Remove dead M-Systems Disk on Chip code

DOC support has been disabled by default for many years. The write function
does nothing but print text. It has a call to write_page_md2802() commented
out, but that function does not exist. This is dead code with ugly #ifdefs.

Updates README to reflect that there was a time when there was code, but it
didn't work. Removes M-Systems #defines and also includes svn rm msys_doc.*

Corresponding to flashrom svn r269 and coreboot v2 svn r3382.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Stefan Reinauer <stepan@coresystems.de>

6 files changed, 6 insertions, 365 deletions

diff --git a/Makefile b/Makefile
index 26b3916..f6234f1 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ STRIP	= strip
 INSTALL = /usr/bin/install
 PREFIX  = /usr/local
 #CFLAGS  = -O2 -g -Wall -Werror
-CFLAGS  = -Os -Wall -Werror -DDISABLE_DOC # -DTS5300
+CFLAGS  = -Os -Wall -Werror # -DTS5300
 OS_ARCH	= $(shell uname)
 ifeq ($(OS_ARCH), SunOS)
 LDFLAGS = -lpci -lz
@@ -26,7 +26,7 @@ endif
 
 OBJS = chipset_enable.o board_enable.o udelay.o jedec.o stm50flw0x0x.o \
 	sst28sf040.o am29f040b.o mx29f002.o sst39sf020.o m29f400bt.o \
-	w49f002u.o 82802ab.o msys_doc.o pm49fl00x.o sst49lf040.o \
+	w49f002u.o 82802ab.o pm49fl00x.o sst49lf040.o \
 	sst49lfxxxc.o sst_fwhub.o layout.o cbtable.o flashchips.o \
 	flashrom.o w39v080fa.o sharplhf00l04.o w29ee011.o spi.o it87spi.o \
 	ichspi.o
diff --git a/README b/README
index 7f16715..a3a0143 100644
--- a/README
+++ b/README
@@ -98,8 +98,10 @@ ROM layout and the ROM image in one file (cpio, zip or something?).
 Disk on Chip support
 --------------------
 
-Disk on Chip support is currently disabled since it is considered unstable.
-Change CFLAGS in the Makefile to enable it: Remove -DDISABLE_DOC from CFLAGS.
+Disk on Chip support was removed from flashrom in r3380. It had already
+been disabled by default in flashrom for several years because the code
+was considered unstable and incomplete. The products intended to work
+have been End-Of-Lifed by the manufacturer for a long time.
 
 
 Supported Flash Chips
@@ -113,7 +115,6 @@ Atmel AT-29C020
 EMST F49B002UA
 Intel 82802AB (Firmware Hub) 
 Intel 82802AC (Firmware Hub) 
-M-Systems MD-2802 (unsupported, disabled by default)
 MX MX-29F002
 PMC PMC-49FL002
 PMC PMC-49FL004
diff --git a/flash.h b/flash.h
index 8ed8c92..35d3d8f 100644
--- a/flash.h
+++ b/flash.h
@@ -192,11 +192,6 @@ extern struct flashchip flashchips[];
 
 #define ISSI_ID			0xD5	/* ISSI Integrated Silicon Solutions */
 
-#define MSYSTEMS_ID		0x156F	/* M-Systems, not listed in JEP106W */
-#define MSYSTEMS_MD2200		0xDB
-#define MSYSTEMS_MD2800		0x30	/* hmm -- both 0x30 */
-#define MSYSTEMS_MD2802		0x30	/* hmm -- both 0x30 */
-
 /*
  * MX25 chips are SPI, first byte of device ID is memory type,
  * second byte of device ID is log(bitsize)-9.
diff --git a/flashchips.c b/flashchips.c
index 8a0a477..d688b28 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -21,9 +21,6 @@
  */
 
