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 */ usbhs_read(struct usbhs_priv * priv,u32 reg)61 u16 usbhs_read(struct usbhs_priv *priv, u32 reg) 62 { 63 return ioread16(priv->base + reg); 64 } 65 usbhs_write(struct usbhs_priv * priv,u32 reg,u16 data)66 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) 67 { 68 iowrite16(data, priv->base + reg); 69 } 70 usbhs_bset(struct usbhs_priv * priv,u32 reg,u16 mask,u16 data)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 usbhs_pdev_to_priv(struct platform_device * pdev)81 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) 82 { 83 return dev_get_drvdata(&pdev->dev); 84 } 85 usbhs_get_id_as_gadget(struct platform_device * pdev)86 int usbhs_get_id_as_gadget(struct platform_device *pdev) 87 { 88 return USBHS_GADGET; 89 } 90 91 /* 92 * syscfg functions 93 */ usbhs_sys_clock_ctrl(struct usbhs_priv * priv,int enable)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 usbhs_sys_host_ctrl(struct usbhs_priv * priv,int enable)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 usbhs_sys_function_ctrl(struct usbhs_priv * priv,int enable)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 usbhs_sys_function_pullup(struct usbhs_priv * priv,int enable)135 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) 136 { 137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); 138 } 139 usbhs_sys_set_test_mode(struct usbhs_priv * priv,u16 mode)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 */ usbhs_frame_get_num(struct usbhs_priv * priv)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 */ usbhs_usbreq_get_val(struct usbhs_priv * priv,struct usb_ctrlrequest * req)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 usbhs_usbreq_set_val(struct usbhs_priv * priv,struct usb_ctrlrequest * req)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 */ usbhs_bus_send_sof_enable(struct usbhs_priv * priv)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 usbhs_bus_send_reset(struct usbhs_priv * priv)194 void usbhs_bus_send_reset(struct usbhs_priv *priv) 195 { 196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); 197 } 198 usbhs_bus_get_speed(struct usbhs_priv * priv)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 usbhs_vbus_ctrl(struct usbhs_priv * priv,int enable)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 usbhsc_bus_init(struct usbhs_priv * priv)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 */ usbhs_set_device_config(struct usbhs_priv * priv,int devnum,u16 upphub,u16 hubport,u16 speed)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 */ usbhs_xxxsts_clear(struct usbhs_priv * priv,u16 sts_reg,u16 bit)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 */ usbhsc_set_buswait(struct usbhs_priv * priv)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 usbhsc_is_multi_clks(struct usbhs_priv * priv)293 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) 294 { 295 return priv->dparam.multi_clks; 296 } 297 usbhsc_clk_get(struct device * dev,struct usbhs_priv * priv)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 return PTR_ERR(priv->clks[1]); 317 318 return 0; 319 } 320 usbhsc_clk_put(struct usbhs_priv * priv)321 static void usbhsc_clk_put(struct usbhs_priv *priv) 322 { 323 int i; 324 325 if (!usbhsc_is_multi_clks(priv)) 326 return; 327 328 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 329 clk_put(priv->clks[i]); 330 } 331 usbhsc_clk_prepare_enable(struct usbhs_priv * priv)332 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) 333 { 334 int i, ret; 335 336 if (!usbhsc_is_multi_clks(priv)) 337 return 0; 338 339 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { 340 ret = clk_prepare_enable(priv->clks[i]); 341 if (ret) { 342 while (--i >= 0) 343 clk_disable_unprepare(priv->clks[i]); 344 return ret; 345 } 346 } 347 348 return ret; 349 } 350 usbhsc_clk_disable_unprepare(struct usbhs_priv * priv)351 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) 352 { 353 int i; 354 355 if (!usbhsc_is_multi_clks(priv)) 356 return; 357 358 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) 359 clk_disable_unprepare(priv->clks[i]); 360 } 361 362 /* 363 * platform default param 364 */ 365 366 /* commonly used on old SH-Mobile and RZ/G2L family SoCs */ 367 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { 368 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 369 