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[linux-2.6/sactl.git] / sound / pci / cs5535audio / cs5535audio_pcm.c
blob5450a9e8f13366b991a223d985429cef7aa8180f
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/slab.h>
27 #include <linux/pci.h>
28 #include <sound/driver.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/initval.h>
32 #include <sound/asoundef.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/ac97_codec.h>
36 #include "cs5535audio.h"
37
38 static struct snd_pcm_hardware snd_cs5535audio_playback =
39 {
40 .info = (
41 SNDRV_PCM_INFO_MMAP |
42 SNDRV_PCM_INFO_INTERLEAVED |
43 SNDRV_PCM_INFO_BLOCK_TRANSFER |
44 SNDRV_PCM_INFO_MMAP_VALID |
45 SNDRV_PCM_INFO_PAUSE |
46 SNDRV_PCM_INFO_SYNC_START |
47 SNDRV_PCM_INFO_RESUME
48 ),
49 .formats = (
50 SNDRV_PCM_FMTBIT_S16_LE
51 ),
52 .rates = (
53 SNDRV_PCM_RATE_CONTINUOUS |
54 SNDRV_PCM_RATE_8000_48000
55 ),
56 .rate_min = 4000,
57 .rate_max = 48000,
58 .channels_min = 2,
59 .channels_max = 2,
60 .buffer_bytes_max = (128*1024),
61 .period_bytes_min = 64,
62 .period_bytes_max = (64*1024 - 16),
63 .periods_min = 1,
64 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
65 .fifo_size = 0,
66 };
67
68 static struct snd_pcm_hardware snd_cs5535audio_capture =
69 {
70 .info = (
71 SNDRV_PCM_INFO_MMAP |
72 SNDRV_PCM_INFO_INTERLEAVED |
73 SNDRV_PCM_INFO_BLOCK_TRANSFER |
74 SNDRV_PCM_INFO_MMAP_VALID |
75 SNDRV_PCM_INFO_SYNC_START
76 ),
77 .formats = (
78 SNDRV_PCM_FMTBIT_S16_LE
79 ),
80 .rates = (
81 SNDRV_PCM_RATE_CONTINUOUS |
82 SNDRV_PCM_RATE_8000_48000
83 ),
84 .rate_min = 4000,
85 .rate_max = 48000,
86 .channels_min = 2,
87 .channels_max = 2,
88 .buffer_bytes_max = (128*1024),
89 .period_bytes_min = 64,
90 .period_bytes_max = (64*1024 - 16),
91 .periods_min = 1,
92 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
93 .fifo_size = 0,
94 };
95
96 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
97 {
98 int err;
99 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
100 struct snd_pcm_runtime *runtime = substream->runtime;
101
102 runtime->hw = snd_cs5535audio_playback;
103 cs5535au->playback_substream = substream;
104 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
105 snd_pcm_set_sync(substream);
106 if ((err = snd_pcm_hw_constraint_integer(runtime,
107 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
108 return err;
109
110 return 0;
111 }
112
113 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
114 {
115 return 0;
116 }
117
118 #define CS5535AUDIO_DESC_LIST_SIZE \
119 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
120
121 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
122 struct cs5535audio_dma *dma,
123 struct snd_pcm_substream *substream,
124 unsigned int periods,
125 unsigned int period_bytes)
126 {
127 unsigned int i;
128 u32 addr, desc_addr, jmpprd_addr;
129 struct cs5535audio_dma_desc *lastdesc;
130
131 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
132 return -ENOMEM;
133
134 if (dma->desc_buf.area == NULL) {
135 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
136 snd_dma_pci_data(cs5535au->pci),
137 CS5535AUDIO_DESC_LIST_SIZE+1,
138 &dma->desc_buf) < 0)
139 return -ENOMEM;
140 dma->period_bytes = dma->periods = 0;
141 }
142
143 if (dma->periods == periods && dma->period_bytes == period_bytes)
144 return 0;
145
146 /* the u32 cast is okay because in snd*create we successfully told
147 pci alloc that we're only 32 bit capable so the uppper will be 0 */
148 addr = (u32) substream->runtime->dma_addr;
149 desc_addr = (u32) dma->desc_buf.addr;
150 for (i = 0; i < periods; i++) {
151 struct cs5535audio_dma_desc *desc =
152 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
153 desc->addr = cpu_to_le32(addr);
154 desc->size = cpu_to_le32(period_bytes);
155 desc->ctlreserved = cpu_to_le32(PRD_EOP);
156 desc_addr += sizeof(struct cs5535audio_dma_desc);
157 addr += period_bytes;
158 }
159 /* we reserved one dummy descriptor at the end to do the PRD jump */
160 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
161 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
162 lastdesc->size = 0;
163 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
