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(kfifo: &usb->ep0->empty_frame_Q, p: 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(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(kfifo: &usb->ep0->dummy_packets_Q, p: 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(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(kfifo: &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(kfifo: &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(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, trans_type: td->type, dest_addr: ed->dev_addr, |
240 | dest_ep: ed->ep_addr, trans_mode: ed->mode, dest_speed: ed->speed, data_toggle: td->toggle)) { |
241 | /* remove TD from actual frame */ |
242 | list_del_init(entry: &td->frame_lh); |
243 | td->status = USB_TD_OK; |
244 | if (pkt->info & PKT_DUMMY_PACKET) |
245 | cq_put(kfifo: &usb->ep0->dummy_packets_Q, p: 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(head: list)) { |
260 | list_move_tail(list: node, head: 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(ep: 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(head: &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, list: &usb->hc_list->iso_list, list_type: 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, list: &usb->hc_list->intr_list, list_type: 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, list: &usb->hc_list->ctrl_list, |
387 | list_type: 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, list: &usb->hc_list->bulk_list, list_type: 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(clk: 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(lld: usb); |
480 | } else if (state == 2) { |
481 | ret = qe_usb_clock_set(clk: 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(lld: 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(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(ep: usb->ep0); |
517 | } |
518 | |
519 | fhci_schedule_transactions(usb); |
520 | |
521 | spin_unlock(lock: &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, cmd_input: 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, cmd_input: 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(usb: 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(usb: 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(usb: 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, usb_er: -1); |
613 | } |
614 | |
615 | usb_er &= ~USB_E_IDLE_MASK; |
616 | } |
617 | |
618 | spin_unlock_irqrestore(lock: &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(irq: fhci->timer->irq); |
640 | disable_irq(irq: fhci_to_hcd(fhci)->irq); |
641 | spin_lock(lock: &fhci->lock); |
642 | |
643 | td = fhci_remove_td_from_done_list(p_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(p_list: fhci->hc_list); |
673 | } |
674 | |
675 | spin_unlock(lock: &fhci->lock); |
676 | enable_irq(irq: fhci->timer->irq); |
677 | enable_irq(irq: fhci_to_hcd(fhci)->irq); |
678 | } |
679 | |
680 | DECLARE_TASKLET_OLD(fhci_tasklet, process_done_list); |
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(t: 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 | u8 *data; |
705 | u16 cnt = 0; |
706 | |
707 | if (ed == NULL) { |
708 | ed = fhci_get_empty_ed(fhci); |
709 | ed->dev_addr = usb_pipedevice(urb->pipe); |
710 | ed->ep_addr = usb_pipeendpoint(urb->pipe); |
711 | switch (usb_pipetype(urb->pipe)) { |
712 | case PIPE_CONTROL: |
713 | ed->mode = FHCI_TF_CTRL; |
714 | break; |
715 | case PIPE_BULK: |
716 | ed->mode = FHCI_TF_BULK; |
717 | break; |
718 | case PIPE_INTERRUPT: |
719 | ed->mode = FHCI_TF_INTR; |
720 | break; |
721 | case PIPE_ISOCHRONOUS: |
722 | ed->mode = FHCI_TF_ISO; |
723 | break; |
724 | default: |
725 | break; |
726 | } |
727 | ed->speed = (urb->dev->speed == USB_SPEED_LOW) ? |
728 | FHCI_LOW_SPEED : FHCI_FULL_SPEED; |
729 | ed->max_pkt_size = usb_endpoint_maxp(epd: &urb->ep->desc); |
730 | urb->ep->hcpriv = ed; |
731 | fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n" , |
732 | ed->speed, ed->max_pkt_size); |
733 | } |
734 | |
735 | /* for ISO transfer calculate start frame index */ |
736 | if (ed->mode == FHCI_TF_ISO) { |
737 | /* Ignore the possibility of underruns */ |
738 | urb->start_frame = ed->td_head ? ed->next_iso : |
739 | get_frame_num(fhci); |
740 | ed->next_iso = (urb->start_frame + urb->interval * |
741 | urb->number_of_packets) & 0x07ff; |
742 | } |
743 | |
744 | /* |
745 | * OHCI handles the DATA toggle itself,we just use the USB |
746 | * toggle bits |
747 | */ |
748 | if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), |
749 | usb_pipeout(urb->pipe))) |
750 | toggle = USB_TD_TOGGLE_CARRY; |
751 | else { |
752 | toggle = USB_TD_TOGGLE_DATA0; |
753 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), |
754 | usb_pipeout(urb->pipe), 1); |
755 | } |
756 | |
