kernel-ark/drivers/mfd/tmio_core.c
Ian Molton 64e8867ba8 mfd: tmio_mmc hardware abstraction for CNF area
This patch abstracts out the CNF area code from tmio_mmc which
is not present in all hardware that can use this driver. This
is required so that we can support non-toshiba based hardware.

ASIC3 support by Philipp Zabel

Signed-off-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-01-18 12:30:27 +01:00

53 lines
1.4 KiB
C

/*
* Copyright(c) 2009 Ian Molton <spyro@f2s.com>
*
* 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/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);