extractedLnx/linux-2.6.9/drivers/usb/class/audio.c_usb_audio_ioctl.c

static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
	struct usb_audio_state *s = as->state;
	int __user *user_arg = (int __user *)arg;
	unsigned long flags;
	audio_buf_info abinfo;
	count_info cinfo;
	int val = 0;
	int val2, mapped, ret;

	if (!s->usbdev)
		return -EIO;
	mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
		((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
#if 0
	if (arg)
		get_user(val, (int *)arg);
	printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
#endif
	switch (cmd) {
	case OSS_GETVERSION:
		return put_user(SOUND_VERSION, user_arg);

	case SNDCTL_DSP_SYNC:
		if (file->f_mode & FMODE_WRITE)
			return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
		return 0;

	case SNDCTL_DSP_SETDUPLEX:
		return 0;

	case SNDCTL_DSP_GETCAPS:
		return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | 
				DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg);

	case SNDCTL_DSP_RESET:
		if (file->f_mode & FMODE_WRITE) {
			usbout_stop(as);
			as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
		}
		if (file->f_mode & FMODE_READ) {
			usbin_stop(as);
			as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
		}
		return 0;

	case SNDCTL_DSP_SPEED:
		if (get_user(val, user_arg))
			return -EFAULT;
		if (val >= 0) {
			if (val < 4000)
				val = 4000;
			if (val > 100000)
				val = 100000;
			if (set_format(as, file->f_mode, AFMT_QUERY, val))
				return -EIO;
		}
		return put_user((file->f_mode & FMODE_READ) ? 
				as->usbin.dma.srate : as->usbout.dma.srate,
				user_arg);

	case SNDCTL_DSP_STEREO:
		if (get_user(val, user_arg))
			return -EFAULT;
		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
		if (val)
			val2 |= AFMT_STEREO;
		else
			val2 &= ~AFMT_STEREO;
		if (set_format(as, file->f_mode, val2, 0))
			return -EIO;
		return 0;

	case SNDCTL_DSP_CHANNELS:
		if (get_user(val, user_arg))
			return -EFAULT;
		if (val != 0) {
			val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
			if (val == 1)
				val2 &= ~AFMT_STEREO;
			else
				val2 |= AFMT_STEREO;
			if (set_format(as, file->f_mode, val2, 0))
				return -EIO;
		}
		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
		return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);

	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
		return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
				AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg);

	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
		if (get_user(val, user_arg))
			return -EFAULT;
		if (val != AFMT_QUERY) {
			if (hweight32(val) != 1)
				return -EINVAL;
			if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
				     AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
				return -EINVAL;
			val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
			val |= val2 & AFMT_STEREO;
			if (set_format(as, file->f_mode, val, 0))
				return -EIO;
		}
		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
		return put_user(val2 & ~AFMT_STEREO, user_arg);

	case SNDCTL_DSP_POST:
		return 0;

	case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING) 
			val |= PCM_ENABLE_INPUT;
		if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING) 
			val |= PCM_ENABLE_OUTPUT;
		return put_user(val, user_arg);

	case SNDCTL_DSP_SETTRIGGER:
		if (get_user(val, user_arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			if (val & PCM_ENABLE_INPUT) {
				if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
					return ret;
				if (usbin_start(as))
					return -ENODEV;
			} else
				usbin_stop(as);
		}
		if (file->f_mode & FMODE_WRITE) {
			if (val & PCM_ENABLE_OUTPUT) {
				if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
					return ret;
				if (usbout_start(as))
					return -ENODEV;
			} else
				usbout_stop(as);
		}
		return 0;

