~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/sh/siu_pcm.c

Version: ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 28 #include <sound/control.h>
 29 #include <sound/core.h>
 30 #include <sound/pcm.h>
 31 #include <sound/pcm_params.h>
 32 #include <sound/soc.h>
 33 
 34 #include <asm/siu.h>
 35 
 36 #include "siu.h"
 37 
 38 #define DRV_NAME "siu-i2s"
 39 #define GET_MAX_PERIODS(buf_bytes, period_bytes) \
 40                                 ((buf_bytes) / (period_bytes))
 41 #define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
 42                                 ((buf_addr) + ((period_num) * (period_bytes)))
 43 
 44 #define RWF_STM_RD              0x01            /* Read in progress */
 45 #define RWF_STM_WT              0x02            /* Write in progress */
 46 
 47 struct siu_port *siu_ports[SIU_PORT_NUM];
 48 
 49 /* transfersize is number of u32 dma transfers per period */
 50 static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
 51 {
 52         struct siu_info *info = siu_i2s_data;
 53         u32 __iomem *base = info->reg;
 54         struct siu_stream *siu_stream = &port_info->playback;
 55         u32 stfifo;
 56 
 57         if (!siu_stream->rw_flg)
 58                 return -EPERM;
 59 
 60         /* output FIFO disable */
 61         stfifo = siu_read32(base + SIU_STFIFO);
 62         siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
 63         pr_debug("%s: STFIFO %x -> %x\n", __func__,
 64                  stfifo, stfifo & ~0x0c180c18);
 65 
 66         /* during stmwrite clear */
 67         siu_stream->rw_flg = 0;
 68 
 69         return 0;
 70 }
 71 
 72 static int siu_pcm_stmwrite_start(struct siu_port *port_info)
 73 {
 74         struct siu_stream *siu_stream = &port_info->playback;
 75 
 76         if (siu_stream->rw_flg)
 77                 return -EPERM;
 78 
 79         /* Current period in buffer */
 80         port_info->playback.cur_period = 0;
 81 
 82         /* during stmwrite flag set */
 83         siu_stream->rw_flg = RWF_STM_WT;
 84 
 85         /* DMA transfer start */
 86         tasklet_schedule(&siu_stream->tasklet);
 87 
 88         return 0;
 89 }
 90 
 91 static void siu_dma_tx_complete(void *arg)
 92 {
 93         struct siu_stream *siu_stream = arg;
 94 
 95         if (!siu_stream->rw_flg)
 96                 return;
 97 
 98         /* Update completed period count */
 99         if (++siu_stream->cur_period >=
100             GET_MAX_PERIODS(siu_stream->buf_bytes,
101                             siu_stream->period_bytes))
102                 siu_stream->cur_period = 0;
103 
104         pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
105                 __func__, siu_stream->cur_period,
106                 siu_stream->cur_period * siu_stream->period_bytes,
107                 siu_stream->buf_bytes, siu_stream->cookie);
108 
109         tasklet_schedule(&siu_stream->tasklet);
110 
111         /* Notify alsa: a period is done */
112         snd_pcm_period_elapsed(siu_stream->substream);
113 }
114 
115 static int siu_pcm_wr_set(struct siu_port *port_info,
116                           dma_addr_t buff, u32 size)
117 {
118         struct siu_info *info = siu_i2s_data;
119         u32 __iomem *base = info->reg;
120         struct siu_stream *siu_stream = &port_info->playback;
121         struct snd_pcm_substream *substream = siu_stream->substream;
122         struct device *dev = substream->pcm->card->dev;
123         struct dma_async_tx_descriptor *desc;
124         dma_cookie_t cookie;
125         struct scatterlist sg;
126         u32 stfifo;
127 
128         sg_init_table(&sg, 1);
129         sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
130                     size, offset_in_page(buff));
131         sg_dma_len(&sg) = size;
132         sg_dma_address(&sg) = buff;
133 
134         desc = dmaengine_prep_slave_sg(siu_stream->chan,
135                 &sg, 1, DMA_MEM_TO_DEV, 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 = dmaengine_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 
163 static 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_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_len(&sg) = size;
182         sg_dma_address(&sg) = buff;
183 
184         desc = dmaengine_prep_slave_sg(siu_stream->chan,
185                 &sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
186         if (!desc) {
187                 dev_err(dev, "Failed to allocate dma descriptor\n");
188                 return -ENOMEM;
189         }
190 