164 jmpprd_addr = cpu_to_le32(lastdesc->addr +
165 (sizeof(struct cs5535audio_dma_desc)*periods));
166
167 dma->period_bytes = period_bytes;
168 dma->periods = periods;
169 spin_lock_irq(&cs5535au->reg_lock);
170 dma->ops->disable_dma(cs5535au);
171 dma->ops->setup_prd(cs5535au, jmpprd_addr);
172 spin_unlock_irq(&cs5535au->reg_lock);
173 return 0;
174 }
175
176 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
177 {
178 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
179 }
180
181 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
182 {
183 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
184 }
185
186 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
187 {
188 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
189 }
190
191 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
192 u32 prd_addr)
193 {
194 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
195 }
196
197 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
198 {
199 return cs_readl(cs5535au, ACC_BM0_PRD);
200 }
201
202 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
203 {
204 return cs_readl(cs5535au, ACC_BM0_PNTR);
205 }
206
207 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
208 {
209 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
210 }
211
212 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
213 {
214 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
215 }
216
217 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
218 {
219 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
220 }
221
222 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
223 u32 prd_addr)
224 {
225 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
226 }
227
228 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
229 {
230 return cs_readl(cs5535au, ACC_BM1_PRD);
231 }
232
233 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
234 {
235 return cs_readl(cs5535au, ACC_BM1_PNTR);
236 }
237
238 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
239 struct cs5535audio_dma *dma,
240 struct snd_pcm_substream *substream)
241 {
242 snd_dma_free_pages(&dma->desc_buf);
243 dma->desc_buf.area = NULL;
244 }
245
246 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
247 struct snd_pcm_hw_params *hw_params)
248 {
249 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
250 struct cs5535audio_dma *dma = substream->runtime->private_data;
251 int err;
252
253 err = snd_pcm_lib_malloc_pages(substream,
254 params_buffer_bytes(hw_params));
255 if (err < 0)
256 return err;
257 dma->buf_addr = substream->runtime->dma_addr;
258 dma->buf_bytes = params_buffer_bytes(hw_params);
259
260 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
261 params_periods(hw_params),
262 params_period_bytes(hw_params));
263 return err;
264 }
265
266 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
267 {
268 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
269 struct cs5535audio_dma *dma = substream->runtime->private_data;
270
271 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
272 return snd_pcm_lib_free_pages(substream);
273 }
274
275 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
276 {
277 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
278 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
279 substream->runtime->rate);
280 }
281
282 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
283 {
284 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
285 struct cs5535audio_dma *dma = substream->runtime->private_data;
286 int err = 0;
287
288 spin_lock(&cs5535au->reg_lock);
289 switch (cmd) {
290 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
291 dma->ops->pause_dma(cs5535au);
292 break;
293 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
294 dma->ops->enable_dma(cs5535au);
295 break;
296 case SNDRV_PCM_TRIGGER_START:
297 dma->ops->enable_dma(cs5535au);
298 break;
299 case SNDRV_PCM_TRIGGER_RESUME:
300 dma->ops->enable_dma(cs5535au);
301 dma->suspended = 0;
302 break;
303 case SNDRV_PCM_TRIGGER_STOP:
304 dma->ops->disable_dma(cs5535au);
305 break;
306 case SNDRV_PCM_TRIGGER_SUSPEND:
307 dma->ops->disable_dma(cs5535au);
308 dma->suspended = 1;
309 break;
310 default:
311 snd_printk(KERN_ERR "unhandled trigger\n");
312 err = -EINVAL;
313 break;
314 }
315 spin_unlock(&cs5535au->reg_lock);
316 return err;
317 }
318
319 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
320 *substream)
321 {
322 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
323 u32 curdma;
324 struct cs5535audio_dma *dma;
325
326 dma = substream->runtime->private_data;
327 curdma = dma->ops->read_dma_pntr(cs5535au);
328 if (curdma < dma->buf_addr) {
329 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
330 curdma, dma->buf_addr);
331 return 0;
332 }
333 curdma -= dma->buf_addr;
334 if (curdma >= dma->buf_bytes) {
335 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
336 curdma, dma->buf_bytes);
337 return 0;
338 }
339 return bytes_to_frames(substream->runtime, curdma);
340 }
341
342 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
343 {
344 int err;
345 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
346 struct snd_pcm_runtime *runtime = substream->runtime;
347
348 runtime->hw = snd_cs5535audio_capture;
349 cs5535au->capture_substream = substream;
350 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
351 snd_pcm_set_sync(substream);
352 if ((err = snd_pcm_hw_constraint_integer(runtime,
353 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
354 return err;
355 return 0;
356 }
357
358 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
359 {
360 return 0;
361 }
362
363 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
364 {
365 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
366 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
367 substream->runtime->rate);
368 }
369
370 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
371 .open = snd_cs5535audio_playback_open,
372 .close = snd_cs5535audio_playback_close,
373 .ioctl = snd_pcm_lib_ioctl,
374 .hw_params = snd_cs5535audio_hw_params,
375 .hw_free = snd_cs5535audio_hw_free,
376 .prepare = snd_cs5535audio_playback_prepare,
377 .trigger = snd_cs5535audio_trigger,
378 .pointer = snd_cs5535audio_pcm_pointer,
379 };
380
381 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
382 .open = snd_cs5535audio_capture_open,
383 .close = snd_cs5535audio_capture_close,
384 .ioctl = snd_pcm_lib_ioctl,
385 .hw_params = snd_cs5535audio_hw_params,
386 .hw_free = snd_cs5535audio_hw_free,
387 .prepare = snd_cs5535audio_capture_prepare,
388 .trigger = snd_cs5535audio_trigger,
389 .pointer = snd_cs5535audio_pcm_pointer,
390 };
391
392 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
393 .type = CS5535AUDIO_DMA_PLAYBACK,
394 .enable_dma = cs5535audio_playback_enable_dma,
395 .disable_dma = cs5535audio_playback_disable_dma,
396 .setup_prd = cs5535audio_playback_setup_prd,
397 .read_prd = cs5535audio_playback_read_prd,
398 .pause_dma = cs5535audio_playback_pause_dma,
399 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
400 };
401
402 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
403 .type = CS5535AUDIO_DMA_CAPTURE,
404 .enable_dma = cs5535audio_capture_enable_dma,
405 .disable_dma = cs5535audio_capture_disable_dma,
406 .setup_prd = cs5535audio_capture_setup_prd,
407 .read_prd = cs5535audio_capture_read_prd,
408 .pause_dma = cs5535audio_capture_pause_dma,
409 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
410 };
411
412 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
413 {
414 struct snd_pcm *pcm;
415 int err;
416
417 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
418 if (err < 0)
419 return err;
420
421 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
422 &snd_cs5535audio_playback_dma_ops;
423 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
424 &snd_cs5535audio_capture_dma_ops;
425 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
426 &snd_cs5535audio_playback_ops);
427 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
428 &snd_cs5535audio_capture_ops);
429
430 pcm->private_data = cs5535au;
431 pcm->info_flags = 0;
432 strcpy(pcm->name, "CS5535 Audio");
433
434 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
435 snd_dma_pci_data(cs5535au->pci),
436 64*1024, 128*1024);
437 cs5535au->pcm = pcm;
438
439 return 0;
440 }
441
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