[deliverable/linux.git] / sound / pci / hda / hda_codec.c

/*
 * Universal Interface for Intel High Definition Audio Codec
 *
 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
 *
 *
 *  This driver is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This driver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/async.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include "hda_codec.h"
#include <sound/asoundef.h>
#include <sound/tlv.h>
#include <sound/initval.h>
#include <sound/jack.h>
#include "hda_local.h"
#include "hda_beep.h"
#include "hda_jack.h"
#include <sound/hda_hwdep.h>

#ifdef CONFIG_PM
#define codec_in_pm(codec)      atomic_read(&(codec)->core.in_pm)
#define hda_codec_is_power_on(codec) \
        (!pm_runtime_suspended(hda_codec_dev(codec)))
#else
#define codec_in_pm(codec)      0
#define hda_codec_is_power_on(codec)    1
#endif

#define codec_has_epss(codec) \
        ((codec)->core.power_caps & AC_PWRST_EPSS)
#define codec_has_clkstop(codec) \
        ((codec)->core.power_caps & AC_PWRST_CLKSTOP)

/**
 * snd_hda_get_jack_location - Give a location string of the jack
 * @cfg: pin default config value
 *
 * Parse the pin default config value and returns the string of the
 * jack location, e.g. "Rear", "Front", etc.
 */
const char *snd_hda_get_jack_location(u32 cfg)
{
        static char *bases[7] = {
                "N/A", "Rear", "Front", "Left", "Right", "Top", "Bottom",
        };
        static unsigned char specials_idx[] = {
                0x07, 0x08,
                0x17, 0x18, 0x19,
                0x37, 0x38
        };
        static char *specials[] = {
                "Rear Panel", "Drive Bar",
                "Riser", "HDMI", "ATAPI",
                "Mobile-In", "Mobile-Out"
        };
        int i;
        cfg = (cfg & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT;
        if ((cfg & 0x0f) < 7)
                return bases[cfg & 0x0f];
        for (i = 0; i < ARRAY_SIZE(specials_idx); i++) {
                if (cfg == specials_idx[i])
                        return specials[i];
        }
        return "UNKNOWN";
}
EXPORT_SYMBOL_GPL(snd_hda_get_jack_location);

/**
 * snd_hda_get_jack_connectivity - Give a connectivity string of the jack
 * @cfg: pin default config value
 *
 * Parse the pin default config value and returns the string of the
 * jack connectivity, i.e. external or internal connection.
 */
const char *snd_hda_get_jack_connectivity(u32 cfg)
{
        static char *jack_locations[4] = { "Ext", "Int", "Sep", "Oth" };

        return jack_locations[(cfg >> (AC_DEFCFG_LOCATION_SHIFT + 4)) & 3];
}
EXPORT_SYMBOL_GPL(snd_hda_get_jack_connectivity);

/**
 * snd_hda_get_jack_type - Give a type string of the jack
 * @cfg: pin default config value
 *
 * Parse the pin default config value and returns the string of the
 * jack type, i.e. the purpose of the jack, such as Line-Out or CD.
 */
const char *snd_hda_get_jack_type(u32 cfg)
{
        static char *jack_types[16] = {
                "Line Out", "Speaker", "HP Out", "CD",
                "SPDIF Out", "Digital Out", "Modem Line", "Modem Hand",
                "Line In", "Aux", "Mic", "Telephony",
                "SPDIF In", "Digital In", "Reserved", "Other"
        };

        return jack_types[(cfg & AC_DEFCFG_DEVICE)
                                >> AC_DEFCFG_DEVICE_SHIFT];
}
EXPORT_SYMBOL_GPL(snd_hda_get_jack_type);

/*
 * Send and receive a verb - passed to exec_verb override for hdac_device
 */
static int codec_exec_verb(struct hdac_device *dev, unsigned int cmd,
                           unsigned int flags, unsigned int *res)
{
        struct hda_codec *codec = container_of(dev, struct hda_codec, core);
        struct hda_bus *bus = codec->bus;
        int err;

        if (cmd == ~0)
                return -1;

 again:
        snd_hda_power_up(codec);
        mutex_lock(&bus->core.cmd_mutex);
        if (flags & HDA_RW_NO_RESPONSE_FALLBACK)
                bus->no_response_fallback = 1;
        err = snd_hdac_bus_exec_verb_unlocked(&bus->core, codec->core.addr,
                                              cmd, res);
        bus->no_response_fallback = 0;
        mutex_unlock(&bus->core.cmd_mutex);
        snd_hda_power_down(codec);
        if (!codec_in_pm(codec) && res && err < 0 && bus->rirb_error) {
                if (bus->response_reset) {
                        codec_dbg(codec,
                                  "resetting BUS due to fatal communication error\n");
                        bus->ops.bus_reset(bus);
                }
                goto again;
        }
        /* clear reset-flag when the communication gets recovered */
        if (!err || codec_in_pm(codec))
                bus->response_reset = 0;
        return err;
}

