1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Allwinner sun4i MUSB Glue Layer 4 * 5 * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com> 6 * 7 * Based on code from 8 * Allwinner Technology Co., Ltd. <www.allwinnertech.com> 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/err.h> 13 #include <linux/extcon.h> 14 #include <linux/io.h> 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/of.h> 18 #include <linux/phy/phy-sun4i-usb.h> 19 #include <linux/platform_device.h> 20 #include <linux/reset.h> 21 #include <linux/soc/sunxi/sunxi_sram.h> 22 #include <linux/usb/musb.h> 23 #include <linux/usb/of.h> 24 #include <linux/usb/usb_phy_generic.h> 25 #include <linux/workqueue.h> 26 #include "musb_core.h" 27 28 /* 29 * Register offsets, note sunxi musb has a different layout then most 30 * musb implementations, we translate the layout in musb_readb & friends. 31 */ 32 #define SUNXI_MUSB_POWER 0x0040 33 #define SUNXI_MUSB_DEVCTL 0x0041 34 #define SUNXI_MUSB_INDEX 0x0042 35 #define SUNXI_MUSB_VEND0 0x0043 36 #define SUNXI_MUSB_INTRTX 0x0044 37 #define SUNXI_MUSB_INTRRX 0x0046 38 #define SUNXI_MUSB_INTRTXE 0x0048 39 #define SUNXI_MUSB_INTRRXE 0x004a 40 #define SUNXI_MUSB_INTRUSB 0x004c 41 #define SUNXI_MUSB_INTRUSBE 0x0050 42 #define SUNXI_MUSB_FRAME 0x0054 43 #define SUNXI_MUSB_TXFIFOSZ 0x0090 44 #define SUNXI_MUSB_TXFIFOADD 0x0092 45 #define SUNXI_MUSB_RXFIFOSZ 0x0094 46 #define SUNXI_MUSB_RXFIFOADD 0x0096 47 #define SUNXI_MUSB_FADDR 0x0098 48 #define SUNXI_MUSB_TXFUNCADDR 0x0098 49 #define SUNXI_MUSB_TXHUBADDR 0x009a 50 #define SUNXI_MUSB_TXHUBPORT 0x009b 51 #define SUNXI_MUSB_RXFUNCADDR 0x009c 52 #define SUNXI_MUSB_RXHUBADDR 0x009e 53 #define SUNXI_MUSB_RXHUBPORT 0x009f 54 #define SUNXI_MUSB_CONFIGDATA 0x00c0 55 56 /* VEND0 bits */ 57 #define SUNXI_MUSB_VEND0_PIO_MODE 0 58 59 /* flags */ 60 #define SUNXI_MUSB_FL_ENABLED 0 61 #define SUNXI_MUSB_FL_HOSTMODE 1 62 #define SUNXI_MUSB_FL_HOSTMODE_PEND 2 63 #define SUNXI_MUSB_FL_VBUS_ON 3 64 #define SUNXI_MUSB_FL_PHY_ON 4 65 #define SUNXI_MUSB_FL_HAS_SRAM 5 66 #define SUNXI_MUSB_FL_HAS_RESET 6 67 #define SUNXI_MUSB_FL_NO_CONFIGDATA 7 68 #define SUNXI_MUSB_FL_PHY_MODE_PEND 8 69 70 /* Our read/write methods need access and do not get passed in a musb ref :| */ 71 static struct musb *sunxi_musb; 72 73 struct sunxi_glue { 74 struct device *dev; 75 struct musb *musb; 76 struct platform_device *musb_pdev; 77 struct clk *clk; 78 struct reset_control *rst; 79 struct phy *phy; 80 struct platform_device *usb_phy; 81 struct usb_phy *xceiv; 82 enum phy_mode phy_mode; 83 unsigned long flags; 84 struct work_struct work; 85 struct extcon_dev *extcon; 86 struct notifier_block host_nb; 87 }; 88 89 /* phy_power_on / off may sleep, so we use a workqueue */ 90 static void sunxi_musb_work(struct work_struct *work) 91 { 92 struct sunxi_glue *glue = container_of(work, struct sunxi_glue, work); 93 bool vbus_on, phy_on; 94 95 if (!test_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags)) 96 return; 97 98 if (test_and_clear_bit(SUNXI_MUSB_FL_HOSTMODE_PEND, &glue->flags)) { 99 struct musb *musb = glue->musb; 100 unsigned long flags; 101 u8 devctl; 102 103 spin_lock_irqsave(&musb->lock, flags); 104 105 devctl = readb(musb->mregs + SUNXI_MUSB_DEVCTL); 106 if (test_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags)) { 107 set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); 108 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; 109 MUSB_HST_MODE(musb); 110 devctl |= MUSB_DEVCTL_SESSION; 111 } else { 112 clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); 113 musb->xceiv->otg->state = OTG_STATE_B_IDLE; 114 MUSB_DEV_MODE(musb); 115 devctl &= ~MUSB_DEVCTL_SESSION; 116 } 117 writeb(devctl, musb->mregs + SUNXI_MUSB_DEVCTL); 118 119 spin_unlock_irqrestore(&musb->lock, flags); 120 } 121 122 vbus_on = test_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); 123 phy_on = test_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags); 124 125 if (phy_on != vbus_on) { 126 if (vbus_on) { 127 phy_power_on(glue->phy); 128 set_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags); 129 } else { 130 phy_power_off(glue->phy); 131 clear_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags); 132 } 133 } 134 135 if (test_and_clear_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags)) 136 phy_set_mode(glue->phy, glue->phy_mode); 137 } 138 139 static void sunxi_musb_set_vbus(struct musb *musb, int is_on) 140 { 141 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 142 143 if (is_on) { 144 set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); 145 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; 146 } else { 147 clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); 148 } 149 150 schedule_work(&glue->work); 151 } 152 153 static void sunxi_musb_pre_root_reset_end(struct musb *musb) 154 { 155 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 156 157 sun4i_usb_phy_set_squelch_detect(glue->phy, false); 158 } 159 160 static void sunxi_musb_post_root_reset_end(struct musb *musb) 161 { 162 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 163 164 sun4i_usb_phy_set_squelch_detect(glue->phy, true); 165 } 166 167 static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci) 168 { 169 struct musb *musb = __hci; 170 unsigned long flags; 171 172 spin_lock_irqsave(&musb->lock, flags); 173 174 musb->int_usb = readb(musb->mregs + SUNXI_MUSB_INTRUSB); 175 if (musb->int_usb) 176 writeb(musb->int_usb, musb->mregs + SUNXI_MUSB_INTRUSB); 177 178 if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) { 179 /* ep0 FADDR must be 0 when (re)entering peripheral mode */ 180 musb_ep_select(musb->mregs, 0); 181 musb_writeb(musb->mregs, MUSB_FADDR, 0); 182 } 183 184 musb->int_tx = readw(musb->mregs + SUNXI_MUSB_INTRTX); 185 if (musb->int_tx) 186 writew(musb->int_tx, musb->mregs + SUNXI_MUSB_INTRTX); 187 188 musb->int_rx = readw(musb->mregs + SUNXI_MUSB_INTRRX); 189 if (musb->int_rx) 190 writew(musb->int_rx, musb->mregs + SUNXI_MUSB_INTRRX); 191 192 musb_interrupt(musb); 193 194 spin_unlock_irqrestore(&musb->lock, flags); 195 196 return IRQ_HANDLED; 197 } 198 199 static int sunxi_musb_host_notifier(struct notifier_block *nb, 200 unsigned long event, void *ptr) 201 { 202 struct sunxi_glue *glue = container_of(nb, struct sunxi_glue, host_nb); 203 204 if (event) 205 set_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags); 206 else 207 clear_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags); 208 209 set_bit(SUNXI_MUSB_FL_HOSTMODE_PEND, &glue->flags); 