1 /* 2 * Freescale QUICC Engine USB Host Controller Driver 3 * 4 * Copyright (c) Freescale Semicondutor, Inc. 2006. 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 <asm/qe.h> 28 #include <asm/fsl_gtm.h> 29 #include "../core/hcd.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 allready 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_mod); 136 clrbits8(&usb->fhci->regs->usb_mod, 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_event, 0xffff); 151 /* enable the USB controller */ 152 out_8(&usb->fhci->regs->usb_mod, 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_del(node); 265 list_add_tail(node, list); 266 } 267 } 268 269 /* 270 * This function goes through the endpoint list and schedules the 271 * transactions within this list 272 */ 273 static int scan_ed_list(struct fhci_usb *usb, 274 struct list_head *list, enum fhci_tf_mode list_type) 275 { 276 static const int frame_part[4] = { 277 [FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME, 278 [FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME * 279 MAX_PERIODIC_FRAME_USAGE) / 100, 280 [FHCI_TF_BULK] = MAX_BYTES_PER_FRAME, 281 [FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME * 282 MAX_PERIODIC_FRAME_USAGE) / 100 283 }; 284 struct ed *ed; 285 struct td *td; 286 int ans = 1; 287 u32 save_transaction_time = usb->sw_transaction_time; 288 289 list_for_each_entry(ed, list, node) { 290 td = ed->td_head; 291 292 if (!td || (td && td->status == USB_TD_INPROGRESS)) 293 continue; 294 295 if (ed->state != FHCI_ED_OPER) { 296 if (ed->state == FHCI_ED_URB_DEL) { 297 td->status = USB_TD_OK; 298 fhci_move_td_from_ed_to_done_list(usb, ed); 299 ed->state = FHCI_ED_SKIP; 300 } 301 continue; 302 } 303 304 /* 305 * if it isn't interrupt pipe or it is not iso pipe and the 306 * interval time passed 307 */ 308 if ((list_type == FHCI_TF_INTR || list_type == FHCI_TF_ISO) && 309 (((usb->actual_frame->frame_num - 310 td->start_frame) & 0x7ff) < td->interval)) 311 continue; 312 313 if (add_packet(usb, ed, td) < 0) 314 continue; 315 316 /* update time stamps in the TD */ 317 td->start_frame = usb->actual_frame->frame_num; 318 usb->sw_transaction_time += save_transaction_time; 319 320 if (usb->actual_frame->total_bytes >= 321 usb->max_bytes_per_frame) { 322 usb->actual_frame->frame_status = 323 FRAME_DATA_END_TRANSMISSION; 324 fhci_push_dummy_bd(usb->ep0); 325 ans = 0; 326 break; 327 } 328 329 if (usb->actual_frame->total_bytes >= frame_part[list_type]) 330 break; 331 } 332 333 /* be fair to each ED(move list head around) */ 334 move_head_to_tail(list); 335 usb->sw_transaction_time = save_transaction_time; 336 337 return ans; 338 } 339 340 static u32 rotate_frames(struct fhci_usb *usb) 341 { 342 struct fhci_hcd *fhci = usb->fhci; 343 344 if (!list_empty(&usb->actual_frame->tds_list)) { 345 if ((((in_be16(&fhci->pram->frame_num) & 0x07ff) - 346 usb->actual_frame->frame_num) & 0x7ff) > 5) 347 fhci_flush_actual_frame(usb); 348 else 349 return -EINVAL; 350 } 351 352 usb->actual_frame->frame_status = FRAME_IS_PREPARED; 353 usb->actual_frame->frame_num = in_be16(&fhci->pram->frame_num) & 0x7ff; 354 usb->actual_frame->total_bytes = 0; 355 356 return 0; 357 } 358 359 /* 360 * This function schedule the USB transaction and will process the 361 * endpoint in the following order: iso, interrupt, control and bulk. 362 */ 363 void fhci_schedule_transactions(struct fhci_usb *usb) 364 { 365 int left = 1; 366 367 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) 368 if (rotate_frames(usb) != 0) 369 return; 370 371 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION) 372 return; 373 374 if (usb->actual_frame->total_bytes == 0) { 375 /* 376 * schedule the next available ISO transfer 377 *or next stage of the ISO transfer 378 */ 