1 /* 2 * Freescale QUICC Engine USB Host Controller Driver 3 * 4 * Copyright (c) Freescale Semicondutor, Inc. 2006, 2011. 5 * Shlomi Gridish <gridish@freescale.com> 6 * Jerry Huang <Chang-Ming.Huang@freescale.com> 7 * Copyright (c) Logic Product Development, Inc. 2007 8 * Peter Barada <peterb@logicpd.com> 9 * Copyright (c) MontaVista Software, Inc. 2008. 10 * Anton Vorontsov <avorontsov@ru.mvista.com> 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/types.h> 20 #include <linux/spinlock.h> 21 #include <linux/delay.h> 22 #include <linux/errno.h> 23 #include <linux/list.h> 24 #include <linux/interrupt.h> 25 #include <linux/io.h> 26 #include <linux/usb.h> 27 #include <linux/usb/hcd.h> 28 #include <soc/fsl/qe/qe.h> 29 #include <asm/fsl_gtm.h> 30 #include "fhci.h" 31 32 static void recycle_frame(struct fhci_usb *usb, struct packet *pkt) 33 { 34 pkt->data = NULL; 35 pkt->len = 0; 36 pkt->status = USB_TD_OK; 37 pkt->info = 0; 38 pkt->priv_data = NULL; 39 40 cq_put(&usb->ep0->empty_frame_Q, pkt); 41 } 42 43 /* confirm submitted packet */ 44 void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt) 45 { 46 struct td *td; 47 struct packet *td_pkt; 48 struct ed *ed; 49 u32 trans_len; 50 bool td_done = false; 51 52 td = fhci_remove_td_from_frame(usb->actual_frame); 53 td_pkt = td->pkt; 54 trans_len = pkt->len; 55 td->status = pkt->status; 56 if (td->type == FHCI_TA_IN && td_pkt->info & PKT_DUMMY_PACKET) { 57 if ((td->data + td->actual_len) && trans_len) 58 memcpy(td->data + td->actual_len, pkt->data, 59 trans_len); 60 cq_put(&usb->ep0->dummy_packets_Q, pkt->data); 61 } 62 63 recycle_frame(usb, pkt); 64 65 ed = td->ed; 66 if (ed->mode == FHCI_TF_ISO) { 67 if (ed->td_list.next->next != &ed->td_list) { 68 struct td *td_next = 69 list_entry(ed->td_list.next->next, struct td, 70 node); 71 72 td_next->start_frame = usb->actual_frame->frame_num; 73 } 74 td->actual_len = trans_len; 75 td_done = true; 76 } else if ((td->status & USB_TD_ERROR) && 77 !(td->status & USB_TD_TX_ER_NAK)) { 78 /* 79 * There was an error on the transaction (but not NAK). 80 * If it is fatal error (data underrun, stall, bad pid or 3 81 * errors exceeded), mark this TD as done. 82 */ 83 if ((td->status & USB_TD_RX_DATA_UNDERUN) || 84 (td->status & USB_TD_TX_ER_STALL) || 85 (td->status & USB_TD_RX_ER_PID) || 86 (++td->error_cnt >= 3)) { 87 ed->state = FHCI_ED_HALTED; 88 td_done = true; 89 90 if (td->status & USB_TD_RX_DATA_UNDERUN) { 91 fhci_dbg(usb->fhci, "td err fu\n"); 92 td->toggle = !td->toggle; 93 td->actual_len += trans_len; 94 } else { 95 fhci_dbg(usb->fhci, "td err f!u\n"); 96 } 97 } else { 98 fhci_dbg(usb->fhci, "td err !f\n"); 99 /* it is not a fatal error -retry this transaction */ 100 td->nak_cnt = 0; 101 td->error_cnt++; 102 td->status = USB_TD_OK; 103 } 104 } else if (td->status & USB_TD_TX_ER_NAK) { 105 /* there was a NAK response */ 106 fhci_vdbg(usb->fhci, "td nack\n"); 107 td->nak_cnt++; 108 td->error_cnt = 0; 109 td->status = USB_TD_OK; 110 } else { 111 /* there was no error on transaction */ 112 td->error_cnt = 0; 113 td->nak_cnt = 0; 114 td->toggle = !td->toggle; 115 td->actual_len += trans_len; 116 117 if (td->len == td->actual_len) 118 td_done = true; 119 } 120 121 if (td_done) 122 fhci_move_td_from_ed_to_done_list(usb, ed); 