drivers/usb/dwc_otg_310/usbdev_rk3368.c

   1 #ifdef CONFIG_ARM64
   2 #include "usbdev_rk.h"
   3 #include "dwc_otg_regs.h"
   4
   5 static struct dwc_otg_control_usb *control_usb;
   6
   7 static u32 uoc_read(u32 reg)
   8 {
   9         unsigned int val;
  10
  11         regmap_read(control_usb->grf, reg, &val);
  12         return val;
  13 }
  14
  15 static void uoc_write(u32 value, u32 reg)
  16 {
  17         regmap_write(control_usb->grf, reg, value);
  18 }
  19
  20 #ifdef CONFIG_USB20_OTG
  21 static void usb20otg_hw_init(void)
  22 {
  23         /* Turn off differential receiver in suspend mode */
  24         uoc_write(UOC_HIWORD_UPDATE(0, 1, 2), 0x798);
  25
  26         /* Set disconnect detection trigger point to 600mv */
  27         uoc_write(UOC_HIWORD_UPDATE(0, 0xf, 11), 0x79c);
  28
  29         /* other haredware init,include:
  30          * DRV_VBUS GPIO init */
  31         if (gpio_is_valid(control_usb->otg_gpios->gpio))
  32                 gpio_set_value(control_usb->otg_gpios->gpio, 0);
  33 }
  34
  35 static void usb20otg_phy_suspend(void *pdata, int suspend)
  36 {
  37         struct dwc_otg_platform_data *usbpdata = pdata;
  38         if (suspend) {
  39                 /* enable soft control */
  40                 uoc_write(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0), 0x700);
  41                 usbpdata->phy_status = 1;
  42         } else {
  43                 /* exit suspend */
  44                 uoc_write(UOC_HIWORD_UPDATE(0x0, 0x1, 0), 0x700);
  45                 usbpdata->phy_status = 0;
  46         }
  47 }
  48
  49 static void usb20otg_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
  50 {
  51         struct dwc_otg_platform_data *usbpdata = pdata;
  52         struct reset_control *rst_otg_h, *rst_otg_p, *rst_otg_c;
  53
  54         rst_otg_h = devm_reset_control_get(usbpdata->dev, "otg_ahb");
  55         rst_otg_p = devm_reset_control_get(usbpdata->dev, "otg_phy");
  56         rst_otg_c = devm_reset_control_get(usbpdata->dev, "otg_controller");
  57         if (IS_ERR(rst_otg_h) || IS_ERR(rst_otg_p) || IS_ERR(rst_otg_c)) {
  58                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
  59                 return;
  60         }
  61
  62         switch (rst_type) {
  63         case RST_POR:
  64                 /* PHY reset */
  65                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x700);
  66                 reset_control_assert(rst_otg_p);
  67                 udelay(15);
  68                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x700);
  69                 udelay(1500);
  70                 reset_control_deassert(rst_otg_p);
  71                 udelay(2);
  72
  73                 /* Controller reset */
  74                 reset_control_assert(rst_otg_c);
  75                 reset_control_assert(rst_otg_h);
  76
  77                 udelay(2);
  78
  79                 reset_control_deassert(rst_otg_c);
  80                 reset_control_deassert(rst_otg_h);
  81                 break;
  82
  83         default:
  84                 break;
  85         }
  86 }
  87
  88 static void usb20otg_clock_init(void *pdata)
  89 {
  90         struct dwc_otg_platform_data *usbpdata = pdata;
  91         struct clk *ahbclk, *phyclk;
  92
  93         ahbclk = devm_clk_get(usbpdata->dev, "hclk_otg");
  94         if (IS_ERR(ahbclk)) {
  95                 dev_err(usbpdata->dev, "Failed to get hclk_usb0\n");
  96                 return;
  97         }
  98
  99         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy0");
 100         if (IS_ERR(phyclk)) {
 101                 dev_err(usbpdata->dev, "Failed to get clk_usbphy0\n");
 102                 return;
 103         }
 104
 105         usbpdata->phyclk = phyclk;
 106         usbpdata->ahbclk = ahbclk;
 107 }
 108
 109 static void usb20otg_clock_enable(void *pdata, int enable)
 110 {
 111         struct dwc_otg_platform_data *usbpdata = pdata;
 112
 113         if (enable) {
 114                 clk_prepare_enable(usbpdata->ahbclk);
 115                 clk_prepare_enable(usbpdata->phyclk);
 116         } else {
 117                 clk_disable_unprepare(usbpdata->ahbclk);
 118                 clk_disable_unprepare(usbpdata->phyclk);
 119         }
 120 }
 121
 122 static int usb20otg_get_status(int id)
 123 {
 124         int ret = -1;
 125         u32 soc_status15 = uoc_read(0x4bc);
 126
 127         switch (id) {
 128         case USB_STATUS_BVABLID:
 129                 /* bvalid in grf */
 130                 ret = soc_status15 & (0x1 << 23);
 131                 break;
 132         case USB_STATUS_DPDM:
