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writeback: split writeback_inodes_wb
[linux-2.6/next.git] / sound / pci / cs5535audio / cs5535audio_pcm.c
blobf16bc8aad6ed205a7f7b983e9486e4437090c875
1 /*
2 * Driver for audio on multifunction CS5535 companion device
3 * Copyright (C) Jaya Kumar
4 *
5 * Based on Jaroslav Kysela and Takashi Iwai's examples.
6 * This work was sponsored by CIS(M) Sdn Bhd.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * todo: add be fmt support, spdif, pm
23 */
24
25 #include <linux/init.h>
26 #include <linux/pci.h>
27 #include <sound/core.h>
28 #include <sound/control.h>
29 #include <sound/initval.h>
30 #include <sound/asoundef.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/ac97_codec.h>
34 #include "cs5535audio.h"
35
36 static struct snd_pcm_hardware snd_cs5535audio_playback =
37 {
38 .info = (
39 SNDRV_PCM_INFO_MMAP |
40 SNDRV_PCM_INFO_INTERLEAVED |
41 SNDRV_PCM_INFO_BLOCK_TRANSFER |
42 SNDRV_PCM_INFO_MMAP_VALID |
43 SNDRV_PCM_INFO_PAUSE |
44 SNDRV_PCM_INFO_RESUME
45 ),
46 .formats = (
47 SNDRV_PCM_FMTBIT_S16_LE
48 ),
49 .rates = (
50 SNDRV_PCM_RATE_CONTINUOUS |
51 SNDRV_PCM_RATE_8000_48000
52 ),
53 .rate_min = 4000,
54 .rate_max = 48000,
55 .channels_min = 2,
56 .channels_max = 2,
57 .buffer_bytes_max = (128*1024),
58 .period_bytes_min = 64,
59 .period_bytes_max = (64*1024 - 16),
60 .periods_min = 1,
61 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
62 .fifo_size = 0,
63 };
64
65 static struct snd_pcm_hardware snd_cs5535audio_capture =
66 {
67 .info = (
68 SNDRV_PCM_INFO_MMAP |
69 SNDRV_PCM_INFO_INTERLEAVED |
70 SNDRV_PCM_INFO_BLOCK_TRANSFER |
71 SNDRV_PCM_INFO_MMAP_VALID
72 ),
73 .formats = (
74 SNDRV_PCM_FMTBIT_S16_LE
75 ),
76 .rates = (
77 SNDRV_PCM_RATE_CONTINUOUS |
78 SNDRV_PCM_RATE_8000_48000
79 ),
80 .rate_min = 4000,
81 .rate_max = 48000,
82 .channels_min = 2,
83 .channels_max = 2,
84 .buffer_bytes_max = (128*1024),
85 .period_bytes_min = 64,
86 .period_bytes_max = (64*1024 - 16),
87 .periods_min = 1,
88 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
89 .fifo_size = 0,
90 };
91
92 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
93 {
94 int err;
95 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
96 struct snd_pcm_runtime *runtime = substream->runtime;
97
98 runtime->hw = snd_cs5535audio_playback;
99 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
100 snd_pcm_limit_hw_rates(runtime);
101 cs5535au->playback_substream = substream;
102 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
103 if ((err = snd_pcm_hw_constraint_integer(runtime,
104 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
105 return err;
106
107 return 0;
108 }
109
110 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
111 {
112 return 0;
113 }
114
115 #define CS5535AUDIO_DESC_LIST_SIZE \
116 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
117
118 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
119 struct cs5535audio_dma *dma,
120 struct snd_pcm_substream *substream,
121 unsigned int periods,
122 unsigned int period_bytes)
123 {
124 unsigned int i;
125 u32 addr, desc_addr, jmpprd_addr;
126 struct cs5535audio_dma_desc *lastdesc;
127
128 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
129 return -ENOMEM;
130
131 if (dma->desc_buf.area == NULL) {
132 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
133 snd_dma_pci_data(cs5535au->pci),
134 CS5535AUDIO_DESC_LIST_SIZE+1,
135 &dma->desc_buf) < 0)
136 return -ENOMEM;
137 dma->period_bytes = dma->periods = 0;
138 }
139
140 if (dma->periods == periods && dma->period_bytes == period_bytes)
141 return 0;
142
143 /* the u32 cast is okay because in snd*create we successfully told
144 pci alloc that we're only 32 bit capable so the uppper will be 0 */
145 addr = (u32) substream->runtime->dma_addr;
146 desc_addr = (u32) dma->desc_buf.addr;
147 for (i = 0; i < periods; i++) {
148 struct cs5535audio_dma_desc *desc =
149 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
150 desc->addr = cpu_to_le32(addr);
151 desc->size = cpu_to_le32(period_bytes);
152 desc->ctlreserved = cpu_to_le32(PRD_EOP);
153 desc_addr += sizeof(struct cs5535audio_dma_desc);
154 addr += period_bytes;
155 }
156 /* we reserved one dummy descriptor at the end to do the PRD jump */
157 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
158 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
159 lastdesc->size = 0;
160 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
