| /* |
| * Dummy soundcard |
| * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| * |
| * This program 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; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <sound/driver.h> |
| #include <linux/init.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <linux/wait.h> |
| #include <sound/core.h> |
| #include <sound/control.h> |
| #include <sound/pcm.h> |
| #include <sound/rawmidi.h> |
| #define SNDRV_GET_ID |
| #include <sound/initval.h> |
| |
| EXPORT_NO_SYMBOLS; |
| |
| MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); |
| MODULE_LICENSE("GPL"); |
| MODULE_CLASSES("{sound}"); |
| MODULE_DEVICES("{{ALSA,Dummy soundcard}}"); |
| |
| #define MAX_PCM_DEVICES 4 |
| #define MAX_PCM_SUBSTREAMS 16 |
| #define MAX_MIDI_DEVICES 2 |
| |
| #if 0 /* RME9652 emulation */ |
| #define MAX_BUFFER_SIZE (26 * 64 * 1024) |
| #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE |
| #define USE_CHANNELS_MIN 26 |
| #define USE_CHANNELS_MAX 26 |
| #define USE_PERIODS_MIN 2 |
| #define USE_PERIODS_MAX 2 |
| #endif |
| |
| /* defaults */ |
| #ifndef MAX_BUFFER_SIZE |
| #define MAX_BUFFER_SIZE (64*1024) |
| #endif |
| #ifndef USE_FORMATS |
| #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) |
| #endif |
| #ifndef USE_CHANNELS_MIN |
| #define USE_CHANNELS_MIN 1 |
| #endif |
| #ifndef USE_CHANNELS_MAX |
| #define USE_CHANNELS_MAX 2 |
| #endif |
| #ifndef USE_PERIODS_MIN |
| #define USE_PERIODS_MIN 1 |
| #endif |
| #ifndef USE_PERIODS_MAX |
| #define USE_PERIODS_MAX 1024 |
| #endif |
| |
| static int snd_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
| static char *snd_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
| static int snd_enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; |
| static int snd_pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; |
| static int snd_pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; |
| //static int snd_midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; |
| |
| MODULE_PARM(snd_index, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(snd_index, "Index value for dummy soundcard."); |
| MODULE_PARM_SYNTAX(snd_index, SNDRV_INDEX_DESC); |
| MODULE_PARM(snd_id, "1-" __MODULE_STRING(SNDRV_CARDS) "s"); |
| MODULE_PARM_DESC(snd_id, "ID string for dummy soundcard."); |
| MODULE_PARM_SYNTAX(snd_id, SNDRV_ID_DESC); |
| MODULE_PARM(snd_enable, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(snd_enable, "Enable this dummy soundcard."); |
| MODULE_PARM_SYNTAX(snd_enable, SNDRV_ENABLE_DESC); |
| MODULE_PARM(snd_pcm_devs, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(snd_pcm_devs, "PCM devices # (0-4) for dummy driver."); |
| MODULE_PARM_SYNTAX(snd_pcm_devs, SNDRV_ENABLED ",allows:{{0,4}},default:1,dialog:list"); |
| MODULE_PARM(snd_pcm_substreams, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(snd_pcm_substreams, "PCM substreams # (1-16) for dummy driver."); |
| MODULE_PARM_SYNTAX(snd_pcm_substreams, SNDRV_ENABLED ",allows:{{1,16}},default:8,dialog:list"); |
| //MODULE_PARM(snd_midi_devs, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| //MODULE_PARM_DESC(snd_midi_devs, "MIDI devices # (0-2) for dummy driver."); |
| //MODULE_PARM_SYNTAX(snd_midi_devs, SNDRV_ENABLED ",allows:{{0,2}},default:8,dialog:list"); |
| |
| #define MIXER_ADDR_MASTER 0 |
| #define MIXER_ADDR_LINE 1 |
| #define MIXER_ADDR_MIC 2 |
| #define MIXER_ADDR_SYNTH 3 |
| #define MIXER_ADDR_CD 4 |
| #define MIXER_ADDR_LAST 4 |
| |
| typedef struct snd_card_dummy { |
| snd_card_t *card; |
| spinlock_t mixer_lock; |
| int mixer_volume[MIXER_ADDR_LAST+1][2]; |
| int capture_source[MIXER_ADDR_LAST+1][2]; |
| } snd_card_dummy_t; |
| |