379 scan_ed_list(usb, &usb->hc_list->iso_list, FHCI_TF_ISO); 380 381 /* 382 * schedule the next available interrupt transfer or 383 * the next stage of the interrupt transfer 384 */ 385 scan_ed_list(usb, &usb->hc_list->intr_list, FHCI_TF_INTR); 386 387 /* 388 * schedule the next available control transfer 389 * or the next stage of the control transfer 390 */ 391 left = scan_ed_list(usb, &usb->hc_list->ctrl_list, 392 FHCI_TF_CTRL); 393 } 394 395 /* 396 * schedule the next available bulk transfer or the next stage of the 397 * bulk transfer 398 */ 399 if (left > 0) 400 scan_ed_list(usb, &usb->hc_list->bulk_list, FHCI_TF_BULK); 401 } 402 403 /* Handles SOF interrupt */ 404 static void sof_interrupt(struct fhci_hcd *fhci) 405 { 406 struct fhci_usb *usb = fhci->usb_lld; 407 408 if ((usb->port_status == FHCI_PORT_DISABLED) && 409 (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_CONNECTION) && 410 !(usb->vroot_hub->port.wPortChange & USB_PORT_STAT_C_CONNECTION)) { 411 if (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_LOW_SPEED) 412 usb->port_status = FHCI_PORT_LOW; 413 else 414 usb->port_status = FHCI_PORT_FULL; 415 /* Disable IDLE */ 416 usb->saved_msk &= ~USB_E_IDLE_MASK; 417 out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); 418 } 419 420 gtm_set_exact_timer16(fhci->timer, usb->max_frame_usage, false); 421 422 fhci_host_transmit_actual_frame(usb); 423 usb->actual_frame->frame_status = FRAME_IS_TRANSMITTED; 424 425 fhci_schedule_transactions(usb); 426 } 427 428 /* Handles device disconnected interrupt on port */ 429 void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci) 430 { 431 struct fhci_usb *usb = fhci->usb_lld; 432 433 fhci_dbg(fhci, "-> %s\n", __func__); 434 435 fhci_usb_disable_interrupt(usb); 436 clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_LSS); 437 usb->port_status = FHCI_PORT_DISABLED; 438 439 fhci_stop_sof_timer(fhci); 440 441 /* Enable IDLE since we want to know if something comes along */ 442 usb->saved_msk |= USB_E_IDLE_MASK; 443 out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); 444 445 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_CONNECTION; 446 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_CONNECTION; 447 usb->max_bytes_per_frame = 0; 448 fhci_usb_enable_interrupt(usb); 449 450 fhci_dbg(fhci, "<- %s\n", __func__); 451 } 452 453 /* detect a new device connected on the USB port */ 454 void fhci_device_connected_interrupt(struct fhci_hcd *fhci) 455 { 456 457 struct fhci_usb *usb = fhci->usb_lld; 458 int state; 459 int ret; 460 461 fhci_dbg(fhci, "-> %s\n", __func__); 462 463 fhci_usb_disable_interrupt(usb); 464 state = fhci_ioports_check_bus_state(fhci); 465 466 /* low-speed device was connected to the USB port */ 467 if (state == 1) { 468 ret = qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); 469 if (ret) { 470 fhci_warn(fhci, "Low-Speed device is not supported, " 471 "try use BRGx\n"); 472 goto out; 473 } 474 475 usb->port_status = FHCI_PORT_LOW; 476 setbits8(&usb->fhci->regs->usb_mod, USB_MODE_LSS); 477 usb->vroot_hub->port.wPortStatus |= 478 (USB_PORT_STAT_LOW_SPEED | 479 USB_PORT_STAT_CONNECTION); 480 usb->vroot_hub->port.wPortChange |= 481 USB_PORT_STAT_C_CONNECTION; 482 usb->max_bytes_per_frame = 483 (MAX_BYTES_PER_FRAME >> 3) - 7; 484 fhci_port_enable(usb); 485 } else if (state == 2) { 486 ret = qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); 487 if (ret) { 488 fhci_warn(fhci, "Full-Speed device is not supported, " 489 "try use CLKx\n"); 490 goto out; 491 } 492 493 usb->port_status = FHCI_PORT_FULL; 494 clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_LSS); 495 usb->vroot_hub->port.wPortStatus &= 496 ~USB_PORT_STAT_LOW_SPEED; 497 usb->vroot_hub->port.wPortStatus |= 498 USB_PORT_STAT_CONNECTION; 