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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / pci / saa7134 / saa7134-alsa.c
blob544ca57eee75caed8a3f5b8e98fa4c997283050e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * SAA713x ALSA support for V4L
4 */
5
6 #include "saa7134.h"
7 #include "saa7134-reg.h"
8
9 #include <linux/init.h>
10 #include <linux/slab.h>
11 #include <linux/time.h>
12 #include <linux/wait.h>
13 #include <linux/module.h>
14 #include <sound/core.h>
15 #include <sound/control.h>
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/initval.h>
19 #include <linux/interrupt.h>
20 #include <linux/vmalloc.h>
21
22 /*
23 * Configuration macros
24 */
25
26 /* defaults */
27 #define MIXER_ADDR_UNSELECTED -1
28 #define MIXER_ADDR_TVTUNER 0
29 #define MIXER_ADDR_LINE1 1
30 #define MIXER_ADDR_LINE2 2
31 #define MIXER_ADDR_LAST 2
32
33
34 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
35 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
36 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
37
38 module_param_array(index, int, NULL, 0444);
39 module_param_array(enable, int, NULL, 0444);
40 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
41 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
42
43 /*
44 * Main chip structure
45 */
46
47 typedef struct snd_card_saa7134 {
48 struct snd_card *card;
49 spinlock_t mixer_lock;
50 int mixer_volume[MIXER_ADDR_LAST+1][2];
51 int capture_source_addr;
52 int capture_source[2];
53 struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
54 struct pci_dev *pci;
55 struct saa7134_dev *dev;
56
57 unsigned long iobase;
58 s16 irq;
59 u16 mute_was_on;
60
61 spinlock_t lock;
62 } snd_card_saa7134_t;
63
64
65 /*
66 * PCM structure
67 */
68
69 typedef struct snd_card_saa7134_pcm {
70 struct saa7134_dev *dev;
71
72 spinlock_t lock;
73
74 struct snd_pcm_substream *substream;
75 } snd_card_saa7134_pcm_t;
76
77 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
78
79
80 /*
81 * saa7134 DMA audio stop
82 *
83 * Called when the capture device is released or the buffer overflows
84 *
85 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
86 *
87 */
88
89 static void saa7134_dma_stop(struct saa7134_dev *dev)
90 {
91 dev->dmasound.dma_blk = -1;
92 dev->dmasound.dma_running = 0;
93 saa7134_set_dmabits(dev);
94 }
95
96 /*
97 * saa7134 DMA audio start
98 *
99 * Called when preparing the capture device for use
100 *
101 * - Copied verbatim from saa7134-oss's dsp_dma_start.
102 *
103 */
104
105 static void saa7134_dma_start(struct saa7134_dev *dev)
106 {
107 dev->dmasound.dma_blk = 0;
108 dev->dmasound.dma_running = 1;
109 saa7134_set_dmabits(dev);
110 }
111
112 /*
113 * saa7134 audio DMA IRQ handler
114 *
115 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
116 * Handles shifting between the 2 buffers, manages the read counters,
117 * and notifies ALSA when periods elapse
118 *
119 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
120 *
121 */
122
123 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
124 unsigned long status)
125 {
126 int next_blk, reg = 0;
127
128 spin_lock(&dev->slock);
129 if (UNSET == dev->dmasound.dma_blk) {
130 pr_debug("irq: recording stopped\n");
131 goto done;
132 }
133 if (0 != (status & 0x0f000000))
134 pr_debug("irq: lost %ld\n", (status >> 24) & 0x0f);
135 if (0 == (status & 0x10000000)) {
136 /* odd */
137 if (0 == (dev->dmasound.dma_blk & 0x01))
138 reg = SAA7134_RS_BA1(6);
139 } else {
140 /* even */
141 if (1 == (dev->dmasound.dma_blk & 0x01))
142 reg = SAA7134_RS_BA2(6);
143 }
144 if (0 == reg) {
145 pr_debug("irq: field oops [%s]\n",
146 (status & 0x10000000) ? "even" : "odd");
147 goto done;
148 }
149
150 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
151 pr_debug("irq: overrun [full=%d/%d] - Blocks in %d\n",
152 dev->dmasound.read_count,
153 dev->dmasound.bufsize, dev->dmasound.blocks);
154 spin_unlock(&dev->slock);
155 snd_pcm_stop_xrun(dev->dmasound.substream);
156 return;
157 }
158
159 /* next block addr */
160 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
161 saa_writel(reg,next_blk * dev->dmasound.blksize);
162 pr_debug("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
163 (status & 0x10000000) ? "even" : "odd ", next_blk,
164 next_blk * dev->dmasound.blksize, dev->dmasound.blocks,
