fdtdec: test: Use compound statement macros
[oweals/u-boot.git] / lib / fdtdec_test.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Some very basic tests for fdtdec, accessed through test_fdtdec command.
4  * They are easiest to use with sandbox.
5  *
6  * Copyright (c) 2011 The Chromium OS Authors.
7  */
8
9 #include <common.h>
10 #include <fdtdec.h>
11 #include <linux/libfdt.h>
12 #include <malloc.h>
13 #include <os.h>
14
15 /* The size of our test fdt blob */
16 #define FDT_SIZE        (16 * 1024)
17
18 #define CHECK(op) ({                                                    \
19                 int err = op;                                           \
20                 if (err < 0) {                                          \
21                         printf("%s: %s: %s\n", __func__, #op,           \
22                                fdt_strerror(err));                      \
23                         return err;                                     \
24                 }                                                       \
25                                                                         \
26                 err;                                                    \
27         })
28
29 #define CHECKVAL(op, expected) ({                                       \
30                 int err = op;                                           \
31                 if (err != expected) {                                  \
32                         printf("%s: %s: expected %d, but returned %d\n",\
33                                __func__, #op, expected, err);           \
34                         return err;                                     \
35                 }                                                       \
36                                                                         \
37                 err;                                                    \
38         })
39
40 #define CHECKOK(op)     CHECKVAL(op, 0)
41
42 /* maximum number of nodes / aliases to generate */
43 #define MAX_NODES       20
44
45 /*
46  * Make a test fdt
47  *
48  * @param fdt           Device tree pointer
49  * @param size          Size of device tree blob
50  * @param aliases       Specifies alias assignments. Format is a list of items
51  *                      separated by space. Items are #a where
52  *                              # is the alias number
53  *                              a is the node to point to
54  * @param nodes         Specifies nodes to generate (a=0, b=1), upper case
55  *                      means to create a disabled node
56  */
57 static int make_fdt(void *fdt, int size, const char *aliases,
58                     const char *nodes)
59 {
60         char name[20], value[20];
61         const char *s;
62 #if defined(DEBUG) && defined(CONFIG_SANDBOX)
63         int fd;
64 #endif
65
66         CHECK(fdt_create(fdt, size));
67         CHECK(fdt_finish_reservemap(fdt));
68         CHECK(fdt_begin_node(fdt, ""));
69
70         CHECK(fdt_begin_node(fdt, "aliases"));
71         for (s = aliases; *s;) {
72                 sprintf(name, "i2c%c", *s);
73                 sprintf(value, "/i2c%d@0", s[1] - 'a');
74                 CHECK(fdt_property_string(fdt, name, value));
75                 s += 2 + (s[2] != '\0');
76         }
77         CHECK(fdt_end_node(fdt));
78
79         for (s = nodes; *s; s++) {
80                 sprintf(value, "i2c%d@0", (*s & 0xdf) - 'A');
81                 CHECK(fdt_begin_node(fdt, value));
82                 CHECK(fdt_property_string(fdt, "compatible",
83                         fdtdec_get_compatible(COMPAT_UNKNOWN)));
84                 if (*s <= 'Z')
85                         CHECK(fdt_property_string(fdt, "status", "disabled"));
86                 CHECK(fdt_end_node(fdt));
87         }
88
89         CHECK(fdt_end_node(fdt));
90         CHECK(fdt_finish(fdt));
91         CHECK(fdt_pack(fdt));
92 #if defined(DEBUG) && defined(CONFIG_SANDBOX)
93         fd = os_open("/tmp/fdtdec-text.dtb", OS_O_CREAT | OS_O_WRONLY);
94         if (fd == -1) {
95                 printf("Could not open .dtb file to write\n");
96                 return -1;
97         }
98         os_write(fd, fdt, size);
99         os_close(fd);
100 #endif
101         return 0;
102 }
103
104 static int run_test(const char *aliases, const char *nodes, const char *expect)
105 {
106         int list[MAX_NODES];
107         const char *s;
108         void *blob;
109         int i;
110
111         blob = malloc(FDT_SIZE);
112         if (!blob) {
113                 printf("%s: out of memory\n", __func__);
114                 return 1;
115         }
116
117         printf("aliases=%s, nodes=%s, expect=%s: ", aliases, nodes, expect);
118         CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0);
119         CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c",
120                         COMPAT_UNKNOWN,
121                         list, ARRAY_SIZE(list)), (int)strlen(expect));
122
123         /* Check we got the right ones */
124         for (i = 0, s = expect; *s; s++, i++) {
125                 int want = *s;
126                 const char *name;
127                 int got = ' ';
128
129                 name = list[i] ? fdt_get_name(blob, list[i], NULL) : NULL;
130                 if (name)
131                         got = name[3] + 'a' - '0';
132
133                 if (got != want) {
134                         printf("Position %d: Expected '%c', got '%c' ('%s')\n",
135                                i, want, got, name);
136                         return 1;
137                 }
138         }
139
140         printf("pass\n");
141         return 0;
142 }
143
144 static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc,
145                           char * const argv[])
146 {
147         /* basic tests */
148         CHECKOK(run_test("", "", ""));
149         CHECKOK(run_test("1e 3d", "", ""));
150
151         /*
152          * 'a' represents 0, 'b' represents 1, etc.
153          * The first character is the alias number, the second is the node
154          * number. So the params mean:
155          * 0a 1b        : point alias 0 to node 0 (a), alias 1 to node 1(b)
156          * ab           : to create nodes 0 and 1 (a and b)
157          * ab           : we expect the function to return two nodes, in
158          *                the order 0, 1
159          */
160         CHECKOK(run_test("0a 1b", "ab", "ab"));
161
162         CHECKOK(run_test("0a 1c", "ab", "ab"));
163         CHECKOK(run_test("1c", "ab", "ab"));
164         CHECKOK(run_test("1b", "ab", "ab"));
165         CHECKOK(run_test("0b", "ab", "ba"));
166         CHECKOK(run_test("0b 2d", "dbc", "bcd"));
167         CHECKOK(run_test("0d 3a 1c 2b", "dbac", "dcba"));
168
169         /* things with holes */
170         CHECKOK(run_test("1b 3d", "dbc", "cb d"));
171         CHECKOK(run_test("1e 3d", "dbc", "bc d"));
172
173         /* no aliases */
174         CHECKOK(run_test("", "dbac", "dbac"));
175
176         /* disabled nodes */
177         CHECKOK(run_test("0d 3a 1c 2b", "dBac", "dc a"));
178         CHECKOK(run_test("0b 2d", "DBc", "c"));
179         CHECKOK(run_test("0b 4d 2c", "DBc", "  c"));
180
181         /* conflicting aliases - first one gets it */
182         CHECKOK(run_test("2a 1a 0a", "a", "  a"));
183         CHECKOK(run_test("0a 1a 2a", "a", "a"));
184
185         printf("Test passed\n");
186         return 0;
187 }
188
189 U_BOOT_CMD(
190         test_fdtdec, 3, 1, do_test_fdtdec,
191         "test_fdtdec",
192         "Run tests for fdtdec library");