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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / media / pci / saa7134 / saa7134-alsa.c
blobc59b69f1af9d935e1c392ad74d8f3e730cdb2fe6
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 */
14
15 #include "saa7134.h"
16 #include "saa7134-reg.h"
17
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/time.h>
21 #include <linux/wait.h>
22 #include <linux/module.h>
23 #include <sound/core.h>
24 #include <sound/control.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/initval.h>
28 #include <linux/interrupt.h>
29 #include <linux/vmalloc.h>
30
31 /*
32 * Configuration macros
33 */
34
35 /* defaults */
36 #define MIXER_ADDR_UNSELECTED -1
37 #define MIXER_ADDR_TVTUNER 0
38 #define MIXER_ADDR_LINE1 1
39 #define MIXER_ADDR_LINE2 2
40 #define MIXER_ADDR_LAST 2
41
42
43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
45 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
46
47 module_param_array(index, int, NULL, 0444);
48 module_param_array(enable, int, NULL, 0444);
49 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
50 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
51
52 /*
53 * Main chip structure
54 */
55
56 typedef struct snd_card_saa7134 {
57 struct snd_card *card;
58 spinlock_t mixer_lock;
59 int mixer_volume[MIXER_ADDR_LAST+1][2];
60 int capture_source_addr;
61 int capture_source[2];
62 struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
63 struct pci_dev *pci;
64 struct saa7134_dev *dev;
65
66 unsigned long iobase;
67 s16 irq;
68 u16 mute_was_on;
69
70 spinlock_t lock;
71 } snd_card_saa7134_t;
72
73
74 /*
75 * PCM structure
76 */
77
78 typedef struct snd_card_saa7134_pcm {
79 struct saa7134_dev *dev;
80
81 spinlock_t lock;
82
83 struct snd_pcm_substream *substream;
84 } snd_card_saa7134_pcm_t;
85
86 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
87
88
89 /*
90 * saa7134 DMA audio stop
91 *
92 * Called when the capture device is released or the buffer overflows
93 *
94 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
95 *
96 */
97
98 static void saa7134_dma_stop(struct saa7134_dev *dev)
99 {
100 dev->dmasound.dma_blk = -1;
101 dev->dmasound.dma_running = 0;
102 saa7134_set_dmabits(dev);
103 }
104
105 /*
106 * saa7134 DMA audio start
107 *
108 * Called when preparing the capture device for use
109 *
110 * - Copied verbatim from saa7134-oss's dsp_dma_start.
111 *
112 */
113
114 static void saa7134_dma_start(struct saa7134_dev *dev)
115 {
116 dev->dmasound.dma_blk = 0;
117 dev->dmasound.dma_running = 1;
118 saa7134_set_dmabits(dev);
119 }
120
121 /*
122 * saa7134 audio DMA IRQ handler
123 *
124 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
125 * Handles shifting between the 2 buffers, manages the read counters,
126 * and notifies ALSA when periods elapse
127 *
128 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
129 *
130 */
131
132 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
133 unsigned long status)
134 {
135 int next_blk, reg = 0;
136
137 spin_lock(&dev->slock);
138 if (UNSET == dev->dmasound.dma_blk) {
139 pr_debug("irq: recording stopped\n");
140 goto done;
141 }
142 if (0 != (status & 0x0f000000))
143 pr_debug("irq: lost %ld\n", (status >> 24) & 0x0f);
144 if (0 == (status & 0x10000000)) {
145 /* odd */
146 if (0 == (dev->dmasound.dma_blk & 0x01))
147 reg = SAA7134_RS_BA1(6);
148 } else {
149 /* even */
150 if (1 == (dev->dmasound.dma_blk & 0x01))
151 reg = SAA7134_RS_BA2(6);
152 }
153 if (0 == reg) {
154 pr_debug("irq: field oops [%s]\n",
155 (status & 0x10000000) ? "even" : "odd");
156 goto done;
157 }
158
159 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
160 pr_debug("irq: overrun [full=%d/%d] - Blocks in %d\n",
161 dev->dmasound.read_count,
162 dev->dmasound.bufsize, dev->dmasound.blocks);
163 spin_unlock(&dev->slock);
164 snd_pcm_stop_xrun(dev->dmasound.substream);
165 return;
166 }
167
168 /* next block addr */
169 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
170 saa_writel(reg,next_blk * dev->dmasound.blksize);
171 pr_debug("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
172 (status & 0x10000000) ? "even" : "odd ", next_blk,
173 next_blk * dev->dmasound.blksize, dev->dmasound.blocks,
174 dev->dmasound.blksize, dev->dmasound.read_count);
175
