2 * SAA713x ALSA support for V4L
6 * - Volume doesn't work (it's always at max)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, version 2
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/wait.h>
27 #include <linux/moduleparam.h>
28 #include <linux/module.h>
29 #include <sound/driver.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/initval.h>
35 #include <linux/interrupt.h>
38 #include "saa7134-reg.h"
40 static unsigned int debug = 0;
41 module_param(debug, int, 0644);
42 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
45 * Configuration macros
49 #define MIXER_ADDR_TVTUNER 0
50 #define MIXER_ADDR_LINE1 1
51 #define MIXER_ADDR_LINE2 2
52 #define MIXER_ADDR_LAST 2
55 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
56 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
57 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
59 module_param_array(index, int, NULL, 0444);
60 module_param_array(enable, int, NULL, 0444);
61 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
62 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
64 #define dprintk(fmt, arg...) if (debug) \
65 printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
73 typedef struct snd_card_saa7134 {
74 struct snd_card *card;
75 spinlock_t mixer_lock;
76 int mixer_volume[MIXER_ADDR_LAST+1][2];
77 int capture_source[MIXER_ADDR_LAST+1][2];
79 struct saa7134_dev *dev;
93 typedef struct snd_card_saa7134_pcm {
94 struct saa7134_dev *dev;
98 struct snd_pcm_substream *substream;
99 } snd_card_saa7134_pcm_t;
101 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
105 * saa7134 DMA audio stop
107 * Called when the capture device is released or the buffer overflows
109 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
113 static void saa7134_dma_stop(struct saa7134_dev *dev)
115 dev->dmasound.dma_blk = -1;
116 dev->dmasound.dma_running = 0;
117 saa7134_set_dmabits(dev);
121 * saa7134 DMA audio start
123 * Called when preparing the capture device for use
125 * - Copied verbatim from saa7134-oss's dsp_dma_start.
129 static void saa7134_dma_start(struct saa7134_dev *dev)
131 dev->dmasound.dma_blk = 0;
132 dev->dmasound.dma_running = 1;
133 saa7134_set_dmabits(dev);
137 * saa7134 audio DMA IRQ handler
139 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
140 * Handles shifting between the 2 buffers, manages the read counters,
141 * and notifies ALSA when periods elapse
143 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
147 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
148 unsigned long status)
150 int next_blk, reg = 0;
152 spin_lock(&dev->slock);
153 if (UNSET == dev->dmasound.dma_blk) {
154 dprintk("irq: recording stopped\n");
157 if (0 != (status & 0x0f000000))
158 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
159 if (0 == (status & 0x10000000)) {
161 if (0 == (dev->dmasound.dma_blk & 0x01))
162 reg = SAA7134_RS_BA1(6);
165 if (1 == (dev->dmasound.dma_blk & 0x01))
166 reg = SAA7134_RS_BA2(6);
169 dprintk("irq: field oops [%s]\n",
170 (status & 0x10000000) ? "even" : "odd");
174 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
175 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
176 dev->dmasound.bufsize, dev->dmasound.blocks);
177 spin_unlock(&dev->slock);
178 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
182 /* next block addr */
183 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
184 saa_writel(reg,next_blk * dev->dmasound.blksize);
186 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
187 (status & 0x10000000) ? "even" : "odd ", next_blk,
188 next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
190 /* update status & wake waiting readers */
191 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
192 dev->dmasound.read_count += dev->dmasound.blksize;
194 dev->dmasound.recording_on = reg;
196 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
197 spin_unlock(&dev->slock);
198 snd_pcm_period_elapsed(dev->dmasound.substream);
199 spin_lock(&dev->slock);
203 spin_unlock(&dev->slock);
208 * IRQ request handler
210 * Runs along with saa7134's IRQ handler, discards anything that isn't
215 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
217 struct saa7134_dmasound *dmasound = dev_id;
218 struct saa7134_dev *dev = dmasound->priv_data;
220 unsigned long report, status;
221 int loop, handled = 0;
223 for (loop = 0; loop < 10; loop++) {
224 report = saa_readl(SAA7134_IRQ_REPORT);
225 status = saa_readl(SAA7134_IRQ_STATUS);
227 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
229 saa_writel(SAA7134_IRQ_REPORT,report);
230 saa7134_irq_alsa_done(dev, status);
237 dprintk("error! looping IRQ!");
241 return IRQ_RETVAL(handled);
245 * ALSA capture trigger
247 * - One of the ALSA capture callbacks.
249 * Called whenever a capture is started or stopped. Must be defined,
250 * but there's nothing we want to do here
254 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
257 struct snd_pcm_runtime *runtime = substream->runtime;
258 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
259 struct saa7134_dev *dev=pcm->dev;
262 spin_lock(&dev->slock);
263 if (cmd == SNDRV_PCM_TRIGGER_START) {
265 saa7134_dma_start(dev);
266 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
268 saa7134_dma_stop(dev);
272 spin_unlock(&dev->slock);
278 * DMA buffer initialization
280 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in
281 * ALSA, but I was unable to use ALSA's own DMA, and had to force the
284 * - Copied verbatim from saa7134-oss.
288 static int dsp_buffer_init(struct saa7134_dev *dev)
292 BUG_ON(!dev->dmasound.bufsize);
294 videobuf_dma_init(&dev->dmasound.dma);
295 err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
296 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
305 * Called after closing the device, during snd_card_saa7134_capture_close
309 static int dsp_buffer_free(struct saa7134_dev *dev)
311 if (!dev->dmasound.blksize)
314 videobuf_dma_free(&dev->dmasound.dma);
316 dev->dmasound.blocks = 0;
317 dev->dmasound.blksize = 0;
318 dev->dmasound.bufsize = 0;
325 * ALSA PCM preparation
327 * - One of the ALSA capture callbacks.
329 * Called right after the capture device is opened, this function configures
330 * the buffer using the previously defined functions, allocates the memory,
331 * sets up the hardware registers, and then starts the DMA. When this function
332 * returns, the audio should be flowing.
336 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
338 struct snd_pcm_runtime *runtime = substream->runtime;
341 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
342 struct saa7134_dev *dev;
343 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
345 pcm->dev->dmasound.substream = substream;
349 if (snd_pcm_format_width(runtime->format) == 8)
354 if (snd_pcm_format_signed(runtime->format))
359 if (snd_pcm_format_big_endian(runtime->format))
364 switch (dev->pci->device) {
365 case PCI_DEVICE_ID_PHILIPS_SAA7134:
366 if (1 == runtime->channels)
368 if (2 == runtime->channels)
373 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
374 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
375 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8);
376 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
377 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
380 case PCI_DEVICE_ID_PHILIPS_SAA7133:
381 case PCI_DEVICE_ID_PHILIPS_SAA7135:
382 if (1 == runtime->channels)
384 if (2 == runtime->channels)
388 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
389 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
393 dprintk("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
394 runtime->format, runtime->channels, fmt,
396 /* dma: setup channel 6 (= AUDIO) */
397 control = SAA7134_RS_CONTROL_BURST_16 |
398 SAA7134_RS_CONTROL_ME |
399 (dev->dmasound.pt.dma >> 12);
401 control |= SAA7134_RS_CONTROL_BSWAP;
403 saa_writel(SAA7134_RS_BA1(6),0);
404 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
405 saa_writel(SAA7134_RS_PITCH(6),0);
406 saa_writel(SAA7134_RS_CONTROL(6),control);
408 dev->dmasound.rate = runtime->rate;
415 * ALSA pointer fetching
417 * - One of the ALSA capture callbacks.
419 * Called whenever a period elapses, it must return the current hardware
420 * position of the buffer.
