[U-Boot] [PATCH 3/4] ARM: Change from I2S1 to I2S0 for audio on SMDK5250

[Dani Krishna Mohan]

This patch makes the necessary changes for making use of
I2S0 channel instead of I2S1 channel on smdk board. This
changes are done to maintain the uniformity to use I2S0 channel.

Signed-off-by: Dani Krishna Mohan <krishna.md at samsung.com>
---
 arch/arm/cpu/armv7/exynos/clock.c         |   13 +++++++++----
 arch/arm/cpu/armv7/exynos/pinmux.c        |   15 +++++++++++++--
 arch/arm/include/asm/arch-exynos/clock.h  |    8 +++++---
 arch/arm/include/asm/arch-exynos/cpu.h    |    2 ++
 arch/arm/include/asm/arch-exynos/periph.h |    1 +
 5 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index 0cb1a61..2a1b681 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -282,6 +282,9 @@ static unsigned long exynos5_get_periph_rate(int peripheral)
 		src = readl(&clk->src_peric0);
 		div = readl(&clk->div_peric3);
 		break;
+	case PERIPH_ID_I2S0:
+		src = readl(&clk->src_mau);
+		div = readl(&clk->div_mau);
 	case PERIPH_ID_SPI0:
 	case PERIPH_ID_SPI1:
 		src = readl(&clk->src_peric1);
@@ -1151,8 +1154,10 @@ void exynos5_set_i2s_clk_source(void)
 	struct exynos5_clock *clk =
 		(struct exynos5_clock *)samsung_get_base_clock();
 
-	clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
+	setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
+	clrsetbits_le32(&clk->src_mau, AUDIO_SEL_MASK,
 			(CLK_SRC_SCLK_EPLL));
+	setbits_le32(EXYNOS_AUDSS, CLKMUX_ASS);
 }
 
 int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
@@ -1169,13 +1174,13 @@ int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
 	}
 
 	div = (src_frq / dst_frq);
-	if (div > AUDIO_1_RATIO_MASK) {
+	if (div > AUDIO_RATIO_MASK) {
 		debug("%s: Frequency ratio is out of range\n", __func__);
 		debug("src frq = %d des frq = %d ", src_frq, dst_frq);
 		return -1;
 	}
-	clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
-				(div & AUDIO_1_RATIO_MASK));
+	clrsetbits_le32(&clk->div_mau, AUDIO_RATIO_MASK,
+			(div & AUDIO_RATIO_MASK));
 	return 0;
 }
 
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index 1b05ebf..59f445a 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -221,9 +221,19 @@ static void exynos5_i2s_config(int peripheral)
 	int i;
 	struct exynos5_gpio_part1 *gpio1 =
 		(struct exynos5_gpio_part1 *) samsung_get_base_gpio_part1();
+	struct exynos5_gpio_part4 *gpio4 =
+		(struct exynos5_gpio_part4 *)samsung_get_base_gpio_part4();
 
-	for (i = 0; i < 5; i++)
-		s5p_gpio_cfg_pin(&gpio1->b0, i, GPIO_FUNC(0x02));
+	switch (peripheral) {
+	case PERIPH_ID_I2S0:
+		for (i = 0; i < 5; i++)
+			s5p_gpio_cfg_pin(&gpio4->z, i, GPIO_FUNC(0x02));
+		break;
+	case PERIPH_ID_I2S1:
+		for (i = 0; i < 5; i++)
+			s5p_gpio_cfg_pin(&gpio1->b0, i, GPIO_FUNC(0x02));
+		break;
+	}
 }
 
 void exynos5_spi_config(int peripheral)
@@ -296,6 +306,7 @@ static int exynos5_pinmux_config(int peripheral, int flags)
 	case PERIPH_ID_I2C7:
 		exynos5_i2c_config(peripheral, flags);
 		break;
+	case PERIPH_ID_I2S0:
 	case PERIPH_ID_I2S1:
 		exynos5_i2s_config(peripheral);
 		break;
diff --git a/arch/arm/include/asm/arch-exynos/clock.h b/arch/arm/include/asm/arch-exynos/clock.h
index 2b97b9a..d55424e 100644
--- a/arch/arm/include/asm/arch-exynos/clock.h
+++ b/arch/arm/include/asm/arch-exynos/clock.h
@@ -873,11 +873,13 @@ struct set_epll_con_val {
 #define EXYNOS5_EPLLCON0_LOCKED_SHIFT	29  /* EPLL Locked bit position*/
 #define TIMEOUT_EPLL_LOCK		1000
 
-#define AUDIO_0_RATIO_MASK		0x0f
-#define AUDIO_1_RATIO_MASK		0x0f
+#define AUDIO_RATIO_MASK		0x0f
+
+#define AUDIO_SEL_MASK			0xf
 
-#define AUDIO1_SEL_MASK			0xf
 #define CLK_SRC_SCLK_EPLL		0x7
+#define CLK_SRC_MOUT_EPLL		(1<<12)
+#define CLKMUX_ASS			(1<<0)
 
 /* CON0 bit-fields */
 #define EPLL_CON0_MDIV_MASK		0x1ff
diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h
index cb924fb..552b64f 100644
--- a/arch/arm/include/asm/arch-exynos/cpu.h
+++ b/arch/arm/include/asm/arch-exynos/cpu.h
@@ -89,6 +89,8 @@
 /* EXYNOS5 Common*/
 #define EXYNOS5_I2C_SPACING		0x10000
 
+#define EXYNOS_AUDSS			0x03810000
+
 #define EXYNOS5_GPIO_PART4_BASE		0x03860000
 #define EXYNOS5_PRO_ID			0x10000000
 #define EXYNOS5_CLOCK_BASE		0x10010000
diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h
index 9952155..64bd8b7 100644
--- a/arch/arm/include/asm/arch-exynos/periph.h
+++ b/arch/arm/include/asm/arch-exynos/periph.h
@@ -34,6 +34,7 @@ enum periph_id {
 	PERIPH_ID_SDMMC1,
 	PERIPH_ID_SDMMC2,
 	PERIPH_ID_SDMMC3,
+	PERIPH_ID_I2S0 = 98,
 	PERIPH_ID_I2S1 = 99,
 
 	/* Since following peripherals do
-- 
1.7.9.5