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=... 2. http://sourceforge.net/mailarchive/forum.php?thread_id=7463406&forum_id=...

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.

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