 #include "flash.h"
-#ifndef DISABLE_DOC
-#include "msys_doc.h"
-#endif
 
 /**
  * List of supported flash ROM chips.
@@ -58,9 +55,6 @@ struct flashchip flashchips[] = {
 	{"Macronix",	"MX25L1605",		MX_ID,		MX_25L1605,		2048,	256,		TEST_UNTESTED,	probe_spi_rdid,		spi_chip_erase_c7,	spi_chip_write,	spi_chip_read},
 	{"Macronix",	"MX25L3205",		MX_ID,		MX_25L3205,		4096,	256,		TEST_OK_PREW,	probe_spi_rdid,		spi_chip_erase_c7,	spi_chip_write,	spi_chip_read},
 	{"Macronix",	"MX29F002",		MX_ID,		MX_29F002,		256,	64 * 1024,	TEST_UNTESTED,	probe_29f002,		erase_29f002,			write_29f002},
-#ifndef DISABLE_DOC
-	{"M-Systems",	"MD-2802",		MSYSTEMS_ID,	MSYSTEMS_MD2802,	8,	8 * 1024,	TEST_UNTESTED,	probe_md2802,		erase_md2802,			write_md2802,		read_md2802},
-#endif
 	{"PMC",		"Pm25LV010",		PMC_ID,		PMC_25LV010,		128,	256,		TEST_UNTESTED,	probe_spi_rdid,		spi_chip_erase_c7,	spi_chip_write,	spi_chip_read},
 	{"PMC",		"Pm25LV016B",		PMC_ID,		PMC_25LV016B,		2048,	256,		TEST_UNTESTED,	probe_spi_rdid,		spi_chip_erase_c7,	spi_chip_write,	spi_chip_read},
 	{"PMC",		"Pm25LV020",		PMC_ID,		PMC_25LV020,		256,	256,		TEST_UNTESTED,	probe_spi_rdid,		spi_chip_erase_c7,	spi_chip_write,	spi_chip_read},
diff --git a/msys_doc.c b/msys_doc.c
deleted file mode 100644
index 1d80f46..0000000
--- a/msys_doc.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * This file is part of the flashrom project.
- *
- * Copyright (C) 2003 Niki W. Waibel <niki.waibel@gmx.net>
- *
- * 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 <stdio.h>
-#include <unistd.h>
-#include "flash.h"
-#include "msys_doc.h"
-
-static int doc_wait(volatile uint8_t *bios, int timeout);
-static uint8_t doc_read_chipid(volatile uint8_t *bios);
-static uint8_t doc_read_docstatus(volatile uint8_t *bios);
-static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios);
-static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data);
-
-int probe_md2802(struct flashchip *flash)
-{
-	volatile uint8_t *bios = flash->virtual_memory;
-	uint8_t chipid;
-#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
-	uint8_t id_0x55, id_0xAA;
-#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
-	int i, toggle_a, toggle_b;
-
-	printf_debug("%s:\n", __FUNCTION__);
-	printf_debug("%s: *******************************\n", __FUNCTION__);
-	printf_debug("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
-	printf_debug("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
-	printf_debug("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
-	printf_debug("%s: *******************************\n", __FUNCTION__);
-	printf_debug("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
-	printf_debug("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
-	printf_debug("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
-	printf_debug("%s: *******************************\n", __FUNCTION__);
-	printf_debug("%s:\n", __FUNCTION__);
-
-	printf_debug("%s: switching off reset mode ...\n", __FUNCTION__);
-	doc_write(0x85, bios, DOCControl);
-	doc_write(0x85, bios, DOCControl);
-	doc_read_4nop(bios);
-	if (doc_wait(bios, 5000))
-		return (-1);
-	printf("%s: switching off reset mode ... done\n", __FUNCTION__);
-	printf("%s:\n", __FUNCTION__);
-
-	printf("%s: switching off write protection ...\n", __FUNCTION__);
-	doc_write_cdsncontrol(bios, doc_read_cdsncontrol(bios) & (~0x08));
-	printf("%s: switching off write protection ... done\n", __FUNCTION__);
-	printf("%s:\n", __FUNCTION__);
-
-	chipid = doc_read_chipid(bios);
-#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
-	id_0x55 = doc_read(bios, IPL_0x0000);
-	id_0xAA = doc_read(bios, IPL_0x0001);
-#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
-	printf("%s: IPL_0x0000: 0x%02x\n", __FUNCTION__, id_0x55);
-	printf("%s: IPL_0x0001: 0x%02x\n", __FUNCTION__, id_0xAA);
-	printf("%s: IPL_0x0002: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, IPL_0x0002));
-	printf("%s: IPL_0x0003: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, IPL_0x0003));
-	printf("%s:\n", __FUNCTION__);
-	printf("%s: ChipID: 0x%02x\n", __FUNCTION__, chipid);
-	printf("%s: DOCStatus: 0x%02x\n", __FUNCTION__,
-	       doc_read_docstatus(bios));
