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                 rk_battery_charger_detect_cb(USB_OTG_POWER_OFF);
 190                 /* disable otg_drv power */
 191                 if (gpio_is_valid(control_usb->otg_gpios->gpio))
 192                         gpio_set_value(control_usb->otg_gpios->gpio, 0);
 193         } else if (1 == enable) {
 194                 rk_battery_charger_detect_cb(USB_OTG_POWER_ON);
 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 }
 200
 201 struct dwc_otg_platform_data usb20otg_pdata_rk3368 = {
 202         .phyclk = NULL,
 203         .ahbclk = NULL,
 204         .busclk = NULL,
 205         .phy_status = 0,
 206         .hw_init = usb20otg_hw_init,
 207         .phy_suspend = usb20otg_phy_suspend,
 208         .soft_reset = usb20otg_soft_reset,
 209         .clock_init = usb20otg_clock_init,
 210         .clock_enable = usb20otg_clock_enable,
 211         .get_status = usb20otg_get_status,
 212         .power_enable = usb20otg_power_enable,
 213         .dwc_otg_uart_mode = dwc_otg_uart_mode,
 214         .bc_detect_cb = rk_battery_charger_detect_cb,
 215 };
 216 #endif
 217
 218 #ifdef CONFIG_USB_EHCI_RK
 219 static void usb20ehci_hw_init(void)
 220 {
 221         /* Turn off differential receiver in suspend mode */
 222         uoc_write(UOC_HIWORD_UPDATE(0, 1, 2), 0x7b8);
 223         /* Set disconnect detection trigger point to 625mv */
 224         uoc_write(UOC_HIWORD_UPDATE(0x9, 0xf, 11), 0x7bc);
 225
 226         /* other haredware init,include:
 227          * DRV_VBUS GPIO init */
 228         if (gpio_is_valid(control_usb->host_gpios->gpio)) {
 229                 if (!gpio_get_value(control_usb->host_gpios->gpio))
 230                         gpio_set_value(control_usb->host_gpios->gpio, 1);
 231         }
 232 }
 233
 234 static void usb20ehci_phy_suspend(void *pdata, int suspend)
 235 {
 236         struct rkehci_platform_data *usbpdata = pdata;
 237
 238         if (suspend) {
 239                 /* enable soft control */
 240                 uoc_write(UOC_HIWORD_UPDATE(0x1d5, 0x1ff, 0), 0x728);
 241                 usbpdata->phy_status = 1;
 242         } else {
 243                 /* exit suspend */
 244                 uoc_write(UOC_HIWORD_UPDATE(0x0, 0x1, 0), 0x728);
 245                 usbpdata->phy_status = 0;
 246         }
 247 }
 248
 249 static void usb20ehci_soft_reset(void *pdata, enum rkusb_rst_flag rst_type)
 250 {
 251         struct rkehci_platform_data *usbpdata = pdata;
 252         struct reset_control *rst_host_h, *rst_host_p, *rst_host_c;
 253
 254         rst_host_h = devm_reset_control_get(usbpdata->dev, "host_ahb");
 255         rst_host_p = devm_reset_control_get(usbpdata->dev, "host_phy");
 256         rst_host_c = devm_reset_control_get(usbpdata->dev, "host_controller");
 257         if (IS_ERR(rst_host_h) || IS_ERR(rst_host_p) || IS_ERR(rst_host_c)) {
 258                 dev_err(usbpdata->dev, "Fail to get reset control from dts\n");
 259                 return;
 260         }
 261
 262         switch (rst_type) {
 263         case RST_POR:
 264                 /* PHY reset */
 265                 uoc_write(UOC_HIWORD_UPDATE(0x1, 0x3, 0), 0x728);
 266                 reset_control_assert(rst_host_p);
 267                 udelay(15);
 268                 uoc_write(UOC_HIWORD_UPDATE(0x2, 0x3, 0), 0x728);
 269
 270                 udelay(1500);
 271                 reset_control_deassert(rst_host_p);
 272
 273                 /* Controller reset */
 274                 reset_control_assert(rst_host_c);
 275                 reset_control_assert(rst_host_h);
 276
 277                 udelay(5);
 278
 279                 reset_control_deassert(rst_host_c);
 280                 reset_control_deassert(rst_host_h);
 281                 break;
 282
 283         default:
 284                 break;
 285         }
 286 }
 287
 288 static void usb20ehci_clock_init(void *pdata)
 289 {
 290 }
 291
 292 static void usb20ehci_clock_enable(void *pdata, int enable)
 293 {
 294 }
 295
 296 static int usb20ehci_get_status(int id)
 297 {
 298         /* For HOST port in rk336x can not get any info from GRF */
 299         return -ENOENT;
 300 }
 301
 302 struct rkehci_platform_data usb20ehci_pdata_rk3368 = {
 303         .phyclk = NULL,
 304         .ahbclk = NULL,
 305         .phy_status = 0,
 306         .hw_init = usb20ehci_hw_init,
 307         .phy_suspend = usb20ehci_phy_suspend,
