ret;
 125
 126                 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
 127                                 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
 128                         acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
 129                         dwc->has_dsm_for_pm = true;
 130                 }
 131
 132                 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
 133                         struct gpio_desc *gpio;
 134
 135                         acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
 136                                         acpi_dwc3_byt_gpios);
 137
 138                         /*
 139                          * These GPIOs will turn on the USB2 PHY. Note that we have to
 140                          * put the gpio descriptors again here because the phy driver
 141                          * might want to grab them, too.
 142                          */
 143                         gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 144                         if (IS_ERR(gpio))
 145                                 return PTR_ERR(gpio);
 146
 147                         gpiod_set_value_cansleep(gpio, 1);
 148                         gpiod_put(gpio);
 149
 150                         gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 151                         if (IS_ERR(gpio))
 152                                 return PTR_ERR(gpio);
 153
 154                         if (gpio) {
 155                                 gpiod_set_value_cansleep(gpio, 1);
 156                                 gpiod_put(gpio);
 157                                 usleep_range(10000, 11000);
 158                         }
 159                 }
 160         }
 161
 162         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 163             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 164              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 165              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 166                 struct property_entry properties[] = {
 167                         PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 168                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 169                         PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 170                         { },
 171                 };
 172
 173                 return platform_device_add_properties(dwc3, properties);
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int dwc3_pci_probe(struct pci_dev *pci,
 180                 const struct pci_device_id *id)
 181 {
 182         struct dwc3_pci         *dwc;
 183         struct resource         res[2];
 184         int                     ret;
 185         struct device           *dev = &pci->dev;
 186
 187         ret = pcim_enable_device(pci);
 188         if (ret) {
 189                 dev_err(dev, "failed to enable pci device\n");
 190                 return -ENODEV;
 191         }
 192
 193         pci_set_master(pci);
 194
 195         dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
 196         if (!dwc)
 197                 return -ENOMEM;
 198
 199         dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 200         if (!dwc->dwc3)
 201                 return -ENOMEM;
 202
 203         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 204
 205         res[0].start    = pci_resource_start(pci, 0);
 206         res[0].end      = pci_resource_end(pci, 0);
 207         res[0].name     = "dwc_usb3";
 208         res[0].flags    = IORESOURCE_MEM;
 209
 210         res[1].start    = pci->irq;
 211         res[1].name     = "dwc_usb3";
 212         res[1].flags    = IORESOURCE_IRQ;
 213
 214         ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
 215         if (ret) {
 216                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 217                 return ret;
 218         }
 219
 220         dwc->pci = pci;
 221         dwc->dwc3->dev.parent = dev;
 222         ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
 223
 224         ret = dwc3_pci_quirks(dwc);
 225         if (ret)
 226                 goto err;
 227
 228         ret = platform_device_add(dwc->dwc3);
 229         if (ret) {
 230                 dev_err(dev, "failed to register dwc3 device\n");
 231                 goto err;
 232         }
 233
 234         device_init_wakeup(dev, true);
 235         device_set_run_wake(dev, true);
 236         pci_set_drvdata(pci, dwc);
 237         pm_runtime_put(dev);
 238
 239         return 0;
 240 err:
 241         platform_device_put(dwc->dwc3);
 242         return ret;
 243 }
 244
 245 static void dwc3_pci_remove(struct pci_dev *pci)
 246 {
 247         struct dwc3_pci         *dwc = pci_get_drvdata(pci);
 248
 249         device_init_wakeup(&pci->dev, false);
 250         pm_runtime_get(&pci->dev);
 251         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 252         platform_device_unregister(dwc->dwc3);
 253 }
 254
 255 static const struct pci_device_id dwc3_pci_id_table[] = {
 256         {
 257                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 258                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 259         },
 260         {
 261                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 262                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 263         },
 264         {
 265                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 266                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 267         },
 268         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 269         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 270         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 271         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 272         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 273         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 274         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 275         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 276         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 277         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 278         {  }    /* Terminating Entry */
 279 };
 280 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 281
 282 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
 283 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
 284 {
 285         union acpi_object *obj;
 286         union acpi_object tmp;
 287         union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
 288
 289         if (!dwc->has_dsm_for_pm)
 290                 return 0;
 291
 292         tmp.type = ACPI_TYPE_INTEGER;
 293         tmp.integer.value = param;
 294
 295         obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
 296                         1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
 297         if (!obj) {
 298                 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
 299                 return -EIO;
 300         }
 301
 302         ACPI_FREE(obj);
 303
 304         return 0;
 305 }
 306 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
 307
 308 #ifdef CONFIG_PM
 309 static int dwc3_pci_runtime_suspend(struct device *dev)
 310 {
 311         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 312
 313         if (device_run_wake(dev))
 314                 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 315
 316         return -EBUSY;
 317 }
 318
 319 static int dwc3_pci_runtime_resume(struct device *dev)
 320 {
 321         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 322         struct platform_device  *dwc3 = dwc->dwc3;
 323         int                     ret;
 324
 325         ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 326         if (ret)
 327                 return ret;
 328
 329         return pm_runtime_get(&dwc3->dev);
 330 }
 331 #endif /* CONFIG_PM */
 332
 333 #ifdef CONFIG_PM_SLEEP
 334 static int dwc3_pci_suspend(struct device *dev)
 335 {
 336         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 337
 338         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 339 }
 340
 341 static int dwc3_pci_resume(struct device *dev)
 342 {
 343         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 344
 345         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 346 }
 347 #endif /* CONFIG_PM_SLEEP */
 348
 349 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 350         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 351         SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
 352                 NULL)
 353 };
 354
 355 static struct pci_driver dwc3_pci_driver = {
 356         .name           = "dwc3-pci",
 357         .id_table       = dwc3_pci_id_table,
 358         .probe          = dwc3_pci_probe,
 359         .remove         = dwc3_pci_remove,
 360         .driver         = {
 361                 .pm     = &dwc3_pci_dev_pm_ops,
 362         }
 363 };
 364
 365 MODULE_AUTHOR("Felipe Balbi <[email protected]>");
 366 MODULE_LICENSE("GPL v2");
 367 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 368
 369 module_pci_driver(dwc3_pci_driver);