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Initial commit
[wrt350n-kernel.git] / sound / pci / cs5535audio / cs5535audio_pcm.c
blobcdcda87116c34bc895b49e8def2ffa28a4c22491
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/core.h>
29 #include <sound/control.h>
30 #include <sound/initval.h>
31 #include <sound/asoundef.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/ac97_codec.h>
35 #include "cs5535audio.h"
36
37 static struct snd_pcm_hardware snd_cs5535audio_playback =
38 {
39 .info = (
40 SNDRV_PCM_INFO_MMAP |
41 SNDRV_PCM_INFO_INTERLEAVED |
42 SNDRV_PCM_INFO_BLOCK_TRANSFER |
43 SNDRV_PCM_INFO_MMAP_VALID |
44 SNDRV_PCM_INFO_PAUSE |
45 SNDRV_PCM_INFO_RESUME
46 ),
47 .formats = (
48 SNDRV_PCM_FMTBIT_S16_LE
49 ),
50 .rates = (
51 SNDRV_PCM_RATE_CONTINUOUS |
52 SNDRV_PCM_RATE_8000_48000
53 ),
54 .rate_min = 4000,
55 .rate_max = 48000,
56 .channels_min = 2,
57 .channels_max = 2,
58 .buffer_bytes_max = (128*1024),
59 .period_bytes_min = 64,
60 .period_bytes_max = (64*1024 - 16),
61 .periods_min = 1,
62 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
63 .fifo_size = 0,
64 };
65
66 static struct snd_pcm_hardware snd_cs5535audio_capture =
67 {
68 .info = (
69 SNDRV_PCM_INFO_MMAP |
70 SNDRV_PCM_INFO_INTERLEAVED |
71 SNDRV_PCM_INFO_BLOCK_TRANSFER |
72 SNDRV_PCM_INFO_MMAP_VALID
73 ),
74 .formats = (
75 SNDRV_PCM_FMTBIT_S16_LE
76 ),
77 .rates = (
78 SNDRV_PCM_RATE_CONTINUOUS |
79 SNDRV_PCM_RATE_8000_48000
80 ),
81 .rate_min = 4000,
82 .rate_max = 48000,
83 .channels_min = 2,
84 .channels_max = 2,
85 .buffer_bytes_max = (128*1024),
86 .period_bytes_min = 64,
87 .period_bytes_max = (64*1024 - 16),
88 .periods_min = 1,
89 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
90 .fifo_size = 0,
91 };
92
93 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
94 {
95 int err;
96 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
97 struct snd_pcm_runtime *runtime = substream->runtime;
98
99 runtime->hw = snd_cs5535audio_playback;
100 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
101 snd_pcm_limit_hw_rates(runtime);
102 cs5535au->playback_substream = substream;
103 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
104 if ((err = snd_pcm_hw_constraint_integer(runtime,
105 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
106 return err;
107
108 return 0;
109 }
110
111 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
112 {
113 return 0;
114 }
115
116 #define CS5535AUDIO_DESC_LIST_SIZE \
117 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
118
119 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
120 struct cs5535audio_dma *dma,
121 struct snd_pcm_substream *substream,
122 unsigned int periods,
123 unsigned int period_bytes)
124 {
125 unsigned int i;
126 u32 addr, desc_addr, jmpprd_addr;
127 struct cs5535audio_dma_desc *lastdesc;
128
129 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
130 return -ENOMEM;
131
132 if (dma->desc_buf.area == NULL) {
133 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
134 snd_dma_pci_data(cs5535au->pci),
135 CS5535AUDIO_DESC_LIST_SIZE+1,
136 &dma->desc_buf) < 0)
137 return -ENOMEM;
138 dma->period_bytes = dma->periods = 0;
139 }
140
141 if (dma->periods == periods && dma->period_bytes == period_bytes)
142 return 0;
143
144 /* the u32 cast is okay because in snd*create we successfully told
145 pci alloc that we're only 32 bit capable so the uppper will be 0 */
146 addr = (u32) substream->runtime->dma_addr;
147 desc_addr = (u32) dma->desc_buf.addr;
148 for (i = 0; i < periods; i++) {
149 struct cs5535audio_dma_desc *desc =
150 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
151 desc->addr = cpu_to_le32(addr);
152 desc->size = cpu_to_le32(period_bytes);
153 desc->ctlreserved = cpu_to_le32(PRD_EOP);
154 desc_addr += sizeof(struct cs5535audio_dma_desc);
155 addr += period_bytes;
156 }
157 /* we reserved one dummy descriptor at the end to do the PRD jump */
158 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
159 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
160 lastdesc->size = 0;
161 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
162 jmpprd_addr = cpu_to_le32(lastdesc->addr +
163 (sizeof(struct cs5535audio_dma_desc)*periods));
164
165 dma->substream = substream;
166 dma->period_bytes = period_bytes;
167 dma->periods = periods;
168 spin_lock_irq(&cs5535au->reg_lock);
169 dma->ops->disable_dma(cs5535au);
170 dma->ops->setup_prd(cs5535au, jmpprd_addr);
171 spin_unlock_irq(&cs5535au->reg_lock);
172 return 0;
173 }
174
175 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
176 {
177 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
178 }
179
180 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
181 {
182 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
183 }
184
185 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
186 {
187 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
188 }
189
190 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
191 u32 prd_addr)
192 {
193 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
194 }
195
196 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
197 {
198 return cs_readl(cs5535au, ACC_BM0_PRD);
199 }
200
201 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
202 {
203 return cs_readl(cs5535au, ACC_BM0_PNTR);
204 }
205
206 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
207 {
208 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