176 /* update status & wake waiting readers */
177 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
178 dev->dmasound.read_count += dev->dmasound.blksize;
179
180 dev->dmasound.recording_on = reg;
181
182 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
183 spin_unlock(&dev->slock);
184 snd_pcm_period_elapsed(dev->dmasound.substream);
185 spin_lock(&dev->slock);
186 }
187
188 done:
189 spin_unlock(&dev->slock);
190
191 }
192
193 /*
194 * IRQ request handler
195 *
196 * Runs along with saa7134's IRQ handler, discards anything that isn't
197 * DMA sound
198 *
199 */
200
201 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
202 {
203 struct saa7134_dmasound *dmasound = dev_id;
204 struct saa7134_dev *dev = dmasound->priv_data;
205
206 unsigned long report, status;
207 int loop, handled = 0;
208
209 for (loop = 0; loop < 10; loop++) {
210 report = saa_readl(SAA7134_IRQ_REPORT);
211 status = saa_readl(SAA7134_IRQ_STATUS);
212
213 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
214 handled = 1;
215 saa_writel(SAA7134_IRQ_REPORT,
216 SAA7134_IRQ_REPORT_DONE_RA3);
217 saa7134_irq_alsa_done(dev, status);
218 } else {
219 goto out;
220 }
221 }
222
223 if (loop == 10) {
224 pr_debug("error! looping IRQ!");
225 }
226
227 out:
228 return IRQ_RETVAL(handled);
229 }
230
231 /*
232 * ALSA capture trigger
233 *
234 * - One of the ALSA capture callbacks.
235 *
236 * Called whenever a capture is started or stopped. Must be defined,
237 * but there's nothing we want to do here
238 *
239 */
240
241 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
242 int cmd)
243 {
244 struct snd_pcm_runtime *runtime = substream->runtime;
245 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
246 struct saa7134_dev *dev=pcm->dev;
247 int err = 0;
248
249 spin_lock(&dev->slock);
250 if (cmd == SNDRV_PCM_TRIGGER_START) {
251 /* start dma */
252 saa7134_dma_start(dev);
253 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
254 /* stop dma */
255 saa7134_dma_stop(dev);
256 } else {
257 err = -EINVAL;
258 }
259 spin_unlock(&dev->slock);
260
261 return err;
262 }
263
264 static int saa7134_alsa_dma_init(struct saa7134_dev *dev, int nr_pages)
265 {
266 struct saa7134_dmasound *dma = &dev->dmasound;
267 struct page *pg;
268 int i;
269
270 dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
271 if (NULL == dma->vaddr) {
272 pr_debug("vmalloc_32(%d pages) failed\n", nr_pages);
273 return -ENOMEM;
274 }
275
276 pr_debug("vmalloc is at addr 0x%08lx, size=%d\n",
277 (unsigned long)dma->vaddr,
278 nr_pages << PAGE_SHIFT);
279
280 memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
281 dma->nr_pages = nr_pages;
282
283 dma->sglist = vzalloc(dma->nr_pages * sizeof(*dma->sglist));
284 if (NULL == dma->sglist)
285 goto vzalloc_err;
286
287 sg_init_table(dma->sglist, dma->nr_pages);
288 for (i = 0; i < dma->nr_pages; i++) {
289 pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE);
290 if (NULL == pg)
291 goto vmalloc_to_page_err;
292 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
293 }
294 return 0;
295
296 vmalloc_to_page_err:
297 vfree(dma->sglist);
298 dma->sglist = NULL;
299 vzalloc_err:
300 vfree(dma->vaddr);
301 dma->vaddr = NULL;
302 return -ENOMEM;
303 }
304
305 static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
306 {
307 struct saa7134_dmasound *dma = &dev->dmasound;
308
309 dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
310 dma->nr_pages, PCI_DMA_FROMDEVICE);
311
312 if (0 == dma->sglen) {
313 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
314 return -ENOMEM;
315 }
316 return 0;
317 }
318
319 static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
320 {
321 struct saa7134_dmasound *dma = &dev->dmasound;
322
323 if (!dma->sglen)
324 return 0;
325
326 dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE);
327 dma->sglen = 0;
328 return 0;
329 }
330
331 static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
332 {
333 vfree(dma->sglist);
334 dma->sglist = NULL;
335 vfree(dma->vaddr);
336 dma->vaddr = NULL;
337 return 0;
338 }
339
340 /*
341 * DMA buffer initialization
342 *
343 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in
344 * ALSA, but I was unable to use ALSA's own DMA, and had to force the
345 * usage of V4L's
346 *
347 * - Copied verbatim from saa7134-oss.
