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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_get_d0fifo(p) (&((p)->fifo_info.d0fifo))
25#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo))
26
27#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
28
29/*
30 * packet initialize
31 */
32void usbhs_pkt_init(struct usbhs_pkt *pkt)
33{
34 pkt->dma = DMA_ADDR_INVALID;
35 INIT_LIST_HEAD(&pkt->node);
36}
37
38/*
39 * packet control function
40 */
41static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
42{
43 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
44 struct device *dev = usbhs_priv_to_dev(priv);
45
46 dev_err(dev, "null handler\n");
47
48 return -EINVAL;
49}
50
51static struct usbhs_pkt_handle usbhsf_null_handler = {
52 .prepare = usbhsf_null_handle,
53 .try_run = usbhsf_null_handle,
54};
55
56void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
57 struct usbhs_pkt_handle *handler,
58 void *buf, int len, int zero)
59{
60 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
61 struct device *dev = usbhs_priv_to_dev(priv);
62 unsigned long flags;
63
64 /******************** spin lock ********************/
65 usbhs_lock(priv, flags);
66
67 if (!handler) {
68 dev_err(dev, "no handler function\n");
69 handler = &usbhsf_null_handler;
70 }
71
72 list_del_init(&pkt->node);
73 list_add_tail(&pkt->node, &pipe->list);
74
75 pkt->pipe = pipe;
76 pkt->buf = buf;
77 pkt->handler = handler;
78 pkt->length = len;
79 pkt->zero = zero;
80 pkt->actual = 0;
81
82 usbhs_unlock(priv, flags);
83 /******************** spin unlock ******************/
84
85 usbhs_pkt_start(pipe);
86}
87
88static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
89{
90 list_del_init(&pkt->node);
91}
92
93static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
94{
95 if (list_empty(&pipe->list))
96 return NULL;
97
98 return list_entry(pipe->list.next, struct usbhs_pkt, node);
99}
100
101struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
102{
103 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
104 unsigned long flags;
105
106 /******************** spin lock ********************/
107 usbhs_lock(priv, flags);
108
109 if (!pkt)
110 pkt = __usbhsf_pkt_get(pipe);
111
112 if (pkt)
113 __usbhsf_pkt_del(pkt);
114
115 usbhs_unlock(priv, flags);
116 /******************** spin unlock ******************/
117
118 return pkt;
119}
120
121int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type)
122{
123 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
124 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
125 struct usbhs_pkt *pkt;
126 struct device *dev = usbhs_priv_to_dev(priv);
127 int (*func)(struct usbhs_pkt *pkt, int *is_done);
128 unsigned long flags;
129 int ret = 0;
130 int is_done = 0;
131
132 /******************** spin lock ********************/
133 usbhs_lock(priv, flags);
134
135 pkt = __usbhsf_pkt_get(pipe);
136 if (!pkt)
137 goto __usbhs_pkt_handler_end;
138
139 switch (type) {
140 case USBHSF_PKT_PREPARE:
141 func = pkt->handler->prepare;
142 break;
143 case USBHSF_PKT_TRY_RUN:
144 func = pkt->handler->try_run;
145 break;
146 case USBHSF_PKT_DMA_DONE:
147 func = pkt->handler->dma_done;
148 break;
149 default:
150 dev_err(dev, "unknown pkt hander\n");
151 goto __usbhs_pkt_handler_end;
152 }
153
154 ret = func(pkt, &is_done);
155
156 if (is_done)
157 __usbhsf_pkt_del(pkt);
158
159__usbhs_pkt_handler_end:
160 usbhs_unlock(priv, flags);
161 /******************** spin unlock ******************/
162
163 if (is_done) {
164 info->done(pkt);
165 usbhs_pkt_start(pipe);
166 }
167
168 return ret;
169}
170
171/*
172 * irq enable/disable function
173 */
174#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e)
175#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e)
176#define usbhsf_irq_callback_ctrl(pipe, status, enable) \
177 ({ \
178 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
179 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
180 u16 status = (1 << usbhs_pipe_number(pipe)); \
181 if (!mod) \
182 return; \
183 if (enable) \
184 mod->irq_##status |= status; \
185 else \
186 mod->irq_##status &= ~status; \
187 usbhs_irq_callback_update(priv, mod); \
188 })
189
190static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
191{
192 /*
193 * And DCP pipe can NOT use "ready interrupt" for "send"
194 * it should use "empty" interrupt.
195 * see
196 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
197 *
198 * on the other hand, normal pipe can use "ready interrupt" for "send"
199 * even though it is single/double buffer
200 */
201 if (usbhs_pipe_is_dcp(pipe))
202 usbhsf_irq_empty_ctrl(pipe, enable);
203 else
204 usbhsf_irq_ready_ctrl(pipe, enable);
205}
206
207static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
208{
209 usbhsf_irq_ready_ctrl(pipe, enable);
210}
211
212/*
213 * FIFO ctrl
214 */
215static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
216 struct usbhs_fifo *fifo)
217{
218 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
219
220 usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
221}
222
223static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
224 struct usbhs_fifo *fifo)
225{
226 int timeout = 1024;
227
228 do {
229 /* The FIFO port is accessible */
230 if (usbhs_read(priv, fifo->ctr) & FRDY)
231 return 0;
232
233 udelay(10);
234 } while (timeout--);
235
236 return -EBUSY;
237}
238
239static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
240 struct usbhs_fifo *fifo)
241{
242 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
243
244 if (!usbhs_pipe_is_dcp(pipe))
245 usbhsf_fifo_barrier(priv, fifo);
246
247 usbhs_write(priv, fifo->ctr, BCLR);
248}
249
250static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
251 struct usbhs_fifo *fifo)
252{
253 return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
254}
255
256static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
257 struct usbhs_fifo *fifo)
258{
259 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
260
261 usbhs_pipe_select_fifo(pipe, NULL);
262 usbhs_write(priv, fifo->sel, 0);
263}
264
265static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
266 struct usbhs_fifo *fifo,
267 int write)
268{
269 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
270 struct device *dev = usbhs_priv_to_dev(priv);
271 int timeout = 1024;
272 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
273 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
274
275 if (usbhs_pipe_is_busy(pipe) ||
276 usbhsf_fifo_is_busy(fifo))
277 return -EBUSY;
278
279 if (usbhs_pipe_is_dcp(pipe))
280 base |= (1 == write) << 5; /* ISEL */
281
282 /* "base" will be used below */
283 usbhs_write(priv, fifo->sel, base | MBW_32);
284
285 /* check ISEL and CURPIPE value */
286 while (timeout--) {
287 if (base == (mask & usbhs_read(priv, fifo->sel))) {
288 usbhs_pipe_select_fifo(pipe, fifo);
289 return 0;
290 }
291 udelay(10);
292 }
293
294 dev_err(dev, "fifo select error\n");
295
296 return -EIO;
297}
298
299/*
300 * PIO push handler
301 */
302static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
303{
304 struct usbhs_pipe *pipe = pkt->pipe;
305 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
306 struct device *dev = usbhs_priv_to_dev(priv);
307 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
308 void __iomem *addr = priv->base + fifo->port;
309 u8 *buf;
310 int maxp = usbhs_pipe_get_maxpacket(pipe);
311 int total_len;
312 int i, ret, len;
313 int is_short;
314
315 ret = usbhsf_fifo_select(pipe, fifo, 1);
316 if (ret < 0)
317 return 0;
318
319 ret = usbhs_pipe_is_accessible(pipe);
320 if (ret < 0) {
321 /* inaccessible pipe is not an error */
322 ret = 0;
323 goto usbhs_fifo_write_busy;
324 }
325
326 ret = usbhsf_fifo_barrier(priv, fifo);
327 if (ret < 0)
328 goto usbhs_fifo_write_busy;
329
330 buf = pkt->buf + pkt->actual;
331 len = pkt->length - pkt->actual;
332 len = min(len, maxp);
333 total_len = len;
334 is_short = total_len < maxp;
335
336 /*
337 * FIXME
338 *
339 * 32-bit access only
340 */
341 if (len >= 4 && !((unsigned long)buf & 0x03)) {
342 iowrite32_rep(addr, buf, len / 4);
343 len %= 4;
344 buf += total_len - len;
345 }
346
347 /* the rest operation */
348 for (i = 0; i < len; i++)
349 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
350
351 /*
352 * variable update
353 */
354 pkt->actual += total_len;
355
356 if (pkt->actual < pkt->length)
357 *is_done = 0; /* there are remainder data */
358 else if (is_short)
359 *is_done = 1; /* short packet */
360 else
361 *is_done = !pkt->zero; /* send zero packet ? */
362
363 /*
364 * pipe/irq handling
365 */
366 if (is_short)
367 usbhsf_send_terminator(pipe, fifo);
368
369 usbhsf_tx_irq_ctrl(pipe, !*is_done);
370 usbhs_pipe_enable(pipe);
371
372 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
373 usbhs_pipe_number(pipe),
374 pkt->length, pkt->actual, *is_done, pkt->zero);
375
376 /*
377 * Transmission end
378 */
379 if (*is_done) {
380 if (usbhs_pipe_is_dcp(pipe))
381 usbhs_dcp_control_transfer_done(pipe);
382 }
383
384 usbhsf_fifo_unselect(pipe, fifo);
385
386 return 0;
387
388usbhs_fifo_write_busy:
389 usbhsf_fifo_unselect(pipe, fifo);
390
391 /*
392 * pipe is busy.
