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sound/drivers/dummy.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Dummy soundcard |
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
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*/ |
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#include <linux/init.h> |
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#include <linux/err.h> #include <linux/platform_device.h> |
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#include <linux/jiffies.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/wait.h> |
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#include <linux/hrtimer.h> #include <linux/math64.h> |
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#include <linux/module.h> |
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#include <sound/core.h> #include <sound/control.h> |
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#include <sound/tlv.h> |
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#include <sound/pcm.h> #include <sound/rawmidi.h> |
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#include <sound/info.h> |
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#include <sound/initval.h> |
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
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MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); MODULE_LICENSE("GPL"); MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); #define MAX_PCM_DEVICES 4 |
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#define MAX_PCM_SUBSTREAMS 128 |
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#define MAX_MIDI_DEVICES 2 |
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/* defaults */ |
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#define MAX_BUFFER_SIZE (64*1024) |
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#define MIN_PERIOD_SIZE 64 |
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#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE |
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#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) |
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#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 #define USE_RATE_MIN 5500 #define USE_RATE_MAX 48000 |
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#define USE_CHANNELS_MIN 1 |
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#define USE_CHANNELS_MAX 2 |
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#define USE_PERIODS_MIN 1 |
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#define USE_PERIODS_MAX 1024 |
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
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static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; |
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static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL}; |
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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}; |
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#ifdef CONFIG_HIGH_RES_TIMERS |
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static bool hrtimer = 1; |
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#endif |
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static bool fake_buffer = 1; |
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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."); |
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module_param_array(model, charp, NULL, 0444); MODULE_PARM_DESC(model, "Soundcard model."); |
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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); |
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MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver."); |
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//module_param_array(midi_devs, int, NULL, 0444); //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); |
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module_param(fake_buffer, bool, 0444); MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations."); |
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#ifdef CONFIG_HIGH_RES_TIMERS |
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module_param(hrtimer, bool, 0644); |
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MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source."); #endif |
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static struct platform_device *devices[SNDRV_CARDS]; |
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#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 |
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struct dummy_timer_ops { int (*create)(struct snd_pcm_substream *); void (*free)(struct snd_pcm_substream *); int (*prepare)(struct snd_pcm_substream *); int (*start)(struct snd_pcm_substream *); int (*stop)(struct snd_pcm_substream *); snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *); }; |
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#define get_dummy_ops(substream) \ (*(const struct dummy_timer_ops **)(substream)->runtime->private_data) |
