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Merge remote-tracking branch 'crypto/master'
[deliverable/linux.git] / drivers / usb / renesas_usbhs / fifo.c
1 /*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 #include <linux/delay.h>
18 #include <linux/io.h>
19 #include <linux/scatterlist.h>
20 #include "common.h"
21 #include "pipe.h"
22
23 #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
24 #define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f)
25
26 #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
27
28 /*
29 * packet initialize
30 */
31 void usbhs_pkt_init(struct usbhs_pkt *pkt)
32 {
33 INIT_LIST_HEAD(&pkt->node);
34 }
35
36 /*
37 * packet control function
38 */
39 static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
40 {
41 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
42 struct device *dev = usbhs_priv_to_dev(priv);
43
44 dev_err(dev, "null handler\n");
45
46 return -EINVAL;
47 }
48
49 static const struct usbhs_pkt_handle usbhsf_null_handler = {
50 .prepare = usbhsf_null_handle,
51 .try_run = usbhsf_null_handle,
52 };
53
54 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
55 void (*done)(struct usbhs_priv *priv,
56 struct usbhs_pkt *pkt),
57 void *buf, int len, int zero, int sequence)
58 {
59 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
60 struct device *dev = usbhs_priv_to_dev(priv);
61 unsigned long flags;
62
63 if (!done) {
64 dev_err(dev, "no done function\n");
65 return;
66 }
67
68 /******************** spin lock ********************/
69 usbhs_lock(priv, flags);
70
71 if (!pipe->handler) {
72 dev_err(dev, "no handler function\n");
73 pipe->handler = &usbhsf_null_handler;
74 }
75
76 list_move_tail(&pkt->node, &pipe->list);
77
78 /*
79 * each pkt must hold own handler.
80 * because handler might be changed by its situation.
81 * dma handler -> pio handler.
82 */
83 pkt->pipe = pipe;
84 pkt->buf = buf;
85 pkt->handler = pipe->handler;
86 pkt->length = len;
87 pkt->zero = zero;
88 pkt->actual = 0;
89 pkt->done = done;
90 pkt->sequence = sequence;
91
92 usbhs_unlock(priv, flags);
93 /******************** spin unlock ******************/
94 }
95
96 static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
97 {
98 list_del_init(&pkt->node);
99 }
100
101 static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
102 {
103 if (list_empty(&pipe->list))
104 return NULL;
105
106 return list_first_entry(&pipe->list, struct usbhs_pkt, node);
107 }
108
109 static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
110 struct usbhs_fifo *fifo);
111 static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
112 struct usbhs_fifo *fifo);
113 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
114 struct usbhs_pkt *pkt);
115 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
116 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
117 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map);
118 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
119 {
120 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
121 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
122 unsigned long flags;
123
124 /******************** spin lock ********************/
125 usbhs_lock(priv, flags);
126
127 usbhs_pipe_disable(pipe);
128
129 if (!pkt)
130 pkt = __usbhsf_pkt_get(pipe);
131
132 if (pkt) {
133 struct dma_chan *chan = NULL;
134
135 if (fifo)
136 chan = usbhsf_dma_chan_get(fifo, pkt);
137 if (chan) {
138 dmaengine_terminate_all(chan);
139 usbhsf_fifo_clear(pipe, fifo);
140 usbhsf_dma_unmap(pkt);
141 }
142
143 __usbhsf_pkt_del(pkt);
144 }
145
146 if (fifo)
147 usbhsf_fifo_unselect(pipe, fifo);
148
149 usbhs_unlock(priv, flags);
150 /******************** spin unlock ******************/
151
152 return pkt;
153 }
154
155 enum {
156 USBHSF_PKT_PREPARE,
157 USBHSF_PKT_TRY_RUN,
158 USBHSF_PKT_DMA_DONE,
159 };
160
161 static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
162 {
163 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
164 struct usbhs_pkt *pkt;
165 struct device *dev = usbhs_priv_to_dev(priv);
166 int (*func)(struct usbhs_pkt *pkt, int *is_done);
167 unsigned long flags;
168 int ret = 0;
169 int is_done = 0;
170
171 /******************** spin lock ********************/
172 usbhs_lock(priv, flags);
173
174 pkt = __usbhsf_pkt_get(pipe);
175 if (!pkt)
176 goto __usbhs_pkt_handler_end;
177
178 switch (type) {
179 case USBHSF_PKT_PREPARE:
180 func = pkt->handler->prepare;
181 break;
182 case USBHSF_PKT_TRY_RUN:
183 func = pkt->handler->try_run;
184 break;
185 case USBHSF_PKT_DMA_DONE:
186 func = pkt->handler->dma_done;
187 break;
188 default:
189 dev_err(dev, "unknown pkt handler\n");
190 goto __usbhs_pkt_handler_end;
191 }
192
193 if (likely(func))
194 ret = func(pkt, &is_done);
195
196 if (is_done)
197 __usbhsf_pkt_del(pkt);
198
199 __usbhs_pkt_handler_end:
200 usbhs_unlock(priv, flags);
201 /******************** spin unlock ******************/
202
203 if (is_done) {
204 pkt->done(priv, pkt);
205 usbhs_pkt_start(pipe);
206 }
207
208 return ret;
209 }
210
211 void usbhs_pkt_start(struct usbhs_pipe *pipe)
212 {
213 usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
214 }
215
216 /*
217 * irq enable/disable function
218 */
219 #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e)
220 #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e)
221 #define usbhsf_irq_callback_ctrl(pipe, status, enable) \
222 ({ \
223 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
224 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
225 u16 status = (1 << usbhs_pipe_number(pipe)); \
226 if (!mod) \
227 return; \
228 if (enable) \
229 mod->status |= status; \
230 else \
231 mod->status &= ~status; \
232 usbhs_irq_callback_update(priv, mod); \
233 })
234
235 static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
236 {
237 /*
238 * And DCP pipe can NOT use "ready interrupt" for "send"
239 * it should use "empty" interrupt.
