This patch adds the driver for codec MAX98095 required by Snow
Board
Signed-off-by: Rajeshwari Shinde rajeshwar...@samsung.com
---
Changes in V2:
- None
drivers/sound/Makefile |1 +
drivers/sound/max98095.c | 550 ++
drivers/sound/max98095.h | 311 ++
3 files changed, 862 insertions(+), 0 deletions(-)
create mode 100644 drivers/sound/max98095.c
create mode 100644 drivers/sound/max98095.h
diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile
index 8fdffb1..1987ca1 100644
--- a/drivers/sound/Makefile
+++ b/drivers/sound/Makefile
@@ -28,6 +28,7 @@ LIB := $(obj)libsound.o
COBJS-$(CONFIG_SOUND) += sound.o
COBJS-$(CONFIG_I2S)+= samsung-i2s.o
COBJS-$(CONFIG_SOUND_WM8994) += wm8994.o
+COBJS-$(CONFIG_SOUND_MAX98095) += max98095.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/sound/max98095.c b/drivers/sound/max98095.c
new file mode 100644
index 000..0beee56
--- /dev/null
+++ b/drivers/sound/max98095.c
@@ -0,0 +1,550 @@
+/*
+ * max98095.c -- MAX98095 ALSA SoC Audio driver
+ *
+ * Copyright 2011 Maxim Integrated Products
+ *
+ * Modified for uboot by R. Chandrasekar (rcse...@samsung.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include asm/arch/clk.h
+#include asm/arch/cpu.h
+#include asm/arch/power.h
+#include asm/gpio.h
+#include asm/io.h
+#include common.h
+#include div64.h
+#include fdtdec.h
+#include i2c.h
+#include sound.h
+#include i2s.h
+#include max98095.h
+
+enum max98095_type {
+ MAX98095,
+};
+
+struct max98095_priv {
+ enum max98095_type devtype;
+ unsigned int sysclk;
+ unsigned int rate;
+ unsigned int fmt;
+};
+
+static struct sound_codec_info g_codec_info;
+struct max98095_priv g_max98095_info;
+unsigned int g_max98095_i2c_dev_addr;
+
+/* Index 0 is reserved. */
+int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
+ 88200, 96000};
+
+/*
+ * Writes value to a device register through i2c
+ *
+ * @param reg reg number to be write
+ * @param data data to be writen to the above registor
+ *
+ * @return int value 1 for change, 0 for no change or negative error code.
+ */
+static int max98095_i2c_write(unsigned int reg, unsigned char data)
+{
+ debug(%s: Write Addr : 0x%02X, Data : 0x%02X\n,
+ __func__, reg, data);
+ return i2c_write(g_max98095_i2c_dev_addr, reg, 1, data, 1);
+}
+
+/*
+ * Read a value from a device register through i2c
+ *
+ * @param reg reg number to be read
+ * @param data address of read data to be stored
+ *
+ * @return int value 0 for success, -1 in case of error.
+ */
+static unsigned int max98095_i2c_read(unsigned int reg, unsigned char *data)
+{
+ int ret;
+
+ ret = i2c_read(g_max98095_i2c_dev_addr, reg, 1, data, 1);
+ if (ret != 0) {
+ debug(%s: Error while reading register %#04x\n,
+ __func__, reg);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * update device register bits through i2c
+ *
+ * @param reg codec register
+ * @param mask register mask
+ * @param valuenew value
+ *
+ * @return int value 0 for success, non-zero error code.
+ */
+static int max98095_update_bits(unsigned int reg, unsigned char mask,
+ unsigned char value)
+{
+ int change, ret = 0;
+ unsigned char old, new;
+
+ if (max98095_i2c_read(reg, old) != 0)
+ return -1;
+ new = (old ~mask) | (value mask);
+ change = (old != new) ? 1 : 0;
+ if (change)
+ ret = max98095_i2c_write(reg, new);
+ if (ret 0)
+ return ret;
+
+ return change;
+}
+
+/*
+ * codec mclk clock divider coefficients based on sampling rate
+ *
+ * @param rate sampling rate
+ * @param value address of indexvalue to be stored
+ *
+ * @return 0 for success or negative error code.
+ */
+static int rate_value(int rate, u8 *value)
+{
+ int i;
+
+ for (i = 1; i ARRAY_SIZE(rate_table); i++) {
+ if (rate_table[i] = rate) {
+ *value = i;
+ return 0;
+ }
+ }
+ *value = 1;
+
+ return -1;
+}
+
+/*
+ * Sets hw params for max98095
+ *
+ * @param max98095 max98095 information pointer
+ * @param rate Sampling rate
+ * @param bits_per_sample Bits per sample
+ *
+ * @return -1 for error and 0 Success.
+ */
+static int max98095_hw_params(struct max98095_priv *max98095,
+ unsigned int rate, unsigned int bits_per_sample)
+{
+ u8 regval;
+ int error;
+
+ switch (bits_per_sample) {
+ case 16:
+ error = max98095_update_bits(M98095_034_DAI2_FORMAT,
+ M98095_DAI_WS, 0);
+
