[flashrom] [PATCH] ST M25P RES support
Carl-Daniel Hailfinger
c-d.hailfinger.devel.2006 at gmx.net
Thu Jul 23 03:16:03 CEST 2009
Add support for old ST M25P05/M25P10 chips which only respond to the RES
command and not the RDID command.
Unfortunately, either the datasheets are wrong or both chips have
exactly the same ID.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>
Index: flashrom-sst25_res/flashchips.c
===================================================================
--- flashrom-sst25_res/flashchips.c (Revision 659)
+++ flashrom-sst25_res/flashchips.c (Arbeitskopie)
@@ -2249,8 +2249,29 @@
.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",
.bustype = CHIP_BUSTYPE_SPI,
.manufacture_id = ST_ID,
@@ -2265,8 +2286,25 @@
.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",
.bustype = CHIP_BUSTYPE_SPI,
.manufacture_id = ST_ID,
Index: flashrom-sst25_res/flashchips.h
===================================================================
--- flashrom-sst25_res/flashchips.h (Revision 659)
+++ flashrom-sst25_res/flashchips.h (Arbeitskopie)
@@ -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
--
http://www.hailfinger.org/
More information about the flashrom
mailing list