240 * see
241 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
242 *
243 * on the other hand, normal pipe can use "ready interrupt" for "send"
244 * even though it is single/double buffer
245 */
246 if (usbhs_pipe_is_dcp(pipe))
247 usbhsf_irq_empty_ctrl(pipe, enable);
248 else
249 usbhsf_irq_ready_ctrl(pipe, enable);
250 }
251
252 static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
253 {
254 usbhsf_irq_ready_ctrl(pipe, enable);
255 }
256
257 /*
258 * FIFO ctrl
259 */
260 static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
261 struct usbhs_fifo *fifo)
262 {
263 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
264
265 usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
266 }
267
268 static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
269 struct usbhs_fifo *fifo)
270 {
271 int timeout = 1024;
272
273 do {
274 /* The FIFO port is accessible */
275 if (usbhs_read(priv, fifo->ctr) & FRDY)
276 return 0;
277
278 udelay(10);
279 } while (timeout--);
280
281 return -EBUSY;
282 }
283
284 static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
285 struct usbhs_fifo *fifo)
286 {
287 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
288
289 if (!usbhs_pipe_is_dcp(pipe))
290 usbhsf_fifo_barrier(priv, fifo);
291
292 usbhs_write(priv, fifo->ctr, BCLR);
293 }
294
295 static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
296 struct usbhs_fifo *fifo)
297 {
298 return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
299 }
300
301 static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
302 struct usbhs_fifo *fifo)
303 {
304 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
305
306 usbhs_pipe_select_fifo(pipe, NULL);
307 usbhs_write(priv, fifo->sel, 0);
308 }
309
310 static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
311 struct usbhs_fifo *fifo,
312 int write)
313 {
314 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
315 struct device *dev = usbhs_priv_to_dev(priv);
316 int timeout = 1024;
317 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
318 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
319
320 if (usbhs_pipe_is_busy(pipe) ||
321 usbhsf_fifo_is_busy(fifo))
322 return -EBUSY;
323
324 if (usbhs_pipe_is_dcp(pipe)) {
325 base |= (1 == write) << 5; /* ISEL */
326
327 if (usbhs_mod_is_host(priv))
328 usbhs_dcp_dir_for_host(pipe, write);
329 }
330
331 /* "base" will be used below */
332 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
333 usbhs_write(priv, fifo->sel, base);
334 else
335 usbhs_write(priv, fifo->sel, base | MBW_32);
336
337 /* check ISEL and CURPIPE value */
338 while (timeout--) {
339 if (base == (mask & usbhs_read(priv, fifo->sel))) {
340 usbhs_pipe_select_fifo(pipe, fifo);
341 return 0;
342 }
343 udelay(10);
344 }
345
346 dev_err(dev, "fifo select error\n");
347
348 return -EIO;
349 }
350
351 /*
352 * DCP status stage
353 */
354 static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
355 {
356 struct usbhs_pipe *pipe = pkt->pipe;
357 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
358 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
359 struct device *dev = usbhs_priv_to_dev(priv);
360 int ret;
361
362 usbhs_pipe_disable(pipe);
363
364 ret = usbhsf_fifo_select(pipe, fifo, 1);
365 if (ret < 0) {
366 dev_err(dev, "%s() faile\n", __func__);
367 return ret;
368 }
369
370 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
371
372 usbhsf_fifo_clear(pipe, fifo);
373 usbhsf_send_terminator(pipe, fifo);
374
375 usbhsf_fifo_unselect(pipe, fifo);
376
377 usbhsf_tx_irq_ctrl(pipe, 1);
378 usbhs_pipe_enable(pipe);
379
380 return ret;
381 }
382
383 static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
384 {
385 struct usbhs_pipe *pipe = pkt->pipe;
386 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
387 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
388 struct device *dev = usbhs_priv_to_dev(priv);
389 int ret;
390
391 usbhs_pipe_disable(pipe);
392
393 ret = usbhsf_fifo_select(pipe, fifo, 0);
394 if (ret < 0) {
395 dev_err(dev, "%s() fail\n", __func__);
396 return ret;
397 }
398
399 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
400 usbhsf_fifo_clear(pipe, fifo);
401
402 usbhsf_fifo_unselect(pipe, fifo);
403
404 usbhsf_rx_irq_ctrl(pipe, 1);
405 usbhs_pipe_enable(pipe);
406
407 return ret;
408
409 }
410
