1 /* 2 * Renesas USB driver 3 * 4 * Copyright (C) 2011 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 */ 17 #include <linux/err.h> 18 #include <linux/gpio.h> 19 #include <linux/io.h> 20 #include <linux/module.h> 21 #include <linux/of_device.h> 22 #include <linux/of_gpio.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/slab.h> 25 #include <linux/sysfs.h> 26 #include "common.h" 27 #include "rcar2.h" 28 #include "rcar3.h" 29 30 /* 31 * image of renesas_usbhs 32 * 33 * ex) gadget case 34 35 * mod.c 36 * mod_gadget.c 37 * mod_host.c pipe.c fifo.c 38 * 39 * +-------+ +-----------+ 40 * | pipe0 |------>| fifo pio | 41 * +------------+ +-------+ +-----------+ 42 * | mod_gadget |=====> | pipe1 |--+ 43 * +------------+ +-------+ | +-----------+ 44 * | pipe2 | | +-| fifo dma0 | 45 * +------------+ +-------+ | | +-----------+ 46 * | mod_host | | pipe3 |<-|--+ 47 * +------------+ +-------+ | +-----------+ 48 * | .... | +--->| fifo dma1 | 49 * | .... | +-----------+ 50 */ 51 52 53 #define USBHSF_RUNTIME_PWCTRL (1 << 0) 54 55 /* status */ 56 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0) 57 #define usbhsc_flags_set(p, b) ((p)->flags |= (b)) 58 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b)) 59 #define usbhsc_flags_has(p, b) ((p)->flags & (b)) 60 61 /* 62 * platform call back 63 * 64 * renesas usb support platform callback function. 65 * Below macro call it. 66 * if platform doesn't have callback, it return 0 (no error) 67 */ 68 #define usbhs_platform_call(priv, func, args...)\ 69 (!(priv) ? -ENODEV : \ 70 !((priv)->pfunc.func) ? 0 : \ 71 (priv)->pfunc.func(args)) 72 73 /* 74 * common functions 75 */ 76 u16 usbhs_read(struct usbhs_priv *priv, u32 reg) 77 { 78 return ioread16(priv->base + reg); 79 } 80 81 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) 82 { 83 iowrite16(data, priv->base + reg); 84 } 85 86 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) 87 { 88 u16 val = usbhs_read(priv, reg); 89 90 val &= ~mask; 91 val |= data & mask; 92 93 usbhs_write(priv, reg, val); 94 } 95 96 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) 97 { 98 return dev_get_drvdata(&pdev->dev); 99 } 100 101 /* 102 * syscfg functions 103 */ 104 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) 105 { 106 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); 107 } 108 109 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) 110 { 111 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 112 u16 val = DCFM | DRPD | HSE | USBE; 113 int has_otg = usbhs_get_dparam(priv, has_otg); 114 115 if (has_otg) 116 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN)); 117 118 /* 119 * if enable 120 * 121 * - select Host mode 122 * - D+ Line/D- Line Pull-down 123 */ 124 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 125 } 126 127 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) 128 { 129 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 130 u16 val = HSE | USBE; 131 132 /* 133 * if enable 134 * 135 * - select Function mode 136 * - D+ Line Pull-up is disabled 137 * When D+ Line Pull-up is enabled, 138 * calling usbhs_sys_function_pullup(,1) 139 */ 140 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 141 } 142 143 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) 144 { 145 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); 146 } 147 148 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) 149 { 150 usbhs_write(priv, TESTMODE, mode); 151 } 152 153 /* 154 * frame functions 155 */ 156 int usbhs_frame_get_num(struct usbhs_priv *priv) 157 { 158 return usbhs_read(priv, FRMNUM) & FRNM_MASK; 159 } 160 161 /* 162 * usb request functions 163 */ 164 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 165 { 166 u16 val; 167 168 val = usbhs_read(priv, USBREQ); 169 req->bRequest = (val >> 8) & 0xFF; 170 req->bRequestType = (val >> 0) & 0xFF; 171 172 req->wValue = usbhs_read(priv, USBVAL); 173 req->wIndex = usbhs_read(priv, USBINDX); 174 req->wLength = usbhs_read(priv, USBLENG); 175 } 176 177 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 178 { 179 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); 180 usbhs_write(priv, USBVAL, req->wValue); 181 