191         desc->callback = siu_dma_tx_complete;
192         desc->callback_param = siu_stream;
193         cookie = dmaengine_submit(desc);
194         if (cookie < 0) {
195                 dev_err(dev, "Failed to submit dma descriptor\n");
196                 return cookie;
197         }
198 
199         siu_stream->tx_desc = desc;
200         siu_stream->cookie = cookie;
201 
202         dma_async_issue_pending(siu_stream->chan);
203 
204         /* only input FIFO enable */
205         stfifo = siu_read32(base + SIU_STFIFO);
206         siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
207                     (port_info->stfifo & 0x13071307));
208         dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
209                 stfifo, stfifo | (port_info->stfifo & 0x13071307));
210 
211         return 0;
212 }
213 
214 static void siu_io_tasklet(unsigned long data)
215 {
216         struct siu_stream *siu_stream = (struct siu_stream *)data;
217         struct snd_pcm_substream *substream = siu_stream->substream;
218         struct device *dev = substream->pcm->card->dev;
219         struct snd_pcm_runtime *rt = substream->runtime;
220         struct siu_port *port_info = siu_port_info(substream);
221 
222         dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
223 
224         if (!siu_stream->rw_flg) {
225                 dev_dbg(dev, "%s: stream inactive\n", __func__);
226                 return;
227         }
228 
229         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
230                 dma_addr_t buff;
231                 size_t count;
232                 u8 *virt;
233 
234                 buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
235                                                 siu_stream->cur_period,
236                                                 siu_stream->period_bytes);
237                 virt = PERIOD_OFFSET(rt->dma_area,
238                                      siu_stream->cur_period,
239                                      siu_stream->period_bytes);
240                 count = siu_stream->period_bytes;
241 
242                 /* DMA transfer start */
243                 siu_pcm_rd_set(port_info, buff, count);
244         } else {
245                 siu_pcm_wr_set(port_info,
246                                (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
247                                                 siu_stream->cur_period,
248                                                 siu_stream->period_bytes),
249                                siu_stream->period_bytes);
250         }
251 }
252 
253 /* Capture */
254 static int siu_pcm_stmread_start(struct siu_port *port_info)
255 {
256         struct siu_stream *siu_stream = &port_info->capture;
257 
258         if (siu_stream->xfer_cnt > 0x1000000)
259                 return -EINVAL;
260         if (siu_stream->rw_flg)
261                 return -EPERM;
262 
263         /* Current period in buffer */
264         siu_stream->cur_period = 0;
265 
266         /* during stmread flag set */
267         siu_stream->rw_flg = RWF_STM_RD;
268 
269         tasklet_schedule(&siu_stream->tasklet);
270 
271         return 0;
272 }
273 
274 static int siu_pcm_stmread_stop(struct siu_port *port_info)
275 {
276         struct siu_info *info = siu_i2s_data;
277         u32 __iomem *base = info->reg;
278         struct siu_stream *siu_stream = &port_info->capture;
279         struct device *dev = siu_stream->substream->pcm->card->dev;
280         u32 stfifo;
281 
282         if (!siu_stream->rw_flg)
283                 return -EPERM;
284 
285         /* input FIFO disable */
286         stfifo = siu_read32(base + SIU_STFIFO);
287         siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
288         dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
289                 stfifo, stfifo & ~0x13071307);
290 
291         /* during stmread flag clear */
292         siu_stream->rw_flg = 0;
293 
294         return 0;
295 }
296 
297 static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
298                              struct snd_pcm_hw_params *hw_params)
299 {
300         struct siu_info *info = siu_i2s_data;
301         struct device *dev = ss->pcm->card->dev;
302         int ret;
303 
304         dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
305 
306         ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
307         if (ret < 0)
308                 dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
309 
310         return ret;
311 }
312 
