drivers/usb/dwc_otg_310/usbdev_rk3036.c

   1 #include "usbdev_rk.h"
   2 #include "usbdev_grf_regs.h"
   3 #include "dwc_otg_regs.h"
   4 static struct dwc_otg_control_usb *control_usb;
   5
   6 #ifdef CONFIG_USB20_OTG
   7 static void usb20otg_hw_init(void)
   8 {
   9         /* other haredware init,include:
  10          * DRV_VBUS GPIO init */
  11         if (gpio_is_valid(control_usb->otg_gpios->gpio)) {
  12                 if (gpio_get_value(control_usb->otg_gpios->gpio))
  13                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
  14         }
  15 }
  16
  17 static void usb20otg_phy_suspend(void *pdata, int suspend)
  18 {
  19         struct dwc_otg_platform_data *usbpdata = pdata;
  20
  21         if (suspend) {
  22                 /* enable soft control */
  23                 writel(UOC_HIWORD_UPDATE(0x55, 0x7f, 0),
  24                        RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  25                 usbpdata->phy_status = 1;
  26         } else {
  27                 /* exit suspend */
  28                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
  29                        RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  30                 usbpdata->phy_status = 0;
  31         }
  32 }
  33
  34 static void usb20otg_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
  35 {
  36         struct dwc_otg_platform_data *usbpdata = pdata;
  37         struct reset_control *rst_otg_h, *rst_otg_p, *rst_otg_c;
  38
  39         rst_otg_h = devm_reset_control_get(usbpdata->dev, "otg_ahb");
  40         rst_otg_p = devm_reset_control_get(usbpdata->dev, "otg_phy");
  41         rst_otg_c = devm_reset_control_get(usbpdata->dev, "otg_controller");
  42         if (IS_ERR(rst_otg_h) || IS_ERR(rst_otg_p) || IS_ERR(rst_otg_c)) {
  43                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
  44                 return;
  45         }
  46
  47         switch(rst_type) {
  48         case RST_POR:
  49                 /* PHY reset */
  50                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
  51                            RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  52                 reset_control_assert(rst_otg_p);
  53                 udelay(15);
  54                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
  55                            RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
  56                 udelay(1500);
  57                 reset_control_deassert(rst_otg_p);
  58                 udelay(2);
  59
  60                 /* Controller reset */
  61                 reset_control_assert(rst_otg_c);
  62                 reset_control_assert(rst_otg_h);
  63
  64                 udelay(2);
  65
  66                 reset_control_deassert(rst_otg_c);
  67                 reset_control_deassert(rst_otg_h);
  68                 break;
  69
  70         default:
  71                 break;
  72         }
  73 }
  74
  75 static void usb20otg_clock_init(void *pdata)
  76 {
  77         struct dwc_otg_platform_data *usbpdata = pdata;
  78         struct clk *ahbclk, *phyclk;
  79
  80         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb0");
  81         if (IS_ERR(ahbclk)) {
  82                 dev_err(usbpdata->dev, "Failed to get hclk_usb0\n");
  83                 return;
  84         }
  85
  86         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy0");
  87         if (IS_ERR(phyclk)) {
  88                 dev_err(usbpdata->dev, "Failed to get clk_usbphy0\n");
  89                 return;
  90         }
  91
  92         usbpdata->phyclk = phyclk;
  93         usbpdata->ahbclk = ahbclk;
  94 }
  95
  96 static void usb20otg_clock_enable(void *pdata, int enable)
  97 {
  98         struct dwc_otg_platform_data *usbpdata = pdata;
  99
 100         if (enable) {
 101                 clk_prepare_enable(usbpdata->ahbclk);
 102                 clk_prepare_enable(usbpdata->phyclk);
 103         } else {
 104                 clk_disable_unprepare(usbpdata->ahbclk);
 105                 /*
 106                    clk_disable_unprepare(usbpdata->phyclk);
 107                  */
 108         }
 109 }
 110
 111 static int usb20otg_get_status(int id)
 112 {
 113         int ret = -1;
 114         u32 soc_status0 = readl(RK_GRF_VIRT + RK3036_GRF_SOC_STATUS0);
 115
 116         switch (id) {
 117         case USB_STATUS_BVABLID:
 118                 /* bvalid in grf */
 119                 ret = soc_status0 & (0x1 << 8);
 120                 break;
 121         case USB_STATUS_DPDM:
 122                 /* dpdm in grf */
