LXR linux/drivers/mfd/tmio

   1/*
   2 * Copyright(c) 2009 Ian Molton <spyro@f2s.com>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#include <linux/export.h>
  10#include <linux/mfd/tmio.h>
  11
  12int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base)
  13{
  14        /* Enable the MMC/SD Control registers */
  15        sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  16        sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  17
  18        /* Disable SD power during suspend */
  19        sd_config_write8(cnf, shift, CNF_PWR_CTL_3, 0x01);
  20
  21        /* The below is required but why? FIXME */
  22        sd_config_write8(cnf, shift, CNF_STOP_CLK_CTL, 0x1f);
  23
  24        /* Power down SD bus */
  25        sd_config_write8(cnf, shift, CNF_PWR_CTL_2, 0x00);
  26
  27        return 0;
  28}
  29EXPORT_SYMBOL(tmio_core_mmc_enable);
  30
  31int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base)
  32{
  33
  34        /* Enable the MMC/SD Control registers */
  35        sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  36        sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  37
  38        return 0;
  39}
  40EXPORT_SYMBOL(tmio_core_mmc_resume);
  41
  42void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state)
  43{
  44        sd_config_write8(cnf, shift, CNF_PWR_CTL_2, state ? 0x02 : 0x00);
  45}
  46EXPORT_SYMBOL(tmio_core_mmc_pwr);
  47
  48void tmio_core_mmc_clk_div(void __iomem *cnf, int shift, int state)
  49{
  50        sd_config_write8(cnf, shift, CNF_SD_CLK_MODE, state ? 1 : 0);
  51}
  52EXPORT_SYMBOL(tmio_core_mmc_clk_div);
  53
  54