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SOUND: SAMSUNG: Add I2S driver

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This patch adds driver for I2S interface specific to samsung.

Signed-off-by: R. Chandrasekar <rcsekar@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
master
Rajeshwari Shinde 12 years ago committed by Minkyu Kang
parent d984b9f89c
commit 511ed5fdd3
6 changed files with 823 additions and 0 deletions
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  1. 1
      Makefile
  2. 47
      drivers/sound/Makefile
  3. 358
      drivers/sound/samsung-i2s.c
  4. 228
      drivers/sound/sound.c
  5. 127
      include/i2s.h
  6. 62
      include/sound.h

1
Makefile
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@ -313,6 +313,7 @@ LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
endif
LIBS-y += drivers/rtc/librtc.o
LIBS-y += drivers/serial/libserial.o
LIBS-y += drivers/sound/libsound.o
LIBS-$(CONFIG_GENERIC_LPC_TPM) += drivers/tpm/libtpm.o
LIBS-y += drivers/twserial/libtws.o
LIBS-y += drivers/usb/eth/libusb_eth.o

47
drivers/sound/Makefile
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#
# Copyright (C) 2012 Samsung Electronics
# R. Chandrasekar <rcsekar@samsung.com>
#
# See file CREDITS for list of people who contributed to this
# project.
#
# 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 $(TOPDIR)/config.mk
LIB := $(obj)libsound.o
COBJS-$(CONFIG_SOUND) += sound.o
COBJS-$(CONFIG_I2S) += samsung-i2s.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
all: $(LIB)
$(LIB): $(obj).depend $(OBJS)
$(call cmd_link_o_target, $(OBJS))
#########################################################################
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
#

358
drivers/sound/samsung-i2s.c
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/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar <rcsekar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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/arch/clk.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/i2s-regs.h>
#include <asm/io.h>
#include <common.h>
#include <sound.h>
#include <i2s.h>
#define FIC_TX2COUNT(x) (((x) >> 24) & 0xf)
#define FIC_TX1COUNT(x) (((x) >> 16) & 0xf)
#define FIC_TXCOUNT(x) (((x) >> 8) & 0xf)
#define FIC_RXCOUNT(x) (((x) >> 0) & 0xf)
#define FICS_TXCOUNT(x) (((x) >> 8) & 0x7f)
#define TIMEOUT_I2S_TX 100 /* i2s transfer timeout */
/*
* Sets the frame size for I2S LR clock
*
* @param i2s_reg i2s regiter address
* @param rfs Frame Size
*/
static void i2s_set_lr_framesize(struct i2s_reg *i2s_reg, unsigned int rfs)
{
unsigned int mod = readl(&i2s_reg->mod);
mod &= ~MOD_RCLK_MASK;
switch (rfs) {
case 768:
mod |= MOD_RCLK_768FS;
break;
case 512:
mod |= MOD_RCLK_512FS;
break;
case 384:
mod |= MOD_RCLK_384FS;
break;
default:
mod |= MOD_RCLK_256FS;
break;
}
writel(mod, &i2s_reg->mod);
}
/*
* Sets the i2s transfer control
*
* @param i2s_reg i2s regiter address
* @param on 1 enable tx , 0 disable tx transfer
*/
static void i2s_txctrl(struct i2s_reg *i2s_reg, int on)
{
unsigned int con = readl(&i2s_reg->con);
unsigned int mod = readl(&i2s_reg->mod) & ~MOD_MASK;
if (on) {
con |= CON_ACTIVE;
con &= ~CON_TXCH_PAUSE;
} else {
con |= CON_TXCH_PAUSE;
con &= ~CON_ACTIVE;
}
writel(mod, &i2s_reg->mod);
writel(con, &i2s_reg->con);
}
/*
