X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fcfi_flash.c;h=2e3748081e369c13d0922fec61ac7114f02ccf91;hb=b86d7622b33892b1dafe761a7a9eaeeab9f3816b;hp=ff4d85f3f0dd60f1edc0c00516092fe7dc78e42f;hpb=951a954b77ef30df1f5c1b7b9b4312e783b2cbb4;p=platform%2Fkernel%2Fu-boot.git diff --git a/drivers/cfi_flash.c b/drivers/cfi_flash.c index ff4d85f..2e37480 100644 --- a/drivers/cfi_flash.c +++ b/drivers/cfi_flash.c @@ -117,6 +117,7 @@ #define FLASH_OFFSET_CFI 0x55 #define FLASH_OFFSET_CFI_RESP 0x10 #define FLASH_OFFSET_PRIMARY_VENDOR 0x13 +#define FLASH_OFFSET_EXT_QUERY_T_P_ADDR 0x15 /* extended query table primary addr */ #define FLASH_OFFSET_WTOUT 0x1F #define FLASH_OFFSET_WBTOUT 0x20 #define FLASH_OFFSET_ETOUT 0x21 @@ -346,6 +347,10 @@ unsigned long flash_init (void) unsigned long size = 0; int i; +#ifdef CFG_FLASH_PROTECTION + char *s = getenv("unlock"); +#endif + /* Init: no FLASHes known */ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; @@ -357,15 +362,39 @@ unsigned long flash_init (void) #endif /* CFG_FLASH_QUIET_TEST */ } #ifdef CFG_FLASH_PROTECTION - else { - char *s = getenv("unlock"); + else if ((s != NULL) && (strcmp(s, "yes") == 0)) { + /* + * Only the U-Boot image and it's environment is protected, + * all other sectors are unprotected (unlocked) if flash + * hardware protection is used (CFG_FLASH_PROTECTION) and + * the environment variable "unlock" is set to "yes". + */ + if (flash_info[i].legacy_unlock) { + int k; - if (((s = getenv("unlock")) != NULL) && (strcmp(s, "yes") == 0)) { /* - * Only the U-Boot image and it's environment is protected, - * all other sectors are unprotected (unlocked) if flash - * hardware protection is used (CFG_FLASH_PROTECTION) and - * the environment variable "unlock" is set to "yes". + * Disable legacy_unlock temporarily, since + * flash_real_protect would relock all other sectors + * again otherwise. + */ + flash_info[i].legacy_unlock = 0; + + /* + * Legacy unlocking (e.g. Intel J3) -> unlock only one + * sector. This will unlock all sectors. + */ + flash_real_protect (&flash_info[i], 0, 0); + + flash_info[i].legacy_unlock = 1; + + /* + * Manually mark other sectors as unlocked (unprotected) + */ + for (k = 1; k < flash_info[i].sector_count; k++) + flash_info[i].protect[k] = 0; + } else { + /* + * No legancy unlocking -> unlock all sectors */ flash_protect (FLAG_PROTECT_CLEAR, flash_info[i].start[0], @@ -668,8 +697,12 @@ int flash_real_protect (flash_info_t * info, long sector, int prot) prot ? "protect" : "unprotect")) == 0) { info->protect[sector] = prot; - /* Intel's unprotect unprotects all locking */ - if (prot == 0) { + + /* + * On some of Intel's flash chips (marked via legacy_unlock) + * unprotect unprotects all locking. + */ + if ((prot == 0) && (info->legacy_unlock)) { flash_sect_t i; for (i = 0; i < info->sector_count; i++) { @@ -746,6 +779,10 @@ static int flash_status_check (flash_info_t * info, flash_sect_t sector, { ulong start; +#if CFG_HZ != 1000 + tout *= CFG_HZ/1000; +#endif + /* Wait for command completion */ start = get_timer (0); while (flash_is_busy (info, sector)) { @@ -878,18 +915,27 @@ static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr.cp, cmd, cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH); *addr.cp = cword.c; +#ifdef CONFIG_BLACKFIN + asm("ssync;"); +#endif break; case FLASH_CFI_16BIT: debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr.wp, cmd, cword.w, info->chipwidth << CFI_FLASH_SHIFT_WIDTH); *addr.wp = cword.w; +#ifdef CONFIG_BLACKFIN + asm("ssync;"); +#endif break; case FLASH_CFI_32BIT: debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr.lp, cmd, cword.l, info->chipwidth << CFI_FLASH_SHIFT_WIDTH); *addr.lp = cword.l; +#ifdef CONFIG_BLACKFIN + asm("ssync;"); +#endif break; case FLASH_CFI_64BIT: #ifdef DEBUG @@ -904,6 +950,9 @@ static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset } #endif *addr.llp = cword.ll; +#ifdef CONFIG_BLACKFIN + asm("ssync;"); +#endif break; } } @@ -1070,6 +1119,10 @@ ulong flash_get_size (ulong base, int banknum) uchar num_erase_regions; int erase_region_size; int erase_region_count; +#ifdef CFG_FLASH_PROTECTION + int ext_addr; + info->legacy_unlock = 0; +#endif info->start[0] = base; @@ -1083,6 +1136,13 @@ ulong flash_get_size (ulong base, int banknum) case CFI_CMDSET_INTEL_EXTENDED: default: info->cmd_reset = FLASH_CMD_RESET; +#ifdef CFG_FLASH_PROTECTION + /* read legacy lock/unlock bit from intel flash */ + ext_addr = flash_read_ushort (info, 0, + FLASH_OFFSET_EXT_QUERY_T_P_ADDR); + info->legacy_unlock = + flash_read_uchar (info, ext_addr + 5) & 0x08; +#endif break; case CFI_CMDSET_AMD_STANDARD: case CFI_CMDSET_AMD_EXTENDED: @@ -1148,8 +1208,9 @@ ulong flash_get_size (ulong base, int banknum) info->buffer_size = (1 << flash_read_ushort (info, 0, FLASH_OFFSET_BUFFER_SIZE)); tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT); info->erase_blk_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT))); - tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT); - info->buffer_write_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT))); + tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT)) * + (1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT)); + info->buffer_write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0); /* round up when converting to ms */ tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT)) * (1 << flash_read_uchar (info, FLASH_OFFSET_WMAX_TOUT)); info->write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0); /* round up when converting to ms */