drivers/usb/dwc_otg_310/usbdev_rk3126.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         if (suspend) {
  21                 /* enable soft control */
  22                 writel(UOC_HIWORD_UPDATE(0x55, 0x7f, 0),
  23                        RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
  24                 usbpdata->phy_status = 1;
  25         } else {
  26                 /* exit suspend */
  27                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
  28                        RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
  29                 usbpdata->phy_status = 0;
  30         }
  31 }
  32
  33 static void usb20otg_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
  34 {
  35         struct dwc_otg_platform_data *usbpdata = pdata;
  36         struct reset_control *rst_otg_h, *rst_otg_p, *rst_otg_c;
  37
  38         rst_otg_h = devm_reset_control_get(usbpdata->dev, "otg_ahb");
  39         rst_otg_p = devm_reset_control_get(usbpdata->dev, "otg_phy");
  40         rst_otg_c = devm_reset_control_get(usbpdata->dev, "otg_controller");
  41         if (IS_ERR(rst_otg_h) || IS_ERR(rst_otg_p) || IS_ERR(rst_otg_c)) {
  42                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
  43                 return;
  44         }
  45
  46         switch(rst_type) {
  47         case RST_POR:
  48                 /* PHY reset */
  49                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
  50                            RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
  51                 reset_control_assert(rst_otg_p);
  52                 udelay(15);
  53                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
  54                            RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
  55                 udelay(1500);
  56                 reset_control_deassert(rst_otg_p);
  57                 udelay(2);
  58
  59                 /* Controller reset */
  60                 reset_control_assert(rst_otg_c);
  61                 reset_control_assert(rst_otg_h);
  62
  63                 udelay(2);
  64
  65                 reset_control_deassert(rst_otg_c);
  66                 reset_control_deassert(rst_otg_h);
  67                 break;
  68
  69         default:
  70                 break;
  71         }
  72 }
  73
  74 static void usb20otg_clock_init(void *pdata)
  75 {
  76         struct dwc_otg_platform_data *usbpdata = pdata;
  77         struct clk *ahbclk, *phyclk;
  78
  79         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb0");
  80         if (IS_ERR(ahbclk)) {
  81                 dev_err(usbpdata->dev, "Failed to get hclk_usb0\n");
  82                 return;
  83         }
  84
  85         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy0");
  86         if (IS_ERR(phyclk)) {
  87                 dev_err(usbpdata->dev, "Failed to get clk_usbphy0\n");
  88                 return;
  89         }
  90
  91         usbpdata->phyclk = phyclk;
  92         usbpdata->ahbclk = ahbclk;
  93 }
  94
  95 static void usb20otg_clock_enable(void *pdata, int enable)
  96 {
  97         struct dwc_otg_platform_data *usbpdata = pdata;
  98
  99         if (enable) {
 100                 clk_prepare_enable(usbpdata->ahbclk);
 101                 clk_prepare_enable(usbpdata->phyclk);
 102         } else {
 103                 clk_disable_unprepare(usbpdata->ahbclk);
 104                 /*
 105                    clk_disable_unprepare(usbpdata->phyclk);
 106                  */
 107         }
 108 }
 109
 110 static int usb20otg_get_status(int id)
 111 {
 112         int ret = -1;
 113         u32 soc_status0 = readl(RK_GRF_VIRT + RK312X_GRF_SOC_STATUS0);
 114         switch (id) {
 115         case USB_STATUS_BVABLID:
 116                 /* bvalid in grf */
 117                 ret = soc_status0 & (0x1 << 5);
 118                 break;
 119         case USB_STATUS_DPDM:
 120                 /* dpdm in grf */
 121                 ret = soc_status0 & (0x3 << 6);
 122                 break;
 123         case USB_STATUS_ID:
 124                 /* id in grf */
 125                 ret = soc_status0 & (0x1 << 8);
 126                 break;
 127         case USB_CHIP_ID:
 128                 ret = control_usb->chip_id;
 129                 break;
 130         case USB_REMOTE_WAKEUP:
