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-rw-r--r--drivers/media/video/em28xx/em28xx-audio.c373
1 files changed, 197 insertions, 176 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
index e1e1eda517a..c631cac4c5d 100644
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ b/drivers/media/video/em28xx/em28xx-audio.c
@@ -44,37 +44,39 @@
#include "em28xx.h"
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
-static int em28xx_cmd(struct em28xx *dev, int cmd,int arg);
+static int em28xx_cmd(struct em28xx *dev, int cmd, int arg);
-
-static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
+static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
+ size_t size)
{
struct snd_pcm_runtime *runtime = subs->runtime;
- if(runtime->dma_area){
- if(runtime->dma_bytes > size)
+ if (runtime->dma_area) {
+ if (runtime->dma_bytes > size)
return 0;
vfree(runtime->dma_area);
}
runtime->dma_area = vmalloc(size);
- if(!runtime ->dma_area)
+ if (!runtime->dma_area)
return -ENOMEM;
runtime->dma_bytes = size;
return 0;
}
static struct snd_pcm_hardware snd_em28xx_hw_capture = {
- .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID,
+ .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_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
- .buffer_bytes_max = 62720*8, /* just about the value in usbaudio.c */
- .period_bytes_min = 64, //12544/2,
+ .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
+ .period_bytes_min = 64, //12544/2,
.period_bytes_max = 12544,
.periods_min = 2,
- .periods_max = 98, //12544,
+ .periods_max = 98, //12544,
};
static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
@@ -84,66 +86,68 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
struct em28xx *dev = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
printk("opening radio device and trying to acquire exclusive lock\n");
- switch(dev->mode){
- case TUNER_STUB_DVBC_TV:
- case TUNER_STUB_DVBT_TV:
- case TUNER_STUB_ATSC_TV:
- /* digital has no support for analog audio */
- if (ret != 0 ) {
- printk("device is already in use by DVB-T\n");
- return -EINVAL;
- } else {
- struct v4l2_tuner tuner;
- printk("switching device to FM mode\n");
-
- mode = TUNER_STUB_RADIO;
- memset(&tuner, 0x0, sizeof(struct v4l2_tuner));
- tuner.type = V4L2_TUNER_RADIO;
-
- /* enable GPIO for analog TV */
- dev->em28xx_gpio_control(dev, EM28XX_MODE, (void*)mode);
- dev->mode = mode;
- /* upload firmware */
- tuner_run_cmd(dev->tobj, TUNER_CMD_INIT, (void*)mode);
-
- /* required for devices which have kerneldriver dependencies */
-// em28xx_config(dev);
-// em28xx_config_i2c(dev);
-
- /* this is moreover to switch the decoder to FM */
- em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, &tuner);
-
- dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
- ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
- em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, 0);
- /* TODO switch to FM mode */
-
- printk("em28xx-audio: %d mode\n", mode);
- tuner_run_cmd(dev->tobj, TUNER_CMD_G_MODE, &mode);
- printk("retrieved mode from tuner: %d\n",mode);
- }
- break;
-
- case TUNER_STUB_ANALOG_TV:
- printk("em28xx-audio: device is currently in analog TV mode\n");
- /* unmute by default */
- dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
- break;
- case TUNER_STUB_RADIO:
- /* check current mode and put a hard lock onto it */
- printk("em28xx-audio: device is currently in analogue FM mode\n");
- /* unmute by default here */
- dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
- ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
- if ( ret == 0 )
- printk("device is locked in fmradio mode now\n");
- break;
- default:
- printk("em28xx-audio: unhandled mode %d\n", dev->mode);
+ switch (dev->mode) {
+ case TUNER_STUB_DVBC_TV:
+ case TUNER_STUB_DVBT_TV:
+ case TUNER_STUB_ATSC_TV:
+ /* digital has no support for analog audio */
+ if (ret != 0) {
+ printk("device is already in use by DVB-T\n");
+ return -EINVAL;
+ } else {
+ struct v4l2_tuner tuner;
+ printk("switching device to FM mode\n");
+
+ mode = TUNER_STUB_RADIO;
+ memset(&tuner, 0x0, sizeof(struct v4l2_tuner));
+ tuner.type = V4L2_TUNER_RADIO;
+
+ /* enable GPIO for analog TV */
+ dev->em28xx_gpio_control(dev, EM28XX_MODE,
+ (void *)mode);
+ dev->mode = mode;
+ /* upload firmware */
+ tuner_run_cmd(dev->tobj, TUNER_CMD_INIT, (void *)mode);
+
+ /* required for devices which have kerneldriver dependencies */
+// em28xx_config(dev);
+// em28xx_config_i2c(dev);
+
+ /* this is moreover to switch the decoder to FM */
+ em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, &tuner);
+
+ dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
+ ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
+ em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, 0);
+ /* TODO switch to FM mode */
+
+ printk("em28xx-audio: %d mode\n", mode);
+ tuner_run_cmd(dev->tobj, TUNER_CMD_G_MODE, &mode);
+ printk("retrieved mode from tuner: %d\n", mode);
+ }
+ break;
+
+ case TUNER_STUB_ANALOG_TV:
+ printk("em28xx-audio: device is currently in analog TV mode\n");
+ /* unmute by default */
+ dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
+ break;
+ case TUNER_STUB_RADIO:
+ /* check current mode and put a hard lock onto it */
+ printk
+ ("em28xx-audio: device is currently in analogue FM mode\n");
+ /* unmute by default here */
+ dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
+ ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
+ if (ret == 0)
+ printk("device is locked in fmradio mode now\n");
+ break;
+ default:
+ printk("em28xx-audio: unhandled mode %d\n", dev->mode);
}
runtime->hw = snd_em28xx_hw_capture;
- if(dev->alt == 0 && dev->adev->users == 0 ) {
+ if (dev->alt == 0 && dev->adev->users == 0) {
int errCode;
dev->alt = 7;
errCode = usb_set_interface(dev->udev, 0, 7);
@@ -163,48 +167,51 @@ static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
dev->adev->users--;
/* decrease audio reference */
- switch(dev->mode) {
- case TUNER_STUB_ANALOG_TV:
- amode = EM28XX_VIDEO;
- break;
- case TUNER_STUB_RADIO:
- amode = EM28XX_RADIO;
- break;
- default:
- printk("invalid mode: %d\n",dev->mode);
- break;
+ switch (dev->mode) {
+ case TUNER_STUB_ANALOG_TV:
+ amode = EM28XX_VIDEO;
+ break;
+ case TUNER_STUB_RADIO:
+ amode = EM28XX_RADIO;
+ break;
+ default:
+ printk("invalid mode: %d\n", dev->mode);
+ break;
}
- dev->em28xx_acquire(dev, amode, 0);
+ dev->em28xx_acquire(dev, amode, 0);
- if(dev->adev->users == 0 && dev->adev->shutdown == 1) {
- printk("audio users: %d\n",dev->adev->users);
+ if (dev->adev->users == 0 && dev->adev->shutdown == 1) {
+ printk("audio users: %d\n", dev->adev->users);
printk("disabling audio stream!\n");
dev->adev->shutdown = 0;
printk("released lock\n");
- em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,0);
+ em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
}
return 0;
}
-static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params)
+static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
{
unsigned int channels, rate, format;
int ret;
- ret = snd_pcm_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params));
+ ret =
+ snd_pcm_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(hw_params));
format = params_format(hw_params);
rate = params_rate(hw_params);
channels = params_channels(hw_params);
/* TODO: set up em28xx audio chip to deliver the correct audio format, current default is 48000hz multiplexed => 96000hz mono
- which shouldn't matter since analogue TV only supports mono*/
+ which shouldn't matter since analogue TV only supports mono */
return 0;
}
static int snd_em28xx_hw_capture_free(struct snd_pcm_substream *substream)
{
struct em28xx *dev = snd_pcm_substream_chip(substream);
- if(dev->adev->capture_stream==STREAM_ON){
- em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,0);
+ if (dev->adev->capture_stream == STREAM_ON) {
+ em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
}
return 0;
}
@@ -214,24 +221,25 @@ static int snd_em28xx_prepare(struct snd_pcm_substream *substream)
return 0;
}
-static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream,
+ int cmd)
{
struct em28xx *dev = snd_pcm_substream_chip(substream);
- switch(cmd){
- case SNDRV_PCM_TRIGGER_START:
- em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,1);
- return 0;
- case SNDRV_PCM_TRIGGER_STOP:
- dev->adev->shutdown=1;
- return 0;
- default:
- return -EINVAL;
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 1);
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ dev->adev->shutdown = 1;
+ return 0;
+ default:
+ return -EINVAL;
}
}
static void em28xx_audio_isocirq(struct urb *urb)
{
- struct em28xx *dev=urb->context;
+ struct em28xx *dev = urb->context;
int i;
unsigned int oldptr;
unsigned long flags;
@@ -241,50 +249,61 @@ static void em28xx_audio_isocirq(struct urb *urb)
unsigned int stride;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
- if(dev->adev->capture_pcm_substream){
- substream=dev->adev->capture_pcm_substream;
- runtime=substream->runtime;
+ if (dev->adev->capture_pcm_substream) {
+ substream = dev->adev->capture_pcm_substream;
+ runtime = substream->runtime;
stride = runtime->frame_bits >> 3;
- for(i=0;i<urb->number_of_packets;i++){
- int length=urb->iso_frame_desc[i].actual_length/stride;
- cp=(unsigned char *) urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ int length =
+ urb->iso_frame_desc[i].actual_length / stride;
+ cp = (unsigned char *)urb->transfer_buffer +
+ urb->iso_frame_desc[i].offset;
- if(!length)
+ if (!length)
continue;
spin_lock_irqsave(&dev->adev->slock, flags);
oldptr = dev->adev->hwptr_done_capture;
- dev->adev->hwptr_done_capture +=length;
- if(dev->adev->hwptr_done_capture >= runtime->buffer_size)
- dev->adev->hwptr_done_capture -= runtime->buffer_size;
+ dev->adev->hwptr_done_capture += length;
+ if (dev->adev->hwptr_done_capture >=
+ runtime->buffer_size)
+ dev->adev->hwptr_done_capture -=
+ runtime->buffer_size;
dev->adev->capture_transfer_done += length;
- if(dev->adev->capture_transfer_done >= runtime->period_size){
- dev->adev->capture_transfer_done -= runtime->period_size;
- period_elapsed=1;
+ if (dev->adev->capture_transfer_done >=
+ runtime->period_size) {
+ dev->adev->capture_transfer_done -=
+ runtime->period_size;
+ period_elapsed = 1;
}
spin_unlock_irqrestore(&dev->adev->slock, flags);
