[PATCH] snd-aoa: handle older machines

[Johannes Berg]

This patch changes snd-aoa to handle some older machines that are
currently handled by snd-powermac. snd-aoa has a number of advantages
though, notably it can autoload better and is generally a more modern
driver.

By hardcoding the accepted device-ids (last hunk of the patch) I'm
trying to avoid regressions because this driver will otherwise load
automatically and not let snd-powermac load. People who are unhappy
with snd-powermac and have a device-id property in the device tree
are encouraged to read this patch and make a patch to amend this as
appropriate.

Signed-off-by: Johannes Berg <johannes at sipsolutions.net>
---
 sound/aoa/fabrics/layout.c       |   74 ++++++++++++++++++++++++++++++---------
 sound/aoa/soundbus/i2sbus/core.c |   22 ++++++++---
 2 files changed, 74 insertions(+), 22 deletions(-)

--- wireless-testing.orig/sound/aoa/fabrics/layout.c	2009-01-13 17:01:04.000000000 +0100
+++ wireless-testing/sound/aoa/fabrics/layout.c	2009-01-15 18:15:28.000000000 +0100
@@ -1,16 +1,14 @@
 /*
- * Apple Onboard Audio driver -- layout fabric
+ * Apple Onboard Audio driver -- layout/machine id fabric
  *
- * Copyright 2006 Johannes Berg <johannes at sipsolutions.net>
+ * Copyright 2006-2008 Johannes Berg <johannes at 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.
- *
+ * This fabric module looks for sound codecs based on the
+ * layout-id or device-id property in the device tree.
  */
-
 #include <asm/prom.h>
 #include <linux/list.h>
 #include <linux/module.h>
@@ -63,7 +61,7 @@ struct codec_connect_info {
 #define LAYOUT_FLAG_COMBO_LINEOUT_SPDIF	(1<<0)
 
 struct layout {
-	unsigned int layout_id;
+	unsigned int layout_id, device_id;
 	struct codec_connect_info codecs[MAX_CODECS_PER_BUS];
 	int flags;
 
@@ -111,6 +109,10 @@ MODULE_ALIAS("sound-layout-96");
 MODULE_ALIAS("sound-layout-98");
 MODULE_ALIAS("sound-layout-100");
 
+MODULE_ALIAS("aoa-device-id-14");
+MODULE_ALIAS("aoa-device-id-22");
+MODULE_ALIAS("aoa-device-id-35");
+
 /* onyx with all but microphone connected */
 static struct codec_connection onyx_connections_nomic[] = {
 	{
@@ -518,6 +520,27 @@ static struct layout layouts[] = {
 		.connections = onyx_connections_noheadphones,
 	  },
 	},
+	/* PowerMac3,4 */
+	{ .device_id = 14,
+	  .codecs[0] = {
+		.name = "tas",
+		.connections = tas_connections_noline,
+	  },
+	},
+	/* PowerMac3,6 */
+	{ .device_id = 22,
+	  .codecs[0] = {
+		.name = "tas",
+		.connections = tas_connections_all,
+	  },
+	},
+	/* PowerBook5,2 */
+	{ .device_id = 35,
+	  .codecs[0] = {
+		.name = "tas",
+		.connections = tas_connections_all,
+	  },
+	},
 	{}
 };
 
@@ -526,7 +549,7 @@ static struct layout *find_layout_by_id(
 	struct layout *l;
 
 	l = layouts;
-	while (l->layout_id) {
+	while (l->codecs[0].name) {
 		if (l->layout_id == id)
 			return l;
 		l++;
@@ -534,6 +557,19 @@ static struct layout *find_layout_by_id(
 	return NULL;
 }
 
+static struct layout *find_layout_by_device(unsigned int id)
+{
+	struct layout *l;
+
+	l = layouts;
+	while (l->codecs[0].name) {
+		if (l->device_id == id)
+			return l;
+		l++;
+	}
+	return NULL;
+}
+
 static void use_layout(struct layout *l)
 {
 	int i;
@@ -938,8 +974,8 @@ static struct aoa_fabric layout_fabric =
 static int aoa_fabric_layout_probe(struct soundbus_dev *sdev)
 {
 	struct device_node *sound = NULL;
-	const unsigned int *layout_id;
-	struct layout *layout;
+	const unsigned int *id;
+	struct layout *layout = NULL;
 	struct layout_dev *ldev = NULL;
 	int err;
 
@@ -952,15 +988,18 @@ static int aoa_fabric_layout_probe(struc
 		if (sound->type && strcasecmp(sound->type, "soundchip") == 0)
 			break;
 	}
-	if (!sound) return -ENODEV;
+	if (!sound)
+		return -ENODEV;
 
-	layout_id = of_get_property(sound, "layout-id", NULL);
-	if (!layout_id)
-		goto outnodev;
-	printk(KERN_INFO "snd-aoa-fabric-layout: found bus with layout %d\n",
-	       *layout_id);
+	id = of_get_property(sound, "layout-id", NULL);
+	if (id) {
+		layout = find_layout_by_id(*id);
+	} else {
+		id = of_get_property(sound, "device-id", NULL);
+		if (id)
+			layout = find_layout_by_device(*id);
+	}
 
-	layout = find_layout_by_id(*layout_id);
 	if (!layout) {
 		printk(KERN_ERR "snd-aoa-fabric-layout: unknown layout\n");
 		goto outnodev;
@@ -976,6 +1015,7 @@ static int aoa_fabric_layout_probe(struc
 	ldev->layout = layout;
 	ldev->gpio.node = sound->parent;
 	switch (layout->layout_id) {
+	case 0:  /* anything with device_id, not layout_id */
 	case 41: /* that unknown machine no one seems to have */
 	case 51: /* PowerBook5,4 */
 	case 58: /* Mac Mini */
--- wireless-testing.orig/sound/aoa/soundbus/i2sbus/core.c	2009-01-13 17:01:04.000000000 +0100
+++ wireless-testing/sound/aoa/soundbus/i2sbus/core.c	2009-01-15 18:15:34.000000000 +0100
@@ -1,7 +1,7 @@
 /*
  * i2sbus driver
  *
- * Copyright 2006 Johannes Berg <johannes at sipsolutions.net>
+ * Copyright 2006-2008 Johannes Berg <johannes at sipsolutions.net>
  *
  * GPL v2, can be found in COPYING.
  */
@@ -186,13 +186,25 @@ static int i2sbus_add_dev(struct macio_d
 		}
 	}
 	if (i == 1) {
-		const u32 *layout_id =
-			of_get_property(sound, "layout-id", NULL);
-		if (layout_id) {
-			layout = *layout_id;
+		const u32 *id = of_get_property(sound, "layout-id", NULL);
+
+		if (id) {
+			layout = *id;
 			snprintf(dev->sound.modalias, 32,
 				 "sound-layout-%d", layout);
 			ok = 1;
+		} else {
+			id = of_get_property(sound, "device-id", NULL);
+			/*
+			 * We probably cannot handle all device-id machines,
+			 * so restrict to those we do handle for now.
+			 */
+			if (id && (*id == 22 || *id == 14 || *id == 35)) {
+				snprintf(dev->sound.modalias, 32,
+					 "aoa-device-id-%d", *id);
+				ok = 1;
+				layout = -1;
+			}
 		}
 	}
 	/* for the time being, until we can handle non-layout-id