393 * retry in interrupt
394 */
395 usbhsf_tx_irq_ctrl(pipe, 1);
396
397 return ret;
398}
399
400struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
401 .prepare = usbhsf_pio_try_push,
402 .try_run = usbhsf_pio_try_push,
403};
404
405/*
406 * PIO pop handler
407 */
408static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
409{
410 struct usbhs_pipe *pipe = pkt->pipe;
411
412 if (usbhs_pipe_is_busy(pipe))
413 return 0;
414
415 /*
416 * pipe enable to prepare packet receive
417 */
418
419 usbhs_pipe_enable(pipe);
420 usbhsf_rx_irq_ctrl(pipe, 1);
421
422 return 0;
423}
424
425static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
426{
427 struct usbhs_pipe *pipe = pkt->pipe;
428 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
429 struct device *dev = usbhs_priv_to_dev(priv);
430 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
431 void __iomem *addr = priv->base + fifo->port;
432 u8 *buf;
433 u32 data = 0;
434 int maxp = usbhs_pipe_get_maxpacket(pipe);
435 int rcv_len, len;
436 int i, ret;
437 int total_len = 0;
438
439 ret = usbhsf_fifo_select(pipe, fifo, 0);
440 if (ret < 0)
441 return 0;
442
443 ret = usbhsf_fifo_barrier(priv, fifo);
444 if (ret < 0)
445 goto usbhs_fifo_read_busy;
446
447 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
448
449 buf = pkt->buf + pkt->actual;
450 len = pkt->length - pkt->actual;
451 len = min(len, rcv_len);
452 total_len = len;
453
454 /*
455 * Buffer clear if Zero-Length packet
456 *
457 * see
458 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
459 */
460 if (0 == rcv_len) {
461 usbhsf_fifo_clear(pipe, fifo);
462 goto usbhs_fifo_read_end;
463 }
464
465 /*
466 * FIXME
467 *
468 * 32-bit access only
469 */
470 if (len >= 4 && !((unsigned long)buf & 0x03)) {
471 ioread32_rep(addr, buf, len / 4);
472 len %= 4;
473 buf += total_len - len;
474 }
475
476 /* the rest operation */
477 for (i = 0; i < len; i++) {
478 if (!(i & 0x03))
479 data = ioread32(addr);
480
481 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
482 }
483
484 pkt->actual += total_len;
485
486usbhs_fifo_read_end:
487 if ((pkt->actual == pkt->length) || /* receive all data */
488 (total_len < maxp)) { /* short packet */
489 *is_done = 1;
490 usbhsf_rx_irq_ctrl(pipe, 0);
491 usbhs_pipe_disable(pipe);
492 }
493
494 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
495 usbhs_pipe_number(pipe),
496 pkt->length, pkt->actual, *is_done, pkt->zero);
497
498usbhs_fifo_read_busy:
499 usbhsf_fifo_unselect(pipe, fifo);
500
501 return ret;
502}
503
504struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
505 .prepare = usbhsf_prepare_pop,
506 .try_run = usbhsf_pio_try_pop,
507};
508
509/*
510 * DCP ctrol statge handler
511 */
512static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
513{
514 usbhs_dcp_control_transfer_done(pkt->pipe);
515
516 *is_done = 1;
517
518 return 0;
519}
520
521struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
522 .prepare = usbhsf_ctrl_stage_end,
523 .try_run = usbhsf_ctrl_stage_end,
524};
525
526/*
527 * DMA fifo functions
528 */
529static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
530 struct usbhs_pkt *pkt)
531{
532 if (&usbhs_fifo_dma_push_handler == pkt->handler)
533 return fifo->tx_chan;
534
535 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
536 return fifo->rx_chan;
537
538 return NULL;
539}
540
541static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
542 struct usbhs_pkt *pkt)
543{
544 struct usbhs_fifo *fifo;
545
546 /* DMA :: D0FIFO */
547 fifo = usbhsf_get_d0fifo(priv);
548 if (usbhsf_dma_chan_get(fifo, pkt) &&
549 !usbhsf_fifo_is_busy(fifo))
550 return fifo;
551
552 /* DMA :: D1FIFO */
553 fifo = usbhsf_get_d1fifo(priv);
554 if (usbhsf_dma_chan_get(fifo, pkt) &&
555 !usbhsf_fifo_is_busy(fifo))
556 return fifo;
557
558 return NULL;
559}
560
561#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
562#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
563static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
564 struct usbhs_fifo *fifo,
565 u16 dreqe)
566{
567 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
568
569 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
570}
571
572#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
573#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
574static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
575{
576 struct usbhs_pipe *pipe = pkt->pipe;
577 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
578 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
579
580 return info->dma_map_ctrl(pkt, map);
581}
582
583static void usbhsf_dma_complete(void *arg);
584static void usbhsf_dma_prepare_tasklet(unsigned long data)
585{
586 struct usbhs_pkt *pkt = (struct usbhs_pkt *)data;
587 struct usbhs_pipe *pipe = pkt->pipe;
588 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
589 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
590 struct scatterlist sg;
591 struct dma_async_tx_descriptor *desc;
592 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
593 struct device *dev = usbhs_priv_to_dev(priv);
594 enum dma_data_direction dir;
595 dma_cookie_t cookie;
596
597 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
598
599 sg_init_table(&sg, 1);
600 sg_set_page(&sg, virt_to_page(pkt->dma),
601 pkt->length, offset_in_page(pkt->dma));
602 sg_dma_address(&sg) = pkt->dma + pkt->actual;
603 sg_dma_len(&sg) = pkt->trans;
604
605 desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
606 DMA_PREP_INTERRUPT |
607 DMA_CTRL_ACK);
608 if (!desc)
609 return;
610
611 desc->callback = usbhsf_dma_complete;
612 desc->callback_param = pipe;
613
614 cookie = desc->tx_submit(desc);
615 if (cookie < 0) {
616 dev_err(dev, "Failed to submit dma descriptor\n");
617 return;
618 }
619
620 dev_dbg(dev, " %s %d (%d/ %d)\n",
621 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
622
623 usbhsf_dma_start(pipe, fifo);
624 dma_async_issue_pending(chan);
625}
626
627/*
628 * DMA push handler
629 */
630static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
631{
