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authorDaisuke Nojiri <dnojiri@chromium.org>2015-02-17 13:35:20 -0800
committerPatrick Georgi <pgeorgi@google.com>2015-04-17 10:10:52 +0200
commitf0d038f469b1b7aa0e22bc214be1a6c9bc554ae4 (patch)
treee9de781de7451368ae4843db5feb3850e331025d /src
parent7dcc48b75d1e2dc67a0543ac58f1a846ad7aadba (diff)
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flash: use two bytes of device ID to identify stmicro chips
stmicro flash chips use 2 bytes as a device id: upper byte for memory type and lower byte for capacity. with this change, we will use all 2 bytes to identify a chip. BUG=none BRANCH=broadcom-firmware TEST=booted purin and verified n25q256a was identified. Change-Id: I8f382eddc4fa70d3deceb4f9d2e82026a7025629 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 12f70a1d4b7e1142afec9ce097c4a21b6225f66e Original-Change-Id: Id3378a77318fabb74ddb30f1a9549010636872ba Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Reviewed-on: https://chrome-internal-review.googlesource.com/199387 Original-Reviewed-by: Corneliu Doban <cdoban@broadcom.com> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Commit-Queue: Daisuke Nojiri <dnojiri@google.com> Original-Tested-by: Daisuke Nojiri <dnojiri@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/251305 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/9774 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Diffstat (limited to 'src')
-rw-r--r--src/drivers/spi/stmicro.c64
1 files changed, 34 insertions, 30 deletions
diff --git a/src/drivers/spi/stmicro.c b/src/drivers/spi/stmicro.c
index c959edab3..3e35120b3 100644
--- a/src/drivers/spi/stmicro.c
+++ b/src/drivers/spi/stmicro.c
@@ -46,15 +46,19 @@
#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
-#define STM_ID_M25P10 0x11
-#define STM_ID_M25P16 0x15
-#define STM_ID_M25P20 0x12
-#define STM_ID_M25P32 0x16
-#define STM_ID_M25P40 0x13
-#define STM_ID_M25P64 0x17
-#define STM_ID_M25P80 0x14
-#define STM_ID_M25P128 0x18
-#define STM_ID_USE_ALT_ID 0xFF
+/*
+ * Device ID = (memory_type << 8) + memory_capacity
+ */
+#define STM_ID_M25P10 0x2011
+#define STM_ID_M25P16 0x2015
+#define STM_ID_M25P20 0x2012
+#define STM_ID_M25P32 0x2016
+#define STM_ID_M25P40 0x2013
+#define STM_ID_M25P64 0x2017
+#define STM_ID_M25P80 0x2014
+#define STM_ID_M25P128 0x2018
+#define STM_ID_N25Q256A 0xba19
+#define STM_ID_N25Q128 0xbb18
/* Some SPI flash share the same .idcode1 (idcode[2]). To handle this without
* (possibly) breaking existing implementations, add the new device at the top
@@ -62,9 +66,8 @@
* is then (idcode[1] << 8 | idcode[2]).
*/
struct stmicro_spi_flash_params {
- u8 idcode1;
+ u16 device_id;
u8 op_erase;
- u16 id;
u16 page_size;
u16 pages_per_sector;
u16 nr_sectors;
@@ -85,8 +88,7 @@ static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
- .idcode1 = STM_ID_USE_ALT_ID,
- .id = 0xbb18,
+ .device_id = STM_ID_N25Q128,
.op_erase = CMD_M25PXX_SSE,
.page_size = 256,
.pages_per_sector = 16,
@@ -94,7 +96,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "N25Q128",
},
{
- .idcode1 = STM_ID_M25P10,
+ .device_id = STM_ID_M25P10,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 128,
@@ -102,7 +104,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P10",
},
{
- .idcode1 = STM_ID_M25P16,
+ .device_id = STM_ID_M25P16,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -110,7 +112,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P16",
},
{
- .idcode1 = STM_ID_M25P20,
+ .device_id = STM_ID_M25P20,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -118,7 +120,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P20",
},
{
- .idcode1 = STM_ID_M25P32,
+ .device_id = STM_ID_M25P32,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -126,7 +128,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P32",
},
{
- .idcode1 = STM_ID_M25P40,
+ .device_id = STM_ID_M25P40,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -134,7 +136,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P40",
},
{
- .idcode1 = STM_ID_M25P64,
+ .device_id = STM_ID_M25P64,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -142,7 +144,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P64",
},
{
- .idcode1 = STM_ID_M25P80,
+ .device_id = STM_ID_M25P80,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
@@ -150,13 +152,20 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
.name = "M25P80",
},
{
- .idcode1 = STM_ID_M25P128,
+ .device_id = STM_ID_M25P128,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
+ {
+ .device_id = STM_ID_N25Q256A,
+ .page_size = 256,
+ .pages_per_sector = 256,
+ .nr_sectors = 512,
+ .name = "N25Q256A",
+ },
};
static int stmicro_write(struct spi_flash *flash,
@@ -229,8 +238,7 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
unsigned int i;
if (idcode[0] == 0xff) {
- i = spi_flash_cmd(spi, CMD_M25PXX_RES,
- idcode, 4);
+ i = spi_flash_cmd(spi, CMD_M25PXX_RES, idcode, 4);
if (i)
return NULL;
if ((idcode[3] & 0xf0) == 0x10) {
@@ -243,18 +251,14 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
- if (params->idcode1 == STM_ID_USE_ALT_ID) {
- if (params->id == ((idcode[1] << 8) | idcode[2])) {
- break;
- }
- }
- else if (params->idcode1 == idcode[2]) {
+ if (params->device_id == (idcode[1] << 8 | idcode[2])) {
break;
}
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
- printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x\n", idcode[1]);
+ printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x%02x\n",
+ idcode[1], idcode[2]);
return NULL;
}