saa7134-oss.c

saa7134-0.2.9.tar.gz 电视卡驱动程序

			return put_user(dev->oss.afmt,(int*)arg);
		default:
			return -EINVAL;
		}

        case SOUND_PCM_READ_BITS:
		switch (dev->oss.afmt) {
		case AFMT_U8:
		case AFMT_S8:
			return put_user(8, (int*)arg);
		case AFMT_U16_LE:
		case AFMT_U16_BE:
		case AFMT_S16_LE:
		case AFMT_S16_BE:
			return put_user(16, (int*)arg);
		default:
			return -EINVAL;
		}

        case SNDCTL_DSP_NONBLOCK:
                file->f_flags |= O_NONBLOCK;
                return 0;

        case SNDCTL_DSP_RESET:
		down(&dev->oss.lock);
		if (dev->oss.recording)
			dsp_rec_stop(dev);
		up(&dev->oss.lock);
		return 0;
        case SNDCTL_DSP_GETBLKSIZE:
		return put_user(dev->oss.blksize,(int*)arg);

        case SNDCTL_DSP_SETFRAGMENT:
		if (get_user(val, (int*)arg))
			return -EFAULT;
		if (dev->oss.recording)
			return -EBUSY;
		dsp_buffer_free(dev);
		dsp_buffer_conf(dev,1 << (val & 0xffff), (arg >> 16) & 0xffff);
		dsp_buffer_init(dev);
		return 0;

        case SNDCTL_DSP_SYNC:
		/* NOP */
		return 0;

	case SNDCTL_DSP_GETISPACE:
	{
		audio_buf_info info;
		info.fragsize   = dev->oss.blksize;
		info.fragstotal = dev->oss.blocks;
		info.bytes      = dev->oss.read_count;
		info.fragments  = info.bytes / info.fragsize;
		if (copy_to_user((void *)arg, &info, sizeof(info)))
			return -EFAULT;
		return 0;
	}
	default:
		return -EINVAL;
	}
}

static unsigned int dsp_poll(struct file *file, struct poll_table_struct *wait)
{
	struct saa7134_dev *dev = file->private_data;
	unsigned int mask = 0;

	poll_wait(file, &dev->oss.wq, wait);

	if (0 == dev->oss.read_count) {
		down(&dev->oss.lock);
		if (!dev->oss.recording)
			dsp_rec_start(dev);
		up(&dev->oss.lock);
	} else
		mask |= (POLLIN | POLLRDNORM);
	return mask;
}

struct file_operations saa7134_dsp_fops = {
	.owner   = THIS_MODULE,
	.open    = dsp_open,
	.release = dsp_release,
	.read    = dsp_read,
	.write   = dsp_write,
	.ioctl   = dsp_ioctl,
	.poll    = dsp_poll,
	.llseek  = no_llseek,
};

/* ------------------------------------------------------------------ */

static int
mixer_recsrc_7134(struct saa7134_dev *dev)
{
	int analog_io,rate;
	
	switch (dev->oss.input) {
	case TV:
		saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
		saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
		break;
	case LINE1:
	case LINE2:
		analog_io = (LINE1 == dev->oss.input) ? 0x00 : 0x08;
		rate = (32000 == dev->oss.rate) ? 0x01 : 0x03;
		saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
		saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
		saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
		break;
	}
	return 0;
}

static int
mixer_recsrc_7133(struct saa7134_dev *dev)
{
	u32 value = 0xbbbbbb;
	
	switch (dev->oss.input) {
	case TV:
		value = 0xbbbb10;  /* MAIN */
		break;
	case LINE1:
		value = 0xbbbb32;  /* AUX1 */
		break;
	case LINE2:
		value = 0xbbbb54;  /* AUX2 */
		break;
	}
	saa_dsp_writel(dev, 0x46c >> 2, value);
	return 0;
}

static int
mixer_recsrc(struct saa7134_dev *dev, enum saa7134_audio_in src)
{
	static const char *iname[] = { "Oops", "TV", "LINE1", "LINE2" };

	dev->oss.count++;
	dev->oss.input = src;
	dprintk("mixer input = %s\n",iname[dev->oss.input]);

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		mixer_recsrc_7134(dev);
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		mixer_recsrc_7133(dev);
		break;
	}
	return 0;
}

static int
mixer_level(struct saa7134_dev *dev, enum saa7134_audio_in src, int level)
{
	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		switch (src) {
		case TV:
			/* nothing */
			break;
		case LINE1:
			saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
				   (100 == level) ? 0x00 : 0x10);
			break;
		case LINE2:
			saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
				   (100 == level) ? 0x00 : 0x20);
			break;
		}
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		/* nothing */
		break;
	}
	return 0;
}

/* ------------------------------------------------------------------ */

static int mixer_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct saa7134_dev *h,*dev = NULL;
	struct list_head *list;

	list_for_each(list,&saa7134_devlist) {
		h = list_entry(list, struct saa7134_dev, devlist);
		if (h->oss.minor_mixer == minor)
			dev = h;
	}
	if (NULL == dev)
		return -ENODEV;

	file->private_data = dev;
	return 0;
}

static int mixer_release(struct inode *inode, struct file *file)
{
	file->private_data = NULL;
	return 0;
}

static int mixer_ioctl(struct inode *inode, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
	struct saa7134_dev *dev = file->private_data;
	enum saa7134_audio_in input;
	int val,ret;
	
	if (oss_debug > 1)
		saa7134_print_ioctl(dev->name,cmd);
        switch (cmd) {
        case OSS_GETVERSION:
                return put_user(SOUND_VERSION, (int *)arg);
	case SOUND_MIXER_INFO:
	{
		mixer_info info;
		memset(&info,0,sizeof(info));
                strlcpy(info.id,   "TV audio", sizeof(info.id));
                strlcpy(info.name, dev->name,  sizeof(info.name));
                info.modify_counter = dev->oss.count;
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
		return 0;
	}
	case SOUND_OLD_MIXER_INFO:
	{
		_old_mixer_info info;
		memset(&info,0,sizeof(info));
                strlcpy(info.id,   "TV audio", sizeof(info.id));
                strlcpy(info.name, dev->name,  sizeof(info.name));
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
		return 0;
	}
	case MIXER_READ(SOUND_MIXER_CAPS):
		return put_user(SOUND_CAP_EXCL_INPUT,(int*)arg);
	case MIXER_READ(SOUND_MIXER_STEREODEVS):
		return put_user(0,(int*)arg);
	case MIXER_READ(SOUND_MIXER_RECMASK):
	case MIXER_READ(SOUND_MIXER_DEVMASK):
		val = SOUND_MASK_LINE1 | SOUND_MASK_LINE2;
		if (32000 == dev->oss.rate)
			val |= SOUND_MASK_VIDEO;
		return put_user(val,(int*)arg);

	case MIXER_WRITE(SOUND_MIXER_RECSRC):
		if (get_user(val, (int *)arg))
			return -EFAULT;
		input = dev->oss.input;
		if (32000 == dev->oss.rate  &&
		    val & SOUND_MASK_VIDEO  &&  dev->oss.input != TV)
			input = TV;
		if (val & SOUND_MASK_LINE1  &&  dev->oss.input != LINE1)
			input = LINE1;
		if (val & SOUND_MASK_LINE2  &&  dev->oss.input != LINE2)
			input = LINE2;
		if (input != dev->oss.input)
			mixer_recsrc(dev,input);
		/* fall throuth */
	case MIXER_READ(SOUND_MIXER_RECSRC):
		switch (dev->oss.input) {
		case TV:    ret = SOUND_MASK_VIDEO; break;
		case LINE1: ret = SOUND_MASK_LINE1; break;
		case LINE2: ret = SOUND_MASK_LINE2; break;
		default:    ret = 0;
		}
		return put_user(ret,(int*)arg);

	case MIXER_WRITE(SOUND_MIXER_VIDEO):
	case MIXER_READ(SOUND_MIXER_VIDEO):
		if (32000 != dev->oss.rate)
			return -EINVAL;
		return put_user(100 | 100 << 8,(int*)arg);

