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