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 370 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 371 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 372 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 373 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 374 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 375 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 376 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 377 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), 378 }; 379 380 /* commonly used on newer SH-Mobile and R-Car SoCs */ 381 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { 382 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), 383 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), 384 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), 385 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), 386 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), 387 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), 388 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), 389 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), 390 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), 391 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), 392 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), 393 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), 394 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), 395 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), 396 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), 397 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), 398 }; 399 400 /* 401 * power control 402 */ usbhsc_power_ctrl(struct usbhs_priv * priv,int enable)403 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) 404 { 405 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 406 struct device *dev = usbhs_priv_to_dev(priv); 407 408 if (enable) { 409 /* enable PM */ 410 pm_runtime_get_sync(dev); 411 412 /* enable clks */ 413 if (usbhsc_clk_prepare_enable(priv)) 414 return; 415 416 /* enable platform power */ 417 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 418 419 /* USB on */ 420 usbhs_sys_clock_ctrl(priv, enable); 421 } else { 422 /* USB off */ 423 usbhs_sys_clock_ctrl(priv, enable); 424 425 /* disable platform power */ 426 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); 427 428 /* disable clks */ 429 usbhsc_clk_disable_unprepare(priv); 430 431 /* disable PM */ 432 pm_runtime_put_sync(dev); 433 } 434 } 435 436 /* 437 * hotplug 438 */ usbhsc_hotplug(struct usbhs_priv * priv)439 static void usbhsc_hotplug(struct usbhs_priv *priv) 440 { 441 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 442 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 443 int id; 444 int enable; 445 int cable; 446 int ret; 447 448 /* 449 * get vbus status from platform 450 */ 451 enable = usbhs_mod_info_call(priv, get_vbus, pdev); 452 453 /* 454 * get id from platform 455 */ 456 id = usbhs_platform_call(priv, get_id, pdev); 457 458 if (enable && !mod) { 459 if (priv->edev) { 460 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); 461 if ((cable > 0 && id != USBHS_HOST) || 462 (!cable && id != USBHS_GADGET)) { 463 dev_info(&pdev->dev, 464 "USB cable plugged in doesn't match the selected role!\n"); 465 return; 466 } 467 } 468 469 ret = usbhs_mod_change(priv, id); 470 if (ret < 0) 471 return; 472 473 dev_dbg(&pdev->dev, "%s enable\n", __func__); 474 475 /* power on */ 476 if (usbhs_get_dparam(priv, runtime_pwctrl)) 477 usbhsc_power_ctrl(priv, enable); 478 479 /* bus init */ 480 usbhsc_set_buswait(priv); 481 usbhsc_bus_init(priv); 482 483 /* module start */ 484 usbhs_mod_call(priv, start, priv); 485 486 } else if (!enable && mod) { 487 dev_dbg(&pdev->dev, "%s disable\n", __func__); 488 489 /* module stop */ 490 usbhs_mod_call(priv, stop, priv); 491 492 /* bus init */ 493 usbhsc_bus_init(priv); 494 495 /* power off */ 496 if (usbhs_get_dparam(priv, runtime_pwctrl)) 497 usbhsc_power_ctrl(priv, enable); 498 499 usbhs_mod_change(priv, -1); 500 501 /* reset phy for next connection */ 502 usbhs_platform_call(priv, phy_reset, pdev); 503 } 504 } 505 506 /* 507 * notify hotplug 508 */ usbhsc_notify_hotplug(struct work_struct * work)509 static void usbhsc_notify_hotplug(struct work_struct *work) 510 { 511 struct usbhs_priv *priv = container_of(work, 512 struct usbhs_priv, 513 notify_hotplug_work.work); 514 usbhsc_hotplug(priv); 515 } 516 usbhsc_schedule_notify_hotplug(struct platform_device * pdev)517 int usbhsc_schedule_notify_hotplug(struct platform_device *pdev) 518 { 519 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 520 int delay = usbhs_get_dparam(priv, detection_delay); 521 522 /* 523 * This functions will be called in interrupt. 