extractedLnx/linux/drivers/sound/cs4281.c_cs4281_ioctl.c

static int cs4281_ioctl(struct inode *inode, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	struct cs4281_state *s =
	    (struct cs4281_state *) file->private_data;
	unsigned long flags;
	audio_buf_info abinfo;
	count_info cinfo;
	int val, mapped, ret;

	CS_DBGOUT(CS_FUNCTION, 4,
		  printk(KERN_INFO
			 "cs4281: cs4281_ioctl(): file=0x%.8x cmd=0x%.8x\n",
			 (unsigned) file, cmd));
#if CSDEBUG
	printioctl(cmd);
#endif
	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:
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
							 "cs4281: cs4281_ioctl(): SOUND_VERSION=0x%.8x\n",
							 SOUND_VERSION));
		return put_user(SOUND_VERSION, (int *) arg);

	case SNDCTL_DSP_SYNC:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_SYNC\n"));
		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,
				(int *) arg);

	case SNDCTL_DSP_RESET:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_RESET\n"));
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			synchronize_irq();
			s->dma_dac.swptr = s->dma_dac.hwptr =
			    s->dma_dac.count = s->dma_dac.total_bytes =
			    s->dma_dac.blocks = s->dma_dac.wakeup = 0;
			prog_codec(s, CS_TYPE_DAC);
		}
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			synchronize_irq();
			s->dma_adc.swptr = s->dma_adc.hwptr =
			    s->dma_adc.count = s->dma_adc.total_bytes =
			    s->dma_adc.blocks = s->dma_dac.wakeup = 0;
			prog_codec(s, CS_TYPE_ADC);
		}
		return 0;

	case SNDCTL_DSP_SPEED:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_SPEED val=%d\n",
				 val));
		//
		// support independent capture and playback channels
		// assume that the file mode bit determines the 
		// direction of the data flow.
		//
		if (file->f_mode & FMODE_READ) {
			if (val >= 0) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				// program sampling rates 
				if (val > 48000)
					val = 48000;
				if (val < 6300)
					val = 6300;
				s->prop_adc.rate = val;
				prog_codec(s, CS_TYPE_ADC);
			}
		}
		if (file->f_mode & FMODE_WRITE) {
			if (val >= 0) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				// program sampling rates 
				if (val > 48000)
					val = 48000;
				if (val < 6300)
					val = 6300;
				s->prop_dac.rate = val;
				prog_codec(s, CS_TYPE_DAC);
			}
		}

		if (file->f_mode & FMODE_WRITE)
			val = s->prop_dac.rate;
		else if (file->f_mode & FMODE_READ)
			val = s->prop_adc.rate;

		return put_user(val, (int *) arg);

	case SNDCTL_DSP_STEREO:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_STEREO val=%d\n",
				 val));
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			s->dma_adc.ready = 0;
			s->prop_adc.channels = val ? 2 : 1;
			prog_codec(s, CS_TYPE_ADC);
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			s->dma_dac.ready = 0;
			s->prop_dac.channels = val ? 2 : 1;
			prog_codec(s, CS_TYPE_DAC);
		}
		return 0;

	case SNDCTL_DSP_CHANNELS:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_CHANNELS val=%d\n",
				 val));
		if (val != 0) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				if (val >= 2)
					s->prop_adc.channels = 2;
				else
					s->prop_adc.channels = 1;
				prog_codec(s, CS_TYPE_ADC);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val >= 2)
					s->prop_dac.channels = 2;
				else
					s->prop_dac.channels = 1;
				prog_codec(s, CS_TYPE_DAC);
			}
		}

		if (file->f_mode & FMODE_WRITE)
			val = s->prop_dac.channels;
		else if (file->f_mode & FMODE_READ)
			val = s->prop_adc.channels;

		return put_user(val, (int *) arg);

	case SNDCTL_DSP_GETFMTS:	// Returns a mask 
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_GETFMT val=0x%.8x\n",
				 AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
				 AFMT_U8));
		return put_user(AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
				AFMT_U8, (int *) arg);