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struct dummy_model { const char *name; int (*playback_constraints)(struct snd_pcm_runtime *runtime); int (*capture_constraints)(struct snd_pcm_runtime *runtime); u64 formats; size_t buffer_bytes_max; size_t period_bytes_min; size_t period_bytes_max; unsigned int periods_min; unsigned int periods_max; unsigned int rates; unsigned int rate_min; unsigned int rate_max; unsigned int channels_min; unsigned int channels_max; }; |
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struct snd_dummy { struct snd_card *card; |
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struct dummy_model *model; |
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struct snd_pcm *pcm; |
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struct snd_pcm_hardware pcm_hw; |
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spinlock_t mixer_lock; int mixer_volume[MIXER_ADDR_LAST+1][2]; int capture_source[MIXER_ADDR_LAST+1][2]; |
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int iobox; struct snd_kcontrol *cd_volume_ctl; struct snd_kcontrol *cd_switch_ctl; |
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}; |
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/* |
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* card models */ static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) { int err; err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (err < 0) return err; err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX); if (err < 0) return err; return 0; } |
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static struct dummy_model model_emu10k1 = { |
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.name = "emu10k1", .playback_constraints = emu10k1_playback_constraints, .buffer_bytes_max = 128 * 1024, }; |
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static struct dummy_model model_rme9652 = { |
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.name = "rme9652", .buffer_bytes_max = 26 * 64 * 1024, .formats = SNDRV_PCM_FMTBIT_S32_LE, .channels_min = 26, .channels_max = 26, .periods_min = 2, .periods_max = 2, }; |
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static struct dummy_model model_ice1712 = { |
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.name = "ice1712", .buffer_bytes_max = 256 * 1024, .formats = SNDRV_PCM_FMTBIT_S32_LE, .channels_min = 10, .channels_max = 10, .periods_min = 1, .periods_max = 1024, }; |
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static struct dummy_model model_uda1341 = { |
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.name = "uda1341", .buffer_bytes_max = 16380, .formats = SNDRV_PCM_FMTBIT_S16_LE, .channels_min = 2, .channels_max = 2, .periods_min = 2, .periods_max = 255, }; |
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static struct dummy_model model_ac97 = { |
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.name = "ac97", .formats = SNDRV_PCM_FMTBIT_S16_LE, .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_48000, .rate_min = 48000, .rate_max = 48000, }; |
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static struct dummy_model model_ca0106 = { |
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.name = "ca0106", .formats = SNDRV_PCM_FMTBIT_S16_LE, .buffer_bytes_max = ((65536-64)*8), .period_bytes_max = (65536-64), .periods_min = 2, .periods_max = 8, .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000, .rate_min = 48000, .rate_max = 192000, }; |
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static struct dummy_model *dummy_models[] = { |
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&model_emu10k1, &model_rme9652, &model_ice1712, &model_uda1341, &model_ac97, &model_ca0106, NULL }; /* |
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* system timer interface */ struct dummy_systimer_pcm { |
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/* ops must be the first item */ const struct dummy_timer_ops *timer_ops; |
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spinlock_t lock; struct timer_list timer; |
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unsigned long base_time; unsigned int frac_pos; /* fractional sample position (based HZ) */ |
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unsigned int frac_period_rest; |
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unsigned int frac_buffer_size; /* buffer_size * HZ */ unsigned int frac_period_size; /* period_size * HZ */ unsigned int rate; |
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int elapsed; |
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struct snd_pcm_substream *substream; }; |
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static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) { |
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mod_timer(&dpcm->timer, jiffies + (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate); |
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} static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) { unsigned long delta; delta = jiffies - dpcm->base_time; if (!delta) return; |
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dpcm->base_time += delta; delta *= dpcm->rate; dpcm->frac_pos += delta; |
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while (dpcm->frac_pos >= dpcm->frac_buffer_size) dpcm->frac_pos -= dpcm->frac_buffer_size; |
