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sf: stmicro: support JEDEC standard two-byte signature

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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>
This commit is contained in:
Stephan Linz 2012-08-02 20:47:29 +02:00 • committed by Mike Frysinger
parent c969abc470
commit 63ff6a66ae
1 changed files with 15 additions and 12 deletions
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27
drivers/mtd/spi/stmicro.c
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@ -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;
}