348 *
349 */
350
351 static int dsp_buffer_init(struct saa7134_dev *dev)
352 {
353 int err;
354
355 BUG_ON(!dev->dmasound.bufsize);
356
357 err = saa7134_alsa_dma_init(dev,
358 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
359 if (0 != err)
360 return err;
361 return 0;
362 }
363
364 /*
365 * DMA buffer release
366 *
367 * Called after closing the device, during snd_card_saa7134_capture_close
368 *
369 */
370
371 static int dsp_buffer_free(struct saa7134_dev *dev)
372 {
373 BUG_ON(!dev->dmasound.blksize);
374
375 saa7134_alsa_dma_free(&dev->dmasound);
376
377 dev->dmasound.blocks = 0;
378 dev->dmasound.blksize = 0;
379 dev->dmasound.bufsize = 0;
380
381 return 0;
382 }
383
384 /*
385 * Setting the capture source and updating the ALSA controls
386 */
387 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
388 int left, int right, bool force_notify)
389 {
390 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
391 int change = 0, addr = kcontrol->private_value;
392 int active, old_addr;
393 u32 anabar, xbarin;
394 int analog_io, rate;
395 struct saa7134_dev *dev;
396
397 dev = chip->dev;
398
399 spin_lock_irq(&chip->mixer_lock);
400
401 active = left != 0 || right != 0;
402 old_addr = chip->capture_source_addr;
403
404 /* The active capture source cannot be deactivated */
405 if (active) {
406 change = old_addr != addr ||
407 chip->capture_source[0] != left ||
408 chip->capture_source[1] != right;
409
410 chip->capture_source[0] = left;
411 chip->capture_source[1] = right;
412 chip->capture_source_addr = addr;
413 dev->dmasound.input = addr;
414 }
415 spin_unlock_irq(&chip->mixer_lock);
416
417 if (change) {
418 switch (dev->pci->device) {
419
420 case PCI_DEVICE_ID_PHILIPS_SAA7134:
421 switch (addr) {
422 case MIXER_ADDR_TVTUNER:
423 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
424 0xc0, 0xc0);
425 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
426 0x03, 0x00);
427 break;
428 case MIXER_ADDR_LINE1:
429 case MIXER_ADDR_LINE2:
430 analog_io = (MIXER_ADDR_LINE1 == addr) ?
431 0x00 : 0x08;
432 rate = (32000 == dev->dmasound.rate) ?
433 0x01 : 0x03;
434 saa_andorb(SAA7134_ANALOG_IO_SELECT,
435 0x08, analog_io);
436 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
437 0xc0, 0x80);
438 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
439 0x03, rate);
440 break;
441 }
442
443 break;
444 case PCI_DEVICE_ID_PHILIPS_SAA7133:
445 case PCI_DEVICE_ID_PHILIPS_SAA7135:
446 xbarin = 0x03; /* adc */
447 anabar = 0;
448 switch (addr) {
449 case MIXER_ADDR_TVTUNER:
450 xbarin = 0; /* Demodulator */
451 anabar = 2; /* DACs */
452 break;
453 case MIXER_ADDR_LINE1:
454 anabar = 0; /* aux1, aux1 */
455 break;
456 case MIXER_ADDR_LINE2:
457 anabar = 9; /* aux2, aux2 */
458 break;
459 }
460
461 /* output xbar always main channel */
462 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
463 0xbbbb10);
464
465 if (left || right) {
466 /* We've got data, turn the input on */
467 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
468 xbarin);
469 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
470 } else {
471 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
472 0);
473 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
474 }
475 break;
476 }
477 }
478
479 if (change) {
480 if (force_notify)
481 snd_ctl_notify(chip->card,
482 SNDRV_CTL_EVENT_MASK_VALUE,
483 &chip->capture_ctl[addr]->id);
484
485 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
486 snd_ctl_notify(chip->card,
487 SNDRV_CTL_EVENT_MASK_VALUE,
488 &chip->capture_ctl[old_addr]->id);
489 }
490
491 return change;
492 }
493
494 /*
495 * ALSA PCM preparation
496 *
497 * - One of the ALSA capture callbacks.
