/*
 * Apple Onboard Audio driver -- layout/machine id fabric
 *
 * 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 or device-id property in the device tree.
 */
#include <asm/prom.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.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, device_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");

MODULE_ALIAS("aoa-device-id-14");
MODULE_ALIAS("aoa-device-id-22");
MODULE_ALIAS("aoa-device-id-35");
MODULE_ALIAS("aoa-device-id-44");

/* 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,
          },
        },
        /* PowerBook6,5 */
        { .device_id = 44,
          .codecs[0] = {
                .name = "tas",
                .connections = tas_connections_all,
          },
        },
        /* 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,
          },
        },
        /* 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,
          },
        },
        {}
};

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

        l = layouts;
        while (l->codecs[0].name) {
                if (l->layout_id == id)
                        return l;
                l++;
        }
        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;

        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;

        /* we need these for headphone/lineout detection */
        struct snd_kcontrol *headphone_ctrl;
        struct snd_kcontrol *lineout_ctrl;
        struct snd_kcontrol *speaker_ctrl;
        struct snd_kcontrol *master_ctrl;
        struct snd_kcontrol *headphone_detected_ctrl;
        struct snd_kcontrol *lineout_detected_ctrl;

        struct layout_dev_ptr selfptr_headphone;
        struct layout_dev_ptr selfptr_lineout;

        u32 have_lineout_detect:1,
            have_headphone_detect:1,
            switch_on_headphone:1,
            switch_on_lineout:1;
};

static LIST_HEAD(layouts_list);
static int layouts_list_items;
/* this can go away but only if we allow multiple cards,
 * make the fabric handle all the card stuff, etc... */
static struct layout_dev *layout_device;

#define control_info    snd_ctl_boolean_mono_info

#define AMP_CONTROL(n, description)                                     \
static int n##_control_get(struct snd_kcontrol *kcontrol,               \
                           struct snd_ctl_elem_value *ucontrol)         \
{                                                                       \
        struct gpio_runtime *gpio = snd_kcontrol_chip(kcontrol);        \
        if (gpio->methods && gpio->methods->get_##n)                    \
                ucontrol->value.integer.value[0] =                      \
                        gpio->methods->get_##n(gpio);                   \
        return 0;                                                       \
}                                                                       \
static int n##_control_put(struct snd_kcontrol *kcontrol,               \
                           struct snd_ctl_elem_value *ucontrol)         \
{                                                                       \
        struct gpio_runtime *gpio = snd_kcontrol_chip(kcontrol);        \
        if (gpio->methods && gpio->methods->get_##n)                    \
                gpio->methods->set_##n(gpio,                            \
                        !!ucontrol->value.integer.value[0]);            \
        return 1;                                                       \
}                                                                       \
static struct snd_kcontrol_new n##_ctl = {                              \
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,                            \
        .name = description,                                            \
        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,                      \
        .info = control_info,                                           \
        .get = n##_control_get,                                         \
        .put = n##_control_put,                                         \
}

AMP_CONTROL(headphone, "Headphone Switch");
AMP_CONTROL(speakers, "Speakers Switch");
AMP_CONTROL(lineout, "Line-Out Switch");
AMP_CONTROL(master, "Master Switch");

static int detect_choice_get(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct layout_dev *ldev = snd_kcontrol_chip(kcontrol);

        switch (kcontrol->private_value) {
        case 0:
                ucontrol->value.integer.value[0] = ldev->switch_on_headphone;
                break;
        case 1:
                ucontrol->value.integer.value[0] = ldev->switch_on_lineout;
                break;
        default:
                return -ENODEV;
        }
        return 0;
}

static int detect_choice_put(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct layout_dev *ldev = snd_kcontrol_chip(kcontrol);

        switch (kcontrol->private_value) {
        case 0:
                ldev->switch_on_headphone = !!ucontrol->value.integer.value[0];
                break;
        case 1:
                ldev->switch_on_lineout = !!ucontrol->value.integer.value[0];
                break;
        default:
                return -ENODEV;
        }
        return 1;
}

