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Linux 4.16.11
[linux/fpc-iii.git] / drivers / usb / host / fhci-sched.c
blob3d12cdd5f999596be2bcc1fdb5b433d8101ebdd5
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Freescale QUICC Engine USB Host Controller Driver
4 *
5 * Copyright (c) Freescale Semicondutor, Inc. 2006, 2011.
6 * Shlomi Gridish <gridish@freescale.com>
7 * Jerry Huang <Chang-Ming.Huang@freescale.com>
8 * Copyright (c) Logic Product Development, Inc. 2007
9 * Peter Barada <peterb@logicpd.com>
10 * Copyright (c) MontaVista Software, Inc. 2008.
11 * Anton Vorontsov <avorontsov@ru.mvista.com>
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/spinlock.h>
17 #include <linux/delay.h>
18 #include <linux/errno.h>
19 #include <linux/list.h>
20 #include <linux/interrupt.h>
21 #include <linux/io.h>
22 #include <linux/usb.h>
23 #include <linux/usb/hcd.h>
24 #include <soc/fsl/qe/qe.h>
25 #include <asm/fsl_gtm.h>
26 #include "fhci.h"
27
28 static void recycle_frame(struct fhci_usb *usb, struct packet *pkt)
29 {
30 pkt->data = NULL;
31 pkt->len = 0;
32 pkt->status = USB_TD_OK;
33 pkt->info = 0;
34 pkt->priv_data = NULL;
35
36 cq_put(&usb->ep0->empty_frame_Q, pkt);
37 }
38
39 /* confirm submitted packet */
40 void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt)
41 {
42 struct td *td;
43 struct packet *td_pkt;
44 struct ed *ed;
45 u32 trans_len;
46 bool td_done = false;
47
48 td = fhci_remove_td_from_frame(usb->actual_frame);
49 td_pkt = td->pkt;
50 trans_len = pkt->len;
51 td->status = pkt->status;
52 if (td->type == FHCI_TA_IN && td_pkt->info & PKT_DUMMY_PACKET) {
53 if ((td->data + td->actual_len) && trans_len)
54 memcpy(td->data + td->actual_len, pkt->data,
55 trans_len);
56 cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
57 }
58
59 recycle_frame(usb, pkt);
60
61 ed = td->ed;
62 if (ed->mode == FHCI_TF_ISO) {
63 if (ed->td_list.next->next != &ed->td_list) {
64 struct td *td_next =
65 list_entry(ed->td_list.next->next, struct td,
66 node);
67
68 td_next->start_frame = usb->actual_frame->frame_num;
69 }
70 td->actual_len = trans_len;
71 td_done = true;
72 } else if ((td->status & USB_TD_ERROR) &&
73 !(td->status & USB_TD_TX_ER_NAK)) {
74 /*
75 * There was an error on the transaction (but not NAK).
76 * If it is fatal error (data underrun, stall, bad pid or 3
77 * errors exceeded), mark this TD as done.
