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authorStephan Linz <linz@li-pro.net>2012-08-02 20:47:29 +0200
committerMike Frysinger <vapier@gentoo.org>2012-08-09 20:41:54 -0400
commit63ff6a66aef4d838fa6e3737d3e242697c0a591d (patch)
tree2fe78294ddfcd08ab1ec73244fa5160349c8478a
parentc969abc47033d6f810d3c9dbdb994ea9d691d038 (diff)
sf: stmicro: support JEDEC standard two-byte signature
There are more than the M25Pxx serial flashs that can be used with the stmicro driver, for example: the M25PXxx or N25Qxx serie. All these chips have burned in the original stmicro manufacture id 0x20 together with a standard two-byte signature. In preperation to support all these chips the stmicro driver have to decode the full two-byte signature. Signed-off-by: Stephan Linz <linz@li-pro.net> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--drivers/mtd/spi/stmicro.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index dbd1fc18543..706bb8e4bde 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -37,7 +37,7 @@
#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
struct stmicro_spi_flash_params {
- u8 idcode1;
+ u16 id;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
@@ -45,55 +45,55 @@ struct stmicro_spi_flash_params {
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
- .idcode1 = 0x11,
+ .id = 0x2011,
.pages_per_sector = 128,
.nr_sectors = 4,
.name = "M25P10",
},
{
- .idcode1 = 0x15,
+ .id = 0x2015,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "M25P16",
},
{
- .idcode1 = 0x12,
+ .id = 0x2012,
.pages_per_sector = 256,
.nr_sectors = 4,
.name = "M25P20",
},
{
- .idcode1 = 0x16,
+ .id = 0x2016,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "M25P32",
},
{
- .idcode1 = 0x13,
+ .id = 0x2013,
.pages_per_sector = 256,
.nr_sectors = 8,
.name = "M25P40",
},
{
- .idcode1 = 0x17,
+ .id = 0x2017,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "M25P64",
},
{
- .idcode1 = 0x14,
+ .id = 0x2014,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "M25P80",
},
{
- .idcode1 = 0x18,
+ .id = 0x2018,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
{
- .idcode1 = 0x19,
+ .id = 0xba19,
.pages_per_sector = 256,
.nr_sectors = 512,
.name = "N25Q256",
@@ -105,6 +105,7 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
const struct stmicro_spi_flash_params *params;
struct spi_flash *flash;
unsigned int i;
+ u16 id;
if (idcode[0] == 0xff) {
i = spi_flash_cmd(spi, CMD_M25PXX_RES,
@@ -119,15 +120,17 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
return NULL;
}
+ id = ((idcode[1] << 8) | idcode[2]);
+
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
- if (params->idcode1 == idcode[2]) {
+ if (params->id == id) {
break;
}
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
- debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
+ debug("SF: Unsupported STMicro ID %04x\n", id);
return NULL;
}