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 #define PCI_DEVICE_ID_INTEL_CNPLP               0x9dee
  43 #define PCI_DEVICE_ID_INTEL_CNPH                0xa36e
  44
  45 #define PCI_INTEL_BXT_DSM_GUID          "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
  46 #define PCI_INTEL_BXT_FUNC_PMU_PWR      4
  47 #define PCI_INTEL_BXT_STATE_D0          0
  48 #define PCI_INTEL_BXT_STATE_D3          3
  49
  50 /**
  51  * struct dwc3_pci - Driver private structure
  52  * @dwc3: child dwc3 platform_device
  53  * @pci: our link to PCI bus
  54  * @guid: _DSM GUID
  55  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
  56  */
  57 struct dwc3_pci {
  58         struct platform_device *dwc3;
  59         struct pci_dev *pci;
  60
  61         guid_t guid;
  62
  63         unsigned int has_dsm_for_pm:1;
  64 };
  65
  66 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
  67 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
  68
  69 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
  70         { "reset-gpios", &reset_gpios, 1 },
  71         { "cs-gpios", &cs_gpios, 1 },
  72         { },
  73 };
  74
  75 static int dwc3_pci_quirks(struct dwc3_pci *dwc)
  76 {
  77         struct platform_device          *dwc3 = dwc->dwc3;
  78         struct pci_dev                  *pdev = dwc->pci;
  79
  80         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  81             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  82                 struct property_entry properties[] = {
  83                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
  84                         PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
  85                         PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
  86                         PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
  87                         PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
  88                         PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
  89                         PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
  90                         PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
  91                         PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
  92                         PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
  93                         PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
  94                         /*
  95                          * FIXME these quirks should be removed when AMD NL
  96                          * tapes out
  97                          */
  98                         PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
  99                         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
 100                         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
 101                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 102                         { },
 103                 };
 104
 105                 return platform_device_add_properties(dwc3, properties);
 106         }
 107
 108         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 109                 int ret;
 110
 111                 struct property_entry properties[] = {
 112                         PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
 113                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 114                         { }
 115                 };
 116
 117                 ret = platform_device_add_properties(dwc3, properties);
 118                 if (ret < 0)
 119                         return ret;
 120
 121                 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
 122                                 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
 123                         guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
 124                         dwc->has_dsm_for_pm = true;
 125                 }
 126
 127                 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
 128                         struct gpio_desc *gpio;
 129
 130                         ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
 131                                         acpi_dwc3_byt_gpios);
 132                         if (ret)
 133                                 dev_dbg(&pdev->dev, "failed to add mapping table\n");
 134
 135                         /*
 136                          * These GPIOs will turn on the USB2 PHY. Note that we have to
 137                          * put the gpio descriptors again here because the phy driver
 138                          * might want to grab them, too.
 139                          */
 140                         gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 141                         if (IS_ERR(gpio))
 142                                 return PTR_ERR(gpio);
 143
 144                         gpiod_set_value_cansleep(gpio, 1);
 145                         gpiod_put(gpio);
 146
 147                         gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
 148                         if (IS_ERR(gpio))
 149                                 return PTR_ERR(gpio);
 150
 151                         if (gpio) {
 152                                 gpiod_set_value_cansleep(gpio, 1);
 153                                 gpiod_put(gpio);
 154                                 usleep_range(10000, 11000);
 155                         }
 156                 }
 157         }
 158
 159         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 160             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
 161              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
 162              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
 163                 struct property_entry properties[] = {
 164                         PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
 165                         PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
 166                         PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
 167                         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 168                         { },
 169                 };
 170
 171                 return platform_device_add_properties(dwc3, properties);
 172         }
 173
 174         return 0;
 175 }
 176
 177 static int dwc3_pci_probe(struct pci_dev *pci,
 178                 const struct pci_device_id *id)
 179 {
 180         struct dwc3_pci         *dwc;
 181         struct resource         res[2];
 182         int                     ret;