	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
			return val;
		spin_lock_irqsave(&as->lock, flags);
		abinfo.fragsize = as->usbout.dma.fragsize;
		abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count;
		abinfo.fragstotal = as->usbout.dma.numfrag;
		abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift;      
		spin_unlock_irqrestore(&as->lock, flags);
		return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETISPACE:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
			return val;
		spin_lock_irqsave(&as->lock, flags);
		abinfo.fragsize = as->usbin.dma.fragsize;
		abinfo.bytes = as->usbin.dma.count;
		abinfo.fragstotal = as->usbin.dma.numfrag;
		abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift;      
		spin_unlock_irqrestore(&as->lock, flags);
		return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
		
	case SNDCTL_DSP_NONBLOCK:
		file->f_flags |= O_NONBLOCK;
		return 0;

	case SNDCTL_DSP_GETODELAY:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		spin_lock_irqsave(&as->lock, flags);
		val = as->usbout.dma.count;
		spin_unlock_irqrestore(&as->lock, flags);
		return put_user(val, user_arg);

	case SNDCTL_DSP_GETIPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		spin_lock_irqsave(&as->lock, flags);
		cinfo.bytes = as->usbin.dma.total_bytes;
		cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift;
		cinfo.ptr = as->usbin.dma.wrptr;
		if (as->usbin.dma.mapped)
			as->usbin.dma.count &= as->usbin.dma.fragsize-1;
		spin_unlock_irqrestore(&as->lock, flags);
		if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

	case SNDCTL_DSP_GETOPTR:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		spin_lock_irqsave(&as->lock, flags);
		cinfo.bytes = as->usbout.dma.total_bytes;
		cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift;
		cinfo.ptr = as->usbout.dma.rdptr;
		if (as->usbout.dma.mapped)
			as->usbout.dma.count &= as->usbout.dma.fragsize-1;
		spin_unlock_irqrestore(&as->lock, flags);
		if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

       case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE) {
			if ((val = prog_dmabuf_out(as)))
				return val;
			return put_user(as->usbout.dma.fragsize, user_arg);
		}
		if ((val = prog_dmabuf_in(as)))
			return val;
		return put_user(as->usbin.dma.fragsize, user_arg);

	case SNDCTL_DSP_SETFRAGMENT:
		if (get_user(val, user_arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			as->usbin.dma.ossfragshift = val & 0xffff;
			as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff;
			if (as->usbin.dma.ossfragshift < 4)
				as->usbin.dma.ossfragshift = 4;
			if (as->usbin.dma.ossfragshift > 15)
				as->usbin.dma.ossfragshift = 15;
			if (as->usbin.dma.ossmaxfrags < 4)
				as->usbin.dma.ossmaxfrags = 4;
		}
		if (file->f_mode & FMODE_WRITE) {
			as->usbout.dma.ossfragshift = val & 0xffff;
			as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff;
			if (as->usbout.dma.ossfragshift < 4)
				as->usbout.dma.ossfragshift = 4;
			if (as->usbout.dma.ossfragshift > 15)
				as->usbout.dma.ossfragshift = 15;
			if (as->usbout.dma.ossmaxfrags < 4)
				as->usbout.dma.ossmaxfrags = 4;
		}
		return 0;

	case SNDCTL_DSP_SUBDIVIDE:
		if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) ||
		    (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision))
			return -EINVAL;
		if (get_user(val, user_arg))
			return -EFAULT;
		if (val != 1 && val != 2 && val != 4)
			return -EINVAL;
		if (file->f_mode & FMODE_READ)
			as->usbin.dma.subdivision = val;
		if (file->f_mode & FMODE_WRITE)
			as->usbout.dma.subdivision = val;
		return 0;

	case SOUND_PCM_READ_RATE:
		return put_user((file->f_mode & FMODE_READ) ? 
				as->usbin.dma.srate : as->usbout.dma.srate,
				user_arg);

	case SOUND_PCM_READ_CHANNELS:
		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
		return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);

	case SOUND_PCM_READ_BITS:
		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
		return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg);

	case SOUND_PCM_WRITE_FILTER:
	case SNDCTL_DSP_SETSYNCRO:
	case SOUND_PCM_READ_FILTER:
		return -EINVAL;
	}
	dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
	return -ENOIOCTLCMD;
}