extractedLnx/linux-2.6.9/sound/oss/maestro.c_ess_ioctl.c

static int ess_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	struct ess_state *s = (struct ess_state *)file->private_data;
	unsigned long flags;
        audio_buf_info abinfo;
        count_info cinfo;
	int val, mapped, ret;
	unsigned char fmtm, fmtd;
	void __user *argp = (void __user *)arg;
	int __user *p = argp;

/*	printk("maestro: ess_ioctl: cmd %d\n", cmd);*/
	
	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:
		return put_user(SOUND_VERSION, p);

	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:
		/* XXX fix */
		return 0;

	case SNDCTL_DSP_GETCAPS:
		return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | DSP_CAP_MMAP, p);
		
        case SNDCTL_DSP_RESET:
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			synchronize_irq(s->card->pcidev->irq);
			s->dma_dac.swptr = s->dma_dac.hwptr = s->dma_dac.count = s->dma_dac.total_bytes = 0;
		}
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			synchronize_irq(s->card->pcidev->irq);
			s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0;
		}
		return 0;

        case SNDCTL_DSP_SPEED:
                if (get_user(val, p))
			return -EFAULT;
		if (val >= 0) {
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				set_adc_rate(s, val);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				set_dac_rate(s, val);
			}
		}
		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, p);
		
        case SNDCTL_DSP_STEREO:
		if (get_user(val, p))
			return -EFAULT;
		fmtd = 0;
		fmtm = ~0;
		if (file->f_mode & FMODE_READ) {
			stop_adc(s);
			s->dma_adc.ready = 0;
			if (val)
				fmtd |= ESS_FMT_STEREO << ESS_ADC_SHIFT;
			else
				fmtm &= ~(ESS_FMT_STEREO << ESS_ADC_SHIFT);
		}
		if (file->f_mode & FMODE_WRITE) {
			stop_dac(s);
			s->dma_dac.ready = 0;
			if (val)
				fmtd |= ESS_FMT_STEREO << ESS_DAC_SHIFT;
			else
				fmtm &= ~(ESS_FMT_STEREO << ESS_DAC_SHIFT);
		}
		set_fmt(s, fmtm, fmtd);
		return 0;

        case SNDCTL_DSP_CHANNELS:
                if (get_user(val, p))
			return -EFAULT;
		if (val != 0) {
			fmtd = 0;
			fmtm = ~0;
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
				if (val >= 2)
					fmtd |= ESS_FMT_STEREO << ESS_ADC_SHIFT;
				else
					fmtm &= ~(ESS_FMT_STEREO << ESS_ADC_SHIFT);
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val >= 2)
					fmtd |= ESS_FMT_STEREO << ESS_DAC_SHIFT;
				else
					fmtm &= ~(ESS_FMT_STEREO << ESS_DAC_SHIFT);
			}
			set_fmt(s, fmtm, fmtd);
		}
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (ESS_FMT_STEREO << ESS_ADC_SHIFT) 
					   : (ESS_FMT_STEREO << ESS_DAC_SHIFT))) ? 2 : 1, p);
		
	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
                return put_user(AFMT_U8|AFMT_S16_LE, p);
		
	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
		if (get_user(val, p))
			return -EFAULT;
		if (val != AFMT_QUERY) {
			fmtd = 0;
			fmtm = ~0;
			if (file->f_mode & FMODE_READ) {
				stop_adc(s);
				s->dma_adc.ready = 0;
	/* fixed at 16bit for now */
				fmtd |= ESS_FMT_16BIT << ESS_ADC_SHIFT;
#if 0
				if (val == AFMT_S16_LE)
					fmtd |= ESS_FMT_16BIT << ESS_ADC_SHIFT;
				else
					fmtm &= ~(ESS_FMT_16BIT << ESS_ADC_SHIFT);
#endif
			}
			if (file->f_mode & FMODE_WRITE) {
				stop_dac(s);
				s->dma_dac.ready = 0;
				if (val == AFMT_S16_LE)
					fmtd |= ESS_FMT_16BIT << ESS_DAC_SHIFT;
				else
					fmtm &= ~(ESS_FMT_16BIT << ESS_DAC_SHIFT);
			}
			set_fmt(s, fmtm, fmtd);
		}
 		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? 
			(ESS_FMT_16BIT << ESS_ADC_SHIFT) 
			: (ESS_FMT_16BIT << ESS_DAC_SHIFT))) ? 
				AFMT_S16_LE : 
				AFMT_U8, 
			p);
		