78 */
79 if ((td->status & USB_TD_RX_DATA_UNDERUN) ||
80 (td->status & USB_TD_TX_ER_STALL) ||
81 (td->status & USB_TD_RX_ER_PID) ||
82 (++td->error_cnt >= 3)) {
83 ed->state = FHCI_ED_HALTED;
84 td_done = true;
85
86 if (td->status & USB_TD_RX_DATA_UNDERUN) {
87 fhci_dbg(usb->fhci, "td err fu\n");
88 td->toggle = !td->toggle;
89 td->actual_len += trans_len;
90 } else {
91 fhci_dbg(usb->fhci, "td err f!u\n");
92 }
93 } else {
94 fhci_dbg(usb->fhci, "td err !f\n");
95 /* it is not a fatal error -retry this transaction */
96 td->nak_cnt = 0;
97 td->error_cnt++;
98 td->status = USB_TD_OK;
99 }
100 } else if (td->status & USB_TD_TX_ER_NAK) {
101 /* there was a NAK response */
102 fhci_vdbg(usb->fhci, "td nack\n");
103 td->nak_cnt++;
104 td->error_cnt = 0;
105 td->status = USB_TD_OK;
106 } else {
107 /* there was no error on transaction */
108 td->error_cnt = 0;
109 td->nak_cnt = 0;
110 td->toggle = !td->toggle;
111 td->actual_len += trans_len;
112
113 if (td->len == td->actual_len)
114 td_done = true;
115 }
116
117 if (td_done)
118 fhci_move_td_from_ed_to_done_list(usb, ed);
119 }
120
121 /*
122 * Flush all transmitted packets from BDs
123 * This routine is called when disabling the USB port to flush all
124 * transmissions that are already scheduled in the BDs
125 */
126 void fhci_flush_all_transmissions(struct fhci_usb *usb)
127 {
128 u8 mode;
129 struct td *td;
130
131 mode = in_8(&usb->fhci->regs->usb_usmod);
132 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
133
134 fhci_flush_bds(usb);
135
136 while ((td = fhci_peek_td_from_frame(usb->actual_frame)) != NULL) {
137 struct packet *pkt = td->pkt;
138
139 pkt->status = USB_TD_TX_ER_TIMEOUT;
140 fhci_transaction_confirm(usb, pkt);
141 }
142
143 usb->actual_frame->frame_status = FRAME_END_TRANSMISSION;
144
145 /* reset the event register */
146 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
147 /* enable the USB controller */
148 out_8(&usb->fhci->regs->usb_usmod, mode | USB_MODE_EN);
149 }
150
151 /*
152 * This function forms the packet and transmit the packet. This function
153 * will handle all endpoint type:ISO,interrupt,control and bulk
154 */
155 static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td)
156 {
157 u32 fw_transaction_time, len = 0;
158 struct packet *pkt;
159 u8 *data = NULL;
160
161 /* calcalate data address,len and toggle and then add the transaction */
162 if (td->toggle == USB_TD_TOGGLE_CARRY)
163 td->toggle = ed->toggle_carry;
164
165 switch (ed->mode) {
166 case FHCI_TF_ISO:
167 len = td->len;
168 if (td->type != FHCI_TA_IN)
169 data = td->data;
170 break;
171 case FHCI_TF_CTRL:
172 case FHCI_TF_BULK:
173 len = min(td->len - td->actual_len, ed->max_pkt_size);
174 if (!((td->type == FHCI_TA_IN) &&
175 ((len + td->actual_len) == td->len)))
176 data = td->data + td->actual_len;
177 break;
178 case FHCI_TF_INTR:
179 len = min(td->len, ed->max_pkt_size);
180 if (!((td->type == FHCI_TA_IN) &&
181 ((td->len + CRC_SIZE) >= ed->max_pkt_size)))
182 data = td->data;
183 break;
184 default:
185 break;
186 }
187
188 if (usb->port_status == FHCI_PORT_FULL)
189 fw_transaction_time = (((len + PROTOCOL_OVERHEAD) * 11) >> 4);
190 else
191 fw_transaction_time = ((len + PROTOCOL_OVERHEAD) * 6);
192
193 /* check if there's enough space in this frame to submit this TD */
194 if (usb->actual_frame->total_bytes + len + PROTOCOL_OVERHEAD >=
195 usb->max_bytes_per_frame) {
196 fhci_vdbg(usb->fhci, "not enough space in this frame: "
197 "%d %d %d\n", usb->actual_frame->total_bytes, len,
198 usb->max_bytes_per_frame);
199 return -1;
200 }
201
202 /* check if there's enough time in this frame to submit this TD */
203 if (usb->actual_frame->frame_status != FRAME_IS_PREPARED &&
204 (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION ||
205 (fw_transaction_time + usb->sw_transaction_time >=
206 1000 - fhci_get_sof_timer_count(usb)))) {
207 fhci_dbg(usb->fhci, "not enough time in this frame\n");
208 return -1;
209 }
210
211 /* update frame object fields before transmitting */
212 pkt = cq_get(&usb->ep0->empty_frame_Q);
213 if (!pkt) {
214 fhci_dbg(usb->fhci, "there is no empty frame\n");
