es1371.c

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				s->sctrl |= SCTRL_R1SMB;
			else
				s->sctrl &= ~SCTRL_R1SMB;
			outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
			spin_unlock_irqrestore(&s->lock, flags);
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac2(s);
			s->dma_dac2.ready = 0;
			spin_lock_irqsave(&s->lock, flags);
			if (val)
				s->sctrl |= SCTRL_P2SMB;
			else
				s->sctrl &= ~SCTRL_P2SMB;
			outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
			spin_unlock_irqrestore(&s->lock, flags);
                }
		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);
				s->dma_adc.ready = 0;
				spin_lock_irqsave(&s->lock, flags);
				if (val >= 2)
					s->sctrl |= SCTRL_R1SMB;
				else
					s->sctrl &= ~SCTRL_R1SMB;
				outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
				spin_unlock_irqrestore(&s->lock, flags);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac2(s);
				s->dma_dac2.ready = 0;
				spin_lock_irqsave(&s->lock, flags);
				if (val >= 2)
					s->sctrl |= SCTRL_P2SMB;
				else
					s->sctrl &= ~SCTRL_P2SMB;
				outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
				spin_unlock_irqrestore(&s->lock, flags);
			}
		}
		return put_user((s->sctrl & ((file->f_mode & FMODE_READ) ? SCTRL_R1SMB : SCTRL_P2SMB)) ? 2 : 1, (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);
				s->dma_adc.ready = 0;
				spin_lock_irqsave(&s->lock, flags);
				if (val == AFMT_S16_LE)
					s->sctrl |= SCTRL_R1SEB;
				else
					s->sctrl &= ~SCTRL_R1SEB;
				outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
				spin_unlock_irqrestore(&s->lock, flags);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac2(s);
				s->dma_dac2.ready = 0;
				spin_lock_irqsave(&s->lock, flags);
				if (val == AFMT_S16_LE)
					s->sctrl |= SCTRL_P2SEB;
				else
					s->sctrl &= ~SCTRL_P2SEB;
				outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
				spin_unlock_irqrestore(&s->lock, flags);
			}
		}
		return put_user((s->sctrl & ((file->f_mode & FMODE_READ) ? SCTRL_R1SEB : SCTRL_P2SEB)) ? 
				AFMT_S16_LE : AFMT_U8, (int *)arg);
		
	case SNDCTL_DSP_POST:
                return 0;

        case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		if (file->f_mode & FMODE_READ && s->ctrl & CTRL_ADC_EN) 
			val |= PCM_ENABLE_INPUT;
		if (file->f_mode & FMODE_WRITE && s->ctrl & CTRL_DAC2_EN) 
			val |= PCM_ENABLE_OUTPUT;
		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) {
				if (!s->dma_adc.ready && (ret = prog_dmabuf_adc(s)))
					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_dac2.ready && (ret = prog_dmabuf_dac2(s)))
					return ret;
				s->dma_dac2.enabled = 1;
				start_dac2(s);
			} else {
				s->dma_dac2.enabled = 0;
				stop_dac2(s);
			}
		}
		return 0;

	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_dac2.ready && (val = prog_dmabuf_dac2(s)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		es1371_update_ptr(s);
		abinfo.fragsize = s->dma_dac2.fragsize;
		count = s->dma_dac2.count;
		if (count < 0)
			count = 0;
                abinfo.bytes = s->dma_dac2.dmasize - count;
                abinfo.fragstotal = s->dma_dac2.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_dac2.fragshift;      
		spin_unlock_irqrestore(&s->lock, flags);
		return copy_to_user((void *)arg, &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_adc(s)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		es1371_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((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;
		if (!s->dma_dac2.ready && (val = prog_dmabuf_dac2(s)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		es1371_update_ptr(s);
                count = s->dma_dac2.count;
		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;
		if (!s->dma_adc.ready && (val = prog_dmabuf_adc(s)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		es1371_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);
                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));

        case SNDCTL_DSP_GETOPTR:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_dac2.ready && (val = prog_dmabuf_dac2(s)) != 0)
			return val;
		spin_lock_irqsave(&s->lock, flags);
		es1371_update_ptr(s);
                cinfo.bytes = s->dma_dac2.total_bytes;
		count = s->dma_dac2.count;
		if (count < 0)
			count = 0;
                cinfo.blocks = count >> s->dma_dac2.fragshift;
                cinfo.ptr = s->dma_dac2.hwptr;
		if (s->dma_dac2.mapped)
			s->dma_dac2.count &= s->dma_dac2.fragsize-1;
		spin_unlock_irqrestore(&s->lock, flags);
                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));

        case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE) {
			if ((val = prog_dmabuf_dac2(s)))
				return val;
			return put_user(s->dma_dac2.fragsize, (int *)arg);
		}
		if ((val = prog_dmabuf_adc(s)))
			return val;
		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) {
			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_dac2.ossfragshift = val & 0xffff;
			s->dma_dac2.ossmaxfrags = (val >> 16) & 0xffff;
			if (s->dma_dac2.ossfragshift < 4)
				s->dma_dac2.ossfragshift = 4;
			if (s->dma_dac2.ossfragshift > 15)
				s->dma_dac2.ossfragshift = 15;
			if (s->dma_dac2.ossmaxfrags < 4)
				s->dma_dac2.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_dac2.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)
			s->dma_adc.subdivision = val;
		if (file->f_mode & FMODE_WRITE)
			s->dma_dac2.subdivision = val;
		return 0;

        case SOUND_PCM_READ_RATE:
		return put_user((file->f_mode & FMODE_READ) ? s->adcrate : s->dac2rate, (int *)arg);

