- 根目录:
- sound
- pci
- aw2
- aw2-alsa.c
/*****************************************************************************
*
* Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
* Jean-Christian Hassler <jhassler@free.fr>
*
* This file is part of the Audiowerk2 ALSA driver
*
* The Audiowerk2 ALSA driver is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2.
*
* The Audiowerk2 ALSA driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Audiowerk2 ALSA driver; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*****************************************************************************/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include "saa7146.h"
#include "aw2-saa7146.h"
MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
"Jean-Christian Hassler <jhassler@free.fr>");
MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
MODULE_LICENSE("GPL");
/*********************************
* DEFINES
********************************/
#define CTL_ROUTE_ANALOG 0
#define CTL_ROUTE_DIGITAL 1
/*********************************
* TYPEDEFS
********************************/
/* hardware definition */
static struct snd_pcm_hardware snd_aw2_playback_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_44100,
.rate_min = 44100,
.rate_max = 44100,
.channels_min = 2,
.channels_max = 4,
.buffer_bytes_max = 32768,
.period_bytes_min = 4096,
.period_bytes_max = 32768,
.periods_min = 1,
.periods_max = 1024,
};
static struct snd_pcm_hardware snd_aw2_capture_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_44100,
.rate_min = 44100,
.rate_max = 44100,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 32768,
.period_bytes_min = 4096,
.period_bytes_max = 32768,
.periods_min = 1,
.periods_max = 1024,
};
struct aw2_pcm_device {
struct snd_pcm *pcm;
unsigned int stream_number;
struct aw2 *chip;
};
struct aw2 {
struct snd_aw2_saa7146 saa7146;
struct pci_dev *pci;
int irq;
spinlock_t reg_lock;
struct mutex mtx;
unsigned long iobase_phys;
void __iomem *iobase_virt;
struct snd_card *card;
struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
};
/*********************************
* FUNCTION DECLARATIONS
********************************/
static int snd_aw2_dev_free(struct snd_device *device);
static int snd_aw2_create(struct snd_card *card,
struct pci_dev *pci, struct aw2 **rchip);
static int snd_aw2_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id);
static void snd_aw2_remove(struct pci_dev *pci);
static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params);
static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
int cmd);
static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
int cmd);
static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
*substream);
static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
*substream);
static int snd_aw2_new_pcm(struct aw2 *chip);
static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol);
static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol);
/*********************************
* VARIABLES
********************************/
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
static DEFINE_PCI_DEVICE_TABLE(snd_aw2_ids) = {
{PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
0, 0, 0},
{0}
};
MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
/* pci_driver definition */
static struct pci_driver aw2_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_aw2_ids,
.probe = snd_aw2_probe,
.remove = snd_aw2_remove,
};
module_pci_driver(aw2_driver);
/* operators for playback PCM alsa interface */
static struct snd_pcm_ops snd_aw2_playback_ops = {
.open = snd_aw2_pcm_playback_open,
.close = snd_aw2_pcm_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_aw2_pcm_hw_params,
.hw_free = snd_aw2_pcm_hw_free,
.prepare = snd_aw2_pcm_prepare_playback,
.trigger = snd_aw2_pcm_trigger_playback,
.pointer = snd_aw2_pcm_pointer_playback,
};
/* operators for capture PCM alsa interface */
static struct snd_pcm_ops snd_aw2_capture_ops = {
.open = snd_aw2_pcm_capture_open,
.close = snd_aw2_pcm_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_aw2_pcm_hw_params,
.hw_free = snd_aw2_pcm_hw_free,
.prepare = snd_aw2_pcm_prepare_capture,
.trigger = snd_aw2_pcm_trigger_capture,
.pointer = snd_aw2_pcm_pointer_capture,
};
static struct snd_kcontrol_new aw2_control = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Capture Route",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 0xffff,
.info = snd_aw2_control_switch_capture_info,
.get = snd_aw2_control_switch_capture_get,
.put = snd_aw2_control_switch_capture_put
};
/*********************************
* FUNCTION IMPLEMENTATIONS
********************************/
/* component-destructor */
static int snd_aw2_dev_free(struct snd_device *device)
{
struct aw2 *chip = device->device_data;
/* Free hardware */
snd_aw2_saa7146_free(&chip->saa7146);
/* release the irq */
if (chip->irq >= 0)
free_irq(chip->irq, (void *)chip);
/* release the i/o ports & memory */
if (chip->iobase_virt)
iounmap(chip->iobase_virt);
pci_release_regions(chip->pci);
/* disable the PCI entry */
pci_disable_device(chip->pci);
/* release the data */
kfree(chip);
return 0;
}
/* chip-specific constructor */
