Merge branches 'release' and 'hp-cid' into release
[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/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         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                 break;
302         case SNDRV_PCM_TRIGGER_STOP:
303                 dma->ops->disable_dma(cs5535au);
304                 break;
305         case SNDRV_PCM_TRIGGER_SUSPEND:
306                 dma->ops->disable_dma(cs5535au);
307                 break;
308         default:
309                 snd_printk(KERN_ERR "unhandled trigger\n");
310                 err = -EINVAL;
311                 break;
312         }
313         spin_unlock(&cs5535au->reg_lock);
314         return err;
315 }
316
317 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
318                                                         *substream)
319 {
320         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
321         u32 curdma;
322         struct cs5535audio_dma *dma;
323
324         dma = substream->runtime->private_data;
325         curdma = dma->ops->read_dma_pntr(cs5535au);
326         if (curdma < dma->buf_addr) {
327                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
328                                         curdma, dma->buf_addr);
329                 return 0;
330         }
331         curdma -= dma->buf_addr;
332         if (curdma >= dma->buf_bytes) {
333                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
334                                         curdma, dma->buf_bytes);
335                 return 0;
336         }
337         return bytes_to_frames(substream->runtime, curdma);
338 }
339
340 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
341 {
342         int err;
343         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
344         struct snd_pcm_runtime *runtime = substream->runtime;
345
346         runtime->hw = snd_cs5535audio_capture;
347         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
348         snd_pcm_limit_hw_rates(runtime);
349         cs5535au->capture_substream = substream;
350         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
351         if ((err = snd_pcm_hw_constraint_integer(runtime,
352                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
353                 return err;
354         return 0;
355 }
356
357 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
358 {
359         return 0;
360 }
361
362 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
363 {
364         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
365         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
366                                  substream->runtime->rate);
367 }
368
369 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
370         .open =         snd_cs5535audio_playback_open,
371         .close =        snd_cs5535audio_playback_close,
372         .ioctl =        snd_pcm_lib_ioctl,
373         .hw_params =    snd_cs5535audio_hw_params,
374         .hw_free =      snd_cs5535audio_hw_free,
375         .prepare =      snd_cs5535audio_playback_prepare,
376         .trigger =      snd_cs5535audio_trigger,
377         .pointer =      snd_cs5535audio_pcm_pointer,
378 };
379
380 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
381         .open =         snd_cs5535audio_capture_open,
382         .close =        snd_cs5535audio_capture_close,
383         .ioctl =        snd_pcm_lib_ioctl,
384         .hw_params =    snd_cs5535audio_hw_params,
385         .hw_free =      snd_cs5535audio_hw_free,
386         .prepare =      snd_cs5535audio_capture_prepare,
387         .trigger =      snd_cs5535audio_trigger,
388         .pointer =      snd_cs5535audio_pcm_pointer,
389 };
390
391 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
392         .type = CS5535AUDIO_DMA_PLAYBACK,
393         .enable_dma = cs5535audio_playback_enable_dma,
394         .disable_dma = cs5535audio_playback_disable_dma,
395         .setup_prd = cs5535audio_playback_setup_prd,
396         .read_prd = cs5535audio_playback_read_prd,
397         .pause_dma = cs5535audio_playback_pause_dma,
398         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
399 };
400
401 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
402         .type = CS5535AUDIO_DMA_CAPTURE,
403         .enable_dma = cs5535audio_capture_enable_dma,
404         .disable_dma = cs5535audio_capture_disable_dma,
405         .setup_prd = cs5535audio_capture_setup_prd,
406         .read_prd = cs5535audio_capture_read_prd,
407         .pause_dma = cs5535audio_capture_pause_dma,
408         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
409 };
410
411 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
412 {
413         struct snd_pcm *pcm;
414         int err;
415
416         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
417         if (err < 0)
418                 return err;
419
420         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
421                                         &snd_cs5535audio_playback_dma_ops;
422         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
423                                         &snd_cs5535audio_capture_dma_ops;
424         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
425                                         &snd_cs5535audio_playback_ops);
426         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
427                                         &snd_cs5535audio_capture_ops);
428
429         pcm->private_data = cs5535au;
430         pcm->info_flags = 0;
431         strcpy(pcm->name, "CS5535 Audio");
432
433         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
434                                         snd_dma_pci_data(cs5535au->pci),
435                                         64*1024, 128*1024);
436         cs5535au->pcm = pcm;
437
438         return 0;
439 }
440