421 * Also resets the read counter used to prevent overruns
425 static snd_pcm_uframes_t
426 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
428 struct snd_pcm_runtime *runtime = substream->runtime;
429 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
430 struct saa7134_dev *dev=pcm->dev;
432 if (dev->dmasound.read_count) {
433 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
434 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
435 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
436 dev->dmasound.read_offset = 0;
439 return bytes_to_frames(runtime, dev->dmasound.read_offset);
443 * ALSA hardware capabilities definition
446 static struct snd_pcm_hardware snd_card_saa7134_capture =
448 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
449 SNDRV_PCM_INFO_BLOCK_TRANSFER |
450 SNDRV_PCM_INFO_MMAP_VALID),
451 .formats = SNDRV_PCM_FMTBIT_S16_LE | \
452 SNDRV_PCM_FMTBIT_S16_BE | \
453 SNDRV_PCM_FMTBIT_S8 | \
454 SNDRV_PCM_FMTBIT_U8 | \
455 SNDRV_PCM_FMTBIT_U16_LE | \
456 SNDRV_PCM_FMTBIT_U16_BE,
457 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
462 .buffer_bytes_max = (256*1024),
463 .period_bytes_min = 64,
464 .period_bytes_max = (256*1024),
469 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
471 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
478 * ALSA hardware params
480 * - One of the ALSA capture callbacks.
482 * Called on initialization, right before the PCM preparation
486 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
487 struct snd_pcm_hw_params * hw_params)
489 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
490 struct saa7134_dev *dev;
491 unsigned int period_size, periods;
494 period_size = params_period_bytes(hw_params);
495 periods = params_periods(hw_params);
497 snd_assert(period_size >= 0x100 && period_size <= 0x10000,
499 snd_assert(periods >= 2, return -EINVAL);
500 snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
504 if (dev->dmasound.blocks == periods &&
505 dev->dmasound.blksize == period_size)
508 /* release the old buffer */
509 if (substream->runtime->dma_area) {
510 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
511 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
512 dsp_buffer_free(dev);
513 substream->runtime->dma_area = NULL;
515 dev->dmasound.blocks = periods;
516 dev->dmasound.blksize = period_size;
517 dev->dmasound.bufsize = period_size * periods;
519 err = dsp_buffer_init(dev);
521 dev->dmasound.blocks = 0;
522 dev->dmasound.blksize = 0;
523 dev->dmasound.bufsize = 0;
527 if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
528 dsp_buffer_free(dev);
531 if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
532 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
533 dsp_buffer_free(dev);
536 if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
537 dev->dmasound.dma.sglist,
538 dev->dmasound.dma.sglen,
540 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
541 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
542 dsp_buffer_free(dev);
546 /* I should be able to use runtime->dma_addr in the control
547 byte, but it doesn't work. So I allocate the DMA using the
548 V4L functions, and force ALSA to use that as the DMA area */
550 substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
557 * ALSA hardware release
559 * - One of the ALSA capture callbacks.
561 * Called after closing the device, but before snd_card_saa7134_capture_close
562 * It stops the DMA audio and releases the buffers.
566 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
568 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
569 struct saa7134_dev *dev;
573 if (substream->runtime->dma_area) {
574 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
575 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
576 dsp_buffer_free(dev);
577 substream->runtime->dma_area = NULL;
584 * ALSA capture finish
586 * - One of the ALSA capture callbacks.
588 * Called after closing the device.
592 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
600 * - One of the ALSA capture callbacks.