/**
 * snd_hda_codec_read - send a command and get the response
 * @codec: the HDA codec
 * @nid: NID to send the command
 * @flags: optional bit flags
 * @verb: the verb to send
 * @parm: the parameter for the verb
 *
 * Send a single command and read the corresponding response.
 *
 * Returns the obtained response value, or -1 for an error.
 */
unsigned int snd_hda_codec_read(struct hda_codec *codec, hda_nid_t nid,
                                int flags,
                                unsigned int verb, unsigned int parm)
{
        unsigned int cmd = snd_hdac_make_cmd(&codec->core, nid, verb, parm);
        unsigned int res;
        if (snd_hdac_exec_verb(&codec->core, cmd, flags, &res))
                return -1;
        return res;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_read);

/**
 * snd_hda_codec_write - send a single command without waiting for response
 * @codec: the HDA codec
 * @nid: NID to send the command
 * @flags: optional bit flags
 * @verb: the verb to send
 * @parm: the parameter for the verb
 *
 * Send a single command without waiting for response.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_codec_write(struct hda_codec *codec, hda_nid_t nid, int flags,
                        unsigned int verb, unsigned int parm)
{
        unsigned int cmd = snd_hdac_make_cmd(&codec->core, nid, verb, parm);
        return snd_hdac_exec_verb(&codec->core, cmd, flags, NULL);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_write);

/**
 * snd_hda_sequence_write - sequence writes
 * @codec: the HDA codec
 * @seq: VERB array to send
 *
 * Send the commands sequentially from the given array.
 * The array must be terminated with NID=0.
 */
void snd_hda_sequence_write(struct hda_codec *codec, const struct hda_verb *seq)
{
        for (; seq->nid; seq++)
                snd_hda_codec_write(codec, seq->nid, 0, seq->verb, seq->param);
}
EXPORT_SYMBOL_GPL(snd_hda_sequence_write);

/* connection list element */
struct hda_conn_list {
        struct list_head list;
        int len;
        hda_nid_t nid;
        hda_nid_t conns[0];
};

/* look up the cached results */
static struct hda_conn_list *
lookup_conn_list(struct hda_codec *codec, hda_nid_t nid)
{
        struct hda_conn_list *p;
        list_for_each_entry(p, &codec->conn_list, list) {
                if (p->nid == nid)
                        return p;
        }
        return NULL;
}

static int add_conn_list(struct hda_codec *codec, hda_nid_t nid, int len,
                         const hda_nid_t *list)
{
        struct hda_conn_list *p;

        p = kmalloc(sizeof(*p) + len * sizeof(hda_nid_t), GFP_KERNEL);
        if (!p)
                return -ENOMEM;
        p->len = len;
        p->nid = nid;
        memcpy(p->conns, list, len * sizeof(hda_nid_t));
        list_add(&p->list, &codec->conn_list);
        return 0;
}

static void remove_conn_list(struct hda_codec *codec)
{
        while (!list_empty(&codec->conn_list)) {
                struct hda_conn_list *p;
                p = list_first_entry(&codec->conn_list, typeof(*p), list);
                list_del(&p->list);
                kfree(p);
        }
}

/* read the connection and add to the cache */
static int read_and_add_raw_conns(struct hda_codec *codec, hda_nid_t nid)
{
        hda_nid_t list[32];
        hda_nid_t *result = list;
        int len;

        len = snd_hda_get_raw_connections(codec, nid, list, ARRAY_SIZE(list));
        if (len == -ENOSPC) {
                len = snd_hda_get_num_raw_conns(codec, nid);
                result = kmalloc(sizeof(hda_nid_t) * len, GFP_KERNEL);
                if (!result)
                        return -ENOMEM;
                len = snd_hda_get_raw_connections(codec, nid, result, len);
        }
        if (len >= 0)
                len = snd_hda_override_conn_list(codec, nid, len, result);
        if (result != list)
                kfree(result);
        return len;
}

/**
 * snd_hda_get_conn_list - get connection list
 * @codec: the HDA codec
 * @nid: NID to parse
 * @listp: the pointer to store NID list
 *
 * Parses the connection list of the given widget and stores the pointer
 * to the list of NIDs.
 *
 * Returns the number of connections, or a negative error code.
 *
 * Note that the returned pointer isn't protected against the list
 * modification.  If snd_hda_override_conn_list() might be called
 * concurrently, protect with a mutex appropriately.
 */
int snd_hda_get_conn_list(struct hda_codec *codec, hda_nid_t nid,
                          const hda_nid_t **listp)
{
        bool added = false;

        for (;;) {
                int err;
                const struct hda_conn_list *p;

                /* if the connection-list is already cached, read it */
                p = lookup_conn_list(codec, nid);
                if (p) {
                        if (listp)
                                *listp = p->conns;
                        return p->len;
                }
                if (snd_BUG_ON(added))
                        return -EINVAL;

                err = read_and_add_raw_conns(codec, nid);
                if (err < 0)
                        return err;
                added = true;
        }
}
EXPORT_SYMBOL_GPL(snd_hda_get_conn_list);

