drivers/usb/dwc_otg_310/usbdev_rk3368.c

   1 #ifdef CONFIG_ARM64
   2 #include "usbdev_rk.h"
   3 #include "dwc_otg_regs.h"
   4
   5 static struct dwc_otg_control_usb *control_usb;
   6
   7 static u32 uoc_read(u32 reg)
   8 {
   9         unsigned int val;
  10
  11         regmap_read(control_usb->grf, reg, &val);
  12         return val;
  13 }
  14
  15 static void uoc_write(u32 value, u32 reg)
  16 {
  17         regmap_write(control_usb->grf, reg, value);
  18 }
  19
  20 #ifdef CONFIG_USB20_OTG
  21 static void usb20otg_hw_init(void)
  22 {
  23         /* Turn off differential receiver in suspend mode */
  24         uoc_write(UOC_HIWORD_UPDATE(0, 1, 2), 0x798);
  25
  26         /* Set disconnect detection trigger point to 625mv */
  27         uoc_write(UOC_HIWORD_UPDATE(0x9, 0xf, 11), 0x79c);
  28
  29         /* other haredware init,include:
  30          * DRV_VBUS GPIO init */
  31         if (gpio_is_valid(control_usb->otg_gpios->gpio))
  32                 gpio_set_value(control_usb->otg_gpios->gpio, 0);
  33 }
  34
  35 static void usb20otg_phy_suspend(void *pdata, int suspend)
  36 {
  37         struct dwc_otg_platform_data *usbpdata = pdata;
  38         if (suspend) {
  39                 /* enable soft control */
  40                 uoc_write(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0), 0x700);
  41                 usbpdata->phy_status = 1;
  42         } else {
  43                 /* exit suspend */
  44                 uoc_write(UOC_HIWORD_UPDATE(0x0, 0x1, 0), 0x700);
  45                 usbpdata->phy_status = 0;
  46         }
  47 }
  48
  49 static void usb20otg_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
  50 {
  51         struct dwc_otg_platform_data *usbpdata = pdata;
  52         struct reset_control *rst_otg_h, *rst_otg_p, *rst_otg_c;
  53
  54         rst_otg_h = devm_reset_control_get(usbpdata->dev, "otg_ahb");
  55         rst_otg_p = devm_reset_control_get(usbpdata->dev, "otg_phy");
  56         rst_otg_c = devm_reset_control_get(usbpdata->dev, "otg_controller");
  57         if (IS_ERR(rst_otg_h) || IS_ERR(rst_otg_p) || IS_ERR(rst_otg_c)) {
  58                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
  59                 return;
  60         }
  61
  62         switch (rst_type) {
  63         case RST_POR:
  64                 /* PHY reset */
  65                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x700);
  66                 reset_control_assert(rst_otg_p);
  67                 udelay(15);
  68                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x700);
  69                 udelay(1500);
  70                 reset_control_deassert(rst_otg_p);
  71                 udelay(2);
  72
  73                 /* Controller reset */
  74                 reset_control_assert(rst_otg_c);
  75                 reset_control_assert(rst_otg_h);
  76
  77                 udelay(2);
  78
  79                 reset_control_deassert(rst_otg_c);
  80                 reset_control_deassert(rst_otg_h);
  81                 break;
  82         case RST_CHN_HALT:
  83                 /* PHY reset */
  84                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x700);
  85                 reset_control_assert(rst_otg_p);
  86                 udelay(15);
  87                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x700);
  88                 udelay(1500);
  89                 reset_control_deassert(rst_otg_p);
  90                 udelay(2);
  91                 break;
  92         default:
  93                 break;
  94         }
  95 }
  96
  97 static void usb20otg_clock_init(void *pdata)
  98 {
  99         struct dwc_otg_platform_data *usbpdata = pdata;
 100         struct clk *ahbclk, *phyclk;
 101
 102         ahbclk = devm_clk_get(usbpdata->dev, "otg");
 103         if (IS_ERR(ahbclk)) {
 104                 dev_err(usbpdata->dev, "Failed to get otg clk\n");
 105                 return;
 106         }
 107
 108         phyclk = devm_clk_get(usbpdata->dev, "sclk_otgphy0");
 109         if (IS_ERR(phyclk)) {
 110                 dev_err(usbpdata->dev, "Failed to get sclk_otgphy0\n");
 111                 return;
 112         }
 113
 114         usbpdata->phyclk = phyclk;
 115         usbpdata->ahbclk = ahbclk;
 116 }
 117
 118 static void usb20otg_clock_enable(void *pdata, int enable)
 119 {
 120         struct dwc_otg_platform_data *usbpdata = pdata;
 121
 122         if (enable) {
 123                 clk_prepare_enable(usbpdata->ahbclk);
 124                 clk_prepare_enable(usbpdata->phyclk);
 125         } else {
 126                 clk_disable_unprepare(usbpdata->ahbclk);
 127                 clk_disable_unprepare(usbpdata->phyclk);
 128         }
 129 }
 130
 131 static int usb20otg_get_status(int id)
 132 {
 133         int ret = -1;
 134         u32 soc_status15 = uoc_read(control_usb->grf_otg_st_offset);
 135
 136         switch (id) {
 137         case USB_STATUS_BVABLID:
 138                 /* bvalid in grf */
 139                 ret = soc_status15 & (0x1 << 23);
 140                 break;
 141         case USB_STATUS_DPDM:
 142                 /* dpdm in grf */
 143                 ret = soc_status15 & (0x3 << 24);
 144                 break;
 145         case USB_STATUS_ID:
 146                 /* id in grf */
 147                 ret = soc_status15 & (0x1 << 26);
 148                 break;
 149         case USB_CHIP_ID:
 150                 ret = control_usb->chip_id;
 151                 break;
 152         case USB_REMOTE_WAKEUP:
 153                 ret = control_usb->remote_wakeup;
 154                 break;
 155         case USB_IRQ_WAKEUP:
 156                 ret = control_usb->usb_irq_wakeup;
 157                 break;
 158         default:
 159                 break;
 160         }
 161         return ret;
 162 }
 163
 164 #ifdef CONFIG_RK_USB_UART
 165 /**
 166  *  dwc_otg_uart_enabled - check if a usb-uart bypass func is enabled in DT
 167  *
 168  *  Returns true if the status property of node "usb_uart" is set to "okay"
 169  *  or "ok", if this property is absent it will use the default status "ok"
 170  *  0 otherwise
 171  */
 172 static bool dwc_otg_uart_enabled(void)
 173 {
 174         return false;
 175 }
 176
 177 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 178 {
 179 }
 180 #else
 181 static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
 182 {
 183 }
 184 #endif
 185
 186 static void usb20otg_power_enable(int enable)
 187 {
 188         if (0 == enable) {
 189                 /* disable otg_drv power */
 190                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 191                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 192
 193                 rk_battery_charger_detect_cb(USB_OTG_POWER_OFF);
 194         } else if (1 == enable) {
 195                 /* enable otg_drv power */
 196                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 197                         gpio_set_value(control_usb->otg_gpios->gpio, 1);
 198
 199                 if (!usb20otg_get_status(USB_STATUS_BVABLID))
 200                         rk_battery_charger_detect_cb(USB_OTG_POWER_ON);
 201         }
 202 }
 203
 204 struct dwc_otg_platform_data usb20otg_pdata_rk3368 = {
 205         .phyclk = NULL,
 206         .ahbclk = NULL,
 207         .busclk = NULL,
 208         .phy_status = 0,
 209         .hw_init = usb20otg_hw_init,
 210         .phy_suspend = usb20otg_phy_suspend,
 211         .soft_reset = usb20otg_soft_reset,
 212         .clock_init = usb20otg_clock_init,
 213         .clock_enable = usb20otg_clock_enable,
 214         .get_status = usb20otg_get_status,
 215         .power_enable = usb20otg_power_enable,
 216         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 217         .bc_detect_cb = rk_battery_charger_detect_cb,
 218 };
 219 #endif
 220
 221 #ifdef CONFIG_USB_EHCI_RK
 222 static void usb20ehci_hw_init(void)
 223 {
 224         /* Turn off differential receiver in suspend mode */
 225         uoc_write(UOC_HIWORD_UPDATE(0, 1, 2), 0x7b8);
 226         /* Set disconnect detection trigger point to 625mv */
 227         uoc_write(UOC_HIWORD_UPDATE(0x9, 0xf, 11), 0x7bc);
 228
 229         /* other haredware init,include:
 230          * DRV_VBUS GPIO init */
 231         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 232                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 233                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 234         }
 235 }
 236
 237 static void usb20ehci_phy_suspend(void *pdata, int suspend)
 238 {
 239         struct rkehci_platform_data *usbpdata = pdata;
 240
 241         if (suspend) {
 242                 /* enable soft control */
 243                 uoc_write(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0), 0x728);
 244                 usbpdata->phy_status = 1;
 245         } else {
 246                 /* exit suspend */
 247                 uoc_write(UOC_HIWORD_UPDATE(0x0, 0x1, 0), 0x728);
 248                 usbpdata->phy_status = 0;
 249         }
 250 }
 251
 252 static void usb20ehci_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 253 {
 254         struct rkehci_platform_data *usbpdata = pdata;
 255         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 256
 257         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 258         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 259         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 260         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 261                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 262                 return;
 263         }
 264
 265         switch (rst_type) {
 266         case RST_POR:
 267                 /* PHY reset */
 268                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x728);
 269                 reset_control_assert(rst_host_p);
 270                 udelay(15);
 271                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x728);
 272
 273                 udelay(1500);
 274                 reset_control_deassert(rst_host_p);
 275
 276                 /* Controller reset */
 277                 reset_control_assert(rst_host_c);
 278                 reset_control_assert(rst_host_h);
 279
 280                 udelay(5);
 281
 282                 reset_control_deassert(rst_host_c);
 283                 reset_control_deassert(rst_host_h);
 284                 break;
 285
 286         default:
 287                 break;
 288         }
 289 }
 290
 291 static void usb20ehci_clock_init(void *pdata)
 292 {
 293 }
 294
 295 static void usb20ehci_clock_enable(void *pdata, int enable)
 296 {
 297 }
 298
 299 static int usb20ehci_get_status(int id)
 300 {
 301         /* For HOST port in rk336x can not get any info from GRF */
 302         return -ENOENT;
 303 }
 304
 305 struct rkehci_platform_data usb20ehci_pdata_rk3368 = {
 306         .phyclk = NULL,
 307         .ahbclk = NULL,
 308         .phy_status = 0,
 309         .hw_init = usb20ehci_hw_init,
 310         .phy_suspend = usb20ehci_phy_suspend,
 311         .soft_reset = usb20ehci_soft_reset,
 312         .clock_init = usb20ehci_clock_init,
 313         .clock_enable = usb20ehci_clock_enable,
 314         .get_status = usb20ehci_get_status,
 315 };
 316 #endif
 317
 318 struct dwc_otg_platform_data usb20ohci_pdata_rk3368;
 319
 320 #ifdef CONFIG_OF
 321 static const struct of_device_id rk_usb_control_id_table[] = {
 322         {
 323          .compatible = "rockchip,rk3368-usb-control",
 324          },
 325         {},
 326 };
 327 #endif
 328 /*********************************************************************
 329                         rk3126 usb detections
 330 *********************************************************************/
 331
 332 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 333 static inline void do_wakeup(struct work_struct *work)
 334 {
 335         /* wake up the system */
 336         rk_send_wakeup_key();
 337 }
 338
 339 static void usb_battery_charger_detect_work(struct work_struct *work)
 340 {
 341         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 342 }
 343
 344 /********** handler for bvalid irq **********/
 345 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 346 {
 347         /* clear irq */
 348         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x6a0);
 349 #ifdef CONFIG_RK_USB_UART
 350         /* usb otg dp/dm switch to usb phy */
 351         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 352 #endif
 353
 354         if (control_usb->usb_irq_wakeup) {
 355                 wake_lock_timeout(&control_usb->usb_wakelock,
 356                                   WAKE_LOCK_TIMEOUT);
 357                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 358                                       HZ / 10);
 359         }
 360
 361         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 362
 363         return IRQ_HANDLED;
 364 }
 365
 366 /************* register usb detection irqs **************/
 367 static int otg_irq_detect_init(struct platform_device *pdev)
 368 {
 369         int ret = 0;
 370         int irq = 0;
 371
 372         wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 373                        "usb_detect");
 374         INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 375
 376         /*register otg_bvalid irq */
 377         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 378         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 379                 ret = request_irq(irq, bvalid_irq_handler,
 380                                   0, "otg_bvalid", NULL);
 381                 if (ret < 0) {
 382                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 383                 } else {
 384                         /* enable bvalid irq  */
 385                         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x680);
 386                 }
 387         }
 388
 389         return 0;
 390 }
 391
 392 /********** end of usb detections **********/
 393 #ifdef CONFIG_OF
 394 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 395         {
 396          .compatible = "rockchip,rk3368-dwc-control-usb",
 397          },
 398         {},
 399 };
 400 #endif
 401 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 402 {
 403         struct device *dev = &pdev->dev;
 404         struct device_node *np = dev->of_node;
 405         struct clk *hclk_usb_peri;
 406         struct regmap *grf;
 407         int gpio, ret = 0;
 408         u32 offset;
 409
 410         control_usb = devm_kzalloc(dev, sizeof(*control_usb), GFP_KERNEL);
 411         if (!control_usb) {
 412                 dev_err(&pdev->dev, "Unable to alloc memory for control usb\n");
 413                 return -ENOMEM;
 414         }
 415
 416         /* Init regmap GRF */
 417         grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
 418         if (IS_ERR(grf)) {
 419                 dev_err(&pdev->dev, "Missing rockchip,grf property\n");
 420                 return PTR_ERR(grf);
 421         }
 422         control_usb->grf = grf;
 423
 424         /* get the reg offset of GRF_SOC_STATUS for USB2.0 OTG */
 425         if (of_property_read_u32(np, "grf-offset", &offset)) {
 426                 dev_err(&pdev->dev, "missing reg property in node %s\n",
 427                         np->name);
 428                 return -EINVAL;
 429         }
 430         control_usb->grf_otg_st_offset = offset;
 431
 432         /* Init Vbus-drv GPIOs */
 433         control_usb->host_gpios =
 434             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 435         if (!control_usb->host_gpios) {
 436                 dev_err(&pdev->dev, "Unable to alloc memory for host_gpios\n");
 437                 return -ENOMEM;
 438         }
 439
 440         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 441         control_usb->host_gpios->gpio = gpio;
 442
 443         if (gpio_is_valid(gpio)) {
 444                 if (devm_gpio_request(&pdev->dev, gpio, "usb_host_drv")) {
 445                         dev_err(&pdev->dev,
 446                                 "Failed to request GPIO%d for host_drv\n",
 447                                 gpio);
 448                         return -EINVAL;
 449                 }
 450                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 451         }
 452
 453         control_usb->otg_gpios =
 454             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 455         if (!control_usb->otg_gpios) {
 456                 dev_err(&pdev->dev, "Unable to alloc memory for otg_gpios\n");
 457                 return -ENOMEM;
 458         }
 459
 460         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 461         control_usb->otg_gpios->gpio = gpio;
 462
 463         if (gpio_is_valid(gpio)) {
 464                 if (devm_gpio_request(&pdev->dev, gpio, "usb_otg_drv")) {
 465                         dev_err(&pdev->dev,
 466                                 "failed to request GPIO%d for otg_drv\n", gpio);
 467                         return -EINVAL;
 468                 }
 469                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 470         }
 471
 472
 473         control_usb->remote_wakeup = of_property_read_bool(np,
 474                                                            "rockchip,remote_wakeup");
 475         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 476                                                             "rockchip,usb_irq_wakeup");
 477
 478         /* Init hclk_usb_peri */
 479         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 480         if (IS_ERR(hclk_usb_peri)) {
 481                 dev_info(&pdev->dev, "no hclk_usb_peri clk specified\n");
 482                 hclk_usb_peri = NULL;
 483         }
 484         control_usb->hclk_usb_peri = hclk_usb_peri;
 485         clk_prepare_enable(hclk_usb_peri);
 486
 487 #ifdef CONFIG_USB20_OTG
 488         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 489                           usb_battery_charger_detect_work);
 490
 491         if (usb20otg_get_status(USB_STATUS_BVABLID))
 492                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 493                                       HZ / 10);
 494 #endif
 495
 496         ret = otg_irq_detect_init(pdev);
 497         if (ret < 0)
 498                 goto err;
 499
 500         return 0;
 501
 502 err:
 503         clk_disable_unprepare(hclk_usb_peri);
 504         return ret;
 505 }
 506
 507 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 508 {
 509         clk_disable_unprepare(control_usb->hclk_usb_peri);
 510         return 0;
 511 }
 512
 513 static struct platform_driver dwc_otg_control_usb_driver = {
 514         .probe = dwc_otg_control_usb_probe,
 515         .remove = dwc_otg_control_usb_remove,
 516         .driver = {
 517                    .name = "rk3368-dwc-control-usb",
 518                    .owner = THIS_MODULE,
 519                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 520                    },
 521 };
 522
 523 static int __init dwc_otg_control_usb_init(void)
 524 {
 525         int retval = 0;
 526
 527         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 528         return retval;
 529 }
 530
 531 subsys_initcall(dwc_otg_control_usb_init);
 532
 533 static void __exit dwc_otg_control_usb_exit(void)
 534 {
 535         platform_driver_unregister(&dwc_otg_control_usb_driver);
 536 }
 537
 538 module_exit(dwc_otg_control_usb_exit);
 539 MODULE_ALIAS("platform: dwc_control_usb");
 540 MODULE_AUTHOR("RockChip Inc.");
 541 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 542 MODULE_LICENSE("GPL v2");
 543 #endif