1 // SPDX-License-Identifier: GPL-1.0+ 2 /* 3 * Renesas USB driver 4 * 5 * Copyright (C) 2011 Renesas Solutions Corp. 6 * Copyright (C) 2019 Renesas Electronics Corporation 7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 8 */ 9 #include <linux/clk.h> 10 #include <linux/err.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/io.h> 13 #include <linux/module.h> 14 #include <linux/of.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 * platform call back 48 * 49 * renesas usb support platform callback function. 50 * Below macro call it. 51 * if platform doesn't have callback, it return 0 (no error) 52 */ 53 #define usbhs_platform_call(priv, func, args...)\ 54 (!(priv) ? -ENODEV : \ 55 !((priv)->pfunc->func) ? 0 : \ 56 (priv)->pfunc->func(args)) 57 58 /* 59 * common functions 60 */ 61 u16 usbhs_read(struct usbhs_priv *priv, u32 reg) 62 { 63 return ioread16(priv->base + reg); 64 } 65 66 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) 67 { 68 iowrite16(data, priv->base + reg); 69 } 70 71 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) 72 { 73 u16 val = usbhs_read(priv, reg); 74 75 val &= ~mask; 76 val |= data & mask; 77 78 usbhs_write(priv, reg, val); 79 } 80 81 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) 82 { 83 return dev_get_drvdata(&pdev->dev); 84 } 85 86 int usbhs_get_id_as_gadget(struct platform_device *pdev) 87 { 88 return USBHS_GADGET; 89 } 90 91 /* 92 * syscfg functions 93 */ 94 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) 95 { 96 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); 97 } 98 99 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) 100 { 101 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 102 u16 val = DCFM | DRPD | HSE | USBE; 103 104 /* 105 * if enable 106 * 107 * - select Host mode 108 * - D+ Line/D- Line Pull-down 109 */ 110 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 111 } 112 113 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) 114 { 115 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; 116 u16 val = HSE | USBE; 117 118 /* CNEN bit is required for function operation */ 119 if (usbhs_get_dparam(priv, has_cnen)) { 120 mask |= CNEN; 121 val |= CNEN; 122 } 123 124 /* 125 * if enable 126 * 127 * - select Function mode 128 * - D+ Line Pull-up is disabled 129 * When D+ Line Pull-up is enabled, 130 * calling usbhs_sys_function_pullup(,1) 131 */ 132 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); 133 } 134 135 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) 136 { 137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); 138 } 139 140 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) 141 { 142 usbhs_write(priv, TESTMODE, mode); 143 } 144 145 /* 146 * frame functions 147 */ 148 int usbhs_frame_get_num(struct usbhs_priv *priv) 149 { 150 return usbhs_read(priv, FRMNUM) & FRNM_MASK; 151 } 152 153 /* 154 * usb request functions 155 */ 156 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 157 { 158 u16 val; 159 160 val = usbhs_read(priv, USBREQ); 161 req->bRequest = (val >> 8) & 0xFF; 162 req->bRequestType = (val >> 0) & 0xFF; 163 164 req->wValue = cpu_to_le16(usbhs_read(priv, USBVAL)); 165 req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX)); 166 req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG)); 167 } 168 169 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) 170 { 171 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); 172 usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue)); 173 usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex)); 174 usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength)); 