1 // SPDX-License-Identifier: GPL-2.0-only
3 * SAA713x ALSA support for V4L
7 #include "saa7134-reg.h"
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>
23 * Configuration macros
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
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};
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).");
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];
55 struct saa7134_dev *dev;
69 typedef struct snd_card_saa7134_pcm {
70 struct saa7134_dev *dev;
74 struct snd_pcm_substream *substream;
75 } snd_card_saa7134_pcm_t;
77 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
81 * saa7134 DMA audio stop
83 * Called when the capture device is released or the buffer overflows
85 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
89 static void saa7134_dma_stop(struct saa7134_dev *dev)
91 dev->dmasound.dma_blk = -1;
92 dev->dmasound.dma_running = 0;
93 saa7134_set_dmabits(dev);
97 * saa7134 DMA audio start
99 * Called when preparing the capture device for use
101 * - Copied verbatim from saa7134-oss's dsp_dma_start.
105 static void saa7134_dma_start(struct saa7134_dev *dev)
107 dev->dmasound.dma_blk = 0;
108 dev->dmasound.dma_running = 1;
109 saa7134_set_dmabits(dev);
113 * saa7134 audio DMA IRQ handler
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
119 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
123 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
124 unsigned long status)
126 int next_blk, reg = 0;
128 spin_lock(&dev->slock);
129 if (UNSET == dev->dmasound.dma_blk) {
130 pr_debug("irq: recording stopped\n");
133 if (0 != (status & 0x0f000000))
134 pr_debug("irq: lost %ld\n", (status >> 24) & 0x0f);
135 if (0 == (status & 0x10000000)) {
137 if (0 == (dev->dmasound.dma_blk & 0x01))
138 reg = SAA7134_RS_BA1(6);
141 if (1 == (dev->dmasound.dma_blk & 0x01))
142 reg = SAA7134_RS_BA2(6);
145 pr_debug("irq: field oops [%s]\n",
146 (status & 0x10000000) ? "even" : "odd");
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);
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);
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;
171 dev->dmasound.recording_on = reg;
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);
180 spin_unlock(&dev->slock);
185 * IRQ request handler
187 * Runs along with saa7134's IRQ handler, discards anything that isn't
192 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
194 struct saa7134_dmasound *dmasound = dev_id;
195 struct saa7134_dev *dev = dmasound->priv_data;
197 unsigned long report, status;
198 int loop, handled = 0;
200 for (loop = 0; loop < 10; loop++) {
201 report = saa_readl(SAA7134_IRQ_REPORT);
202 status = saa_readl(SAA7134_IRQ_STATUS);
204 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
206 saa_writel(SAA7134_IRQ_REPORT,
207 SAA7134_IRQ_REPORT_DONE_RA3);
208 saa7134_irq_alsa_done(dev, status);
215 pr_debug("error! looping IRQ!");
219 return IRQ_RETVAL(handled);
223 * ALSA capture trigger
225 * - One of the ALSA capture callbacks.
227 * Called whenever a capture is started or stopped. Must be defined,
228 * but there's nothing we want to do here
232 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
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;
240 spin_lock(&dev->slock);
241 if (cmd == SNDRV_PCM_TRIGGER_START) {
243 saa7134_dma_start(dev);
244 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
246 saa7134_dma_stop(dev);
250 spin_unlock(&dev->slock);
255 static int saa7134_alsa_dma_init(struct saa7134_dev *dev,
256 unsigned long nr_pages)
258 struct saa7134_dmasound *dma = &dev->dmasound;
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);
268 pr_debug("vmalloc is at addr %p, size=%lu\n",
269 dma->vaddr, nr_pages << PAGE_SHIFT);
271 memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
272 dma->nr_pages = nr_pages;
274 dma->sglist = vzalloc(array_size(sizeof(*dma->sglist), dma->nr_pages));
275 if (NULL == dma->sglist)
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);
282 goto vmalloc_to_page_err;
283 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
296 static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
298 struct saa7134_dmasound *dma = &dev->dmasound;
300 dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
301 dma->nr_pages, DMA_FROM_DEVICE);
303 if (0 == dma->sglen) {
304 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
310 static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
312 struct saa7134_dmasound *dma = &dev->dmasound;
317 dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->nr_pages, DMA_FROM_DEVICE);
322 static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
332 * DMA buffer initialization
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
338 * - Copied verbatim from saa7134-oss.
