u-boot/board/altera/common/cfide.c
Thomas Chou e4bf588609 nios2: add altera cf reset
This patch toggles power to reset the cf card.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
2010-04-24 18:21:22 -04:00

33 lines
1,006 B
C

/*
* Altera CF drvier
*
* (C) Copyright 2010, Thomas Chou <thomas@wytron.com.tw>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <common.h>
#include <asm/io.h>
#if defined(CONFIG_IDE_RESET) && defined(CONFIG_SYS_CF_CTL_BASE)
/* ide_set_reset for Altera CF interface */
#define ALTERA_CF_CTL_STATUS 0
#define ALTERA_CF_IDE_CTL 4
#define ALTERA_CF_CTL_STATUS_PRESENT_MSK (0x1)
#define ALTERA_CF_CTL_STATUS_POWER_MSK (0x2)
#define ALTERA_CF_CTL_STATUS_RESET_MSK (0x4)
#define ALTERA_CF_CTL_STATUS_IRQ_EN_MSK (0x8)
#define ALTERA_CF_IDE_CTL_IRQ_EN_MSK (0x1)
void ide_set_reset(int idereset)
{
int i;
writel(idereset ? ALTERA_CF_CTL_STATUS_RESET_MSK :
ALTERA_CF_CTL_STATUS_POWER_MSK,
CONFIG_SYS_CF_CTL_BASE + ALTERA_CF_CTL_STATUS);
/* wait 500 ms for power to stabilize */
for (i = 0; i < 500; i++)
udelay(1000);
}
#endif