extractedLnx/linux-2.6.9/sound/oss/sonicvibes.c_sv_ioctl.c

static int sv_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	struct sv_state *s = (struct sv_state *)file->private_data;
	unsigned long flags;
        audio_buf_info abinfo;
        count_info cinfo;
	int count;
	int val, mapped, ret;
	unsigned char fmtm, fmtd;
	void __user *argp = (void __user *)arg;
	int __user *p = argp;

	VALIDATE_STATE(s);
        mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
		((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
	switch (cmd) {
	case OSS_GETVERSION:
		return put_user(SOUND_VERSION, p);

	case SNDCTL_DSP_SYNC:
		if (file->f_mode & FMODE_WRITE)
			return drain_dac(s, 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, p);
		
        case SNDCTL_DSP_RESET:
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			synchronize_irq(s->irq);
			s->dma_dac.swptr = s->dma_dac.hwptr = s->dma_dac.count = s->dma_dac.total_bytes = 0;
		}
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			synchronize_irq(s->irq);
			s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0;
		}
		return 0;

        case SNDCTL_DSP_SPEED:
                if (get_user(val, p))
			return -EFAULT;
		if (val >= 0) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				set_adc_rate(s, val);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				set_dac_rate(s, val);
			}
		}
		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, p);
		
        case SNDCTL_DSP_STEREO:
                if (get_user(val, p))
			return -EFAULT;
		fmtd = 0;
		fmtm = ~0;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			s->dma_adc.ready = 0;
			if (val)
				fmtd |= SV_CFMT_STEREO << SV_CFMT_CSHIFT;
			else
				fmtm &= ~(SV_CFMT_STEREO << SV_CFMT_CSHIFT);
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			s->dma_dac.ready = 0;
			if (val)
				fmtd |= SV_CFMT_STEREO << SV_CFMT_ASHIFT;
			else
				fmtm &= ~(SV_CFMT_STEREO << SV_CFMT_ASHIFT);
		}
		set_fmt(s, fmtm, fmtd);
		return 0;

        case SNDCTL_DSP_CHANNELS:
                if (get_user(val, p))
			return -EFAULT;
		if (val != 0) {
			fmtd = 0;
			fmtm = ~0;
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				if (val >= 2)
					fmtd |= SV_CFMT_STEREO << SV_CFMT_CSHIFT;
				else
					fmtm &= ~(SV_CFMT_STEREO << SV_CFMT_CSHIFT);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val >= 2)
					fmtd |= SV_CFMT_STEREO << SV_CFMT_ASHIFT;
				else
					fmtm &= ~(SV_CFMT_STEREO << SV_CFMT_ASHIFT);
			}
			set_fmt(s, fmtm, fmtd);
		}
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (SV_CFMT_STEREO << SV_CFMT_CSHIFT) 
					   : (SV_CFMT_STEREO << SV_CFMT_ASHIFT))) ? 2 : 1, p);
		
	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
                return put_user(AFMT_S16_LE|AFMT_U8, p);
		
	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
		if (get_user(val, p))
			return -EFAULT;
		if (val != AFMT_QUERY) {
			fmtd = 0;
			fmtm = ~0;
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				if (val == AFMT_S16_LE)
					fmtd |= SV_CFMT_16BIT << SV_CFMT_CSHIFT;
				else
					fmtm &= ~(SV_CFMT_16BIT << SV_CFMT_CSHIFT);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val == AFMT_S16_LE)
					fmtd |= SV_CFMT_16BIT << SV_CFMT_ASHIFT;
				else
					fmtm &= ~(SV_CFMT_16BIT << SV_CFMT_ASHIFT);
			}
			set_fmt(s, fmtm, fmtd);
		}
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (SV_CFMT_16BIT << SV_CFMT_CSHIFT) 
					   : (SV_CFMT_16BIT << SV_CFMT_ASHIFT))) ? AFMT_S16_LE : AFMT_U8, p);
		
	case SNDCTL_DSP_POST:
                return 0;

        case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		if (file->f_mode & FMODE_READ && s->enable & SV_CENABLE_RE) 
			val |= PCM_ENABLE_INPUT;
		if (file->f_mode & FMODE_WRITE && s->enable & SV_CENABLE_PE) 
			val |= PCM_ENABLE_OUTPUT;
		return put_user(val, p);
		
	case SNDCTL_DSP_SETTRIGGER:
		if (get_user(val, p))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			if (val & PCM_ENABLE_INPUT) {
				if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
					return ret;
				s->dma_adc.enabled = 1;
				start_adc(s);
			} else {
				s->dma_adc.enabled = 0;
				stop_adc(s);
			}
		}
		if (file->f_mode & FMODE_WRITE) {
			if (val & PCM_ENABLE_OUTPUT) {
				if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
					return ret;
				s->dma_dac.enabled = 1;
				start_dac(s);
			} else {
				s->dma_dac.enabled = 0;
				stop_dac(s);
			}
		}
		return 0;

