V4L/DVB (6950): Lindent em28xx-audio.c
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab
Родитель
a52932b405
Коммит
1a6f11e0e8
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@ -44,37 +44,39 @@
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#include "em28xx.h"
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static int em28xx_cmd(struct em28xx *dev, int cmd,int arg);
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static int em28xx_cmd(struct em28xx *dev, int cmd, int arg);
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static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
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static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
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size_t size)
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{
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struct snd_pcm_runtime *runtime = subs->runtime;
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if(runtime->dma_area){
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if(runtime->dma_bytes > size)
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if (runtime->dma_area) {
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if (runtime->dma_bytes > size)
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return 0;
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vfree(runtime->dma_area);
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}
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runtime->dma_area = vmalloc(size);
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if(!runtime ->dma_area)
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if (!runtime->dma_area)
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return -ENOMEM;
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runtime->dma_bytes = size;
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return 0;
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}
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static struct snd_pcm_hardware snd_em28xx_hw_capture = {
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.info = SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID,
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.info =
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SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
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.rate_min = 48000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = 62720*8, /* just about the value in usbaudio.c */
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.period_bytes_min = 64, //12544/2,
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.buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
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.period_bytes_min = 64, //12544/2,
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.period_bytes_max = 12544,
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.periods_min = 2,
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.periods_max = 98, //12544,
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.periods_max = 98, //12544,
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};
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static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
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@ -84,66 +86,68 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
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struct em28xx *dev = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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printk("opening radio device and trying to acquire exclusive lock\n");
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switch(dev->mode){
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case TUNER_STUB_DVBC_TV:
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case TUNER_STUB_DVBT_TV:
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case TUNER_STUB_ATSC_TV:
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/* digital has no support for analog audio */
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if (ret != 0 ) {
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printk("device is already in use by DVB-T\n");
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return -EINVAL;
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} else {
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struct v4l2_tuner tuner;
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printk("switching device to FM mode\n");
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switch (dev->mode) {
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case TUNER_STUB_DVBC_TV:
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case TUNER_STUB_DVBT_TV:
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case TUNER_STUB_ATSC_TV:
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/* digital has no support for analog audio */
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if (ret != 0) {
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printk("device is already in use by DVB-T\n");
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return -EINVAL;
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} else {
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struct v4l2_tuner tuner;
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printk("switching device to FM mode\n");
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mode = TUNER_STUB_RADIO;
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memset(&tuner, 0x0, sizeof(struct v4l2_tuner));
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tuner.type = V4L2_TUNER_RADIO;
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mode = TUNER_STUB_RADIO;
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memset(&tuner, 0x0, sizeof(struct v4l2_tuner));
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tuner.type = V4L2_TUNER_RADIO;
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/* enable GPIO for analog TV */
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dev->em28xx_gpio_control(dev, EM28XX_MODE, (void*)mode);
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dev->mode = mode;
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/* upload firmware */
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tuner_run_cmd(dev->tobj, TUNER_CMD_INIT, (void*)mode);
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/* enable GPIO for analog TV */
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dev->em28xx_gpio_control(dev, EM28XX_MODE,
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(void *)mode);
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dev->mode = mode;
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/* upload firmware */
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tuner_run_cmd(dev->tobj, TUNER_CMD_INIT, (void *)mode);
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/* required for devices which have kerneldriver dependencies */
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// em28xx_config(dev);
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// em28xx_config_i2c(dev);
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/* required for devices which have kerneldriver dependencies */
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// em28xx_config(dev);
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// em28xx_config_i2c(dev);
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/* this is moreover to switch the decoder to FM */
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em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, &tuner);
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/* this is moreover to switch the decoder to FM */
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em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, &tuner);
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
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em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, 0);
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/* TODO switch to FM mode */
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
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em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, 0);
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/* TODO switch to FM mode */
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printk("em28xx-audio: %d mode\n", mode);
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tuner_run_cmd(dev->tobj, TUNER_CMD_G_MODE, &mode);
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printk("retrieved mode from tuner: %d\n",mode);
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}
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break;
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printk("em28xx-audio: %d mode\n", mode);
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tuner_run_cmd(dev->tobj, TUNER_CMD_G_MODE, &mode);
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printk("retrieved mode from tuner: %d\n", mode);
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}
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break;
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case TUNER_STUB_ANALOG_TV:
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printk("em28xx-audio: device is currently in analog TV mode\n");
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/* unmute by default */
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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break;
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case TUNER_STUB_RADIO:
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/* check current mode and put a hard lock onto it */
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printk("em28xx-audio: device is currently in analogue FM mode\n");
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/* unmute by default here */
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
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if ( ret == 0 )
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printk("device is locked in fmradio mode now\n");
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break;
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default:
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printk("em28xx-audio: unhandled mode %d\n", dev->mode);
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case TUNER_STUB_ANALOG_TV:
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printk("em28xx-audio: device is currently in analog TV mode\n");
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/* unmute by default */
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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break;
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case TUNER_STUB_RADIO:
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/* check current mode and put a hard lock onto it */
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printk
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("em28xx-audio: device is currently in analogue FM mode\n");
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/* unmute by default here */
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dev->em28xx_write_regs(dev, 0x0f, "\x87", 1);
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ret = dev->em28xx_acquire(dev, EM28XX_RADIO, 1);
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if (ret == 0)
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printk("device is locked in fmradio mode now\n");
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break;
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default:
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printk("em28xx-audio: unhandled mode %d\n", dev->mode);
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}
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runtime->hw = snd_em28xx_hw_capture;
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if(dev->alt == 0 && dev->adev->users == 0 ) {
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if (dev->alt == 0 && dev->adev->users == 0) {
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int errCode;
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dev->alt = 7;
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errCode = usb_set_interface(dev->udev, 0, 7);
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@ -163,48 +167,51 @@ static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
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dev->adev->users--;
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/* decrease audio reference */
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switch(dev->mode) {
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case TUNER_STUB_ANALOG_TV:
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amode = EM28XX_VIDEO;
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break;
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case TUNER_STUB_RADIO:
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amode = EM28XX_RADIO;
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break;
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default:
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printk("invalid mode: %d\n",dev->mode);
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break;
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switch (dev->mode) {
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case TUNER_STUB_ANALOG_TV:
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amode = EM28XX_VIDEO;
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break;
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case TUNER_STUB_RADIO:
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amode = EM28XX_RADIO;
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break;
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default:
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printk("invalid mode: %d\n", dev->mode);
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break;
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}
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dev->em28xx_acquire(dev, amode, 0);
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dev->em28xx_acquire(dev, amode, 0);
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if(dev->adev->users == 0 && dev->adev->shutdown == 1) {
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printk("audio users: %d\n",dev->adev->users);
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if (dev->adev->users == 0 && dev->adev->shutdown == 1) {
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printk("audio users: %d\n", dev->adev->users);
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printk("disabling audio stream!\n");
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dev->adev->shutdown = 0;
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printk("released lock\n");
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em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,0);
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em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
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}
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return 0;
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}
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static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params)
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static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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unsigned int channels, rate, format;
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int ret;
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ret = snd_pcm_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params));
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ret =
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snd_pcm_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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format = params_format(hw_params);
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rate = params_rate(hw_params);
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channels = params_channels(hw_params);
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/* TODO: set up em28xx audio chip to deliver the correct audio format, current default is 48000hz multiplexed => 96000hz mono
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which shouldn't matter since analogue TV only supports mono*/
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which shouldn't matter since analogue TV only supports mono */
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return 0;
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}
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static int snd_em28xx_hw_capture_free(struct snd_pcm_substream *substream)
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{
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struct em28xx *dev = snd_pcm_substream_chip(substream);
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if(dev->adev->capture_stream==STREAM_ON){
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em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,0);
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if (dev->adev->capture_stream == STREAM_ON) {
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em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
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}
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return 0;
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}
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@ -214,24 +221,25 @@ static int snd_em28xx_prepare(struct snd_pcm_substream *substream)
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return 0;
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}
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static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream, int cmd)
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static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream,
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int cmd)
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{
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struct em28xx *dev = snd_pcm_substream_chip(substream);
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switch(cmd){
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case SNDRV_PCM_TRIGGER_START:
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em28xx_cmd(dev,EM28XX_CAPTURE_STREAM_EN,1);
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return 0;
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case SNDRV_PCM_TRIGGER_STOP:
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dev->adev->shutdown=1;
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return 0;
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default:
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return -EINVAL;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 1);
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return 0;
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case SNDRV_PCM_TRIGGER_STOP:
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dev->adev->shutdown = 1;
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return 0;
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default:
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return -EINVAL;
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}
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}
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static void em28xx_audio_isocirq(struct urb *urb)
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{
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struct em28xx *dev=urb->context;
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struct em28xx *dev = urb->context;
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int i;
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unsigned int oldptr;
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unsigned long flags;
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@ -241,50 +249,61 @@ static void em28xx_audio_isocirq(struct urb *urb)