342 static int dsp_buffer_init(struct saa7134_dev *dev)
346 BUG_ON(!dev->dmasound.bufsize);
348 err = saa7134_alsa_dma_init(dev,
349 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
358 * Called after closing the device, during snd_card_saa7134_capture_close
362 static int dsp_buffer_free(struct saa7134_dev *dev)
364 BUG_ON(!dev->dmasound.blksize);
366 saa7134_alsa_dma_free(&dev->dmasound);
368 dev->dmasound.blocks = 0;
369 dev->dmasound.blksize = 0;
370 dev->dmasound.bufsize = 0;
376 * Setting the capture source and updating the ALSA controls
378 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
379 int left, int right, bool force_notify)
381 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
382 int change = 0, addr = kcontrol->private_value;
383 int active, old_addr;
386 struct saa7134_dev *dev;
390 spin_lock_irq(&chip->mixer_lock);
392 active = left != 0 || right != 0;
393 old_addr = chip->capture_source_addr;
395 /* The active capture source cannot be deactivated */
397 change = old_addr != addr ||
398 chip->capture_source[0] != left ||
399 chip->capture_source[1] != right;
401 chip->capture_source[0] = left;
402 chip->capture_source[1] = right;
403 chip->capture_source_addr = addr;
404 dev->dmasound.input = addr;
406 spin_unlock_irq(&chip->mixer_lock);
409 switch (dev->pci->device) {
411 case PCI_DEVICE_ID_PHILIPS_SAA7134:
413 case MIXER_ADDR_TVTUNER:
414 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
416 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
419 case MIXER_ADDR_LINE1:
420 case MIXER_ADDR_LINE2:
421 analog_io = (MIXER_ADDR_LINE1 == addr) ?
423 rate = (32000 == dev->dmasound.rate) ?
425 saa_andorb(SAA7134_ANALOG_IO_SELECT,
427 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
429 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
435 case PCI_DEVICE_ID_PHILIPS_SAA7133:
436 case PCI_DEVICE_ID_PHILIPS_SAA7135:
437 xbarin = 0x03; /* adc */
440 case MIXER_ADDR_TVTUNER:
441 xbarin = 0; /* Demodulator */
442 anabar = 2; /* DACs */
444 case MIXER_ADDR_LINE1:
445 anabar = 0; /* aux1, aux1 */
447 case MIXER_ADDR_LINE2:
448 anabar = 9; /* aux2, aux2 */
452 /* output xbar always main channel */
453 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
457 /* We've got data, turn the input on */
458 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
460 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
462 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
464 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
472 snd_ctl_notify(chip->card,
473 SNDRV_CTL_EVENT_MASK_VALUE,
474 &chip->capture_ctl[addr]->id);
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);
486 * ALSA PCM preparation
488 * - One of the ALSA capture callbacks.
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.
497 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
499 struct snd_pcm_runtime *runtime = substream->runtime;
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;
506 pcm->dev->dmasound.substream = substream;
510 if (snd_pcm_format_width(runtime->format) == 8)
515 if (snd_pcm_format_signed(runtime->format))
520 if (snd_pcm_format_big_endian(runtime->format))
525 switch (dev->pci->device) {
526 case PCI_DEVICE_ID_PHILIPS_SAA7134:
527 if (1 == runtime->channels)
529 if (2 == runtime->channels)
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);
541 case PCI_DEVICE_ID_PHILIPS_SAA7133:
542 case PCI_DEVICE_ID_PHILIPS_SAA7135:
543 if (1 == runtime->channels)
545 if (2 == runtime->channels)
549 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
550 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
554 pr_debug("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
555 runtime->format, runtime->channels, fmt,
557 /* dma: setup channel 6 (= AUDIO) */
558 control = SAA7134_RS_CONTROL_BURST_16 |
559 SAA7134_RS_CONTROL_ME |
560 (dev->dmasound.pt.dma >> 12);
562 control |= SAA7134_RS_CONTROL_BSWAP;
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);
569 dev->dmasound.rate = runtime->rate;
571 /* Setup and update the card/ALSA controls */
572 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
580 * ALSA pointer fetching
582 * - One of the ALSA capture callbacks.
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
590 static snd_pcm_uframes_t
591 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
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;
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;
604 return bytes_to_frames(runtime, dev->dmasound.read_offset);
608 * ALSA hardware capabilities definition
610 * Report only 32kHz for ALSA:
612 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
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
618 * switching to 32kHz without any frequency translation
621 static const struct snd_pcm_hardware snd_card_saa7134_capture =
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,
637 .buffer_bytes_max = (256*1024),
638 .period_bytes_min = 64,
639 .period_bytes_max = (256*1024),
644 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
646 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
653 * ALSA hardware params
655 * - One of the ALSA capture callbacks.
657 * Called on initialization, right before the PCM preparation
661 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
662 struct snd_pcm_hw_params * hw_params)
664 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
665 struct saa7134_dev *dev;
666 unsigned int period_size, periods;
669 period_size = params_period_bytes(hw_params);
670 periods = params_periods(hw_params);
672 if (period_size < 0x100 || period_size > 0x10000)
676 if (period_size * periods > 1024 * 1024)
681 if (dev->dmasound.blocks == periods &&
682 dev->dmasound.blksize == period_size)
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;
692 dev->dmasound.blocks = periods;
693 dev->dmasound.blksize = period_size;
694 dev->dmasound.bufsize = period_size * periods;
696 err = dsp_buffer_init(dev);
698 dev->dmasound.blocks = 0;
699 dev->dmasound.blksize = 0;
700 dev->dmasound.bufsize = 0;
704 err = saa7134_alsa_dma_map(dev);
706 dsp_buffer_free(dev);
709 err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
711 saa7134_alsa_dma_unmap(dev);
712 dsp_buffer_free(dev);
715 err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
716 dev->dmasound.sglist, dev->dmasound.sglen, 0);
718 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
719 saa7134_alsa_dma_unmap(dev);
720 dsp_buffer_free(dev);
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 */
728 substream->runtime->dma_area = dev->dmasound.vaddr;
729 substream->runtime->dma_bytes = dev->dmasound.bufsize;
730 substream->runtime->dma_addr = 0;
737 * ALSA hardware release
739 * - One of the ALSA capture callbacks.
741 * Called after closing the device, but before snd_card_saa7134_capture_close
742 * It stops the DMA audio and releases the buffers.
746 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
748 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
749 struct saa7134_dev *dev;
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;
764 * ALSA capture finish
766 * - One of the ALSA capture callbacks.
768 * Called after closing the device.
772 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
774 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
775 struct saa7134_dev *dev = saa7134->dev;
777 if (saa7134->mute_was_on) {
779 saa7134_tvaudio_setmute(dev);
787 * - One of the ALSA capture callbacks.