usbhs_write(priv, USBINDX, req->wIndex); 182 usbhs_write(priv, USBLENG, req->wLength); 183 184 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); 185 } 186 187 /* 188 * bus/vbus functions 189 */ 190 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) 191 { 192 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); 193 194 if (status != USBRST) { 195 struct device *dev = usbhs_priv_to_dev(priv); 196 dev_err(dev, "usbhs should be reset\n"); 197 } 198 199 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); 200 } 201 202 void usbhs_bus_send_reset(struct usbhs_priv *priv) 203 { 204 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); 205 } 206 207 int usbhs_bus_get_speed(struct usbhs_priv *priv) 208 { 209 u16 dvstctr = usbhs_read(priv, DVSTCTR); 210 211 switch (RHST & dvstctr) { 212 case RHST_LOW_SPEED: 213 return USB_SPEED_LOW; 214 case RHST_FULL_SPEED: 215 return USB_SPEED_FULL; 216 case RHST_HIGH_SPEED: 217 return USB_SPEED_HIGH; 218 } 219 220 return USB_SPEED_UNKNOWN; 221 } 222 223 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) 224 { 225 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 226 227 return usbhs_platform_call(priv, set_vbus, pdev, enable); 228 } 229 230 static void usbhsc_bus_init(struct usbhs_priv *priv) 231 { 232 usbhs_write(priv, DVSTCTR, 0); 233 234 usbhs_vbus_ctrl(priv, 0); 235 } 236 237 /* 238 * device configuration 239 */ 240 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, 241 u16 upphub, u16 hubport, u16 speed) 242 { 243 struct device *dev = usbhs_priv_to_dev(priv); 244 u16 usbspd = 0; 245 u32 reg = DEVADD0 + (2 * devnum); 246 247 if (devnum > 10) { 248 dev_err(dev, "cannot set speed to unknown device %d\n", devnum); 249 return -EIO; 250 } 251 252 if (upphub > 0xA) { 253 dev_err(dev, "unsupported hub number %d\n", upphub); 254 return -EIO; 255 } 256 257 switch (speed) { 258 case USB_SPEED_LOW: 259 usbspd = USBSPD_SPEED_LOW; 260 break; 261 case USB_SPEED_FULL: 262 usbspd = USBSPD_SPEED_FULL; 263 break; 264 case USB_SPEED_HIGH: 265 usbspd = USBSPD_SPEED_HIGH; 266 break; 267 default: 268 dev_err(dev, "unsupported speed %d\n", speed); 269 return -EIO; 270 } 271 272 usbhs_write(priv, reg, UPPHUB(upphub) | 273 HUBPORT(hubport)| 274 USBSPD(usbspd)); 275 276 return 0; 277 } 278 279 /* 280 * interrupt functions 281 */ 282 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) 283 { 284 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); 285 286 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); 287 } 288 289 /* 290 * local functions 291 */ 292 static void usbhsc_set_buswait(struct usbhs_priv *priv) 293 { 294 int wait = usbhs_get_dparam(priv, buswait_bwait); 295 296 /* set bus wait if platform have */ 297 if (wait) 298 usbhs_bset(priv, BUSWAIT, 0x000F, wait); 299 } 300 301 /* 302 * platform default param 303 */ 304 305 /* commonly used on old SH-Mobile SoCs */ 306 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { 307 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 308 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), 309 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), 310 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), 311 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), 312 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 313 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 314 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 315 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 316 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), 317 }; 318 319 /* commonly used on newer SH-Mobile and R-Car SoCs */ 320 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { 321 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 322 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 323 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 324 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 325 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 326 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 327 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 328 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 329 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 330 