static struct snd_kcontrol_new headphone_detect_choice = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Headphone Detect Autoswitch",
        .info = control_info,
        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
        .get = detect_choice_get,
        .put = detect_choice_put,
        .private_value = 0,
};

static struct snd_kcontrol_new lineout_detect_choice = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Line-Out Detect Autoswitch",
        .info = control_info,
        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
        .get = detect_choice_get,
        .put = detect_choice_put,
        .private_value = 1,
};

static int detected_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct layout_dev *ldev = snd_kcontrol_chip(kcontrol);
        int v;

        switch (kcontrol->private_value) {
        case 0:
                v = ldev->gpio.methods->get_detect(&ldev->gpio,
                                                   AOA_NOTIFY_HEADPHONE);
                break;
        case 1:
                v = ldev->gpio.methods->get_detect(&ldev->gpio,
                                                   AOA_NOTIFY_LINE_OUT);
                break;
        default:
                return -ENODEV;
        }
        ucontrol->value.integer.value[0] = v;
        return 0;
}

static struct snd_kcontrol_new headphone_detected = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Headphone Detected",
        .info = control_info,
        .access = SNDRV_CTL_ELEM_ACCESS_READ,
        .get = detected_get,
        .private_value = 0,
};

static struct snd_kcontrol_new lineout_detected = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Line-Out Detected",
        .info = control_info,
        .access = SNDRV_CTL_ELEM_ACCESS_READ,
        .get = detected_get,
        .private_value = 1,
};

static int check_codec(struct aoa_codec *codec,
                       struct layout_dev *ldev,
                       struct codec_connect_info *cci)
{
        const u32 *ref;
        char propname[32];
        struct codec_connection *cc;

        /* if the codec has a 'codec' node, we require a reference */
        if (codec->node && (strcmp(codec->node->name, "codec") == 0)) {
                snprintf(propname, sizeof(propname),
                         "platform-%s-codec-ref", codec->name);
                ref = of_get_property(ldev->sound, propname, NULL);
                if (!ref) {
                        printk(KERN_INFO "snd-aoa-fabric-layout: "
                                "required property %s not present\n", propname);
                        return -ENODEV;
                }
                if (*ref != codec->node->phandle) {
                        printk(KERN_INFO "snd-aoa-fabric-layout: "
                                "%s doesn't match!\n", propname);
                        return -ENODEV;
                }
        } else {
                if (layouts_list_items != 1) {
                        printk(KERN_INFO "snd-aoa-fabric-layout: "
                                "more than one soundbus, but no references.\n");
                        return -ENODEV;
                }
        }
        codec->soundbus_dev = ldev->sdev;
        codec->gpio = &ldev->gpio;

        cc = cci->connections;
        if (!cc)
                return -EINVAL;

        printk(KERN_INFO "snd-aoa-fabric-layout: can use this codec\n");

        codec->connected = 0;
        codec->fabric_data = cc;

        while (cc->connected) {
                codec->connected |= 1<<cc->codec_bit;
                cc++;
        }

        return 0;
}

static int layout_found_codec(struct aoa_codec *codec)
{
        struct layout_dev *ldev;
        int i;

        list_for_each_entry(ldev, &layouts_list, list) {
                for (i=0; i<MAX_CODECS_PER_BUS; i++) {
                        if (!ldev->layout->codecs[i].name)
                                continue;
                        if (strcmp(ldev->layout->codecs[i].name, codec->name) == 0) {
                                if (check_codec(codec,
                                                ldev,
                                                &ldev->layout->codecs[i]) == 0)
                                        return 0;
                        }
                }
        }
        return -ENODEV;
}

static void layout_remove_codec(struct aoa_codec *codec)
{
        int i;
        /* here remove the codec from the layout dev's
         * codec reference */

