Merge master.kernel.org:/pub/scm/linux/kernel/git/dtor/input
[linux-2.6] / 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/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