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/*
* dfu.c -- DFU back-end routines
*
* Copyright (C) 2012 Samsung Electronics
* author: Lukasz Majewski <l.majewski@samsung.com>
*
* 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 <malloc.h>
#include <errno.h>
#include <div64.h>
#include <dfu.h>
enum dfu_mmc_op {
DFU_OP_READ = 1,
DFU_OP_WRITE,
};
static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
dfu_file_buf[CONFIG_SYS_DFU_MAX_FILE_SIZE];
static long dfu_file_buf_len;
static int mmc_block_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
char cmd_buf[DFU_CMD_BUF_SIZE];
u32 blk_start, blk_count;
/*
* We must ensure that we work in lba_blk_size chunks, so ALIGN
* this value.
*/
*len = ALIGN(*len, dfu->data.mmc.lba_blk_size);
blk_start = dfu->data.mmc.lba_start +
(u32)lldiv(offset, dfu->data.mmc.lba_blk_size);
blk_count = *len / dfu->data.mmc.lba_blk_size;
if (blk_start + blk_count >
dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) {
puts("Request would exceed designated area!\n");
return -EINVAL;
}
sprintf(cmd_buf, "mmc %s %p %x %x",
op == DFU_OP_READ ? "read" : "write",
buf, blk_start, blk_count);
debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
return run_command(cmd_buf, 0);
}
static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len)
{
if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
dfu_file_buf_len = 0;
return -EINVAL;
}
/* Add to the current buffer. */
memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
dfu_file_buf_len += *len;
return 0;
}
static int mmc_file_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
void *buf, long *len)
{
char cmd_buf[DFU_CMD_BUF_SIZE];
char *str_env;
int ret;
switch (dfu->layout) {
case DFU_FS_FAT:
sprintf(cmd_buf, "fat%s mmc %d:%d 0x%x %s",
op == DFU_OP_READ ? "load" : "write",
dfu->data.mmc.dev, dfu->data.mmc.part,
(unsigned int) buf, dfu->name);
if (op == DFU_OP_WRITE)
sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len);
break;
case DFU_FS_EXT4:
sprintf(cmd_buf, "ext4%s mmc %d:%d 0x%x /%s",
op == DFU_OP_READ ? "load" : "write",
dfu->data.mmc.dev, dfu->data.mmc.part,
(unsigned int) buf, dfu->name);
if (op == DFU_OP_WRITE)
sprintf(cmd_buf + strlen(cmd_buf), " %ld", *len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
return -1;
}
debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
ret = run_command(cmd_buf, 0);
if (ret) {
puts("dfu: Read error!\n");
return ret;
}
if (dfu->layout != DFU_RAW_ADDR && op == DFU_OP_READ) {
str_env = getenv("filesize");
if (str_env == NULL) {
puts("dfu: Wrong file size!\n");
return -1;
}
*len = simple_strtoul(str_env, NULL, 16);
}
return ret;
}
int dfu_write_medium_mmc(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
break;
case DFU_FS_FAT:
case DFU_FS_EXT4:
ret = mmc_file_buffer(dfu, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
int dfu_flush_medium_mmc(struct dfu_entity *dfu)
{
int ret = 0;
if (dfu->layout != DFU_RAW_ADDR) {
/* Do stuff here. */
ret = mmc_file_op(DFU_OP_WRITE, dfu, &dfu_file_buf,
&dfu_file_buf_len);
/* Now that we're done */
dfu_file_buf_len = 0;
}
return ret;
}
int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
break;
case DFU_FS_FAT:
case DFU_FS_EXT4:
ret = mmc_file_op(DFU_OP_READ, dfu, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s)
{
int dev, part;
struct mmc *mmc;
block_dev_desc_t *blk_dev;
disk_partition_t partinfo;
char *st;
dfu->dev_type = DFU_DEV_MMC;
st = strsep(&s, " ");
if (!strcmp(st, "mmc")) {
dfu->layout = DFU_RAW_ADDR;
dfu->data.mmc.lba_start = simple_strtoul(s, &s, 16);
dfu->data.mmc.lba_size = simple_strtoul(++s, &s, 16);
dfu->data.mmc.lba_blk_size = get_mmc_blk_size(dfu->dev_num);
} else if (!strcmp(st, "fat")) {
dfu->layout = DFU_FS_FAT;
} else if (!strcmp(st, "ext4")) {
dfu->layout = DFU_FS_EXT4;
} else if (!strcmp(st, "part")) {
dfu->layout = DFU_RAW_ADDR;
dev = simple_strtoul(s, &s, 10);
s++;
part = simple_strtoul(s, &s, 10);
mmc = find_mmc_device(dev);
if (mmc == NULL || mmc_init(mmc)) {
printf("%s: could not find mmc device #%d!\n",
__func__, dev);
return -ENODEV;
}
blk_dev = &mmc->block_dev;
if (get_partition_info(blk_dev, part, &partinfo) != 0) {
printf("%s: could not find partition #%d on mmc device #%d!\n",
__func__, part, dev);
return -ENODEV;
}
dfu->data.mmc.lba_start = partinfo.start;
dfu->data.mmc.lba_size = partinfo.size;
dfu->data.mmc.lba_blk_size = partinfo.blksz;
} else {
printf("%s: Memory layout (%s) not supported!\n", __func__, st);
return -ENODEV;
}
if (dfu->layout == DFU_FS_EXT4 || dfu->layout == DFU_FS_FAT) {
dfu->data.mmc.dev = simple_strtoul(s, &s, 10);
dfu->data.mmc.part = simple_strtoul(++s, &s, 10);
}
dfu->read_medium = dfu_read_medium_mmc;
dfu->write_medium = dfu_write_medium_mmc;
dfu->flush_medium = dfu_flush_medium_mmc;
/* initial state */
dfu->inited = 0;
return 0;
}
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