757 | urb_priv->tds_cnt = 0; |
758 | urb_priv->ed = ed; |
759 | if (data_len > 0) |
760 | data = urb->transfer_buffer; |
761 | else |
762 | data = NULL; |
763 | |
764 | switch (ed->mode) { |
765 | case FHCI_TF_BULK: |
766 | if (urb->transfer_flags & URB_ZERO_PACKET && |
767 | urb->transfer_buffer_length > 0 && |
768 | ((urb->transfer_buffer_length % |
769 | usb_endpoint_maxp(epd: &urb->ep->desc)) == 0)) |
770 | urb_state = US_BULK0; |
771 | while (data_len > 4096) { |
772 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt, |
773 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : |
774 | FHCI_TA_IN, |
775 | toggle: cnt ? USB_TD_TOGGLE_CARRY : |
776 | toggle, |
777 | data, len: 4096, interval: 0, start_frame: 0, ioc: true); |
778 | data += 4096; |
779 | data_len -= 4096; |
780 | cnt++; |
781 | } |
782 | |
783 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt, |
784 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, |
785 | toggle: cnt ? USB_TD_TOGGLE_CARRY : toggle, |
786 | data, len: data_len, interval: 0, start_frame: 0, ioc: true); |
787 | cnt++; |
788 | |
789 | if (urb->transfer_flags & URB_ZERO_PACKET && |
790 | cnt < urb_priv->num_of_tds) { |
791 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt, |
792 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : |
793 | FHCI_TA_IN, |
794 | USB_TD_TOGGLE_CARRY, NULL, len: 0, interval: 0, start_frame: 0, ioc: true); |
795 | cnt++; |
796 | } |
797 | break; |
798 | case FHCI_TF_INTR: |
799 | urb->start_frame = get_frame_num(fhci) + 1; |
800 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt++, |
801 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : FHCI_TA_IN, |
802 | USB_TD_TOGGLE_DATA0, data, len: data_len, |
803 | interval: urb->interval, start_frame: urb->start_frame, ioc: true); |
804 | break; |
805 | case FHCI_TF_CTRL: |
806 | ed->dev_addr = usb_pipedevice(urb->pipe); |
807 | ed->max_pkt_size = usb_endpoint_maxp(epd: &urb->ep->desc); |
808 | |
809 | /* setup stage */ |
810 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt++, type: FHCI_TA_SETUP, |
811 | USB_TD_TOGGLE_DATA0, data: urb->setup_packet, len: 8, interval: 0, start_frame: 0, ioc: true); |
812 | |
813 | /* data stage */ |
814 | if (data_len > 0) { |
815 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt++, |
816 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : |
817 | FHCI_TA_IN, |
818 | USB_TD_TOGGLE_DATA1, data, len: data_len, interval: 0, start_frame: 0, |
819 | ioc: true); |
820 | } |
821 | |
822 | /* status stage */ |
823 | if (data_len > 0) |
824 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt++, |
825 | type: (usb_pipeout(urb->pipe) ? FHCI_TA_IN : |
826 | FHCI_TA_OUT), |
827 | USB_TD_TOGGLE_DATA1, data, len: 0, interval: 0, start_frame: 0, ioc: true); |
828 | else |
829 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt++, |
830 | type: FHCI_TA_IN, |
831 | USB_TD_TOGGLE_DATA1, data, len: 0, interval: 0, start_frame: 0, ioc: true); |
832 | |
833 | urb_state = US_CTRL_SETUP; |
834 | break; |
835 | case FHCI_TF_ISO: |
836 | for (cnt = 0; cnt < urb->number_of_packets; cnt++) { |
837 | u16 frame = urb->start_frame; |
838 | |
839 | /* |
840 | * FIXME scheduling should handle frame counter |
841 | * roll-around ... exotic case (and OHCI has |
842 | * a 2^16 iso range, vs other HCs max of 2^10) |
843 | */ |
844 | frame += cnt * urb->interval; |
845 | frame &= 0x07ff; |
846 | fhci_td_fill(fhci, urb, urb_priv, ed, index: cnt, |
847 | usb_pipeout(urb->pipe) ? FHCI_TA_OUT : |
848 | FHCI_TA_IN, |
849 | USB_TD_TOGGLE_DATA0, |
850 | data: data + urb->iso_frame_desc[cnt].offset, |
851 | len: urb->iso_frame_desc[cnt].length, |
852 | interval: urb->interval, start_frame: frame, ioc: true); |
853 | } |
854 | break; |
855 | default: |
856 | break; |
857 | } |
858 | |
859 | /* |
860 | * set the state of URB |
861 | * control pipe:3 states -- setup,data,status |
862 | * interrupt and bulk pipe:1 state -- data |
863 | */ |
864 | urb->pipe &= ~0x1f; |
865 | urb->pipe |= urb_state & 0x1f; |
866 | |
867 | urb_priv->state = URB_INPROGRESS; |
868 | |
869 | if (!ed->td_head) { |
870 | ed->state = FHCI_ED_OPER; |
871 | switch (ed->mode) { |
872 | case FHCI_TF_CTRL: |
873 | list_add(new: &ed->node, head: &fhci->hc_list->ctrl_list); |
874 | break; |
875 | case FHCI_TF_BULK: |
876 | list_add(new: &ed->node, head: &fhci->hc_list->bulk_list); |
877 | break; |
878 | case FHCI_TF_INTR: |
879 | list_add(new: &ed->node, head: &fhci->hc_list->intr_list); |
880 | break; |
881 | case FHCI_TF_ISO: |
882 | list_add(new: &ed->node, head: &fhci->hc_list->iso_list); |
883 | break; |
884 | default: |
885 | break; |
886 | } |
887 | } |
888 | |
889 | fhci_add_tds_to_ed(ed, td_list: urb_priv->tds, number: urb_priv->num_of_tds); |
890 | fhci->active_urbs++; |
891 | } |
892 | |