210 schedule_work(&glue->work); 211 212 return NOTIFY_DONE; 213 } 214 215 static int sunxi_musb_init(struct musb *musb) 216 { 217 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 218 int ret; 219 220 sunxi_musb = musb; 221 musb->phy = glue->phy; 222 musb->xceiv = glue->xceiv; 223 224 if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) { 225 ret = sunxi_sram_claim(musb->controller->parent); 226 if (ret) 227 return ret; 228 } 229 230 ret = clk_prepare_enable(glue->clk); 231 if (ret) 232 goto error_sram_release; 233 234 if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) { 235 ret = reset_control_deassert(glue->rst); 236 if (ret) 237 goto error_clk_disable; 238 } 239 240 writeb(SUNXI_MUSB_VEND0_PIO_MODE, musb->mregs + SUNXI_MUSB_VEND0); 241 242 /* Register notifier before calling phy_init() */ 243 ret = devm_extcon_register_notifier(glue->dev, glue->extcon, 244 EXTCON_USB_HOST, &glue->host_nb); 245 if (ret) 246 goto error_reset_assert; 247 248 ret = phy_init(glue->phy); 249 if (ret) 250 goto error_reset_assert; 251 252 musb->isr = sunxi_musb_interrupt; 253 254 /* Stop the musb-core from doing runtime pm (not supported on sunxi) */ 255 pm_runtime_get(musb->controller); 256 257 return 0; 258 259 error_reset_assert: 260 if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) 261 reset_control_assert(glue->rst); 262 error_clk_disable: 263 clk_disable_unprepare(glue->clk); 264 error_sram_release: 265 if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) 266 sunxi_sram_release(musb->controller->parent); 267 return ret; 268 } 269 270 static int sunxi_musb_exit(struct musb *musb) 271 { 272 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 273 274 pm_runtime_put(musb->controller); 275 276 cancel_work_sync(&glue->work); 277 if (test_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags)) 278 phy_power_off(glue->phy); 279 280 phy_exit(glue->phy); 281 282 if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) 283 reset_control_assert(glue->rst); 284 285 clk_disable_unprepare(glue->clk); 286 if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) 287 sunxi_sram_release(musb->controller->parent); 288 289 devm_usb_put_phy(glue->dev, glue->xceiv); 290 291 return 0; 292 } 293 294 static void sunxi_musb_enable(struct musb *musb) 295 { 296 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 297 298 glue->musb = musb; 299 300 /* musb_core does not call us in a balanced manner */ 301 if (test_and_set_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags)) 302 return; 303 304 schedule_work(&glue->work); 305 } 306 307 static void sunxi_musb_disable(struct musb *musb) 308 { 309 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 310 311 clear_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags); 312 } 313 314 static struct dma_controller * 315 sunxi_musb_dma_controller_create(struct musb *musb, void __iomem *base) 316 { 317 return NULL; 318 } 319 320 static void sunxi_musb_dma_controller_destroy(struct dma_controller *c) 321 { 322 } 323 324 static int sunxi_musb_set_mode(struct musb *musb, u8 mode) 325 { 326 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 327 enum phy_mode new_mode; 328 329 switch (mode) { 330 case MUSB_HOST: 331 new_mode = PHY_MODE_USB_HOST; 332 break; 333 case