path: root/sound/ppc/awacs.c

/*
 * PMac AWACS lowlevel functions
 *
 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
 * code based on dmasound.c.
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */


#include <asm/io.h>
#include <asm/nvram.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include "pmac.h"


#ifdef CONFIG_ADB_CUDA
#define PMAC_AMP_AVAIL
#endif

#ifdef PMAC_AMP_AVAIL
struct awacs_amp {
	unsigned char amp_master;
	unsigned char amp_vol[2][2];
	unsigned char amp_tone[2];
};

#define CHECK_CUDA_AMP() (sys_ctrler == SYS_CTRLER_CUDA)

#endif /* PMAC_AMP_AVAIL */


static void snd_pmac_screamer_wait(struct snd_pmac *chip)
{
	long timeout = 2000;
	while (!(in_le32(&chip->awacs->codec_stat) & MASK_VALID)) {
		mdelay(1);
		if (! --timeout) {
			snd_printd("snd_pmac_screamer_wait timeout\n");
			break;
		}
	}
}

/*
 * write AWACS register
 */
static void
snd_pmac_awacs_write(struct snd_pmac *chip, int val)
{
	long timeout = 5000000;

	if (chip->model == PMAC_SCREAMER)
		snd_pmac_screamer_wait(chip);
	out_le32(&chip->awacs->codec_ctrl, val | (chip->subframe << 22));
	while (in_le32(&chip->awacs->codec_ctrl) & MASK_NEWECMD) {
		if (! --timeout) {
			snd_printd("snd_pmac_awacs_write timeout\n");
			break;
		}
	}
}

static void
snd_pmac_awacs_write_reg(struct snd_pmac *chip, int reg, int val)
{
	snd_pmac_awacs_write(chip, val | (reg << 12));
	chip->awacs_reg[reg] = val;
}

static void
snd_pmac_awacs_write_noreg(struct snd_pmac *chip, int reg, int val)
{
	snd_pmac_awacs_write(chip, val | (reg << 12));
}

#ifdef CONFIG_PM
/* Recalibrate chip */
static void screamer_recalibrate(struct snd_pmac *chip)
{
	if (chip->model != PMAC_SCREAMER)
		return;

	/* Sorry for the horrible delays... I hope to get that improved
	 * by making the whole PM process asynchronous in a future version
	 */
	snd_pmac_awacs_write_noreg(chip, 1, chip->awacs_reg[1]);
	if (chip->manufacturer == 0x1)
		/* delay for broken crystal part */
		msleep(750);
	snd_pmac_awacs_write_noreg(chip, 1,
				   chip->awacs_reg[1] | MASK_RECALIBRATE |
				   MASK_CMUTE | MASK_AMUTE);
	snd_pmac_awacs_write_noreg(chip, 1, chip->awacs_reg[1]);
	snd_pmac_awacs_write_noreg(chip, 6, chip->awacs_reg[6]);
}

#else
#define screamer_recalibrate(chip) /* NOP */
#endif


/*
 * additional callback to set the pcm format
 */
static void snd_pmac_awacs_set_format(struct snd_pmac *chip)
{
	chip->awacs_reg[1] &= ~MASK_SAMPLERATE;
	chip->awacs_reg[1] |= chip->rate_index << 3;
	snd_pmac_awacs_write_reg(chip, 1, chip->awacs_reg[1]);
}


/*
 * AWACS volume callbacks
 */
/*
 * volumes: 0-15 stereo
 */
static int snd_pmac_awacs_info_volume(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 15;
	return 0;
}

static int snd_pmac_awacs_get_volume(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int lshift = (kcontrol->private_value >>