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)] = 0};
59 module_param_array(index, int, NULL, 0444);
60 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
62 #define dprintk(fmt, arg...) if (debug) \
63 printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
71 typedef struct snd_card_saa7134 {
73 spinlock_t mixer_lock;
74 int mixer_volume[MIXER_ADDR_LAST+1][2];
75 int capture_source[MIXER_ADDR_LAST+1][2];
77 struct saa7134_dev *dev;
91 typedef struct snd_card_saa7134_pcm {
92 struct saa7134_dev *dev;
96 snd_pcm_substream_t *substream;
97 } snd_card_saa7134_pcm_t;
99 static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
103 * saa7134 DMA audio stop
105 * Called when the capture device is released or the buffer overflows
107 * - Copied verbatim from saa7134-oss's dsp_dma_stop.
111 static void saa7134_dma_stop(struct saa7134_dev *dev)
113 dev->dmasound.dma_blk = -1;
114 dev->dmasound.dma_running = 0;
115 saa7134_set_dmabits(dev);
119 * saa7134 DMA audio start
121 * Called when preparing the capture device for use
123 * - Copied verbatim from saa7134-oss's dsp_dma_start.
127 static void saa7134_dma_start(struct saa7134_dev *dev)
129 dev->dmasound.dma_blk = 0;
130 dev->dmasound.dma_running = 1;
131 saa7134_set_dmabits(dev);
135 * saa7134 audio DMA IRQ handler
137 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
138 * Handles shifting between the 2 buffers, manages the read counters,
139 * and notifies ALSA when periods elapse
141 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
145 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
146 unsigned long status)
148 int next_blk, reg = 0;
150 spin_lock(&dev->slock);
151 if (UNSET == dev->dmasound.dma_blk) {
152 dprintk("irq: recording stopped\n");
155 if (0 != (status & 0x0f000000))
156 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
157 if (0 == (status & 0x10000000)) {
159 if (0 == (dev->dmasound.dma_blk & 0x01))
160 reg = SAA7134_RS_BA1(6);
163 if (1 == (dev->dmasound.dma_blk & 0x01))
164 reg = SAA7134_RS_BA2(6);
167 dprintk("irq: field oops [%s]\n",
168 (status & 0x10000000) ? "even" : "odd");
172 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
173 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
174 dev->dmasound.bufsize, dev->dmasound.blocks);
175 spin_unlock(&dev->slock);
176 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
180 /* next block addr */
181 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
182 saa_writel(reg,next_blk * dev->dmasound.blksize);
184 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
185 (status & 0x10000000) ? "even" : "odd ", next_blk,
186 next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
188 /* update status & wake waiting readers */
189 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
190 dev->dmasound.read_count += dev->dmasound.blksize;
192 dev->dmasound.recording_on = reg;
194 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
195 spin_unlock(&dev->slock);
196 snd_pcm_period_elapsed(dev->dmasound.substream);
197 spin_lock(&dev->slock);
201 spin_unlock(&dev->slock);
206 * IRQ request handler
208 * Runs along with saa7134's IRQ handler, discards anything that isn't
213 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
215 struct saa7134_dmasound *dmasound = dev_id;
216 struct saa7134_dev *dev = dmasound->priv_data;
218 unsigned long report, status;
219 int loop, handled = 0;
221 for (loop = 0; loop < 10; loop++) {
222 report = saa_readl(SAA7134_IRQ_REPORT);
223 status = saa_readl(SAA7134_IRQ_STATUS);
225 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
227 saa_writel(SAA7134_IRQ_REPORT,report);
228 saa7134_irq_alsa_done(dev, status);
235 dprintk("error! looping IRQ!");
239 return IRQ_RETVAL(handled);
243 * ALSA capture trigger
245 * - One of the ALSA capture callbacks.
247 * Called whenever a capture is started or stopped. Must be defined,
248 * but there's nothing we want to do here
252 static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
255 snd_pcm_runtime_t *runtime = substream->runtime;
256 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
257 struct saa7134_dev *dev=pcm->dev;
260 spin_lock(&dev->slock);
261 if (cmd == SNDRV_PCM_TRIGGER_START) {
263 saa7134_dma_start(dev);
264 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
266 saa7134_dma_stop(dev);
270 spin_unlock(&dev->slock);
276 * DMA buffer initialization
278 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in
279 * ALSA, but I was unable to use ALSA's own DMA, and had to force the
282 * - Copied verbatim from saa7134-oss.
