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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / sound / soc / sh / siu_pcm.c
blobe263757e4a69153695ce6366769007339461b3b5
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // siu_pcm.c - ALSA driver for Renesas SH7343, SH7722 SIU peripheral.
4 //
5 // Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6 // Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
7
8 #include <linux/delay.h>
9 #include <linux/dma-mapping.h>
10 #include <linux/dmaengine.h>
11 #include <linux/interrupt.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14
15 #include <sound/control.h>
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20
21 #include <asm/siu.h>
22
23 #include "siu.h"
24
25 #define DRV_NAME "siu-i2s"
26 #define GET_MAX_PERIODS(buf_bytes, period_bytes) \
27 ((buf_bytes) / (period_bytes))
28 #define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
29 ((buf_addr) + ((period_num) * (period_bytes)))
30
31 #define RWF_STM_RD 0x01 /* Read in progress */
32 #define RWF_STM_WT 0x02 /* Write in progress */
33
34 struct siu_port *siu_ports[SIU_PORT_NUM];
35
36 /* transfersize is number of u32 dma transfers per period */
37 static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
38 {
39 struct siu_info *info = siu_i2s_data;
40 u32 __iomem *base = info->reg;
41 struct siu_stream *siu_stream = &port_info->playback;
42 u32 stfifo;
43
44 if (!siu_stream->rw_flg)
45 return -EPERM;
46
47 /* output FIFO disable */
48 stfifo = siu_read32(base + SIU_STFIFO);
49 siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
50 pr_debug("%s: STFIFO %x -> %x\n", __func__,
51 stfifo, stfifo & ~0x0c180c18);
52
53 /* during stmwrite clear */
54 siu_stream->rw_flg = 0;
55
56 return 0;
57 }
58
59 static int siu_pcm_stmwrite_start(struct siu_port *port_info)
60 {
61 struct siu_stream *siu_stream = &port_info->playback;
62
63 if (siu_stream->rw_flg)
64 return -EPERM;
65
66 /* Current period in buffer */
67 port_info->playback.cur_period = 0;
68
69 /* during stmwrite flag set */
70 siu_stream->rw_flg = RWF_STM_WT;
71
72 /* DMA transfer start */
73 tasklet_schedule(&siu_stream->tasklet);
74
75 return 0;
76 }
77
78 static void siu_dma_tx_complete(void *arg)
79 {
80 struct siu_stream *siu_stream = arg;
81
82 if (!siu_stream->rw_flg)
83 return;
84
85 /* Update completed period count */
86 if (++siu_stream->cur_period >=
87 GET_MAX_PERIODS(siu_stream->buf_bytes,
88 siu_stream->period_bytes))
89 siu_stream->cur_period = 0;
90
91 pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
92 __func__, siu_stream->cur_period,
93 siu_stream->cur_period * siu_stream->period_bytes,
94 siu_stream->buf_bytes, siu_stream->cookie);
95
96 tasklet_schedule(&siu_stream->tasklet);
97
98 /* Notify alsa: a period is done */
99 snd_pcm_period_elapsed(siu_stream->substream);
100 }
101
102 static int siu_pcm_wr_set(struct siu_port *port_info,
103 dma_addr_t buff, u32 size)
104 {
105 struct siu_info *info = siu_i2s_data;
106 u32 __iomem *base = info->reg;
107 struct siu_stream *siu_stream = &port_info->playback;
108 struct snd_pcm_substream *substream = siu_stream->substream;
109 struct device *dev = substream->pcm->card->dev;
110 struct dma_async_tx_descriptor *desc;
111 dma_cookie_t cookie;
112 struct scatterlist sg;
113 u32 stfifo;
114
115 sg_init_table(&sg, 1);
116 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
117 size, offset_in_page(buff));
118 sg_dma_len(&sg) = size;
119 sg_dma_address(&sg) = buff;
120
121 desc = dmaengine_prep_slave_sg(siu_stream->chan,
122 &sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
123 if (!desc) {
124 dev_err(dev, "Failed to allocate a dma descriptor\n");
125 return -ENOMEM;
126 }
127
128 desc->callback = siu_dma_tx_complete;
129 desc->callback_param = siu_stream;
130 cookie = dmaengine_submit(desc);
131 if (cookie < 0) {
132 dev_err(dev, "Failed to submit a dma transfer\n");
133 return cookie;
134 }
135
136 siu_stream->tx_desc = desc;
137 siu_stream->cookie = cookie;
138
139 dma_async_issue_pending(siu_stream->chan);
140
141 /* only output FIFO enable */
142 stfifo = siu_read32(base + SIU_STFIFO);
143 siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18));
144 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
145 stfifo, stfifo | (port_info->stfifo & 0x0c180c18));
146
147 return 0;
148 }
149
150 static int siu_pcm_rd_set(struct siu_port *port_info,
151 dma_addr_t buff, size_t size)
152 {
153 struct siu_info *info = siu_i2s_data;
154 u32 __iomem *base = info->reg;
155 struct siu_stream *siu_stream = &port_info->capture;
156 struct snd_pcm_substream *substream = siu_stream->substream;
157 struct device *dev = substream->pcm->card->dev;
158 struct dma_async_tx_descriptor *desc;
159 dma_cookie_t cookie;
160 struct scatterlist sg;
161 u32 stfifo;
162
163 dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff);
164
165 sg_init_table(&sg, 1);
