1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2013
3*4882a593Smuzhiyun * Afzal Mohammed <afzal.mohd.ma@gmail.com>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Reference: dfu_mmc.c
6*4882a593Smuzhiyun * Copyright (C) 2012 Samsung Electronics
7*4882a593Smuzhiyun * author: Lukasz Majewski <l.majewski@samsung.com>
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <common.h>
13*4882a593Smuzhiyun #include <malloc.h>
14*4882a593Smuzhiyun #include <errno.h>
15*4882a593Smuzhiyun #include <dfu.h>
16*4882a593Smuzhiyun
dfu_transfer_medium_ram(enum dfu_op op,struct dfu_entity * dfu,u64 offset,void * buf,long * len)17*4882a593Smuzhiyun static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
18*4882a593Smuzhiyun u64 offset, void *buf, long *len)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun if (dfu->layout != DFU_RAM_ADDR) {
21*4882a593Smuzhiyun pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
22*4882a593Smuzhiyun return -EINVAL;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun if (offset > dfu->data.ram.size) {
26*4882a593Smuzhiyun pr_err("request exceeds allowed area\n");
27*4882a593Smuzhiyun return -EINVAL;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun if (op == DFU_OP_WRITE)
31*4882a593Smuzhiyun memcpy(dfu->data.ram.start + offset, buf, *len);
32*4882a593Smuzhiyun else
33*4882a593Smuzhiyun memcpy(buf, dfu->data.ram.start + offset, *len);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun return 0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
dfu_write_medium_ram(struct dfu_entity * dfu,u64 offset,void * buf,long * len)38*4882a593Smuzhiyun static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
39*4882a593Smuzhiyun void *buf, long *len)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
dfu_get_medium_size_ram(struct dfu_entity * dfu,u64 * size)44*4882a593Smuzhiyun int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun *size = dfu->data.ram.size;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
dfu_read_medium_ram(struct dfu_entity * dfu,u64 offset,void * buf,long * len)51*4882a593Smuzhiyun static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
52*4882a593Smuzhiyun void *buf, long *len)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
dfu_fill_entity_ram(struct dfu_entity * dfu,char * devstr,char * s)57*4882a593Smuzhiyun int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun const char *argv[3];
60*4882a593Smuzhiyun const char **parg = argv;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
63*4882a593Smuzhiyun *parg = strsep(&s, " ");
64*4882a593Smuzhiyun if (*parg == NULL) {
65*4882a593Smuzhiyun pr_err("Invalid number of arguments.\n");
66*4882a593Smuzhiyun return -ENODEV;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun dfu->dev_type = DFU_DEV_RAM;
71*4882a593Smuzhiyun if (strcmp(argv[0], "ram")) {
72*4882a593Smuzhiyun pr_err("unsupported device: %s\n", argv[0]);
73*4882a593Smuzhiyun return -ENODEV;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun dfu->layout = DFU_RAM_ADDR;
77*4882a593Smuzhiyun dfu->data.ram.start = (void *)simple_strtoul(argv[1], NULL, 16);
78*4882a593Smuzhiyun dfu->data.ram.size = simple_strtoul(argv[2], NULL, 16);
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun dfu->write_medium = dfu_write_medium_ram;
81*4882a593Smuzhiyun dfu->get_medium_size = dfu_get_medium_size_ram;
82*4882a593Smuzhiyun dfu->read_medium = dfu_read_medium_ram;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun dfu->inited = 0;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun return 0;
87*4882a593Smuzhiyun }
88