1 // SPDX-License-Identifier: GPL-2.0+
4 * Afzal Mohammed <afzal.mohd.ma@gmail.com>
7 * Copyright (C) 2012 Samsung Electronics
8 * author: Lukasz Majewski <l.majewski@samsung.com>
16 static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
17 u64 offset, void *buf, long *len)
19 if (dfu->layout != DFU_RAM_ADDR) {
20 pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
24 if (offset > dfu->data.ram.size) {
25 pr_err("request exceeds allowed area\n");
29 if (op == DFU_OP_WRITE)
30 memcpy(dfu->data.ram.start + offset, buf, *len);
32 memcpy(buf, dfu->data.ram.start + offset, *len);
37 static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
40 return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
43 int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size)
45 *size = dfu->data.ram.size;
50 static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
53 return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
56 int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s)
59 const char **parg = argv;
61 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
62 *parg = strsep(&s, " ");
64 pr_err("Invalid number of arguments.\n");
69 dfu->dev_type = DFU_DEV_RAM;
70 if (strcmp(argv[0], "ram")) {
71 pr_err("unsupported device: %s\n", argv[0]);
75 dfu->layout = DFU_RAM_ADDR;
76 dfu->data.ram.start = (void *)simple_strtoul(argv[1], NULL, 16);
77 dfu->data.ram.size = simple_strtoul(argv[2], NULL, 16);
79 dfu->write_medium = dfu_write_medium_ram;
80 dfu->get_medium_size = dfu_get_medium_size_ram;
81 dfu->read_medium = dfu_read_medium_ram;