	case MIXER_WRITE(SOUND_MIXER_LINE1):
		if (get_user(val, (int *)arg))
			return -EFAULT;
		val &= 0xff;
		val = (val <= 50) ? 50 : 100;
		dev->oss.line1 = val;
		mixer_level(dev,LINE1,dev->oss.line1);
		/* fall throuth */
	case MIXER_READ(SOUND_MIXER_LINE1):
		return put_user(dev->oss.line1 | dev->oss.line1 << 8,
				(int*)arg);

	case MIXER_WRITE(SOUND_MIXER_LINE2):
		if (get_user(val, (int *)arg))
			return -EFAULT;
		val &= 0xff;
		val = (val <= 50) ? 50 : 100;
		dev->oss.line2 = val;
		mixer_level(dev,LINE2,dev->oss.line2);
		/* fall throuth */
	case MIXER_READ(SOUND_MIXER_LINE2):
		return put_user(dev->oss.line2 | dev->oss.line2 << 8,
				(int*)arg);

	default:
		return -EINVAL;
	}
}

struct file_operations saa7134_mixer_fops = {
	.owner   = THIS_MODULE,
	.open    = mixer_open,
	.release = mixer_release,
	.ioctl   = mixer_ioctl,
	.llseek  = no_llseek,
};

/* ------------------------------------------------------------------ */

int saa7134_oss_init1(struct saa7134_dev *dev)
{
	/* general */
        init_MUTEX(&dev->oss.lock);
	init_waitqueue_head(&dev->oss.wq);

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		saa_writel(0x588 >> 2, 0x00000fff);
		saa_writel(0x58c >> 2, 0x00543210);
		saa_dsp_writel(dev, 0x46c >> 2, 0xbbbbbb);
		break;
	}

	/* dsp */
	dev->oss.rate = 32000;
	if (oss_rate)
		dev->oss.rate = oss_rate;
	if (saa7134_boards[dev->board].i2s_rate)
		dev->oss.rate = saa7134_boards[dev->board].i2s_rate;
	dev->oss.rate = (dev->oss.rate > 40000) ? 48000 : 32000;

	/* mixer */
	dev->oss.line1 = 50;
	dev->oss.line2 = 50;
	mixer_level(dev,LINE1,dev->oss.line1);
	mixer_level(dev,LINE2,dev->oss.line2);
	mixer_recsrc(dev, (dev->oss.rate == 32000) ? TV : LINE2);
	
	return 0;
}

int saa7134_oss_fini(struct saa7134_dev *dev)
{
	/* nothing */
	return 0;
}

void saa7134_irq_oss_done(struct saa7134_dev *dev, unsigned long status)
{
	int next_blk, reg = 0;

	spin_lock(&dev->slock);
	if (UNSET == dev->oss.dma_blk) {
		dprintk("irq: recording stopped\n");
		goto done;
	}
	if (0 != (status & 0x0f000000))
		dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
	if (0 == (status & 0x10000000)) {
		/* odd */
		if (0 == (dev->oss.dma_blk & 0x01))
			reg = SAA7134_RS_BA1(6);
	} else {
		/* even */
		if (0 == (dev->oss.dma_blk & 0x00))
			reg = SAA7134_RS_BA2(6);
	}
	if (0 == reg) {
		dprintk("irq: field oops [%s]\n",
			(status & 0x10000000) ? "even" : "odd");
		goto done;
	}
	if (dev->oss.read_count >= dev->oss.blksize * (dev->oss.blocks-2)) {
		dprintk("irq: overrun [full=%d/%d]\n",dev->oss.read_count,
			dev->oss.bufsize);
		dsp_rec_stop(dev);
		goto done;
	}

	/* next block addr */
	next_blk = (dev->oss.dma_blk + 2) % dev->oss.blocks;
	saa_writel(reg,next_blk * dev->oss.blksize);
	if (oss_debug > 2)
		dprintk("irq: ok, %s, next_blk=%d, addr=%x\n",
			(status & 0x10000000) ? "even" : "odd ", next_blk,
			next_blk * dev->oss.blksize);

	/* update status & wake waiting readers */
	dev->oss.dma_blk = (dev->oss.dma_blk + 1) % dev->oss.blocks;
	dev->oss.read_count += dev->oss.blksize;
	wake_up(&dev->oss.wq);
	
 done:
	spin_unlock(&dev->slock);
}

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */