path: root/sound/aoa/fabrics/layout.c

/*
 * Apple Onboard Audio driver -- layout fabric
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 *
 *
 * This fabric module looks for sound codecs
 * based on the layout-id property in the device tree.
 *
 */

#include <asm/prom.h>
#include <linux/list.h>
#include <linux/module.h>
#include "../aoa.h"
#include "../soundbus/soundbus.h"

MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Layout-ID fabric for snd-aoa");

#define MAX_CODECS_PER_BUS	2

/* These are the connections the layout fabric
 * knows about. It doesn't really care about the
 * input ones, but I thought I'd separate them
 * to give them proper names. The thing is that
 * Apple usually will distinguish the active output
 * by GPIOs, while the active input is set directly
 * on the codec. Hence we here tell the codec what
 * we think is connected. This information is hard-
 * coded below ... */
#define CC_SPEAKERS	(1<<0)
#define CC_HEADPHONE	(1<<1)
#define CC_LINEOUT	(1<<2)
#define CC_DIGITALOUT	(1<<3)
#define CC_LINEIN	(1<<4)
#define CC_MICROPHONE	(1<<5)
#define CC_DIGITALIN	(1<<6)
/* pretty bogus but users complain...
 * This is a flag saying that the LINEOUT
 * should be renamed to HEADPHONE.
 * be careful with input detection! */
#define CC_LINEOUT_LABELLED_HEADPHONE	(1<<7)

struct codec_connection {
	/* CC_ flags from above */
	int connected;
	/* codec dependent bit to be set in the aoa_codec.connected field.
	 * This intentionally doesn't have any generic flags because the
	 * fabric has to know the codec anyway and all codecs might have
	 * different connectors */
	int codec_bit;
};

struct codec_connect_info {
	char *name;
	struct codec_connection *connections;
};

#define LAYOUT_FLAG_COMBO_LINEOUT_SPDIF	(1<<0)

struct layout {
	unsigned int layout_id;
	struct codec_connect_info codecs[MAX_CODECS_PER_BUS];
	int flags;

	/* if busname is not assigned, we use 'Master' below,
	 * so that our layout table doesn't need to be filled
	 * too much.
	 * We only assign these two if we expect to find more
	 * than one soundbus, i.e. on those machines with
	 * multiple layout-ids */
	char *busname;
	int pcmid;
};

MODULE_ALIAS("sound-layout-36");
MODULE_ALIAS("sound-layout-41");
MODULE_ALIAS("sound-layout-45");
MODULE_ALIAS("sound-layout-47");
MODULE_ALIAS("sound-layout-48");
MODULE_ALIAS("sound-layout-49");
MODULE_ALIAS("sound-layout-50");
MODULE_ALIAS("sound-layout-51");
MODULE_ALIAS("sound-layout-56");
MODULE_ALIAS("sound-layout-57");
MODULE_ALIAS("sound-layout-58");
MODULE_ALIAS("sound-layout-60");
MODULE_ALIAS("sound-layout-61");
MODULE_ALIAS("sound-layout-62");
MODULE_ALIAS("sound-layout-64");
MODULE_ALIAS("sound-layout-65");
MODULE_ALIAS("sound-layout-66");
MODULE_ALIAS("sound-layout-67");
MODULE_ALIAS("sound-layout-68");
MODULE_ALIAS("sound-layout-69");
MODULE_ALIAS("sound-layout-70");
MODULE_ALIAS("sound-layout-72");
MODULE_ALIAS("sound-layout-76");
MODULE_ALIAS("sound-layout-80");
MODULE_ALIAS("sound-layout-82");
MODULE_ALIAS("sound-layout-84");
MODULE_ALIAS("sound-layout-86");
MODULE_ALIAS("sound-layout-90");
MODULE_ALIAS("sound-layout-92");
MODULE_ALIAS("sound-layout-94");
MODULE_ALIAS("sound-layout-96");
MODULE_ALIAS("sound-layout-98");
MODULE_ALIAS("sound-layout-100");

/* onyx with all but microphone connected */
static struct codec_connection onyx_connections_nomic[] = {
	{
		.connected = CC_SPEAKERS | CC_HEADPHONE | CC_LINEOUT,
		.codec_bit = 0,
	},
	{
		.connected = CC_DIGITALOUT,
		.codec_bit = 1,
	},
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{} /* terminate array by .connected == 0 */
};

/* onyx on machines without headphone */
static struct codec_connection onyx_connections_noheadphones[] = {
	{
		.connected = CC_SPEAKERS | CC_LINEOUT |
			     CC_LINEOUT_LABELLED_HEADPHONE,
		.codec_bit = 0,
	},
	{
		.connected = CC_DIGITALOUT,
		.codec_bit = 1,
	},
	/* FIXME: are these correct? probably not for all the machines
	 * below ... If not this will need separating. */
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{
		.connected = CC_MICROPHONE,
		.codec_bit = 3,
	},
	{} /* terminate array by .connected == 0 */
};

/* onyx on machines with real line-out */
static struct codec_connection onyx_connections_reallineout[] = {
	{
		.connected = CC_SPEAKERS | CC_LINEOUT | CC_HEADPHONE,
		.codec_bit = 0,
	},
	{
		.connected = CC_DIGITALOUT,
		.codec_bit = 1,
	},
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{} /* terminate array by .connected == 0 */
};

/* tas on machines without line out */
static struct codec_connection tas_connections_nolineout[] = {
	{
		.connected =