123 } 124 125 /* 126 * Flush all transmitted packets from BDs 127 * This routine is called when disabling the USB port to flush all 128 * transmissions that are already scheduled in the BDs 129 */ 130 void fhci_flush_all_transmissions(struct fhci_usb *usb) 131 { 132 u8 mode; 133 struct td *td; 134 135 mode = in_8(&usb->fhci->regs->usb_usmod); 136 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN); 137 138 fhci_flush_bds(usb); 139 140 while ((td = fhci_peek_td_from_frame(usb->actual_frame)) != NULL) { 141 struct packet *pkt = td->pkt; 142 143 pkt->status = USB_TD_TX_ER_TIMEOUT; 144 fhci_transaction_confirm(usb, pkt); 145 } 146 147 usb->actual_frame->frame_status = FRAME_END_TRANSMISSION; 148 149 /* reset the event register */ 150 out_be16(&usb->fhci->regs->usb_usber, 0xffff); 151 /* enable the USB controller */ 152 out_8(&usb->fhci->regs->usb_usmod, mode | USB_MODE_EN); 153 } 154 155 /* 156 * This function forms the packet and transmit the packet. This function 157 * will handle all endpoint type:ISO,interrupt,control and bulk 158 */ 159 static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td) 160 { 161 u32 fw_transaction_time, len = 0; 162 struct packet *pkt; 163 u8 *data = NULL; 164 165 /* calcalate data address,len and toggle and then add the transaction */ 166 if (td->toggle == USB_TD_TOGGLE_CARRY) 167 td->toggle = ed->toggle_carry; 168 169 switch (ed->mode) { 170 case FHCI_TF_ISO: 171 len = td->len; 172 if (td->type != FHCI_TA_IN) 173 data = td->data; 174 break; 175 case FHCI_TF_CTRL: 176 case FHCI_TF_BULK: 177 len = min(td->len - td->actual_len, ed->max_pkt_size); 178 if (!((td->type == FHCI_TA_IN) && 179 ((len + td->actual_len) == td->len))) 180 data = td->data + td->actual_len; 181 break; 182 case FHCI_TF_INTR: 183 len = min(td->len, ed->max_pkt_size); 184 if (!((td->type == FHCI_TA_IN) && 185 ((td->len + CRC_SIZE) >= ed->max_pkt_size))) 186 data = td->data; 187 break; 188 default: 189 break; 190 } 191 192 if (usb->port_status == FHCI_PORT_FULL) 193 fw_transaction_time = (((len + PROTOCOL_OVERHEAD) * 11) >> 4); 194 else 195 fw_transaction_time = ((len + PROTOCOL_OVERHEAD) * 6); 196 197 /* check if there's enough space in this frame to submit this TD */ 198 if (usb->actual_frame->total_bytes + len + PROTOCOL_OVERHEAD >= 199 usb->max_bytes_per_frame) { 200 fhci_vdbg(usb->fhci, "not enough space in this frame: " 201 "%d %d %d\n", usb->actual_frame->total_bytes, len, 202 usb->max_bytes_per_frame); 203 return -1; 204 } 205 206 /* check if there's enough time in this frame to submit this TD */ 207 if (usb->actual_frame->frame_status != FRAME_IS_PREPARED && 208 (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION || 209 (fw_transaction_time + usb->sw_transaction_time >= 210 1000 - fhci_get_sof_timer_count(usb)))) { 211 fhci_dbg(usb->fhci, "not enough time in this frame\n"); 212 return -1; 213 } 214 215 /* update frame object fields before transmitting */ 216 pkt = cq_get(&usb->ep0->empty_frame_Q); 217 if (!pkt) { 218 fhci_dbg(usb->fhci, "there is no empty frame\n"); 219 return -1; 220 } 221 td->pkt = pkt; 222 223 pkt->info = 0; 224 if (data == NULL) { 225 data = cq_get(&usb->ep0->dummy_packets_Q); 226 BUG_ON(!data); 227 pkt->info = PKT_DUMMY_PACKET; 228 } 229 pkt->data = data; 230 pkt->len = len; 231 pkt->status = USB_TD_OK; 232 /* update TD status field before transmitting */ 233 td->status = USB_TD_INPROGRESS; 234 /* update actual frame time object with the actual transmission */ 235 usb->actual_frame->total_bytes += (len + PROTOCOL_OVERHEAD); 236 fhci_add_td_to_frame(usb->actual_frame, td); 237 238 if (usb->port_status != FHCI_PORT_FULL && 239 usb->port_status != FHCI_PORT_LOW) { 240 pkt->status = USB_TD_TX_ER_TIMEOUT; 241 pkt->len = 0; 242 fhci_transaction_confirm(usb, pkt); 243 } else if (fhci_host_transaction(usb, pkt, td->type, ed->dev_addr, 244 ed->ep_addr, ed->mode, ed->speed, td->toggle)) { 245 /* remove TD from actual frame */ 246 list_del_init(&td->frame_lh); 247 td->status = USB_TD_OK; 248 if (pkt->info & PKT_DUMMY_PACKET) 249 cq_put(&usb->ep0->dummy_packets_Q, pkt->data); 250 recycle_frame(usb, pkt); 251 usb->actual_frame->total_bytes -= (len + PROTOCOL_OVERHEAD); 252 fhci_err(usb->fhci, "host transaction failed\n"); 253 return -1; 254 } 255 256 return len; 257 } 258 259 static void move_head_to_tail(struct list_head *list) 260 { 261 struct list_head *node = list->next; 262 263 if (!list_empty(list)) { 264 list_move_tail(node, list); 265 } 266 } 267 268 /* 269 * This function goes through the endpoint list and schedules the 270 * transactions within this list 271 */ 272 static int scan_ed_list(struct fhci_usb *usb, 273 struct list_head *list, enum fhci_tf_mode list_type) 274 { 275 static const int frame_part[4] = { 276 [FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME, 277 [FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME * 278 MAX_PERIODIC_FRAME_USAGE) / 100, 279 [FHCI_TF_BULK] = MAX_BYTES_PER_FRAME, 280 [FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME * 281 MAX_PERIODIC_FRAME_USAGE) / 100 282 }; 283 struct ed *ed; 284 struct td *td; 285 int ans = 1; 286 u32 save_transaction_time = usb->sw_transaction_time; 287 288 list_for_each_entry(ed, list, node) { 289 td = ed->td_head; 290 291 if (!td || (td && td->status == USB_TD_INPROGRESS)) 292 continue; 293 294 if (ed->state != FHCI_ED_OPER) { 295 if (ed->state == FHCI_ED_URB_DEL) { 296 td->status = USB_TD_OK; 297 fhci_move_td_from_ed_to_done_list(usb, ed); 298 ed->state = FHCI_ED_SKIP; 299 } 300 continue; 301 } 302 303 /* 304 * if it isn't interrupt pipe or it is not iso pipe and the 305 * interval time passed 306 */ 307 if ((list_type == FHCI_TF_INTR || list_type == FHCI_TF_ISO) && 308 (((usb->actual_frame->frame_num - 309 td->start_frame) & 0x7ff) < td->interval)) 310 continue; 311 312 if (add_packet(usb, ed, td) < 0) 313 continue; 314 315 /* update time stamps in the TD */ 316 td->start_frame = usb->actual_frame->frame_num; 317 usb->sw_transaction_time += save_transaction_time; 318 319 if (usb->actual_frame->total_bytes >= 320 usb->max_bytes_per_frame) { 321 usb->actual_frame->frame_status = 322 FRAME_DATA_END_TRANSMISSION; 323 fhci_push_dummy_bd(usb->ep0); 324 ans = 0; 325 break; 326 } 327 328 if (usb->actual_frame->total_bytes >= frame_part[list_type]) 329 break; 330 } 331 332 /* be fair to each ED(move list head around) */ 333 move_head_to_tail(list); 334 usb->sw_transaction_time = save_transaction_time; 335 336 return ans; 337 } 338 339 static u32 rotate_frames(struct fhci_usb *usb) 340 { 341 struct