| /* |
| * 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/jiffies.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <linux/wait.h> |
| #include <linux/moduleparam.h> |
| #include <sound/core.h> |
| #include <sound/control.h> |
| #include <sound/pcm.h> |
| #include <sound/rawmidi.h> |
| #include <sound/initval.h> |
| |
| MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); |
| MODULE_LICENSE("GPL"); |
| MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); |
| |
| #define MAX_PCM_DEVICES 4 |
| #define MAX_PCM_SUBSTREAMS 16 |
| #define MAX_MIDI_DEVICES 2 |
| |
| #if 0 /* emu10k1 emulation */ |
| #define MAX_BUFFER_SIZE (128 * 1024) |
| static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime) |
| { |
| int err; |
| if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) |
| return err; |
| if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) |
| return err; |
| return 0; |
| } |
| #define add_playback_constraints emu10k1_playback_constraints |
| #endif |
| |
| #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 |
| |
| #if 0 /* ICE1712 emulation */ |
| #define MAX_BUFFER_SIZE (256 * 1024) |
| #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE |
| #define USE_CHANNELS_MIN 10 |
| #define USE_CHANNELS_MAX 10 |
| #define USE_PERIODS_MIN 1 |
| #define USE_PERIODS_MAX 1024 |
| #endif |
| |
| #if 0 /* UDA1341 emulation */ |
| #define MAX_BUFFER_SIZE (16380) |
| #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE |
| #define USE_CHANNELS_MIN 2 |
| #define USE_CHANNELS_MAX 2 |
| #define USE_PERIODS_MIN 2 |
| #define USE_PERIODS_MAX 255 |
| #endif |
| |
| #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */ |
| #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE |
| #define USE_CHANNELS_MIN 2 |
| #define USE_CHANNELS_MAX 2 |
| #define USE_RATE SNDRV_PCM_RATE_48000 |
| #define USE_RATE_MIN 48000 |
| #define USE_RATE_MAX 48000 |
| #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_RATE |
| #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 |
| #define USE_RATE_MIN 5500 |
| #define USE_RATE_MAX 48000 |
| #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 |
| #ifndef add_playback_constraints |
| #define add_playback_constraints(x) 0 |
| #endif |
| #ifndef add_capture_constraints |
| #define add_capture_constraints(x) 0 |
| #endif |
| |
| static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
| static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
| static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; |
| static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; |
| static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; |
| //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; |
| |
| module_param_array(index, int, NULL, 0444); |
| MODULE_PARM_DESC(index, "Index value for dummy soundcard."); |
| module_param_array(id, charp, NULL, 0444); |
| MODULE_PARM_DESC(id, "ID string for dummy soundcard."); |
| module_param_array(enable, bool, NULL, 0444); |
| MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); |
| module_param_array(pcm_devs, int, NULL, 0444); |
| MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); |
| module_param_array(pcm_substreams, int, NULL, 0444); |
| MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); |
| //module_param_array(midi_devs, int, NULL, 0444); |
| //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); |
| |
| #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 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 = runtime->private_data; |
| |
| 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 = runtime->private_data; |
| |
| 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 = runtime->private_data; |
| 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_card_dummy_pcm_t *)data; |
| |
| 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; |
| if (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 = runtime->private_data; |
| |
| 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 = runtime->private_data; |
| |
| 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 = USE_RATE, |
| .rate_min = USE_RATE_MIN, |
| .rate_max = USE_RATE_MAX, |
| .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 = USE_RATE, |
| .rate_min = USE_RATE_MIN, |
| .rate_max = USE_RATE_MAX, |
| .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 = runtime->private_data; |
| kfree(dpcm); |
| } |
| |
| static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream, |
| snd_pcm_hw_params_t * hw_params) |
| { |
| return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); |
| } |
| |
| static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream) |
| { |
| return snd_pcm_lib_free_pages(substream); |
| } |
| |
| 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; |
| int err; |
| |
| dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); |
| if (dpcm == NULL) |
| return -ENOMEM; |
| init_timer(&dpcm->timer); |
| 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); |
| if ((err = add_playback_constraints(runtime)) < 0) { |
| kfree(dpcm); |
| return err; |
| } |
| |
| 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; |
| int err; |
| |
| dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); |
| if (dpcm == NULL) |
| return -ENOMEM; |
| init_timer(&dpcm->timer); |
| 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); |
| if ((err = add_capture_constraints(runtime)) < 0) { |
| kfree(dpcm); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream) |
| { |
| return 0; |
| } |
| |
| static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream) |
| { |
| 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_pcm_lib_ioctl, |
| .hw_params = snd_card_dummy_hw_params, |
| .hw_free = snd_card_dummy_hw_free, |
| .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_pcm_lib_ioctl, |
| .hw_params = snd_card_dummy_hw_params, |
| .hw_free = snd_card_dummy_hw_free, |
| .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"); |
| snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, |
| snd_dma_continuous_data(GFP_KERNEL), |
| 0, 64*1024); |
| 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 = -50; |
| 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]; |
| if (left < -50) |
| left = -50; |
| if (left > 100) |
| left = 100; |
| right = ucontrol->value.integer.value[1]; |
| if (right < -50) |
| right = -50; |
| if (right > 100) |
| right = 100; |
| 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; |
| } |
| |
| 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) |
| }; |
| |
| static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy) |
| { |
| snd_card_t *card = dummy->card; |
| unsigned int idx; |
| int err; |
| |
| snd_assert(dummy != NULL, return -EINVAL); |
| spin_lock_init(&dummy->mixer_lock); |
| strcpy(card->mixername, "Dummy Mixer"); |
| |
| for (idx = 0; idx < ARRAY_SIZE(snd_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 (!enable[dev]) |
| return -ENODEV; |
| card = snd_card_new(index[dev], 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 < pcm_devs[dev]; idx++) { |
| if (pcm_substreams[dev] < 1) |
| pcm_substreams[dev] = 1; |
| if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) |
| pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; |
| if ((err = snd_card_dummy_pcm(dummy, idx, 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 && 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) |