*
*/
-#include <sound/driver.h> //giova
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#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/rawmidi.h>
#include <sound/initval.h>
-
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
MODULE_LICENSE("GPL");
/* defaults */
#ifndef MAX_BUFFER_SIZE
-#define MAX_BUFFER_SIZE (64*1024)
+#define MAX_BUFFER_SIZE 1024
#endif
#ifndef MAX_PERIOD_SIZE
-#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
+#define MAX_PERIOD_SIZE 512
#endif
#ifndef USE_FORMATS
#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 128};
//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.");
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 # (1-64) for dummy driver.");
+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];
-static struct timer_list giovatimer; //giova
-static int giovastarted=0;
-static int giovaindex=0;
-static spinlock_t giovalock;
-struct giovadpcm {
- struct snd_pcm_substream *substream;
- struct snd_dummy_pcm *dpcm;
- int started;
-};
-static struct giovadpcm giovadpcms[MAX_PCM_SUBSTREAMS];
#define MIXER_ADDR_MASTER 0
#define MIXER_ADDR_LINE 1
#define MIXER_ADDR_CD 4
#define MIXER_ADDR_LAST 4
-static void snd_card_dummy_pcm_timer_function(unsigned long data);
+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)
{
-int i;
-int found=0;
-
+ dpcm->timer.expires = jiffies +
+ (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate;
+ add_timer(&dpcm->timer);
+}
-//printk("giova: 1 timer_start %d %p\n", __LINE__, dpcm);
-for(i=0; i<giovaindex+1; i++){
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, i, giovaindex, dpcm);
+static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
+{
+ 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;
+}
-if(giovadpcms[i].dpcm == dpcm){
- giovadpcms[i].started=1;
- found=1;
+static int dummy_systimer_start(struct snd_pcm_substream *substream)
+{
+ 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);
+ del_timer(&dpcm->timer);
+ spin_unlock(&dpcm->lock);
+ return 0;
}
-if(!found){
- printk("skypiax: start, NOT found?\n");
+
+static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct dummy_systimer_pcm *dpcm = runtime->private_data;
+
+ 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 dummy_systimer_callback(unsigned long data)
+{
+ struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
+ unsigned long flags;
+ int elapsed = 0;
+
+ spin_lock_irqsave(&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;
-//printk("giova: 2 timer_start %d %p\n", __LINE__, dpcm);
+ spin_lock(&dpcm->lock);
+ dummy_systimer_update(dpcm);
+ pos = dpcm->frac_pos / HZ;
+ spin_unlock(&dpcm->lock);
+ return pos;
}
-static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
+static int dummy_systimer_create(struct snd_pcm_substream *substream)
{
- //del_timer(&dpcm->timer);
-int i;
-int found=0;
+ struct dummy_systimer_pcm *dpcm;
-//printk("giova: 1 timer_stop %d %p\n", __LINE__, dpcm);
-for(i=0; i<giovaindex +1; i++){
+ 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;
+}
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, i, giovaindex, dpcm);
- }
-if(giovadpcms[i].dpcm == dpcm){
- giovadpcms[i].started=0;
- found=1;
+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);
}
-if(!found){
- //printk("skypiax: stop, NOT found?\n");
- } else {
- //printk("skypiax: stop, YES found!\n");
- }
+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;
-//printk("giova: 2 timer_stop %d %p\n", __LINE__, dpcm);
+ 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 snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+static int dummy_hrtimer_stop(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_hrtimer_pcm *dpcm = substream->runtime->private_data;
- //spin_lock(&dpcm->lock, flags);
- spin_lock_bh(&giovalock);
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
-//printk("giova: trigger timer_start %d %p\n", __LINE__, dpcm);
- snd_card_dummy_pcm_timer_start(dpcm);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
-//printk("giova: trigger timer_stop %d %p\n", __LINE__, dpcm);
- snd_card_dummy_pcm_timer_stop(dpcm);
- break;
- default:
- err = -EINVAL;
- break;
