/usr/share/doc/libofapi-dev/examples/soundbus.c is in libofapi-dev 0git20070620-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #include <ofapi/of_api.h>
void print_resources(struct device_node *node)
{
void *property;
int plen;
int ranges = 0;
int x = 0;
uint32_t start, end;
int rsrc = 0;
property = of_find_property(node, "reg", &plen);
if(!property)
return;
ranges = plen/4;
puts("Resources: ");
for(x = 1; x <= ranges;x+=2 ) {
of_property_to_n_uint32(&start, property, plen, x);
of_property_to_n_uint32(&end, property, plen, x+1);
end += start + 0x80000000; start += 0x80000000;
printf(" rsrc[%d] 0x%08x - 0x%08x\n", rsrc++, start, end);
}
free(property);
}
void print_model(struct device_node *node)
{
void *property;
char *str;
int plen;
property = of_find_property(node, "model", &plen);
if(!property)
return;
str = property;
str[plen-1] = '\0';
printf("Model: %s\n", str);
free(property);
}
void print_sound(struct device_node *node)
{
void *property;
char *str;
int plen;
uint32_t layout_id;
property = of_find_property(node, "compatible", &plen);
if(!property)
return;
str = property;
str[plen-1]='\0';
printf("Compatible: %s\n", str);
free(property);
property = of_find_property(node, "layout-id", &plen);
if(!property)
return;
of_property_to_uint32(&layout_id, property, plen);
printf("Layout ID: %d\n", layout_id);
free(property);
}
int main(int argc, char **argv)
{
struct device_node *root;
struct device_node *sound;
struct device_node *soundbus;
if(argc == 1)
of_init();
else
of_init_root(argv[1]);
if((root = of_find_node_by_path("/")) == NULL)
of_error("Could not find node");
if((sound = of_find_node_by_name("sound", 0)) == NULL)
of_error("Could not find sound");
if((soundbus = of_get_parent(sound)) == NULL)
of_error("Could not find soundbus");
print_model(root);
print_sound(sound);
print_resources(soundbus);
of_free_node(root);
of_free_node(sound);
of_free_node(soundbus);
return EXIT_SUCCESS;
}
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