411 static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
412 {
413 struct usbhs_pipe *pipe = pkt->pipe;
414
415 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
416 usbhsf_tx_irq_ctrl(pipe, 0);
417 else
418 usbhsf_rx_irq_ctrl(pipe, 0);
419
420 pkt->actual = pkt->length;
421 *is_done = 1;
422
423 return 0;
424 }
425
426 const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
427 .prepare = usbhs_dcp_dir_switch_to_write,
428 .try_run = usbhs_dcp_dir_switch_done,
429 };
430
431 const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
432 .prepare = usbhs_dcp_dir_switch_to_read,
433 .try_run = usbhs_dcp_dir_switch_done,
434 };
435
436 /*
437 * DCP data stage (push)
438 */
439 static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
440 {
441 struct usbhs_pipe *pipe = pkt->pipe;
442
443 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
444
445 /*
446 * change handler to PIO push
447 */
448 pkt->handler = &usbhs_fifo_pio_push_handler;
449
450 return pkt->handler->prepare(pkt, is_done);
451 }
452
453 const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
454 .prepare = usbhsf_dcp_data_stage_try_push,
455 };
456
457 /*
458 * DCP data stage (pop)
459 */
460 static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
461 int *is_done)
462 {
463 struct usbhs_pipe *pipe = pkt->pipe;
464 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
465 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
466
467 if (usbhs_pipe_is_busy(pipe))
468 return 0;
469
470 /*
471 * prepare pop for DCP should
472 * - change DCP direction,
473 * - clear fifo
474 * - DATA1
475 */
476 usbhs_pipe_disable(pipe);
477
478 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
479
480 usbhsf_fifo_select(pipe, fifo, 0);
481 usbhsf_fifo_clear(pipe, fifo);
482 usbhsf_fifo_unselect(pipe, fifo);
483
484 /*
485 * change handler to PIO pop
486 */
487 pkt->handler = &usbhs_fifo_pio_pop_handler;
488
489 return pkt->handler->prepare(pkt, is_done);
490 }
491
492 const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
493 .prepare = usbhsf_dcp_data_stage_prepare_pop,
494 };
495
496 /*
497 * PIO push handler
498 */
499 static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
500 {
501 struct usbhs_pipe *pipe = pkt->pipe;
502 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
503 struct device *dev = usbhs_priv_to_dev(priv);
504 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
505 void __iomem *addr = priv->base + fifo->port;
506 u8 *buf;
507 int maxp = usbhs_pipe_get_maxpacket(pipe);
508 int total_len;
509 int i, ret, len;
510 int is_short;
511
512 usbhs_pipe_data_sequence(pipe, pkt->sequence);
513 pkt->sequence = -1; /* -1 sequence will be ignored */
514
515 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
516
517 ret = usbhsf_fifo_select(pipe, fifo, 1);
518 if (ret < 0)
519 return 0;
520
521 ret = usbhs_pipe_is_accessible(pipe);
522 if (ret < 0) {
523 /* inaccessible pipe is not an error */
524 ret = 0;
525 goto usbhs_fifo_write_busy;
526 }
527
528 ret = usbhsf_fifo_barrier(priv, fifo);
529 if (ret < 0)
530 goto usbhs_fifo_write_busy;
531
532 buf = pkt->buf + pkt->actual;
533 len = pkt->length - pkt->actual;
534 len = min(len, maxp);
535 total_len = len;
536 is_short = total_len < maxp;
537
538 /*
539 * FIXME
540 *
541 * 32-bit access only
542 */
543 if (len >= 4 && !((unsigned long)buf & 0x03)) {
544 iowrite32_rep(addr, buf, len / 4);
545 len %= 4;
546 buf += total_len - len;
547 }
548
549 /* the rest operation */
550 for (i = 0; i < len; i++)
551 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
552
553 /*
554 * variable update
555 */
556 pkt->actual += total_len;
557
558 if (pkt->actual < pkt->length)
559 *is_done = 0; /* there are remainder data */
560 else if (is_short)
561 *is_done = 1; /* short packet */
562 else
563 *is_done = !pkt->zero; /* send zero packet ? */
564
565 /*
566 * pipe/irq handling
567 */
568 if (is_short)
569 usbhsf_send_terminator(pipe, fifo);
570
571 usbhsf_tx_irq_ctrl(pipe, !*is_done);
572 usbhs_pipe_running(pipe, !*is_done);
573 usbhs_pipe_enable(pipe);
574
575 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
576 usbhs_pipe_number(pipe),
577 pkt->length, pkt->actual, *is_done, pkt->zero);
578
579 usbhsf_fifo_unselect(pipe, fifo);
580
581 return 0;
582
583 usbhs_fifo_write_busy:
584 usbhsf_fifo_unselect(pipe, fifo);
585
586 /*
587 * pipe is busy.