789 * Called when opening the device. It creates and populates the PCM
794 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
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;
803 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n");
807 mutex_lock(&dev->dmasound.lock);
809 dev->dmasound.read_count = 0;
810 dev->dmasound.read_offset = 0;
812 amux = dev->input->amux;
813 if ((amux < 1) || (amux > 3))
815 dev->dmasound.input = amux - 1;
817 mutex_unlock(&dev->dmasound.lock);
819 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
823 pcm->dev=saa7134->dev;
825 spin_lock_init(&pcm->lock);
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;
832 if (dev->ctl_mute != 0) {
833 saa7134->mute_was_on = 1;
835 saa7134_tvaudio_setmute(dev);
838 err = snd_pcm_hw_constraint_integer(runtime,
839 SNDRV_PCM_HW_PARAM_PERIODS);
843 err = snd_pcm_hw_constraint_step(runtime, 0,
844 SNDRV_PCM_HW_PARAM_PERIODS, 2);
852 * page callback (needed for mmap)
855 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
856 unsigned long offset)
858 void *pageptr = substream->runtime->dma_area + offset;
859 return vmalloc_to_page(pageptr);
863 * ALSA capture callbacks definition
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,
880 * Called when initializing the board. Sets up the name and hooks up
885 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
890 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
892 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
893 pcm->private_data = saa7134;
895 strscpy(pcm->name, "SAA7134 PCM", sizeof(pcm->name));
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 }
905 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
906 struct snd_ctl_elem_info * uinfo)
908 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
910 uinfo->value.integer.min = 0;
911 uinfo->value.integer.max = 20;
915 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
916 struct snd_ctl_elem_value * ucontrol)
918 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
919 int addr = kcontrol->private_value;
921 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
922 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
926 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
927 struct snd_ctl_elem_value * ucontrol)
929 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
930 struct saa7134_dev *dev = chip->dev;
932 int change, addr = kcontrol->private_value;
935 left = ucontrol->value.integer.value[0];
940 right = ucontrol->value.integer.value[1];
945 spin_lock_irq(&chip->mixer_lock);
947 if (chip->mixer_volume[addr][0] != left) {
951 if (chip->mixer_volume[addr][1] != right) {
956 switch (dev->pci->device) {
957 case PCI_DEVICE_ID_PHILIPS_SAA7134:
959 case MIXER_ADDR_TVTUNER:
962 case MIXER_ADDR_LINE1:
963 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
964 (left > 10) ? 0x00 : 0x10);
966 case MIXER_ADDR_LINE2:
967 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
968 (left > 10) ? 0x00 : 0x20);
972 case PCI_DEVICE_ID_PHILIPS_SAA7133:
973 case PCI_DEVICE_ID_PHILIPS_SAA7135:
975 case MIXER_ADDR_TVTUNER:
978 case MIXER_ADDR_LINE1:
979 saa_andorb(0x0594, 0x10,
980 (left > 10) ? 0x00 : 0x10);
982 case MIXER_ADDR_LINE2:
983 saa_andorb(0x0594, 0x20,
984 (left > 10) ? 0x00 : 0x20);
989 chip->mixer_volume[addr][0] = left;
990 chip->mixer_volume[addr][1] = right;
992 spin_unlock_irq(&chip->mixer_lock);
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 }
1002 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
1003 struct snd_ctl_elem_info * uinfo)
1005 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1007 uinfo->value.integer.min = 0;
1008 uinfo->value.integer.max = 1;
1012 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
1013 struct snd_ctl_elem_value * ucontrol)
1015 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
1016 int addr = kcontrol->private_value;
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];
1023 ucontrol->value.integer.value[0] = 0;
1024 ucontrol->value.integer.value[1] = 0;
1026 spin_unlock_irq(&chip->mixer_lock);
1031 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
1032 struct snd_ctl_elem_value * ucontrol)
1035 left = ucontrol->value.integer.value[0] & 1;