632 struct usbhs_pipe *pipe = pkt->pipe;
633 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
634 struct usbhs_fifo *fifo;
635 int len = pkt->length - pkt->actual;
636 int ret;
637
638 if (usbhs_pipe_is_busy(pipe))
639 return 0;
640
641 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
642 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
643 usbhs_pipe_is_dcp(pipe))
644 goto usbhsf_pio_prepare_push;
645
646 if (len % 4) /* 32bit alignment */
647 goto usbhsf_pio_prepare_push;
648
649 if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
650 goto usbhsf_pio_prepare_push;
651
652 /* get enable DMA fifo */
653 fifo = usbhsf_get_dma_fifo(priv, pkt);
654 if (!fifo)
655 goto usbhsf_pio_prepare_push;
656
657 if (usbhsf_dma_map(pkt) < 0)
658 goto usbhsf_pio_prepare_push;
659
660 ret = usbhsf_fifo_select(pipe, fifo, 0);
661 if (ret < 0)
662 goto usbhsf_pio_prepare_push_unmap;
663
664 pkt->trans = len;
665
666 tasklet_init(&fifo->tasklet,
667 usbhsf_dma_prepare_tasklet,
668 (unsigned long)pkt);
669
670 tasklet_schedule(&fifo->tasklet);
671
672 return 0;
673
674usbhsf_pio_prepare_push_unmap:
675 usbhsf_dma_unmap(pkt);
676usbhsf_pio_prepare_push:
677 /*
678 * change handler to PIO
679 */
680 pkt->handler = &usbhs_fifo_pio_push_handler;
681
682 return pkt->handler->prepare(pkt, is_done);
683}
684
685static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
686{
687 struct usbhs_pipe *pipe = pkt->pipe;
688
689 pkt->actual = pkt->trans;
690
691 *is_done = !pkt->zero; /* send zero packet ? */
692
693 usbhsf_dma_stop(pipe, pipe->fifo);
694 usbhsf_dma_unmap(pkt);
695 usbhsf_fifo_unselect(pipe, pipe->fifo);
696
697 return 0;
698}
699
700struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
701 .prepare = usbhsf_dma_prepare_push,
702 .dma_done = usbhsf_dma_push_done,
703};
704
705/*
706 * DMA pop handler
707 */
708static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
709{
710 struct usbhs_pipe *pipe = pkt->pipe;
711 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
712 struct usbhs_fifo *fifo;
713 int len, ret;
714
715 if (usbhs_pipe_is_busy(pipe))
716 return 0;
717
718 if (usbhs_pipe_is_dcp(pipe))
719 goto usbhsf_pio_prepare_pop;
720
721 /* get enable DMA fifo */
722 fifo = usbhsf_get_dma_fifo(priv, pkt);
723 if (!fifo)
724 goto usbhsf_pio_prepare_pop;
725
726 if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
727 goto usbhsf_pio_prepare_pop;
728
729 ret = usbhsf_fifo_select(pipe, fifo, 0);
730 if (ret < 0)
731 goto usbhsf_pio_prepare_pop;
732
733 /* use PIO if packet is less than pio_dma_border */
734 len = usbhsf_fifo_rcv_len(priv, fifo);
735 len = min(pkt->length - pkt->actual, len);
736 if (len % 4) /* 32bit alignment */
737 goto usbhsf_pio_prepare_pop_unselect;
738
739 if (len < usbhs_get_dparam(priv, pio_dma_border))
740 goto usbhsf_pio_prepare_pop_unselect;
741
742 ret = usbhsf_fifo_barrier(priv, fifo);
743 if (ret < 0)
744 goto usbhsf_pio_prepare_pop_unselect;
745
746 if (usbhsf_dma_map(pkt) < 0)
747 goto usbhsf_pio_prepare_pop_unselect;
748
749 /* DMA */
750
751 /*
752 * usbhs_fifo_dma_pop_handler :: prepare
753 * enabled irq to come here.
754 * but it is no longer needed for DMA. disable it.
755 */
756 usbhsf_rx_irq_ctrl(pipe, 0);
757
758 pkt->trans = len;
759
760 tasklet_init(&fifo->tasklet,
761 usbhsf_dma_prepare_tasklet,
762 (unsigned long)pkt);
763
764 tasklet_schedule(&fifo->tasklet);
765
766 return 0;
767
768usbhsf_pio_prepare_pop_unselect:
769 usbhsf_fifo_unselect(pipe, fifo);
770usbhsf_pio_prepare_pop:
771
772 /*
773 * change handler to PIO
774 */
775 pkt->handler = &usbhs_fifo_pio_pop_handler;
776
777 return pkt->handler->try_run(pkt, is_done);
778}
779
780static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
781{
782 struct usbhs_pipe *pipe = pkt->pipe;
783 int maxp = usbhs_pipe_get_maxpacket(pipe);
784
785 usbhsf_dma_stop(pipe, pipe->fifo);
786 usbhsf_dma_unmap(pkt);
787 usbhsf_fifo_unselect(pipe, pipe->fifo);
788
789 pkt->actual += pkt->trans;
790
791 if ((pkt->actual == pkt->length) || /* receive all data */
792 (pkt->trans < maxp)) { /* short packet */
793 *is_done = 1;
794 } else {
795 /* re-enable */
796 usbhsf_prepare_pop(pkt, is_done);
797 }
798
799 return 0;
800}
801
802struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
803 .prepare = usbhsf_prepare_pop,
804 .try_run = usbhsf_dma_try_pop,
805 .dma_done = usbhsf_dma_pop_done
806};
807
808/*
809 * DMA setting
810 */
811static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
812{
813 struct sh_dmae_slave *slave = param;
814
815 /*
816 * FIXME
817 *
818 * usbhs doesn't recognize id = 0 as valid DMA
819 */
820 if (0 == slave->slave_id)
821 return false;
822
823 chan->private = slave;
824
825 return true;
826}
827
828static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
829{
830 if (fifo->tx_chan)
831 dma_release_channel(fifo->tx_chan);
832 if (fifo->rx_chan)
833 dma_release_channel(fifo->rx_chan);
834
835 fifo->tx_chan = NULL;
836 fifo->rx_chan = NULL;
837}
838
839static void usbhsf_dma_init(struct usbhs_priv *priv,
840 struct usbhs_fifo *fifo)
841{
842 struct device *dev = usbhs_priv_to_dev(priv);
843 dma_cap_mask_t mask;
844
845 dma_cap_zero(mask);
846 dma_cap_set(DMA_SLAVE, mask);
847 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
848 &fifo->tx_slave);
849
850 dma_cap_zero(mask);
851 dma_cap_set(DMA_SLAVE, mask);
852 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
853 &fifo->rx_slave);
854
855 if (fifo->tx_chan || fifo->rx_chan)
856 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
857 fifo->name,
858 fifo->tx_chan ? "[TX]" : " ",
859 fifo->rx_chan ? "[RX]" : " ");
860}
861
862/*
863 * irq functions
864 */
865static int usbhsf_irq_empty(struct usbhs_priv *priv,
866 struct usbhs_irq_state *irq_state)
867{
868 struct usbhs_pipe *pipe;
869 struct device *dev = usbhs_priv_to_dev(priv);
870 int i, ret;
871
872 if (!irq_state->bempsts) {
873 dev_err(dev, "debug %s !!\n", __func__);
874 return -EIO;
875 }
876
877 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
878
879 /*
880 * search interrupted "pipe"
881 * not "uep".
