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/*
* (C) Copyright 2013
* Afzal Mohammed <afzal.mohd.ma@gmail.com>
*
* Reference: dfu_mmc.c
* 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 <dfu.h>
static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
if (dfu->layout != DFU_RAM_ADDR) {
error("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
return -EINVAL;
}
if (offset > dfu->data.ram.size) {
error("request exceeds allowed area\n");
return -EINVAL;
}
if (op == DFU_OP_WRITE)
memcpy(dfu->data.ram.start + offset, buf, *len);
else
memcpy(buf, dfu->data.ram.start + offset, *len);
return 0;
}
static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
void *buf, long *len)
{
return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
}
static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
void *buf, long *len)
{
if (!*len) {
*len = dfu->data.ram.size;
return 0;
}
return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
}
int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s)
{
char *st;
dfu->dev_type = DFU_DEV_RAM;
st = strsep(&s, " ");
if (strcmp(st, "ram")) {
error("unsupported device: %s\n", st);
return -ENODEV;
}
dfu->layout = DFU_RAM_ADDR;
dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16);
s++;
dfu->data.ram.size = simple_strtoul(s, &s, 16);
dfu->write_medium = dfu_write_medium_ram;
dfu->read_medium = dfu_read_medium_ram;
dfu->inited = 0;
return 0;
}
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