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while (dpcm->frac_period_rest <= delta) { dpcm->elapsed++; dpcm->frac_period_rest += dpcm->frac_period_size; } dpcm->frac_period_rest -= delta; |
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} |
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static int dummy_systimer_start(struct snd_pcm_substream *substream) |
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{ |
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struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; spin_lock(&dpcm->lock); |
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dpcm->base_time = jiffies; dummy_systimer_rearm(dpcm); |
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spin_unlock(&dpcm->lock); return 0; |
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} |
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static int dummy_systimer_stop(struct snd_pcm_substream *substream) |
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{ |
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struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
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spin_lock(&dpcm->lock); |
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del_timer(&dpcm->timer); |
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spin_unlock(&dpcm->lock); |
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return 0; |
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} |
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static int dummy_systimer_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct dummy_systimer_pcm *dpcm = runtime->private_data; |
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dpcm->frac_pos = 0; dpcm->rate = runtime->rate; dpcm->frac_buffer_size = runtime->buffer_size * HZ; dpcm->frac_period_size = runtime->period_size * HZ; |
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dpcm->frac_period_rest = dpcm->frac_period_size; dpcm->elapsed = 0; |
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return 0; } |
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static void dummy_systimer_callback(struct timer_list *t) |
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{ |
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struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer); |
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unsigned long flags; |
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int elapsed = 0; |
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spin_lock_irqsave(&dpcm->lock, flags); |
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dummy_systimer_update(dpcm); dummy_systimer_rearm(dpcm); |
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elapsed = dpcm->elapsed; dpcm->elapsed = 0; |
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spin_unlock_irqrestore(&dpcm->lock, flags); |
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if (elapsed) snd_pcm_period_elapsed(dpcm->substream); |
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} |
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static snd_pcm_uframes_t dummy_systimer_pointer(struct snd_pcm_substream *substream) |
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{ |
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struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
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snd_pcm_uframes_t pos; |
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spin_lock(&dpcm->lock); dummy_systimer_update(dpcm); |
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pos = dpcm->frac_pos / HZ; |
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spin_unlock(&dpcm->lock); |
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return pos; |
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} |
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static int dummy_systimer_create(struct snd_pcm_substream *substream) |
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{ |
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struct dummy_systimer_pcm *dpcm; dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); if (!dpcm) return -ENOMEM; substream->runtime->private_data = dpcm; |
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timer_setup(&dpcm->timer, dummy_systimer_callback, 0); |
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spin_lock_init(&dpcm->lock); dpcm->substream = substream; return 0; } static void dummy_systimer_free(struct snd_pcm_substream *substream) { kfree(substream->runtime->private_data); } |
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static const struct dummy_timer_ops dummy_systimer_ops = { |
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.create = dummy_systimer_create, .free = dummy_systimer_free, .prepare = dummy_systimer_prepare, .start = dummy_systimer_start, .stop = dummy_systimer_stop, .pointer = dummy_systimer_pointer, |
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}; |
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#ifdef CONFIG_HIGH_RES_TIMERS /* * hrtimer interface */ struct dummy_hrtimer_pcm { |
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/* ops must be the first item */ const struct dummy_timer_ops *timer_ops; |
