This patch updated the spi_flash read func to support all sizes of flashes using bank reg addr facility.

The same support has been added in below patch for erase/write spi_flash functions: "sf: Support all sizes of flashes using bank addr reg facility" (sha1: c956f600cbb0943d0afe1004cdb503f4fcd8f415)

With these new updates on sf framework, the flashes which has < 16MB are not effected as per as performance is concern and but the u-boot.bin size incrased ~600 bytes.

sf update(for first 16MBytes), Changes before: U-Boot> sf update 0x1000000 0x0 0x1000000 - N25Q256 16777216 bytes written, 0 bytes skipped in 199.72s, speed 86480 B/s - W25Q128BV 16777216 bytes written, 0 bytes skipped in 351.739s, speed 48913 B/s - S25FL256S_64K 16777216 bytes written, 0 bytes skipped in 65.659s, speed 262144 B/s

sf update(for first 16MBytes), Changes before: U-Boot> sf update 0x1000000 0x0 0x1000000 - N25Q256 16777216 bytes written, 0 bytes skipped in 198.953s, speed 86480 B/s - W25Q128BV 16777216 bytes written, 0 bytes skipped in 350.90s, speed 49200 B/s - S25FL256S_64K 16777216 bytes written, 0 bytes skipped in 66.521s, speed 262144 B/s

Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- Changes for v3: - none Changes for v2: - none

drivers/mtd/spi/spi_flash.c | 36 +++++++++++++++++++++++++++++++++--- 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 5386884..40c0389 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,