tmio_core.c

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/*
 * Copyright(c) 2009 Ian Molton <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/export.h>
#include <linux/mfd/tmio.h>

int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base)
{
    /* Enable the MMC/SD Control registers */
    sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
    sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);

    /* Disable SD power during suspend */
    sd_config_write8(cnf, shift, CNF_PWR_CTL_3, 0x01);

    /* The below is required but why? FIXME */
    sd_config_write8(cnf, shift, CNF_STOP_CLK_CTL, 0x1f);

    /* Power down SD bus */
    sd_config_write8(cnf, shift, CNF_PWR_CTL_2, 0x00);

    return 0;
}
EXPORT_SYMBOL(tmio_core_mmc_enable);

int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base)
{

    /* Enable the MMC/SD Control registers */
    sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
    sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);

    return 0;
}
EXPORT_SYMBOL(tmio_core_mmc_resume);

void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state)
{
    sd_config_write8(cnf, shift, CNF_PWR_CTL_2, state ? 0x02 : 0x00);
}
EXPORT_SYMBOL(tmio_core_mmc_pwr);

void tmio_core_mmc_clk_div(void __iomem *cnf, int shift, int state)
{
    sd_config_write8(cnf, shift, CNF_SD_CLK_MODE, state ? 1 : 0);
}
EXPORT_SYMBOL(tmio_core_mmc_clk_div);