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ktime_t base_time; ktime_t period_time; atomic_t running; struct hrtimer timer; |
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struct snd_pcm_substream *substream; }; |
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static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) { struct dummy_hrtimer_pcm *dpcm; dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer); if (!atomic_read(&dpcm->running)) return HRTIMER_NORESTART; |
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/* * In cases of XRUN and draining, this calls .trigger to stop PCM * substream. */ snd_pcm_period_elapsed(dpcm->substream); if (!atomic_read(&dpcm->running)) return HRTIMER_NORESTART; |
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hrtimer_forward_now(timer, dpcm->period_time); return HRTIMER_RESTART; } static int dummy_hrtimer_start(struct snd_pcm_substream *substream) { struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer); |
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hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT); |
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atomic_set(&dpcm->running, 1); return 0; } static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) { struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; atomic_set(&dpcm->running, 0); |
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if (!hrtimer_callback_running(&dpcm->timer)) hrtimer_cancel(&dpcm->timer); |
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return 0; } static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) { |
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hrtimer_cancel(&dpcm->timer); |
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} static snd_pcm_uframes_t dummy_hrtimer_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct dummy_hrtimer_pcm *dpcm = runtime->private_data; u64 delta; u32 pos; delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer), dpcm->base_time); delta = div_u64(delta * runtime->rate + 999999, 1000000); div_u64_rem(delta, runtime->buffer_size, &pos); return pos; } static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; struct dummy_hrtimer_pcm *dpcm = runtime->private_data; unsigned int period, rate; long sec; unsigned long nsecs; dummy_hrtimer_sync(dpcm); period = runtime->period_size; rate = runtime->rate; sec = period / rate; period %= rate; nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate); dpcm->period_time = ktime_set(sec, nsecs); return 0; } static int dummy_hrtimer_create(struct snd_pcm_substream *substream) { struct dummy_hrtimer_pcm *dpcm; dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); if (!dpcm) return -ENOMEM; substream->runtime->private_data = dpcm; |
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hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT); |
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dpcm->timer.function = dummy_hrtimer_callback; dpcm->substream = substream; atomic_set(&dpcm->running, 0); |
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return 0; } static void dummy_hrtimer_free(struct snd_pcm_substream *substream) { struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; dummy_hrtimer_sync(dpcm); kfree(dpcm); } |
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static const struct dummy_timer_ops dummy_hrtimer_ops = { |
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.create = dummy_hrtimer_create, .free = dummy_hrtimer_free, .prepare = dummy_hrtimer_prepare, .start = dummy_hrtimer_start, .stop = dummy_hrtimer_stop, .pointer = dummy_hrtimer_pointer, }; #endif /* CONFIG_HIGH_RES_TIMERS */ /* * PCM interface */ static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { |
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switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: |
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return get_dummy_ops(substream)->start(substream); |
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case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: |
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return get_dummy_ops(substream)->stop(substream); |
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} return -EINVAL; } static int dummy_pcm_prepare(struct snd_pcm_substream *substream) { |
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return get_dummy_ops(substream)->prepare(substream); |
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} static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) { |
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return get_dummy_ops(substream)->pointer(substream); |
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} |
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static const struct snd_pcm_hardware dummy_pcm_hardware = { |
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), |
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483 484 485 486 487 488 489 |
.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, |
d5e1ca05f
|
490 |
.period_bytes_min = MIN_PERIOD_SIZE, |
2ad5dd8dc
|
491 |
.period_bytes_max = MAX_PERIOD_SIZE, |
1da177e4c
|
492 493 494 495 |
.periods_min = USE_PERIODS_MIN, .periods_max = USE_PERIODS_MAX, .fifo_size = 0, }; |
c631d03c6
|
496 497 |
