1 // SPDX-License-Identifier: GPL-1.0+ 2 /* 3 * Renesas USB driver 4 * 5 * Copyright (C) 2011 Renesas Solutions Corp. 6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 */ 8 #include <linux/err.h> 9 #include <linux/gpio.h> 10 #include <linux/io.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/of_gpio.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/slab.h> 16 #include <linux/sysfs.h> 17 #include "common.h" 18 #include "rcar2.h" 19 #include "rcar3.h" 20 21 /* 22 * image of renesas_usbhs 23 * 24 * ex) gadget case 25 26 * mod.c 27 * mod_gadget.c 28 * mod_host.c pipe.c fifo.c 29 * 30 * +-------+ +-----------+ 31 * | pipe0 |------>| fifo pio | 32 * +------------+ +-------+ +-----------+ 33 * | mod_gadget |=====> | pipe1 |--+ 34 * +------------+ +-------+ | +-----------+ 35 * | pipe2 | | +-| fifo dma0 | 36 * +------------+ +-------+ | | +-----------+ 37 * | mod_host | | pipe3 |<-|--+ 38 * +------------+ +-------+ | +-----------+ 39 * | .... | +--->| fifo dma1 | 40 * | .... | +-----------+ 41 */ 42 43 44 #define USBHSF_RUNTIME_PWCTRL (1 << 0) 45 46 /* status */ 47 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0) 48 #define usbhsc_flags_set(p, b) ((p)->flags |= (b)) 49 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b)) 50 #define usbhsc_flags_has(p, b) ((p)->flags & (b)) 51 52 /* 53 * platform call back 54 * 55 * renesas usb support platform callback function. 56 * Below macro call it. 57 * if platform doesn't have callback, it return 0 (no error) 58 */ 59 #define usbhs_platform_call(priv, func, args...)\ 60 (!(priv) ? -ENODEV : \ 61 !((priv)->pfunc.func) ? 0 : \ 62 (priv)->pfunc.func(args)) 63 64 /* 65 * common functions 66 */ 67 u16 usbhs_read(struct usbhs_priv *priv, u32 reg) 68 { 69 return ioread16(priv->base + reg); 70 } 71 72 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) 73 { 74 iowrite16(data, priv->base + reg); 75 } 76 77 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) 78 { 79 u16 val = usbhs_read(priv, reg); 80 81 val &= ~mask; 82 val |= data & mask; 83 84 usbhs_write(priv, reg, val); 85 } 86 87 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) 88 { 89 return dev_get_drvdata(&pdev->dev); 90 } 91 92 /* 93 * syscfg functions 94 */ 95 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) 96 { 97 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); 98 } 99 100 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) 101 { 102 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 103 u16 val = DCFM | DRPD | HSE | USBE; 104 int has_otg = usbhs_get_dparam(priv, has_otg); 105 106 if (has_otg) 107 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN)); 108 109 /* 110 * if enable 111 * 112 * - select Host mode 113 * - D+ Line/D- Line Pull-down 114 */ 115 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 116 } 117 118 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) 119 { 120 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 121 u16 val = HSE | USBE; 122 123 /* 124 * if enable 125 * 126 * - select Function mode 127 * - D+ Line Pull-up is disabled 128 * When D+ Line Pull-up is enabled, 129 * calling usbhs_sys_function_pullup(,1) 130 */ 131 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 132 } 133 134 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) 135 { 136 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); 137 } 138 139 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) 140 { 141 usbhs_write(priv, TESTMODE, mode); 142 } 143 144 /* 145 * frame functions 146 */ 147 int usbhs_frame_get_num(struct usbhs_priv *priv) 148 { 149 return usbhs_read(priv, FRMNUM) & FRNM_MASK; 150 } 151 152 /* 153 * usb request functions 154 */ 155 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 156 { 157 u16 val; 158 159 val = usbhs_read(priv, USBREQ); 160 req->bRequest = (val >> 8) & 0xFF; 161 req->bRequestType = (val >> 0) & 0xFF; 162 163 req->wValue = usbhs_read(priv, USBVAL); 164 req->wIndex = usbhs_read(priv, USBINDX); 165 req->wLength = usbhs_read(priv, USBLENG); 166 } 167 168 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 169 { 170 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); 171 usbhs_write(priv, USBVAL, req->wValue); 172 