| typedef struct snd_card_dummy_pcm { |
| snd_card_dummy_t *dummy; |
| spinlock_t lock; |
| struct timer_list timer; |
| unsigned int pcm_size; |
| unsigned int pcm_count; |
| unsigned int pcm_bps; /* bytes per second */ |
| unsigned int pcm_jiffie; /* bytes per one jiffie */ |
| unsigned int pcm_irq_pos; /* IRQ position */ |
| unsigned int pcm_buf_pos; /* position in buffer */ |
| snd_pcm_substream_t *substream; |
| } snd_card_dummy_pcm_t; |
| |
| static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; |
| |
| |
| static int snd_card_dummy_playback_ioctl(snd_pcm_substream_t * substream, |
| unsigned int cmd, |
| void *arg) |
| { |
| return snd_pcm_lib_ioctl(substream, cmd, arg); |
| } |
| |
| static int snd_card_dummy_capture_ioctl(snd_pcm_substream_t * substream, |
| unsigned int cmd, |
| void *arg) |
| { |
| return snd_pcm_lib_ioctl(substream, cmd, arg); |
| } |
| |
| static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return); |
| |
| dpcm->timer.expires = 1 + jiffies; |
| add_timer(&dpcm->timer); |
| } |
| |
| static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return); |
| |
| del_timer(&dpcm->timer); |
| } |
| |
| static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream, |
| int cmd) |
| { |
| if (cmd == SNDRV_PCM_TRIGGER_START) { |
| snd_card_dummy_pcm_timer_start(substream); |
| } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { |
| snd_card_dummy_pcm_timer_stop(substream); |
| } else { |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream, |
| int cmd) |
| { |
| if (cmd == SNDRV_PCM_TRIGGER_START) { |
| snd_card_dummy_pcm_timer_start(substream); |
| } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { |
| snd_card_dummy_pcm_timer_stop(substream); |
| } else { |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO); |
| unsigned int bps; |
| |
| bps = runtime->rate * runtime->channels; |
| bps *= snd_pcm_format_width(runtime->format); |
| bps /= 8; |
| if (bps <= 0) |
| return -EINVAL; |
| dpcm->pcm_bps = bps; |
| dpcm->pcm_jiffie = bps / HZ; |
| dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); |
| dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); |
| dpcm->pcm_irq_pos = 0; |
| dpcm->pcm_buf_pos = 0; |
| return 0; |
| } |
| |
| static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream) |
| { |
| return snd_card_dummy_pcm_prepare(substream); |
| } |
| |
| static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream) |
| { |
| return snd_card_dummy_pcm_prepare(substream); |
| } |
| |
| static void snd_card_dummy_pcm_timer_function(unsigned long data) |
| { |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, (void *)data, return); |
| |
| dpcm->timer.expires = 1 + jiffies; |
| add_timer(&dpcm->timer); |
| spin_lock_irq(&dpcm->lock); |
| dpcm->pcm_irq_pos += dpcm->pcm_jiffie; |
| dpcm->pcm_buf_pos += dpcm->pcm_jiffie; |
| dpcm->pcm_buf_pos %= dpcm->pcm_size; |
| while (dpcm->pcm_irq_pos >= dpcm->pcm_count) { |
| dpcm->pcm_irq_pos -= dpcm->pcm_count; |
| snd_pcm_period_elapsed(dpcm->substream); |
| } |
| spin_unlock_irq(&dpcm->lock); |
| } |
| |
| static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO); |
| |
| return bytes_to_frames(runtime, dpcm->pcm_buf_pos); |
| } |
| |
| static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO); |
| |
| return bytes_to_frames(runtime, dpcm->pcm_buf_pos); |
| } |
| |
| static snd_pcm_hardware_t snd_card_dummy_playback = |
| { |
| info: (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| formats: USE_FORMATS, |
| rates: SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, |
| rate_min: 5500, |
| rate_max: 48000, |
| channels_min: USE_CHANNELS_MIN, |
| channels_max: USE_CHANNELS_MAX, |