/**
 * snd_hda_get_connections - copy connection list
 * @codec: the HDA codec
 * @nid: NID to parse
 * @conn_list: connection list array; when NULL, checks only the size
 * @max_conns: max. number of connections to store
 *
 * Parses the connection list of the given widget and stores the list
 * of NIDs.
 *
 * Returns the number of connections, or a negative error code.
 */
int snd_hda_get_connections(struct hda_codec *codec, hda_nid_t nid,
                            hda_nid_t *conn_list, int max_conns)
{
        const hda_nid_t *list;
        int len = snd_hda_get_conn_list(codec, nid, &list);

        if (len > 0 && conn_list) {
                if (len > max_conns) {
                        codec_err(codec, "Too many connections %d for NID 0x%x\n",
                                   len, nid);
                        return -EINVAL;
                }
                memcpy(conn_list, list, len * sizeof(hda_nid_t));
        }

        return len;
}
EXPORT_SYMBOL_GPL(snd_hda_get_connections);

/**
 * snd_hda_override_conn_list - add/modify the connection-list to cache
 * @codec: the HDA codec
 * @nid: NID to parse
 * @len: number of connection list entries
 * @list: the list of connection entries
 *
 * Add or modify the given connection-list to the cache.  If the corresponding
 * cache already exists, invalidate it and append a new one.
 *
 * Returns zero or a negative error code.
 */
int snd_hda_override_conn_list(struct hda_codec *codec, hda_nid_t nid, int len,
                               const hda_nid_t *list)
{
        struct hda_conn_list *p;

        p = lookup_conn_list(codec, nid);
        if (p) {
                list_del(&p->list);
                kfree(p);
        }

        return add_conn_list(codec, nid, len, list);
}
EXPORT_SYMBOL_GPL(snd_hda_override_conn_list);

/**
 * snd_hda_get_conn_index - get the connection index of the given NID
 * @codec: the HDA codec
 * @mux: NID containing the list
 * @nid: NID to select
 * @recursive: 1 when searching NID recursively, otherwise 0
 *
 * Parses the connection list of the widget @mux and checks whether the
 * widget @nid is present.  If it is, return the connection index.
 * Otherwise it returns -1.
 */
int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux,
                           hda_nid_t nid, int recursive)
{
        const hda_nid_t *conn;
        int i, nums;

        nums = snd_hda_get_conn_list(codec, mux, &conn);
        for (i = 0; i < nums; i++)
                if (conn[i] == nid)
                        return i;
        if (!recursive)
                return -1;
        if (recursive > 10) {
                codec_dbg(codec, "too deep connection for 0x%x\n", nid);
                return -1;
        }
        recursive++;
        for (i = 0; i < nums; i++) {
                unsigned int type = get_wcaps_type(get_wcaps(codec, conn[i]));
                if (type == AC_WID_PIN || type == AC_WID_AUD_OUT)
                        continue;
                if (snd_hda_get_conn_index(codec, conn[i], nid, recursive) >= 0)
                        return i;
        }
        return -1;
}
EXPORT_SYMBOL_GPL(snd_hda_get_conn_index);


/* return DEVLIST_LEN parameter of the given widget */
static unsigned int get_num_devices(struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int wcaps = get_wcaps(codec, nid);
        unsigned int parm;

        if (!codec->dp_mst || !(wcaps & AC_WCAP_DIGITAL) ||
            get_wcaps_type(wcaps) != AC_WID_PIN)
                return 0;

        parm = snd_hda_param_read(codec, nid, AC_PAR_DEVLIST_LEN);
        if (parm == -1 && codec->bus->rirb_error)
                parm = 0;
        return parm & AC_DEV_LIST_LEN_MASK;
}

/**
 * snd_hda_get_devices - copy device list without cache
 * @codec: the HDA codec
 * @nid: NID of the pin to parse
 * @dev_list: device list array
 * @max_devices: max. number of devices to store
 *
 * Copy the device list. This info is dynamic and so not cached.
 * Currently called only from hda_proc.c, so not exported.
 */
int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
                        u8 *dev_list, int max_devices)
{
        unsigned int parm;
        int i, dev_len, devices;

        parm = get_num_devices(codec, nid);
        if (!parm)      /* not multi-stream capable */
                return 0;

        dev_len = parm + 1;
        dev_len = dev_len < max_devices ? dev_len : max_devices;

        devices = 0;
        while (devices < dev_len) {
                parm = snd_hda_codec_read(codec, nid, 0,
                                          AC_VERB_GET_DEVICE_LIST, devices);
                if (parm == -1 && codec->bus->rirb_error)
                        break;

                for (i = 0; i < 8; i++) {
                        dev_list[devices] = (u8)parm;
                        parm >>= 4;
                        devices++;
                        if (devices >= dev_len)
                                break;
                }
        }
        return devices;
}

/*
 * destructor
 */
static void snd_hda_bus_free(struct hda_bus *bus)
{
        if (!bus)
                return;
        if (bus->ops.private_free)
                bus->ops.private_free(bus);
        snd_hdac_bus_exit(&bus->core);
        kfree(bus);
}

static int snd_hda_bus_dev_free(struct snd_device *device)
{
        snd_hda_bus_free(device->device_data);
        return 0;
}

static int snd_hda_bus_dev_disconnect(struct snd_device *device)
{
        struct hda_bus *bus = device->device_data;
        bus->shutdown = 1;
        return 0;
}