        case SOUND_PCM_READ_CHANNELS:
		return put_user((s->sctrl & ((file->f_mode & FMODE_READ) ? SCTRL_R1SMB : SCTRL_P2SMB)) ? 2 : 1, (int *)arg);
		
        case SOUND_PCM_READ_BITS:
		return put_user((s->sctrl & ((file->f_mode & FMODE_READ) ? SCTRL_R1SEB : SCTRL_P2SEB)) ? 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);
}

static int es1371_open(struct inode *inode, struct file *file)
{
	int minor = MINOR(inode->i_rdev);
	DECLARE_WAITQUEUE(wait, current);
	unsigned long flags;
	struct list_head *list;
	struct es1371_state *s;

	for (list = devs.next; ; list = list->next) {
		if (list == &devs)
			return -ENODEV;
		s = list_entry(list, struct es1371_state, devs);
		if (!((s->dev_audio ^ minor) & ~0xf))
			break;
	}
       	VALIDATE_STATE(s);
	file->private_data = s;
	/* wait for device to become free */
	down(&s->open_sem);
	while (s->open_mode & file->f_mode) {
		if (file->f_flags & O_NONBLOCK) {
			up(&s->open_sem);
			return -EBUSY;
		}
		add_wait_queue(&s->open_wait, &wait);
		__set_current_state(TASK_INTERRUPTIBLE);
		up(&s->open_sem);
		schedule();
		remove_wait_queue(&s->open_wait, &wait);
		set_current_state(TASK_RUNNING);
		if (signal_pending(current))
			return -ERESTARTSYS;
		down(&s->open_sem);
	}
	if (file->f_mode & FMODE_READ) {
		s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags = s->dma_adc.subdivision = 0;
		s->dma_adc.enabled = 1;
		set_adc_rate(s, 8000);
	}
	if (file->f_mode & FMODE_WRITE) {
		s->dma_dac2.ossfragshift = s->dma_dac2.ossmaxfrags = s->dma_dac2.subdivision = 0;
		s->dma_dac2.enabled = 1;
		set_dac2_rate(s, 8000);
	}
	spin_lock_irqsave(&s->lock, flags);
	if (file->f_mode & FMODE_READ) {
		s->sctrl &= ~SCTRL_R1FMT;
		if ((minor & 0xf) == SND_DEV_DSP16)
			s->sctrl |= ES1371_FMT_S16_MONO << SCTRL_SH_R1FMT;
		else
			s->sctrl |= ES1371_FMT_U8_MONO << SCTRL_SH_R1FMT;
	}
	if (file->f_mode & FMODE_WRITE) {
		s->sctrl &= ~SCTRL_P2FMT;
		if ((minor & 0xf) == SND_DEV_DSP16)
			s->sctrl |= ES1371_FMT_S16_MONO << SCTRL_SH_P2FMT;
		else
			s->sctrl |= ES1371_FMT_U8_MONO << SCTRL_SH_P2FMT;
	}
	outl(s->sctrl, s->io+ES1371_REG_SERIAL_CONTROL);
	spin_unlock_irqrestore(&s->lock, flags);
	s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
	up(&s->open_sem);
	init_MUTEX(&s->sem);
	return 0;
}

static int es1371_release(struct inode *inode, struct file *file)
{
	struct es1371_state *s = (struct es1371_state *)file->private_data;

	VALIDATE_STATE(s);
	lock_kernel();
	if (file->f_mode & FMODE_WRITE)
		drain_dac2(s, file->f_flags & O_NONBLOCK);
	down(&s->open_sem);
	if (file->f_mode & FMODE_WRITE) {
		stop_dac2(s);
		dealloc_dmabuf(s, &s->dma_dac2);
	}
	if (file->f_mode & FMODE_READ) {
		stop_adc(s);
		dealloc_dmabuf(s, &s->dma_adc);
	}
	s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
	up(&s->open_sem);
	wake_up(&s->open_wait);
	unlock_kernel();
	return 0;
}

static /*const*/ struct file_operations es1371_audio_fops = {
	owner:		THIS_MODULE,
	llseek:		no_llseek,
	read:		es1371_read,
	write:		es1371_write,
	poll:		es1371_poll,
	ioctl:		es1371_ioctl,
	mmap:		es1371_mmap,
	open:		es1371_open,
	release:	es1371_release,
};

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

static ssize_t es1371_write_dac(struct file *file, const char *buffer, size_t count, loff_t *ppos)
{
	struct es1371_state *s = (struct es1371_state *)file->private_data;
	DECLARE_WAITQUEUE(wait, current);
	ssize_t ret = 0;
	unsigned long flags;
	unsigned swptr;
	int cnt;

	VALIDATE_STATE(s);
	if (ppos != &file->f_pos)
		return -ESPIPE;
	if (s->dma_dac1.mapped)
		return -ENXIO;
	if (!s->dma_dac1.ready && (ret = prog_dmabuf_dac1(s)))
		return ret;
	if (!access_ok(VERIFY_READ, buffer, count))
		return -EFAULT;
	add_wait_queue(&s->dma_dac1.wait, &wait);
	while (count > 0) {
		spin_lock_irqsave(&s->lock, flags);
		if (s->dma_dac1.count < 0) {
			s->dma_dac1.count = 0;
			s->dma_dac1.swptr = s->dma_dac1.hwptr;
		}
		swptr = s->dma_dac1.swptr;
		cnt = s->dma_dac1.dmasize-swptr;
		if (s->dma_dac1.count + cnt > s->dma_dac1.dmasize)
			cnt = s->dma_dac1.dmasize -