313 static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
314 {
315         struct siu_info *info = siu_i2s_data;
316         struct siu_port *port_info = siu_port_info(ss);
317         struct device *dev = ss->pcm->card->dev;
318         struct siu_stream *siu_stream;
319 
320         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
321                 siu_stream = &port_info->playback;
322         else
323                 siu_stream = &port_info->capture;
324 
325         dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
326 
327         return snd_pcm_lib_free_pages(ss);
328 }
329 
330 static bool filter(struct dma_chan *chan, void *slave)
331 {
332         struct sh_dmae_slave *param = slave;
333 
334         pr_debug("%s: slave ID %d\n", __func__, param->shdma_slave.slave_id);
335 
336         chan->private = &param->shdma_slave;
337         return true;
338 }
339 
340 static int siu_pcm_open(struct snd_pcm_substream *ss)
341 {
342         /* Playback / Capture */
343         struct snd_soc_pcm_runtime *rtd = ss->private_data;
344         struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
345         struct siu_platform *pdata = component->dev->platform_data;
346         struct siu_info *info = siu_i2s_data;
347         struct siu_port *port_info = siu_port_info(ss);
348         struct siu_stream *siu_stream;
349         u32 port = info->port_id;
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->shdma_slave.slave_id = port ? pdata->dma_slave_tx_b :
363                         pdata->dma_slave_tx_a;
364         } else {
365                 siu_stream = &port_info->capture;
366                 param = &siu_stream->param;
367                 param->shdma_slave.slave_id = port ? pdata->dma_slave_rx_b :
368                         pdata->dma_slave_rx_a;
369         }
370 
371         /* Get DMA channel */
372         siu_stream->chan = dma_request_channel(mask, filter, param);
373         if (!siu_stream->chan) {
374                 dev_err(dev, "DMA channel allocation failed!\n");
375                 return -EBUSY;
376         }
377 
378         siu_stream->substream = ss;
379 
380         return 0;
381 }
382 
383 static int siu_pcm_close(struct snd_pcm_substream *ss)
384 {
385         struct siu_info *info = siu_i2s_data;
386         struct device *dev = ss->pcm->card->dev;
387         struct siu_port *port_info = siu_port_info(ss);
388         struct siu_stream *siu_stream;
389 
390         dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
391 
392         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
393                 siu_stream = &port_info->playback;
394         else
395                 siu_stream = &port_info->capture;
396 
397         dma_release_channel(siu_stream->chan);
398         siu_stream->chan = NULL;
399 
400         siu_stream->substream = NULL;
401 
402         return 0;
403 }
404 
405 static int siu_pcm_prepare(struct snd_pcm_substream *ss)
406 {
407         struct siu_info *info = siu_i2s_data;
408         struct siu_port *port_info = siu_port_info(ss);
409         struct device *dev = ss->pcm->card->dev;
410         struct snd_pcm_runtime  *rt = ss->runtime;
411         struct siu_stream *siu_stream;
412         snd_pcm_sframes_t xfer_cnt;
413 
414         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
415                 siu_stream = &port_info->playback;
416         else
417                 siu_stream = &port_info->capture;
418 
419         rt = siu_stream->substream->runtime;
420 
421         siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
422         siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
423 
424         dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
425                 info->port_id, rt->channels, siu_stream->period_bytes);
426 
427         /* We only support buffers that are multiples of the period */
428         if (siu_stream->buf_bytes % siu_stream->period_bytes) {
429                 dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
430                        __func__, siu_stream->buf_bytes,
431                        siu_stream->period_bytes);
432                 return -EINVAL;
433         }
434 
435         xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
436         if (!xfer_cnt || xfer_cnt > 0x1000000)
437                 return -EINVAL;
438 
439         siu_stream->format = rt->format;
440         siu_stream->xfer_cnt = xfer_cnt;
441 
442         dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
443                 "format=%d channels=%d xfer_cnt=%d\n", info->port_id,
