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ATSTK1000: Fix potential flash programming bug

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The (now obsolete) atngw100 flash programming code was having problems
programming the onboard at49bv642 chip. The atstk1000 flash
programming code may have the same bug, so import fix for this problem
from the AVR32 Linux BSP.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2007-04-19 10:10:11 +02:00
parent b2e1d5b644
commit 61151cccb6
1 changed files with 23 additions and 10 deletions
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33
board/atmel/atstk1000/flash.c
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@ -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 */
/*
* 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 (status != word) {
printf("Flash write error at address 0x%p: 0x%02x\n",
p, status);
ret = ERR_PROG_ERROR;
break;
}
}
if (flags)