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unsigned int stride;
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struct snd_pcm_substream *substream;
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struct snd_pcm_runtime *runtime;
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if(dev->adev->capture_pcm_substream){
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substream=dev->adev->capture_pcm_substream;
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runtime=substream->runtime;
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if (dev->adev->capture_pcm_substream) {
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substream = dev->adev->capture_pcm_substream;
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runtime = substream->runtime;
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stride = runtime->frame_bits >> 3;
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for(i=0;i<urb->number_of_packets;i++){
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int length=urb->iso_frame_desc[i].actual_length/stride;
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cp=(unsigned char *) urb->transfer_buffer + urb->iso_frame_desc[i].offset;
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for (i = 0; i < urb->number_of_packets; i++) {
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int length =
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urb->iso_frame_desc[i].actual_length / stride;
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cp = (unsigned char *)urb->transfer_buffer +
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urb->iso_frame_desc[i].offset;
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if(!length)
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if (!length)
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continue;
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spin_lock_irqsave(&dev->adev->slock, flags);
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oldptr = dev->adev->hwptr_done_capture;
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dev->adev->hwptr_done_capture +=length;
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if(dev->adev->hwptr_done_capture >= runtime->buffer_size)
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dev->adev->hwptr_done_capture -= runtime->buffer_size;
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dev->adev->hwptr_done_capture += length;
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if (dev->adev->hwptr_done_capture >=
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runtime->buffer_size)
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dev->adev->hwptr_done_capture -=
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runtime->buffer_size;
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dev->adev->capture_transfer_done += length;
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if(dev->adev->capture_transfer_done >= runtime->period_size){
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dev->adev->capture_transfer_done -= runtime->period_size;
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period_elapsed=1;
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if (dev->adev->capture_transfer_done >=
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runtime->period_size) {
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dev->adev->capture_transfer_done -=
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runtime->period_size;
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period_elapsed = 1;
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}
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spin_unlock_irqrestore(&dev->adev->slock, flags);
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if(oldptr + length >= runtime->buffer_size){
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unsigned int cnt = runtime->buffer_size-oldptr-1;
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memcpy(runtime->dma_area+oldptr*stride, cp , cnt*stride);
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memcpy(runtime->dma_area, cp + cnt, length*stride - cnt*stride);
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if (oldptr + length >= runtime->buffer_size) {
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unsigned int cnt =
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runtime->buffer_size - oldptr - 1;
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memcpy(runtime->dma_area + oldptr * stride, cp,
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cnt * stride);
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memcpy(runtime->dma_area, cp + cnt,
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length * stride - cnt * stride);
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} else {
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memcpy(runtime->dma_area+oldptr*stride, cp, length*stride);
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memcpy(runtime->dma_area + oldptr * stride, cp,
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length * stride);
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}
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}
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if(period_elapsed){
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if (period_elapsed) {
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snd_pcm_period_elapsed(substream);
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}
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}
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urb->status = 0;
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if(dev->adev->shutdown)
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if (dev->adev->shutdown)
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return;
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if((status = usb_submit_urb(urb, GFP_ATOMIC))){
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em28xx_errdev("resubmit of audio urb failed (error=%i)\n", status);
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if ((status = usb_submit_urb(urb, GFP_ATOMIC))) {
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em28xx_errdev("resubmit of audio urb failed (error=%i)\n",
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status);
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}
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return;
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}
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@ -292,10 +311,10 @@ static void em28xx_audio_isocirq(struct urb *urb)
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static int em28xx_isoc_audio_deinit(struct em28xx *dev)
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{
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int i;
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for(i=0;i<EM28XX_AUDIO_BUFS;i++){
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for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
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usb_kill_urb(dev->adev->urb[i]);
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usb_free_urb(dev->adev->urb[i]);
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dev->adev->urb[i]=NULL;
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dev->adev->urb[i] = NULL;
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}
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return 0;
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}
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@ -304,40 +323,42 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
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{
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int i;
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int errCode;
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const int sb_size=EM28XX_NUM_AUDIO_PACKETS * EM28XX_AUDIO_MAX_PACKET_SIZE;
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const int sb_size =
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EM28XX_NUM_AUDIO_PACKETS * EM28XX_AUDIO_MAX_PACKET_SIZE;
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for(i=0;i<EM28XX_AUDIO_BUFS;i++){
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for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
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struct urb *urb;
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int j,k;
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dev->adev->transfer_buffer[i]=kmalloc(sb_size,GFP_ATOMIC);
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if(!dev->adev->transfer_buffer[i]){
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int j, k;
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dev->adev->transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
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if (!dev->adev->transfer_buffer[i]) {
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return -ENOMEM;
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}
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memset(dev->adev->transfer_buffer[i],0x80,sb_size);
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urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS,GFP_ATOMIC);
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if(urb){
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urb->dev=dev->udev;
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urb->context=dev;
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urb->pipe=usb_rcvisocpipe(dev->udev,0x83);
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memset(dev->adev->transfer_buffer[i], 0x80, sb_size);
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urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
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if (urb) {
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urb->dev = dev->udev;
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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)
|
||||
|
|
|
|||
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