524 * To make sure safety context, 525 * use workqueue for usbhs_notify_hotplug 526 */ 527 schedule_delayed_work(&priv->notify_hotplug_work, 528 msecs_to_jiffies(delay)); 529 return 0; 530 } 531 532 /* 533 * platform functions 534 */ 535 static const struct of_device_id usbhs_of_match[] = { 536 { 537 .compatible = "renesas,usbhs-r8a774c0", 538 .data = &usbhs_rcar_gen3_with_pll_plat_info, 539 }, 540 { 541 .compatible = "renesas,usbhs-r8a7790", 542 .data = &usbhs_rcar_gen2_plat_info, 543 }, 544 { 545 .compatible = "renesas,usbhs-r8a7791", 546 .data = &usbhs_rcar_gen2_plat_info, 547 }, 548 { 549 .compatible = "renesas,usbhs-r8a7794", 550 .data = &usbhs_rcar_gen2_plat_info, 551 }, 552 { 553 .compatible = "renesas,usbhs-r8a7795", 554 .data = &usbhs_rcar_gen3_plat_info, 555 }, 556 { 557 .compatible = "renesas,usbhs-r8a7796", 558 .data = &usbhs_rcar_gen3_plat_info, 559 }, 560 { 561 .compatible = "renesas,usbhs-r8a77990", 562 .data = &usbhs_rcar_gen3_with_pll_plat_info, 563 }, 564 { 565 .compatible = "renesas,usbhs-r8a77995", 566 .data = &usbhs_rcar_gen3_with_pll_plat_info, 567 }, 568 { 569 .compatible = "renesas,usbhs-r9a07g043", 570 .data = &usbhs_rzg2l_plat_info, 571 }, 572 { 573 .compatible = "renesas,usbhs-r9a07g044", 574 .data = &usbhs_rzg2l_plat_info, 575 }, 576 { 577 .compatible = "renesas,usbhs-r9a07g054", 578 .data = &usbhs_rzg2l_plat_info, 579 }, 580 { 581 .compatible = "renesas,rcar-gen2-usbhs", 582 .data = &usbhs_rcar_gen2_plat_info, 583 }, 584 { 585 .compatible = "renesas,rcar-gen3-usbhs", 586 .data = &usbhs_rcar_gen3_plat_info, 587 }, 588 { 589 .compatible = "renesas,rza1-usbhs", 590 .data = &usbhs_rza1_plat_info, 591 }, 592 { 593 .compatible = "renesas,rza2-usbhs", 594 .data = &usbhs_rza2_plat_info, 595 }, 596 { 597 .compatible = "renesas,rzg2l-usbhs", 598 .data = &usbhs_rzg2l_plat_info, 599 }, 600 { } 601 }; 602 MODULE_DEVICE_TABLE(of, usbhs_of_match); 603 usbhs_probe(struct platform_device * pdev)604 static int usbhs_probe(struct platform_device *pdev) 605 { 606 const struct renesas_usbhs_platform_info *info; 607 struct usbhs_priv *priv; 608 struct device *dev = &pdev->dev; 609 struct gpio_desc *gpiod; 610 int ret; 611 u32 tmp; 612 int irq; 613 614 info = of_device_get_match_data(dev); 615 if (!info) { 616 info = dev_get_platdata(dev); 617 if (!info) 618 return dev_err_probe(dev, -EINVAL, "no platform info\n"); 619 } 620 621 /* platform data */ 622 irq = platform_get_irq(pdev, 0); 623 if (irq < 0) 624 return irq; 625 626 /* usb private data */ 627 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 628 if (!priv) 629 return -ENOMEM; 630 631 priv->base = devm_platform_ioremap_resource(pdev, 0); 632 if (IS_ERR(priv->base)) 633 return PTR_ERR(priv->base); 634 635 if (of_property_read_bool(dev_of_node(dev), "extcon")) { 636 priv->edev = extcon_get_edev_by_phandle(dev, 0); 637 if (IS_ERR(priv->edev)) 638 return PTR_ERR(priv->edev); 639 } 640 641 priv->rsts = devm_reset_control_array_get_optional_shared(dev); 642 if (IS_ERR(priv->rsts)) 643 return PTR_ERR(priv->rsts); 644 645 /* 646 * care platform info 647 */ 648 649 priv->dparam = info->driver_param; 650 651 if (!info->platform_callback.get_id) { 652 dev_err(dev, "no platform callbacks\n"); 653 return -EINVAL; 654 } 655 priv->pfunc = &info->platform_callback; 656 657 /* set default param if platform doesn't have */ 658 if (usbhs_get_dparam(priv, has_new_pipe_configs)) { 659 priv->dparam.pipe_configs = usbhsc_new_pipe; 660 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); 661 } else if (!priv->dparam.pipe_configs) { 662 priv->dparam.pipe_configs = usbhsc_default_pipe; 663 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); 664 } 665 if (!priv->dparam.pio_dma_border) 666 priv->dparam.pio_dma_border = 64; /* 64byte */ 667 if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp)) 668 priv->dparam.buswait_bwait = tmp; 669 gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN); 670 if (IS_ERR(gpiod)) 671 return PTR_ERR(gpiod); 672 673 /* FIXME */ 674 /* runtime power control ? */ 675 if (priv->pfunc->get_vbus) 676 usbhs_get_dparam(priv, runtime_pwctrl) = 1; 677 678 /* 679 * priv settings 680 */ 681 priv->irq = irq; 682 priv->pdev = pdev; 683 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); 684 spin_lock_init(usbhs_priv_to_lock(priv)); 685 686 /* call pipe and module init */ 687 ret = usbhs_pipe_probe(priv); 688 if (ret < 0) 689 return ret; 690 691 ret = usbhs_fifo_probe(priv); 692 if (ret < 0) 693 goto probe_end_pipe_exit; 694 695 ret = usbhs_mod_probe(priv); 696 if (ret < 0) 697 goto probe_end_fifo_exit; 698 699 /* dev_set_drvdata should be called after usbhs_mod_init */ 700 platform_set_drvdata(pdev, priv); 701 702 ret = reset_control_deassert(priv->rsts); 703 if (ret) 704 goto probe_fail_rst; 705 706 ret = usbhsc_clk_get(dev, priv); 707 if (ret) 708 goto probe_fail_clks; 709 710 /* 711 * deviece reset here because 712 * USB device might be used in boot loader. 713 */ 714 usbhs_sys_clock_ctrl(priv, 0); 715 716 /* check GPIO determining if USB function should be enabled */ 717 if (gpiod) { 718 ret = !gpiod_get_value(gpiod); 719 if (ret) { 720 dev_warn(dev, "USB function not selected (GPIO)\n"); 721 ret = -ENOTSUPP; 722 goto probe_end_mod_exit; 723 } 724 } 725 726 /* 727 * platform call 728 * 729 * USB phy setup might depend on CPU/Board. 730 * If platform has its callback functions, 731 * call it here. 732 */ 733 ret = usbhs_platform_call(priv, hardware_init, pdev); 734 if (ret < 0) { 735 dev_err(dev, "platform init failed.\n"); 736 goto probe_end_mod_exit; 737 } 738 739 /* reset phy for connection */ 740 usbhs_platform_call(priv, phy_reset, pdev); 741 742 /* power control */ 743 pm_runtime_enable(dev); 744 if (!usbhs_get_dparam(priv, runtime_pwctrl)) { 745 usbhsc_power_ctrl(priv, 1); 746 usbhs_mod_autonomy_mode(priv); 747 } else { 748 usbhs_mod_non_autonomy_mode(priv); 749 } 750 751 /* 752 * manual call notify_hotplug for cold plug 753 */ 754 usbhsc_schedule_notify_hotplug(pdev); 755 756 dev_info(dev, "probed\n"); 757 758 return ret; 759 760 probe_end_mod_exit: 761 usbhsc_clk_put(priv); 762 probe_fail_clks: 763 reset_control_assert(priv->rsts); 764 probe_fail_rst: 765 usbhs_mod_remove(priv); 766 probe_end_fifo_exit: 767 usbhs_fifo_remove(priv); 768 probe_end_pipe_exit: 769 usbhs_pipe_remove(priv); 770 771 dev_info(dev, "probe failed (%d)\n", ret); 772 773 return ret; 774 } 775 usbhs_remove(struct platform_device * pdev)776 static void usbhs_remove(struct platform_device *pdev) 777 { 778 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 779 780 dev_dbg(&pdev->dev, "usb remove\n"); 781 782 /* power off */ 783 if (!usbhs_get_dparam(priv, runtime_pwctrl)) 784 usbhsc_power_ctrl(priv, 0); 785 786 pm_runtime_disable(&pdev->dev); 787 788 usbhs_platform_call(priv, hardware_exit, pdev); 789 usbhsc_clk_put(priv); 790 reset_control_assert(priv->rsts); 791 usbhs_mod_remove(priv); 792 usbhs_fifo_remove(priv); 793 usbhs_pipe_remove(priv); 794 } 795 usbhsc_suspend(struct device * dev)796 static __maybe_unused int usbhsc_suspend(struct device *dev) 797 { 798 struct usbhs_priv *priv = dev_get_drvdata(dev); 799 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 800 801 if (mod) { 802 usbhs_mod_call(priv, stop, priv); 803 usbhs_mod_change(priv, -1); 804 } 805 806 if (mod || !usbhs_get_dparam(priv, runtime_pwctrl)) 807 usbhsc_power_ctrl(priv, 0); 808 809 return 0; 810 } 811 usbhsc_resume(struct device * dev)812 static __maybe_unused int usbhsc_resume(struct device *dev) 813 { 814 struct usbhs_priv *priv = dev_get_drvdata(dev); 815 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 816 817 if (!usbhs_get_dparam(priv, runtime_pwctrl)) { 818 usbhsc_power_ctrl(priv, 1); 819 usbhs_mod_autonomy_mode(priv); 820 } 821 822 usbhs_platform_call(priv, phy_reset, pdev); 823 824 usbhsc_schedule_notify_hotplug(pdev); 825 826 return 0; 827 } 828 829 static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume); 830 831 static struct platform_driver renesas_usbhs_driver = { 832 .driver = { 833 .name = "renesas_usbhs", 834 .pm = &usbhsc_pm_ops, 835 .of_match_table = usbhs_of_match, 836 }, 837 .probe = usbhs_probe, 838 .remove_new = usbhs_remove, 839 }; 840 841 module_platform_driver(renesas_usbhs_driver); 842 843 MODULE_LICENSE("GPL"); 844 MODULE_DESCRIPTION("Renesas USB driver"); 845 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 846