 131                 ret = control_usb->remote_wakeup;
 132                 break;
 133         case USB_IRQ_WAKEUP:
 134                 ret = control_usb->usb_irq_wakeup;
 135                 break;
 136         default:
 137                 break;
 138         }
 139         return ret;
 140 }
 141
 142 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 143 {
 144 #ifdef CONFIG_RK_USB_UART
 145         if (1 == enter_usb_uart_mode) {
 146                 /* bypass dm, enter uart mode */
 147                 writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12),
 148                        RK_GRF_VIRT + RK312X_GRF_UOC1_CON4);
 149         } else if (0 == enter_usb_uart_mode) {
 150                 /* enter usb mode */
 151                 writel(UOC_HIWORD_UPDATE(0x0, 0x3, 12),
 152                        RK_GRF_VIRT + RK312X_GRF_UOC1_CON4);
 153         }
 154 #endif
 155 }
 156
 157 static void usb20otg_power_enable(int enable)
 158 {
 159         if (0 == enable) {
 160                 /* disable otg_drv power */
 161                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 162                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 163         } else if (1 == enable) {
 164                 /* enable otg_drv power */
 165                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 166                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 167         }
 168 }
 169
 170 struct dwc_otg_platform_data usb20otg_pdata_rk3126 = {
 171         .phyclk = NULL,
 172         .ahbclk = NULL,
 173         .busclk = NULL,
 174         .phy_status = 0,
 175         .hw_init = usb20otg_hw_init,
 176         .phy_suspend = usb20otg_phy_suspend,
 177         .soft_reset = usb20otg_soft_reset,
 178         .clock_init = usb20otg_clock_init,
 179         .clock_enable = usb20otg_clock_enable,
 180         .get_status = usb20otg_get_status,
 181         .power_enable = usb20otg_power_enable,
 182         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 183         .bc_detect_cb = usb20otg_battery_charger_detect_cb,
 184 };
 185 #endif
 186
 187 #ifdef CONFIG_USB20_HOST
 188 static void usb20host_hw_init(void)
 189 {
 190         writel(UOC_HIWORD_UPDATE(1, 1, 3),
 191                    RK_GRF_VIRT + RK312X_GRF_SOC_CON2);
 192         /* other haredware init,include:
 193          * DRV_VBUS GPIO init */
 194         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 195                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 196                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 197         }
 198 }
 199
 200 static void usb20host_phy_suspend(void *pdata, int suspend)
 201 {
 202         struct dwc_otg_platform_data *usbpdata = pdata;
 203
 204         if (suspend) {
 205                 /* enable soft control */
 206                 writel(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0),
 207                        RK_GRF_VIRT + RK312X_GRF_UOC1_CON5);
 208                 usbpdata->phy_status = 1;
 209         } else {
 210                 /* exit suspend */
 211                 writel(UOC_HIWORD_UPDATE(0x0, 0x1, 0),
 212                        RK_GRF_VIRT + RK312X_GRF_UOC1_CON5);
 213                 usbpdata->phy_status = 0;
 214         }
 215 }
 216
 217 static void usb20host_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 218 {
 219         struct dwc_otg_platform_data *usbpdata = pdata;
 220         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 221
 222         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 223         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 224         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 225         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 226                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 227                 return;
 228         }
 229
 230         switch(rst_type) {
 231         case RST_POR:
 232                 /* PHY reset */
 233                 writel(UOC_HIWORD_UPDATE(0x1, 0x3, 0),
 234                            RK_GRF_VIRT + RK312X_GRF_UOC1_CON5);
 235                 reset_control_assert(rst_host_p);
 236                 udelay(15);
 237                 writel(UOC_HIWORD_UPDATE(0x2, 0x3, 0),
 238                            RK_GRF_VIRT + RK312X_GRF_UOC1_CON5);
 239
 240                 udelay(1500);