166 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
167 size, offset_in_page(buff));
168 sg_dma_len(&sg) = size;
169 sg_dma_address(&sg) = buff;
170
171 desc = dmaengine_prep_slave_sg(siu_stream->chan,
172 &sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
173 if (!desc) {
174 dev_err(dev, "Failed to allocate dma descriptor\n");
175 return -ENOMEM;
176 }
177
178 desc->callback = siu_dma_tx_complete;
179 desc->callback_param = siu_stream;
180 cookie = dmaengine_submit(desc);
181 if (cookie < 0) {
182 dev_err(dev, "Failed to submit dma descriptor\n");
183 return cookie;
184 }
185
186 siu_stream->tx_desc = desc;
187 siu_stream->cookie = cookie;
188
189 dma_async_issue_pending(siu_stream->chan);
190
191 /* only input FIFO enable */
192 stfifo = siu_read32(base + SIU_STFIFO);
193 siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
194 (port_info->stfifo & 0x13071307));
195 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
196 stfifo, stfifo | (port_info->stfifo & 0x13071307));
197
198 return 0;
199 }
200
201 static void siu_io_tasklet(unsigned long data)
202 {
203 struct siu_stream *siu_stream = (struct siu_stream *)data;
204 struct snd_pcm_substream *substream = siu_stream->substream;
205 struct device *dev = substream->pcm->card->dev;
206 struct snd_pcm_runtime *rt = substream->runtime;
207 struct siu_port *port_info = siu_port_info(substream);
208
209 dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
210
211 if (!siu_stream->rw_flg) {
212 dev_dbg(dev, "%s: stream inactive\n", __func__);
213 return;
214 }
215
216 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
217 dma_addr_t buff;
218 size_t count;
219 u8 *virt;
220
221 buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
222 siu_stream->cur_period,
223 siu_stream->period_bytes);
224 virt = PERIOD_OFFSET(rt->dma_area,
225 siu_stream->cur_period,
226 siu_stream->period_bytes);
227 count = siu_stream->period_bytes;
228
229 /* DMA transfer start */
230 siu_pcm_rd_set(port_info, buff, count);
231 } else {
232 siu_pcm_wr_set(port_info,
233 (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
234 siu_stream->cur_period,
235 siu_stream->period_bytes),
236 siu_stream->period_bytes);
237 }
238 }
239
240 /* Capture */
241 static int siu_pcm_stmread_start(struct siu_port *port_info)
242 {
243 struct siu_stream *siu_stream = &port_info->capture;
244
245 if (siu_stream->xfer_cnt > 0x1000000)
246 return -EINVAL;
247 if (siu_stream->rw_flg)
248 return -EPERM;
249
250 /* Current period in buffer */
251 siu_stream->cur_period = 0;
252
253 /* during stmread flag set */
254 siu_stream->rw_flg = RWF_STM_RD;
255
256 tasklet_schedule(&siu_stream->tasklet);
257
258 return 0;
259 }
260
261 static int siu_pcm_stmread_stop(struct siu_port *port_info)
262 {
263 struct siu_info *info = siu_i2s_data;
264 u32 __iomem *base = info->reg;
265 struct siu_stream *siu_stream = &port_info->capture;
266 struct device *dev = siu_stream->substream->pcm->card->dev;
267 u32 stfifo;
268
269 if (!siu_stream->rw_flg)
270 return -EPERM;
271
272 /* input FIFO disable */
273 stfifo = siu_read32(base + SIU_STFIFO);
274 siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
275 dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
276 stfifo, stfifo & ~0x13071307);
277
278 /* during stmread flag clear */
279 siu_stream->rw_flg = 0;
280
281 return 0;
282 }
283
284 static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
285 struct snd_pcm_hw_params *hw_params)
286 {
287 struct siu_info *info = siu_i2s_data;
288 struct device *dev = ss->pcm->card->dev;
289 int ret;
290
291 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
292
293 ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
294 if (ret < 0)
295 dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
296
297 return ret;
298 }
299
300 static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
301 {
302 struct siu_info *info = siu_i2s_data;
303 struct siu_port *port_info = siu_port_info(ss);
304 struct device *dev = ss->pcm->card->dev;
305 struct siu_stream *siu_stream;
306
307 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
308 siu_stream = &port_info->playback;
309 else
310 siu_stream = &port_info->capture;
311
312 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
313
314 return snd_pcm_lib_free_pages(ss);
315 }
316
317 static bool filter(struct dma_chan *chan, void *slave)
318 {
319 struct sh_dmae_slave *param = slave;
320
321 pr_debug("%s: slave ID %d\n", __func__, param->shdma_slave.slave_id);
322
323 chan->private = &param->shdma_slave;
324 return true;
325 }
326
327 static int siu_pcm_open(struct snd_pcm_substream *ss)
328 {
329 /* Playback / Capture */
330 struct snd_soc_pcm_runtime *rtd = ss->private_data;
331 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
332 struct siu_platform *pdata = component->dev->platform_data;
333 struct siu_info *info = siu_i2s_data;
