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236dd4d1 AV |
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) { | |
9525dcb3 | 579 | if (fhci_ioports_check_bus_state(fhci) == 1) |
236dd4d1 AV |
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) { | |
9525dcb3 | 606 | if (usb->port_status == FHCI_PORT_DISABLED) { |
236dd4d1 AV |
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 | /* | |
af901ca1 | 630 | * Process normal completions(error or success) and clean the schedule. |
236dd4d1 AV |
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 | } |