588 * retry in interrupt
589 */
590 usbhsf_tx_irq_ctrl(pipe, 1);
591 usbhs_pipe_running(pipe, 1);
592
593 return ret;
594 }
595
596 static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done)
597 {
598 if (usbhs_pipe_is_running(pkt->pipe))
599 return 0;
600
601 return usbhsf_pio_try_push(pkt, is_done);
602 }
603
604 const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
605 .prepare = usbhsf_pio_prepare_push,
606 .try_run = usbhsf_pio_try_push,
607 };
608
609 /*
610 * PIO pop handler
611 */
612 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
613 {
614 struct usbhs_pipe *pipe = pkt->pipe;
615 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
616 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
617
618 if (usbhs_pipe_is_busy(pipe))
619 return 0;
620
621 if (usbhs_pipe_is_running(pipe))
622 return 0;
623
624 /*
625 * pipe enable to prepare packet receive
626 */
627 usbhs_pipe_data_sequence(pipe, pkt->sequence);
628 pkt->sequence = -1; /* -1 sequence will be ignored */
629
630 if (usbhs_pipe_is_dcp(pipe))
631 usbhsf_fifo_clear(pipe, fifo);
632
633 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
634 usbhs_pipe_enable(pipe);
635 usbhs_pipe_running(pipe, 1);
636 usbhsf_rx_irq_ctrl(pipe, 1);
637
638 return 0;
639 }
640
641 static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
642 {
643 struct usbhs_pipe *pipe = pkt->pipe;
644 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
645 struct device *dev = usbhs_priv_to_dev(priv);
646 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
647 void __iomem *addr = priv->base + fifo->port;
648 u8 *buf;
649 u32 data = 0;
650 int maxp = usbhs_pipe_get_maxpacket(pipe);
651 int rcv_len, len;
652 int i, ret;
653 int total_len = 0;
654
655 ret = usbhsf_fifo_select(pipe, fifo, 0);
656 if (ret < 0)
657 return 0;
658
659 ret = usbhsf_fifo_barrier(priv, fifo);
660 if (ret < 0)
661 goto usbhs_fifo_read_busy;
662
663 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
664
665 buf = pkt->buf + pkt->actual;
666 len = pkt->length - pkt->actual;
667 len = min(len, rcv_len);
668 total_len = len;
669
670 /*
671 * update actual length first here to decide disable pipe.
672 * if this pipe keeps BUF status and all data were popped,
673 * then, next interrupt/token will be issued again
674 */
675 pkt->actual += total_len;
676
677 if ((pkt->actual == pkt->length) || /* receive all data */
678 (total_len < maxp)) { /* short packet */
679 *is_done = 1;
680 usbhsf_rx_irq_ctrl(pipe, 0);
681 usbhs_pipe_running(pipe, 0);
682 /*
683 * If function mode, since this controller is possible to enter
684 * Control Write status stage at this timing, this driver
685 * should not disable the pipe. If such a case happens, this
686 * controller is not able to complete the status stage.
687 */
688 if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe))
689 usbhs_pipe_disable(pipe); /* disable pipe first */
690 }
691
692 /*
693 * Buffer clear if Zero-Length packet
694 *
695 * see
696 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
697 */
698 if (0 == rcv_len) {
699 pkt->zero = 1;
700 usbhsf_fifo_clear(pipe, fifo);
701 goto usbhs_fifo_read_end;
702 }
703
704 /*
705 * FIXME
706 *
707 * 32-bit access only
708 */
709 if (len >= 4 && !((unsigned long)buf & 0x03)) {
710 ioread32_rep(addr, buf, len / 4);
711 len %= 4;
712 buf += total_len - len;
713 }
714
715 /* the rest operation */
716 for (i = 0; i < len; i++) {
717 if (!(i & 0x03))
718 data = ioread32(addr);
719
720 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
721 }
722
723 usbhs_fifo_read_end:
724 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
725 usbhs_pipe_number(pipe),
726 pkt->length, pkt->actual, *is_done, pkt->zero);
727
728 usbhs_fifo_read_busy:
729 usbhsf_fifo_unselect(pipe, fifo);
730
731 return ret;
732 }
733
734 const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
735 .prepare = usbhsf_prepare_pop,
736 .try_run = usbhsf_pio_try_pop,
737 };
738
739 /*
740 * DCP ctrol statge handler
741 */
742 static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
743 {
744 usbhs_dcp_control_transfer_done(pkt->pipe);
745
746 *is_done = 1;
747
748 return 0;
749 }
750
751 const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
752 .prepare = usbhsf_ctrl_stage_end,
753 .try_run = usbhsf_ctrl_stage_end,
754 };
755
756 /*
757 * DMA fifo functions
758 */
759 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
760 struct usbhs_pkt *pkt)
761 {
762 if (&usbhs_fifo_dma_push_handler == pkt->handler)
763 return fifo->tx_chan;
764
765 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
766 return fifo->rx_chan;
767
768 return NULL;
769 }
770
771 static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
772 struct usbhs_pkt *pkt)
773 {
774 struct usbhs_fifo *fifo;
775 int i;
776
777 usbhs_for_each_dfifo(priv, fifo, i) {
778 if (usbhsf_dma_chan_get(fifo, pkt) &&
779 !usbhsf_fifo_is_busy(fifo))
780 return fifo;
781 }
782
783 return NULL;
784 }
785
786 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
787 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
788 static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
789 struct usbhs_fifo *fifo,
790 u16 dreqe)
791 {
792 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
793
794 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
795 }
796
797 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
798 {
799 struct usbhs_pipe *pipe = pkt->pipe;
800 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
801 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
802 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