498 *
499 * Called right after the capture device is opened, this function configures
500 * the buffer using the previously defined functions, allocates the memory,
501 * sets up the hardware registers, and then starts the DMA. When this function
502 * returns, the audio should be flowing.
503 *
504 */
505
506 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
507 {
508 struct snd_pcm_runtime *runtime = substream->runtime;
509 int bswap, sign;
510 u32 fmt, control;
511 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
512 struct saa7134_dev *dev;
513 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
514
515 pcm->dev->dmasound.substream = substream;
516
517 dev = saa7134->dev;
518
519 if (snd_pcm_format_width(runtime->format) == 8)
520 fmt = 0x00;
521 else
522 fmt = 0x01;
523
524 if (snd_pcm_format_signed(runtime->format))
525 sign = 1;
526 else
527 sign = 0;
528
529 if (snd_pcm_format_big_endian(runtime->format))
530 bswap = 1;
531 else
532 bswap = 0;
533
534 switch (dev->pci->device) {
535 case PCI_DEVICE_ID_PHILIPS_SAA7134:
536 if (1 == runtime->channels)
537 fmt |= (1 << 3);
538 if (2 == runtime->channels)
539 fmt |= (3 << 3);
540 if (sign)
541 fmt |= 0x04;
542
543 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
544 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
545 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8);
546 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
547 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
548
549 break;
550 case PCI_DEVICE_ID_PHILIPS_SAA7133:
551 case PCI_DEVICE_ID_PHILIPS_SAA7135:
552 if (1 == runtime->channels)
553 fmt |= (1 << 4);
554 if (2 == runtime->channels)
555 fmt |= (2 << 4);
556 if (!sign)
557 fmt |= 0x04;
558 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
559 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
560 break;
561 }
562
563 pr_debug("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
564 runtime->format, runtime->channels, fmt,
565 bswap ? 'b' : '-');
566 /* dma: setup channel 6 (= AUDIO) */
567 control = SAA7134_RS_CONTROL_BURST_16 |
568 SAA7134_RS_CONTROL_ME |
569 (dev->dmasound.pt.dma >> 12);
570 if (bswap)
571 control |= SAA7134_RS_CONTROL_BSWAP;
572
573 saa_writel(SAA7134_RS_BA1(6),0);
574 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
575 saa_writel(SAA7134_RS_PITCH(6),0);
576 saa_writel(SAA7134_RS_CONTROL(6),control);
577
578 dev->dmasound.rate = runtime->rate;
579
580 /* Setup and update the card/ALSA controls */
581 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
582 true);
583
584 return 0;
585
586 }
587
588 /*
589 * ALSA pointer fetching
590 *
591 * - One of the ALSA capture callbacks.
592 *
593 * Called whenever a period elapses, it must return the current hardware
594 * position of the buffer.
595 * Also resets the read counter used to prevent overruns
596 *
597 */
598
599 static snd_pcm_uframes_t
600 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
601 {
602 struct snd_pcm_runtime *runtime = substream->runtime;
603 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
604 struct saa7134_dev *dev=pcm->dev;
605
606 if (dev->dmasound.read_count) {
607 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
608 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
609 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
610 dev->dmasound.read_offset = 0;
611 }
612
613 return bytes_to_frames(runtime, dev->dmasound.read_offset);
614 }
615
616 /*
617 * ALSA hardware capabilities definition
618 *
619 * Report only 32kHz for ALSA:
620 *
621 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
622 * only
623 * - SAA7134 for TV mode uses DemDec mode (32kHz)
624 * - Radio works in 32kHz only
625 * - When recording 48kHz from Line1/Line2, switching of capture source to TV
626 * means
627 * switching to 32kHz without any frequency translation
628 */
629
630 static const struct snd_pcm_hardware snd_card_saa7134_capture =
631 {
632 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
633 SNDRV_PCM_INFO_BLOCK_TRANSFER |
634 SNDRV_PCM_INFO_MMAP_VALID),
635 .formats = SNDRV_PCM_FMTBIT_S16_LE | \
636 SNDRV_PCM_FMTBIT_S16_BE | \
637 SNDRV_PCM_FMTBIT_S8 | \
638 SNDRV_PCM_FMTBIT_U8 | \
639 SNDRV_PCM_FMTBIT_U16_LE | \
640 SNDRV_PCM_FMTBIT_U16_BE,
641 .rates = SNDRV_PCM_RATE_32000,
642 .rate_min = 32000,
643 .rate_max = 32000,
644 .channels_min = 1,
645 .channels_max = 2,
646 .buffer_bytes_max = (256*1024),
647 .period_bytes_min = 64,
648 .period_bytes_max = (256*1024),
649 .periods_min = 4,
650 .periods_max = 1024,
651 };
652
653 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
654 {
655 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
656
657 kfree(pcm);
658 }
659
660
661 /*
662 * ALSA hardware params
663 *
664 * - One of the ALSA capture callbacks.