286 static int dsp_buffer_init(struct saa7134_dev *dev)
290 BUG_ON(!dev->dmasound.bufsize);
292 videobuf_dma_init(&dev->dmasound.dma);
293 err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
294 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
303 * Called after closing the device, during snd_card_saa7134_capture_close
307 static int dsp_buffer_free(struct saa7134_dev *dev)
309 if (!dev->dmasound.blksize)
312 videobuf_dma_free(&dev->dmasound.dma);
314 dev->dmasound.blocks = 0;
315 dev->dmasound.blksize = 0;
316 dev->dmasound.bufsize = 0;
323 * ALSA PCM preparation
325 * - One of the ALSA capture callbacks.
327 * Called right after the capture device is opened, this function configures
328 * the buffer using the previously defined functions, allocates the memory,
329 * sets up the hardware registers, and then starts the DMA. When this function
330 * returns, the audio should be flowing.
334 static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
336 snd_pcm_runtime_t *runtime = substream->runtime;
339 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
340 struct saa7134_dev *dev;
341 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
343 pcm->dev->dmasound.substream = substream;
347 if (snd_pcm_format_width(runtime->format) == 8)
352 if (snd_pcm_format_signed(runtime->format))
357 if (snd_pcm_format_big_endian(runtime->format))
362 switch (dev->pci->device) {
363 case PCI_DEVICE_ID_PHILIPS_SAA7134:
364 if (1 == runtime->channels)
366 if (2 == runtime->channels)
371 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
372 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
373 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8);
374 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
375 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
378 case PCI_DEVICE_ID_PHILIPS_SAA7133:
379 case PCI_DEVICE_ID_PHILIPS_SAA7135:
380 if (1 == runtime->channels)
382 if (2 == runtime->channels)
386 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
387 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
391 dprintk("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n",
392 runtime->format, runtime->channels, fmt,
394 /* dma: setup channel 6 (= AUDIO) */
395 control = SAA7134_RS_CONTROL_BURST_16 |
396 SAA7134_RS_CONTROL_ME |
397 (dev->dmasound.pt.dma >> 12);
399 control |= SAA7134_RS_CONTROL_BSWAP;
401 saa_writel(SAA7134_RS_BA1(6),0);
402 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
403 saa_writel(SAA7134_RS_PITCH(6),0);
404 saa_writel(SAA7134_RS_CONTROL(6),control);
406 dev->dmasound.rate = runtime->rate;
413 * ALSA pointer fetching
415 * - One of the ALSA capture callbacks.
417 * Called whenever a period elapses, it must return the current hardware
418 * position of the buffer.
419 * Also resets the read counter used to prevent overruns
423 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
425 snd_pcm_runtime_t *runtime = substream->runtime;
426 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
427 struct saa7134_dev *dev=pcm->dev;
429 if (dev->dmasound.read_count) {
430 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
431 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
432 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
433 dev->dmasound.read_offset = 0;
436 return bytes_to_frames(runtime, dev->dmasound.read_offset);
440 * ALSA hardware capabilities definition
443 static snd_pcm_hardware_t snd_card_saa7134_capture =
445 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
446 SNDRV_PCM_INFO_BLOCK_TRANSFER |
447 SNDRV_PCM_INFO_MMAP_VALID),
448 .formats = SNDRV_PCM_FMTBIT_S16_LE | \
449 SNDRV_PCM_FMTBIT_S16_BE | \
450 SNDRV_PCM_FMTBIT_S8 | \
451 SNDRV_PCM_FMTBIT_U8 | \
452 SNDRV_PCM_FMTBIT_U16_LE | \
453 SNDRV_PCM_FMTBIT_U16_BE,
454 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
459 .buffer_bytes_max = (256*1024),
460 .period_bytes_min = 64,
461 .period_bytes_max = (256*1024),
466 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
468 snd_card_saa7134_pcm_t *pcm = runtime->private_data;
475 * ALSA hardware params
477 * - One of the ALSA capture callbacks.
479 * Called on initialization, right before the PCM preparation
483 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
484 snd_pcm_hw_params_t * hw_params)
486 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
487 struct saa7134_dev *dev;
488 unsigned int period_size, periods;
491 period_size = params_period_bytes(hw_params);
492 periods = params_periods(hw_params);
494 snd_assert(period_size >= 0x100 && period_size <= 0x10000,
496 snd_assert(periods >= 2, return -EINVAL);
497 snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
501 if (dev->dmasound.blocks == periods &&
502 dev->dmasound.blksize == period_size)
505 /* release the old buffer */
506 if (substream->runtime->dma_area) {
507 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
508 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
509 dsp_buffer_free(dev);
510 substream->runtime->dma_area = NULL;
512 dev->dmasound.blocks = periods;
513 dev->dmasound.blksize = period_size;
514 dev->dmasound.bufsize = period_size * periods;
516 err = dsp_buffer_init(dev);
518 dev->dmasound.blocks = 0;
519 dev->dmasound.blksize = 0;
520 dev->dmasound.bufsize = 0;
524 if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
525 dsp_buffer_free(dev);
528 if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
529 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
530 dsp_buffer_free(dev);
533 if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
534 dev->dmasound.dma.sglist,
535 dev->dmasound.dma.sglen,
537 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
538 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
539 dsp_buffer_free(dev);
543 /* I should be able to use runtime->dma_addr in the control
544 byte, but it doesn't work. So I allocate the DMA using the
545 V4L functions, and force ALSA to use that as the DMA area */
547 substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
554 * ALSA hardware release
556 * - One of the ALSA capture callbacks.
