summaryrefslogtreecommitdiff
path: root/lib/fdtdec_test.c
blob: cc8b918f64dac3c958911c95ed37b39982ae5f89 (plain)
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
 * Some very basic tests for fdtdec, accessed through test_fdtdec command.
 * They are easiest to use with sandbox.
 *
 * Copyright (c) 2011 The Chromium OS Authors.
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <malloc.h>
#include <os.h>

/* The size of our test fdt blob */
#define FDT_SIZE	(16 * 1024)

/**
 * Check if an operation failed, and if so, print an error
 *
 * @param oper_name	Name of operation
 * @param err		Error code to check
 *
 * @return 0 if ok, -1 if there was an error
 */
static int fdt_checkerr(const char *oper_name, int err)
{
	if (err) {
		printf("%s: %s: %s\n", __func__, oper_name, fdt_strerror(err));
		return -1;
	}

	return 0;
}

/**
 * Check the result of an operation and if incorrect, print an error
 *
 * @param oper_name	Name of operation
 * @param expected	Expected value
 * @param value		Actual value
 *
 * @return 0 if ok, -1 if there was an error
 */
static int checkval(const char *oper_name, int expected, int value)
{
	if (expected != value) {
		printf("%s: %s: expected %d, but returned %d\n", __func__,
		       oper_name, expected, value);
		return -1;
	}

	return 0;
}

#define CHECK(op)	if (fdt_checkerr(#op, op)) return -1
#define CHECKVAL(op, expected)	\
	if (checkval(#op, expected, op)) \
		return -1
#define CHECKOK(op)	CHECKVAL(op, 0)

/* maximum number of nodes / aliases to generate */
#define MAX_NODES	20

/*
 * Make a test fdt
 *
 * @param fdt		Device tree pointer
 * @param size		Size of device tree blob
 * @param aliases	Specifies alias assignments. Format is a list of items
 *			separated by space. Items are #a where
 *				# is the alias number
 *				a is the node to point to
 * @param nodes		Specifies nodes to generate (a=0, b=1), upper case
 *			means to create a disabled node
 */
static int make_fdt(void *fdt, int size, const char *aliases,
		    const char *nodes)
{
	char name[20], value[20];
	const char *s;
	int fd;

	CHECK(fdt_create(fdt, size));
	CHECK(fdt_finish_reservemap(fdt));
	CHECK(fdt_begin_node(fdt, ""));

	CHECK(fdt_begin_node(fdt, "aliases"));
	for (s = aliases; *s;) {
		sprintf(name, "i2c%c", *s);
		sprintf(value, "/i2c%d@0", s[1] - 'a');
		CHECK(fdt_property_string(fdt, name, value));
		s += 2 + (s[2] != '\0');
	}
	CHECK(fdt_end_node(fdt));

	for (s = nodes; *s; s++) {
		sprintf(value, "i2c%d@0", (*s & 0xdf) - 'A');
		CHECK(fdt_begin_node(fdt, value));
		CHECK(fdt_property_string(fdt, "compatible",
			fdtdec_get_compatible(COMPAT_UNKNOWN)));
		if (*s <= 'Z')
			CHECK(fdt_property_string(fdt, "status", "disabled"));
		CHECK(fdt_end_node(fdt));
	}

	CHECK(fdt_end_node(fdt));
	CHECK(fdt_finish(fdt));
	CHECK(fdt_pack(fdt));
#if defined(DEBUG) && defined(CONFIG_SANDBOX)
	fd = os_open("/tmp/fdtdec-text.dtb", OS_O_CREAT | OS_O_WRONLY);
	if (fd == -1) {
		printf("Could not open .dtb file to write\n");
		return -1;
	}
	os_write(fd, fdt, size);
	os_close(fd);
#endif
	return 0;
}

static int run_test(const char *aliases, const char *nodes, const char *expect)
{
	int list[MAX_NODES];
	const char *s;
	void *blob;
	int i;

	blob = malloc(FDT_SIZE);
	if (!blob) {
		printf("%s: out of memory\n", __func__);
		return 1;
	}

	printf("aliases=%s, nodes=%s, expect=%s: ", aliases, nodes, expect);
	CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0);
	CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c",
			COMPAT_UNKNOWN,
			list, ARRAY_SIZE(list)), strlen(expect));

	/* Check we got the right ones */
	for (i = 0, s = expect; *s; s++, i++) {
		int want = *s;
		const char *name;
		int got = ' ';

		name = list[i] ? fdt_get_name(blob, list[i], NULL) : NULL;
		if (name)
			got = name[3] + 'a' - '0';

		if (got != want) {
			printf("Position %d: Expected '%c', got '%c' ('%s')\n",
			       i, want, got, name);
			return 1;
		}
	}

	printf("pass\n");
	return 0;
}

static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc,
			  char * const argv[])
{
	/* basic tests */
	CHECKOK(run_test("", "", ""));
	CHECKOK(run_test("1e 3d", "", ""));

	/*
	 * 'a' represents 0, 'b' represents 1, etc.
	 * The first character is the alias number, the second is the node
	 * number. So the params mean:
	 * 0a 1b	: point alias 0 to node 0 (a), alias 1 to node 1(b)
	 * ab		: to create nodes 0 and 1 (a and b)
	 * ab		: we expect the function to return two nodes, in
	 *		  the order 0, 1
	 */
	CHECKOK(run_test("0a 1b", "ab", "ab"));

	CHECKOK(run_test("0a 1c", "ab", "ab"));
	CHECKOK(run_test("1c", "ab", "ab"));
	CHECKOK(run_test("1b", "ab", "ab"));
	CHECKOK(run_test("0b", "ab", "ba"));
	CHECKOK(run_test("0b 2d", "dbc", "bcd"));
	CHECKOK(run_test("0d 3a 1c 2b", "dbac", "dcba"));

	/* things with holes */
	CHECKOK(run_test("1b 3d", "dbc", "cb d"));
	CHECKOK(run_test("1e 3d", "dbc", "bc d"));

	/* no aliases */
	CHECKOK(run_test("", "dbac", "dbac"));

	/* disabled nodes */
	CHECKOK(run_test("0d 3a 1c 2b", "dBac", "dc a"));
	CHECKOK(run_test("0b 2d", "DBc", "c"));
	CHECKOK(run_test("0b 4d 2c", "DBc", "  c"));

	/* conflicting aliases - first one gets it */
	CHECKOK(run_test("2a 1a 0a", "a", "  a"));
	CHECKOK(run_test("0a 1a 2a", "a", "a"));

	printf("Test passed\n");
	return 0;
}

U_BOOT_CMD(
	test_fdtdec, 3, 1, do_test_fdtdec,
	"test_fdtdec",
	"Run tests for fdtdec library");