static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) |
1da177e4c
|
498 |
{ |
a68c4d113
|
499 500 501 502 503 |
if (fake_buffer) { /* runtime->dma_bytes has to be set manually to allow mmap */ substream->runtime->dma_bytes = params_buffer_bytes(hw_params); return 0; } |
c631d03c6
|
504 505 |
return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); |
1da177e4c
|
506 |
} |
c631d03c6
|
507 |
static int dummy_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4c
|
508 |
{ |
a68c4d113
|
509 510 |
if (fake_buffer) return 0; |
1da177e4c
|
511 512 |
return snd_pcm_lib_free_pages(substream); } |
c631d03c6
|
513 |
static int dummy_pcm_open(struct snd_pcm_substream *substream) |
c8eb6ba16
|
514 |
{ |
c631d03c6
|
515 |
struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
d5e1ca05f
|
516 |
struct dummy_model *model = dummy->model; |
4a4d2cfd8
|
517 |
struct snd_pcm_runtime *runtime = substream->runtime; |
ddce57a6f
|
518 |
const struct dummy_timer_ops *ops; |
c8eb6ba16
|
519 |
int err; |
ddce57a6f
|
520 |
ops = &dummy_systimer_ops; |
c631d03c6
|
521 522 |
#ifdef CONFIG_HIGH_RES_TIMERS if (hrtimer) |
ddce57a6f
|
523 |
ops = &dummy_hrtimer_ops; |
c631d03c6
|
524 |
#endif |
ddce57a6f
|
525 |
err = ops->create(substream); |
1a11cb642
|
526 |
if (err < 0) |
1da177e4c
|
527 |
return err; |
ddce57a6f
|
528 |
get_dummy_ops(substream) = ops; |
1da177e4c
|
529 |
|
d5e1ca05f
|
530 |
runtime->hw = dummy->pcm_hw; |
c631d03c6
|
531 |
if (substream->pcm->device & 1) { |
1da177e4c
|
532 533 534 535 |
runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; } if (substream->pcm->device & 2) |
c631d03c6
|
536 537 |
runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID); |
d5e1ca05f
|
538 539 540 541 542 543 544 545 546 547 |
if (model == NULL) return 0; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { if (model->playback_constraints) err = model->playback_constraints(substream->runtime); } else { if (model->capture_constraints) err = model->capture_constraints(substream->runtime); } |
c631d03c6
|
548 |
if (err < 0) { |
ddce57a6f
|
549 |
get_dummy_ops(substream)->free(substream); |
1da177e4c
|
550 |
return err; |
c631d03c6
|
551 |
} |
1da177e4c
|
552 553 |
return 0; } |
c631d03c6
|
554 |
static int dummy_pcm_close(struct snd_pcm_substream *substream) |
1da177e4c
|
555 |
{ |
ddce57a6f
|
556 |
get_dummy_ops(substream)->free(substream); |
1da177e4c
|
557 558 |
return 0; } |
a68c4d113
|
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 |
/* * dummy buffer handling */ static void *dummy_page[2]; static void free_fake_buffer(void) { if (fake_buffer) { int i; for (i = 0; i < 2; i++) if (dummy_page[i]) { free_page((unsigned long)dummy_page[i]); dummy_page[i] = NULL; } } } static int alloc_fake_buffer(void) { int i; if (!fake_buffer) return 0; for (i = 0; i < 2; i++) { dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL); if (!dummy_page[i]) { free_fake_buffer(); return -ENOMEM; } } return 0; } static int dummy_pcm_copy(struct snd_pcm_substream *substream, |
d53611d21
|
594 595 596 597 598 599 600 601 602 |
int channel, unsigned long pos, void __user *dst, unsigned long bytes) { return 0; /* do nothing */ } static int dummy_pcm_copy_kernel(struct snd_pcm_substream *substream, int channel, unsigned long pos, void *dst, unsigned long bytes) |
a68c4d113
|
603 604 605 606 607 |
{ return 0; /* do nothing */ } static int dummy_pcm_silence(struct snd_pcm_substream *substream, |
d53611d21
|
608 609 |
int channel, unsigned long pos, unsigned long bytes) |
a68c4d113
|
610 611 612 613 614 615 616 617 618 |
{ return 0; /* do nothing */ } static struct page *dummy_pcm_page(struct snd_pcm_substream *substream, unsigned long offset) { return virt_to_page(dummy_page[substream->stream]); /* the same page */ } |
c631d03c6
|
619 620 621 622 623 624 625 626 627 |
static struct snd_pcm_ops dummy_pcm_ops = { .open = dummy_pcm_open, .close = dummy_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = dummy_pcm_hw_params, .hw_free = dummy_pcm_hw_free, .prepare = dummy_pcm_prepare, .trigger = dummy_pcm_trigger, .pointer = dummy_pcm_pointer, |
1da177e4c
|
628 |
}; |
a68c4d113
|
629 630 631 632 633 634 635 636 637 |
static struct snd_pcm_ops dummy_pcm_ops_no_buf = { .open = dummy_pcm_open, .close = dummy_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = dummy_pcm_hw_params, .hw_free = dummy_pcm_hw_free, .prepare = dummy_pcm_prepare, .trigger = dummy_pcm_trigger, .pointer = dummy_pcm_pointer, |
d53611d21
|
638 639 640 |
.copy_user = dummy_pcm_copy, .copy_kernel = dummy_pcm_copy_kernel, .fill_silence = dummy_pcm_silence, |
a68c4d113
|
641 642 |
.page = dummy_pcm_page, }; |
fbbb01a12
|
643 644 |
static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams) |
1da177e4c
|
645 |
{ |
4a4d2cfd8
|
646 |
struct snd_pcm *pcm; |
a68c4d113
|
647 |
struct snd_pcm_ops *ops; |
1da177e4c
|
648 |
int err; |
1a11cb642
|
649 650 651 |
err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm); if (err < 0) |
1da177e4c
|
652 |
return err; |
6e65c1cc4
|
653 |
dummy->pcm = pcm; |
a68c4d113
|
654 655 656 657 658 659 |
if (fake_buffer) ops = &dummy_pcm_ops_no_buf; else ops = &dummy_pcm_ops; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops); |
1da177e4c
|
660 661 662 |
pcm->private_data = dummy; pcm->info_flags = 0; strcpy(pcm->name, "Dummy PCM"); |