| buffer_bytes_max: MAX_BUFFER_SIZE, |
| period_bytes_min: 64, |
| period_bytes_max: MAX_BUFFER_SIZE, |
| periods_min: USE_PERIODS_MIN, |
| periods_max: USE_PERIODS_MAX, |
| fifo_size: 0, |
| }; |
| |
| static snd_pcm_hardware_t snd_card_dummy_capture = |
| { |
| info: (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| formats: USE_FORMATS, |
| rates: SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, |
| rate_min: 5500, |
| rate_max: 48000, |
| channels_min: USE_CHANNELS_MIN, |
| channels_max: USE_CHANNELS_MAX, |
| buffer_bytes_max: MAX_BUFFER_SIZE, |
| period_bytes_min: 64, |
| period_bytes_max: MAX_BUFFER_SIZE, |
| periods_min: USE_PERIODS_MIN, |
| periods_max: USE_PERIODS_MAX, |
| fifo_size: 0, |
| }; |
| |
| static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime) |
| { |
| snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return); |
| snd_magic_kfree(dpcm); |
| } |
| |
| static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm; |
| |
| dpcm = snd_magic_kcalloc(snd_card_dummy_pcm_t, 0, GFP_KERNEL); |
| if (dpcm == NULL) |
| return -ENOMEM; |
| if ((runtime->dma_area = snd_malloc_pages_fallback(MAX_BUFFER_SIZE, GFP_KERNEL, &runtime->dma_bytes)) == NULL) { |
| snd_magic_kfree(dpcm); |
| return -ENOMEM; |
| } |
| dpcm->timer.data = (unsigned long) dpcm; |
| dpcm->timer.function = snd_card_dummy_pcm_timer_function; |
| spin_lock_init(&dpcm->lock); |
| dpcm->substream = substream; |
| runtime->private_data = dpcm; |
| runtime->private_free = snd_card_dummy_runtime_free; |
| runtime->hw = snd_card_dummy_playback; |
| if (substream->pcm->device & 1) { |
| runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
| runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; |
| } |
| if (substream->pcm->device & 2) |
| runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); |
| return 0; |
| } |
| |
| static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_card_dummy_pcm_t *dpcm; |
| |
| dpcm = snd_magic_kcalloc(snd_card_dummy_pcm_t, 0, GFP_KERNEL); |
| if (dpcm == NULL) |
| return -ENOMEM; |
| if ((runtime->dma_area = snd_malloc_pages_fallback(MAX_BUFFER_SIZE, GFP_KERNEL, &runtime->dma_bytes)) == NULL) { |
| snd_magic_kfree(dpcm); |
| return -ENOMEM; |
| } |
| memset(runtime->dma_area, 0, runtime->dma_bytes); |
| dpcm->timer.data = (unsigned long) dpcm; |
| dpcm->timer.function = snd_card_dummy_pcm_timer_function; |
| spin_lock_init(&dpcm->lock); |
| dpcm->substream = substream; |
| runtime->private_data = dpcm; |
| runtime->private_free = snd_card_dummy_runtime_free; |
| runtime->hw = snd_card_dummy_capture; |
| if (substream->pcm->device == 1) { |
| runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
| runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; |
| } |
| if (substream->pcm->device & 2) |
| runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); |
| return 0; |
| } |
| |
| static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| |
| snd_free_pages(runtime->dma_area, runtime->dma_bytes); |
| return 0; |
| } |
| |
| static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| |
| snd_free_pages(runtime->dma_area, runtime->dma_bytes); |
| return 0; |
| } |
| |
| static snd_pcm_ops_t snd_card_dummy_playback_ops = { |
| open: snd_card_dummy_playback_open, |
| close: snd_card_dummy_playback_close, |
| ioctl: snd_card_dummy_playback_ioctl, |
| prepare: snd_card_dummy_playback_prepare, |
| trigger: snd_card_dummy_playback_trigger, |
| pointer: snd_card_dummy_playback_pointer, |
| }; |
| |
| static snd_pcm_ops_t snd_card_dummy_capture_ops = { |
| open: snd_card_dummy_capture_open, |
| close: snd_card_dummy_capture_close, |
| ioctl: snd_card_dummy_capture_ioctl, |
| prepare: snd_card_dummy_capture_prepare, |
