diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
commit | dca2d6ac09d9ef59ff46820d4f0c94b08a671202 (patch) | |
tree | fdec753b842dad09e3a4151954fab3eb5c43500d /sound/drivers/dummy.c | |
parent | d6a65dffb30d8636b1e5d4c201564ef401a246cf (diff) | |
parent | 18240904960a39e582ced8ba8ececb10b8c22dd3 (diff) |
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts:
arch/x86/kernel/process_64.c
Semantic conflict fixed in:
arch/x86/kvm/x86.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'sound/drivers/dummy.c')
-rw-r--r-- | sound/drivers/dummy.c | 700 |
1 files changed, 537 insertions, 163 deletions
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c index 54239d2e099..6ba066c41d2 100644 --- a/sound/drivers/dummy.c +++ b/sound/drivers/dummy.c @@ -25,12 +25,15 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/wait.h> +#include <linux/hrtimer.h> +#include <linux/math64.h> #include <linux/moduleparam.h> #include <sound/core.h> #include <sound/control.h> #include <sound/tlv.h> #include <sound/pcm.h> #include <sound/rawmidi.h> +#include <sound/info.h> #include <sound/initval.h> MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); @@ -39,7 +42,7 @@ MODULE_LICENSE("GPL"); MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); #define MAX_PCM_DEVICES 4 -#define MAX_PCM_SUBSTREAMS 16 +#define MAX_PCM_SUBSTREAMS 128 #define MAX_MIDI_DEVICES 2 #if 0 /* emu10k1 emulation */ @@ -148,6 +151,10 @@ 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}; +#ifdef CONFIG_HIGH_RES_TIMERS +static int hrtimer = 1; +#endif +static int fake_buffer = 1; module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for dummy soundcard."); @@ -161,6 +168,12 @@ 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."); +module_param(fake_buffer, bool, 0444); +MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations."); +#ifdef CONFIG_HIGH_RES_TIMERS +module_param(hrtimer, bool, 0644); +MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source."); +#endif static struct platform_device *devices[SNDRV_CARDS]; @@ -171,137 +184,324 @@ static struct platform_device *devices[SNDRV_CARDS]; #define MIXER_ADDR_CD 4 #define MIXER_ADDR_LAST 4 +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 *); +}; + struct snd_dummy { struct snd_card *card; struct snd_pcm *pcm; spinlock_t mixer_lock; int mixer_volume[MIXER_ADDR_LAST+1][2]; int capture_source[MIXER_ADDR_LAST+1][2]; + const struct dummy_timer_ops *timer_ops; }; -struct snd_dummy_pcm { - struct snd_dummy *dummy; +/* + * system timer interface + */ + +struct dummy_systimer_pcm { spinlock_t lock; struct timer_list timer; - unsigned int pcm_buffer_size; - unsigned int pcm_period_size; - unsigned int pcm_bps; /* bytes per second */ - unsigned int pcm_hz; /* HZ */ - unsigned int pcm_irq_pos; /* IRQ position */ - unsigned int pcm_buf_pos; /* position in buffer */ + unsigned long base_time; + unsigned int frac_pos; /* fractional sample position (based HZ) */ + unsigned int frac_period_rest; + unsigned int frac_buffer_size; /* buffer_size * HZ */ + unsigned int frac_period_size; /* period_size * HZ */ + unsigned int rate; + int elapsed; struct snd_pcm_substream *substream; }; - -static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm) +static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) { - dpcm->timer.expires = 1 + jiffies; + dpcm->timer.expires = jiffies + + (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate; add_timer(&dpcm->timer); } -static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm) +static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) { - del_timer(&dpcm->timer); + unsigned long delta; + + delta = jiffies - dpcm->base_time; + if (!delta) + return; + dpcm->base_time += delta; + delta *= dpcm->rate; + dpcm->frac_pos += delta; + while (dpcm->frac_pos >= dpcm->frac_buffer_size) + dpcm->frac_pos -= dpcm->frac_buffer_size; + while (dpcm->frac_period_rest <= delta) { + dpcm->elapsed++; + dpcm->frac_period_rest += dpcm->frac_period_size; + } + dpcm->frac_period_rest -= delta; } -static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +static int dummy_systimer_start(struct snd_pcm_substream *substream) { - struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_dummy_pcm *dpcm = runtime->private_data; - int err = 0; + struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; + spin_lock(&dpcm->lock); + dpcm->base_time = jiffies; + dummy_systimer_rearm(dpcm); + spin_unlock(&dpcm->lock); + return 0; +} +static int dummy_systimer_stop(struct snd_pcm_substream *substream) +{ + struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; spin_lock(&dpcm->lock); - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - snd_card_dummy_pcm_timer_start(dpcm); - break; - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - snd_card_dummy_pcm_timer_stop(dpcm); - break; - default: - err = -EINVAL; - break; - } + del_timer(&dpcm->timer); spin_unlock(&dpcm->lock); return 0; } -static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream) +static int dummy_systimer_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_dummy_pcm *dpcm = runtime->private_data; - int bps; - - bps = snd_pcm_format_width(runtime->format) * runtime->rate * - runtime->channels / 8; - - if (bps <= 0) - return -EINVAL; - - dpcm->pcm_bps = bps; - dpcm->pcm_hz = HZ; - dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream); - dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream); - dpcm->pcm_irq_pos = 0; - dpcm->pcm_buf_pos = 0; + struct dummy_systimer_pcm *dpcm = runtime->private_data; - snd_pcm_format_set_silence(runtime->format, runtime->dma_area, - bytes_to_samples(runtime, runtime->dma_bytes)); + dpcm->frac_pos = 0; + dpcm->rate = runtime->rate; + dpcm->frac_buffer_size = runtime->buffer_size * HZ; + dpcm->frac_period_size = runtime->period_size * HZ; + dpcm->frac_period_rest = dpcm->frac_period_size; + dpcm->elapsed = 0; return 0; } -static void snd_card_dummy_pcm_timer_function(unsigned long data) +static void dummy_systimer_callback(unsigned long data) { - struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data; + struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data; unsigned long flags; + int elapsed = 0; spin_lock_irqsave(&dpcm->lock, flags); - dpcm->timer.expires = 1 + jiffies; - add_timer(&dpcm->timer); - dpcm->pcm_irq_pos += dpcm->pcm_bps; - dpcm->pcm_buf_pos += dpcm->pcm_bps; - dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz; - if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) { - dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz; - spin_unlock_irqrestore(&dpcm->lock, flags); + dummy_systimer_update(dpcm); + dummy_systimer_rearm(dpcm); + elapsed = dpcm->elapsed; + dpcm->elapsed = 0; + spin_unlock_irqrestore(&dpcm->lock, flags); + if (elapsed) + snd_pcm_period_elapsed(dpcm->substream); +} + +static snd_pcm_uframes_t +dummy_systimer_pointer(struct snd_pcm_substream *substream) +{ + struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; + snd_pcm_uframes_t pos; + + spin_lock(&dpcm->lock); + dummy_systimer_update(dpcm); + pos = dpcm->frac_pos / HZ; + spin_unlock(&dpcm->lock); + return pos; +} + +static int dummy_systimer_create(struct snd_pcm_substream *substream) +{ + struct dummy_systimer_pcm *dpcm; + + dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); + if (!dpcm) + return -ENOMEM; + substream->runtime->private_data = dpcm; + init_timer(&dpcm->timer); + dpcm->timer.data = (unsigned long) dpcm; + dpcm->timer.function = dummy_systimer_callback; + 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); +} + +static struct dummy_timer_ops dummy_systimer_ops = { + .create = dummy_systimer_create, + .free = dummy_systimer_free, + .prepare = dummy_systimer_prepare, + .start = dummy_systimer_start, + .stop = dummy_systimer_stop, + .pointer = dummy_systimer_pointer, +}; + +#ifdef CONFIG_HIGH_RES_TIMERS +/* + * hrtimer interface + */ + +struct dummy_hrtimer_pcm { + ktime_t base_time; + ktime_t period_time; + atomic_t running; + struct hrtimer timer; + struct tasklet_struct tasklet; + struct snd_pcm_substream *substream; +}; + +static void dummy_hrtimer_pcm_elapsed(unsigned long priv) +{ + struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv; + if (atomic_read(&dpcm->running)) snd_pcm_period_elapsed(dpcm->substream); - } else - spin_unlock_irqrestore(&dpcm->lock, flags); } -static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream) +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; + tasklet_schedule(&dpcm->tasklet); + 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); + hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL); + 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); + hrtimer_cancel(&dpcm->timer); + return 0; +} + +static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) +{ + tasklet_kill(&dpcm->tasklet); +} + +static snd_pcm_uframes_t +dummy_hrtimer_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_dummy_pcm *dpcm = runtime->private_data; + 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; +} - return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz); +static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) +{ + 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 struct snd_pcm_hardware snd_card_dummy_playback = +static int dummy_hrtimer_create(struct snd_pcm_substream *substream) { - .