dmy.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:24k
- /* $Id: dmy.c,v 1.10 2001/10/08 22:19:50 davem Exp $
- * drivers/sbus/audio/dummy.c
- *
- * Copyright 1998 Derrick J Brashear (shadow@andrew.cmu.edu)
- *
- * This is a dummy lowlevel driver. Consider it a distant cousin of
- * /proc/audio; It pretends to be a piece of audio hardware, and writes
- * to a file instead. (or will shortly)
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/interrupt.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <linux/soundcard.h>
- #include <linux/delay.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/pgtable.h>
- #include <asm/sbus.h>
- #include <asm/audioio.h>
- #include "dummy.h"
- #define MAX_DRIVERS 1
- static struct sparcaudio_driver drivers[MAX_DRIVERS];
- static int num_drivers;
- static int dummy_play_gain(struct sparcaudio_driver *drv, int value,
- unsigned char balance);
- static int dummy_record_gain(struct sparcaudio_driver *drv, int value,
- unsigned char balance);
- static int dummy_output_muted(struct sparcaudio_driver *drv, int value);
- static int dummy_attach(struct sparcaudio_driver *drv) __init;
- static int
- dummy_set_output_encoding(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (value != 0) {
- dummy_chip->perchip_info.play.encoding = value;
- return 0;
- }
- return -EINVAL;
- }
- static int
- dummy_set_input_encoding(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (value != 0) {
- dummy_chip->perchip_info.record.encoding = value;
- return 0;
- }
- return -EINVAL;
- }
- static int dummy_get_output_encoding(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.encoding;
- }
- static int dummy_get_input_encoding(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.encoding;
- }
- static int
- dummy_set_output_rate(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (value != 0) {
- dummy_chip->perchip_info.play.sample_rate = value;
- return 0;
- }
- return -EINVAL;
- }
- static int
- dummy_set_input_rate(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (value != 0) {
- dummy_chip->perchip_info.record.sample_rate = value;
- return 0;
- }
- return -EINVAL;
- }
- static int dummy_get_output_rate(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.sample_rate;
- }
- static int dummy_get_input_rate(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.sample_rate;
- }
- /* Generically we support 4 channels. This does 2 */
- static int
- dummy_set_output_channels(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- switch (value) {
- case 1:
- case 2:
- break;
- default:
- return -(EINVAL);
- };
- dummy_chip->perchip_info.play.channels = value;
- return 0;
- }
- /* Generically we support 4 channels. This does 2 */
- static int
- dummy_set_input_channels(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- switch (value) {
- case 1:
- case 2:
- break;
- default:
- return -(EINVAL);
- };
- dummy_chip->perchip_info.record.channels = value;
- return 0;
- }
- static int dummy_get_input_channels(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.channels;
- }
- static int dummy_get_output_channels(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.channels;
- }
- static int dummy_get_output_precision(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.precision;
- }
- static int dummy_get_input_precision(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.precision;
- }
- static int dummy_set_output_precision(struct sparcaudio_driver *drv, int val)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.play.precision = val;
- return dummy_chip->perchip_info.play.precision;
- }
- static int dummy_set_input_precision(struct sparcaudio_driver *drv, int val)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.precision = val;
- return dummy_chip->perchip_info.record.precision;
- }
- /* Set output mute */
- static int dummy_output_muted(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (!value)
- dummy_chip->perchip_info.output_muted = 0;
- else
- dummy_chip->perchip_info.output_muted = 1;
- return 0;
- }
- static int dummy_get_output_muted(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.output_muted;
- }
- static int dummy_get_formats(struct sparcaudio_driver *drv)
- {
- return (AFMT_MU_LAW | AFMT_A_LAW |
- AFMT_U8 | AFMT_IMA_ADPCM |
- AFMT_S16_LE | AFMT_S16_BE);
- }
- static int dummy_get_output_ports(struct sparcaudio_driver *drv)
- {
- return (AUDIO_LINE_OUT | AUDIO_SPEAKER | AUDIO_HEADPHONE);
- }
