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, i = device->id; 47 48 if (port[i] == SNDRV_AUTO_PORT) { 49 snd_printk(KERN_ERR DRV_NAME ": please specify port\n"); 50 error = -EINVAL; 51 goto out0; 52 } 53 54 card = snd_card_new(index[i], id[i], THIS_MODULE, 0); 55 if (!card) { 56 snd_printk(KERN_ERR DRV_NAME ": could not create card\n"); 57 error = -EINVAL; 58 goto out0; 59 } 60 61 card->private_data = request_region(port[i], 4, CRD_NAME); 62 if (!card->private_data) { 63 snd_printk(KERN_ERR DRV_NAME ": could not grab ports\n"); 64 error = -EBUSY; 65 goto out1; 66 } 67 card->private_free = snd_adlib_free; 68 69 error = snd_opl3_create(card, port[i], port[i] + 2, OPL3_HW_AUTO, 1, &opl3); 70 if (error < 0) { 71 snd_printk(KERN_ERR DRV_NAME ": could not create OPL\n"); 72 goto out1; 73 } 74 75 error = snd_opl3_hwdep_new(opl3, 0, 0, NULL); 76 if (error < 0) { 77 snd_printk(KERN_ERR DRV_NAME ": could not create FM\n"); 78 goto out1; 79 } 80 81 strcpy(card->driver, DRV_NAME); 82 strcpy(card->shortname, CRD_NAME); 83 sprintf(card->longname, CRD_NAME " at %#lx", port[i]); 84 85 snd_card_set_dev(card, &device->dev); 86 87 error = snd_card_register(card); 88 if (error < 0) { 89 snd_printk(KERN_ERR DRV_NAME ": could not register card\n"); 90 goto out1; 91 } 92 93 platform_set_drvdata(device, card); 94 return 0; 95 96 out1: snd_card_free(card); 97 out0: return error; 98 } 99 100 static int __devexit snd_adlib_remove(struct platform_device *device) 101 { 102 snd_card_free(platform_get_drvdata(device)); 103 platform_set_drvdata(device, NULL); 104 return 0; 105 } 106 107 static struct platform_driver snd_adlib_driver = { 108 .probe = snd_adlib_probe, 109 .remove = __devexit_p(snd_adlib_remove), 110 111 .driver = { 112 .name = DRV_NAME 113 } 114 }; 115 116 static int __init alsa_card_adlib_init(void) 117 { 118 int i, cards; 119 120 if (platform_driver_register(&snd_adlib_driver) < 0) { 121 snd_printk(KERN_ERR DRV_NAME ": could not register driver\n"); 122 return -ENODEV; 123 } 124 125 for (cards = 0, i = 0; i < SNDRV_CARDS; i++) { 126 struct platform_device *device; 127 128 if (!enable[i]) 129 continue; 130 131 device = platform_device_register_simple(DRV_NAME, i, NULL, 0); 132 if (IS_ERR(device)) 133 continue; 134 135 if (!platform_get_drvdata(device)) { 136 platform_device_unregister(device); 137 continue; 138 } 139 140 devices[i] = device; 141 cards++; 142 } 143 144 if (!cards) { 145 #ifdef MODULE 146 printk(KERN_ERR CRD_NAME " soundcard not found or device busy\n"); 147 #endif 148 platform_driver_unregister(&snd_adlib_driver); 149 return -ENODEV; 150 } 151 return 0; 152 } 153 154 static void __exit alsa_card_adlib_exit(void) 155 { 156 int i; 157 158 for (i = 0; i < SNDRV_CARDS; i++) 159 platform_device_unregister(devices[i]); 160 platform_driver_unregister(&snd_adlib_driver); 161 } 162 163 module_init(alsa_card_adlib_init); 164 module_exit(alsa_card_adlib_exit); 165