1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2020 Wind River Systems, Inc.
*
* Author:
* Bin Meng <bin.meng@windriver.com>
*
* A command interface to access misc devices with MISC uclass driver APIs.
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <errno.h>
#include <misc.h>
enum misc_op {
MISC_OP_READ,
MISC_OP_WRITE
};
static char *misc_op_str[] = {
"read",
"write"
};
static int do_misc_list(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
struct udevice *dev;
printf("Device Index Driver\n");
printf("-------------------------------------\n");
for (uclass_first_device(UCLASS_MISC, &dev);
dev;
uclass_next_device(&dev)) {
printf("%-20s %5d %10s\n", dev->name, dev_seq(dev),
dev->driver->name);
}
return 0;
}
static int do_misc_op(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[], enum misc_op op)
{
int (*misc_op)(struct udevice *, int, void *, int);
struct udevice *dev;
int offset;
void *buf;
int size;
int ret;
ret = uclass_get_device_by_name(UCLASS_MISC, argv[0], &dev);
if (ret) {
printf("Unable to find device %s\n", argv[0]);
return ret;
}
offset = hextoul(argv[1], NULL);
buf = (void *)hextoul(argv[2], NULL);
size = hextoul(argv[3], NULL);
if (op == MISC_OP_READ)
misc_op = misc_read;
else
misc_op = misc_write;
ret = misc_op(dev, offset, buf, size);
if (ret < 0) {
if (ret == -ENOSYS) {
printf("The device does not support %s\n",
misc_op_str[op]);
ret = 0;
}
} else {
if (ret == size)
ret = 0;
else
printf("Partially %s %d bytes\n", misc_op_str[op], ret);
}
return ret;
}
static int do_misc_read(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_READ);
}
static int do_misc_write(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_WRITE);
}
static struct cmd_tbl misc_commands[] = {
U_BOOT_CMD_MKENT(list, 0, 1, do_misc_list, "", ""),
U_BOOT_CMD_MKENT(read, 4, 1, do_misc_read, "", ""),
U_BOOT_CMD_MKENT(write, 4, 1, do_misc_write, "", ""),
};
static int do_misc(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
struct cmd_tbl *misc_cmd;
int ret;
if (argc < 2)
return CMD_RET_USAGE;
misc_cmd = find_cmd_tbl(argv[1], misc_commands,
ARRAY_SIZE(misc_commands));
argc -= 2;
argv += 2;
if (!misc_cmd || argc != misc_cmd->maxargs)
return CMD_RET_USAGE;
ret = misc_cmd->cmd(misc_cmd, flag, argc, argv);
return cmd_process_error(misc_cmd, ret);
}
U_BOOT_CMD(
misc, 6, 1, do_misc,
"Access miscellaneous devices with MISC uclass driver APIs",
"list - list all miscellaneous devices\n"
"misc read name offset addr len - read `len' bytes starting at\n"
" `offset' of device `name'\n"
" to memory at `addr'\n"
"misc write name offset addr len - write `len' bytes starting at\n"
" `offset' of device `name'\n"
" from memory at `addr'"
);
|