215 return -1;
216 }
217 td->pkt = pkt;
218
219 pkt->info = 0;
220 if (data == NULL) {
221 data = cq_get(&usb->ep0->dummy_packets_Q);
222 BUG_ON(!data);
223 pkt->info = PKT_DUMMY_PACKET;
224 }
225 pkt->data = data;
226 pkt->len = len;
227 pkt->status = USB_TD_OK;
228 /* update TD status field before transmitting */
229 td->status = USB_TD_INPROGRESS;
230 /* update actual frame time object with the actual transmission */
231 usb->actual_frame->total_bytes += (len + PROTOCOL_OVERHEAD);
232 fhci_add_td_to_frame(usb->actual_frame, td);
233
234 if (usb->port_status != FHCI_PORT_FULL &&
235 usb->port_status != FHCI_PORT_LOW) {
236 pkt->status = USB_TD_TX_ER_TIMEOUT;
237 pkt->len = 0;
238 fhci_transaction_confirm(usb, pkt);
239 } else if (fhci_host_transaction(usb, pkt, td->type, ed->dev_addr,
240 ed->ep_addr, ed->mode, ed->speed, td->toggle)) {
241 /* remove TD from actual frame */
242 list_del_init(&td->frame_lh);
243 td->status = USB_TD_OK;
244 if (pkt->info & PKT_DUMMY_PACKET)
245 cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
246 recycle_frame(usb, pkt);
247 usb->actual_frame->total_bytes -= (len + PROTOCOL_OVERHEAD);
248 fhci_err(usb->fhci, "host transaction failed\n");
249 return -1;
250 }
251
252 return len;
253 }
254
255 static void move_head_to_tail(struct list_head *list)
256 {
257 struct list_head *node = list->next;
258
259 if (!list_empty(list)) {
260 list_move_tail(node, list);
261 }
262 }
263
264 /*
265 * This function goes through the endpoint list and schedules the
266 * transactions within this list
267 */
268 static int scan_ed_list(struct fhci_usb *usb,
269 struct list_head *list, enum fhci_tf_mode list_type)
270 {
271 static const int frame_part[4] = {
272 [FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME,
273 [FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME *
274 MAX_PERIODIC_FRAME_USAGE) / 100,
275 [FHCI_TF_BULK] = MAX_BYTES_PER_FRAME,
276 [FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME *
277 MAX_PERIODIC_FRAME_USAGE) / 100
278 };
279 struct ed *ed;
280 struct td *td;
281 int ans = 1;
282 u32 save_transaction_time = usb->sw_transaction_time;
283
284 list_for_each_entry(ed, list, node) {
285 td = ed->td_head;
286
287 if (!td || td->status == USB_TD_INPROGRESS)
288 continue;
289
290 if (ed->state != FHCI_ED_OPER) {
291 if (ed->state == FHCI_ED_URB_DEL) {
292 td->status = USB_TD_OK;
293 fhci_move_td_from_ed_to_done_list(usb, ed);
294 ed->state = FHCI_ED_SKIP;
295 }
296 continue;
297 }
298
299 /*
300 * if it isn't interrupt pipe or it is not iso pipe and the
301 * interval time passed
302 */
303 if ((list_type == FHCI_TF_INTR || list_type == FHCI_TF_ISO) &&
304 (((usb->actual_frame->frame_num -
305 td->start_frame) & 0x7ff) < td->interval))
306 continue;
307
308 if (add_packet(usb, ed, td) < 0)
309 continue;
310
311 /* update time stamps in the TD */
312 td->start_frame = usb->actual_frame->frame_num;
313 usb->sw_transaction_time += save_transaction_time;
314
315 if (usb->actual_frame->total_bytes >=
316 usb->max_bytes_per_frame) {
317 usb->actual_frame->frame_status =
318 FRAME_DATA_END_TRANSMISSION;
319 fhci_push_dummy_bd(usb->ep0);
320 ans = 0;
321 break;
322 }
323
324 if (usb->actual_frame->total_bytes >= frame_part[list_type])
325 break;
326 }
327
328 /* be fair to each ED(move list head around) */
329 move_head_to_tail(list);
330 usb->sw_transaction_time = save_transaction_time;
331
332 return ans;
333 }
334
335 static u32 rotate_frames(struct fhci_usb *usb)
336 {
337 struct fhci_hcd *fhci = usb->fhci;
338
339 if (!list_empty(&usb->actual_frame->tds_list)) {
340 if ((((in_be16(&fhci->pram->frame_num) & 0x07ff) -
341 usb->actual_frame->frame_num) & 0x7ff) > 5)
342 fhci_flush_actual_frame(usb);
343 else
344 return -EINVAL;
345 }
346
347 usb->actual_frame->frame_status = FRAME_IS_PREPARED;
348 usb->actual_frame->frame_num = in_be16(&fhci->pram->frame_num) & 0x7ff;
349 usb->actual_frame->total_bytes = 0;
350
351 return 0;
352 }
353
354 /*
355 * This function schedule the USB transaction and will process the
356 * endpoint in the following order: iso, interrupt, control and bulk.
