2 * Driver for audio on multifunction CS5535 companion device
3 * Copyright (C) Jaya Kumar
5 * Based on Jaroslav Kysela and Takashi Iwai's examples.
6 * This work was sponsored by CIS(M) Sdn Bhd.
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.
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.
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
22 * todo: add be fmt support, spdif, pm
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"
37 static struct snd_pcm_hardware snd_cs5535audio_playback =
41 SNDRV_PCM_INFO_INTERLEAVED |
42 SNDRV_PCM_INFO_BLOCK_TRANSFER |
43 SNDRV_PCM_INFO_MMAP_VALID |
44 SNDRV_PCM_INFO_PAUSE |
48 SNDRV_PCM_FMTBIT_S16_LE
51 SNDRV_PCM_RATE_CONTINUOUS |
52 SNDRV_PCM_RATE_8000_48000
58 .buffer_bytes_max = (128*1024),
59 .period_bytes_min = 64,
60 .period_bytes_max = (64*1024 - 16),
62 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
66 static struct snd_pcm_hardware snd_cs5535audio_capture =
70 SNDRV_PCM_INFO_INTERLEAVED |
71 SNDRV_PCM_INFO_BLOCK_TRANSFER |
72 SNDRV_PCM_INFO_MMAP_VALID
75 SNDRV_PCM_FMTBIT_S16_LE
78 SNDRV_PCM_RATE_CONTINUOUS |
79 SNDRV_PCM_RATE_8000_48000
85 .buffer_bytes_max = (128*1024),
86 .period_bytes_min = 64,
87 .period_bytes_max = (64*1024 - 16),
89 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
93 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
96 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
97 struct snd_pcm_runtime *runtime = substream->runtime;
99 runtime->hw = snd_cs5535audio_playback;
100 cs5535au->playback_substream = substream;
101 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
102 if ((err = snd_pcm_hw_constraint_integer(runtime,
103 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
109 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
114 #define CS5535AUDIO_DESC_LIST_SIZE \
115 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
117 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
118 struct cs5535audio_dma *dma,
119 struct snd_pcm_substream *substream,
120 unsigned int periods,
121 unsigned int period_bytes)
124 u32 addr, desc_addr, jmpprd_addr;
125 struct cs5535audio_dma_desc *lastdesc;
127 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
130 if (dma->desc_buf.area == NULL) {
131 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
132 snd_dma_pci_data(cs5535au->pci),
133 CS5535AUDIO_DESC_LIST_SIZE+1,
136 dma->period_bytes = dma->periods = 0;
139 if (dma->periods == periods && dma->period_bytes == period_bytes)
142 /* the u32 cast is okay because in snd*create we successfully told
143 pci alloc that we're only 32 bit capable so the uppper will be 0 */
144 addr = (u32) substream->runtime->dma_addr;
145 desc_addr = (u32) dma->desc_buf.addr;
146 for (i = 0; i < periods; i++) {
147 struct cs5535audio_dma_desc *desc =
148 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
149 desc->addr = cpu_to_le32(addr);
150 desc->size = cpu_to_le32(period_bytes);
151 desc->ctlreserved = cpu_to_le32(PRD_EOP);
152 desc_addr += sizeof(struct cs5535audio_dma_desc);
153 addr += period_bytes;
155 /* we reserved one dummy descriptor at the end to do the PRD jump */
156 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
157 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
159 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
160 jmpprd_addr = cpu_to_le32(lastdesc->addr +
161 (sizeof(struct cs5535audio_dma_desc)*periods));
163 dma->substream = substream;
164 dma->period_bytes = period_bytes;
165 dma->periods = periods;
166 spin_lock_irq(&cs5535au->reg_lock);
167 dma->ops->disable_dma(cs5535au);
168 dma->ops->setup_prd(cs5535au, jmpprd_addr);
169 spin_unlock_irq(&cs5535au->reg_lock);
173 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
175 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
178 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
180 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
183 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
185 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
188 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
191 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
194 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
196 return cs_readl(cs5535au, ACC_BM0_PRD);
199 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
201 return cs_readl(cs5535au, ACC_BM0_PNTR);
204 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
206 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
209 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
211 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
214 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
216 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
219 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
222 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
225 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
227 return cs_readl(cs5535au, ACC_BM1_PRD);
230 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
232 return cs_readl(cs5535au, ACC_BM1_PNTR);
235 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
236 struct cs5535audio_dma *dma,
237 struct snd_pcm_substream *substream)
239 snd_dma_free_pages(&dma->desc_buf);
240 dma->desc_buf.area = NULL;
241 dma->substream = NULL;
244 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
