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                 /* disable otg_drv power */
 186                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 187                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 188         } else if (1 == enable) {
 189                 /* enable otg_drv power */
 190                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 191                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 192         }
 193 }
 194 static void usb20otg_phy_power_down(int power_down)
 195 {
 196         if (power_down == PHY_POWER_DOWN) {
 197                 if (control_usb->linestate_wakeup) {
 198                         /* enable otg0_linestate irq */
 199                         writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12),
 200                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 201                         /* enable otg1_linestate irq */
 202                         writel(UOC_HIWORD_UPDATE(0x3, 0x3, 14),
 203                                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 204                 }
 205         } else if (power_down == PHY_POWER_UP) {
 206                 ;
 207         }
 208 }
 209 struct dwc_otg_platform_data usb20otg_pdata_rk3036 = {
 210         .phyclk = NULL,
 211         .ahbclk = NULL,
 212         .busclk = NULL,
 213         .phy_status = 0,
 214         .hw_init = usb20otg_hw_init,
 215         .phy_suspend = usb20otg_phy_suspend,
 216         .soft_reset = usb20otg_soft_reset,
 217         .clock_init = usb20otg_clock_init,
 218         .clock_enable = usb20otg_clock_enable,
 219         .get_status = usb20otg_get_status,
 220         .power_enable = usb20otg_power_enable,
 221         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 222         .bc_detect_cb = rk_battery_charger_detect_cb,
 223         .phy_power_down = usb20otg_phy_power_down,
 224 };
 225 #endif
 226
 227 #ifdef CONFIG_USB20_HOST
 228 static void usb20host_hw_init(void)
 229 {
 230         /* other haredware init,include:
 231          * DRV_VBUS GPIO init */
 232         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 233                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 234                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 235         }
 236 }
 237
 238 static void usb20host_phy_suspend(void *pdata, int suspend)
 239 {
 240         struct dwc_otg_platform_data *usbpdata = pdata;
 241
 242         if (suspend) {
 243                 /* enable soft control */
 244                 writel(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0),
 245                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 246                 usbpdata->phy_status = 1;
 247         } else {
 248                 /* exit suspend */
 249                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
 250                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 251                 usbpdata->phy_status = 0;
 252         }
 253 }
 254
 255 static void usb20host_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 256 {
 257         struct dwc_otg_platform_data *usbpdata = pdata;
 258         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 259
 260         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 261         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 262         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 263         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 264                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 265                 return;
 266         }
 267
 268         switch(rst_type) {
 269         case RST_POR:
 270                 /* PHY reset */
 271                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
 272                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 273                 reset_control_assert(rst_host_p);
 274                 udelay(15);
 275                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
 276                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 277
 278                 udelay(1500);
 279                 reset_control_deassert(rst_host_p);
 280
 281                 /* Controller reset */
 282                 reset_control_assert(rst_host_c);
 283                 reset_control_assert(rst_host_h);
 284
 285                 udelay(5);
 286
 287                 reset_control_deassert(rst_host_c);
 288                 reset_control_deassert(rst_host_h);
 289                 break;
 290
 291         default:
 292                 break;
 293         }
 294 }
 295
 296 static void usb20host_clock_init(void *pdata)
 297 {
 298         struct dwc_otg_platform_data *usbpdata = pdata;
 299         struct clk *ahbclk, *phyclk;
 300
 301         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb1");
 302         if (IS_ERR(ahbclk)) {
 303                 dev_err(usbpdata->dev, "Failed to get hclk_usb1\n");
 304                 return;
 305         }
 306
 307         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy1");
 308         if (IS_ERR(phyclk)) {