803 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
804
805 return info->dma_map_ctrl(chan->device->dev, pkt, map);
806 }
807
808 static void usbhsf_dma_complete(void *arg);
809 static void xfer_work(struct work_struct *work)
810 {
811 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
812 struct usbhs_pipe *pipe = pkt->pipe;
813 struct usbhs_fifo *fifo;
814 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
815 struct dma_async_tx_descriptor *desc;
816 struct dma_chan *chan;
817 struct device *dev = usbhs_priv_to_dev(priv);
818 enum dma_transfer_direction dir;
819 unsigned long flags;
820
821 usbhs_lock(priv, flags);
822 fifo = usbhs_pipe_to_fifo(pipe);
823 if (!fifo)
824 goto xfer_work_end;
825
826 chan = usbhsf_dma_chan_get(fifo, pkt);
827 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
828
829 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
830 pkt->trans, dir,
831 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
832 if (!desc)
833 goto xfer_work_end;
834
835 desc->callback = usbhsf_dma_complete;
836 desc->callback_param = pipe;
837
838 pkt->cookie = dmaengine_submit(desc);
839 if (pkt->cookie < 0) {
840 dev_err(dev, "Failed to submit dma descriptor\n");
841 goto xfer_work_end;
842 }
843
844 dev_dbg(dev, " %s %d (%d/ %d)\n",
845 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
846
847 usbhs_pipe_running(pipe, 1);
848 usbhsf_dma_start(pipe, fifo);
849 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
850 dma_async_issue_pending(chan);
851 usbhs_pipe_enable(pipe);
852
853 xfer_work_end:
854 usbhs_unlock(priv, flags);
855 }
856
857 /*
858 * DMA push handler
859 */
860 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
861 {
862 struct usbhs_pipe *pipe = pkt->pipe;
863 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
864 struct usbhs_fifo *fifo;
865 int len = pkt->length - pkt->actual;
866 int ret;
867 uintptr_t align_mask;
868
869 if (usbhs_pipe_is_busy(pipe))
870 return 0;
871
872 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
873 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
874 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
875 goto usbhsf_pio_prepare_push;
876
877 /* check data length if this driver don't use USB-DMAC */
878 if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7)
879 goto usbhsf_pio_prepare_push;
880
881 /* check buffer alignment */
882 align_mask = usbhs_get_dparam(priv, has_usb_dmac) ?
883 USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7;
884 if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask)
885 goto usbhsf_pio_prepare_push;
886
887 /* return at this time if the pipe is running */
888 if (usbhs_pipe_is_running(pipe))
889 return 0;
890
891 /* get enable DMA fifo */
892 fifo = usbhsf_get_dma_fifo(priv, pkt);
893 if (!fifo)
894 goto usbhsf_pio_prepare_push;
895
896 ret = usbhsf_fifo_select(pipe, fifo, 0);
897 if (ret < 0)
898 goto usbhsf_pio_prepare_push;
899
900 if (usbhsf_dma_map(pkt) < 0)
901 goto usbhsf_pio_prepare_push_unselect;
902
903 pkt->trans = len;
904
905 usbhsf_tx_irq_ctrl(pipe, 0);
906 INIT_WORK(&pkt->work, xfer_work);
907 schedule_work(&pkt->work);
908
909 return 0;
910
911 usbhsf_pio_prepare_push_unselect:
912 usbhsf_fifo_unselect(pipe, fifo);
913 usbhsf_pio_prepare_push:
914 /*
915 * change handler to PIO
916 */
917 pkt->handler = &usbhs_fifo_pio_push_handler;
918
919 return pkt->handler->prepare(pkt, is_done);
920 }
921
922 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
923 {
924 struct usbhs_pipe *pipe = pkt->pipe;
925 int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe);
926
927 pkt->actual += pkt->trans;
928
929 if (pkt->actual < pkt->length)
930 *is_done = 0; /* there are remainder data */
931 else if (is_short)
932 *is_done = 1; /* short packet */
933 else
934 *is_done = !pkt->zero; /* send zero packet? */
935
936 usbhs_pipe_running(pipe, !*is_done);
937
938 usbhsf_dma_stop(pipe, pipe->fifo);
939 usbhsf_dma_unmap(pkt);
940 usbhsf_fifo_unselect(pipe, pipe->fifo);
941
942 if (!*is_done) {
943 /* change handler to PIO */
944 pkt->handler = &usbhs_fifo_pio_push_handler;
945 return pkt->handler->try_run(pkt, is_done);
946 }
947
948 return 0;
949 }
950
951 const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
952 .prepare = usbhsf_dma_prepare_push,
953 .dma_done = usbhsf_dma_push_done,
954 };
955
956 /*
957 * DMA pop handler
958 */
959
960 static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt,
961 int *is_done)
962 {
963 return usbhsf_prepare_pop(pkt, is_done);
964 }
965
966 static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt,
967 int *is_done)
968 {
969 struct usbhs_pipe *pipe = pkt->pipe;
970 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
971 struct usbhs_fifo *fifo;
972 int ret;
973
974 if (usbhs_pipe_is_busy(pipe))
975 return 0;
976
977 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
978 if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) ||
979 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
980 goto usbhsf_pio_prepare_pop;
981
982 fifo = usbhsf_get_dma_fifo(priv, pkt);
983 if (!fifo)
984 goto usbhsf_pio_prepare_pop;
985
986 if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1))
987 goto usbhsf_pio_prepare_pop;
988
989 usbhs_pipe_config_change_bfre(pipe, 1);
990
991 ret = usbhsf_fifo_select(pipe, fifo, 0);
992 if (ret < 0)
993 goto usbhsf_pio_prepare_pop;
994
995 if (usbhsf_dma_map(pkt) < 0)
996 goto usbhsf_pio_prepare_pop_unselect;
997
998 /* DMA */
999
1000 /*
1001 * usbhs_fifo_dma_pop_handler :: prepare
1002 * enabled irq to come here.