MUSB_PERIPHERAL: 334 new_mode = PHY_MODE_USB_DEVICE; 335 break; 336 case MUSB_OTG: 337 new_mode = PHY_MODE_USB_OTG; 338 break; 339 default: 340 dev_err(musb->controller->parent, 341 "Error requested mode not supported by this kernel\n"); 342 return -EINVAL; 343 } 344 345 if (glue->phy_mode == new_mode) 346 return 0; 347 348 if (musb->port_mode != MUSB_OTG) { 349 dev_err(musb->controller->parent, 350 "Error changing modes is only supported in dual role mode\n"); 351 return -EINVAL; 352 } 353 354 if (musb->port1_status & USB_PORT_STAT_ENABLE) 355 musb_root_disconnect(musb); 356 357 /* 358 * phy_set_mode may sleep, and we're called with a spinlock held, 359 * so let sunxi_musb_work deal with it. 360 */ 361 glue->phy_mode = new_mode; 362 set_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags); 363 schedule_work(&glue->work); 364 365 return 0; 366 } 367 368 static int sunxi_musb_recover(struct musb *musb) 369 { 370 struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); 371 372 /* 373 * Schedule a phy_set_mode with the current glue->phy_mode value, 374 * this will force end the current session. 375 */ 376 set_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags); 377 schedule_work(&glue->work); 378 379 return 0; 380 } 381 382 /* 383 * sunxi musb register layout 384 * 0x00 - 0x17 fifo regs, 1 long per fifo 385 * 0x40 - 0x57 generic control regs (power - frame) 386 * 0x80 - 0x8f ep control regs (addressed through hw_ep->regs, indexed) 387 * 0x90 - 0x97 fifo control regs (indexed) 388 * 0x98 - 0x9f multipoint / busctl regs (indexed) 389 * 0xc0 configdata reg 390 */ 391 392 static u32 sunxi_musb_fifo_offset(u8 epnum) 393 { 394 return (epnum * 4); 395 } 396 397 static u32 sunxi_musb_ep_offset(u8 epnum, u16 offset) 398 { 399 WARN_ONCE(offset != 0, 400 "sunxi_musb_ep_offset called with non 0 offset\n"); 401 402 return 0x80; /* indexed, so ignore epnum */ 403 } 404 405 static u32 sunxi_musb_busctl_offset(u8 epnum, u16 offset) 406 { 407 return SUNXI_MUSB_TXFUNCADDR + offset; 408 } 409 410 static u8 sunxi_musb_readb(void __iomem *addr, u32 offset) 411 { 412 struct sunxi_glue *glue; 413 414 if (addr == sunxi_musb->mregs) { 415 /* generic control or fifo control reg access */ 416 switch (offset) { 417 case MUSB_FADDR: 418 return readb(addr + SUNXI_MUSB_FADDR); 419 case MUSB_POWER: 420 return readb(addr + SUNXI_MUSB_POWER); 421 case MUSB_INTRUSB: 422 return readb(addr + SUNXI_MUSB_INTRUSB); 423 case MUSB_INTRUSBE: 424 return readb(addr + SUNXI_MUSB_INTRUSBE); 425 case MUSB_INDEX: 426 return readb(addr + SUNXI_MUSB_INDEX); 427 case MUSB_TESTMODE: 428 return 0; /* No testmode on sunxi */ 429 case MUSB_DEVCTL: 430 return readb(addr + SUNXI_MUSB_DEVCTL); 431 case MUSB_TXFIFOSZ: 432 return readb(addr + SUNXI_MUSB_TXFIFOSZ); 433 case MUSB_RXFIFOSZ: 434 return readb(addr + SUNXI_MUSB_RXFIFOSZ); 435 case MUSB_CONFIGDATA + 0x10: /* See musb_read_configdata() */ 436 glue = dev_get_drvdata(sunxi_musb->controller->parent); 437 /* A33 saves a reg, and we get to hardcode this */ 438 if (test_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, 439 &glue->flags)) 440 return 0xde; 441 442 return readb(addr + SUNXI_MUSB_CONFIGDATA); 443 /* Offset for these is fixed by sunxi_musb_busctl_offset() */ 444 case SUNXI_MUSB_TXFUNCADDR: 445 case SUNXI_MUSB_TXHUBADDR: 446 case SUNXI_MUSB_TXHUBPORT: 447 case SUNXI_MUSB_RXFUNCADDR: 448 case SUNXI_MUSB_RXHUBADDR: 449 case SUNXI_MUSB_RXHUBPORT: 450 /* multipoint / busctl reg access */ 451 return readb(addr + offset); 452 default: 453 dev_err(sunxi_musb->controller->parent, 454 "Error unknown readb offset %u\n", offset); 455 return 0; 456 } 457 } else if (addr == (sunxi_musb->mregs + 0x80)) { 458 /* ep control reg access */ 459 /* sunxi has a 2 byte hole before the txtype register */ 460 if (offset >= MUSB_TXTYPE) 461 offset += 2; 462 return readb(addr + offset); 463 } 464 465 dev_err(sunxi_musb->controller->parent, 466 "Error unknown readb at 0x%x bytes offset\n", 467 (int)(addr - sunxi_musb->mregs)); 468 return 0; 469 } 470 471 static void sunxi_musb_writeb(void __iomem *addr, unsigned offset, u8 data) 472 { 473 if (addr == sunxi_musb->mregs) { 474 /* generic control or fifo control reg access */ 475 switch (offset) { 476 case MUSB_FADDR: 477 return writeb(data, addr + SUNXI_MUSB_FADDR); 478 case MUSB_POWER: 479 return writeb(data, addr + SUNXI_MUSB_POWER); 480 case MUSB_INTRUSB: 481 return writeb(data, addr + SUNXI_MUSB_INTRUSB); 482 case MUSB_INTRUSBE: 483 return writeb(data, addr + SUNXI_MUSB_INTRUSBE); 484 case MUSB_INDEX: 485 return writeb(data, addr + SUNXI_MUSB_INDEX); 486 case MUSB_TESTMODE: 487 if (data) 488 dev_warn(sunxi_musb->controller->parent, 489 "sunxi-musb does not have testmode\n"); 490 return; 491 case MUSB_DEVCTL: 492 return writeb(data, addr + SUNXI_MUSB_DEVCTL); 493 case MUSB_TXFIFOSZ: 494 return writeb(data, addr + SUNXI_MUSB_TXFIFOSZ); 495 case MUSB_RXFIFOSZ: 496 return writeb(data, addr + SUNXI_MUSB_RXFIFOSZ); 497 /* Offset for these is fixed by sunxi_musb_busctl_offset() */ 498 case SUNXI_MUSB_TXFUNCADDR: 499 case SUNXI_MUSB_TXHUBADDR: 500 case SUNXI_MUSB_TXHUBPORT: 501 case SUNXI_MUSB_RXFUNCADDR: 502 case SUNXI_MUSB_RXHUBADDR: 503 case SUNXI_MUSB_RXHUBPORT: 504 /* multipoint / busctl reg access */ 505 return writeb(data, addr + offset); 506 default: 507 dev_err(sunxi_musb->controller->parent, 508 "Error unknown writeb offset %u\n", offset); 509 return; 510 } 511 } else if (addr == (sunxi_musb->mregs + 0x80)) { 512 /* ep control reg access */ 513 if (offset >= MUSB_TXTYPE) 514 offset += 2; 515 return writeb(data, addr + offset); 516 } 517 518 dev_err(sunxi_musb->controller->parent, 519 "Error unknown writeb at 0x%x bytes offset\n", 520 (int)(addr - sunxi_musb->mregs)); 521 } 522 523 static u16 sunxi_musb_readw(void __iomem *addr, u32 offset) 524 { 525 if (addr == sunxi_musb->mregs) { 526 /* generic control or fifo control reg access */ 527 switch (offset) { 528 case MUSB_INTRTX: 529 return readw(addr + SUNXI_MUSB_INTRTX); 530 case MUSB_INTRRX: 531 return readw(addr + SUNXI_MUSB_INTRRX); 532 case MUSB_INTRTXE: 533 return readw(addr + SUNXI_MUSB_INTRTXE); 534 case MUSB_INTRRXE: 535 return readw(addr + SUNXI_MUSB_INTRRXE); 536 case MUSB_FRAME: 537 return readw(addr + SUNXI_MUSB_FRAME); 538 case MUSB_TXFIFOADD: 539 return readw(addr + SUNXI_MUSB_TXFIFOADD); 540 case MUSB_RXFIFOADD: 541 return readw(addr + SUNXI_MUSB_RXFIFOADD); 542 case MUSB_HWVERS: 543 return 0; /* sunxi musb version is not known */ 544 default: 545 dev_err(sunxi_musb->controller->parent, 