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 <linux/usb/hcd.h> 28 #include <asm/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_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 fhci_device_connected_interrupt(fhci); 581 } 582 usb_er &= ~USB_E_RESET_MASK; 583 } 584 585 if (usb_er & USB_E_MSF_MASK) { 586 abort_transmission(fhci->usb_lld); 587 usb_er &= ~USB_E_MSF_MASK; 588 } 589 590 if (usb_er & (USB_E_SOF_MASK | USB_E_SFT_MASK)) { 591 sof_interrupt(fhci); 592 usb_er &= ~(USB_E_SOF_MASK | USB_E_SFT_MASK); 593 } 594 595 if (usb_er & USB_E_TXB_MASK) { 596 fhci_tx_conf_interrupt(fhci->usb_lld); 597 usb_er &= ~USB_E_TXB_MASK; 598 } 599 600 if (usb_er & USB_E_TXE1_MASK) { 601 fhci_tx_conf_interrupt(fhci->usb_lld); 602 usb_er &= ~USB_E_TXE1_MASK; 603 } 604 605 if (usb_er & USB_E_IDLE_MASK) { 606 if (usb->port_status == FHCI_PORT_DISABLED) { 607 usb_er &= ~USB_E_RESET_MASK; 608 fhci_device_connected_interrupt(fhci); 609 } else if (usb->port_status == 610 FHCI_PORT_DISCONNECTING) { 611 /* XXX usb->port_status = FHCI_PORT_WAITING; */ 612 /* Disable IDLE */ 613 usb->saved_msk &= ~USB_E_IDLE_MASK; 614 out_be16(&usb->fhci->regs->usb_mask, 615 usb->saved_msk); 616 } else { 617 fhci_dbg_isr(fhci, -1); 618 } 619 620 usb_er &= ~USB_E_IDLE_MASK; 621 } 622 623 spin_unlock_irqrestore(&fhci->lock, flags); 624 625 return IRQ_HANDLED; 626 } 627 628 629 /* 630 * Process normal completions(error or success) and clean the schedule. 631 * 632 * This is the main path for handing urbs back to drivers. The only other patth 633 * is process_del_list(),which unlinks URBs by scanning EDs,instead of scanning 634 * the (re-reversed) done list as this does. 635 */ 636 static void process_done_list(unsigned long data) 637 { 638 struct urb *urb; 639 struct ed *ed; 640 struct td *td; 641 struct urb_priv *urb_priv; 642 struct fhci_hcd *fhci = (struct fhci_hcd *)data; 643 644 disable_irq(fhci->timer->irq); 645 disable_irq(fhci_to_hcd(fhci)->irq); 646 spin_lock(&fhci->lock); 647 648 td = fhci_remove_td_from_done_list(fhci->hc_list); 649 while (td != NULL) { 650 urb = td->urb; 651 urb_priv = urb->hcpriv; 652 ed = td->ed; 653 654 /* update URB's length and status from TD */ 655 fhci_done_td(urb, td); 656 urb_priv->tds_cnt++; 657 658 /* 659 * if all this urb's TDs are done, call complete() 660 * Interrupt transfers are the onley special case: 661 * they are reissued,until "deleted" by usb_unlink_urb 662 * (real work done in a SOF intr, by process_del_list) 663 */ 664 if (urb_priv->tds_cnt == urb_priv->num_of_tds) { 665 fhci_urb_complete_free(fhci, urb); 666 } else if (urb_priv->state == URB_DEL && 667 ed->state == FHCI_ED_SKIP) { 668 fhci_del_ed_list(fhci, ed); 669 ed->state = FHCI_ED_OPER; 670 } else if (ed->state == FHCI_ED_HALTED) { 671 urb_priv->state = URB_DEL; 672 ed->state = FHCI_ED_URB_DEL; 673 fhci_del_ed_list(fhci, ed); 674 ed->state = FHCI_ED_OPER; 675 } 676 677 td = fhci_remove_td_from_done_list(fhci->hc_list); 678 } 679 680 spin_unlock(&fhci->lock); 681 enable_irq(fhci->timer->irq); 682 enable_irq(fhci_to_hcd(fhci)->irq); 683 } 684 685 DECLARE_TASKLET(fhci_tasklet, process_done_list, 0); 686 687 /* transfer complted callback */ 688 u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci) 689 { 690 if (!fhci->process_done_task->state) 691 tasklet_schedule(fhci->process_done_task); 692 return 0; 693 } 694 695 /* 696 * adds urb to the endpoint descriptor list 697 * arguments: 698 * fhci data structure for the Low level host controller 699 * ep USB Host endpoint data structure 700 * urb USB request block data structure 701 */ 702 void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb) 703 { 704 struct ed *ed = urb->ep->hcpriv; 705 struct urb_priv *urb_priv = urb->hcpriv; 706 u32 data_len = urb->transfer_buffer_length; 707 int urb_state = 0; 708 int toggle = 0; 709 struct td *td; 710 u8 *data; 711 u16 cnt = 0; 712 713 if (ed == NULL) { 714 ed = fhci_get_empty_ed(fhci); 715 ed->dev_addr = usb_pipedevice(urb->pipe); 716 ed->ep_addr = usb_pipeendpoint(urb->pipe); 717 switch (usb_pipetype(urb->pipe)) { 718 case PIPE_CONTROL: 719 ed->mode = FHCI_TF_CTRL; 720 break; 721 case PIPE_BULK: 722 ed->mode = FHCI_TF_BULK; 723 break; 724 case PIPE_INTERRUPT: 725 ed->mode = FHCI_TF_INTR; 726 break; 727 case PIPE_ISOCHRONOUS: 728 ed->mode = FHCI_TF_ISO; 729 break; 730 default: 731 break; 732 } 733 ed->speed = (urb->dev->speed == USB_SPEED_LOW) ? 734 FHCI_LOW_SPEED : FHCI_FULL_SPEED; 735 ed->max_pkt_size = usb_maxpacket(urb->dev, 736 urb->pipe, usb_pipeout(urb->pipe)); 737 urb->ep->hcpriv = ed; 738 fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n", 739 ed->speed, ed->max_pkt_size); 740 } 741 742 /* for ISO transfer calculate start frame index */ 743 if (ed->mode == FHCI_TF_ISO && urb->transfer_flags & URB_ISO_ASAP) 744 urb->start_frame = ed->td_head ? ed->last_iso + 1 : 745 get_frame_num(fhci); 746 747 /* 748 * OHCI handles the DATA toggle itself,we just use the USB 749 * toggle bits 750 */ 751 if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), 752 usb_pipeout(urb->pipe))) 753 toggle = USB_TD_TOGGLE_CARRY; 754 else { 755 toggle = USB_TD_TOGGLE_DATA0; 756 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), 757 usb_pipeout(urb->pipe), 1); 758 } 759 760 urb_priv->tds_cnt = 0; 761 urb_priv->ed = ed; 762 if (data_len > 0) 763 data = urb->transfer_buffer; 764 else 765 data = NULL; 766 767 switch (ed->mode) { 768 case FHCI_TF_BULK: 769 if (urb->transfer_flags & URB_ZERO_PACKET && 770 urb->transfer_buffer_length > 0 && 771 ((urb->transfer_buffer_length % 772 usb_maxpacket(urb->dev, urb->pipe, 773 usb_pipeout(urb->pipe))) == 0)) 774 urb_state = US_BULK0; 775 while (data_len > 4096) { 776 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 777 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 778 FHCI_TA_IN, 779 cnt ? USB_TD_TOGGLE_CARRY : 780 toggle, 781 data, 4096, 0, 0, true); 782 data += 4096; 783 data_len -= 4096; 784 cnt++; 785 } 786 787 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 788 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 789 cnt ? USB_TD_TOGGLE_CARRY : toggle, 790 data, data_len, 0, 0, true); 791 cnt++; 792 793 if (urb->transfer_flags & URB_ZERO_PACKET && 794 cnt < urb_priv->num_of_tds) { 795 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 796 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 797 FHCI_TA_IN, 798 USB_TD_TOGGLE_CARRY, NULL, 0, 0, 0, true); 799 cnt++; 800 } 801 break; 802 case FHCI_TF_INTR: 803 urb->start_frame = get_frame_num(fhci) + 1; 804 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 805 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, 806 USB_TD_TOGGLE_DATA0, data, data_len, 807 urb->interval, urb->start_frame, true); 808 break; 809 case FHCI_TF_CTRL: 810 ed->dev_addr = usb_pipedevice(urb->pipe); 811 ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe, 812 usb_pipeout(urb->pipe)); 813 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, FHCI_TA_SETUP, 814 USB_TD_TOGGLE_DATA0, urb->setup_packet, 8, 0, 0, true); 815 816 if (data_len > 0) { 817 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 818 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 819 FHCI_TA_IN, 820 USB_TD_TOGGLE_DATA1, data, data_len, 0, 0, 821 true); 822 } 823 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, 824 usb_pipeout(urb->pipe) ? FHCI_TA_IN : FHCI_TA_OUT, 825 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true); 826 urb_state = US_CTRL_SETUP; 827 break; 828 case FHCI_TF_ISO: 829 for (cnt = 0; cnt < urb->number_of_packets; cnt++) { 830 u16 frame = urb->start_frame; 831 832 /* 833 * FIXME scheduling should handle frame counter 834 * roll-around ... exotic case (and OHCI has 835 * a 2^16 iso range, vs other HCs max of 2^10) 836 */ 837 frame += cnt * urb->interval; 838 frame &= 0x07ff; 839 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt, 840 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : 841 FHCI_TA_IN, 842 USB_TD_TOGGLE_DATA0, 843 data + urb->iso_frame_desc[cnt].offset, 844 urb->iso_frame_desc[cnt].length, 845 urb->interval, frame, true); 846 } 847 break; 848 default: 849 break; 850 } 851 852 /* 853 * set the state of URB 854 * control pipe:3 states -- setup,data,status 855 * interrupt and bulk pipe:1 state -- data 856 */ 857 urb->pipe &= ~0x1f; 858 urb->pipe |= urb_state & 0x1f; 859 860 urb_priv->state = URB_INPROGRESS; 861 862 if (!ed->td_head) { 863 ed->state = FHCI_ED_OPER; 864 switch (ed->mode) { 865 case FHCI_TF_CTRL: 866 list_add(&ed->node, &fhci->hc_list->ctrl_list); 867 break; 868 case FHCI_TF_BULK: 869 list_add(&ed->node, &fhci->hc_list->bulk_list); 870 break; 871 case FHCI_TF_INTR: 872 list_add(&ed->node, &fhci->hc_list->intr_list); 873 break; 874 case FHCI_TF_ISO: 875 list_add(&ed->node, &fhci->hc_list->iso_list); 876 break; 877 default: 878 break; 879 } 880 } 881 882 fhci_add_tds_to_ed(ed, urb_priv->tds, urb_priv->num_of_tds); 883 fhci->active_urbs++; 884 } 885