 123                 ret = soc_status0 & (0x3 << 9);
 124                 break;
 125         case USB_STATUS_ID:
 126                 /* id in grf */
 127                 ret = soc_status0 & (0x1 << 11);
 128                 break;
 129         case USB_CHIP_ID:
 130                 ret = control_usb->chip_id;
 131                 break;
 132         case USB_REMOTE_WAKEUP:
 133                 ret = control_usb->remote_wakeup;
 134                 break;
 135         case USB_IRQ_WAKEUP:
 136                 ret = control_usb->usb_irq_wakeup;
 137                 break;
 138         default:
 139                 break;
 140         }
 141         return ret;
 142 }
 143
 144 #ifdef CONFIG_RK_USB_UART
 145 /**
 146  *  dwc_otg_uart_enabled - check if a usb-uart bypass func is enabled in DT
 147  *
 148  *  Returns true if the status property of node "usb_uart" is set to "okay"
 149  *  or "ok", if this property is absent it will use the default status "ok"
 150  *  0 otherwise
 151  */
 152 static bool dwc_otg_uart_enabled(void)
 153 {
 154         struct device_node *np;
 155
 156         np = of_find_node_by_name(NULL, "usb_uart");
 157         if (np && of_device_is_available(np))
 158                 return true;
 159
 160         return false;
 161 }
 162
 163 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 164 {
 165         if ((1 == enter_usb_uart_mode) && dwc_otg_uart_enabled()) {
 166                 /* bypass dm, enter uart mode */
 167                 writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12), RK_GRF_VIRT +
 168                            RK3036_GRF_UOC1_CON4);
 169         } else if (0 == enter_usb_uart_mode) {
 170                 /* enter usb mode */
 171                 writel(UOC_HIWORD_UPDATE(0x0, 0x3, 12), RK_GRF_VIRT +
 172                            RK3036_GRF_UOC1_CON4);
 173         }
 174 }
 175 #else
 176 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 177 {
 178 }
 179 #endif
 180
 181 static void usb20otg_power_enable(int enable)
 182 {
 183         if (0 == enable) {
 184                 /* disable otg_drv power */
 185                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 186                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 187         } else if (1 == enable) {
 188                 /* enable otg_drv power */
 189                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 190                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 191         }
 192 }
 193
 194 struct dwc_otg_platform_data usb20otg_pdata_rk3036 = {
 195         .phyclk = NULL,
 196         .ahbclk = NULL,
 197         .busclk = NULL,
 198         .phy_status = 0,
 199         .hw_init = usb20otg_hw_init,
 200         .phy_suspend = usb20otg_phy_suspend,
 201         .soft_reset = usb20otg_soft_reset,
 202         .clock_init = usb20otg_clock_init,
 203         .clock_enable = usb20otg_clock_enable,
 204         .get_status = usb20otg_get_status,
 205         .power_enable = usb20otg_power_enable,
 206         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 207         .bc_detect_cb = rk_battery_charger_detect_cb,
 208 };
 209 #endif
 210
 211 #ifdef CONFIG_USB20_HOST
 212 static void usb20host_hw_init(void)
 213 {
 214         /* other haredware init,include:
 215          * DRV_VBUS GPIO init */
 216         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 217                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 218                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 219         }
 220 }
 221
 222 static void usb20host_phy_suspend(void *pdata, int suspend)
 223 {
 224         struct dwc_otg_platform_data *usbpdata = pdata;
 225
 226         if (suspend) {
 227                 /* enable soft control */
 228                 writel(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0),
 229                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 230                 usbpdata->phy_status = 1;
 231         } else {
 232                 /* exit suspend */
 233                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
 234                        RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 235                 usbpdata->phy_status = 0;
 236         }
 237 }
 238
 239 static void usb20host_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 240 {
 241         struct dwc_otg_platform_data *usbpdata = pdata;
 242         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 243
