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authorCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2014-08-08 08:33:01 +0000
committerStefan Tauner <stefan.tauner@alumni.tuwien.ac.at>2014-08-08 08:33:01 +0000
commita8cf3620a42ca5927253822a813e3fbae1d6e7bf (patch)
tree64ff1e62b06ee89492c914e11c86b54ddf126b0c /m29f400bt.c
parent6697f71ade7b6428c7be6051c02dbb9768900e04 (diff)
downloadast2050-flashrom-a8cf3620a42ca5927253822a813e3fbae1d6e7bf.zip
ast2050-flashrom-a8cf3620a42ca5927253822a813e3fbae1d6e7bf.tar.gz
Unify non-shifted and shifted JEDEC access
Some Parallel bus chips have a 16-bit mode and an 8-bit mode. They use normal JEDEC addresses for 16-bit mode and shifted addresses (by 1 bit) for 8-bit mode. Some programmers can access them in 16-bit mode, but on all flashrom-supported programmers so far, we access them in 8-bit mode. This means we have to shift the addresses but apart from the addresses we can share the code. This patch makes this possible by checking the chip's FEATURE_ADDR_SHIFTED flag in common JEDEC functions and applying the right addresses respectively. Corresponding to flashrom svn r1840. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Diffstat (limited to 'm29f400bt.c')
-rw-r--r--m29f400bt.c87
1 files changed, 0 insertions, 87 deletions
diff --git a/m29f400bt.c b/m29f400bt.c
deleted file mode 100644
index 399a7e0..0000000
--- a/m29f400bt.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * This file is part of the flashrom project.
- *
- * Copyright (C) 2000 Silicon Integrated System Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "flash.h"
-#include "chipdrivers.h"
-
-/* WARNING!
- This chip uses the standard JEDEC Addresses in 16-bit mode as word
- addresses. In byte mode, 0xAAA has to be used instead of 0x555 and
- 0x555 instead of 0x2AA. Do *not* blindly replace with standard JEDEC
- functions. */
-
-/* chunksize is 1 */
-int write_m29f400bt(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int len)
-{
- int i;
- chipaddr bios = flash->virtual_memory;
- chipaddr dst = flash->virtual_memory + start;
-
- for (i = 0; i < len; i++) {
- chip_writeb(flash, 0xAA, bios + 0xAAA);
- chip_writeb(flash, 0x55, bios + 0x555);
- chip_writeb(flash, 0xA0, bios + 0xAAA);
-
- /* transfer data from source to destination */
- chip_writeb(flash, *src, dst);
- toggle_ready_jedec(flash, dst);
-#if 0
- /* We only want to print something in the error case. */
- msg_cerr("Value in the flash at address 0x%lx = %#x, want %#x\n",
- (dst - bios), chip_readb(flash, dst), *src);
-#endif
- dst++;
- src++;
- }
-
- /* FIXME: Ignore errors for now. */
- return 0;
-}
-
-int probe_m29f400bt(struct flashctx *flash)
-{
- chipaddr bios = flash->virtual_memory;
- uint8_t id1, id2;
-
- chip_writeb(flash, 0xAA, bios + 0xAAA);
- chip_writeb(flash, 0x55, bios + 0x555);
- chip_writeb(flash, 0x90, bios + 0xAAA);
-
- programmer_delay(10);
-
- id1 = chip_readb(flash, bios);
- /* The data sheet says id2 is at (bios + 0x01) and id2 listed in
- * flash.h does not match. It should be possible to use JEDEC probe.
- */
- id2 = chip_readb(flash, bios + 0x02);
-
- chip_writeb(flash, 0xAA, bios + 0xAAA);
- chip_writeb(flash, 0x55, bios + 0x555);
- chip_writeb(flash, 0xF0, bios + 0xAAA);
-
- programmer_delay(10);
-
- msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
-
- if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id)
- return 1;
-
- return 0;
-}
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