path: root/sound/ppc/snd_ps3.c

/*
 * Audio support for PS3
 * Copyright (C) 2007 Sony Computer Entertainment Inc.
 * All rights reserved.
 * Copyright 2006, 2007 Sony Corporation
 *
 * 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; version 2 of the Licence.
 *
 * 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 <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>

#include <sound/asound.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/memalloc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include <asm/dma.h>
#include <asm/firmware.h>
#include <asm/lv1call.h>
#include <asm/ps3.h>
#include <asm/ps3av.h>

#include "snd_ps3.h"
#include "snd_ps3_reg.h"


/*
 * global
 */
static struct snd_ps3_card_info the_card;

static int snd_ps3_start_delay = CONFIG_SND_PS3_DEFAULT_START_DELAY;

module_param_named(start_delay, snd_ps3_start_delay, uint, 0644);
MODULE_PARM_DESC(start_delay, "time to insert silent data in ms");

static int index = SNDRV_DEFAULT_IDX1;
static char *id = SNDRV_DEFAULT_STR1;

module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for PS3 soundchip.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for PS3 soundchip.");


/*
 * PS3 audio register access
 */
static inline u32 read_reg(unsigned int reg)
{
	return in_be32(the_card.mapped_mmio_vaddr + reg);
}
static inline void write_reg(unsigned int reg, u32 val)
{
	out_be32(the_card.mapped_mmio_vaddr + reg, val);
}
static inline void update_reg(unsigned int reg, u32 or_val)
{
	u32 newval = read_reg(reg) | or_val;
	write_reg(reg, newval);
}
static inline void update_mask_reg(unsigned int reg, u32 mask, u32 or_val)
{
	u32 newval = (read_reg(reg) & mask) | or_val;
	write_reg(reg, newval);
}

/*
 * ALSA defs
 */
static const struct snd_pcm_hardware snd_ps3_pcm_hw = {
	.info = (SNDRV_PCM_INFO_MMAP |
		 SNDRV_PCM_INFO_NONINTERLEAVED |
		 SNDRV_PCM_INFO_MMAP_VALID),
	.formats = (SNDRV_PCM_FMTBIT_S16_BE |
		    SNDRV_PCM_FMTBIT_S24_BE),
	.rates = (SNDRV_PCM_RATE_44100 |
		  SNDRV_PCM_RATE_48000 |
		  SNDRV_PCM_RATE_88200 |
		  SNDRV_PCM_RATE_96000),
	.rate_min = 44100,
	.rate_max = 96000,

	.channels_min = 2, /* stereo only */
	.channels_max = 2,

	.buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64,

	/* interrupt by four stages */
	.period_bytes_min = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
	.period_bytes_max = PS3_AUDIO_FIFO_STAGE_SIZE * 4,

	.periods_min = 16,
	.periods_max = 32, /* buffer_size_max/ period_bytes_max */

	.fifo_size = PS3_AUDIO_FIFO_SIZE
};

static int snd_ps3_verify_dma_stop(struct snd_ps3_card_info *card,
				   int count, int force_stop)
{
	int dma_ch, done, retries, stop_forced = 0;
	uint32_t status;

	for (dma_ch = 0; dma_ch < 8; dma_ch++) {
		retries = count;
		do {
			s