1036 right = ucontrol->value.integer.value[1] & 1;
1038 return snd_saa7134_capsrc_set(kcontrol, left, right, false);
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),
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),
1056 * Called when initializing the board. Sets up the name and hooks up
1061 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1063 struct snd_card *card = chip->card;
1064 struct snd_kcontrol *kcontrol;
1068 strscpy(card->mixername, "SAA7134 Mixer", sizeof(card->mixername));
1070 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1071 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1073 err = snd_ctl_add(card, kcontrol);
1078 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1079 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1081 addr = snd_saa7134_capture_controls[idx].private_value;
1082 chip->capture_ctl[addr] = kcontrol;
1083 err = snd_ctl_add(card, kcontrol);
1088 chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1092 static void snd_saa7134_free(struct snd_card * card)
1094 snd_card_saa7134_t *chip = card->private_data;
1096 if (chip->dev->dmasound.priv_data == NULL)
1100 free_irq(chip->irq, &chip->dev->dmasound);
1102 chip->dev->dmasound.priv_data = NULL;
1107 * ALSA initialization
1109 * Called by the init routine, once for each saa7134 device present,
1110 * it creates the basic structures and registers the ALSA devices
1114 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1117 struct snd_card *card;
1118 snd_card_saa7134_t *chip;
1122 if (devnum >= SNDRV_CARDS)
1124 if (!enable[devnum])
1127 err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
1128 THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
1132 strscpy(card->driver, "SAA7134", sizeof(card->driver));
1134 /* Card "creation" */
1136 card->private_free = snd_saa7134_free;
1137 chip = card->private_data;
1139 spin_lock_init(&chip->lock);
1140 spin_lock_init(&chip->mixer_lock);
1146 chip->pci = dev->pci;
1147 chip->iobase = pci_resource_start(dev->pci, 0);
1150 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1151 IRQF_SHARED, dev->name,
1152 (void*) &dev->dmasound);
1155 pr_err("%s: can't get IRQ %d for ALSA\n",
1156 dev->name, dev->pci->irq);
1160 chip->irq = dev->pci->irq;
1162 mutex_init(&dev->dmasound.lock);
1164 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1167 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1170 /* End of "creation" */
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);
1176 pr_info("%s/alsa: %s registered as card %d\n",
1177 dev->name, card->longname, index[devnum]);
1179 if ((err = snd_card_register(card)) == 0) {
1180 snd_saa7134_cards[devnum] = card;
1185 snd_card_free(card);
1190 static int alsa_device_init(struct saa7134_dev *dev)
1192 dev->dmasound.priv_data = dev;
1193 alsa_card_saa7134_create(dev,dev->nr);
1197 static int alsa_device_exit(struct saa7134_dev *dev)
1199 if (!snd_saa7134_cards[dev->nr])
1202 snd_card_free(snd_saa7134_cards[dev->nr]);
1203 snd_saa7134_cards[dev->nr] = NULL;
1208 * Module initializer
1210 * Loops through present saa7134 cards, and assigns an ALSA device
1215 static int saa7134_alsa_init(void)
1217 struct saa7134_dev *dev;
1219 saa7134_dmasound_init = alsa_device_init;
1220 saa7134_dmasound_exit = alsa_device_exit;
1222 pr_info("saa7134 ALSA driver for DMA sound loaded\n");
1224 list_for_each_entry(dev, &saa7134_devlist, devlist) {
1225 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1226 pr_info("%s/alsa: %s doesn't support digital audio\n",
1227 dev->name, saa7134_boards[dev->board].name);
1229 alsa_device_init(dev);
1232 if (list_empty(&saa7134_devlist))
1233 pr_info("saa7134 ALSA: no saa7134 cards found\n");
1243 static void saa7134_alsa_exit(void)
1247 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1248 if (snd_saa7134_cards[idx])
1249 snd_card_free(snd_saa7134_cards[idx]);
1252 saa7134_dmasound_init = NULL;
1253 saa7134_dmasound_exit = NULL;
1254 pr_info("saa7134 ALSA driver for DMA sound unloaded\n");
1259 /* We initialize this late, to make sure the sound system is up and running */
1260 late_initcall(saa7134_alsa_init);
1261 module_exit(saa7134_alsa_exit);
1262 MODULE_LICENSE("GPL");
1263 MODULE_AUTHOR("Ricardo Cerqueira");