[U-Boot-Users] Trouble in cfi_flash, help please!
Yusuf Ibrahim Ozkok
yozkok at aselsan.com.tr
Tue Jun 14 13:09:53 CEST 2005
Hi,
I'm still in trouble with cfi_flash. My previous posts on the subject can be
reached by the following links;
1.
http://sourceforge.net/mailarchive/forum.php?thread_id=7456151&forum_id=12898
2.
http://sourceforge.net/mailarchive/forum.php?thread_id=7463406&forum_id=12898
Every thing works well if I use command prompt of u-boot ( using mw.l and md
commands as Yuli suggested.)
mw.l ff000000 60606060
mw.l ff000000 d0d0d0d0
md ff000000
But somehow protect command which calls flash_real_protect insists on not to
work :-(
(Actually everything seems to be alright, but why it doesn't work!!!)
I have modified flash_real_protect() as follows, to see what is going on.
I can read status register first of all by sending the cmd 0x70. But
whenever I send the command to unprotect a block
I get a status of 0xb0 which indicates a failure!
Below in the modified function, after sending cmd_protect I send a reset and
clear status commands, because after calling protect off command at the
command prompt, sending a 0x60 results with b0 on the status register. Then
sending cmd_protect and clear_status and 0x60 results with 0x80(which is
expected to) on the status register (returns from failure condition). So I
tried that sequence in flash_real_protect().
int flash_real_protect (flash_info_t * info, long sector, int prot)
{
int retcode = 0;
/*yio: flash_print_StatusBits(info, sector);*/
flash_write_cmd (info, sector, 0, 0x70);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", 0x70,
info->start[sector], *(unsigned long *)(info->start[sector]));
flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", FLASH_CMD_CLEAR_STATUS,
info->start[sector], *(unsigned long *)(info->start[sector]));
udelay(10000); /*not needed but maybe I need to wait*/
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
udelay(10000); /*not needed but maybe I need to wait*/
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", FLASH_CMD_PROTECT,
info->start[sector], *(unsigned long *)(info->start[sector]));
flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", FLASH_CMD_RESET,
info->start[sector], *(unsigned long *)(info->start[sector]));
flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", FLASH_CMD_CLEAR_STATUS,
info->start[sector], *(unsigned long *)(info->start[sector]));
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n", FLASH_CMD_PROTECT,
info->start[sector], *(unsigned long *)(info->start[sector]));
if (prot)
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
else {
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
printf("yio: after 0x%x addr=0x%x databus: 0x%x\n",
FLASH_CMD_PROTECT_CLEAR, info->start[sector], *(unsigned long
*)(info->start[sector]));
}
if ((retcode = flash_full_status_check (info, sector, info->erase_blk_tout,
prot ? "protect" : "unprotect")) == 0) {
info->protect[sector] = prot;
/* Intel's unprotect unprotects all locking *yio/
if (prot == 0) {
flash_sect_t i;
printf("yio: entering for loop in flash_real_protect\n");
for (i = 0; i < info->sector_count; i++) {
if (info->protect[i])
flash_real_protect (info, i, 1);
}
} ~yio*/
}
printf("yio: flash_real_protect retcode=%d\n", retcode);
return retcode;
}
Debug messages are below;
=> protect off ff000000 ff03ffff
fwrite addr ff000000 cmd 70 0070007000700070 64 bit x 16 bit
yio: after 0x70 addr=0xff000000 databus: 0x800080
fwrite addr ff000000 cmd 50 0050005000500050 64 bit x 16 bit
yio: after 0x50 addr=0xff000000 databus: 0x27051956
fwrite addr ff000000 cmd 60 0060006000600060 64 bit x 16 bit
yio: after 0x60 addr=0xff000000 databus: 0xb000b0
fwrite addr ff000000 cmd ff 00ff00ff00ff00ff 64 bit x 16 bit
yio: after 0xff addr=0xff000000 databus: 0x27051956
fwrite addr ff000000 cmd 50 0050005000500050 64 bit x 16 bit
yio: after 0x50 addr=0xff000000 databus: 0x27051956
fwrite addr ff000000 cmd 60 0060006000600060 64 bit x 16 bit
yio: after 0x60 addr=0xff000000 databus: 0xb000b0
fwrite addr ff000000 cmd d0 00d000d000d000d0 64 bit x 16 bit
yio: after 0xd0 addr=0xff000000 databus: 0x27051956
yio: in flash_isset
flash_is_busy: 1
yio: in flash_isset
flash_is_busy: 1
yio: in flash_isset
flash_is_busy: 1
yio: in flash_isset
flash_is_busy: 1
yio: in flash_isset
flash_is_busy: 1
yio: in flash_isset
flash_is_busy: 1
long addr is at ff000000 info->portwidth = 8
addr[0] = 0x27
addr[1] = 0x5
addr[2] = 0x19
addr[3] = 0x56
addr[4] = 0x55
addr[5] = 0x2d
addr[6] = 0x42
addr[7] = 0x6f
addr[8] = 0x6f
addr[9] = 0x74
addr[a] = 0x20
addr[b] = 0x31
addr[c] = 0x2e
addr[d] = 0x31
addr[e] = 0x2e
addr[f] = 0x32
addr[10] = 0x20
addr[11] = 0x28
addr[12] = 0x4a
addr[13] = 0x75
addr[14] = 0x6e
addr[15] = 0x20
addr[16] = 0x20
addr[17] = 0x37
addr[18] = 0x20
addr[19] = 0x32
addr[1a] = 0x30
addr[1b] = 0x30
addr[1c] = 0x35
addr[1d] = 0x20
addr[1e] = 0x2d
addr[1f] = 0x20
Flash unprotect timeout at address ff000000 data 326f2037
fwrite addr ff000000 cmd ff 00ff00ff00ff00ff 64 bit x 16 bit
is= cmd 80(?) addr ff000000 is= 27051956552d426f 0080008000800080
Flash unprotect error at address ff000000
yio: in flash_isset
yio: in flash_isset
yio: in flash_isset
yio: in flash_isset
yio: in flash_isset
fwrite addr ff000000 cmd ff 00ff00ff00ff00ff 64 bit x 16 bit
yio: flash_real_protect retcode=8
.Un-Protected 1 sectors
=>
Thank you very much
Yusuf Ibrahim Ozkok.
######################################################################
Dikkat:
Bu elektronik posta mesaji kisisel ve ozeldir. Eger size
gonderilmediyse lutfen gondericiyi bilgilendirip mesaji siliniz.
Firmamiza gelen ve giden mesajlar virus taramasindan gecirilmekte,
guvenlik nedeni ile kontrol edilerek saklanmaktadir. Mesajdaki
gorusler ve bakis acisi gondericiye ait olup Aselsan A.S. resmi
gorusu olmak zorunda degildir.
######################################################################
Attention:
This e-mail message is privileged and confidential. If you are
not the intended recipient please delete the message and notify
the sender. E-mails to and from the company are monitored for
operational reasons and in accordance with lawful business practices.
Any views or opinions presented are solely those of the author and
do not necessarily represent the views of the company.
######################################################################
More information about the U-Boot
mailing list