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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-alsa.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-alsa.c1209
1 files changed, 1209 insertions, 0 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
new file mode 100644
index 00000000000..10460fd3ce3
--- /dev/null
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -0,0 +1,1209 @@
1/*
2 * SAA713x ALSA support for V4L
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, version 2
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 */
18
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/time.h>
22#include <linux/wait.h>
23#include <linux/module.h>
24#include <sound/core.h>
25#include <sound/control.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include <sound/initval.h>
29#include <linux/interrupt.h>
30
31#include "saa7134.h"
32#include "saa7134-reg.h"
33
34static unsigned int debug;
35module_param(debug, int, 0644);
36MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
37
38/*
39 * Configuration macros
40 */
41
42/* defaults */
43#define MIXER_ADDR_UNSELECTED -1
44#define MIXER_ADDR_TVTUNER 0
45#define MIXER_ADDR_LINE1 1
46#define MIXER_ADDR_LINE2 2
47#define MIXER_ADDR_LAST 2
48
49
50static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
51static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
52static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
53
54module_param_array(index, int, NULL, 0444);
55module_param_array(enable, int, NULL, 0444);
56MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
57MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
58
59#define dprintk(fmt, arg...) if (debug) \
60 printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
61
62
63
64/*
65 * Main chip structure
66 */
67
68typedef struct snd_card_saa7134 {
69 struct snd_card *card;
70 spinlock_t mixer_lock;
71 int mixer_volume[MIXER_ADDR_LAST+1][2];
72 int capture_source_addr;
73 int capture_source[2];
74 struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
75 struct pci_dev *pci;
76 struct saa7134_dev *dev;
77
78 unsigned long iobase;
79 s16 irq;
80 u16 mute_was_on;
81
82 spinlock_t lock;
83} snd_card_saa7134_t;
84
85
86/*
87 * PCM structure
88 */
89
90typedef struct snd_card_saa7134_pcm {
91 struct saa7134_dev *dev;
92
93 spinlock_t lock;
94
95 struct snd_pcm_substream *substream;
96} snd_card_saa7134_pcm_t;
97
98static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
99
100
101/*
102 * saa7134 DMA audio stop
103 *
104 * Called when the capture device is released or the buffer overflows
105 *
106 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
107 *
108 */
109
110static void saa7134_dma_stop(struct saa7134_dev *dev)
111{
112 dev->dmasound.dma_blk = -1;
113 dev->dmasound.dma_running = 0;
114 saa7134_set_dmabits(dev);
115}
116
117/*
118 * saa7134 DMA audio start
119 *
120 * Called when preparing the capture device for use
121 *
122 * - Copied verbatim from saa7134-oss's dsp_dma_start.
123 *
124 */
125
126static void saa7134_dma_start(struct saa7134_dev *dev)
127{
128 dev->dmasound.dma_blk = 0;
129 dev->dmasound.dma_running = 1;
130 saa7134_set_dmabits(dev);
131}
132
133/*
134 * saa7134 audio DMA IRQ handler
135 *
136 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
137 * Handles shifting between the 2 buffers, manages the read counters,
138 * and notifies ALSA when periods elapse
139 *
140 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
141 *
142 */
143
144static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
145 unsigned long status)
146{
147 int next_blk, reg = 0;
148
149 spin_lock(&dev->slock);
150 if (UNSET == dev->dmasound.dma_blk) {
151 dprintk("irq: recording stopped\n");
152 goto done;
153 }
154 if (0 != (status & 0x0f000000))
155 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
156 if (0 == (status & 0x10000000)) {
157 /* odd */
158 if (0 == (dev->dmasound.dma_blk & 0x01))
159 reg = SAA7134_RS_BA1(6);
160 } else {
161 /* even */
162 if (1 == (dev->dmasound.dma_blk & 0x01))
163 reg = SAA7134_RS_BA2(6);
164 }
165 if (0 == reg) {
166 dprintk("irq: field oops [%s]\n",
167 (status & 0x10000000) ? "even" : "odd");
168 goto done;
169 }
170
171 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
172 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
173 dev->dmasound.bufsize, dev->dmasound.blocks);
174 spin_unlock(&dev->slock);
175 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
176 return;
177 }
178
179 /* next block addr */
180 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
181 saa_writel(reg,next_blk * dev->dmasound.blksize);
182 if (debug > 2)
