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895d4509 GL |
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> | |
895d4509 GL |
27 | |
28 | #include <sound/control.h> | |
29 | #include <sound/core.h> | |
30 | #include <sound/pcm.h> | |
31 | #include <sound/pcm_params.h> | |
0d911bae | 32 | #include <sound/soc.h> |
895d4509 | 33 | |
895d4509 GL |
34 | #include <asm/siu.h> |
35 | ||
36 | #include "siu.h" | |
37 | ||
38 | #define GET_MAX_PERIODS(buf_bytes, period_bytes) \ | |
39 | ((buf_bytes) / (period_bytes)) | |
40 | #define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \ | |
41 | ((buf_addr) + ((period_num) * (period_bytes))) | |
42 | ||
43 | #define RWF_STM_RD 0x01 /* Read in progress */ | |
44 | #define RWF_STM_WT 0x02 /* Write in progress */ | |
45 | ||
46 | struct siu_port *siu_ports[SIU_PORT_NUM]; | |
47 | ||
48 | /* transfersize is number of u32 dma transfers per period */ | |
49 | static int siu_pcm_stmwrite_stop(struct siu_port *port_info) | |
50 | { | |
f0fba2ad | 51 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
52 | u32 __iomem *base = info->reg; |
53 | struct siu_stream *siu_stream = &port_info->playback; | |
54 | u32 stfifo; | |
55 | ||
56 | if (!siu_stream->rw_flg) | |
57 | return -EPERM; | |
58 | ||
59 | /* output FIFO disable */ | |
60 | stfifo = siu_read32(base + SIU_STFIFO); | |
61 | siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18); | |
62 | pr_debug("%s: STFIFO %x -> %x\n", __func__, | |
63 | stfifo, stfifo & ~0x0c180c18); | |
64 | ||
65 | /* during stmwrite clear */ | |
66 | siu_stream->rw_flg = 0; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static int siu_pcm_stmwrite_start(struct siu_port *port_info) | |
72 | { | |
73 | struct siu_stream *siu_stream = &port_info->playback; | |
74 | ||
75 | if (siu_stream->rw_flg) | |
76 | return -EPERM; | |
77 | ||
78 | /* Current period in buffer */ | |
79 | port_info->playback.cur_period = 0; | |
80 | ||
81 | /* during stmwrite flag set */ | |
82 | siu_stream->rw_flg = RWF_STM_WT; | |
83 | ||
84 | /* DMA transfer start */ | |
85 | tasklet_schedule(&siu_stream->tasklet); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | static void siu_dma_tx_complete(void *arg) | |
91 | { | |
92 | struct siu_stream *siu_stream = arg; | |
93 | ||
94 | if (!siu_stream->rw_flg) | |
95 | return; | |
96 | ||
97 | /* Update completed period count */ | |
98 | if (++siu_stream->cur_period >= | |
99 | GET_MAX_PERIODS(siu_stream->buf_bytes, | |
100 | siu_stream->period_bytes)) | |
101 | siu_stream->cur_period = 0; | |
102 | ||
103 | pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n", | |
104 | __func__, siu_stream->cur_period, | |
105 | siu_stream->cur_period * siu_stream->period_bytes, | |
106 | siu_stream->buf_bytes, siu_stream->cookie); | |
107 | ||
108 | tasklet_schedule(&siu_stream->tasklet); | |
109 | ||
110 | /* Notify alsa: a period is done */ | |
111 | snd_pcm_period_elapsed(siu_stream->substream); | |
112 | } | |
113 | ||
114 | static int siu_pcm_wr_set(struct siu_port *port_info, | |
115 | dma_addr_t buff, u32 size) | |
116 | { | |
f0fba2ad | 117 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
118 | u32 __iomem *base = info->reg; |
119 | struct siu_stream *siu_stream = &port_info->playback; | |
120 | struct snd_pcm_substream *substream = siu_stream->substream; | |
121 | struct device *dev = substream->pcm->card->dev; | |
122 | struct dma_async_tx_descriptor *desc; | |
123 | dma_cookie_t cookie; | |
124 | struct scatterlist sg; | |
125 | u32 stfifo; | |
126 | ||
127 | sg_init_table(&sg, 1); | |
128 | sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)), | |
129 | size, offset_in_page(buff)); | |
7b42176a | 130 | sg_dma_len(&sg) = size; |
895d4509 GL |
131 | sg_dma_address(&sg) = buff; |
132 | ||
16052827 | 133 | desc = dmaengine_prep_slave_sg(siu_stream->chan, |
35e16581 | 134 | &sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
895d4509 GL |
135 | if (!desc) { |
136 | dev_err(dev, "Failed to allocate a dma descriptor\n"); | |
137 | return -ENOMEM; | |
138 | } | |
139 | ||
140 | desc->callback = siu_dma_tx_complete; | |
141 | desc->callback_param = siu_stream; | |
142 | cookie = desc->tx_submit(desc); | |
143 | if (cookie < 0) { | |