static int snd_aw2_create(struct snd_card *card,
struct pci_dev *pci, struct aw2 **rchip)
{
struct aw2 *chip;
int err;
static struct snd_device_ops ops = {
.dev_free = snd_aw2_dev_free,
};
*rchip = NULL;
/* initialize the PCI entry */
err = pci_enable_device(pci);
if (err < 0)
return err;
pci_set_master(pci);
/* check PCI availability (32bit DMA) */
if ((pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0) ||
(pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0)) {
printk(KERN_ERR "aw2: Impossible to set 32bit mask DMA\n");
pci_disable_device(pci);
return -ENXIO;
}
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL) {
pci_disable_device(pci);
return -ENOMEM;
}
/* initialize the stuff */
chip->card = card;
chip->pci = pci;
chip->irq = -1;
/* (1) PCI resource allocation */
err = pci_request_regions(pci, "Audiowerk2");
if (err < 0) {
pci_disable_device(pci);
kfree(chip);
return err;
}
chip->iobase_phys = pci_resource_start(pci, 0);
chip->iobase_virt =
ioremap_nocache(chip->iobase_phys,
pci_resource_len(pci, 0));
if (chip->iobase_virt == NULL) {
printk(KERN_ERR "aw2: unable to remap memory region");
pci_release_regions(pci);
pci_disable_device(pci);
kfree(chip);
return -ENOMEM;
}
/* (2) initialization of the chip hardware */
snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
if (request_irq(pci->irq, snd_aw2_saa7146_interrupt,
IRQF_SHARED, KBUILD_MODNAME, chip)) {
printk(KERN_ERR "aw2: Cannot grab irq %d\n", pci->irq);
iounmap(chip->iobase_virt);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
return -EBUSY;
}
chip->irq = pci->irq;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0) {
free_irq(chip->irq, (void *)chip);
iounmap(chip->iobase_virt);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
return err;
}
snd_card_set_dev(card, &pci->dev);
*rchip = chip;
printk(KERN_INFO
"Audiowerk 2 sound card (saa7146 chipset) detected and "
"managed\n");
return 0;
}
/* constructor */
static int snd_aw2_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct aw2 *chip;
int err;
/* (1) Continue if device is not enabled, else inc dev */
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
/* (2) Create card instance */
err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
if (err < 0)
return err;
/* (3) Create main component */
err = snd_aw2_create(card, pci, &chip);
if (err < 0) {
snd_card_free(card);
return err;
}
/* initialize mutex */
mutex_init(&chip->mtx);
/* init spinlock */
spin_lock_init(&chip->reg_lock);
/* (4) Define driver ID and name string */
strcpy(card->driver, "aw2");
strcpy(card->shortname, "Audiowerk2");
sprintf(card->longname, "%s with SAA7146 irq %i",
card->shortname, chip->irq);
/* (5) Create other components */
snd_aw2_new_pcm(chip);
/* (6) Register card instance */
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return err;
}
/* (7) Set PCI driver data */
pci_set_drvdata(pci, card);
dev++;
return 0;
}
/* destructor */
static void snd_aw2_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
/* open callback */
static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_printdd(KERN_DEBUG "aw2: Playback_open\n");
runtime->hw = snd_aw2_playback_hw;
return 0;
}
/* close callback */
static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
{
return 0;
}
static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_printdd(KERN_DEBUG "aw2: Capture_open\n");
runtime->hw = snd_aw2_capture_hw;
return 0;
}
/* close callback */
static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
{
/* TODO: something to do ? */
return 0;
}
/* hw_params callback */
static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}
/* hw_free callback */
static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
/* prepare callback for playback */
static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long period_size, buffer_size;
mutex_lock(&chip->mtx);
period_size = snd_pcm_lib_period_bytes(substream);
buffer_size = snd_pcm_lib_buffer_bytes(substream);
snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_addr, period_size,
buffer_size);
/* Define Interrupt callback */
snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
(snd_aw2_saa7146_it_cb)
snd_pcm_period_elapsed,
(void *)substream);
mutex_unlock(&chip->mtx);
return 0;
}
/* prepare callback for capture */
static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long period_size, buffer_size;
mutex_lock(&chip->mtx);
period_size = snd_pcm_lib_period_bytes(substream);
buffer_size = snd_pcm_lib_buffer_bytes(substream);
snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_addr, period_size,
buffer_size);
/* Define Interrupt callback */
snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
(snd_aw2_saa7146_it_cb)
snd_pcm_period_elapsed,
(void *)substream);
mutex_unlock(&chip->mtx);
return 0;
}
/* playback trigger callback */
static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
int cmd)
{
int status = 0;
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
pcm_device->
stream_number);
break;
case SNDRV_PCM_TRIGGER_STOP:
snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
pcm_device->
stream_number);
break;
default:
status = -EINVAL;
}
spin_unlock(&chip->reg_lock);
return status;
}
/* capture trigger callback */
