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/*
* msys_doc.c: driver for programming m-systems doc devices
*
*
* Copyright 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <unistd.h>
#include "flash.h"
#include "msys_doc.h"
static int doc_wait(volatile char *bios, int timeout);
static unsigned char doc_read_chipid(volatile char *bios);
static unsigned char doc_read_docstatus(volatile char *bios);
static unsigned char doc_read_cdsncontrol(volatile char *bios);
static void doc_write_cdsncontrol(volatile char *bios, unsigned char data);
int probe_md2802(struct flashchip *flash)
{
volatile char *bios = flash->virt_addr;
unsigned char chipid;
#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
unsigned char id_0x55, id_0xAA;
#endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
int i, toggle_a, toggle_b;
printf("%s:\n", __FUNCTION__);
printf("%s: *******************************\n", __FUNCTION__);
printf("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
printf("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
printf("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
printf("%s: *******************************\n", __FUNCTION__);
printf("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
printf("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
printf("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
printf("%s: *******************************\n", __FUNCTION__);
printf("%s:\n", __FUNCTION__);
printf("%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++) {
unsigned char 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 probe_md2802(struct flashchip *flash) */
int read_md2802(struct flashchip *flash, unsigned char *buf)
{
return (0);
} /* int read_md2802(struct flashchip *flash, unsigned char *buf) */
int erase_md2802(struct flashchip *flash)
{
volatile char *bios = flash->virt_addr;
return (1);
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0x80;
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0x10;
} /* int erase_md2802(struct flashchip *flash) */
int write_md2802(struct flashchip *flash, unsigned char *buf)
{
int i;
int total_size = flash->total_size * 1024, page_size =
flash->page_size;
volatile unsigned char *bios = flash->virt_addr;
return (1);
erase_md2802(flash);
if (*bios != (unsigned char) 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, char *buf) */
/*
wait timeout msec for doc to become ready
return:
0: ready
-1: timeout expired
*/
static int doc_wait(volatile char *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 int doc_wait(volatile char *bios, int timeout) */
static unsigned char doc_read_docstatus(volatile char *bios)
{
doc_read(bios, CDSNSlowIO);
doc_read_2nop(bios);
return (doc_read(bios, _DOCStatus));
} /* static unsigned char doc_read_docstatus(volatile char *bios) */
static unsigned char doc_read_chipid(volatile char *bios)
{
doc_read(bios, CDSNSlowIO);
doc_read_2nop(bios);
return (doc_read(bios, _ChipID));
} /* static unsigned char doc_read_chipid(volatile char *bios) */
static unsigned char doc_read_cdsncontrol(volatile char *bios)
{
unsigned char 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 unsigned char doc_read_chipid(volatile char *bios) */
static void doc_write_cdsncontrol(volatile char *bios, unsigned char data)
{
doc_write(data, bios, _CDSNControl);
doc_read_4nop(bios);
} /* static void doc_write_chipid(volatile char *bios, unsigned char data) */
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