144 | dev_err(dev, "Failed to submit a dma transfer\n"); | |
145 | return cookie; | |
146 | } | |
147 | ||
148 | siu_stream->tx_desc = desc; | |
149 | siu_stream->cookie = cookie; | |
150 | ||
151 | dma_async_issue_pending(siu_stream->chan); | |
152 | ||
153 | /* only output FIFO enable */ | |
154 | stfifo = siu_read32(base + SIU_STFIFO); | |
155 | siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18)); | |
156 | dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__, | |
157 | stfifo, stfifo | (port_info->stfifo & 0x0c180c18)); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int siu_pcm_rd_set(struct siu_port *port_info, | |
163 | dma_addr_t buff, size_t size) | |
164 | { | |
f0fba2ad | 165 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
166 | u32 __iomem *base = info->reg; |
167 | struct siu_stream *siu_stream = &port_info->capture; | |
168 | struct snd_pcm_substream *substream = siu_stream->substream; | |
169 | struct device *dev = substream->pcm->card->dev; | |
170 | struct dma_async_tx_descriptor *desc; | |
171 | dma_cookie_t cookie; | |
172 | struct scatterlist sg; | |
173 | u32 stfifo; | |
174 | ||
175 | dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff); | |
176 | ||
177 | sg_init_table(&sg, 1); | |
178 | sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)), | |
179 | size, offset_in_page(buff)); | |
7b42176a | 180 | sg_dma_len(&sg) = size; |
895d4509 GL |
181 | sg_dma_address(&sg) = buff; |
182 | ||
16052827 | 183 | desc = dmaengine_prep_slave_sg(siu_stream->chan, |
35e16581 | 184 | &sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
895d4509 GL |
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 | ||
213 | static 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 */ | |
253 | static 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 | ||
273 | static int siu_pcm_stmread_stop(struct siu_port *port_info) | |
274 | { | |
f0fba2ad | 275 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
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 | ||
296 | static int siu_pcm_hw_params(struct snd_pcm_substream *ss, | |
297 | struct snd_pcm_hw_params *hw_params) | |
298 | { | |
f0fba2ad | 299 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
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 | ||
312 | static int siu_pcm_hw_free(struct snd_pcm_substream *ss) | |
313 | { | |
f0fba2ad | 314 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
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 | ||
329 | static 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 | ||
342 | static int siu_pcm_open(struct snd_pcm_substream *ss) | |
343 | { | |
344 | /* Playback / Capture */ | |
f0fba2ad | 345 | struct snd_soc_pcm_runtime *rtd = ss->private_data; |
c6834dd2 | 346 | struct siu_platform *pdata = rtd->platform->dev->platform_data; |
f0fba2ad | 347 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
348 | struct siu_port *port_info = siu_port_info(ss); |
349 | struct siu_stream *siu_stream; | |
350 | u32 port = info->port_id; | |
895d4509 GL |
351 | struct device *dev = ss->pcm->card->dev; |
352 | dma_cap_mask_t mask; | |
353 | struct sh_dmae_slave *param; | |
354 | ||
355 | dma_cap_zero(mask); | |
356 | dma_cap_set(DMA_SLAVE, mask); | |
357 | ||
358 | dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info); | |
359 | ||
360 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
361 | siu_stream = &port_info->playback; | |
362 | param = &siu_stream->param; | |
10440af1 GL |
363 | param->slave_id = port ? pdata->dma_slave_tx_b : |
364 | pdata->dma_slave_tx_a; | |
895d4509 GL |
365 | } else { |
366 | siu_stream = &port_info->capture; | |
367 | param = &siu_stream->param; | |
10440af1 GL |
368 | param->slave_id = port ? pdata->dma_slave_rx_b : |
369 | pdata->dma_slave_rx_a; | |
895d4509 GL |
370 | } |
371 | ||
372 | param->dma_dev = pdata->dma_dev; | |
373 | /* Get DMA channel */ | |
374 | siu_stream->chan = dma_request_channel(mask, filter, param); | |
375 | if (!siu_stream->chan) { | |
376 | dev_err(dev, "DMA channel allocation failed!\n"); | |
377 | return -EBUSY; | |
378 | } | |
379 | ||
380 | siu_stream->substream = ss; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static int siu_pcm_close(struct snd_pcm_substream *ss) | |
