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/export.h>
  10 #include <linux/mfd/tmio.h>
  11
  12 int 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 }
  29 EXPORT_SYMBOL(tmio_core_mmc_enable);
  30
  31 int 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 }
  40 EXPORT_SYMBOL(tmio_core_mmc_resume);
  41
  42 void 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 }
  46 EXPORT_SYMBOL(tmio_core_mmc_pwr);
  47
  48 void 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 }
  52 EXPORT_SYMBOL(tmio_core_mmc_clk_div);
  53