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https://review.coreboot.org/flashrom.git
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Add support for the Eon EN29LV640B chip
This chip needs special command sequences in 8 bit mode. Also, 8 bit programming needs actually 16bit double byte program. The chip is found on the Bifferos Bifferboard, for example. Corresponding to flashrom svn r1521. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
This commit is contained in:
Rudolf Marek
Uwe Hermann
parent
1525b2ad16
commit
47eff6b5b4
2
Makefile
2
Makefile
@ -261,7 +261,7 @@ endif
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CHIP_OBJS = jedec.o stm50flw0x0x.o w39.o w29ee011.o \
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sst28sf040.o m29f400bt.o 82802ab.o pm49fl00x.o \
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sst49lfxxxc.o sst_fwhub.o flashchips.o spi.o spi25.o sharplhf00l04.o \
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a25.o at25.o opaque.o sfdp.o
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a25.o at25.o opaque.o sfdp.o en29lv640b.o
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LIB_OBJS = layout.o
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@ -157,4 +157,10 @@ int probe_w29ee011(struct flashctx *flash);
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int erase_sector_stm50flw0x0x(struct flashctx *flash, unsigned int block, unsigned int blocksize);
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int unlock_stm50flw0x0x(struct flashctx *flash);
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/* en29lv640b.c */
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int probe_en29lv640b(struct flashctx *flash);
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int block_erase_en29lv640b(struct flashctx *flash, unsigned int start, unsigned int len);
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int block_erase_chip_en29lv640b(struct flashctx *flash, unsigned int start, unsigned int len);
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int write_en29lv640b(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
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#endif /* !__CHIPDRIVERS_H__ */
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138
en29lv640b.c
Normal file
138
en29lv640b.c
Normal file
@ -0,0 +1,138 @@
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/*
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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) 2012 Rudolf Marek <r.marek@assembler.cz>
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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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#include "flash.h"
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#include "chipdrivers.h"
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/*
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* WARNING!
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* This chip uses the standard JEDEC addresses in 16-bit mode as word
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* addresses. In byte mode, 0xAAA has to be used instead of 0x555 and
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* 0x555 instead of 0x2AA. Do *not* blindly replace with standard JEDEC
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* functions.
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*/
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/* chunksize is 1 */
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int write_en29lv640b(struct flashctx *flash, uint8_t *src, unsigned int start,
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unsigned int len)
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{
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int i;
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = flash->virtual_memory + start;
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for (i = 0; i < len; i += 2) {
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0xA0, bios + 0xAAA);
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/* Transfer data from source to destination. */
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chip_writew(flash, (*src) | ((*(src + 1)) << 8 ), dst);
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toggle_ready_jedec(flash, dst);
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#if 0
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/* We only want to print something in the error case. */
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msg_cerr("Value in the flash at address 0x%lx = %#x, want %#x\n",
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(dst - bios), chip_readb(flash, dst), *src);
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#endif
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dst += 2;
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src += 2;
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}
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/* FIXME: Ignore errors for now. */
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return 0;
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}
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int probe_en29lv640b(struct flashctx *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint16_t id1, id2;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x90, bios + 0xAAA);
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programmer_delay(10);
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id1 = chip_readb(flash, bios + 0x200);
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id1 |= (chip_readb(flash, bios) << 8);
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id2 = chip_readb(flash, bios + 0x02);
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chip_writeb(flash, 0xF0, bios + 0xAAA);
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programmer_delay(10);
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msg_cdbg("%s: id1 0x%04x, id2 0x%04x\n", __func__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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return 1;
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return 0;
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}
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int erase_en29lv640b(struct flashctx *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x80, bios + 0xAAA);
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x10, bios + 0xAAA);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_en29lv640b(struct flashctx *flash, unsigned int start,
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unsigned int len)
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{
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = bios + start;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x80, bios + 0xAAA);
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x30, dst);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_chip_en29lv640b(struct flashctx *flash, unsigned int address,
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unsigned int blocklen)
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{
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if ((address != 0) || (blocklen != flash->total_size * 1024)) {
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msg_cerr("%s called with incorrect arguments\n", __func__);
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return -1;
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}
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return erase_en29lv640b(flash);
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}
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34
flashchips.c
34
flashchips.c
@ -3530,7 +3530,7 @@ const struct flashchip flashchips[] = {
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.block_erasers =
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{
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{
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.eraseblocks = {
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.eraseblocks = {
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{16 * 1024, 1},
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{8 * 1024, 2},
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{32 * 1024, 1},
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@ -3562,7 +3562,7 @@ const struct flashchip flashchips[] = {
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.block_erasers =
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{
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{
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.eraseblocks = {
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.eraseblocks = {
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{64 * 1024, 3},
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{32 * 1024, 1},
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{8 * 1024, 2},
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@ -3579,6 +3579,36 @@ const struct flashchip flashchips[] = {
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.voltage = {4500, 5500},
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},
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{
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.vendor = "Eon",
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.name = "EN29LV640B",
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.bustype = BUS_PARALLEL,
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.manufacture_id = EON_ID,
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.model_id = EON_EN29LV640B,
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.total_size = 8192,
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.page_size = 8192,
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.feature_bits = 0,
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.tested = TEST_OK_PREW,
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.probe = probe_en29lv640b,
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.probe_timing = TIMING_ZERO, /* Datasheet has no timing info specified */
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.block_erasers =
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{
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{
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.eraseblocks = {
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{8 * 1024, 8},
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{64 * 1024, 127},
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},
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.block_erase = block_erase_en29lv640b,
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}, {
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.eraseblocks = { {8 * 1024 * 1024, 1} },
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.block_erase = block_erase_chip_en29lv640b,
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},
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},
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.write = write_en29lv640b,
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.read = read_memmapped,
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.voltage = {2700, 3600},
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},
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{
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.vendor = "Fujitsu",
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.name = "MBM29F004BC",
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@ -256,6 +256,7 @@
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#define EON_EN29F040A 0x7F04
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#define EON_EN29LV010 0x7F6E
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#define EON_EN29LV040A 0x7F4F /* EN29LV040(A) */
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#define EON_EN29LV640B 0xCB
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#define EON_EN29F002T 0x7F92 /* Same as EN29F002A */
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#define EON_EN29F002B 0x7F97 /* Same as EN29F002AN */
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