-	printf("%s: FloorSelect: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, FloorSelect));
-	printf("%s: CDSNControl: 0x%02x\n", __FUNCTION__,
-	       doc_read_cdsncontrol(bios));
-	printf("%s: CDSNDeviceSelect: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, CDSNDeviceSelect));
-	printf("%s: ECCConfiguration: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCConfiguration));
-	printf("%s: CDSNSlowIO: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, CDSNSlowIO));
-	printf("%s: ECCSyndrome0: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome0));
-	printf("%s: ECCSyndrome1: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome1));
-	printf("%s: ECCSyndrome2: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome2));
-	printf("%s: ECCSyndrome3: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome3));
-	printf("%s: ECCSyndrome4: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome4));
-	printf("%s: ECCSyndrome5: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ECCSyndrome5));
-	printf("%s: AliasResolution: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, AliasResolution));
-	printf("%s: ConfigurationInput: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ConfigurationInput));
-	printf("%s: ReadPipelineInitialization: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, ReadPipelineInitialization));
-	printf("%s: LastDataRead: 0x%02x\n", __FUNCTION__,
-	       doc_read(bios, LastDataRead));
-	printf("%s:\n", __FUNCTION__);
-
-	printf("%s: checking ECCConfiguration toggle bit\n", __FUNCTION__);
-	printf("%s:", __FUNCTION__);
-	toggle_a = toggle_b = 0;
-	for (i = 0; i < 10; i++) {
-		uint8_t toggle = doc_toggle(bios);
-
-		printf(" 0x%02x", toggle);
-
-		if (i % 2)
-			toggle_a += toggle;
-		else
-			toggle_b += toggle;
-	}			/* for(i=0; i<10; i++) */
-	printf("\n%s: toggle result: %d/%d\n", __FUNCTION__, toggle_a,
-	       toggle_b);
-
-	if (chipid == flash->model_id && ((toggle_a == 5 && toggle_b == 0)
-					  || (toggle_a == 0 && toggle_b == 5))
-#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
-	    && id_0x55 == 0x55 && id_0xAA == 0xaa
-#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
-	    ) {
-		return 1;
-	}
-
-	return 0;
-}
-
-int read_md2802(struct flashchip *flash, uint8_t *buf)
-{
-	return 0;
-}
-
-int erase_md2802(struct flashchip *flash)
-{
-	volatile uint8_t *bios = flash->virtual_memory;
-
-	return 1;
-
-	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
-	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
-	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
-
-	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
-	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
-	*(volatile uint8_t *)(bios + 0x5555) = 0x10;
-}
-
-int write_md2802(struct flashchip *flash, uint8_t *buf)
-{
-	int i;
-	int total_size = flash->total_size * 1024;
-	int page_size = flash->page_size;
-	volatile uint8_t *bios = flash->virtual_memory;
-
-	return (1);
-	erase_md2802(flash);
-	if (*bios != (uint8_t) 0xff) {
-		printf("ERASE FAILED!\n");
-		return -1;
-	}
-	printf("Programming page: ");
-	for (i = 0; i < total_size / page_size; i++) {
-		printf("%04d at address: 0x%08x", i, i * page_size);
-		//write_page_md2802(bios, buf + i * page_size, bios + i * page_size, page_size);
-		printf
-		    ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
-	}
-	printf("\n");
-	//protect_md2802(bios);
-
-	return 0;
-}				/* int write_md2802(struct flashchip *flash, uint8_t *buf) */
-
-/*
-	wait timeout msec for doc to become ready
-	return:
-		0: ready
-		-1: timeout expired
-*/
-
-static int doc_wait(volatile uint8_t *bios, int timeout)
-{
-	int i = 20;
-
-	doc_read_4nop(bios);
-
-	while (_doc_busy(bios) && (i != 0)) {
-		usleep(timeout * 1000 / 20);
-		i--;
-	}
-
-	doc_read_2nop(bios);
-
-	if (_doc_busy(bios)) {
-		doc_read_2nop(bios);
-		return (-1);
-	}
-
-	return 0;
-}
-
-static uint8_t doc_read_docstatus(volatile uint8_t *bios)
-{
-	doc_read(bios, CDSNSlowIO);
-	doc_read_2nop(bios);
-
-	return (doc_read(bios, _DOCStatus));
-}
-
-static uint8_t doc_read_chipid(volatile uint8_t *bios)
-{
-	doc_read(bios, CDSNSlowIO);
-	doc_read_2nop(bios);