usbhs_write(priv, USBINDX, req->wIndex); 173 usbhs_write(priv, USBLENG, req->wLength); 174 175 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); 176 } 177 178 /* 179 * bus/vbus functions 180 */ 181 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) 182 { 183 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); 184 185 if (status != USBRST) { 186 struct device *dev = usbhs_priv_to_dev(priv); 187 dev_err(dev, "usbhs should be reset\n"); 188 } 189 190 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); 191 } 192 193 void usbhs_bus_send_reset(struct usbhs_priv *priv) 194 { 195 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); 196 } 197 198 int usbhs_bus_get_speed(struct usbhs_priv *priv) 199 { 200 u16 dvstctr = usbhs_read(priv, DVSTCTR); 201 202 switch (RHST & dvstctr) { 203 case RHST_LOW_SPEED: 204 return USB_SPEED_LOW; 205 case RHST_FULL_SPEED: 206 return USB_SPEED_FULL; 207 case RHST_HIGH_SPEED: 208 return USB_SPEED_HIGH; 209 } 210 211 return USB_SPEED_UNKNOWN; 212 } 213 214 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) 215 { 216 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 217 218 return usbhs_platform_call(priv, set_vbus, pdev, enable); 219 } 220 221 static void usbhsc_bus_init(struct usbhs_priv *priv) 222 { 223 usbhs_write(priv, DVSTCTR, 0); 224 225 usbhs_vbus_ctrl(priv, 0); 226 } 227 228 /* 229 * device configuration 230 */ 231 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, 232 u16 upphub, u16 hubport, u16 speed) 233 { 234 struct device *dev = usbhs_priv_to_dev(priv); 235 u16 usbspd = 0; 236 u32 reg = DEVADD0 + (2 * devnum); 237 238 if (devnum > 10) { 239 dev_err(dev, "cannot set speed to unknown device %d\n", devnum); 240 return -EIO; 241 } 242 243 if (upphub > 0xA) { 244 dev_err(dev, "unsupported hub number %d\n", upphub); 245 return -EIO; 246 } 247 248 switch (speed) { 249 case USB_SPEED_LOW: 250 usbspd = USBSPD_SPEED_LOW; 251 break; 252 case USB_SPEED_FULL: 253 usbspd = USBSPD_SPEED_FULL; 254 break; 255 case USB_SPEED_HIGH: 256 usbspd = USBSPD_SPEED_HIGH; 257 break; 258 default: 259 dev_err(dev, "unsupported speed %d\n", speed); 260 return -EIO; 261 } 262 263 usbhs_write(priv, reg, UPPHUB(upphub) | 264 HUBPORT(hubport)| 265 USBSPD(usbspd)); 266 267 return 0; 268 } 269 270 /* 271 * interrupt functions 272 */ 273 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) 274 { 275 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); 276 277 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); 278 } 279 280 /* 281 * local functions 282 */ 283 static void usbhsc_set_buswait(struct usbhs_priv *priv) 284 { 285 int wait = usbhs_get_dparam(priv, buswait_bwait); 286 287 /* set bus wait if platform have */ 288 if (wait) 289 usbhs_bset(priv, BUSWAIT, 0x000F, wait); 290 } 291 292 /* 293 * platform default param 294 */ 295 296 /* commonly used on old SH-Mobile SoCs */ 297 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { 298 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 299 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), 300 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), 301 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), 302 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), 303 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 304 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 305 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 306 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 307 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), 308 }; 309 310 /* commonly used on newer SH-Mobile and R-Car SoCs */ 311 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { 312 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 313 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 314 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 315 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 316 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 317 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 318 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 319 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 320 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 321 