1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ISP116x HCD (Host Controller Driver) for USB. 4 * 5 * Derived from the SL811 HCD, rewritten for ISP116x. 6 * Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee> 7 * 8 * Portions: 9 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO) 10 * Copyright (C) 2004 David Brownell 11 * 12 * Periodic scheduling is based on Roman's OHCI code 13 * Copyright (C) 1999 Roman Weissgaerber 14 * 15 */ 16 17 /* 18 * The driver basically works. A number of people have used it with a range 19 * of devices. 20 * 21 * The driver passes all usbtests 1-14. 22 * 23 * Suspending/resuming of root hub via sysfs works. Remote wakeup works too. 24 * And suspending/resuming of platform device works too. Suspend/resume 25 * via HCD operations vector is not implemented. 26 * 27 * Iso transfer support is not implemented. Adding this would include 28 * implementing recovery from the failure to service the processed ITL 29 * fifo ram in time, which will involve chip reset. 30 * 31 * TODO: 32 + More testing of suspend/resume. 33 */ 34 35 /* 36 ISP116x chips require certain delays between accesses to its 37 registers. The following timing options exist. 38 39 1. Configure your memory controller (the best) 40 2. Implement platform-specific delay function possibly 41 combined with configuring the memory controller; see 42 include/linux/usb-isp116x.h for more info. Some broken 43 memory controllers line LH7A400 SMC need this. Also, 44 uncomment for that to work the following 45 USE_PLATFORM_DELAY macro. 46 3. Use ndelay (easiest, poorest). For that, uncomment 47 the following USE_NDELAY macro. 48 */ 49 #define USE_PLATFORM_DELAY 50 //#define USE_NDELAY 51 52 //#define DEBUG 53 //#define VERBOSE 54 /* Transfer descriptors. See dump_ptd() for printout format */ 55 //#define PTD_TRACE 56 /* enqueuing/finishing log of urbs */ 57 //#define URB_TRACE 58 59 #include <linux/module.h> 60 #include <linux/delay.h> 61 #include <linux/debugfs.h> 62 #include <linux/seq_file.h> 63 #include <linux/errno.h> 64 #include <linux/list.h> 65 #include <linux/slab.h> 66 #include <linux/usb.h> 67 #include <linux/usb/isp116x.h> 68 #include <linux/usb/hcd.h> 69 #include <linux/platform_device.h> 70 71 #include <asm/io.h> 72 #include <asm/irq.h> 73 #include <asm/byteorder.h> 74 75 #include "isp116x.h" 76 77 #define DRIVER_VERSION "03 Nov 2005" 78 #define DRIVER_DESC "ISP116x USB Host Controller Driver" 79 80 MODULE_DESCRIPTION(DRIVER_DESC); 81 MODULE_LICENSE("GPL"); 82 83 static const char hcd_name[] = "isp116x-hcd"; 84 85 /*-----------------------------------------------------------------*/ 86 87 /* 88 Write len bytes to fifo, pad till 32-bit boundary 89 */ 90 static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len) 91 { 92 u8 *dp = (u8 *) buf; 93 u16 *dp2 = (u16 *) buf; 94 u16 w; 95 int quot = len % 4; 96 97 /* buffer is already in 'usb data order', which is LE. */ 98 /* When reading buffer as u16, we have to take care byte order */ 99 /* doesn't get mixed up */ 100 101 if ((unsigned long)dp2 & 1) { 102 /* not aligned */ 103 for (; len > 1; len -= 2) { 104 w = *dp++; 105 w |= *dp++ << 8; 106 isp116x_raw_write_data16(isp116x, w); 107 } 108 if (len) 109 isp116x_write_data16(isp116x, (u16) * dp); 110 } else { 111 /* aligned */ 112 for (; len > 1; len -= 2) { 113 /* Keep byte order ! */ 114 isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++)); 115 } 116 117 if (len) 118 isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2)); 119 } 120 if (quot == 1 || quot == 2) 121 isp116x_raw_write_data16(isp116x, 0); 122 } 123 124 /* 125 Read len bytes from fifo and then read till 32-bit boundary. 126 */ 127 static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len) 128 { 129 u8 *dp = (u8 *) buf; 130 u16 *dp2 = (u16 *) buf; 131 u16 w; 132 int quot = len % 4; 133 134 /* buffer is already in 'usb data order', which is LE. */ 135 /* When reading buffer as u16, we have to take care byte order */ 136 /* doesn't get mixed up */ 137 138 if ((unsigned long)dp2 & 1) { 139 /* not aligned */ 140 for (; len > 1; len -= 2) { 141 w = isp116x_raw_read_data16(isp116x); 142 *dp++ = w & 0xff; 143 *dp++ = (w >> 8) & 0xff; 144 } 145 146 if (len) 147 *dp = 0xff & isp116x_read_data16(isp116x); 148 } else { 149 /* aligned */ 150 for (; len > 1; len -= 2) { 151 /* Keep byte order! */ 152 *dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x)); 153 } 154 155 if (len) 156 *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x); 157 } 158 if (quot == 1 || quot == 2) 159 isp116x_raw_read_data16(isp116x); 160 } 161 162 /* 163 Write ptd's and data for scheduled transfers into 164 the fifo ram. Fifo must be empty and ready. 165 */ 166 static void pack_fifo(struct isp116x *isp116x) 167 { 168 struct isp116x_ep *ep; 169 struct ptd *ptd; 170 int buflen = isp116x->atl_last_dir == PTD_DIR_IN 171 ? isp116x->atl_bufshrt : isp116x->atl_buflen; 172 173 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT); 174 isp116x_write_reg16(isp116x, HCXFERCTR, buflen); 175 isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET); 176 for (ep = isp116x->atl_active; ep; ep = ep->active) { 177 ptd = &ep->ptd; 178 dump_ptd(ptd); 179 dump_ptd_out_data(ptd, ep->data); 180 isp116x_write_data16(isp116x, ptd->count); 181 isp116x_write_data16(isp116x, ptd->mps); 182 isp116x_write_data16(isp116x, ptd->len); 183 isp116x_write_data16(isp116x, ptd->faddr); 184 buflen -= sizeof(struct ptd); 185 /* Skip writing data for last IN PTD */ 186 if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) { 187 write_ptddata_to_fifo(isp116x, ep->data, ep->length); 188 buflen -= ALIGN(ep->length, 4); 189 } 190 } 191 BUG_ON(buflen); 192 } 193 194 /* 195 Read the processed ptd's and data from fifo ram back to 196 URBs' buffers. Fifo must be full and done 197 */ 198 static void unpack_fifo(struct isp116x *isp116x) 199 { 200 struct isp116x_ep *ep; 201 struct ptd *ptd; 202 int buflen = isp116x->atl_last_dir == PTD_DIR_IN 203 ? isp116x->atl_buflen : isp116x->atl_bufshrt; 204 205 isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT); 