On Fri, 2010-06-18 at 03:19 +0300, Maxim Levitsky wrote:
> Hi,
> This is the patch implementing the detection in clean way.
> Note that I call it smartmedia because xD is direct succesor of
> smartmedia and other that different card package is equivalent to it.
>
ping
> ---
>
>
> commit 2599cabd36770785a13bf884049d649d385fd80c
> Author: Maxim Levitsky <maximlevitsky@xxxxxxxxx>
> 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@xxxxxxxxx>
>
> diff --git a/Makefile.am b/Makefile.am
> index bafe4c7..5e9234a 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -467,6 +467,21 @@ 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
> # ------------------------------------------------------------------------------
> extras_keymap_keymap_SOURCES = extras/keymap/keymap.c
> diff --git a/extras/mtd_probe/75-probe_mtd.rules b/extras/mtd_probe/75-probe_mtd.rules
> new file mode 100644
> index 0000000..1d1b398
> --- /dev/null
> +++ b/extras/mtd_probe/75-probe_mtd.rules
> @@ -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"
> +
> diff --git a/extras/mtd_probe/mtd_probe.c b/extras/mtd_probe/mtd_probe.c
> new file mode 100644
> index 0000000..d335b06
> --- /dev/null
> +++ b/extras/mtd_probe/mtd_probe.c
> @@ -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;
> +}
> diff --git a/extras/mtd_probe/mtd_probe.h b/extras/mtd_probe/mtd_probe.h
> new file mode 100644
> index 0000000..845a7a1
> --- /dev/null
> +++ b/extras/mtd_probe/mtd_probe.h
> @@ -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);
> diff --git a/extras/mtd_probe/probe_smartmedia.c b/extras/mtd_probe/probe_smartmedia.c
> new file mode 100644
> index 0000000..ab6edea
> --- /dev/null
> +++ b/extras/mtd_probe/probe_smartmedia.c
> @@ -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;
> +}
>
>
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