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/init.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/asound.h>
#include <sound/memalloc.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
#include <asm/firmware.h>
#include <asm/dma.h>
#include <asm/lv1call.h>
#include <asm/ps3.h>
#include <asm/ps3av.h>

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

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("PS3 sound driver");
MODULE_AUTHOR("Sony Computer Entertainment Inc.");

/* module  entries */
static int __init snd_ps3_init(void);
static void __exit snd_ps3_exit(void);

/* ALSA snd driver ops */
static int snd_ps3_pcm_open(struct snd_pcm_substream *substream);
static int snd_ps3_pcm_close(struct snd_pcm_substream *substream);
static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream);
static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
				 int cmd);
static snd_pcm_uframes_t snd_ps3_pcm_pointer(struct snd_pcm_substream
					     *substream);
static int snd_ps3_pcm_hw_params(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *hw_params);
static int snd_ps3_pcm_hw_free(struct snd_pcm_substream *substream);


/* ps3_system_bus_driver entries */
static int __init snd_ps3_driver_probe(struct ps3_system_bus_device *dev);
static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev);

/* address setup */
static int snd_ps3_map_mmio(void);
static void snd_ps3_unmap_mmio(void);
static int snd_ps3_allocate_irq(void);
static void snd_ps3_free_irq(void);
static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start);

/* interrupt handler */
static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id);


/* set sampling rate/format */
static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream);
/* take effect parameter change */
static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card);
/* initialize avsetting and take it effect */
static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card);
/* setup dma */
static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
			       enum snd_ps3_dma_filltype filltype);
static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card);

static dma_addr_t v_to_bus(struct snd_ps3_card_info *, void  *vaddr, int ch);


module_init(snd_ps3_init);
module_exit(snd_ps3_exit);

/*
 * 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 milisec");

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) |