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-rw-r--r--board/atmel/atstk1000/flash.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/board/atmel/atstk1000/flash.c b/board/atmel/atstk1000/flash.c
index 93d790f..4047825 100644
--- a/board/atmel/atstk1000/flash.c
+++ b/board/atmel/atstk1000/flash.c
@@ -159,7 +159,7 @@ int __flashprog write_buff(flash_info_t *info, uchar *src,
{
unsigned long flags;
uint16_t *base, *p, *s, *end;
- uint16_t word, status;
+ uint16_t word, status, status1;
int ret = ERR_OK;
if (addr < info->start[0]
@@ -194,20 +194,33 @@ int __flashprog write_buff(flash_info_t *info, uchar *src,
sync_write_buffer();
/* Wait for completion */
+ status1 = readw(p);
do {
/* TODO: Timeout */
- status = readw(p);
- } while ((status != word) && !(status & 0x28));
+ status = status1;
+ status1 = readw(p);
+ } while (((status ^ status1) & 0x40) /* toggled */
+ && !(status1 & 0x28)); /* error bits */
- writew(0xf0, base);
- readw(base);
-
- if (status != word) {
- printf("Flash write error at address 0x%p: 0x%02x\n",
- p, status);
+ /*
+ * We'll need to check once again for toggle bit
+ * because the toggle bit may stop toggling as I/O5
+ * changes to "1" (ref at49bv642.pdf p9)
+ */
+ status1 = readw(p);
+ status = readw(p);
+ if ((status ^ status1) & 0x40) {
+ printf("Flash write error at address 0x%p: "
+ "0x%02x != 0x%02x\n",
+ p, status,word);
ret = ERR_PROG_ERROR;
+ writew(0xf0, base);
+ readw(base);
break;
}
+
+ writew(0xf0, base);
+ readw(base);
}
if (flags)