* set the bit clock frame size (in multiples of LRCLK)
*
* @param i2s_reg i2s regiter address
* @param bfs bit Frame Size
*/
static void i2s_set_bitclk_framesize(struct i2s_reg *i2s_reg, unsigned bfs)
{
unsigned int mod = readl(&i2s_reg->mod);
mod &= ~MOD_BCLK_MASK;
switch (bfs) {
case 48:
mod |= MOD_BCLK_48FS;
break;
case 32:
mod |= MOD_BCLK_32FS;
break;
case 24:
mod |= MOD_BCLK_24FS;
break;
case 16:
mod |= MOD_BCLK_16FS;
break;
default:
return;
}
writel(mod, &i2s_reg->mod);
}
/*
* flushes the i2stx fifo
*
* @param i2s_reg i2s regiter address
* @param flush Tx fifo flush command (0x00 - do not flush
* 0x80 - flush tx fifo)
*/
void i2s_fifo(struct i2s_reg *i2s_reg, unsigned int flush)
{
/* Flush the FIFO */
setbits_le32(&i2s_reg->fic, flush);
clrbits_le32(&i2s_reg->fic, flush);
}
/*
* Set System Clock direction
*
* @param i2s_reg i2s regiter address
* @param dir Clock direction
*
* @return int value 0 for success, -1 in case of error
*/
int i2s_set_sysclk_dir(struct i2s_reg *i2s_reg, int dir)
{
unsigned int mod = readl(&i2s_reg->mod);
if (dir == SND_SOC_CLOCK_IN)
mod |= MOD_CDCLKCON;
else
mod &= ~MOD_CDCLKCON;
writel(mod, &i2s_reg->mod);
return 0;
}
/*
* Sets I2S Clcok format
*
* @param fmt i2s clock properties
* @param i2s_reg i2s regiter address
*
* @return int value 0 for success, -1 in case of error
*/
int i2s_set_fmt(struct i2s_reg *i2s_reg, unsigned int fmt)
{
unsigned int mod = readl(&i2s_reg->mod);
unsigned int tmp = 0;
unsigned int ret = 0;
/* Format is priority */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
tmp |= MOD_LR_RLOW;
tmp |= MOD_SDF_MSB;
break;
case SND_SOC_DAIFMT_LEFT_J:
tmp |= MOD_LR_RLOW;
tmp |= MOD_SDF_LSB;
break;
case SND_SOC_DAIFMT_I2S:
tmp |= MOD_SDF_IIS;
break;
default:
debug("%s: Invalid format priority [0x%x]\n", __func__,
(fmt & SND_SOC_DAIFMT_FORMAT_MASK));
return -1;
}
/*
* INV flag is relative to the FORMAT flag - if set it simply
* flips the polarity specified by the Standard
*/
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
if (tmp & MOD_LR_RLOW)
tmp &= ~MOD_LR_RLOW;
else
tmp |= MOD_LR_RLOW;
break;
default:
debug("%s: Invalid clock ploarity input [0x%x]\n", __func__,
(fmt & SND_SOC_DAIFMT_INV_MASK));
return -1;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
tmp |= MOD_SLAVE;
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* Set default source clock in Master mode */
ret = i2s_set_sysclk_dir(i2s_reg, SND_SOC_CLOCK_OUT);
if (ret != 0) {
debug("%s:set i2s clock direction failed\n", __func__);
return -1;
}
break;
default:
debug("%s: Invalid master selection [0x%x]\n", __func__,
(fmt & SND_SOC_DAIFMT_MASTER_MASK));
return -1;
}
mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
mod |= tmp;
writel(mod, &i2s_reg->mod);
return 0;
}
/*
* Sets the sample width in bits
*
* @param blc samplewidth (size of sample in bits)
* @param i2s_reg i2s regiter address
*
* @return int value 0 for success, -1 in case of error
*/
int i2s_set_samplesize(struct i2s_reg *i2s_reg, unsigned int blc)
{
unsigned int mod = readl(&i2s_reg->mod);
mod &= ~MOD_BLCP_MASK;
mod &= ~MOD_BLC_MASK;
switch (blc) {
case 8:
mod |= MOD_BLCP_8BIT;
mod |= MOD_BLC_8BIT;
break;
case 16:
mod |= MOD_BLCP_16BIT;
mod |= MOD_BLC_16BIT;
break;
case 24:
mod |= MOD_BLCP_24BIT;
mod |= MOD_BLC_24BIT;
break;
default:
debug("%s: Invalid sample size input [0x%x]\n",
__func__, blc);
return -1;
}
writel(mod, &i2s_reg->mod);
return 0;
}
int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned int *data,
unsigned long data_size)
{
int i;
int start;
struct i2s_reg *i2s_reg =
(struct i2s_reg *)pi2s_tx->base_address;
if (data_size < FIFO_LENGTH) {
debug("%s : Invalid data size\n", __func__);
return -1; /* invalid pcm data size */
}
/* fill the tx buffer before stating the tx transmit */
for (i = 0; i < FIFO_LENGTH; i++)
writel(*data++, &i2s_reg->txd);
data_size -= FIFO_LENGTH;
i2s_txctrl(i2s_reg, I2S_TX_ON);
while (data_size > 0) {
start = get_timer(0);
if (!(CON_TXFIFO_FULL & (readl(&i2s_reg->con)))) {
writel(*data++, &i2s_reg->txd);
data_size--;
} else {
if (get_timer(start) > TIMEOUT_I2S_TX) {
i2s_txctrl(i2s_reg, I2S_TX_OFF);
debug("%s: I2S Transfer Timeout\n", __func__);
return -1;
}
}
}
i2s_txctrl(i2s_reg, I2S_TX_OFF);
return 0;
}
int i2s_tx_init(struct i2stx_info *pi2s_tx)
{
int ret;
struct i2s_reg *i2s_reg =
(struct i2s_reg *)pi2s_tx->base_address;
/* Initialize GPIO for I2s */
exynos_pinmux_config(PERIPH_ID_I2S1, 0);
/* Set EPLL Clock */
ret = set_epll_clk(pi2s_tx->audio_pll_clk);
if (ret != 0) {
debug("%s: epll clock set rate falied\n", __func__);
return -1;
}
/* Select Clk Source for Audio1 */
set_i2s_clk_source();
/* Set Prescaler to get MCLK */
set_i2s_clk_prescaler(pi2s_tx->audio_pll_clk,
(pi2s_tx->samplingrate * (pi2s_tx->rfs)));
/* Configure I2s format */
ret = i2s_set_fmt(i2s_reg, (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM));
if (ret == 0) {
i2s_set_lr_framesize(i2s_reg, pi2s_tx->rfs);
ret = i2s_set_samplesize(i2s_reg, pi2s_tx->bitspersample);
if (ret != 0) {
debug("%s:set sample rate failed\n", __func__);
return -1;
}
i2s_set_bitclk_framesize(i2s_reg, pi2s_tx->bfs);
/* disable i2s transfer flag and flush the fifo */
i2s_txctrl(i2s_reg, I2S_TX_OFF);
i2s_fifo(i2s_reg, FIC_TXFLUSH);
} else {
debug("%s: failed\n", __func__);
}
return ret;
}

228
drivers/sound/sound.c
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/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar <rcsekar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <malloc.h>
#include <common.h>
#include <asm/io.h>
#include <i2c.h>
#include <i2s.h>
#include <sound.h>
#include "wm8994.h"
#include <asm/arch/sound.h>
/* defines */
#define SOUND_400_HZ 400
#define SOUND_BITS_IN_BYTE 8
static struct i2stx_info g_i2stx_pri;
static struct sound_codec_info g_codec_info;
/*
* get_sound_fdt_values gets fdt values for i2s parameters
*
* @param i2stx_info i2s transmitter transfer param structure
* @param blob FDT blob
*/
static void get_sound_i2s_values(struct i2stx_info *i2s)
{
i2s->base_address = samsung_get_base_i2s();
i2s->audio_pll_clk = I2S_PLL_CLK;
i2s->samplingrate = I2S_SAMPLING_RATE;
i2s->bitspersample = I2S_BITS_PER_SAMPLE;
i2s->channels = I2S_CHANNELS;
i2s->rfs = I2S_RFS;
i2s->bfs = I2S_BFS;
}
/*
* Gets fdt values for wm8994 config parameters
*
* @param pcodec_info codec information structure
* @param blob FDT blob
* @return int value, 0 for success
*/
static int get_sound_wm8994_values(struct sound_codec_info *pcodec_info)
{
int error = 0;
switch (AUDIO_COMPAT) {
case AUDIO_COMPAT_SPI:
debug("%s: Support not added for SPI interface\n", __func__);
return -1;
break;
case AUDIO_COMPAT_I2C:
pcodec_info->i2c_bus = AUDIO_I2C_BUS;
pcodec_info->i2c_dev_addr = AUDIO_I2C_REG;
debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr);
break;
default:
debug("%s: Unknown compat id %d\n", __func__, AUDIO_COMPAT);
return -1;
}
if (error == -1) {
debug("fail to get wm8994 codec node properties\n");
return -1;
}
return 0;
}
/*
* Gets fdt values for codec config parameters
*
* @param pcodec_info codec information structure
* @param blob FDT blob
* @return int value, 0 for success
*/
static int get_sound_codec_values(struct sound_codec_info *pcodec_info)
{
int error = 0;
const char *codectype;
codectype = AUDIO_CODEC;
if (!strcmp(codectype, "wm8994")) {
pcodec_info->codec_type = CODEC_WM_8994;
error = get_sound_wm8994_values(pcodec_info);
} else {
error = -1;
}
if (error == -1) {
debug("fail to get sound codec node properties\n");
return -1;
}
return 0;
}
int sound_init(void)
{
int ret;
struct i2stx_info *pi2s_tx = &g_i2stx_pri;
struct sound_codec_info *pcodec_info = &g_codec_info;
/* Get the I2S Values */
get_sound_i2s_values(pi2s_tx);
/* Get the codec Values */
if (get_sound_codec_values(pcodec_info) < 0)
return -1;
ret = i2s_tx_init(pi2s_tx);
if (ret) {
debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
ret);
return ret;
}
/* Check the codec type and initialise the same */
if (pcodec_info->codec_type == CODEC_WM_8994) {
ret = wm8994_init(pcodec_info, WM8994_AIF2,
pi2s_tx->samplingrate,
(pi2s_tx->samplingrate * (pi2s_tx->rfs)),
pi2s_tx->bitspersample, pi2s_tx->channels);
} else {
debug("%s: Unknown code type %d\n", __func__,
pcodec_info->codec_type);
return -1;
}
if (ret) {
debug("%s: Codec init failed\n", __func__);
return -1;
}
return ret;
}
/*
* Generates square wave sound data for 1 second
*
* @param data data buffer pointer
* @param size size of the buffer
* @param freq frequency of the wave
*/
static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq)
{
const int sample = 48000;
const unsigned short amplitude = 16000; /* between 1 and 32767 */
const int period = freq ? sample / freq : 0;
const int half = period / 2;
assert(freq);
/* Make sure we don't overflow our buffer */
if (size % 2)
size--;
while (size) {
int i;
for (i = 0; size && i < half; i++) {
size -= 2;
*data++ = amplitude;
*data++ = amplitude;
}
for (i = 0; size && i < period - half; i++) {
size -= 2;
*data++ = -amplitude;
*data++ = -amplitude;
}
}
}
int sound_play(uint32_t msec, uint32_t frequency)
{
unsigned int *data;
unsigned long data_size;
unsigned int ret = 0;
/*Buffer length computation */
data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels;
data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE);
data = malloc(data_size);
if (data == NULL) {
debug("%s: malloc failed\n", __func__);
return -1;
}
sound_prepare_buffer((unsigned short *)data,
data_size / sizeof(unsigned short), frequency);
while (msec >= 1000) {
ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
(data_size / sizeof(int)));
msec -= 1000;
}
if (msec) {
unsigned long size =
(data_size * msec) / (sizeof(int) * 1000);
ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
}
free(data);
return ret;
}

127
include/i2s.h
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/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar <rcsekar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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
*/
#ifndef __I2S_H__
#define __I2S_H__
/*
* DAI hardware audio formats.
*
* Describes the physical PCM data formating and clocking. Add new formats
* to the end.
*/
#define SND_SOC_DAIFMT_I2S 1 /* I2S mode */
#define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */
#define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */
#define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */
#define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */
#define SND_SOC_DAIFMT_AC97 6 /* AC97 */
#define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */
/* left and right justified also known as MSB and LSB respectively */
#define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
#define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
/*
* DAI hardware signal inversions.
*
* Specifies whether the DAI can also support inverted clocks for the specified
* format.
*/
#define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
#define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
#define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */
#define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */
/*
* DAI hardware clock masters.
*
* This is wrt the codec, the inverse is true for the interface
* i.e. if the codec is clk and FRM master then the interface is
* clk and frame slave.
*/
#define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */
#define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */
#define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */
#define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */
#define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
#define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
#define SND_SOC_DAIFMT_INV_MASK 0x0f00
#define SND_SOC_DAIFMT_MASTER_MASK 0xf000
/*
* Master Clock Directions
*/
#define SND_SOC_CLOCK_IN 0
#define SND_SOC_CLOCK_OUT 1
/* I2S Tx Control */
#define I2S_TX_ON 1
#define I2S_TX_OFF 0
#define FIFO_LENGTH 64
/* I2s Registers */
struct i2s_reg {
unsigned int con; /* base + 0 , Control register */
unsigned int mod; /* Mode register */
unsigned int fic; /* FIFO control register */
unsigned int psr; /* Reserved */
unsigned int txd; /* Transmit data register */
unsigned int rxd; /* Receive Data Register */
};
/* This structure stores the i2s related information */
struct i2stx_info {
unsigned int rfs; /* LR clock frame size */
unsigned int bfs; /* Bit slock frame size */
unsigned int audio_pll_clk; /* Audio pll frequency in Hz */
unsigned int samplingrate; /* sampling rate */
unsigned int bitspersample; /* bits per sample */
unsigned int channels; /* audio channels */
unsigned int base_address; /* I2S Register Base */
};
/*
* Sends the given data through i2s tx
*
* @param pi2s_tx pointer of i2s transmitter parameter structure.
* @param data address of the data buffer
* @param data_size array size of the int buffer (total size / size of int)
*
* @return int value 0 for success, -1 in case of error
*/
int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned *data,
unsigned long data_size);
/*
* Initialise i2s transmiter
*
* @param pi2s_tx pointer of i2s transmitter parameter structure.
*
* @return int value 0 for success, -1 in case of error
*/
int i2s_tx_init(struct i2stx_info *pi2s_tx);
#endif /* __I2S_H__ */

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include/sound.h
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/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar < rcsekar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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
*/
#ifndef __SOUND_H__
#define __SOUND_H__
/* sound codec enum */
enum en_sound_codec {
CODEC_WM_8994,
CODEC_WM_8995,
CODEC_MAX
};
/* sound codec enum */
enum sound_compat {
AUDIO_COMPAT_SPI,
AUDIO_COMPAT_I2C,
};
/* Codec information structure to store the info from device tree */
struct sound_codec_info {
int i2c_bus;
int i2c_dev_addr;
enum en_sound_codec codec_type;
};
/*
* Initialises audio sub system
*
* @return int value 0 for success, -1 for error
*/
int sound_init(void);
/*
* plays the pcm data buffer in pcm_data.h through i2s1 to make the
* sine wave sound
*
* @return int 0 for success, -1 for error
*/
int sound_play(uint32_t msec, uint32_t frequency);
#endif /* __SOUND__H__ */
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