	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_dac.ready && (val = prog_dmabuf(s, 0)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		sv_update_ptr(s);
		abinfo.fragsize = s->dma_dac.fragsize;
		count = s->dma_dac.count;
		if (count < 0)
			count = 0;
                abinfo.bytes = s->dma_dac.dmasize - count;
                abinfo.fragstotal = s->dma_dac.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;      
		spin_unlock_irqrestore(&s->lock, flags);
		return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETISPACE:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!s->dma_adc.ready && (val = prog_dmabuf(s, 1)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		sv_update_ptr(s);
		abinfo.fragsize = s->dma_adc.fragsize;
		count = s->dma_adc.count;
		if (count < 0)
			count = 0;
                abinfo.bytes = count;
                abinfo.fragstotal = s->dma_adc.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;      
		spin_unlock_irqrestore(&s->lock, flags);
		return copy_to_user(argp, &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;
		if (!s->dma_dac.ready && (val = prog_dmabuf(s, 0)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		sv_update_ptr(s);
                count = s->dma_dac.count;
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		return put_user(count, p);

        case SNDCTL_DSP_GETIPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!s->dma_adc.ready && (val = prog_dmabuf(s, 1)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		sv_update_ptr(s);
                cinfo.bytes = s->dma_adc.total_bytes;
		count = s->dma_adc.count;
		if (count < 0)
			count = 0;
                cinfo.blocks = count >> s->dma_adc.fragshift;
                cinfo.ptr = s->dma_adc.hwptr;
		if (s->dma_adc.mapped)
			s->dma_adc.count &= s->dma_adc.fragsize-1;
		spin_unlock_irqrestore(&s->lock, flags);
		if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

        case SNDCTL_DSP_GETOPTR:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_dac.ready && (val = prog_dmabuf(s, 0)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		sv_update_ptr(s);
                cinfo.bytes = s->dma_dac.total_bytes;
		count = s->dma_dac.count;
		if (count < 0)
			count = 0;
                cinfo.blocks = count >> s->dma_dac.fragshift;
                cinfo.ptr = s->dma_dac.hwptr;
		if (s->dma_dac.mapped)
			s->dma_dac.count &= s->dma_dac.fragsize-1;
		spin_unlock_irqrestore(&s->lock, flags);
                if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

        case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE) {
			if ((val = prog_dmabuf(s, 0)))
				return val;
			return put_user(s->dma_dac.fragsize, p);
		}
		if ((val = prog_dmabuf(s, 1)))
			return val;
		return put_user(s->dma_adc.fragsize, p);

        case SNDCTL_DSP_SETFRAGMENT:
                if (get_user(val, p))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			s->dma_adc.ossfragshift = val & 0xffff;
			s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
			if (s->dma_adc.ossfragshift < 4)
				s->dma_adc.ossfragshift = 4;
			if (s->dma_adc.ossfragshift > 15)
				s->dma_adc.ossfragshift = 15;
			if (s->dma_adc.ossmaxfrags < 4)
				s->dma_adc.ossmaxfrags = 4;
		}
		if (file->f_mode & FMODE_WRITE) {
			s->dma_dac.ossfragshift = val & 0xffff;
			s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
			if (s->dma_dac.ossfragshift < 4)
				s->dma_dac.ossfragshift = 4;
			if (s->dma_dac.ossfragshift > 15)
				s->dma_dac.ossfragshift = 15;
			if (s->dma_dac.ossmaxfrags < 4)
				s->dma_dac.ossmaxfrags = 4;
		}
		return 0;

        case SNDCTL_DSP_SUBDIVIDE:
		if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
		    (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
			return -EINVAL;
                if (get_user(val, p))
			return -EFAULT;
		if (val != 1 && val != 2 && val != 4)
			return -EINVAL;
		if (file->f_mode & FMODE_READ)
			s->dma_adc.subdivision = val;
		if (file->f_mode & FMODE_WRITE)
			s->dma_dac.subdivision = val;
		return 0;

        case SOUND_PCM_READ_RATE:
		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, p);

        case SOUND_PCM_READ_CHANNELS:
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (SV_CFMT_STEREO << SV_CFMT_CSHIFT) 
					   : (SV_CFMT_STEREO << SV_CFMT_ASHIFT))) ? 2 : 1, p);

        case SOUND_PCM_READ_BITS:
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (SV_CFMT_16BIT << SV_CFMT_CSHIFT) 
					   : (SV_CFMT_16BIT << SV_CFMT_ASHIFT))) ? 16 : 8, p);

        case SOUND_PCM_WRITE_FILTER:
        case SNDCTL_DSP_SETSYNCRO:
        case SOUND_PCM_READ_FILTER:
                return -EINVAL;
		
	}
	return mixer_ioctl(s, cmd, arg);
}