drivers/usb/dwc_otg_310/usbdev_rk3036.c

   1 #ifdef CONFIG_ARM
   2 #include "usbdev_rk.h"
   3 #include "usbdev_grf_regs.h"
   4 #include "dwc_otg_regs.h"
   5 static struct dwc_otg_control_usb *control_usb;
   6
   7 #ifdef CONFIG_USB20_OTG
   8 static void usb20otg_hw_init(void)
   9 {
  10         /* other haredware init,include:
  11          * DRV_VBUS GPIO init */
  12         if (gpio_is_valid(control_usb->otg_gpios->gpio)) {
  13                 if (gpio_get_value(control_usb->otg_gpios->gpio))
  14                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
  15         }
  16 }
  17
  18 static void usb20otg_phy_suspend(void *pdata, int suspend)
  19 {
  20         struct dwc_otg_platform_data *usbpdata = pdata;
  21
  22         if (suspend) {
  23                 /* enable soft control */
  24                 writel(UOC_HIWORD_UPDATE(0x1d1, 0x1ff, 0),
  25                        RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  26                 usbpdata->phy_status = 1;
  27         } else {
  28                 /* exit suspend */
  29                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
  30                        RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  31                 usbpdata->phy_status = 0;
  32         }
  33 }
  34
  35 static void usb20otg_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
  36 {
  37         struct dwc_otg_platform_data *usbpdata = pdata;
  38         struct reset_control *rst_otg_h, *rst_otg_p, *rst_otg_c;
  39
  40         rst_otg_h = devm_reset_control_get(usbpdata->dev, "otg_ahb");
  41         rst_otg_p = devm_reset_control_get(usbpdata->dev, "otg_phy");
  42         rst_otg_c = devm_reset_control_get(usbpdata->dev, "otg_controller");
  43         if (IS_ERR(rst_otg_h) || IS_ERR(rst_otg_p) || IS_ERR(rst_otg_c)) {
  44                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
  45                 return;
  46         }
  47
  48         switch(rst_type) {
  49         case RST_POR:
  50                 /* PHY reset */
  51                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
  52                            RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  53                 reset_control_assert(rst_otg_p);
  54                 udelay(15);
  55                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
  56                            RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  57                 udelay(1500);
  58                 reset_control_deassert(rst_otg_p);
  59                 udelay(2);
  60
  61                 /* Controller reset */
  62                 reset_control_assert(rst_otg_c);
  63                 reset_control_assert(rst_otg_h);
  64
  65                 udelay(2);
  66
  67                 reset_control_deassert(rst_otg_c);
  68                 reset_control_deassert(rst_otg_h);
  69                 break;
  70
  71         default:
  72                 break;
  73         }
  74 }
  75
  76 static void usb20otg_clock_init(void *pdata)
  77 {
  78         struct dwc_otg_platform_data *usbpdata = pdata;
  79         struct clk *ahbclk, *phyclk;
  80
  81         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb0");
  82         if (IS_ERR(ahbclk)) {
  83                 dev_err(usbpdata->dev, "Failed to get hclk_usb0\n");
  84                 return;
  85         }
  86
  87         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy0");
  88         if (IS_ERR(phyclk)) {
  89                 dev_err(usbpdata->dev, "Failed to get clk_usbphy0\n");
  90                 return;
  91         }
  92
  93         usbpdata->phyclk = phyclk;
  94         usbpdata->ahbclk = ahbclk;
  95 }
  96
  97 static void usb20otg_clock_enable(void *pdata, int enable)
  98 {
  99         struct dwc_otg_platform_data *usbpdata = pdata;
 100
 101         if (enable) {
 102                 clk_prepare_enable(usbpdata->ahbclk);
 103                 clk_prepare_enable(usbpdata->phyclk);
 104         } else {
 105                 clk_disable_unprepare(usbpdata->ahbclk);
 106                 /*
 107                    clk_disable_unprepare(usbpdata->phyclk);
 108                  */
 109         }
 110 }
 111
 112 static int usb20otg_get_status(int id)
 113 {
 114         int ret = -1;
 115         u32 soc_status0 = readl(RK_GRF_VIRT + RK3036_GRF_SOC_STATUS0);
 116
 117         switch (id) {
 118         case USB_STATUS_BVABLID:
 119                 /* bvalid in grf */
 120                 ret = soc_status0 & (0x1 << 8);
 121                 break;
 122         case USB_STATUS_DPDM:
 123                 /* dpdm in grf */
 124                 ret = soc_status0 & (0x3 << 9);
 125                 break;
 126         case USB_STATUS_ID:
 127                 /* id in grf */
 128                 ret = soc_status0 & (0x1 << 11);
 129                 break;
 130         case USB_CHIP_ID:
 131                 ret = control_usb->chip_id;
 132                 break;
 133         case USB_REMOTE_WAKEUP:
 134                 ret = control_usb->remote_wakeup;
 135                 break;
 136         case USB_IRQ_WAKEUP:
 137                 ret = control_usb->usb_irq_wakeup;
 138                 break;
 139         default:
 140                 break;
 141         }
 142         return ret;
 143 }
 144
 145 #ifdef CONFIG_RK_USB_UART
 146 /**
 147  *  dwc_otg_uart_enabled - check if a usb-uart bypass func is enabled in DT
 148  *
 149  *  Returns true if the status property of node "usb_uart" is set to "okay"
 150  *  or "ok", if this property is absent it will use the default status "ok"
 151  *  0 otherwise
 152  */
 153 static bool dwc_otg_uart_enabled(void)
 154 {
 155         struct device_node *np;
 156
 157         np = of_find_node_by_name(NULL, "usb_uart");
 158         if (np && of_device_is_available(np))
 159                 return true;
 160
 161         return false;
 162 }
 163
 164 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 165 {
 166         if ((1 == enter_usb_uart_mode) && dwc_otg_uart_enabled()) {
 167                 /* bypass dm, enter uart mode */
 168                 writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12), RK_GRF_VIRT +
 169                            RK3036_GRF_UOC1_CON4);
 170         } else if (0 == enter_usb_uart_mode) {
 171                 /* enter usb mode */
 172                 writel(UOC_HIWORD_UPDATE(0x0, 0x3, 12), RK_GRF_VIRT +
 173                            RK3036_GRF_UOC1_CON4);
 174         }
 175 }
 176 #else
 177 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 178 {
 179 }
 180 #endif
 181
 182 static void usb20otg_power_enable(int enable)
 183 {
 184         if (0 == enable) {
 185                 rk_battery_charger_detect_cb(USB_OTG_POWER_OFF);
 186                 /* disable otg_drv power */
 187                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 188                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 189         } else if (1 == enable) {
 190                 rk_battery_charger_detect_cb(USB_OTG_POWER_ON);
 191                 /* enable otg_drv power */
 192                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 193                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 194         }
 195 }
 196 static void usb20otg_phy_power_down(int power_down)
 197 {
 198         if (power_down == PHY_POWER_DOWN) {
 199                 if (control_usb->linestate_wakeup) {
 200                         /* enable otg0_linestate irq */
 201                         writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12),
 202                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 203                         /* enable otg1_linestate irq */
 204                         writel(UOC_HIWORD_UPDATE(0x3, 0x3, 14),
 205                                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 206                 }
 207         } else if (power_down == PHY_POWER_UP) {
 208                 ;
 209         }
 210 }
 211 struct dwc_otg_platform_data usb20otg_pdata_rk3036 = {
 212         .phyclk = NULL,
 213         .ahbclk = NULL,
 214         .busclk = NULL,
 215         .phy_status = 0,
 216         .hw_init = usb20otg_hw_init,
 217         .phy_suspend = usb20otg_phy_suspend,
 218         .soft_reset = usb20otg_soft_reset,
 219         .clock_init = usb20otg_clock_init,
 220         .clock_enable = usb20otg_clock_enable,
 221         .get_status = usb20otg_get_status,
 222         .power_enable = usb20otg_power_enable,
 223         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 224         .bc_detect_cb = rk_battery_charger_detect_cb,
 225         .phy_power_down = usb20otg_phy_power_down,
 226 };
 227 #endif
 228
 229 #ifdef CONFIG_USB20_HOST
 230 static void usb20host_hw_init(void)
 231 {
 232         /* other haredware init,include:
 233          * DRV_VBUS GPIO init */
 234         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 235                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 236                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 237         }
 238 }
 239
 240 static void usb20host_phy_suspend(void *pdata, int suspend)