665 *
666 * Called on initialization, right before the PCM preparation
667 *
668 */
669
670 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
671 struct snd_pcm_hw_params * hw_params)
672 {
673 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
674 struct saa7134_dev *dev;
675 unsigned int period_size, periods;
676 int err;
677
678 period_size = params_period_bytes(hw_params);
679 periods = params_periods(hw_params);
680
681 if (period_size < 0x100 || period_size > 0x10000)
682 return -EINVAL;
683 if (periods < 4)
684 return -EINVAL;
685 if (period_size * periods > 1024 * 1024)
686 return -EINVAL;
687
688 dev = saa7134->dev;
689
690 if (dev->dmasound.blocks == periods &&
691 dev->dmasound.blksize == period_size)
692 return 0;
693
694 /* release the old buffer */
695 if (substream->runtime->dma_area) {
696 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
697 saa7134_alsa_dma_unmap(dev);
698 dsp_buffer_free(dev);
699 substream->runtime->dma_area = NULL;
700 }
701 dev->dmasound.blocks = periods;
702 dev->dmasound.blksize = period_size;
703 dev->dmasound.bufsize = period_size * periods;
704
705 err = dsp_buffer_init(dev);
706 if (0 != err) {
707 dev->dmasound.blocks = 0;
708 dev->dmasound.blksize = 0;
709 dev->dmasound.bufsize = 0;
710 return err;
711 }
712
713 err = saa7134_alsa_dma_map(dev);
714 if (err) {
715 dsp_buffer_free(dev);
716 return err;
717 }
718 err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
719 if (err) {
720 saa7134_alsa_dma_unmap(dev);
721 dsp_buffer_free(dev);
722 return err;
723 }
724 err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
725 dev->dmasound.sglist, dev->dmasound.sglen, 0);
726 if (err) {
727 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
728 saa7134_alsa_dma_unmap(dev);
729 dsp_buffer_free(dev);
730 return err;
731 }
732
733 /* I should be able to use runtime->dma_addr in the control
734 byte, but it doesn't work. So I allocate the DMA using the
735 V4L functions, and force ALSA to use that as the DMA area */
736
737 substream->runtime->dma_area = dev->dmasound.vaddr;
738 substream->runtime->dma_bytes = dev->dmasound.bufsize;
739 substream->runtime->dma_addr = 0;
740
741 return 0;
742
743 }
744
745 /*
746 * ALSA hardware release
747 *
748 * - One of the ALSA capture callbacks.
749 *
750 * Called after closing the device, but before snd_card_saa7134_capture_close
751 * It stops the DMA audio and releases the buffers.
752 *
753 */
754
755 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
756 {
757 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
758 struct saa7134_dev *dev;
759
760 dev = saa7134->dev;
761
762 if (substream->runtime->dma_area) {
763 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
764 saa7134_alsa_dma_unmap(dev);
765 dsp_buffer_free(dev);
766 substream->runtime->dma_area = NULL;
767 }
768
769 return 0;
770 }
771
772 /*
773 * ALSA capture finish
774 *
775 * - One of the ALSA capture callbacks.
776 *
777 * Called after closing the device.
778 *
779 */
780
781 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
782 {
783 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
784 struct saa7134_dev *dev = saa7134->dev;
785
786 if (saa7134->mute_was_on) {
787 dev->ctl_mute = 1;
788 saa7134_tvaudio_setmute(dev);
789 }
790 return 0;
791 }
792
793 /*
794 * ALSA capture start
795 *
796 * - One of the ALSA capture callbacks.
