This patch provides a support to read a flash using 'asr'
read instruction(rd_inst) for 'sf read' and 'sf update' commands.
'asr' is similar to afr(Array Fast Read) except that it's
operated under slow speeds.
Example:
read 0x2000 length bytes starting at offset 0x0 to memory at 0x10000
using asr read instruction.
u-boot> sf read asr 0x10000 0x0 0x2000
erase and write 0x2000 length bytes from memory at 0x10000 address to
flash offset at 0x0 using pp write instruction and asr read instruction.
u-boot> sf update pp asr 0x10000 0x0 0x2000
Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.t...@gmail.com>
---
common/cmd_sf.c | 10 +++++++---
include/spi_flash_inst.h | 1 +
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index b1f19ef..3d9c93e 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -279,6 +279,8 @@ static int sf_parse_rd_inst_arg(char *arg, u8 *rd_inst)
{
if (strcmp(arg, "afr") == 0)
*rd_inst = CMD_READ_ARRAY_FAST;
+ else if (strcmp(arg, "asr") == 0)
+ *rd_inst = CMD_READ_ARRAY_SLOW;
else
return 1;
@@ -628,8 +630,9 @@ U_BOOT_CMD(
"sf read rd_inst addr offset len\n"
" - read `len' bytes starting at\n"
" `offset' to memory at `addr' using\n"
- " afr `rd_inst' read instruction\n"
+ " afr | asr `rd_inst' read
instructions\n"
" afr (Array Fast Read, 0bh)\n"
+ " asr (Array Slow Read, 02b)\n"
"sf write wr_inst addr offset len\n"
" - write `len' bytes from memory\n"
" at `addr' to flash at `offset'
using\n"
@@ -644,7 +647,8 @@ U_BOOT_CMD(
" pp | qpp `wr_inst' write instructions
and\n"
" pp (Page Program, 02h)\n"
" qpp (Quad Page Program, 32h)\n"
- " afr `rd_inst' read instruction\n"
- " afr (Array Fast Read, 0bh)"
+ " afr | asr `rd_inst' read
instructions\n"
+ " afr (Array Fast Read, 0bh)\n"
+ " asr (Array Slow Read, 02b)"
SF_TEST_HELP
);
diff --git a/include/spi_flash_inst.h b/include/spi_flash_inst.h
index a530842..85c8e70 100644
--- a/include/spi_flash_inst.h
+++ b/include/spi_flash_inst.h
@@ -30,5 +30,6 @@
/* Read commands */
#define CMD_READ_ARRAY_FAST 0x0b
+#define CMD_READ_ARRAY_SLOW 0x03
#endif /* _SPI_FLASH_INST_H_ */
--
1.7.0.4
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