386 | { | |
f0fba2ad | 387 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
388 | struct device *dev = ss->pcm->card->dev; |
389 | struct siu_port *port_info = siu_port_info(ss); | |
390 | struct siu_stream *siu_stream; | |
391 | ||
392 | dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id); | |
393 | ||
394 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
395 | siu_stream = &port_info->playback; | |
396 | else | |
397 | siu_stream = &port_info->capture; | |
398 | ||
399 | dma_release_channel(siu_stream->chan); | |
400 | siu_stream->chan = NULL; | |
401 | ||
402 | siu_stream->substream = NULL; | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static int siu_pcm_prepare(struct snd_pcm_substream *ss) | |
408 | { | |
f0fba2ad | 409 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
410 | struct siu_port *port_info = siu_port_info(ss); |
411 | struct device *dev = ss->pcm->card->dev; | |
412 | struct snd_pcm_runtime *rt = ss->runtime; | |
413 | struct siu_stream *siu_stream; | |
414 | snd_pcm_sframes_t xfer_cnt; | |
415 | ||
416 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
417 | siu_stream = &port_info->playback; | |
418 | else | |
419 | siu_stream = &port_info->capture; | |
420 | ||
421 | rt = siu_stream->substream->runtime; | |
422 | ||
423 | siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss); | |
424 | siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss); | |
425 | ||
426 | dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__, | |
427 | info->port_id, rt->channels, siu_stream->period_bytes); | |
428 | ||
429 | /* We only support buffers that are multiples of the period */ | |
430 | if (siu_stream->buf_bytes % siu_stream->period_bytes) { | |
431 | dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n", | |
432 | __func__, siu_stream->buf_bytes, | |
433 | siu_stream->period_bytes); | |
434 | return -EINVAL; | |
435 | } | |
436 | ||
437 | xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes); | |
438 | if (!xfer_cnt || xfer_cnt > 0x1000000) | |
439 | return -EINVAL; | |
440 | ||
441 | siu_stream->format = rt->format; | |
442 | siu_stream->xfer_cnt = xfer_cnt; | |
443 | ||
444 | dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d " | |
445 | "format=%d channels=%d xfer_cnt=%d\n", info->port_id, | |
446 | (unsigned long)rt->dma_addr, siu_stream->buf_bytes, | |
447 | siu_stream->period_bytes, | |
448 | siu_stream->format, rt->channels, (int)xfer_cnt); | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd) | |
454 | { | |
f0fba2ad | 455 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
456 | struct device *dev = ss->pcm->card->dev; |
457 | struct siu_port *port_info = siu_port_info(ss); | |
458 | int ret; | |
459 | ||
460 | dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__, | |
461 | info->port_id, port_info, cmd); | |
462 | ||
463 | switch (cmd) { | |
464 | case SNDRV_PCM_TRIGGER_START: | |
465 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
466 | ret = siu_pcm_stmwrite_start(port_info); | |
467 | else | |
468 | ret = siu_pcm_stmread_start(port_info); | |
469 | ||
470 | if (ret < 0) | |
471 | dev_warn(dev, "%s: start failed on port=%d\n", | |
472 | __func__, info->port_id); | |
473 | ||
474 | break; | |
475 | case SNDRV_PCM_TRIGGER_STOP: | |
476 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
477 | siu_pcm_stmwrite_stop(port_info); | |
478 | else | |
479 | siu_pcm_stmread_stop(port_info); | |
480 | ret = 0; | |
481 | ||
482 | break; | |
483 | default: | |
484 | dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd); | |
485 | ret = -EINVAL; | |
486 | } | |
487 | ||
488 | return ret; | |
489 | } | |
490 | ||
491 | /* | |
492 | * So far only resolution of one period is supported, subject to extending the | |
493 | * dmangine API | |
494 | */ | |
495 | static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss) | |
496 | { | |
497 | struct device *dev = ss->pcm->card->dev; | |
f0fba2ad | 498 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
499 | u32 __iomem *base = info->reg; |
500 | struct siu_port *port_info = siu_port_info(ss); | |
501 | struct snd_pcm_runtime *rt = ss->runtime; | |
502 | size_t ptr; | |
