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authorJens Scharsig (BuS Elektronik) <esw@bus-elektronik.de>2012-01-27 09:29:53 +0100
committerStefan Roese <sr@denx.de>2012-02-09 09:45:40 +0100
commita9f5faba6e2c5819fc1ebeef02fad1726721f849 (patch)
tree513dfc3dcf782b42113e801d945c4c98df74af14
parent137703b811502dfea364650fb3e17f20b4c21333 (diff)
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* 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>
-rw-r--r--drivers/mtd/cfi_flash.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 5494bcf..722c3fc 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: