LXR uboot/drivers/dfu/dfu

   1/*
   2 * (C) Copyright 2013
   3 * Afzal Mohammed <afzal.mohd.ma@gmail.com>
   4 *
   5 * Reference: dfu_mmc.c
   6 * Copyright (C) 2012 Samsung Electronics
   7 * author: Lukasz Majewski <l.majewski@samsung.com>
   8 *
   9 * SPDX-License-Identifier:     GPL-2.0+
  10 */
  11
  12#include <common.h>
  13#include <malloc.h>
  14#include <errno.h>
  15#include <dfu.h>
  16
  17static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
  18                                   u64 offset, void *buf, long *len)
  19{
  20        if (dfu->layout != DFU_RAM_ADDR) {
  21                error("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
  22                return  -EINVAL;
  23        }
  24
  25        if (offset > dfu->data.ram.size) {
  26                error("request exceeds allowed area\n");
  27                return -EINVAL;
  28        }
  29
  30        if (op == DFU_OP_WRITE)
  31                memcpy(dfu->data.ram.start + offset, buf, *len);
  32        else
  33                memcpy(buf, dfu->data.ram.start + offset, *len);
  34
  35        return 0;
  36}
  37
  38static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
  39                                void *buf, long *len)
  40{
  41        return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
  42}
  43
  44static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
  45                               void *buf, long *len)
  46{
  47        if (!*len) {
  48                *len = dfu->data.ram.size;
  49                return 0;
  50        }
  51
  52        return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
  53}
  54
  55int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s)
  56{
  57        char *st;
  58
  59        dfu->dev_type = DFU_DEV_RAM;
  60        st = strsep(&s, " ");
  61        if (strcmp(st, "ram")) {
  62                error("unsupported device: %s\n", st);
  63                return -ENODEV;
  64        }
  65
  66        dfu->layout = DFU_RAM_ADDR;
  67        dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16);
  68        s++;
  69        dfu->data.ram.size = simple_strtoul(s, &s, 16);
  70
  71        dfu->write_medium = dfu_write_medium_ram;
  72        dfu->read_medium = dfu_read_medium_ram;
  73
  74        dfu->inited = 0;
  75
  76        return 0;
  77}
  78