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), 331 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), 332 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), 333 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), 334 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), 335 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), 336 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), 337 }; 338 339 /* 340 * power control 341 */ 342 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) 343 { 344 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 345 struct device *dev = usbhs_priv_to_dev(priv); 346 347 if (enable) { 348 /* enable PM */ 349 pm_runtime_get_sync(dev); 350 351 /* enable platform power */ 352 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 353 354 /* USB on */ 355 usbhs_sys_clock_ctrl(priv, enable); 356 } else { 357 /* USB off */ 358 usbhs_sys_clock_ctrl(priv, enable); 359 360 /* disable platform power */ 361 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 362 363 /* disable PM */ 364 pm_runtime_put_sync(dev); 365 } 366 } 367 368 /* 369 * hotplug 370 */ 371 static void usbhsc_hotplug(struct usbhs_priv *priv) 372 { 373 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 374 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 375 int id; 376 int enable; 377 int cable; 378 int ret; 379 380 /* 381 * get vbus status from platform 382 */ 383 enable = usbhs_platform_call(priv, get_vbus, pdev); 384 385 /* 386 * get id from platform 387 */ 388 id = usbhs_platform_call(priv, get_id, pdev); 389 390 if (enable && !mod) { 391 if (priv->edev) { 392 cable = extcon_get_cable_state_(priv->edev, EXTCON_USB_HOST); 393 if ((cable > 0 && id != USBHS_HOST) || 394 (!cable && id != USBHS_GADGET)) { 395 dev_info(&pdev->dev, 396 "USB cable plugged in doesn't match the selected role!\n"); 397 return; 398 } 399 } 400 401 ret = usbhs_mod_change(priv, id); 402 if (ret < 0) 403 return; 404 405 dev_dbg(&pdev->dev, "%s enable\n", __func__); 406 407 /* power on */ 408 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 409 usbhsc_power_ctrl(priv, enable); 410 411 /* bus init */ 412 usbhsc_set_buswait(priv); 413 usbhsc_bus_init(priv); 414 415 /* module start */ 416 usbhs_mod_call(priv, start, priv); 417 418 } else if (!enable && mod) { 419 dev_dbg(&pdev->dev, "%s disable\n", __func__); 420 421 /* module stop */ 422 usbhs_mod_call(priv, stop, priv); 423 424 /* bus init */ 425 usbhsc_bus_init(priv); 426 427 /* power off */ 428 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 429 usbhsc_power_ctrl(priv, enable); 430 431 usbhs_mod_change(priv, -1); 432 433 /* reset phy for next connection */ 434 usbhs_platform_call(priv, phy_reset, pdev); 435 } 436 } 437 438 /* 439 * notify hotplug 440 */ 441 static void usbhsc_notify_hotplug(struct work_struct *work) 442 { 443 struct usbhs_priv *priv = container_of(work, 444 struct usbhs_priv, 445 notify_hotplug_work.work); 446 usbhsc_hotplug(priv); 447 } 448 449 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev) 450 { 451 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 452 int delay = usbhs_get_dparam(priv, detection_delay); 453 454 /* 455 * This functions will be called in interrupt. 456 * To make sure safety context, 457 * use workqueue for usbhs_notify_hotplug 458 */ 459 schedule_delayed_work(&priv->notify_hotplug_work, 460 msecs_to_jiffies(delay)); 461 return 0; 462 } 463 464 /* 465 * platform functions 466 */ 467 static const struct of_device_id usbhs_of_match[] = { 468 { 469 .compatible = "renesas,usbhs-r8a7790", 470 .data = (void *)USBHS_TYPE_RCAR_GEN2, 471 }, 472 { 473 .compatible = "renesas,usbhs-r8a7791", 474 .data = (void *)USBHS_TYPE_RCAR_GEN2, 475 }, 476 { 477 .compatible = "renesas,usbhs-r8a7794", 478 .data = (void *)USBHS_TYPE_RCAR_GEN2, 479 }, 480 { 481 .compatible = "renesas,usbhs-r8a7795", 482 .data = (void *)USBHS_TYPE_RCAR_GEN3, 483 }, 484 { 485 .compatible = "renesas,usbhs-r8a7796", 486 .data = (void *)USBHS_TYPE_RCAR_GEN3, 487 }, 488 { 489 .compatible = "renesas,rcar-gen2-usbhs", 490 .data = (void *)USBHS_TYPE_RCAR_GEN2, 491 }, 492 { 493 .compatible = "renesas,rcar-gen3-usbhs", 494 .data = (void *)USBHS_TYPE_RCAR_GEN3, 495 }, 496 { }, 497 }; 498 MODULE_DEVICE_TABLE(of, usbhs_of_match); 499 500 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev) 501 { 502 struct renesas_usbhs_platform_info *info; 503 struct renesas_usbhs_driver_param *dparam; 504 const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev); 505 u32 tmp; 506 int gpio; 507 508 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); 509 if (!info) 510 return NULL; 511 512 dparam = &info->driver_param; 513 dparam->type = of_id ? (uintptr_t)of_id->data : 0; 514 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp)) 515 dparam->buswait_bwait = tmp; 516 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0, 517 NULL); 518 if (gpio > 0) 519 dparam->enable_gpio = gpio; 520 521 if (dparam->type == USBHS_TYPE_RCAR_GEN2 || 522 dparam->type == USBHS_TYPE_RCAR_GEN3) 523 dparam->has_usb_dmac = 1; 524 525 return info; 526 } 527 528 static int usbhs_probe(struct platform_device *pdev) 529 { 530 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev); 531 struct renesas_usbhs_driver_callback *dfunc; 532 struct usbhs_priv *priv; 533 struct resource *res, *irq_res; 534 int ret; 535 536 /* check device node */ 537 if (pdev->dev.of_node) 538 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev); 539 540 /* check platform information */ 541 if (!info) { 542 dev_err(&pdev->dev, "no platform information\n"); 543 return -EINVAL; 544 } 545 546 /* platform data */ 547 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 548 if (!irq_res) { 549 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n"); 550 return -ENODEV; 551 } 552 553 /* usb private data */ 554 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 555 if (!priv) 556 return -ENOMEM; 557 558 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 559 priv->base = devm_ioremap_resource(&pdev->dev, res); 560 if (IS_ERR(priv->base)) 561 return PTR_ERR(priv->base); 562 563 if (of_property_read_bool(pdev->dev.of_node, "extcon")) { 564 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0); 565 if (IS_ERR(priv->edev)) 566 return PTR_ERR(priv->edev); 567 } 568 569 /* 570 * care platform info 571 */ 572 573 memcpy(&priv->dparam, 574 &info->driver_param, 575 sizeof(struct renesas_usbhs_driver_param)); 576 577 switch (priv->dparam.type) { 578 case USBHS_TYPE_RCAR_GEN2: 579 priv->pfunc = usbhs_rcar2_ops; 580 if (!priv->dparam.pipe_configs) { 581 priv->dparam.pipe_configs = usbhsc_new_pipe; 582 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 583 } 584 break; 585 case USBHS_TYPE_RCAR_GEN3: 586 priv->pfunc = usbhs_rcar3_ops; 587 if (!priv->dparam.pipe_configs) { 588 priv->dparam.pipe_configs = usbhsc_new_pipe; 589 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 590 } 591 break; 592 default: 593 if (!info->platform_callback.get_id) { 594 dev_err(&pdev->dev, "no platform callbacks"); 595 return -EINVAL; 596 } 597 memcpy(&priv->pfunc, 598 &info->platform_callback, 599 sizeof(struct renesas_usbhs_platform_callback)); 600 break; 601 } 602 603 /* set driver callback functions for platform */ 604 dfunc = &info->driver_callback; 605 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug; 606 607 /* set default param if platform doesn't have */ 608 if (!priv->dparam.pipe_configs) { 609 priv->dparam.pipe_configs = usbhsc_default_pipe; 610 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); 611 } 612 if (!priv->dparam.pio_dma_border) 613 priv->dparam.pio_dma_border = 64; /* 64byte */ 614 615 /* FIXME */ 616 /* runtime power control ? */ 617 if (priv->pfunc.get_vbus) 618 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL); 619 620 /* 621 * priv settings 622 */ 623 priv->irq = irq_res->start; 624 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE) 625 priv->irqflags = IRQF_SHARED; 626 priv->pdev = pdev; 627 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); 628 spin_lock_init(usbhs_priv_to_lock(priv)); 629 630 /* call pipe and module init */ 631 ret = usbhs_pipe_probe(priv); 632 if (ret < 0) 633 return ret; 634 635 ret = usbhs_fifo_probe(priv); 636 if (ret < 0) 637 goto probe_end_pipe_exit; 638 639 ret = usbhs_mod_probe(priv); 640 if (ret < 0) 641 goto probe_end_fifo_exit; 642 643 /* dev_set_drvdata should be called after usbhs_mod_init */ 644 platform_set_drvdata(pdev, priv); 645 646 /* 647 * deviece reset here because 648 * USB device might be used in boot loader. 649 */ 650 usbhs_sys_clock_ctrl(priv, 0); 651 652 /* check GPIO determining if USB function should be enabled */ 653 if (priv->dparam.enable_gpio) { 654 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL); 655 ret = !gpio_get_value(priv->dparam.enable_gpio); 656 gpio_free(priv->dparam.enable_gpio); 657 if (ret) { 658 dev_warn(&pdev->dev, 659 "USB function not selected (GPIO %d)\n", 660 priv->dparam.enable_gpio); 661 ret = -ENOTSUPP; 662 goto probe_end_mod_exit; 663 } 664 } 665 666 /* 667 * platform call 668 * 669 * USB phy setup might depend on CPU/Board. 670 * If platform has its callback functions, 671 * call it here. 672 */ 673 ret = usbhs_platform_call(priv, hardware_init, pdev); 674 if (ret < 0) { 675 dev_err(&pdev->dev, "platform init failed.\n"); 676 goto probe_end_mod_exit; 677 } 678 679 /* reset phy for connection */ 680 usbhs_platform_call(priv, phy_reset, pdev); 681 682 /* power control */ 683 pm_runtime_enable(&pdev->dev); 684 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { 685 usbhsc_power_ctrl(priv, 1); 686 usbhs_mod_autonomy_mode(priv); 687 } 688 689 /* 690 * manual call notify_hotplug for cold plug 691 */ 692 usbhsc_drvcllbck_notify_hotplug(pdev); 693 694 dev_info(&pdev->dev, "probed\n"); 695 696 return ret; 697 698 probe_end_mod_exit: 699 usbhs_mod_remove(priv); 700 probe_end_fifo_exit: 701 usbhs_fifo_remove(priv); 702 probe_end_pipe_exit: 703 usbhs_pipe_remove(priv); 704 705 dev_info(&pdev->dev, "probe failed (%d)\n", ret); 706 707 return ret; 708 } 709 710 static int usbhs_remove(struct platform_device *pdev) 711 { 712 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 713 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev); 714 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback; 715 716 dev_dbg(&pdev->dev, "usb remove\n"); 717 718 dfunc->notify_hotplug = NULL; 719 720 /* power off */ 721 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 722 usbhsc_power_ctrl(priv, 0); 723 724 pm_runtime_disable(&pdev->dev); 725 726 usbhs_platform_call(priv, hardware_exit, pdev); 727 usbhs_mod_remove(priv); 728 usbhs_fifo_remove(priv); 729 usbhs_pipe_remove(priv); 730 731 return 0; 732 } 733 734 static int usbhsc_suspend(struct device *dev) 735 { 736 struct usbhs_priv *priv = dev_get_drvdata(dev); 737 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 738 739 if (mod) { 740 usbhs_mod_call(priv, stop, priv); 741 usbhs_mod_change(priv, -1); 742 } 743 744 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 745 usbhsc_power_ctrl(priv, 0); 746 747 return 0; 748 } 749 750 static int usbhsc_resume(struct device *dev) 751 { 752 struct usbhs_priv *priv = dev_get_drvdata(dev); 753 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 754 755 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 756 usbhsc_power_ctrl(priv, 1); 757 758 usbhs_platform_call(priv, phy_reset, pdev); 759 760 usbhsc_drvcllbck_notify_hotplug(pdev); 761 762 return 0; 763 } 764 765 static int usbhsc_runtime_nop(struct device *dev) 766 { 767 /* Runtime PM callback shared between ->runtime_suspend() 768 * and ->runtime_resume(). Simply returns success. 769 * 770 * This driver re-initializes all registers after 771 * pm_runtime_get_sync() anyway so there is no need 772 * to save and restore registers here. 773 */ 774 return 0; 775 } 776 777 static const struct dev_pm_ops usbhsc_pm_ops = { 778 .suspend = usbhsc_suspend, 779 .resume = usbhsc_resume, 780 .runtime_suspend = usbhsc_runtime_nop, 781 .runtime_resume = usbhsc_runtime_nop, 782 }; 783 784 static struct platform_driver renesas_usbhs_driver = { 785 .driver = { 786 .name = "renesas_usbhs", 787 .pm = &usbhsc_pm_ops, 788 .of_match_table = of_match_ptr(usbhs_of_match), 789 }, 790 .probe = usbhs_probe, 791 .remove = usbhs_remove, 792 }; 793 794 module_platform_driver(renesas_usbhs_driver); 795 796 MODULE_LICENSE("GPL"); 797 MODULE_DESCRIPTION("Renesas USB driver"); 798 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 799