882 */
883 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
884 if (!(irq_state->bempsts & (1 << i)))
885 continue;
886
887 ret = usbhs_pkt_run(pipe);
888 if (ret < 0)
889 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
890 }
891
892 return 0;
893}
894
895static int usbhsf_irq_ready(struct usbhs_priv *priv,
896 struct usbhs_irq_state *irq_state)
897{
898 struct usbhs_pipe *pipe;
899 struct device *dev = usbhs_priv_to_dev(priv);
900 int i, ret;
901
902 if (!irq_state->brdysts) {
903 dev_err(dev, "debug %s !!\n", __func__);
904 return -EIO;
905 }
906
907 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
908
909 /*
910 * search interrupted "pipe"
911 * not "uep".
912 */
913 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
914 if (!(irq_state->brdysts & (1 << i)))
915 continue;
916
917 ret = usbhs_pkt_run(pipe);
918 if (ret < 0)
919 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
920 }
921
922 return 0;
923}
924
925static void usbhsf_dma_complete(void *arg)
926{
927 struct usbhs_pipe *pipe = arg;
928 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
929 struct device *dev = usbhs_priv_to_dev(priv);
930 int ret;
931
932 ret = usbhs_pkt_dmadone(pipe);
933 if (ret < 0)
934 dev_err(dev, "dma_complete run_error %d : %d\n",
935 usbhs_pipe_number(pipe), ret);
936}
937
938/*
939 * fifo init
940 */
941void usbhs_fifo_init(struct usbhs_priv *priv)
942{
943 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
944 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
945 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
946 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
947
948 mod->irq_empty = usbhsf_irq_empty;
949 mod->irq_ready = usbhsf_irq_ready;
950 mod->irq_bempsts = 0;
951 mod->irq_brdysts = 0;
952
953 cfifo->pipe = NULL;
954 cfifo->tx_chan = NULL;
955 cfifo->rx_chan = NULL;
956
957 d0fifo->pipe = NULL;
958 d0fifo->tx_chan = NULL;
959 d0fifo->rx_chan = NULL;
960
961 d1fifo->pipe = NULL;
962 d1fifo->tx_chan = NULL;
963 d1fifo->rx_chan = NULL;
964
965 usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
966 usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
967}
968
969void usbhs_fifo_quit(struct usbhs_priv *priv)
970{
971 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
972
973 mod->irq_empty = NULL;
974 mod->irq_ready = NULL;
975 mod->irq_bempsts = 0;
976 mod->irq_brdysts = 0;
977
978 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
979 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
980}
981
982int usbhs_fifo_probe(struct usbhs_priv *priv)
983{
984 struct usbhs_fifo *fifo;
985
986 /* CFIFO */
987 fifo = usbhsf_get_cfifo(priv);
988 fifo->name = "CFIFO";
989 fifo->port = CFIFO;
990 fifo->sel = CFIFOSEL;
991 fifo->ctr = CFIFOCTR;
992
993 /* D0FIFO */
994 fifo = usbhsf_get_d0fifo(priv);
995 fifo->name = "D0FIFO";
996 fifo->port = D0FIFO;
997 fifo->sel = D0FIFOSEL;
998 fifo->ctr = D0FIFOCTR;
999 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1000 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1001
1002 /* D1FIFO */
1003 fifo = usbhsf_get_d1fifo(priv);
1004 fifo->name = "D1FIFO";
1005 fifo->port = D1FIFO;
1006 fifo->sel = D1FIFOSEL;
1007 fifo->ctr = D1FIFOCTR;
1008 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1009 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1010
1011 return 0;
1012}
1013
1014void usbhs_fifo_remove(struct usbhs_priv *priv)
1015{
1016}
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_get_d0fifo(p) (&((p)->fifo_info.d0fifo))
25#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo))
26#define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f)
27
28#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
29
30/*
31 * packet initialize
32 */
33void usbhs_pkt_init(struct usbhs_pkt *pkt)
34{
35 pkt->dma = DMA_ADDR_INVALID;
36 INIT_LIST_HEAD(&pkt->node);
37}
38
39/*
40 * packet control function
41 */
42static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
43{
44 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
45 struct device *dev = usbhs_priv_to_dev(priv);
46
47 dev_err(dev, "null handler\n");
48
49 return -EINVAL;
50}
51
52static struct usbhs_pkt_handle usbhsf_null_handler = {
53 .prepare = usbhsf_null_handle,
54 .try_run = usbhsf_null_handle,
55};
56
57void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
58 void (*done)(struct usbhs_priv *priv,
59 struct usbhs_pkt *pkt),
60 void *buf, int len, int zero, int sequence)
61{
62 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
63 struct device *dev = usbhs_priv_to_dev(priv);
64 unsigned long flags;
65
66 if (!done) {
67 dev_err(dev, "no done function\n");
68 return;
69 }
70
71 /******************** spin lock ********************/
72 usbhs_lock(priv, flags);
73
74 if (!pipe->handler) {
75 dev_err(dev, "no handler function\n");
76 pipe->handler = &usbhsf_null_handler;
77 }
78
79 list_move_tail(&pkt->node, &pipe->list);
80
81 /*
82 * each pkt must hold own handler.
83 * because handler might be changed by its situation.
84 * dma handler -> pio handler.
