mirror of
https://review.coreboot.org/flashrom.git
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ad3cc55e13
Constify variables where possible. Initialize programmer-related variables explicitly in programmer_init to allow running programmer_init from a clean state after programmer_shutdown. Prohibit registering programmer shutdown functions before init or after shutdown. Kill some dead code. Rename global variables with namespace-polluting names. Use a previously unused locking helper function in sst49lfxxxc.c. This is needed for libflashrom. Effects on the binary size of flashrom are minimal (300 bytes shrinkage), but the data section shrinks by 4384 bytes, and that's a good thing if flashrom is operating in constrained envionments. Corresponding to flashrom svn r1068. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2000 Silicon Integrated System Corporation
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* Copyright (C) 2009 Kontron Modular Computers
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* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Adapted from the Intel FW hub stuff for 82802ax parts. */
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#include "flash.h"
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#include "chipdrivers.h"
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static int check_sst_fwhub_block_lock(struct flashchip *flash, int offset)
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{
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chipaddr registers = flash->virtual_registers;
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uint8_t blockstatus;
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blockstatus = chip_readb(registers + offset + 2);
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msg_cdbg("Lock status for 0x%06x (size 0x%06x) is %02x, ",
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offset, flash->page_size, blockstatus);
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switch (blockstatus & 0x3) {
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case 0x0:
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msg_cdbg("full access\n");
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break;
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case 0x1:
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msg_cdbg("write locked\n");
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break;
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case 0x2:
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msg_cdbg("locked open\n");
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break;
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case 0x3:
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msg_cdbg("write locked down\n");
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break;
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}
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/* Return content of the write_locked bit */
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return blockstatus & 0x1;
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}
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static int clear_sst_fwhub_block_lock(struct flashchip *flash, int offset)
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{
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chipaddr registers = flash->virtual_registers;
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uint8_t blockstatus;
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blockstatus = check_sst_fwhub_block_lock(flash, offset);
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if (blockstatus) {
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msg_cdbg("Trying to clear lock for 0x%06x... ", offset);
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chip_writeb(0, registers + offset + 2);
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blockstatus = check_sst_fwhub_block_lock(flash, offset);
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msg_cdbg("%s\n", (blockstatus) ? "failed" : "OK");
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}
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return blockstatus;
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}
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int printlock_sst_fwhub(struct flashchip *flash)
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{
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int i;
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for (i = 0; i < flash->total_size * 1024; i += flash->page_size)
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check_sst_fwhub_block_lock(flash, i);
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return 0;
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}
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int unlock_sst_fwhub(struct flashchip *flash)
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{
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int i, ret=0;
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for (i = 0; i < flash->total_size * 1024; i += flash->page_size)
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{
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if (clear_sst_fwhub_block_lock(flash, i))
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{
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msg_cdbg("Warning: Unlock Failed for block 0x%06x\n", i);
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ret++;
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}
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}
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return ret;
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}
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