From fca3b012dae98c852e2dd492b191e2cecf728583 Mon Sep 17 00:00:00 2001 From: Mattias Mattsson Date: Thu, 25 Aug 2011 22:44:11 +0000 Subject: Add support for the Sharp LH28F008BJT-BTLZ1 chip Tested by Mattias Mattsson on a PowerPC box. Corresponding to flashrom svn r1420. Signed-off-by: Mattias Mattsson Acked-by: Carl-Daniel Hailfinger Acked-by: Uwe Hermann --- 82802ab.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) (limited to '82802ab.c') diff --git a/82802ab.c b/82802ab.c index cd59c07..ff2f535 100644 --- a/82802ab.c +++ b/82802ab.c @@ -208,3 +208,58 @@ int unlock_28f004s5(struct flashchip *flash) return 0; } + +int unlock_lh28f008bjt(struct flashchip *flash) +{ + chipaddr bios = flash->virtual_memory; + uint8_t mcfg, bcfg; + uint8_t need_unlock = 0, can_unlock = 0; + int i; + + /* Wait if chip is busy */ + wait_82802ab(flash); + + /* Read identifier codes */ + chip_writeb(0x90, bios); + + /* Read master lock-bit */ + mcfg = chip_readb(bios + 0x3); + msg_cdbg("master lock is "); + if (mcfg) { + msg_cdbg("locked!\n"); + } else { + msg_cdbg("unlocked!\n"); + can_unlock = 1; + } + + /* Read block lock-bits, 8 * 8 KB + 15 * 64 KB */ + for (i = 0; i < flash->total_size * 1024; + i += (i >= (64 * 1024) ? 64 * 1024 : 8 * 1024)) { + bcfg = chip_readb(bios + i + 2); /* read block lock config */ + msg_cdbg("block lock at %06x is %slocked!\n", i, + bcfg ? "" : "un"); + if (bcfg) + need_unlock = 1; + } + + /* Reset chip */ + chip_writeb(0xFF, bios); + + /* Unlock: clear block lock-bits, if needed */ + if (can_unlock && need_unlock) { + msg_cdbg("Unlock: "); + chip_writeb(0x60, bios); + chip_writeb(0xD0, bios); + chip_writeb(0xFF, bios); + wait_82802ab(flash); + msg_cdbg("Done!\n"); + } + + /* Error: master locked or a block is locked */ + if (!can_unlock && need_unlock) { + msg_cerr("At least one block is locked and lockdown is active!\n"); + return -1; + } + + return 0; +} -- cgit v1.1