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), 322 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), 323 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), 324 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), 325 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), 326 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), 327 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), 328 }; 329 330 /* 331 * power control 332 */ 333 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) 334 { 335 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 336 struct device *dev = usbhs_priv_to_dev(priv); 337 338 if (enable) { 339 /* enable PM */ 340 pm_runtime_get_sync(dev); 341 342 /* enable platform power */ 343 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 344 345 /* USB on */ 346 usbhs_sys_clock_ctrl(priv, enable); 347 } else { 348 /* USB off */ 349 usbhs_sys_clock_ctrl(priv, enable); 350 351 /* disable platform power */ 352 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 353 354 /* disable PM */ 355 pm_runtime_put_sync(dev); 356 } 357 } 358 359 /* 360 * hotplug 361 */ 362 static void usbhsc_hotplug(struct usbhs_priv *priv) 363 { 364 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 365 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 366 int id; 367 int enable; 368 int cable; 369 int ret; 370 371 /* 372 * get vbus status from platform 373 */ 374 enable = usbhs_platform_call(priv, get_vbus, pdev); 375 376 /* 377 * get id from platform 378 */ 379 id = usbhs_platform_call(priv, get_id, pdev); 380 381 if (enable && !mod) { 382 if (priv->edev) { 383 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); 384 if ((cable > 0 && id != USBHS_HOST) || 385 (!cable && id != USBHS_GADGET)) { 386 dev_info(&pdev->dev, 387 "USB cable plugged in doesn't match the selected role!\n"); 388 return; 389 } 390 } 391 392 ret = usbhs_mod_change(priv, id); 393 if (ret < 0) 394 return; 395 396 dev_dbg(&pdev->dev, "%s enable\n", __func__); 397 398 /* power on */ 399 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 400 usbhsc_power_ctrl(priv, enable); 401 402 /* bus init */ 403 usbhsc_set_buswait(priv); 404 usbhsc_bus_init(priv); 405 406 /* module start */ 407 usbhs_mod_call(priv, start, priv); 408 409 } else if (!enable && mod) { 410 dev_dbg(&pdev->dev, "%s disable\n", __func__); 411 412 /* module stop */ 413 usbhs_mod_call(priv, stop, priv); 414 415 /* bus init */ 416 usbhsc_bus_init(priv); 417 418 /* power off */ 419 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 420 usbhsc_power_ctrl(priv, enable); 421 422 usbhs_mod_change(priv, -1); 423 424 /* reset phy for next connection */ 425 usbhs_platform_call(priv, phy_reset, pdev); 426 } 427 } 428 429 /* 430 * notify hotplug 431 */ 432 static void usbhsc_notify_hotplug(struct work_struct *work) 433 { 434 struct usbhs_priv *priv = container_of(work, 435 struct usbhs_priv, 436 notify_hotplug_work.work); 437 usbhsc_hotplug(priv); 438 } 439 440 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev) 441 { 442 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 443 int delay = usbhs_get_dparam(priv, detection_delay); 444 445 /* 446 * This functions will be called in interrupt. 447 * To make sure safety context, 448 * use workqueue for usbhs_notify_hotplug 449 */ 450 schedule_delayed_work(&priv->notify_hotplug_work, 451 msecs_to_jiffies(delay)); 452 return 0; 453 } 454 455 /* 456 * platform functions 457 */ 458 static const struct of_device_id usbhs_of_match[] = { 459 { 460 .compatible = "renesas,usbhs-r8a7790", 461 .data = (void *)USBHS_TYPE_RCAR_GEN2, 462 }, 463 { 464 .compatible = "renesas,usbhs-r8a7791", 465 .data = (void *)USBHS_TYPE_RCAR_GEN2, 466 }, 467 { 468 .compatible = "renesas,usbhs-r8a7794", 469 .data = (void *)USBHS_TYPE_RCAR_GEN2, 470 }, 471 { 472 .compatible = "renesas,usbhs-r8a7795", 473 .data = (void *)USBHS_TYPE_RCAR_GEN3, 474 }, 475 { 476 .compatible = "renesas,usbhs-r8a7796", 477 .data = (void *)USBHS_TYPE_RCAR_GEN3, 478 }, 479 { 480 .compatible = "renesas,usbhs-r8a77995", 481 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL, 482 }, 483 { 484 .compatible = "renesas,rcar-gen2-usbhs", 485 .data = (void *)USBHS_TYPE_RCAR_GEN2, 486 }, 487 { 488 .compatible = "renesas,rcar-gen3-usbhs", 489 .data = (void *)USBHS_TYPE_RCAR_GEN3, 490 }, 491 { }, 492 }; 493 MODULE_DEVICE_TABLE(of, usbhs_of_match); 494 495 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev) 496 { 497 struct renesas_usbhs_platform_info *info; 498 struct renesas_usbhs_driver_param *dparam; 499 u32 tmp; 500 int gpio; 501 502 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); 503 if (!info) 504 return NULL; 505 506 dparam = &info->driver_param; 507 dparam->type = (uintptr_t)of_device_get_match_data(dev); 508 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp)) 509 dparam->buswait_bwait = tmp; 510 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0, 511 NULL); 512 if (gpio > 0) 513 dparam->enable_gpio = gpio; 514 515 if (dparam->type == USBHS_TYPE_RCAR_GEN2 || 516 dparam->type == USBHS_TYPE_RCAR_GEN3 || 517 dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) { 518 dparam->has_usb_dmac = 1; 519 dparam->pipe_configs = usbhsc_new_pipe; 520 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 521 } 522 523 return info; 524 } 525 526 static int usbhs_probe(struct platform_device *pdev) 527 { 528 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev); 529 struct renesas_usbhs_driver_callback *dfunc; 530 struct usbhs_priv *priv; 531 struct resource *res, *irq_res; 532 int ret; 533 534 /* check device node */ 535 if (pdev->dev.of_node) 536 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev); 537 538 /* check platform information */ 539 if (!info) { 540 dev_err(&pdev->dev, "no platform information\n"); 541 return -EINVAL; 542 } 543 544 /* platform data */ 545 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 546 if (!irq_res) { 547 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n"); 548 return -ENODEV; 549 } 550 551 /* usb private data */ 552 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 553 if (!priv) 554 return -ENOMEM; 555 556 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 557 priv->base = devm_ioremap_resource(&pdev->dev, res); 558 if (IS_ERR(priv->base)) 559 return PTR_ERR(priv->base); 560 561 if (of_property_read_bool(pdev->dev.of_node, "extcon")) { 562 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0); 563 if (IS_ERR(priv->edev)) 564 return PTR_ERR(priv->edev); 565 } 566 567 /* 568 * care platform info 569 */ 570 571 memcpy(&priv->dparam, 572 &info->driver_param, 573 sizeof(struct renesas_usbhs_driver_param)); 574 575 switch (priv->dparam.type) { 576 case USBHS_TYPE_RCAR_GEN2: 577 priv->pfunc = usbhs_rcar2_ops; 578 break; 579 case USBHS_TYPE_RCAR_GEN3: 580 priv->pfunc = usbhs_rcar3_ops; 581 break; 582 case USBHS_TYPE_RCAR_GEN3_WITH_PLL: 583 priv->pfunc = usbhs_rcar3_with_pll_ops; 584 break; 585 default: 586 if (!info->platform_callback.get_id) { 587 dev_err(&pdev->dev, "no platform callbacks"); 588 return -EINVAL; 589 } 590 memcpy(&priv->pfunc, 591 &info->platform_callback, 592 sizeof(struct renesas_usbhs_platform_callback)); 593 break; 594 } 595 596 /* set driver callback functions for platform */ 597 dfunc = &info->driver_callback; 598 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug; 599 600 /* set default param if platform doesn't have */ 601 if (!priv->dparam.pipe_configs) { 602 priv->dparam.pipe_configs = usbhsc_default_pipe; 603 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); 604 } 605 if (!priv->dparam.pio_dma_border) 606 priv->dparam.pio_dma_border = 64; /* 64byte */ 607 608 /* FIXME */ 609 /* runtime power control ? */ 610 if (priv->pfunc.get_vbus) 611 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL); 612 613 /* 614 * priv settings 615 */ 616 priv->irq = irq_res->start; 617 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE) 618 priv->irqflags = IRQF_SHARED; 619 priv->pdev = pdev; 620 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); 621 spin_lock_init(usbhs_priv_to_lock(priv)); 622 623 /* call pipe and module init */ 624 ret = usbhs_pipe_probe(priv); 625 if (ret < 0) 626 return ret; 627 628 ret = usbhs_fifo_probe(priv); 629 if (ret < 0) 630 goto probe_end_pipe_exit; 631 632 ret = usbhs_mod_probe(priv); 633 if (ret < 0) 634 goto probe_end_fifo_exit; 635 636 /* dev_set_drvdata should be called after usbhs_mod_init */ 637 platform_set_drvdata(pdev, priv); 638 639 /* 640 * deviece reset here because 641 * USB device might be used in boot loader. 