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 #define PCI_DEVICE_ID_INTEL_GLK                 0x31aa
  42
  43 #define PCI_INTEL_BXT_DSM_UUID          "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
  44 #define PCI_INTEL_BXT_FUNC_PMU_PWR      4
  45 #define PCI_INTEL_BXT_STATE_D0          0
  46 #define PCI_INTEL_BXT_STATE_D3          3
  47
  48 /**
  49  * struct dwc3_pci - Driver private structure
  50  * @dwc3: child dwc3 platform_device
  51  * @pci: our link to PCI bus
  52  * @uuid: _DSM UUID
  53  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
  54  */
  55 struct dwc3_pci {
  56         struct platform_device *dwc3;
  57         struct pci_dev *pci;
  58
  59         u8 uuid[16];
  60
  61         unsigned int has_dsm_for_pm:1;
  62 };
  63
  64 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  65 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  66
  67 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  68         { "reset-gpios", &reset_gpios, 1 },
  69         { "cs-gpios", &cs_gpios, 1 },
  70         { },
  71 };
  72
  73 static int dwc3_pci_quirks(struct dwc3_pci *dwc)
  74 {
  75         struct platform_device          *dwc3 = dwc->dwc3;
  76         struct pci_dev                  *pdev = dwc->pci;
  77
  78         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  79             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  80                 struct property_entry properties[] = {
  81                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  82                         PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  83                         PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  84                         PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  85                         PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  86                         PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  87                         PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  88                         PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  89                         PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  90                         PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
  91                         PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
  92                         /*
  93                          * FIXME these quirks should be removed when AMD NL
  94                          * tapes out
  95                          */
  96                         PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
  97                         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
  98                         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
  99                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 100                         { },
 101                 };
 102
 103                 return platform_device_add_properties(dwc3, properties);
 104         }
 105
 106         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 107                 int ret;
 108
 109                 struct property_entry properties[] = {
 110                         PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
 111                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 112                         { }
 113                 };
 114
 115                 ret = platform_device_add_properties(dwc3, properties);
 116                 if (ret < 0)
 117                         return ret;
 118
 119                 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
 120                                 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
 121                         acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
 122                         dwc->has_dsm_for_pm = true;
 123                 }
 124
 125                 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
 126                         struct gpio_desc *gpio;
 127
 128                         ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
 129                                         acpi_dwc3_byt_gpios);
 130                         if (ret)
 131                                 dev_dbg(&pdev->dev, "failed to add mapping table\n");
 132
 133                         /*
 134                          * These GPIOs will turn on the USB2 PHY. Note that we have to
 135                          * put the gpio descriptors again here because the phy driver
 136                          * might want to grab them, too.
 137                          */
 138                         gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 139                         if (IS_ERR(gpio))
 140                                 return PTR_ERR(gpio);
 141
 142                         gpiod_set_value_cansleep(gpio, 1);
 143                         gpiod_put(gpio);
 144
 145                         gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 146                         if (IS_ERR(gpio))
 147                                 return PTR_ERR(gpio);
 148
 149                         if (gpio) {
 150                                 gpiod_set_value_cansleep(gpio, 1);
 151                                 gpiod_put(gpio);
 152                                 usleep_range(10000, 11000);
 153                         }
 154                 }
 155         }
 156
 157         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 158             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 159              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 160              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 161                 struct property_entry properties[] = {
 162                         PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 163                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 164                         PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 165                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 166                         { },
 167                 };
 168
 169                 return platform_device_add_properties(dwc3, properties);
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int dwc3_pci_probe(struct pci_dev *pci,
 176                 const struct pci_device_id *id)
 177 {
 178         struct dwc3_pci         *dwc;
 179         struct resource         res[2];
 180         int                     ret;
