diff options
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 65 | ||||
| -rw-r--r-- | include/flash.h | 1 |
2 files changed, 44 insertions, 22 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index 50df9b0..f0f301a 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -1391,6 +1391,40 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) */ #ifdef CONFIG_SYS_FLASH_PROTECTION +static int cfi_protect_bugfix(flash_info_t *info, long sector, int prot) +{ + if ((info->manufacturer_id == (uchar)INTEL_MANUFACT) && + (info->device_id == NUMONYX_256MBIT)) { + /* + * see errata called + * "Numonyx Axcell P33/P30 Specification Update" :) + */ + flash_write_cmd(info, sector, 0, FLASH_CMD_READ_ID); + if (!flash_isequal(info, sector, FLASH_OFFSET_PROTECT, + prot)) { + /* + * cmd must come before FLASH_CMD_PROTECT + 20us + * Disable interrupts which might cause a timeout here. + */ + int flag = disable_interrupts(); + unsigned short cmd; + + if (prot) + cmd = FLASH_CMD_PROTECT_SET; + else + cmd = FLASH_CMD_PROTECT_CLEAR; + flash_write_cmd(info, sector, 0, + FLASH_CMD_PROTECT); + flash_write_cmd(info, sector, 0, cmd); + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + } + return 1; + } + return 0; +} + int flash_real_protect (flash_info_t * info, long sector, int prot) { int retcode = 0; @@ -1399,31 +1433,18 @@ int flash_real_protect (flash_info_t * info, long sector, int prot) case CFI_CMDSET_INTEL_PROG_REGIONS: case CFI_CMDSET_INTEL_STANDARD: case CFI_CMDSET_INTEL_EXTENDED: - /* - * see errata called - * "Numonyx Axcell P33/P30 Specification Update" :) - */ - flash_write_cmd (info, sector, 0, FLASH_CMD_READ_ID); - if (!flash_isequal (info, sector, FLASH_OFFSET_PROTECT, - prot)) { - /* - * cmd must come before FLASH_CMD_PROTECT + 20us - * Disable interrupts which might cause a timeout here. - */ - int flag = disable_interrupts (); - unsigned short cmd; - + if (!cfi_protect_bugfix(info, sector, prot)) { + flash_write_cmd(info, sector, 0, + FLASH_CMD_CLEAR_STATUS); + flash_write_cmd(info, sector, 0, + FLASH_CMD_PROTECT); if (prot) - cmd = FLASH_CMD_PROTECT_SET; + flash_write_cmd(info, sector, 0, + FLASH_CMD_PROTECT_SET); else - cmd = FLASH_CMD_PROTECT_CLEAR; + flash_write_cmd(info, sector, 0, + FLASH_CMD_PROTECT_CLEAR); - flash_write_cmd (info, sector, 0, - FLASH_CMD_PROTECT); - flash_write_cmd (info, sector, 0, cmd); - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts (); } break; case CFI_CMDSET_AMD_EXTENDED: diff --git a/include/flash.h b/include/flash.h index 0ca70d9..e614d07 100644 --- a/include/flash.h +++ b/include/flash.h @@ -348,6 +348,7 @@ extern flash_info_t *flash_get_info(ulong base); #define TOSH_ID_FVT160 0xC2 /* TC58FVT160 ID (16 M, top ) */ #define TOSH_ID_FVB160 0x43 /* TC58FVT160 ID (16 M, bottom ) */ #define PHILIPS_LPC2292 0x0401FF13 /* LPC2292 internal FLASH */ +#define NUMONYX_256MBIT 0x8922 /* Numonyx P33/30 256MBit 65nm */ /*----------------------------------------------------------------------- * Internal FLASH identification codes |