206 isp116x_write_reg16(isp116x, HCXFERCTR, buflen); 207 isp116x_write_addr(isp116x, HCATLPORT); 208 for (ep = isp116x->atl_active; ep; ep = ep->active) { 209 ptd = &ep->ptd; 210 ptd->count = isp116x_read_data16(isp116x); 211 ptd->mps = isp116x_read_data16(isp116x); 212 ptd->len = isp116x_read_data16(isp116x); 213 ptd->faddr = isp116x_read_data16(isp116x); 214 buflen -= sizeof(struct ptd); 215 /* Skip reading data for last Setup or Out PTD */ 216 if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) { 217 read_ptddata_from_fifo(isp116x, ep->data, ep->length); 218 buflen -= ALIGN(ep->length, 4); 219 } 220 dump_ptd(ptd); 221 dump_ptd_in_data(ptd, ep->data); 222 } 223 BUG_ON(buflen); 224 } 225 226 /*---------------------------------------------------------------*/ 227 228 /* 229 Set up PTD's. 230 */ 231 static void preproc_atl_queue(struct isp116x *isp116x) 232 { 233 struct isp116x_ep *ep; 234 struct urb *urb; 235 struct ptd *ptd; 236 u16 len; 237 238 for (ep = isp116x->atl_active; ep; ep = ep->active) { 239 u16 toggle = 0, dir = PTD_DIR_SETUP; 240 241 BUG_ON(list_empty(&ep->hep->urb_list)); 242 urb = container_of(ep->hep->urb_list.next, 243 struct urb, urb_list); 244 ptd = &ep->ptd; 245 len = ep->length; 246 ep->data = (unsigned char *)urb->transfer_buffer 247 + urb->actual_length; 248 249 switch (ep->nextpid) { 250 case USB_PID_IN: 251 toggle = usb_gettoggle(urb->dev, ep->epnum, 0); 252 dir = PTD_DIR_IN; 253 break; 254 case USB_PID_OUT: 255 toggle = usb_gettoggle(urb->dev, ep->epnum, 1); 256 dir = PTD_DIR_OUT; 257 break; 258 case USB_PID_SETUP: 259 len = sizeof(struct usb_ctrlrequest); 260 ep->data = urb->setup_packet; 261 break; 262 case USB_PID_ACK: 263 toggle = 1; 264 len = 0; 265 dir = (urb->transfer_buffer_length 266 && usb_pipein(urb->pipe)) 267 ? PTD_DIR_OUT : PTD_DIR_IN; 268 break; 269 default: 270 ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__, 271 ep->nextpid); 272 BUG(); 273 } 274 275 ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle); 276 ptd->mps = PTD_MPS(ep->maxpacket) 277 | PTD_SPD(urb->dev->speed == USB_SPEED_LOW) 278 | PTD_EP(ep->epnum); 279 ptd->len = PTD_LEN(len) | PTD_DIR(dir); 280 ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe)); 281 if (!ep->active) { 282 ptd->mps |= PTD_LAST_MSK; 283 isp116x->atl_last_dir = dir; 284 } 285 isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen; 286 isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4); 287 } 288 } 289 290 /* 291 Take done or failed requests out of schedule. Give back 292 processed urbs. 293 */ 294 static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep, 295 struct urb *urb, int status) 296 __releases(isp116x->lock) __acquires(isp116x->lock) 297 { 298 unsigned i; 299 300 ep->error_count = 0; 301 302 if (usb_pipecontrol(urb->pipe)) 303 ep->nextpid = USB_PID_SETUP; 304 305 urb_dbg(urb, "Finish"); 306 307 usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb); 308 spin_unlock(&isp116x->lock); 309 usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status); 310 spin_lock(&isp116x->lock); 311 312 /* take idle endpoints out of the schedule */ 313 if (!list_empty(&ep->hep->urb_list)) 314 return; 315 316 /* async deschedule */ 317 if (!list_empty(&ep->schedule)) { 318 list_del_init(&ep->schedule); 319 return; 320 } 321 322 /* periodic deschedule */ 323 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); 324 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { 325 struct isp116x_ep *temp; 326 struct isp116x_ep **prev = &isp116x->periodic[i]; 327 328 while (*prev && ((temp = *prev) != ep)) 329 prev = &temp->next; 330 if (*prev) 331 *prev = ep->next; 332 isp116x->load[i] -= ep->load; 333 } 334 ep->branch = PERIODIC_SIZE; 335 isp116x_to_hcd(isp116x)->self.bandwidth_allocated -= 336 ep->load / ep->period; 337 338 /* switch irq type? */ 339 if (!--isp116x->periodic_count) { 340 isp116x->irqenb &= ~HCuPINT_SOF; 341 isp116x->irqenb |= HCuPINT_ATL; 342 } 343 } 344 345 /* 346 Analyze transfer results, handle partial transfers and errors 347 */ 348 static void postproc_atl_queue(struct isp116x *isp116x) 349 { 350 struct isp116x_ep *ep; 351 struct urb *urb; 352 struct usb_device *udev; 353 struct ptd *ptd; 354 int short_not_ok; 355 int status; 356 u8 cc; 357 358 for (ep = isp116x->atl_active; ep; ep = ep->active) { 359 BUG_ON(list_empty(&ep->hep->urb_list)); 360 urb = 361 container_of(ep->hep->urb_list.next, struct urb, urb_list); 362 udev = urb->dev; 363 ptd = &ep->ptd; 364 cc = PTD_GET_CC(ptd); 365 short_not_ok = 1; 366 status = -EINPROGRESS; 367 368 /* Data underrun is special. For allowed underrun 369 we clear the error and continue as normal. For 370 forbidden underrun we finish the DATA stage 371 immediately while for control transfer, 372 we do a STATUS stage. */ 373 if (cc == TD_DATAUNDERRUN) { 374 if (!(urb->transfer_flags & URB_SHORT_NOT_OK) || 375 usb_pipecontrol(urb->pipe)) { 376 DBG("Allowed or control data underrun\n"); 377 cc = TD_CC_NOERROR; 378 short_not_ok = 0; 379 } else { 380 ep->error_count = 1; 381 usb_settoggle(udev, ep->epnum, 382 ep->nextpid == USB_PID_OUT, 383 PTD_GET_TOGGLE(ptd)); 384 urb->actual_length += PTD_GET_COUNT(ptd); 385 status = cc_to_error[TD_DATAUNDERRUN]; 386 goto done; 387 } 388 } 389 390 if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED 391 && (++ep->error_count >= 3 || cc == TD_CC_STALL 392 || cc == TD_DATAOVERRUN)) { 393 status = cc_to_error[cc]; 394 if (ep->nextpid == USB_PID_ACK) 395 ep->nextpid = 0; 396 goto done; 397 } 398 /* According to usb spec, zero-length Int transfer signals 399 finishing of the urb. Hey, does this apply only 400 for IN endpoints? */ 401 if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) { 402 status = 0; 403 goto done; 404 } 405 406 /* Relax after previously failed, but later succeeded 407 or correctly NAK'ed retransmission attempt */ 408 if (ep->error_count 409 && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED)) 410 ep->error_count = 0; 411 412 /* Take into account idiosyncracies of the isp116x chip 413 regarding toggle bit for