/*
 * sound/pas2_mixer.c
 * 
 * Mixer routines for the Pro Audio Spectrum cards.
 * 
 * Copyright by Hannu Savolainen 1993
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer. 2.
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 */

#define _PAS2_MIXER_C_

#include <i386/isa/sound/sound_config.h>

#if defined(CONFIG_PAS)

#include <i386/isa/sound/pas_hw.h>

#define TRACE(what)		/* (what) */

extern int      translat_code;
extern char     pas_model;
extern sound_os_info *pas_osp;

static int      rec_devices = (SOUND_MASK_MIC);	/* Default recording source */
static int      mode_control = 0;

#define POSSIBLE_RECORDING_DEVICES	(SOUND_MASK_SYNTH | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
					 SOUND_MASK_CD | SOUND_MASK_ALTPCM)

#define SUPPORTED_MIXER_DEVICES		(SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
					 SOUND_MASK_CD | SOUND_MASK_ALTPCM | SOUND_MASK_IMIX | \
					 SOUND_MASK_VOLUME | SOUND_MASK_BASS | SOUND_MASK_TREBLE | SOUND_MASK_RECLEV | \
					 SOUND_MASK_MUTE | SOUND_MASK_ENHANCE | SOUND_MASK_LOUD)

static u_short levels[SOUND_MIXER_NRDEVICES] =
{
	0x3232,			/* Master Volume */
	0x3232,			/* Bass */
	0x3232,			/* Treble */
	0x5050,			/* FM */
	0x4b4b,			/* PCM */
	0x3232,			/* PC Speaker */
	0x4b4b,			/* Ext Line */
	0x4b4b,			/* Mic */
	0x4b4b,			/* CD */
	0x6464,			/* Recording monitor */
	0x4b4b,			/* SB PCM */
	0x6464			/* Recording level */
};

void
mix_write(u_char data, int ioaddr)
{
	/*
	 * The Revision D cards have a problem with their MVA508 interface.
	 * The kludge-o-rama fix is to make a 16-bit quantity with identical
	 * LSB and MSBs out of the output byte and to do a 16-bit out to the
	 * mixer port - 1. We need to do this because it isn't timing problem
	 * but chip access sequence problem.
	 */

	if (pas_model == PAS_16D) {
		outw((ioaddr ^ translat_code) - 1, data | (data << 8));
		outb(0, 0x80);
	} else
		pas_write(data, ioaddr);
}

static int
mixer_output(int right_vol, int left_vol, int div, int bits,
	     int mixer)
{				/* Input or output mixer */
	int             left = left_vol * div / 100;
	int             right = right_vol * div / 100;


	if (bits & P_M_MV508_MIXER) {	/* Select input or output mixer */
		left |= mixer;
		right |= mixer;
	}
	if (bits == P_M_MV508_BASS || bits == P_M_MV508_TREBLE) {	/* Bass and treble are
									 * mono devices */
		mix_write(P_M_MV508_ADDRESS | bits, PARALLEL_MIXER);
		mix_write(left, PARALLEL_MIXER);
		right_vol = left_vol;
	} else {
		mix_write(P_M_MV508_ADDRESS | P_M_MV508_LEFT | bits, PARALLEL_MIXER);
		mix_write(left, PARALLEL_MIXER);
		mix_write(P_M_MV508_ADDRESS | P_M_MV508_RIGHT | bits, PARALLEL_MIXER);
		mix_write(right, PARALLEL_MIXER);
	}

	return (left_vol | (right_vol << 8));
}

static void
set_mode(int new_mode)
{
	mix_write(P_M_MV508_ADDRESS | P_M_MV508_MODE, PARALLEL_MIXER);
	mix_write(new_mode, PARALLEL_MIXER);

	mode_control = new_mode;
}

static int
pas_mixer_set(int whichDev, u_int level)
{
	int             left, right, devmask, changed, i, mixer = 0;

	TRACE(printf("static int pas_mixer_set(int whichDev = %d, u_int level = %X)\n", whichDev, level));

	left = level & 0x7f;
	right = (level & 0x7f00) >> 8;

	if (whichDev < SOUND_MIXER_NRDEVICES)
		if ((1 << whichDev) & rec_devices)
			mixer = P_M_MV508_INPUTMIX;
		else
			mixer = P_M_MV508_OUTPUTMIX;

	switch (whichDev) {
	case SOUND_MIXER_VOLUME:	/* Master volume (0-63) */
		levels[whichDev] = mixer_output(right, left, 63, P_M_MV508_MASTER_A, 0);
		break;

		/*
		 * Note! Bass and Treble are mono devices. Will use just the
		 * left channel.
		 */
	case SOUND_MIXER_BASS:	/* Bass (0-12) */
		levels[whichDev] = mixer_output(right, left, 12, P_M_MV508_BASS, 0);
		break;
	case SOUND_MIXER_TREBLE:	/* Treble (0-12) */
		levels[whichDev] = mixer_output(right, left, 12, P_M_MV508_TREBLE, 0);
		break;

	case SOUND_MIXER_SYNTH:/* Internal synthesizer (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_FM, mixer);
		break;
	case SOUND_MIXER_PCM:	/* PAS PCM (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_PCM, mixer);
		break;
	case SOUND_MIXER_ALTPCM:	/* SB PCM (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_SB, mixer);
		break;
	case SOUND_MIXER_SPEAKER:	/* PC speaker (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_SPEAKER, mixer);
		break;
	case SOUND_MIXER_LINE:	/* External line (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_LINE, mixer);
		break;
	case SOUND_MIXER_CD:	/* CD (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_CDROM, mixer);
		break;
	case SOUND_MIXER_MIC:	/* External microphone (0-31) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_MIC, mixer);
		break;
	case SOUND_MIXER_IMIX:	/* Recording monitor (0-31) (Output mixer
				 * only) */
		levels[whichDev] = mixer_output(right, left, 31, P_M_MV508_MIXER | P_M_MV508_IMIXER,
						P_M_MV508_OUTPUTMIX);
		break;
	case SOUND_MIXER_RECLEV:	/* Recording level (0-15) */
		levels[whichDev] = mixer_output(right, left, 15, P_M_MV508_MASTER_B, 0);
		break;

	case SOUND_MIXER_MUTE:
		return 0;
		break;

	case SOUND_MIXER_ENHANCE:
		i = 0;
		level &= 0x7f;
		if (level)
			i = (level / 20) - 1;

		mode_control &= ~P_M_MV508_ENHANCE_BITS;
		mode_control |= P_M_MV508_ENHANCE_BITS;
		set_mode(mode_control);

		if (i)
			i = (i + 1) * 20;
		return i;
		break;

	case SOUND_MIXER_LOUD:
		mode_control &= ~P_M_MV508_LOUDNESS;
		if (level)
			mode_control |= P_M_MV508_LOUDNESS;
		set_mode(mode_control);
		return !!level;	/* 0 or 1 */
		break;

	case SOUND_MIXER_RECSRC:
		devmask = level & POSSIBLE_RECORDING_DEVICES;

		changed = devmask ^ rec_devices;
		rec_devices = devmask;

		for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
			if (changed & (1 << i)) {
				pas_mixer_set(i, levels[i]);
			}
		return rec_devices;
		break;

	default:
		return -(EINVAL);
	}

	return (levels[whichDev]);
}

/*****/

static void
pas_mixer_reset(void)
{
	int             foo;

	TRACE(printf("pas2_mixer.c: void pas_mixer_reset(void)\n"));

	for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
		pas_mixer_set(foo, levels[foo]);

	set_mode(P_M_MV508_LOUDNESS | P_M_MV508_ENHANCE_40);
}

static int
pas_mixer_ioctl(int dev, u_int cmd, ioctl_arg arg)
{
	TRACE(printf("pas2_mixer.c: int pas_mixer_ioctl(u_int cmd = %X, u_int arg = %X)\n", cmd, arg));

	if (((cmd >> 8) & 0xff) == 'M') {
		if (cmd & IOC_IN)
			return *(int *) arg = pas_mixer_set(cmd & 0xff, (*(int *) arg));
		else {		/* Read parameters */

			switch (cmd & 0xff) {

			case SOUND_MIXER_RECSRC:
				return *(int *) arg = rec_devices;
				break;

			case SOUND_MIXER_STEREODEVS:
				return *(int *) arg = SUPPORTED_MIXER_DEVICES & ~(SOUND_MASK_BASS | SOUND_MASK_TREBLE);
				break;

			case SOUND_MIXER_DEVMASK:
				return *(int *) arg = SUPPORTED_MIXER_DEVICES;
				break;

			case SOUND_MIXER_RECMASK:
				return *(int *) arg = POSSIBLE_RECORDING_DEVICES & SUPPORTED_MIXER_DEVICES;
				break;

			case SOUND_MIXER_CAPS:
				return *(int *) arg = 0;	/* No special
								 * capabilities */
				break;

			case SOUND_MIXER_MUTE:
				return *(int *) arg = 0;	/* No mute yet */
				break;

			case SOUND_MIXER_ENHANCE:
				if (!(mode_control & P_M_MV508_ENHANCE_BITS))
					return *(int *) arg = 0;
				return *(int *) arg = ((mode_control & P_M_MV508_ENHANCE_BITS) + 1) * 20;
				break;

			case SOUND_MIXER_LOUD:
				if (mode_control & P_M_MV508_LOUDNESS)
					return *(int *) arg = 1;
				return *(int *) arg = 0;
				break;

			default:
				return *(int *) arg = levels[cmd & 0xff];
			}
		}
	}
	return -(EINVAL);
}

static struct mixer_operations pas_mixer_operations =
{
	"Pro Audio Spectrum 16",
	pas_mixer_ioctl
};

int
pas_init_mixer(void)
{
	pas_mixer_reset();

	if (num_mixers < MAX_MIXER_DEV)
		mixer_devs[num_mixers++] = &pas_mixer_operations;
	return 1;
}

#endif