165 dev->dmasound.blksize, dev->dmasound.read_count);
166
167 /* update status & wake waiting readers */
168 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
169 dev->dmasound.read_count += dev->dmasound.blksize;
170
171 dev->dmasound.recording_on = reg;
172
173 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
174 spin_unlock(&dev->slock);
175 snd_pcm_period_elapsed(dev->dmasound.substream);
176 spin_lock(&dev->slock);
177 }
178
179 done:
180 spin_unlock(&dev->slock);
181
182 }
183
184 /*
185 * IRQ request handler
186 *
187 * Runs along with saa7134's IRQ handler, discards anything that isn't
188 * DMA sound
189 *
190 */
191
192 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
193 {
194 struct saa7134_dmasound *dmasound = dev_id;
195 struct saa7134_dev *dev = dmasound->priv_data;
196
197 unsigned long report, status;
198 int loop, handled = 0;
199
200 for (loop = 0; loop < 10; loop++) {
201 report = saa_readl(SAA7134_IRQ_REPORT);
202 status = saa_readl(SAA7134_IRQ_STATUS);
203
204 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
205 handled = 1;
206 saa_writel(SAA7134_IRQ_REPORT,
207 SAA7134_IRQ_REPORT_DONE_RA3);
208 saa7134_irq_alsa_done(dev, status);
209 } else {
210 goto out;
211 }
212 }
213
214 if (loop == 10) {
215 pr_debug("error! looping IRQ!");
216 }
217
218 out:
219 return IRQ_RETVAL(handled);
220 }
221
222 /*
223 * ALSA capture trigger
224 *
225 * - One of the ALSA capture callbacks.
226 *
227 * Called whenever a capture is started or stopped. Must be defined,
228 * but there's nothing we want to do here
229 *
230 */
231
232 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
233 int cmd)
234 {
235 struct snd_pcm_runtime *runtime = substream->runtime;
236 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
237 struct saa7134_dev *dev=pcm->dev;
238 int err = 0;
239
240 spin_lock(&dev->slock);
241 if (cmd == SNDRV_PCM_TRIGGER_START) {
242 /* start dma */
243 saa7134_dma_start(dev);
244 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
245 /* stop dma */
246 saa7134_dma_stop(dev);
247 } else {
248 err = -EINVAL;
249 }
250 spin_unlock(&dev->slock);
251
252 return err;
253 }
254
255 static int saa7134_alsa_dma_init(struct saa7134_dev *dev, int nr_pages)
256 {
257 struct saa7134_dmasound *dma = &dev->dmasound;
258 struct page *pg;
259 int i;
260
261 dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
262 if (NULL == dma->vaddr) {
263 pr_debug("vmalloc_32(%d pages) failed\n", nr_pages);
264 return -ENOMEM;
265 }
266
267 pr_debug("vmalloc is at addr %p, size=%d\n",
268 dma->vaddr, nr_pages << PAGE_SHIFT);
269
270 memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
271 dma->nr_pages = nr_pages;
272
273 dma->sglist = vzalloc(array_size(sizeof(*dma->sglist), dma->nr_pages));
274 if (NULL == dma->sglist)
275 goto vzalloc_err;
276
277 sg_init_table(dma->sglist, dma->nr_pages);
278 for (i = 0; i < dma->nr_pages; i++) {
279 pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE);
280 if (NULL == pg)
281 goto vmalloc_to_page_err;
282 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
283 }
284 return 0;
285
286 vmalloc_to_page_err:
287 vfree(dma->sglist);
288 dma->sglist = NULL;
289 vzalloc_err:
290 vfree(dma->vaddr);
291 dma->vaddr = NULL;
292 return -ENOMEM;
293 }
294
295 static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
296 {
297 struct saa7134_dmasound *dma = &dev->dmasound;
298
299 dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
300 dma->nr_pages, PCI_DMA_FROMDEVICE);
301
302 if (0 == dma->sglen) {
303 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
304 return -ENOMEM;
305 }
306 return 0;
307 }
308
309 static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
310 {
311 struct saa7134_dmasound *dma = &dev->dmasound;
312
313 if (!dma->sglen)
314 return 0;
315
316 dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE);
317 dma->sglen = 0;
318 return 0;
319 }
320
321 static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
322 {
323 vfree(dma->sglist);
324 dma->sglist = NULL;
325 vfree(dma->vaddr);
326 dma->vaddr = NULL;
327 return 0;
328 }
329
330 /*
331 * DMA buffer initialization
332 *
333 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in
334 * ALSA, but I was unable to use ALSA's own DMA, and had to force the
335 * usage of V4L's
336 *
337 * - Copied verbatim from saa7134-oss.
338 *
339 */
340
341 static int dsp_buffer_init(struct saa7134_dev *dev)
342 {
343 int err;
344
345 BUG_ON(!dev->dmasound.bufsize);
346
347 err = saa7134_alsa_dma_init(dev,
348 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
349 if (0 != err)
350 return err;
351 return 0;
352 }
353
354 /*
355 * DMA buffer release
356 *
357 * Called after closing the device, during snd_card_saa7134_capture_close
358 *
359 */
360
361 static int dsp_buffer_free(struct saa7134_dev *dev)
362 {
363 BUG_ON(!dev->dmasound.blksize);
364
365 saa7134_alsa_dma_free(&dev->dmasound);
366
367 dev->dmasound.blocks = 0;
368 dev->dmasound.blksize = 0;
369 dev->dmasound.bufsize = 0;
370
371 return 0;
372 }
373
374 /*
375 * Setting the capture source and updating the ALSA controls
376 */
377 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
378 int left, int right, bool force_notify)
379 {
380 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
381 int change = 0, addr = kcontrol->private_value;
382 int active, old_addr;
383 u32 anabar, xbarin;
384 int analog_io, rate;
385 struct saa7134_dev *dev;
386
387 dev = chip->dev;
388
389 spin_lock_irq(&chip->mixer_lock);
390
391 active = left != 0 || right != 0;
392 old_addr = chip->capture_source_addr;
393
394 /* The active capture source cannot be deactivated */
395 if (active) {
396 change = old_addr != addr ||
397 chip->capture_source[0] != left ||
398 chip->capture_source[1] != right;
399
400 chip->capture_source[0] = left;
401 chip->capture_source[1] = right;
402 chip->capture_source_addr = addr;
403 dev->dmasound.input = addr;
404 }
405 spin_unlock_irq(&chip->mixer_lock);
406
407 if (change) {
408 switch (dev->pci->device) {
409
410 case PCI_DEVICE_ID_PHILIPS_SAA7134:
411 switch (addr) {
412 case MIXER_ADDR_TVTUNER:
413 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
414 0xc0, 0xc0);
415 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
416 0x03, 0x00);
417 break;
418 case MIXER_ADDR_LINE1:
419 case MIXER_ADDR_LINE2:
420 analog_io = (MIXER_ADDR_LINE1 == addr) ?
421 0x00 : 0x08;
422 rate = (32000 == dev->dmasound.rate) ?
423 0x01 : 0x03;
424 saa_andorb(SAA7134_ANALOG_IO_SELECT,
425 0x08, analog_io);
426 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
427 0xc0, 0x80);
428 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
429 0x03, rate);
430 break;
431 }
432
433 break;
434 case PCI_DEVICE_ID_PHILIPS_SAA7133:
435 case PCI_DEVICE_ID_PHILIPS_SAA7135:
436 xbarin = 0x03; /* adc */
437 anabar = 0;
438 switch (addr) {
439 case MIXER_ADDR_TVTUNER:
440 xbarin = 0; /* Demodulator */
441 anabar = 2; /* DACs */
442 break;
443 case MIXER_ADDR_LINE1:
444 anabar = 0; /* aux1, aux1 */
445 break;
446 case MIXER_ADDR_LINE2:
447 anabar = 9; /* aux2, aux2 */
448 break;
449 }
450
451 /* output xbar always main channel */
452 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
453 0xbbbb10);
454
455 if (left || right) {
456 /* We've got data, turn the input on */
457 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
458 xbarin);
459 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
460 } else {
461 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
462 0);
463 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
464 }
465 break;
466 }
467 }
468
469 if (change) {
470 if (force_notify)
471 snd_ctl_notify(chip->card,
472 SNDRV_CTL_EVENT_MASK_VALUE,
473 &chip->capture_ctl[addr]->id);
474
475 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
476 snd_ctl_notify(chip->card,
477 SNDRV_CTL_EVENT_MASK_VALUE,
478 &chip->capture_ctl[old_addr]->id);
479 }
480
481 return change;
482 }
483
484 /*
485 * ALSA PCM preparation
486 *
487 * - One of the ALSA capture callbacks.
488 *
489 * Called right after the capture device is opened, this function configures
490 * the buffer using the previously defined functions, allocates the memory,
491 * sets up the hardware registers, and then starts the DMA. When this function
492 * returns, the audio should be flowing.
493 *
494 */
495
496 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
497 {
498 struct snd_pcm_runtime *runtime = substream->runtime;
499 int bswap, sign;
500 u32 fmt, control;
501 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
502 struct saa7134_dev *dev;
503 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
504
505 pcm->dev->dmasound.substream = substream;
506
507 dev = saa7134->dev;
508
509 if (snd_pcm_format_width(runtime->format) == 8)
510 fmt = 0x00;
511 else
512 fmt = 0x01;
513
514 if (snd_pcm_format_signed(runtime->format))
515 sign = 1;
516 else
517 sign = 0;
518
519 if (snd_pcm_format_big_endian(runtime->format))
520 bswap = 1;
521 else
522 bswap = 0;
523
524 switch (dev->pci->device) {
525 case PCI_DEVICE_ID_PHILIPS_SAA7134:
526 if (1 == runtime->channels)
527 fmt |= (1 << 3);
528 if (2 == runtime->channels)
529 fmt |= (3 << 3);
530 if (sign)
531 fmt |= 0x04;
532
533 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
534 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
535 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8);
536 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
537 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
538
539 break;
540 case PCI_DEVICE_ID_PHILIPS_SAA7133:
541 case PCI_DEVICE_ID_PHILIPS_SAA7135:
542 if (1 == runtime->channels)
543 fmt |= (1 << 4);
544 if (2 == runtime->channels)
545 fmt |= (2 << 4);
546 if (!sign)
547 fmt |= 0x04;
548 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
549 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
550 break;
551 }
552
553 pr_debug("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
554 runtime->format, runtime->channels, fmt,
555 bswap ? 'b' : '-');
556 /* dma: setup channel 6 (= AUDIO) */
557 control = SAA7134_RS_CONTROL_BURST_16 |
558 SAA7134_RS_CONTROL_ME |
559 (dev->dmasound.pt.dma >> 12);
560 if (bswap)
561 control |= SAA7134_RS_CONTROL_BSWAP;
562
563 saa_writel(SAA7134_RS_BA1(6),0);
564 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
565 saa_writel(SAA7134_RS_PITCH(6),0);
566 saa_writel(SAA7134_RS_CONTROL(6),control);
567
568 dev->dmasound.rate = runtime->rate;
569
570 /* Setup and update the card/ALSA controls */
571 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
572 true);
573
574 return 0;
575
576 }
577
578 /*
579 * ALSA pointer fetching
580 *
581 * - One of the ALSA capture callbacks.
582 *
583 * Called whenever a period elapses, it must return the current hardware
584 * position of the buffer.
585 * Also resets the read counter used to prevent overruns
586 *
587 */
588
589 static snd_pcm_uframes_t
590 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
591 {
592 struct snd_pcm_runtime *runtime = substream->runtime;
593 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
594 struct saa7134_dev *dev=pcm->dev;
595
596 if (dev->dmasound.read_count) {
597 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
598 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
599 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
600 dev->dmasound.read_offset = 0;
601 }
602
603 return bytes_to_frames(runtime, dev->dmasound.read_offset);
604 }
605
606 /*
607 * ALSA hardware capabilities definition
608 *
609 * Report only 32kHz for ALSA:
610 *
611 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
612 * only
613 * - SAA7134 for TV mode uses DemDec mode (32kHz)
614 * - Radio works in 32kHz only
615 * - When recording 48kHz from Line1/Line2, switching of capture source to TV
616 * means
617 * switching to 32kHz without any frequency translation
618 */
619
620 static const struct snd_pcm_hardware snd_card_saa7134_capture =
621 {
622 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
623 SNDRV_PCM_INFO_BLOCK_TRANSFER |
624 SNDRV_PCM_INFO_MMAP_VALID),
625 .formats = SNDRV_PCM_FMTBIT_S16_LE | \
626 SNDRV_PCM_FMTBIT_S16_BE | \
627 SNDRV_PCM_FMTBIT_S8 | \
628 SNDRV_PCM_FMTBIT_U8 | \
629 SNDRV_PCM_FMTBIT_U16_LE | \
630 SNDRV_PCM_FMTBIT_U16_BE,
631 .rates = SNDRV_PCM_RATE_32000,
632 .rate_min = 32000,
633 .rate_max = 32000,
634 .channels_min = 1,
635 .channels_max = 2,
636 .buffer_bytes_max = (256*1024),
637 .period_bytes_min = 64,
638 .period_bytes_max = (256*1024),
639 .periods_min = 4,
640 .periods_max = 1024,
641 };
642
643 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
644 {
645 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
646
647 kfree(pcm);
648 }
649
650
651 /*
652 * ALSA hardware params
653 *
654 * - One of the ALSA capture callbacks.
