size_t count, loff_t * ppos){	const char *buffer0 = buffer;	audio_stream_t *s = &output_stream;	int chunksize, ret = 0;	DPRINTK("audio_write : start count=%d\n", count);	switch (file->f_flags & O_ACCMODE) {		case O_WRONLY:		case O_RDWR:		break;		default:			return -EPERM;	}	if (!s->buffers && audio_setup_buf(s))		return -ENOMEM;	count &= ~0x03;	while (count > 0) {		audio_buf_t *b = s->buf;		if (file->f_flags & O_NONBLOCK) {			ret = -EAGAIN;			if (down_trylock(&b->sem))				break;		} else {			ret = -ERESTARTSYS;			if (down_interruptible(&b->sem))			break;		}		if (audio_channels == 2) {			chunksize = s->fragsize - b->size;			if (chunksize > count)			chunksize = count;			DPRINTK("write %d to %d\n", chunksize, s->buf_idx);			if (copy_from_user(b->start + b->size, buffer, chunksize)) {				up(&b->sem);				return -EFAULT;			}			b->size += chunksize;		} else {			chunksize = (s->fragsize - b->size) >> 1;			if (chunksize > count)			chunksize = count;			DPRINTK("write %d to %d\n", chunksize*2, s->buf_idx);			if (copy_from_user_mono_stereo(b->start + b->size,buffer, chunksize)) {			up(&b->sem);			return -EFAULT;			}			b->size += chunksize*2;		}		buffer += chunksize;		count -= chunksize;		if (b->size < s->fragsize) {		up(&b->sem);		break;		}		if((ret = s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, b->size))) {			printk(PFX"dma enqueue failed.\n");			return ret;		}		b->size = 0;		NEXT_BUF(s, buf);	}	if ((buffer - buffer0))	ret = buffer - buffer0;	DPRINTK("audio_write : end count=%d\n\n", ret);	return ret;}static ssize_t smdk2410_audio_read(struct file *file, char *buffer,size_t count, loff_t * ppos){	const char *buffer0 = buffer;	audio_stream_t *s = &input_stream;	int chunksize, ret = 0;	DPRINTK("audio_read: count=%d\n", count);/*	if (ppos != &file->f_pos)	return -ESPIPE;*/	if (!s->buffers) {		int i;		if (audio_setup_buf(s))			return -ENOMEM;		for (i = 0; i < s->nbfrags; i++) {			audio_buf_t *b = s->buf;			down(&b->sem);			s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, s->fragsize);			NEXT_BUF(s, buf);		}	}	while (count > 0) {		audio_buf_t *b = s->buf;/* Wait for a buffer to become full */		if (file->f_flags & O_NONBLOCK) {			ret = -EAGAIN;			if (down_trylock(&b->sem))				break;		} else {				ret = -ERESTARTSYS;				if (down_interruptible(&b->sem))				break;		}		chunksize = b->size;		if (chunksize > count)			chunksize = count;		DPRINTK("read %d from %d\n", chunksize, s->buf_idx);		if (copy_to_user(buffer, b->start + s->fragsize - b->size,chunksize)) {			up(&b->sem);			return -EFAULT;		}		b->size -= chunksize;		buffer += chunksize;		count -= chunksize;		if (b->size > 0) {			up(&b->sem);			break;		}/* Make current buffer available for DMA again */		s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, s->fragsize);		NEXT_BUF(s, buf);	}	if ((buffer - buffer0))	ret = buffer - buffer0;	// DPRINTK("audio_read: return=%d\n", ret);	return ret;}static unsigned int smdk2410_audio_poll(struct file *file,struct poll_table_struct *wait){unsigned int mask = 0;int i;DPRINTK("audio_poll(): mode=%s\n",(file->f_mode & FMODE_WRITE) ? "w" : "");if (file->f_mode & FMODE_READ) {if (!input_stream.buffers && audio_setup_buf(&input_stream))return -ENOMEM;poll_wait(file, &input_stream.buf->sem.wait, wait);for (i = 0; i < input_stream.nbfrags; i++) {if (atomic_read(&input_stream.buffers[i].sem.count) > 0)mask |= POLLIN | POLLWRNORM;break;}}if (file->f_mode & FMODE_WRITE) {if (!output_stream.buffers && audio_setup_buf(&output_stream))return -ENOMEM;poll_wait(file, &output_stream.buf->sem.wait, wait);for (i = 0; i < output_stream.nbfrags; i++) {if (atomic_read(&output_stream.buffers[i].sem.count) > 0)mask |= POLLOUT | POLLWRNORM;break;}}DPRINTK("audio_poll() returned mask of %s\n",(mask & POLLOUT) ? "w" : "");return mask;}static loff_t smdk2410_audio_llseek(struct file *file, loff_t offset,int origin){return -ESPIPE;}static int smdk2410_mixer_ioctl(struct inode *inode, struct file *file,unsigned int cmd, unsigned long arg){int ret;long val = 0;switch (cmd) {case SOUND_MIXER_INFO:{mixer_info info;strncpy(info.id, "UDA1341", sizeof(info.id));strncpy(info.name,"Philips UDA1341", sizeof(info.name));info.modify_counter = audio_mix_modcnt;return copy_to_user((void *)arg, &info, sizeof(info));}case SOUND_OLD_MIXER_INFO:{_old_mixer_info info;strncpy(info.id, "UDA1341", sizeof(info.id));strncpy(info.name,"Philips UDA1341", sizeof(info.name));return copy_to_user((void *)arg, &info, sizeof(info));}case SOUND_MIXER_READ_STEREODEVS:return put_user(0, (long *) arg);case SOUND_MIXER_READ_CAPS:val = SOUND_CAP_EXCL_INPUT;return put_user(val, (long *) arg);case SOUND_MIXER_WRITE_VOLUME:ret = get_user(val, (long *) arg);if (ret)return ret;uda1341_volume = 63 - (((val & 0xff) + 1) * 63) / 100;uda1341_l3_address(UDA1341_REG_DATA0);uda1341_l3_data(uda1341_volume);break;case SOUND_MIXER_READ_VOLUME:val = ((63 - uda1341_volume) * 100) / 63;val |= val << 8;return put_user(val, (long *) arg);case SOUND_MIXER_READ_IGAIN:val = ((31- mixer_igain) * 100) / 31;return put_user(val, (int *) arg);case SOUND_MIXER_WRITE_IGAIN:ret = get_user(val, (int *) arg);if (ret)return ret;mixer_igain = 31 - (val * 31 / 100);/* use mixer gain channel 1*/uda1341_l3_address(UDA1341_REG_DATA0);uda1341_l3_data(EXTADDR(EXT0));uda1341_l3_data(EXTDATA(EXT0_CH1_GAIN(mixer_igain)));break;default:DPRINTK("mixer ioctl %u unknown\n", cmd);return -ENOSYS;}audio_mix_modcnt++;return 0;}static int iispsr_value(int s_bit_clock, int sample_rate){int i, prescaler = 0;unsigned long tmpval;unsigned long tmpval384;unsigned long tmpval384min = 0xffff;tmpval384 = clk_get_rate(iis_clock) / s_bit_clock;for (i = 0; i < 32; i++) {tmpval = tmpval384/(i+1);if (PCM_ABS((sample_rate - tmpval)) < tmpval384min) {tmpval384min = PCM_ABS((sample_rate - tmpval));prescaler = i;}}DPRINTK("prescaler = %d\n", prescaler);return prescaler;}static long audio_set_dsp_speed(long val){unsigned int prescaler;prescaler=(IISPSR_A(iispsr_value(S_CLOCK_FREQ, val))| IISPSR_B(iispsr_value(S_CLOCK_FREQ, val)));writel(prescaler, iis_base + S3C2410_IISPSR);printk(PFX "audio_set_dsp_speed:%ld prescaler:%i\n",val,prescaler);return (audio_rate = val);}static int smdk2410_audio_ioctl(struct inode *inode, struct file *file,uint cmd, ulong arg){long val;switch (cmd) {case SNDCTL_DSP_SETFMT:get_user(val, (long *) arg);if (val & AUDIO_FMT_MASK) {audio_fmt = val;break;} elsereturn -EINVAL;case SNDCTL_DSP_CHANNELS:case SNDCTL_DSP_STEREO:get_user(val, (long *) arg);if (cmd == SNDCTL_DSP_STEREO)val = val ? 2 : 1;if (val != 1 && val != 2)return -EINVAL;audio_channels = val;break;case SOUND_PCM_READ_CHANNELS:put_user(audio_channels, (long *) arg);break;case SNDCTL_DSP_SPEED:get_user(val, (long *) arg);val = audio_set_dsp_speed(val);if (val < 0)return -EINVAL;put_user(val, (long *) arg);break;case SOUND_PCM_READ_RATE:put_user(audio_rate, (long *) arg);break;case SNDCTL_DSP_GETFMTS:put_user(AUDIO_FMT_MASK, (long *) arg);break;case SNDCTL_DSP_GETBLKSIZE:if(file->f_mode & FMODE_WRITE)return put_user(audio_fragsize, (long *) arg);elsereturn put_user(audio_fragsize, (int *) arg);case SNDCTL_DSP_SETFRAGMENT:if (file->f_mode & FMODE_WRITE) {if (output_stream.buffers)return -EBUSY;get_user(val, (long *) arg);audio_fragsize = 1 << (val & 0xFFFF);if (audio_fragsize < 16)audio_fragsize = 16;if (audio_fragsize > 16384)audio_fragsize = 16384;audio_nbfrags = (val >> 16) & 0x7FFF;if (audio_nbfrags < 2)audio_nbfrags = 2;if (audio_nbfrags * audio_fragsize > 128 * 1024)audio_nbfrags = 128 * 1024 / audio_fragsize;if (audio_setup_buf(&output_stream))return -ENOMEM;}if (file->f_mode & FMODE_READ) {if (input_stream.buffers)return -EBUSY;get_user(val, (int *) arg);audio_fragsize = 1 << (val & 0xFFFF);if (audio_fragsize < 16)audio_fragsize = 16;if (audio_fragsize > 16384)audio_fragsize = 16384;audio_nbfrags = (val >> 16) & 0x7FFF;if (audio_nbfrags < 2)audio_nbfrags = 2;if (audio_nbfrags * audio_fragsize > 128 * 1024)audio_nbfrags = 128 * 1024 / audio_fragsize;if (audio_setup_buf(&input_stream))return -ENOMEM;}break;case SNDCTL_DSP_SYNC:return audio_sync(file);case SNDCTL_DSP_GETOSPACE:{audio_stream_t *s = &output_stream;audio_buf_info *inf = (audio_buf_info *) arg;int err = access_ok(VERIFY_WRITE, inf, sizeof(*inf));int i;int frags = 0, bytes = 0;if (err)return err;for (i = 0; i < s->nbfrags; i++) {if (atomic_read(&s->buffers[i].sem.count) > 0) {if (s->buffers[i].size == 0) frags++;bytes += s->fragsize - s->buffers[i].size;}}put_user(frags, &inf->fragments);put_user(s->nbfrags, &inf->fragstotal);put_user(s->fragsize, &inf->fragsize);put_user(bytes, &inf->bytes);break;}case SNDCTL_DSP_GETISPACE:{audio_stream_t *s = &input_stream;audio_buf_info *inf = (audio_buf_info *) arg;int err = access_ok(VERIFY_WRITE, inf, sizeof(*inf));int i;int frags = 0, bytes = 0;if (!(file->f_mode & FMODE_READ))return -EINVAL;if (err)return err;