-
-	return (doc_read(bios, _ChipID));
-}
-
-static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios)
-{
-	uint8_t value;
-
-	/* the delays might be necessary when reading the busy bit,
-	   but because a read to this reg reads the busy bit
-	   anyway we better do this delays... */
-	doc_read_4nop(bios);
-	value = doc_read(bios, _CDSNControl);
-	doc_read_2nop(bios);
-
-	return value;
-}
-
-static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data)
-{
-	doc_write(data, bios, _CDSNControl);
-	doc_read_4nop(bios);
-}
diff --git a/msys_doc.h b/msys_doc.h
deleted file mode 100644
index 13915c9..0000000
--- a/msys_doc.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * This file is part of the flashrom project.
- *
- * Copyright (C) 2003 Niki W. Waibel <niki.waibel@gmx.net>
- *
- * 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
- */
-
-#ifndef __MSYS_DOC_H__
-#define __MSYS_DOC_H__ 1
-
-/* idea from include/linux/mtd/doc2000.h */
-/* registers with __ should not be read/written directly */
-#define MSYSTEMS_DOC_R__ChipID                    0x1000
-#define MSYSTEMS_DOC_R__DOCStatus                 0x1001
-#define MSYSTEMS_DOC_W_DOCControl                 0x1002
-#define MSYSTEMS_DOC_R_FloorSelect                0x1003
-#define MSYSTEMS_DOC_W_FloorSelect                0x1003
-#define MSYSTEMS_DOC_R__CDSNControl               0x1004
-#define MSYSTEMS_DOC_W__CDSNControl               0x1004
-#define MSYSTEMS_DOC_R_CDSNDeviceSelect           0x1005
-#define MSYSTEMS_DOC_W_CDSNDeviceSelect           0x1005
-#define MSYSTEMS_DOC_R_ECCConfiguration           0x1006
-#define MSYSTEMS_DOC_W_ECCConfiguration           0x1006
-#define MSYSTEMS_DOC_R_CDSNSlowIO                 0x100d
-#define MSYSTEMS_DOC_W_CDSNSlowIO                 0x100d
-#define MSYSTEMS_DOC_R_ECCSyndrome0               0x1010
-#define MSYSTEMS_DOC_R_ECCSyndrome1               0x1011
-#define MSYSTEMS_DOC_R_ECCSyndrome2               0x1012
-#define MSYSTEMS_DOC_R_ECCSyndrome3               0x1013
-#define MSYSTEMS_DOC_R_ECCSyndrome4               0x1014
-#define MSYSTEMS_DOC_R_ECCSyndrome5               0x1015
-#define MSYSTEMS_DOC_R_AliasResolution            0x101b
-#define MSYSTEMS_DOC_W_AliasResolution            0x101b
-#define MSYSTEMS_DOC_R_ConfigurationInput         0x101c
-#define MSYSTEMS_DOC_W_ConfigurationInput         0x101c
-#define MSYSTEMS_DOC_R_ReadPipelineInitialization 0x101d
-#define MSYSTEMS_DOC_W_WritePipelineTermination   0x101e
-#define MSYSTEMS_DOC_R_LastDataRead               0x101f
-#define MSYSTEMS_DOC_W_LastDataRead               0x101f
-#define MSYSTEMS_DOC_R_NOP                        0x1020
-#define MSYSTEMS_DOC_W_NOP                        0x1020
-
-#define MSYSTEMS_DOC_R_IPL_0x0000                 0x0000
-#define MSYSTEMS_DOC_R_IPL_0x0001                 0x0001
-#define MSYSTEMS_DOC_R_IPL_0x0002                 0x0002
-#define MSYSTEMS_DOC_R_IPL_0x0003                 0x0003
-
-#define MSYSTEMS_DOC_R_CDSNIO_BASE                0x0800
-#define MSYSTEMS_DOC_W_CDSNIO_BASE                0x0800
-
-#define doc_read(base,reg) \
-	(*(volatile uint8_t *)(base + MSYSTEMS_DOC_R_##reg))
-
-#define doc_read_nop(base) \
-	doc_read(base, NOP)
-
-#define doc_read_2nop(base) \
-	{ doc_read_nop(base); doc_read_nop(base); }
-
-#define doc_read_4nop(base) \
-	{ doc_read_2nop(base); doc_read_2nop(base); }
-
-#define doc_write(data,base,reg) \
-	(*(volatile uint8_t *)(base + MSYSTEMS_DOC_W_##reg)) = data
-
-#define doc_write_nop(base) \
-	doc_write(0, base, NOP)
-
-#define doc_write_2nop(base) \
-	{ doc_write_nop(base); doc_write_nop(base); }
-
-#define doc_write_4nop(base) \
-	{ doc_write_2nop(base); doc_write_2nop(base); }
-
-#define _doc_busy(base)   /* 0: ready; -1: busy */ \
-	( ((doc_read(base, _CDSNControl) & 0x80) >> 7) - 1)
-
-#define doc_toggle(base)   /* 0, 1, 0, 1, 0, 1, ... if a doc is present */ \
-	( (doc_read(base, ECCConfiguration) & 0x04) >> 2 )
-
-int probe_md2802(struct flashchip *flash);
-int read_md2802(struct flashchip *flash, uint8_t *buf);
-int erase_md2802(struct flashchip *flash);
-int write_md2802(struct flashchip *flash, uint8_t *buf);
-
-#endif				/* !__MSYS_DOC_H__ */