[flashrom-gerrit] [S] Change in flashrom[main]: flashchips: Add write-protect support for GD25LQ255E

[Nikolai Artemiev (Code Review)]

Nikolai Artemiev has submitted this change. ( https://review.coreboot.org/c/flashrom/+/79460?usp=email )

Change subject: flashchips: Add write-protect support for GD25LQ255E
......................................................................

flashchips: Add write-protect support for GD25LQ255E

datasheet: https://www.gigadevice.com.cn/Public/Uploads/uploadfile/files/20221129/DS-00...

BUG=b:311336475
TEST=Verified on karis

w/o this patch:
$ flashrom_tester --flashrom_binary ./flashrom internal Lock_top_quad
  --> Failed

w/ this patch:
$ flashrom_tester --flashrom_binary ./flashrom internal Lock_top_quad
  --> Pass

This lock_top_quad test did(copied from partial_lock_test()):
* Disable hardware WP so we can modify the protected range.
* Then enable software WP so the range is enforced and enable
  hardware WP so that flashrom does not disable software WP during the
  operation.
* Check that we cannot write to the protected region.
* Check that we can write to the non protected region.

Change-Id: I1425e931433c00caceaabc6037a79099d6d5eac5
Signed-off-by: Tyler Wang 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/79460
Tested-by: build bot (Jenkins) 
Reviewed-by: Nikolai Artemiev 
Reviewed-by: Hsuan-ting Chen 
---
M flashchips.c
1 file changed, 11 insertions(+), 1 deletion(-)

Approvals:
  Hsuan-ting Chen: Looks good to me, approved
  Nikolai Artemiev: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/flashchips.c b/flashchips.c
index 8c2fecd..663b01b 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -6557,7 +6557,7 @@
    	.page_size	= 256,
    	/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42, erase 0x44 */
    	.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_WRSR_EXT2 | FEATURE_4BA,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PREWB,
    	.probe		= PROBE_SPI_RDID,
    	.probe_timing	= TIMING_ZERO,
    	.block_erasers	=
@@ -6593,6 +6593,16 @@
    	.write		= SPI_CHIP_WRITE256,
    	.read		= SPI_CHIP_READ, /* Fast read (0x0B) and multi I/O supported */
    	.voltage	= {1650, 2000},
+		.reg_bits	=
+		{
+			.srp    = {STATUS1, 7, RW},
+			.srl    = {STATUS2, 0, RW},
+			.bp     = {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}},
+			.tb     = {STATUS1, 5, RW}, /* Called BP3 in datasheet, acts like TB */
+			.sec    = {STATUS1, 6, RW}, /* Called BP4 in datasheet, acts like SEC */
+			.cmp    = {STATUS2, 6, RW},
+		},
+		.decode_range	= DECODE_RANGE_SPI25,
    },

{