[ALSA] Add support for the CS5535 Audio device
[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/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 snd_pcm_hardware_t 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                                 ),
48         .formats =              (
49                                 SNDRV_PCM_FMTBIT_S16_LE
50                                 ),
51         .rates =                (
52                                 SNDRV_PCM_RATE_CONTINUOUS |
53                                 SNDRV_PCM_RATE_8000_48000
54                                 ),
55         .rate_min =             4000,
56         .rate_max =             48000,
57         .channels_min =         2,
58         .channels_max =         2,
59         .buffer_bytes_max =     (128*1024),
60         .period_bytes_min =     64,
61         .period_bytes_max =     (64*1024 - 16),
62         .periods_min =          1,
63         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
64         .fifo_size =            0,
65 };
66
67 static snd_pcm_hardware_t snd_cs5535audio_capture =
68 {
69         .info =                 (
70                                 SNDRV_PCM_INFO_MMAP |
71                                 SNDRV_PCM_INFO_INTERLEAVED |
72                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
73                                 SNDRV_PCM_INFO_MMAP_VALID |
74                                 SNDRV_PCM_INFO_SYNC_START
75                                 ),
76         .formats =              (
77                                 SNDRV_PCM_FMTBIT_S16_LE
78                                 ),
79         .rates =                (
80                                 SNDRV_PCM_RATE_CONTINUOUS |
81                                 SNDRV_PCM_RATE_8000_48000
82                                 ),
83         .rate_min =             4000,
84         .rate_max =             48000,
85         .channels_min =         2,
86         .channels_max =         2,
87         .buffer_bytes_max =     (128*1024),
88         .period_bytes_min =     64,
89         .period_bytes_max =     (64*1024 - 16),
90         .periods_min =          1,
91         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
92         .fifo_size =            0,
93 };
94
95 static int snd_cs5535audio_playback_open(snd_pcm_substream_t *substream)
96 {
97         int err;
98         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
99         snd_pcm_runtime_t *runtime = substream->runtime;
100
101         runtime->hw = snd_cs5535audio_playback;
102         cs5535au->playback_substream = substream;
103         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
104         snd_pcm_set_sync(substream);
105         if ((err = snd_pcm_hw_constraint_integer(runtime,
106                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
107                 return err;
108
109         return 0;
110 }
111
112 static int snd_cs5535audio_playback_close(snd_pcm_substream_t *substream)
113 {
114         return 0;
115 }
116
117 #define CS5535AUDIO_DESC_LIST_SIZE \
118         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(cs5535audio_dma_desc_t))
119
120 static int cs5535audio_build_dma_packets(cs5535audio_t *cs5535au,
121                                         cs5535audio_dma_t *dma,
122                                         snd_pcm_substream_t *substream,
123                                         unsigned int periods,
124                                         unsigned int period_bytes)
125 {
126         unsigned int i;
127         u32 addr, desc_addr, jmpprd_addr;
128         cs5535audio_dma_desc_t *lastdesc;
129
130         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
131                 return -ENOMEM;
132
133         if (dma->desc_buf.area == NULL) {
134                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
135                                         snd_dma_pci_data(cs5535au->pci),
136                                         CS5535AUDIO_DESC_LIST_SIZE+1,
137                                         &dma->desc_buf) < 0)
138                         return -ENOMEM;
139                 dma->period_bytes = dma->periods = 0;
140         }
141
142         if (dma->periods == periods && dma->period_bytes == period_bytes)
143                 return 0;
144
145         /* the u32 cast is okay because in snd*create we succesfully told
146            pci alloc that we're only 32 bit capable so the uppper will be 0 */
147         addr = (u32) substream->runtime->dma_addr;
148         desc_addr = (u32) dma->desc_buf.addr;
149         for (i = 0; i < periods; i++) {
150                 cs5535audio_dma_desc_t *desc =
151                         &((cs5535audio_dma_desc_t *) dma->desc_buf.area)[i];
152                 desc->addr = cpu_to_le32(addr);
153                 desc->size = period_bytes;
154                 desc->ctlreserved = PRD_EOP;
155                 desc_addr += sizeof(cs5535audio_dma_desc_t);
156                 addr += period_bytes;
157         }
158         /* we reserved one dummy descriptor at the end to do the PRD jump */
159         lastdesc = &((cs5535audio_dma_desc_t *) dma->desc_buf.area)[periods];
160         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
161         lastdesc->size = 0;
