1 /* 2 * Apple Onboard Audio driver for Toonie codec 3 * 4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> 5 * 6 * GPL v2, can be found in COPYING. 7 * 8 * 9 * This is a driver for the toonie codec chip. This chip is present 10 * on the Mac Mini and is nothing but a DAC. 11 */ 12 #include <linux/delay.h> 13 #include <linux/module.h> 14 #include <linux/slab.h> 15 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); 16 MODULE_LICENSE("GPL"); 17 MODULE_DESCRIPTION("toonie codec driver for snd-aoa"); 18 19 #include "../aoa.h" 20 #include "../soundbus/soundbus.h" 21 22 23 #define PFX "snd-aoa-codec-toonie: " 24 25 struct toonie { 26 struct aoa_codec codec; 27 }; 28 #define codec_to_toonie(c) container_of(c, struct toonie, codec) 29 30 static int toonie_dev_register(struct snd_device *dev) 31 { 32 return 0; 33 } 34 35 static struct snd_device_ops ops = { 36 .dev_register = toonie_dev_register, 37 }; 38 39 static struct transfer_info toonie_transfers[] = { 40 /* This thing *only* has analog output, 41 * the rates are taken from Info.plist 42 * from Darwin. */ 43 { 44 .formats = SNDRV_PCM_FMTBIT_S16_BE | 45 SNDRV_PCM_FMTBIT_S24_BE, 46 .rates = SNDRV_PCM_RATE_32000 | 47 SNDRV_PCM_RATE_44100 | 48 SNDRV_PCM_RATE_48000 | 49 SNDRV_PCM_RATE_88200 | 50 SNDRV_PCM_RATE_96000, 51 }, 52 {} 53 }; 54 55 static int toonie_usable(struct codec_info_item *cii, 56 struct transfer_info *ti, 57 struct transfer_info *out) 58 { 59 return 1; 60 } 61 62 #ifdef CONFIG_PM 63 static int toonie_suspend(struct codec_info_item *cii, pm_message_t state) 64 { 65 /* can we turn it off somehow? */ 66 return 0; 67 } 68 69 static int toonie_resume(struct codec_info_item *cii) 70 { 71 return 0; 72 } 73 #endif /* CONFIG_PM */ 74 75 static struct codec_info toonie_codec_info = { 76 .transfers = toonie_transfers, 77 .sysclock_factor = 256, 78 .bus_factor = 64, 79 .owner = THIS_MODULE, 80 .usable = toonie_usable, 81 #ifdef CONFIG_PM 82 .suspend = toonie_suspend, 83 .resume = toonie_resume, 84 #endif 85 }; 86 87 static int toonie_init_codec(struct aoa_codec *codec) 88 { 89 struct toonie *toonie = codec_to_toonie(codec); 90 91 /* nothing connected? what a joke! */ 92 if (toonie->codec.connected != 1) 93 return -ENOTCONN; 94 95 if (aoa_snd_device_new(SNDRV_DEV_CODEC, toonie, &ops)) { 96 printk(KERN_ERR PFX "failed to create toonie snd device!\n"); 97 return -ENODEV; 98 } 99 100 if (toonie->codec.soundbus_dev->attach_codec(toonie->codec.soundbus_dev, 101 aoa_get_card(), 102 &toonie_codec_info, toonie)) { 103 printk(KERN_ERR PFX "error creating toonie pcm\n"); 104 snd_device_free(aoa_get_card(), toonie); 105 return -ENODEV; 106 } 107 108 return 0; 109 } 110 111 static void toonie_exit_codec(struct aoa_codec *codec) 112 { 113 struct toonie *toonie = codec_to_toonie(codec); 114 115 if (!toonie->codec.soundbus_dev) { 116 printk(KERN_ERR PFX "toonie_exit_codec called without soundbus_dev!\n"); 117 return; 118 } 119 toonie->codec.soundbus_dev->detach_codec(toonie->codec.soundbus_dev, toonie); 120 } 121 122 static struct toonie *toonie; 123 124 static int __init toonie_init(void) 125 { 126 toonie = kzalloc(sizeof(struct toonie), GFP_KERNEL); 127 128 if (!toonie) 129 return -ENOMEM; 130 131 strlcpy(toonie->codec.name, "toonie", sizeof(toonie->codec.name)); 132 toonie->codec.owner = THIS_MODULE; 133 toonie->codec.init = toonie_init_codec; 134 toonie->codec.exit = toonie_exit_codec; 135 136 if (aoa_codec_register(&toonie->codec)) { 137 kfree(toonie); 138 return -EINVAL; 139 } 140 141 return 0; 142 } 143 144 static void __exit toonie_exit(void) 145 { 146 aoa_codec_unregister(&toonie->codec); 147 kfree(toonie); 148 } 149 150 module_init(toonie_init); 151 module_exit(toonie_exit); 152