        codec->soundbus_dev = NULL;
        codec->gpio = NULL;
        for (i=0; i<MAX_CODECS_PER_BUS; i++) {
        }
}

static void layout_notify(void *data)
{
        struct layout_dev_ptr *dptr = data;
        struct layout_dev *ldev;
        int v, update;
        struct snd_kcontrol *detected, *c;
        struct snd_card *card = aoa_get_card();

        ldev = dptr->ptr;
        if (data == &ldev->selfptr_headphone) {
                v = ldev->gpio.methods->get_detect(&ldev->gpio, AOA_NOTIFY_HEADPHONE);
                detected = ldev->headphone_detected_ctrl;
                update = ldev->switch_on_headphone;
                if (update) {
                        ldev->gpio.methods->set_speakers(&ldev->gpio, !v);
                        ldev->gpio.methods->set_headphone(&ldev->gpio, v);
                        ldev->gpio.methods->set_lineout(&ldev->gpio, 0);
                }
        } else if (data == &ldev->selfptr_lineout) {
                v = ldev->gpio.methods->get_detect(&ldev->gpio, AOA_NOTIFY_LINE_OUT);
                detected = ldev->lineout_detected_ctrl;
                update = ldev->switch_on_lineout;
                if (update) {
                        ldev->gpio.methods->set_speakers(&ldev->gpio, !v);
                        ldev->gpio.methods->set_headphone(&ldev->gpio, 0);
                        ldev->gpio.methods->set_lineout(&ldev->gpio, v);
                }
        } else
                return;

        if (detected)
                snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &detected->id);
        if (update) {
                c = ldev->headphone_ctrl;
                if (c)
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &c->id);
                c = ldev->speaker_ctrl;
                if (c)
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &c->id);
                c = ldev->lineout_ctrl;
                if (c)
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &c->id);
        }
}

static void layout_attached_codec(struct aoa_codec *codec)
{
        struct codec_connection *cc;
        struct snd_kcontrol *ctl;
        int headphones, lineout;
        struct layout_dev *ldev = layout_device;

        /* need to add this codec to our codec array! */

        cc = codec->fabric_data;

        headphones = codec->gpio->methods->get_detect(codec->gpio,
                                                      AOA_NOTIFY_HEADPHONE);
        lineout = codec->gpio->methods->get_detect(codec->gpio,
                                                   AOA_NOTIFY_LINE_OUT);

