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mtd_probe: add autodetection for xD cards

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commit 2599cabd36770785a13bf884049d649d385fd80c
Author: Maxim Levitsky <maximlevitsky@gmail.com>
Date:   Fri Jun 18 02:08:48 2010 +0300

Add autodetection for xD/smartmedia cards
This can easily be extended for other types of FTL

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
This commit is contained in:
Maxim Levitsky 2010-06-23 22:20:29 +02:00 committed by Kay Sievers
parent e0f83fbe86
commit 674c3412bb
5 changed files with 229 additions and 0 deletions
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15
Makefile.am
View file

@ -466,6 +466,21 @@ dist_udevrules_DATA += \
libexec_PROGRAMS += extras/mobile-action-modeswitch/mobile-action-modeswitch
# ------------------------------------------------------------------------------
# mtd_probe - autoloads FTL module for mtd devices
# ------------------------------------------------------------------------------
extras_mtd_probe_mtd_probe_SOURCES = \
extras/mtd_probe/mtd_probe.c \
extras/mtd_probe/mtd_probe.h \
extras/mtd_probe/probe_smartmedia.c
extras_mtd_probe_mtd_probe_CPPFLAGS = $(AM_CPPFLAGS)
dist_udevrules_DATA += extras/mtd_probe/75-probe_mtd.rules
libexec_PROGRAMS += extras/mtd_probe/mtd_probe
# ------------------------------------------------------------------------------
# keymap - map custom hardware's multimedia keys
# ------------------------------------------------------------------------------

10
extras/mtd_probe/75-probe_mtd.rules Normal file
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@ -0,0 +1,10 @@
#probe mtd devices for FTL
ACTION!="add", GOTO="mtd_probe_end"
KERNEL=="mtd*ro", IMPORT{program}="mtd_probe $tempnode"
KERNEL=="mtd*ro", ENV{MTD_FTL}=="smartmedia", RUN+="/sbin/modprobe sm_ftl"
LABEL="mtd_probe_end"

54
extras/mtd_probe/mtd_probe.c Normal file
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@ -0,0 +1,54 @@
/*
* mtd_probe.c
* This file is part of mtd_probe
*
* Copyright (C) 2010 - Maxim Levitsky
*
* mtd_probe 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.
*
* mtd_probe 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 mtd_probe; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "mtd_probe.h"
#include <stdio.h>
#include <sys/ioctl.h>
#include <mtd/mtd-user.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char** argv) {
if (argc != 2) {
printf("usage: mtd_probe /dev/mtd[n]\n");
return 1;
}
int mtd_fd = open(argv[1], O_RDONLY);
if (mtd_fd == -1) {
perror("open");
exit(-1);
}
mtd_info_t mtd_info;
int error = ioctl(mtd_fd, MEMGETINFO, &mtd_info);
if (error == -1) {
perror("ioctl");
exit(-1);
}
probe_smart_media(mtd_fd, &mtd_info);
return -1;
}

51
extras/mtd_probe/mtd_probe.h Normal file
View file

@ -0,0 +1,51 @@
/*
* mtd_probe.h
* This file is part of mtd_probe
*
* Copyright (C) 2010 - Maxim Levitsky
*
* mtd_probe 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.
*
* mtd_probe 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 mtd_probe; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include <mtd/mtd-user.h>
/* Full oob structure as written on the flash */
struct sm_oob {
uint32_t reserved;
uint8_t data_status;
uint8_t block_status;
uint8_t lba_copy1[2];
uint8_t ecc2[3];
uint8_t lba_copy2[2];
uint8_t ecc1[3];
} __attribute__((packed));
/* one sector is always 512 bytes, but it can consist of two nand pages */
#define SM_SECTOR_SIZE 512
/* oob area is also 16 bytes, but might be from two pages */
#define SM_OOB_SIZE 16
/* This is maximum zone size, and all devices that have more that one zone
have this size */
#define SM_MAX_ZONE_SIZE 1024
/* support for small page nand */
#define SM_SMALL_PAGE 256
#define SM_SMALL_OOB_SIZE 8
void probe_smart_media(int mtd_fd, mtd_info_t *info);

99
extras/mtd_probe/probe_smartmedia.c Normal file
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@ -0,0 +1,99 @@
/*
* probe_smartmedia.c
* This file is part of mtd_probe
*
* Copyright (C) 2010 - Maxim Levitsky
*
* mtd_probe 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.
*
* mtd_probe 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 mtd_probe; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <mtd/mtd-user.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include "mtd_probe.h"
static const uint8_t cis_signature[] = {
0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20
};
void probe_smart_media(int mtd_fd, mtd_info_t* info) {
char* cis_buffer = malloc(SM_SECTOR_SIZE);
if (!cis_buffer)
return;
if (info->type != MTD_NANDFLASH)
goto exit;
int sector_size = info->writesize;
int block_size = info->erasesize;
int size_in_megs = info->size / (1024 * 1024);
int spare_count;
if (sector_size != SM_SECTOR_SIZE && sector_size != SM_SMALL_PAGE)
goto exit;
switch(size_in_megs) {
case 1:
case 2:
spare_count = 6;
break;
case 4:
spare_count = 12;
break;
default:
spare_count = 24;
break;
}
int offset;
int cis_found = 0;
for (offset = 0 ; offset < block_size * spare_count ;
offset += sector_size) {
lseek(mtd_fd, SEEK_SET, offset);
if (read(mtd_fd, cis_buffer, SM_SECTOR_SIZE) == SM_SECTOR_SIZE){
cis_found = 1;
break;
}
}
if (!cis_found)
goto exit;
if (memcmp(cis_buffer, cis_signature, sizeof(cis_signature)) != 0 &&
(memcmp(cis_buffer + SM_SMALL_PAGE, cis_signature,
sizeof(cis_signature)) != 0))
goto exit;
printf("MTD_FTL=smartmedia\n");
free(cis_buffer);
exit(0);
exit:
free(cis_buffer);
return;
}