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/*
* dfu.c -- DFU back-end routines
*
* 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 <mmc.h>
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_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
struct mmc *mmc = find_mmc_device(dfu->dev_num);
u32 blk_start, blk_count, n = 0;
/*
* 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;
}
debug("%s: %s dev: %d start: %d cnt: %d buf: 0x%p\n", __func__,
op == DFU_OP_READ ? "MMC READ" : "MMC WRITE", dfu->dev_num,
blk_start, blk_count, buf);
switch (op) {
case DFU_OP_READ:
n = mmc->block_dev.block_read(dfu->dev_num, blk_start,
blk_count, buf);
break;
case DFU_OP_WRITE:
n = mmc->block_dev.block_write(dfu->dev_num, blk_start,
blk_count, buf);
break;
default:
error("Operation not supported\n");
}
if (n != blk_count) {
error("MMC operation failed");
return -EIO;
}
return 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_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);
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);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
return -1;
}
if (op == DFU_OP_WRITE)
sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len);
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;
}
/*
* @param s Parameter string containing space-separated arguments:
* 1st:
* raw (raw read/write)
* fat (files)
* ext4 (^)
* part (partition image)
* 2nd and 3rd:
* lba_start and lba_size, for raw write
* mmc_dev and mmc_part, for filesystems and part
*/
int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s)
{
const char *entity_type;
size_t second_arg;
size_t third_arg;
struct mmc *mmc;
const char *argv[3];
const char **parg = argv;
for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
*parg = strsep(&s, " ");
if (*parg == NULL) {
error("Invalid number of arguments.\n");
return -ENODEV;
}
}
entity_type = argv[0];
/*
* Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
* with default 10.
*/
second_arg = simple_strtoul(argv[1], NULL, 0);
third_arg = simple_strtoul(argv[2], NULL, 0);
mmc = find_mmc_device(dfu->dev_num);
if (mmc == NULL) {
error("Couldn't find MMC device no. %d.\n", dfu->dev_num);
return -ENODEV;
}
if (mmc_init(mmc)) {
error("Couldn't init MMC device.\n");
return -ENODEV;
}
if (!strcmp(entity_type, "raw")) {
dfu->layout = DFU_RAW_ADDR;
dfu->data.mmc.lba_start = second_arg;
dfu->data.mmc.lba_size = third_arg;
dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
} else if (!strcmp(entity_type, "part")) {
disk_partition_t partinfo;
block_dev_desc_t *blk_dev = &mmc->block_dev;
int mmcdev = second_arg;
int mmcpart = third_arg;
if (get_partition_info(blk_dev, mmcpart, &partinfo) != 0) {
error("Couldn't find part #%d on mmc device #%d\n",
mmcpart, mmcdev);
return -ENODEV;
}
dfu->layout = DFU_RAW_ADDR;
dfu->data.mmc.lba_start = partinfo.start;
dfu->data.mmc.lba_size = partinfo.size;
dfu->data.mmc.lba_blk_size = partinfo.blksz;
} else if (!strcmp(entity_type, "fat")) {
dfu->layout = DFU_FS_FAT;
} else if (!strcmp(entity_type, "ext4")) {
dfu->layout = DFU_FS_EXT4;
} else {
error("Memory layout (%s) not supported!\n", entity_type);
return -ENODEV;
}
/* if it's NOT a raw write */
if (strcmp(entity_type, "raw")) {
dfu->data.mmc.dev = second_arg;
dfu->data.mmc.part = third_arg;
}
dfu->dev_type = DFU_DEV_MMC;
dfu->read_medium = dfu_read_medium_mmc;
dfu->write_medium = dfu_write_medium_mmc;
dfu->flush_medium = dfu_flush_medium_mmc;
dfu->inited = 0;
return 0;
}
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