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authorTony Lindgren <tony@atomide.com>2010-03-01 17:19:05 -0500
committerTony Lindgren <tony@atomide.com>2010-03-01 17:19:05 -0500
commitd702d12167a2c05a346f49aac7a311d597762495 (patch)
treebaae42c299cce34d6df24b5d01f8b1d0b481bd9a /sound/soc/sh/siu_pcm.c
parent9418c65f9bd861d0f7e39aab9cfb3aa6f2275d11 (diff)
parentac0f6f927db539e03e1f3f61bcd4ed57d5cde7a9 (diff)
Merge with mainline to remove plat-omap/Kconfig conflict
Conflicts: arch/arm/plat-omap/Kconfig
Diffstat (limited to 'sound/soc/sh/siu_pcm.c')
-rw-r--r--sound/soc/sh/siu_pcm.c616
1 files changed, 616 insertions, 0 deletions
diff --git a/sound/soc/sh/siu_pcm.c b/sound/soc/sh/siu_pcm.c
new file mode 100644
index 000000000000..c5efc30f0136
--- /dev/null
+++ b/sound/soc/sh/siu_pcm.c
@@ -0,0 +1,616 @@
1/*
2 * siu_pcm.c - ALSA driver for Renesas SH7343, SH7722 SIU peripheral.
3 *
4 * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21#include <linux/delay.h>
22#include <linux/dma-mapping.h>
23#include <linux/dmaengine.h>
24#include <linux/interrupt.h>
25#include <linux/module.h>
26#include <linux/platform_device.h>
27#include <linux/slab.h>
28
29#include <sound/control.h>
30#include <sound/core.h>
31#include <sound/pcm.h>
32#include <sound/pcm_params.h>
33#include <sound/soc-dai.h>
34
35#include <asm/dma-sh.h>
36#include <asm/siu.h>
37
38#include "siu.h"
39
40#define GET_MAX_PERIODS(buf_bytes, period_bytes) \
41 ((buf_bytes) / (period_bytes))
42#define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
43 ((buf_addr) + ((period_num) * (period_bytes)))
44
45#define RWF_STM_RD 0x01 /* Read in progress */
46#define RWF_STM_WT 0x02 /* Write in progress */
47
48struct siu_port *siu_ports[SIU_PORT_NUM];
49
50/* transfersize is number of u32 dma transfers per period */
51static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
52{
53 struct siu_info *info = siu_i2s_dai.private_data;
54 u32 __iomem *base = info->reg;
55 struct siu_stream *siu_stream = &port_info->playback;
56 u32 stfifo;
57
58 if (!siu_stream->rw_flg)
59 return -EPERM;
60
61 /* output FIFO disable */
62 stfifo = siu_read32(base + SIU_STFIFO);
63 siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
64 pr_debug("%s: STFIFO %x -> %x\n", __func__,
65 stfifo, stfifo & ~0x0c180c18);
66
67 /* during stmwrite clear */
68 siu_stream->rw_flg = 0;
69
70 return 0;
71}
72
73static int siu_pcm_stmwrite_start(struct siu_port *port_info)
74{
75 struct siu_stream *siu_stream = &port_info->playback;
76
77 if (siu_stream->rw_flg)
78 return -EPERM;
79
80 /* Current period in buffer */
81 port_info->playback.cur_period = 0;
82
83 /* during stmwrite flag set */
84 siu_stream->rw_flg = RWF_STM_WT;
85
86 /* DMA transfer start */
87 tasklet_schedule(&siu_stream->tasklet);
88
89 return 0;
90}
91
92static void siu_dma_tx_complete(void *arg)
93{
94 struct siu_stream *siu_stream = arg;
95
96 if (!siu_stream->rw_flg)
97 return;
98
99 /* Update completed period count */
100 if (++siu_stream->cur_period >=
101 GET_MAX_PERIODS(siu_stream->buf_bytes,
102 siu_stream->period_bytes))
103 siu_stream->cur_period = 0;
104
105 pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
106 __func__, siu_stream->cur_period,
107 siu_stream->cur_period * siu_stream->period_bytes,
108 siu_stream->buf_bytes, siu_stream->cookie);
109
110 tasklet_schedule(&siu_stream->tasklet);
111
112 /* Notify alsa: a period is done */
113 snd_pcm_period_elapsed(siu_stream->substream);
114}
115
116static int siu_pcm_wr_set(struct siu_port *port_info,
117 dma_addr_t buff, u32 size)
118{
119 struct siu_info *info = siu_i2s_dai.private_data;
120 u32 __iomem *base = info->reg;
121 struct siu_stream *siu_stream = &port_info->playback;
122 struct snd_pcm_substream *substream = siu_stream->substream;
123 struct device *dev = substream->pcm->card->dev;
124 struct dma_async_tx_descriptor *desc;
125 dma_cookie_t cookie;
126 struct scatterlist sg;
127 u32 stfifo;
128
129 sg_init_table(&sg, 1);
130 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
131 size, offset_in_page(buff));
132 sg_dma_address(&sg) = buff;
133
134 desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
135 &sg, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
136 if (!desc) {
137 dev_err(dev, "Failed to allocate a dma descriptor\n");
138 return -ENOMEM;
139 }
140
141 desc->callback = siu_dma_tx_complete;
142 desc->callback_param = siu_stream;
143 cookie = desc->tx_submit(desc);
144 if (cookie < 0) {
145 dev_err(dev, "Failed to submit a dma transfer\n");
146 return cookie;
147 }
148
149 siu_stream->tx_desc = desc;
150 siu_stream->cookie = cookie;
151
152 dma_async_issue_pending(siu_stream->chan);
153
154 /* only output FIFO enable */
155 stfifo = siu_read32(base + SIU_STFIFO);
156 siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18));
157 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
158 stfifo, stfifo | (port_info->stfifo & 0x0c180c18));
159
160 return 0;
161}
162
163static int siu_pcm_rd_set(struct siu_port *port_info,
164 dma_addr_t buff, size_t size)
165{
166 struct siu_info *info = siu_i2s_dai.private_data;
167 u32 __iomem *base = info->reg;
168 struct siu_stream *siu_stream = &port_info->capture;
169 struct snd_pcm_substream *substream = siu_stream->substream;
170 struct device *dev = substream->pcm->card->dev;
171 struct dma_async_tx_descriptor *desc;
172 dma_cookie_t cookie;
173 struct scatterlist sg;
174 u32 stfifo;
175
176 dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff);
177
178 sg_init_table(&sg, 1);
179 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
180 size, offset_in_page(buff));
181 sg_dma_address(&sg) = buff;
182
183 desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
184 &sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
185 if (!desc) {
186 dev_err(dev, "Failed to allocate dma descriptor\n");
187 return -ENOMEM;
188 }
189
190 desc->callback = siu_dma_tx_complete;
191 desc->callback_param = siu_stream;
192 cookie = desc->tx_submit(desc);
193 if (cookie < 0) {
194 dev_err(dev, "Failed to submit dma descriptor\n");
195 return cookie;
196 }
197
198 siu_stream->tx_desc = desc;
199 siu_stream->cookie = cookie;
200
201 dma_async_issue_pending(siu_stream->chan);
202
203 /* only input FIFO enable */
204 stfifo = siu_read32(base + SIU_STFIFO);
205 siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
206 (port_info->stfifo & 0x13071307));
207 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
208 stfifo, stfifo | (port_info->stfifo & 0x13071307));
209
210 return 0;
211}
212
213static void siu_io_tasklet(unsigned long data)
214{
215 struct siu_stream *siu_stream = (struct siu_stream *)data;
216 struct snd_pcm_substream *substream = siu_stream->substream;
217 struct device *dev = substream->pcm->card->dev;
218 struct snd_pcm_runtime *rt = substream->runtime;
219 struct siu_port *port_info = siu_port_info(substream);
220
221 dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
222
223 if (!siu_stream->rw_flg) {
224 dev_dbg(dev, "%s: stream inactive\n", __func__);
225 return;
226 }
227
228 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
229 dma_addr_t buff;
230 size_t count;
231 u8 *virt;
232
233 buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
234 siu_stream->cur_period,
235 siu_stream->period_bytes);
236 virt = PERIOD_OFFSET(rt->dma_area,
237 siu_stream->cur_period,
238 siu_stream->period_bytes);
239 count = siu_stream->period_bytes;
240
241 /* DMA transfer start */
242 siu_pcm_rd_set(port_info, buff, count);
243 } else {
244 siu_pcm_wr_set(port_info,
245 (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
246 siu_stream->cur_period,