183 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
184 (status & 0x10000000) ? "even" : "odd ", next_blk,
185 next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
186
187 /* update status & wake waiting readers */
188 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
189 dev->dmasound.read_count += dev->dmasound.blksize;
190
191 dev->dmasound.recording_on = reg;
192
193 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
194 spin_unlock(&dev->slock);
195 snd_pcm_period_elapsed(dev->dmasound.substream);
196 spin_lock(&dev->slock);
197 }
198
199 done:
200 spin_unlock(&dev->slock);
201
202}
203
204/*
205 * IRQ request handler
206 *
207 * Runs along with saa7134's IRQ handler, discards anything that isn't
208 * DMA sound
209 *
210 */
211
212static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
213{
214 struct saa7134_dmasound *dmasound = dev_id;
215 struct saa7134_dev *dev = dmasound->priv_data;
216
217 unsigned long report, status;
218 int loop, handled = 0;
219
220 for (loop = 0; loop < 10; loop++) {
221 report = saa_readl(SAA7134_IRQ_REPORT);
222 status = saa_readl(SAA7134_IRQ_STATUS);
223
224 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
225 handled = 1;
226 saa_writel(SAA7134_IRQ_REPORT,
227 SAA7134_IRQ_REPORT_DONE_RA3);
228 saa7134_irq_alsa_done(dev, status);
229 } else {
230 goto out;
231 }
232 }
233
234 if (loop == 10) {
235 dprintk("error! looping IRQ!");
236 }
237
238out:
239 return IRQ_RETVAL(handled);
240}
241
242/*
243 * ALSA capture trigger
244 *
245 * - One of the ALSA capture callbacks.
246 *
247 * Called whenever a capture is started or stopped. Must be defined,
248 * but there's nothing we want to do here
249 *
250 */
251
252static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
253 int cmd)
254{
255 struct snd_pcm_runtime *runtime = substream->runtime;
256 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
257 struct saa7134_dev *dev=pcm->dev;
258 int err = 0;
259
260 spin_lock(&dev->slock);
261 if (cmd == SNDRV_PCM_TRIGGER_START) {
262 /* start dma */
263 saa7134_dma_start(dev);
264 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
265 /* stop dma */
266 saa7134_dma_stop(dev);
267 } else {
268 err = -EINVAL;
269 }
270 spin_unlock(&dev->slock);
271
272 return err;
273}
274
275/*
276 * DMA buffer initialization
277 *
278 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in
279 * ALSA, but I was unable to use ALSA's own DMA, and had to force the
280 * usage of V4L's
281 *
282 * - Copied verbatim from saa7134-oss.
283 *
284 */
285
286static int dsp_buffer_init(struct saa7134_dev *dev)
287{
288 int err;
289
290 BUG_ON(!dev->dmasound.bufsize);
291
292 videobuf_dma_init(&dev->dmasound.dma);
293 err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
294 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
295 if (0 != err)
296 return err;
297 return 0;
298}
299
300/*
301 * DMA buffer release
302 *
303 * Called after closing the device, during snd_card_saa7134_capture_close
304 *
305 */
306
307static int dsp_buffer_free(struct saa7134_dev *dev)
308{
309 BUG_ON(!dev->dmasound.blksize);
310
311 videobuf_dma_free(&dev->dmasound.dma);
312
313 dev->dmasound.blocks = 0;
314 dev->dmasound.blksize = 0;
315 dev->dmasound.bufsize = 0;
316
317 return 0;
318}
319
320/*
321 * Setting the capture source and updating the ALSA controls
322 */
323static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
324 int left, int right, bool force_notify)
325{
326 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
327 int change = 0, addr = kcontrol->private_value;
328 int active, old_addr;
329 u32 anabar, xbarin;
330 int analog_io, rate;
331 struct saa7134_dev *dev;
332
333 dev = chip->dev;
334
335 spin_lock_irq(&chip->mixer_lock);
336
337 active = left != 0 || right != 0;
338 old_addr = chip->capture_source_addr;
339
340 /* The active capture source cannot be deactivated */
341 if (active) {
342 change = old_addr != addr ||
343 chip->capture_source[0] != left ||
344 chip->capture_source[1] != right;
345
346 chip->capture_source[0] = left;
347 chip->capture_source[1] = right;
348 chip->capture_source_addr = addr;
349 dev->dmasound.input = addr;
350 }
351 spin_unlock_irq(&chip->mixer_lock);
352
353 if (change) {
354 switch (dev->pci->device) {
355
356 case PCI_DEVICE_ID_PHILIPS_SAA7134:
357 switch (addr) {
358 case MIXER_ADDR_TVTUNER:
359 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
360 0xc0, 0xc0);
361 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
362 0x03, 0x00);
363 break;
364 case MIXER_ADDR_LINE1:
365 case MIXER_ADDR_LINE2:
366 analog_io = (MIXER_ADDR_LINE1 == addr) ?
