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Linux/sound/isa/adlib.c

  1 /*
  2  * AdLib FM card driver.
  3  */
  4 
  5 #include <linux/kernel.h>
  6 #include <linux/module.h>
  7 #include <linux/isa.h>
  8 #include <sound/core.h>
  9 #include <sound/initval.h>
 10 #include <sound/opl3.h>
 11 
 12 #define CRD_NAME "AdLib FM"
 13 #define DEV_NAME "adlib"
 14 
 15 MODULE_DESCRIPTION(CRD_NAME);
 16 MODULE_AUTHOR("Rene Herman");
 17 MODULE_LICENSE("GPL");
 18 
 19 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 20 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 21 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
 22 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
 23 
 24 module_param_array(index, int, NULL, 0444);
 25 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
 26 module_param_array(id, charp, NULL, 0444);
 27 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
 28 module_param_array(enable, bool, NULL, 0444);
 29 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
 30 module_param_array(port, long, NULL, 0444);
 31 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
 32 
 33 static int snd_adlib_match(struct device *dev, unsigned int n)
 34 {
 35         if (!enable[n])
 36                 return 0;
 37 
 38         if (port[n] == SNDRV_AUTO_PORT) {
 39                 dev_err(dev, "please specify port\n");
 40                 return 0;
 41         }
 42         return 1;
 43 }
 44 
 45 static void snd_adlib_free(struct snd_card *card)
 46 {
 47         release_and_free_resource(card->private_data);
 48 }
 49 
 50 static int snd_adlib_probe(struct device *dev, unsigned int n)
 51 {
 52         struct snd_card *card;
 53         struct snd_opl3 *opl3;
 54         int error;
 55 
 56         error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
 57         if (error < 0) {
 58                 dev_err(dev, "could not create card\n");
 59                 return error;
 60         }
 61 
 62         card->private_data = request_region(port[n], 4, CRD_NAME);
 63         if (!card->private_data) {
 64                 dev_err(dev, "could not grab ports\n");
 65                 error = -EBUSY;
 66                 goto out;
 67         }
 68         card->private_free = snd_adlib_free;
 69 
 70         strcpy(card->driver, DEV_NAME);
 71         strcpy(card->shortname, CRD_NAME);
 72         sprintf(card->longname, CRD_NAME " at %#lx", port[n]);
 73 
 74         error = snd_opl3_create(card, port[n], port[n] + 2, OPL3_HW_AUTO, 1, &opl3);
 75         if (error < 0) {
 76                 dev_err(dev, "could not create OPL\n");
 77                 goto out;
 78         }
 79 
 80         error = snd_opl3_hwdep_new(opl3, 0, 0, NULL);
 81         if (error < 0) {
 82                 dev_err(dev, "could not create FM\n");
 83                 goto out;
 84         }
 85 
 86         error = snd_card_register(card);
 87         if (error < 0) {
 88                 dev_err(dev, "could not register card\n");
 89                 goto out;
 90         }
 91 
 92         dev_set_drvdata(dev, card);
 93         return 0;
 94 
 95 out:    snd_card_free(card);
 96         return error;
 97 }
 98 
 99 static int snd_adlib_remove(struct device *dev, unsigned int n)
100 {
101         snd_card_free(dev_get_drvdata(dev));
102         return 0;
103 }
104 
105 static struct isa_driver snd_adlib_driver = {
106         .match          = snd_adlib_match,
107         .probe          = snd_adlib_probe,
108         .remove         = snd_adlib_remove,
109 
110         .driver         = {
111                 .name   = DEV_NAME
112         }
113 };
114 
115 static int __init alsa_card_adlib_init(void)
116 {
117         return isa_register_driver(&snd_adlib_driver, SNDRV_CARDS);
118 }
119 
120 static void __exit alsa_card_adlib_exit(void)
121 {
122         isa_unregister_driver(&snd_adlib_driver);
123 }
124 
125 module_init(alsa_card_adlib_init);
126 module_exit(alsa_card_adlib_exit);
127 

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