 309                 dev_err(usbpdata->dev, "Failed to get clk_usbphy1\n");
 310                 return;
 311         }
 312
 313         usbpdata->phyclk = phyclk;
 314         usbpdata->ahbclk = ahbclk;
 315 }
 316
 317 static void usb20host_clock_enable(void *pdata, int enable)
 318 {
 319         struct dwc_otg_platform_data *usbpdata = pdata;
 320
 321         if (enable) {
 322                 clk_prepare_enable(usbpdata->ahbclk);
 323                 clk_prepare_enable(usbpdata->phyclk);
 324         } else {
 325                 clk_disable_unprepare(usbpdata->ahbclk);
 326                 clk_disable_unprepare(usbpdata->phyclk);
 327         }
 328 }
 329
 330 static int usb20host_get_status(int id)
 331 {
 332         int ret = -1;
 333         u32 soc_status0 = readl(RK_GRF_VIRT + RK3036_GRF_SOC_STATUS0);
 334
 335         switch (id) {
 336         case USB_STATUS_BVABLID:
 337                 /* bvalid in grf */
 338                 ret = soc_status0 & (0x1 << 13);
 339                 break;
 340         case USB_STATUS_DPDM:
 341                 /* dpdm in grf */
 342                 ret = soc_status0 & (0x3 << 14);
 343                 break;
 344         case USB_STATUS_ID:
 345                 /* id in grf */
 346                 ret = 0;
 347                 break;
 348         case USB_CHIP_ID:
 349                 ret = control_usb->chip_id;
 350                 break;
 351         case USB_REMOTE_WAKEUP:
 352                 ret = control_usb->remote_wakeup;
 353                 break;
 354         case USB_IRQ_WAKEUP:
 355                 ret = control_usb->usb_irq_wakeup;
 356                 break;
 357         default:
 358                 break;
 359         }
 360         return ret;
 361 }
 362
 363 static void usb20host_power_enable(int enable)
 364 {
 365         if (0 == enable) {
 366                 /* disable host_drv power */
 367                 /* do not disable power in default */
 368         } else if (1 == enable) {
 369                 /* enable host_drv power */
 370                 if (gpio_is_valid(control_usb->host_gpios->gpio))
 371                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 372         }
 373 }
 374
 375 struct dwc_otg_platform_data usb20host_pdata_rk3036 = {
 376         .phyclk = NULL,
 377         .ahbclk = NULL,
 378         .busclk = NULL,
 379         .phy_status = 0,
 380         .hw_init = usb20host_hw_init,
 381         .phy_suspend = usb20host_phy_suspend,
 382         .soft_reset = usb20host_soft_reset,
 383         .clock_init = usb20host_clock_init,
 384         .clock_enable = usb20host_clock_enable,
 385         .get_status = usb20host_get_status,
 386         .power_enable = usb20host_power_enable,
 387 };
 388 #endif
 389
 390 #ifdef CONFIG_OF
 391 static const struct of_device_id rk_usb_control_id_table[] = {
 392         {
 393          .compatible = "rockchip,rk3036-usb-control",
 394          },
 395         {},
 396 };
 397 #endif
 398 /*********************************************************************
 399                         rk3036 usb detections
 400 *********************************************************************/
 401
 402 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 403 static inline void do_wakeup(struct work_struct *work)
 404 {
 405         /* wake up the system */
 406         rk_send_wakeup_key();
 407 }
 408
 409 static void usb_battery_charger_detect_work(struct work_struct *work)
 410 {
 411         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 412 }
 413
 414 /********** handler for bvalid irq **********/
 415 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 416 {
 417         /* clear irq */
 418         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 15),
 419                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 420 #ifdef CONFIG_RK_USB_UART
 421         /* usb otg dp/dm switch to usb phy */
 422         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 423 #endif
 424
 425         if (control_usb->usb_irq_wakeup) {
 426                 wake_lock_timeout(&control_usb->usb_wakelock,
 427                                   WAKE_LOCK_TIMEOUT);
 428                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 429                                       HZ / 10);
 430         }
 431
 432         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 433
 434         return IRQ_HANDLED;
 435 }
 436
 437 /********** Handler for linestate irq **********/
 438 static irqreturn_t otg0_linestate_irq_handler(int irq, void *dev_id)
 439 {
 440         /*
 441          * Here is a chip hwrdware bug, when disable/enable
 442          * linestate irq bit the state machine will not reset
 443          * So here have to add a delay to wait the linestate filter
 444          * timer run out (linestate filter time had been set to 100us)
 445          */
 446         udelay(200);
 447
 448         /* clear and disable irq */
 449         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 12),
 450                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 451
 452
 453         if (control_usb->usb_irq_wakeup) {
 454                 wake_lock_timeout(&control_usb->usb_wakelock,
 455                                   WAKE_LOCK_TIMEOUT);
 456         }
 457
 458         return IRQ_HANDLED;
 459 }
 460
 461 static irqreturn_t otg1_linestate_irq_handler(int irq, void *dev_id)
 462 {
 463         /*
 464          * Here is a chip hwrdware bug, when disable/enable
 465          * linestate irq bit the state machine will not reset
 466          * So here have to add a delay to wait the linestate filter
 467          * timer run out (linestate filter time had been set to 100us)
 468          */
 469         udelay(200);
 470
 471         /* clear and disable irq */
 472         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 14),
 473                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 474
 475
 476         if (control_usb->usb_irq_wakeup) {
 477                 wake_lock_timeout(&control_usb->usb_wakelock,
 478                                   WAKE_LOCK_TIMEOUT);
 479         }
 480
 481         return IRQ_HANDLED;
 482 }
 483 /************* register usb detection irqs **************/
 484 static int otg_irq_detect_init(struct platform_device *pdev)
 485 {
 486         int ret = 0;
 487         int irq = 0;
 488
 489         if (control_usb->usb_irq_wakeup) {
 490                 wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 491                                "usb_detect");
 492                 INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 493         }
 494
 495         /*register otg_bvalid irq */
 496         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 497         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 498                 ret = request_irq(irq, bvalid_irq_handler,
 499                                   0, "otg_bvalid", NULL);
 500                 if (ret < 0) {
 501                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 502                 } else {
 503                         /* enable bvalid irq  */
 504                         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 14),
 505                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 506                 }
 507         }
 508
 509         if (!control_usb->linestate_wakeup)
 510                 return 0;
 511
 512         /* Set otg0&1_linestate_filter time to 100us */
 513         writel(UOC_HIWORD_UPDATE(0x0, 0xf, 6), RK_GRF_VIRT + 0x1a0);
 514
 515         /* Register otg0_linestate irq */
 516         irq = platform_get_irq_byname(pdev, "otg0_linestate");
 517         if (irq > 0) {
 518                 ret = request_irq(irq, otg0_linestate_irq_handler,
 519                                   0, "otg0_linestate", NULL);
 520                 if (ret < 0) {
 521                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 522                 } else {
 523                         /* Clear otg0_linestate irq  */
 524                         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 12),
 525                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 526                 }
 527         }
 528
 529         /* Register otg1_linestate irq */
 530         irq = platform_get_irq_byname(pdev, "otg1_linestate");
 531         if (irq > 0) {
 532                 ret = request_irq(irq, otg1_linestate_irq_handler,
 533                                   0, "otg1_linestate", NULL);
 534                 if (ret < 0) {
 535                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 536                 } else {
 537                         /* Clear otg1_linestate irq  */
 538                         writel(UOC_HIWORD_UPDATE(0x2, 0x3, 14),
 539                                RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 540                 }
 541         }
 542         return ret;
 543 }
 544
 545 /********** end of rk3036 usb detections **********/
 546 static int rk_usb_control_probe(struct platform_device *pdev)
 547 {
 548         int gpio, err;
 549         struct device_node *np = pdev->dev.of_node;
 550         int ret = 0;
 551
 552         control_usb =
 553             devm_kzalloc(&pdev->dev, sizeof(*control_usb), GFP_KERNEL);
 554         if (!control_usb) {
 555                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 556                 ret = -ENOMEM;
 557                 goto out;
 558         }
 559
 560         control_usb->chip_id = RK3036_USB_CTLR;
 561         control_usb->remote_wakeup = of_property_read_bool(np,
 562                                                            "rockchip,remote_wakeup");
 563         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 564                                                             "rockchip,usb_irq_wakeup");
 565         control_usb->linestate_wakeup = of_property_read_bool(np,
 566                                                               "rockchip,linestate_wakeup");
 567
 568         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 569                           usb_battery_charger_detect_work);
 570
 571         control_usb->host_gpios =
 572             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 573         if (!control_usb->host_gpios) {
 574                 dev_err(&pdev->dev, "unable to alloc memory for host_gpios\n");
 575                 ret = -ENOMEM;
 576                 goto out;
 577         }
 578
 579         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 580         control_usb->host_gpios->gpio = gpio;
 581
 582         if (!gpio_is_valid(gpio)) {
 583                 dev_err(&pdev->dev, "invalid host gpio%d\n", gpio);
 584         } else {
 585                 err = devm_gpio_request(&pdev->dev, gpio, "host_drv_gpio");
 586                 if (err) {
 587                         dev_err(&pdev->dev,
 588                                 "failed to request GPIO%d for host_drv\n",
 589                                 gpio);
 590                         ret = err;
 591                         goto out;
 592                 }
 593                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 594         }
 595
 596         control_usb->otg_gpios =
 597             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 598         if (!control_usb->otg_gpios) {
 599                 dev_err(&pdev->dev, "unable to alloc memory for otg_gpios\n");
 600                 ret = -ENOMEM;
 601                 goto out;
 602         }
 603
 604         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 605         control_usb->otg_gpios->gpio = gpio;
 606
 607         if (!gpio_is_valid(gpio)) {
 608                 dev_err(&pdev->dev, "invalid otg gpio%d\n", gpio);
 609         } else {
 610                 err = devm_gpio_request(&pdev->dev, gpio, "otg_drv_gpio");
 611                 if (err) {
 612                         dev_err(&pdev->dev,
 613                                 "failed to request GPIO%d for otg_drv\n", gpio);
 614                         ret = err;
 615                         goto out;
 616                 }
 617                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 618         }
 619
 620 out:
 621         return ret;
 622 }
 623
 624 static int rk_usb_control_remove(struct platform_device *pdev)
 625 {
 626         return 0;
 627 }
 628
 629 static struct platform_driver rk_usb_control_driver = {
 630         .probe = rk_usb_control_probe,
 631         .remove = rk_usb_control_remove,
 632         .driver = {
 633                    .name = "rk3036-usb-control",
 634                    .owner = THIS_MODULE,
 635                    .of_match_table = of_match_ptr(rk_usb_control_id_table),
 636                    },
 637 };
 638
 639 #ifdef CONFIG_OF
 640
 641 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 642         {
 643          .compatible = "rockchip,rk3036-dwc-control-usb",
 644          },
 645         {},
 646 };
 647
 648 #endif
 649 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 650 {
 651         struct clk *hclk_usb_peri;
 652         int ret = 0;
 653
 654         if (!control_usb) {
 655                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 656                 ret = -ENOMEM;
 657                 goto err1;
 658         }
 659
 660         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 661         if (IS_ERR(hclk_usb_peri)) {
 662                 dev_err(&pdev->dev, "Failed to get hclk_usb_peri\n");
 663                 ret = -EINVAL;
 664                 goto err1;
 665         }
 666
 667         control_usb->hclk_usb_peri = hclk_usb_peri;
 668         clk_prepare_enable(hclk_usb_peri);
 669
 670 #ifdef CONFIG_USB20_OTG
 671         if (usb20otg_get_status(USB_STATUS_BVABLID))
 672                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 673                                       HZ / 10);
 674 #endif
 675
 676         ret = otg_irq_detect_init(pdev);
 677         if (ret < 0)
 678                 goto err2;
 679
 680         return 0;
 681
 682 err2:
 683         clk_disable_unprepare(hclk_usb_peri);
 684 err1:
 685         return ret;
 686 }
 687
 688 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 689 {
 690         clk_disable_unprepare(control_usb->hclk_usb_peri);
 691         return 0;
 692 }
 693
 694 static struct platform_driver dwc_otg_control_usb_driver = {
 695         .probe = dwc_otg_control_usb_probe,
 696         .remove = dwc_otg_control_usb_remove,
 697         .driver = {
 698                    .name = "rk3036-dwc-control-usb",
 699                    .owner = THIS_MODULE,
 700                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 701                    },
 702 };
 703
 704 static int __init dwc_otg_control_usb_init(void)
 705 {
 706         int retval = 0;
 707
 708         retval |= platform_driver_register(&rk_usb_control_driver);
 709         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 710         return retval;
 711 }
 712
 713 subsys_initcall(dwc_otg_control_usb_init);
 714
 715 static void __exit dwc_otg_control_usb_exit(void)
 716 {
 717         platform_driver_unregister(&rk_usb_control_driver);
 718         platform_driver_unregister(&dwc_otg_control_usb_driver);
 719 }
 720
 721 module_exit(dwc_otg_control_usb_exit);
 722 MODULE_ALIAS("platform: dwc_control_usb");
 723 MODULE_AUTHOR("RockChip Inc.");
 724 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 725 MODULE_LICENSE("GPL v2");
 726 #endif