static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
int cmd)
{
int status = 0;
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
pcm_device->
stream_number);
break;
case SNDRV_PCM_TRIGGER_STOP:
snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
pcm_device->
stream_number);
break;
default:
status = -EINVAL;
}
spin_unlock(&chip->reg_lock);
return status;
}
/* playback pointer callback */
static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
*substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
unsigned int current_ptr;
/* get the current hardware pointer */
struct snd_pcm_runtime *runtime = substream->runtime;
current_ptr =
snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_area,
runtime->buffer_size);
return bytes_to_frames(substream->runtime, current_ptr);
}
/* capture pointer callback */
static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
*substream)
{
struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
struct aw2 *chip = pcm_device->chip;
unsigned int current_ptr;
/* get the current hardware pointer */
struct snd_pcm_runtime *runtime = substream->runtime;
current_ptr =
snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
pcm_device->stream_number,
runtime->dma_area,
runtime->buffer_size);
return bytes_to_frames(substream->runtime, current_ptr);
}
/* create a pcm device */
static int snd_aw2_new_pcm(struct aw2 *chip)
{
struct snd_pcm *pcm_playback_ana;
struct snd_pcm *pcm_playback_num;
struct snd_pcm *pcm_capture;
struct aw2_pcm_device *pcm_device;
int err = 0;
/* Create new Alsa PCM device */
err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
&pcm_playback_ana);
if (err < 0) {
printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
/* Set PCM device name */
strcpy(pcm_playback_ana->name, "Analog playback");
/* Associate private data to PCM device */
pcm_playback_ana->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
&snd_aw2_playback_ops);
/* store PCM device */
pcm_device->pcm = pcm_playback_ana;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_ana,
SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data
(chip->pci),
64 * 1024, 64 * 1024);
if (err)
printk(KERN_ERR "aw2: snd_pcm_lib_preallocate_pages_for_all "
"error (0x%X)\n", err);
err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
&pcm_playback_num);
if (err < 0) {
printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
/* Set PCM device name */
strcpy(pcm_playback_num->name, "Digital playback");
/* Associate private data to PCM device */
pcm_playback_num->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
&snd_aw2_playback_ops);
/* store PCM device */
pcm_device->pcm = pcm_playback_num;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_num,
SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data
(chip->pci),
64 * 1024, 64 * 1024);
if (err)
printk(KERN_ERR
"aw2: snd_pcm_lib_preallocate_pages_for_all error "
"(0x%X)\n", err);
err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
&pcm_capture);
if (err < 0) {
printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
return err;
}
/* Creation ok */
pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
/* Set PCM device name */
strcpy(pcm_capture->name, "Capture");
/* Associate private data to PCM device */
pcm_capture->private_data = pcm_device;
/* set operators of PCM device */
snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
&snd_aw2_capture_ops);
/* store PCM device */
pcm_device->pcm = pcm_capture;
/* give base chip pointer to our internal pcm device
structure */
pcm_device->chip = chip;
/* Give stream number to PCM device */
pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
/* pre-allocation of buffers */
/* Preallocate continuous pages. */
err = snd_pcm_lib_preallocate_pages_for_all(pcm_capture,
SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data
(chip->pci),
64 * 1024, 64 * 1024);
if (err)
printk(KERN_ERR
"aw2: snd_pcm_lib_preallocate_pages_for_all error "
"(0x%X)\n", err);
/* Create control */
err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
if (err < 0) {
printk(KERN_ERR "aw2: snd_ctl_add error (0x%X)\n", err);
return err;
}
return 0;
}
static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static char *texts[2] = {
"Analog", "Digital"
};
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = 2;
if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items) {
uinfo->value.enumerated.item =
uinfo->value.enumerated.items - 1;
}
strcpy(uinfo->value.enumerated.name,
texts[uinfo->value.enumerated.item]);
return 0;
}
static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol)
{
struct aw2 *chip = snd_kcontrol_chip(kcontrol);
if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
else
ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
return 0;
}
static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value
*ucontrol)
{
struct aw2 *chip = snd_kcontrol_chip(kcontrol);
int changed = 0;
int is_disgital =
snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
&& !is_disgital)
|| ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
&& is_disgital)) {
snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
changed = 1;
}
return changed;
}