a68c4d113
|
663 664 665 666 667 668 |
if (!fake_buffer) { snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), 0, 64*1024); } |
1da177e4c
|
669 670 |
return 0; } |
9b151fec1
|
671 672 673 |
/* * mixer interface */ |
1da177e4c
|
674 |
#define DUMMY_VOLUME(xname, xindex, addr) \ |
fb567a8e4
|
675 676 677 |
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ .name = xname, .index = xindex, \ |
1da177e4c
|
678 679 |
.info = snd_dummy_volume_info, \ .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ |
fb567a8e4
|
680 681 |
.private_value = addr, \ .tlv = { .p = db_scale_dummy } } |
1da177e4c
|
682 |
|
4a4d2cfd8
|
683 684 |
static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
1da177e4c
|
685 686 687 688 689 690 691 692 |
{ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 2; uinfo->value.integer.min = -50; uinfo->value.integer.max = 100; return 0; } |
4a4d2cfd8
|
693 694 |
static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4c
|
695 |
{ |
4a4d2cfd8
|
696 |
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4c
|
697 |
int addr = kcontrol->private_value; |
c8eb6ba16
|
698 |
spin_lock_irq(&dummy->mixer_lock); |
1da177e4c
|
699 700 |
ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; |
c8eb6ba16
|
701 |
spin_unlock_irq(&dummy->mixer_lock); |
1da177e4c
|
702 703 |
return 0; } |
4a4d2cfd8
|
704 705 |
static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4c
|
706 |
{ |
4a4d2cfd8
|
707 |
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4c
|
708 709 710 711 712 713 714 715 716 717 718 719 720 |
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; |
c8eb6ba16
|
721 |
spin_lock_irq(&dummy->mixer_lock); |
1da177e4c
|
722 723 724 725 |
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; |
c8eb6ba16
|
726 |
spin_unlock_irq(&dummy->mixer_lock); |
1da177e4c
|
727 728 |
return change; } |
0cb29ea0d
|
729 |
static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); |
fb567a8e4
|
730 |
|
1da177e4c
|
731 732 733 734 735 |
#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 } |
a5ce88909
|
736 |
#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info |
1da177e4c
|
737 |
|
4a4d2cfd8
|
738 739 |
static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4c
|
740 |
{ |
4a4d2cfd8
|
741 |
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4c
|
742 |
int addr = kcontrol->private_value; |
c8eb6ba16
|
743 |
spin_lock_irq(&dummy->mixer_lock); |
1da177e4c
|
744 745 |
ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; |
c8eb6ba16
|
746 |
spin_unlock_irq(&dummy->mixer_lock); |
1da177e4c
|
747 748 |
return 0; } |
4a4d2cfd8
|
749 |
static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4c
|
750 |
{ |
4a4d2cfd8
|
751 |
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4c
|
752 753 754 755 756 |
int change, addr = kcontrol->private_value; int left, right; left = ucontrol->value.integer.value[0] & 1; right = ucontrol->value.integer.value[1] & 1; |
c8eb6ba16
|
757 |
spin_lock_irq(&dummy->mixer_lock); |
1da177e4c
|
758 759 760 761 |
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; |
c8eb6ba16
|
762 |
spin_unlock_irq(&dummy->mixer_lock); |
1da177e4c
|
763 764 |
return change; } |
16e434670
|
765 766 767 |
static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *info) { |
a4a1b7370
|
768 |
static const char *const names[] = { "None", "CD Player" }; |
16e434670
|
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 |
return snd_ctl_enum_info(info, 1, 2, names); } static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); value->value.enumerated.item[0] = dummy->iobox; return 0; } static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); int changed; if (value->value.enumerated.item[0] > 1) return -EINVAL; changed = value->value.enumerated.item[0] != dummy->iobox; if (changed) { dummy->iobox = value->value.enumerated.item[0]; if (dummy->iobox) { dummy->cd_volume_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; dummy->cd_switch_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; } else { dummy->cd_volume_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; dummy->cd_switch_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; } snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO, &dummy->cd_volume_ctl->id); snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO, &dummy->cd_switch_ctl->id); } return changed; } |
4a4d2cfd8
|
815 |
static struct snd_kcontrol_new snd_dummy_controls[] = { |
1da177e4c
|
816 817 818 |
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), |
e05d69642
|
819 |
DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH), |
1da177e4c
|
820 |
DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), |
e05d69642
|
821 |
DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE), |
1da177e4c
|
822 |
DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), |
e05d69642
|
823 |
DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC), |
1da177e4c
|
824 |
DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), |
16e434670
|
825 826 827 828 829 830 831 832 |
DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD), { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "External I/O Box", .info = snd_dummy_iobox_info, .get = snd_dummy_iobox_get, .put = snd_dummy_iobox_put, }, |
1da177e4c
|
833 |
}; |
fbbb01a12
|
834 |