357 */
358 void fhci_schedule_transactions(struct fhci_usb *usb)
359 {
360 int left = 1;
361
362 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION)
363 if (rotate_frames(usb) != 0)
364 return;
365
366 if (usb->actual_frame->frame_status & FRAME_END_TRANSMISSION)
367 return;
368
369 if (usb->actual_frame->total_bytes == 0) {
370 /*
371 * schedule the next available ISO transfer
372 *or next stage of the ISO transfer
373 */
374 scan_ed_list(usb, &usb->hc_list->iso_list, FHCI_TF_ISO);
375
376 /*
377 * schedule the next available interrupt transfer or
378 * the next stage of the interrupt transfer
379 */
380 scan_ed_list(usb, &usb->hc_list->intr_list, FHCI_TF_INTR);
381
382 /*
383 * schedule the next available control transfer
384 * or the next stage of the control transfer
385 */
386 left = scan_ed_list(usb, &usb->hc_list->ctrl_list,
387 FHCI_TF_CTRL);
388 }
389
390 /*
391 * schedule the next available bulk transfer or the next stage of the
392 * bulk transfer
393 */
394 if (left > 0)
395 scan_ed_list(usb, &usb->hc_list->bulk_list, FHCI_TF_BULK);
396 }
397
398 /* Handles SOF interrupt */
399 static void sof_interrupt(struct fhci_hcd *fhci)
400 {
401 struct fhci_usb *usb = fhci->usb_lld;
402
403 if ((usb->port_status == FHCI_PORT_DISABLED) &&
404 (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_CONNECTION) &&
405 !(usb->vroot_hub->port.wPortChange & USB_PORT_STAT_C_CONNECTION)) {
406 if (usb->vroot_hub->port.wPortStatus & USB_PORT_STAT_LOW_SPEED)
407 usb->port_status = FHCI_PORT_LOW;
408 else
409 usb->port_status = FHCI_PORT_FULL;
410 /* Disable IDLE */
411 usb->saved_msk &= ~USB_E_IDLE_MASK;
412 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
413 }
414
415 gtm_set_exact_timer16(fhci->timer, usb->max_frame_usage, false);
416
417 fhci_host_transmit_actual_frame(usb);
418 usb->actual_frame->frame_status = FRAME_IS_TRANSMITTED;
419
420 fhci_schedule_transactions(usb);
421 }
422
423 /* Handles device disconnected interrupt on port */
424 void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci)
425 {
426 struct fhci_usb *usb = fhci->usb_lld;
427
428 fhci_dbg(fhci, "-> %s\n", __func__);
429
430 fhci_usb_disable_interrupt(usb);
431 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
432 usb->port_status = FHCI_PORT_DISABLED;
433
434 fhci_stop_sof_timer(fhci);
435
436 /* Enable IDLE since we want to know if something comes along */
437 usb->saved_msk |= USB_E_IDLE_MASK;
438 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
439
440 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_CONNECTION;
441 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_CONNECTION;
442 usb->max_bytes_per_frame = 0;
443 fhci_usb_enable_interrupt(usb);
444