- static int dummy_get_input_ports(struct sparcaudio_driver *drv)
- {
- return (AUDIO_ANALOG_LOOPBACK);
- }
- /* Set chip "output" port */
- static int dummy_set_output_port(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.play.port = value;
- return value;
- }
- static int dummy_set_input_port(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.port = value;
- return value;
- }
- static int dummy_get_output_port(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.port;
- }
- static int dummy_get_input_port(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.port;
- }
- static int dummy_get_output_error(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.play.error;
- }
- static int dummy_get_input_error(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.record.error;
- }
- static int dummy_get_output_samples(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.samples;
- }
- static int dummy_get_output_pause(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.play.pause;
- }
- static int dummy_set_output_volume(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_play_gain(drv, value, dummy_chip->perchip_info.play.balance);
- return 0;
- }
- static int dummy_get_output_volume(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.play.gain;
- }
- static int dummy_set_output_balance(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.play.balance = value;
- dummy_play_gain(drv, dummy_chip->perchip_info.play.gain,
- dummy_chip->perchip_info.play.balance);
- return 0;
- }
- static int dummy_get_output_balance(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.play.balance;
- }
- /* Set chip play gain */
- static int dummy_play_gain(struct sparcaudio_driver *drv,
- int value, unsigned char balance)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- int tmp = 0, r, l, r_adj, l_adj;
- r = l = value;
- if (balance < AUDIO_MID_BALANCE) {
- r = (int) (value -
- ((AUDIO_MID_BALANCE - balance) << AUDIO_BALANCE_SHIFT));
- if (r < 0)
- r = 0;
- } else if (balance > AUDIO_MID_BALANCE) {
- l = (int) (value -
- ((balance - AUDIO_MID_BALANCE) << AUDIO_BALANCE_SHIFT));
- if (l < 0)
- l = 0;
- }
- (l == 0) ? (l_adj = DUMMY_MAX_DEV_ATEN) : (l_adj = DUMMY_MAX_ATEN -
- (l * (DUMMY_MAX_ATEN + 1) /
- (AUDIO_MAX_GAIN + 1)));
- (r == 0) ? (r_adj = DUMMY_MAX_DEV_ATEN) : (r_adj = DUMMY_MAX_ATEN -
- (r * (DUMMY_MAX_ATEN + 1) /
- (AUDIO_MAX_GAIN + 1)));
- if ((value == 0) || (value == AUDIO_MAX_GAIN)) {
- tmp = value;
- } else {
- if (value == l) {
- tmp = ((DUMMY_MAX_ATEN - l_adj) * (AUDIO_MAX_GAIN + 1) /
- (DUMMY_MAX_ATEN + 1));
- } else if (value == r) {
- tmp = ((DUMMY_MAX_ATEN - r_adj) * (AUDIO_MAX_GAIN + 1) /
- (DUMMY_MAX_ATEN + 1));
- }
- }
- dummy_chip->perchip_info.play.gain = tmp;
- return 0;
- }
- static int dummy_get_input_samples(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.samples;
- }
- static int dummy_get_input_pause(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.record.pause;
- }
- static int dummy_set_monitor_volume(struct sparcaudio_driver *drv, int value)
- {
- return 0;
- }
- static int dummy_get_monitor_volume(struct sparcaudio_driver *drv)
- {
- return 0;
- }
- static int dummy_set_input_volume(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_record_gain(drv, value, dummy_chip->perchip_info.record.balance);
- return 0;
- }
- static int dummy_get_input_volume(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return dummy_chip->perchip_info.record.gain;
- }
- static int dummy_set_input_balance(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.balance = value;
- dummy_record_gain(drv, dummy_chip->perchip_info.record.gain,
- dummy_chip->perchip_info.play.balance);
- return 0;
- }
- static int dummy_get_input_balance(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- return (int) dummy_chip->perchip_info.record.balance;
- }
- static int dummy_record_gain(struct sparcaudio_driver *drv,
- int value, unsigned char balance)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- int tmp = 0, r, l, r_adj, l_adj;
- r = l = value;
- if (balance < AUDIO_MID_BALANCE) {
- r = (int) (value -
- ((AUDIO_MID_BALANCE - balance) << AUDIO_BALANCE_SHIFT));
- if (r < 0)
- r = 0;
- } else if (balance > AUDIO_MID_BALANCE) {
- l = (int) (value -
- ((balance - AUDIO_MID_BALANCE) << AUDIO_BALANCE_SHIFT));
- if (l < 0)
- l = 0;
- }
- (l == 0) ? (l_adj = DUMMY_MAX_DEV_ATEN) : (l_adj = DUMMY_MAX_ATEN -
- (l * (DUMMY_MAX_ATEN + 1) /
- (AUDIO_MAX_GAIN + 1)));