175 176 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); 177 } 178 179 /* 180 * bus/vbus functions 181 */ 182 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) 183 { 184 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); 185 186 if (status != USBRST) { 187 struct device *dev = usbhs_priv_to_dev(priv); 188 dev_err(dev, "usbhs should be reset\n"); 189 } 190 191 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); 192 } 193 194 void usbhs_bus_send_reset(struct usbhs_priv *priv) 195 { 196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); 197 } 198 199 int usbhs_bus_get_speed(struct usbhs_priv *priv) 200 { 201 u16 dvstctr = usbhs_read(priv, DVSTCTR); 202 203 switch (RHST & dvstctr) { 204 case RHST_LOW_SPEED: 205 return USB_SPEED_LOW; 206 case RHST_FULL_SPEED: 207 return USB_SPEED_FULL; 208 case RHST_HIGH_SPEED: 209 return USB_SPEED_HIGH; 210 } 211 212 return USB_SPEED_UNKNOWN; 213 } 214 215 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) 216 { 217 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 218 219 return usbhs_platform_call(priv, set_vbus, pdev, enable); 220 } 221 222 static void usbhsc_bus_init(struct usbhs_priv *priv) 223 { 224 usbhs_write(priv, DVSTCTR, 0); 225 226 usbhs_vbus_ctrl(priv, 0); 227 } 228 229 /* 230 * device configuration 231 */ 232 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, 233 u16 upphub, u16 hubport, u16 speed) 234 { 235 struct device *dev = usbhs_priv_to_dev(priv); 236 u16 usbspd = 0; 237 u32 reg = DEVADD0 + (2 * devnum); 238 239 if (devnum > 10) { 240 dev_err(dev, "cannot set speed to unknown device %d\n", devnum); 241 return -EIO; 242 } 243 244 if (upphub > 0xA) { 245 dev_err(dev, "unsupported hub number %d\n", upphub); 246 return -EIO; 247 } 248 249 switch (speed) { 250 case USB_SPEED_LOW: 251 usbspd = USBSPD_SPEED_LOW; 252 break; 253 case USB_SPEED_FULL: 254 usbspd = USBSPD_SPEED_FULL; 255 break; 256 case USB_SPEED_HIGH: 257 usbspd = USBSPD_SPEED_HIGH; 258 break; 259 default: 260 dev_err(dev, "unsupported speed %d\n", speed); 261 return -EIO; 262 } 263 264 usbhs_write(priv, reg, UPPHUB(upphub) | 265 HUBPORT(hubport)| 266 USBSPD(usbspd)); 267 268 return 0; 269 } 270 271 /* 272 * interrupt functions 273 */ 274 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) 275 { 276 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); 277 278 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); 279 } 280 281 /* 282 * local functions 283 */ 284 static void usbhsc_set_buswait(struct usbhs_priv *priv) 285 { 286 int wait = usbhs_get_dparam(priv, buswait_bwait); 287 288 /* set bus wait if platform have */ 289 if (wait) 290 usbhs_bset(priv, BUSWAIT, 0x000F, wait); 291 } 292 293 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) 294 { 295 return priv->dparam.multi_clks; 296 } 297 298 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) 299 { 300 if (!usbhsc_is_multi_clks(priv)) 301 return 0; 302 303 /* The first clock should exist */ 304 priv->clks[0] = of_clk_get(dev_of_node(dev), 0); 305 if (IS_ERR(priv->clks[0])) 306 return PTR_ERR(priv->clks[0]); 307 308 /* 309 * To backward compatibility with old DT, this driver checks the return 310 * value if it's -ENOENT or not. 311 */ 312 priv->clks[1] = of_clk_get(dev_of_node(dev), 1); 313 if (PTR_ERR(priv->clks[1]) == -ENOENT) 314 priv->clks[1] = NULL; 315 else if (IS_ERR(priv->clks[1])) { 316 clk_put(priv->clks[0]); 317 return PTR_ERR(priv->clks[1]); 318 } 319 320 return 0; 321 } 322 323 static void usbhsc_clk_put(struct usbhs_priv *priv) 324 { 325 int i; 326 327 if (!usbhsc_is_multi_clks(priv)) 328 return; 329 330 