797 *
798 * Called when opening the device. It creates and populates the PCM
799 * structure
800 *
801 */
802
803 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
804 {
805 struct snd_pcm_runtime *runtime = substream->runtime;
806 snd_card_saa7134_pcm_t *pcm;
807 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
808 struct saa7134_dev *dev;
809 int amux, err;
810
811 if (!saa7134) {
812 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n");
813 return -ENODEV;
814 }
815 dev = saa7134->dev;
816 mutex_lock(&dev->dmasound.lock);
817
818 dev->dmasound.read_count = 0;
819 dev->dmasound.read_offset = 0;
820
821 amux = dev->input->amux;
822 if ((amux < 1) || (amux > 3))
823 amux = 1;
824 dev->dmasound.input = amux - 1;
825
826 mutex_unlock(&dev->dmasound.lock);
827
828 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
829 if (pcm == NULL)
830 return -ENOMEM;
831
832 pcm->dev=saa7134->dev;
833
834 spin_lock_init(&pcm->lock);
835
836 pcm->substream = substream;
837 runtime->private_data = pcm;
838 runtime->private_free = snd_card_saa7134_runtime_free;
839 runtime->hw = snd_card_saa7134_capture;
840
841 if (dev->ctl_mute != 0) {
842 saa7134->mute_was_on = 1;
843 dev->ctl_mute = 0;
844 saa7134_tvaudio_setmute(dev);
845 }
846
847 err = snd_pcm_hw_constraint_integer(runtime,
848 SNDRV_PCM_HW_PARAM_PERIODS);
849 if (err < 0)
850 return err;
851
852 err = snd_pcm_hw_constraint_step(runtime, 0,
853 SNDRV_PCM_HW_PARAM_PERIODS, 2);
854 if (err < 0)
855 return err;
856
857 return 0;
858 }
859
860 /*
861 * page callback (needed for mmap)
862 */
863
864 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
865 unsigned long offset)
866 {
867 void *pageptr = substream->runtime->dma_area + offset;
868 return vmalloc_to_page(pageptr);
869 }
870
871 /*
872 * ALSA capture callbacks definition
873 */
874
875 static const struct snd_pcm_ops snd_card_saa7134_capture_ops = {
876 .open = snd_card_saa7134_capture_open,
877 .close = snd_card_saa7134_capture_close,
878 .ioctl = snd_pcm_lib_ioctl,
879 .hw_params = snd_card_saa7134_hw_params,
880 .hw_free = snd_card_saa7134_hw_free,
881 .prepare = snd_card_saa7134_capture_prepare,
882 .trigger = snd_card_saa7134_capture_trigger,
883 .pointer = snd_card_saa7134_capture_pointer,
884 .page = snd_card_saa7134_page,
885 };
886
887 /*
888 * ALSA PCM setup
889 *
890 * Called when initializing the board. Sets up the name and hooks up
891 * the callbacks
892 *
893 */
894
895 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
896 {
897 struct snd_pcm *pcm;
898 int err;
899
900 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
901 return err;
902 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
903 pcm->private_data = saa7134;
904 pcm->info_flags = 0;
905 strcpy(pcm->name, "SAA7134 PCM");
906 return 0;
907 }
908
909 #define SAA713x_VOLUME(xname, xindex, addr) \
910 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
911 .info = snd_saa7134_volume_info, \
912 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
913 .private_value = addr }
914
915 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
916 struct snd_ctl_elem_info * uinfo)
917 {
918 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
919 uinfo->count = 2;
920 uinfo->value.integer.min = 0;
921 uinfo->value.integer.max = 20;
922 return 0;
923 }
924
925 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
926 struct snd_ctl_elem_value * ucontrol)
927 {
928 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
929 int addr = kcontrol->private_value;
930
931 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
932 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
933 return 0;
934 }
935
936 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
937 struct snd_ctl_elem_value * ucontrol)
938 {
939 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
940 struct saa7134_dev *dev = chip->dev;
941
942 int change, addr = kcontrol->private_value;
943 int left, right;
944
945 left = ucontrol->value.integer.value[0];
946 if (left < 0)
947 left = 0;
948 if (left > 20)
949 left = 20;
950 right = ucontrol->value.integer.value[1];
951 if (right < 0)
952 right = 0;
953 if (right > 20)
954 right = 20;
955 spin_lock_irq(&chip->mixer_lock);