static int snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
1da177e4c
|
835 |
{ |
4a4d2cfd8
|
836 |
struct snd_card *card = dummy->card; |
16e434670
|
837 |
struct snd_kcontrol *kcontrol; |
1da177e4c
|
838 839 |
unsigned int idx; int err; |
1da177e4c
|
840 841 |
spin_lock_init(&dummy->mixer_lock); strcpy(card->mixername, "Dummy Mixer"); |
16e434670
|
842 |
dummy->iobox = 1; |
1da177e4c
|
843 844 |
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { |
16e434670
|
845 846 |
kcontrol = snd_ctl_new1(&snd_dummy_controls[idx], dummy); err = snd_ctl_add(card, kcontrol); |
1a11cb642
|
847 |
if (err < 0) |
1da177e4c
|
848 |
return err; |
16e434670
|
849 850 851 852 |
if (!strcmp(kcontrol->id.name, "CD Volume")) dummy->cd_volume_ctl = kcontrol; else if (!strcmp(kcontrol->id.name, "CD Capture Switch")) dummy->cd_switch_ctl = kcontrol; |
1da177e4c
|
853 854 855 |
} return 0; } |
129a4c9f8
|
856 |
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_PROC_FS) |
9b151fec1
|
857 858 859 |
/* * proc interface */ |
d5e1ca05f
|
860 861 |
static void print_formats(struct snd_dummy *dummy, struct snd_info_buffer *buffer) |
9b151fec1
|
862 863 |
{ int i; |
39fac9515
|
864 |
for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { |
d5e1ca05f
|
865 |
if (dummy->pcm_hw.formats & (1ULL << i)) |
9b151fec1
|
866 867 868 |
snd_iprintf(buffer, " %s", snd_pcm_format_name(i)); } } |
d5e1ca05f
|
869 870 |
static void print_rates(struct snd_dummy *dummy, struct snd_info_buffer *buffer) |
9b151fec1
|
871 872 873 874 875 876 |
{ static int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000, 176400, 192000, }; int i; |
d5e1ca05f
|
877 |
if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS) |
9b151fec1
|
878 |
snd_iprintf(buffer, " continuous"); |
d5e1ca05f
|
879 |
if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT) |
9b151fec1
|
880 881 |
snd_iprintf(buffer, " knot"); for (i = 0; i < ARRAY_SIZE(rates); i++) |
d5e1ca05f
|
882 |
if (dummy->pcm_hw.rates & (1 << i)) |
9b151fec1
|
883 884 |
snd_iprintf(buffer, " %d", rates[i]); } |
d5e1ca05f
|
885 886 887 888 |
#define get_dummy_int_ptr(dummy, ofs) \ (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs)) #define get_dummy_ll_ptr(dummy, ofs) \ (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs)) |
9b151fec1
|
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
struct dummy_hw_field { const char *name; const char *format; unsigned int offset; unsigned int size; }; #define FIELD_ENTRY(item, fmt) { \ .name = #item, \ .format = fmt, \ .offset = offsetof(struct snd_pcm_hardware, item), \ .size = sizeof(dummy_pcm_hardware.item) } static struct dummy_hw_field fields[] = { FIELD_ENTRY(formats, "%#llx"), FIELD_ENTRY(rates, "%#x"), FIELD_ENTRY(rate_min, "%d"), FIELD_ENTRY(rate_max, "%d"), FIELD_ENTRY(channels_min, "%d"), FIELD_ENTRY(channels_max, "%d"), FIELD_ENTRY(buffer_bytes_max, "%ld"), FIELD_ENTRY(period_bytes_min, "%ld"), FIELD_ENTRY(period_bytes_max, "%ld"), FIELD_ENTRY(periods_min, "%d"), FIELD_ENTRY(periods_max, "%d"), }; static void dummy_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { |
d5e1ca05f
|
919 |
struct snd_dummy *dummy = entry->private_data; |
9b151fec1
|
920 921 922 923 924 925 |
int i; for (i = 0; i < ARRAY_SIZE(fields); i++) { snd_iprintf(buffer, "%s ", fields[i].name); if (fields[i].size == sizeof(int)) snd_iprintf(buffer, fields[i].format, |
d5e1ca05f
|
926 |
*get_dummy_int_ptr(dummy, fields[i].offset)); |
9b151fec1
|
927 928 |
else snd_iprintf(buffer, fields[i].format, |
d5e1ca05f
|
929 |
*get_dummy_ll_ptr(dummy, fields[i].offset)); |
9b151fec1
|
930 |
if (!strcmp(fields[i].name, "formats")) |
d5e1ca05f
|
931 |
print_formats(dummy, buffer); |
9b151fec1
|
932 |
else if (!strcmp(fields[i].name, "rates")) |
d5e1ca05f
|
933 |
print_rates(dummy, buffer); |
9b151fec1
|
934 935 936 937 938 939 940 941 |
snd_iprintf(buffer, " "); } } static void dummy_proc_write(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { |
d5e1ca05f
|
942 |
struct snd_dummy *dummy = entry->private_data; |
9b151fec1
|
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 |
char line[64]; while (!snd_info_get_line(buffer, line, sizeof(line))) { char item[20]; const char *ptr; unsigned long long val; int i; ptr = snd_info_get_str(item, line, sizeof(item)); for (i = 0; i < ARRAY_SIZE(fields); i++) { if (!strcmp(item, fields[i].name)) break; } if (i >= ARRAY_SIZE(fields)) continue; snd_info_get_str(item, ptr, sizeof(item)); |
b785a492c
|
959 |
if (kstrtoull(item, 0, &val)) |
9b151fec1
|
960 961 |
continue; if (fields[i].size == sizeof(int)) |
d5e1ca05f
|
962 |
*get_dummy_int_ptr(dummy, fields[i].offset) = val; |
9b151fec1
|
963 |
else |
d5e1ca05f
|
964 |
*get_dummy_ll_ptr(dummy, fields[i].offset) = val; |
9b151fec1
|
965 966 |
} } |
fbbb01a12
|
967 |
static void dummy_proc_init(struct snd_dummy *chip) |
9b151fec1
|
968 |
{ |
815d808c7
|
969 970 |
snd_card_rw_proc_new(chip->card, "dummy_pcm", chip, dummy_proc_read, dummy_proc_write); |
9b151fec1
|
971 972 973 |
} #else #define dummy_proc_init(x) |
129a4c9f8
|
974 |
#endif /* CONFIG_SND_DEBUG && CONFIG_SND_PROC_FS */ |
9b151fec1
|
975 |
|
fbbb01a12
|
976 |
static int snd_dummy_probe(struct platform_device *devptr) |
1da177e4c
|
977 |
{ |
4a4d2cfd8
|
978 979 |
struct snd_card *card; struct snd_dummy *dummy; |
d5e1ca05f
|
980 |