444                 (unsigned long)rt->dma_addr, siu_stream->buf_bytes,
445                 siu_stream->period_bytes,
446                 siu_stream->format, rt->channels, (int)xfer_cnt);
447 
448         return 0;
449 }
450 
451 static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
452 {
453         struct siu_info *info = siu_i2s_data;
454         struct device *dev = ss->pcm->card->dev;
455         struct siu_port *port_info = siu_port_info(ss);
456         int ret;
457 
458         dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
459                 info->port_id, port_info, cmd);
460 
461         switch (cmd) {
462         case SNDRV_PCM_TRIGGER_START:
463                 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
464                         ret = siu_pcm_stmwrite_start(port_info);
465                 else
466                         ret = siu_pcm_stmread_start(port_info);
467 
468                 if (ret < 0)
469                         dev_warn(dev, "%s: start failed on port=%d\n",
470                                  __func__, info->port_id);
471 
472                 break;
473         case SNDRV_PCM_TRIGGER_STOP:
474                 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
475                         siu_pcm_stmwrite_stop(port_info);
476                 else
477                         siu_pcm_stmread_stop(port_info);
478                 ret = 0;
479 
480                 break;
481         default:
482                 dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
483                 ret = -EINVAL;
484         }
485 
486         return ret;
487 }
488 
489 /*
490  * So far only resolution of one period is supported, subject to extending the
491  * dmangine API
492  */
493 static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
494 {
495         struct device *dev = ss->pcm->card->dev;
496         struct siu_info *info = siu_i2s_data;
497         u32 __iomem *base = info->reg;
498         struct siu_port *port_info = siu_port_info(ss);
499         struct snd_pcm_runtime *rt = ss->runtime;
500         size_t ptr;
501         struct siu_stream *siu_stream;
502 
503         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
504                 siu_stream = &port_info->playback;
505         else
506                 siu_stream = &port_info->capture;
507 
508         /*
509          * ptr is the offset into the buffer where the dma is currently at. We
510          * check if the dma buffer has just wrapped.
511          */
512         ptr = PERIOD_OFFSET(rt->dma_addr,
513                             siu_stream->cur_period,
514                             siu_stream->period_bytes) - rt->dma_addr;
515 
516         dev_dbg(dev,
517                 "%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
518                 __func__, info->port_id, siu_read32(base + SIU_EVNTC),
519                 siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
520                 siu_stream->cookie);
521 
522         if (ptr >= siu_stream->buf_bytes)
523                 ptr = 0;
524 
525         return bytes_to_frames(ss->runtime, ptr);
526 }
527 
528 static int siu_pcm_new(struct snd_soc_pcm_runtime *rtd)
529 {
530         /* card->dev == socdev->dev, see snd_soc_new_pcms() */
531         struct snd_card *card = rtd->card->snd_card;
532         struct snd_pcm *pcm = rtd->pcm;
533         struct siu_info *info = siu_i2s_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 
579 fail:
580         siu_free_port(siu_ports[pdev->id]);
581         dev_err(card->dev, "SIU: failed to initialize.\n");
582         return ret;
583 }
584 
585 static 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 
595         dev_dbg(pcm->card->dev, "%s\n", __func__);
596 }
597 
598 static const struct snd_pcm_ops siu_pcm_ops = {
599         .open           = siu_pcm_open,
600         .close          = siu_pcm_close,
601         .ioctl          = snd_pcm_lib_ioctl,
602         .hw_params      = siu_pcm_hw_params,
603         .hw_free        = siu_pcm_hw_free,
604         .prepare        = siu_pcm_prepare,
605         .trigger        = siu_pcm_trigger,
606         .pointer        = siu_pcm_pointer_dma,
607 };
608 
609 struct snd_soc_component_driver siu_component = {
610         .name           = DRV_NAME,
611         .ops                    = &siu_pcm_ops,
612         .pcm_new        = siu_pcm_new,
613         .pcm_free       = siu_pcm_free,
614 };
615 EXPORT_SYMBOL_GPL(siu_component);
616 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp