1  component out8;
 2  pin out unsigned out_ "Output value; only low 8 bits are used";
 3  param r unsigned ioaddr;
 4  
 5  function _;
 6  
 7  option count_function;
 8  option extra_setup;
 9  option extra_cleanup;
10  option constructable no;
11  
12  license "GPL";
13  ;;
14  #include <asm/io.h>
15  
16  #define MAX 8
17  int io[MAX] = {0,};
18  RTAPI_MP_ARRAY_INT(io, MAX, "I/O addresses of out8 boards");
19  
20  int get_count(void) {
21      int i = 0;
22      for(i=0; i<MAX && io[i]; i++) { /* Nothing */ }
23      return i;
24  }
25  
26  EXTRA_SETUP() {
27      if(!rtapi_request_region(io[extra_arg], 1, "out8")) {
28  	// set this I/O port to 0 so that EXTRA_CLEANUP does not release the IO
29  	// ports that were never requested.
30          io[extra_arg] = 0; 
31          return -EBUSY;
32      }
33      ioaddr = io[extra_arg];
34      return 0;
35  }
36  
37  EXTRA_CLEANUP() {
38      int i;
39      for(i=0; i < MAX && io[i]; i++) {
40          rtapi_release_region(io[i], 1);
41      }
42  }
43  
44  FUNCTION(_) { outb(out_, ioaddr); }