 133                 /* dpdm in grf */
 134                 ret = soc_status15 & (0x3 << 24);
 135                 break;
 136         case USB_STATUS_ID:
 137                 /* id in grf */
 138                 ret = soc_status15 & (0x1 << 26);
 139                 break;
 140         case USB_CHIP_ID:
 141                 ret = control_usb->chip_id;
 142                 break;
 143         case USB_REMOTE_WAKEUP:
 144                 ret = control_usb->remote_wakeup;
 145                 break;
 146         case USB_IRQ_WAKEUP:
 147                 ret = control_usb->usb_irq_wakeup;
 148                 break;
 149         default:
 150                 break;
 151         }
 152         return ret;
 153 }
 154
 155 #ifdef CONFIG_RK_USB_UART
 156 /**
 157  *  dwc_otg_uart_enabled - check if a usb-uart bypass func is enabled in DT
 158  *
 159  *  Returns true if the status property of node "usb_uart" is set to "okay"
 160  *  or "ok", if this property is absent it will use the default status "ok"
 161  *  0 otherwise
 162  */
 163 static bool dwc_otg_uart_enabled(void)
 164 {
 165         return false;
 166 }
 167
 168 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 169 {
 170 }
 171 #else
 172 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 173 {
 174 }
 175 #endif
 176
 177 static void usb20otg_power_enable(int enable)
 178 {
 179         if (0 == enable) {
 180                 /* disable otg_drv power */
 181                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 182                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 183         } else if (1 == enable) {
 184                 /* enable otg_drv power */
 185                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 186                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 187         }
 188 }
 189
 190 struct dwc_otg_platform_data usb20otg_pdata_rk3368 = {
 191         .phyclk = NULL,
 192         .ahbclk = NULL,
 193         .busclk = NULL,
 194         .phy_status = 0,
 195         .hw_init = usb20otg_hw_init,
 196         .phy_suspend = usb20otg_phy_suspend,
 197         .soft_reset = usb20otg_soft_reset,
 198         .clock_init = usb20otg_clock_init,
 199         .clock_enable = usb20otg_clock_enable,
 200         .get_status = usb20otg_get_status,
 201         .power_enable = usb20otg_power_enable,
 202         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 203         .bc_detect_cb = rk_battery_charger_detect_cb,
 204 };
 205 #endif
 206
 207 #ifdef CONFIG_USB_EHCI_RK
 208 static void usb20ehci_hw_init(void)
 209 {
 210         /* Turn off differential receiver in suspend mode */
 211         uoc_write(UOC_HIWORD_UPDATE(0, 1, 2), 0x7b8);
 212         /* Set disconnect detection trigger point to 600mv */
 213         uoc_write(UOC_HIWORD_UPDATE(1, 0xf, 11), 0x7bc);
 214
 215         /* other haredware init,include:
 216          * DRV_VBUS GPIO init */
 217         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 218                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 219                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 220         }
 221 }
 222
 223 static void usb20ehci_phy_suspend(void *pdata, int suspend)
 224 {
 225         struct rkehci_platform_data *usbpdata = pdata;
 226
 227         if (suspend) {
 228                 /* enable soft control */
 229                 uoc_write(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0), 0x728);
 230                 usbpdata->phy_status = 1;
 231         } else {
 232                 /* exit suspend */
 233                 uoc_write(UOC_HIWORD_UPDATE(0x0, 0x1, 0), 0x728);
 234                 usbpdata->phy_status = 0;
 235         }
 236 }
 237
 238 static void usb20ehci_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 239 {
 240         struct rkehci_platform_data *usbpdata = pdata;
 241         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 242
 243         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 244         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 245         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 246         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 247                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 248                 return;
 249         }
 250
 251         switch (rst_type) {
 252         case RST_POR:
 253                 /* PHY reset */
 254                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x728);
 255                 reset_control_assert(rst_host_p);
 256                 udelay(15);
 257                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x728);
 258