209 }
210
211 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
212 {
213 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
214 }
215
216 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
217 {
218 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
219 }
220
221 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
222 u32 prd_addr)
223 {
224 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
225 }
226
227 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
228 {
229 return cs_readl(cs5535au, ACC_BM1_PRD);
230 }
231
232 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
233 {
234 return cs_readl(cs5535au, ACC_BM1_PNTR);
235 }
236
237 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
238 struct cs5535audio_dma *dma,
239 struct snd_pcm_substream *substream)
240 {
241 snd_dma_free_pages(&dma->desc_buf);
242 dma->desc_buf.area = NULL;
243 dma->substream = 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 break;
302 case SNDRV_PCM_TRIGGER_STOP:
303 dma->ops->disable_dma(cs5535au);
304 break;
305 case SNDRV_PCM_TRIGGER_SUSPEND:
306 dma->ops->disable_dma(cs5535au);
307 break;
308 default:
309 snd_printk(KERN_ERR "unhandled trigger\n");
310 err = -EINVAL;
311 break;
312 }
313 spin_unlock(&cs5535au->reg_lock);
314 return err;
315 }
316
317 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
318 *substream)
319 {
320 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
321 u32 curdma;
322 struct cs5535audio_dma *dma;
323
324 dma = substream->runtime->private_data;
325 curdma = dma->ops->read_dma_pntr(cs5535au);
326 if (curdma < dma->buf_addr) {
327 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
328 curdma, dma->buf_addr);
329 return 0;
330 }
331 curdma -= dma->buf_addr;
332 if (curdma >= dma->buf_bytes) {
333 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
334 curdma, dma->buf_bytes);
335 return 0;
336 }
337 return bytes_to_frames(substream->runtime, curdma);
338 }
339
340 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
341 {
342 int err;
343 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
344 struct snd_pcm_runtime *runtime = substream->runtime;
345
346 runtime->hw = snd_cs5535audio_capture;
347 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
348 snd_pcm_limit_hw_rates(runtime);
349 cs5535au->capture_substream = substream;
350 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
351 if ((err = snd_pcm_hw_constraint_integer(runtime,
352 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
353 return err;
354 return 0;
355 }
356
357 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
358 {
359 return 0;
360 }
361
362 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
363 {
364 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
365 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
366 substream->runtime->rate);
367 }
368
369 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
370 .open = snd_cs5535audio_playback_open,
371 .close = snd_cs5535audio_playback_close,
372 .ioctl = snd_pcm_lib_ioctl,
373 .hw_params = snd_cs5535audio_hw_params,
374 .hw_free = snd_cs5535audio_hw_free,
375 .prepare = snd_cs5535audio_playback_prepare,
376 .trigger = snd_cs5535audio_trigger,
377 .pointer = snd_cs5535audio_pcm_pointer,
378 };
379
380 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
381 .open = snd_cs5535audio_capture_open,
382 .close = snd_cs5535audio_capture_close,
383 .ioctl = snd_pcm_lib_ioctl,
384 .hw_params = snd_cs5535audio_hw_params,
385 .hw_free = snd_cs5535audio_hw_free,
386 .prepare = snd_cs5535audio_capture_prepare,
387 .trigger = snd_cs5535audio_trigger,
388 .pointer = snd_cs5535audio_pcm_pointer,
389 };
390
391 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
392 .type = CS5535AUDIO_DMA_PLAYBACK,
393 .enable_dma = cs5535audio_playback_enable_dma,
394 .disable_dma = cs5535audio_playback_disable_dma,
395 .setup_prd = cs5535audio_playback_setup_prd,
396 .read_prd = cs5535audio_playback_read_prd,
397 .pause_dma = cs5535audio_playback_pause_dma,
398 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
399 };
400
401 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
402 .type = CS5535AUDIO_DMA_CAPTURE,
403 .enable_dma = cs5535audio_capture_enable_dma,
404 .disable_dma = cs5535audio_capture_disable_dma,
405 .setup_prd = cs5535audio_capture_setup_prd,
406 .read_prd = cs5535audio_capture_read_prd,
407 .pause_dma = cs5535audio_capture_pause_dma,
408 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
409 };
410
411 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
412 {
413 struct snd_pcm *pcm;
414 int err;
415
416 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
417 if (err < 0)
418 return err;
419
420 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
421 &snd_cs5535audio_playback_dma_ops;
422 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
423 &snd_cs5535audio_capture_dma_ops;
424 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
425 &snd_cs5535audio_playback_ops);
426 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
427 &snd_cs5535audio_capture_ops);
428
429 pcm->private_data = cs5535au;
430 pcm->info_flags = 0;
431 strcpy(pcm->name, "CS5535 Audio");
432
433 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
434 snd_dma_pci_data(cs5535au->pci),
435 64*1024, 128*1024);
436 cs5535au->pcm = pcm;
437
438 return 0;
439 }
440
WRT350N Kernel Patches