655 *
656 * Called on initialization, right before the PCM preparation
657 *
658 */
659
660 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
661 struct snd_pcm_hw_params * hw_params)
662 {
663 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
664 struct saa7134_dev *dev;
665 unsigned int period_size, periods;
666 int err;
667
668 period_size = params_period_bytes(hw_params);
669 periods = params_periods(hw_params);
670
671 if (period_size < 0x100 || period_size > 0x10000)
672 return -EINVAL;
673 if (periods < 4)
674 return -EINVAL;
675 if (period_size * periods > 1024 * 1024)
676 return -EINVAL;
677
678 dev = saa7134->dev;
679
680 if (dev->dmasound.blocks == periods &&
681 dev->dmasound.blksize == period_size)
682 return 0;
683
684 /* release the old buffer */
685 if (substream->runtime->dma_area) {
686 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
687 saa7134_alsa_dma_unmap(dev);
688 dsp_buffer_free(dev);
689 substream->runtime->dma_area = NULL;
690 }
691 dev->dmasound.blocks = periods;
692 dev->dmasound.blksize = period_size;
693 dev->dmasound.bufsize = period_size * periods;
694
695 err = dsp_buffer_init(dev);
696 if (0 != err) {
697 dev->dmasound.blocks = 0;
698 dev->dmasound.blksize = 0;
699 dev->dmasound.bufsize = 0;
700 return err;
701 }
702
703 err = saa7134_alsa_dma_map(dev);
704 if (err) {
705 dsp_buffer_free(dev);
706 return err;
707 }
708 err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
709 if (err) {
710 saa7134_alsa_dma_unmap(dev);
711 dsp_buffer_free(dev);
712 return err;
713 }
714 err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
715 dev->dmasound.sglist, dev->dmasound.sglen, 0);
716 if (err) {
717 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
718 saa7134_alsa_dma_unmap(dev);
719 dsp_buffer_free(dev);
720 return err;
721 }
722
723 /* I should be able to use runtime->dma_addr in the control
724 byte, but it doesn't work. So I allocate the DMA using the
725 V4L functions, and force ALSA to use that as the DMA area */
726
727 substream->runtime->dma_area = dev->dmasound.vaddr;
728 substream->runtime->dma_bytes = dev->dmasound.bufsize;
729 substream->runtime->dma_addr = 0;
730
731 return 0;
732
733 }
734
735 /*
736 * ALSA hardware release
737 *
738 * - One of the ALSA capture callbacks.
739 *
740 * Called after closing the device, but before snd_card_saa7134_capture_close
741 * It stops the DMA audio and releases the buffers.
742 *
743 */
744
745 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
746 {
747 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
748 struct saa7134_dev *dev;
749
750 dev = saa7134->dev;
751
752 if (substream->runtime->dma_area) {
753 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
754 saa7134_alsa_dma_unmap(dev);
755 dsp_buffer_free(dev);
756 substream->runtime->dma_area = NULL;
757 }
758
759 return 0;
760 }
761
762 /*
763 * ALSA capture finish
764 *
765 * - One of the ALSA capture callbacks.
766 *
767 * Called after closing the device.
768 *
769 */
770
771 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
772 {
773 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
774 struct saa7134_dev *dev = saa7134->dev;
775
776 if (saa7134->mute_was_on) {
777 dev->ctl_mute = 1;
778 saa7134_tvaudio_setmute(dev);
779 }
780 return 0;
781 }
782
783 /*
784 * ALSA capture start
785 *
786 * - One of the ALSA capture callbacks.