fhci_hcd *fhci = usb->fhci; 342 343 if (!list_empty(&usb->actual_frame->tds_list)) { 344 if ((((in_be16(&fhci->pram->frame_num) & 0x07ff) - 345 usb->actual_frame->frame_num) & 0x7ff) > 5) 346 fhci_flush_actual_frame(usb); 347 else 348 return -EINVAL; 349 } 350 351 usb->actual_frame->frame_status = FRAME_IS_PREPARED; 352 usb->actual_frame->frame_num = in_be16(&fhci->pram->frame_num) & 0x7ff; 353 usb->actual_frame->total_bytes = 0; 354 355 return 0; 356 } 357 358 /* 359 * This function schedule the USB transaction and will process the 360 * endpoint in the following order: iso, interrupt, control and bulk. 361 */ 362 void fhci_schedule_transactions(struct fhci_usb *usb) 363 { 364 int left = 1; 365 366 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) 367 if (rotate_frames(usb) != 0) 368 return; 369 370 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) 371 return; 372 373 if (usb->actual_frame->total_bytes == 0) { 374 /* 375 * schedule the next available ISO transfer 376 *or next stage of the ISO transfer 377 */ 378 scan_ed_list(usb, &usb->hc_list->iso_list, FHCI_TF_ISO); 379 380 /* 381 * schedule the next available interrupt transfer or 382 * the next stage of the interrupt transfer 383 */ 384 scan_ed_list(usb, &usb->hc_list->intr_list, FHCI_TF_INTR); 385 386 /* 387 * schedule the next available control transfer 388 * or the next stage of the control transfer 389 */ 390 left = scan_ed_list(usb, &usb->hc_list->ctrl_list, 391 FHCI_TF_CTRL); 392 } 393 394 /* 395 * schedule the next available bulk transfer or the next stage of the 396 * bulk transfer 397 */ 398 if (left > 0) 399 scan_ed_list(usb, &usb->hc_list->bulk_list, FHCI_TF_BULK); 400 } 401 402 /* Handles SOF interrupt */ 403 static void sof_interrupt(struct fhci_hcd *fhci) 404 { 405 struct fhci_usb *usb = fhci->usb_lld; 406 407 if ((usb->port_status == FHCI_PORT_DISABLED) && 408 (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_CONNECTION) && 409 !(usb->vroot_hub->port.wPortChange & USB_PORT_STAT_C_CONNECTION)) { 410 if (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_LOW_SPEED) 411 usb->port_status = FHCI_PORT_LOW; 412 else 413 usb->port_status = FHCI_PORT_FULL; 414 /* Disable IDLE */ 415 usb->saved_msk &= ~USB_E_IDLE_MASK; 416 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); 417 } 418 419 gtm_set_exact_timer16(fhci->timer, usb->max_frame_usage, false); 420 421 fhci_host_transmit_actual_frame(usb); 422 usb->actual_frame->frame_status = FRAME_IS_TRANSMITTED; 423 424 fhci_schedule_transactions(usb); 425 } 426 427 /* Handles device disconnected interrupt on port */ 428 void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci) 429 { 430 struct fhci_usb *usb = fhci->usb_lld; 431 432 fhci_dbg(fhci, "-> %s\n", __func__); 433 434 fhci_usb_disable_interrupt(usb); 435 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); 436 usb->port_status = FHCI_PORT_DISABLED; 437 438 fhci_stop_sof_timer(fhci); 439 440 /* Enable IDLE since we want to know if something comes along */ 441 usb->saved_msk |= USB_E_IDLE_MASK; 442 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); 443 444 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_CONNECTION; 445 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_CONNECTION; 446 usb->max_bytes_per_frame = 0; 447 fhci_usb_enable_interrupt(usb); 448 449 fhci_dbg(fhci, "<- %s\n", __func__); 450 } 451 452 /* detect a new device connected on the USB port */ 453 void fhci_device_connected_interrupt(struct fhci_hcd *fhci) 454 { 455 456 struct fhci_usb *usb = fhci->usb_lld; 457 int state; 458 int ret; 459 460 fhci_dbg(fhci, "-> %s\n", __func__); 461 462 fhci_usb_disable_interrupt(usb); 463 state = fhci_ioports_check_bus_state(fhci); 464 465 /* low-speed device was connected to the USB port */ 466 if (state == 1) { 467 ret = qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); 468 if (ret) { 469 fhci_warn(fhci, "Low-Speed device is not supported, " 470 "try use BRGx\n"); 471 goto out; 472 } 473 474 usb->port_status = FHCI_PORT_LOW; 475 setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); 476 usb->vroot_hub->port.wPortStatus |= 477 (USB_PORT_STAT_LOW_SPEED | 478 USB_PORT_STAT_CONNECTION); 479 usb->vroot_hub->port.wPortChange |= 480 USB_PORT_STAT_C_CONNECTION; 481 usb->max_bytes_per_frame = 482 (MAX_BYTES_PER_FRAME >> 3) - 7; 483 fhci_port_enable(usb); 484 } else if (state == 2) { 485 ret = qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); 486 if (ret) { 487 fhci_warn(fhci, "Full-Speed device is not supported, " 488 "try use CLKx\n"); 489 goto out; 490 } 491 492 usb->port_status = FHCI_PORT_FULL; 493 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); 494 usb->vroot_hub->port.wPortStatus &= 495 ~USB_PORT_STAT_LOW_SPEED; 496 usb->vroot_hub->port.wPortStatus |= 497 USB_PORT_STAT_CONNECTION; 498 usb->vroot_hub->port.wPortChange |= 499 USB_PORT_STAT_C_CONNECTION; 500 usb->max_bytes_per_frame = (MAX_BYTES_PER_FRAME - 15); 501 fhci_port_enable(usb); 502 } 503 out: 504 fhci_usb_enable_interrupt(usb); 505 fhci_dbg(fhci, "<- %s\n", __func__); 506 } 507 508 irqreturn_t fhci_frame_limit_timer_irq(int irq, void *_hcd) 509 { 510 struct usb_hcd *hcd = _hcd; 511 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 512 struct fhci_usb *usb = fhci->usb_lld; 513 514 spin_lock(&fhci->lock); 515 516 gtm_set_exact_timer16(fhci->timer, 1000, false); 517 518 if (usb->actual_frame->frame_status == FRAME_IS_TRANSMITTED) { 519 usb->actual_frame->frame_status = FRAME_TIMER_END_TRANSMISSION; 520 fhci_push_dummy_bd(usb->ep0); 521 } 522 523 fhci_schedule_transactions(usb); 524 525 spin_unlock(&fhci->lock); 526 527 return IRQ_HANDLED; 528 } 529 530 /* Cancel transmission on the USB endpoint */ 531 static void abort_transmission(struct fhci_usb *usb) 532 { 533 fhci_dbg(usb->fhci, "-> %s\n", __func__); 534 /* issue stop Tx command */ 535 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0); 536 /* flush Tx FIFOs */ 537 out_8(&usb->fhci->regs->usb_uscom, USB_CMD_FLUSH_FIFO | EP_ZERO); 538 udelay(1000); 539 /* reset Tx BDs */ 540 fhci_flush_bds(usb); 541 /* issue restart Tx command */ 542 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0); 543 fhci_dbg(usb->fhci, "<- %s\n", __func__); 544 } 545 546 irqreturn_t fhci_irq(struct usb_hcd *hcd) 547 { 548 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 549 struct fhci_usb *usb; 550 u16 usb_er = 0; 551 unsigned long flags; 552 553 spin_lock_irqsave(&fhci->lock, flags); 554 555 usb = fhci->usb_lld; 556 557 usb_er |= in_be16(&usb->fhci->regs->usb_usber) & 558 in_be16(&usb->fhci->regs->usb_usbmr); 559 560 /* clear event bits for next time */ 561 out_be16(&usb->fhci->regs->usb_usber, usb_er); 562 563 fhci_dbg_isr(fhci, usb_er); 564 565 if (usb_er & USB_E_RESET_MASK) { 566 if ((usb->port_status == FHCI_PORT_FULL) || 567 (usb->port_status == FHCI_PORT_LOW)) { 568 fhci_device_disconnected_interrupt(fhci); 569 usb_er &= ~USB_E_IDLE_MASK; 570 } else if (usb->port_status == FHCI_PORT_WAITING) { 571 usb->port_status = FHCI_PORT_DISCONNECTING; 572 573 /* Turn on IDLE since we want to disconnect */ 574 usb->saved_msk |= USB_E_IDLE_MASK; 575 out_be16(&usb->fhci->regs->usb_usber, 576 usb->saved_msk); 577 } else if (usb->port_status == FHCI_PORT_DISABLED) { 578 if (fhci_ioports_check_bus_state(fhci) == 1) 579 fhci_device_connected_interrupt(fhci); 580 } 581 usb_er &= ~USB_E_RESET_MASK; 582 } 583 584 if (usb_er & USB_E_MSF_MASK) { 585 abort_transmission(fhci->usb_lld); 586 usb_er &= ~USB_E_MSF_MASK; 587 } 588 589 if (usb_er & (USB_E_SOF_MASK | USB_E_SFT_MASK)) { 590 sof_interrupt(fhci); 591 usb_er &= ~(USB_E_SOF_MASK | USB_E_SFT_MASK); 592 } 593 594 if (usb_er & USB_E_TXB_MASK) { 595 fhci_tx_conf_interrupt(fhci->usb_lld); 596 usb_er &= ~USB_E_TXB_MASK; 597 } 598 599 if (usb_er & USB_E_TXE1_MASK) { 600 fhci_tx_conf_interrupt(fhci->usb_lld); 601 usb_er &= ~USB_E_TXE1_MASK; 602 } 603 604 if (usb_er & USB_E_IDLE_MASK) { 605 if (usb->port_status == FHCI_PORT_DISABLED) { 606 usb_er &= ~USB_E_RESET_MASK; 607 fhci_device_connected_interrupt(fhci); 608 } else if (usb->port_status == 609 FHCI_PORT_DISCONNECTING) { 610 /* XXX usb->port_status = FHCI_PORT_WAITING; */ 611 /* Disable IDLE */ 612 usb->saved_msk &= ~USB_E_IDLE_MASK; 613 out_be16(&usb->fhci->regs->usb_usbmr, 614 usb->saved_msk); 615 } else { 616 fhci_dbg_isr(fhci, -1); 617 } 618 619 usb_er &= ~USB_E_IDLE_MASK; 620 } 621 622 spin_unlock_irqrestore(&fhci->lock, flags); 623 624 return IRQ_HANDLED; 625 } 626 627 628 /* 629 * Process normal completions(error or success) and clean the schedule. 630 * 631 * This is the main path for handing urbs back to drivers. The only other patth 632 * is process_del_list(),which unlinks URBs by scanning EDs,instead of scanning 633 * the (re-reversed) done list as this does. 634 */ 635 static void process_done_list(unsigned long data) 636 { 637 struct urb *urb; 638 struct ed *ed; 639 struct td *td; 640 struct urb_priv *urb_priv; 641 struct fhci_hcd *fhci = (struct fhci_hcd *)data; 642 643 disable_irq(fhci->timer->irq); 644 disable_irq(fhci_to_hcd(fhci)->irq); 645 spin_lock(&fhci->lock); 646 647 td = fhci_remove_td_from_done_list(fhci->hc_list); 648 while (td != NULL) { 649 urb = td->urb; 650 urb_priv = urb->hcpriv; 651 ed = td->ed; 652 653 /* update URB's length and status from TD */ 654 fhci_done_td(urb, td); 655 urb_priv->tds_cnt++; 656 657 /* 658 * if all this urb's TDs are done, call complete() 659 * Interrupt transfers are the onley special case: 660 * they are reissued,until "deleted" by usb_unlink_urb 661 * (real work done in a SOF intr, by process_del_list) 662 */ 663 if (urb_priv->tds_cnt == urb_priv->num_of_tds) { 664 fhci_urb_complete_free(fhci, urb); 665 } else if (urb_priv->state == URB_DEL && 666 ed->state == FHCI_ED_SKIP) { 667 fhci_del_ed_list(fhci, ed); 668 ed->state = FHCI_ED_OPER; 669 } else