546 "Error unknown readw offset %u\n", offset); 547 return 0; 548 } 549 } else if (addr == (sunxi_musb->mregs + 0x80)) { 550 /* ep control reg access */ 551 return readw(addr + offset); 552 } 553 554 dev_err(sunxi_musb->controller->parent, 555 "Error unknown readw at 0x%x bytes offset\n", 556 (int)(addr - sunxi_musb->mregs)); 557 return 0; 558 } 559 560 static void sunxi_musb_writew(void __iomem *addr, unsigned offset, u16 data) 561 { 562 if (addr == sunxi_musb->mregs) { 563 /* generic control or fifo control reg access */ 564 switch (offset) { 565 case MUSB_INTRTX: 566 return writew(data, addr + SUNXI_MUSB_INTRTX); 567 case MUSB_INTRRX: 568 return writew(data, addr + SUNXI_MUSB_INTRRX); 569 case MUSB_INTRTXE: 570 return writew(data, addr + SUNXI_MUSB_INTRTXE); 571 case MUSB_INTRRXE: 572 return writew(data, addr + SUNXI_MUSB_INTRRXE); 573 case MUSB_FRAME: 574 return writew(data, addr + SUNXI_MUSB_FRAME); 575 case MUSB_TXFIFOADD: 576 return writew(data, addr + SUNXI_MUSB_TXFIFOADD); 577 case MUSB_RXFIFOADD: 578 return writew(data, addr + SUNXI_MUSB_RXFIFOADD); 579 default: 580 dev_err(sunxi_musb->controller->parent, 581 "Error unknown writew offset %u\n", offset); 582 return; 583 } 584 } else if (addr == (sunxi_musb->mregs + 0x80)) { 585 /* ep control reg access */ 586 return writew(data, addr + offset); 587 } 588 589 dev_err(sunxi_musb->controller->parent, 590 "Error unknown writew at 0x%x bytes offset\n", 591 (int)(addr - sunxi_musb->mregs)); 592 } 593 594 static const struct musb_platform_ops sunxi_musb_ops = { 595 .quirks = MUSB_INDEXED_EP, 596 .init = sunxi_musb_init, 597 .exit = sunxi_musb_exit, 598 .enable = sunxi_musb_enable, 599 .disable = sunxi_musb_disable, 600 .fifo_offset = sunxi_musb_fifo_offset, 601 .ep_offset = sunxi_musb_ep_offset, 602 .busctl_offset = sunxi_musb_busctl_offset, 603 .readb = sunxi_musb_readb, 604 .writeb = sunxi_musb_writeb, 605 .readw = sunxi_musb_readw, 606 .writew = sunxi_musb_writew, 607 .dma_init = sunxi_musb_dma_controller_create, 608 .dma_exit = sunxi_musb_dma_controller_destroy, 609 .set_mode = sunxi_musb_set_mode, 610 .recover = sunxi_musb_recover, 611 .set_vbus = sunxi_musb_set_vbus, 612 .pre_root_reset_end = sunxi_musb_pre_root_reset_end, 613 .post_root_reset_end = sunxi_musb_post_root_reset_end, 614 }; 615 616 /* Allwinner OTG supports up to 5 endpoints */ 617 #define SUNXI_MUSB_MAX_EP_NUM 6 618 #define SUNXI_MUSB_RAM_BITS 11 619 620 static struct musb_fifo_cfg sunxi_musb_mode_cfg[] = { 621 MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512), 622 MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512), 623 MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512), 624 MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512), 625 MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512), 626 MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512), 627 MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512), 628 MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512), 629 MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512), 630 MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512), 631 }; 632 633 /* H3/V3s OTG supports only 4 endpoints */ 634 #define SUNXI_MUSB_MAX_EP_NUM_H3 5 635 636 static struct musb_fifo_cfg