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 <s...@chromium.org>
---
arch/arm/cpu/armv7/tegra2/funcmux.c | 70 ++++++++++++++++++++++++++++
arch/arm/include/asm/arch-tegra2/funcmux.h | 5 ++
2 files changed, 75 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c
b/arch/arm/cpu/armv7/tegra2/funcmux.c
index ea40f1a..accae5c 100644
--- a/arch/arm/cpu/armv7/tegra2/funcmux.c
+++ b/arch/arm/cpu/armv7/tegra2/funcmux.c
@@ -94,6 +94,76 @@ int funcmux_select(enum periph_id id, int config, int
options)
}
break;
+ case PERIPH_ID_SDMMC2:
+ if (config == 0) {
+ if (options & FUNCMUXO_SDMMC_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);
+ options &= ~FUNCMUXO_SDMMC_8BIT;
+ } else {
+ required_options = FUNCMUXO_SDMMC_8BIT;
+ }
+ }
+ break;
+
+ case PERIPH_ID_SDMMC3:
+ if (config == 0) {
+ 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_SDC);
+ pinmux_tristate_disable(PINGRP_SDD);
+ pinmux_tristate_disable(PINGRP_SDB);
+
+ if (options & FUNCMUXO_SDMMC_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);
+ options &= ~FUNCMUXO_SDMMC_8BIT;
+ }
+ }
+ break;
+
+ case PERIPH_ID_SDMMC4:
+ switch (config) {
+ case 0:
+ if (options & FUNCMUXO_SDMMC_8BIT) {
+ pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
+ pinmux_set_func(PINGRP_ATC, PMUX_FUNC_SDIO4);
+ pinmux_set_func(PINGRP_ATD, PMUX_FUNC_SDIO4);
+
+ pinmux_tristate_disable(PINGRP_ATB);
+ pinmux_tristate_disable(PINGRP_ATC);
+ pinmux_tristate_disable(PINGRP_ATD);
+ options &= ~FUNCMUXO_SDMMC_8BIT;
+ } else {
+ required_options = FUNCMUXO_SDMMC_8BIT;
+ }
+ break;
+
+ case 1:
+ pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
+ pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
+ pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
+
+ pinmux_tristate_disable(PINGRP_ATB);
+ pinmux_tristate_disable(PINGRP_GMA);
+ pinmux_tristate_disable(PINGRP_GME);
+ 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 a3b315b..2c48433 100644
--- a/arch/arm/include/asm/arch-tegra2/funcmux.h
+++ b/arch/arm/include/asm/arch-tegra2/funcmux.h
@@ -24,6 +24,11 @@
#ifndef __FUNCMUX_H
#define __FUNCMUX_H
+/* Options supported by the func mux */
+enum {
+ FUNCMUXO_SDMMC_8BIT = 1 << 0, /* 8-pin SDMMC interface */
+};
+
/**
* Select a config for a particular peripheral.
*
--
1.7.3.1
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