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/*
*
* arch/arm/mach-u300/padmux.c
*
*
* Copyright (C) 2009 ST-Ericsson AB
* License terms: GNU General Public License (GPL) version 2
* U300 PADMUX functions
* Author: Linus Walleij <linus.walleij@stericsson.com>
*
*/
#include <linux/io.h>
#include <linux/err.h>
#include <mach/u300-regs.h>
#include <mach/syscon.h>
#include "padmux.h"
/* Set the PAD MUX to route the MMC reader correctly to GPIO0. */
void pmx_set_mission_mode_mmc(void)
{
u16 val;
val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1LR);
val &= ~U300_SYSCON_PMC1LR_MMCSD_MASK;
writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1LR);
val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
val &= ~U300_SYSCON_PMC1HR_APP_GPIO_1_MASK;
val |= U300_SYSCON_PMC1HR_APP_GPIO_1_MMC;
writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
}
void pmx_set_mission_mode_spi(void)
{
u16 val;
/* Set up padmuxing so the SPI port and its chipselects are active */
val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
/*
* Activate the SPI port (disable the use of these pins for generic
* GPIO, DSP, AAIF
*/
val &= ~U300_SYSCON_PMC1HR_APP_SPI_2_MASK;
val |= U300_SYSCON_PMC1HR_APP_SPI_2_SPI;
/*
* Use GPIO pin SPI CS1 for CS1 actually (it can be used for other
* things also)
*/
val &= ~U300_SYSCON_PMC1HR_APP_SPI_CS_1_MASK;
val |= U300_SYSCON_PMC1HR_APP_SPI_CS_1_SPI;
/*
* Use GPIO pin SPI CS2 for CS2 actually (it can be used for other
* things also)
*/
val &= ~U300_SYSCON_PMC1HR_APP_SPI_CS_2_MASK;
val |= U300_SYSCON_PMC1HR_APP_SPI_CS_2_SPI;
writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
}
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