1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2013
4 * Afzal Mohammed <afzal.mohd.ma@gmail.com>
5 *
6 * Reference: dfu_mmc.c
7 * Copyright (C) 2012 Samsung Electronics
8 * author: Lukasz Majewski <l.majewski@samsung.com>
9 */
10
11 #include <common.h>
12 #include <malloc.h>
13 #include <errno.h>
14 #include <dfu.h>
15
dfu_transfer_medium_ram(enum dfu_op op,struct dfu_entity * dfu,u64 offset,void * buf,long * len)16 static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
17 u64 offset, void *buf, long *len)
18 {
19 if (dfu->layout != DFU_RAM_ADDR) {
20 pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
21 return -EINVAL;
22 }
23
24 if (offset > dfu->data.ram.size) {
25 pr_err("request exceeds allowed area\n");
26 return -EINVAL;
27 }
28
29 if (op == DFU_OP_WRITE)
30 memcpy(dfu->data.ram.start + offset, buf, *len);
31 else
32 memcpy(buf, dfu->data.ram.start + offset, *len);
33
34 return 0;
35 }
36
dfu_write_medium_ram(struct dfu_entity * dfu,u64 offset,void * buf,long * len)37 static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
38 void *buf, long *len)
39 {
40 return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
41 }
42
dfu_get_medium_size_ram(struct dfu_entity * dfu,u64 * size)43 int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size)
44 {
45 *size = dfu->data.ram.size;
46
47 return 0;
48 }
49
dfu_read_medium_ram(struct dfu_entity * dfu,u64 offset,void * buf,long * len)50 static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
51 void *buf, long *len)
52 {
53 return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
54 }
55
dfu_fill_entity_ram(struct dfu_entity * dfu,char * devstr,char * s)56 int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s)
57 {
58 const char *argv[3];
59 const char **parg = argv;
60
61 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
62 *parg = strsep(&s, " ");
63 if (*parg == NULL) {
64 pr_err("Invalid number of arguments.\n");
65 return -ENODEV;
66 }
67 }
68
69 dfu->dev_type = DFU_DEV_RAM;
70 if (strcmp(argv[0], "ram")) {
71 pr_err("unsupported device: %s\n", argv[0]);
72 return -ENODEV;
73 }
74
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);
78
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;
82
83 dfu->inited = 0;
84
85 return 0;
86 }
87