1003 * but it is no longer needed for DMA. disable it.
1004 */
1005 usbhsf_rx_irq_ctrl(pipe, 0);
1006
1007 pkt->trans = pkt->length;
1008
1009 INIT_WORK(&pkt->work, xfer_work);
1010 schedule_work(&pkt->work);
1011
1012 return 0;
1013
1014 usbhsf_pio_prepare_pop_unselect:
1015 usbhsf_fifo_unselect(pipe, fifo);
1016 usbhsf_pio_prepare_pop:
1017
1018 /*
1019 * change handler to PIO
1020 */
1021 pkt->handler = &usbhs_fifo_pio_pop_handler;
1022 usbhs_pipe_config_change_bfre(pipe, 0);
1023
1024 return pkt->handler->prepare(pkt, is_done);
1025 }
1026
1027 static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
1028 {
1029 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1030
1031 if (usbhs_get_dparam(priv, has_usb_dmac))
1032 return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done);
1033 else
1034 return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done);
1035 }
1036
1037 static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1038 {
1039 struct usbhs_pipe *pipe = pkt->pipe;
1040 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1041 struct usbhs_fifo *fifo;
1042 int len, ret;
1043
1044 if (usbhs_pipe_is_busy(pipe))
1045 return 0;
1046
1047 if (usbhs_pipe_is_dcp(pipe))
1048 goto usbhsf_pio_prepare_pop;
1049
1050 /* get enable DMA fifo */
1051 fifo = usbhsf_get_dma_fifo(priv, pkt);
1052 if (!fifo)
1053 goto usbhsf_pio_prepare_pop;
1054
1055 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
1056 goto usbhsf_pio_prepare_pop;
1057
1058 ret = usbhsf_fifo_select(pipe, fifo, 0);
1059 if (ret < 0)
1060 goto usbhsf_pio_prepare_pop;
1061
1062 /* use PIO if packet is less than pio_dma_border */
1063 len = usbhsf_fifo_rcv_len(priv, fifo);
1064 len = min(pkt->length - pkt->actual, len);
1065 if (len & 0x7) /* 8byte alignment */
1066 goto usbhsf_pio_prepare_pop_unselect;
1067
1068 if (len < usbhs_get_dparam(priv, pio_dma_border))
1069 goto usbhsf_pio_prepare_pop_unselect;
1070
1071 ret = usbhsf_fifo_barrier(priv, fifo);
1072 if (ret < 0)
1073 goto usbhsf_pio_prepare_pop_unselect;
1074
1075 if (usbhsf_dma_map(pkt) < 0)
1076 goto usbhsf_pio_prepare_pop_unselect;
1077
1078 /* DMA */
1079
1080 /*
1081 * usbhs_fifo_dma_pop_handler :: prepare
1082 * enabled irq to come here.
1083 * but it is no longer needed for DMA. disable it.
