7df5e0826e123fb2659995e5836c313a6aef432e
[linux-2.6.git] / drivers / media / video / saa7134 / saa7134-alsa.c
1 /*
2  *   SAA713x ALSA support for V4L
3  *
4  *
5  *   Caveats:
6  *        - Volume doesn't work (it's always at max)
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, version 2
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */
22
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/wait.h>
27 #include <linux/moduleparam.h>
28 #include <linux/module.h>
29 #include <sound/driver.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/initval.h>
35 #include <linux/interrupt.h>
36
37 #include "saa7134.h"
38 #include "saa7134-reg.h"
39
40 static unsigned int debug  = 0;
41 module_param(debug, int, 0644);
42 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
43
44 /*
45  * Configuration macros
46  */
47
48 /* defaults */
49 #define MIXER_ADDR_TVTUNER      0
50 #define MIXER_ADDR_LINE1        1
51 #define MIXER_ADDR_LINE2        2
52 #define MIXER_ADDR_LAST         2
53
54
55 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
56 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
57 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
58
59 module_param_array(index, int, NULL, 0444);
60 module_param_array(enable, int, NULL, 0444);
61 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
62 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
63
64 #define dprintk(fmt, arg...)    if (debug) \
65         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
66
67
68
69 /*
70  * Main chip structure
71  */
72
73 typedef struct snd_card_saa7134 {
74         snd_card_t *card;
75         spinlock_t mixer_lock;
76         int mixer_volume[MIXER_ADDR_LAST+1][2];
77         int capture_source[MIXER_ADDR_LAST+1][2];
78         struct pci_dev *pci;
79         struct saa7134_dev *dev;
80
81         unsigned long iobase;
82         int irq;
83
84         spinlock_t lock;
85 } snd_card_saa7134_t;
86
87
88
89 /*
90  * PCM structure
91  */
92
93 typedef struct snd_card_saa7134_pcm {
94         struct saa7134_dev *dev;
95
96         spinlock_t lock;
97
98         snd_pcm_substream_t *substream;
99 } snd_card_saa7134_pcm_t;
100
101 static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
102
103
104 /*
105  * saa7134 DMA audio stop
106  *
107  *   Called when the capture device is released or the buffer overflows
108  *
109  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
110  *
111  */
112
113 static void saa7134_dma_stop(struct saa7134_dev *dev)
114 {
115         dev->dmasound.dma_blk     = -1;
116         dev->dmasound.dma_running = 0;
117         saa7134_set_dmabits(dev);
118 }
119
120 /*
121  * saa7134 DMA audio start
122  *
123  *   Called when preparing the capture device for use
124  *
125  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
126  *
127  */
128
129 static void saa7134_dma_start(struct saa7134_dev *dev)
130 {
131         dev->dmasound.dma_blk     = 0;
132         dev->dmasound.dma_running = 1;
133         saa7134_set_dmabits(dev);
134 }
135
136 /*
137  * saa7134 audio DMA IRQ handler
138  *
139  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
140  *   Handles shifting between the 2 buffers, manages the read counters,
141  *  and notifies ALSA when periods elapse
142  *
143  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
144  *
145  */
146
147 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
148                                   unsigned long status)
149 {
150         int next_blk, reg = 0;
151
152         spin_lock(&dev->slock);
153         if (UNSET == dev->dmasound.dma_blk) {
154                 dprintk("irq: recording stopped\n");
155                 goto done;
156         }
157         if (0 != (status & 0x0f000000))
158                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
159         if (0 == (status & 0x10000000)) {
160                 /* odd */
161                 if (0 == (dev->dmasound.dma_blk & 0x01))
162                         reg = SAA7134_RS_BA1(6);
163         } else {
164                 /* even */
165                 if (1 == (dev->dmasound.dma_blk & 0x01))
166                         reg = SAA7134_RS_BA2(6);
167         }
168         if (0 == reg) {
169                 dprintk("irq: field oops [%s]\n",
170                         (status & 0x10000000) ? "even" : "odd");
171                 goto done;
172         }
173
174         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
175                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
176                         dev->dmasound.bufsize, dev->dmasound.blocks);
177                 spin_unlock(&dev->slock);
178                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
