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/*
* dfu_nand.c -- DFU for NAND routines.
*
* Copyright (C) 2012-2013 Texas Instruments, Inc.
*
* Based on dfu_mmc.c which is:
* Copyright (C) 2012 Samsung Electronics
* author: Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <errno.h>
#include <div64.h>
#include <dfu.h>
#include <linux/mtd/mtd.h>
#include <jffs2/load_kernel.h>
#include <nand.h>
enum dfu_nand_op {
DFU_OP_READ = 1,
DFU_OP_WRITE,
};
static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
loff_t start, lim;
size_t count, actual;
int ret;
nand_info_t *nand;
/* if buf == NULL return total size of the area */
if (buf == NULL) {
*len = dfu->data.nand.size;
return 0;
}
start = dfu->data.nand.start + offset + dfu->bad_skip;
lim = dfu->data.nand.start + dfu->data.nand.size - start;
count = *len;
if (nand_curr_device < 0 ||
nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
printf("%s: invalid nand device\n", __func__);
return -1;
}
nand = &nand_info[nand_curr_device];
if (op == DFU_OP_READ) {
ret = nand_read_skip_bad(nand, start, &count, &actual,
lim, buf);
} else {
nand_erase_options_t opts;
memset(&opts, 0, sizeof(opts));
opts.offset = start;
opts.length = count;
opts.spread = 1;
opts.quiet = 1;
opts.lim = lim;
/* first erase */
ret = nand_erase_opts(nand, &opts);
if (ret)
return ret;
/* then write */
ret = nand_write_skip_bad(nand, start, &count, &actual,
lim, buf, 0);
}
if (ret != 0) {
printf("%s: nand_%s_skip_bad call failed at %llx!\n",
__func__, op == DFU_OP_READ ? "read" : "write",
start);
return ret;
}
/*
* Find out where we stopped writing data. This can be deeper into
* the NAND than we expected due to having to skip bad blocks. So
* we must take this into account for the next write, if any.
*/
if (actual > count)
dfu->bad_skip += actual - count;
return ret;
}
static inline int nand_block_write(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
}
static inline int nand_block_read(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
}
static int dfu_write_medium_nand(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = nand_block_write(dfu, offset, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = nand_block_read(dfu, offset, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s)
{
char *st;
int ret, dev, part;
dfu->dev_type = DFU_DEV_NAND;
st = strsep(&s, " ");
if (!strcmp(st, "raw")) {
dfu->layout = DFU_RAW_ADDR;
dfu->data.nand.start = simple_strtoul(s, &s, 16);
s++;
dfu->data.nand.size = simple_strtoul(s, &s, 16);
} else if (!strcmp(st, "part")) {
char mtd_id[32];
struct mtd_device *mtd_dev;
u8 part_num;
struct part_info *pi;
dfu->layout = DFU_RAW_ADDR;
dev = simple_strtoul(s, &s, 10);
s++;
part = simple_strtoul(s, &s, 10);
sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
printf("using id '%s'\n", mtd_id);
mtdparts_init();
ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
if (ret != 0) {
printf("Could not locate '%s'\n", mtd_id);
return -1;
}
dfu->data.nand.start = pi->offset;
dfu->data.nand.size = pi->size;
} else {
printf("%s: Memory layout (%s) not supported!\n", __func__, st);
return -1;
}
dfu->read_medium = dfu_read_medium_nand;
dfu->write_medium = dfu_write_medium_nand;
/* initial state */
dfu->inited = 0;
return 0;
}
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