if (ed->state == FHCI_ED_HALTED) { 670 urb_priv->state = URB_DEL; 671 ed->state = FHCI_ED_URB_DEL; 672 fhci_del_ed_list(fhci, ed); 673 ed->state = FHCI_ED_OPER; 674 } 675 676 td = fhci_remove_td_from_done_list(fhci->hc_list); 677 } 678 679 spin_unlock(&fhci->lock); 680 enable_irq(fhci->timer->irq); 681 enable_irq(fhci_to_hcd(fhci)->irq); 682 } 683 684 DECLARE_TASKLET(fhci_tasklet, process_done_list, 0); 685 686 /* transfer complted callback */ 687 u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci) 688 { 689 if (!fhci->process_done_task->state) 690 tasklet_schedule(fhci->process_done_task); 691 return 0; 692 } 693 694 /* 695 * adds urb to the endpoint descriptor list 696 * arguments: 697 * fhci data structure for the Low level host controller 698 * ep USB Host endpoint data structure 699 * urb USB request block data structure 700 */ 701 void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb) 702 { 703 struct ed *ed = urb->ep->hcpriv; 704 struct urb_priv *urb_priv = urb->hcpriv; 705 u32 data_len = urb->transfer_buffer_length; 706 int urb_state = 0; 707 int toggle = 0; 708 struct td *td; 709 u8 *data; 710 u16 cnt = 0; 711 712 if (ed == NULL) { 713 ed = fhci_get_empty_ed(fhci); 714 ed->dev_addr = usb_pipedevice(urb->pipe); 715 ed->ep_addr = usb_pipeendpoint(urb->pipe); 716 switch (usb_pipetype(urb->pipe)) { 717 case PIPE_CONTROL: 718 ed->mode = FHCI_TF_CTRL; 719 break; 720 case PIPE_BULK: 721 ed->mode = FHCI_TF_BULK; 722 break; 723 case PIPE_INTERRUPT: 724 ed->mode = FHCI_TF_INTR; 725 break; 726 case PIPE_ISOCHRONOUS: 727 ed->mode = FHCI_TF_ISO; 728 break; 729 default: 730 break; 731 } 732 ed->speed = (urb->dev->speed == USB_SPEED_LOW) ? 733 FHCI_LOW_SPEED : FHCI_FULL_SPEED; 734 ed->max_pkt_size = usb_maxpacket(urb->dev, 735 urb->pipe, usb_pipeout(urb->pipe)); 736 urb->ep->hcpriv = ed; 737 fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n", 738 ed->speed, ed->max_pkt_size); 739 } 740 741 /* for ISO transfer calculate start frame index */ 742 if (ed->mode == FHCI_TF_ISO) { 743 /* Ignore the possibility of underruns */ 744 urb->start_frame = ed->td_head ? ed->next_iso : 745 get_frame_num(fhci); 746 ed->next_iso = (urb->start_frame + urb->interval * 747 urb->number_of_packets) & 0x07ff; 748 } 749 750 /* 751 * OHCI handles the DATA toggle itself,we just use the USB 752 * toggle bits 753 */ 754 if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), 755 usb_pipeout(urb->pipe))) 756 toggle = USB_TD_TOGGLE_CARRY; 757 else { 758 toggle = USB_TD_TOGGLE_DATA0; 759 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), 760 usb_pipeout(urb->pipe), 1); 761 } 762 763 urb_priv->tds_cnt = 0; 764 urb_priv->ed = ed; 765 if (data_len > 0) 766 data = urb->transfer_buffer; 767 else 768 data = NULL; 769 770 switch (ed->mode) { 771 case FHCI_TF_BULK: 772 if (urb->transfer_flags & URB_ZERO_PACKET && 773 urb->transfer_buffer_length > 0 && 774 ((urb->transfer_buffer_length % 775 usb_maxpacket(urb->dev, urb->pipe, 776 usb_pipeout(urb->pipe))) == 0)) 777 urb_state = US_BULK0; 778 while (data_len > 4096) { 779 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 780 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 781 FHCI_TA_IN, 782 cnt ? USB_TD_TOGGLE_CARRY : 783 toggle, 784 data, 4096, 0, 0, true); 785 data += 