| trigger: snd_card_dummy_capture_trigger, |
| pointer: snd_card_dummy_capture_pointer, |
| }; |
| |
| static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams) |
| { |
| snd_pcm_t *pcm; |
| int err; |
| |
| if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0) |
| return err; |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); |
| pcm->private_data = dummy; |
| pcm->info_flags = 0; |
| strcpy(pcm->name, "Dummy PCM"); |
| return 0; |
| } |
| |
| #define DUMMY_VOLUME(xname, xindex, addr) \ |
| { iface: SNDRV_CTL_ELEM_IFACE_MIXER, name: xname, index: xindex, \ |
| info: snd_dummy_volume_info, \ |
| get: snd_dummy_volume_get, put: snd_dummy_volume_put, \ |
| private_value: addr } |
| |
| static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) |
| { |
| uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| uinfo->count = 2; |
| uinfo->value.integer.min = 0; |
| uinfo->value.integer.max = 100; |
| return 0; |
| } |
| |
| static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) |
| { |
| snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol); |
| unsigned long flags; |
| int addr = kcontrol->private_value; |
| |
| spin_lock_irqsave(&dummy->mixer_lock, flags); |
| ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
| ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; |
| spin_unlock_irqrestore(&dummy->mixer_lock, flags); |
| return 0; |
| } |
| |
| static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) |
| { |
| snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol); |
| unsigned long flags; |
| int change, addr = kcontrol->private_value; |
| int left, right; |
| |
| left = ucontrol->value.integer.value[0] % 101; |
| right = ucontrol->value.integer.value[1] % 101; |
| spin_lock_irqsave(&dummy->mixer_lock, flags); |
| change = dummy->mixer_volume[addr][0] != left && |
| dummy->mixer_volume[addr][1] != right; |
| dummy->mixer_volume[addr][0] = left; |
| dummy->mixer_volume[addr][1] = right; |
| spin_unlock_irqrestore(&dummy->mixer_lock, flags); |
| return change; |
| } |
| |
| #define DUMMY_CAPSRC(xname, xindex, addr) \ |
| { iface: SNDRV_CTL_ELEM_IFACE_MIXER, name: xname, index: xindex, \ |
| info: snd_dummy_capsrc_info, \ |
| get: snd_dummy_capsrc_get, put: snd_dummy_capsrc_put, \ |
| private_value: addr } |
| |
| static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) |
| { |
| uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| uinfo->count = 2; |
| uinfo->value.integer.min = 0; |
| uinfo->value.integer.max = 1; |
| return 0; |
| } |
| |
| static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) |
| { |
| snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol); |
| unsigned long flags; |
| int addr = kcontrol->private_value; |
| |
| spin_lock_irqsave(&dummy->mixer_lock, flags); |
| ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
| ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; |
| spin_unlock_irqrestore(&dummy->mixer_lock, flags); |
| return 0; |
| } |
| |
| static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) |
| { |
| snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol); |
| unsigned long flags; |
| int change, addr = kcontrol->private_value; |
| int left, right; |
| |
| left = ucontrol->value.integer.value[0] & 1; |
| right = ucontrol->value.integer.value[1] & 1; |
| spin_lock_irqsave(&dummy->mixer_lock, flags); |
| change = dummy->capture_source[addr][0] != left && |
| dummy->capture_source[addr][1] != right; |
| dummy->capture_source[addr][0] = left; |
| dummy->capture_source[addr][1] = right; |
| spin_unlock_irqrestore(&dummy->mixer_lock, flags); |
| return change; |
| } |
| |