787 *
788 * Called when opening the device. It creates and populates the PCM
789 * structure
790 *
791 */
792
793 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
794 {
795 struct snd_pcm_runtime *runtime = substream->runtime;
796 snd_card_saa7134_pcm_t *pcm;
797 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
798 struct saa7134_dev *dev;
799 int amux, err;
800
801 if (!saa7134) {
802 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n");
803 return -ENODEV;
804 }
805 dev = saa7134->dev;
806 mutex_lock(&dev->dmasound.lock);
807
808 dev->dmasound.read_count = 0;
809 dev->dmasound.read_offset = 0;
810
811 amux = dev->input->amux;
812 if ((amux < 1) || (amux > 3))
813 amux = 1;
814 dev->dmasound.input = amux - 1;
815
816 mutex_unlock(&dev->dmasound.lock);
817
818 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
819 if (pcm == NULL)
820 return -ENOMEM;
821
822 pcm->dev=saa7134->dev;
823
824 spin_lock_init(&pcm->lock);
825
826 pcm->substream = substream;
827 runtime->private_data = pcm;
828 runtime->private_free = snd_card_saa7134_runtime_free;
829 runtime->hw = snd_card_saa7134_capture;
830
831 if (dev->ctl_mute != 0) {
832 saa7134->mute_was_on = 1;
833 dev->ctl_mute = 0;
834 saa7134_tvaudio_setmute(dev);
835 }
836
837 err = snd_pcm_hw_constraint_integer(runtime,
838 SNDRV_PCM_HW_PARAM_PERIODS);
839 if (err < 0)
840 return err;
841
842 err = snd_pcm_hw_constraint_step(runtime, 0,
843 SNDRV_PCM_HW_PARAM_PERIODS, 2);
844 if (err < 0)
845 return err;
846
847 return 0;
848 }
849
850 /*
851 * page callback (needed for mmap)
852 */
853
854 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
855 unsigned long offset)
856 {
857 void *pageptr = substream->runtime->dma_area + offset;
858 return vmalloc_to_page(pageptr);
859 }
860
861 /*
862 * ALSA capture callbacks definition
863 */
864
865 static const struct snd_pcm_ops snd_card_saa7134_capture_ops = {
866 .open = snd_card_saa7134_capture_open,
867 .close = snd_card_saa7134_capture_close,
868 .hw_params = snd_card_saa7134_hw_params,
869 .hw_free = snd_card_saa7134_hw_free,
870 .prepare = snd_card_saa7134_capture_prepare,
871 .trigger = snd_card_saa7134_capture_trigger,
872 .pointer = snd_card_saa7134_capture_pointer,
873 .page = snd_card_saa7134_page,
874 };
875
876 /*
877 * ALSA PCM setup
878 *
879 * Called when initializing the board. Sets up the name and hooks up
880 * the callbacks
881 *
882 */
883
884 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
885 {
886 struct snd_pcm *pcm;
887 int err;
888
889 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
890 return err;
891 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
892 pcm->private_data = saa7134;
893 pcm->info_flags = 0;
894 strscpy(pcm->name, "SAA7134 PCM", sizeof(pcm->name));
895 return 0;
896 }
897
898 #define SAA713x_VOLUME(xname, xindex, addr) \
899 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
900 .info = snd_saa7134_volume_info, \
901 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
902 .private_value = addr }
903
904 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
905 struct snd_ctl_elem_info * uinfo)
906 {
907 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
908 uinfo->count = 2;
909 uinfo->value.integer.min = 0;
910 uinfo->value.integer.max = 20;
911 return 0;
912 }
913
914 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
915 struct snd_ctl_elem_value * ucontrol)
916 {
917 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
918 int addr = kcontrol->private_value;
919
920 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
921 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
922 return 0;
923 }
924
925 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
926 struct snd_ctl_elem_value * ucontrol)
927 {
928 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
929 struct saa7134_dev *dev = chip->dev;
930
931 int change, addr = kcontrol->private_value;
932 int left, right;
933
934 left = ucontrol->value.integer.value[0];
935 if (left < 0)
936 left = 0;
937 if (left > 20)
938 left = 20;
939 right = ucontrol->value.integer.value[1];
940 if (right < 0)
941 right = 0;
942 if (right > 20)
943 right = 20;
944 spin_lock_irq(&chip->mixer_lock);
945 change = 0;
