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authorMike Frysinger <vapier@gentoo.org>2011-04-25 06:59:54 +0000
committerWolfgang Denk <wd@denx.de>2011-07-26 16:32:59 +0200
commit8875bdb34161f9fff13757161fa7d89846003d00 (patch)
tree11cf0f648c8f8f782298f09f472caa75d5fbd547 /drivers/mtd
parent66ecb7cdb03d451ddc87bc026050f5a539877bf1 (diff)
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sf: sst: support newer standardized flashes
Newer SST flashes have dropped the Auto Address Increment (AAI) word programming (WP) modes in favor of the standard page programming mode that most flashes now support. So add a flags field to the different flashes to support both modes with new and old styles. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi/sst.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index d1e8a93..9559c80 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -36,8 +36,12 @@
#define SST_SR_AAI (1 << 6) /* Addressing mode */
#define SST_SR_BPL (1 << 7) /* BP bits lock */
+#define SST_FEAT_WP (1 << 0) /* Supports AAI word program */
+#define SST_FEAT_MBP (1 << 1) /* Supports multibyte program */
+
struct sst_spi_flash_params {
u8 idcode1;
+ u8 flags;
u16 nr_sectors;
const char *name;
};
@@ -53,41 +57,51 @@ static inline struct sst_spi_flash *to_sst_spi_flash(struct spi_flash *flash)
}
#define SST_SECTOR_SIZE (4 * 1024)
+#define SST_PAGE_SIZE 256
static const struct sst_spi_flash_params sst_spi_flash_table[] = {
{
.idcode1 = 0x8d,
+ .flags = SST_FEAT_WP,
.nr_sectors = 128,
.name = "SST25VF040B",
},{
.idcode1 = 0x8e,
+ .flags = SST_FEAT_WP,
.nr_sectors = 256,
.name = "SST25VF080B",
},{
.idcode1 = 0x41,
+ .flags = SST_FEAT_WP,
.nr_sectors = 512,
.name = "SST25VF016B",
},{
.idcode1 = 0x4a,
+ .flags = SST_FEAT_WP,
.nr_sectors = 1024,
.name = "SST25VF032B",
},{
.idcode1 = 0x4b,
+ .flags = SST_FEAT_MBP,
.nr_sectors = 2048,
.name = "SST25VF064C",
},{
.idcode1 = 0x01,
+ .flags = SST_FEAT_WP,
.nr_sectors = 16,
.name = "SST25WF512",
},{
.idcode1 = 0x02,
+ .flags = SST_FEAT_WP,
.nr_sectors = 32,
.name = "SST25WF010",
},{
.idcode1 = 0x03,
+ .flags = SST_FEAT_WP,
.nr_sectors = 64,
.name = "SST25WF020",
},{
.idcode1 = 0x04,
+ .flags = SST_FEAT_WP,
.nr_sectors = 128,
.name = "SST25WF040",
},
@@ -137,7 +151,7 @@ sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf)
}
static int
-sst_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
+sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
{
size_t actual, cmd_len;
int ret;
@@ -257,9 +271,13 @@ spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode)
stm->flash.spi = spi;
stm->flash.name = params->name;
- stm->flash.write = sst_write;
+ if (stm->params->flags & SST_FEAT_WP)
+ stm->flash.write = sst_write_wp;
+ else
+ stm->flash.write = spi_flash_cmd_write_multi;
stm->flash.erase = sst_erase;
stm->flash.read = spi_flash_cmd_read_fast;
+ stm->flash.page_size = SST_PAGE_SIZE;
stm->flash.sector_size = SST_SECTOR_SIZE;
stm->flash.size = stm->flash.sector_size * params->nr_sectors;