- }
- //spin_unlock(&dpcm->lock, flags);
- spin_unlock_bh(&giovalock);
+ atomic_set(&dpcm->running, 0);
+ hrtimer_cancel(&dpcm->timer);
return 0;
}
-static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
+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;
- int bps;
+ 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;
+}
- bps = snd_pcm_format_width(runtime->format) * runtime->rate *
- runtime->channels / 8;
+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);
- if (bps <= 0)
- return -EINVAL;
+ return 0;
+}
- 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;
- snd_pcm_format_set_silence(runtime->format, runtime->dma_area,
- bytes_to_samples(runtime, runtime->dma_bytes));
+static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
+{
+ struct dummy_hrtimer_pcm *dpcm;
-//printk("giova: prepare %d %p\n", __LINE__, 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 snd_card_dummy_pcm_timer_function(unsigned long data)
+static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
{
- //struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
- struct snd_dummy_pcm *dpcm=NULL;
- //unsigned long flags;
-int i;
-
+ 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,
+};
- giovatimer.expires = (HZ/100) + jiffies;
- add_timer(&giovatimer);
+#endif /* CONFIG_HIGH_RES_TIMERS */
-for(i=0; i< giovaindex +1; i++) {
+/*
+ * PCM interface
+ */
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, i, giovaindex, dpcm);
- }
-//printk("giova: timer_func %d i=%d\n", __LINE__, i);
-
-if(giovadpcms[i].started != 1)
- continue;
-dpcm = giovadpcms[i].dpcm;
-if(dpcm==NULL){
- printk("giova: timer_func %d %d NULL: continue\n", __LINE__, i);
- continue;
- }
- if(in_irq())
- printk("giova: timer_func %d %d we are in HARDWARE IRQ\n", __LINE__, i);
- //if(in_softirq())
- //printk("giova: timer_func %d %d we are in SOFT IRQ\n", __LINE__, i);
-//printk("giova: timer_func %d %d\n", __LINE__, i);
- //spin_lock_irqsave(&dpcm->lock, flags);
- spin_lock_bh(&dpcm->lock);
- dpcm->pcm_irq_pos += dpcm->pcm_bps * (HZ/100);
- dpcm->pcm_buf_pos += dpcm->pcm_bps * (HZ/100);
- 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);
- spin_unlock_bh(&dpcm->lock);
- snd_pcm_period_elapsed(dpcm->substream);
- } else {
- //spin_unlock_irqrestore(&dpcm->lock, flags);
- spin_unlock_bh(&dpcm->lock);
+static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ 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 snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
+static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm = runtime->private_data;
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
-//printk("giova: pointer %d %p\n", __LINE__, dpcm);
- //return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz);
- return (dpcm->pcm_buf_pos / dpcm->pcm_hz)/2;
+ return dummy->timer_ops->prepare(substream);
}
-static struct snd_pcm_hardware snd_card_dummy_playback =
+static snd_pcm_uframes_t dummy_pcm_pointer(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 snd_dummy *dummy = snd_pcm_substream_chip(substream);
-static struct snd_pcm_hardware snd_card_dummy_capture =
-{
- .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
+ 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,
.fifo_size = 0,
};
-static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
+static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
{
-int i;
-//int found=0;
-
-//printk("snd_card_dummy_runtime_free giova 1 giovaindex=%d dpcm=%p runtime=%p\n", giovaindex, runtime->private_data, runtime);
- spin_lock_bh(&giovalock);
-
-for(i=0; i < giovaindex; i++) {
-
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d \n", __FILE__, __LINE__, i, giovaindex);
- }
- //if((giovadpcms[i].substream == substream) && (giovadpcms[i].dpcm == dpcm)){
- if((giovadpcms[i].dpcm == runtime->private_data)){
- //printk("giova, %s:%d, i=%d, giovaindex=%d %p==%p YES I AM!!!!\n", __FILE__, __LINE__, i, giovaindex, giovadpcms[i].dpcm , runtime->private_data);
- //giovadpcms[i].dpcm = NULL;
- //giovadpcms[i].substream = NULL;
- giovadpcms[i].started = 0;
- //break;
- } else {