	case SNDCTL_DSP_SETFMT:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_SETFMT val=0x%.8x\n",
				 val));
		if (val != AFMT_QUERY) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				if (val != AFMT_S16_LE
				    && val != AFMT_U16_LE && val != AFMT_S8
				    && val != AFMT_U8)
					val = AFMT_U8;
				s->prop_adc.fmt = val;
				s->prop_adc.fmt_original = s->prop_adc.fmt;
				prog_codec(s, CS_TYPE_ADC);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val != AFMT_S16_LE
				    && val != AFMT_U16_LE && val != AFMT_S8
				    && val != AFMT_U8)
					val = AFMT_U8;
				s->prop_dac.fmt = val;
				s->prop_dac.fmt_original = s->prop_dac.fmt;
				prog_codec(s, CS_TYPE_DAC);
			}
		} else {
			if (file->f_mode & FMODE_WRITE)
				val = s->prop_dac.fmt_original;
			else if (file->f_mode & FMODE_READ)
				val = s->prop_adc.fmt_original;
		}
		CS_DBGOUT(CS_IOCTL | CS_PARMS, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_SETFMT return val=0x%.8x\n",
				 val));
		return put_user(val, (int *) arg);

	case SNDCTL_DSP_POST:
		CS_DBGOUT(CS_IOCTL, 4,
			  printk(KERN_INFO
				 "cs4281: cs4281_ioctl(): DSP_POST\n"));
		return 0;

	case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		if (file->f_mode & s->ena & FMODE_READ)
			val |= PCM_ENABLE_INPUT;
		if (file->f_mode & s->ena & FMODE_WRITE)
			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;
				start_adc(s);
			} else
				stop_adc(s);
		}
		if (file->f_mode & FMODE_WRITE) {
			if (val & PCM_ENABLE_OUTPUT) {
				if (!s->dma_dac.ready
				    && (ret = prog_dmabuf_dac(s)))
					return ret;
				start_dac(s);
			} else
				stop_dac(s);
		}
		return 0;

	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_adc.ready && (val = prog_dmabuf_adc(s)))
			return val;
		spin_lock_irqsave(&s->lock, flags);
		cs4281_update_ptr(s);
		abinfo.fragsize = s->dma_dac.fragsize;
		if (s->dma_dac.mapped)
			abinfo.bytes = s->dma_dac.dmasize;
		else
			abinfo.bytes =
			    s->dma_dac.dmasize - s->dma_dac.count;
		abinfo.fragstotal = s->dma_dac.numfrag;
		abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
		CS_DBGOUT(CS_FUNCTION | CS_PARMS, 4, printk(KERN_INFO
							    "cs4281: cs4281_ioctl(): GETOSPACE .fragsize=%d .bytes=%d .fragstotal=%d .fragments=%d\n",
							    abinfo.
							    fragsize,
							    abinfo.bytes,
							    abinfo.
							    fragstotal,
							    abinfo.
							    fragments));
		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_dac.ready && (val = prog_dmabuf_dac(s)))
			return val;
		spin_lock_irqsave(&s->lock, flags);
		cs4281_update_ptr(s);
		if (s->conversion) {
			abinfo.fragsize = s->dma_adc.fragsize / 2;
			abinfo.bytes = s->dma_adc.count / 2;
			abinfo.fragstotal = s->dma_adc.numfrag;
			abinfo.fragments =
			    abinfo.bytes >> (s->dma_adc.fragshift - 1);
		} else {
			abinfo.fragsize = s->dma_adc.fragsize;
			abinfo.bytes = s->dma_adc.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_adc.ready && (val = prog_dmabuf_adc(s)))
			return val;
		spin_lock_irqsave(&s->lock, flags);
		cs4281_update_ptr(s);
		val = s->dma_dac.count;
		spin_unlock_irqrestore(&s->lock, flags);
		return put_user(val, (int *) arg);