 241 {
 242         struct dwc_otg_platform_data *usbpdata = pdata;
 243
 244         if (suspend) {
 245                 /* enable soft control */
 246                 writel(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0),
 247                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 248                 usbpdata->phy_status = 1;
 249         } else {
 250                 /* exit suspend */
 251                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
 252                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 253                 usbpdata->phy_status = 0;
 254         }
 255 }
 256
 257 static void usb20host_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 258 {
 259         struct dwc_otg_platform_data *usbpdata = pdata;
 260         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 261
 262         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 263         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 264         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 265         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 266                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 267                 return;
 268         }
 269
 270         switch(rst_type) {
 271         case RST_POR:
 272                 /* PHY reset */
 273                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
 274                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 275                 reset_control_assert(rst_host_p);
 276                 udelay(15);
 277                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
 278                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 279
 280                 udelay(1500);
 281                 reset_control_deassert(rst_host_p);
 282
 283                 /* Controller reset */
 284                 reset_control_assert(rst_host_c);
 285                 reset_control_assert(rst_host_h);
 286
 287                 udelay(5);
 288
 289                 reset_control_deassert(rst_host_c);
 290                 reset_control_deassert(rst_host_h);
 291                 break;
 292
 293         default:
 294                 break;
 295         }
 296 }
 297
 298 static void usb20host_clock_init(void *pdata)
 299 {
 300         struct dwc_otg_platform_data *usbpdata = pdata;
 301         struct clk *ahbclk, *phyclk;
 302
 303         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb1");
 304         if (IS_ERR(ahbclk)) {
 305                 dev_err(usbpdata->dev, "Failed to get hclk_usb1\n");
 306                 return;
 307         }
 308
 309         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy1");
 310         if (IS_ERR(phyclk)) {
 311                 dev_err(usbpdata->dev, "Failed to get clk_usbphy1\n");
 312                 return;
 313         }
 314
 315         usbpdata->phyclk = phyclk;
 316         usbpdata->ahbclk = ahbclk;
 317 }
 318
 319 static void usb20host_clock_enable(void *pdata, int enable)
 320 {
 321         struct dwc_otg_platform_data *usbpdata = pdata;
 322
 323         if (enable) {
 324                 clk_prepare_enable(usbpdata->ahbclk);
 325                 clk_prepare_enable(usbpdata->phyclk);
 326         } else {
 327                 clk_disable_unprepare(usbpdata->ahbclk);
 328                 clk_disable_unprepare(usbpdata->phyclk);
 329         }
 330 }
 331
 332 static int usb20host_get_status(int id)
 333 {
 334         int ret = -1;
 335         u32 soc_status0 = readl(RK_GRF_VIRT + RK3036_GRF_SOC_STATUS0);
 336
 337         switch (id) {
 338         case USB_STATUS_BVABLID:
 339                 /* bvalid in grf */
 340                 ret = soc_status0 & (0x1 << 13);
 341                 break;
 342         case USB_STATUS_DPDM:
 343                 /* dpdm in grf */
 344                 ret = soc_status0 & (0x3 << 14);
 345                 break;
 346         case USB_STATUS_ID:
 347                 /* id in grf */
 348                 ret = 0;
 349                 break;
 350         case USB_CHIP_ID:
 351                 ret = control_usb->chip_id;
 352                 break;
 353         case USB_REMOTE_WAKEUP:
 354                 ret = control_usb->remote_wakeup;
 355                 break;
 356         case USB_IRQ_WAKEUP:
 357                 ret = control_usb->usb_irq_wakeup;
 358                 break;
 359         default:
 360                 break;
 361         }
 362         return ret;
 363 }
 364
 365 static void usb20host_power_enable(int enable)
 366 {
 367         if (0 == enable) {