367 0x00 : 0x08;
368 rate = (32000 == dev->dmasound.rate) ?
369 0x01 : 0x03;
370 saa_andorb(SAA7134_ANALOG_IO_SELECT,
371 0x08, analog_io);
372 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
373 0xc0, 0x80);
374 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
375 0x03, rate);
376 break;
377 }
378
379 break;
380 case PCI_DEVICE_ID_PHILIPS_SAA7133:
381 case PCI_DEVICE_ID_PHILIPS_SAA7135:
382 xbarin = 0x03; /* adc */
383 anabar = 0;
384 switch (addr) {
385 case MIXER_ADDR_TVTUNER:
386 xbarin = 0; /* Demodulator */
387 anabar = 2; /* DACs */
388 break;
389 case MIXER_ADDR_LINE1:
390 anabar = 0; /* aux1, aux1 */
391 break;
392 case MIXER_ADDR_LINE2:
393 anabar = 9; /* aux2, aux2 */
394 break;
395 }
396
397 /* output xbar always main channel */
398 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
399 0xbbbb10);
400
401 if (left || right) {
402 /* We've got data, turn the input on */
403 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
404 xbarin);
405 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
406 } else {
407 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
408 0);
409 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
410 }
411 break;
412 }
413 }
414
415 if (change) {
416 if (force_notify)
417 snd_ctl_notify(chip->card,
418 SNDRV_CTL_EVENT_MASK_VALUE,
419 &chip->capture_ctl[addr]->id);
420
421 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
422 snd_ctl_notify(chip->card,
423 SNDRV_CTL_EVENT_MASK_VALUE,
424 &chip->capture_ctl[old_addr]->id);
425 }
426
427 return change;
428}
429
430/*
431 * ALSA PCM preparation
432 *
433 * - One of the ALSA capture callbacks.
434 *
435 * Called right after the capture device is opened, this function configures
436 * the buffer using the previously defined functions, allocates the memory,
437 * sets up the hardware registers, and then starts the DMA. When this function
438 * returns, the audio should be flowing.
