extractedLnx/linux-2.6.9/sound/oss/au1000.c_au1000_ioctl.c

static int au1000_ioctl(struct inode *inode, struct file *file,
                        unsigned int cmd, unsigned long arg)
{
	struct au1000_state *s = (struct au1000_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 AU1000_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%lx", ioctl_str[count].str, arg);
	else
		dbg("ioctl 0x%x unknown, arg=0x%lx", cmd, arg);
#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 (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				set_dac_rate(s, val);
			}
			if (s->open_mode & FMODE_READ)
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			if (s->open_mode & FMODE_WRITE)
				if ((ret = prog_dmabuf_dac(s)))
					return ret;
		}
		return put_user((file->f_mode & FMODE_READ) ?
				s->dma_adc.sample_rate :
				s->dma_dac.sample_rate,
				(int *)arg);

	case SNDCTL_DSP_STEREO:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			s->dma_adc.num_channels = val ? 2 : 1;
			if ((ret = prog_dmabuf_adc(s)))
				return ret;
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			s->dma_dac.num_channels = val ? 2 : 1;
			if (s->codec_ext_caps & AC97_EXT_DACS) {
				// disable surround and center/lfe in AC'97
				u16 ext_stat = rdcodec(s->codec,
						       AC97_EXTENDED_STATUS);
				wrcodec(s->codec, AC97_EXTENDED_STATUS,
					ext_stat | (AC97_EXTSTAT_PRI |
						    AC97_EXTSTAT_PRJ |
						    AC97_EXTSTAT_PRK));
			}
			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) {
				if (val < 0 || val > 2)
					return -EINVAL;
				stop_adc(s);
				s->dma_adc.num_channels = val;
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			}
			if (file->f_mode & FMODE_WRITE) {
				switch (val) {
				case 1:
				case 2:
					break;
				case 3:
				case 5:
					return -EINVAL;
				case 4:
					if (!(s->codec_ext_caps &
					      AC97_EXTID_SDAC))
						return -EINVAL;
					break;
				case 6:
					if ((s->codec_ext_caps &
					     AC97_EXT_DACS) != AC97_EXT_DACS)
						return -EINVAL;
					break;
				default:
					return -EINVAL;
				}

				stop_dac(s);
				if (val <= 2 &&
				    (s->codec_ext_caps & AC97_EXT_DACS)) {
					// disable surround and center/lfe
					// channels in AC'97
					u16             ext_stat =
						rdcodec(s->codec,
							AC97_EXTENDED_STATUS);
					wrcodec(s->codec,
						AC97_EXTENDED_STATUS,
						ext_stat | (AC97_EXTSTAT_PRI |
							    AC97_EXTSTAT_PRJ |
							    AC97_EXTSTAT_PRK));
				} else if (val >= 4) {
					// enable surround, center/lfe
					// channels in AC'97
					u16             ext_stat =
						rdcodec(s->codec,
							AC97_EXTENDED_STATUS);
					ext_stat &= ~AC97_EXTSTAT_PRJ;
					if (val == 6)
						ext_stat &=
							~(AC97_EXTSTAT_PRI |
							  AC97_EXTSTAT_PRK);
					wrcodec(s->codec,
						AC97_EXTENDED_STATUS,
						ext_stat);
				}

				s->dma_dac.num_channels = val;
				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->dma_adc.sample_size = 16;
				else {
					val = AFMT_U8;
					s->dma_adc.sample_size = 8;
				}
				if ((ret = prog_dmabuf_adc(s)))
					return ret;
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				if (val == AFMT_S16_LE)
					s->dma_dac.sample_size = 16;
				else {
					val = AFMT_U8;
					s->dma_dac.sample_size = 8;
				}
				if ((ret = prog_dmabuf_dac(s)))
					return ret;
			}
		} else {
			if (file->f_mode & FMODE_READ)
				val = (s->dma_adc.sample_size == 16) ?
					AFMT_S16_LE : AFMT_U8;
			else
				val = (s->dma_dac.sample_size == 16) ?
					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;
		count -= dma_count_done(&s->dma_dac);
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		abinfo.bytes = (s->dma_dac.dmasize - count) /
			s->dma_dac.cnt_factor;
		abinfo.fragstotal = s->dma_dac.numfrag;
		abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
#ifdef AU1000_VERBOSE_DEBUG
		dbg("bytes=%d, fragments=%d", abinfo.bytes, abinfo.fragments);
#endif
		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;
		count += dma_count_done(&s->dma_adc);
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		abinfo.bytes = count / s->dma_adc.cnt_factor;
		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;
		count -= dma_count_done(&s->dma_dac);
		spin_unlock_irqrestore(&s->lock, flags);
		if (count < 0)
			count = 0;
		count /= s->dma_dac.cnt_factor;
		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 = dma_count_done(&s->dma_adc);
			count += diff;
			cinfo.bytes += diff;
			cinfo.ptr =  virt_to_phys(s->dma_adc.nextIn) + diff -
				s->dma_adc.dmaaddr;
		} else
			cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
				s->dma_adc.dmaaddr;
		if (s->dma_adc.mapped)
			s->dma_adc.count &= (s->dma_adc.dma_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 = dma_count_done(&s->dma_dac);
			count -= diff;
			cinfo.bytes += diff;
			cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
				s->dma_dac.dmaaddr;
		} else
			cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
				s->dma_dac.dmaaddr;
		if (s->dma_dac.mapped)
			s->dma_dac.count &= (s->dma_dac.dma_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->dma_adc.sample_rate :
				s->dma_dac.sample_rate,
				(int *)arg);

	case SOUND_PCM_READ_CHANNELS:
		if (file->f_mode & FMODE_READ)
			return put_user(s->dma_adc.num_channels, (int *)arg);
		else
			return put_user(s->dma_dac.num_channels, (int *)arg);

	case SOUND_PCM_READ_BITS:
		if (file->f_mode & FMODE_READ)
			return put_user(s->dma_adc.sample_size, (int *)arg);
		else
			return put_user(s->dma_dac.sample_size, (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);
}