From cf06b139031670a8d06c88d5f3a31c284472f00e Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Wed, 11 Jan 2012 12:42:25 +0000
Subject: [PATCH] tegra: Add SDMMC support to funcmux
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@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
---
arch/arm/cpu/armv7/tegra2/funcmux.c | 63 ++++++++++++++++++++++
arch/arm/include/asm/arch-tegra2/funcmux.h | 8 +++
2 files changed, 71 insertions(+)
diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c
index 4fe6e06531..c1d2dfec5f 100644
--- a/arch/arm/cpu/armv7/tegra2/funcmux.c
+++ b/arch/arm/cpu/armv7/tegra2/funcmux.c
@@ -106,6 +106,69 @@ 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 d184523800..ae73c72ebe 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,
};
/**
--
2.39.5