extractedLnx/linux-2.6.9/sound/oss/ite8172.c_it8172_ioctl.c

static int it8172_ioctl(struct inode *inode, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	struct it8172_state *s = (struct it8172_state *)file->private_data;
	unsigned long flags;
	audio_buf_info abinfo;
	count_info cinfo;
	int count;
	int val, mapped, ret, diff;

	mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
		((file->f_mode & FMODE_READ) && s->dma_adc.mapped);

#ifdef IT8172_VERBOSE_DEBUG
	for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
		if (ioctl_str[count].cmd == cmd)
			break;
	}
	if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0]))
		dbg("ioctl %s, arg=0x%08x",
		    ioctl_str[count].str, (unsigned int)arg);
	else
		dbg("ioctl unknown, 0x%x", cmd);
#endif
    
	switch (cmd) {
	case OSS_GETVERSION:
		return put_user(SOUND_VERSION, (int *)arg);

	case SNDCTL_DSP_SYNC:
		if (file->f_mode & FMODE_WRITE)
			return drain_dac(s, 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, (int *)arg);
		
	case SNDCTL_DSP_RESET:
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			synchronize_irq();
			s->dma_dac.count = s->dma_dac.total_bytes = 0;
			s->dma_dac.nextIn = s->dma_dac.nextOut =
				s->dma_dac.rawbuf;
		}
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			synchronize_irq();
			s->dma_adc.count = s->dma_adc.total_bytes = 0;
			s->dma_adc.nextIn = s->dma_adc.nextOut =
				s->dma_adc.rawbuf;
		}
		return 0;

	case SNDCTL_DSP_SPEED:
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (val >= 0) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				set_adc_rate(s, val);
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				set_dac_rate(s, val);
				if ((ret = prog_dmabuf_dac(s)))
					return ret;
			}
		}
		return put_user((file->f_mode & FMODE_READ) ?
				s->adcrate : s->dacrate, (int *)arg);

	case SNDCTL_DSP_STEREO:
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			if (val)
				s->capcc |= CC_SM;
			else
				s->capcc &= ~CC_SM;
			outw(s->capcc, s->io+IT_AC_CAPCC);
			if ((ret = prog_dmabuf_adc(s)))
				return ret;
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			if (val)
				s->pcc |= CC_SM;
			else
				s->pcc &= ~CC_SM;
			outw(s->pcc, s->io+IT_AC_PCC);
			if ((ret = prog_dmabuf_dac(s)))
				return ret;
		}
		return 0;

	case SNDCTL_DSP_CHANNELS:
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (val != 0) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				if (val >= 2) {
					val = 2;
					s->capcc |= CC_SM;
				}
				else
					s->capcc &= ~CC_SM;
				outw(s->capcc, s->io+IT_AC_CAPCC);
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				switch (val) {
				case 1:
					s->pcc &= ~CC_SM;
					break;
				case 2:
					s->pcc |= CC_SM;
					break;
				default:
					// FIX! support multichannel???
					val = 2;
					s->pcc |= CC_SM;
					break;
				}
				outw(s->pcc, s->io+IT_AC_PCC);
				if ((ret = prog_dmabuf_dac(s)))
					return ret;
			}
		}
		return put_user(val, (int *)arg);
		
	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
		return put_user(AFMT_S16_LE|AFMT_U8, (int *)arg);
		
	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (val != AFMT_QUERY) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				if (val == AFMT_S16_LE)
					s->capcc |= CC_DF;
				else {
					val = AFMT_U8;
					s->capcc &= ~CC_DF;
				}
				outw(s->capcc, s->io+IT_AC_CAPCC);
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				if (val == AFMT_S16_LE)
					s->pcc |= CC_DF;
				else {
					val = AFMT_U8;
					s->pcc &= ~CC_DF;
				}
				outw(s->pcc, s->io+IT_AC_PCC);
				if ((ret = prog_dmabuf_dac(s)))
					return ret;
			}
		} else {
			if (file->f_mode & FMODE_READ)
				val = (s->capcc & CC_DF) ?
					AFMT_S16_LE : AFMT_U8;
			else
				val = (s->pcc & CC_DF) ?
					AFMT_S16_LE : AFMT_U8;
		}
		return put_user(val, (int *)arg);
		
	case SNDCTL_DSP_POST:
		return 0;

	case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		spin_lock_irqsave(&s->lock, flags);
		if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
			val |= PCM_ENABLE_INPUT;
		if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
			val |= PCM_ENABLE_OUTPUT;
		spin_unlock_irqrestore(&s->lock, flags);
		return put_user(val, (int *)arg);
		
	case SNDCTL_DSP_SETTRIGGER:
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			if (val & PCM_ENABLE_INPUT)
				start_adc(s);
			else
				stop_adc(s);
		}
		if (file->f_mode & FMODE_WRITE) {
			if (val & PCM_ENABLE_OUTPUT)
				start_dac(s);
			else
				stop_dac(s);
		}
		return 0;

