satip-axe/kernel/arch/sh/boards/mach-st/mb705-audio.c

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/*
* arch/sh/boards/mach-st/mb705-audio.c
*
* Copyright (C) 2008 STMicroelectronics Limited
* Author: Pawel Moll <pawel.moll@st.com>
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* WARNING! This driver (so far) supports only mb705+mb680 duet.
* (SW2[1..4] should be OFF)
* In that case (mb705+mb680) audio outputs layout presents as follows:
*
* +--------------------------------------+
* | |
* | (S.I) (---) (---) (0.5) (0.6) | TOP
* | |
* | (---) (---) (---) (0.3) (0.4) |
* | |
* | (S.O) (---) (---) (0.1) (0.2) | BOTTOM
* | |
* +--------------------------------------+
* CN5 CN4 CN3 CN2 CN1
*
* where:
* - S.I - SPDIF input - PCM Reader #0
* - S.O - SPDIF output - SPDIF Player (HDMI)
* - 0.1-6 - audio outputs - PCM Player #0, channels 1 to 6
* (PCM Player #0 has 8-channels output, however only 3 pairs
* are available on pads)
*/
#include <linux/init.h>
#include <linux/stm/platform.h>
#include <linux/stm/stx7105.h>
#include <sound/stm.h>
#include <mach/common.h>
#include "mb705-epld.h"
struct mb705_audio_conv {
struct snd_stm_conv_converter *conv;
unsigned int reset_mask;
unsigned int mute_offset;
unsigned int mute_mask;
};
static struct mb705_audio_conv mb705_audio_spdif_input = {
.reset_mask = EPLD_AUDIO_RESET_SPDIFIN,
};
static struct mb705_audio_conv mb705_audio_8ch_dac = {
.reset_mask = EPLD_AUDIO_RESET_AUDDAC2,
.mute_offset = EPLD_AUDIO_DAC2,
.mute_mask = EPLD_AUDIO_DAC2_SMUTE,
};
static unsigned int mb705_audio_get_format(void *priv)
{
return SND_STM_FORMAT__I2S | SND_STM_FORMAT__SUBFRAME_32_BITS;
}
static int mb705_audio_get_oversampling(void *priv)
{
return 256;
}
static int mb705_audio_set_enabled(int enabled, void *priv)
{
struct mb705_audio_conv *data = priv;
unsigned int value = epld_read(EPLD_AUDIO_RESET);
if (enabled)
value &= ~data->reset_mask;
else
value |= data->reset_mask;
epld_write(value, EPLD_AUDIO_RESET);
return 0;
}
static int mb705_audio_set_muted(int muted, void *priv)
{
struct mb705_audio_conv *data = priv;
unsigned int value = epld_read(data->mute_offset);
if (muted)
value |= data->mute_mask;
else
value &= ~data->mute_mask;
epld_write(value, data->mute_offset);
return 0;
}
static struct snd_stm_conv_ops mb705_audio_enable_ops = {
.get_format = mb705_audio_get_format,
.get_oversampling = mb705_audio_get_oversampling,
.set_enabled = mb705_audio_set_enabled,
};
static struct snd_stm_conv_ops mb705_audio_enable_mute_ops = {
.get_format = mb705_audio_get_format,
.get_oversampling = mb705_audio_get_oversampling,
.set_enabled = mb705_audio_set_enabled,
.set_muted = mb705_audio_set_muted,
};
static int __init mb705_audio_init(void)
{
int pcm_reader, pcm_player;
static char *pcm_reader_bus_id = "snd_pcm_reader.x";
