This patch makes required changes to make use
of I2S0 channel instead of I2S1 channel on exynos5250.
Signed-off-by: Dani Krishna Mohan <krishna...@samsung.com>
---
arch/arm/include/asm/arch-exynos/i2s-regs.h | 6 ++++
drivers/sound/samsung-i2s.c | 42 +++++++++++++++++++--------
2 files changed, 36 insertions(+), 12 deletions(-)
diff --git a/arch/arm/include/asm/arch-exynos/i2s-regs.h
b/arch/arm/include/asm/arch-exynos/i2s-regs.h
index 613b9b7..4a4a7a0 100644
--- a/arch/arm/include/asm/arch-exynos/i2s-regs.h
+++ b/arch/arm/include/asm/arch-exynos/i2s-regs.h
@@ -8,10 +8,12 @@
#ifndef __I2S_REGS_H__
#define __I2S_REGS_H__
+#define CON_RESET (1 << 31)
#define CON_TXFIFO_FULL (1 << 8)
#define CON_TXCH_PAUSE (1 << 4)
#define CON_ACTIVE (1 << 0)
+#define MOD_OP_CLK (3 << 30)
#define MOD_BLCP_SHIFT 24
#define MOD_BLCP_16BIT (0 << MOD_BLCP_SHIFT)
#define MOD_BLCP_8BIT (1 << MOD_BLCP_SHIFT)
@@ -24,6 +26,7 @@
#define MOD_BLC_MASK (3 << 13)
#define MOD_SLAVE (1 << 11)
+#define MOD_RCLKSRC (0 << 10)
#define MOD_MASK (3 << 8)
#define MOD_LR_LLOW (0 << 7)
#define MOD_LR_RLOW (1 << 7)
@@ -47,4 +50,7 @@
#define FIC_TXFLUSH (1 << 15)
#define FIC_RXFLUSH (1 << 7)
+#define PSREN (1 << 15)
+#define PSVAL (3 << 8)
+
#endif /* __I2S_REGS_H__ */
diff --git a/drivers/sound/samsung-i2s.c b/drivers/sound/samsung-i2s.c
index 9caa4d2..66db9a8 100644
--- a/drivers/sound/samsung-i2s.c
+++ b/drivers/sound/samsung-i2s.c
@@ -65,7 +65,6 @@ static void i2s_txctrl(struct i2s_reg *i2s_reg, int on)
if (on) {
con |= CON_ACTIVE;
con &= ~CON_TXCH_PAUSE;
-
} else {
con |= CON_TXCH_PAUSE;
con &= ~CON_ACTIVE;
@@ -300,28 +299,47 @@ int i2s_tx_init(struct i2stx_info *pi2s_tx)
int ret;
struct i2s_reg *i2s_reg =
(struct i2s_reg *)pi2s_tx->base_address;
+ if (pi2s_tx->id == 0) {
+ /* Initialize GPIO for I2S-0 */
+ exynos_pinmux_config(PERIPH_ID_I2S0, 0);
+
+ /* Set EPLL Clock */
+ ret = set_epll_clk(pi2s_tx->samplingrate * pi2s_tx->rfs * 4);
+ } else if (pi2s_tx->id == 1) {
+ /* Initialize GPIO for I2S-1 */
+ exynos_pinmux_config(PERIPH_ID_I2S1, 0);
+
+ /* Set EPLL Clock */
+ ret = set_epll_clk(pi2s_tx->audio_pll_clk);
+ } else {
+ debug("%s: unsupported i2s-%d bus\n", __func__, pi2s_tx->id);
+ return -1;
+ }
- /* 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 */
+ /* Select Clk Source for Audio 0 or 1 */
set_i2s_clk_source(pi2s_tx->id);
- /* Set Prescaler to get MCLK */
- set_i2s_clk_prescaler(pi2s_tx->audio_pll_clk,
- (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
- pi2s_tx->id);
+ if (pi2s_tx->id == 0) {
+ /*Reset the i2s module */
+ writel(CON_RESET, &i2s_reg->con);
+ writel(MOD_OP_CLK | MOD_RCLKSRC, &i2s_reg->mod);
+ /* set i2s prescaler */
+ writel(PSREN | PSVAL, &i2s_reg->psr);
+ } else {
+ /* Set Prescaler to get MCLK */
+ set_i2s_clk_prescaler(pi2s_tx->audio_pll_clk,
+ (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
+ pi2s_tx->id);
+ }
/* Configure I2s format */
ret = i2s_set_fmt(i2s_reg, (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBM_CFM));
+ 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);
--
1.7.9.5
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