        if (codec->gpio->methods->set_master) {
                ctl = snd_ctl_new1(&master_ctl, codec->gpio);
                ldev->master_ctrl = ctl;
                aoa_snd_ctl_add(ctl);
        }
        while (cc->connected) {
                if (cc->connected & CC_SPEAKERS) {
                        if (headphones <= 0 && lineout <= 0)
                                ldev->gpio.methods->set_speakers(codec->gpio, 1);
                        ctl = snd_ctl_new1(&speakers_ctl, codec->gpio);
                        ldev->speaker_ctrl = ctl;
                        aoa_snd_ctl_add(ctl);
                }
                if (cc->connected & CC_HEADPHONE) {
                        if (headphones == 1)
                                ldev->gpio.methods->set_headphone(codec->gpio, 1);
                        ctl = snd_ctl_new1(&headphone_ctl, codec->gpio);
                        ldev->headphone_ctrl = ctl;
                        aoa_snd_ctl_add(ctl);
                        ldev->have_headphone_detect =
                                !ldev->gpio.methods
                                        ->set_notify(&ldev->gpio,
                                                     AOA_NOTIFY_HEADPHONE,
                                                     layout_notify,
                                                     &ldev->selfptr_headphone);
                        if (ldev->have_headphone_detect) {
                                ctl = snd_ctl_new1(&headphone_detect_choice,
                                                   ldev);
                                aoa_snd_ctl_add(ctl);
                                ctl = snd_ctl_new1(&headphone_detected,
                                                   ldev);
                                ldev->headphone_detected_ctrl = ctl;
                                aoa_snd_ctl_add(ctl);
                        }
                }
                if (cc->connected & CC_LINEOUT) {
                        if (lineout == 1)
                                ldev->gpio.methods->set_lineout(codec->gpio, 1);
                        ctl = snd_ctl_new1(&lineout_ctl, codec->gpio);
                        if (cc->connected & CC_LINEOUT_LABELLED_HEADPHONE)
                                strlcpy(ctl->id.name,
                                        "Headphone Switch", sizeof(ctl->id.name));
                        ldev->lineout_ctrl = ctl;
                        aoa_snd_ctl_add(ctl);
                        ldev->have_lineout_detect =
                                !ldev->gpio.methods
                                        ->set_notify(&ldev->gpio,
                                                     AOA_NOTIFY_LINE_OUT,
                                                     layout_notify,
                                                     &ldev->selfptr_lineout);
                        if (ldev->have_lineout_detect) {
                                ctl = snd_ctl_new1(&lineout_detect_choice,
                                                   ldev);
                                if (cc->connected & CC_LINEOUT_LABELLED_HEADPHONE)
                                        strlcpy(ctl->id.name,
                                                "Headphone Detect Autoswitch",
                                                sizeof(ctl->id.name));
                                aoa_snd_ctl_add(ctl);
                                ctl = snd_ctl_new1(&lineout_detected,
                                                   ldev);
                                if (cc->connected & CC_LINEOUT_LABELLED_HEADPHONE)
                                        strlcpy(ctl->id.name,
                                                "Headphone Detected",
                                                sizeof(ctl->id.name));
                                ldev->lineout_detected_ctrl = ctl;
                                aoa_snd_ctl_add(ctl);
                        }
                }
                cc++;
        }
        /* now update initial state */
        if (ldev->have_headphone_detect)
                layout_notify(&ldev->selfptr_headphone);
        if (ldev->have_lineout_detect)
                layout_notify(&ldev->selfptr_lineout);
}

static struct aoa_fabric layout_fabric = {
        .name = "SoundByLayout",
        .owner = THIS_MODULE,
        .found_codec = layout_found_codec,
        .remove_codec = layout_remove_codec,
        .attached_codec = layout_attached_codec,
};

static int aoa_fabric_layout_probe(struct soundbus_dev *sdev)
{
        struct device_node *sound = NULL;
        const unsigned int *id;
        struct layout *layout = NULL;
        struct layout_dev *ldev = NULL;
        int err;

        /* hm, currently we can only have one ... */
        if (layout_device)
                return -ENODEV;

        /* by breaking out we keep a reference */
        while ((sound = of_get_next_child(sdev->ofdev.dev.of_node, sound))) {
                if (sound->type && strcasecmp(sound->type, "soundchip") == 0)
                        break;
        }
        if (!sound)
                return -ENODEV;

        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);
        }

        if (!layout) {
                printk(KERN_ERR "snd-aoa-fabric-layout: unknown layout\n");
                goto outnodev;
        }

        ldev = kzalloc(sizeof(struct layout_dev), GFP_KERNEL);
        if (!ldev)
                goto outnodev;

        layout_device = ldev;
        ldev->sdev = sdev;
        ldev->sound = sound;
        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 */
                ldev->gpio.methods = ftr_gpio_methods;
                printk(KERN_DEBUG
                       "snd-aoa-fabric-layout: Using direct GPIOs\n");
                break;
        default:
                ldev->gpio.methods = pmf_gpio_methods;
                printk(KERN_DEBUG
                       "snd-aoa-fabric-layout: Using PMF GPIOs\n");
        }
        ldev->selfptr_headphone.ptr = ldev;
        ldev->selfptr_lineout.ptr = ldev;
        dev_set_drvdata(&sdev->ofdev.dev, ldev);
        list_add(&ldev->list, &layouts_list);
        layouts_list_items++;

