u-boot/drivers/mtd/cfi_mtd.c
Andreas Huber c203ef5db0 UBI/cfi-mtd: Fix mtd name for multiple chips
On platforms with multiple NOR chips, currently only the first one
can be selected using the "ubi part" command. This patch fixes this
problem by using different names for the NOR "mtd devices".

It also changes the name of the NOR MTD device from "cfi-mtd" to
"norX" (X indexing the device numer) to better match the mtdparts
defaults.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Andreas Huber <andreas.huber@keymile.com>
2009-04-04 23:25:40 +02:00

204 lines
4.4 KiB
C

/*
* (C) Copyright 2008 Semihalf
*
* Written by: Piotr Ziecik <kosmo@semihalf.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <common.h>
#include <flash.h>
#include <asm/errno.h>
#include <linux/mtd/mtd.h>
extern flash_info_t flash_info[];
static struct mtd_info cfi_mtd_info[CONFIG_SYS_MAX_FLASH_BANKS];
static char cfi_mtd_names[CONFIG_SYS_MAX_FLASH_BANKS][16];
static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
flash_info_t *fi = mtd->priv;
size_t a_start = fi->start[0] + instr->addr;
size_t a_end = a_start + instr->len;
int s_first = -1;
int s_last = -1;
int error, sect;
for (sect = 0; sect < fi->sector_count - 1; sect++) {
if (a_start == fi->start[sect])
s_first = sect;
if (a_end == fi->start[sect + 1]) {
s_last = sect;
break;
}
}
if (s_first >= 0 && s_first <= s_last) {
instr->state = MTD_ERASING;
flash_set_verbose(0);
error = flash_erase(fi, s_first, s_last);
flash_set_verbose(1);
if (error) {
instr->state = MTD_ERASE_FAILED;
return -EIO;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
return 0;
}
return -EINVAL;
}
static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
flash_info_t *fi = mtd->priv;
u_char *f = (u_char*)(fi->start[0]) + from;
memcpy(buf, f, len);
*retlen = len;
return 0;
}
static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
flash_info_t *fi = mtd->priv;
u_long t = fi->start[0] + to;
int error;
flash_set_verbose(0);
error = write_buff(fi, (u_char*)buf, t, len);
flash_set_verbose(1);
if (!error) {
*retlen = len;
return 0;
}
return -EIO;
}
static void cfi_mtd_sync(struct mtd_info *mtd)
{
/*
* This function should wait until all pending operations
* finish. However this driver is fully synchronous, so
* this function returns immediately
*/
}
static int cfi_mtd_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
flash_info_t *fi = mtd->priv;
flash_set_verbose(0);
flash_protect(FLAG_PROTECT_SET, fi->start[0] + ofs,
fi->start[0] + ofs + len - 1, fi);
flash_set_verbose(1);
return 0;
}
static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
flash_info_t *fi = mtd->priv;
flash_set_verbose(0);
flash_protect(FLAG_PROTECT_CLEAR, fi->start[0] + ofs,
fi->start[0] + ofs + len - 1, fi);
flash_set_verbose(1);
return 0;
}
static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
{
int sect_size = 0;
int sect;
for (sect = 0; sect < fi->sector_count; sect++) {
if (!sect_size) {
sect_size = flash_sector_size(fi, sect);
continue;
}
if (sect_size != flash_sector_size(fi, sect)) {
sect_size = 0;
break;
}
}
if (!sect_size) {
puts("cfi-mtd: devices with multiple sector sizes are"
"not supported\n");
return -EINVAL;
}
mtd->erasesize = sect_size;
return 0;
}
int cfi_mtd_init(void)
{
struct mtd_info *mtd;
flash_info_t *fi;
int error, i;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
fi = &flash_info[i];
mtd = &cfi_mtd_info[i];
memset(mtd, 0, sizeof(struct mtd_info));
error = cfi_mtd_set_erasesize(mtd, fi);
if (error)
continue;
sprintf(cfi_mtd_names[i], "nor%d", i);
mtd->name = cfi_mtd_names[i];
mtd->type = MTD_NORFLASH;
mtd->flags = MTD_CAP_NORFLASH;
mtd->size = fi->size;
mtd->writesize = 1;
mtd->erase = cfi_mtd_erase;
mtd->read = cfi_mtd_read;
mtd->write = cfi_mtd_write;
mtd->sync = cfi_mtd_sync;
mtd->lock = cfi_mtd_lock;
mtd->unlock = cfi_mtd_unlock;
mtd->priv = fi;
if (add_mtd_device(mtd))
return -ENOMEM;
}
return 0;
}