Merge branch 'topic/hda' into for-linus
[linux-2.6.git] / sound / pci / cs5535audio / cs5535audio_pcm.c
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         if (!err)
264                 dma->pcm_open_flag = 1;
265
266         return err;
267 }
268
269 static 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
287 static 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
294 static 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
329 static 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
352 static 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
370 static 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
377 static 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
384 static 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
395 static 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
406 static 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
416 static 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
426 int __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