602 * Called when opening the device. It creates and populates the PCM
607 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
609 struct snd_pcm_runtime *runtime = substream->runtime;
610 snd_card_saa7134_pcm_t *pcm;
611 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
612 struct saa7134_dev *dev = saa7134->dev;
615 down(&dev->dmasound.lock);
617 dev->dmasound.read_count = 0;
618 dev->dmasound.read_offset = 0;
620 up(&dev->dmasound.lock);
622 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
626 pcm->dev=saa7134->dev;
628 spin_lock_init(&pcm->lock);
630 pcm->substream = substream;
631 runtime->private_data = pcm;
632 runtime->private_free = snd_card_saa7134_runtime_free;
633 runtime->hw = snd_card_saa7134_capture;
635 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
642 * ALSA capture callbacks definition
645 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
646 .open = snd_card_saa7134_capture_open,
647 .close = snd_card_saa7134_capture_close,
648 .ioctl = snd_pcm_lib_ioctl,
649 .hw_params = snd_card_saa7134_hw_params,
650 .hw_free = snd_card_saa7134_hw_free,
651 .prepare = snd_card_saa7134_capture_prepare,
652 .trigger = snd_card_saa7134_capture_trigger,
653 .pointer = snd_card_saa7134_capture_pointer,
659 * Called when initializing the board. Sets up the name and hooks up
664 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
669 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
671 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
672 pcm->private_data = saa7134;
674 strcpy(pcm->name, "SAA7134 PCM");
678 #define SAA713x_VOLUME(xname, xindex, addr) \
679 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
680 .info = snd_saa7134_volume_info, \
681 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
682 .private_value = addr }
684 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
685 struct snd_ctl_elem_info * uinfo)
687 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
689 uinfo->value.integer.min = 0;
690 uinfo->value.integer.max = 20;
694 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
695 struct snd_ctl_elem_value * ucontrol)
697 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
698 int addr = kcontrol->private_value;
700 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
701 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
705 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
706 struct snd_ctl_elem_value * ucontrol)
708 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
709 int change, addr = kcontrol->private_value;
712 left = ucontrol->value.integer.value[0];
717 right = ucontrol->value.integer.value[1];
722 spin_lock_irq(&chip->mixer_lock);
723 change = chip->mixer_volume[addr][0] != left ||
724 chip->mixer_volume[addr][1] != right;
725 chip->mixer_volume[addr][0] = left;
726 chip->mixer_volume[addr][1] = right;
727 spin_unlock_irq(&chip->mixer_lock);
731 #define SAA713x_CAPSRC(xname, xindex, addr) \
732 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
733 .info = snd_saa7134_capsrc_info, \
734 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
735 .private_value = addr }
737 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
738 struct snd_ctl_elem_info * uinfo)
740 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
742 uinfo->value.integer.min = 0;
743 uinfo->value.integer.max = 1;
747 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
748 struct snd_ctl_elem_value * ucontrol)
750 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
751 int addr = kcontrol->private_value;
753 spin_lock_irq(&chip->mixer_lock);
754 ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
755 ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
756 spin_unlock_irq(&chip->mixer_lock);
761 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
762 struct snd_ctl_elem_value * ucontrol)
764 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
765 int change, addr = kcontrol->private_value;
769 struct saa7134_dev *dev;
773 left = ucontrol->value.integer.value[0] & 1;
774 right = ucontrol->value.integer.value[1] & 1;
775 spin_lock_irq(&chip->mixer_lock);
777 change = chip->capture_source[addr][0] != left ||
778 chip->capture_source[addr][1] != right;
779 chip->capture_source[addr][0] = left;
780 chip->capture_source[addr][1] = right;
781 dev->dmasound.input=addr;
782 spin_unlock_irq(&chip->mixer_lock);
786 switch (dev->pci->device) {
788 case PCI_DEVICE_ID_PHILIPS_SAA7134:
790 case MIXER_ADDR_TVTUNER:
791 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
792 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 0x03, 0x00);
794 case MIXER_ADDR_LINE1:
795 case MIXER_ADDR_LINE2:
796 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
797 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
798 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x08, analog_io);