 368                 /* disable host_drv power */
 369                 /* do not disable power in default */
 370         } else if (1 == enable) {
 371                 /* enable host_drv power */
 372                 if (gpio_is_valid(control_usb->host_gpios->gpio))
 373                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 374         }
 375 }
 376
 377 struct dwc_otg_platform_data usb20host_pdata_rk3036 = {
 378         .phyclk = NULL,
 379         .ahbclk = NULL,
 380         .busclk = NULL,
 381         .phy_status = 0,
 382         .hw_init = usb20host_hw_init,
 383         .phy_suspend = usb20host_phy_suspend,
 384         .soft_reset = usb20host_soft_reset,
 385         .clock_init = usb20host_clock_init,
 386         .clock_enable = usb20host_clock_enable,
 387         .get_status = usb20host_get_status,
 388         .power_enable = usb20host_power_enable,
 389 };
 390 #endif
 391
 392 #ifdef CONFIG_OF
 393 static const struct of_device_id rk_usb_control_id_table[] = {
 394         {
 395          .compatible = "rockchip,rk3036-usb-control",
 396          },
 397         {},
 398 };
 399 #endif
 400 /*********************************************************************
 401                         rk3036 usb detections
 402 *********************************************************************/
 403
 404 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 405 static inline void do_wakeup(struct work_struct *work)
 406 {
 407         /* wake up the system */
 408         rk_send_wakeup_key();
 409 }
 410
 411 static void usb_battery_charger_detect_work(struct work_struct *work)
 412 {
 413         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 414 }
 415
 416 /********** handler for bvalid irq **********/
 417 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 418 {
 419         /* clear irq */
 420         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 15),
 421                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 422 #ifdef CONFIG_RK_USB_UART
 423         /* usb otg dp/dm switch to usb phy */
 424         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 425 #endif
 426
 427         if (control_usb->usb_irq_wakeup) {
 428                 wake_lock_timeout(&control_usb->usb_wakelock,
 429                                   WAKE_LOCK_TIMEOUT);
 430                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 431                                       HZ / 10);
 432         }
 433
 434         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 435
 436         return IRQ_HANDLED;
 437 }
 438
 439 /********** Handler for linestate irq **********/
 440 static irqreturn_t otg0_linestate_irq_handler(int irq, void *dev_id)
 441 {
 442         /*
 443          * Here is a chip hwrdware bug, when disable/enable
 444          * linestate irq bit the state machine will not reset
 445          * So here have to add a delay to wait the linestate filter
 446          * timer run out (linestate filter time had been set to 100us)
 447          */
 448         udelay(200);
 449
 450         /* clear and disable irq */
 451         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 12),
 452                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 453
 454
 455         if (control_usb->usb_irq_wakeup) {
 456                 wake_lock_timeout(&control_usb->usb_wakelock,
 457                                   WAKE_LOCK_TIMEOUT);
 458         }
 459
 460         return IRQ_HANDLED;
 461 }
 462
 463 static irqreturn_t otg1_linestate_irq_handler(int irq, void *dev_id)
 464 {
 465         /*
 466          * Here is a chip hwrdware bug, when disable/enable
 467          * linestate irq bit the state machine will not reset
 468          * So here have to add a delay to wait the linestate filter
 469          * timer run out (linestate filter time had been set to 100us)
 470          */
 471         udelay(200);
 472
 473         /* clear and disable irq */
 474         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 14),
 475                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 476
 477
 478         if (control_usb->usb_irq_wakeup) {
 479                 wake_lock_timeout(&control_usb->usb_wakelock,
 480                                   WAKE_LOCK_TIMEOUT);
 481         }
 482
 483         return IRQ_HANDLED;
 484 }
 485 /************* register usb detection irqs **************/
 486 static int otg_irq_detect_init(struct platform_device *pdev)
 487 {
 488         int ret = 0;
 489         int irq = 0;
 490