247 siu_stream->period_bytes),
248 siu_stream->period_bytes);
249 }
250}
251
252/* Capture */
253static int siu_pcm_stmread_start(struct siu_port *port_info)
254{
255 struct siu_stream *siu_stream = &port_info->capture;
256
257 if (siu_stream->xfer_cnt > 0x1000000)
258 return -EINVAL;
259 if (siu_stream->rw_flg)
260 return -EPERM;
261
262 /* Current period in buffer */
263 siu_stream->cur_period = 0;
264
265 /* during stmread flag set */
266 siu_stream->rw_flg = RWF_STM_RD;
267
268 tasklet_schedule(&siu_stream->tasklet);
269
270 return 0;
271}
272
273static int siu_pcm_stmread_stop(struct siu_port *port_info)
274{
275 struct siu_info *info = siu_i2s_dai.private_data;
276 u32 __iomem *base = info->reg;
277 struct siu_stream *siu_stream = &port_info->capture;
278 struct device *dev = siu_stream->substream->pcm->card->dev;
279 u32 stfifo;
280
281 if (!siu_stream->rw_flg)
282 return -EPERM;
283
284 /* input FIFO disable */
285 stfifo = siu_read32(base + SIU_STFIFO);
286 siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
287 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
288 stfifo, stfifo & ~0x13071307);
289
290 /* during stmread flag clear */
291 siu_stream->rw_flg = 0;
292
293 return 0;
294}
295
296static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
297 struct snd_pcm_hw_params *hw_params)
298{
299 struct siu_info *info = siu_i2s_dai.private_data;
300 struct device *dev = ss->pcm->card->dev;
301 int ret;
302
303 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
304
305 ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
306 if (ret < 0)
307 dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
308
309 return ret;
310}
311
312static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
313{
314 struct siu_info *info = siu_i2s_dai.private_data;
315 struct siu_port *port_info = siu_port_info(ss);
316 struct device *dev = ss->pcm->card->dev;
317 struct siu_stream *siu_stream;
318
319 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
320 siu_stream = &port_info->playback;
321 else
322 siu_stream = &port_info->capture;
323
324 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
325
326 return snd_pcm_lib_free_pages(ss);
327}
328
329static bool filter(struct dma_chan *chan, void *slave)
330{
331 struct sh_dmae_slave *param = slave;
332
333 pr_debug("%s: slave ID %d\n", __func__, param->slave_id);
334
335 if (unlikely(param->dma_dev != chan->device->dev))
336 return false;
337
338 chan->private = param;
339 return true;
340}
341
342static int siu_pcm_open(struct snd_pcm_substream *ss)
343{
344 /* Playback / Capture */
345 struct siu_info *info = siu_i2s_dai.private_data;
346 struct siu_port *port_info = siu_port_info(ss);
347 struct siu_stream *siu_stream;
348 u32 port = info->port_id;
349 struct siu_platform *pdata = siu_i2s_dai.dev->platform_data;
350 struct device *dev = ss->pcm->card->dev;
351 dma_cap_mask_t mask;
352 struct sh_dmae_slave *param;
353
354 dma_cap_zero(mask);
355 dma_cap_set(DMA_SLAVE, mask);
356
357 dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info);
358
359 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) {
360 siu_stream = &port_info->playback;
361 param = &siu_stream->param;
362 param->slave_id = port ? SHDMA_SLAVE_SIUB_TX :
363 SHDMA_SLAVE_SIUA_TX;
364 } else {
365 siu_stream = &port_info->capture;
366 param = &siu_stream->param;
367 param->slave_id = port ? SHDMA_SLAVE_SIUB_RX :
368 SHDMA_SLAVE_SIUA_RX;
369 }
370
371 param->dma_dev = pdata->dma_dev;
372 /* Get DMA channel */
373 siu_stream->chan = dma_request_channel(mask, filter, param);
374 if (!siu_stream->chan) {
375 dev_err(dev, "DMA channel allocation failed!\n");
376 return -EBUSY;
377 }
378
379 siu_stream->substream = ss;
380
381 return 0;
382}
383
384static int siu_pcm_close(struct snd_pcm_substream *ss)
385{
386 struct siu_info *info = siu_i2s_dai.private_data;
387 struct device *dev = ss->pcm->card->dev;
388 struct siu_port *port_info = siu_port_info(ss);
389 struct siu_stream *siu_stream;
390
391 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
392
393 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
394 siu_stream = &port_info->playback;
395 else
396 siu_stream = &port_info->capture;
397
398 dma_release_channel(siu_stream->chan);
399 siu_stream->chan = NULL;
400
401 siu_stream->substream = NULL;
402
403 return 0;
404}
405
406static int siu_pcm_prepare(struct snd_pcm_substream *ss)
407{
408 struct siu_info *info = siu_i2s_dai.private_data;
409 struct siu_port *port_info = siu_port_info(ss);
410 struct device *dev = ss->pcm->card->dev;
411 struct snd_pcm_runtime *rt = ss->runtime;
412 struct siu_stream *siu_stream;
413 snd_pcm_sframes_t xfer_cnt;
414
415 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
416 siu_stream = &port_info->playback;
417 else
418 siu_stream = &port_info->capture;
419
420 rt = siu_stream->substream->runtime;
421
422 siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
423 siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
424
425 dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
426 info->port_id, rt->channels, siu_stream->period_bytes);
427
428 /* We only support buffers that are multiples of the period */
429 if (siu_stream->buf_bytes % siu_stream->period_bytes) {
430 dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
431 __func__, siu_stream->buf_bytes,
432 siu_stream->period_bytes);
433 return -EINVAL;
434 }
435
436 xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
437 if (!xfer_cnt || xfer_cnt > 0x1000000)
438 return -EINVAL;
439
440 siu_stream->format = rt->format;
441 siu_stream->xfer_cnt = xfer_cnt;
442
443 dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
444 "format=%d channels=%d xfer_cnt=%d\n", info->port_id,
445 (unsigned long)rt->dma_addr, siu_stream->buf_bytes,
446 siu_stream->period_bytes,
447 siu_stream->format, rt->channels, (int)xfer_cnt);
448
449 return 0;
450}
451
452static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
453{
454 struct siu_info *info = siu_i2s_dai.private_data;
455 struct device *dev = ss->pcm->card->dev;
456 struct siu_port *port_info = siu_port_info(ss);
457 int ret;
458
459 dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
460 info->port_id, port_info, cmd);
461
462 switch (cmd) {
463 case SNDRV_PCM_TRIGGER_START:
464 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
465 ret = siu_pcm_stmwrite_start(port_info);
466 else
467 ret = siu_pcm_stmread_start(port_info);
468
469 if (ret < 0)
470 dev_warn(dev, "%s: start failed on port=%d\n",
471 __func__, info->port_id);
472
473 break;
474 case SNDRV_PCM_TRIGGER_STOP:
475 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
476 siu_pcm_stmwrite_stop(port_info);
477 else
478 siu_pcm_stmread_stop(port_info);
479 ret = 0;
480
481 break;
482 default:
483 dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
484 ret = -EINVAL;
485 }
486
487 return ret;
488}
489
490/*
491 * So far only resolution of one period is supported, subject to extending the
492 * dmangine API
493 */
494static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
495{
496 struct device *dev = ss->pcm->card->dev;
497 struct siu_info *info = siu_i2s_dai.private_data;
498 u32 __iomem *base = info->reg;
499 struct siu_port *port_info = siu_port_info(ss);
500 struct snd_pcm_runtime *rt = ss->runtime;
501 size_t ptr;
502 struct siu_stream *siu_stream;
503
504 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
505 siu_stream = &port_info->playback;
506 else
507 siu_stream = &port_info->capture;
508
509 /*
510 * ptr is the offset into the buffer where the dma is currently at. We
511 * check if the dma buffer has just wrapped.
