I needed to reflash a N25Q256 on a host system and hacked flashrom
to make this work. For this, I used the 4-Bytes address support
developed by Boris Baykov. This is why the patch is an RFC. The
whole patchset is available under github here:
https://github.com/legoater/flashrom
I can help in getting this patchset merged but do the comments
in :
http://patchwork.coreboot.org/patch/4272/
need to be all addressed or can we rework a bit the patchset to
merge the main changes separately :
- 4-bytes addressing
- W25Q256.V support
- SFDP
- Progress visualization
- ...
Tested under Linux with spidev.
Signed-off-by: Cédric Le Goater <[email protected]>
---
flashchips.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
Index: flashrom.git/flashchips.c
===================================================================
--- flashrom.git.orig/flashchips.c
+++ flashrom.git/flashchips.c
@@ -9330,6 +9330,48 @@ const struct flashchip flashchips[] = {
},
{
+ .vendor = "Micron/Numonyx/ST",
+ .name = "N25Q256..3E", /* ..3E = 3V, uniform 64KB/4KB
blocks/sectors */
+ .bustype = BUS_SPI,
+ .manufacture_id = ST_ID,
+ .model_id = ST_N25Q256__3E,
+ .total_size = 32768,
+ .page_size = 256,
+ /* supports SFDP */
+ /* OTP: 64B total; read 0x4B, write 0x42 */
+ .feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_QPI
+ | FEATURE_4BA_SUPPORT,
+ .four_bytes_addr_funcs =
+ {
+ .enter_4ba = spi_enter_4ba_b7_we, /* enter 4-bytes
addressing mode by CMD B7 + WREN */
+ .read_nbyte = spi_nbyte_read_4ba_direct, /* read
directly from any mode, no need to enter 4ba */
+ .program_byte = spi_byte_program_4ba, /* write from
4-bytes addressing mode */
+ .program_nbyte = spi_nbyte_program_4ba /* write from
4-bytes addressing mode */
+ },
+ .tested = TEST_OK_PREW,
+ .probe = probe_spi_rdid,
+ .probe_timing = TIMING_ZERO,
+ .block_erasers =
+ {
+ {
+ .eraseblocks = { {4 * 1024, 8192 } },
+ .block_erase = spi_block_erase_20_4ba,
+ }, {
+ .eraseblocks = { {64 * 1024, 512} },
+ .block_erase = spi_block_erase_d8_4ba,
+ }, {
+ .eraseblocks = { {32 * 1024 * 1024, 1} },
+ .block_erase = spi_block_erase_c7,
+ }
+ },
+ .printlock = spi_prettyprint_status_register_n25q, /*
TODO: config, lock, flag regs */
+ .unlock = spi_disable_blockprotect_n25q, /* TODO: per
64kB sector lock registers */
+ .write = spi_chip_write_256, /* Multi I/O supported */
+ .read = spi_chip_read, /* Fast read (0x0B) and multi
I/O supported */
+ .voltage = {2700, 3600},
+ },
+
+ {
.vendor = "MoselVitelic",
.name = "V29C51000B",
.bustype = BUS_PARALLEL,
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