/* * (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; }