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>
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 @@
}
#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 @@
}
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 @@
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;