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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>
This commit is contained in:
Simon Glass 2012-01-11 12:42:25 +00:00 committed by Albert ARIBAUD
parent 8a1133c607
commit cf06b13903
2 changed files with 71 additions and 0 deletions
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63
arch/arm/cpu/armv7/tegra2/funcmux.c
View File

@ -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;

8
arch/arm/include/asm/arch-tegra2/funcmux.h
View File

@ -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,
};
/**