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/*
* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* 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 version 2
* as published by the Free Software Foundation.
*
* 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 <command.h>
#include <fs.h>
#include <linux/stat.h>
#include <errno.h>
#include <malloc.h>
#include <getopt.h>
#include <xfuncs.h>
#include <init.h>
#include <ioctl.h>
#include <nand.h>
#include <linux/mtd/mtd-abi.h>
struct nand_bb {
struct device_d device;
struct device_d *physdev;
int open;
struct mtd_info_user info;
off_t offset;
};
static ssize_t nand_bb_read(struct device_d *dev, void *buf, size_t count,
unsigned long offset, ulong flags)
{
struct nand_bb *bb = dev->priv;
int ret;
debug("%s %d %d\n", __func__, offset, count);
do {
ret = dev_ioctl(bb->physdev, MEMGETBADBLOCK, (void *)bb->offset);
if (ret < 0)
return ret;
if (ret) {
printf("skipping bad block at 0x%08x\n", bb->offset);
bb->offset += bb->info.erasesize;
}
} while (ret);
ret = dev_read(bb->physdev, buf, count, bb->offset, flags);
if (ret > 0)
bb->offset += ret;
return ret;
}
static ssize_t nand_bb_write(struct device_d *dev, const void *buf, size_t count,
unsigned long offset, ulong flags)
{
struct nand_bb *bb = dev->priv;
int ret;
debug("%s %d %d\n", __func__, offset, count);
do {
ret = dev_ioctl(bb->physdev, MEMGETBADBLOCK, (void *)bb->offset);
if (ret < 0)
return ret;
if (ret) {
printf("skipping bad block at 0x%08x\n", bb->offset);
bb->offset += bb->info.erasesize;
}
} while (ret);
ret = dev_write(bb->physdev, buf, count, bb->offset, flags);
if (ret > 0)
bb->offset += ret;
return ret;
}
static int nand_bb_open(struct device_d *dev, struct filep *f)
{
struct nand_bb *bb = dev->priv;
if (bb->open)
return -EBUSY;
bb->open = 1;
bb->offset = 0;
return 0;
}
static int nand_bb_close(struct device_d *dev, struct filep *f)
{
struct nand_bb *bb = dev->priv;
bb->open = 0;
return 0;
}
static int nand_bb_probe(struct device_d *dev)
{
struct nand_bb *bb = dev->priv;
int ret = 0;
ret = dev_ioctl(bb->physdev, MEMGETINFO, &bb->info);
if (ret < 0)
goto out;
return 0;
out:
free(bb);
return ret;
}
static int nand_bb_remove(struct device_d *dev)
{
return 0;
}
struct driver_d nand_bb_driver = {
.name = "nand_bb",
.probe = nand_bb_probe,
.remove = nand_bb_remove,
.open = nand_bb_open,
.close = nand_bb_close,
.read = nand_bb_read,
.write = nand_bb_write,
.type = DEVICE_TYPE_NAND_BB,
};
static int nand_bb_init(void)
{
return register_driver(&nand_bb_driver);
}
device_initcall(nand_bb_init);
static int do_nand (cmd_tbl_t *cmdtp, int argc, char *argv[])
{
int opt;
char *add_device = NULL, *del_device = NULL;
struct device_d *dev;
struct nand_bb *bb;
getopt_reset();
while((opt = getopt(argc, argv, "a:d:")) > 0) {
switch(opt) {
case 'a':
add_device = optarg;
break;
case 'd':
del_device = optarg;
break;
}
}
if (add_device) {
dev = get_device_by_path(add_device);
if (!dev) {
printf("no such device: %s\n", add_device);
return 1;
}
if (dev->type != DEVICE_TYPE_NAND) {
printf("not a nand device: %s\n", add_device);
return 1;
}
bb = xzalloc(sizeof(*bb));
sprintf(bb->device.id, "%s.bb", dev->id);
strcpy(bb->device.name, "nand_bb");
bb->device.priv = bb;
bb->device.size = dev->size; /* FIXME: Bad blocks? */
bb->device.type = DEVICE_TYPE_NAND_BB;
bb->physdev = dev;
if (register_device(&bb->device))
goto free_out;
dev_add_child(dev, &bb->device);
}
if (del_device) {
dev = get_device_by_path(del_device);
if (!dev) {
printf("no such device: %s\n", del_device);
return 1;
}
if (dev->type != DEVICE_TYPE_NAND_BB) {
printf("not a nand bb device: %s\n", dev);
return 1;
}
bb = dev->priv;
unregister_device(dev);
free(bb);
}
free_out:
return 0;
}
static const __maybe_unused char cmd_nand_help[] =
"Usage: nand [OPTION]...\n"
"nand related commands\n"
" -a <dev> register a bad block aware device ontop of a normal nand device\n"
" -d <dev> deregister a bad block aware device\n";
U_BOOT_CMD_START(nand)
.maxargs = CONFIG_MAXARGS,
.cmd = do_nand,
.usage = "",
U_BOOT_CMD_HELP(cmd_nand_help)
U_BOOT_CMD_END
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