	case SNDCTL_DSP_POST:
                return 0;

        case SNDCTL_DSP_GETTRIGGER:
		val = 0;
		if ((file->f_mode & FMODE_READ) && (s->enable & ADC_RUNNING))
			val |= PCM_ENABLE_INPUT;
		if ((file->f_mode & FMODE_WRITE) && (s->enable & DAC_RUNNING)) 
			val |= PCM_ENABLE_OUTPUT;
		return put_user(val, p);
		
	case SNDCTL_DSP_SETTRIGGER:
		if (get_user(val, p))
			return -EFAULT;
		if (file->f_mode & FMODE_READ) {
			if (val & PCM_ENABLE_INPUT) {
				if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
					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(s, 0)))
					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_dac.ready && (ret = prog_dmabuf(s, 0)))
			return ret;
		spin_lock_irqsave(&s->lock, flags);
		ess_update_ptr(s);
		abinfo.fragsize = s->dma_dac.fragsize;
                abinfo.bytes = s->dma_dac.dmasize - s->dma_dac.count;
                abinfo.fragstotal = s->dma_dac.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;      
		spin_unlock_irqrestore(&s->lock, flags);
		return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETISPACE:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
			return ret;
		spin_lock_irqsave(&s->lock, flags);
		ess_update_ptr(s);
		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(argp, &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_dac.ready && (ret = prog_dmabuf(s, 0)))
			return ret;
		spin_lock_irqsave(&s->lock, flags);
		ess_update_ptr(s);
                val = s->dma_dac.count;
		spin_unlock_irqrestore(&s->lock, flags);
		return put_user(val, p);

        case SNDCTL_DSP_GETIPTR:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
			return ret;
		spin_lock_irqsave(&s->lock, flags);
		ess_update_ptr(s);
                cinfo.bytes = s->dma_adc.total_bytes;
                cinfo.blocks = s->dma_adc.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);
		if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

        case SNDCTL_DSP_GETOPTR:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
			return ret;
		spin_lock_irqsave(&s->lock, flags);
		ess_update_ptr(s);
                cinfo.bytes = s->dma_dac.total_bytes;
                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);
		if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
			return -EFAULT;
		return 0;

        case SNDCTL_DSP_GETBLKSIZE:
		if (file->f_mode & FMODE_WRITE) {
			if ((val = prog_dmabuf(s, 0)))
				return val;
			return put_user(s->dma_dac.fragsize, p);
		}
		if ((val = prog_dmabuf(s, 1)))
			return val;
		return put_user(s->dma_adc.fragsize, p);

        case SNDCTL_DSP_SETFRAGMENT:
                if (get_user(val, p))
			return -EFAULT;
		M_printk("maestro: SETFRAGMENT: %0x\n",val);
		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_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;
		}
		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, p))
			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_dac.subdivision = val;
		return 0;

        case SOUND_PCM_READ_RATE:
		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, p);

        case SOUND_PCM_READ_CHANNELS:
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (ESS_FMT_STEREO << ESS_ADC_SHIFT) 
					   : (ESS_FMT_STEREO << ESS_DAC_SHIFT))) ? 2 : 1, p);

        case SOUND_PCM_READ_BITS:
		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (ESS_FMT_16BIT << ESS_ADC_SHIFT) 
					   : (ESS_FMT_16BIT << ESS_DAC_SHIFT))) ? 16 : 8, p);

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