4096; 786 data_len -= 4096; 787 cnt++; 788 } 789 790 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 791 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 792 cnt ? USB_TD_TOGGLE_CARRY : toggle, 793 data, data_len, 0, 0, true); 794 cnt++; 795 796 if (urb->transfer_flags & URB_ZERO_PACKET && 797 cnt < urb_priv->num_of_tds) { 798 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 799 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 800 FHCI_TA_IN, 801 USB_TD_TOGGLE_CARRY, NULL, 0, 0, 0, true); 802 cnt++; 803 } 804 break; 805 case FHCI_TF_INTR: 806 urb->start_frame = get_frame_num(fhci) + 1; 807 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 808 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 809 USB_TD_TOGGLE_DATA0, data, data_len, 810 urb->interval, urb->start_frame, true); 811 break; 812 case FHCI_TF_CTRL: 813 ed->dev_addr = usb_pipedevice(urb->pipe); 814 ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe, 815 usb_pipeout(urb->pipe)); 816 /* setup stage */ 817 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, FHCI_TA_SETUP, 818 USB_TD_TOGGLE_DATA0, urb->setup_packet, 8, 0, 0, true); 819 820 /* data stage */ 821 if (data_len > 0) { 822 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 823 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 824 FHCI_TA_IN, 825 USB_TD_TOGGLE_DATA1, data, data_len, 0, 0, 826 true); 827 } 828 829 /* status stage */ 830 if (data_len > 0) 831 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 832 (usb_pipeout(urb->pipe) ? FHCI_TA_IN : 833 FHCI_TA_OUT), 834 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true); 835 else 836 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 837 FHCI_TA_IN, 838 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true); 839 840 urb_state = US_CTRL_SETUP; 841 break; 842 case FHCI_TF_ISO: 843 for (cnt = 0; cnt < urb->number_of_packets; cnt++) { 844 u16 frame = urb->start_frame; 845 846 /* 847 * FIXME scheduling should handle frame counter 848 * roll-around ... exotic case (and OHCI has 849 * a 2^16 iso range, vs other HCs max of 2^10) 850 */ 851 frame += cnt * urb->interval; 852 frame &= 0x07ff; 853 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 854 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 855 FHCI_TA_IN, 856 USB_TD_TOGGLE_DATA0, 857 data + urb->iso_frame_desc[cnt].offset, 858 urb->iso_frame_desc[cnt].length, 859 urb->interval, frame, true); 860 } 861 break; 862 default: 863 break; 864 } 865 866 /* 867 * set the state of URB 868 * control pipe:3 states -- setup,data,status 869 * interrupt and bulk pipe:1 state -- data 870 */ 871 urb->pipe &= ~0x1f; 872 urb->pipe |= urb_state & 0x1f; 873 874 urb_priv->state = URB_INPROGRESS; 875 876 if (!ed->td_head) { 877 ed->state = FHCI_ED_OPER; 878 switch (ed->mode) { 879 case FHCI_TF_CTRL: 880 list_add(&ed->node, &fhci->hc_list->ctrl_list); 881 break; 882 case FHCI_TF_BULK: 883 list_add(&ed->node, &fhci->hc_list->bulk_list); 884 break; 885 case FHCI_TF_INTR: 886 list_add(&ed->node, &fhci->hc_list->intr_list); 887 break; 888 case FHCI_TF_ISO: 889 list_add(&ed->node, &fhci->hc_list->iso_list); 890 break; 891 default: 892 break; 893 } 894 } 895 896 fhci_add_tds_to_ed(ed, urb_priv->tds, urb_priv->num_of_tds); 897 fhci->active_urbs++; 898 } 899