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>

diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c
index 4fe6e06..c1d2dfe 100644 (file)
--- 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 d184523..ae73c72 100644 (file)
--- 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,
 };
 
 /**