	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		abinfo.fragsize = s->dma_dac.fragsize;
		spin_lock_irqsave(&s->lock, flags);
		count = s->dma_dac.count;
		if (!s->dma_dac.stopped)
			count -= (s->dma_dac.fragsize -
				  inw(s->io+IT_AC_PCDL));
		spin_unlock_irqrestore(&s->lock, flags);
		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;      
		return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ?
			-EFAULT : 0;

	case SNDCTL_DSP_GETISPACE:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		abinfo.fragsize = s->dma_adc.fragsize;
		spin_lock_irqsave(&s->lock, flags);
		count = s->dma_adc.count;
		if (!s->dma_adc.stopped)
			count += (s->dma_adc.fragsize -
				  inw(s->io+IT_AC_CAPCDL));
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		abinfo.bytes = count;
		abinfo.fragstotal = s->dma_adc.numfrag;
		abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;      
		return copy_to_user((void *)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(&s->lock, flags);
		count = s->dma_dac.count;
		if (!s->dma_dac.stopped)
			count -= (s->dma_dac.fragsize -
				  inw(s->io+IT_AC_PCDL));
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		return put_user(count, (int *)arg);

	case SNDCTL_DSP_GETIPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		spin_lock_irqsave(&s->lock, flags);
		cinfo.bytes = s->dma_adc.total_bytes;
		count = s->dma_adc.count;
		if (!s->dma_adc.stopped) {
			diff = s->dma_adc.fragsize - inw(s->io+IT_AC_CAPCDL);
			count += diff;
			cinfo.bytes += diff;
			cinfo.ptr = inl(s->io+s->dma_adc.curBufPtr) -
				s->dma_adc.dmaaddr;
		} else
			cinfo.ptr = virt_to_bus(s->dma_adc.nextIn) -
				s->dma_adc.dmaaddr;
		if (s->dma_adc.mapped)
			s->dma_adc.count &= s->dma_adc.fragsize-1;
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		cinfo.blocks = count >> s->dma_adc.fragshift;
		return copy_to_user((void *)arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETOPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		spin_lock_irqsave(&s->lock, flags);
		cinfo.bytes = s->dma_dac.total_bytes;
		count = s->dma_dac.count;
		if (!s->dma_dac.stopped) {
			diff = s->dma_dac.fragsize - inw(s->io+IT_AC_CAPCDL);
			count -= diff;
			cinfo.bytes += diff;
			cinfo.ptr = inl(s->io+s->dma_dac.curBufPtr) -
				s->dma_dac.dmaaddr;
		} else
			cinfo.ptr = virt_to_bus(s->dma_dac.nextOut) -
				s->dma_dac.dmaaddr;
		if (s->dma_dac.mapped)
			s->dma_dac.count &= s->dma_dac.fragsize-1;
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		cinfo.blocks = count >> s->dma_dac.fragshift;
		return copy_to_user((void *)arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE)
			return put_user(s->dma_dac.fragsize, (int *)arg);
		else
			return put_user(s->dma_adc.fragsize, (int *)arg);

	case SNDCTL_DSP_SETFRAGMENT:
		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			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 ((ret = prog_dmabuf_adc(s)))
				return ret;
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			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;
			if ((ret = prog_dmabuf_dac(s)))
				return ret;
		}
		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, (int *)arg))
			return -EFAULT;
		if (val != 1 && val != 2 && val != 4)
			return -EINVAL;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			s->dma_adc.subdivision = val;
			if ((ret = prog_dmabuf_adc(s)))
				return ret;
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			s->dma_dac.subdivision = val;
			if ((ret = prog_dmabuf_dac(s)))
				return ret;
		}
		return 0;

	case SOUND_PCM_READ_RATE:
		return put_user((file->f_mode & FMODE_READ) ?
				s->adcrate : s->dacrate, (int *)arg);

	case SOUND_PCM_READ_CHANNELS:
		if (file->f_mode & FMODE_READ)
			return put_user((s->capcc & CC_SM) ? 2 : 1,
					(int *)arg);
		else
			return put_user((s->pcc & CC_SM) ? 2 : 1,
					(int *)arg);
	    
	case SOUND_PCM_READ_BITS:
		if (file->f_mode & FMODE_READ)
			return put_user((s->capcc & CC_DF) ? 16 : 8,
					(int *)arg);
		else
			return put_user((s->pcc & CC_DF) ? 16 : 8,
					(int *)arg);

	case SOUND_PCM_WRITE_FILTER:
	case SNDCTL_DSP_SETSYNCRO:
	case SOUND_PCM_READ_FILTER:
		return -EINVAL;
	}

	return mixdev_ioctl(s->codec, cmd, arg);
}