openwrt/flashrom
1
0
Fork 0
mirror of https://review.coreboot.org/flashrom.git synced 2025-07-02 22:43:17 +02:00
Code Issues Releases Wiki Activity

Warn of one-time programmable (OTP) memory

Browse Source 
Some flash chips contain OTP memory that we cannot read or write (yet). This
prohibits us from cloning them, hence warn the user if we detect it. Not all
variations of the tagged chips contain OTP memory. They are often only
enabled on request or have there own ordering numbers. There is usually no
way to distinguish them. Because this is a supposedly seldomly used feature
the warning is shown in with dbg verbosity.

The manpage is extended to describe the backgrounds a bit.

Corresponding to flashrom svn r1493.

This patch is based on the idea and code of Daniel Lenski.
Signed-off-by: Daniel Lenski <dlenski@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
This commit is contained in:
Daniel Lenski
2012-02-15 23:40:23 +00:00
committed by Stefan Tauner
parent b286da7ffc
commit 65922a3860
4 changed files with 62 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
flashchips.c
View File

@ -1120,7 +1120,8 @@ const struct flashchip flashchips[] = {
.model_id = AMIC_A25L032,
.total_size = 4096,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 64B total; read 0x4B, 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -1158,7 +1159,8 @@ const struct flashchip flashchips[] = {
.model_id = AMIC_A25LQ032,
.total_size = 4096,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 64B total; read 0x4B, 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -1315,7 +1317,8 @@ const struct flashchip flashchips[] = {
.model_id = ATMEL_AT25DF021,
.total_size = 256,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 128B total, 64B pre-programmed; read 0x77; write 0x9B */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -1543,7 +1546,8 @@ const struct flashchip flashchips[] = {
.model_id = ATMEL_AT25DF321A,
.total_size = 4096,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 128B total, 64B pre-programmed; read 0x77; write 0x9B */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PROBE,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -1619,7 +1623,8 @@ const struct flashchip flashchips[] = {
.model_id = ATMEL_AT25DQ161,
.total_size = 2048,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 128B total, 64B pre-programmed; read 0x77; write 0x9B */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -1657,7 +1662,8 @@ const struct flashchip flashchips[] = {
.model_id = ATMEL_AT25F512B,
.total_size = 64,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 128B total, 64B pre-programmed; read 0x77; write 0x9B */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -2168,6 +2174,8 @@ const struct flashchip flashchips[] = {
.model_id = ATMEL_AT45DB321D,
.total_size = 4096 /* Size can only be determined from status register */,
.page_size = 512 /* Size can only be determined from status register */,
/* OTP: 128B total, 64B pre-programmed; read 0x77; write 0x9B */
.feature_bits = FEATURE_OTP,
.tested = TEST_BAD_READ,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3236,8 +3244,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q40,
.total_size = 512,
.page_size = 256,
/* TODO: chip features 256-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 256B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3271,8 +3279,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q80,
.total_size = 1024,
.page_size = 256,
/* TODO: chip features 256-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 256B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3308,9 +3316,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q16,
.total_size = 2048,
.page_size = 256,
/* TODO: EN25D16 features 512-byte one-time programmable region,
* EN25Q16 features a 128-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: D16 512B/Q16 128B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3348,8 +3355,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q32,
.total_size = 4096,
.page_size = 256,
/* TODO: chip features 512-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 512B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3383,8 +3390,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q64,
.total_size = 8192,
.page_size = 256,
/* TODO: chip features 512-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 512B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3418,8 +3425,8 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25Q128,
.total_size = 16384,
.page_size = 256,
/* TODO: chip features 512-byte one-time programmable region */
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 512B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -3452,10 +3459,9 @@ const struct flashchip flashchips[] = {
.model_id = EON_EN25QH16,
.total_size = 2048,
.page_size = 256,
/* TODO: chip features 512-byte one-time programmable region
* and supports SFDP.
*/
.feature_bits = FEATURE_WRSR_WREN,
/* supports SFDP */
/* OTP: 512B total; enter 0x3A */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_UNTESTED,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -7092,6 +7098,8 @@ const struct flashchip flashchips[] = {
.model_id = ST_M25PX16,
.total_size = 2048,
.page_size = 256,
/* OTP: 64B total; read 0x4B; write 0x42 */
.feature_bits = FEATURE_OTP,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -7960,7 +7968,8 @@ const struct flashchip flashchips[] = {
.model_id = WINBOND_NEX_W25Q80,
.total_size = 1024,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -7997,7 +8006,8 @@ const struct flashchip flashchips[] = {
.model_id = WINBOND_NEX_W25Q16,
.total_size = 2048,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -8034,7 +8044,8 @@ const struct flashchip flashchips[] = {
.model_id = WINBOND_NEX_W25Q32,
.total_size = 4096,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -8071,7 +8082,8 @@ const struct flashchip flashchips[] = {
.model_id = WINBOND_NEX_W25Q64,
.total_size = 8192,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -8107,7 +8119,8 @@ const struct flashchip flashchips[] = {
.model_id = WINBOND_NEX_W25Q128,
.total_size = 16384,
.page_size = 256,
.feature_bits = FEATURE_WRSR_WREN,
/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP,
.tested = TEST_OK_PROBE,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,