503 | struct siu_stream *siu_stream; | |
504 | ||
505 | if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
506 | siu_stream = &port_info->playback; | |
507 | else | |
508 | siu_stream = &port_info->capture; | |
509 | ||
510 | /* | |
511 | * ptr is the offset into the buffer where the dma is currently at. We | |
512 | * check if the dma buffer has just wrapped. | |
513 | */ | |
514 | ptr = PERIOD_OFFSET(rt->dma_addr, | |
515 | siu_stream->cur_period, | |
516 | siu_stream->period_bytes) - rt->dma_addr; | |
517 | ||
518 | dev_dbg(dev, | |
519 | "%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n", | |
520 | __func__, info->port_id, siu_read32(base + SIU_EVNTC), | |
521 | siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes, | |
522 | siu_stream->cookie); | |
523 | ||
524 | if (ptr >= siu_stream->buf_bytes) | |
525 | ptr = 0; | |
526 | ||
527 | return bytes_to_frames(ss->runtime, ptr); | |
528 | } | |
529 | ||
552d1ef6 | 530 | static int siu_pcm_new(struct snd_soc_pcm_runtime *rtd) |
895d4509 GL |
531 | { |
532 | /* card->dev == socdev->dev, see snd_soc_new_pcms() */ | |
552d1ef6 LG |
533 | struct snd_card *card = rtd->card->snd_card; |
534 | struct snd_pcm *pcm = rtd->pcm; | |
f0fba2ad | 535 | struct siu_info *info = siu_i2s_data; |
895d4509 GL |
536 | struct platform_device *pdev = to_platform_device(card->dev); |
537 | int ret; | |
538 | int i; | |
539 | ||
540 | /* pdev->id selects between SIUA and SIUB */ | |
541 | if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM) | |
542 | return -EINVAL; | |
543 | ||
544 | info->port_id = pdev->id; | |
545 | ||
546 | /* | |
547 | * While the siu has 2 ports, only one port can be on at a time (only 1 | |
548 | * SPB). So far all the boards using the siu had only one of the ports | |
549 | * wired to a codec. To simplify things, we only register one port with | |
550 | * alsa. In case both ports are needed, it should be changed here | |
551 | */ | |
552 | for (i = pdev->id; i < pdev->id + 1; i++) { | |
553 | struct siu_port **port_info = &siu_ports[i]; | |
554 | ||
555 | ret = siu_init_port(i, port_info, card); | |
556 | if (ret < 0) | |
557 | return ret; | |
558 | ||
559 | ret = snd_pcm_lib_preallocate_pages_for_all(pcm, | |
560 | SNDRV_DMA_TYPE_DEV, NULL, | |
561 | SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX); | |
562 | if (ret < 0) { | |
563 | dev_err(card->dev, | |
564 | "snd_pcm_lib_preallocate_pages_for_all() err=%d", | |
565 | ret); | |
566 | goto fail; | |
567 | } | |
568 | ||
569 | (*port_info)->pcm = pcm; | |
570 | ||
571 | /* IO tasklets */ | |
572 | tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet, | |
573 | (unsigned long)&(*port_info)->playback); | |
574 | tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet, | |
575 | (unsigned long)&(*port_info)->capture); | |
576 | } | |
577 | ||
578 | dev_info(card->dev, "SuperH SIU driver initialized.\n"); | |
579 | return 0; | |
580 | ||
581 | fail: | |
582 | siu_free_port(siu_ports[pdev->id]); | |
583 | dev_err(card->dev, "SIU: failed to initialize.\n"); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | static void siu_pcm_free(struct snd_pcm *pcm) | |
588 | { | |
589 | struct platform_device *pdev = to_platform_device(pcm->card->dev); | |
590 | struct siu_port *port_info = siu_ports[pdev->id]; | |
591 | ||
592 | tasklet_kill(&port_info->capture.tasklet); | |
593 | tasklet_kill(&port_info->playback.tasklet); | |
594 | ||
595 | siu_free_port(port_info); | |
596 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
597 | ||
598 | dev_dbg(pcm->card->dev, "%s\n", __func__); | |
599 | } | |
600 | ||
601 | static struct snd_pcm_ops siu_pcm_ops = { | |
602 | .open = siu_pcm_open, | |
603 | .close = siu_pcm_close, | |
604 | .ioctl = snd_pcm_lib_ioctl, | |
605 | .hw_params = siu_pcm_hw_params, | |
606 | .hw_free = siu_pcm_hw_free, | |
607 | .prepare = siu_pcm_prepare, | |
608 | .trigger = siu_pcm_trigger, | |
609 | .pointer = siu_pcm_pointer_dma, | |
610 | }; | |
611 | ||
f0fba2ad LG |
612 | struct snd_soc_platform_driver siu_platform = { |
613 | .ops = &siu_pcm_ops, | |
895d4509 GL |
614 | .pcm_new = siu_pcm_new, |
615 | .pcm_free = siu_pcm_free, | |
616 | }; | |
617 | EXPORT_SYMBOL_GPL(siu_platform); |