root/sound/isa/adlib.c

DEFINITIONS

1. snd_adlib_match
2. snd_adlib_free
3. snd_adlib_probe
4. snd_adlib_remove

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * AdLib FM card driver.
   4  */
   5 
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/isa.h>
   9 #include <sound/core.h>
  10 #include <sound/initval.h>
  11 #include <sound/opl3.h>
  12 
  13 #define CRD_NAME "AdLib FM"
  14 #define DEV_NAME "adlib"
  15 
  16 MODULE_DESCRIPTION(CRD_NAME);
  17 MODULE_AUTHOR("Rene Herman");
  18 MODULE_LICENSE("GPL");
  19 
  20 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  21 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  22 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
  23 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  24 
  25 module_param_array(index, int, NULL, 0444);
  26 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
  27 module_param_array(id, charp, NULL, 0444);
  28 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
  29 module_param_array(enable, bool, NULL, 0444);
  30 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
  31 module_param_hw_array(port, long, ioport, NULL, 0444);
  32 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
  33 
  34 static int snd_adlib_match(struct device *dev, unsigned int n)
  35 {
  36         if (!enable[n])
  37                 return 0;
  38 
  39         if (port[n] == SNDRV_AUTO_PORT) {
  40                 dev_err(dev, "please specify port\n");
  41                 return 0;
  42         }
  43         return 1;
  44 }
  45 
  46 static void snd_adlib_free(struct snd_card *card)
  47 {
  48         release_and_free_resource(card->private_data);
  49 }
  50 
  51 static int snd_adlib_probe(struct device *dev, unsigned int n)
  52 {
  53         struct snd_card *card;
  54         struct snd_opl3 *opl3;
  55         int error;
  56 
  57         error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
  58         if (error < 0) {
  59                 dev_err(dev, "could not create card\n");
  60                 return error;
  61         }
  62 
  63         card->private_data = request_region(port[n], 4, CRD_NAME);
  64         if (!card->private_data) {
  65                 dev_err(dev, "could not grab ports\n");
  66                 error = -EBUSY;
  67                 goto out;
  68         }
  69         card->private_free = snd_adlib_free;
  70 
  71         strcpy(card->driver, DEV_NAME);
  72         strcpy(card->shortname, CRD_NAME);
  73         sprintf(card->longname, CRD_NAME " at %#lx", port[n]);
  74 
  75         error = snd_opl3_create(card, port[n], port[n] + 2, OPL3_HW_AUTO, 1, &opl3);
  76         if (error < 0) {
  77                 dev_err(dev, "could not create OPL\n");
  78                 goto out;
  79         }
  80 
  81         error = snd_opl3_hwdep_new(opl3, 0, 0, NULL);
  82         if (error < 0) {
  83                 dev_err(dev, "could not create FM\n");
  84                 goto out;
  85         }
  86 
  87         error = snd_card_register(card);
  88         if (error < 0) {
  89                 dev_err(dev, "could not register card\n");
  90                 goto out;
  91         }
  92 
  93         dev_set_drvdata(dev, card);
  94         return 0;
  95 
  96 out:    snd_card_free(card);
  97         return error;
  98 }
  99 
 100 static int snd_adlib_remove(struct device *dev, unsigned int n)
 101 {
 102         snd_card_free(dev_get_drvdata(dev));
 103         return 0;
 104 }
 105 
 106 static struct isa_driver snd_adlib_driver = {
 107         .match          = snd_adlib_match,
 108         .probe          = snd_adlib_probe,
 109         .remove         = snd_adlib_remove,
 110 
 111         .driver         = {
 112                 .name   = DEV_NAME
 113         }
 114 };
 115 
 116 module_isa_driver(snd_adlib_driver, SNDRV_CARDS);