512 */
513 ptr = PERIOD_OFFSET(rt->dma_addr,
514 siu_stream->cur_period,
515 siu_stream->period_bytes) - rt->dma_addr;
516
517 dev_dbg(dev,
518 "%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
519 __func__, info->port_id, siu_read32(base + SIU_EVNTC),
520 siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
521 siu_stream->cookie);
522
523 if (ptr >= siu_stream->buf_bytes)
524 ptr = 0;
525
526 return bytes_to_frames(ss->runtime, ptr);
527}
528
529static int siu_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
530 struct snd_pcm *pcm)
531{
532 /* card->dev == socdev->dev, see snd_soc_new_pcms() */
533 struct siu_info *info = siu_i2s_dai.private_data;
534 struct platform_device *pdev = to_platform_device(card->dev);
535 int ret;
536 int i;
537
538 /* pdev->id selects between SIUA and SIUB */
539 if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM)
540 return -EINVAL;
541
542 info->port_id = pdev->id;
543
544 /*
545 * While the siu has 2 ports, only one port can be on at a time (only 1
546 * SPB). So far all the boards using the siu had only one of the ports
547 * wired to a codec. To simplify things, we only register one port with
548 * alsa. In case both ports are needed, it should be changed here
549 */
550 for (i = pdev->id; i < pdev->id + 1; i++) {
551 struct siu_port **port_info = &siu_ports[i];
552
553 ret = siu_init_port(i, port_info, card);
554 if (ret < 0)
555 return ret;
556
557 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
558 SNDRV_DMA_TYPE_DEV, NULL,
559 SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX);
560 if (ret < 0) {
561 dev_err(card->dev,
562 "snd_pcm_lib_preallocate_pages_for_all() err=%d",
563 ret);
564 goto fail;
565 }
566
567 (*port_info)->pcm = pcm;
568
569 /* IO tasklets */
570 tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
571 (unsigned long)&(*port_info)->playback);
572 tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
573 (unsigned long)&(*port_info)->capture);
574 }
575
576 dev_info(card->dev, "SuperH SIU driver initialized.\n");
577 return 0;
578
579fail:
580 siu_free_port(siu_ports[pdev->id]);
581 dev_err(card->dev, "SIU: failed to initialize.\n");
582 return ret;
583}
584
585static void siu_pcm_free(struct snd_pcm *pcm)
586{
587 struct platform_device *pdev = to_platform_device(pcm->card->dev);
588 struct siu_port *port_info = siu_ports[pdev->id];
589
590 tasklet_kill(&port_info->capture.tasklet);
591 tasklet_kill(&port_info->playback.tasklet);
592
593 siu_free_port(port_info);
594 snd_pcm_lib_preallocate_free_for_all(pcm);
595
596 dev_dbg(pcm->card->dev, "%s\n", __func__);
597}
598
599static struct snd_pcm_ops siu_pcm_ops = {
600 .open = siu_pcm_open,
601 .close = siu_pcm_close,
602 .ioctl = snd_pcm_lib_ioctl,
603 .hw_params = siu_pcm_hw_params,
604 .hw_free = siu_pcm_hw_free,
605 .prepare = siu_pcm_prepare,
606 .trigger = siu_pcm_trigger,
607 .pointer = siu_pcm_pointer_dma,
608};
609
610struct snd_soc_platform siu_platform = {
611 .name = "siu-audio",
612 .pcm_ops = &siu_pcm_ops,
613 .pcm_new = siu_pcm_new,
614 .pcm_free = siu_pcm_free,
615};
616EXPORT_SYMBOL_GPL(siu_platform);