sunxi_musb_mode_cfg_h3[] = { 637 MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512), 638 MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512), 639 MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512), 640 MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512), 641 MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512), 642 MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512), 643 MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512), 644 MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512), 645 }; 646 647 static const struct musb_hdrc_config sunxi_musb_hdrc_config = { 648 .fifo_cfg = sunxi_musb_mode_cfg, 649 .fifo_cfg_size = ARRAY_SIZE(sunxi_musb_mode_cfg), 650 .multipoint = true, 651 .dyn_fifo = true, 652 .num_eps = SUNXI_MUSB_MAX_EP_NUM, 653 .ram_bits = SUNXI_MUSB_RAM_BITS, 654 }; 655 656 static struct musb_hdrc_config sunxi_musb_hdrc_config_h3 = { 657 .fifo_cfg = sunxi_musb_mode_cfg_h3, 658 .fifo_cfg_size = ARRAY_SIZE(sunxi_musb_mode_cfg_h3), 659 .multipoint = true, 660 .dyn_fifo = true, 661 .num_eps = SUNXI_MUSB_MAX_EP_NUM_H3, 662 .ram_bits = SUNXI_MUSB_RAM_BITS, 663 }; 664 665 666 static int sunxi_musb_probe(struct platform_device *pdev) 667 { 668 struct musb_hdrc_platform_data pdata; 669 struct platform_device_info pinfo; 670 struct sunxi_glue *glue; 671 struct device_node *np = pdev->dev.of_node; 672 int ret; 673 674 if (!np) { 675 dev_err(&pdev->dev, "Error no device tree node found\n"); 676 return -EINVAL; 677 } 678 679 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 680 if (!glue) 681 return -ENOMEM; 682 683 memset(&pdata, 0, sizeof(pdata)); 684 switch (usb_get_dr_mode(&pdev->dev)) { 685 #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST 686 case USB_DR_MODE_HOST: 687 pdata.mode = MUSB_HOST; 688 glue->phy_mode = PHY_MODE_USB_HOST; 689 break; 690 #endif 691 #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_GADGET 692 case USB_DR_MODE_PERIPHERAL: 693 pdata.mode = MUSB_PERIPHERAL; 694 glue->phy_mode = PHY_MODE_USB_DEVICE; 695 break; 696 #endif 697 #ifdef CONFIG_USB_MUSB_DUAL_ROLE 698 case USB_DR_MODE_OTG: 699 pdata.mode = MUSB_OTG; 700 glue->phy_mode = PHY_MODE_USB_OTG; 701 break; 702 #endif 703 default: 704 dev_err(&pdev->dev, "Invalid or missing 'dr_mode' property\n"); 705 return -EINVAL; 706 } 707 pdata.platform_ops = &sunxi_musb_ops; 708 if (!of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) 709 pdata.config = &sunxi_musb_hdrc_config; 710 else 711 pdata.config = &sunxi_musb_hdrc_config_h3; 712 713 glue->dev = &pdev->dev; 714 INIT_WORK(&glue->work, sunxi_musb_work); 715 glue->host_nb.notifier_call = sunxi_musb_host_notifier; 716 717 if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb")) 718 set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags); 719 720 if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb")) 721 set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags); 722 723 if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb") || 724 of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) { 725 set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags); 726 set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags); 727 } 728 729 glue->clk = devm_clk_get(&pdev->dev, NULL); 730 if (IS_ERR(glue->clk)) { 731 