From 25584de9d0108a5dde41e0296fdf0a7854390a81 Mon Sep 17 00:00:00 2001 From: Wei Hu Date: Mon, 30 Apr 2018 14:02:08 -0700 Subject: flashchips: Add SST26VF016B(A), SST26VF032B(A), SST26VF064B(A) This patch seems to have originally been from https://patchwork.coreboot.org/patch/4126/ . The most recent version seems to be in OpenEmbedded (commit 503a572) which added support for 16Mbit and 32Mbit variants. The OpenEmbedded patch also makes changes to linux_spi.c to add some debug prints which are omitted in this version. From the original commit message: Differences between SST26 and SST25: 1. The WREN instruction must be executed prior to WRSR [Section 5.31]. There is no EWSR. 2. Block protection bits are no longer in the status register. There is a dedicated 144-bit register [Table 5-6]. The device is write-protected by default. A Global Block-Protection Unlock command unlocks the entire memory [Section 4.1]. Change-Id: Ib019bed8ce955049703eb3376c32a83ef607c219 Signed-off-by: Wei Hu Signed-off-by: David Hendricks Signed-off-by: Stefan Tauner Reviewed-on: https://review.coreboot.org/25962 Tested-by: build bot (Jenkins) --- spi25_statusreg.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'spi25_statusreg.c') diff --git a/spi25_statusreg.c b/spi25_statusreg.c index 67d676c79..a5fb3b8bd 100644 --- a/spi25_statusreg.c +++ b/spi25_statusreg.c @@ -195,6 +195,19 @@ int spi_disable_blockprotect(struct flashctx *flash) return spi_disable_blockprotect_generic(flash, 0x3C, 0, 0, 0xFF); } +int spi_disable_blockprotect_sst26_global_unprotect(struct flashctx *flash) +{ + int result = spi_write_enable(flash); + if (result) + return result; + + static const unsigned char cmd[] = { 0x98 }; /* ULBPR */ + result = spi_send_command(flash, sizeof(cmd), 0, cmd, NULL); + if (result) + msg_cerr("ULBPR failed\n"); + return result; +} + /* A common block protection disable that tries to unset the status register bits masked by 0x0C (BP0-1) and * protected/locked by bit #7. Useful when bits 4-5 may be non-0). */ int spi_disable_blockprotect_bp1_srwd(struct flashctx *flash) -- cgit v1.2.3