439 *
440 */
441
442static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
443{
444 struct snd_pcm_runtime *runtime = substream->runtime;
445 int bswap, sign;
446 u32 fmt, control;
447 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
448 struct saa7134_dev *dev;
449 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
450
451 pcm->dev->dmasound.substream = substream;
452
453 dev = saa7134->dev;
454
455 if (snd_pcm_format_width(runtime->format) == 8)
456 fmt = 0x00;
457 else
458 fmt = 0x01;
459
460 if (snd_pcm_format_signed(runtime->format))
461 sign = 1;
462 else
463 sign = 0;
464
465 if (snd_pcm_format_big_endian(runtime->format))
466 bswap = 1;
467 else
468 bswap = 0;
469
470 switch (dev->pci->device) {
471 case PCI_DEVICE_ID_PHILIPS_SAA7134:
472 if (1 == runtime->channels)
473 fmt |= (1 << 3);
474 if (2 == runtime->channels)
475 fmt |= (3 << 3);
476 if (sign)
477 fmt |= 0x04;
478
479 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
480 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
481 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8);
482 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
483 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
484
485 break;
486 case PCI_DEVICE_ID_PHILIPS_SAA7133:
487 case PCI_DEVICE_ID_PHILIPS_SAA7135:
488 if (1 == runtime->channels)
489 fmt |= (1 << 4);
490 if (2 == runtime->channels)
491 fmt |= (2 << 4);
492 if (!sign)
493 fmt |= 0x04;
494 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
495 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
496 break;
497 }
498
499 dprintk("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
500 runtime->format, runtime->channels, fmt,
501 bswap ? 'b' : '-');
502 /* dma: setup channel 6 (= AUDIO) */
503 control = SAA7134_RS_CONTROL_BURST_16 |
504 SAA7134_RS_CONTROL_ME |
505 (dev->dmasound.pt.dma >> 12);
506 if (bswap)
507 control |= SAA7134_RS_CONTROL_BSWAP;
508
509 saa_writel(SAA7134_RS_BA1(6),0);
510 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
511 saa_writel(SAA7134_RS_PITCH(6),0);
512 saa_writel(SAA7134_RS_CONTROL(6),control);
513
514 dev->dmasound.rate = runtime->rate;
515
516 /* Setup and update the card/ALSA controls */
517 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
518 true);
519
520 return 0;
521
522}
523
524/*
525 * ALSA pointer fetching
526 *
527 * - One of the ALSA capture callbacks.
528 *
529 * Called whenever a period elapses, it must return the current hardware
530 * position of the buffer.
531 * Also resets the read counter used to prevent overruns
532 *
533 */
534
535static snd_pcm_uframes_t
536snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
537{
538 struct snd_pcm_runtime *runtime = substream->runtime;
539 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
540 struct saa7134_dev *dev=pcm->dev;
541
542 if (dev->dmasound.read_count) {
543 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
544 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
545 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
546 dev->dmasound.read_offset = 0;
547 }
548
549 return bytes_to_frames(runtime, dev->dmasound.read_offset);
550}
551
552/*
553 * ALSA hardware capabilities definition
554 *
555 * Report only 32kHz for ALSA:
556 *
557 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
558 * only
559 * - SAA7134 for TV mode uses DemDec mode (32kHz)
560 * - Radio works in 32kHz only
561 * - When recording 48kHz from Line1/Line2, switching of capture source to TV
562 * means
563 * switching to 32kHz without any frequency translation
564 */
565
566static struct snd_pcm_hardware snd_card_saa7134_capture =
567{
568 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
569 SNDRV_PCM_INFO_BLOCK_TRANSFER |
570 SNDRV_PCM_INFO_MMAP_VALID),
571 .formats = SNDRV_PCM_FMTBIT_S16_LE | \
572 SNDRV_PCM_FMTBIT_S16_BE | \
573 SNDRV_PCM_FMTBIT_S8 | \
574 SNDRV_PCM_FMTBIT_U8 | \
575 SNDRV_PCM_FMTBIT_U16_LE | \
576 SNDRV_PCM_FMTBIT_U16_BE,
577 .rates = SNDRV_PCM_RATE_32000,
578 .rate_min = 32000,
579 .rate_max = 32000,
580 .channels_min = 1,
581 .channels_max = 2,
582 .buffer_bytes_max = (256*1024),
583 .period_bytes_min = 64,
584 .period_bytes_max = (256*1024),
585 .periods_min = 4,
586 .periods_max = 1024,
587};
588
589static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
590{
591 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
592
593 kfree(pcm);
594}
595
596
597/*
598 * ALSA hardware params
599 *
600 * - One of the ALSA capture callbacks.