/* hdac_bus_ops translations */
static int _hda_bus_command(struct hdac_bus *_bus, unsigned int cmd)
{
        struct hda_bus *bus = container_of(_bus, struct hda_bus, core);
        return bus->ops.command(bus, cmd);
}

static int _hda_bus_get_response(struct hdac_bus *_bus, unsigned int addr,
                                 unsigned int *res)
{
        struct hda_bus *bus = container_of(_bus, struct hda_bus, core);
        *res = bus->ops.get_response(bus, addr);
        return bus->rirb_error ? -EIO : 0;
}

static const struct hdac_bus_ops bus_ops = {
        .command = _hda_bus_command,
        .get_response = _hda_bus_get_response,
};

/**
 * snd_hda_bus_new - create a HDA bus
 * @card: the card entry
 * @busp: the pointer to store the created bus instance
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_bus_new(struct snd_card *card,
                    struct hda_bus **busp)
{
        struct hda_bus *bus;
        int err;
        static struct snd_device_ops dev_ops = {
                .dev_disconnect = snd_hda_bus_dev_disconnect,
                .dev_free = snd_hda_bus_dev_free,
        };

        if (busp)
                *busp = NULL;

        bus = kzalloc(sizeof(*bus), GFP_KERNEL);
        if (!bus)
                return -ENOMEM;

        err = snd_hdac_bus_init(&bus->core, card->dev, &bus_ops);
        if (err < 0) {
                kfree(bus);
                return err;
        }

        bus->card = card;
        mutex_init(&bus->prepare_mutex);

        err = snd_device_new(card, SNDRV_DEV_BUS, bus, &dev_ops);
        if (err < 0) {
                snd_hda_bus_free(bus);
                return err;
        }
        if (busp)
                *busp = bus;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_bus_new);

/*
 * read widget caps for each widget and store in cache
 */
static int read_widget_caps(struct hda_codec *codec, hda_nid_t fg_node)
{
        int i;
        hda_nid_t nid;

        codec->wcaps = kmalloc(codec->core.num_nodes * 4, GFP_KERNEL);
        if (!codec->wcaps)
                return -ENOMEM;
        nid = codec->core.start_nid;
        for (i = 0; i < codec->core.num_nodes; i++, nid++)
                codec->wcaps[i] = snd_hdac_read_parm_uncached(&codec->core,
                                        nid, AC_PAR_AUDIO_WIDGET_CAP);
        return 0;
}

/* read all pin default configurations and save codec->init_pins */
static int read_pin_defaults(struct hda_codec *codec)
{
        hda_nid_t nid;

        for_each_hda_codec_node(nid, codec) {
                struct hda_pincfg *pin;
                unsigned int wcaps = get_wcaps(codec, nid);
                unsigned int wid_type = get_wcaps_type(wcaps);
                if (wid_type != AC_WID_PIN)
                        continue;
                pin = snd_array_new(&codec->init_pins);
                if (!pin)
                        return -ENOMEM;
                pin->nid = nid;
                pin->cfg = snd_hda_codec_read(codec, nid, 0,
                                              AC_VERB_GET_CONFIG_DEFAULT, 0);
                pin->ctrl = snd_hda_codec_read(codec, nid, 0,
                                               AC_VERB_GET_PIN_WIDGET_CONTROL,
                                               0);
        }
        return 0;
}

/* look up the given pin config list and return the item matching with NID */
static struct hda_pincfg *look_up_pincfg(struct hda_codec *codec,
                                         struct snd_array *array,
                                         hda_nid_t nid)
{
        int i;
        for (i = 0; i < array->used; i++) {
                struct hda_pincfg *pin = snd_array_elem(array, i);
                if (pin->nid == nid)
                        return pin;
        }
        return NULL;
}

/* set the current pin config value for the given NID.
 * the value is cached, and read via snd_hda_codec_get_pincfg()
 */
int snd_hda_add_pincfg(struct hda_codec *codec, struct snd_array *list,
                       hda_nid_t nid, unsigned int cfg)
{
        struct hda_pincfg *pin;

        /* the check below may be invalid when pins are added by a fixup
         * dynamically (e.g. via snd_hda_codec_update_widgets()), so disabled
         * for now
         */
        /*
        if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
                return -EINVAL;
        */

        pin = look_up_pincfg(codec, list, nid);
        if (!pin) {
                pin = snd_array_new(list);
                if (!pin)
                        return -ENOMEM;
                pin->nid = nid;
        }
        pin->cfg = cfg;
        return 0;
}

/**
 * snd_hda_codec_set_pincfg - Override a pin default configuration
 * @codec: the HDA codec
 * @nid: NID to set the pin config
 * @cfg: the pin default config value
 *
 * Override a pin default configuration value in the cache.
 * This value can be read by snd_hda_codec_get_pincfg() in a higher
 * priority than the real hardware value.
 */
int snd_hda_codec_set_pincfg(struct hda_codec *codec,
                             hda_nid_t nid, unsigned int cfg)
{
        return snd_hda_add_pincfg(codec, &codec->driver_pins, nid, cfg);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_set_pincfg);

/**
 * snd_hda_codec_get_pincfg - Obtain a pin-default configuration
 * @codec: the HDA codec
 * @nid: NID to get the pin config
 *
 * Get the current pin config value of the given pin NID.
 * If the pincfg value is cached or overridden via sysfs or driver,
 * returns the cached value.
 */
unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid)
{
        struct hda_pincfg *pin;

