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path: root/drivers/usb/host/fhci-sched.c
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-rw-r--r--drivers/usb/host/fhci-sched.c888
1 files changed, 888 insertions, 0 deletions
diff --git a/drivers/usb/host/fhci-sched.c b/drivers/usb/host/fhci-sched.c
new file mode 100644
index 000000000000..bb63b68ddb77
--- /dev/null
+++ b/drivers/usb/host/fhci-sched.c
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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
32static 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 */
44void 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 */
130void 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 */
159static 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
259static 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 */
273static 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
340static 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 */
363void 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 */
404static 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 */
429void 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 */
454void 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 }
504out:
505 fhci_usb_enable_interrupt(usb);
506 fhci_dbg(fhci, "<- %s\n", __func__);
507}
508
509irqreturn_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 */
532static 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
547irqreturn_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 */
640static 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
689DECLARE_TASKLET(fhci_tasklet, process_done_list, 0);
690
691/* transfer complted callback */
692u32 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 */
706void 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}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-01 03:15:05 -0500