 491         if (control_usb->usb_irq_wakeup) {
 492                 wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 493                                "usb_detect");
 494                 INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 495         }
 496
 497         /*register otg_bvalid irq */
 498         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 499         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 500                 ret = request_irq(irq, bvalid_irq_handler,
 501                                   0, "otg_bvalid", NULL);
 502                 if (ret < 0) {
 503                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 504                 } else {
 505                         /* enable bvalid irq  */
 506                         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 14),
 507                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 508                 }
 509         }
 510
 511         if (!control_usb->linestate_wakeup)
 512                 return 0;
 513
 514         /* Set otg0&1_linestate_filter time to 100us */
 515         writel(UOC_HIWORD_UPDATE(0x0, 0xf, 6), RK_GRF_VIRT + 0x1a0);
 516
 517         /* Register otg0_linestate irq */
 518         irq = platform_get_irq_byname(pdev, "otg0_linestate");
 519         if (irq > 0) {
 520                 ret = request_irq(irq, otg0_linestate_irq_handler,
 521                                   0, "otg0_linestate", NULL);
 522                 if (ret < 0) {
 523                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 524                 } else {
 525                         /* Clear otg0_linestate irq  */
 526                         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 12),
 527                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 528                 }
 529         }
 530
 531         /* Register otg1_linestate irq */
 532         irq = platform_get_irq_byname(pdev, "otg1_linestate");
 533         if (irq > 0) {
 534                 ret = request_irq(irq, otg1_linestate_irq_handler,
 535                                   0, "otg1_linestate", NULL);
 536                 if (ret < 0) {
 537                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 538                 } else {
 539                         /* Clear otg1_linestate irq  */
 540                         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 14),
 541                                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 542                 }
 543         }
 544         return ret;
 545 }
 546
 547 /********** end of rk3036 usb detections **********/
 548 static int rk_usb_control_probe(struct platform_device *pdev)
 549 {
 550         int gpio, err;
 551         struct device_node *np = pdev->dev.of_node;
 552         int ret = 0;
 553
 554         control_usb =
 555             devm_kzalloc(&pdev->dev, sizeof(*control_usb), GFP_KERNEL);
 556         if (!control_usb) {
 557                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 558                 ret = -ENOMEM;
 559                 goto out;
 560         }
 561
 562         control_usb->chip_id = RK3036_USB_CTLR;
 563         control_usb->remote_wakeup = of_property_read_bool(np,
 564                                                            "rockchip,remote_wakeup");
 565         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 566                                                             "rockchip,usb_irq_wakeup");
 567         control_usb->linestate_wakeup = of_property_read_bool(np,
 568                                                               "rockchip,linestate_wakeup");
 569
 570         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 571                           usb_battery_charger_detect_work);
 572
 573         control_usb->host_gpios =
 574             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 575         if (!control_usb->host_gpios) {
 576                 dev_err(&pdev->dev, "unable to alloc memory for host_gpios\n");
 577                 ret = -ENOMEM;
 578                 goto out;
 579         }
 580
 581         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 582         control_usb->host_gpios->gpio = gpio;
 583
 584         if (!gpio_is_valid(gpio)) {
 585                 dev_err(&pdev->dev, "invalid host gpio%d\n", gpio);
 586         } else {
 587                 err = devm_gpio_request(&pdev->dev, gpio, "host_drv_gpio");
 588                 if (err) {
 589                         dev_err(&pdev->dev,