- if(oldptr + length >= runtime->buffer_size){
- unsigned int cnt = runtime->buffer_size-oldptr-1;
- memcpy(runtime->dma_area+oldptr*stride, cp , cnt*stride);
- memcpy(runtime->dma_area, cp + cnt, length*stride - cnt*stride);
+ if (oldptr + length >= runtime->buffer_size) {
+ unsigned int cnt =
+ runtime->buffer_size - oldptr - 1;
+ memcpy(runtime->dma_area + oldptr * stride, cp,
+ cnt * stride);
+ memcpy(runtime->dma_area, cp + cnt,
+ length * stride - cnt * stride);
} else {
- memcpy(runtime->dma_area+oldptr*stride, cp, length*stride);
+ memcpy(runtime->dma_area + oldptr * stride, cp,
+ length * stride);
}
}
- if(period_elapsed){
+ if (period_elapsed) {
snd_pcm_period_elapsed(substream);
}
}
urb->status = 0;
-
- if(dev->adev->shutdown)
+
+ if (dev->adev->shutdown)
return;
- if((status = usb_submit_urb(urb, GFP_ATOMIC))){
- em28xx_errdev("resubmit of audio urb failed (error=%i)\n", status);
+ if ((status = usb_submit_urb(urb, GFP_ATOMIC))) {
+ em28xx_errdev("resubmit of audio urb failed (error=%i)\n",
+ status);
}
return;
}
@@ -292,10 +311,10 @@ static void em28xx_audio_isocirq(struct urb *urb)
static int em28xx_isoc_audio_deinit(struct em28xx *dev)
{
int i;
- for(i=0;i<EM28XX_AUDIO_BUFS;i++){
+ for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
usb_kill_urb(dev->adev->urb[i]);
usb_free_urb(dev->adev->urb[i]);
- dev->adev->urb[i]=NULL;
+ dev->adev->urb[i] = NULL;
}
return 0;
}
@@ -304,40 +323,42 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
{
int i;
int errCode;
- const int sb_size=EM28XX_NUM_AUDIO_PACKETS * EM28XX_AUDIO_MAX_PACKET_SIZE;
+ const int sb_size =
+ EM28XX_NUM_AUDIO_PACKETS * EM28XX_AUDIO_MAX_PACKET_SIZE;
-
- for(i=0;i<EM28XX_AUDIO_BUFS;i++){
+ for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
struct urb *urb;
- int j,k;
- dev->adev->transfer_buffer[i]=kmalloc(sb_size,GFP_ATOMIC);
- if(!dev->adev->transfer_buffer[i]){
+ int j, k;
+ dev->adev->transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
+ if (!dev->adev->transfer_buffer[i]) {
return -ENOMEM;
}
- memset(dev->adev->transfer_buffer[i],0x80,sb_size);
- urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS,GFP_ATOMIC);
- if(urb){
- urb->dev=dev->udev;
- urb->context=dev;
- urb->pipe=usb_rcvisocpipe(dev->udev,0x83);
+ memset(dev->adev->transfer_buffer[i], 0x80, sb_size);
+ urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
+ if (urb) {
+ urb->dev = dev->udev;
+ urb->context = dev;
+ urb->pipe = usb_rcvisocpipe(dev->udev, 0x83);
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = dev->adev->transfer_buffer[i];
- urb->interval=1;
+ urb->interval = 1;
urb->complete = em28xx_audio_isocirq;
urb->number_of_packets = EM28XX_NUM_AUDIO_PACKETS;
urb->transfer_buffer_length = sb_size;
- for(j=k=0; j<EM28XX_NUM_AUDIO_PACKETS;j++,k+=EM28XX_AUDIO_MAX_PACKET_SIZE){
+ for (j = k = 0; j < EM28XX_NUM_AUDIO_PACKETS;
+ j++, k += EM28XX_AUDIO_MAX_PACKET_SIZE) {
urb->iso_frame_desc[j].offset = k;
- urb->iso_frame_desc[j].length=EM28XX_AUDIO_MAX_PACKET_SIZE;
+ urb->iso_frame_desc[j].length =
+ EM28XX_AUDIO_MAX_PACKET_SIZE;
}
- dev->adev->urb[i]=urb;
+ dev->adev->urb[i] = urb;
} else {
return -ENOMEM;
}
}
- for(i=0;i<EM28XX_AUDIO_BUFS;i++){
+ for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
errCode = usb_submit_urb(dev->adev->urb[i], GFP_ATOMIC);
- if (errCode){
+ if (errCode) {
em28xx_isoc_audio_deinit(dev);
return errCode;
}
@@ -345,27 +366,28 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
