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Add support for ST M25P05/M25P10 chips that only respond to RES and not RDID

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Unfortunately, either the datasheets are wrong or both chips have
exactly the same ID.

Corresponding to flashrom svn r662.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
This commit is contained in:
Carl-Daniel Hailfinger 2009-07-23 01:40:20 +00:00
parent f8555e24a4
commit 32961be12d
2 changed files with 40 additions and 0 deletions
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38
flashchips.c
View File

@ -2249,6 +2249,27 @@ struct flashchip flashchips[] = {
.read = spi_chip_read,
},
/* The ST M25P05 is a bit of a problem. It has the same ID as the
* ST M25P05-A in RES mode, but supports only 128 byte writes instead
* of 256 byte writes. We rely heavily on the fact that probe_spi_res
* only is successful if RDID does not work.
*/
{
.vendor = "ST",
.name = "M25P05.RES",
.bustype = CHIP_BUSTYPE_SPI,
.manufacture_id = ST_ID,
.model_id = ST_M25P05_RES,
.total_size = 64,
.page_size = 256,
.tested = TEST_UNTESTED,
.probe = probe_spi_res,
.probe_timing = TIMING_ZERO,
.erase = spi_chip_erase_c7,
.write = spi_chip_write_1, /* 128 */
.read = spi_chip_read,
},
{
.vendor = "ST",
.name = "M25P10-A",
@ -2265,6 +2286,23 @@ struct flashchip flashchips[] = {
.read = spi_chip_read,
},
/* The ST M25P10 has the same problem as the M25P05. */
{
.vendor = "ST",
.name = "M25P10.RES",
.bustype = CHIP_BUSTYPE_SPI,
.manufacture_id = ST_ID,
.model_id = ST_M25P10_RES,
.total_size = 128,
.page_size = 256,
.tested = TEST_UNTESTED,
.probe = probe_spi_res,
.probe_timing = TIMING_ZERO,
.erase = spi_chip_erase_c7,
.write = spi_chip_write_1, /* 128 */
.read = spi_chip_read,
},
{
.vendor = "ST",
.name = "M25P20",

2
flashchips.h
View File

@ -322,7 +322,9 @@
*/
#define ST_ID 0x20 /* ST / SGS/Thomson */
#define ST_M25P05A 0x2010
#define ST_M25P05_RES 0x10 /* Same code as M25P10. */
#define ST_M25P10A 0x2011
#define ST_M25P10_RES 0x10 /* Same code as M25P05. */
#define ST_M25P20 0x2012
#define ST_M25P40 0x2013
#define ST_M25P40_RES 0x12