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); 162