946 if (chip->mixer_volume[addr][0] != left) {
947 change = 1;
948 right = left;
949 }
950 if (chip->mixer_volume[addr][1] != right) {
951 change = 1;
952 left = right;
953 }
954 if (change) {
955 switch (dev->pci->device) {
956 case PCI_DEVICE_ID_PHILIPS_SAA7134:
957 switch (addr) {
958 case MIXER_ADDR_TVTUNER:
959 left = 20;
960 break;
961 case MIXER_ADDR_LINE1:
962 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
963 (left > 10) ? 0x00 : 0x10);
964 break;
965 case MIXER_ADDR_LINE2:
966 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
967 (left > 10) ? 0x00 : 0x20);
968 break;
969 }
970 break;
971 case PCI_DEVICE_ID_PHILIPS_SAA7133:
972 case PCI_DEVICE_ID_PHILIPS_SAA7135:
973 switch (addr) {
974 case MIXER_ADDR_TVTUNER:
975 left = 20;
976 break;
977 case MIXER_ADDR_LINE1:
978 saa_andorb(0x0594, 0x10,
979 (left > 10) ? 0x00 : 0x10);
980 break;
981 case MIXER_ADDR_LINE2:
982 saa_andorb(0x0594, 0x20,
983 (left > 10) ? 0x00 : 0x20);
984 break;
985 }
986 break;
987 }
988 chip->mixer_volume[addr][0] = left;
989 chip->mixer_volume[addr][1] = right;
990 }
991 spin_unlock_irq(&chip->mixer_lock);
992 return change;
993 }
994
995 #define SAA713x_CAPSRC(xname, xindex, addr) \
996 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
997 .info = snd_saa7134_capsrc_info, \
998 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
999 .private_value = addr }
1000
1001 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
1002 struct snd_ctl_elem_info * uinfo)
1003 {
1004 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1005 uinfo->count = 2;
1006 uinfo->value.integer.min = 0;
1007 uinfo->value.integer.max = 1;
1008 return 0;
1009 }
1010
1011 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
1012 struct snd_ctl_elem_value * ucontrol)
1013 {
1014 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
1015 int addr = kcontrol->private_value;
1016
1017 spin_lock_irq(&chip->mixer_lock);
1018 if (chip->capture_source_addr == addr) {
1019 ucontrol->value.integer.value[0] = chip->capture_source[0];
1020 ucontrol->value.integer.value[1] = chip->capture_source[1];
1021 } else {
1022 ucontrol->value.integer.value[0] = 0;
1023 ucontrol->value.integer.value[1] = 0;
1024 }
1025 spin_unlock_irq(&chip->mixer_lock);
1026
1027 return 0;
1028 }
1029
1030 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
1031 struct snd_ctl_elem_value * ucontrol)
1032 {
1033 int left, right;
1034 left = ucontrol->value.integer.value[0] & 1;
1035 right = ucontrol->value.integer.value[1] & 1;
1036
1037 return snd_saa7134_capsrc_set(kcontrol, left, right, false);
1038 }
1039
1040 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
1041 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
1042 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
1043 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
1044 };
1045
1046 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
1047 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
1048 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
1049 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
1050 };
1051
1052 /*
1053 * ALSA mixer setup
1054 *
1055 * Called when initializing the board. Sets up the name and hooks up
1056 * the callbacks
1057 *
1058 */
1059
1060 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1061 {
1062 struct snd_card *card = chip->card;
1063 struct snd_kcontrol *kcontrol;
1064 unsigned int idx;
1065 int err, addr;
1066
1067 strscpy(card->mixername, "SAA7134 Mixer", sizeof(card->mixername));
1068
1069 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1070 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1071 chip);
1072 err = snd_ctl_add(card, kcontrol);
1073 if (err < 0)
1074 return err;
1075 }
1076
1077 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1078 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1079 chip);
1080 addr = snd_saa7134_capture_controls[idx].private_value;
1081 chip->capture_ctl[addr] = kcontrol;
1082 err = snd_ctl_add(card, kcontrol);
1083 if (err < 0)
1084 return err;
1085 }
1086
1087 chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1088 return 0;
1089 }
1090
1091 static void snd_saa7134_free(struct snd_card * card)
1092 {
1093 snd_card_saa7134_t *chip = card->private_data;
