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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
236dd4d1 AV |
2 | /* |
3 | * Freescale QUICC Engine USB Host Controller Driver | |
4 | * | |
273d2357 | 5 | * Copyright (c) Freescale Semicondutor, Inc. 2006, 2011. |
236dd4d1 AV |
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> | |
236dd4d1 AV |
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> | |
27729aad | 23 | #include <linux/usb/hcd.h> |
7aa1aa6e | 24 | #include <soc/fsl/qe/qe.h> |
236dd4d1 | 25 | #include <asm/fsl_gtm.h> |
236dd4d1 AV |
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 | ||
45465487 | 36 | cq_put(&usb->ep0->empty_frame_Q, pkt); |
236dd4d1 AV |
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); | |
45465487 | 56 | cq_put(&usb->ep0->dummy_packets_Q, pkt->data); |
236dd4d1 AV |
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 | |
698f9315 | 124 | * transmissions that are already scheduled in the BDs |
236dd4d1 AV |
125 | */ |
126 | void fhci_flush_all_transmissions(struct fhci_usb *usb) | |
127 | { | |
128 | u8 mode; | |
129 | struct td *td; | |
130 | ||
cf61fdb9 GMF |
131 | mode = in_8(&usb->fhci->regs->usb_usmod); |
132 | clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN); | |
236dd4d1 AV |
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 */ | |
cf61fdb9 | 146 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
236dd4d1 | 147 | /* enable the USB controller */ |
cf61fdb9 | 148 | out_8(&usb->fhci->regs->usb_usmod, mode | USB_MODE_EN); |
236dd4d1 AV |
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 */ | |
45465487 | 212 | pkt = cq_get(&usb->ep0->empty_frame_Q); |
236dd4d1 AV |
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) { | |
45465487 | 221 | data = cq_get(&usb->ep0->dummy_packets_Q); |
236dd4d1 AV |
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) | |
45465487 | 245 | cq_put(&usb->ep0->dummy_packets_Q, pkt->data); |
236dd4d1 AV |
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)) { | |
027c5215 | 260 | list_move_tail(node, list); |
236dd4d1 AV |
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 | ||
2b4ba254 | 287 | if (!td || td->status == USB_TD_INPROGRESS) |
236dd4d1 AV |
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; | |
cf61fdb9 | 412 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
236dd4d1 AV |
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); | |
cf61fdb9 | 431 | clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); |
236dd4d1 AV |
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; | |
cf61fdb9 | 438 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
236dd4d1 AV |
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; | |
cf61fdb9 | 471 | setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); |
236dd4d1 AV |
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; | |
cf61fdb9 | 489 | clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_LSS); |
236dd4d1 AV |
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 */ | |
cf61fdb9 | 533 | out_8(&usb->fhci->regs->usb_uscom, USB_CMD_FLUSH_FIFO | EP_ZERO); |
236dd4d1 AV |
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 | ||
cf61fdb9 GMF |
553 | usb_er |= in_be16(&usb->fhci->regs->usb_usber) & |
554 | in_be16(&usb->fhci->regs->usb_usbmr); | |
236dd4d1 AV |
555 | |
556 | /* clear event bits for next time */ | |
cf61fdb9 | 557 | out_be16(&usb->fhci->regs->usb_usber, usb_er); |
236dd4d1 AV |
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; | |
cf61fdb9 | 571 | out_be16(&usb->fhci->regs->usb_usber, |
236dd4d1 AV |
572 | usb->saved_msk); |
573 | } else if (usb->port_status == FHCI_PORT_DISABLED) { | |
9525dcb3 | 574 | if (fhci_ioports_check_bus_state(fhci) == 1) |
236dd4d1 AV |
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) { | |
9525dcb3 | 601 | if (usb->port_status == FHCI_PORT_DISABLED) { |
236dd4d1 AV |
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; | |
cf61fdb9 | 609 | out_be16(&usb->fhci->regs->usb_usbmr, |
236dd4d1 AV |
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 | /* | |
af901ca1 | 625 | * Process normal completions(error or success) and clean the schedule. |
236dd4d1 AV |
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 */ | |
f467ff4c AS |
738 | if (ed->mode == FHCI_TF_ISO) { |
739 | /* Ignore the possibility of underruns */ | |
740 | urb->start_frame = ed->td_head ? ed->next_iso : | |
236dd4d1 | 741 | get_frame_num(fhci); |
f467ff4c AS |
742 | ed->next_iso = (urb->start_frame + urb->interval * |
743 | urb->number_of_packets) & 0x07ff; | |
744 | } | |
236dd4d1 AV |
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)); | |
273d2357 | 812 | /* setup stage */ |
236dd4d1 AV |
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 | ||
273d2357 | 816 | /* data stage */ |
236dd4d1 AV |
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 | } | |
273d2357 JH |
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 | ||
236dd4d1 AV |
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 | } |