445 fhci_dbg(fhci, "<- %s\n", __func__);
446 }
447
448 /* detect a new device connected on the USB port */
449 void fhci_device_connected_interrupt(struct fhci_hcd *fhci)
450 {
451
452 struct fhci_usb *usb = fhci->usb_lld;
453 int state;
454 int ret;
455
456 fhci_dbg(fhci, "-> %s\n", __func__);
457
458 fhci_usb_disable_interrupt(usb);
459 state = fhci_ioports_check_bus_state(fhci);
460
461 /* low-speed device was connected to the USB port */
462 if (state == 1) {
463 ret = qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
464 if (ret) {
465 fhci_warn(fhci, "Low-Speed device is not supported, "
466 "try use BRGx\n");
467 goto out;
468 }
469
470 usb->port_status = FHCI_PORT_LOW;
471 setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
472 usb->vroot_hub->port.wPortStatus |=
473 (USB_PORT_STAT_LOW_SPEED |
474 USB_PORT_STAT_CONNECTION);
475 usb->vroot_hub->port.wPortChange |=
476 USB_PORT_STAT_C_CONNECTION;
477 usb->max_bytes_per_frame =
478 (MAX_BYTES_PER_FRAME >> 3) - 7;
479 fhci_port_enable(usb);
480 } else if (state == 2) {
481 ret = qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
482 if (ret) {
483 fhci_warn(fhci, "Full-Speed device is not supported, "
484 "try use CLKx\n");
485 goto out;
486 }
487
488 usb->port_status = FHCI_PORT_FULL;
489 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS);
490 usb->vroot_hub->port.wPortStatus &=
491 ~USB_PORT_STAT_LOW_SPEED;
492 usb->vroot_hub->port.wPortStatus |=
493 USB_PORT_STAT_CONNECTION;
494 usb->vroot_hub->port.wPortChange |=
495 USB_PORT_STAT_C_CONNECTION;
496 usb->max_bytes_per_frame = (MAX_BYTES_PER_FRAME - 15);
497 fhci_port_enable(usb);
498 }
499 out:
500 fhci_usb_enable_interrupt(usb);
501 fhci_dbg(fhci, "<- %s\n", __func__);
502 }
503
504 irqreturn_t fhci_frame_limit_timer_irq(int irq, void *_hcd)
505 {
506 struct usb_hcd *hcd = _hcd;
507 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
508 struct fhci_usb *usb = fhci->usb_lld;
509
510 spin_lock(&fhci->lock);
511
512 gtm_set_exact_timer16(fhci->timer, 1000, false);
513
514 if (usb->actual_frame->frame_status == FRAME_IS_TRANSMITTED) {
515 usb->actual_frame->frame_status = FRAME_TIMER_END_TRANSMISSION;
516 fhci_push_dummy_bd(usb->ep0);
517 }
518
519 fhci_schedule_transactions(usb);
520
521 spin_unlock(&fhci->lock);
522
523 return IRQ_HANDLED;
524 }
525
526 /* Cancel transmission on the USB endpoint */
527 static void abort_transmission(struct fhci_usb *usb)
528 {
529 fhci_dbg(usb->fhci, "-> %s\n", __func__);
530 /* issue stop Tx command */
531 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0);
532 /* flush Tx FIFOs */
533 out_8(&usb->fhci->regs->usb_uscom, USB_CMD_FLUSH_FIFO | EP_ZERO);
534 udelay(1000);
535 /* reset Tx BDs */
536 fhci_flush_bds(usb);