	case SNDCTL_DSP_GETIPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!s->dma_dac.ready && (val = prog_dmabuf_dac(s)))
			return val;
		spin_lock_irqsave(&s->lock, flags);
		cs4281_update_ptr(s);
		cinfo.bytes = s->dma_adc.total_bytes;
		if (s->dma_adc.mapped) {
			cinfo.blocks =
			    (cinfo.bytes >> s->dma_adc.fragshift) -
			    s->dma_adc.blocks;
			s->dma_adc.blocks =
			    cinfo.bytes >> s->dma_adc.fragshift;
		} else {
			if (s->conversion) {
				cinfo.blocks =
				    s->dma_adc.count /
				    2 >> (s->dma_adc.fragshift - 1);
			} else
				cinfo.blocks =
				    s->dma_adc.count >> s->dma_adc.
				    fragshift;
		}
		if (s->conversion)
			cinfo.ptr = s->dma_adc.hwptr / 2;
		else
			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_adc.ready && (val = prog_dmabuf_adc(s)))
			return val;
		spin_lock_irqsave(&s->lock, flags);
		cs4281_update_ptr(s);
		cinfo.bytes = s->dma_dac.total_bytes;
		if (s->dma_dac.mapped) {
			cinfo.blocks =
			    (cinfo.bytes >> s->dma_dac.fragshift) -
			    s->dma_dac.blocks;
			s->dma_dac.blocks =
			    cinfo.bytes >> s->dma_dac.fragshift;
		} else {
			cinfo.blocks =
			    s->dma_dac.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);
		return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));

	case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE) {
			if ((val = prog_dmabuf_dac(s)))
				return val;
			return put_user(s->dma_dac.fragsize, (int *) arg);
		}
		if ((val = prog_dmabuf_adc(s)))
			return val;
		if (s->conversion)
			return put_user(s->dma_adc.fragsize / 2,
					(int *) arg);
		else
			return put_user(s->dma_adc.fragsize, (int *) arg);

	case SNDCTL_DSP_SETFRAGMENT:
		if (get_user(val, (int *) arg))
			return -EFAULT;
		return 0;	// Say OK, but do nothing.

	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)
			s->dma_adc.subdivision = val;
		else if (file->f_mode & FMODE_WRITE)
			s->dma_dac.subdivision = val;
		return 0;

	case SOUND_PCM_READ_RATE:
		if (file->f_mode & FMODE_READ)
			return put_user(s->prop_adc.rate, (int *) arg);
		else if (file->f_mode & FMODE_WRITE)
			return put_user(s->prop_dac.rate, (int *) arg);

	case SOUND_PCM_READ_CHANNELS:
		if (file->f_mode & FMODE_READ)
			return put_user(s->prop_adc.channels, (int *) arg);
		else if (file->f_mode & FMODE_WRITE)
			return put_user(s->prop_dac.channels, (int *) arg);

	case SOUND_PCM_READ_BITS:
		if (file->f_mode & FMODE_READ)
			return
			    put_user(
				     (s->prop_adc.
				      fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
				     (int *) arg);
		else if (file->f_mode & FMODE_WRITE)
			return
			    put_user(
				     (s->prop_dac.
				      fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
				     (int *) arg);

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

#if CSDEBUG_INTERFACE

	case SNDCTL_DSP_CS_GETDBGMASK:
		return put_user(cs_debugmask, (unsigned long *) arg);

	case SNDCTL_DSP_CS_GETDBGLEVEL:
		return put_user(cs_debuglevel, (unsigned long *) arg);

	case SNDCTL_DSP_CS_SETDBGMASK:
		if (get_user(val, (unsigned long *) arg))
			return -EFAULT;
		cs_debugmask = val;
		return 0;

	case SNDCTL_DSP_CS_SETDBGLEVEL:
		if (get_user(val, (unsigned long *) arg))
			return -EFAULT;
		cs_debuglevel = val;
		return 0;
#endif

	}
	return mixer_ioctl(s, cmd, arg);
}