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 331 clk_put(priv->clks[i]); 332 } 333 334 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) 335 { 336 int i, ret; 337 338 if (!usbhsc_is_multi_clks(priv)) 339 return 0; 340 341 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { 342 ret = clk_prepare_enable(priv->clks[i]); 343 if (ret) { 344 while (--i >= 0) 345 clk_disable_unprepare(priv->clks[i]); 346 return ret; 347 } 348 } 349 350 return ret; 351 } 352 353 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) 354 { 355 int i; 356 357 if (!usbhsc_is_multi_clks(priv)) 358 return; 359 360 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 361 clk_disable_unprepare(priv->clks[i]); 362 } 363 364 /* 365 * platform default param 366 */ 367 368 /* commonly used on old SH-Mobile and RZ/G2L family SoCs */ 369 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { 370 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 371 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 372 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 373 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 374 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 375 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 376 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 377 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 378 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 379 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), 380 }; 381 382 /* commonly used on newer SH-Mobile and R-Car SoCs */ 383 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { 384 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 385 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 386 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 387 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 388 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 389 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 390 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 391 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 392 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 393 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), 394 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), 395 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), 396 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), 397 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), 398 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), 399 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), 400 }; 401 402 /* 403 * power control 404 */ 405 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) 406 { 407 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 408 struct device *dev = usbhs_priv_to_dev(priv); 409 410 if (enable) { 411 /* enable PM */ 412 pm_runtime_get_sync(dev); 413 414 /* enable clks */ 415 if (usbhsc_clk_prepare_enable(priv)) 416 return; 417 418 /* enable platform power */ 419 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 420 421 /* USB on */ 422 usbhs_sys_clock_ctrl(priv, enable); 423 } else { 424 /* USB off */ 425 usbhs_sys_clock_ctrl(priv, enable); 426 427 /* disable platform power */ 428 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 429 430 /* disable clks */ 431 usbhsc_clk_disable_unprepare(priv); 432 433 /* disable PM */ 434 pm_runtime_put_sync(dev); 435 } 436 } 437 438 /* 439 * hotplug 440 */ 441 static void usbhsc_hotplug(struct usbhs_priv *priv) 442 { 443 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 444 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 445 int id; 446 int enable; 447 int cable; 448 int ret; 449 450 /* 451 * get vbus status from platform 452 */ 453 enable = usbhs_mod_info_call(priv, get_vbus, pdev); 454 455 /* 456 * get id from platform 457 */ 458 id = usbhs_platform_call(priv, get_id, pdev); 459 460 if (enable && !mod) { 461 if (priv->edev) { 462 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); 463 if ((cable > 0 && id != USBHS_HOST) || 464 (!cable && id != USBHS_GADGET)) { 465 dev_info(&pdev->dev, 466 "USB cable plugged in doesn't match the selected role!