drivers/sound/adlib_card.c

   1 /*
   2  * sound/adlib_card.c
   3  *
   4  * Detection routine for the AdLib card.
   5  *
   6  * Copyright (C) by Hannu Savolainen 1993-1997
   7  *
   8  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
   9  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  10  * for more info.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15
  16 #include "sound_config.h"
  17
  18 #include "opl3.h"
  19
  20 static void __init attach_adlib_card(struct address_info *hw_config)
  21 {
  22         hw_config->slots[0] = opl3_init(hw_config->io_base, hw_config->osp, THIS_MODULE);
  23         request_region(hw_config->io_base, 4, "OPL3/OPL2");
  24 }
  25
  26 static int __init probe_adlib(struct address_info *hw_config)
  27 {
  28         if (check_region(hw_config->io_base, 4)) {
  29                 DDB(printk("opl3.c: I/O port %x already in use\n", hw_config->io_base));
  30                 return 0;
  31         }
  32         return opl3_detect(hw_config->io_base, hw_config->osp);
  33 }
  34
  35 static struct address_info cfg;
  36
  37 static int __initdata io = -1;
  38
  39 MODULE_PARM(io, "i");
  40
  41 static int __init init_adlib(void)
  42 {
  43         cfg.io_base = io;
  44
  45         if (cfg.io_base == -1) {
  46                 printk(KERN_ERR "adlib: must specify I/O address.\n");
  47                 return -EINVAL;
  48         }
  49         if (probe_adlib(&cfg) == 0)
  50                 return -ENODEV;
  51         attach_adlib_card(&cfg);
  52
  53         return 0;
  54 }
  55
  56 static void __exit cleanup_adlib(void)
  57 {
  58         release_region(cfg.io_base, 4);
  59         sound_unload_synthdev(cfg.slots[0]);
  60
  61 }
  62
  63 module_init(init_adlib);
  64 module_exit(cleanup_adlib);
  65
  66 #ifndef MODULE
  67 static int __init setup_adlib(char *str)
  68 {
  69         /* io */
  70         int ints[2];
  71         str = get_options(str, ARRAY_SIZE(ints), ints);
  72
  73         io = ints[1];
  74
  75         return 1;
  76 }
  77 __setup("adlib=", setup_adlib);
  78 #endif