sound/isa/adlib.c

   1 /*
   2  * AdLib FM card driver.
   3  */
   4
   5 #include <sound/driver.h>
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/platform_device.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 DRV_NAME "snd_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 int 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_array(port, long, NULL, 0444);
  32 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
  33
  34 static struct platform_device *devices[SNDRV_CARDS];
  35
  36 static void snd_adlib_free(struct snd_card *card)
  37 {
  38         release_and_free_resource(card->private_data);
  39 }
  40
  41 static int __devinit snd_adlib_probe(struct platform_device *device)
  42 {
  43         struct snd_card *card;
  44         struct snd_opl3 *opl3;
  45
  46         int error;
  47         int i = device->id;
  48
  49         if (port[i] == SNDRV_AUTO_PORT) {
  50                 snd_printk(KERN_ERR DRV_NAME ": please specify port\n");
  51                 error = -EINVAL;
  52                 goto out0;
  53         }
  54
  55         card = snd_card_new(index[i], id[i], THIS_MODULE, 0);
  56         if (!card) {
  57                 snd_printk(KERN_ERR DRV_NAME ": could not create card\n");
  58                 error = -EINVAL;
  59                 goto out0;
  60         }
  61
  62         card->private_data = request_region(port[i], 4, CRD_NAME);
  63         if (!card->private_data) {
  64                 snd_printk(KERN_ERR DRV_NAME ": could not grab ports\n");
  65                 error = -EBUSY;
  66                 goto out1;
  67         }
  68         card->private_free = snd_adlib_free;
  69
  70         error = snd_opl3_create(card, port[i], port[i] + 2, OPL3_HW_AUTO, 1, &opl3);
  71         if (error < 0) {
  72                 snd_printk(KERN_ERR DRV_NAME ": could not create OPL\n");
  73                 goto out1;
  74         }
  75
  76         error = snd_opl3_hwdep_new(opl3, 0, 0, NULL);
  77         if (error < 0) {
  78                 snd_printk(KERN_ERR DRV_NAME ": could not create FM\n");
  79                 goto out1;
  80         }
  81
  82         strcpy(card->driver, DRV_NAME);
  83         strcpy(card->shortname, CRD_NAME);
  84         sprintf(card->longname, CRD_NAME " at %#lx", port[i]);
  85
  86         snd_card_set_dev(card, &device->dev);
  87
  88         error = snd_card_register(card);
  89         if (error < 0) {
  90                 snd_printk(KERN_ERR DRV_NAME ": could not register card\n");
  91                 goto out1;
  92         }
  93
  94         platform_set_drvdata(device, card);
  95         return 0;
  96
  97 out1:   snd_card_free(card);
  98  out0:  error = -EINVAL; /* FIXME: should be the original error code */
  99         return error;
 100 }
 101
 102 static int __devexit snd_adlib_remove(struct platform_device *device)
 103 {
 104         snd_card_free(platform_get_drvdata(device));
 105         platform_set_drvdata(device, NULL);
 106         return 0;
 107 }
 108
 109 static struct platform_driver snd_adlib_driver = {
 110         .probe          = snd_adlib_probe,
 111         .remove         = __devexit_p(snd_adlib_remove),
 112
 113         .driver         = {
 114                 .name   = DRV_NAME
 115         }
 116 };
 117
 118 static int __init alsa_card_adlib_init(void)
 119 {
 120         int i, cards;
 121
 122         if (platform_driver_register(&snd_adlib_driver) < 0) {
 123                 snd_printk(KERN_ERR DRV_NAME ": could not register driver\n");
 124                 return -ENODEV;
 125         }
 126
 127         for (cards = 0, i = 0; i < SNDRV_CARDS; i++) {
 128                 struct platform_device *device;
 129
 130                 if (!enable[i])
 131                         continue;
 132
 133                 device = platform_device_register_simple(DRV_NAME, i, NULL, 0);
 134                 if (IS_ERR(device))
 135                         continue;
 136
 137                 devices[i] = device;
 138                 cards++;
 139         }
 140
 141         if (!cards) {
 142 #ifdef MODULE
 143                 printk(KERN_ERR CRD_NAME " soundcard not found or device busy\n");
 144 #endif
 145                 platform_driver_unregister(&snd_adlib_driver);
 146                 return -ENODEV;
 147         }
 148         return 0;
 149 }
 150
 151 static void __exit alsa_card_adlib_exit(void)
 152 {
 153         int i;
 154
 155         for (i = 0; i < SNDRV_CARDS; i++)
 156                 platform_device_unregister(devices[i]);
 157         platform_driver_unregister(&snd_adlib_driver);
 158 }
 159
 160 module_init(alsa_card_adlib_init);
 161 module_exit(alsa_card_adlib_exit);