956 change = 0;
957 if (chip->mixer_volume[addr][0] != left) {
958 change = 1;
959 right = left;
960 }
961 if (chip->mixer_volume[addr][1] != right) {
962 change = 1;
963 left = right;
964 }
965 if (change) {
966 switch (dev->pci->device) {
967 case PCI_DEVICE_ID_PHILIPS_SAA7134:
968 switch (addr) {
969 case MIXER_ADDR_TVTUNER:
970 left = 20;
971 break;
972 case MIXER_ADDR_LINE1:
973 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
974 (left > 10) ? 0x00 : 0x10);
975 break;
976 case MIXER_ADDR_LINE2:
977 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
978 (left > 10) ? 0x00 : 0x20);
979 break;
980 }
981 break;
982 case PCI_DEVICE_ID_PHILIPS_SAA7133:
983 case PCI_DEVICE_ID_PHILIPS_SAA7135:
984 switch (addr) {
985 case MIXER_ADDR_TVTUNER:
986 left = 20;
987 break;
988 case MIXER_ADDR_LINE1:
989 saa_andorb(0x0594, 0x10,
990 (left > 10) ? 0x00 : 0x10);
991 break;
992 case MIXER_ADDR_LINE2:
993 saa_andorb(0x0594, 0x20,
994 (left > 10) ? 0x00 : 0x20);
995 break;
996 }
997 break;
998 }
999 chip->mixer_volume[addr][0] = left;
1000 chip->mixer_volume[addr][1] = right;
1001 }
1002 spin_unlock_irq(&chip->mixer_lock);
1003 return change;
1004 }
1005
1006 #define SAA713x_CAPSRC(xname, xindex, addr) \
1007 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1008 .info = snd_saa7134_capsrc_info, \
1009 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
1010 .private_value = addr }
1011
1012 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
1013 struct snd_ctl_elem_info * uinfo)
1014 {
1015 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1016 uinfo->count = 2;
1017 uinfo->value.integer.min = 0;
1018 uinfo->value.integer.max = 1;
1019 return 0;
1020 }
1021
1022 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
1023 struct snd_ctl_elem_value * ucontrol)
1024 {
1025 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
1026 int addr = kcontrol->private_value;
1027
1028 spin_lock_irq(&chip->mixer_lock);
1029 if (chip->capture_source_addr == addr) {
1030 ucontrol->value.integer.value[0] = chip->capture_source[0];
1031 ucontrol->value.integer.value[1] = chip->capture_source[1];
1032 } else {
1033 ucontrol->value.integer.value[0] = 0;
1034 ucontrol->value.integer.value[1] = 0;
1035 }
1036 spin_unlock_irq(&chip->mixer_lock);
1037
1038 return 0;
1039 }
1040
1041 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
1042 struct snd_ctl_elem_value * ucontrol)
1043 {
1044 int left, right;
1045 left = ucontrol->value.integer.value[0] & 1;
1046 right = ucontrol->value.integer.value[1] & 1;
1047
1048 return snd_saa7134_capsrc_set(kcontrol, left, right, false);
1049 }
1050
1051 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
1052 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
1053 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
1054 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
1055 };
1056
1057 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
1058 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
1059 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
1060 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
1061 };
1062
1063 /*
1064 * ALSA mixer setup
1065 *
1066 * Called when initializing the board. Sets up the name and hooks up
1067 * the callbacks
1068 *
1069 */
1070
1071 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1072 {
1073 struct snd_card *card = chip->card;
1074 struct snd_kcontrol *kcontrol;
1075 unsigned int idx;
1076 int err, addr;
1077
1078 strcpy(card->mixername, "SAA7134 Mixer");
1079
1080 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1081 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1082 chip);
1083 err = snd_ctl_add(card, kcontrol);
1084 if (err < 0)
1085 return err;
1086 }
1087
1088 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1089 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1090 chip);
1091 addr = snd_saa7134_capture_controls[idx].private_value;
1092 chip->capture_ctl[addr] = kcontrol;
1093 err = snd_ctl_add(card, kcontrol);
1094 if (err < 0)
1095 return err;
1096 }
1097
1098 chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1099 return 0;
1100 }
1101
1102 static void snd_saa7134_free(struct snd_card * card)