179                 return;
180         }
181
182         /* next block addr */
183         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
184         saa_writel(reg,next_blk * dev->dmasound.blksize);
185         if (debug > 2)
186                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
187                         (status & 0x10000000) ? "even" : "odd ", next_blk,
188                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
189
190         /* update status & wake waiting readers */
191         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
192         dev->dmasound.read_count += dev->dmasound.blksize;
193
194         dev->dmasound.recording_on = reg;
195
196         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
197                 spin_unlock(&dev->slock);
198                 snd_pcm_period_elapsed(dev->dmasound.substream);
199                 spin_lock(&dev->slock);
200         }
201
202  done:
203         spin_unlock(&dev->slock);
204
205 }
206
207 /*
208  * IRQ request handler
209  *
210  *   Runs along with saa7134's IRQ handler, discards anything that isn't
211  *   DMA sound
212  *
213  */
214
215 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
216 {
217         struct saa7134_dmasound *dmasound = dev_id;
218         struct saa7134_dev *dev = dmasound->priv_data;
219
220         unsigned long report, status;
221         int loop, handled = 0;
222
223         for (loop = 0; loop < 10; loop++) {
224                 report = saa_readl(SAA7134_IRQ_REPORT);
225                 status = saa_readl(SAA7134_IRQ_STATUS);
226
227                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
228                         handled = 1;
229                         saa_writel(SAA7134_IRQ_REPORT,report);
230                         saa7134_irq_alsa_done(dev, status);
231                 } else {
232                         goto out;
233                 }
234         }
235
236         if (loop == 10) {
237                 dprintk("error! looping IRQ!");
238         }
239
240 out:
241         return IRQ_RETVAL(handled);
242 }
243
244 /*
245  * ALSA capture trigger
246  *
247  *   - One of the ALSA capture callbacks.
248  *
249  *   Called whenever a capture is started or stopped. Must be defined,
250  *   but there's nothing we want to do here
251  *
252  */
253
254 static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
255                                           int cmd)
256 {
257         snd_pcm_runtime_t *runtime = substream->runtime;
258         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
259         struct saa7134_dev *dev=pcm->dev;
260         int err = 0;
261
262         spin_lock(&dev->slock);
263         if (cmd == SNDRV_PCM_TRIGGER_START) {
264                 /* start dma */
265                 saa7134_dma_start(dev);
266         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
267                 /* stop dma */
268                 saa7134_dma_stop(dev);
269         } else {
270                 err = -EINVAL;
271         }
272         spin_unlock(&dev->slock);
273
274         return err;
275 }
276
277 /*
278  * DMA buffer initialization
279  *
280  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
281  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
282  *  usage of V4L's
283  *
284  *   - Copied verbatim from saa7134-oss.
285  *
286  */
287
288 static int dsp_buffer_init(struct saa7134_dev *dev)
289 {
290         int err;
291
292         BUG_ON(!dev->dmasound.bufsize);
293
294         videobuf_dma_init(&dev->dmasound.dma);
295         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
296                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
297         if (0 != err)
298                 return err;
299         return 0;
300 }
301
302 /*
303  * DMA buffer release
304  *
305  *   Called after closing the device, during snd_card_saa7134_capture_close
306  *
307  */
308
309 static int dsp_buffer_free(struct saa7134_dev *dev)
310 {
311         if (!dev->dmasound.blksize)
312                 BUG();
313
314         videobuf_dma_free(&dev->dmasound.dma);
315
316         dev->dmasound.blocks  = 0;
317         dev->dmasound.blksize = 0;
318         dev->dmasound.bufsize = 0;
319
320        return 0;
321 }
322
323
324 /*
325  * ALSA PCM preparation
326  *
327  *   - One of the ALSA capture callbacks.
328  *
329  *   Called right after the capture device is opened, this function configures
330  *  the buffer using the previously defined functions, allocates the memory,
331  *  sets up the hardware registers, and then starts the DMA. When this function
332  *  returns, the audio should be flowing.