1084 */
1085 usbhsf_rx_irq_ctrl(pipe, 0);
1086
1087 pkt->trans = len;
1088
1089 INIT_WORK(&pkt->work, xfer_work);
1090 schedule_work(&pkt->work);
1091
1092 return 0;
1093
1094 usbhsf_pio_prepare_pop_unselect:
1095 usbhsf_fifo_unselect(pipe, fifo);
1096 usbhsf_pio_prepare_pop:
1097
1098 /*
1099 * change handler to PIO
1100 */
1101 pkt->handler = &usbhs_fifo_pio_pop_handler;
1102
1103 return pkt->handler->try_run(pkt, is_done);
1104 }
1105
1106 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
1107 {
1108 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1109
1110 BUG_ON(usbhs_get_dparam(priv, has_usb_dmac));
1111
1112 return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done);
1113 }
1114
1115 static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1116 {
1117 struct usbhs_pipe *pipe = pkt->pipe;
1118 int maxp = usbhs_pipe_get_maxpacket(pipe);
1119
1120 usbhsf_dma_stop(pipe, pipe->fifo);
1121 usbhsf_dma_unmap(pkt);
1122 usbhsf_fifo_unselect(pipe, pipe->fifo);
1123
1124 pkt->actual += pkt->trans;
1125
1126 if ((pkt->actual == pkt->length) || /* receive all data */
1127 (pkt->trans < maxp)) { /* short packet */
1128 *is_done = 1;
1129 usbhs_pipe_running(pipe, 0);
1130 } else {
1131 /* re-enable */
1132 usbhs_pipe_running(pipe, 0);
1133 usbhsf_prepare_pop(pkt, is_done);
1134 }
1135
1136 return 0;
1137 }
1138
1139 static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt,
1140 struct dma_chan *chan, int dtln)
1141 {
1142 struct usbhs_pipe *pipe = pkt->pipe;
1143 struct dma_tx_state state;
1144 size_t received_size;
1145 int maxp = usbhs_pipe_get_maxpacket(pipe);
1146
1147 dmaengine_tx_status(chan, pkt->cookie, &state);
1148 received_size = pkt->length - state.residue;
1149
1150 if (dtln) {
1151 received_size -= USBHS_USB_DMAC_XFER_SIZE;
1152 received_size &= ~(maxp - 1);
1153 received_size += dtln;
1154 }
1155
1156 return received_size;
1157 }
1158
1159 static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt,
1160 int *is_done)
1161 {
1162 struct usbhs_pipe *pipe = pkt->pipe;
1163 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1164 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
1165 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
1166 int rcv_len;
1167
1168 /*
1169 * Since the driver disables rx_irq in DMA mode, the interrupt handler
1170 * cannot the BRDYSTS. So, the function clears it here because the
1171 * driver may use PIO mode next time.
1172 */
1173 usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe));
1174
1175 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
1176 usbhsf_fifo_clear(pipe, fifo);
1177 pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len);
1178
1179 usbhsf_dma_stop(pipe, fifo);
1180 usbhsf_dma_unmap(pkt);
1181 usbhsf_fifo_unselect(pipe, pipe->fifo);
1182
1183 /* The driver can assume the rx transaction is always "done" */
1184 *is_done = 1;
1185
1186 return 0;
1187 }
1188
1189 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
1190 {
1191 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1192
1193 if (usbhs_get_dparam(priv, has_usb_dmac))
1194 return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done);
1195 else
1196 return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done);
1197 }
1198
1199 const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
1200 .prepare = usbhsf_dma_prepare_pop,
1201 .try_run = usbhsf_dma_try_pop,
1202 .dma_done = usbhsf_dma_pop_done
1203 };
1204
1205 /*
1206 * DMA setting
1207 */
1208 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
1209 {
1210 struct sh_dmae_slave *slave = param;
1211
1212 /*
1213 * FIXME
1214 *
1215 * usbhs doesn't recognize id = 0 as valid DMA
1216 */
1217 if (0 == slave->shdma_slave.slave_id)
1218 return false;
1219
1220 chan->private = slave;
1221
1222 return true;
1223 }
1224
1225 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1226 {
1227 if (fifo->tx_chan)
1228 dma_release_channel(fifo->tx_chan);
1229 if (fifo->rx_chan)
1230 dma_release_channel(fifo->rx_chan);
1231
1232 fifo->tx_chan = NULL;
1233 fifo->rx_chan = NULL;
1234 }
1235
1236 static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo)
1237 {
1238 dma_cap_mask_t mask;
1239
1240 dma_cap_zero(mask);
1241 dma_cap_set(DMA_SLAVE, mask);
1242 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1243 &fifo->tx_slave);
1244
1245 dma_cap_zero(mask);
1246 dma_cap_set(DMA_SLAVE, mask);
1247 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1248 &fifo->rx_slave);
1249 }
1250
1251 static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo,
1252 int channel)
1253 {
1254 char name[16];
1255
1256 /*
1257 * To avoid complex handing for DnFIFOs, the driver uses each
1258 * DnFIFO as TX or RX direction (not bi-direction).
1259 * So, the driver uses odd channels for TX, even channels for RX.
1260 */
1261 snprintf(name, sizeof(name), "ch%d", channel);
1262 if (channel & 1) {
1263 fifo->tx_chan = dma_request_slave_channel_reason(dev, name);
1264 if (IS_ERR(fifo->tx_chan))
1265 fifo->tx_chan = NULL;
1266 } else {
1267 fifo->rx_chan = dma_request_slave_channel_reason(dev, name);
1268 if (IS_ERR(fifo->rx_chan))
1269 fifo->rx_chan = NULL;
1270 }
1271 }
1272
1273 static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo,
1274 int channel)
1275 {
1276 struct device *dev = usbhs_priv_to_dev(priv);
1277
1278 if (dev->of_node)
1279 usbhsf_dma_init_dt(dev, fifo, channel);
1280 else
1281 usbhsf_dma_init_pdev(fifo);
1282
1283 if (fifo->tx_chan || fifo->rx_chan)
1284 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1285 fifo->name,
1286 fifo->tx_chan ? "[TX]" : " ",
1287 fifo->rx_chan ? "[RX]" : " ");
1288 }
1289
1290 /*
1291 * irq functions
1292 */
1293 static int usbhsf_irq_empty(struct usbhs_priv *priv,
1294 struct usbhs_irq_state *irq_state)
1295 {
1296 struct usbhs_pipe *pipe;
1297 struct device *dev = usbhs_priv_to_dev(priv);
1298 int i, ret;
1299
1300 if (!irq_state->bempsts) {
1301 dev_err(dev, "debug %s !!\n", __func__);
1302 return -EIO;
1303 }
1304
1305 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1306
1307 /*
1308 * search interrupted "pipe"
1309 * not "uep".