558 * Called after closing the device, but before snd_card_saa7134_capture_close
559 * It stops the DMA audio and releases the buffers.
563 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
565 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
566 struct saa7134_dev *dev;
570 if (substream->runtime->dma_area) {
571 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
572 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
573 dsp_buffer_free(dev);
574 substream->runtime->dma_area = NULL;
581 * ALSA capture finish
583 * - One of the ALSA capture callbacks.
585 * Called after closing the device.
589 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
597 * - One of the ALSA capture callbacks.
599 * Called when opening the device. It creates and populates the PCM
604 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
606 snd_pcm_runtime_t *runtime = substream->runtime;
607 snd_card_saa7134_pcm_t *pcm;
608 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
609 struct saa7134_dev *dev = saa7134->dev;
612 mutex_lock(&dev->dmasound.lock);
614 dev->dmasound.read_count = 0;
615 dev->dmasound.read_offset = 0;
617 mutex_unlock(&dev->dmasound.lock);
619 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
623 pcm->dev=saa7134->dev;
625 spin_lock_init(&pcm->lock);
627 pcm->substream = substream;
628 runtime->private_data = pcm;
629 runtime->private_free = snd_card_saa7134_runtime_free;
630 runtime->hw = snd_card_saa7134_capture;
632 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
639 * ALSA capture callbacks definition
642 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
643 .open = snd_card_saa7134_capture_open,
644 .close = snd_card_saa7134_capture_close,
645 .ioctl = snd_pcm_lib_ioctl,
646 .hw_params = snd_card_saa7134_hw_params,
647 .hw_free = snd_card_saa7134_hw_free,
648 .prepare = snd_card_saa7134_capture_prepare,
649 .trigger = snd_card_saa7134_capture_trigger,
650 .pointer = snd_card_saa7134_capture_pointer,
656 * Called when initializing the board. Sets up the name and hooks up
661 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
666 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
668 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
669 pcm->private_data = saa7134;
671 strcpy(pcm->name, "SAA7134 PCM");
675 #define SAA713x_VOLUME(xname, xindex, addr) \
676 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
677 .info = snd_saa7134_volume_info, \
678 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
679 .private_value = addr }
681 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
683 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
685 uinfo->value.integer.min = 0;
686 uinfo->value.integer.max = 20;
690 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
692 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
693 int addr = kcontrol->private_value;
695 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
696 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
700 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
702 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
703 int change, addr = kcontrol->private_value;
706 left = ucontrol->value.integer.value[0];
711 right = ucontrol->value.integer.value[1];
716 spin_lock_irq(&chip->mixer_lock);
717 change = chip->mixer_volume[addr][0] != left ||
718 chip->mixer_volume[addr][1] != right;
719 chip->mixer_volume[addr][0] = left;
720 chip->mixer_volume[addr][1] = right;
721 spin_unlock_irq(&chip->mixer_lock);
725 #define SAA713x_CAPSRC(xname, xindex, addr) \
726 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
727 .info = snd_saa7134_capsrc_info, \
728 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
729 .private_value = addr }
731 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
733 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
735 uinfo->value.integer.min = 0;
736 uinfo->value.integer.max = 1;
740 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
742 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
743 int addr = kcontrol->private_value;
745 spin_lock_irq(&chip->mixer_lock);
746 ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
747 ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
748 spin_unlock_irq(&chip->mixer_lock);
753 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
755 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
756 int change, addr = kcontrol->private_value;
760 struct saa7134_dev *dev;
764 left = ucontrol->value.integer.value[0] & 1;
765 right = ucontrol->value.integer.value[1] & 1;
766 spin_lock_irq(&chip->mixer_lock);
768 change = chip->capture_source[addr][0] != left ||
769 chip->capture_source[addr][1] != right;
770 chip->capture_source[addr][0] = left;
771 chip->capture_source[addr][1] = right;
772 dev->dmasound.input=addr;
773 spin_unlock_irq(&chip->mixer_lock);
777 switch (dev->pci->device) {
779 case PCI_DEVICE_ID_PHILIPS_SAA7134:
781 case MIXER_ADDR_TVTUNER:
782 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
783 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 0x03, 0x00);