601 *
602 * Called on initialization, right before the PCM preparation
603 *
604 */
605
606static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
607 struct snd_pcm_hw_params * hw_params)
608{
609 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
610 struct saa7134_dev *dev;
611 unsigned int period_size, periods;
612 int err;
613
614 period_size = params_period_bytes(hw_params);
615 periods = params_periods(hw_params);
616
617 if (period_size < 0x100 || period_size > 0x10000)
618 return -EINVAL;
619 if (periods < 4)
620 return -EINVAL;
621 if (period_size * periods > 1024 * 1024)
622 return -EINVAL;
623
624 dev = saa7134->dev;
625
626 if (dev->dmasound.blocks == periods &&
627 dev->dmasound.blksize == period_size)
628 return 0;
629
630 /* release the old buffer */
631 if (substream->runtime->dma_area) {
632 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
633 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
634 dsp_buffer_free(dev);
635 substream->runtime->dma_area = NULL;
636 }
637 dev->dmasound.blocks = periods;
638 dev->dmasound.blksize = period_size;
639 dev->dmasound.bufsize = period_size * periods;
640
641 err = dsp_buffer_init(dev);
642 if (0 != err) {
643 dev->dmasound.blocks = 0;
644 dev->dmasound.blksize = 0;
645 dev->dmasound.bufsize = 0;
646 return err;
647 }
648
649 if (0 != (err = videobuf_dma_map(&dev->pci->dev, &dev->dmasound.dma))) {
650 dsp_buffer_free(dev);
651 return err;
652 }
653 if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
654 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
655 dsp_buffer_free(dev);
656 return err;
657 }
658 if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
659 dev->dmasound.dma.sglist,
660 dev->dmasound.dma.sglen,
661 0))) {
662 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
663 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
664 dsp_buffer_free(dev);
665 return err;
666 }
667
668 /* I should be able to use runtime->dma_addr in the control
669 byte, but it doesn't work. So I allocate the DMA using the
670 V4L functions, and force ALSA to use that as the DMA area */
671
672 substream->runtime->dma_area = dev->dmasound.dma.vaddr;
673 substream->runtime->dma_bytes = dev->dmasound.bufsize;
674 substream->runtime->dma_addr = 0;
675
676 return 0;
677
678}
679
680/*
681 * ALSA hardware release
682 *
683 * - One of the ALSA capture callbacks.
684 *
685 * Called after closing the device, but before snd_card_saa7134_capture_close
686 * It stops the DMA audio and releases the buffers.
687 *
688 */
689
690static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
691{
692 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
693 struct saa7134_dev *dev;
694
695 dev = saa7134->dev;
696
697 if (substream->runtime->dma_area) {
698 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
699 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
700 dsp_buffer_free(dev);
701 substream->runtime->dma_area = NULL;
702 }
703
704 return 0;
705}
706
707/*
708 * ALSA capture finish
709 *
710 * - One of the ALSA capture callbacks.
711 *
712 * Called after closing the device.
713 *
714 */
715
716static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
717{
718 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
719 struct saa7134_dev *dev = saa7134->dev;
720
721 if (saa7134->mute_was_on) {
722 dev->ctl_mute = 1;
723 saa7134_tvaudio_setmute(dev);
724 }
725 return 0;
726}
727
728/*
729 * ALSA capture start
730 *
731 * - One of the ALSA capture callbacks.
732 *
733 * Called when opening the device. It creates and populates the PCM
734 * structure
735 *
736 */
737
738static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
739{
740 struct snd_pcm_runtime *runtime = substream->runtime;
741 snd_card_saa7134_pcm_t *pcm;
742 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
743 struct saa7134_dev *dev;
744 int amux, err;
745
746 if (!saa7134) {
747 printk(KERN_ERR "BUG: saa7134 can't find device struct."
748 " Can't proceed with open\n");
749 return -ENODEV;
750 }
751 dev = saa7134->dev;
752 mutex_lock(&dev->dmasound.lock);
753
754 dev->dmasound.read_count = 0;
755 dev->dmasound.read_offset = 0;
756
757 amux = dev->input->amux;
758 if ((amux < 1) || (amux > 3))
759 amux = 1;
760 dev->dmasound.input = amux - 1;
761
762 mutex_unlock(&dev->dmasound.lock);
763
764 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
765 if (pcm == NULL)
766 return -ENOMEM;
767
768 pcm->dev=saa7134->dev;
769
770 spin_lock_init(&pcm->lock);
771
772 pcm->substream = substream;
773 runtime->private_data = pcm;
774 runtime->private_free = snd_card_saa7134_runtime_free;
775 runtime->hw = snd_card_saa7134_capture;
776
777 if (dev->ctl_mute != 0) {
778 saa7134->mute_was_on = 1;
779 dev->ctl_mute = 0;
780 saa7134_tvaudio_setmute(dev);
781 }
782
783 err = snd_pcm_hw_constraint_integer(runtime,
784 SNDRV_PCM_HW_PARAM_PERIODS);
785 if (err < 0)
786 return err;
787
788 err = snd_pcm_hw_constraint_step(runtime, 0,
789 SNDRV_PCM_HW_PARAM_PERIODS, 2);
790 if (err < 0)
791 return err;
792
793 return 0;
794}
795
796/*
797 * page callback (needed for mmap)
798 */
799
800static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
801 unsigned long offset)
802{
803 void *pageptr = substream->runtime->dma_area + offset;
804 return vmalloc_to_page(pageptr);
805}
806
807/*
808 * ALSA capture callbacks definition
809 */
810
811static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
812 .open = snd_card_saa7134_capture_open,
813 .close = snd_card_saa7134_capture_close,
814 .ioctl = snd_pcm_lib_ioctl,
815 .hw_params = snd_card_saa7134_hw_params,
816 .hw_free = snd_card_saa7134_hw_free,
817 .prepare = snd_card_saa7134_capture_prepare,
818 .trigger = snd_card_saa7134_capture_trigger,
819 .pointer = snd_card_saa7134_capture_pointer,
820 .page = snd_card_saa7134_page,
821};
822
823/*
824 * ALSA PCM setup
825 *
826 * Called when initializing the board. Sets up the name and hooks up
827 * the callbacks
828 *
829 */
830
831static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
832{
833 struct snd_pcm *pcm;
834 int err;
835
836 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
837 return err;
838 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
839 pcm->private_data = saa7134;
840 pcm->info_flags = 0;
841 strcpy(pcm->name, "SAA7134 PCM");
842 return 0;
843}
844
845#define SAA713x_VOLUME(xname, xindex, addr) \
846{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
847 .info = snd_saa7134_volume_info, \
848 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
849 .private_value = addr }
850
851static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
852 struct snd_ctl_elem_info * uinfo)
853{
854 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
855 uinfo->count = 2;
856 uinfo->value.integer.min = 0;
857 uinfo->value.integer.max = 20;
858 return 0;
859}
860
861static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
862 struct snd_ctl_elem_value * ucontrol)
863{
864 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
865 int addr = kcontrol->private_value;
866
867 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
868 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
869 return 0;
870}
871
872static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
873 struct snd_ctl_elem_value * ucontrol)
874{
875 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
876 struct saa7134_dev *dev = chip->dev;
877
878 int change, addr = kcontrol->private_value;
879 int left, right;
880
881 left = ucontrol->value.integer.value[0];
882 if (left < 0)
883 left = 0;
884 if (left > 20)
885 left = 20;
886 right = ucontrol->value.integer.value[1];
887 if (right < 0)
888 right = 0;
889 if (right > 20)
890 right = 20;
891 spin_lock_irq(&chip->mixer_lock);
892 change = 0;
893 if (chip->mixer_volume[addr][0] != left) {
894 change = 1;
895 right = left;
896 }
897 if (chip->mixer_volume[addr][1] != right) {
898 change = 1;
899 left = right;
900 }
901 if (change) {
902 switch (dev->pci->device) {
903 case PCI_DEVICE_ID_PHILIPS_SAA7134:
904 switch (addr) {
905 case MIXER_ADDR_TVTUNER:
906 left = 20;
907 break;
908 case MIXER_ADDR_LINE1:
909 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
910 (left > 10) ? 0x00 : 0x10);
911 break;
912 case MIXER_ADDR_LINE2:
913 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
914 (left > 10) ? 0x00 : 0x20);
915 break;
916 }
917 break;
918 case PCI_DEVICE_ID_PHILIPS_SAA7133:
919 case PCI_DEVICE_ID_PHILIPS_SAA7135:
920 switch (addr) {
921 case MIXER_ADDR_TVTUNER:
922 left = 20;
923 break;
924 case MIXER_ADDR_LINE1:
925 saa_andorb(0x0594, 0x10,
926 (left > 10) ? 0x00 : 0x10);
927 break;
928 case MIXER_ADDR_LINE2:
929 saa_andorb(0x0594, 0x20,
930 (left > 10) ? 0x00 : 0x20);
931 break;
932 }
933 break;
934 }
935 chip->mixer_volume[addr][0] = left;
936 chip->mixer_volume[addr][1] = right;
937 }
938 spin_unlock_irq(&chip->mixer_lock);
939 return change;
940}
941
942#define SAA713x_CAPSRC(xname, xindex, addr) \
943{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
944 .info = snd_saa7134_capsrc_info, \
945 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
946 .private_value = addr }
947
948static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
949 struct snd_ctl_elem_info * uinfo)
950{
951 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
952 uinfo->count = 2;
953 uinfo->value.integer.min = 0;
954 uinfo->value.integer.max = 1;
955 return 0;
956}
957
958static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
959 struct snd_ctl_elem_value * ucontrol)
960{
961 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
962 int addr = kcontrol->private_value;
963
964 spin_lock_irq(&chip->mixer_lock);
965 if (chip->capture_source_addr == addr) {
966 ucontrol->value.integer.value[0] = chip->capture_source[0];
967 ucontrol->value.integer.value[1] = chip->capture_source[1];
968 } else {
969 ucontrol->value.integer.value[0] = 0;
970 ucontrol->value.integer.value[1] = 0;
971 }
972 spin_unlock_irq(&chip->mixer_lock);
973
974 return 0;
975}
976
977static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
978 struct snd_ctl_elem_value * ucontrol)
979{
980 int left, right;
981 left = ucontrol->value.integer.value[0] & 1;
982 right = ucontrol->value.integer.value[1] & 1;
983
984 return snd_saa7134_capsrc_set(kcontrol, left, right, false);
985}
986
987static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
988SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
989SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
990SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
991};
992
993static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
994SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
995SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
996SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
997};
998
999/*
1000 * ALSA mixer setup
1001 *
1002 * Called when initializing the board. Sets up the name and hooks up
1003 * the callbacks
1004 *
1005 */
1006
1007static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1008{
1009 struct snd_card *card = chip->card;
1010 struct snd_kcontrol *kcontrol;
1011 unsigned int idx;
1012 int err, addr;
1013
1014 strcpy(card->mixername, "SAA7134 Mixer");
1015
1016 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1017 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1018 chip);
1019 err = snd_ctl_add(card, kcontrol);
1020 if (err < 0)
1021 return err;
1022 }
1023
1024 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1025 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1026 chip);
1027 addr = snd_saa7134_capture_controls[idx].private_value;
1028 chip->capture_ctl[addr] = kcontrol;
1029 err = snd_ctl_add(card, kcontrol);
1030 if (err < 0)
1031 return err;
1032 }
1033
1034 chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1035 return 0;
1036}
1037
1038static void snd_saa7134_free(struct snd_card * card)
1039{
1040 snd_card_saa7134_t *chip = card->private_data;
1041
1042 if (chip->dev->dmasound.priv_data == NULL)
1043 return;
1044
1045 if (chip->irq >= 0)
