[U-Boot] [PATCH 1/9 V3] SOUND: SAMSUNG: Add I2S driver
Rajeshwari Shinde
rajeshwari.s at samsung.com
Tue Oct 23 08:57:21 CEST 2012
This patch adds driver for I2S interface specific to samsung.
Signed-off-by: R. Chandrasekar <rcsekar at samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V2:
- renamed i2s.c to samsung-i2s.c.
Changes in V3:
- wave sine table removed and the same in calculated in a function.
Makefile | 1 +
drivers/sound/Makefile | 47 ++++++
drivers/sound/samsung-i2s.c | 358 +++++++++++++++++++++++++++++++++++++++++++
drivers/sound/sound.c | 228 +++++++++++++++++++++++++++
include/i2s.h | 127 +++++++++++++++
include/sound.h | 62 ++++++++
6 files changed, 823 insertions(+), 0 deletions(-)
create mode 100644 drivers/sound/Makefile
create mode 100644 drivers/sound/samsung-i2s.c
create mode 100644 drivers/sound/sound.c
create mode 100644 include/i2s.h
create mode 100644 include/sound.h
diff --git a/Makefile b/Makefile
index a40d4cc..f7d7f47 100644
--- a/Makefile
+++ b/Makefile
@@ -293,6 +293,7 @@ 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
diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile
new file mode 100644
index 0000000..18ad2c9
--- /dev/null
+++ b/drivers/sound/Makefile
@@ -0,0 +1,47 @@
+#
+# Copyright (C) 2012 Samsung Electronics
+# R. Chandrasekar <rcsekar at 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
+
+#
diff --git a/drivers/sound/samsung-i2s.c b/drivers/sound/samsung-i2s.c
new file mode 100644
index 0000000..3ce0b59
--- /dev/null
+++ b/drivers/sound/samsung-i2s.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar <rcsekar at 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;
+}
diff --git a/drivers/sound/sound.c b/drivers/sound/sound.c
new file mode 100644
index 0000000..ff76996
--- /dev/null
+++ b/drivers/sound/sound.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar <rcsekar at 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
+
+/* Globals */
+struct i2stx_info g_i2stx_pri;
+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;
+
+ /* Sine wave 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;
+}
diff --git a/include/i2s.h b/include/i2s.h
new file mode 100644
index 0000000..f1b642e
--- /dev/null
+++ b/include/i2s.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar <rcsekar at 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__ */
diff --git a/include/sound.h b/include/sound.h
new file mode 100644
index 0000000..ea0b115
--- /dev/null
+++ b/include/sound.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar < rcsekar at 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__ */
--
1.7.4.4
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