1103 {
1104 snd_card_saa7134_t *chip = card->private_data;
1105
1106 if (chip->dev->dmasound.priv_data == NULL)
1107 return;
1108
1109 if (chip->irq >= 0)
1110 free_irq(chip->irq, &chip->dev->dmasound);
1111
1112 chip->dev->dmasound.priv_data = NULL;
1113
1114 }
1115
1116 /*
1117 * ALSA initialization
1118 *
1119 * Called by the init routine, once for each saa7134 device present,
1120 * it creates the basic structures and registers the ALSA devices
1121 *
1122 */
1123
1124 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1125 {
1126
1127 struct snd_card *card;
1128 snd_card_saa7134_t *chip;
1129 int err;
1130
1131
1132 if (devnum >= SNDRV_CARDS)
1133 return -ENODEV;
1134 if (!enable[devnum])
1135 return -ENODEV;
1136
1137 err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
1138 THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
1139 if (err < 0)
1140 return err;
1141
1142 strcpy(card->driver, "SAA7134");
1143
1144 /* Card "creation" */
1145
1146 card->private_free = snd_saa7134_free;
1147 chip = card->private_data;
1148
1149 spin_lock_init(&chip->lock);
1150 spin_lock_init(&chip->mixer_lock);
1151
1152 chip->dev = dev;
1153
1154 chip->card = card;
1155
1156 chip->pci = dev->pci;
1157 chip->iobase = pci_resource_start(dev->pci, 0);
1158
1159
1160 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1161 IRQF_SHARED, dev->name,
1162 (void*) &dev->dmasound);
1163
1164 if (err < 0) {
1165 pr_err("%s: can't get IRQ %d for ALSA\n",
1166 dev->name, dev->pci->irq);
1167 goto __nodev;
1168 }
1169
1170 chip->irq = dev->pci->irq;
1171
1172 mutex_init(&dev->dmasound.lock);
1173
1174 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1175 goto __nodev;
1176
1177 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1178 goto __nodev;
1179
1180 /* End of "creation" */
1181
1182 strcpy(card->shortname, "SAA7134");
1183 sprintf(card->longname, "%s at 0x%lx irq %d",
1184 chip->dev->name, chip->iobase, chip->irq);
1185
1186 pr_info("%s/alsa: %s registered as card %d\n",
1187 dev->name, card->longname, index[devnum]);
1188
1189 if ((err = snd_card_register(card)) == 0) {
1190 snd_saa7134_cards[devnum] = card;
1191 return 0;
1192 }
1193
1194 __nodev:
1195 snd_card_free(card);
1196 return err;
1197 }
1198
1199
1200 static int alsa_device_init(struct saa7134_dev *dev)
1201 {
1202 dev->dmasound.priv_data = dev;
1203 alsa_card_saa7134_create(dev,dev->nr);
1204 return 1;
1205 }
1206
1207 static int alsa_device_exit(struct saa7134_dev *dev)
1208 {
1209 if (!snd_saa7134_cards[dev->nr])
1210 return 1;
1211
1212 snd_card_free(snd_saa7134_cards[dev->nr]);
1213 snd_saa7134_cards[dev->nr] = NULL;
1214 return 1;
1215 }
1216
1217 /*
1218 * Module initializer
1219 *
1220 * Loops through present saa7134 cards, and assigns an ALSA device
1221 * to each one
1222 *
1223 */
1224
1225 static int saa7134_alsa_init(void)
1226 {
1227 struct saa7134_dev *dev = NULL;
1228 struct list_head *list;
1229
1230 saa7134_dmasound_init = alsa_device_init;
1231 saa7134_dmasound_exit = alsa_device_exit;
1232
1233 pr_info("saa7134 ALSA driver for DMA sound loaded\n");
1234
1235 list_for_each(list,&saa7134_devlist) {
1236 dev = list_entry(list, struct saa7134_dev, devlist);
1237 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1238 pr_info("%s/alsa: %s doesn't support digital audio\n",
1239 dev->name, saa7134_boards[dev->board].name);
1240 else
1241 alsa_device_init(dev);
1242 }
1243
1244 if (dev == NULL)
1245 pr_info("saa7134 ALSA: no saa7134 cards found\n");
1246
1247 return 0;
1248
1249 }
1250
1251 /*
1252 * Module destructor
1253 */
1254
1255 static void saa7134_alsa_exit(void)
1256 {
1257 int idx;
1258
1259 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1260 if (snd_saa7134_cards[idx])
1261 snd_card_free(snd_saa7134_cards[idx]);
1262 }
1263
1264 saa7134_dmasound_init = NULL;
1265 saa7134_dmasound_exit = NULL;
1266 pr_info("saa7134 ALSA driver for DMA sound unloaded\n");
1267
1268 return;
1269 }
1270
1271 /* We initialize this late, to make sure the sound system is up and running */
1272 late_initcall(saa7134_alsa_init);
1273 module_exit(saa7134_alsa_exit);
1274 MODULE_LICENSE("GPL");
1275 MODULE_AUTHOR("Ricardo Cerqueira");
CRIS linux kernel tree