1094
1095 if (chip->dev->dmasound.priv_data == NULL)
1096 return;
1097
1098 if (chip->irq >= 0)
1099 free_irq(chip->irq, &chip->dev->dmasound);
1100
1101 chip->dev->dmasound.priv_data = NULL;
1102
1103 }
1104
1105 /*
1106 * ALSA initialization
1107 *
1108 * Called by the init routine, once for each saa7134 device present,
1109 * it creates the basic structures and registers the ALSA devices
1110 *
1111 */
1112
1113 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1114 {
1115
1116 struct snd_card *card;
1117 snd_card_saa7134_t *chip;
1118 int err;
1119
1120
1121 if (devnum >= SNDRV_CARDS)
1122 return -ENODEV;
1123 if (!enable[devnum])
1124 return -ENODEV;
1125
1126 err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
1127 THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
1128 if (err < 0)
1129 return err;
1130
1131 strscpy(card->driver, "SAA7134", sizeof(card->driver));
1132
1133 /* Card "creation" */
1134
1135 card->private_free = snd_saa7134_free;
1136 chip = card->private_data;
1137
1138 spin_lock_init(&chip->lock);
1139 spin_lock_init(&chip->mixer_lock);
1140
1141 chip->dev = dev;
1142
1143 chip->card = card;
1144
1145 chip->pci = dev->pci;
1146 chip->iobase = pci_resource_start(dev->pci, 0);
1147
1148
1149 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1150 IRQF_SHARED, dev->name,
1151 (void*) &dev->dmasound);
1152
1153 if (err < 0) {
1154 pr_err("%s: can't get IRQ %d for ALSA\n",
1155 dev->name, dev->pci->irq);
1156 goto __nodev;
1157 }
1158
1159 chip->irq = dev->pci->irq;
1160
1161 mutex_init(&dev->dmasound.lock);
1162
1163 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1164 goto __nodev;
1165
1166 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1167 goto __nodev;
1168
1169 /* End of "creation" */
1170
1171 strscpy(card->shortname, "SAA7134", sizeof(card->shortname));
1172 sprintf(card->longname, "%s at 0x%lx irq %d",
1173 chip->dev->name, chip->iobase, chip->irq);
1174
1175 pr_info("%s/alsa: %s registered as card %d\n",
1176 dev->name, card->longname, index[devnum]);
1177
1178 if ((err = snd_card_register(card)) == 0) {
1179 snd_saa7134_cards[devnum] = card;
1180 return 0;
1181 }
1182
1183 __nodev:
1184 snd_card_free(card);
1185 return err;
1186 }
1187
1188
1189 static int alsa_device_init(struct saa7134_dev *dev)
1190 {
1191 dev->dmasound.priv_data = dev;
1192 alsa_card_saa7134_create(dev,dev->nr);
1193 return 1;
1194 }
1195
1196 static int alsa_device_exit(struct saa7134_dev *dev)
1197 {
1198 if (!snd_saa7134_cards[dev->nr])
1199 return 1;
1200
1201 snd_card_free(snd_saa7134_cards[dev->nr]);
1202 snd_saa7134_cards[dev->nr] = NULL;
1203 return 1;
1204 }
1205
1206 /*
1207 * Module initializer
1208 *
1209 * Loops through present saa7134 cards, and assigns an ALSA device
1210 * to each one
1211 *
1212 */
1213
1214 static int saa7134_alsa_init(void)
1215 {
1216 struct saa7134_dev *dev = NULL;
1217 struct list_head *list;
1218
1219 saa7134_dmasound_init = alsa_device_init;
1220 saa7134_dmasound_exit = alsa_device_exit;
1221
1222 pr_info("saa7134 ALSA driver for DMA sound loaded\n");
1223
1224 list_for_each(list,&saa7134_devlist) {
1225 dev = list_entry(list, struct saa7134_dev, devlist);
1226 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1227 pr_info("%s/alsa: %s doesn't support digital audio\n",
1228 dev->name, saa7134_boards[dev->board].name);
1229 else
1230 alsa_device_init(dev);
1231 }
1232
1233 if (dev == NULL)
1234 pr_info("saa7134 ALSA: no saa7134 cards found\n");
1235
1236 return 0;
1237
1238 }
1239
1240 /*
1241 * Module destructor
1242 */
1243
1244 static void saa7134_alsa_exit(void)
1245 {
1246 int idx;
1247
1248 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1249 if (snd_saa7134_cards[idx])
1250 snd_card_free(snd_saa7134_cards[idx]);
1251 }
1252
1253 saa7134_dmasound_init = NULL;
1254 saa7134_dmasound_exit = NULL;
1255 pr_info("saa7134 ALSA driver for DMA sound unloaded\n");
1256
1257 return;
1258 }
1259
1260 /* We initialize this late, to make sure the sound system is up and running */
1261 late_initcall(saa7134_alsa_init);
1262 module_exit(saa7134_alsa_exit);
1263 MODULE_LICENSE("GPL");
1264 MODULE_AUTHOR("Ricardo Cerqueira");
Linux with added FPC-III support