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