snd-aoa: handle older machines

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@sipsolutions.net>
---
 sound/aoa/fabrics/layout.c       |   74 ++++++++++++++++++++++++++++++---------
 sound/aoa/soundbus/i2sbus/core.c |   22 ++++++++---
 2 files changed, 74 insertions(+), 22 deletions(-)

At Thu, 15 Jan 2009 18:21:48 +0100,
Johannes Berg wrote:
> 
> 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@sipsolutions.net>

Applied both patches now.
Thanks!


Takashi


> ---
>  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@sipsolutions.net>
> + * Copyright 2006-2008 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.
> - *
> + * 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@sipsolutions.net>
> + * Copyright 2006-2008 Johannes Berg <johannes@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
> 
>