 590                                 "failed to request GPIO%d for host_drv\n",
 591                                 gpio);
 592                         ret = err;
 593                         goto out;
 594                 }
 595                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 596         }
 597
 598         control_usb->otg_gpios =
 599             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 600         if (!control_usb->otg_gpios) {
 601                 dev_err(&pdev->dev, "unable to alloc memory for otg_gpios\n");
 602                 ret = -ENOMEM;
 603                 goto out;
 604         }
 605
 606         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 607         control_usb->otg_gpios->gpio = gpio;
 608
 609         if (!gpio_is_valid(gpio)) {
 610                 dev_err(&pdev->dev, "invalid otg gpio%d\n", gpio);
 611         } else {
 612                 err = devm_gpio_request(&pdev->dev, gpio, "otg_drv_gpio");
 613                 if (err) {
 614                         dev_err(&pdev->dev,
 615                                 "failed to request GPIO%d for otg_drv\n", gpio);
 616                         ret = err;
 617                         goto out;
 618                 }
 619                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 620         }
 621
 622 out:
 623         return ret;
 624 }
 625
 626 static int rk_usb_control_remove(struct platform_device *pdev)
 627 {
 628         return 0;
 629 }
 630
 631 static struct platform_driver rk_usb_control_driver = {
 632         .probe = rk_usb_control_probe,
 633         .remove = rk_usb_control_remove,
 634         .driver = {
 635                    .name = "rk3036-usb-control",
 636                    .owner = THIS_MODULE,
 637                    .of_match_table = of_match_ptr(rk_usb_control_id_table),
 638                    },
 639 };
 640
 641 #ifdef CONFIG_OF
 642
 643 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 644         {
 645          .compatible = "rockchip,rk3036-dwc-control-usb",
 646          },
 647         {},
 648 };
 649
 650 #endif
 651 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 652 {
 653         struct clk *hclk_usb_peri;
 654         int ret = 0;
 655
 656         if (!control_usb) {
 657                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 658                 ret = -ENOMEM;
 659                 goto err1;
 660         }
 661
 662         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 663         if (IS_ERR(hclk_usb_peri)) {
 664                 dev_err(&pdev->dev, "Failed to get hclk_usb_peri\n");
 665                 ret = -EINVAL;
 666                 goto err1;
 667         }
 668
 669         control_usb->hclk_usb_peri = hclk_usb_peri;
 670         clk_prepare_enable(hclk_usb_peri);
 671
 672 #ifdef CONFIG_USB20_OTG
 673         if (usb20otg_get_status(USB_STATUS_BVABLID))
 674                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 675                                       HZ / 10);
 676 #endif
 677
 678         ret = otg_irq_detect_init(pdev);
 679         if (ret < 0)
 680                 goto err2;
 681
 682         return 0;
 683
 684 err2:
 685         clk_disable_unprepare(hclk_usb_peri);
 686 err1:
 687         return ret;
 688 }
 689
 690 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 691 {
 692         clk_disable_unprepare(control_usb->hclk_usb_peri);
 693         return 0;
 694 }
 695
 696 static struct platform_driver dwc_otg_control_usb_driver = {
 697         .probe = dwc_otg_control_usb_probe,
 698         .remove = dwc_otg_control_usb_remove,
 699         .driver = {
 700                    .name = "rk3036-dwc-control-usb",
 701                    .owner = THIS_MODULE,
 702                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 703                    },
 704 };
 705
 706 static int __init dwc_otg_control_usb_init(void)
 707 {
 708         int retval = 0;
 709
 710         retval |= platform_driver_register(&rk_usb_control_driver);
 711         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 712         return retval;
 713 }
 714
 715 subsys_initcall(dwc_otg_control_usb_init);
 716
 717 static void __exit dwc_otg_control_usb_exit(void)
 718 {
 719         platform_driver_unregister(&rk_usb_control_driver);
 720         platform_driver_unregister(&dwc_otg_control_usb_driver);
 721 }
 722
 723 module_exit(dwc_otg_control_usb_exit);
 724 MODULE_ALIAS("platform: dwc_control_usb");
 725 MODULE_AUTHOR("RockChip Inc.");
 726 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 727 MODULE_LICENSE("GPL v2");
 728 #endif