85 */
86 pkt->pipe = pipe;
87 pkt->buf = buf;
88 pkt->handler = pipe->handler;
89 pkt->length = len;
90 pkt->zero = zero;
91 pkt->actual = 0;
92 pkt->done = done;
93 pkt->sequence = sequence;
94
95 usbhs_unlock(priv, flags);
96 /******************** spin unlock ******************/
97}
98
99static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
100{
101 list_del_init(&pkt->node);
102}
103
104static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
105{
106 if (list_empty(&pipe->list))
107 return NULL;
108
109 return list_first_entry(&pipe->list, struct usbhs_pkt, node);
110}
111
112struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
113{
114 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
115 unsigned long flags;
116
117 /******************** spin lock ********************/
118 usbhs_lock(priv, flags);
119
120 if (!pkt)
121 pkt = __usbhsf_pkt_get(pipe);
122
123 if (pkt)
124 __usbhsf_pkt_del(pkt);
125
126 usbhs_unlock(priv, flags);
127 /******************** spin unlock ******************/
128
129 return pkt;
130}
131
132enum {
133 USBHSF_PKT_PREPARE,
134 USBHSF_PKT_TRY_RUN,
135 USBHSF_PKT_DMA_DONE,
136};
137
138static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
139{
140 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
141 struct usbhs_pkt *pkt;
142 struct device *dev = usbhs_priv_to_dev(priv);
143 int (*func)(struct usbhs_pkt *pkt, int *is_done);
144 unsigned long flags;
145 int ret = 0;
146 int is_done = 0;
147
148 /******************** spin lock ********************/
149 usbhs_lock(priv, flags);
150
151 pkt = __usbhsf_pkt_get(pipe);
152 if (!pkt)
153 goto __usbhs_pkt_handler_end;
154
155 switch (type) {
156 case USBHSF_PKT_PREPARE:
157 func = pkt->handler->prepare;
158 break;
159 case USBHSF_PKT_TRY_RUN:
160 func = pkt->handler->try_run;
161 break;
162 case USBHSF_PKT_DMA_DONE:
163 func = pkt->handler->dma_done;
164 break;
165 default:
166 dev_err(dev, "unknown pkt hander\n");
167 goto __usbhs_pkt_handler_end;
168 }
169
170 ret = func(pkt, &is_done);
171
172 if (is_done)
173 __usbhsf_pkt_del(pkt);
174
175__usbhs_pkt_handler_end:
176 usbhs_unlock(priv, flags);
177 /******************** spin unlock ******************/
178
179 if (is_done) {
180 pkt->done(priv, pkt);
181 usbhs_pkt_start(pipe);
182 }
183
184 return ret;
185}
186
187void usbhs_pkt_start(struct usbhs_pipe *pipe)
188{
189 usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
190}
191
192/*
193 * irq enable/disable function
194 */
195#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e)
196#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e)
197#define usbhsf_irq_callback_ctrl(pipe, status, enable) \
198 ({ \
199 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
200 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
201 u16 status = (1 << usbhs_pipe_number(pipe)); \
202 if (!mod) \
203 return; \
204 if (enable) \
205 mod->irq_##status |= status; \
206 else \
207 mod->irq_##status &= ~status; \
208 usbhs_irq_callback_update(priv, mod); \
209 })
210
211static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
212{
213 /*
214 * And DCP pipe can NOT use "ready interrupt" for "send"
215 * it should use "empty" interrupt.
216 * see
217 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
218 *
219 * on the other hand, normal pipe can use "ready interrupt" for "send"
220 * even though it is single/double buffer
221 */
222 if (usbhs_pipe_is_dcp(pipe))
223 usbhsf_irq_empty_ctrl(pipe, enable);
224 else
225 usbhsf_irq_ready_ctrl(pipe, enable);
226}
227
228static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
229{
230 usbhsf_irq_ready_ctrl(pipe, enable);
231}
232
233/*
234 * FIFO ctrl
235 */
236static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
237 struct usbhs_fifo *fifo)
238{
239 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
240
241 usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
242}
243
244static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
245 struct usbhs_fifo *fifo)
246{
247 int timeout = 1024;
248
249 do {
250 /* The FIFO port is accessible */
251 if (usbhs_read(priv, fifo->ctr) & FRDY)
252 return 0;
253
254 udelay(10);
255 } while (timeout--);
256
257 return -EBUSY;
258}
259
260static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
261 struct usbhs_fifo *fifo)
262{
263 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
264
265 if (!usbhs_pipe_is_dcp(pipe))
266 usbhsf_fifo_barrier(priv, fifo);
267
268 usbhs_write(priv, fifo->ctr, BCLR);
269}
270
271static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
272 struct usbhs_fifo *fifo)
273{
274 return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
275}
276
277static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
278 struct usbhs_fifo *fifo)
279{
280 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
281
282 usbhs_pipe_select_fifo(pipe, NULL);
283 usbhs_write(priv, fifo->sel, 0);
284}
285
286static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
287 struct usbhs_fifo *fifo,
288 int write)
289{
290 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
291 struct device *dev = usbhs_priv_to_dev(priv);
292 int timeout = 1024;
293 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
294 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
295
296 if (usbhs_pipe_is_busy(pipe) ||
297 usbhsf_fifo_is_busy(fifo))
298 return -EBUSY;
299
300 if (usbhs_pipe_is_dcp(pipe)) {
301 base |= (1 == write) << 5; /* ISEL */
302
303 if (usbhs_mod_is_host(priv))
304 usbhs_dcp_dir_for_host(pipe, write);
305 }
306
307 /* "base" will be used below */
308 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
309 usbhs_write(priv, fifo->sel, base);
310 else
311 usbhs_write(priv, fifo->sel, base | MBW_32);
312
313 /* check ISEL and CURPIPE value */
314 while (timeout--) {
315 if (base == (mask & usbhs_read(priv, fifo->sel))) {
316 usbhs_pipe_select_fifo(pipe, fifo);
317 return 0;
318 }
319 udelay(10);
320 }
321
322 dev_err(dev, "fifo select error\n");
323
324 return -EIO;
325}
326
327/*
328 * DCP status stage
329 */
330static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
331{
332 struct usbhs_pipe *pipe = pkt->pipe;
333 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
334 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
335 struct device *dev = usbhs_priv_to_dev(priv);
336 int ret;
337
338 usbhs_pipe_disable(pipe);
339
340 ret = usbhsf_fifo_select(pipe, fifo, 1);
341 if (ret < 0) {
342 dev_err(dev, "%s() faile\n", __func__);
343 return ret;
344 }
345
346 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
347
348 usbhsf_fifo_clear(pipe, fifo);
349 usbhsf_send_terminator(pipe, fifo);
350
351 usbhsf_fifo_unselect(pipe, fifo);
352
353 usbhsf_tx_irq_ctrl(pipe, 1);
354 usbhs_pipe_enable(pipe);
355
356 return ret;
357}
358
359static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
360{
361 struct usbhs_pipe *pipe = pkt->pipe;
362 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
363 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
364 struct device *dev = usbhs_priv_to_dev(priv);
365 int ret;
366
367 usbhs_pipe_disable(pipe);
368
369 ret = usbhsf_fifo_select(pipe, fifo, 0);
370 if (ret < 0) {
371 dev_err(dev, "%s() fail\n", __func__);
372 return ret;
373 }
374
375 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
376 usbhsf_fifo_clear(pipe, fifo);
377
378 usbhsf_fifo_unselect(pipe, fifo);
379
380 usbhsf_rx_irq_ctrl(pipe, 1);
381 usbhs_pipe_enable(pipe);
382
383 return ret;
384
385}
386
387static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
388{
389 struct usbhs_pipe *pipe = pkt->pipe;
390
391 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
392 usbhsf_tx_irq_ctrl(pipe, 0);
393 else
394 usbhsf_rx_irq_ctrl(pipe, 0);
395
396 pkt->actual = pkt->length;
397 *is_done = 1;
398
399 return 0;
400}
401
402struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
403 .prepare = usbhs_dcp_dir_switch_to_write,
404 .try_run = usbhs_dcp_dir_switch_done,
405};
406
407struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
408 .prepare = usbhs_dcp_dir_switch_to_read,
409 .try_run = usbhs_dcp_dir_switch_done,
410};
411
412/*
413 * DCP data stage (push)
414 */
415static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
416{
417 struct usbhs_pipe *pipe = pkt->pipe;
418
419 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
420
421 /*
422 * change handler to PIO push
423 */
424 pkt->handler = &usbhs_fifo_pio_push_handler;
425
426 return pkt->handler->prepare(pkt, is_done);
427}
428
429struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
430 .prepare = usbhsf_dcp_data_stage_try_push,
431};
432
433/*
434 * DCP data stage (pop)
435 */
436static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
437 int *is_done)
438{
439 struct usbhs_pipe *pipe = pkt->pipe;
440 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
441 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
442
443 if (usbhs_pipe_is_busy(pipe))
444 return 0;
445
446 /*
447 * prepare pop for DCP should
448 * - change DCP direction,
449 * - clear fifo
450 * - DATA1
451 */
452 usbhs_pipe_disable(pipe);
453
454 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
455
456 usbhsf_fifo_select(pipe, fifo, 0);
457 usbhsf_fifo_clear(pipe, fifo);
458 usbhsf_fifo_unselect(pipe, fifo);
459
460 /*
461 * change handler to PIO pop
462 */
463 pkt->handler = &usbhs_fifo_pio_pop_handler;
464
465 return pkt->handler->prepare(pkt, is_done);
466}
467
468struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
469 .prepare = usbhsf_dcp_data_stage_prepare_pop,
470};
471
472/*
473 * PIO push handler
474 */
475static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
476{
477 struct usbhs_pipe *pipe = pkt->pipe;
478 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
479 struct device *dev = usbhs_priv_to_dev(priv);
480 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
481 void __iomem *addr = priv->base + fifo->port;
482 u8 *buf;
483 int maxp = usbhs_pipe_get_maxpacket(pipe);
484 int total_len;
485 int i, ret, len;
486 int is_short;
487
488 usbhs_pipe_data_sequence(pipe, pkt->sequence);
489 pkt->sequence = -1; /* -1 sequence will be ignored */
490
491 ret = usbhsf_fifo_select(pipe, fifo, 1);
492 if (ret < 0)
493 return 0;
494
495 ret = usbhs_pipe_is_accessible(pipe);
496 if (ret < 0) {
497 /* inaccessible pipe is not an error */
498 ret = 0;
499 goto usbhs_fifo_write_busy;
500 }
501
502 ret = usbhsf_fifo_barrier(priv, fifo);
503 if (ret < 0)
504 goto usbhs_fifo_write_busy;
505
506 buf = pkt->buf + pkt->actual;
507 len = pkt->length - pkt->actual;
508 len = min(len, maxp);
509 total_len = len;
510 is_short = total_len < maxp;
511
512 /*
513 * FIXME
514 *
515 * 32-bit access only
516 */
517 if (len >= 4 && !((unsigned long)buf & 0x03)) {
518 iowrite32_rep(addr, buf, len / 4);
519 len %= 4;
520 buf += total_len - len;
521 }
522
523 /* the rest operation */
524 for (i = 0; i < len; i++)
525 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
526
527 /*
528 * variable update
529 */
530 pkt->actual += total_len;
531
532 if (pkt->actual < pkt->length)
533 *is_done = 0; /* there are remainder data */
534 else if (is_short)
535 *is_done = 1; /* short packet */
536 else
537 *is_done = !pkt->zero; /* send zero packet ? */
538
539 /*
540 * pipe/irq handling
541 */
542 if (is_short)
543 usbhsf_send_terminator(pipe, fifo);
544
545 usbhsf_tx_irq_ctrl(pipe, !*is_done);
546 usbhs_pipe_enable(pipe);
547
548 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
549 usbhs_pipe_number(pipe),
550 pkt->length, pkt->actual, *is_done, pkt->zero);
551
552 /*
553 * Transmission end
554 */
555 if (*is_done) {
556 if (usbhs_pipe_is_dcp(pipe))
557 usbhs_dcp_control_transfer_done(pipe);
558 }
559
560 usbhsf_fifo_unselect(pipe, fifo);
561
562 return 0;
563
564usbhs_fifo_write_busy:
565 usbhsf_fifo_unselect(pipe, fifo);
566
567 /*
568 * pipe is busy.
569 * retry in interrupt
570 */
571 usbhsf_tx_irq_ctrl(pipe, 1);
572
573 return ret;
574}
575
576struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
577 .prepare = usbhsf_pio_try_push,
578 .try_run = usbhsf_pio_try_push,
579};
580
581/*
582 * PIO pop handler
583 */
584static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
585{
586 struct usbhs_pipe *pipe = pkt->pipe;
587
588 if (usbhs_pipe_is_busy(pipe))
589 return 0;
590
591 /*
592 * pipe enable to prepare packet receive
593 */
594 usbhs_pipe_data_sequence(pipe, pkt->sequence);
595 pkt->sequence = -1; /* -1 sequence will be ignored */
596
597 usbhs_pipe_enable(pipe);
598 usbhsf_rx_irq_ctrl(pipe, 1);
599
600 return 0;
601}
602
603static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
604{
605 struct usbhs_pipe *pipe = pkt->pipe;
606 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
607 struct device *dev = usbhs_priv_to_dev(priv);
608 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
609 void __iomem *addr = priv->base + fifo->port;
610 u8 *buf;
611 u32 data = 0;
612 int maxp = usbhs_pipe_get_maxpacket(pipe);
613 int rcv_len, len;
614 int i, ret;
615 int total_len = 0;
616
617 ret = usbhsf_fifo_select(pipe, fifo, 0);
618 if (ret < 0)
619 return 0;
620
621 ret = usbhsf_fifo_barrier(priv, fifo);
622 if (ret < 0)
623 goto usbhs_fifo_read_busy;
624
625 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
626
627 buf = pkt->buf + pkt->actual;
628 len = pkt->length - pkt->actual;
629 len = min(len, rcv_len);
630 total_len = len;
631
632 /*
633 * update actual length first here to decide disable pipe.