- //printk("giova, %s:%d, i=%d, giovaindex=%d %p!=%p NOT ME\n", __FILE__, __LINE__, i, giovaindex, giovadpcms[i].dpcm , runtime->private_data);
+ 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));
}
- spin_unlock_bh(&giovalock);
- kfree(runtime->private_data);
-}
-
-static int snd_card_dummy_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));
-}
-
-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;
- int i;
- int found=0;
-
- //printk("giova, %s:%d, i=%d, giovaindex=%d %p==%p YES I AM!!!!\n", __FILE__, __LINE__, i, giovaindex, giovadpcms[i].dpcm , runtime->private_data);
- //printk("giova, %s:%d, giovaindex=%d\n", __FILE__, __LINE__, giovaindex);
- dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
- //printk("giova, %s:%d, giovaindex=%d\n", __FILE__, __LINE__, giovaindex);
- if (! dpcm){
- //spin_unlock_bh(&giovalock);
- printk("giova, %s:%d, giovaindex=%d NO MEMORY!!!!\n", __FILE__, __LINE__, giovaindex);
- return dpcm;
- }
- //printk("giova, %s:%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, giovaindex, 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;
-
- spin_lock_bh(&giovalock);
- //printk("giova 1 giovaindex=%d dpcm=%p substream=%p sizeof=%lu\n", giovaindex, dpcm, substream, sizeof(*dpcm));
- for(i=0; i < giovaindex; i++) {
-
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, i, giovaindex, dpcm);
- }
- //if((giovadpcms[i].substream == substream) && (giovadpcms[i].dpcm == dpcm))
- if((giovadpcms[i].substream == substream)){
- found=1;
- break;
- }
-
- }
-
- if(!found){
-
- giovadpcms[giovaindex].substream=substream;
- giovaindex++;
- //printk("giova 2 giovaindex=%d dpcm=%p substream=%p\n", giovaindex, dpcm, substream);
- }
-
-
-
- found =0;
- for(i=0; i < giovaindex; i++) {
-
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, i, giovaindex, dpcm);
- }
- if(giovadpcms[i].substream == substream){
- giovadpcms[i].dpcm=dpcm;
- giovadpcms[i].started=0;
- found = 1;
- //printk("giova 3 giovaindex=%d dpcm=%p substream=%p\n", giovaindex, dpcm, substream);
- break;
- }
-
- }
-
- spin_unlock_bh(&giovalock);
- if(!found) {
- printk("skypiax giovaindex=%d NOT found????\n", giovaindex);
- }
-
- //printk("giova, %s:%d, giovaindex=%d\n", __FILE__, __LINE__, giovaindex);
- 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;
- //printk("giova, %s:%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, giovaindex, dpcm);
- 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;
- //printk("giova, %s:%d, giovaindex=%d dpcm=%p\n", __FILE__, __LINE__, giovaindex, dpcm);
- 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)
{
-//printk("play giova 1 giovaindex=%d dpcm=%p substream=%p\n", giovaindex, substream->private_data, substream);
- snd_card_dummy_pcm_timer_stop(substream->private_data);
- 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)
{
-//printk("capt giova 2 giovaindex=%d dpcm=%p substream=%p\n", giovaindex, substream->private_data, substream);
- snd_card_dummy_pcm_timer_stop(substream->private_data);
- return 0;
+ return 0; /* do nothing */
}
-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 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 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,
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),
- 128*1024, 1024*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;
}
{
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int addr = kcontrol->private_value;
- //unsigned long flags;
-
- if(in_irq())
- printk("giova: line %d we are in HARDWARE IRQ\n", __LINE__);
-//printk("giova: volume get %d %d\n", __LINE__, addr);
- //spin_lock_irq(&dummy->mixer_lock);
- //spin_lock_irqsave(&dummy->mixer_lock, flags);
- spin_lock_bh(&dummy->mixer_lock);
+
+ spin_lock_irq(&dummy->mixer_lock);
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);
- spin_unlock_bh(&dummy->mixer_lock);
+ spin_unlock_irq(&dummy->mixer_lock);
return 0;
}
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int change, addr = kcontrol->private_value;
int left, right;
- //unsigned long flags;
- if(in_irq())
- printk("giova: line %d we are in HARDWARE IRQ\n", __LINE__);
left = ucontrol->value.integer.value[0];
if (left < -50)