#ifdef CONFIG_SND_HDA_RECONFIG
        {
                unsigned int cfg = 0;
                mutex_lock(&codec->user_mutex);
                pin = look_up_pincfg(codec, &codec->user_pins, nid);
                if (pin)
                        cfg = pin->cfg;
                mutex_unlock(&codec->user_mutex);
                if (cfg)
                        return cfg;
        }
#endif
        pin = look_up_pincfg(codec, &codec->driver_pins, nid);
        if (pin)
                return pin->cfg;
        pin = look_up_pincfg(codec, &codec->init_pins, nid);
        if (pin)
                return pin->cfg;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_get_pincfg);

/**
 * snd_hda_codec_set_pin_target - remember the current pinctl target value
 * @codec: the HDA codec
 * @nid: pin NID
 * @val: assigned pinctl value
 *
 * This function stores the given value to a pinctl target value in the
 * pincfg table.  This isn't always as same as the actually written value
 * but can be referred at any time via snd_hda_codec_get_pin_target().
 */
int snd_hda_codec_set_pin_target(struct hda_codec *codec, hda_nid_t nid,
                                 unsigned int val)
{
        struct hda_pincfg *pin;

        pin = look_up_pincfg(codec, &codec->init_pins, nid);
        if (!pin)
                return -EINVAL;
        pin->target = val;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_set_pin_target);

/**
 * snd_hda_codec_get_pin_target - return the current pinctl target value
 * @codec: the HDA codec
 * @nid: pin NID
 */
int snd_hda_codec_get_pin_target(struct hda_codec *codec, hda_nid_t nid)
{
        struct hda_pincfg *pin;

        pin = look_up_pincfg(codec, &codec->init_pins, nid);
        if (!pin)
                return 0;
        return pin->target;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_get_pin_target);

/**
 * snd_hda_shutup_pins - Shut up all pins
 * @codec: the HDA codec
 *
 * Clear all pin controls to shup up before suspend for avoiding click noise.
 * The controls aren't cached so that they can be resumed properly.
 */
void snd_hda_shutup_pins(struct hda_codec *codec)
{
        int i;
        /* don't shut up pins when unloading the driver; otherwise it breaks
         * the default pin setup at the next load of the driver
         */
        if (codec->bus->shutdown)
                return;
        for (i = 0; i < codec->init_pins.used; i++) {
                struct hda_pincfg *pin = snd_array_elem(&codec->init_pins, i);
                /* use read here for syncing after issuing each verb */
                snd_hda_codec_read(codec, pin->nid, 0,
                                   AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
        }
        codec->pins_shutup = 1;
}
EXPORT_SYMBOL_GPL(snd_hda_shutup_pins);

#ifdef CONFIG_PM
/* Restore the pin controls cleared previously via snd_hda_shutup_pins() */
static void restore_shutup_pins(struct hda_codec *codec)
{
        int i;
        if (!codec->pins_shutup)
                return;
        if (codec->bus->shutdown)
                return;
        for (i = 0; i < codec->init_pins.used; i++) {
                struct hda_pincfg *pin = snd_array_elem(&codec->init_pins, i);
                snd_hda_codec_write(codec, pin->nid, 0,
                                    AC_VERB_SET_PIN_WIDGET_CONTROL,
                                    pin->ctrl);
        }
        codec->pins_shutup = 0;
}
#endif

static void hda_jackpoll_work(struct work_struct *work)
{
        struct hda_codec *codec =
                container_of(work, struct hda_codec, jackpoll_work.work);

        snd_hda_jack_set_dirty_all(codec);
        snd_hda_jack_poll_all(codec);

        if (!codec->jackpoll_interval)
                return;

        schedule_delayed_work(&codec->jackpoll_work,
                              codec->jackpoll_interval);
}

static void init_hda_cache(struct hda_cache_rec *cache,
                           unsigned int record_size);
static void free_hda_cache(struct hda_cache_rec *cache);

/* release all pincfg lists */
static void free_init_pincfgs(struct hda_codec *codec)
{
        snd_array_free(&codec->driver_pins);
#ifdef CONFIG_SND_HDA_RECONFIG
        snd_array_free(&codec->user_pins);
#endif
        snd_array_free(&codec->init_pins);
}

/*
 * audio-converter setup caches
 */
struct hda_cvt_setup {
        hda_nid_t nid;
        u8 stream_tag;
        u8 channel_id;
        u16 format_id;
        unsigned char active;   /* cvt is currently used */
        unsigned char dirty;    /* setups should be cleared */
};

/* get or create a cache entry for the given audio converter NID */
static struct hda_cvt_setup *
get_hda_cvt_setup(struct hda_codec *codec, hda_nid_t nid)
{
        struct hda_cvt_setup *p;
        int i;

        for (i = 0; i < codec->cvt_setups.used; i++) {
                p = snd_array_elem(&codec->cvt_setups, i);
                if (p->nid == nid)
                        return p;
        }
        p = snd_array_new(&codec->cvt_setups);
        if (p)
                p->nid = nid;
        return p;
}