634 * if this pipe keeps BUF status and all data were popped,
635 * then, next interrupt/token will be issued again
636 */
637 pkt->actual += total_len;
638
639 if ((pkt->actual == pkt->length) || /* receive all data */
640 (total_len < maxp)) { /* short packet */
641 *is_done = 1;
642 usbhsf_rx_irq_ctrl(pipe, 0);
643 usbhs_pipe_disable(pipe); /* disable pipe first */
644 }
645
646 /*
647 * Buffer clear if Zero-Length packet
648 *
649 * see
650 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
651 */
652 if (0 == rcv_len) {
653 pkt->zero = 1;
654 usbhsf_fifo_clear(pipe, fifo);
655 goto usbhs_fifo_read_end;
656 }
657
658 /*
659 * FIXME
660 *
661 * 32-bit access only
662 */
663 if (len >= 4 && !((unsigned long)buf & 0x03)) {
664 ioread32_rep(addr, buf, len / 4);
665 len %= 4;
666 buf += total_len - len;
667 }
668
669 /* the rest operation */
670 for (i = 0; i < len; i++) {
671 if (!(i & 0x03))
672 data = ioread32(addr);
673
674 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
675 }
676
677usbhs_fifo_read_end:
678 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
679 usbhs_pipe_number(pipe),
680 pkt->length, pkt->actual, *is_done, pkt->zero);
681
682usbhs_fifo_read_busy:
683 usbhsf_fifo_unselect(pipe, fifo);
684
685 return ret;
686}
687
688struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
689 .prepare = usbhsf_prepare_pop,
690 .try_run = usbhsf_pio_try_pop,
691};
692
693/*
694 * DCP ctrol statge handler
695 */
696static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
697{
698 usbhs_dcp_control_transfer_done(pkt->pipe);
699
700 *is_done = 1;
701
702 return 0;
703}
704
705struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
706 .prepare = usbhsf_ctrl_stage_end,
707 .try_run = usbhsf_ctrl_stage_end,
708};
709
710/*
711 * DMA fifo functions
712 */
713static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
714 struct usbhs_pkt *pkt)
715{
716 if (&usbhs_fifo_dma_push_handler == pkt->handler)
717 return fifo->tx_chan;
718
719 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
720 return fifo->rx_chan;
721
722 return NULL;
723}
724
725static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
726 struct usbhs_pkt *pkt)
727{
728 struct usbhs_fifo *fifo;
729
730 /* DMA :: D0FIFO */
731 fifo = usbhsf_get_d0fifo(priv);
732 if (usbhsf_dma_chan_get(fifo, pkt) &&
733 !usbhsf_fifo_is_busy(fifo))
734 return fifo;
735
736 /* DMA :: D1FIFO */
737 fifo = usbhsf_get_d1fifo(priv);
738 if (usbhsf_dma_chan_get(fifo, pkt) &&
739 !usbhsf_fifo_is_busy(fifo))
740 return fifo;
741
742 return NULL;
743}
744
745#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
746#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
747static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
748 struct usbhs_fifo *fifo,
749 u16 dreqe)
750{
751 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
752
753 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
754}
755
756#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
757#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
758static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
759{
760 struct usbhs_pipe *pipe = pkt->pipe;
761 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
762 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
763
764 return info->dma_map_ctrl(pkt, map);
765}
766
767static void usbhsf_dma_complete(void *arg);
768static void xfer_work(struct work_struct *work)
769{
770 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
771 struct usbhs_pipe *pipe = pkt->pipe;
772 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
773 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
774 struct scatterlist sg;
775 struct dma_async_tx_descriptor *desc;
776 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
777 struct device *dev = usbhs_priv_to_dev(priv);
778 enum dma_transfer_direction dir;
779 dma_cookie_t cookie;
780
781 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
782
783 sg_init_table(&sg, 1);
784 sg_set_page(&sg, virt_to_page(pkt->dma),
785 pkt->length, offset_in_page(pkt->dma));
786 sg_dma_address(&sg) = pkt->dma + pkt->actual;
787 sg_dma_len(&sg) = pkt->trans;
788
789 desc = dmaengine_prep_slave_sg(chan, &sg, 1, dir,
790 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
791 if (!desc)
792 return;
793
794 desc->callback = usbhsf_dma_complete;
795 desc->callback_param = pipe;
796
797 cookie = desc->tx_submit(desc);
798 if (cookie < 0) {
799 dev_err(dev, "Failed to submit dma descriptor\n");
800 return;
801 }
802
803 dev_dbg(dev, " %s %d (%d/ %d)\n",
804 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
805
806 usbhsf_dma_start(pipe, fifo);
807 dma_async_issue_pending(chan);
808}
809
810/*
811 * DMA push handler
812 */
813static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
814{
815 struct usbhs_pipe *pipe = pkt->pipe;
816 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
817 struct usbhs_fifo *fifo;
818 int len = pkt->length - pkt->actual;
819 int ret;
820
821 if (usbhs_pipe_is_busy(pipe))
822 return 0;
823
824 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
825 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
826 usbhs_pipe_is_dcp(pipe))
827 goto usbhsf_pio_prepare_push;
828
829 if (len % 4) /* 32bit alignment */
830 goto usbhsf_pio_prepare_push;
831
832 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
833 goto usbhsf_pio_prepare_push;
834
835 /* get enable DMA fifo */
836 fifo = usbhsf_get_dma_fifo(priv, pkt);
837 if (!fifo)
838 goto usbhsf_pio_prepare_push;
839
840 if (usbhsf_dma_map(pkt) < 0)
841 goto usbhsf_pio_prepare_push;
842
843 ret = usbhsf_fifo_select(pipe, fifo, 0);
844 if (ret < 0)
845 goto usbhsf_pio_prepare_push_unmap;
846
847 pkt->trans = len;
848
849 INIT_WORK(&pkt->work, xfer_work);
850 schedule_work(&pkt->work);
851
852 return 0;
853
854usbhsf_pio_prepare_push_unmap:
855 usbhsf_dma_unmap(pkt);
856usbhsf_pio_prepare_push:
857 /*
858 * change handler to PIO
859 */
860 pkt->handler = &usbhs_fifo_pio_push_handler;
861
862 return pkt->handler->prepare(pkt, is_done);
863}
864
865static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
866{
867 struct usbhs_pipe *pipe = pkt->pipe;
868
869 pkt->actual = pkt->trans;
870
871 *is_done = !pkt->zero; /* send zero packet ? */
872
873 usbhsf_dma_stop(pipe, pipe->fifo);
874 usbhsf_dma_unmap(pkt);
875 usbhsf_fifo_unselect(pipe, pipe->fifo);
876
877 return 0;
878}
879
880struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
881 .prepare = usbhsf_dma_prepare_push,
882 .dma_done = usbhsf_dma_push_done,
883};
884
885/*
886 * DMA pop handler
887 */
888static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
889{
890 struct usbhs_pipe *pipe = pkt->pipe;
891 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
892 struct usbhs_fifo *fifo;
893 int len, ret;
894
895 if (usbhs_pipe_is_busy(pipe))
896 return 0;
897
898 if (usbhs_pipe_is_dcp(pipe))
899 goto usbhsf_pio_prepare_pop;
900
901 /* get enable DMA fifo */
902 fifo = usbhsf_get_dma_fifo(priv, pkt);
903 if (!fifo)
904 goto usbhsf_pio_prepare_pop;
905
906 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
907 goto usbhsf_pio_prepare_pop;
908
909 ret = usbhsf_fifo_select(pipe, fifo, 0);
910 if (ret < 0)
911 goto usbhsf_pio_prepare_pop;
912
913 /* use PIO if packet is less than pio_dma_border */
914 len = usbhsf_fifo_rcv_len(priv, fifo);
915 len = min(pkt->length - pkt->actual, len);
916 if (len % 4) /* 32bit alignment */
917 goto usbhsf_pio_prepare_pop_unselect;
918
919 if (len < usbhs_get_dparam(priv, pio_dma_border))
920 goto usbhsf_pio_prepare_pop_unselect;
921
922 ret = usbhsf_fifo_barrier(priv, fifo);
923 if (ret < 0)
924 goto usbhsf_pio_prepare_pop_unselect;
925
926 if (usbhsf_dma_map(pkt) < 0)
927 goto usbhsf_pio_prepare_pop_unselect;
928
929 /* DMA */
930
931 /*
932 * usbhs_fifo_dma_pop_handler :: prepare
933 * enabled irq to come here.
934 * but it is no longer needed for DMA. disable it.
