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/clk.h> 9 #include <linux/err.h> 10 #include <linux/gpio.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/of_device.h> 14 #include <linux/of_gpio.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/reset.h> 17 #include <linux/slab.h> 18 #include <linux/sysfs.h> 19 #include "common.h" 20 #include "rcar2.h" 21 #include "rcar3.h" 22 #include "rza.h" 23 24 /* 25 * image of renesas_usbhs 26 * 27 * ex) gadget case 28 29 * mod.c 30 * mod_gadget.c 31 * mod_host.c pipe.c fifo.c 32 * 33 * +-------+ +-----------+ 34 * | pipe0 |------>| fifo pio | 35 * +------------+ +-------+ +-----------+ 36 * | mod_gadget |=====> | pipe1 |--+ 37 * +------------+ +-------+ | +-----------+ 38 * | pipe2 | | +-| fifo dma0 | 39 * +------------+ +-------+ | | +-----------+ 40 * | mod_host | | pipe3 |<-|--+ 41 * +------------+ +-------+ | +-----------+ 42 * | .... | +--->| fifo dma1 | 43 * | .... | +-----------+ 44 */ 45 46 47 #define USBHSF_RUNTIME_PWCTRL (1 << 0) 48 49 /* status */ 50 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0) 51 #define usbhsc_flags_set(p, b) ((p)->flags |= (b)) 52 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b)) 53 #define usbhsc_flags_has(p, b) ((p)->flags & (b)) 54 55 /* 56 * platform call back 57 * 58 * renesas usb support platform callback function. 59 * Below macro call it. 60 * if platform doesn't have callback, it return 0 (no error) 61 */ 62 #define usbhs_platform_call(priv, func, args...)\ 63 (!(priv) ? -ENODEV : \ 64 !((priv)->pfunc.func) ? 0 : \ 65 (priv)->pfunc.func(args)) 66 67 /* 68 * common functions 69 */ 70 u16 usbhs_read(struct usbhs_priv *priv, u32 reg) 71 { 72 return ioread16(priv->base + reg); 73 } 74 75 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) 76 { 77 iowrite16(data, priv->base + reg); 78 } 79 80 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) 81 { 82 u16 val = usbhs_read(priv, reg); 83 84 val &= ~mask; 85 val |= data & mask; 86 87 usbhs_write(priv, reg, val); 88 } 89 90 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) 91 { 92 return dev_get_drvdata(&pdev->dev); 93 } 94 95 /* 96 * syscfg functions 97 */ 98 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) 99 { 100 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); 101 } 102 103 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) 104 { 105 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 106 u16 val = DCFM | DRPD | HSE | USBE; 107 int has_otg = usbhs_get_dparam(priv, has_otg); 108 109 if (has_otg) 110 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN)); 111 112 /* 113 * if enable 114 * 115 * - select Host mode 116 * - D+ Line/D- Line Pull-down 117 */ 118 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 119 } 120 121 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) 122 { 123 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 124 u16 val = HSE | USBE; 125 126 /* 127 * if enable 128 * 129 * - select Function mode 130 * - D+ Line Pull-up is disabled 131 * When D+ Line Pull-up is enabled, 132 * calling usbhs_sys_function_pullup(,1) 133 */ 134 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 135 } 136 137 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) 138 { 139 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); 140 } 141 142 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) 143 { 144 usbhs_write(priv, TESTMODE, mode); 145 } 146 147 /* 148 * frame functions 149 */ 150 int usbhs_frame_get_num(struct usbhs_priv *priv) 151 { 152 return usbhs_read(priv, FRMNUM) & FRNM_MASK; 153 } 154 155 /* 156 * usb request functions 157 */ 158 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 159 { 160 u16 val; 161 162 val = usbhs_read(priv, USBREQ); 163 req->bRequest = (val >> 8) & 0xFF; 164 req->bRequestType = (val >> 0) & 0xFF; 165 166 req->wValue = usbhs_read(priv, USBVAL); 167 req->wIndex = usbhs_read(priv, USBINDX); 168 req->wLength = usbhs_read(priv, USBLENG); 169 } 170 171 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 172 { 173 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); 174 usbhs_write(priv, USBVAL, req->wValue); 175 usbhs_write(priv, USBINDX, req->wIndex); 176 usbhs_write(priv, USBLENG, req->wLength); 177 178 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); 179 } 180 181 /* 182 * bus/vbus functions 183 */ 184 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) 185 { 186 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); 187 188 if (status != USBRST) { 189 struct device *dev = usbhs_priv_to_dev(priv); 190 dev_err(dev, "usbhs should be reset\n"); 191 } 192 193 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); 194 } 195 196 void usbhs_bus_send_reset(struct usbhs_priv *priv) 197 { 198 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); 199 } 200 201 int usbhs_bus_get_speed(struct usbhs_priv *priv) 202 { 203 u16 dvstctr = usbhs_read(priv, DVSTCTR); 204 205 switch (RHST & dvstctr) { 206 case RHST_LOW_SPEED: 207 return USB_SPEED_LOW; 208 case RHST_FULL_SPEED: 209 return USB_SPEED_FULL; 210 case RHST_HIGH_SPEED: 211 return USB_SPEED_HIGH; 212 } 213 214 return USB_SPEED_UNKNOWN; 215 } 216 217 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) 218 { 219 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 220 221 return usbhs_platform_call(priv, set_vbus, pdev, enable); 222 } 223 224 static void usbhsc_bus_init(struct usbhs_priv *priv) 225 { 226 usbhs_write(priv, DVSTCTR, 0); 227 228 usbhs_vbus_ctrl(priv, 0); 229 } 230 231 /* 232 * device configuration 233 */ 234 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, 235 u16 upphub, u16 hubport, u16 speed) 236 { 237 struct device *dev = usbhs_priv_to_dev(priv); 238 u16 usbspd = 0; 239 u32 reg = DEVADD0 + (2 * devnum); 240 241 if (devnum > 10) { 242 dev_err(dev, "cannot set speed to unknown device %d\n", devnum); 243 return -EIO; 244 } 245 246 if (upphub > 0xA) { 247 dev_err(dev, "unsupported hub number %d\n", upphub); 248 return -EIO; 249 } 250 251 switch (speed) { 252 case USB_SPEED_LOW: 253 usbspd = USBSPD_SPEED_LOW; 254 break; 255 case USB_SPEED_FULL: 256 usbspd = USBSPD_SPEED_FULL; 257 break; 258 case USB_SPEED_HIGH: 259 usbspd = USBSPD_SPEED_HIGH; 260 break; 261 default: 262 dev_err(dev, "unsupported speed %d\n", speed); 263 return -EIO; 264 } 265 266 usbhs_write(priv, reg, UPPHUB(upphub) | 267 HUBPORT(hubport)| 268 USBSPD(usbspd)); 269 270 return 0; 271 } 272 273 /* 274 * interrupt functions 275 */ 276 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) 277 { 278 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); 279 280 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); 281 } 282 283 /* 284 * local functions 285 */ 286 static void usbhsc_set_buswait(struct usbhs_priv *priv) 287 { 288 int wait = usbhs_get_dparam(priv, buswait_bwait); 289 290 /* set bus wait if platform have */ 291 if (wait) 292 usbhs_bset(priv, BUSWAIT, 0x000F, wait); 293 } 294 295 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) 296 { 297 if (priv->dparam.type == USBHS_TYPE_RCAR_GEN3 || 298 priv->dparam.type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) 299 return true; 300 301 return false; 302 } 303 304 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) 305 { 306 if (!usbhsc_is_multi_clks(priv)) 307 return 0; 308 309 /* The first clock should exist */ 310 priv->clks[0] = of_clk_get(dev->of_node, 0); 311 if (IS_ERR(priv->clks[0])) 312 return PTR_ERR(priv->clks[0]); 313 314 /* 315 * To backward compatibility with old DT, this driver checks the return 316 * value if it's -ENOENT or not. 317 */ 318 priv->clks[1] = of_clk_get(dev->of_node, 1); 319 if (PTR_ERR(priv->clks[1]) == -ENOENT) 320 priv->clks[1] = NULL; 321 else if (IS_ERR(priv->clks[1])) 322 return PTR_ERR(priv->clks[1]); 323 324 return 0; 325 } 326 327 static void usbhsc_clk_put(struct usbhs_priv *priv) 328 { 329 int i; 330 331 if (!usbhsc_is_multi_clks(priv)) 