/*
 * PCM device
 */
static void release_pcm(struct kref *kref)
{
        struct hda_pcm *pcm = container_of(kref, struct hda_pcm, kref);

        if (pcm->pcm)
                snd_device_free(pcm->codec->card, pcm->pcm);
        clear_bit(pcm->device, pcm->codec->bus->pcm_dev_bits);
        kfree(pcm->name);
        kfree(pcm);
}

void snd_hda_codec_pcm_put(struct hda_pcm *pcm)
{
        kref_put(&pcm->kref, release_pcm);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_pcm_put);

struct hda_pcm *snd_hda_codec_pcm_new(struct hda_codec *codec,
                                      const char *fmt, ...)
{
        struct hda_pcm *pcm;
        va_list args;

        va_start(args, fmt);
        pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
        if (!pcm)
                return NULL;

        pcm->codec = codec;
        kref_init(&pcm->kref);
        pcm->name = kvasprintf(GFP_KERNEL, fmt, args);
        if (!pcm->name) {
                kfree(pcm);
                return NULL;
        }

        list_add_tail(&pcm->list, &codec->pcm_list_head);
        return pcm;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_pcm_new);

/*
 * codec destructor
 */
static void codec_release_pcms(struct hda_codec *codec)
{
        struct hda_pcm *pcm, *n;

        list_for_each_entry_safe(pcm, n, &codec->pcm_list_head, list) {
                list_del_init(&pcm->list);
                if (pcm->pcm)
                        snd_device_disconnect(codec->card, pcm->pcm);
                snd_hda_codec_pcm_put(pcm);
        }
}

void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
{
        if (codec->registered) {
                /* pm_runtime_put() is called in snd_hdac_device_exit() */
                pm_runtime_get_noresume(hda_codec_dev(codec));
                pm_runtime_disable(hda_codec_dev(codec));
                codec->registered = 0;
        }

        cancel_delayed_work_sync(&codec->jackpoll_work);
        if (!codec->in_freeing)
                snd_hda_ctls_clear(codec);
        codec_release_pcms(codec);
        snd_hda_detach_beep_device(codec);
        memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
        snd_hda_jack_tbl_clear(codec);
        codec->proc_widget_hook = NULL;
        codec->spec = NULL;

        free_hda_cache(&codec->amp_cache);
        free_hda_cache(&codec->cmd_cache);
        init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
        init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));

        /* free only driver_pins so that init_pins + user_pins are restored */
        snd_array_free(&codec->driver_pins);
        snd_array_free(&codec->cvt_setups);
        snd_array_free(&codec->spdif_out);
        snd_array_free(&codec->verbs);
        codec->preset = NULL;
        codec->slave_dig_outs = NULL;
        codec->spdif_status_reset = 0;
        snd_array_free(&codec->mixers);
        snd_array_free(&codec->nids);
        remove_conn_list(codec);
        snd_hdac_regmap_exit(&codec->core);
}

static unsigned int hda_set_power_state(struct hda_codec *codec,
                                unsigned int power_state);

/* also called from hda_bind.c */
void snd_hda_codec_register(struct hda_codec *codec)
{
        if (codec->registered)
                return;
        if (device_is_registered(hda_codec_dev(codec))) {
                snd_hda_register_beep_device(codec);
                pm_runtime_enable(hda_codec_dev(codec));
                /* it was powered up in snd_hda_codec_new(), now all done */
                snd_hda_power_down(codec);
                codec->registered = 1;
        }
}

static int snd_hda_codec_dev_register(struct snd_device *device)
{
        snd_hda_codec_register(device->device_data);
        return 0;
}

static int snd_hda_codec_dev_disconnect(struct snd_device *device)
{
        struct hda_codec *codec = device->device_data;

        snd_hda_detach_beep_device(codec);
        return 0;
}

static int snd_hda_codec_dev_free(struct snd_device *device)
{
        struct hda_codec *codec = device->device_data;

        codec->in_freeing = 1;
        snd_hdac_device_unregister(&codec->core);
        put_device(hda_codec_dev(codec));
        return 0;
}

static void snd_hda_codec_dev_release(struct device *dev)
{
        struct hda_codec *codec = dev_to_hda_codec(dev);

        free_init_pincfgs(codec);
        snd_hdac_device_exit(&codec->core);
        snd_hda_sysfs_clear(codec);
        free_hda_cache(&codec->amp_cache);
        free_hda_cache(&codec->cmd_cache);
        kfree(codec->modelname);
        kfree(codec->wcaps);
        kfree(codec);
}

/**
 * snd_hda_codec_new - create a HDA codec
 * @bus: the bus to assign
 * @codec_addr: the codec address
 * @codecp: the pointer to store the generated codec
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_codec_new(struct hda_bus *bus, struct snd_card *card,
                      unsigned int codec_addr, struct hda_codec **codecp)
{
        struct hda_codec *codec;
        char component[31];
        hda_nid_t fg;
        int err;
        static struct snd_device_ops dev_ops = {
                .dev_register = snd_hda_codec_dev_register,
                .dev_disconnect = snd_hda_codec_dev_disconnect,
                .dev_free = snd_hda_codec_dev_free,
        };

        if (snd_BUG_ON(!bus))
                return -EINVAL;
        if (snd_BUG_ON(codec_addr > HDA_MAX_CODEC_ADDRESS))
                return -EINVAL;

        codec = kzalloc(sizeof(*codec), GFP_KERNEL);
        if (!codec)
                return -ENOMEM;