1046 free_irq(chip->irq, &chip->dev->dmasound);
1047
1048 chip->dev->dmasound.priv_data = NULL;
1049
1050}
1051
1052/*
1053 * ALSA initialization
1054 *
1055 * Called by the init routine, once for each saa7134 device present,
1056 * it creates the basic structures and registers the ALSA devices
1057 *
1058 */
1059
1060static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1061{
1062
1063 struct snd_card *card;
1064 snd_card_saa7134_t *chip;
1065 int err;
1066
1067
1068 if (devnum >= SNDRV_CARDS)
1069 return -ENODEV;
1070 if (!enable[devnum])
1071 return -ENODEV;
1072
1073 err = snd_card_create(index[devnum], id[devnum], THIS_MODULE,
1074 sizeof(snd_card_saa7134_t), &card);
1075 if (err < 0)
1076 return err;
1077
1078 strcpy(card->driver, "SAA7134");
1079
1080 /* Card "creation" */
1081
1082 card->private_free = snd_saa7134_free;
1083 chip = card->private_data;
1084
1085 spin_lock_init(&chip->lock);
1086 spin_lock_init(&chip->mixer_lock);
1087
1088 chip->dev = dev;
1089
1090 chip->card = card;
1091
1092 chip->pci = dev->pci;
1093 chip->iobase = pci_resource_start(dev->pci, 0);
1094
1095
1096 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1097 IRQF_SHARED | IRQF_DISABLED, dev->name,
1098 (void*) &dev->dmasound);
1099
1100 if (err < 0) {
1101 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1102 dev->name, dev->pci->irq);
1103 goto __nodev;
1104 }
1105
1106 chip->irq = dev->pci->irq;
1107
1108 mutex_init(&dev->dmasound.lock);
1109
1110 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1111 goto __nodev;
1112
1113 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1114 goto __nodev;
1115
1116 snd_card_set_dev(card, &chip->pci->dev);
1117
1118 /* End of "creation" */
1119
1120 strcpy(card->shortname, "SAA7134");
1121 sprintf(card->longname, "%s at 0x%lx irq %d",
1122 chip->dev->name, chip->iobase, chip->irq);
1123
1124 printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1125
1126 if ((err = snd_card_register(card)) == 0) {
1127 snd_saa7134_cards[devnum] = card;
1128 return 0;
1129 }
1130
1131__nodev:
1132 snd_card_free(card);
1133 return err;
1134}
1135
1136
1137static int alsa_device_init(struct saa7134_dev *dev)
1138{
1139 dev->dmasound.priv_data = dev;
1140 alsa_card_saa7134_create(dev,dev->nr);
1141 return 1;
1142}
1143
1144static int alsa_device_exit(struct saa7134_dev *dev)
1145{
1146
1147 snd_card_free(snd_saa7134_cards[dev->nr]);
1148 snd_saa7134_cards[dev->nr] = NULL;
1149 return 1;
1150}
1151
1152/*
1153 * Module initializer
1154 *
1155 * Loops through present saa7134 cards, and assigns an ALSA device
1156 * to each one
1157 *
1158 */
1159
1160static int saa7134_alsa_init(void)
1161{
1162 struct saa7134_dev *dev = NULL;
1163 struct list_head *list;
1164
1165 saa7134_dmasound_init = alsa_device_init;
1166 saa7134_dmasound_exit = alsa_device_exit;
1167
1168 printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1169
1170 list_for_each(list,&saa7134_devlist) {
1171 dev = list_entry(list, struct saa7134_dev, devlist);
1172 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1173 printk(KERN_INFO "%s/alsa: %s doesn't support digital audio\n",
1174 dev->name, saa7134_boards[dev->board].name);
1175 else
1176 alsa_device_init(dev);
1177 }
1178
1179 if (dev == NULL)
1180 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1181
1182 return 0;
1183
1184}
1185
1186/*
1187 * Module destructor
1188 */
1189
1190static void saa7134_alsa_exit(void)
1191{
1192 int idx;
1193
1194 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1195 snd_card_free(snd_saa7134_cards[idx]);
1196 }
1197
1198 saa7134_dmasound_init = NULL;
1199 saa7134_dmasound_exit = NULL;
1200 printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1201
1202 return;
1203}
1204
1205/* We initialize this late, to make sure the sound system is up and running */
1206late_initcall(saa7134_alsa_init);
1207module_exit(saa7134_alsa_exit);
1208MODULE_LICENSE("GPL");
1209MODULE_AUTHOR("Ricardo Cerqueira");
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-21 14:26:53 -0400