 259                 udelay(1500);
 260                 reset_control_deassert(rst_host_p);
 261
 262                 /* Controller reset */
 263                 reset_control_assert(rst_host_c);
 264                 reset_control_assert(rst_host_h);
 265
 266                 udelay(5);
 267
 268                 reset_control_deassert(rst_host_c);
 269                 reset_control_deassert(rst_host_h);
 270                 break;
 271
 272         default:
 273                 break;
 274         }
 275 }
 276
 277 static void usb20ehci_clock_init(void *pdata)
 278 {
 279 }
 280
 281 static void usb20ehci_clock_enable(void *pdata, int enable)
 282 {
 283 }
 284
 285 static int usb20ehci_get_status(int id)
 286 {
 287         /* For HOST port in rk336x can not get any info from GRF */
 288         return -ENOENT;
 289 }
 290
 291 struct rkehci_platform_data usb20ehci_pdata_rk3368 = {
 292         .phyclk = NULL,
 293         .ahbclk = NULL,
 294         .phy_status = 0,
 295         .hw_init = usb20ehci_hw_init,
 296         .phy_suspend = usb20ehci_phy_suspend,
 297         .soft_reset = usb20ehci_soft_reset,
 298         .clock_init = usb20ehci_clock_init,
 299         .clock_enable = usb20ehci_clock_enable,
 300         .get_status = usb20ehci_get_status,
 301 };
 302 #endif
 303
 304 struct dwc_otg_platform_data usb20ohci_pdata_rk3368;
 305
 306 #ifdef CONFIG_OF
 307 static const struct of_device_id rk_usb_control_id_table[] = {
 308         {
 309          .compatible = "rockchip,rk3368-usb-control",
 310          },
 311         {},
 312 };
 313 #endif
 314 /*********************************************************************
 315                         rk3126 usb detections
 316 *********************************************************************/
 317
 318 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 319 static inline void do_wakeup(struct work_struct *work)
 320 {
 321         /* wake up the system */
 322         rk_send_wakeup_key();
 323 }
 324
 325 static void usb_battery_charger_detect_work(struct work_struct *work)
 326 {
 327         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 328 }
 329
 330 /********** handler for bvalid irq **********/
 331 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 332 {
 333         /* clear irq */
 334         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x6a0);
 335 #ifdef CONFIG_RK_USB_UART
 336         /* usb otg dp/dm switch to usb phy */
 337         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 338 #endif
 339
 340         if (control_usb->usb_irq_wakeup) {
 341                 wake_lock_timeout(&control_usb->usb_wakelock,
 342                                   WAKE_LOCK_TIMEOUT);
 343                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 344                                       HZ / 10);
 345         }
 346
 347         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 348
 349         return IRQ_HANDLED;
 350 }
 351
 352 /************* register usb detection irqs **************/
 353 static int otg_irq_detect_init(struct platform_device *pdev)
 354 {
 355         int ret = 0;
 356         int irq = 0;
 357
 358         wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 359                        "usb_detect");
 360         INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 361
 362         /*register otg_bvalid irq */
 363         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 364         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 365                 ret = request_irq(irq, bvalid_irq_handler,
 366                                   0, "otg_bvalid", NULL);
 367                 if (ret < 0) {
 368                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 369                 } else {
 370                         /* enable bvalid irq  */
 371                         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x680);
 372                 }
 373         }
 374
 375         return 0;
 376 }
 377
 378 /********** end of usb detections **********/
 379 #ifdef CONFIG_OF
 380 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 381         {
 382          .compatible = "rockchip,rk3368-dwc-control-usb",
 383          },
 384         {},
 385 };
 386 #endif
 387 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 388 {
 389         struct device *dev = &pdev->dev;
 390         struct device_node *np = dev->of_node;
 391         struct clk *hclk_usb_peri;
 392         struct regmap *grf;
 393         int gpio, ret = 0;
 394
 395         control_usb = devm_kzalloc(dev, sizeof(*control_usb), GFP_KERNEL);
 396         if (!control_usb) {
