[U-Boot] [PATCH v2 4/7] tegra: Add SDMMC support to funcmux

[Simon Glass]

This adds support for SDMMC ports to the funcmux. Only one
option is supported: FUNCMUXO_SDMMC_8BIT which selects an 8-bit
wide SDIO interface where available.

Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2:
- Fix SDMMC4 config 0 to remove unwanted ATB pin group
- Remove funcmux_select() option parameter
- Use config enum to select funcmux

 arch/arm/cpu/armv7/tegra2/funcmux.c        |   63 ++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-tegra2/funcmux.h |    8 ++++
 2 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c
index 6df9378..73950d0 100644
--- a/arch/arm/cpu/armv7/tegra2/funcmux.c
+++ b/arch/arm/cpu/armv7/tegra2/funcmux.c
@@ -93,6 +93,69 @@ int funcmux_select(enum periph_id id, int config)
 		}
 		break;
 
+	case PERIPH_ID_SDMMC2:
+		if (config == FUNCMUX_SDMMC2_DTA_DTD_8BIT) {
+			pinmux_set_func(PINGRP_DTA, PMUX_FUNC_SDIO2);
+			pinmux_set_func(PINGRP_DTD, PMUX_FUNC_SDIO2);
+
+			pinmux_tristate_disable(PINGRP_DTA);
+			pinmux_tristate_disable(PINGRP_DTD);
+		}
+		break;
+
+	case PERIPH_ID_SDMMC3:
+		switch (config) {
+		case FUNCMUX_SDMMC3_SDB_SLXA_8BIT:
+			pinmux_set_func(PINGRP_SLXA, PMUX_FUNC_SDIO3);
+			pinmux_set_func(PINGRP_SLXC, PMUX_FUNC_SDIO3);
+			pinmux_set_func(PINGRP_SLXD, PMUX_FUNC_SDIO3);
+			pinmux_set_func(PINGRP_SLXK, PMUX_FUNC_SDIO3);
+
+			pinmux_tristate_disable(PINGRP_SLXA);
+			pinmux_tristate_disable(PINGRP_SLXC);
+			pinmux_tristate_disable(PINGRP_SLXD);
+			pinmux_tristate_disable(PINGRP_SLXK);
+			/* fall through */
+
+		case FUNCMUX_SDMMC3_SDB_4BIT:
+			pinmux_set_func(PINGRP_SDB, PMUX_FUNC_SDIO3);
+			pinmux_set_func(PINGRP_SDC, PMUX_FUNC_SDIO3);
+			pinmux_set_func(PINGRP_SDD, PMUX_FUNC_SDIO3);
+
+			pinmux_tristate_disable(PINGRP_SDB);
+			pinmux_tristate_disable(PINGRP_SDC);
+			pinmux_tristate_disable(PINGRP_SDD);
+			bad_config = 0;
+			break;
+		}
+		break;
+
+	case PERIPH_ID_SDMMC4:
+		switch (config) {
+		case FUNCMUX_SDMMC4_ATC_ATD_8BIT:
+			pinmux_set_func(PINGRP_ATC, PMUX_FUNC_SDIO4);
+			pinmux_set_func(PINGRP_ATD, PMUX_FUNC_SDIO4);
+
+			pinmux_tristate_disable(PINGRP_ATC);
+			pinmux_tristate_disable(PINGRP_ATD);
+			break;
+
+		case FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT:
+			pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
+			pinmux_tristate_disable(PINGRP_GME);
+			/* fall through */
+
+		case FUNCMUX_SDMMC4_ATB_GMA_4_BIT:
+			pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
+			pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
+
+			pinmux_tristate_disable(PINGRP_ATB);
+			pinmux_tristate_disable(PINGRP_GMA);
+			bad_config = 0;
+			break;
+		}
+		break;
+
 	default:
 		debug("%s: invalid periph_id %d", __func__, id);
 		return -1;
diff --git a/arch/arm/include/asm/arch-tegra2/funcmux.h b/arch/arm/include/asm/arch-tegra2/funcmux.h
index d184523..ae73c72 100644
--- a/arch/arm/include/asm/arch-tegra2/funcmux.h
+++ b/arch/arm/include/asm/arch-tegra2/funcmux.h
@@ -39,6 +39,14 @@ enum {
 	FUNCMUX_I2C2_DDC = 0,
 	FUNCMUX_I2C2_PTA,
 	FUNCMUX_I2C3_DTF = 0,
+
+	/* SDMMC configs */
+	FUNCMUX_SDMMC2_DTA_DTD_8BIT = 0,
+	FUNCMUX_SDMMC3_SDB_4BIT = 0,
+	FUNCMUX_SDMMC3_SDB_SLXA_8BIT,
+	FUNCMUX_SDMMC4_ATC_ATD_8BIT = 0,
+	FUNCMUX_SDMMC4_ATB_GMA_4_BIT,
+	FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT,
 };
 
 /**
-- 
1.7.3.1