\n"); 467 return; 468 } 469 } 470 471 ret = usbhs_mod_change(priv, id); 472 if (ret < 0) 473 return; 474 475 dev_dbg(&pdev->dev, "%s enable\n", __func__); 476 477 /* power on */ 478 if (usbhs_get_dparam(priv, runtime_pwctrl)) 479 usbhsc_power_ctrl(priv, enable); 480 481 /* bus init */ 482 usbhsc_set_buswait(priv); 483 usbhsc_bus_init(priv); 484 485 /* module start */ 486 usbhs_mod_call(priv, start, priv); 487 488 } else if (!enable && mod) { 489 dev_dbg(&pdev->dev, "%s disable\n", __func__); 490 491 /* module stop */ 492 usbhs_mod_call(priv, stop, priv); 493 494 /* bus init */ 495 usbhsc_bus_init(priv); 496 497 /* power off */ 498 if (usbhs_get_dparam(priv, runtime_pwctrl)) 499 usbhsc_power_ctrl(priv, enable); 500 501 usbhs_mod_change(priv, -1); 502 503 /* reset phy for next connection */ 504 usbhs_platform_call(priv, phy_reset, pdev); 505 } 506 } 507 508 /* 509 * notify hotplug 510 */ 511 static void usbhsc_notify_hotplug(struct work_struct *work) 512 { 513 struct usbhs_priv *priv = container_of(work, 514 struct usbhs_priv, 515 notify_hotplug_work.work); 516 usbhsc_hotplug(priv); 517 } 518 519 int usbhsc_schedule_notify_hotplug(struct platform_device *pdev) 520 { 521 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 522 int delay = usbhs_get_dparam(priv, detection_delay); 523 524 /* 525 * This functions will be called in interrupt. 526 * To make sure safety context, 527 * use workqueue for usbhs_notify_hotplug 528 */ 529 schedule_delayed_work(&priv->notify_hotplug_work, 530 msecs_to_jiffies(delay)); 531 return 0; 532 } 533 534 /* 535 * platform functions 536 */ 537 static const struct of_device_id usbhs_of_match[] = { 538 { 539 .compatible = "renesas,usbhs-r8a774c0", 540 .data = &usbhs_rcar_gen3_with_pll_plat_info, 541 }, 542 { 543 .compatible = "renesas,usbhs-r8a7790", 544 .data = &usbhs_rcar_gen2_plat_info, 545 }, 546 { 547 .compatible = "renesas,usbhs-r8a7791", 548 .data = &usbhs_rcar_gen2_plat_info, 549 }, 550 { 551 .compatible = "renesas,usbhs-r8a7794", 552 .data = &usbhs_rcar_gen2_plat_info, 553 }, 554 { 555 .compatible = "renesas,usbhs-r8a7795", 556 .data = &usbhs_rcar_gen3_plat_info, 557 }, 558 { 559 .compatible = "renesas,usbhs-r8a7796", 560 .data = &usbhs_rcar_gen3_plat_info, 561 }, 562 { 563 .compatible = "renesas,usbhs-r8a77990", 564 .data = &usbhs_rcar_gen3_with_pll_plat_info, 565 }, 566 { 567 .compatible = "renesas,usbhs-r8a77995", 568 .data = &usbhs_rcar_gen3_with_pll_plat_info, 569 }, 570 { 571 .compatible = "renesas,usbhs-r9a07g043", 572 .data = &usbhs_rzg2l_plat_info, 573 }, 574 { 575 .compatible = "renesas,usbhs-r9a07g044", 576 .data = &usbhs_rzg2l_plat_info, 577 }, 578 { 579 .compatible = "renesas,usbhs-r9a07g054", 580 .data = &usbhs_rzg2l_plat_info, 581 }, 582 { 583 .compatible = "renesas,rcar-gen2-usbhs", 584 .data = &usbhs_rcar_gen2_plat_info, 585 }, 586 { 587 .compatible = "renesas,rcar-gen3-usbhs", 588 .data = &usbhs_rcar_gen3_plat_info, 589 }, 590 { 591 .compatible = "renesas,rza1-usbhs", 592 .data = &usbhs_rza1_plat_info, 593 }, 594 { 595 .compatible = "renesas,rza2-usbhs", 596 .data = &usbhs_rza2_plat_info, 597 }, 598 { 599 .compatible = "renesas,rzg2l-usbhs", 600 .data = &usbhs_rzg2l_plat_info, 601 }, 602 { } 603 }; 604 MODULE_DEVICE_TABLE(of, usbhs_of_match); 605 606 static int usbhs_probe(struct platform_device *pdev) 607 { 608 const struct renesas_usbhs_platform_info *info; 609 struct usbhs_priv *priv; 610 struct device *dev = &pdev->dev; 611 struct gpio_desc *gpiod; 612 int ret; 613 u32 tmp; 614 int irq; 615 616 info = of_device_get_match_data(dev); 617 if (!info) { 618 info = dev_get_platdata(dev); 619 if (!info) 620 return dev_err_probe(dev, -EINVAL, "no platform info\n"); 621 } 622 623 /* platform data */ 624 irq = platform_get_irq(pdev, 0); 625 if (irq < 0) 626 return irq; 627 628 /* usb private data */ 629 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 630 if (!priv) 631 return -ENOMEM; 632 633 priv->base = devm_platform_ioremap_resource(pdev, 0); 634 if (IS_ERR(priv->base)) 635 return PTR_ERR(priv->base); 636 637 if (of_property_present(dev_of_node(dev), "extcon")) { 638 priv->edev = extcon_get_edev_by_phandle(dev, 0); 639 if (IS_ERR(priv->edev)) 640 return PTR_ERR(priv->edev); 641 } 642 643 priv->rsts = devm_reset_control_array_get_optional_shared(dev); 644 if (IS_ERR(priv->rsts)) 645 return PTR_ERR(priv->rsts); 646 647 /* 648 * care platform info 649 */ 650 651 priv->dparam = info->driver_param; 652 653 if (!info->platform_callback.get_id) { 654 dev_err(dev, "no platform callbacks\n"); 655 return -EINVAL; 656 } 657 priv->pfunc = &info->platform_callback; 658 659 /* set default param if platform doesn't have */ 660 if (usbhs_get_dparam(priv, has_new_pipe_configs)) { 661 priv->dparam.pipe_configs = usbhsc_new_pipe; 662 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 663 } else if (!priv->dparam.pipe_configs) { 664 priv->dparam.pipe_configs = usbhsc_default_pipe; 665 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); 666 } 667 if (!priv->dparam.pio_dma_border) 668 priv->dparam.pio_dma_border = 64; /* 64byte */ 669 if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp)) 670 priv->dparam.buswait_bwait = tmp; 671 gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN); 672 if (IS_ERR(gpiod)) 673 return PTR_ERR(gpiod); 674 675 /* FIXME */ 676 /* runtime power control ? */ 677 if (priv->pfunc->get_vbus) 678 usbhs_get_dparam(priv, runtime_pwctrl) = 1; 679 680 /* 681 * priv settings 682 */ 683 priv->irq = irq; 684 priv->pdev = pdev; 685 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); 686 spin_lock_init(usbhs_priv_to_lock(priv)); 687 688 /* 689 * Acquire clocks and enable power management (PM) early in the 690 * probe process, as the driver accesses registers during 691 * initialization. Ensure the device is active before proceeding. 692 */ 693 pm_runtime_enable(dev); 694 695 ret = usbhsc_clk_get(dev, priv); 696 if (ret) 697 goto probe_pm_disable; 698 699 ret = pm_runtime_resume_and_get(dev); 700 if (ret) 701 goto probe_clk_put; 702 703 ret = usbhsc_clk_prepare_enable(priv); 704 if (ret) 705 goto probe_pm_put; 706 707 /* call pipe and module init */ 708 ret = usbhs_pipe_probe(priv); 709 if (ret < 0) 710 goto probe_clk_dis_unprepare; 711 712 ret = usbhs_fifo_probe(priv); 713 if (ret < 0) 714 goto probe_end_pipe_exit; 715 716 ret = usbhs_mod_probe(priv); 717 if (ret < 0) 718 goto probe_end_fifo_exit; 719 720 /* platform_set_drvdata() should be called after usbhs_mod_probe() */ 721 platform_set_drvdata(pdev, priv); 722 723 ret = reset_control_deassert(priv->rsts); 724 if (ret) 725 goto probe_fail_rst; 726 727 /* 728 * device reset here because 729 * USB device might be used in boot loader. 730 */ 731 usbhs_sys_clock_ctrl(priv, 0); 732 733 /* check GPIO determining if USB function should be enabled */ 734 if (gpiod) { 735 ret = !gpiod_get_value(gpiod); 736 if (ret) { 737 dev_warn(dev, "USB function not selected (GPIO)\n"); 738 ret = -ENOTSUPP; 739 goto probe_assert_rest; 740 } 741 } 742 743 /* 744 * platform call 745 * 746 * USB phy setup might depend on CPU/Board. 747 * If platform has its callback functions, 748 * call it here. 749 */ 750 ret = usbhs_platform_call(priv, hardware_init, pdev); 751 if (ret < 0) { 752 dev_err(dev, "platform init failed.\n"); 753 goto probe_assert_rest; 754 } 755 756 /* reset phy for connection */ 757 usbhs_platform_call(priv, phy_reset, pdev); 758 759 /* 760 * Disable the clocks that were enabled earlier in the probe path, 761 * and let the driver handle the clocks beyond this point. 762 */ 763 usbhsc_clk_disable_unprepare(priv); 764 pm_runtime_put(dev); 765 766 if (!usbhs_get_dparam(priv, runtime_pwctrl)) { 767 usbhsc_power_ctrl(priv, 1); 768 usbhs_mod_autonomy_mode(priv); 769 } else { 770 usbhs_mod_non_autonomy_mode(priv); 771 } 772 773 /* 774 * manual call notify_hotplug for cold plug 775 */ 776 usbhsc_schedule_notify_hotplug(pdev); 777 778 dev_info(dev, "probed\n"); 779 780 return ret; 781 782 probe_assert_rest: 783 reset_control_assert(priv->rsts); 784 probe_fail_rst: 785 usbhs_mod_remove(priv); 786 probe_end_fifo_exit: 787 usbhs_fifo_remove(priv); 788 probe_end_pipe_exit: 789 usbhs_pipe_remove(priv); 790 probe_clk_dis_unprepare: 791 usbhsc_clk_disable_unprepare(priv); 792 probe_pm_put: 793 pm_runtime_put(dev); 794 probe_clk_put: 795 usbhsc_clk_put(priv); 796 probe_pm_disable: 797 pm_runtime_disable(dev); 798 799 dev_info(dev, "probe failed (%d)\n", ret); 800 801 return ret; 802 } 803 804 static void usbhs_remove(struct platform_device *pdev) 805 { 806 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 807 808 dev_dbg(&pdev->dev, "usb remove\n"); 809 810 flush_delayed_work(&priv->notify_hotplug_work); 811 812 /* power off */ 813 if (!usbhs_get_dparam(priv, runtime_pwctrl)) 814 usbhsc_power_ctrl(priv, 0); 815 816 pm_runtime_disable(&pdev->dev); 817 818 usbhs_platform_call(priv, hardware_exit, pdev); 819 usbhsc_clk_put(priv); 820 reset_control_assert(priv->rsts); 821 usbhs_mod_remove(priv); 822 usbhs_fifo_remove(priv); 823 usbhs_pipe_remove(priv); 824 } 825 826 static __maybe_unused int usbhsc_suspend(struct device *dev) 827 { 828 struct usbhs_priv *priv = dev_get_drvdata(dev); 829 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 830 831 if (mod) { 832 usbhs_mod_call(priv, stop, priv); 833 usbhs_mod_change(priv, -1); 834 } 835 836 if (mod || !usbhs_get_dparam(priv, runtime_pwctrl)) 837 usbhsc_power_ctrl(priv, 0); 838 839 return 0; 840 } 841 842 static __maybe_unused int usbhsc_resume(struct device *dev) 843 { 844 struct usbhs_priv *priv = dev_get_drvdata(dev); 845 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 846 847 if (!usbhs_get_dparam(priv, runtime_pwctrl)) { 848 usbhsc_power_ctrl(priv, 1); 849 usbhs_mod_autonomy_mode(priv); 850 } 851 852 usbhs_platform_call(priv, phy_reset, pdev); 853 854 usbhsc_schedule_notify_hotplug(pdev); 855 856 return 0; 857 } 858 859 static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume); 860 861 static struct platform_driver renesas_usbhs_driver = { 862 .driver = { 863 .name = "renesas_usbhs", 864 .pm = &usbhsc_pm_ops, 865 .of_match_table = usbhs_of_match, 866 }, 867 .probe = usbhs_probe, 868 .remove = usbhs_remove, 869 }; 870 871 module_platform_driver(renesas_usbhs_driver); 872 873 MODULE_LICENSE("GPL"); 874 MODULE_DESCRIPTION("Renesas USB driver"); 875 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 876