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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
37static 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
66static 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
93static 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
111static 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
119static 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
145
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
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
175static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
176{
177 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
178}
179
180static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
181{
182 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
183}
184
185static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
186{
187 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
188}
189
190static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
191 u32 prd_addr)
192{
193 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
194}
195
196static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
197{
198 return cs_readl(cs5535au, ACC_BM0_PRD);
199}
200
201static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
202{
203 return cs_readl(cs5535au, ACC_BM0_PNTR);
204}
205
206static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
207{
208 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
209}
210
211static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
212{
213 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
214}
215
216static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
217{
218 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
219}
220
221static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
222 u32 prd_addr)
223{
224 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
225}
226
227static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
228{
229 return cs_readl(cs5535au, ACC_BM1_PRD);
230}
231
232static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
233{
234 return cs_readl(cs5535au, ACC_BM1_PNTR);
235}
236
237static 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
246static 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 if (!err)
264 dma->pcm_open_flag = 1;
265
266 return err;
267}
268
269static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
270{
271 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
272 struct cs5535audio_dma *dma = substream->runtime->private_data;
273
274 if (dma->pcm_open_flag) {
275 if (substream == cs5535au->playback_substream)
276 snd_ac97_update_power(cs5535au->ac97,
277 AC97_PCM_FRONT_DAC_RATE, 0);
278 else
279 snd_ac97_update_power(cs5535au->ac97,
280 AC97_PCM_LR_ADC_RATE, 0);
281 dma->pcm_open_flag = 0;
282 }
283 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
284 return snd_pcm_lib_free_pages(substream);
285}
286
287static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
288{
289 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
290 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
291 substream->runtime->rate);
292}
293
294static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
295{
296 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
297 struct cs5535audio_dma *dma = substream->runtime->private_data;
298 int err = 0;
299
300 spin_lock(&cs5535au->reg_lock);
301 switch (cmd) {
302 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
303 dma->ops->pause_dma(cs5535au);
304 break;
305 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
306 dma->ops->enable_dma(cs5535au);
307 break;
308 case SNDRV_PCM_TRIGGER_START:
309 dma->ops->enable_dma(cs5535au);
310 break;
311 case SNDRV_PCM_TRIGGER_RESUME:
312 dma->ops->enable_dma(cs5535au);
313 break;
314 case SNDRV_PCM_TRIGGER_STOP:
315 dma->ops->disable_dma(cs5535au);
316 break;
317 case SNDRV_PCM_TRIGGER_SUSPEND:
318 dma->ops->disable_dma(cs5535au);
319 break;
320 default:
321 snd_printk(KERN_ERR "unhandled trigger\n");
322 err = -EINVAL;
323 break;
324 }
325 spin_unlock(&cs5535au->reg_lock);
326 return err;
327}
328
329static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
330 *substream)
331{
332 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
333 u32 curdma;
334 struct cs5535audio_dma *dma;
335
336 dma = substream->runtime->private_data;
337 curdma = dma->ops->read_dma_pntr(cs5535au);
338 if (curdma < dma->buf_addr) {
339 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
340 curdma, dma->buf_addr);
341 return 0;
342 }
343 curdma -= dma->buf_addr;
344 if (curdma >= dma->buf_bytes) {
345 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
346 curdma, dma->buf_bytes);
347 return 0;
348 }
349 return bytes_to_frames(substream->runtime, curdma);
350}
351
352static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
353{
354 int err;
355 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
356 struct snd_pcm_runtime *runtime = substream->runtime;
357
358 runtime->hw = snd_cs5535audio_capture;
359 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
360 snd_pcm_limit_hw_rates(runtime);
361 cs5535au->capture_substream = substream;
362 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
363 if ((err = snd_pcm_hw_constraint_integer(runtime,
364 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
365 return err;
366 olpc_capture_open(cs5535au->ac97);
367 return 0;
368}
369
370static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
371{
372 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
373 olpc_capture_close(cs5535au->ac97);
374 return 0;
375}
376
377static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
378{
379 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
380 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
381 substream->runtime->rate);
382}
383
384static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
385 .open = snd_cs5535audio_playback_open,
386 .close = snd_cs5535audio_playback_close,
387 .ioctl = snd_pcm_lib_ioctl,
388 .hw_params = snd_cs5535audio_hw_params,
389 .hw_free = snd_cs5535audio_hw_free,
390 .prepare = snd_cs5535audio_playback_prepare,
391 .trigger = snd_cs5535audio_trigger,
392 .pointer = snd_cs5535audio_pcm_pointer,
393};
394
395static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
396 .open = snd_cs5535audio_capture_open,
397 .close = snd_cs5535audio_capture_close,
398 .ioctl = snd_pcm_lib_ioctl,
399 .hw_params = snd_cs5535audio_hw_params,
400 .hw_free = snd_cs5535audio_hw_free,
401 .prepare = snd_cs5535audio_capture_prepare,
402 .trigger = snd_cs5535audio_trigger,
403 .pointer = snd_cs5535audio_pcm_pointer,
404};
405
406static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
407 .type = CS5535AUDIO_DMA_PLAYBACK,
408 .enable_dma = cs5535audio_playback_enable_dma,
409 .disable_dma = cs5535audio_playback_disable_dma,
410 .setup_prd = cs5535audio_playback_setup_prd,
411 .read_prd = cs5535audio_playback_read_prd,
412 .pause_dma = cs5535audio_playback_pause_dma,
413 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
414};
415
416static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
417 .type = CS5535AUDIO_DMA_CAPTURE,
418 .enable_dma = cs5535audio_capture_enable_dma,
419 .disable_dma = cs5535audio_capture_disable_dma,
420 .setup_prd = cs5535audio_capture_setup_prd,
421 .read_prd = cs5535audio_capture_read_prd,
422 .pause_dma = cs5535audio_capture_pause_dma,
423 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
424};
425
426int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
427{
428 struct snd_pcm *pcm;
429 int err;
430
431 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
432 if (err < 0)
433 return err;
434
435 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
436 &snd_cs5535audio_playback_dma_ops;
437 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
438 &snd_cs5535audio_capture_dma_ops;
439 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
440 &snd_cs5535audio_playback_ops);
441 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
442 &snd_cs5535audio_capture_ops);
443
444 pcm->private_data = cs5535au;
445 pcm->info_flags = 0;
446 strcpy(pcm->name, "CS5535 Audio");
447
448 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
449 snd_dma_pci_data(cs5535au->pci),
450 64*1024, 128*1024);
451 cs5535au->pcm = pcm;
452
453 return 0;
454}
455
456
