drivers/mfd/tmio_core.c

   1 /*
   2  * Toshiba TC6393XB SoC support
   3  *
   4  * Copyright(c) 2009 Ian Molton <spyro@f2s.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/mfd/tmio.h>
  12
  13 static int shift;
  14
  15 int tmio_core_mmc_enable(void __iomem *cnf, unsigned long base)
  16 {
  17         /* Enable the MMC/SD Control registers */
  18         sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  19         sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  20
  21         /* Disable SD power during suspend */
  22         sd_config_write8(cnf, shift, CNF_PWR_CTL_3, 0x01);
  23
  24         /* The below is required but why? FIXME */
  25         sd_config_write8(cnf, shift, CNF_STOP_CLK_CTL, 0x1f);
  26
  27         /* Power down SD bus*/
  28         sd_config_write8(cnf, shift, CNF_PWR_CTL_2, 0x00);
  29
  30         return 0;
  31 }
  32 EXPORT_SYMBOL(tmio_core_mmc_enable);
  33
  34 int tmio_core_mmc_resume(void __iomem *cnf, unsigned long base)
  35 {
  36
  37         /* Enable the MMC/SD Control registers */
  38         sd_config_write16(cnf, shift, CNF_CMD, SDCREN);
  39         sd_config_write32(cnf, shift, CNF_CTL_BASE, base & 0xfffe);
  40
  41         return 0;
  42 }
  43 EXPORT_SYMBOL(tmio_core_mmc_resume);
  44
  45 void tmio_core_mmc_pwr(void __iomem *cnf, int state)
  46 {
  47         sd_config_write8(cnf, shift, CNF_PWR_CTL_2, state ? 0x02 : 0x00);
  48 }
  49 EXPORT_SYMBOL(tmio_core_mmc_pwr);
  50
  51 void tmio_core_mmc_clk_div(void __iomem *cnf, int state)
  52 {
  53         sd_config_write8(cnf, shift, CNF_SD_CLK_MODE, state ? 1 : 0);
  54 }
  55 EXPORT_SYMBOL(tmio_core_mmc_clk_div);
  56
  57 void tmio_core_set_bus_shift(int bus_shift)
  58 {
  59         shift = bus_shift;
  60 }
  61 EXPORT_SYMBOL(tmio_core_set_bus_shift);
  62