return 0;
}
-
-static int em28xx_cmd(struct em28xx *dev, int cmd,int arg)
+static int em28xx_cmd(struct em28xx *dev, int cmd, int arg)
{
- switch(cmd){
- case EM28XX_CAPTURE_STREAM_EN:
- if(dev->adev->capture_stream == STREAM_OFF && arg==1){
- dev->adev->capture_stream=STREAM_ON;
- em28xx_init_audio_isoc(dev);
- } else if (dev->adev->capture_stream==STREAM_ON && arg==0){
- dev->adev->capture_stream=STREAM_OFF;
- em28xx_isoc_audio_deinit(dev);
- } else {
- printk("An underrun occured very likely... ignoring it\n");
- }
- return 0;
- default:
- return -EINVAL;
+ switch (cmd) {
+ case EM28XX_CAPTURE_STREAM_EN:
+ if (dev->adev->capture_stream == STREAM_OFF && arg == 1) {
+ dev->adev->capture_stream = STREAM_ON;
+ em28xx_init_audio_isoc(dev);
+ } else if (dev->adev->capture_stream == STREAM_ON && arg == 0) {
+ dev->adev->capture_stream = STREAM_OFF;
+ em28xx_isoc_audio_deinit(dev);
+ } else {
+ printk
+ ("An underrun occured very likely... ignoring it\n");
+ }
+ return 0;
+ default:
+ return -EINVAL;
}
}
-static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream *substream)
+static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream
+ *substream)
{
struct em28xx *dev;
snd_pcm_uframes_t hwptr_done;
@@ -393,7 +415,6 @@ static struct snd_pcm_ops snd_em28xx_pcm_capture = {
.page = snd_pcm_get_vmalloc_page,
};
-
static int em28xx_audio_init(struct em28xx *dev)
{
struct em28xx_audio *adev;
@@ -404,54 +425,54 @@ static int em28xx_audio_init(struct em28xx *dev)
int err;
printk("em28xx-audio.c: probing for em28x1 non standard usbaudio\n");
printk("em28xx-audio.c: Copyright (C) 2006 Markus Rechberger\n");
- adev=kzalloc(sizeof(*adev),GFP_KERNEL);
- if(!adev){
+ adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+ if (!adev) {
printk("em28xx-audio.c: out of memory\n");
return -1;
}
- card = snd_card_new(index[devnr], "Em28xx Audio", THIS_MODULE,0);
- if(card==NULL){
+ card = snd_card_new(index[devnr], "Em28xx Audio", THIS_MODULE, 0);
+ if (card == NULL) {
kfree(adev);
return -ENOMEM;
}
spin_lock_init(&adev->slock);
- ret=snd_pcm_new(card, "Em28xx Audio", 0, 0, 1, &pcm);
+ ret = snd_pcm_new(card, "Em28xx Audio", 0, 0, 1, &pcm);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_em28xx_pcm_capture);
pcm->info_flags = 0;
pcm->private_data = dev;
- strcpy(pcm->name,"Empia 28xx Capture");
+ strcpy(pcm->name, "Empia 28xx Capture");
strcpy(card->driver, "Empia Em28xx Audio");
strcpy(card->shortname, "Em28xx Audio");
- strcpy(card->longname,"Empia Em28xx Audio");
+ strcpy(card->longname, "Empia Em28xx Audio");
- if((err = snd_card_register(card))<0){
+ if ((err = snd_card_register(card)) < 0) {
snd_card_free(card);
return -ENOMEM;
}
- adev->sndcard=card;
- adev->udev=dev->udev;
- dev->adev=adev;
+ adev->sndcard = card;
+ adev->udev = dev->udev;
+ dev->adev = adev;
return 0;
}
static int em28xx_audio_fini(struct em28xx *dev)
{
- if(dev==NULL)
+ if (dev == NULL)
return 0;
- if(dev->adev){
+ if (dev->adev) {
snd_card_free(dev->adev->sndcard);
kfree(dev->adev);
- dev->adev=NULL;
+ dev->adev = NULL;
}
return 0;
}
static struct em28xx_ops audio_ops = {
- .id = EM28XX_AUDIO,
- .name = "Em28xx Audio Extension",
- .init = em28xx_audio_init,
- .fini = em28xx_audio_fini,
+ .id = EM28XX_AUDIO,
+ .name = "Em28xx Audio Extension",
+ .init = em28xx_audio_init,
+ .fini = em28xx_audio_fini,
};
static int __init em28xx_alsa_register(void)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 06:09:12 +0000