 244         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 245         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 246         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 247         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 248                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 249                 return;
 250         }
 251
 252         switch(rst_type) {
 253         case RST_POR:
 254                 /* PHY reset */
 255                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
 256                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 257                 reset_control_assert(rst_host_p);
 258                 udelay(15);
 259                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
 260                            RK_GRF_VIRT + RK3036_GRF_UOC1_CON5);
 261
 262                 udelay(1500);
 263                 reset_control_deassert(rst_host_p);
 264
 265                 /* Controller reset */
 266                 reset_control_assert(rst_host_c);
 267                 reset_control_assert(rst_host_h);
 268
 269                 udelay(5);
 270
 271                 reset_control_deassert(rst_host_c);
 272                 reset_control_deassert(rst_host_h);
 273                 break;
 274
 275         default:
 276                 break;
 277         }
 278 }
 279
 280 static void usb20host_clock_init(void *pdata)
 281 {
 282         struct dwc_otg_platform_data *usbpdata = pdata;
 283         struct clk *ahbclk, *phyclk;
 284
 285         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb1");
 286         if (IS_ERR(ahbclk)) {
 287                 dev_err(usbpdata->dev, "Failed to get hclk_usb1\n");
 288                 return;
 289         }
 290
 291         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy1");
 292         if (IS_ERR(phyclk)) {
 293                 dev_err(usbpdata->dev, "Failed to get clk_usbphy1\n");
 294                 return;
 295         }
 296
 297         usbpdata->phyclk = phyclk;
 298         usbpdata->ahbclk = ahbclk;
 299 }
 300
 301 static void usb20host_clock_enable(void *pdata, int enable)
 302 {
 303         struct dwc_otg_platform_data *usbpdata = pdata;
 304
 305         if (enable) {
 306                 clk_prepare_enable(usbpdata->ahbclk);
 307                 clk_prepare_enable(usbpdata->phyclk);
 308         } else {
 309                 clk_disable_unprepare(usbpdata->ahbclk);
 310                 clk_disable_unprepare(usbpdata->phyclk);
 311         }
 312 }
 313
 314 static int usb20host_get_status(int id)
 315 {
 316         int ret = -1;
 317         u32 soc_status0 = readl(RK_GRF_VIRT + RK3036_GRF_SOC_STATUS0);
 318
 319         switch (id) {
 320         case USB_STATUS_BVABLID:
 321                 /* bvalid in grf */
 322                 ret = soc_status0 & (0x1 << 13);
 323                 break;
 324         case USB_STATUS_DPDM:
 325                 /* dpdm in grf */
 326                 ret = soc_status0 & (0x3 << 14);
 327                 break;
 328         case USB_STATUS_ID:
 329                 /* id in grf */
 330                 ret = 0;
 331                 break;
 332         case USB_CHIP_ID:
 333                 ret = control_usb->chip_id;
 334                 break;
 335         case USB_REMOTE_WAKEUP:
 336                 ret = control_usb->remote_wakeup;
 337                 break;
 338         case USB_IRQ_WAKEUP:
 339                 ret = control_usb->usb_irq_wakeup;
 340                 break;
 341         default:
 342                 break;
 343         }
 344         return ret;
 345 }
 346
 347 static void usb20host_power_enable(int enable)
 348 {
 349         if (0 == enable) {
 350                 /* disable host_drv power */
 351                 /* do not disable power in default */
 352         } else if (1 == enable) {
 353                 /* enable host_drv power */
 354                 if (gpio_is_valid(control_usb->host_gpios->gpio))
 355                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 356         }
 357 }
 358
 359 struct dwc_otg_platform_data usb20host_pdata_rk3036 = {
 360         .phyclk = NULL,
 361         .ahbclk = NULL,
 362         .busclk = NULL,
 363         .phy_status = 0,
 364         .hw_init = usb20host_hw_init,
 365         .phy_suspend = usb20host_phy_suspend,
 366         .soft_reset = usb20host_soft_reset,
 367         .clock_init = usb20host_clock_init,
 368         .clock_enable = usb20host_clock_enable,
 369         .get_status = usb20host_get_status,
 370         .power_enable = usb20host_power_enable,
 371 };
 372 #endif
 373
 374 #ifdef CONFIG_OF
 375 static const struct of_device_id rk_usb_control_id_table[] = {
 376         {
 377          .compatible = "rockchip,rk3036-usb-control",
 378          },
 379         {},
 380 };
 381 #endif
 382 /*********************************************************************
 383                         rk3036 usb detections
 384 *********************************************************************/
 385
 386 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 387 static inline void do_wakeup(struct work_struct *work)
 388 {
 389         /* wake up the system */
 390         rk_send_wakeup_key();
 391 }
 392
 393 static void usb_battery_charger_detect_work(struct work_struct *work)
 394 {
 395         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 396 }
 397
 398 /********** handler for bvalid irq **********/
 399 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 400 {
 401         /* clear irq */
 402         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 15),
 403                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 404 #ifdef CONFIG_RK_USB_UART
 405         /* usb otg dp/dm switch to usb phy */
 406         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 407 #endif
 408
 409         if (control_usb->usb_irq_wakeup) {
 410                 wake_lock_timeout(&control_usb->usb_wakelock,
 411                                   WAKE_LOCK_TIMEOUT);
 412                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 413                                       HZ / 10);
 414         }
 415
 416         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 417
 418         return IRQ_HANDLED;
 419 }
 420
 421 /************* register usb detection irqs **************/
 422 static int otg_irq_detect_init(struct platform_device *pdev)
 423 {
 424         int ret = 0;
 425         int irq = 0;
 426
 427         if (control_usb->usb_irq_wakeup) {
 428                 wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 429                                "usb_detect");
 430                 INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 431         }
 432
 433         /*register otg_bvalid irq */
 434         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 435         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 436                 ret = request_irq(irq, bvalid_irq_handler,
 437                                   0, "otg_bvalid", NULL);
 438                 if (ret < 0) {
 439                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 440                 } else {
 441                         /* enable bvalid irq  */
 442                         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 14),
 443                                RK_GRF_VIRT + RK3036_GRF_UOC0_CON5);
 444                 }
 445         }
 446         return ret;
 447 }
 448
 449 /********** end of rk3036 usb detections **********/
 450 static int rk_usb_control_probe(struct platform_device *pdev)
 451 {
 452         int gpio, err;
 453         struct device_node *np = pdev->dev.of_node;
 454         int ret = 0;
 455
 456         control_usb =
 457             devm_kzalloc(&pdev->dev, sizeof(*control_usb), GFP_KERNEL);
 458         if (!control_usb) {
 459                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 460                 ret = -ENOMEM;
 461                 goto out;
 462         }
 463
 464         control_usb->chip_id = RK3036_USB_CTLR;
 465         control_usb->remote_wakeup = of_property_read_bool(np,
 466                                                            "rockchip,remote_wakeup");
 467         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 468                                                             "rockchip,usb_irq_wakeup");
 469
 470         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 471                           usb_battery_charger_detect_work);
 472
 473         control_usb->host_gpios =
 474             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 475         if (!control_usb->host_gpios) {
 476                 dev_err(&pdev->dev, "unable to alloc memory for host_gpios\n");
 477                 ret = -ENOMEM;
 478                 goto out;
 479         }
 480
 481         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 482         control_usb->host_gpios->gpio = gpio;
 483
 484         if (!gpio_is_valid(gpio)) {
 485                 dev_err(&pdev->dev, "invalid host gpio%d\n", gpio);
 486         } else {
 487                 err = devm_gpio_request(&pdev->dev, gpio, "host_drv_gpio");
 488                 if (err) {
 489                         dev_err(&pdev->dev,