| #define DUMMY_CONTROLS (sizeof(snd_dummy_controls)/sizeof(snd_kcontrol_new_t)) |
| |
| static snd_kcontrol_new_t snd_dummy_controls[] = { |
| DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), |
| DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), |
| DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), |
| DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER), |
| DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), |
| DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER), |
| DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), |
| DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER), |
| DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), |
| DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER) |
| }; |
| |
| int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy) |
| { |
| snd_card_t *card = dummy->card; |
| int idx, err; |
| |
| snd_assert(dummy != NULL, return -EINVAL); |
| spin_lock_init(&dummy->mixer_lock); |
| strcpy(card->mixername, "Dummy Mixer"); |
| |
| for (idx = 0; idx < DUMMY_CONTROLS; idx++) { |
| if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) |
| return err; |
| } |
| return 0; |
| } |
| |
| static int __init snd_card_dummy_probe(int dev) |
| { |
| snd_card_t *card; |
| struct snd_card_dummy *dummy; |
| int idx, err; |
| |
| if (!snd_enable[dev]) |
| return -ENODEV; |
| card = snd_card_new(snd_index[dev], snd_id[dev], THIS_MODULE, |
| sizeof(struct snd_card_dummy)); |
| if (card == NULL) |
| return -ENOMEM; |
| dummy = (struct snd_card_dummy *)card->private_data; |
| dummy->card = card; |
| for (idx = 0; idx < MAX_PCM_DEVICES && idx < snd_pcm_devs[dev]; idx++) { |
| if (snd_pcm_substreams[dev] < 1) |
| snd_pcm_substreams[dev] = 1; |
| if (snd_pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) |
| snd_pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; |
| if ((err = snd_card_dummy_pcm(dummy, idx, snd_pcm_substreams[dev])) < 0) |
| goto __nodev; |
| } |
| if ((err = snd_card_dummy_new_mixer(dummy)) < 0) |
| goto __nodev; |
| strcpy(card->driver, "Dummy"); |
| strcpy(card->shortname, "Dummy"); |
| sprintf(card->longname, "Dummy %i", dev + 1); |
| if ((err = snd_card_register(card)) == 0) { |
| snd_dummy_cards[dev] = card; |
| return 0; |
| } |
| __nodev: |
| snd_card_free(card); |
| return err; |
| } |
| |
| static int __init alsa_card_dummy_init(void) |
| { |
| int dev, cards; |
| |
| for (dev = cards = 0; dev < SNDRV_CARDS && snd_enable[dev]; dev++) { |
| if (snd_card_dummy_probe(dev) < 0) { |
| #ifdef MODULE |
| printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1); |
| #endif |
| break; |
| } |
| cards++; |
| } |
| if (!cards) { |
| #ifdef MODULE |
| printk(KERN_ERR "Dummy soundcard not found or device busy\n"); |
| #endif |
| return -ENODEV; |
| } |
| return 0; |
| } |
| |
| static void __exit alsa_card_dummy_exit(void) |
| { |
| int idx; |
| |
| for (idx = 0; idx < SNDRV_CARDS; idx++) |
| snd_card_free(snd_dummy_cards[idx]); |
| } |
| |
| module_init(alsa_card_dummy_init) |
| module_exit(alsa_card_dummy_exit) |
| |
| #ifndef MODULE |
| |
| /* format is: snd-dummy=snd_enable,snd_index,snd_id, |
| snd_pcm_devs,snd_pcm_substreams */ |
| |
| static int __init alsa_card_dummy_setup(char *str) |
| { |
| static unsigned __initdata nr_dev = 0; |
| |
| if (nr_dev >= SNDRV_CARDS) |
| return 0; |
| (void)(get_option(&str,&snd_enable[nr_dev]) == 2 && |
| get_option(&str,&snd_index[nr_dev]) == 2 && |
| get_id(&str,&snd_id[nr_dev]) == 2 && |
| get_option(&str,&snd_pcm_devs[nr_dev]) == 2 && |
| get_option(&str,&snd_pcm_substreams[nr_dev]) == 2); |
| nr_dev++; |
| return 1; |
| } |
| |
| __setup("snd-dummy=", alsa_card_dummy_setup); |
| |
| #endif /* ifndef MODULE */ |