 308         .soft_reset = usb20ehci_soft_reset,
 309         .clock_init = usb20ehci_clock_init,
 310         .clock_enable = usb20ehci_clock_enable,
 311         .get_status = usb20ehci_get_status,
 312 };
 313 #endif
 314
 315 struct dwc_otg_platform_data usb20ohci_pdata_rk3368;
 316
 317 #ifdef CONFIG_OF
 318 static const struct of_device_id rk_usb_control_id_table[] = {
 319         {
 320          .compatible = "rockchip,rk3368-usb-control",
 321          },
 322         {},
 323 };
 324 #endif
 325 /*********************************************************************
 326                         rk3126 usb detections
 327 *********************************************************************/
 328
 329 #define WAKE_LOCK_TIMEOUT (HZ * 10)
 330 static inline void do_wakeup(struct work_struct *work)
 331 {
 332         /* wake up the system */
 333         rk_send_wakeup_key();
 334 }
 335
 336 static void usb_battery_charger_detect_work(struct work_struct *work)
 337 {
 338         rk_battery_charger_detect_cb(usb_battery_charger_detect(1));
 339 }
 340
 341 /********** handler for bvalid irq **********/
 342 static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
 343 {
 344         /* clear irq */
 345         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x6a0);
 346 #ifdef CONFIG_RK_USB_UART
 347         /* usb otg dp/dm switch to usb phy */
 348         dwc_otg_uart_mode(NULL, PHY_USB_MODE);
 349 #endif
 350
 351         if (control_usb->usb_irq_wakeup) {
 352                 wake_lock_timeout(&control_usb->usb_wakelock,
 353                                   WAKE_LOCK_TIMEOUT);
 354                 schedule_delayed_work(&control_usb->usb_det_wakeup_work,
 355                                       HZ / 10);
 356         }
 357
 358         schedule_delayed_work(&control_usb->usb_charger_det_work, HZ / 10);
 359
 360         return IRQ_HANDLED;
 361 }
 362
 363 /************* register usb detection irqs **************/
 364 static int otg_irq_detect_init(struct platform_device *pdev)
 365 {
 366         int ret = 0;
 367         int irq = 0;
 368
 369         wake_lock_init(&control_usb->usb_wakelock, WAKE_LOCK_SUSPEND,
 370                        "usb_detect");
 371         INIT_DELAYED_WORK(&control_usb->usb_det_wakeup_work, do_wakeup);
 372
 373         /*register otg_bvalid irq */
 374         irq = platform_get_irq_byname(pdev, "otg_bvalid");
 375         if ((irq > 0) && control_usb->usb_irq_wakeup) {
 376                 ret = request_irq(irq, bvalid_irq_handler,
 377                                   0, "otg_bvalid", NULL);
 378                 if (ret < 0) {
 379                         dev_err(&pdev->dev, "request_irq %d failed!\n", irq);
 380                 } else {
 381                         /* enable bvalid irq  */
 382                         uoc_write(UOC_HIWORD_UPDATE(0x1, 0x1, 3), 0x680);
 383                 }
 384         }
 385
 386         return 0;
 387 }
 388
 389 /********** end of usb detections **********/
 390 #ifdef CONFIG_OF
 391 static const struct of_device_id dwc_otg_control_usb_id_table[] = {
 392         {
 393          .compatible = "rockchip,rk3368-dwc-control-usb",
 394          },
 395         {},
 396 };
 397 #endif
 398 static int dwc_otg_control_usb_probe(struct platform_device *pdev)
 399 {
 400         struct device *dev = &pdev->dev;
 401         struct device_node *np = dev->of_node;
 402         struct clk *hclk_usb_peri;
 403         struct regmap *grf;
 404         int gpio, ret = 0;
 405         u32 offset;
 406
 407         control_usb = devm_kzalloc(dev, sizeof(*control_usb), GFP_KERNEL);
 408         if (!control_usb) {
 409                 dev_err(&pdev->dev, "Unable to alloc memory for control usb\n");
 410                 return -ENOMEM;
 411         }
 412
 413         /* Init regmap GRF */
 414         grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
 415         if (IS_ERR(grf)) {
 416                 dev_err(&pdev->dev, "Missing rockchip,grf property\n");
 417                 return PTR_ERR(grf);
 418         }
 419         control_usb->grf = grf;
 420
 421         /* get the reg offset of GRF_SOC_STATUS for USB2.0 OTG */
 422         if (of_property_read_u32(np, "grf-offset", &offset)) {
 423                 dev_err(&pdev->dev, "missing reg property in node %s\n",
 424                         np->name);
 425                 return -EINVAL;
 426         }
 427         control_usb->grf_otg_st_offset = offset;
 428
 429         /* Init Vbus-drv GPIOs */
 430         control_usb->host_gpios =
 431             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 432         if (!control_usb->host_gpios) {
 433                 dev_err(&pdev->dev, "Unable to alloc memory for host_gpios\n");
 434                 return -ENOMEM;
 435         }
 436
 437         gpio = of_get_named_gpio(np, "host_drv_gpio", 0);
 438         control_usb->host_gpios->gpio = gpio;
 439
 440         if (gpio_is_valid(gpio)) {
 441                 if (devm_gpio_request(&pdev->dev, gpio, "usb_host_drv")) {
 442                         dev_err(&pdev->dev,
 443                                 "Failed to request GPIO%d for host_drv\n",
 444                                 gpio);
 445                         return -EINVAL;
 446                 }
 447                 gpio_direction_output(control_usb->host_gpios->gpio, 1);
 448         }
 449
 450         control_usb->otg_gpios =
 451             devm_kzalloc(&pdev->dev, sizeof(struct gpio), GFP_KERNEL);
 452         if (!control_usb->otg_gpios) {
 453                 dev_err(&pdev->dev, "Unable to alloc memory for otg_gpios\n");
 454                 return -ENOMEM;
 455         }
 456
 457         gpio = of_get_named_gpio(np, "otg_drv_gpio", 0);
 458         control_usb->otg_gpios->gpio = gpio;
 459
 460         if (gpio_is_valid(gpio)) {
 461                 if (devm_gpio_request(&pdev->dev, gpio, "usb_otg_drv")) {
 462                         dev_err(&pdev->dev,
 463                                 "failed to request GPIO%d for otg_drv\n", gpio);
 464                         return -EINVAL;
 465                 }
 466                 gpio_direction_output(control_usb->otg_gpios->gpio, 0);
 467         }
 468
 469
 470         control_usb->remote_wakeup = of_property_read_bool(np,
 471                                                            "rockchip,remote_wakeup");
 472         control_usb->usb_irq_wakeup = of_property_read_bool(np,
 473                                                             "rockchip,usb_irq_wakeup");
 474
 475         /* Init hclk_usb_peri */
 476         hclk_usb_peri = devm_clk_get(&pdev->dev, "hclk_usb_peri");
 477         if (IS_ERR(hclk_usb_peri)) {
 478                 dev_info(&pdev->dev, "no hclk_usb_peri clk specified\n");
 479                 hclk_usb_peri = NULL;
 480         }
 481         control_usb->hclk_usb_peri = hclk_usb_peri;
 482         clk_prepare_enable(hclk_usb_peri);
 483
 484 #ifdef CONFIG_USB20_OTG
 485         INIT_DELAYED_WORK(&control_usb->usb_charger_det_work,
 486                           usb_battery_charger_detect_work);
 487
 488         if (usb20otg_get_status(USB_STATUS_BVABLID))
 489                 schedule_delayed_work(&control_usb->usb_charger_det_work,
 490                                       HZ / 10);
 491 #endif
 492
 493         ret = otg_irq_detect_init(pdev);
 494         if (ret < 0)
 495                 goto err;
 496
 497         return 0;
 498
 499 err:
 500         clk_disable_unprepare(hclk_usb_peri);
 501         return ret;
 502 }
 503
 504 static int dwc_otg_control_usb_remove(struct platform_device *pdev)
 505 {
 506         clk_disable_unprepare(control_usb->hclk_usb_peri);
 507         return 0;
 508 }
 509
 510 static struct platform_driver dwc_otg_control_usb_driver = {
 511         .probe = dwc_otg_control_usb_probe,
 512         .remove = dwc_otg_control_usb_remove,
 513         .driver = {
 514                    .name = "rk3368-dwc-control-usb",
 515                    .owner = THIS_MODULE,
 516                    .of_match_table = of_match_ptr(dwc_otg_control_usb_id_table),
 517                    },
 518 };
 519
 520 static int __init dwc_otg_control_usb_init(void)
 521 {
 522         int retval = 0;
 523
 524         retval |= platform_driver_register(&dwc_otg_control_usb_driver);
 525         return retval;
 526 }
 527
 528 subsys_initcall(dwc_otg_control_usb_init);
 529
 530 static void __exit dwc_otg_control_usb_exit(void)
 531 {
 532         platform_driver_unregister(&dwc_otg_control_usb_driver);
 533 }
 534
 535 module_exit(dwc_otg_control_usb_exit);
 536 MODULE_ALIAS("platform: dwc_control_usb");
 537 MODULE_AUTHOR("RockChip Inc.");
 538 MODULE_DESCRIPTION("RockChip Control Module USB Driver");
 539 MODULE_LICENSE("GPL v2");
 540 #endif