 183         struct device           *dev = &pci->dev;
 184
 185         ret = pcim_enable_device(pci);
 186         if (ret) {
 187                 dev_err(dev, "failed to enable pci device\n");
 188                 return -ENODEV;
 189         }
 190
 191         pci_set_master(pci);
 192
 193         dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
 194         if (!dwc)
 195                 return -ENOMEM;
 196
 197         dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 198         if (!dwc->dwc3)
 199                 return -ENOMEM;
 200
 201         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 202
 203         res[0].start    = pci_resource_start(pci, 0);
 204         res[0].end      = pci_resource_end(pci, 0);
 205         res[0].name     = "dwc_usb3";
 206         res[0].flags    = IORESOURCE_MEM;
 207
 208         res[1].start    = pci->irq;
 209         res[1].name     = "dwc_usb3";
 210         res[1].flags    = IORESOURCE_IRQ;
 211
 212         ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
 213         if (ret) {
 214                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 215                 return ret;
 216         }
 217
 218         dwc->pci = pci;
 219         dwc->dwc3->dev.parent = dev;
 220         ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
 221
 222         ret = dwc3_pci_quirks(dwc);
 223         if (ret)
 224                 goto err;
 225
 226         ret = platform_device_add(dwc->dwc3);
 227         if (ret) {
 228                 dev_err(dev, "failed to register dwc3 device\n");
 229                 goto err;
 230         }
 231
 232         device_init_wakeup(dev, true);
 233         pci_set_drvdata(pci, dwc);
 234         pm_runtime_put(dev);
 235
 236         return 0;
 237 err:
 238         platform_device_put(dwc->dwc3);
 239         return ret;
 240 }
 241
 242 static void dwc3_pci_remove(struct pci_dev *pci)
 243 {
 244         struct dwc3_pci         *dwc = pci_get_drvdata(pci);
 245
 246         device_init_wakeup(&pci->dev, false);
 247         pm_runtime_get(&pci->dev);
 248         platform_device_unregister(dwc->dwc3);
 249 }
 250
 251 static const struct pci_device_id dwc3_pci_id_table[] = {
 252         {
 253                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 254                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 255         },
 256         {
 257                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 258                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
 259         },
 260         {
 261                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 262                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
 263         },
 264         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 265         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 266         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 267         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 268         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 269         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
 270         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
 271         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 272         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 273         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
 274         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPLP), },
 275         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPH), },
 276         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 277         {  }    /* Terminating Entry */
 278 };
 279 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 280
 281 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
 282 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
 283 {
 284         union acpi_object *obj;
 285         union acpi_object tmp;
 286         union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
 287
 288         if (!dwc->has_dsm_for_pm)
 289                 return 0;
 290
 291         tmp.type = ACPI_TYPE_INTEGER;
 292         tmp.integer.value = param;
 293
 294         obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
 295                         1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
 296         if (!obj) {
 297                 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
 298                 return -EIO;
 299         }
 300
 301         ACPI_FREE(obj);
 302
 303         return 0;
 304 }
 305 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
 306
 307 #ifdef CONFIG_PM
 308 static int dwc3_pci_runtime_suspend(struct device *dev)
 309 {
 310         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 311
 312         if (device_can_wakeup(dev))
 313                 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 314
 315         return -EBUSY;
 316 }
 317
 318 static int dwc3_pci_runtime_resume(struct device *dev)
 319 {
 320         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 321         struct platform_device  *dwc3 = dwc->dwc3;
 322         int                     ret;
 323
 324         ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 325         if (ret)
 326                 return ret;
 327
 328         return pm_runtime_get(&dwc3->dev);
 329 }
 330 #endif /* CONFIG_PM */
 331
 332 #ifdef CONFIG_PM_SLEEP
 333 static int dwc3_pci_suspend(struct device *dev)
 334 {
 335         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 336
 337         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
 338 }
 339
 340 static int dwc3_pci_resume(struct device *dev)
 341 {
 342         struct dwc3_pci         *dwc = dev_get_drvdata(dev);
 343
 344         return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 345 }
 346 #endif /* CONFIG_PM_SLEEP */
 347
 348 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 349         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 350         SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
 351                 NULL)
 352 };
 353
 354 static struct pci_driver dwc3_pci_driver = {
 355         .name           = "dwc3-pci",
 356         .id_table       = dwc3_pci_id_table,
 357         .probe          = dwc3_pci_probe,
 358         .remove         = dwc3_pci_remove,
 359         .driver         = {
 360                 .pm     = &dwc3_pci_dev_pm_ops,
 361         }
 362 };
 363
 364 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 365 MODULE_LICENSE("GPL v2");
 366 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 367
 368 module_pci_driver(dwc3_pci_driver);