785 case MIXER_ADDR_LINE1:
786 case MIXER_ADDR_LINE2:
787 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
788 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
789 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x08, analog_io);
790 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
791 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 0x03, rate);
796 case PCI_DEVICE_ID_PHILIPS_SAA7133:
797 case PCI_DEVICE_ID_PHILIPS_SAA7135:
798 xbarin = 0x03; // adc
801 case MIXER_ADDR_TVTUNER:
802 xbarin = 0; // Demodulator
805 case MIXER_ADDR_LINE1:
806 anabar = 0; // aux1, aux1
808 case MIXER_ADDR_LINE2:
809 anabar = 9; // aux2, aux2
813 /* output xbar always main channel */
814 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
816 if (left || right) { // We've got data, turn the input on
817 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
818 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
820 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
821 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
830 static snd_kcontrol_new_t snd_saa7134_controls[] = {
831 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
832 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
833 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
834 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
835 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
836 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
842 * Called when initializing the board. Sets up the name and hooks up
847 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
849 snd_card_t *card = chip->card;
853 snd_assert(chip != NULL, return -EINVAL);
854 strcpy(card->mixername, "SAA7134 Mixer");
856 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
857 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
863 static void snd_saa7134_free(snd_card_t * card)
865 snd_card_saa7134_t *chip = card->private_data;
867 if (chip->dev->dmasound.priv_data == NULL)
870 if (chip->irq >= 0) {
871 synchronize_irq(chip->irq);
872 free_irq(chip->irq, &chip->dev->dmasound);
875 chip->dev->dmasound.priv_data = NULL;
880 * ALSA initialization
882 * Called by the init routine, once for each saa7134 device present,
883 * it creates the basic structures and registers the ALSA devices
887 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
891 snd_card_saa7134_t *chip;
895 if (devnum >= SNDRV_CARDS)
900 card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
905 strcpy(card->driver, "SAA7134");
907 /* Card "creation" */
909 card->private_free = snd_saa7134_free;
910 chip = (snd_card_saa7134_t *) card->private_data;
912 spin_lock_init(&chip->lock);
913 spin_lock_init(&chip->mixer_lock);
919 chip->pci = dev->pci;
920 chip->iobase = pci_resource_start(dev->pci, 0);
923 err = request_irq(dev->pci->irq, saa7134_alsa_irq,
924 SA_SHIRQ | SA_INTERRUPT, dev->name,
925 (void*) &dev->dmasound);
928 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
929 dev->name, dev->pci->irq);
933 chip->irq = dev->pci->irq;
935 mutex_init(&dev->dmasound.lock);
937 if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
940 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
943 snd_card_set_dev(card, &chip->pci->dev);
945 /* End of "creation" */
947 strcpy(card->shortname, "SAA7134");
948 sprintf(card->longname, "%s at 0x%lx irq %d",
949 chip->dev->name, chip->iobase, chip->irq);
951 printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
953 if ((err = snd_card_register(card)) == 0) {
954 snd_saa7134_cards[devnum] = card;
964 static int alsa_device_init(struct saa7134_dev *dev)
966 dev->dmasound.priv_data = dev;
967 alsa_card_saa7134_create(dev,dev->nr);
971 static int alsa_device_exit(struct saa7134_dev *dev)
974 snd_card_free(snd_saa7134_cards[dev->nr]);
975 snd_saa7134_cards[dev->nr] = NULL;
982 * Loops through present saa7134 cards, and assigns an ALSA device
987 static int saa7134_alsa_init(void)
989 struct saa7134_dev *dev = NULL;
990 struct list_head *list;
992 if (!dmasound_init && !dmasound_exit) {
993 dmasound_init = alsa_device_init;
994 dmasound_exit = alsa_device_exit;
996 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1000 printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1002 list_for_each(list,&saa7134_devlist) {
1003 dev = list_entry(list, struct saa7134_dev, devlist);
1004 if (dev->dmasound.priv_data == NULL) {
1005 alsa_device_init(dev);
1007 printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1013 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1023 static void saa7134_alsa_exit(void)
1027 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1028 snd_card_free(snd_saa7134_cards[idx]);
1031 dmasound_init = NULL;
1032 dmasound_exit = NULL;
1033 printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1038 /* We initialize this late, to make sure the sound system is up and running */
1039 late_initcall(saa7134_alsa_init);
1040 module_exit(saa7134_alsa_exit);
1041 MODULE_LICENSE("GPL");
1042 MODULE_AUTHOR("Ricardo Cerqueira");