left = -50;
right = -50;
if (right > 100)
right = 100;
-//printk("giova: volume put %d %d\n", __LINE__, addr);
- //spin_lock_irq(&dummy->mixer_lock);
- //spin_lock_irqsave(&dummy->mixer_lock, flags);
- spin_lock_bh(&dummy->mixer_lock);
+ spin_lock_irq(&dummy->mixer_lock);
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_irq(&dummy->mixer_lock);
- //spin_unlock_irqrestore(&dummy->mixer_lock, flags);
- spin_unlock_bh(&dummy->mixer_lock);
+ spin_unlock_irq(&dummy->mixer_lock);
return change;
}
{
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int addr = kcontrol->private_value;
- //unsigned long flags;
- if(in_irq())
- printk("giova: line %d we are in HARDWARE IRQ\n", __LINE__);
- //spin_lock_irq(&dummy->mixer_lock);
- //spin_lock_irqsave(&dummy->mixer_lock, flags);
- spin_lock_bh(&dummy->mixer_lock);
+ spin_lock_irq(&dummy->mixer_lock);
ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
- //spin_unlock_irq(&dummy->mixer_lock);
- //spin_unlock_irqrestore(&dummy->mixer_lock, flags);
- spin_unlock_bh(&dummy->mixer_lock);
-//printk("giova: capsrc_get %d %d\n", __LINE__, addr);
+ spin_unlock_irq(&dummy->mixer_lock);
return 0;
}
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int change, addr = kcontrol->private_value;
int left, right;
- //unsigned long flags;
- if(in_irq())
- printk("giova: line %d we are in HARDWARE IRQ\n", __LINE__);
left = ucontrol->value.integer.value[0] & 1;
right = ucontrol->value.integer.value[1] & 1;
- //spin_lock_irq(&dummy->mixer_lock);
- //spin_lock_irqsave(&dummy->mixer_lock, flags);
- spin_lock_bh(&dummy->mixer_lock);
+ spin_lock_irq(&dummy->mixer_lock);
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_irq(&dummy->mixer_lock);
- //spin_unlock_irqrestore(&dummy->mixer_lock, flags);
- spin_unlock_bh(&dummy->mixer_lock);
-//printk("giova: capsrc_put %d %d\n", __LINE__, addr);
+ spin_unlock_irq(&dummy->mixer_lock);
return change;
}
unsigned int idx;
int err;
- //giova if (snd_BUG_ON(!dummy))
- //giova return -EINVAL;
+ if (snd_BUG_ON(!dummy))
+ return -EINVAL;
spin_lock_init(&dummy->mixer_lock);
strcpy(card->mixername, "Dummy Mixer");
-//printk("giova: new_mixer %d\n", __LINE__);
- return 0; //giova no mixer
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
int idx, err;
int dev = devptr->id;
- card = snd_card_new(index[dev], id[dev], THIS_MODULE,
- sizeof(struct snd_dummy));
- if (card == NULL)
- return -ENOMEM;
-
- //giova err = snd_card_create(index[dev], id[dev], THIS_MODULE,
- //giova sizeof(struct snd_dummy), &card);
- //giova if (err < 0)
- //giova return err;
+ err = snd_card_create(index[dev], id[dev], THIS_MODULE,
+ sizeof(struct snd_dummy), &card);
+ if (err < 0)
+ return err;
dummy = card->private_data;
dummy->card = card;
for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
static int __devexit snd_dummy_remove(struct platform_device *devptr)
{
-
- del_timer(&giovatimer);
snd_card_free(platform_get_drvdata(devptr));
platform_set_drvdata(devptr, NULL);
return 0;
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)
if (err < 0)
return err;
-if(!giovastarted){
-giovastarted=1;
- spin_lock_init(&giovalock);
-
- spin_lock_bh(&giovalock);
-for(i=0; i<MAX_PCM_SUBSTREAMS;i++){
-
- if(i > MAX_PCM_SUBSTREAMS || giovaindex > MAX_PCM_SUBSTREAMS){
- printk("giova, %s:%d, i=%d, giovaindex=%d \n", __FILE__, __LINE__, i, giovaindex);
+ err = alloc_fake_buffer();
+ if (err < 0) {
+ platform_driver_unregister(&snd_dummy_driver);
+ return err;
}
-giovadpcms[i].substream=NULL;
-giovadpcms[i].dpcm=NULL;
-giovadpcms[i].started=0;
-}
- init_timer(&giovatimer);
- //giovatimer.data = (unsigned long) dpcm;
- giovatimer.data = (unsigned long) &giovadpcms;
- giovatimer.function = snd_card_dummy_pcm_timer_function;
- giovatimer.expires = (HZ/100) + jiffies;
- add_timer(&giovatimer);
-printk("snd-dummy skypiax driver, %s:%d working on a machine with %dHZ kernel\n", __FILE__, __LINE__, HZ);
- spin_unlock_bh(&giovalock);
-}
-
cards = 0;
for (i = 0; i < SNDRV_CARDS; i++) {
static void __exit alsa_card_dummy_exit(void)
{
- del_timer(&giovatimer);
snd_dummy_unregister_all();
}
projects / thirdparty / freeswitch.git / commitdiff