- (r == 0) ? (r_adj = DUMMY_MAX_DEV_ATEN) : (r_adj = DUMMY_MAX_ATEN -
- (r * (DUMMY_MAX_ATEN + 1) /
- (AUDIO_MAX_GAIN + 1)));
- if ((value == 0) || (value == AUDIO_MAX_GAIN)) {
- tmp = value;
- } else {
- if (value == l) {
- tmp = ((DUMMY_MAX_ATEN - l_adj) * (AUDIO_MAX_GAIN + 1) /
- (DUMMY_MAX_ATEN + 1));
- } else if (value == r) {
- tmp = ((DUMMY_MAX_ATEN - r_adj) * (AUDIO_MAX_GAIN + 1) /
- (DUMMY_MAX_ATEN + 1));
- }
- }
- dummy_chip->perchip_info.record.gain = tmp;
- return 0;
- }
- /* Reset the audio chip to a sane state. */
- static void dummy_chip_reset(struct sparcaudio_driver *drv)
- {
- dummy_set_output_encoding(drv, AUDIO_ENCODING_ULAW);
- dummy_set_output_rate(drv, DUMMY_RATE);
- dummy_set_output_channels(drv, DUMMY_CHANNELS);
- dummy_set_output_precision(drv, DUMMY_PRECISION);
- dummy_set_output_balance(drv, AUDIO_MID_BALANCE);
- dummy_set_output_volume(drv, DUMMY_DEFAULT_PLAYGAIN);
- dummy_set_output_port(drv, AUDIO_SPEAKER);
- dummy_output_muted(drv, 0);
- dummy_set_input_encoding(drv, AUDIO_ENCODING_ULAW);
- dummy_set_input_rate(drv, DUMMY_RATE);
- dummy_set_input_channels(drv, DUMMY_CHANNELS);
- dummy_set_input_precision(drv, DUMMY_PRECISION);
- dummy_set_input_balance(drv, AUDIO_MID_BALANCE);
- dummy_set_input_volume(drv, DUMMY_DEFAULT_PLAYGAIN);
- dummy_set_input_port(drv, AUDIO_SPEAKER);
- }
- static int dummy_open(struct inode * inode, struct file * file, struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- /* Set the default audio parameters if not already in use. */
- if (file->f_mode & FMODE_WRITE) {
- if (!(drv->flags & SDF_OPEN_WRITE) &&
- (dummy_chip->perchip_info.play.active == 0)) {
- dummy_chip->perchip_info.play.open = 1;
- dummy_chip->perchip_info.play.samples =
- dummy_chip->perchip_info.play.error = 0;
- }
- }
- if (file->f_mode & FMODE_READ) {
- if (!(drv->flags & SDF_OPEN_READ) &&
- (dummy_chip->perchip_info.record.active == 0)) {
- dummy_chip->perchip_info.record.open = 1;
- dummy_chip->perchip_info.record.samples =
- dummy_chip->perchip_info.record.error = 0;
- }
- }
- MOD_INC_USE_COUNT;
- return 0;
- }
- static void dummy_release(struct inode * inode, struct file * file, struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (file->f_mode & FMODE_WRITE) {
- dummy_chip->perchip_info.play.active =
- dummy_chip->perchip_info.play.open = 0;
- }
- if (file->f_mode & FMODE_READ) {
- dummy_chip->perchip_info.record.active =
- dummy_chip->perchip_info.record.open = 0;
- }
- MOD_DEC_USE_COUNT;
- }
- static void dummy_output_done_task(void * arg)
- {
- struct sparcaudio_driver *drv = (struct sparcaudio_driver *) arg;
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- sparcaudio_output_done(drv, 1);
- if (dummy_chip->perchip_info.record.active)
- sparcaudio_input_done(drv, 1);
- }
- static void dummy_start_output(struct sparcaudio_driver *drv, __u8 * buffer,
- unsigned long count)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- if (dummy_chip->perchip_info.play.pause || !count)
- return;
- dummy_chip->perchip_info.play.active = 1;
- /* fake an "interrupt" to deal with this block */
- INIT_LIST_HEAD(&dummy_chip->tqueue.list);
- dummy_chip->tqueue.sync = 0;
- dummy_chip->tqueue.routine = dummy_output_done_task;
- dummy_chip->tqueue.data = drv;
- queue_task(&dummy_chip->tqueue, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- }
- static void dummy_start_input(struct sparcaudio_driver *drv, __u8 * buffer,
- unsigned long count)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.active = 1;
- }
- static void dummy_stop_output(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.play.active = 0;
- }
- static void dummy_stop_input(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.active = 0;
- }
- static int dummy_set_output_pause(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.play.pause = value;
- if (!value)
- sparcaudio_output_done(drv, 0);
- return value;
- }
- static int dummy_set_input_pause(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- dummy_chip->perchip_info.record.pause = value;
- /* This should probably cause play pause. */
- return value;
- }
- static int dummy_set_input_error(struct sparcaudio_driver *drv, int value)
- {
- return 0;
- }
- static int dummy_set_output_error(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- int i;
- i = dummy_chip->perchip_info.play.error;
- dummy_chip->perchip_info.play.error = value;
- return i;
- }
- static int dummy_set_output_samples(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- int i;
