snd-aoa-fabric-layout.c

linux 内核源代码

/*
 * Apple Onboard Audio driver -- layout fabric
 *
 * Copyright 2006 Johannes Berg <[e-mail]>
 *
 * 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 <[e-mail]>");
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 = CC_SPEAKERS | CC_HEADPHONE,
		.codec_bit = 0,
	},
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{
		.connected = CC_MICROPHONE,
		.codec_bit = 3,
	},
	{} /* terminate array by .connected == 0 */
};

/* tas on machines with neither line out nor line in */
static struct codec_connection tas_connections_noline[] = {
	{
		.connected = CC_SPEAKERS | CC_HEADPHONE,
		.codec_bit = 0,
	},
	{
		.connected = CC_MICROPHONE,
		.codec_bit = 3,
	},
	{} /* terminate array by .connected == 0 */
};

/* tas on machines without microphone */
static struct codec_connection tas_connections_nomic[] = {
	{
		.connected = CC_SPEAKERS | CC_HEADPHONE | CC_LINEOUT,
		.codec_bit = 0,
	},
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{} /* terminate array by .connected == 0 */
};

/* tas on machines with everything connected */
static struct codec_connection tas_connections_all[] = {
	{
		.connected = CC_SPEAKERS | CC_HEADPHONE | CC_LINEOUT,
		.codec_bit = 0,
	},
	{
		.connected = CC_LINEIN,
		.codec_bit = 2,
	},
	{
		.connected = CC_MICROPHONE,
		.codec_bit = 3,
	},
	{} /* terminate array by .connected == 0 */
};

static struct codec_connection toonie_connections[] = {
	{
		.connected = CC_SPEAKERS | CC_HEADPHONE,
		.codec_bit = 0,
	},
	{} /* terminate array by .connected == 0 */
};

static struct codec_connection topaz_input[] = {
	{
		.connected = CC_DIGITALIN,
		.codec_bit = 0,
	},
	{} /* terminate array by .connected == 0 */
};

static struct codec_connection topaz_output[] = {
	{
		.connected = CC_DIGITALOUT,
		.codec_bit = 1,
	},
	{} /* terminate array by .connected == 0 */
};

static struct codec_connection topaz_inout[] = {
	{
		.connected = CC_DIGITALIN,
		.codec_bit = 0,
	},
	{
		.connected = CC_DIGITALOUT,
		.codec_bit = 1,
	},
	{} /* terminate array by .connected == 0 */
};

static struct layout layouts[] = {
	/* last PowerBooks (15" Oct 2005) */
	{ .layout_id = 82,
	  .flags = LAYOUT_FLAG_COMBO_LINEOUT_SPDIF,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* PowerMac9,1 */
	{ .layout_id = 60,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_reallineout,
	  },
	},
	/* PowerMac9,1 */
	{ .layout_id = 61,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* PowerBook5,7 */
	{ .layout_id = 64,
	  .flags = LAYOUT_FLAG_COMBO_LINEOUT_SPDIF,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	},
	/* PowerBook5,7 */
	{ .layout_id = 65,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* PowerBook5,9 [17" Oct 2005] */
	{ .layout_id = 84,
	  .flags = LAYOUT_FLAG_COMBO_LINEOUT_SPDIF,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* PowerMac8,1 */
	{ .layout_id = 45,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* Quad PowerMac (analog in, analog/digital out) */
	{ .layout_id = 68,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_nomic,
	  },
	},
	/* Quad PowerMac (digital in) */
	{ .layout_id = 69,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	  .busname = "digital in", .pcmid = 1 },
	/* Early 2005 PowerBook (PowerBook 5,6) */
	{ .layout_id = 70,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nolineout,
	  },
	},
	/* PowerBook 5,4 */
	{ .layout_id = 51,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nolineout,
	  },
	},
	/* PowerBook6,7 */
	{ .layout_id = 80,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_noline,
	  },
	},
	/* PowerBook6,8 */
	{ .layout_id = 72,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nolineout,
	  },
	},
	/* PowerMac8,2 */
	{ .layout_id = 86,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_nomic,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	/* PowerBook6,7 */
	{ .layout_id = 92,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nolineout,
	  },
	},
	/* PowerMac10,1 (Mac Mini) */
	{ .layout_id = 58,
	  .codecs[0] = {
		.name = "toonie",
		.connections = toonie_connections,
	  },
	},
	{
	  .layout_id = 96,
	  .codecs[0] = {
	  	.name = "onyx",
	  	.connections = onyx_connections_noheadphones,
	  },
	},
	/* unknown, untested, but this comes from Apple */
	{ .layout_id = 41,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_all,
	  },
	},
	{ .layout_id = 36,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nomic,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_inout,
	  },
	},
	{ .layout_id = 47,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	},
	{ .layout_id = 48,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	{ .layout_id = 49,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_nomic,
	  },
	},
	{ .layout_id = 50,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	{ .layout_id = 56,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	},
	{ .layout_id = 57,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	{ .layout_id = 62,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_output,
	  },
	},
	{ .layout_id = 66,
	  .codecs[0] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	},
	{ .layout_id = 67,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	},
	{ .layout_id = 76,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_nomic,
	  },
	  .codecs[1] = {
		.name = "topaz",
		.connections = topaz_inout,
	  },
	},
	{ .layout_id = 90,
	  .codecs[0] = {
		.name = "tas",
		.connections = tas_connections_noline,
	  },
	},
	{ .layout_id = 94,
	  .codecs[0] = {
		.name = "onyx",
		/* but it has an external mic?? how to select? */
		.connections = onyx_connections_noheadphones,
	  },
	},
	{ .layout_id = 98,
	  .codecs[0] = {
		.name = "toonie",
		.connections = toonie_connections,
	  },
	},
	{ .layout_id = 100,
	  .codecs[0] = {
		.name = "topaz",
		.connections = topaz_input,
	  },
	  .codecs[1] = {
		.name = "onyx",
		.connections = onyx_connections_noheadphones,
	  },
	},
	{}
};

static struct layout *find_layout_by_id(unsigned int id)
{
	struct layout *l;

	l = layouts;
	while (l->layout_id) {
		if (l->layout_id == id)
			return l;
		l++;
	}
	return NULL;
}

static void use_layout(struct layout *l)
{
	int i;

	for (i=0; i<MAX_CODECS_PER_BUS; i++) {
		if (l->codecs[i].name) {
			request_module("snd-aoa-codec-%s", l->codecs[i].name);
		}
	}
	/* now we wait for the codecs to call us back */
}

struct layout_dev;

struct layout_dev_ptr {
	struct layout_dev *ptr;
};

struct layout_dev {
	struct list_head list;
	struct soundbus_dev *sdev;
	struct device_node *sound;
	struct aoa_codec *codecs[MAX_CODECS_PER_BUS];
	struct layout *layout;
	struct gpio_runtime gpio;