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>
 15MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
 16MODULE_LICENSE("GPL");
 17MODULE_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
 25struct toonie {
 26	struct aoa_codec	codec;
 27};
 28#define codec_to_toonie(c) container_of(c, struct toonie, codec)
 29
 30static int toonie_dev_register(struct snd_device *dev)
 31{
 32	return 0;
 33}
 34
 35static struct snd_device_ops ops = {
 36	.dev_register = toonie_dev_register,
 37};
 38
 39static 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
 55static 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
 63static 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
 69static int toonie_resume(struct codec_info_item *cii)
 70{
 71	return 0;
 72}
 73#endif /* CONFIG_PM */
 74
 75static 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
 87static 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_LOWLEVEL, 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
111static 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
122static struct toonie *toonie;
123
124static 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
144static void __exit toonie_exit(void)
145{
146	aoa_codec_unregister(&toonie->codec);
147	kfree(toonie);
148}
149
150module_init(toonie_init);
151module_exit(toonie_exit);