 181         struct device           *dev = &pci->dev;
 182
 183         ret = pcim_enable_device(pci);
 184         if (ret) {
 185                 dev_err(dev, "failed to enable pci device\n");
 186                 return -ENODEV;
 187         }
 188
 189         pci_set_master(pci);
 190
 191         dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
 192         if (!dwc)
 193                 return -ENOMEM;
 194
 195         dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 196         if (!dwc->dwc3)
 197                 return -ENOMEM;
 198
 199         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 200
 201         res[0].start    = pci_resource_start(pci, 0);
 202         res[0].end      = pci_resource_end(pci, 0);
 203         res[0].name     = "dwc_usb3";
 204         res[0].flags    = IORESOURCE_MEM;
 205
 206         res[1].start    = pci->irq;
 207         res[1].name     = "dwc_usb3";
 208         res[1].flags    = IORESOURCE_IRQ;
 209
 210         ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
 211         if (ret) {
 212                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 213                 return ret;
 214         }
 215
 216         dwc->pci = pci;
 217         dwc->dwc3->dev.parent = dev;
 218         ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
 219
 220         ret = dwc3_pci_quirks(dwc);
 221         if (ret)
 222                 goto err;
 223
 224         ret = platform_device_add(dwc->dwc3);
 225         if (ret) {
 226                 dev_err(dev, "failed to register dwc3 device\n");
 227                 goto err;
 228         }
 229
 230         device_init_wakeup(dev, true);
 231         device_set_run_wake(dev, true);
 232         pci_set_drvdata(pci, dwc);
 233         pm_runtime_put(dev);
 234
 235         return 0;
 236 err:
 237         platform_device_put(dwc->dwc3);
 238         return ret;
 239 }
 240
 241 static void dwc3_pci_remove(struct pci_dev *pci)
 242 {
 243         struct dwc3_pci         *dwc = pci_get_drvdata(pci);
 244
 245         device_init_wakeup(&pci->dev, false);
 246         pm_runtime_get(&pci->dev);
 247         platform_device_unregister(dwc->dwc3);
 248 }
 249
 250 static const struct pci_device_id dwc3_pci_id_table[] = {
 251         {
 252                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 253                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 254         },
 255         {
 256                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 257                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 258         },
 259         {
 260                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 261                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 262         },
 263         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 264         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 265         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 266         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 267         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 268         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 269         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 270         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 271         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 272         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
 273         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 274         {  }    /* Terminating Entry */
 275 };
 276 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 277
 278 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
 279 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
 280 {
 281         union acpi_object *obj;
 282         union acpi_object tmp;
 283         union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
 284
 285         if (!dwc->has_dsm_for_pm)
 286                 return 0;
 287
 288         tmp.type = ACPI_TYPE_INTEGER;
 289         tmp.integer.value = param;
 290
 291         obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
 292                         1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
 293         if (!obj) {
 294                 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
 295                 return -EIO;
 296         }
 297
 298         ACPI_FREE(obj);
 299
 300         return 0;
 301 }
 302 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
 303
 304 #ifdef CONFIG_PM
 305 static int dwc3_pci_runtime_suspend(struct device *dev)
 306 {
 307         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 308
 309         if (device_run_wake(dev))
 310                 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 311
 312         return -EBUSY;
 313 }
 314
 315 static int dwc3_pci_runtime_resume(struct device *dev)
 316 {
 317         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 318         struct platform_device  *dwc3 = dwc->dwc3;
 319         int                     ret;
 320
 321         ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 322         if (ret)
 323                 return ret;
 324
 325         return pm_runtime_get(&dwc3->dev);
 326 }
 327 #endif /* CONFIG_PM */
 328
 329 #ifdef CONFIG_PM_SLEEP
 330 static int dwc3_pci_suspend(struct device *dev)
 331 {
 332         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 333
 334         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 335 }
 336
 337 static int dwc3_pci_resume(struct device *dev)
 338 {
 339         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 340
 341         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 342 }
 343 #endif /* CONFIG_PM_SLEEP */
 344
 345 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 346         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 347         SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
 348                 NULL)
 349 };
 350
 351 static struct pci_driver dwc3_pci_driver = {
 352         .name           = "dwc3-pci",
 353         .id_table       = dwc3_pci_id_table,
 354         .probe          = dwc3_pci_probe,
 355         .remove         = dwc3_pci_remove,
 356         .driver         = {
 357                 .pm     = &dwc3_pci_dev_pm_ops,
 358         }
 359 };
 360
 361 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 362 MODULE_LICENSE("GPL v2");
 363 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 364
 365 module_pci_driver(dwc3_pci_driver);