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_RESUME | 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_PERIOD_SIZE, - .periods_min = USE_PERIODS_MIN, - .periods_max = USE_PERIODS_MAX, - .fifo_size = 0, + struct dummy_hrtimer_pcm *dpcm; + + dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); + if (!dpcm) + return -ENOMEM; + substream->runtime->private_data = dpcm; + hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + dpcm->timer.function = dummy_hrtimer_callback; + dpcm->substream = substream; + atomic_set(&dpcm->running, 0); + tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed, + (unsigned long)dpcm); + 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); +} + +static struct dummy_timer_ops dummy_hrtimer_ops = { + .create = dummy_hrtimer_create, + .free = dummy_hrtimer_free, + .prepare = dummy_hrtimer_prepare, + .start = dummy_hrtimer_start, + .stop = dummy_hrtimer_stop, + .pointer = dummy_hrtimer_pointer, }; -static struct snd_pcm_hardware snd_card_dummy_capture = +#endif /* CONFIG_HIGH_RES_TIMERS */ + +/* + * PCM interface + */ + +static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { - .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), + struct snd_dummy *dummy = snd_pcm_substream_chip(substream); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + return dummy->timer_ops->start(substream); + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + return dummy->timer_ops->stop(substream); + } + return -EINVAL; +} + +static int dummy_pcm_prepare(struct snd_pcm_substream *substream) +{ + struct snd_dummy *dummy = snd_pcm_substream_chip(substream); + + return dummy->timer_ops->prepare(substream); +} + +static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_dummy *dummy = snd_pcm_substream_chip(substream); + + return dummy->timer_ops->pointer(substream); +} + +static struct snd_pcm_hardware dummy_pcm_hardware = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_MMAP_VALID), .formats = USE_FORMATS, .rates = USE_RATE, .rate_min = USE_RATE_MIN, @@ -316,123 +516,152 @@ static struct snd_pcm_hardware snd_card_dummy_capture = .fifo_size = 0, }; -static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime) -{ - kfree(runtime->private_data); -} - -static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) +static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) { - return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); + 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; + } + return snd_pcm_lib_malloc_pages(substream, + params_buffer_bytes(hw_params)); } -static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream) +static int dummy_pcm_hw_free(struct snd_pcm_substream *substream) { + if (fake_buffer) + return 0; return snd_pcm_lib_free_pages(substream); } -static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream) -{ - struct snd_dummy_pcm *dpcm; - - dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); - if (! dpcm) - return dpcm; - 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; - return dpcm; -} - -static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream) +static int dummy_pcm_open(struct snd_pcm_substream *substream) { + struct snd_dummy *dummy = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_dummy_pcm *dpcm; int err; - if ((dpcm = new_pcm_stream(substream)) == NULL) - return -ENOMEM; - runtime->private_data = dpcm; - /* makes the infrastructure responsible for freeing dpcm */ - runtime->private_free = snd_card_dummy_runtime_free; - runtime->hw = snd_card_dummy_playback; + dummy->timer_ops = &dummy_systimer_ops; +#ifdef CONFIG_HIGH_RES_TIMERS + if (hrtimer) + dummy->timer_ops = &dummy_hrtimer_ops; +#endif + + err = dummy->timer_ops->create(substream); + if (err < 0) + return err; + + runtime->hw = dummy_pcm_hardware; 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); - err = add_playback_constraints(runtime); - if (err < 0) + runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + err = add_playback_constraints(substream->runtime); + else + err = add_capture_constraints(substream->runtime); + if (err < 0) { + dummy->timer_ops->free(substream); return err; - + } return 0; } -static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) +static int dummy_pcm_close(struct snd_pcm_substream *substream) { - struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_dummy_pcm *dpcm; - int err; + struct snd_dummy *dummy = snd_pcm_substream_chip(substream); + dummy->timer_ops->free(substream); + return 0; +} - if ((dpcm = new_pcm_stream(substream)) == NULL) - return -ENOMEM; - runtime->private_data = dpcm; - /* makes the infrastructure responsible for freeing 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; +/* + * 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; + } } - if (substream->pcm->device & 2) - runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); - err = add_capture_constraints(runtime); - if (err < 0) - return err; +} +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 snd_card_dummy_playback_close(struct snd_pcm_substream *substream) +static int dummy_pcm_copy(struct snd_pcm_substream *substream, + int channel, snd_pcm_uframes_t