 490                                 "failed to request GPIO%d for host_drv\n",
 491                                 gpio);
 492                         ret = err;
 493                         goto out;
 494                 }
 495                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 496         }
 497
 498         control_usb->otg_gpios =
 499             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 500         if (!control_usb->otg_gpios) {
 501                 dev_err(&pdev->dev, "unable to alloc memory for otg_gpios\n");
 502                 ret = -ENOMEM;
 503                 goto out;
 504         }
 505
 506         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 507         control_usb->otg_gpios->gpio = gpio;
 508
 509         if (!gpio_is_valid(gpio)) {
 510                 dev_err(&pdev->dev, "invalid otg gpio%d\n", gpio);
 511         } else {
 512                 err = devm_gpio_request(&pdev->dev, gpio, "otg_drv_gpio");
 513                 if (err) {
 514                         dev_err(&pdev->dev,
 515                                 "failed to request GPIO%d for otg_drv\n", gpio);
 516                         ret = err;
 517                         goto out;
 518                 }
 519                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 520         }
 521
 522 out:
 523         return ret;
 524 }
 525
 526 static int rk_usb_control_remove(struct platform_device *pdev)
 527 {
 528         return 0;
 529 }
 530
 531 static struct platform_driver rk_usb_control_driver = {
 532         .probe = rk_usb_control_probe,
 533         .remove = rk_usb_control_remove,
 534         .driver = {
 535                    .name = "rk3036-usb-control",
 536                    .owner = THIS_MODULE,
 537                    .of_match_table = of_match_ptr(rk_usb_control_id_table),
 538                    },
 539 };
 540
 541 #ifdef CONFIG_OF
 542
 543 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 544         {
 545          .compatible = "rockchip,rk3036-dwc-control-usb",
 546          },
 547         {},
 548 };
 549
 550 #endif
 551 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 552 {
 553         struct clk *hclk_usb_peri;
 554         int ret = 0;
 555
 556         if (!control_usb) {
 557                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 558                 ret = -ENOMEM;
 559                 goto err1;
 560         }
 561
 562         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 563         if (IS_ERR(hclk_usb_peri)) {
 564                 dev_err(&pdev->dev, "Failed to get hclk_usb_peri\n");
 565                 ret = -EINVAL;
 566                 goto err1;
 567         }
 568
 569         control_usb->hclk_usb_peri = hclk_usb_peri;
 570         clk_prepare_enable(hclk_usb_peri);
 571
 572 #ifdef CONFIG_USB20_OTG
 573         if (usb20otg_get_status(USB_STATUS_BVABLID))
 574                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 575                                       HZ / 10);
 576 #endif
 577
 578         ret = otg_irq_detect_init(pdev);
 579         if (ret < 0)
 580                 goto err2;
 581
 582         return 0;
 583
 584 err2:
 585         clk_disable_unprepare(hclk_usb_peri);
 586 err1:
 587         return ret;
 588 }
 589
 590 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 591 {
 592         clk_disable_unprepare(control_usb->hclk_usb_peri);
 593         return 0;
 594 }
 595
 596 static struct platform_driver dwc_otg_control_usb_driver = {
 597         .probe = dwc_otg_control_usb_probe,
 598         .remove = dwc_otg_control_usb_remove,
 599         .driver = {
 600                    .name = "rk3036-dwc-control-usb",
 601                    .owner = THIS_MODULE,
 602                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 603                    },
 604 };
 605
 606 static int __init dwc_otg_control_usb_init(void)
 607 {
 608         int retval = 0;
 609
 610         retval |= platform_driver_register(&rk_usb_control_driver);
 611         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 612         return retval;
 613 }
 614
 615 subsys_initcall(dwc_otg_control_usb_init);
 616
 617 static void __exit dwc_otg_control_usb_exit(void)
 618 {
 619         platform_driver_unregister(&rk_usb_control_driver);
 620         platform_driver_unregister(&dwc_otg_control_usb_driver);
 621 }
 622
 623 module_exit(dwc_otg_control_usb_exit);
 624 MODULE_ALIAS("platform: dwc_control_usb");
 625 MODULE_AUTHOR("RockChip Inc.");
 626 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 627 MODULE_LICENSE("GPL v2");