333  *
334  */
335
336 static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
337 {
338         snd_pcm_runtime_t *runtime = substream->runtime;
339         int bswap, sign;
340         u32 fmt, control;
341         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
342         struct saa7134_dev *dev;
343         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
344
345         pcm->dev->dmasound.substream = substream;
346
347         dev = saa7134->dev;
348
349         if (snd_pcm_format_width(runtime->format) == 8)
350                 fmt = 0x00;
351         else
352                 fmt = 0x01;
353
354         if (snd_pcm_format_signed(runtime->format))
355                 sign = 1;
356         else
357                 sign = 0;
358
359         if (snd_pcm_format_big_endian(runtime->format))
360                 bswap = 1;
361         else
362                 bswap = 0;
363
364         switch (dev->pci->device) {
365           case PCI_DEVICE_ID_PHILIPS_SAA7134:
366                 if (1 == runtime->channels)
367                         fmt |= (1 << 3);
368                 if (2 == runtime->channels)
369                         fmt |= (3 << 3);
370                 if (sign)
371                         fmt |= 0x04;
372
373                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
374                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
375                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
376                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
377                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
378
379                 break;
380           case PCI_DEVICE_ID_PHILIPS_SAA7133:
381           case PCI_DEVICE_ID_PHILIPS_SAA7135:
382                 if (1 == runtime->channels)
383                         fmt |= (1 << 4);
384                 if (2 == runtime->channels)
385                         fmt |= (2 << 4);
386                 if (!sign)
387                         fmt |= 0x04;
388                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
389                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
390                 break;
391         }
392
393         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
394                 runtime->format, runtime->channels, fmt,
395                 bswap ? 'b' : '-');
396         /* dma: setup channel 6 (= AUDIO) */
397         control = SAA7134_RS_CONTROL_BURST_16 |
398                 SAA7134_RS_CONTROL_ME |
399                 (dev->dmasound.pt.dma >> 12);
400         if (bswap)
401                 control |= SAA7134_RS_CONTROL_BSWAP;
402
403         saa_writel(SAA7134_RS_BA1(6),0);
404         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
405         saa_writel(SAA7134_RS_PITCH(6),0);
406         saa_writel(SAA7134_RS_CONTROL(6),control);
407
408         dev->dmasound.rate = runtime->rate;
409
410         return 0;
411
412 }
413
414 /*
415  * ALSA pointer fetching
416  *
417  *   - One of the ALSA capture callbacks.
418  *
419  *   Called whenever a period elapses, it must return the current hardware
420  *  position of the buffer.
421  *   Also resets the read counter used to prevent overruns
422  *
423  */
424
425 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
426 {
427         snd_pcm_runtime_t *runtime = substream->runtime;
428         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
429         struct saa7134_dev *dev=pcm->dev;
430
431         if (dev->dmasound.read_count) {
432                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
433                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
434                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
435                         dev->dmasound.read_offset = 0;
436         }
437
438         return bytes_to_frames(runtime, dev->dmasound.read_offset);
439 }
440
441 /*
442  * ALSA hardware capabilities definition
443  */
444
445 static snd_pcm_hardware_t snd_card_saa7134_capture =
446 {
447         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
448                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
449                                  SNDRV_PCM_INFO_MMAP_VALID),
450         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
451                                 SNDRV_PCM_FMTBIT_S16_BE | \
452                                 SNDRV_PCM_FMTBIT_S8 | \
453                                 SNDRV_PCM_FMTBIT_U8 | \
454                                 SNDRV_PCM_FMTBIT_U16_LE | \
455                                 SNDRV_PCM_FMTBIT_U16_BE,
456         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
457         .rate_min =             32000,
458         .rate_max =             48000,
459         .channels_min =         1,
460         .channels_max =         2,
461         .buffer_bytes_max =     (256*1024),
462         .period_bytes_min =     64,
463         .period_bytes_max =     (256*1024),
464         .periods_min =          2,
465         .periods_max =          1024,
466 };
467
468 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
469 {
470         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
471
472         kfree(pcm);
473 }
474
475
476 /*
477  * ALSA hardware params
478  *
479  *   - One of the ALSA capture callbacks.