537 /* issue restart Tx command */
538 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, EP_ZERO, 0);
539 fhci_dbg(usb->fhci, "<- %s\n", __func__);
540 }
541
542 irqreturn_t fhci_irq(struct usb_hcd *hcd)
543 {
544 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
545 struct fhci_usb *usb;
546 u16 usb_er = 0;
547 unsigned long flags;
548
549 spin_lock_irqsave(&fhci->lock, flags);
550
551 usb = fhci->usb_lld;
552
553 usb_er |= in_be16(&usb->fhci->regs->usb_usber) &
554 in_be16(&usb->fhci->regs->usb_usbmr);
555
556 /* clear event bits for next time */
557 out_be16(&usb->fhci->regs->usb_usber, usb_er);
558
559 fhci_dbg_isr(fhci, usb_er);
560
561 if (usb_er & USB_E_RESET_MASK) {
562 if ((usb->port_status == FHCI_PORT_FULL) ||
563 (usb->port_status == FHCI_PORT_LOW)) {
564 fhci_device_disconnected_interrupt(fhci);
565 usb_er &= ~USB_E_IDLE_MASK;
566 } else if (usb->port_status == FHCI_PORT_WAITING) {
567 usb->port_status = FHCI_PORT_DISCONNECTING;
568
569 /* Turn on IDLE since we want to disconnect */
570 usb->saved_msk |= USB_E_IDLE_MASK;
571 out_be16(&usb->fhci->regs->usb_usber,
572 usb->saved_msk);
573 } else if (usb->port_status == FHCI_PORT_DISABLED) {
574 if (fhci_ioports_check_bus_state(fhci) == 1)
575 fhci_device_connected_interrupt(fhci);
576 }
577 usb_er &= ~USB_E_RESET_MASK;
578 }
579
580 if (usb_er & USB_E_MSF_MASK) {
581 abort_transmission(fhci->usb_lld);
582 usb_er &= ~USB_E_MSF_MASK;
583 }
584
585 if (usb_er & (USB_E_SOF_MASK | USB_E_SFT_MASK)) {
586 sof_interrupt(fhci);
587 usb_er &= ~(USB_E_SOF_MASK | USB_E_SFT_MASK);
588 }
589
590 if (usb_er & USB_E_TXB_MASK) {
591 fhci_tx_conf_interrupt(fhci->usb_lld);
592 usb_er &= ~USB_E_TXB_MASK;
593 }
594
595 if (usb_er & USB_E_TXE1_MASK) {
596 fhci_tx_conf_interrupt(fhci->usb_lld);
597 usb_er &= ~USB_E_TXE1_MASK;
598 }
599
600 if (usb_er & USB_E_IDLE_MASK) {
601 if (usb->port_status == FHCI_PORT_DISABLED) {
602 usb_er &= ~USB_E_RESET_MASK;
603 fhci_device_connected_interrupt(fhci);
604 } else if (usb->port_status ==
605 FHCI_PORT_DISCONNECTING) {
606 /* XXX usb->port_status = FHCI_PORT_WAITING; */
607 /* Disable IDLE */
608 usb->saved_msk &= ~USB_E_IDLE_MASK;
609 out_be16(&usb->fhci->regs->usb_usbmr,
610 usb->saved_msk);
611 } else {
612 fhci_dbg_isr(fhci, -1);
613 }
614
615 usb_er &= ~USB_E_IDLE_MASK;
616 }
617
618 spin_unlock_irqrestore(&fhci->lock, flags);
619
620 return IRQ_HANDLED;
621 }
622
623
624 /*
625 * Process normal completions(error or success) and clean the schedule.
626 *
627 * This is the main path for handing urbs back to drivers. The only other patth
628 * is process_del_list(),which unlinks URBs by scanning EDs,instead of scanning
629 * the (re-reversed) done list as this does.