799 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
800 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 0x03, rate);
805 case PCI_DEVICE_ID_PHILIPS_SAA7133:
806 case PCI_DEVICE_ID_PHILIPS_SAA7135:
807 xbarin = 0x03; // adc
810 case MIXER_ADDR_TVTUNER:
811 xbarin = 0; // Demodulator
814 case MIXER_ADDR_LINE1:
815 anabar = 0; // aux1, aux1
817 case MIXER_ADDR_LINE2:
818 anabar = 9; // aux2, aux2
822 /* output xbar always main channel */
823 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
825 if (left || right) { // We've got data, turn the input on
826 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
827 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
829 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
830 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
839 static struct snd_kcontrol_new snd_saa7134_controls[] = {
840 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
841 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
842 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
843 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
844 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
845 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
851 * Called when initializing the board. Sets up the name and hooks up
856 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
858 struct snd_card *card = chip->card;
862 snd_assert(chip != NULL, return -EINVAL);
863 strcpy(card->mixername, "SAA7134 Mixer");
865 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
866 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
872 static void snd_saa7134_free(struct snd_card * card)
874 snd_card_saa7134_t *chip = card->private_data;
876 if (chip->dev->dmasound.priv_data == NULL)
879 if (chip->irq >= 0) {
880 synchronize_irq(chip->irq);
881 free_irq(chip->irq, &chip->dev->dmasound);
884 chip->dev->dmasound.priv_data = NULL;
889 * ALSA initialization
891 * Called by the init routine, once for each saa7134 device present,
892 * it creates the basic structures and registers the ALSA devices
896 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
899 struct snd_card *card;
900 snd_card_saa7134_t *chip;
904 if (devnum >= SNDRV_CARDS)
909 card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
914 strcpy(card->driver, "SAA7134");
916 /* Card "creation" */
918 card->private_free = snd_saa7134_free;
919 chip = (snd_card_saa7134_t *) card->private_data;
921 spin_lock_init(&chip->lock);
922 spin_lock_init(&chip->mixer_lock);
928 chip->pci = dev->pci;
929 chip->iobase = pci_resource_start(dev->pci, 0);
932 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
933 SA_SHIRQ | SA_INTERRUPT, dev->name,
934 (void*) &dev->dmasound);
937 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
938 dev->name, dev->pci->irq);
942 chip->irq = dev->pci->irq;
944 init_MUTEX(&dev->dmasound.lock);
946 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
949 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
952 snd_card_set_dev(card, &chip->pci->dev);
954 /* End of "creation" */
956 strcpy(card->shortname, "SAA7134");
957 sprintf(card->longname, "%s at 0x%lx irq %d",
958 chip->dev->name, chip->iobase, chip->irq);
960 printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
962 if ((err = snd_card_register(card)) == 0) {
963 snd_saa7134_cards[devnum] = card;
973 static int alsa_device_init(struct saa7134_dev *dev)
975 dev->dmasound.priv_data = dev;
976 alsa_card_saa7134_create(dev,dev->nr);
980 static int alsa_device_exit(struct saa7134_dev *dev)
983 snd_card_free(snd_saa7134_cards[dev->nr]);
984 snd_saa7134_cards[dev->nr] = NULL;
991 * Loops through present saa7134 cards, and assigns an ALSA device
996 static int saa7134_alsa_init(void)
998 struct saa7134_dev *dev = NULL;
999 struct list_head *list;
1001 if (!dmasound_init && !dmasound_exit) {
1002 dmasound_init = alsa_device_init;
1003 dmasound_exit = alsa_device_exit;
1005 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1009 printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1011 list_for_each(list,&saa7134_devlist) {
1012 dev = list_entry(list, struct saa7134_dev, devlist);
1013 if (dev->dmasound.priv_data == NULL) {
1014 alsa_device_init(dev);
1016 printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1022 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1032 static void saa7134_alsa_exit(void)
1036 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1037 snd_card_free(snd_saa7134_cards[idx]);
1040 dmasound_init = NULL;
1041 dmasound_exit = NULL;
1042 printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1047 /* We initialize this late, to make sure the sound system is up and running */
1048 late_initcall(saa7134_alsa_init);
1049 module_exit(saa7134_alsa_exit);
1050 MODULE_LICENSE("GPL");
1051 MODULE_AUTHOR("Ricardo Cerqueira");