332 return; 333 334 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 335 clk_put(priv->clks[i]); 336 } 337 338 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) 339 { 340 int i, ret; 341 342 if (!usbhsc_is_multi_clks(priv)) 343 return 0; 344 345 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { 346 ret = clk_prepare_enable(priv->clks[i]); 347 if (ret) { 348 while (--i >= 0) 349 clk_disable_unprepare(priv->clks[i]); 350 return ret; 351 } 352 } 353 354 return ret; 355 } 356 357 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) 358 { 359 int i; 360 361 if (!usbhsc_is_multi_clks(priv)) 362 return; 363 364 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 365 clk_disable_unprepare(priv->clks[i]); 366 } 367 368 /* 369 * platform default param 370 */ 371 372 /* commonly used on old SH-Mobile SoCs */ 373 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { 374 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 375 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), 376 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), 377 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), 378 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), 379 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 380 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 381 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 382 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 383 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), 384 }; 385 386 /* commonly used on newer SH-Mobile and R-Car SoCs */ 387 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { 388 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 389 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 390 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 391 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 392 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 393 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 394 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 395 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 396 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 397 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), 398 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), 399 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), 400 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), 401 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), 402 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), 403 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), 404 }; 405 406 /* 407 * power control 408 */ 409 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) 410 { 411 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 412 struct device *dev = usbhs_priv_to_dev(priv); 413 414 if (enable) { 415 /* enable PM */ 416 pm_runtime_get_sync(dev); 417 418 /* enable clks */ 419 if (usbhsc_clk_prepare_enable(priv)) 420 return; 421 422 /* enable platform power */ 423 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 424 425 /* USB on */ 426 usbhs_sys_clock_ctrl(priv, enable); 427 } else { 428 /* USB off */ 429 usbhs_sys_clock_ctrl(priv, enable); 430 431 /* disable platform power */ 432 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 433 434 /* disable clks */ 435 usbhsc_clk_disable_unprepare(priv); 436 437 /* disable PM */ 438 pm_runtime_put_sync(dev); 439 } 440 } 441 442 /* 443 * hotplug 444 */ 445 static void usbhsc_hotplug(struct usbhs_priv *priv) 446 { 447 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 448 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 449 int id; 450 int enable; 451 int cable; 452 int ret; 453 454 /* 455 * get vbus status from platform 456 */ 457 enable = usbhs_platform_call(priv, get_vbus, pdev); 458 459 /* 460 * get id from platform 461 */ 462 id = usbhs_platform_call(priv, get_id, pdev); 463 464 if (enable && !mod) { 465 if (priv->edev) { 466 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); 467 if ((cable > 0 && id != USBHS_HOST) || 468 (!cable && id != USBHS_GADGET)) { 469 dev_info(&pdev->dev, 470 "USB cable plugged in doesn't match the selected role!