xref: /btstack/port/raspi/raspi_get_model.c (revision 63ff2b1e64a6f7fe8fbdd0ac1abfc703a433f88e) 
1 
2 #include <stdint.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 
6 #include "raspi_get_model.h"
7 
8 /**
9  * Raspberry Pi model detection based on,
10  * https://elinux.org/RPi_HardwareHistory
11 **/
raspi_get_model()12 int raspi_get_model()
13 {
14     FILE *f = fopen( "/proc/cpuinfo", "rb" );
15     if( f == NULL )
16     {
17         perror( "can't open cpuinfo!" );
18         return MODEL_UNKNOWN;
19     }
20 
21     int ret = 0;
22     uint32_t revision = 0;
23     uint32_t model = MODEL_UNKNOWN;
24     char line[100] = { 0 };
25     char *ptr = NULL;
26     for(; ret < 1;)
27     {
28         ptr = fgets( line, 100, f );
29         if( ptr == NULL )
30             break;
31         ret = sscanf( line, "Revision : %x\n", &revision );
32     }
33 
34     fclose( f );
35 
36     switch( revision )
37     {
38     case 0x9000c1:
39         model = MODEL_ZERO_W;
40         break;
41     case 0xa02082:
42     case 0xa22082:
43     case 0xa32082:
44         model = MODEL_3B;
45         break;
46     case 0xa020d3:
47         model = MODEL_3BPLUS;
48         break;
49     case 0x9020e0:
50         model = MODEL_3APLUS;
51         break;
52     default:
53         break;
54     }
55 
56     return model;
57 }
58 
59 
60