935 */
936 usbhsf_rx_irq_ctrl(pipe, 0);
937
938 pkt->trans = len;
939
940 INIT_WORK(&pkt->work, xfer_work);
941 schedule_work(&pkt->work);
942
943 return 0;
944
945usbhsf_pio_prepare_pop_unselect:
946 usbhsf_fifo_unselect(pipe, fifo);
947usbhsf_pio_prepare_pop:
948
949 /*
950 * change handler to PIO
951 */
952 pkt->handler = &usbhs_fifo_pio_pop_handler;
953
954 return pkt->handler->try_run(pkt, is_done);
955}
956
957static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
958{
959 struct usbhs_pipe *pipe = pkt->pipe;
960 int maxp = usbhs_pipe_get_maxpacket(pipe);
961
962 usbhsf_dma_stop(pipe, pipe->fifo);
963 usbhsf_dma_unmap(pkt);
964 usbhsf_fifo_unselect(pipe, pipe->fifo);
965
966 pkt->actual += pkt->trans;
967
968 if ((pkt->actual == pkt->length) || /* receive all data */
969 (pkt->trans < maxp)) { /* short packet */
970 *is_done = 1;
971 } else {
972 /* re-enable */
973 usbhsf_prepare_pop(pkt, is_done);
974 }
975
976 return 0;
977}
978
979struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
980 .prepare = usbhsf_prepare_pop,
981 .try_run = usbhsf_dma_try_pop,
982 .dma_done = usbhsf_dma_pop_done
983};
984
985/*
986 * DMA setting
987 */
988static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
989{
990 struct sh_dmae_slave *slave = param;
991
992 /*
993 * FIXME
994 *
995 * usbhs doesn't recognize id = 0 as valid DMA
996 */
997 if (0 == slave->slave_id)
998 return false;
999
1000 chan->private = slave;
1001
1002 return true;
1003}
1004
1005static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1006{
1007 if (fifo->tx_chan)
1008 dma_release_channel(fifo->tx_chan);
1009 if (fifo->rx_chan)
1010 dma_release_channel(fifo->rx_chan);
1011
1012 fifo->tx_chan = NULL;
1013 fifo->rx_chan = NULL;
1014}
1015
1016static void usbhsf_dma_init(struct usbhs_priv *priv,
1017 struct usbhs_fifo *fifo)
1018{
1019 struct device *dev = usbhs_priv_to_dev(priv);
1020 dma_cap_mask_t mask;
1021
1022 dma_cap_zero(mask);
1023 dma_cap_set(DMA_SLAVE, mask);
1024 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1025 &fifo->tx_slave);
1026
1027 dma_cap_zero(mask);
1028 dma_cap_set(DMA_SLAVE, mask);
1029 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1030 &fifo->rx_slave);
1031
1032 if (fifo->tx_chan || fifo->rx_chan)
1033 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1034 fifo->name,
1035 fifo->tx_chan ? "[TX]" : " ",
1036 fifo->rx_chan ? "[RX]" : " ");
1037}
1038
1039/*
1040 * irq functions
1041 */
1042static int usbhsf_irq_empty(struct usbhs_priv *priv,
1043 struct usbhs_irq_state *irq_state)
1044{
1045 struct usbhs_pipe *pipe;
1046 struct device *dev = usbhs_priv_to_dev(priv);
1047 int i, ret;
1048
1049 if (!irq_state->bempsts) {
1050 dev_err(dev, "debug %s !!\n", __func__);
1051 return -EIO;
1052 }
1053
1054 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1055
1056 /*
1057 * search interrupted "pipe"
1058 * not "uep".
1059 */
1060 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1061 if (!(irq_state->bempsts & (1 << i)))
1062 continue;
1063
1064 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1065 if (ret < 0)
1066 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1067 }
1068
1069 return 0;
1070}
1071
1072static int usbhsf_irq_ready(struct usbhs_priv *priv,
1073 struct usbhs_irq_state *irq_state)
1074{
1075 struct usbhs_pipe *pipe;
1076 struct device *dev = usbhs_priv_to_dev(priv);
1077 int i, ret;
1078
1079 if (!irq_state->brdysts) {
1080 dev_err(dev, "debug %s !!\n", __func__);
1081 return -EIO;
1082 }
1083
1084 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1085
1086 /*
1087 * search interrupted "pipe"
1088 * not "uep".
1089 */
1090 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1091 if (!(irq_state->brdysts & (1 << i)))
1092 continue;
1093
1094 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1095 if (ret < 0)
1096 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1097 }
1098
1099 return 0;
1100}
1101
1102static void usbhsf_dma_complete(void *arg)
1103{
1104 struct usbhs_pipe *pipe = arg;
1105 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1106 struct device *dev = usbhs_priv_to_dev(priv);
1107 int ret;
1108
1109 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1110 if (ret < 0)
1111 dev_err(dev, "dma_complete run_error %d : %d\n",
1112 usbhs_pipe_number(pipe), ret);
1113}
1114
1115/*
1116 * fifo init
1117 */
1118void usbhs_fifo_init(struct usbhs_priv *priv)
1119{
1120 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1121 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1122 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1123 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1124
1125 mod->irq_empty = usbhsf_irq_empty;
1126 mod->irq_ready = usbhsf_irq_ready;
1127 mod->irq_bempsts = 0;
1128 mod->irq_brdysts = 0;
1129
1130 cfifo->pipe = NULL;
1131 cfifo->tx_chan = NULL;
1132 cfifo->rx_chan = NULL;
1133
1134 d0fifo->pipe = NULL;
1135 d0fifo->tx_chan = NULL;
1136 d0fifo->rx_chan = NULL;
1137
1138 d1fifo->pipe = NULL;
1139 d1fifo->tx_chan = NULL;
1140 d1fifo->rx_chan = NULL;
1141
1142 usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
1143 usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
1144}
1145
1146void usbhs_fifo_quit(struct usbhs_priv *priv)
1147{
1148 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1149
1150 mod->irq_empty = NULL;
1151 mod->irq_ready = NULL;
1152 mod->irq_bempsts = 0;
1153 mod->irq_brdysts = 0;
1154
1155 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1156 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
1157}
1158
1159int usbhs_fifo_probe(struct usbhs_priv *priv)
1160{
1161 struct usbhs_fifo *fifo;
1162
1163 /* CFIFO */
1164 fifo = usbhsf_get_cfifo(priv);
1165 fifo->name = "CFIFO";
1166 fifo->port = CFIFO;
1167 fifo->sel = CFIFOSEL;
1168 fifo->ctr = CFIFOCTR;
1169
1170 /* D0FIFO */
1171 fifo = usbhsf_get_d0fifo(priv);
1172 fifo->name = "D0FIFO";
1173 fifo->port = D0FIFO;
1174 fifo->sel = D0FIFOSEL;
1175 fifo->ctr = D0FIFOCTR;
1176 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1177 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1178
1179 /* D1FIFO */
1180 fifo = usbhsf_get_d1fifo(priv);
1181 fifo->name = "D1FIFO";
1182 fifo->port = D1FIFO;
1183 fifo->sel = D1FIFOSEL;
1184 fifo->ctr = D1FIFOCTR;
1185 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1186 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1187
1188 return 0;
1189}
1190
1191void usbhs_fifo_remove(struct usbhs_priv *priv)
1192{
1193}