\n"); 471 return; 472 } 473 } 474 475 ret = usbhs_mod_change(priv, id); 476 if (ret < 0) 477 return; 478 479 dev_dbg(&pdev->dev, "%s enable\n", __func__); 480 481 /* power on */ 482 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 483 usbhsc_power_ctrl(priv, enable); 484 485 /* bus init */ 486 usbhsc_set_buswait(priv); 487 usbhsc_bus_init(priv); 488 489 /* module start */ 490 usbhs_mod_call(priv, start, priv); 491 492 } else if (!enable && mod) { 493 dev_dbg(&pdev->dev, "%s disable\n", __func__); 494 495 /* module stop */ 496 usbhs_mod_call(priv, stop, priv); 497 498 /* bus init */ 499 usbhsc_bus_init(priv); 500 501 /* power off */ 502 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 503 usbhsc_power_ctrl(priv, enable); 504 505 usbhs_mod_change(priv, -1); 506 507 /* reset phy for next connection */ 508 usbhs_platform_call(priv, phy_reset, pdev); 509 } 510 } 511 512 /* 513 * notify hotplug 514 */ 515 static void usbhsc_notify_hotplug(struct work_struct *work) 516 { 517 struct usbhs_priv *priv = container_of(work, 518 struct usbhs_priv, 519 notify_hotplug_work.work); 520 usbhsc_hotplug(priv); 521 } 522 523 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev) 524 { 525 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 526 int delay = usbhs_get_dparam(priv, detection_delay); 527 528 /* 529 * This functions will be called in interrupt. 530 * To make sure safety context, 531 * use workqueue for usbhs_notify_hotplug 532 */ 533 schedule_delayed_work(&priv->notify_hotplug_work, 534 msecs_to_jiffies(delay)); 535 return 0; 536 } 537 538 /* 539 * platform functions 540 */ 541 static const struct of_device_id usbhs_of_match[] = { 542 { 543 .compatible = "renesas,usbhs-r8a7790", 544 .data = (void *)USBHS_TYPE_RCAR_GEN2, 545 }, 546 { 547 .compatible = "renesas,usbhs-r8a7791", 548 .data = (void *)USBHS_TYPE_RCAR_GEN2, 549 }, 550 { 551 .compatible = "renesas,usbhs-r8a7794", 552 .data = (void *)USBHS_TYPE_RCAR_GEN2, 553 }, 554 { 555 .compatible = "renesas,usbhs-r8a7795", 556 .data = (void *)USBHS_TYPE_RCAR_GEN3, 557 }, 558 { 559 .compatible = "renesas,usbhs-r8a7796", 560 .data = (void *)USBHS_TYPE_RCAR_GEN3, 561 }, 562 { 563 .compatible = "renesas,usbhs-r8a77990", 564 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL, 565 }, 566 { 567 .compatible = "renesas,usbhs-r8a77995", 568 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL, 569 }, 570 { 571 .compatible = "renesas,rcar-gen2-usbhs", 572 .data = (void *)USBHS_TYPE_RCAR_GEN2, 573 }, 574 { 575 .compatible = "renesas,rcar-gen3-usbhs", 576 .data = (void *)USBHS_TYPE_RCAR_GEN3, 577 }, 578 { 579 .compatible = "renesas,rza1-usbhs", 580 .data = (void *)USBHS_TYPE_RZA1, 581 }, 582 { }, 583 }; 584 MODULE_DEVICE_TABLE(of, usbhs_of_match); 585 586 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev) 587 { 588 struct renesas_usbhs_platform_info *info; 589 struct renesas_usbhs_driver_param *dparam; 590 u32 tmp; 591 int gpio; 592 593 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); 594 if (!info) 595 return NULL; 596 597 dparam = &info->driver_param; 598 dparam->type = (uintptr_t)of_device_get_match_data(dev); 599 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp)) 600 dparam->buswait_bwait = tmp; 601 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0, 602 NULL); 603 if (gpio > 0) 604 dparam->enable_gpio = gpio; 605 606 if (dparam->type == USBHS_TYPE_RCAR_GEN2 || 607 dparam->type == USBHS_TYPE_RCAR_GEN3 || 608 dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) { 609 dparam->has_usb_dmac = 1; 610 dparam->pipe_configs = usbhsc_new_pipe; 611 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 612 } 613 614 if (dparam->type == USBHS_TYPE_RZA1) { 615 dparam->pipe_configs = usbhsc_new_pipe; 616 