- i = dummy_chip->perchip_info.play.samples;
- dummy_chip->perchip_info.play.samples = value;
- return i;
- }
- static int dummy_set_input_samples(struct sparcaudio_driver *drv, int value)
- {
- struct dummy_chip *dummy_chip = (struct dummy_chip *) drv->private;
- int i;
- i = dummy_chip->perchip_info.play.samples;
- dummy_chip->perchip_info.record.samples = value;
- return i;
- }
- /* In order to fake things which care out, play we're a 4231 */
- static void dummy_audio_getdev(struct sparcaudio_driver *drv,
- audio_device_t * audinfo)
- {
- strncpy(audinfo->name, "SUNW,cs4231", sizeof(audinfo->name) - 1);
- strncpy(audinfo->version, "a", sizeof(audinfo->version) - 1);
- strncpy(audinfo->config, "onboard1", sizeof(audinfo->config) - 1);
- }
- static int dummy_audio_getdev_sunos(struct sparcaudio_driver *drv)
- {
- return 5;
- }
- static struct sparcaudio_operations dummy_ops = {
- dummy_open,
- dummy_release,
- NULL,
- dummy_start_output,
- dummy_stop_output,
- dummy_start_input,
- dummy_stop_input,
- dummy_audio_getdev,
- dummy_set_output_volume,
- dummy_get_output_volume,
- dummy_set_input_volume,
- dummy_get_input_volume,
- dummy_set_monitor_volume,
- dummy_get_monitor_volume,
- dummy_set_output_balance,
- dummy_get_output_balance,
- dummy_set_input_balance,
- dummy_get_input_balance,
- dummy_set_output_channels,
- dummy_get_output_channels,
- dummy_set_input_channels,
- dummy_get_input_channels,
- dummy_set_output_precision,
- dummy_get_output_precision,
- dummy_set_input_precision,
- dummy_get_input_precision,
- dummy_set_output_port,
- dummy_get_output_port,
- dummy_set_input_port,
- dummy_get_input_port,
- dummy_set_output_encoding,
- dummy_get_output_encoding,
- dummy_set_input_encoding,
- dummy_get_input_encoding,
- dummy_set_output_rate,
- dummy_get_output_rate,
- dummy_set_input_rate,
- dummy_get_input_rate,
- dummy_audio_getdev_sunos,
- dummy_get_output_ports,
- dummy_get_input_ports,
- dummy_output_muted,
- dummy_get_output_muted,
- dummy_set_output_pause,
- dummy_get_output_pause,
- dummy_set_input_pause,
- dummy_get_input_pause,
- dummy_set_output_samples,
- dummy_get_output_samples,
- dummy_set_input_samples,
- dummy_get_input_samples,
- dummy_set_output_error,
- dummy_get_output_error,
- dummy_set_input_error,
- dummy_get_input_error,
- dummy_get_formats,
- };
- /* Attach to an dummy chip given its PROM node. */
- static int __init dummy_attach(struct sparcaudio_driver *drv)
- {
- struct dummy_chip *dummy_chip;
- int err;
- /* Allocate our private information structure. */
- drv->private = kmalloc(sizeof(struct dummy_chip), GFP_KERNEL);
- if (drv->private == NULL)
- return -ENOMEM;
- /* Point at the information structure and initialize it. */
- drv->ops = &dummy_ops;
- dummy_chip = (struct dummy_chip *) drv->private;
- /* Reset parameters. */
- dummy_chip_reset(drv);
- /* Register ourselves with the midlevel audio driver. */
- err = register_sparcaudio_driver(drv, 2);
- if (err < 0) {
- printk(KERN_ERR "dummy: unable to registern");
- kfree(drv->private);
- return -EIO;
- }
- dummy_chip->perchip_info.play.active =
- dummy_chip->perchip_info.play.pause = 0;
- dummy_chip->perchip_info.play.avail_ports = (AUDIO_HEADPHONE |
- AUDIO_SPEAKER |
- AUDIO_LINE_OUT);
- /* Announce the hardware to the user. */
- printk(KERN_INFO "audio%d: dummy at 0x0 irq 0n", drv->index);
-
- /* Success! */
- return 0;
- }
- /* Detach from an dummy chip given the device structure. */
- static void __exit dummy_detach(struct sparcaudio_driver *drv)
- {
- unregister_sparcaudio_driver(drv, 2);
- kfree(drv->private);
- }
- /* Probe for the dummy chip and then attach the driver. */
- static int __init dummy_init(void)
- {
- num_drivers = 0;
-
- /* Add support here for specifying multiple dummies to attach at once. */
- if (dummy_attach(&drivers[num_drivers]) == 0)
- num_drivers++;
-
- /* Only return success if we found some dummy chips. */
- return (num_drivers > 0) ? 0 : -EIO;
- }
- static void __exit dummy_exit(void)
- {
- int i;
- for (i = 0; i < num_drivers; i++) {
- dummy_detach(&drivers[i]);
- num_drivers--;
- }
- }
- module_init(dummy_init);
- module_exit(dummy_exit);
- MODULE_LICENSE("GPL");
- /*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 4
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -4
- * c-argdecl-indent: 4
- * c-label-offset: -4
- * c-continued-statement-offset: 4
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */