board/altera/common/cfide.c

   1 /*
   2  * Altera CF drvier
   3  *
   4  * (C) Copyright 2010, Thomas Chou <thomas@wytron.com.tw>
   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 #include <common.h>
  11 #include <asm/io.h>
  12
  13 #if defined(CONFIG_IDE_RESET) && defined(CONFIG_SYS_CF_CTL_BASE)
  14 /* ide_set_reset for Altera CF interface */
  15 #define ALTERA_CF_CTL_STATUS                    0
  16 #define ALTERA_CF_IDE_CTL                       4
  17 #define ALTERA_CF_CTL_STATUS_PRESENT_MSK        (0x1)
  18 #define ALTERA_CF_CTL_STATUS_POWER_MSK          (0x2)
  19 #define ALTERA_CF_CTL_STATUS_RESET_MSK          (0x4)
  20 #define ALTERA_CF_CTL_STATUS_IRQ_EN_MSK (0x8)
  21 #define ALTERA_CF_IDE_CTL_IRQ_EN_MSK            (0x1)
  22
  23 void ide_set_reset(int idereset)
  24 {
  25         int i;
  26         writel(idereset ? ALTERA_CF_CTL_STATUS_RESET_MSK :
  27                ALTERA_CF_CTL_STATUS_POWER_MSK,
  28                CONFIG_SYS_CF_CTL_BASE + ALTERA_CF_CTL_STATUS);
  29         /* wait 500 ms for power to stabilize */
  30         for (i = 0; i < 500; i++)
  31                 udelay(1000);
  32 }
  33 #endif