#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;
};
}
#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",
},
};
-static int
-sst_wait_ready(struct spi_flash *flash, unsigned long timeout)
-{
- struct spi_slave *spi = flash->spi;
- unsigned long timebase;
- int ret;
- u8 byte = CMD_SST_RDSR;
-
- ret = spi_xfer(spi, sizeof(byte) * 8, &byte, NULL, SPI_XFER_BEGIN);
- if (ret) {
- debug("SF: Failed to send command %02x: %d\n", byte, ret);
- return ret;
- }
-
- timebase = get_timer(0);
- do {
- ret = spi_xfer(spi, sizeof(byte) * 8, NULL, &byte, 0);
- if (ret)
- break;
-
- if ((byte & SST_SR_WIP) == 0)
- break;
-
- } while (get_timer(timebase) < timeout);
-
- spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
-
- if (!ret && (byte & SST_SR_WIP) != 0)
- ret = -1;
-
- if (ret)
- debug("SF: sst wait for ready timed out\n");
- return ret;
-}
-
static int
sst_enable_writing(struct spi_flash *flash)
{
- int ret = spi_flash_cmd(flash->spi, CMD_SST_WREN, NULL, 0);
+ int ret = spi_flash_cmd_write_enable(flash);
if (ret)
debug("SF: Enabling Write failed\n");
return ret;
static int
sst_disable_writing(struct spi_flash *flash)
{
- int ret = spi_flash_cmd(flash->spi, CMD_SST_WRDI, NULL, 0);
+ int ret = spi_flash_cmd_write_disable(flash);
if (ret)
debug("SF: Disabling Write failed\n");
return ret;
}
-static int
-sst_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf)
-{
- u8 cmd[5] = {
- CMD_READ_ARRAY_FAST,
- offset >> 16,
- offset >> 8,
- offset,
- 0x00,
- };
- return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
-}
-
static int
sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf)
{
if (ret)
return ret;
- return sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ return spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
}
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;
break;
}
- ret = sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
break;
return ret;
}
-int
-sst_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
{
- unsigned long sector_size;
- u32 start, end;
- int ret;
- u8 cmd[4];
-
- /*
- * This function currently uses sector erase only.
- * Probably speed things up by using bulk erase
- * when possible.
- */
-
- sector_size = SST_SECTOR_SIZE;
-
- if (offset % sector_size) {
- debug("SF: Erase offset not multiple of sector size\n");
- return -1;
- }
-
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: Unable to claim SPI bus\n");
- return ret;
- }
-
- cmd[0] = CMD_SST_SE;
- cmd[3] = 0;
- start = offset;
- end = start + len;
-
- ret = 0;
- while (offset < end) {
- cmd[1] = offset >> 16;
- cmd[2] = offset >> 8;
- offset += sector_size;
-
- debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
- cmd[2], cmd[3], offset);
-
- ret = sst_enable_writing(flash);
- if (ret)
- break;
-
- ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
- if (ret) {
- debug("SF: sst page erase failed\n");
- break;
- }
-
- ret = sst_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
- if (ret)
- break;
- }
-
- debug("SF: sst: Successfully erased %lu bytes @ 0x%x\n",
- len * sector_size, start);
-
- spi_release_bus(flash->spi);
- return ret;
+ return spi_flash_cmd_erase(flash, CMD_SST_SE, offset, len);
}
static int
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 = sst_read_fast;
- stm->flash.size = SST_SECTOR_SIZE * params->nr_sectors;
-
- debug("SF: Detected %s with page size %u, total %u bytes\n",
- params->name, SST_SECTOR_SIZE, stm->flash.size);
+ 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;
/* Flash powers up read-only, so clear BP# bits */
sst_unlock(&stm->flash);
projects / oweals / u-boot.git / blobdiff