failed transfers */ 414 if (ep->nextpid == USB_PID_OUT) 415 usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd) 416 ^ (ep->error_count > 0)); 417 else if (ep->nextpid == USB_PID_IN) 418 usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd) 419 ^ (ep->error_count > 0)); 420 421 switch (ep->nextpid) { 422 case USB_PID_IN: 423 case USB_PID_OUT: 424 urb->actual_length += PTD_GET_COUNT(ptd); 425 if (PTD_GET_ACTIVE(ptd) 426 || (cc != TD_CC_NOERROR && cc < 0x0E)) 427 break; 428 if (urb->transfer_buffer_length != urb->actual_length) { 429 if (short_not_ok) 430 break; 431 } else { 432 if (urb->transfer_flags & URB_ZERO_PACKET 433 && ep->nextpid == USB_PID_OUT 434 && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) { 435 DBG("Zero packet requested\n"); 436 break; 437 } 438 } 439 /* All data for this URB is transferred, let's finish */ 440 if (usb_pipecontrol(urb->pipe)) 441 ep->nextpid = USB_PID_ACK; 442 else 443 status = 0; 444 break; 445 case USB_PID_SETUP: 446 if (PTD_GET_ACTIVE(ptd) 447 || (cc != TD_CC_NOERROR && cc < 0x0E)) 448 break; 449 if (urb->transfer_buffer_length == urb->actual_length) 450 ep->nextpid = USB_PID_ACK; 451 else if (usb_pipeout(urb->pipe)) { 452 usb_settoggle(udev, 0, 1, 1); 453 ep->nextpid = USB_PID_OUT; 454 } else { 455 usb_settoggle(udev, 0, 0, 1); 456 ep->nextpid = USB_PID_IN; 457 } 458 break; 459 case USB_PID_ACK: 460 if (PTD_GET_ACTIVE(ptd) 461 || (cc != TD_CC_NOERROR && cc < 0x0E)) 462 break; 463 status = 0; 464 ep->nextpid = 0; 465 break; 466 default: 467 BUG(); 468 } 469 470 done: 471 if (status != -EINPROGRESS || urb->unlinked) 472 finish_request(isp116x, ep, urb, status); 473 } 474 } 475 476 /* 477 Scan transfer lists, schedule transfers, send data off 478 to chip. 479 */ 480 static void start_atl_transfers(struct isp116x *isp116x) 481 { 482 struct isp116x_ep *last_ep = NULL, *ep; 483 struct urb *urb; 484 u16 load = 0; 485 int len, index, speed, byte_time; 486 487 if (atomic_read(&isp116x->atl_finishing)) 488 return; 489 490 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) 491 return; 492 493 /* FIFO not empty? */ 494 if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL) 495 return; 496 497 isp116x->atl_active = NULL; 498 isp116x->atl_buflen = isp116x->atl_bufshrt = 0; 499 500 /* Schedule int transfers */ 501 if (isp116x->periodic_count) { 502 isp116x->fmindex = index = 503 (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1); 504 load = isp116x->load[index]; 505 if (load) { 506 /* Bring all int transfers for this frame 507 into the active queue */ 508 isp116x->atl_active = last_ep = 509 isp116x->periodic[index]; 510 while (last_ep->next) 511 last_ep = (last_ep->active = last_ep->next); 512 last_ep->active = NULL; 513 } 514 } 515 516 /* Schedule control/bulk transfers */ 517 list_for_each_entry(ep, &isp116x->async, schedule) { 518 urb = container_of(ep->hep->urb_list.next, 519 struct urb, urb_list); 520 speed = urb->dev->speed; 521 byte_time = speed == USB_SPEED_LOW 522 ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED; 523 524 if (ep->nextpid == USB_PID_SETUP) { 525 len = sizeof(struct usb_ctrlrequest); 526 } else if (ep->nextpid == USB_PID_ACK) { 527 len = 0; 528 } else { 529 /* Find current free length ... */ 530 len = (MAX_LOAD_LIMIT - load) / byte_time; 531 532 /* ... then limit it to configured max size ... */ 533 len = min(len, speed == USB_SPEED_LOW ? 534 MAX_TRANSFER_SIZE_LOWSPEED : 535 MAX_TRANSFER_SIZE_FULLSPEED); 536 537 /* ... and finally cut to the multiple of MaxPacketSize, 538 or to the real length if there's enough room. */ 539 if (len < 540 (urb->transfer_buffer_length - 541 urb->actual_length)) { 542 len -= len % ep->maxpacket; 543 if (!len) 544 continue; 545 } else 546 len = urb->transfer_buffer_length - 547 urb->actual_length; 548 BUG_ON(len < 0); 549 } 550 551 load += len * byte_time; 552 if (load > MAX_LOAD_LIMIT) 553 break; 554 555 ep->active = NULL; 556 ep->length = len; 557 if (last_ep) 558 last_ep->active = ep; 559 else 560 isp116x->atl_active = ep; 561 last_ep = ep; 562 } 563 564 /* Avoid starving of endpoints */ 565 if ((&isp116x->async)->next != (&isp116x->async)->prev) 566 list_move(&isp116x->async, (&isp116x->async)->next); 567 568 if (isp116x->atl_active) { 569 preproc_atl_queue(isp116x); 570 pack_fifo(isp116x); 571 } 572 } 573 574 /* 575 Finish the processed transfers 576 */ 577 static void finish_atl_transfers(struct isp116x *isp116x) 578 { 579 if (!isp116x->atl_active) 580 return; 581 /* Fifo not ready? */ 582 if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE)) 583 return; 584 585 atomic_inc(&isp116x->atl_finishing); 586 unpack_fifo(isp116x); 587 postproc_atl_queue(isp116x); 588 atomic_dec(&isp116x->atl_finishing); 589 } 590 591 static irqreturn_t isp116x_irq(struct usb_hcd *hcd) 592 { 593 struct isp116x *isp116x = hcd_to_isp116x(hcd); 594 u16 irqstat; 595 irqreturn_t ret = IRQ_NONE; 596 597 spin_lock(&isp116x->lock); 598 isp116x_write_reg16(isp116x, HCuPINTENB, 0); 599 irqstat = isp116x_read_reg16(isp116x, HCuPINT); 600 isp116x_write_reg16(isp116x, HCuPINT, irqstat); 601 602 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) { 603 ret = IRQ_HANDLED; 604 finish_atl_transfers(isp116x); 605 } 606 607 if (irqstat & HCuPINT_OPR) { 608 u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT); 609 isp116x_write_reg32(isp116x, HCINTSTAT, intstat); 610 if (intstat & HCINT_UE) { 611 ERR("Unrecoverable error, HC is dead!\n"); 612 /* IRQ's are off, we do no DMA, 613 perfectly ready to die ... */ 614 hcd->state = HC_STATE_HALT; 615 usb_hc_died(hcd); 616 ret = IRQ_HANDLED; 617 goto done; 618 } 619 if (intstat & HCINT_RHSC) 620 /* When root hub or any of its ports is going 621 to come out of suspend, it may take more 622 than 10ms for status bits to stabilize. */ 623 mod_timer(&hcd->rh_timer, jiffies 624 + msecs_to_jiffies(20) + 1); 625 if (intstat & HCINT_RD) { 626 DBG("---- remote wakeup\n"); 627 usb_hcd_resume_root_hub(hcd); 628 } 629 irqstat &= ~HCuPINT_OPR; 630 ret = IRQ_HANDLED; 631 } 632 633 if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) { 634 start_atl_transfers(isp116x); 635 } 636 637 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb); 638 done: 639 spin_unlock(&isp116x->lock); 640 return ret; 641 } 642 643 /*-----------------------------------------------------------------*/ 644 645 /* usb 1.1 says max 90% of a frame is available for periodic transfers. 