drivers/mfd/tmio_core.c

   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/mfd/tmio.h>
  10
  11 int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base)
  12 {
  13         /* Enable the MMC/SD Control registers */
  14         sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  15         sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  16
  17         /* Disable SD power during suspend */
  18         sd_config_write8(cnf, shift, CNF_PWR_CTL_3, 0x01);
  19
  20         /* The below is required but why? FIXME */
  21         sd_config_write8(cnf, shift, CNF_STOP_CLK_CTL, 0x1f);
  22
  23         /* Power down SD bus */
  24         sd_config_write8(cnf, shift, CNF_PWR_CTL_2, 0x00);
  25
  26         return 0;
  27 }
  28 EXPORT_SYMBOL(tmio_core_mmc_enable);
  29
  30 int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base)
  31 {
  32
  33         /* Enable the MMC/SD Control registers */
  34         sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  35         sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  36
  37         return 0;
  38 }
  39 EXPORT_SYMBOL(tmio_core_mmc_resume);
  40
  41 void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state)
  42 {
  43         sd_config_write8(cnf, shift, CNF_PWR_CTL_2, state ? 0x02 : 0x00);
  44 }
  45 EXPORT_SYMBOL(tmio_core_mmc_pwr);
  46
  47 void tmio_core_mmc_clk_div(void __iomem *cnf, int shift, int state)
  48 {
  49         sd_config_write8(cnf, shift, CNF_SD_CLK_MODE, state ? 1 : 0);
  50 }
  51 EXPORT_SYMBOL(tmio_core_mmc_clk_div);
  52