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 --- drivers/mtd/spi/sst.c | 22 ++++++++++++++++++++-- 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;