struct dummy_model *m = NULL, **mdl; |
1da177e4c
|
981 |
int idx, err; |
6e65c1cc4
|
982 |
int dev = devptr->id; |
1da177e4c
|
983 |
|
5872f3f62
|
984 985 |
err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE, sizeof(struct snd_dummy), &card); |
bd7dd77c2
|
986 987 |
if (err < 0) return err; |
4a4d2cfd8
|
988 |
dummy = card->private_data; |
1da177e4c
|
989 |
dummy->card = card; |
d5e1ca05f
|
990 991 992 993 994 995 996 997 998 999 |
for (mdl = dummy_models; *mdl && model[dev]; mdl++) { if (strcmp(model[dev], (*mdl)->name) == 0) { printk(KERN_INFO "snd-dummy: Using model '%s' for card %i ", (*mdl)->name, card->number); m = dummy->model = *mdl; break; } } |
1da177e4c
|
1000 1001 1002 1003 1004 |
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; |
1a11cb642
|
1005 1006 |
err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]); if (err < 0) |
1da177e4c
|
1007 1008 |
goto __nodev; } |
d5e1ca05f
|
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 |
dummy->pcm_hw = dummy_pcm_hardware; if (m) { if (m->formats) dummy->pcm_hw.formats = m->formats; if (m->buffer_bytes_max) dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max; if (m->period_bytes_min) dummy->pcm_hw.period_bytes_min = m->period_bytes_min; if (m->period_bytes_max) dummy->pcm_hw.period_bytes_max = m->period_bytes_max; if (m->periods_min) dummy->pcm_hw.periods_min = m->periods_min; if (m->periods_max) dummy->pcm_hw.periods_max = m->periods_max; if (m->rates) dummy->pcm_hw.rates = m->rates; if (m->rate_min) dummy->pcm_hw.rate_min = m->rate_min; if (m->rate_max) dummy->pcm_hw.rate_max = m->rate_max; if (m->channels_min) dummy->pcm_hw.channels_min = m->channels_min; if (m->channels_max) dummy->pcm_hw.channels_max = m->channels_max; } |
1a11cb642
|
1035 1036 |
err = snd_card_dummy_new_mixer(dummy); if (err < 0) |
1da177e4c
|
1037 1038 1039 1040 |
goto __nodev; strcpy(card->driver, "Dummy"); strcpy(card->shortname, "Dummy"); sprintf(card->longname, "Dummy %i", dev + 1); |
16dab54b8
|
1041 |
|
9b151fec1
|
1042 |
dummy_proc_init(dummy); |
1a11cb642
|
1043 1044 |
err = snd_card_register(card); if (err == 0) { |
6e65c1cc4
|
1045 |
platform_set_drvdata(devptr, card); |
1da177e4c
|
1046 1047 1048 1049 1050 1051 |
return 0; } __nodev: snd_card_free(card); return err; } |
fbbb01a12
|
1052 |
static int snd_dummy_remove(struct platform_device *devptr) |
6e65c1cc4
|
1053 1054 |
{ snd_card_free(platform_get_drvdata(devptr)); |
6e65c1cc4
|
1055 1056 |
return 0; } |
d34e4e00a
|
1057 |
#ifdef CONFIG_PM_SLEEP |
284e7ca75
|
1058 |
static int snd_dummy_suspend(struct device *pdev) |
1da177e4c
|
1059 |
{ |
284e7ca75
|
1060 |
struct snd_card *card = dev_get_drvdata(pdev); |
1da177e4c
|
1061 |
|
6e65c1cc4
|
1062 |
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
6e65c1cc4
|
1063 1064 1065 |
return 0; } |
284e7ca75
|
1066 |
static int snd_dummy_resume(struct device *pdev) |
6e65c1cc4
|
1067 |
{ |
284e7ca75
|
1068 |
struct snd_card *card = dev_get_drvdata(pdev); |
6e65c1cc4
|
1069 1070 1071 1072 |
snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } |
284e7ca75
|
1073 1074 1075 1076 1077 |
static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume); #define SND_DUMMY_PM_OPS &snd_dummy_pm #else #define SND_DUMMY_PM_OPS NULL |
6e65c1cc4
|
1078 1079 1080 1081 1082 1083 |
#endif #define SND_DUMMY_DRIVER "snd_dummy" static struct platform_driver snd_dummy_driver = { .probe = snd_dummy_probe, |
fbbb01a12
|
1084 |
.remove = snd_dummy_remove, |
6e65c1cc4
|
1085 |
.driver = { |
8bf01d8ab
|
1086 |
.name = SND_DUMMY_DRIVER, |
284e7ca75
|
1087 |
.pm = SND_DUMMY_PM_OPS, |
6e65c1cc4
|
1088 1089 |
}, }; |
c12aad6ef
|
1090 |
static void snd_dummy_unregister_all(void) |
f7a9275d9
|
1091 1092 1093 1094 1095 1096 |
{ int i; for (i = 0; i < ARRAY_SIZE(devices); ++i) platform_device_unregister(devices[i]); platform_driver_unregister(&snd_dummy_driver); |
a68c4d113
|
1097 |
free_fake_buffer(); |
f7a9275d9
|
1098 |
} |
6e65c1cc4
|
1099 1100 1101 |
static int __init alsa_card_dummy_init(void) { int i, cards, err; |
1a11cb642
|
1102 1103 |
err = platform_driver_register(&snd_dummy_driver); if (err < 0) |
6e65c1cc4
|
1104 |
return err; |
a68c4d113
|
1105 1106 1107 1108 1109 |
err = alloc_fake_buffer(); if (err < 0) { platform_driver_unregister(&snd_dummy_driver); return err; } |
6e65c1cc4
|
1110 |
cards = 0; |
8278ca8fe
|
1111 |
for (i = 0; i < SNDRV_CARDS; i++) { |
6e65c1cc4
|
1112 |
struct platform_device *device; |
8278ca8fe
|
1113 1114 |
if (! enable[i]) continue; |
6e65c1cc4
|
1115 1116 |
device = platform_device_register_simple(SND_DUMMY_DRIVER, i, NULL, 0); |
a182ee987
|
1117 1118 |
if (IS_ERR(device)) continue; |
7152447df
|
1119 1120 1121 1122 |
if (!platform_get_drvdata(device)) { platform_device_unregister(device); continue; } |
f7a9275d9
|
1123 |
devices[i] = device; |
1da177e4c
|
1124 1125 1126 1127 1128 1129 1130 |
cards++; } if (!cards) { #ifdef MODULE printk(KERN_ERR "Dummy soundcard not found or device busy "); #endif |
a182ee987
|
1131 1132 |
snd_dummy_unregister_all(); return -ENODEV; |
1da177e4c
|
1133 1134 1135 1136 1137 1138 |
} return 0; } static void __exit alsa_card_dummy_exit(void) { |
f7a9275d9
|
1139 |
snd_dummy_unregister_all(); |
1da177e4c
|
1140 1141 1142 1143 |
} module_init(alsa_card_dummy_init) module_exit(alsa_card_dummy_exit) |