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 617 } 618 619 return info; 620 } 621 622 static int usbhs_probe(struct platform_device *pdev) 623 { 624 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev); 625 struct renesas_usbhs_driver_callback *dfunc; 626 struct usbhs_priv *priv; 627 struct resource *res, *irq_res; 628 int ret; 629 630 /* check device node */ 631 if (pdev->dev.of_node) 632 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev); 633 634 /* check platform information */ 635 if (!info) { 636 dev_err(&pdev->dev, "no platform information\n"); 637 return -EINVAL; 638 } 639 640 /* platform data */ 641 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 642 if (!irq_res) { 643 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n"); 644 return -ENODEV; 645 } 646 647 /* usb private data */ 648 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 649 if (!priv) 650 return -ENOMEM; 651 652 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 653 priv->base = devm_ioremap_resource(&pdev->dev, res); 654 if (IS_ERR(priv->base)) 655 return PTR_ERR(priv->base); 656 657 if (of_property_read_bool(pdev->dev.of_node, "extcon")) { 658 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0); 659 if (IS_ERR(priv->edev)) 660 return PTR_ERR(priv->edev); 661 } 662 663 priv->rsts = devm_reset_control_array_get_optional_shared(&pdev->dev); 664 if (IS_ERR(priv->rsts)) 665 return PTR_ERR(priv->rsts); 666 667 /* 668 * care platform info 669 */ 670 671 memcpy(&priv->dparam, 672 &info->driver_param, 673 sizeof(struct renesas_usbhs_driver_param)); 674 675 switch (priv->dparam.type) { 676 case USBHS_TYPE_RCAR_GEN2: 677 priv->pfunc = usbhs_rcar2_ops; 678 break; 679 case USBHS_TYPE_RCAR_GEN3: 680 priv->pfunc = usbhs_rcar3_ops; 681 break; 682 case USBHS_TYPE_RCAR_GEN3_WITH_PLL: 683 priv->pfunc = usbhs_rcar3_with_pll_ops; 684 break; 685 case USBHS_TYPE_RZA1: 686 priv->pfunc = usbhs_rza1_ops; 687 break; 688 default: 689 if (!info->platform_callback.get_id) { 690 dev_err(&pdev->dev, "no platform callbacks"); 691 return -EINVAL; 692 } 693 memcpy(&priv->pfunc, 694 &info->platform_callback, 695 sizeof(struct renesas_usbhs_platform_callback)); 696 break; 697 } 698 699 /* set driver callback functions for platform */ 700 dfunc = &info->driver_callback; 701 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug; 702 703 /* set default param if platform doesn't have */ 704 if (!priv->dparam.pipe_configs) { 705 priv->dparam.pipe_configs = usbhsc_default_pipe; 706 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); 707 } 708 if (!priv->dparam.pio_dma_border) 709 priv->dparam.pio_dma_border = 64; /* 64byte */ 710 711 /* FIXME */ 712 /* runtime power control ? */ 713 if (priv->pfunc.get_vbus) 714 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL); 715 716 /* 717 * priv settings 718 */ 719 priv->irq = irq_res->start; 720 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE) 721 priv->irqflags = IRQF_SHARED; 722 priv->pdev = pdev; 723 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); 724 spin_lock_init(usbhs_priv_to_lock(priv)); 725 726 /* call pipe and module init */ 727 ret = usbhs_pipe_probe(priv); 728 if (ret < 0) 729 return ret; 730 731 ret = usbhs_fifo_probe(priv); 732 if (ret < 0) 733 goto probe_end_pipe_exit; 734 735 ret = usbhs_mod_probe(priv); 736 if (ret < 0) 737 goto probe_end_fifo_exit; 738 739 /* dev_set_drvdata should be called after usbhs_mod_init */ 740 platform_set_drvdata(pdev, priv); 741 742 ret = reset_control_deassert(priv->rsts); 743 if (ret) 744 goto probe_fail_rst; 745 746 ret = usbhsc_clk_get(&pdev->dev, priv); 747 if (ret) 748 goto probe_fail_clks; 749 750 /* 751 * deviece reset here because 752 * USB device might be used in boot loader. 753 */ 754 usbhs_sys_clock_ctrl(priv, 0); 755 756 /* check GPIO determining if USB function should be enabled */ 757 if (priv->dparam.enable_gpio) { 758 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL); 759 ret = !gpio_get_value(priv->dparam.enable_gpio); 760 gpio_free(priv->dparam.enable_gpio); 761 if (ret) { 762 dev_warn(&pdev->dev, 763 "USB function not selected (GPIO %d)\n", 764 priv->dparam.enable_gpio); 765 ret = -ENOTSUPP; 766 goto probe_end_mod_exit; 767 } 768 } 769 770 /* 771 * platform call 772 * 773 * USB phy setup might depend on CPU/Board. 774 * If platform has its callback functions, 775 * call it here. 776 */ 777 ret = usbhs_platform_call(priv, hardware_init, pdev); 778 if (ret < 0) { 779 dev_err(&pdev->dev, "platform init failed.\n"); 780 goto probe_end_mod_exit; 781 } 782 783 /* reset phy for connection */ 784 usbhs_platform_call(priv, phy_reset, pdev); 785 786 /* power control */ 787 pm_runtime_enable(&pdev->dev); 788 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { 789 usbhsc_power_ctrl(priv, 1); 790 usbhs_mod_autonomy_mode(priv); 791 } 792 793 /* 794 * manual call notify_hotplug for cold plug 795 */ 796 usbhsc_drvcllbck_notify_hotplug(pdev); 797 798 dev_info(&pdev->dev, "probed\n"); 799 800 return ret; 801 802 probe_end_mod_exit: 803 usbhsc_clk_put(priv); 804 probe_fail_clks: 805 reset_control_assert(priv->rsts); 806 probe_fail_rst: 807 usbhs_mod_remove(priv); 808 probe_end_fifo_exit: 809 usbhs_fifo_remove(priv); 810 probe_end_pipe_exit: 811 usbhs_pipe_remove(priv); 812 813 dev_info(&pdev->dev, "probe failed (%d)\n", ret); 814 815 return ret; 816 } 817 818 static int usbhs_remove(struct platform_device *pdev) 819 { 820 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 821 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev); 822 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback; 823 824 dev_dbg(&pdev->dev, "usb remove\n"); 825 826 dfunc->notify_hotplug = NULL; 827 828 /* power off */ 829 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 830 usbhsc_power_ctrl(priv, 0); 831 832 pm_runtime_disable(&pdev->dev); 833 834 usbhs_platform_call(priv, hardware_exit, pdev); 835 usbhsc_clk_put(priv); 836 reset_control_assert(priv->rsts); 837 usbhs_mod_remove(priv); 838 usbhs_fifo_remove(priv); 839 usbhs_pipe_remove(priv); 840 841 return 0; 842 } 843 844 static int usbhsc_suspend(struct device *dev) 845 { 846 struct usbhs_priv *priv = dev_get_drvdata(dev); 847 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 848 849 if (mod) { 850 usbhs_mod_call(priv, stop, priv); 851 usbhs_mod_change(priv, -1); 852 } 853 854 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) 855 usbhsc_power_ctrl(priv, 0); 856 857 return 0; 858 } 859 860 static int usbhsc_resume(struct device *dev) 861 { 862 struct usbhs_priv *priv = dev_get_drvdata(dev); 863 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 864 865 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { 866 usbhsc_power_ctrl(priv, 1); 867 usbhs_mod_autonomy_mode(priv); 868 } 869 870 usbhs_platform_call(priv, phy_reset, pdev); 871 872 usbhsc_drvcllbck_notify_hotplug(pdev); 873 874 return 0; 875 } 876 877 static int usbhsc_runtime_nop(struct device *dev) 878 { 879 /* Runtime PM callback shared between ->runtime_suspend() 880 * and ->runtime_resume(). Simply returns success. 881 * 882 * This driver re-initializes all registers after 883 * pm_runtime_get_sync() anyway so there is no need 884 * to save and restore registers here. 885 */ 886 return 0; 887 } 888 889 static const struct dev_pm_ops usbhsc_pm_ops = { 890 .suspend = usbhsc_suspend, 891 .resume = usbhsc_resume, 892 .runtime_suspend = usbhsc_runtime_nop, 893 .runtime_resume = usbhsc_runtime_nop, 894 }; 895 896 static struct platform_driver renesas_usbhs_driver = { 897 .driver = { 898 .name = "renesas_usbhs", 899 .pm = &usbhsc_pm_ops, 900 .of_match_table = of_match_ptr(usbhs_of_match), 901 }, 902 .probe = usbhs_probe, 903 .remove = usbhs_remove, 904 }; 905 906 module_platform_driver(renesas_usbhs_driver); 907 908 MODULE_LICENSE("GPL"); 909 MODULE_DESCRIPTION("Renesas USB driver"); 910 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 911