        /* assign these before registering ourselves, so
         * callbacks that are done during registration
         * already have the values */
        sdev->pcmid = ldev->layout->pcmid;
        if (ldev->layout->busname) {
                sdev->pcmname = ldev->layout->busname;
        } else {
                sdev->pcmname = "Master";
        }

        ldev->gpio.methods->init(&ldev->gpio);

        err = aoa_fabric_register(&layout_fabric, &sdev->ofdev.dev);
        if (err && err != -EALREADY) {
                printk(KERN_INFO "snd-aoa-fabric-layout: can't use,"
                                 " another fabric is active!\n");
                goto outlistdel;
        }

        use_layout(layout);
        ldev->switch_on_headphone = 1;
        ldev->switch_on_lineout = 1;
        return 0;
 outlistdel:
        /* we won't be using these then... */
        ldev->gpio.methods->exit(&ldev->gpio);
        /* reset if we didn't use it */
        sdev->pcmname = NULL;
        sdev->pcmid = -1;
        list_del(&ldev->list);
        layouts_list_items--;
        kfree(ldev);
 outnodev:
        of_node_put(sound);
        layout_device = NULL;
        return -ENODEV;
}

static int aoa_fabric_layout_remove(struct soundbus_dev *sdev)
{
        struct layout_dev *ldev = dev_get_drvdata(&sdev->ofdev.dev);
        int i;

        for (i=0; i<MAX_CODECS_PER_BUS; i++) {
                if (ldev->codecs[i]) {
                        aoa_fabric_unlink_codec(ldev->codecs[i]);
                }
                ldev->codecs[i] = NULL;
        }
        list_del(&ldev->list);
        layouts_list_items--;
        of_node_put(ldev->sound);

        ldev->gpio.methods->set_notify(&ldev->gpio,
                                       AOA_NOTIFY_HEADPHONE,
                                       NULL,
                                       NULL);
        ldev->gpio.methods->set_notify(&ldev->gpio,
                                       AOA_NOTIFY_LINE_OUT,
                                       NULL,
                                       NULL);

        ldev->gpio.methods->exit(&ldev->gpio);
        layout_device = NULL;
        kfree(ldev);
        sdev->pcmid = -1;
        sdev->pcmname = NULL;
        return 0;
}

#ifdef CONFIG_PM
static int aoa_fabric_layout_suspend(struct soundbus_dev *sdev, pm_message_t state)
{
        struct layout_dev *ldev = dev_get_drvdata(&sdev->ofdev.dev);

        if (ldev->gpio.methods && ldev->gpio.methods->all_amps_off)
                ldev->gpio.methods->all_amps_off(&ldev->gpio);

        return 0;
}

static int aoa_fabric_layout_resume(struct soundbus_dev *sdev)
{
        struct layout_dev *ldev = dev_get_drvdata(&sdev->ofdev.dev);

        if (ldev->gpio.methods && ldev->gpio.methods->all_amps_off)
                ldev->gpio.methods->all_amps_restore(&ldev->gpio);

        return 0;
}
#endif

static struct soundbus_driver aoa_soundbus_driver = {
        .name = "snd_aoa_soundbus_drv",
        .owner = THIS_MODULE,
        .probe = aoa_fabric_layout_probe,
        .remove = aoa_fabric_layout_remove,
#ifdef CONFIG_PM
        .suspend = aoa_fabric_layout_suspend,
        .resume = aoa_fabric_layout_resume,
#endif
        .driver = {
                .owner = THIS_MODULE,
        }
};

static int __init aoa_fabric_layout_init(void)
{
        int err;

        err = soundbus_register_driver(&aoa_soundbus_driver);
        if (err)
                return err;
        return 0;
}

static void __exit aoa_fabric_layout_exit(void)
{
        soundbus_unregister_driver(&aoa_soundbus_driver);
        aoa_fabric_unregister(&layout_fabric);
}

module_init(aoa_fabric_layout_init);
module_exit(aoa_fabric_layout_exit);