pos, + void __user *dst, snd_pcm_uframes_t count) { - return 0; + return 0; /* do nothing */ } -static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream) +static int dummy_pcm_silence(struct snd_pcm_substream *substream, + int channel, snd_pcm_uframes_t pos, + snd_pcm_uframes_t count) { - return 0; + 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 */ } -static struct snd_pcm_ops 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_pcm_prepare, - .trigger = snd_card_dummy_pcm_trigger, - .pointer = snd_card_dummy_pcm_pointer, +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, }; -static struct snd_pcm_ops 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_pcm_prepare, - .trigger = snd_card_dummy_pcm_trigger, - .pointer = snd_card_dummy_pcm_pointer, +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, + .copy = dummy_pcm_copy, + .silence = dummy_pcm_silence, + .page = dummy_pcm_page, }; static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams) { struct snd_pcm *pcm; + struct snd_pcm_ops *ops; int err; err = snd_pcm_new(dummy->card, "Dummy PCM", device, @@ -440,17 +669,28 @@ static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, if (err < 0) return err; dummy->pcm = pcm; - 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); + 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); 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); + if (!fake_buffer) { + snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + 0, 64*1024); + } return 0; } +/* + * mixer interface + */ + #define DUMMY_VOLUME(xname, xindex, addr) \ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ @@ -581,6 +821,131 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) return 0; } +#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS) +/* + * proc interface + */ +static void print_formats(struct snd_info_buffer *buffer) +{ + int i; + + for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { + if (dummy_pcm_hardware.formats & (1ULL << i)) + snd_iprintf(buffer, " %s", snd_pcm_format_name(i)); + } +} + +static void print_rates(struct snd_info_buffer *buffer) +{ + static int rates[] = { + 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, + 64000, 88200, 96000, 176400, 192000, + }; + int i; + + if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_CONTINUOUS) + snd_iprintf(buffer, " continuous"); + if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_KNOT) + snd_iprintf(buffer, " knot"); + for (i = 0; i < ARRAY_SIZE(rates); i++) + if (dummy_pcm_hardware.rates & (1 << i)) + snd_iprintf(buffer, " %d", rates[i]); +} + +#define get_dummy_int_ptr(ofs) \ + (unsigned int *)((char *)&dummy_pcm_hardware + (ofs)) +#define get_dummy_ll_ptr(ofs) \ + (unsigned long long *)((char *)&dummy_pcm_hardware + (ofs)) + +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) +{ + 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, + *get_dummy_int_ptr(fields[i].offset)); + else + snd_iprintf(buffer, fields[i].format, + *get_dummy_ll_ptr(fields[i].offset)); + if (!strcmp(fields[i].name, "formats")) + print_formats(buffer); + else if (!strcmp(fields[i].name, "rates")) + print_rates(buffer); + snd_iprintf(buffer, "\n"); + } +} + +static void dummy_proc_write(struct snd_info_entry *entry, + struct snd_info_buffer *buffer) +{ + 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)); + if (strict_strtoull(item, 0, &val)) + continue; + if (fields[i].size == sizeof(int)) + *get_dummy_int_ptr(fields[i].offset) = val; + else + *get_dummy_ll_ptr(fields[i].offset) = val; + } +} + +static void __devinit dummy_proc_init(struct snd_dummy *chip) +{ + struct snd_info_entry *entry; + + if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) { + snd_info_set_text_ops(entry, chip, dummy_proc_read); + entry->c.text.write = dummy_proc_write; + entry->mode |= S_IWUSR; + } +} +#else +#define dummy_proc_init(x) +#endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */ + static int __devinit snd_dummy_probe(struct platform_device *devptr) { struct snd_card *card; @@ -610,6 +975,8 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr) strcpy(card->shortname, "Dummy"); sprintf(card->longname, "Dummy %i", dev + 1); + dummy_proc_init(dummy); + snd_card_set_dev(card, &devptr->dev); err = snd_card_register(card); @@ -670,6 +1037,7 @@ static void snd_dummy_unregister_all(void) for (i = 0; i < ARRAY_SIZE(devices); ++i) platform_device_unregister(devices[i]); platform_driver_unregister(&snd_dummy_driver); + free_fake_buffer(); } static int __init alsa_card_dummy_init(void) @@ -680,6 +1048,12 @@ static int __init alsa_card_dummy_init(void) if (err < 0) return err; + err = alloc_fake_buffer(); + if (err < 0) { + platform_driver_unregister(&snd_dummy_driver); + return err; + } + cards = 0; for (i = 0; i < SNDRV_CARDS; i++) { struct platform_device *device; |