499 usb->vroot_hub->port.wPortChange |= 500 USB_PORT_STAT_C_CONNECTION; 501 usb->max_bytes_per_frame = (MAX_BYTES_PER_FRAME - 15); 502 fhci_port_enable(usb); 503 } 504 out: 505 fhci_usb_enable_interrupt(usb); 506 fhci_dbg(fhci, "<- %s\n", __func__); 507 } 508 509 irqreturn_t fhci_frame_limit_timer_irq(int irq, void *_hcd) 510 { 511 struct usb_hcd *hcd = _hcd; 512 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 513 struct fhci_usb *usb = fhci->usb_lld; 514 515 spin_lock(&fhci->lock); 516 517 gtm_set_exact_timer16(fhci->timer, 1000, false); 518 519 if (usb->actual_frame->frame_status == FRAME_IS_TRANSMITTED) { 520 usb->actual_frame->frame_status = FRAME_TIMER_END_TRANSMISSION; 521 fhci_push_dummy_bd(usb->ep0); 522 } 523 524 fhci_schedule_transactions(usb); 525 526 spin_unlock(&fhci->lock); 527 528 return IRQ_HANDLED; 529 } 530 531 /* Cancel transmission on the USB endpoint */ 532 static void abort_transmission(struct fhci_usb *usb) 533 { 534 fhci_dbg(usb->fhci, "-> %s\n", __func__); 535 /* issue stop Tx command */ 536 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0); 537 /* flush Tx FIFOs */ 538 out_8(&usb->fhci->regs->usb_comm, USB_CMD_FLUSH_FIFO | EP_ZERO); 539 udelay(1000); 540 /* reset Tx BDs */ 541 fhci_flush_bds(usb); 542 /* issue restart Tx command */ 543 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0); 544 fhci_dbg(usb->fhci, "<- %s\n", __func__); 545 } 546 547 irqreturn_t fhci_irq(struct usb_hcd *hcd) 548 { 549 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 550 struct fhci_usb *usb; 551 u16 usb_er = 0; 552 unsigned long flags; 553 554 spin_lock_irqsave(&fhci->lock, flags); 555 556 usb = fhci->usb_lld; 557 558 usb_er |= in_be16(&usb->fhci->regs->usb_event) & 559 in_be16(&usb->fhci->regs->usb_mask); 560 561 /* clear event bits for next time */ 562 out_be16(&usb->fhci->regs->usb_event, usb_er); 563 564 fhci_dbg_isr(fhci, usb_er); 565 566 if (usb_er & USB_E_RESET_MASK) { 567 if ((usb->port_status == FHCI_PORT_FULL) || 568 (usb->port_status == FHCI_PORT_LOW)) { 569 fhci_device_disconnected_interrupt(fhci); 570 usb_er &= ~USB_E_IDLE_MASK; 571 } else if (usb->port_status == FHCI_PORT_WAITING) { 572 usb->port_status = FHCI_PORT_DISCONNECTING; 573 574 /* Turn on IDLE since we want to disconnect */ 575 usb->saved_msk |= USB_E_IDLE_MASK; 576 out_be16(&usb->fhci->regs->usb_event, 577 usb->saved_msk); 578 } else if (usb->port_status == FHCI_PORT_DISABLED) { 579 if (fhci_ioports_check_bus_state(fhci) == 1 && 580 usb->port_status != FHCI_PORT_LOW && 581 usb->port_status != FHCI_PORT_FULL) 582 fhci_device_connected_interrupt(fhci); 583 } 584 usb_er &= ~USB_E_RESET_MASK; 585 } 586 587 if (usb_er & USB_E_MSF_MASK) { 588 abort_transmission(fhci->usb_lld); 589 usb_er &= ~USB_E_MSF_MASK; 590 } 591 592 if (usb_er & (USB_E_SOF_MASK | USB_E_SFT_MASK)) { 593 sof_interrupt(fhci); 594 usb_er &= ~(USB_E_SOF_MASK | USB_E_SFT_MASK); 595 } 596 597 if (usb_er & USB_E_TXB_MASK) { 598 fhci_tx_conf_interrupt(fhci->usb_lld); 599 usb_er &= ~USB_E_TXB_MASK; 600 } 601 602 if (usb_er & USB_E_TXE1_MASK) { 603 fhci_tx_conf_interrupt(fhci->usb_lld); 604 usb_er &= ~USB_E_TXE1_MASK; 605 } 606 607 if (usb_er & USB_E_IDLE_MASK) { 608 if (usb->port_status == FHCI_PORT_DISABLED && 609 usb->port_status != FHCI_PORT_LOW && 610 usb->port_status != FHCI_PORT_FULL) { 611 usb_er &= ~USB_E_RESET_MASK; 612 fhci_device_connected_interrupt(fhci); 613 } else if (usb->port_status == 614 FHCI_PORT_DISCONNECTING) { 615 /* XXX usb->port_status = FHCI_PORT_WAITING; */ 616 /* Disable IDLE */ 617 usb->saved_msk &= ~USB_E_IDLE_MASK; 618 out_be16(&usb->fhci->regs->usb_mask, 619 usb->saved_msk); 620 } else { 621 fhci_dbg_isr(fhci, -1); 622 } 623 624 usb_er &= ~USB_E_IDLE_MASK; 625 } 626 627 spin_unlock_irqrestore(&fhci->lock, flags); 628 629 return IRQ_HANDLED; 630 } 631 632 633 /* 634 * Process normal completions(error or sucess) and clean the schedule. 635 * 636 * This is the main path for handing urbs back to drivers. The only other patth 637 * is process_del_list(),which unlinks URBs by scanning EDs,instead of scanning 638 * the (re-reversed) done list as this does. 639 */ 640 static void process_done_list(unsigned long data) 641 { 642 struct urb *urb; 643 struct ed *ed; 644 struct td *td; 645 struct urb_priv *urb_priv; 646 struct fhci_hcd *fhci = (struct fhci_hcd *)data; 647 648 disable_irq(fhci->timer->irq); 649 disable_irq(fhci_to_hcd(fhci)->irq); 650 spin_lock(&fhci->lock); 651 652 td = fhci_remove_td_from_done_list(fhci->hc_list); 653 while (td != NULL) { 654 urb = td->urb; 655 urb_priv = urb->hcpriv; 656 ed = td->ed; 657 658 /* update URB's length and status from TD */ 659 fhci_done_td(urb, td); 660 urb_priv->tds_cnt++; 661 662 /* 663 * if all this urb's TDs are done, call complete() 664 * Interrupt transfers are the onley special case: 665 * they are reissued,until "deleted" by usb_unlink_urb 666 * (real work done in a SOF intr, by process_del_list) 667 */ 668 if (urb_priv->tds_cnt == urb_priv->num_of_tds) { 669 fhci_urb_complete_free(fhci, urb); 670 } else if (urb_priv->state == URB_DEL && 671 ed->state == FHCI_ED_SKIP) { 672 fhci_del_ed_list(fhci, ed); 673 ed->state = FHCI_ED_OPER; 674 } else if (ed->state == FHCI_ED_HALTED) { 675 urb_priv->state = URB_DEL; 676 ed->state = FHCI_ED_URB_DEL; 677 fhci_del_ed_list(fhci, ed); 678 ed->state = FHCI_ED_OPER; 679 } 680 681 td = fhci_remove_td_from_done_list(fhci->hc_list); 682 } 683 684 spin_unlock(&fhci->lock); 685 enable_irq(fhci->timer->irq); 686 enable_irq(fhci_to_hcd(fhci)->irq); 687 } 688 689 DECLARE_TASKLET(fhci_tasklet, process_done_list, 0); 690 691 /* transfer complted callback */ 692 u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci) 693 { 694 if (!fhci->process_done_task->state) 695 tasklet_schedule(fhci->process_done_task); 696 return 0; 697 } 698 699 /* 700 * adds urb to the endpoint descriptor list 701 * arguments: 702 * fhci data structure for the Low level host controller 703 * ep USB Host endpoint data structure 704 * urb USB request block data structure 705 */ 706 void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb) 707 { 708 struct ed *ed = urb->ep->hcpriv; 709 struct urb_priv *urb_priv = urb->hcpriv; 710 u32 data_len = urb->transfer_buffer_length; 711 int urb_state = 0; 712 int toggle = 0; 713 struct td *td; 714 u8 *data; 715 u16 cnt = 0; 716 717 if (ed == NULL) { 718 ed = fhci_get_empty_ed(fhci); 719 ed->dev_addr = usb_pipedevice(urb->pipe); 720 ed->ep_addr = usb_pipeendpoint(urb->pipe); 721 switch (usb_pipetype(urb->pipe)) { 722 case PIPE_CONTROL: 723 ed->mode = FHCI_TF_CTRL; 724 break; 725 case PIPE_BULK: 726 ed->mode = FHCI_TF_BULK; 727 break; 728 case PIPE_INTERRUPT: 729 ed->mode = FHCI_TF_INTR; 730 break; 731 case PIPE_ISOCHRONOUS: 732 ed->mode = FHCI_TF_ISO; 733 break; 734 default: 735 break; 736 } 737 ed->speed = (urb->dev->speed == USB_SPEED_LOW) ? 738 FHCI_LOW_SPEED : FHCI_FULL_SPEED; 739 ed->max_pkt_size = usb_maxpacket(urb->dev, 740 urb->pipe, usb_pipeout(urb->pipe)); 741 urb->ep->hcpriv = ed; 742 fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n", 743 ed->speed, ed->max_pkt_size); 744 } 745 746 /* for ISO transfer calculate start frame index */ 747 if (ed->mode == FHCI_TF_ISO && urb->transfer_flags & URB_ISO_ASAP) 748 urb->start_frame = ed->td_head ? ed->last_iso + 1 : 749 get_frame_num(fhci); 750 751 /* 752 * OHCI handles the DATA toggle itself,we just use the USB 753 * toggle bits 754 */ 755 if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), 756 usb_pipeout(urb->pipe))) 757 toggle = USB_TD_TOGGLE_CARRY; 758 else { 759 toggle = USB_TD_TOGGLE_DATA0; 760 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), 761 usb_pipeout(urb->pipe), 1); 762 } 763 764 urb_priv->tds_cnt = 0; 765 urb_priv->ed = ed; 766 if (data_len > 0) 767 data = urb->transfer_buffer; 768 else 769 data = NULL; 770 771 switch (ed->mode) { 772 case FHCI_TF_BULK: 773 if (urb->transfer_flags & URB_ZERO_PACKET && 774 urb->transfer_buffer_length > 0 && 775 ((urb->transfer_buffer_length % 776 usb_maxpacket(urb->dev, urb->pipe, 777 usb_pipeout(urb->pipe))) == 0)) 778 urb_state = US_BULK0; 779 while (data_len > 4096) { 780 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 781 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 782 FHCI_TA_IN, 783 cnt ? USB_TD_TOGGLE_CARRY : 784 toggle, 785 data, 4096, 0, 0, true); 786 data += 4096; 787 data_len -= 4096; 788 cnt++; 789 } 790 791 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 792 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 793 cnt ? USB_TD_TOGGLE_CARRY : toggle, 794 data, data_len, 0, 0, true); 795 cnt++; 796 797 if (urb->transfer_flags & URB_ZERO_PACKET && 798 cnt < urb_priv->num_of_tds) { 799 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 800 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 801 FHCI_TA_IN, 802 USB_TD_TOGGLE_CARRY, NULL, 0, 0, 0, true); 803 cnt++; 804 } 805 break; 806 case FHCI_TF_INTR: 807 urb->start_frame = get_frame_num(fhci) + 1; 808 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 809 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 810 USB_TD_TOGGLE_DATA0, data, data_len, 811 urb->interval, urb->start_frame, true); 812 break; 813 case FHCI_TF_CTRL: 814 ed->dev_addr = usb_pipedevice(urb->pipe); 815 ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe, 816 usb_pipeout(urb->pipe)); 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 if (data_len > 0) { 821 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 822 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 823 FHCI_TA_IN, 824 USB_TD_TOGGLE_DATA1, data, data_len, 0, 0, 825 true); 826 } 827 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 828 usb_pipeout(urb->pipe) ? FHCI_TA_IN : FHCI_TA_OUT, 829 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true); 830 urb_state = US_CTRL_SETUP; 831 break; 832 case FHCI_TF_ISO: 833 for (cnt = 0; cnt < urb->number_of_packets; cnt++) { 834 u16 frame = urb->start_frame; 835 836 /* 837 * FIXME scheduling should handle frame counter 838 * roll-around ... exotic case (and OHCI has 839 * a 2^16 iso range, vs other HCs max of 2^10) 840 */ 841 frame += cnt * urb->interval; 842 frame &= 0x07ff; 843 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 844 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 845 FHCI_TA_IN, 846 USB_TD_TOGGLE_DATA0, 847 data + urb->iso_frame_desc[cnt].offset, 848 urb->iso_frame_desc[cnt].length, 849 urb->interval, frame, true); 850 } 851 break; 852 default: 853 break; 854 } 855 856 /* 857 * set the state of URB 858 * control pipe:3 states -- setup,data,status 859 * interrupt and bulk pipe:1 state -- data 860 */ 861 urb->pipe &= ~0x1f; 862 urb->pipe |= urb_state & 0x1f; 863 864 urb_priv->state = URB_INPROGRESS; 865 866 if (!ed->td_head) { 867 ed->state = FHCI_ED_OPER; 868 switch (ed->mode) { 869 case FHCI_TF_CTRL: 870 list_add(&ed->node, &fhci->hc_list->ctrl_list); 871 break; 872 case FHCI_TF_BULK: 873 list_add(&ed->node, &fhci->hc_list->bulk_list); 874 break; 875 case FHCI_TF_INTR: 876 list_add(&ed->node, &fhci->hc_list->intr_list); 877 break; 878 case FHCI_TF_ISO: 879 list_add(&ed->node, &fhci->hc_list->iso_list); 880 break; 881 default: 882 break; 883 } 884 } 885 886 fhci_add_tds_to_ed(ed, urb_priv->tds, urb_priv->num_of_tds); 887 fhci->active_urbs++; 888 } 889