646 * this driver doesn't promise that much since it's got to handle an 647 * IRQ per packet; irq handling latencies also use up that time. 648 */ 649 650 /* out of 1000 us */ 651 #define MAX_PERIODIC_LOAD 600 652 static int balance(struct isp116x *isp116x, u16 period, u16 load) 653 { 654 int i, branch = -ENOSPC; 655 656 /* search for the least loaded schedule branch of that period 657 which has enough bandwidth left unreserved. */ 658 for (i = 0; i < period; i++) { 659 if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) { 660 int j; 661 662 for (j = i; j < PERIODIC_SIZE; j += period) { 663 if ((isp116x->load[j] + load) 664 > MAX_PERIODIC_LOAD) 665 break; 666 } 667 if (j < PERIODIC_SIZE) 668 continue; 669 branch = i; 670 } 671 } 672 return branch; 673 } 674 675 /* NB! ALL the code above this point runs with isp116x->lock 676 held, irqs off 677 */ 678 679 /*-----------------------------------------------------------------*/ 680 681 static int isp116x_urb_enqueue(struct usb_hcd *hcd, 682 struct urb *urb, 683 gfp_t mem_flags) 684 { 685 struct isp116x *isp116x = hcd_to_isp116x(hcd); 686 struct usb_device *udev = urb->dev; 687 unsigned int pipe = urb->pipe; 688 int is_out = !usb_pipein(pipe); 689 int type = usb_pipetype(pipe); 690 int epnum = usb_pipeendpoint(pipe); 691 struct usb_host_endpoint *hep = urb->ep; 692 struct isp116x_ep *ep = NULL; 693 unsigned long flags; 694 int i; 695 int ret = 0; 696 697 urb_dbg(urb, "Enqueue"); 698 699 if (type == PIPE_ISOCHRONOUS) { 700 ERR("Isochronous transfers not supported\n"); 701 urb_dbg(urb, "Refused to enqueue"); 702 return -ENXIO; 703 } 704 /* avoid all allocations within spinlocks: request or endpoint */ 705 if (!hep->hcpriv) { 706 ep = kzalloc(sizeof *ep, mem_flags); 707 if (!ep) 708 return -ENOMEM; 709 } 710 711 spin_lock_irqsave(&isp116x->lock, flags); 712 if (!HC_IS_RUNNING(hcd->state)) { 713 kfree(ep); 714 ret = -ENODEV; 715 goto fail_not_linked; 716 } 717 ret = usb_hcd_link_urb_to_ep(hcd, urb); 718 if (ret) { 719 kfree(ep); 720 goto fail_not_linked; 721 } 722 723 if (hep->hcpriv) 724 ep = hep->hcpriv; 725 else { 726 INIT_LIST_HEAD(&ep->schedule); 727 ep->udev = udev; 728 ep->epnum = epnum; 729 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); 730 usb_settoggle(udev, epnum, is_out, 0); 731 732 if (type == PIPE_CONTROL) { 733 ep->nextpid = USB_PID_SETUP; 734 } else if (is_out) { 735 ep->nextpid = USB_PID_OUT; 736 } else { 737 ep->nextpid = USB_PID_IN; 738 } 739 740 if (urb->interval) { 741 /* 742 With INT URBs submitted, the driver works with SOF 743 interrupt enabled and ATL interrupt disabled. After 744 the PTDs are written to fifo ram, the chip starts 745 fifo processing and usb transfers after the next 746 SOF and continues until the transfers are finished 747 (succeeded or failed) or the frame ends. Therefore, 748 the transfers occur only in every second frame, 749 while fifo reading/writing and data processing 750 occur in every other second frame. */ 751 if (urb->interval < 2) 752 urb->interval = 2; 753 if (urb->interval > 2 * PERIODIC_SIZE) 754 urb->interval = 2 * PERIODIC_SIZE; 755 ep->period = urb->interval >> 1; 756 ep->branch = PERIODIC_SIZE; 757 ep->load = usb_calc_bus_time(udev->speed, 758 !is_out, 759 (type == PIPE_ISOCHRONOUS), 760 usb_maxpacket(udev, pipe, 761 is_out)) / 762 1000; 763 } 764 hep->hcpriv = ep; 765 ep->hep = hep; 766 } 767 768 /* maybe put endpoint into schedule */ 769 switch (type) { 770 case PIPE_CONTROL: 771 case PIPE_BULK: 772 if (list_empty(&ep->schedule)) 773 list_add_tail(&ep->schedule, &isp116x->async); 774 break; 775 case PIPE_INTERRUPT: 776 urb->interval = ep->period; 777 ep->length = min_t(u32, ep->maxpacket, 778 urb->transfer_buffer_length); 779 780 /* urb submitted for already existing endpoint */ 781 if (ep->branch < PERIODIC_SIZE) 782 break; 783 784 ep->branch = ret = balance(isp116x, ep->period, ep->load); 785 if (ret < 0) 786 goto fail; 787 ret = 0; 788 789 urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1)) 790 + ep->branch; 791 792 /* sort each schedule branch by period (slow before fast) 793 to share the faster parts of the tree without needing 794 dummy/placeholder nodes */ 795 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); 796 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { 797 struct isp116x_ep **prev = &isp116x->periodic[i]; 798 struct isp116x_ep *here = *prev; 799 800 while (here && ep != here) { 801 if (ep->period > here->period) 802 break; 803 prev = &here->next; 804 here = *prev; 805 } 806 if (ep != here) { 807 ep->next = here; 808 *prev = ep; 809 } 810 isp116x->load[i] += ep->load; 811 } 812 hcd->self.bandwidth_allocated += ep->load / ep->period; 813 814 /* switch over to SOFint */ 815 if (!isp116x->periodic_count++) { 816 isp116x->irqenb &= ~HCuPINT_ATL; 817 isp116x->irqenb |= HCuPINT_SOF; 818 isp116x_write_reg16(isp116x, HCuPINTENB, 819 isp116x->irqenb); 820 } 821 } 822 823 urb->hcpriv = hep; 824 start_atl_transfers(isp116x); 825 826 fail: 827 if (ret) 828 usb_hcd_unlink_urb_from_ep(hcd, urb); 829 fail_not_linked: 830 spin_unlock_irqrestore(&isp116x->lock, flags); 831 return ret; 832 } 833 834 /* 835 Dequeue URBs. 836 */ 837 static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, 838 int status) 839 { 840 struct isp116x *isp116x = hcd_to_isp116x(hcd); 841 struct usb_host_endpoint *hep; 842 struct isp116x_ep *ep, *ep_act; 843 unsigned long flags; 844 int rc; 845 846 spin_lock_irqsave(&isp116x->lock, flags); 847 rc = usb_hcd_check_unlink_urb(hcd, urb, status); 848 if (rc) 849 goto done; 850 851 hep = urb->hcpriv; 852 ep = hep->hcpriv; 853 WARN_ON(hep != ep->hep); 854 855 /* In front of queue? */ 856 if (ep->hep->urb_list.next == &urb->urb_list) 857 /* active? */ 858 for (ep_act = isp116x->atl_active; ep_act; 859 ep_act = ep_act->active) 860 if (ep_act == ep) { 861 VDBG("dequeue, urb %p active; wait for irq\n", 862 urb); 863 urb = NULL; 864 break; 865 } 866 867 if (urb) 868 finish_request(isp116x, ep, urb, status); 869 done: 870 spin_unlock_irqrestore(&isp116x->lock, flags); 871 return rc; 872 } 873 874 static void isp116x_endpoint_disable(struct usb_hcd *hcd, 875 struct usb_host_endpoint *hep) 876 { 877 int i; 878 struct isp116x_ep *ep = hep->hcpriv; 879 880 if (!ep) 881 return; 882 883 /* assume we'd just wait for the irq */ 884 for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++) 885 msleep(3); 886 if (!list_empty(&hep->urb_list)) 887 WARNING("ep %p not empty?\n", ep); 888 889 kfree(ep); 890 hep->hcpriv = NULL; 891 } 892 893 static int isp116x_get_frame(struct usb_hcd *hcd) 894 { 895 struct isp116x *isp116x = hcd_to_isp116x(hcd); 896 u32 fmnum; 897 unsigned long flags; 898 899 spin_lock_irqsave(&isp116x->lock, flags); 900 fmnum = isp116x_read_reg32(isp116x, HCFMNUM); 901 spin_unlock_irqrestore(&isp116x->lock, flags); 902 return (int)fmnum; 903 } 904 905 /* 906 Adapted from ohci-hub.c. Currently we don't support autosuspend. 907 */ 908 static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf) 909 { 910 struct isp116x *isp116x = hcd_to_isp116x(hcd); 911 int ports, i, changed = 0; 912 unsigned long flags; 913 914 if (!HC_IS_RUNNING(hcd->state)) 915 return -ESHUTDOWN; 916 917 /* Report no status change now, if we are scheduled to be 918 called later */ 919 if (timer_pending(&hcd->rh_timer)) 920 return 0; 921 922 ports = isp116x->rhdesca & RH_A_NDP; 923 spin_lock_irqsave(&isp116x->lock, flags); 924 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS); 925 if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC)) 926 buf[0] = changed = 1; 927 else 928 buf[0] = 0; 929 930 for (i = 0; i < ports; i++) { 931 u32 status = isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1); 932 933 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC 934 | RH_PS_OCIC | RH_PS_PRSC)) { 935 changed = 1; 936 buf[0] |= 1 << (i + 1); 937 } 938 } 939 spin_unlock_irqrestore(&isp116x->lock, flags); 940 return changed; 941 } 942 943 static void isp116x_hub_descriptor(struct isp116x *isp116x, 944 struct usb_hub_descriptor *desc) 945 { 946 u32 reg = isp116x->rhdesca; 947 948 desc->bDescriptorType = USB_DT_HUB; 949 desc->bDescLength = 9; 950 desc->bHubContrCurrent = 0; 951 desc->bNbrPorts = (u8) (reg & 0x3); 952 /* Power switching, device type, overcurrent. */ 953 desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 954 (HUB_CHAR_LPSM | 955 HUB_CHAR_COMPOUND | 956 HUB_CHAR_OCPM))); 957 desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff); 958 /* ports removable, and legacy PortPwrCtrlMask */ 959 desc->u.hs.DeviceRemovable[0] = 0; 960 desc->u.hs.DeviceRemovable[1] = ~0; 961 } 962 963 /* Perform reset of a given port. 964 It would be great to just start the reset and let the 965 USB core to clear the reset in due time. However, 966 root hub ports should be reset for at least 50 ms, while 967 our chip stays in reset for about 10 ms. I.e., we must 968 repeatedly reset it ourself here. 969 */ 970 static inline void root_port_reset(struct isp116x *isp116x, unsigned port) 971 { 972 u32 tmp; 973 unsigned long flags, t; 974 975 /* Root hub reset should be 50 ms, but some devices 976 want it even longer. */ 977 t = jiffies + msecs_to_jiffies(100); 978 979 while (time_before(jiffies, t)) { 980 spin_lock_irqsave(&isp116x->lock, flags); 981 /* spin until any current reset finishes */ 982 for (;;) { 983 tmp = isp116x_read_reg32(isp116x, port ? 984 HCRHPORT2 : HCRHPORT1); 985 if (!(tmp & RH_PS_PRS)) 986 break; 987 udelay(500); 988 } 989 /* Don't reset a disconnected port */ 990 if (!(tmp & RH_PS_CCS)) { 991 spin_unlock_irqrestore(&isp116x->lock, flags); 992 break; 993 } 994 /* Reset lasts 10ms (claims datasheet) */ 995 isp116x_write_reg32(isp116x, port ? HCRHPORT2 : 996 HCRHPORT1, (RH_PS_PRS)); 997 spin_unlock_irqrestore(&isp116x->lock, flags); 998 msleep(10); 999 } 1000 } 1001 1002 /* Adapted from ohci-hub.c */ 1003 static int isp116x_hub_control(struct usb_hcd *hcd, 1004 u16 typeReq, 1005 u16 wValue, u16 wIndex, char *buf, u16 wLength) 1006 { 1007 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1008 int ret = 0; 1009 unsigned long flags; 1010 int ports = isp116x->rhdesca & RH_A_NDP; 1011 u32 tmp = 0; 1012 1013 switch (typeReq) { 1014 case ClearHubFeature: 1015 DBG("ClearHubFeature: "); 1016 switch (wValue) { 1017 case C_HUB_OVER_CURRENT: 1018 DBG("C_HUB_OVER_CURRENT\n"); 1019 spin_lock_irqsave(&isp116x->lock, flags); 1020 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC); 1021 spin_unlock_irqrestore(&isp116x->lock, flags); 1022 fallthrough; 1023 case C_HUB_LOCAL_POWER: 1024 DBG("C_HUB_LOCAL_POWER\n"); 1025 break; 1026 default: 1027 goto error; 1028 } 1029 break; 1030 case SetHubFeature: 1031 DBG("SetHubFeature: "); 1032 switch (wValue) { 1033 case C_HUB_OVER_CURRENT: 1034 case C_HUB_LOCAL_POWER: 1035 DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n"); 1036 break; 1037 default: 1038 goto error; 1039 } 1040 break; 1041 case GetHubDescriptor: 1042 DBG("GetHubDescriptor\n"); 1043 isp116x_hub_descriptor(isp116x, 1044 (struct usb_hub_descriptor *)buf); 1045 break; 1046 case GetHubStatus: 1047 DBG("GetHubStatus\n"); 1048 *(__le32 *) buf = 0; 1049 break; 1050 case GetPortStatus: 1051 DBG("GetPortStatus\n"); 1052 if (!wIndex || wIndex > ports) 1053 goto error; 1054 spin_lock_irqsave(&isp116x->lock, flags); 1055 tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1); 1056 spin_unlock_irqrestore(&isp116x->lock, flags); 1057 *(__le32 *) buf = cpu_to_le32(tmp); 1058 DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp); 1059 break; 1060 case ClearPortFeature: 1061 DBG("ClearPortFeature: "); 1062 if (!wIndex || wIndex > ports) 1063 goto error; 1064 wIndex--; 1065 1066 switch (wValue) { 1067 case USB_PORT_FEAT_ENABLE: 1068 DBG("USB_PORT_FEAT_ENABLE\n"); 1069 tmp = RH_PS_CCS; 1070 break; 1071 case USB_PORT_FEAT_C_ENABLE: 