480  *
481  *   Called on initialization, right before the PCM preparation
482  *
483  */
484
485 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
486                                     snd_pcm_hw_params_t * hw_params)
487 {
488         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
489         struct saa7134_dev *dev;
490         unsigned int period_size, periods;
491         int err;
492
493         period_size = params_period_bytes(hw_params);
494         periods = params_periods(hw_params);
495
496         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
497                    return -EINVAL);
498         snd_assert(periods >= 2, return -EINVAL);
499         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
500
501         dev = saa7134->dev;
502
503         if (dev->dmasound.blocks == periods &&
504             dev->dmasound.blksize == period_size)
505                 return 0;
506
507         /* release the old buffer */
508         if (substream->runtime->dma_area) {
509                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
510                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
511                 dsp_buffer_free(dev);
512                 substream->runtime->dma_area = NULL;
513         }
514         dev->dmasound.blocks  = periods;
515         dev->dmasound.blksize = period_size;
516         dev->dmasound.bufsize = period_size * periods;
517
518         err = dsp_buffer_init(dev);
519         if (0 != err) {
520                 dev->dmasound.blocks  = 0;
521                 dev->dmasound.blksize = 0;
522                 dev->dmasound.bufsize = 0;
523                 return err;
524         }
525
526         if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
527                 dsp_buffer_free(dev);
528                 return err;
529         }
530         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
531                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
532                 dsp_buffer_free(dev);
533                 return err;
534         }
535         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
536                                                 dev->dmasound.dma.sglist,
537                                                 dev->dmasound.dma.sglen,
538                                                 0))) {
539                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
540                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
541                 dsp_buffer_free(dev);
542                 return err;
543         }
544
545         /* I should be able to use runtime->dma_addr in the control
546            byte, but it doesn't work. So I allocate the DMA using the
547            V4L functions, and force ALSA to use that as the DMA area */
548
549         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
550
551         return 1;
552
553 }
554
555 /*
556  * ALSA hardware release
557  *
558  *   - One of the ALSA capture callbacks.
559  *
560  *   Called after closing the device, but before snd_card_saa7134_capture_close
561  *   It stops the DMA audio and releases the buffers.
562  *
563  */
564
565 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
566 {
567         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
568         struct saa7134_dev *dev;
569
570         dev = saa7134->dev;
571
572         if (substream->runtime->dma_area) {
573                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
574                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
575                 dsp_buffer_free(dev);
576                 substream->runtime->dma_area = NULL;
577         }
578
579         return 0;
580 }
581
582 /*
583  * ALSA capture finish
584  *
585  *   - One of the ALSA capture callbacks.
586  *
587  *   Called after closing the device.
588  *
589  */
590
591 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
592 {
593         return 0;
594 }
595
596 /*
597  * ALSA capture start
598  *
599  *   - One of the ALSA capture callbacks.
600  *
601  *   Called when opening the device. It creates and populates the PCM
602  *  structure
603  *
604  */
605
606 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
607 {
608         snd_pcm_runtime_t *runtime = substream->runtime;
609         snd_card_saa7134_pcm_t *pcm;
610         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
611         struct saa7134_dev *dev = saa7134->dev;
612         int err;
613
614         down(&dev->dmasound.lock);
615
616         dev->dmasound.read_count  = 0;
617         dev->dmasound.read_offset = 0;
618
619         up(&dev->dmasound.lock);
620
621         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
622         if (pcm == NULL)
623                 return -ENOMEM;
624
625         pcm->dev=saa7134->dev;
626
627         spin_lock_init(&pcm->lock);
628
629         pcm->substream = substream;
630         runtime->private_data = pcm;
631         runtime->private_free = snd_card_saa7134_runtime_free;
632         runtime->hw = snd_card_saa7134_capture;
633
634         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
635                 return err;
636
637         return 0;
638 }
639
640 /*
641  * ALSA capture callbacks definition
642  */
643
644 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
645         .open =                 snd_card_saa7134_capture_open,
646         .close =                snd_card_saa7134_capture_close,
647         .ioctl =                snd_pcm_lib_ioctl,
648         .hw_params =            snd_card_saa7134_hw_params,
649         .hw_free =              snd_card_saa7134_hw_free,
650         .prepare =              snd_card_saa7134_capture_prepare,
651         .trigger =              snd_card_saa7134_capture_trigger,
652         .pointer =              snd_card_saa7134_capture_pointer,
653 };
654
655 /*
656  * ALSA PCM setup
657  *
658  *   Called when initializing the board. Sets up the name and hooks up
659  *  the callbacks
660  *
661  */
662
663 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
664 {
665         snd_pcm_t *pcm;
666         int err;
667
668         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