334 struct siu_port *port_info = siu_port_info(ss);
335 struct siu_stream *siu_stream;
336 u32 port = info->port_id;
337 struct device *dev = ss->pcm->card->dev;
338 dma_cap_mask_t mask;
339 struct sh_dmae_slave *param;
340
341 dma_cap_zero(mask);
342 dma_cap_set(DMA_SLAVE, mask);
343
344 dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info);
345
346 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) {
347 siu_stream = &port_info->playback;
348 param = &siu_stream->param;
349 param->shdma_slave.slave_id = port ? pdata->dma_slave_tx_b :
350 pdata->dma_slave_tx_a;
351 } else {
352 siu_stream = &port_info->capture;
353 param = &siu_stream->param;
354 param->shdma_slave.slave_id = port ? pdata->dma_slave_rx_b :
355 pdata->dma_slave_rx_a;
356 }
357
358 /* Get DMA channel */
359 siu_stream->chan = dma_request_channel(mask, filter, param);
360 if (!siu_stream->chan) {
361 dev_err(dev, "DMA channel allocation failed!\n");
362 return -EBUSY;
363 }
364
365 siu_stream->substream = ss;
366
367 return 0;
368 }
369
370 static int siu_pcm_close(struct snd_pcm_substream *ss)
371 {
372 struct siu_info *info = siu_i2s_data;
373 struct device *dev = ss->pcm->card->dev;
374 struct siu_port *port_info = siu_port_info(ss);
375 struct siu_stream *siu_stream;
376
377 dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
378
379 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
380 siu_stream = &port_info->playback;
381 else
382 siu_stream = &port_info->capture;
383
384 dma_release_channel(siu_stream->chan);
385 siu_stream->chan = NULL;
386
387 siu_stream->substream = NULL;
388
389 return 0;
390 }
391
392 static int siu_pcm_prepare(struct snd_pcm_substream *ss)
393 {
394 struct siu_info *info = siu_i2s_data;
395 struct siu_port *port_info = siu_port_info(ss);
396 struct device *dev = ss->pcm->card->dev;
397 struct snd_pcm_runtime *rt = ss->runtime;
398 struct siu_stream *siu_stream;
399 snd_pcm_sframes_t xfer_cnt;
400
401 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
402 siu_stream = &port_info->playback;
403 else
404 siu_stream = &port_info->capture;
405
406 rt = siu_stream->substream->runtime;
407
408 siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
409 siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
410
411 dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
412 info->port_id, rt->channels, siu_stream->period_bytes);
413
414 /* We only support buffers that are multiples of the period */
415 if (siu_stream->buf_bytes % siu_stream->period_bytes) {
416 dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
417 __func__, siu_stream->buf_bytes,
418 siu_stream->period_bytes);
419 return -EINVAL;
420 }
421
422 xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
423 if (!xfer_cnt || xfer_cnt > 0x1000000)
424 return -EINVAL;
425
426 siu_stream->format = rt->format;
427 siu_stream->xfer_cnt = xfer_cnt;
428
429 dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
430 "format=%d channels=%d xfer_cnt=%d\n", info->port_id,
431 (unsigned long)rt->dma_addr, siu_stream->buf_bytes,
432 siu_stream->period_bytes,
433 siu_stream->format, rt->channels, (int)xfer_cnt);
434
435 return 0;
436 }
437
438 static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
439 {
440 struct siu_info *info = siu_i2s_data;
441 struct device *dev = ss->pcm->card->dev;
442 struct siu_port *port_info = siu_port_info(ss);
443 int ret;
444
445 dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
446 info->port_id, port_info, cmd);
447
448 switch (cmd) {
449 case SNDRV_PCM_TRIGGER_START:
450 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
451 ret = siu_pcm_stmwrite_start(port_info);
452 else
453 ret = siu_pcm_stmread_start(port_info);
454
455 if (ret < 0)
456 dev_warn(dev, "%s: start failed on port=%d\n",
457 __func__, info->port_id);
458
459 break;
460 case SNDRV_PCM_TRIGGER_STOP:
461 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
462 siu_pcm_stmwrite_stop(port_info);
463 else
464 siu_pcm_stmread_stop(port_info);
465 ret = 0;
466
467 break;
468 default:
469 dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
470 ret = -EINVAL;
471 }
472
473 return ret;
474 }
475
476 /*
477 * So far only resolution of one period is supported, subject to extending the
478 * dmangine API
479 */
480 static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
481 {
482 struct device *dev = ss->pcm->card->dev;
483 struct siu_info *info = siu_i2s_data;
484 u32 __iomem *base = info->reg;
485 struct siu_port *port_info = siu_port_info(ss);
486 struct snd_pcm_runtime *rt = ss->runtime;
487 size_t ptr;
488 struct siu_stream *siu_stream;
489
490 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
491 siu_stream = &port_info->playback;
492 else
493 siu_stream = &port_info->capture;
494
495 /*
496 * ptr is the offset into the buffer where the dma is currently at. We
497 * check if the dma buffer has just wrapped.
498 */
499 ptr = PERIOD_OFFSET(rt->dma_addr,
500 siu_stream->cur_period,
501 siu_stream->period_bytes) - rt->dma_addr;
502
503 dev_dbg(dev,
504 "%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
505 __func__, info->port_id, siu_read32(base + SIU_EVNTC),
506 siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
507 siu_stream->cookie);
508
509 if (ptr >= siu_stream->buf_bytes)
510 ptr = 0;
511
512 return bytes_to_frames(ss->runtime, ptr);
513 }
514
515 static int siu_pcm_new(struct snd_soc_pcm_runtime *rtd)
516 {
517 /* card->dev == socdev->dev, see snd_soc_new_pcms() */
518 struct snd_card *card = rtd->card->snd_card;
519 struct snd_pcm *pcm = rtd->pcm;
520 struct siu_info *info = siu_i2s_data;
521 struct platform_device *pdev = to_platform_device(card->dev);
522 int ret;
523 int i;
524
525 /* pdev->id selects between SIUA and SIUB */
526 if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM)
527 return -EINVAL;
528
529 info->port_id = pdev->id;
530
531 /*
532 * While the siu has 2 ports, only one port can be on at a time (only 1
533 * SPB). So far all the boards using the siu had only one of the ports
534 * wired to a codec. To simplify things, we only register one port with
535 * alsa. In case both ports are needed, it should be changed here
536 */
537 for (i = pdev->id; i < pdev->id + 1; i++) {
538 struct siu_port **port_info = &siu_ports[i];
539
540 ret = siu_init_port(i, port_info, card);
541 if (ret < 0)
542 return ret;
543
544 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
545 SNDRV_DMA_TYPE_DEV, NULL,
546 SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX);
547 if (ret < 0) {
548 dev_err(card->dev,
549 "snd_pcm_lib_preallocate_pages_for_all() err=%d",
550 ret);
551 goto fail;
552 }
553
554 (*port_info)->pcm = pcm;
555
556 /* IO tasklets */
557 tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
558 (unsigned long)&(*port_info)->playback);
559 tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
560 (unsigned long)&(*port_info)->capture);
561 }
562
563 dev_info(card->dev, "SuperH SIU driver initialized.\n");
564 return 0;
565
566 fail:
567 siu_free_port(siu_ports[pdev->id]);
568 dev_err(card->dev, "SIU: failed to initialize.\n");
569 return ret;
570 }
571
572 static void siu_pcm_free(struct snd_pcm *pcm)
573 {
574 struct platform_device *pdev = to_platform_device(pcm->card->dev);
575 struct siu_port *port_info = siu_ports[pdev->id];
576
577 tasklet_kill(&port_info->capture.tasklet);
578 tasklet_kill(&port_info->playback.tasklet);
579
580 siu_free_port(port_info);
581
582 dev_dbg(pcm->card->dev, "%s\n", __func__);
583 }
584
585 static const struct snd_pcm_ops siu_pcm_ops = {
586 .open = siu_pcm_open,
587 .close = siu_pcm_close,
588 .ioctl = snd_pcm_lib_ioctl,
589 .hw_params = siu_pcm_hw_params,
590 .hw_free = siu_pcm_hw_free,
591 .prepare = siu_pcm_prepare,
592 .trigger = siu_pcm_trigger,
593 .pointer = siu_pcm_pointer_dma,
594 };
595
596 struct snd_soc_component_driver siu_component = {
597 .name = DRV_NAME,
598 .ops = &siu_pcm_ops,
599 .pcm_new = siu_pcm_new,
600 .pcm_free = siu_pcm_free,
601 };
602 EXPORT_SYMBOL_GPL(siu_component);
(deprecated) Btrfs devel tree