1072 DBG("USB_PORT_FEAT_C_ENABLE\n"); 1073 tmp = RH_PS_PESC; 1074 break; 1075 case USB_PORT_FEAT_SUSPEND: 1076 DBG("USB_PORT_FEAT_SUSPEND\n"); 1077 tmp = RH_PS_POCI; 1078 break; 1079 case USB_PORT_FEAT_C_SUSPEND: 1080 DBG("USB_PORT_FEAT_C_SUSPEND\n"); 1081 tmp = RH_PS_PSSC; 1082 break; 1083 case USB_PORT_FEAT_POWER: 1084 DBG("USB_PORT_FEAT_POWER\n"); 1085 tmp = RH_PS_LSDA; 1086 break; 1087 case USB_PORT_FEAT_C_CONNECTION: 1088 DBG("USB_PORT_FEAT_C_CONNECTION\n"); 1089 tmp = RH_PS_CSC; 1090 break; 1091 case USB_PORT_FEAT_C_OVER_CURRENT: 1092 DBG("USB_PORT_FEAT_C_OVER_CURRENT\n"); 1093 tmp = RH_PS_OCIC; 1094 break; 1095 case USB_PORT_FEAT_C_RESET: 1096 DBG("USB_PORT_FEAT_C_RESET\n"); 1097 tmp = RH_PS_PRSC; 1098 break; 1099 default: 1100 goto error; 1101 } 1102 spin_lock_irqsave(&isp116x->lock, flags); 1103 isp116x_write_reg32(isp116x, wIndex 1104 ? HCRHPORT2 : HCRHPORT1, tmp); 1105 spin_unlock_irqrestore(&isp116x->lock, flags); 1106 break; 1107 case SetPortFeature: 1108 DBG("SetPortFeature: "); 1109 if (!wIndex || wIndex > ports) 1110 goto error; 1111 wIndex--; 1112 switch (wValue) { 1113 case USB_PORT_FEAT_SUSPEND: 1114 DBG("USB_PORT_FEAT_SUSPEND\n"); 1115 spin_lock_irqsave(&isp116x->lock, flags); 1116 isp116x_write_reg32(isp116x, wIndex 1117 ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS); 1118 spin_unlock_irqrestore(&isp116x->lock, flags); 1119 break; 1120 case USB_PORT_FEAT_POWER: 1121 DBG("USB_PORT_FEAT_POWER\n"); 1122 spin_lock_irqsave(&isp116x->lock, flags); 1123 isp116x_write_reg32(isp116x, wIndex 1124 ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS); 1125 spin_unlock_irqrestore(&isp116x->lock, flags); 1126 break; 1127 case USB_PORT_FEAT_RESET: 1128 DBG("USB_PORT_FEAT_RESET\n"); 1129 root_port_reset(isp116x, wIndex); 1130 break; 1131 default: 1132 goto error; 1133 } 1134 break; 1135 1136 default: 1137 error: 1138 /* "protocol stall" on error */ 1139 DBG("PROTOCOL STALL\n"); 1140 ret = -EPIPE; 1141 } 1142 return ret; 1143 } 1144 1145 /*-----------------------------------------------------------------*/ 1146 1147 #ifdef CONFIG_DEBUG_FS 1148 1149 static void dump_irq(struct seq_file *s, char *label, u16 mask) 1150 { 1151 seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask, 1152 mask & HCuPINT_CLKRDY ? " clkrdy" : "", 1153 mask & HCuPINT_SUSP ? " susp" : "", 1154 mask & HCuPINT_OPR ? " opr" : "", 1155 mask & HCuPINT_AIIEOT ? " eot" : "", 1156 mask & HCuPINT_ATL ? " atl" : "", 1157 mask & HCuPINT_SOF ? " sof" : ""); 1158 } 1159 1160 static void dump_int(struct seq_file *s, char *label, u32 mask) 1161 { 1162 seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask, 1163 mask & HCINT_MIE ? " MIE" : "", 1164 mask & HCINT_RHSC ? " rhsc" : "", 1165 mask & HCINT_FNO ? " fno" : "", 1166 mask & HCINT_UE ? " ue" : "", 1167 mask & HCINT_RD ? " rd" : "", 1168 mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : ""); 1169 } 1170 1171 static int isp116x_debug_show(struct seq_file *s, void *unused) 1172 { 1173 struct isp116x *isp116x = s->private; 1174 1175 seq_printf(s, "%s\n%s version %s\n", 1176 isp116x_to_hcd(isp116x)->product_desc, hcd_name, 1177 DRIVER_VERSION); 1178 1179 if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) { 1180 seq_printf(s, "HCD is suspended\n"); 1181 return 0; 1182 } 1183 if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) { 1184 seq_printf(s, "HCD not running\n"); 1185 return 0; 1186 } 1187 1188 spin_lock_irq(&isp116x->lock); 1189 dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB)); 1190 dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT)); 1191 dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB)); 1192 dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT)); 1193 isp116x_show_regs_seq(isp116x, s); 1194 spin_unlock_irq(&isp116x->lock); 1195 seq_printf(s, "\n"); 1196 1197 return 0; 1198 } 1199 DEFINE_SHOW_ATTRIBUTE(isp116x_debug); 1200 1201 static void create_debug_file(struct isp116x *isp116x) 1202 { 1203 debugfs_create_file(hcd_name, S_IRUGO, usb_debug_root, isp116x, 1204 &isp116x_debug_fops); 1205 } 1206 1207 static void remove_debug_file(struct isp116x *isp116x) 1208 { 1209 debugfs_remove(debugfs_lookup(hcd_name, usb_debug_root)); 1210 } 1211 1212 #else 1213 1214 static inline void create_debug_file(struct isp116x *isp116x) { } 1215 static inline void remove_debug_file(struct isp116x *isp116x) { } 1216 1217 #endif /* CONFIG_DEBUG_FS */ 1218 1219 /*-----------------------------------------------------------------*/ 1220 1221 /* 1222 Software reset - can be called from any contect. 1223 */ 1224 static int isp116x_sw_reset(struct isp116x *isp116x) 1225 { 1226 int retries = 15; 1227 unsigned long flags; 1228 int ret = 0; 1229 1230 spin_lock_irqsave(&isp116x->lock, flags); 1231 isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC); 1232 isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR); 1233 while (--retries) { 1234 /* It usually resets within 1 ms */ 1235 mdelay(1); 1236 if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR)) 1237 break; 1238 } 1239 if (!retries) { 1240 ERR("Software reset timeout\n"); 1241 ret = -ETIME; 1242 } 1243 spin_unlock_irqrestore(&isp116x->lock, flags); 1244 return ret; 1245 } 1246 1247 static int isp116x_reset(struct usb_hcd *hcd) 1248 { 1249 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1250 unsigned long t; 1251 u16 clkrdy = 0; 1252 int ret, timeout = 15 /* ms */ ; 1253 1254 ret = isp116x_sw_reset(isp116x); 1255 if (ret) 1256 return ret; 1257 1258 t = jiffies + msecs_to_jiffies(timeout); 1259 while (time_before_eq(jiffies, t)) { 1260 msleep(4); 1261 spin_lock_irq(&isp116x->lock); 1262 clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY; 1263 spin_unlock_irq(&isp116x->lock); 1264 if (clkrdy) 1265 break; 1266 } 1267 if (!clkrdy) { 1268 ERR("Clock not ready after %dms\n", timeout); 1269 /* After sw_reset the clock won't report to be ready, if 1270 H_WAKEUP pin is high. */ 1271 ERR("Please make sure that the H_WAKEUP pin is pulled low!\n"); 1272 ret = -ENODEV; 1273 } 1274 return ret; 1275 } 1276 1277 static void isp116x_stop(struct usb_hcd *hcd) 1278 { 1279 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1280 unsigned long flags; 1281 u32 val; 1282 1283 spin_lock_irqsave(&isp116x->lock, flags); 1284 isp116x_write_reg16(isp116x, HCuPINTENB, 0); 1285 1286 /* Switch off ports' power, some devices don't come up 1287 after next 'insmod' without this */ 1288 val = isp116x_read_reg32(isp116x, HCRHDESCA); 1289 val &= ~(RH_A_NPS | RH_A_PSM); 1290 isp116x_write_reg32(isp116x, HCRHDESCA, val); 1291 isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS); 1292 spin_unlock_irqrestore(&isp116x->lock, flags); 1293 1294 isp116x_sw_reset(isp116x); 1295 } 1296 1297 /* 1298 Configure the chip. The chip must be successfully reset by now. 1299 */ 1300 static int isp116x_start(struct usb_hcd *hcd) 1301 { 1302 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1303 struct isp116x_platform_data *board = isp116x->board; 1304 u32 val; 1305 unsigned long flags; 1306 1307 spin_lock_irqsave(&isp116x->lock, flags); 1308 1309 /* clear interrupt status and disable all interrupt sources */ 1310 isp116x_write_reg16(isp116x, HCuPINT, 0xff); 1311 isp116x_write_reg16(isp116x, HCuPINTENB, 0); 1312 1313 val = isp116x_read_reg16(isp116x, HCCHIPID); 1314 if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) { 1315 ERR("Invalid chip ID %04x\n", val); 1316 spin_unlock_irqrestore(&isp116x->lock, flags); 1317 return -ENODEV; 1318 } 1319 1320 /* To be removed in future */ 1321 hcd->uses_new_polling = 1; 1322 1323 isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE); 1324 isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE); 1325 1326 /* ----- HW conf */ 1327 val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1); 1328 if (board->sel15Kres) 1329 val |= HCHWCFG_15KRSEL; 1330 /* Remote wakeup won't work without working clock */ 1331 if (board->remote_wakeup_enable) 1332 val |= HCHWCFG_CLKNOTSTOP; 1333 if (board->oc_enable) 1334 val |= HCHWCFG_ANALOG_OC; 1335 if (board->int_act_high) 1336 val |= HCHWCFG_INT_POL; 1337 if (board->int_edge_triggered) 1338 val |= HCHWCFG_INT_TRIGGER; 1339 isp116x_write_reg16(isp116x, HCHWCFG, val); 1340 1341 /* ----- Root hub conf */ 1342 val = (25 << 24) & RH_A_POTPGT; 1343 /* AN10003_1.pdf recommends RH_A_NPS (no power switching) to 1344 be always set. Yet, instead, we request individual port 1345 power switching. */ 1346 val |= RH_A_PSM; 1347 /* Report overcurrent per port */ 1348 val |= RH_A_OCPM; 1349 isp116x_write_reg32(isp116x, HCRHDESCA, val); 1350 isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA); 1351 1352 val = RH_B_PPCM; 1353 isp116x_write_reg32(isp116x, HCRHDESCB, val); 1354 isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB); 1355 1356 val = 0; 1357 if (board->remote_wakeup_enable) { 1358 if (!device_can_wakeup(hcd->self.controller)) 1359 device_init_wakeup(hcd->self.controller, 1); 1360 val |= RH_HS_DRWE; 1361 } 1362 isp116x_write_reg32(isp116x, HCRHSTATUS, val); 1363 isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS); 1364 1365 isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf); 1366 1367 hcd->state = HC_STATE_RUNNING; 1368 1369 /* Set up interrupts */ 1370 isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE; 1371 if (board->remote_wakeup_enable) 1372 isp116x->intenb |= HCINT_RD; 1373 isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */ 1374 isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb); 1375 isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb); 1376 1377 /* Go operational */ 1378 val = HCCONTROL_USB_OPER; 1379 if (board->remote_wakeup_enable) 1380 val |= HCCONTROL_RWE; 1381 isp116x_write_reg32(isp116x, HCCONTROL, val); 1382 1383 /* Disable ports to avoid race in device enumeration */ 1384 isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS); 1385 isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS); 1386 1387 isp116x_show_regs_log(isp116x); 1388 spin_unlock_irqrestore(&isp116x->lock, flags); 1389 return 0; 1390 } 1391 1392 #ifdef CONFIG_PM 1393 1394 static int isp116x_bus_suspend(struct usb_hcd *hcd) 1395 { 1396 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1397 unsigned long flags; 1398 u32 val; 1399 int ret = 0; 1400 1401 spin_lock_irqsave(&isp116x->lock, flags); 1402 val = isp116x_read_reg32(isp116x, HCCONTROL); 1403 1404 switch (val & HCCONTROL_HCFS) { 1405 case HCCONTROL_USB_OPER: 1406 spin_unlock_irqrestore(&isp116x->lock, flags); 1407 val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE); 1408 val |= HCCONTROL_USB_SUSPEND; 1409 if (hcd->self.root_hub->do_remote_wakeup) 1410 val |= HCCONTROL_RWE; 1411 /* Wait for usb transfers to finish */ 1412 msleep(2); 1413 spin_lock_irqsave(&isp116x->lock, flags); 1414 isp116x_write_reg32(isp116x, HCCONTROL, val); 1415 spin_unlock_irqrestore(&isp116x->lock, flags); 1416 /* Wait for devices to suspend */ 1417 msleep(5); 1418 break; 1419 case HCCONTROL_USB_RESUME: 1420 isp116x_write_reg32(isp116x, HCCONTROL, 1421 (val & ~HCCONTROL_HCFS) | 1422 HCCONTROL_USB_RESET); 1423 fallthrough; 1424 case HCCONTROL_USB_RESET: 1425 ret = -EBUSY; 1426 fallthrough; 1427 default: /* HCCONTROL_USB_SUSPEND */ 1428 spin_unlock_irqrestore(&isp116x->lock, flags); 1429 break; 1430 } 1431 1432 return ret; 1433 } 1434 1435 static int isp116x_bus_resume(struct usb_hcd *hcd) 1436 { 1437 struct isp116x *isp116x = hcd_to_isp116x(hcd); 1438 u32 val; 1439 1440 msleep(5); 1441 spin_lock_irq(&isp116x->lock); 1442 1443 val = isp116x_read_reg32(isp116x, HCCONTROL); 1444 switch (val & HCCONTROL_HCFS) { 1445 case HCCONTROL_USB_SUSPEND: 1446 val &= ~HCCONTROL_HCFS; 1447 val |= HCCONTROL_USB_RESUME; 1448 isp116x_write_reg32(isp116x, HCCONTROL, val); 1449 break; 1450 case HCCONTROL_USB_RESUME: 1451 break; 1452 case HCCONTROL_USB_OPER: 1453 spin_unlock_irq(&isp116x->lock); 1454 return 0; 1455 default: 1456 /* HCCONTROL_USB_RESET: this may happen, when during 1457 suspension the HC lost power. Reinitialize completely */ 1458 spin_unlock_irq(&isp116x->lock); 1459 DBG("Chip has been reset while suspended. Reinit from scratch.\n"); 1460 isp116x_reset(hcd); 1461 isp116x_start(hcd); 1462 isp116x_hub_control(hcd, SetPortFeature, 1463 USB_PORT_FEAT_POWER, 1, NULL, 0); 1464 if ((isp116x->rhdesca & RH_A_NDP) == 2) 1465 isp116x_hub_control(hcd, SetPortFeature, 1466 USB_PORT_FEAT_POWER, 2, NULL, 0); 1467 return 0; 1468 } 1469 1470 val = isp116x->rhdesca & RH_A_NDP; 1471 while (val--) { 1472 u32 stat = 1473 isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1); 1474 /* force global, not selective, resume */ 1475 if (!(stat & RH_PS_PSS)) 1476 continue; 1477 DBG("%s: Resuming port %d\n", __func__, val); 1478 isp116x_write_reg32(isp116x, RH_PS_POCI, val 1479 ? HCRHPORT2 : HCRHPORT1); 1480 } 1481 spin_unlock_irq(&isp116x->lock); 1482 1483 hcd->state = HC_STATE_RESUMING; 1484 msleep(USB_RESUME_TIMEOUT); 1485 1486 /* Go operational */ 1487 spin_lock_irq(&isp116x->lock); 1488 val = isp116x_read_reg32(isp116x, HCCONTROL); 1489 isp116x_write_reg32(isp116x, HCCONTROL, 1490 (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER); 1491 spin_unlock_irq(&isp116x->lock); 1492 hcd->state = HC_STATE_RUNNING; 1493 1494 return 0; 1495 } 1496 1497 #else 1498 1499 #define isp116x_bus_suspend NULL 1500 #define isp116x_bus_resume NULL 1501 1502 #endif 1503 1504 static const struct hc_driver isp116x_hc_driver = { 1505 .description = hcd_name, 1506 .product_desc = "ISP116x Host Controller", 1507 .hcd_priv_size = sizeof(struct isp116x), 1508 1509 .irq = isp116x_irq, 1510 .flags = HCD_USB11, 1511 1512 .reset = isp116x_reset, 1513 .start = isp116x_start, 1514 .stop = isp116x_stop, 1515 1516 .urb_enqueue = isp116x_urb_enqueue, 1517 .urb_dequeue = isp116x_urb_dequeue, 1518 .endpoint_disable = isp116x_endpoint_disable, 1519 1520 .get_frame_number = isp116x_get_frame, 1521 1522 .hub_status_data = isp116x_hub_status_data, 1523 .hub_control = isp116x_hub_control, 1524 .bus_suspend = isp116x_bus_suspend, 1525 .bus_resume = isp116x_bus_resume, 1526 }; 1527 1528 /*----------------------------------------------------------------*/ 1529 1530 static int isp116x_remove(struct platform_device *pdev) 1531 { 1532 struct usb_hcd *hcd = platform_get_drvdata(pdev); 1533 struct isp116x *isp116x; 1534 struct resource *res; 1535 1536 if (!hcd) 1537 return 0; 1538 isp116x = hcd_to_isp116x(hcd); 1539 remove_debug_file(isp116x); 1540 usb_remove_hcd(hcd); 1541 1542 iounmap(isp116x->data_reg); 1543 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1544 release_mem_region(res->start, 2); 1545 iounmap(isp116x->addr_reg); 1546 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1547 release_mem_region(res->start, 2); 1548 1549 usb_put_hcd(hcd); 1550 return 0; 1551 } 1552 1553 static int isp116x_probe(struct platform_device *pdev) 1554 { 1555 struct usb_hcd *hcd; 1556 struct isp116x *isp116x; 1557 struct resource *addr, *data, *ires; 1558 void __iomem *addr_reg; 1559 void __iomem *data_reg; 1560 int irq; 1561 int ret = 0; 1562 unsigned long irqflags; 1563 1564 if (usb_disabled()) 1565 return -ENODEV; 1566 1567 if (pdev->num_resources < 3) { 1568 ret = -ENODEV; 1569 goto err1; 1570 } 1571 1572 data = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1573 addr = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1574 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 1575 1576 if (!addr || !data || !ires) { 1577 ret = -ENODEV; 1578 goto err1; 1579 } 1580 1581 irq = ires->start; 1582 irqflags = ires->flags & IRQF_TRIGGER_MASK; 1583 1584 if (!request_mem_region(addr->start, 2, hcd_name)) { 1585 ret = -EBUSY; 1586 goto err1; 1587 } 1588 addr_reg = ioremap(addr->start, resource_size(addr)); 1589 if (addr_reg == NULL) { 1590 ret = -ENOMEM; 1591 goto err2; 1592 } 1593 if (!request_mem_region(data->start, 2, hcd_name)) { 1594 ret = -EBUSY; 1595 goto err3; 1596 } 1597 data_reg = ioremap(data->start, resource_size(data)); 1598 if (data_reg == NULL) { 1599 ret = -ENOMEM; 1600 goto err4; 1601 } 1602 1603 /* allocate and initialize hcd */ 1604 hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev)); 1605 if (!hcd) { 1606 ret = -ENOMEM; 1607 goto err5; 1608 } 1609 /* this rsrc_start is bogus */ 1610 hcd->rsrc_start = addr->start; 1611 isp116x = hcd_to_isp116x(hcd); 1612 isp116x->data_reg = data_reg; 1613 isp116x->addr_reg = addr_reg; 1614 spin_lock_init(&isp116x->lock); 1615 INIT_LIST_HEAD(&isp116x->async); 1616 isp116x->board = dev_get_platdata(&pdev->dev); 1617 1618 if (!isp116x->board) { 1619 ERR("Platform data structure not initialized\n"); 1620 ret = -ENODEV; 1621 goto err6; 1622 } 1623 if (isp116x_check_platform_delay(isp116x)) { 1624 ERR("USE_PLATFORM_DELAY defined, but delay function not " 1625 "implemented.\n"); 1626 ERR("See comments in drivers/usb/host/isp116x-hcd.c\n"); 1627 ret = -ENODEV; 1628 goto err6; 1629 } 1630 1631 ret = usb_add_hcd(hcd, irq, irqflags); 1632 if (ret) 1633 goto err6; 1634 1635 device_wakeup_enable(hcd->self.controller); 1636 1637 create_debug_file(isp116x); 1638 1639 return 0; 1640 1641 err6: 1642 usb_put_hcd(hcd); 1643 err5: 1644 iounmap(data_reg); 1645 err4: 1646 release_mem_region(data->start, 2); 1647 err3: 1648 iounmap(addr_reg); 1649 err2: 1650 release_mem_region(addr->start, 2); 1651 err1: 1652 ERR("init error, %d\n", ret); 1653 return ret; 1654 } 1655 1656 #ifdef CONFIG_PM 1657 /* 1658 Suspend of platform device 1659 */ 1660 static int isp116x_suspend(struct platform_device *dev, pm_message_t state) 1661 { 1662 VDBG("%s: state %x\n", __func__, state.event); 1663 return 0; 1664 } 1665 1666 /* 1667 Resume platform device 1668 */ 1669 static int isp116x_resume(struct platform_device *dev) 1670 { 1671 VDBG("%s\n", __func__); 1672 return 0; 1673 } 1674 1675 #else 1676 1677 #define isp116x_suspend NULL 1678 #define isp116x_resume NULL 1679 1680 #endif 1681 1682 /* work with hotplug and coldplug */ 1683 MODULE_ALIAS("platform:isp116x-hcd"); 1684 1685 static struct platform_driver isp116x_driver = { 1686 .probe = isp116x_probe, 1687 .remove = isp116x_remove, 1688 .suspend = isp116x_suspend, 1689 .resume = isp116x_resume, 1690 .driver = { 1691 .name = hcd_name, 1692 }, 1693 }; 1694 1695 module_platform_driver(isp116x_driver); 1696