1310 */
1311 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1312 if (!(irq_state->bempsts & (1 << i)))
1313 continue;
1314
1315 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1316 if (ret < 0)
1317 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1318 }
1319
1320 return 0;
1321 }
1322
1323 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1324 struct usbhs_irq_state *irq_state)
1325 {
1326 struct usbhs_pipe *pipe;
1327 struct device *dev = usbhs_priv_to_dev(priv);
1328 int i, ret;
1329
1330 if (!irq_state->brdysts) {
1331 dev_err(dev, "debug %s !!\n", __func__);
1332 return -EIO;
1333 }
1334
1335 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1336
1337 /*
1338 * search interrupted "pipe"
1339 * not "uep".
1340 */
1341 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1342 if (!(irq_state->brdysts & (1 << i)))
1343 continue;
1344
1345 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1346 if (ret < 0)
1347 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1348 }
1349
1350 return 0;
1351 }
1352
1353 static void usbhsf_dma_complete(void *arg)
1354 {
1355 struct usbhs_pipe *pipe = arg;
1356 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1357 struct device *dev = usbhs_priv_to_dev(priv);
1358 int ret;
1359
1360 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1361 if (ret < 0)
1362 dev_err(dev, "dma_complete run_error %d : %d\n",
1363 usbhs_pipe_number(pipe), ret);
1364 }
1365
1366 void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe)
1367 {
1368 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1369 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
1370
1371 /* clear DCP FIFO of transmission */
1372 if (usbhsf_fifo_select(pipe, fifo, 1) < 0)
1373 return;
1374 usbhsf_fifo_clear(pipe, fifo);
1375 usbhsf_fifo_unselect(pipe, fifo);
1376
1377 /* clear DCP FIFO of reception */
1378 if (usbhsf_fifo_select(pipe, fifo, 0) < 0)
1379 return;
1380 usbhsf_fifo_clear(pipe, fifo);
1381 usbhsf_fifo_unselect(pipe, fifo);
1382 }
1383
1384 /*
1385 * fifo init
1386 */
1387 void usbhs_fifo_init(struct usbhs_priv *priv)
1388 {
1389 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1390 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1391 struct usbhs_fifo *dfifo;
1392 int i;
1393
1394 mod->irq_empty = usbhsf_irq_empty;
1395 mod->irq_ready = usbhsf_irq_ready;
1396 mod->irq_bempsts = 0;
1397 mod->irq_brdysts = 0;
1398
1399 cfifo->pipe = NULL;
1400 usbhs_for_each_dfifo(priv, dfifo, i)
1401 dfifo->pipe = NULL;
1402 }
1403
1404 void usbhs_fifo_quit(struct usbhs_priv *priv)
1405 {
1406 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1407
1408 mod->irq_empty = NULL;
1409 mod->irq_ready = NULL;
1410 mod->irq_bempsts = 0;
1411 mod->irq_brdysts = 0;
1412 }
1413
1414 #define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \
1415 do { \
1416 fifo = usbhsf_get_dnfifo(priv, channel); \
1417 fifo->name = "D"#channel"FIFO"; \
1418 fifo->port = fifo_port; \
1419 fifo->sel = D##channel##FIFOSEL; \
1420 fifo->ctr = D##channel##FIFOCTR; \
1421 fifo->tx_slave.shdma_slave.slave_id = \
1422 usbhs_get_dparam(priv, d##channel##_tx_id); \
1423 fifo->rx_slave.shdma_slave.slave_id = \
1424 usbhs_get_dparam(priv, d##channel##_rx_id); \
1425 usbhsf_dma_init(priv, fifo, channel); \
1426 } while (0)
1427
1428 #define USBHS_DFIFO_INIT(priv, fifo, channel) \
1429 __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO)
1430 #define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \
1431 __USBHS_DFIFO_INIT(priv, fifo, channel, 0)
1432
1433 int usbhs_fifo_probe(struct usbhs_priv *priv)
1434 {
1435 struct usbhs_fifo *fifo;
1436
1437 /* CFIFO */
1438 fifo = usbhsf_get_cfifo(priv);
1439 fifo->name = "CFIFO";
1440 fifo->port = CFIFO;
1441 fifo->sel = CFIFOSEL;
1442 fifo->ctr = CFIFOCTR;
1443
1444 /* DFIFO */
1445 USBHS_DFIFO_INIT(priv, fifo, 0);
1446 USBHS_DFIFO_INIT(priv, fifo, 1);
1447 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2);
1448 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3);
1449
1450 return 0;
1451 }
1452
1453 void usbhs_fifo_remove(struct usbhs_priv *priv)
1454 {
1455 struct usbhs_fifo *fifo;
1456 int i;
1457
1458 usbhs_for_each_dfifo(priv, fifo, i)
1459 usbhsf_dma_quit(priv, fifo);
1460 }
Linux kernel - Deliverables
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