630 */
631 static void process_done_list(unsigned long data)
632 {
633 struct urb *urb;
634 struct ed *ed;
635 struct td *td;
636 struct urb_priv *urb_priv;
637 struct fhci_hcd *fhci = (struct fhci_hcd *)data;
638
639 disable_irq(fhci->timer->irq);
640 disable_irq(fhci_to_hcd(fhci)->irq);
641 spin_lock(&fhci->lock);
642
643 td = fhci_remove_td_from_done_list(fhci->hc_list);
644 while (td != NULL) {
645 urb = td->urb;
646 urb_priv = urb->hcpriv;
647 ed = td->ed;
648
649 /* update URB's length and status from TD */
650 fhci_done_td(urb, td);
651 urb_priv->tds_cnt++;
652
653 /*
654 * if all this urb's TDs are done, call complete()
655 * Interrupt transfers are the onley special case:
656 * they are reissued,until "deleted" by usb_unlink_urb
657 * (real work done in a SOF intr, by process_del_list)
658 */
659 if (urb_priv->tds_cnt == urb_priv->num_of_tds) {
660 fhci_urb_complete_free(fhci, urb);
661 } else if (urb_priv->state == URB_DEL &&
662 ed->state == FHCI_ED_SKIP) {
663 fhci_del_ed_list(fhci, ed);
664 ed->state = FHCI_ED_OPER;
665 } else if (ed->state == FHCI_ED_HALTED) {
666 urb_priv->state = URB_DEL;
667 ed->state = FHCI_ED_URB_DEL;
668 fhci_del_ed_list(fhci, ed);
669 ed->state = FHCI_ED_OPER;
670 }
671
672 td = fhci_remove_td_from_done_list(fhci->hc_list);
673 }
674
675 spin_unlock(&fhci->lock);
676 enable_irq(fhci->timer->irq);
677 enable_irq(fhci_to_hcd(fhci)->irq);
678 }
679
680 DECLARE_TASKLET(fhci_tasklet, process_done_list, 0);
681
682 /* transfer complted callback */
683 u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci)
684 {
685 if (!fhci->process_done_task->state)
686 tasklet_schedule(fhci->process_done_task);
687 return 0;
688 }
689
690 /*
691 * adds urb to the endpoint descriptor list
692 * arguments:
693 * fhci data structure for the Low level host controller
694 * ep USB Host endpoint data structure
695 * urb USB request block data structure
696 */
697 void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb)
698 {
699 struct ed *ed = urb->ep->hcpriv;
700 struct urb_priv *urb_priv = urb->hcpriv;
701 u32 data_len = urb->transfer_buffer_length;
702 int urb_state = 0;
703 int toggle = 0;
704 struct td *td;
705 u8 *data;
706 u16 cnt = 0;
707
708 if (ed == NULL) {
709 ed = fhci_get_empty_ed(fhci);
710 ed->dev_addr = usb_pipedevice(urb->pipe);
711 ed->ep_addr = usb_pipeendpoint(urb->pipe);
712 switch (usb_pipetype(urb->pipe)) {
713 case PIPE_CONTROL:
714 ed->mode = FHCI_TF_CTRL;
715 break;
716 case PIPE_BULK:
717 ed->mode = FHCI_TF_BULK;
718 break;
719 case PIPE_INTERRUPT:
720 ed->mode = FHCI_TF_INTR;
721 break;
722 case PIPE_ISOCHRONOUS:
723 ed->mode = FHCI_TF_ISO;
724 break;
725 default:
726 break;
727 }
728 ed->speed = (urb->dev->speed == USB_SPEED_LOW) ?
729 FHCI_LOW_SPEED : FHCI_FULL_SPEED;
730 ed->max_pkt_size = usb_maxpacket(urb->dev,
731 urb->pipe, usb_pipeout(urb->pipe));
732 urb->ep->hcpriv = ed;
733 fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n",
734 ed->speed, ed->max_pkt_size);
735 }
736
737 /* for ISO transfer calculate start frame index */
738 if (ed->mode == FHCI_TF_ISO) {
739 /* Ignore the possibility of underruns */
740 urb->start_frame = ed->td_head ? ed->next_iso :
741 get_frame_num(fhci);
742 ed->next_iso = (urb->start_frame + urb->interval *
743 urb->number_of_packets) & 0x07ff;
744 }
745
746 /*
747 * OHCI handles the DATA toggle itself,we just use the USB
748 * toggle bits
749 */
750 if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
751 usb_pipeout(urb->pipe)))
752 toggle = USB_TD_TOGGLE_CARRY;
753 else {
754 toggle = USB_TD_TOGGLE_DATA0;
755 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
756 usb_pipeout(urb->pipe), 1);
757 }
758
759 urb_priv->tds_cnt = 0;
760 urb_priv->ed = ed;
761 if (data_len > 0)
762 data = urb->transfer_buffer;