669                 return err;
670         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
671         pcm->private_data = saa7134;
672         pcm->info_flags = 0;
673         strcpy(pcm->name, "SAA7134 PCM");
674         return 0;
675 }
676
677 #define SAA713x_VOLUME(xname, xindex, addr) \
678 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
679   .info = snd_saa7134_volume_info, \
680   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
681   .private_value = addr }
682
683 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
684 {
685         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
686         uinfo->count = 2;
687         uinfo->value.integer.min = 0;
688         uinfo->value.integer.max = 20;
689         return 0;
690 }
691
692 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
693 {
694         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
695         int addr = kcontrol->private_value;
696
697         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
698         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
699         return 0;
700 }
701
702 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
703 {
704         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
705         int change, addr = kcontrol->private_value;
706         int left, right;
707
708         left = ucontrol->value.integer.value[0];
709         if (left < 0)
710                 left = 0;
711         if (left > 20)
712                 left = 20;
713         right = ucontrol->value.integer.value[1];
714         if (right < 0)
715                 right = 0;
716         if (right > 20)
717                 right = 20;
718         spin_lock_irq(&chip->mixer_lock);
719         change = chip->mixer_volume[addr][0] != left ||
720                  chip->mixer_volume[addr][1] != right;
721         chip->mixer_volume[addr][0] = left;
722         chip->mixer_volume[addr][1] = right;
723         spin_unlock_irq(&chip->mixer_lock);
724         return change;
725 }
726
727 #define SAA713x_CAPSRC(xname, xindex, addr) \
728 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
729   .info = snd_saa7134_capsrc_info, \
730   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
731   .private_value = addr }
732
733 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
734 {
735         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
736         uinfo->count = 2;
737         uinfo->value.integer.min = 0;
738         uinfo->value.integer.max = 1;
739         return 0;
740 }
741
742 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
743 {
744         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
745         int addr = kcontrol->private_value;
746
747         spin_lock_irq(&chip->mixer_lock);
748         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
749         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
750         spin_unlock_irq(&chip->mixer_lock);
751
752         return 0;
753 }
754
755 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
756 {
757         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
758         int change, addr = kcontrol->private_value;
759         int left, right;
760         u32 anabar, xbarin;
761         int analog_io, rate;
762         struct saa7134_dev *dev;
763
764         dev = chip->dev;
765
766         left = ucontrol->value.integer.value[0] & 1;
767         right = ucontrol->value.integer.value[1] & 1;
768         spin_lock_irq(&chip->mixer_lock);
769
770         change = chip->capture_source[addr][0] != left ||
771                  chip->capture_source[addr][1] != right;
772         chip->capture_source[addr][0] = left;
773         chip->capture_source[addr][1] = right;
774         dev->dmasound.input=addr;
775         spin_unlock_irq(&chip->mixer_lock);
776
777
778         if (change) {
779           switch (dev->pci->device) {
780
781            case PCI_DEVICE_ID_PHILIPS_SAA7134:
782                 switch (addr) {
783                         case MIXER_ADDR_TVTUNER:
784                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
785                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
786                                 break;
787                         case MIXER_ADDR_LINE1:
788                         case MIXER_ADDR_LINE2:
789                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
790                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
791                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
792                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
793                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
794                                 break;
795                 }
796
797                 break;
798            case PCI_DEVICE_ID_PHILIPS_SAA7133:
799            case PCI_DEVICE_ID_PHILIPS_SAA7135:
800                 xbarin = 0x03; // adc
801                 anabar = 0;
802                 switch (addr) {
803                         case MIXER_ADDR_TVTUNER:
804                                 xbarin = 0; // Demodulator
805                                 anabar = 2; // DACs
806                                 break;
807                         case MIXER_ADDR_LINE1:
808                                 anabar = 0;  // aux1, aux1
809                                 break;
810                         case MIXER_ADDR_LINE2:
811                                 anabar = 9;  // aux2, aux2
812                                 break;
813                 }
814
815                 /* output xbar always main channel */
816                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
817
818                 if (left || right) { // We've got data, turn the input on
819                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
820                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
821                 } else {
822                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
823                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
824                 }
825                 break;
826           }
827         }
828
829         return change;
830 }
831
