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 --- board/atmel/atstk1000/flash.c | 31 ++++++++++++++++++++++--------- 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)