mirror of
https://github.com/AsahiLinux/u-boot
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78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
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/*
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* (C) Copyright 2013
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* Afzal Mohammed <afzal.mohd.ma@gmail.com>
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*
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* Reference: dfu_mmc.c
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* Copyright (C) 2012 Samsung Electronics
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* author: Lukasz Majewski <l.majewski@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <malloc.h>
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#include <errno.h>
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#include <dfu.h>
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static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
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u64 offset, void *buf, long *len)
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{
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if (dfu->layout != DFU_RAM_ADDR) {
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error("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
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return -EINVAL;
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}
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if (offset > dfu->data.ram.size) {
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error("request exceeds allowed area\n");
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return -EINVAL;
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}
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if (op == DFU_OP_WRITE)
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memcpy(dfu->data.ram.start + offset, buf, *len);
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else
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memcpy(buf, dfu->data.ram.start + offset, *len);
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return 0;
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}
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static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
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void *buf, long *len)
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{
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return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
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}
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static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
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void *buf, long *len)
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{
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if (!*len) {
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*len = dfu->data.ram.size;
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return 0;
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}
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return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
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}
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int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s)
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{
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char *st;
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dfu->dev_type = DFU_DEV_RAM;
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st = strsep(&s, " ");
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if (strcmp(st, "ram")) {
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error("unsupported device: %s\n", st);
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return -ENODEV;
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}
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dfu->layout = DFU_RAM_ADDR;
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dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16);
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s++;
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dfu->data.ram.size = simple_strtoul(s, &s, 16);
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dfu->write_medium = dfu_write_medium_ram;
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dfu->read_medium = dfu_read_medium_ram;
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dfu->inited = 0;
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return 0;
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}
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