832 static snd_kcontrol_new_t snd_saa7134_controls[] = {
833 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
834 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
835 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
836 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
837 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
838 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
839 };
840
841 /*
842  * ALSA mixer setup
843  *
844  *   Called when initializing the board. Sets up the name and hooks up
845  *  the callbacks
846  *
847  */
848
849 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
850 {
851         snd_card_t *card = chip->card;
852         unsigned int idx;
853         int err;
854
855         snd_assert(chip != NULL, return -EINVAL);
856         strcpy(card->mixername, "SAA7134 Mixer");
857
858         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
859                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
860                         return err;
861         }
862         return 0;
863 }
864
865 static void snd_saa7134_free(snd_card_t * card)
866 {
867         snd_card_saa7134_t *chip = card->private_data;
868
869         if (chip->dev->dmasound.priv_data == NULL)
870                 return;
871
872         if (chip->irq >= 0) {
873                 synchronize_irq(chip->irq);
874                 free_irq(chip->irq, &chip->dev->dmasound);
875         }
876
877         chip->dev->dmasound.priv_data = NULL;
878
879 }
880
881 /*
882  * ALSA initialization
883  *
884  *   Called by the init routine, once for each saa7134 device present,
885  *  it creates the basic structures and registers the ALSA devices
886  *
887  */
888
889 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
890 {
891
892         snd_card_t *card;
893         snd_card_saa7134_t *chip;
894         int err;
895
896
897         if (devnum >= SNDRV_CARDS)
898                 return -ENODEV;
899         if (!enable[devnum])
900                 return -ENODEV;
901
902         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
903
904         if (card == NULL)
905                 return -ENOMEM;
906
907         strcpy(card->driver, "SAA7134");
908
909         /* Card "creation" */
910
911         card->private_free = snd_saa7134_free;
912         chip = (snd_card_saa7134_t *) card->private_data;
913
914         spin_lock_init(&chip->lock);
915         spin_lock_init(&chip->mixer_lock);
916
917         chip->dev = dev;
918
919         chip->card = card;
920
921         chip->pci = dev->pci;
922         chip->iobase = pci_resource_start(dev->pci, 0);
923
924
925         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
926                                 SA_SHIRQ | SA_INTERRUPT, dev->name,
927                                 (void*) &dev->dmasound);
928
929         if (err < 0) {
930                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
931                         dev->name, dev->pci->irq);
932                 goto __nodev;
933         }
934
935         chip->irq = dev->pci->irq;
936
937         init_MUTEX(&dev->dmasound.lock);
938
939         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
940                 goto __nodev;
941
942         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
943                 goto __nodev;
944
945         snd_card_set_dev(card, &chip->pci->dev);
946
947         /* End of "creation" */
948
949         strcpy(card->shortname, "SAA7134");
950         sprintf(card->longname, "%s at 0x%lx irq %d",
951                 chip->dev->name, chip->iobase, chip->irq);
952
953         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
954
955         if ((err = snd_card_register(card)) == 0) {
956                 snd_saa7134_cards[devnum] = card;
957                 return 0;
958         }
959
960 __nodev:
961         snd_card_free(card);
962         return err;
963 }
964
965
966 static int alsa_device_init(struct saa7134_dev *dev)
967 {
968         dev->dmasound.priv_data = dev;
969         alsa_card_saa7134_create(dev,dev->nr);
970         return 1;
971 }
972
973 static int alsa_device_exit(struct saa7134_dev *dev)
974 {
975
976         snd_card_free(snd_saa7134_cards[dev->nr]);
977         snd_saa7134_cards[dev->nr] = NULL;
978         return 1;
979 }
980
981 /*
982  * Module initializer
983  *
984  * Loops through present saa7134 cards, and assigns an ALSA device
985  * to each one
986  *
987  */
988
989 static int saa7134_alsa_init(void)
990 {
991         struct saa7134_dev *dev = NULL;
992         struct list_head *list;
993
994         if (!dmasound_init && !dmasound_exit) {
995                 dmasound_init = alsa_device_init;
996                 dmasound_exit = alsa_device_exit;
997         } else {
998                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
999                 return -EBUSY;
1000         }
1001
1002         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1003
1004         list_for_each(list,&saa7134_devlist) {
1005                 dev = list_entry(list, struct saa7134_dev, devlist);
1006                 if (dev->dmasound.priv_data == NULL) {
1007                         alsa_device_init(dev);
1008                 } else {
1009                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1010                         return -EBUSY;
1011                 }
1012         }
1013
1014         if (dev == NULL)
1015                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1016
1017         return 0;
1018
1019 }
1020
1021 /*
1022  * Module destructor
1023  */
1024
1025 static void saa7134_alsa_exit(void)
1026 {
1027         int idx;
1028
1029         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1030                 snd_card_free(snd_saa7134_cards[idx]);
1031         }
1032
1033         dmasound_init = NULL;
1034         dmasound_exit = NULL;
1035         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1036
1037         return;
1038 }
1039
1040 /* We initialize this late, to make sure the sound system is up and running */
1041 late_initcall(saa7134_alsa_init);
1042 module_exit(saa7134_alsa_exit);
1043 MODULE_LICENSE("GPL");
1044 MODULE_AUTHOR("Ricardo Cerqueira");
1045
1046
1047