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
snd_adlib_match(struct device * dev,unsigned int n)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
snd_adlib_free(struct snd_card * card)45 static void snd_adlib_free(struct snd_card *card)
46 {
47 release_and_free_resource(card->private_data);
48 }
49
snd_adlib_probe(struct device * dev,unsigned int n)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_create(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 snd_card_set_dev(card, dev);
87
88 error = snd_card_register(card);
89 if (error < 0) {
90 dev_err(dev, "could not register card\n");
91 goto out;
92 }
93
94 dev_set_drvdata(dev, card);
95 return 0;
96
97 out: snd_card_free(card);
98 return error;
99 }
100
snd_adlib_remove(struct device * dev,unsigned int n)101 static int snd_adlib_remove(struct device *dev, unsigned int n)
102 {
103 snd_card_free(dev_get_drvdata(dev));
104 dev_set_drvdata(dev, NULL);
105 return 0;
106 }
107
108 static struct isa_driver snd_adlib_driver = {
109 .match = snd_adlib_match,
110 .probe = snd_adlib_probe,
111 .remove = snd_adlib_remove,
112
113 .driver = {
114 .name = DEV_NAME
115 }
116 };
117
alsa_card_adlib_init(void)118 static int __init alsa_card_adlib_init(void)
119 {
120 return isa_register_driver(&snd_adlib_driver, SNDRV_CARDS);
121 }
122
alsa_card_adlib_exit(void)123 static void __exit alsa_card_adlib_exit(void)
124 {
125 isa_unregister_driver(&snd_adlib_driver);
126 }
127
128 module_init(alsa_card_adlib_init);
129 module_exit(alsa_card_adlib_exit);
130