245 struct snd_pcm_hw_params *hw_params)
247 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
248 struct cs5535audio_dma *dma = substream->runtime->private_data;
251 err = snd_pcm_lib_malloc_pages(substream,
252 params_buffer_bytes(hw_params));
255 dma->buf_addr = substream->runtime->dma_addr;
256 dma->buf_bytes = params_buffer_bytes(hw_params);
258 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
259 params_periods(hw_params),
260 params_period_bytes(hw_params));
264 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
266 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
267 struct cs5535audio_dma *dma = substream->runtime->private_data;
269 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
270 return snd_pcm_lib_free_pages(substream);
273 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
275 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
276 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
277 substream->runtime->rate);
280 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
282 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
283 struct cs5535audio_dma *dma = substream->runtime->private_data;
286 spin_lock(&cs5535au->reg_lock);
288 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
289 dma->ops->pause_dma(cs5535au);
291 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
292 dma->ops->enable_dma(cs5535au);
294 case SNDRV_PCM_TRIGGER_START:
295 dma->ops->enable_dma(cs5535au);
297 case SNDRV_PCM_TRIGGER_RESUME:
298 dma->ops->enable_dma(cs5535au);
300 case SNDRV_PCM_TRIGGER_STOP:
301 dma->ops->disable_dma(cs5535au);
303 case SNDRV_PCM_TRIGGER_SUSPEND:
304 dma->ops->disable_dma(cs5535au);
307 snd_printk(KERN_ERR "unhandled trigger\n");
311 spin_unlock(&cs5535au->reg_lock);
315 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
318 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
320 struct cs5535audio_dma *dma;
322 dma = substream->runtime->private_data;
323 curdma = dma->ops->read_dma_pntr(cs5535au);
324 if (curdma < dma->buf_addr) {
325 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
326 curdma, dma->buf_addr);
329 curdma -= dma->buf_addr;
330 if (curdma >= dma->buf_bytes) {
331 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
332 curdma, dma->buf_bytes);
335 return bytes_to_frames(substream->runtime, curdma);
338 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
341 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
342 struct snd_pcm_runtime *runtime = substream->runtime;
344 runtime->hw = snd_cs5535audio_capture;
345 cs5535au->capture_substream = substream;
346 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
347 if ((err = snd_pcm_hw_constraint_integer(runtime,
348 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
353 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
358 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
360 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
361 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
362 substream->runtime->rate);
365 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
366 .open = snd_cs5535audio_playback_open,
367 .close = snd_cs5535audio_playback_close,
368 .ioctl = snd_pcm_lib_ioctl,
369 .hw_params = snd_cs5535audio_hw_params,
370 .hw_free = snd_cs5535audio_hw_free,
371 .prepare = snd_cs5535audio_playback_prepare,
372 .trigger = snd_cs5535audio_trigger,
373 .pointer = snd_cs5535audio_pcm_pointer,
376 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
377 .open = snd_cs5535audio_capture_open,
378 .close = snd_cs5535audio_capture_close,
379 .ioctl = snd_pcm_lib_ioctl,
380 .hw_params = snd_cs5535audio_hw_params,
381 .hw_free = snd_cs5535audio_hw_free,
382 .prepare = snd_cs5535audio_capture_prepare,
383 .trigger = snd_cs5535audio_trigger,
384 .pointer = snd_cs5535audio_pcm_pointer,
387 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
388 .type = CS5535AUDIO_DMA_PLAYBACK,
389 .enable_dma = cs5535audio_playback_enable_dma,
390 .disable_dma = cs5535audio_playback_disable_dma,
391 .setup_prd = cs5535audio_playback_setup_prd,
392 .read_prd = cs5535audio_playback_read_prd,
393 .pause_dma = cs5535audio_playback_pause_dma,
394 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
397 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
398 .type = CS5535AUDIO_DMA_CAPTURE,
399 .enable_dma = cs5535audio_capture_enable_dma,
400 .disable_dma = cs5535audio_capture_disable_dma,
401 .setup_prd = cs5535audio_capture_setup_prd,
402 .read_prd = cs5535audio_capture_read_prd,
403 .pause_dma = cs5535audio_capture_pause_dma,
404 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
407 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
412 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
416 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
417 &snd_cs5535audio_playback_dma_ops;
418 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
419 &snd_cs5535audio_capture_dma_ops;
420 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
421 &snd_cs5535audio_playback_ops);
422 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
423 &snd_cs5535audio_capture_ops);
425 pcm->private_data = cs5535au;
427 strcpy(pcm->name, "CS5535 Audio");
429 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
430 snd_dma_pci_data(cs5535au->pci),