642 */ 643 usbhs_sys_clock_ctrl(priv, 0); 644 645 /* check GPIO determining if USB function should be enabled */ 646 if (priv->dparam.enable_gpio) { 647 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL); 648 ret = !gpio_get_value(priv->dparam.enable_gpio); 649 gpio_free(priv->dparam.enable_gpio); 650 if (ret) { 651 dev_warn(&pdev->dev, 652 "USB function not selected (GPIO %d)\n", 653 priv->dparam.enable_gpio); 654 ret = -ENOTSUPP; 655 goto probe_end_mod_exit; 656 } 657 } 658 659 /* 660 * platform call 661 * 662 * USB phy setup might depend on CPU/Board. 663 * If platform has its callback functions, 664 * call it here. 665 */ 666 ret = usbhs_platform_call(priv, hardware_init, pdev); 667 if (ret < 0) { 668 dev_err(&pdev->dev, "platform init failed.\n"); 669 goto probe_end_mod_exit; 670 } 671 672 /* reset phy for connection */ 673 usbhs_platform_call(priv, phy_reset, pdev); 674 675 /* power control */ 676 pm_runtime_enable(&pdev->dev); 677 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { 678 usbhsc_power_ctrl(priv, 1); 679 usbhs_mod_autonomy_mode(priv); 680 } 681 682 /* 683 * manual call notify_hotplug for cold plug 684 */ 685 usbhsc_drvcllbck_notify_hotplug(pdev); 686 687 dev_info(&pdev->dev, "probed\n"); 688 689 return ret; 690 691 probe_end_mod_exit: 692 usbhs_mod_remove(priv); 693 probe_end_fifo_exit: 694 usbhs_fifo_remove(priv); 695 probe_end_pipe_exit: 696 usbhs_pipe_remove(priv); 697 698 dev_info(&pdev->dev, "probe failed (%d)\n", ret); 699 700 return ret; 701 } 702 703 static int usbhs_remove(struct platform_device *pdev) 704 { 705 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 706 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev); 707 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback; 708 709 dev_dbg(&pdev->dev, "usb remove\n"); 710 711 dfunc->notify_hotplug = NULL; 712 713 /* power off */ 714 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 715 usbhsc_power_ctrl(priv, 0); 716 717 pm_runtime_disable(&pdev->dev); 718 719 usbhs_platform_call(priv, hardware_exit, pdev); 720 usbhs_mod_remove(priv); 721 usbhs_fifo_remove(priv); 722 usbhs_pipe_remove(priv); 723 724 return 0; 725 } 726 727 static int usbhsc_suspend(struct device *dev) 728 { 729 struct usbhs_priv *priv = dev_get_drvdata(dev); 730 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 731 732 if (mod) { 733 usbhs_mod_call(priv, stop, priv); 734 usbhs_mod_change(priv, -1); 735 } 736 737 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 738 usbhsc_power_ctrl(priv, 0); 739 740 return 0; 741 } 742 743 static int usbhsc_resume(struct device *dev) 744 { 745 struct usbhs_priv *priv = dev_get_drvdata(dev); 746 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 747 748 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { 749 usbhsc_power_ctrl(priv, 1); 750 usbhs_mod_autonomy_mode(priv); 751 } 752 753 usbhs_platform_call(priv, phy_reset, pdev); 754 755 usbhsc_drvcllbck_notify_hotplug(pdev); 756 757 return 0; 758 } 759 760 static int usbhsc_runtime_nop(struct device *dev) 761 { 762 /* Runtime PM callback shared between ->runtime_suspend() 763 * and ->runtime_resume(). Simply returns success. 764 * 765 * This driver re-initializes all registers after 766 * pm_runtime_get_sync() anyway so there is no need 767 * to save and restore registers here. 768 */ 769 return 0; 770 } 771 772 static const struct dev_pm_ops usbhsc_pm_ops = { 773 .suspend = usbhsc_suspend, 774 .resume = usbhsc_resume, 775 .runtime_suspend = usbhsc_runtime_nop, 776 .runtime_resume = usbhsc_runtime_nop, 777 }; 778 779 static struct platform_driver renesas_usbhs_driver = { 780 .driver = { 781 .name = "renesas_usbhs", 782 .pm = &usbhsc_pm_ops, 783 .of_match_table = of_match_ptr(usbhs_of_match), 784 }, 785 .probe = usbhs_probe, 786 .remove = usbhs_remove, 787 }; 788 789 module_platform_driver(renesas_usbhs_driver); 790 791 MODULE_LICENSE("GPL"); 792 MODULE_DESCRIPTION("Renesas USB driver"); 793 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 794