[U-Boot] [PATCH] nios2: add altera cf reset

[Thomas Chou]

This patch toggles power to reset the cf card.

Signed-off-by: Thomas Chou <thomas at wytron.com.tw>
---
 board/altera/common/cfide.c |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)
 create mode 100644 board/altera/common/cfide.c

diff --git a/board/altera/common/cfide.c b/board/altera/common/cfide.c
new file mode 100644
index 0000000..665c85d
--- /dev/null
+++ b/board/altera/common/cfide.c
@@ -0,0 +1,34 @@
+/*
+ * Altera CF drvier
+ *
+ * (C) Copyright 2010, Thomas Chou <thomas at 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)
+{
+	if (idereset) {
+		writel(ALTERA_CF_CTL_STATUS_RESET_MSK,	/* power down */
+		       CONFIG_SYS_CF_CTL_BASE + ALTERA_CF_CTL_STATUS);
+		udelay(500 * 1000);	/* 0.5 sec delay */
+		writel(ALTERA_CF_CTL_STATUS_POWER_MSK,	/* power up */
+		       CONFIG_SYS_CF_CTL_BASE + ALTERA_CF_CTL_STATUS);
+		udelay(500 * 1000);	/* 0.5 sec delay */
+	}
+}
+#endif
-- 
1.6.6.1