 397                 dev_err(&pdev->dev, "Unable to alloc memory for control usb\n");
 398                 return -ENOMEM;
 399         }
 400
 401         /* Init regmap GRF */
 402         grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
 403         if (IS_ERR(grf)) {
 404                 dev_err(&pdev->dev, "Missing rockchip,grf property\n");
 405                 return PTR_ERR(grf);
 406         }
 407         control_usb->grf = grf;
 408
 409         /* Init Vbus-drv GPIOs */
 410         control_usb->host_gpios =
 411             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 412         if (!control_usb->host_gpios) {
 413                 dev_err(&pdev->dev, "Unable to alloc memory for host_gpios\n");
 414                 return -ENOMEM;
 415         }
 416
 417         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 418         control_usb->host_gpios->gpio = gpio;
 419
 420         if (gpio_is_valid(gpio)) {
 421                 if (devm_gpio_request(&pdev->dev, gpio, "usb_host_drv")) {
 422                         dev_err(&pdev->dev,
 423                                 "Failed to request GPIO%d for host_drv\n",
 424                                 gpio);
 425                         return -EINVAL;
 426                 }
 427                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 428         }
 429
 430         control_usb->otg_gpios =
 431             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 432         if (!control_usb->otg_gpios) {
 433                 dev_err(&pdev->dev, "Unable to alloc memory for otg_gpios\n");
 434                 return -ENOMEM;
 435         }
 436
 437         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 438         control_usb->otg_gpios->gpio = gpio;
 439
 440         if (gpio_is_valid(gpio)) {
 441                 if (devm_gpio_request(&pdev->dev, gpio, "usb_otg_drv")) {
 442                         dev_err(&pdev->dev,
 443                                 "failed to request GPIO%d for otg_drv\n", gpio);
 444                         return -EINVAL;
 445                 }
 446                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 447         }
 448
 449
 450         control_usb->remote_wakeup = of_property_read_bool(np,
 451                                                            "rockchip,remote_wakeup");
 452         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 453                                                             "rockchip,usb_irq_wakeup");
 454
 455         /* Init hclk_usb_peri */
 456         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 457         if (IS_ERR(hclk_usb_peri)) {
 458                 dev_err(&pdev->dev, "Failed to get hclk_usb_peri\n");
 459                 return PTR_ERR(hclk_usb_peri);
 460         }
 461         control_usb->hclk_usb_peri = hclk_usb_peri;
 462         clk_prepare_enable(hclk_usb_peri);
 463
 464 #ifdef CONFIG_USB20_OTG
 465         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 466                           usb_battery_charger_detect_work);
 467
 468         if (usb20otg_get_status(USB_STATUS_BVABLID))
 469                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 470                                       HZ / 10);
 471 #endif
 472
 473         ret = otg_irq_detect_init(pdev);
 474         if (ret < 0)
 475                 goto err;
 476
 477         return 0;
 478
 479 err:
 480         clk_disable_unprepare(hclk_usb_peri);
 481         return ret;
 482 }
 483
 484 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 485 {
 486         clk_disable_unprepare(control_usb->hclk_usb_peri);
 487         return 0;
 488 }
 489
 490 static struct platform_driver dwc_otg_control_usb_driver = {
 491         .probe = dwc_otg_control_usb_probe,
 492         .remove = dwc_otg_control_usb_remove,
 493         .driver = {
 494                    .name = "rk3368-dwc-control-usb",
 495                    .owner = THIS_MODULE,
 496                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 497                    },
 498 };
 499
 500 static int __init dwc_otg_control_usb_init(void)
 501 {
 502         int retval = 0;
 503
 504         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 505         return retval;
 506 }
 507
 508 subsys_initcall(dwc_otg_control_usb_init);
 509
 510 static void __exit dwc_otg_control_usb_exit(void)
 511 {
 512         platform_driver_unregister(&dwc_otg_control_usb_driver);
 513 }
 514
 515 module_exit(dwc_otg_control_usb_exit);
 516 MODULE_ALIAS("platform: dwc_control_usb");
 517 MODULE_AUTHOR("RockChip Inc.");
 518 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 519 MODULE_LICENSE("GPL v2");
 520 #endif