From a9f5faba6e2c5819fc1ebeef02fad1726721f849 Mon Sep 17 00:00:00 2001
From: "Jens Scharsig (BuS Elektronik)" <esw@bus-elektronik.de>
Date: Fri, 27 Jan 2012 09:29:53 +0100
Subject: [PATCH] * Fix: watchdog timed out, if flash blank (0xFF) blocks
The current implementation of cfi_flash uses udelay to reset watchdog.
If several blocks are blank (0xff filled) the watchdog timed out.
The reason is, udelay is never called, if flash device is ready to fast.
e.g.
mw.w $(copy_addr) FFFF 10000;cp.b $(copy_addr) 10880000 20000
-> watchdog timed out
mw.w $(copy_addr) 0000 10000;cp.b $(copy_addr) 10880000 20000
-> watchdog not timed out
This patch adds an extra watchdog reset in front of flash ready check.
Signed-off-by: Jens Scharsig (BuS Elektronik) <esw@bus-elektronik.de>
Signed-off-by: Stefan Roese <sr@denx.de>
---
drivers/mtd/cfi_flash.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 5494bcffa7..722c3fc7bd 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -40,6 +40,7 @@
#include <asm/byteorder.h>
#include <environment.h>
#include <mtd/cfi_flash.h>
+#include <watchdog.h>
/*
* This file implements a Common Flash Interface (CFI) driver for
@@ -577,6 +578,7 @@ static int flash_status_check (flash_info_t * info, flash_sect_t sector,
reset_timer();
#endif
start = get_timer (0);
+ WATCHDOG_RESET();
while (flash_is_busy (info, sector)) {
if (get_timer (start) > tout) {
printf ("Flash %s timeout at address %lx data %lx\n",
@@ -668,6 +670,7 @@ static int flash_status_poll(flash_info_t *info, void *src, void *dst,
reset_timer();
#endif
start = get_timer(0);
+ WATCHDOG_RESET();
while (1) {
switch (info->portwidth) {
case FLASH_CFI_8BIT:
--
2.39.5