linux/drivers/media/video/tlg2300/pd-alsa.c

333 lines
7.8 KiB
C

#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/init.h>
#include <linux/sound.h>
#include <linux/spinlock.h>
#include <linux/soundcard.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
#include <linux/module.h>
#include <linux/gfp.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/initval.h>
#include <sound/control.h>
#include <media/v4l2-common.h>
#include "pd-common.h"
#include "vendorcmds.h"
static void complete_handler_audio(struct urb *urb);
#define AUDIO_EP (0x83)
#define AUDIO_BUF_SIZE (512)
#define PERIOD_SIZE (1024 * 8)
#define PERIOD_MIN (4)
#define PERIOD_MAX PERIOD_MIN
static struct snd_pcm_hardware snd_pd_hw_capture = {
.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = PERIOD_SIZE * PERIOD_MIN,
.period_bytes_min = PERIOD_SIZE,
.period_bytes_max = PERIOD_SIZE,
.periods_min = PERIOD_MIN,
.periods_max = PERIOD_MAX,
/*
.buffer_bytes_max = 62720 * 8,
.period_bytes_min = 64,
.period_bytes_max = 12544,
.periods_min = 2,
.periods_max = 98
*/
};
static int snd_pd_capture_open(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
struct snd_pcm_runtime *runtime = substream->runtime;
if (!p)
return -ENODEV;
pa->users++;
pa->card_close = 0;
pa->capture_pcm_substream = substream;
runtime->private_data = p;
runtime->hw = snd_pd_hw_capture;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
usb_autopm_get_interface(p->interface);
kref_get(&p->kref);
return 0;
}
static int snd_pd_pcm_close(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
pa->users--;
pa->card_close = 1;
usb_autopm_put_interface(p->interface);
kref_put(&p->kref, poseidon_delete);
return 0;
}
static int snd_pd_hw_capture_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int size;
size = params_buffer_bytes(hw_params);
if (runtime->dma_area) {
if (runtime->dma_bytes > size)
return 0;
vfree(runtime->dma_area);
}
runtime->dma_area = vmalloc(size);
if (!runtime->dma_area)
return -ENOMEM;
else
runtime->dma_bytes = size;
return 0;
}
static int audio_buf_free(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
int i;
for (i = 0; i < AUDIO_BUFS; i++)
if (pa->urb_array[i])
usb_kill_urb(pa->urb_array[i]);
free_all_urb_generic(pa->urb_array, AUDIO_BUFS);
logpm();
return 0;
}
static int snd_pd_hw_capture_free(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
logpm();
audio_buf_free(p);
return 0;
}
static int snd_pd_prepare(struct snd_pcm_substream *substream)
{
return 0;
}
#define AUDIO_TRAILER_SIZE (16)
static inline void handle_audio_data(struct urb *urb, int *period_elapsed)
{
struct poseidon_audio *pa = urb->context;
struct snd_pcm_runtime *runtime = pa->capture_pcm_substream->runtime;
int stride = runtime->frame_bits >> 3;
int len = urb->actual_length / stride;
unsigned char *cp = urb->transfer_buffer;
unsigned int oldptr = pa->rcv_position;
if (urb->actual_length == AUDIO_BUF_SIZE - 4)
len -= (AUDIO_TRAILER_SIZE / stride);
/* do the copy */
if (oldptr + len >= runtime->buffer_size) {
unsigned int cnt = runtime->buffer_size - oldptr;
memcpy(runtime->dma_area + oldptr * stride, cp, cnt * stride);
memcpy(runtime->dma_area, (cp + cnt * stride),
(len * stride - cnt * stride));
} else
memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
/* update the statas */
snd_pcm_stream_lock(pa->capture_pcm_substream);
pa->rcv_position += len;
if (pa->rcv_position >= runtime->buffer_size)
pa->rcv_position -= runtime->buffer_size;
pa->copied_position += (len);
if (pa->copied_position >= runtime->period_size) {
pa->copied_position -= runtime->period_size;
*period_elapsed = 1;
}
snd_pcm_stream_unlock(pa->capture_pcm_substream);
}
static void complete_handler_audio(struct urb *urb)
{
struct poseidon_audio *pa = urb->context;
struct snd_pcm_substream *substream = pa->capture_pcm_substream;
int period_elapsed = 0;
int ret;
if (1 == pa->card_close || pa->capture_stream != STREAM_ON)
return;
if (urb->status != 0) {
/*if (urb->status == -ESHUTDOWN)*/
return;
}
if (substream) {
if (urb->actual_length) {
handle_audio_data(urb, &period_elapsed);
if (period_elapsed)
snd_pcm_period_elapsed(substream);
}
}
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0)
log("audio urb failed (errcod = %i)", ret);
return;
}
static int fire_audio_urb(struct poseidon *p)
{
int i, ret = 0;
struct poseidon_audio *pa = &p->audio;
alloc_bulk_urbs_generic(pa->urb_array, AUDIO_BUFS,
p->udev, AUDIO_EP,
AUDIO_BUF_SIZE, GFP_ATOMIC,
complete_handler_audio, pa);
for (i = 0; i < AUDIO_BUFS; i++) {
ret = usb_submit_urb(pa->urb_array[i], GFP_KERNEL);
if (ret)
log("urb err : %d", ret);
}
log();
return ret;
}
static int snd_pd_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
if (debug_mode)
log("cmd %d, audio stat : %d\n", cmd, pa->capture_stream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_START:
if (pa->capture_stream == STREAM_ON)
return 0;
pa->rcv_position = pa->copied_position = 0;
pa->capture_stream = STREAM_ON;
if (in_hibernation(p))
return 0;
fire_audio_urb(p);
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
pa->capture_stream = STREAM_SUSPEND;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
pa->capture_stream = STREAM_OFF;
return 0;
default:
return -EINVAL;
}
}
static snd_pcm_uframes_t
snd_pd_capture_pointer(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
return pa->rcv_position;
}
static struct page *snd_pcm_pd_get_page(struct snd_pcm_substream *subs,
unsigned long offset)
{
void *pageptr = subs->runtime->dma_area + offset;
return vmalloc_to_page(pageptr);
}
static struct snd_pcm_ops pcm_capture_ops = {
.open = snd_pd_capture_open,
.close = snd_pd_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_pd_hw_capture_params,
.hw_free = snd_pd_hw_capture_free,
.prepare = snd_pd_prepare,
.trigger = snd_pd_capture_trigger,
.pointer = snd_pd_capture_pointer,
.page = snd_pcm_pd_get_page,
};
#ifdef CONFIG_PM
int pm_alsa_suspend(struct poseidon *p)
{
logpm(p);
audio_buf_free(p);
return 0;
}
int pm_alsa_resume(struct poseidon *p)
{
logpm(p);
fire_audio_urb(p);
return 0;
}
#endif
int poseidon_audio_init(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
struct snd_card *card;
struct snd_pcm *pcm;
int ret;
ret = snd_card_create(-1, "Telegent", THIS_MODULE, 0, &card);
if (ret != 0)
return ret;
ret = snd_pcm_new(card, "poseidon audio", 0, 0, 1, &pcm);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
pcm->info_flags = 0;
pcm->private_data = p;
strcpy(pcm->name, "poseidon audio capture");
strcpy(card->driver, "ALSA driver");
strcpy(card->shortname, "poseidon Audio");
strcpy(card->longname, "poseidon ALSA Audio");
if (snd_card_register(card)) {
snd_card_free(card);
return -ENOMEM;
}
pa->card = card;
return 0;
}
int poseidon_audio_free(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
if (pa->card)
snd_card_free(pa->card);
return 0;
}