dev_err(&pdev->dev, "Error getting clock: %ld\n", 732 PTR_ERR(glue->clk)); 733 return PTR_ERR(glue->clk); 734 } 735 736 if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) { 737 glue->rst = devm_reset_control_get(&pdev->dev, NULL); 738 if (IS_ERR(glue->rst)) { 739 if (PTR_ERR(glue->rst) == -EPROBE_DEFER) 740 return -EPROBE_DEFER; 741 dev_err(&pdev->dev, "Error getting reset %ld\n", 742 PTR_ERR(glue->rst)); 743 return PTR_ERR(glue->rst); 744 } 745 } 746 747 glue->extcon = extcon_get_edev_by_phandle(&pdev->dev, 0); 748 if (IS_ERR(glue->extcon)) { 749 if (PTR_ERR(glue->extcon) == -EPROBE_DEFER) 750 return -EPROBE_DEFER; 751 dev_err(&pdev->dev, "Invalid or missing extcon\n"); 752 return PTR_ERR(glue->extcon); 753 } 754 755 glue->phy = devm_phy_get(&pdev->dev, "usb"); 756 if (IS_ERR(glue->phy)) { 757 if (PTR_ERR(glue->phy) == -EPROBE_DEFER) 758 return -EPROBE_DEFER; 759 dev_err(&pdev->dev, "Error getting phy %ld\n", 760 PTR_ERR(glue->phy)); 761 return PTR_ERR(glue->phy); 762 } 763 764 glue->usb_phy = usb_phy_generic_register(); 765 if (IS_ERR(glue->usb_phy)) { 766 dev_err(&pdev->dev, "Error registering usb-phy %ld\n", 767 PTR_ERR(glue->usb_phy)); 768 return PTR_ERR(glue->usb_phy); 769 } 770 771 glue->xceiv = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); 772 if (IS_ERR(glue->xceiv)) { 773 ret = PTR_ERR(glue->xceiv); 774 dev_err(&pdev->dev, "Error getting usb-phy %d\n", ret); 775 goto err_unregister_usb_phy; 776 } 777 778 platform_set_drvdata(pdev, glue); 779 780 memset(&pinfo, 0, sizeof(pinfo)); 781 pinfo.name = "musb-hdrc"; 782 pinfo.id = PLATFORM_DEVID_AUTO; 783 pinfo.parent = &pdev->dev; 784 pinfo.fwnode = of_fwnode_handle(pdev->dev.of_node); 785 pinfo.of_node_reused = true; 786 pinfo.res = pdev->resource; 787 pinfo.num_res = pdev->num_resources; 788 pinfo.data = &pdata; 789 pinfo.size_data = sizeof(pdata); 790 791 glue->musb_pdev = platform_device_register_full(&pinfo); 792 if (IS_ERR(glue->musb_pdev)) { 793 ret = PTR_ERR(glue->musb_pdev); 794 dev_err(&pdev->dev, "Error registering musb dev: %d\n", ret); 795 goto err_unregister_usb_phy; 796 } 797 798 return 0; 799 800 err_unregister_usb_phy: 801 usb_phy_generic_unregister(glue->usb_phy); 802 return ret; 803 } 804 805 static int sunxi_musb_remove(struct platform_device *pdev) 806 { 807 struct sunxi_glue *glue = platform_get_drvdata(pdev); 808 struct platform_device *usb_phy = glue->usb_phy; 809 810 platform_device_unregister(glue->musb_pdev); 811 usb_phy_generic_unregister(usb_phy); 812 813 return 0; 814 } 815 816 static const struct of_device_id sunxi_musb_match[] = { 817 { .compatible = "allwinner,sun4i-a10-musb", }, 818 { .compatible = "allwinner,sun6i-a31-musb", }, 819 { .compatible = "allwinner,sun8i-a33-musb", }, 820 { .compatible = "allwinner,sun8i-h3-musb", }, 821 {} 822 }; 823 MODULE_DEVICE_TABLE(of, sunxi_musb_match); 824 825 static struct platform_driver sunxi_musb_driver = { 826 .probe = sunxi_musb_probe, 827 .remove = sunxi_musb_remove, 828 .driver = { 829 .name = "musb-sunxi", 830 .of_match_table = sunxi_musb_match, 831 }, 832 }; 833 module_platform_driver(sunxi_musb_driver); 834 835 MODULE_DESCRIPTION("Allwinner sunxi MUSB Glue Layer"); 836 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 837 MODULE_LICENSE("GPL v2"); 838