162         lastdesc->ctlreserved = PRD_JMP;
163         jmpprd_addr = cpu_to_le32(lastdesc->addr +
164                                 (sizeof(cs5535audio_dma_desc_t)*periods));
165
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(cs5535audio_t *cs5535au)
176 {
177         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
178 }
179
180 static void cs5535audio_playback_disable_dma(cs5535audio_t *cs5535au)
181 {
182         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
183 }
184
185 static void cs5535audio_playback_pause_dma(cs5535audio_t *cs5535au)
186 {
187         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
188 }
189
190 static void cs5535audio_playback_setup_prd(cs5535audio_t *cs5535au,
191                                                 u32 prd_addr)
192 {
193         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
194 }
195
196 static u32 cs5535audio_playback_read_dma_pntr(cs5535audio_t *cs5535au)
197 {
198         return cs_readl(cs5535au, ACC_BM0_PNTR);
199 }
200
201 static void cs5535audio_capture_enable_dma(cs5535audio_t *cs5535au)
202 {
203         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
204 }
205
206 static void cs5535audio_capture_disable_dma(cs5535audio_t *cs5535au)
207 {
208         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
209 }
210
211 static void cs5535audio_capture_pause_dma(cs5535audio_t *cs5535au)
212 {
213         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
214 }
215
216 static void cs5535audio_capture_setup_prd(cs5535audio_t *cs5535au,
217                                                 u32 prd_addr)
218 {
219         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
220 }
221
222 static u32 cs5535audio_capture_read_dma_pntr(cs5535audio_t *cs5535au)
223 {
224         return cs_readl(cs5535au, ACC_BM1_PNTR);
225 }
226
227 static void cs5535audio_clear_dma_packets(cs5535audio_t *cs5535au,
228                                         cs5535audio_dma_t *dma,
229                                         snd_pcm_substream_t *substream)
230 {
231         snd_dma_free_pages(&dma->desc_buf);
232         dma->desc_buf.area = NULL;
233 }
234
235 static int snd_cs5535audio_hw_params(snd_pcm_substream_t *substream,
236                                  snd_pcm_hw_params_t *hw_params)
237 {
238         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
239         cs5535audio_dma_t *dma = substream->runtime->private_data;
240         int err;
241
242         err = snd_pcm_lib_malloc_pages(substream,
243                                         params_buffer_bytes(hw_params));
244         if (err < 0)
245                 return err;
246         dma->buf_addr = substream->runtime->dma_addr;
247         dma->buf_bytes = params_buffer_bytes(hw_params);
248
249         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
250                                        params_periods(hw_params),
251                                        params_period_bytes(hw_params));
252         return err;
253 }
254
255 static int snd_cs5535audio_hw_free(snd_pcm_substream_t *substream)
256 {
257         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
258         cs5535audio_dma_t *dma = substream->runtime->private_data;
259
260         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
261         return snd_pcm_lib_free_pages(substream);
262 }
263
264 static int snd_cs5535audio_playback_prepare(snd_pcm_substream_t *substream)
265 {
266         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
267         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
268                                         substream->runtime->rate);
269 }
270
271 static int snd_cs5535audio_trigger(snd_pcm_substream_t *substream, int cmd)
272 {
273         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
274         cs5535audio_dma_t *dma = substream->runtime->private_data;
275
276         switch (cmd) {
277                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
278                         spin_lock_irq(&cs5535au->reg_lock);
279                         dma->ops->pause_dma(cs5535au);
280                         spin_unlock_irq(&cs5535au->reg_lock);
281                         break;
282                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
283                         spin_lock_irq(&cs5535au->reg_lock);
284                         dma->ops->enable_dma(cs5535au);
285                         spin_unlock_irq(&cs5535au->reg_lock);
286                         break;
287                 case SNDRV_PCM_TRIGGER_START:
288                         spin_lock_irq(&cs5535au->reg_lock);
289                         dma->ops->enable_dma(cs5535au);
290                         spin_unlock_irq(&cs5535au->reg_lock);
291                         break;
292                 case SNDRV_PCM_TRIGGER_STOP:
293                         spin_lock_irq(&cs5535au->reg_lock);
294                         dma->ops->disable_dma(cs5535au);
295                         spin_unlock_irq(&cs5535au->reg_lock);
296                         break;
297                 default:
298                         snd_printk(KERN_ERR "unhandled trigger\n");
299                         return -EINVAL;
300                         break;
301         }
302         return 0;
303 }
304
305 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(snd_pcm_substream_t
306                                                         *substream)
307 {
308         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
309         u32 curdma;
310         cs5535audio_dma_t *dma;
311
312         dma = substream->runtime->private_data;
313         curdma = dma->ops->read_dma_pntr(cs5535au);
314         if (curdma < dma->buf_addr) {
315                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
316                                         curdma, dma->buf_addr);
317                 return 0;
318         }
319         curdma -= dma->buf_addr;
320         if (curdma >= dma->buf_bytes) {
321                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
322                                         curdma, dma->buf_bytes);
323                 return 0;
324         }
325         return bytes_to_frames(substream->runtime, curdma);
326 }
327
328 static int snd_cs5535audio_capture_open(snd_pcm_substream_t *substream)
329 {
330         int err;
331         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
332         snd_pcm_runtime_t *runtime = substream->runtime;
333
334         runtime->hw = snd_cs5535audio_capture;
335         cs5535au->capture_substream = substream;
336         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
337         snd_pcm_set_sync(substream);
338         if ((err = snd_pcm_hw_constraint_integer(runtime,
339                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
340                 return err;
341         return 0;
342 }
343
344 static int snd_cs5535audio_capture_close(snd_pcm_substream_t *substream)
345 {
346         return 0;
347 }
348
349 static int snd_cs5535audio_capture_prepare(snd_pcm_substream_t *substream)
350 {
351         cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
352         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
353                                         substream->runtime->rate);
354 }
355
356 static snd_pcm_ops_t snd_cs5535audio_playback_ops = {
357         .open =         snd_cs5535audio_playback_open,
358         .close =        snd_cs5535audio_playback_close,
359         .ioctl =        snd_pcm_lib_ioctl,
360         .hw_params =    snd_cs5535audio_hw_params,
361         .hw_free =      snd_cs5535audio_hw_free,
362         .prepare =      snd_cs5535audio_playback_prepare,
363         .trigger =      snd_cs5535audio_trigger,
364         .pointer =      snd_cs5535audio_pcm_pointer,
365 };
366
367 static snd_pcm_ops_t snd_cs5535audio_capture_ops = {
368         .open =         snd_cs5535audio_capture_open,
369         .close =        snd_cs5535audio_capture_close,
370         .ioctl =        snd_pcm_lib_ioctl,
371         .hw_params =    snd_cs5535audio_hw_params,
372         .hw_free =      snd_cs5535audio_hw_free,
373         .prepare =      snd_cs5535audio_capture_prepare,
374         .trigger =      snd_cs5535audio_trigger,
375         .pointer =      snd_cs5535audio_pcm_pointer,
376 };
377
378 static void snd_cs5535audio_pcm_free(snd_pcm_t *pcm)
379 {
380         snd_pcm_lib_preallocate_free_for_all(pcm);
381 }
382
383 static cs5535audio_dma_ops_t snd_cs5535audio_playback_dma_ops = {
384         .type = CS5535AUDIO_DMA_PLAYBACK,
385         .enable_dma = cs5535audio_playback_enable_dma,
386         .disable_dma = cs5535audio_playback_disable_dma,
387         .setup_prd = cs5535audio_playback_setup_prd,
388         .pause_dma = cs5535audio_playback_pause_dma,
389         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
390 };
391
392 static cs5535audio_dma_ops_t snd_cs5535audio_capture_dma_ops = {
393         .type = CS5535AUDIO_DMA_CAPTURE,
394         .enable_dma = cs5535audio_capture_enable_dma,
395         .disable_dma = cs5535audio_capture_disable_dma,
396         .setup_prd = cs5535audio_capture_setup_prd,
397         .pause_dma = cs5535audio_capture_pause_dma,
398         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
399 };
400
401 int __devinit snd_cs5535audio_pcm(cs5535audio_t *cs5535au)
402 {
403         snd_pcm_t *pcm;
404         int err;
405
406         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
407         if (err < 0)
408                 return err;
409
410         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
411                                         &snd_cs5535audio_playback_dma_ops;
412         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
413                                         &snd_cs5535audio_capture_dma_ops;
414         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
415                                         &snd_cs5535audio_playback_ops);
416         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
417                                         &snd_cs5535audio_capture_ops);
418
419         pcm->private_data = cs5535au;
420         pcm->private_free = snd_cs5535audio_pcm_free;
421         pcm->info_flags = 0;
422         strcpy(pcm->name, "CS5535 Audio");
423
424         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
425                                         snd_dma_pci_data(cs5535au->pci),
426                                         64*1024, 128*1024);
427
428         return 0;
429 }
430