 241                 reset_control_deassert(rst_host_p);
 242
 243                 /* Controller reset */
 244                 reset_control_assert(rst_host_c);
 245                 reset_control_assert(rst_host_h);
 246
 247                 udelay(5);
 248
 249                 reset_control_deassert(rst_host_c);
 250                 reset_control_deassert(rst_host_h);
 251                 break;
 252
 253         default:
 254                 break;
 255         }
 256 }
 257
 258 static void usb20host_clock_init(void *pdata)
 259 {
 260         struct dwc_otg_platform_data *usbpdata = pdata;
 261         struct clk *ahbclk, *phyclk;
 262
 263         ahbclk = devm_clk_get(usbpdata->dev, "hclk_usb1");
 264         if (IS_ERR(ahbclk)) {
 265                 dev_err(usbpdata->dev, "Failed to get hclk_usb1\n");
 266                 return;
 267         }
 268
 269         phyclk = devm_clk_get(usbpdata->dev, "clk_usbphy1");
 270         if (IS_ERR(phyclk)) {
 271                 dev_err(usbpdata->dev, "Failed to get clk_usbphy1\n");
 272                 return;
 273         }
 274
 275         usbpdata->phyclk = phyclk;
 276         usbpdata->ahbclk = ahbclk;
 277 }
 278
 279 static void usb20host_clock_enable(void *pdata, int enable)
 280 {
 281         struct dwc_otg_platform_data *usbpdata = pdata;
 282
 283         if (enable) {
 284                 clk_prepare_enable(usbpdata->ahbclk);
 285                 clk_prepare_enable(usbpdata->phyclk);
 286         } else {
 287                 clk_disable_unprepare(usbpdata->ahbclk);
 288                 clk_disable_unprepare(usbpdata->phyclk);
 289         }
 290 }
 291
 292 static int usb20host_get_status(int id)
 293 {
 294         int ret = -1;
 295         u32 soc_status0 = readl(RK_GRF_VIRT + RK312X_GRF_SOC_STATUS0);
 296
 297         switch (id) {
 298         case USB_STATUS_BVABLID:
 299                 /* bvalid in grf */
 300                 ret = soc_status0 & (0x1 << 10);
 301                 break;
 302         case USB_STATUS_DPDM:
 303                 /* dpdm in grf */
 304                 ret = soc_status0 & (0x3 << 11);
 305                 break;
 306         case USB_STATUS_ID:
 307                 /* id in grf */
 308                 ret = 0;
 309                 break;
 310         case USB_CHIP_ID:
 311                 ret = control_usb->chip_id;
 312                 break;
 313         case USB_REMOTE_WAKEUP:
 314                 ret = control_usb->remote_wakeup;
 315                 break;
 316         case USB_IRQ_WAKEUP:
 317                 ret = control_usb->usb_irq_wakeup;
 318                 break;
 319         default:
 320                 break;
 321         }
 322         return ret;
 323 }
 324
 325 static void usb20host_power_enable(int enable)
 326 {
 327         if (0 == enable) {
 328                 /* disable host_drv power */
 329                 /* do not disable power in default */
 330         } else if (1 == enable) {
 331                 /* enable host_drv power */
 332                 if (gpio_is_valid(control_usb->host_gpios->gpio))
 333                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 334         }
 335 }
 336
 337 struct dwc_otg_platform_data usb20host_pdata_rk3126 = {
 338         .phyclk = NULL,
 339         .ahbclk = NULL,
 340         .busclk = NULL,
 341         .phy_status = 0,
 342         .hw_init = usb20host_hw_init,
 343         .phy_suspend = usb20host_phy_suspend,
 344         .soft_reset = usb20host_soft_reset,
 345         .clock_init = usb20host_clock_init,
 346         .clock_enable = usb20host_clock_enable,
 347         .get_status = usb20host_get_status,
 348         .power_enable = usb20host_power_enable,
 349 };
 350 #endif
 351
 352 #ifdef CONFIG_OF
 353 static const struct of_device_id rk_usb_control_id_table[] = {
 354         {
 355          .compatible = "rockchip,rk3126-usb-control",
 356          },
 357         {},
 358 };
 359 #endif
 360 /*********************************************************************
 361                         rk3126 usb detections
 362 *********************************************************************/
 363
 364 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 365 static inline void do_wakeup(struct work_struct *work)
 366 {
 367         /* wake up the system */
 368         rk_send_wakeup_key();
 369 }
 370
 371 static void usb_battery_charger_detect_work(struct work_struct *work)
 372 {
 373         rk_usb_charger_status = usb_battery_charger_detect(0);
 374 }
 375
 376 /********** handler for bvalid irq **********/
 377 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 378 {
 379         /* clear irq */
 380         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 15),
 381                RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
 382 #ifdef CONFIG_RK_USB_UART
 383         /* usb otg dp/dm switch to usb phy */
 384         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 385 #endif
 386
 387         if (control_usb->usb_irq_wakeup) {
 388                 wake_lock_timeout(&control_usb->usb_wakelock,
 389                                   WAKE_LOCK_TIMEOUT);
 390                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 391                                       HZ / 10);
 392         }
 393
 394         rk_usb_charger_status = USB_BC_TYPE_SDP;
 395         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 396
 397         return IRQ_HANDLED;
 398 }
 399
 400 /************* register usb detection irqs **************/
 401 static int otg_irq_detect_init(struct platform_device *pdev)
 402 {
 403         int ret = 0;
 404         int irq = 0;
 405
 406         if (control_usb->usb_irq_wakeup) {
 407                 wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 408                                "usb_detect");
 409                 INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 410         }
 411
 412         /*register otg_bvalid irq */
 413         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 414         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 415                 ret = request_irq(irq, bvalid_irq_handler,
 416                                   0, "otg_bvalid", NULL);
 417                 if (ret < 0) {
 418                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 419                 } else {
 420                         /* enable bvalid irq  */
 421                         writel(UOC_HIWORD_UPDATE(0x1, 0x1, 14),
 422                                RK_GRF_VIRT + RK312X_GRF_UOC0_CON0);
 423                 }
 424         }
 425         return ret;
 426 }
 427
 428 /********** end of rk3126 usb detections **********/
 429 static int rk_usb_control_probe(struct platform_device *pdev)
 430 {
 431         int gpio, err;
 432         struct device_node *np = pdev->dev.of_node;
 433         int ret = 0;
 434
 435         control_usb =
 436             devm_kzalloc(&pdev->dev, sizeof(*control_usb), GFP_KERNEL);
 437         if (!control_usb) {
 438                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 439                 ret = -ENOMEM;
 440                 goto out;
 441         }
 442
 443         control_usb->chip_id = RK3126_USB_CTLR;
 444         control_usb->remote_wakeup = of_property_read_bool(np,
 445                                                            "rockchip,remote_wakeup");
 446         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 447                                                             "rockchip,usb_irq_wakeup");
 448
 449         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 450                           usb_battery_charger_detect_work);
 451
 452         control_usb->host_gpios =
 453             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 454         if (!control_usb->host_gpios) {
 455                 dev_err(&pdev->dev, "unable to alloc memory for host_gpios\n");
 456                 ret = -ENOMEM;
 457                 goto out;
 458         }
 459
 460         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 461         control_usb->host_gpios->gpio = gpio;
 462
 463         if (!gpio_is_valid(gpio)) {
 464                 dev_err(&pdev->dev, "invalid host gpio%d\n", gpio);
 465         } else {
 466                 err = devm_gpio_request(&pdev->dev, gpio, "host_drv_gpio");
 467                 if (err) {
 468                         dev_err(&pdev->dev,
 469                                 "failed to request GPIO%d for host_drv\n",
 470                                 gpio);
 471                         ret = err;
 472                         goto out;
 473                 }
 474                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 475         }
 476
 477         control_usb->otg_gpios =
 478             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 479         if (!control_usb->otg_gpios) {
 480                 dev_err(&pdev->dev, "unable to alloc memory for otg_gpios\n");
 481                 ret = -ENOMEM;
 482                 goto out;
 483         }
 484
 485         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 486         control_usb->otg_gpios->gpio = gpio;
 487
 488         if (!gpio_is_valid(gpio)) {
 489                 dev_err(&pdev->dev, "invalid otg gpio%d\n", gpio);
 490         } else {
 491                 err = devm_gpio_request(&pdev->dev, gpio, "otg_drv_gpio");
 492                 if (err) {
 493                         dev_err(&pdev->dev,
 494                                 "failed to request GPIO%d for otg_drv\n", gpio);
 495                         ret = err;
 496                         goto out;
 497                 }
 498                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 499         }
 500
 501 out:
 502         return ret;
 503 }
 504
 505 static int rk_usb_control_remove(struct platform_device *pdev)
 506 {
 507         return 0;
 508 }
 509
 510 static struct platform_driver rk_usb_control_driver = {
 511         .probe = rk_usb_control_probe,
 512         .remove = rk_usb_control_remove,
 513         .driver = {
 514                    .name = "rk3126-usb-control",
 515                    .owner = THIS_MODULE,
 516                    .of_match_table = of_match_ptr(rk_usb_control_id_table),
 517                    },
 518 };
 519
 520 #ifdef CONFIG_OF
 521
 522 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 523         {
 524          .compatible = "rockchip,rk3126-dwc-control-usb",
 525          },
 526         {},
 527 };
 528
 529 #endif
 530 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 531 {
 532         struct clk *hclk_usb_peri;
 533         int ret = 0;
 534
 535         if (!control_usb) {
 536                 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
 537                 ret = -ENOMEM;
 538                 goto err1;
 539         }
 540
 541         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 542         if (IS_ERR(hclk_usb_peri)) {
 543                 dev_err(&pdev->dev, "Failed to get hclk_usb_peri\n");
 544                 ret = -EINVAL;
 545                 goto err1;
 546         }
 547
 548         control_usb->hclk_usb_peri = hclk_usb_peri;
 549         clk_prepare_enable(hclk_usb_peri);
 550
 551 #ifdef CONFIG_USB20_OTG
 552         if (usb20otg_get_status(USB_STATUS_BVABLID)) {
 553                 rk_usb_charger_status = USB_BC_TYPE_SDP;
 554                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 555                                       HZ / 10);
 556         }
 557 #endif
 558
 559         ret = otg_irq_detect_init(pdev);
 560         if (ret < 0)
 561                 goto err2;
 562
 563         return 0;
 564
 565 err2:
 566         clk_disable_unprepare(hclk_usb_peri);
 567 err1:
 568         return ret;
 569 }
 570
 571 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 572 {
 573         clk_disable_unprepare(control_usb->hclk_usb_peri);
 574         return 0;
 575 }
 576
 577 static struct platform_driver dwc_otg_control_usb_driver = {
 578         .probe = dwc_otg_control_usb_probe,
 579         .remove = dwc_otg_control_usb_remove,
 580         .driver = {
 581                    .name = "rk3126-dwc-control-usb",
 582                    .owner = THIS_MODULE,
 583                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 584                    },
 585 };
 586
 587 static int __init dwc_otg_control_usb_init(void)
 588 {
 589         int retval = 0;
 590
 591         retval |= platform_driver_register(&rk_usb_control_driver);
 592         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 593         return retval;
 594 }
 595
 596 subsys_initcall(dwc_otg_control_usb_init);
 597
 598 static void __exit dwc_otg_control_usb_exit(void)
 599 {
 600         platform_driver_unregister(&rk_usb_control_driver);
 601         platform_driver_unregister(&dwc_otg_control_usb_driver);
 602 }
 603
 604 module_exit(dwc_otg_control_usb_exit);
 605 MODULE_ALIAS("platform: dwc_control_usb");
 606 MODULE_AUTHOR("RockChip Inc.");
 607 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 608 MODULE_LICENSE("GPL v2");
 609