161 jmpprd_addr = cpu_to_le32(lastdesc->addr +
162 (sizeof(struct cs5535audio_dma_desc)*periods));
163
164 dma->substream = substream;
165 dma->period_bytes = period_bytes;
166 dma->periods = periods;
167 spin_lock_irq(&cs5535au->reg_lock);
168 dma->ops->disable_dma(cs5535au);
169 dma->ops->setup_prd(cs5535au, jmpprd_addr);
170 spin_unlock_irq(&cs5535au->reg_lock);
171 return 0;
172 }
173
174 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
175 {
176 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
177 }
178
179 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
180 {
181 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
182 }
183
184 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
185 {
186 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
187 }
188
189 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
190 u32 prd_addr)
191 {
192 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
193 }
194
195 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
196 {
197 return cs_readl(cs5535au, ACC_BM0_PRD);
198 }
199
200 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
201 {
202 return cs_readl(cs5535au, ACC_BM0_PNTR);
203 }
204
205 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
206 {
207 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
208 }
209
210 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
211 {
212 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
213 }
214
215 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
216 {
217 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
218 }
219
220 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
221 u32 prd_addr)
222 {
223 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
224 }
225
226 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
227 {
228 return cs_readl(cs5535au, ACC_BM1_PRD);
229 }
230
231 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
232 {
233 return cs_readl(cs5535au, ACC_BM1_PNTR);
234 }
235
236 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
237 struct cs5535audio_dma *dma,
238 struct snd_pcm_substream *substream)
239 {
240 snd_dma_free_pages(&dma->desc_buf);
241 dma->desc_buf.area = NULL;
242 dma->substream = NULL;
243 }
244
245 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
246 struct snd_pcm_hw_params *hw_params)
247 {
248 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
249 struct cs5535audio_dma *dma = substream->runtime->private_data;
250 int err;
251
252 err = snd_pcm_lib_malloc_pages(substream,
253 params_buffer_bytes(hw_params));
254 if (err < 0)
255 return err;
256 dma->buf_addr = substream->runtime->dma_addr;
257 dma->buf_bytes = params_buffer_bytes(hw_params);
258
259 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
260 params_periods(hw_params),
261 params_period_bytes(hw_params));
262 if (!err)
263 dma->pcm_open_flag = 1;
264
265 return err;
266 }
267
268 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
269 {
270 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
271 struct cs5535audio_dma *dma = substream->runtime->private_data;
272
273 if (dma->pcm_open_flag) {
274 if (substream == cs5535au->playback_substream)
275 snd_ac97_update_power(cs5535au->ac97,
276 AC97_PCM_FRONT_DAC_RATE, 0);
277 else
278 snd_ac97_update_power(cs5535au->ac97,
279 AC97_PCM_LR_ADC_RATE, 0);
280 dma->pcm_open_flag = 0;
281 }
282 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
283 return snd_pcm_lib_free_pages(substream);
284 }
285
286 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
287 {
288 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
289 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
290 substream->runtime->rate);
291 }
292
293 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
294 {
295 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
296 struct cs5535audio_dma *dma = substream->runtime->private_data;
297 int err = 0;
298
299 spin_lock(&cs5535au->reg_lock);
300 switch (cmd) {
301 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
302 dma->ops->pause_dma(cs5535au);
303 break;
304 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
305 dma->ops->enable_dma(cs5535au);
306 break;
307 case SNDRV_PCM_TRIGGER_START:
308 dma->ops->enable_dma(cs5535au);
309 break;
310 case SNDRV_PCM_TRIGGER_RESUME:
311 dma->ops->enable_dma(cs5535au);
312 break;
313 case SNDRV_PCM_TRIGGER_STOP:
314 dma->ops->disable_dma(cs5535au);
315 break;
316 case SNDRV_PCM_TRIGGER_SUSPEND:
317 dma->ops->disable_dma(cs5535au);
318 break;
319 default:
320 snd_printk(KERN_ERR "unhandled trigger\n");
321 err = -EINVAL;
322 break;
323 }
324 spin_unlock(&cs5535au->reg_lock);
325 return err;
326 }
327
328 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
329 *substream)
330 {
331 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
332 u32 curdma;
333 struct cs5535audio_dma *dma;
334
335 dma = substream->runtime->private_data;
336 curdma = dma->ops->read_dma_pntr(cs5535au);
337 if (curdma < dma->buf_addr) {
338 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
339 curdma, dma->buf_addr);
340 return 0;
341 }
342 curdma -= dma->buf_addr;
343 if (curdma >= dma->buf_bytes) {
344 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
345 curdma, dma->buf_bytes);
346 return 0;
347 }
348 return bytes_to_frames(substream->runtime, curdma);
349 }
350
351 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
352 {
353 int err;
354 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
355 struct snd_pcm_runtime *runtime = substream->runtime;
356
357 runtime->hw = snd_cs5535audio_capture;
358 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
359 snd_pcm_limit_hw_rates(runtime);
360 cs5535au->capture_substream = substream;
361 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
362 if ((err = snd_pcm_hw_constraint_integer(runtime,
363 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
364 return err;
365 olpc_capture_open(cs5535au->ac97);
366 return 0;
367 }
368
369 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
370 {
371 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
372 olpc_capture_close(cs5535au->ac97);
373 return 0;
374 }
375
376 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
377 {
378 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
379 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
380 substream->runtime->rate);
381 }
382
383 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
384 .open = snd_cs5535audio_playback_open,
385 .close = snd_cs5535audio_playback_close,
386 .ioctl = snd_pcm_lib_ioctl,
387 .hw_params = snd_cs5535audio_hw_params,
388 .hw_free = snd_cs5535audio_hw_free,
389 .prepare = snd_cs5535audio_playback_prepare,
390 .trigger = snd_cs5535audio_trigger,
391 .pointer = snd_cs5535audio_pcm_pointer,
392 };
393
394 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
395 .open = snd_cs5535audio_capture_open,
396 .close = snd_cs5535audio_capture_close,
397 .ioctl = snd_pcm_lib_ioctl,
398 .hw_params = snd_cs5535audio_hw_params,
399 .hw_free = snd_cs5535audio_hw_free,
400 .prepare = snd_cs5535audio_capture_prepare,
401 .trigger = snd_cs5535audio_trigger,
402 .pointer = snd_cs5535audio_pcm_pointer,
403 };
404
405 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
406 .type = CS5535AUDIO_DMA_PLAYBACK,
407 .enable_dma = cs5535audio_playback_enable_dma,
408 .disable_dma = cs5535audio_playback_disable_dma,
409 .setup_prd = cs5535audio_playback_setup_prd,
410 .read_prd = cs5535audio_playback_read_prd,
411 .pause_dma = cs5535audio_playback_pause_dma,
412 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
413 };
414
415 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
416 .type = CS5535AUDIO_DMA_CAPTURE,
417 .enable_dma = cs5535audio_capture_enable_dma,
418 .disable_dma = cs5535audio_capture_disable_dma,
419 .setup_prd = cs5535audio_capture_setup_prd,
420 .read_prd = cs5535audio_capture_read_prd,
421 .pause_dma = cs5535audio_capture_pause_dma,
422 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
423 };
424
425 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
426 {
427 struct snd_pcm *pcm;
428 int err;
429
430 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
431 if (err < 0)
432 return err;
433
434 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
435 &snd_cs5535audio_playback_dma_ops;
436 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
437 &snd_cs5535audio_capture_dma_ops;
438 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
439 &snd_cs5535audio_playback_ops);
440 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
441 &snd_cs5535audio_capture_ops);
442
443 pcm->private_data = cs5535au;
444 pcm->info_flags = 0;
445 strcpy(pcm->name, "CS5535 Audio");
446
447 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
448 snd_dma_pci_data(cs5535au->pci),
449 64*1024, 128*1024);
450 cs5535au->pcm = pcm;
451
452 return 0;
453 }
454
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