763 else
764 data = NULL;
765
766 switch (ed->mode) {
767 case FHCI_TF_BULK:
768 if (urb->transfer_flags & URB_ZERO_PACKET &&
769 urb->transfer_buffer_length > 0 &&
770 ((urb->transfer_buffer_length %
771 usb_maxpacket(urb->dev, urb->pipe,
772 usb_pipeout(urb->pipe))) == 0))
773 urb_state = US_BULK0;
774 while (data_len > 4096) {
775 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
776 usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
777 FHCI_TA_IN,
778 cnt ? USB_TD_TOGGLE_CARRY :
779 toggle,
780 data, 4096, 0, 0, true);
781 data += 4096;
782 data_len -= 4096;
783 cnt++;
784 }
785
786 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
787 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN,
788 cnt ? USB_TD_TOGGLE_CARRY : toggle,
789 data, data_len, 0, 0, true);
790 cnt++;
791
792 if (urb->transfer_flags & URB_ZERO_PACKET &&
793 cnt < urb_priv->num_of_tds) {
794 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
795 usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
796 FHCI_TA_IN,
797 USB_TD_TOGGLE_CARRY, NULL, 0, 0, 0, true);
798 cnt++;
799 }
800 break;
801 case FHCI_TF_INTR:
802 urb->start_frame = get_frame_num(fhci) + 1;
803 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
804 usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN,
805 USB_TD_TOGGLE_DATA0, data, data_len,
806 urb->interval, urb->start_frame, true);
807 break;
808 case FHCI_TF_CTRL:
809 ed->dev_addr = usb_pipedevice(urb->pipe);
810 ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe,
811 usb_pipeout(urb->pipe));
812 /* setup stage */
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 /* data stage */
817 if (data_len > 0) {
818 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
819 usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
820 FHCI_TA_IN,
821 USB_TD_TOGGLE_DATA1, data, data_len, 0, 0,
822 true);
823 }
824
825 /* status stage */
826 if (data_len > 0)
827 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
828 (usb_pipeout(urb->pipe) ? FHCI_TA_IN :
829 FHCI_TA_OUT),
830 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true);
831 else
832 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++,
833 FHCI_TA_IN,
834 USB_TD_TOGGLE_DATA1, data, 0, 0, 0, true);
835
836 urb_state = US_CTRL_SETUP;
837 break;
838 case FHCI_TF_ISO:
839 for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
840 u16 frame = urb->start_frame;
841
842 /*
843 * FIXME scheduling should handle frame counter
844 * roll-around ... exotic case (and OHCI has
845 * a 2^16 iso range, vs other HCs max of 2^10)
846 */
847 frame += cnt * urb->interval;
848 frame &= 0x07ff;
849 td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
850 usb_pipeout(urb->pipe) ? FHCI_TA_OUT :
851 FHCI_TA_IN,
852 USB_TD_TOGGLE_DATA0,
853 data + urb->iso_frame_desc[cnt].offset,
854 urb->iso_frame_desc[cnt].length,
855 urb->interval, frame, true);
856 }
857 break;
858 default:
859 break;
860 }
861
862 /*
863 * set the state of URB
864 * control pipe:3 states -- setup,data,status
865 * interrupt and bulk pipe:1 state -- data
866 */
867 urb->pipe &= ~0x1f;
868 urb->pipe |= urb_state & 0x1f;
869
870 urb_priv->state = URB_INPROGRESS;
871
872 if (!ed->td_head) {
873 ed->state = FHCI_ED_OPER;
874 switch (ed->mode) {
875 case FHCI_TF_CTRL:
876 list_add(&ed->node, &fhci->hc_list->ctrl_list);
877 break;
878 case FHCI_TF_BULK:
879 list_add(&ed->node, &fhci->hc_list->bulk_list);
880 break;
881 case FHCI_TF_INTR:
882 list_add(&ed->node, &fhci->hc_list->intr_list);
883 break;
884 case FHCI_TF_ISO:
885 list_add(&ed->node, &fhci->hc_list->iso_list);
886 break;
887 default:
888 break;
889 }
890 }
891
892 fhci_add_tds_to_ed(ed, urb_priv->tds, urb_priv->num_of_tds);
893 fhci->active_urbs++;
894 }
Linux with added FPC-III support