diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi/spi_flash.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 7f1ef1778..562f6adb5 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -148,7 +148,9 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *data) { - u8 cmd[5]; + u8 cmd[5], bank_sel; + u32 remain_len, read_len; + int ret = -1; /* Handle memory-mapped SPI */ if (flash->memory_map) { @@ -157,10 +159,38 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, } cmd[0] = CMD_READ_ARRAY_FAST; - spi_flash_addr(offset, cmd); cmd[4] = 0x00; - return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len); + while (len) { + bank_sel = offset / SPI_FLASH_16MB_BOUN; + + ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); + if (ret) { + debug("SF: fail to set bank%d\n", bank_sel); + return ret; + } + + remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset); + if (len < remain_len) + read_len = len; + else + read_len = remain_len; + + spi_flash_addr(offset, cmd); + + ret = spi_flash_read_common(flash, cmd, sizeof(cmd), + data, read_len); + if (ret < 0) { + debug("SF: read failed\n"); + break; + } + + offset += read_len; + len -= read_len; + data += read_len; + } + + return ret; } int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout, |