static char *pcm_player_bus_id = "snd_pcm_player.x";
/* To be defined in processor board, which knows what SOC is there... */
mbxxx_configure_audio_pins(&pcm_reader, &pcm_player);
if (pcm_reader < 0)
sprintf(pcm_reader_bus_id, "snd_pcm_reader");
else if (pcm_reader < 10)
sprintf(pcm_reader_bus_id, "snd_pcm_reader.%d", pcm_reader);
else
BUG();
if (pcm_player < 0)
sprintf(pcm_player_bus_id, "snd_pcm_player");
else if (pcm_player < 10)
sprintf(pcm_player_bus_id, "snd_pcm_player.%d", pcm_player);
else
BUG();
/* Check the SPDIF test mode */
if ((epld_read(EPLD_AUDIO_SWITCH2) & (EPLD_AUDIO_SWITCH1_SW21 |
EPLD_AUDIO_SWITCH1_SW22 | EPLD_AUDIO_SWITCH1_SW23 |
EPLD_AUDIO_SWITCH1_SW24)) == 0) {
printk(KERN_WARNING "WARNING! MB705 is in audio test mode!\n");
printk(KERN_WARNING "You won't hear any generated sound!\n");
}
/* Disable (enable reset) all converters */
epld_write(EPLD_AUDIO_RESET_AUDDAC0 | EPLD_AUDIO_RESET_AUDDAC1 |
EPLD_AUDIO_RESET_AUDDAC2 | EPLD_AUDIO_RESET_SPDIFIN |
EPLD_AUDIO_RESET_SPDIFOUT, EPLD_AUDIO_RESET);
/* Configure and register SPDIF-I2S converter (CS8416, IC5) */
epld_write(EPLD_AUDIO_SPDIFIN_C | EPLD_AUDIO_SPDIFIN_RCBL,
EPLD_AUDIO_SPDIFIN);
mb705_audio_spdif_input.conv = snd_stm_conv_register_converter("SPDIF"
" Input", &mb705_audio_enable_ops,
&mb705_audio_spdif_input, &platform_bus_type,
pcm_reader_bus_id, 0, 1, NULL);
if (!mb705_audio_spdif_input.conv) {
printk(KERN_ERR "%s:%u: Can't register SPDIF Input converter!"
"\n", __FILE__, __LINE__);
goto error;
}
/* Configure and register 8-channels external DAC (AK4359, IC1) */
epld_write(EPLD_AUDIO_DAC2_DIF0 | EPLD_AUDIO_DAC2_DIF1 |
EPLD_AUDIO_DAC2_SMUTE | EPLD_AUDIO_DAC2_ACKS |
EPLD_AUDIO_DAC2_DEM0 | EPLD_AUDIO_DAC2_PNOTS,
EPLD_AUDIO_DAC2);
mb705_audio_8ch_dac.conv = snd_stm_conv_register_converter("External "
"8-channels DAC", &mb705_audio_enable_mute_ops,
&mb705_audio_8ch_dac, &platform_bus_type,
pcm_player_bus_id, 0, 7, NULL);
if (!mb705_audio_8ch_dac.conv) {
printk(KERN_ERR "%s:%u: Can't register external 8-channels "
"DAC!\n", __FILE__, __LINE__);
goto error;
}
return 0;
error:
if (mb705_audio_8ch_dac.conv)
snd_stm_conv_unregister_converter(mb705_audio_8ch_dac.conv);
if (mb705_audio_spdif_input.conv)
snd_stm_conv_unregister_converter(mb705_audio_spdif_input.conv);
return -ENODEV;
}
static void __exit mb705_audio_exit(void)
{
/* Disable all converters, just to be sure ;-) */
epld_write(EPLD_AUDIO_RESET_AUDDAC0 | EPLD_AUDIO_RESET_AUDDAC1 |
EPLD_AUDIO_RESET_AUDDAC2 | EPLD_AUDIO_RESET_SPDIFIN |
EPLD_AUDIO_RESET_SPDIFOUT, EPLD_AUDIO_RESET);
/* Unregister converters */
snd_stm_conv_unregister_converter(mb705_audio_8ch_dac.conv);
snd_stm_conv_unregister_converter(mb705_audio_spdif_input.conv);
}
module_init(mb705_audio_init);
module_exit(mb705_audio_exit);