        sprintf(component, "hdaudioC%dD%d", card->number, codec_addr);
        err = snd_hdac_device_init(&codec->core, &bus->core, component,
                                   codec_addr);
        if (err < 0) {
                kfree(codec);
                return err;
        }

        codec->core.dev.release = snd_hda_codec_dev_release;
        codec->core.type = HDA_DEV_LEGACY;
        codec->core.exec_verb = codec_exec_verb;

        codec->bus = bus;
        codec->card = card;
        codec->addr = codec_addr;
        mutex_init(&codec->spdif_mutex);
        mutex_init(&codec->control_mutex);
        mutex_init(&codec->hash_mutex);
        init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
        init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));
        snd_array_init(&codec->mixers, sizeof(struct hda_nid_item), 32);
        snd_array_init(&codec->nids, sizeof(struct hda_nid_item), 32);
        snd_array_init(&codec->init_pins, sizeof(struct hda_pincfg), 16);
        snd_array_init(&codec->driver_pins, sizeof(struct hda_pincfg), 16);
        snd_array_init(&codec->cvt_setups, sizeof(struct hda_cvt_setup), 8);
        snd_array_init(&codec->spdif_out, sizeof(struct hda_spdif_out), 16);
        snd_array_init(&codec->jacktbl, sizeof(struct hda_jack_tbl), 16);
        snd_array_init(&codec->verbs, sizeof(struct hda_verb *), 8);
        INIT_LIST_HEAD(&codec->conn_list);
        INIT_LIST_HEAD(&codec->pcm_list_head);

        INIT_DELAYED_WORK(&codec->jackpoll_work, hda_jackpoll_work);
        codec->depop_delay = -1;
        codec->fixup_id = HDA_FIXUP_ID_NOT_SET;

#ifdef CONFIG_PM
        codec->power_jiffies = jiffies;
#endif

        snd_hda_sysfs_init(codec);

        if (codec->bus->modelname) {
                codec->modelname = kstrdup(codec->bus->modelname, GFP_KERNEL);
                if (!codec->modelname) {
                        err = -ENODEV;
                        goto error;
                }
        }

        fg = codec->core.afg ? codec->core.afg : codec->core.mfg;
        err = read_widget_caps(codec, fg);
        if (err < 0)
                goto error;
        err = read_pin_defaults(codec);
        if (err < 0)
                goto error;

        /* power-up all before initialization */
        hda_set_power_state(codec, AC_PWRST_D0);

        snd_hda_codec_proc_new(codec);

        snd_hda_create_hwdep(codec);

        sprintf(component, "HDA:%08x,%08x,%08x", codec->core.vendor_id,
                codec->core.subsystem_id, codec->core.revision_id);
        snd_component_add(card, component);

        err = snd_device_new(card, SNDRV_DEV_CODEC, codec, &dev_ops);
        if (err < 0)
                goto error;

        if (codecp)
                *codecp = codec;
        return 0;

 error:
        put_device(hda_codec_dev(codec));
        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_new);

/**
 * snd_hda_codec_update_widgets - Refresh widget caps and pin defaults
 * @codec: the HDA codec
 *
 * Forcibly refresh the all widget caps and the init pin configurations of
 * the given codec.
 */
int snd_hda_codec_update_widgets(struct hda_codec *codec)
{
        hda_nid_t fg;
        int err;

        err = snd_hdac_refresh_widgets(&codec->core);
        if (err < 0)
                return err;

        /* Assume the function group node does not change,
         * only the widget nodes may change.
         */
        kfree(codec->wcaps);
        fg = codec->core.afg ? codec->core.afg : codec->core.mfg;
        err = read_widget_caps(codec, fg);
        if (err < 0)
                return err;

        snd_array_free(&codec->init_pins);
        err = read_pin_defaults(codec);

        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_update_widgets);

/* update the stream-id if changed */
static void update_pcm_stream_id(struct hda_codec *codec,
                                 struct hda_cvt_setup *p, hda_nid_t nid,
                                 u32 stream_tag, int channel_id)
{
        unsigned int oldval, newval;

        if (p->stream_tag != stream_tag || p->channel_id != channel_id) {
                oldval = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONV, 0);
                newval = (stream_tag << 4) | channel_id;
                if (oldval != newval)
                        snd_hda_codec_write(codec, nid, 0,
                                            AC_VERB_SET_CHANNEL_STREAMID,
                                            newval);
                p->stream_tag = stream_tag;
                p->channel_id = channel_id;
        }
}

/* update the format-id if changed */
static void update_pcm_format(struct hda_codec *codec, struct hda_cvt_setup *p,
                              hda_nid_t nid, int format)
{
        unsigned int oldval;

        if (p->format_id != format) {
                oldval = snd_hda_codec_read(codec, nid, 0,
                                            AC_VERB_GET_STREAM_FORMAT, 0);
                if (oldval != format) {
                        msleep(1);
                        snd_hda_codec_write(codec, nid, 0,
                                            AC_VERB_SET_STREAM_FORMAT,
                                            format);
                }
                p->format_id = format;
        }
}

/**
 * snd_hda_codec_setup_stream - set up the codec for streaming
 * @codec: the CODEC to set up
 * @nid: the NID to set up
 * @stream_tag: stream tag to pass, it's between 0x1 and 0xf.
 * @channel_id: channel id to pass, zero based.
 * @format: stream format.
 */
void snd_hda_codec_setup_stream(struct hda_codec *codec, hda_nid_t nid,
                                u32 stream_tag,
                                int channel_id, int format)
{
        struct hda_codec *c;
        struct hda_cvt_setup *p;
        int type;
        int i;

        if (!nid)
                return;

        codec_dbg(codec,
                  "hda_codec_setup_stream: NID=0x%x, stream=0x%x, channel=%d, format=0x%x\n",
                  nid, stream_tag, channel_id, format);
        p = get_hda_cvt_setup(codec, nid);
        if (!p)
                return;

        if (codec->patch_ops.stream_pm)
                codec->patch_ops.stream_pm(codec, nid, true);
        if (codec->pcm_format_first)
                update_pcm_format(codec, p, nid, format);
        update_pcm_stream_id(codec, p, nid, stream_tag, channel_id);
        if (!codec->pcm_format_first)
                update_pcm_format(codec, p, nid, format);

        p->active = 1;
        p->dirty = 0;

        /* make other inactive cvts with the same stream-tag dirty */
        type = get_wcaps_type(get_wcaps(codec, nid));
        list_for_each_codec(c, codec->bus) {
                for (i = 0; i < c->cvt_setups.used; i++) {
                        p = snd_array_elem(&c->cvt_setups, i);
                        if (!p->active && p->stream_tag == stream_tag &&
                            get_wcaps_type(get_wcaps(c, p->nid)) == type)
                                p->dirty = 1;
                }
        }
}
EXPORT_SYMBOL_GPL(snd_hda_codec_setup_stream);

static void really_cleanup_stream(struct hda_codec *codec,
                                  struct hda_cvt_setup *q);

/**
 * __snd_hda_codec_cleanup_stream - clean up the codec for closing
 * @codec: the CODEC to clean up
 * @nid: the NID to clean up
 * @do_now: really clean up the stream instead of clearing the active flag
 */
void __snd_hda_codec_cleanup_stream(struct hda_codec *codec, hda_nid_t nid,
                                    int do_now)
{
        struct hda_cvt_setup *p;

        if (!nid)
                return;

        if (codec->no_sticky_stream)
                do_now = 1;

        codec_dbg(codec, "hda_codec_cleanup_stream: NID=0x%x\n", nid);
        p = get_hda_cvt_setup(codec, nid);
        if (p) {
                /* here we just clear the active flag when do_now isn't set;
                 * actual clean-ups will be done later in
                 * purify_inactive_streams() called from snd_hda_codec_prpapre()
                 */
                if (do_now)
                        really_cleanup_stream(codec, p);
                else
                        p->active = 0;
        }
}
EXPORT_SYMBOL_GPL(__snd_hda_codec_cleanup_stream);

static void really_cleanup_stream(struct hda_codec *codec,
                                  struct hda_cvt_setup *q)
{
        hda_nid_t nid = q->nid;
        if (q->stream_tag || q->channel_id)
                snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_CHANNEL_STREAMID, 0);
        if (q->format_id)
                snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_STREAM_FORMAT, 0
);
        memset(q, 0, sizeof(*q));
        q->nid = nid;
        if (codec->patch_ops.stream_pm)
                codec->patch_ops.stream_pm(codec, nid, false);
}

/* clean up the all conflicting obsolete streams */
static void purify_inactive_streams(struct hda_codec *codec)
{
        struct hda_codec *c;
        int i;

        list_for_each_codec(c, codec->bus) {
                for (i = 0; i < c->cvt_setups.used; i++) {
                        struct hda_cvt_setup *p;
                        p = snd_array_elem(&c->cvt_setups, i);
                        if (p->dirty)
                                really_cleanup_stream(c, p);
                }
        }
}

#ifdef CONFIG_PM
/* clean up all streams; called from suspend */
static void hda_cleanup_all_streams(struct hda_codec *codec)
{
        int i;

        for (i = 0; i < codec->cvt_setups.used; i++) {
                struct hda_cvt_setup *p = snd_array_elem(&codec->cvt_setups, i);
                if (p->stream_tag)
                        really_cleanup_stream(codec, p);
        }
}
#endif

/*
 * amp access functions
 */

/* FIXME: more better hash key? */
#define HDA_HASH_KEY(nid, dir, idx) (u32)((nid) + ((idx) << 16) + ((dir) << 24))
#define HDA_HASH_PINCAP_KEY(nid) (u32)((nid) + (0x02 << 24))
#define HDA_HASH_PARPCM_KEY(nid) (u32)((nid) + (0x03 << 24))
#define HDA_HASH_PARSTR_KEY(nid) (u32)((nid) + (0x04 << 24))
#define INFO_AMP_CAPS   (1<<0)
#define INFO_AMP_VOL(ch)        (1 << (1 + (ch)))

/* initialize the hash table */
static void init_hda_cache(struct hda_cache_rec *cache,
                                     unsigned int record_size)
{
        memset(cache, 0, sizeof(*cache));
        memset(cache->hash, 0xff, sizeof(cache->hash));
        snd_array_init(&cache->buf, record_size, 64);
}

static void free_hda_cache(struct hda_cache_rec *cache)
{
        snd_array_free(&cache->buf);
}

/* query the hash.  allocate an entry if not found. */
static struct hda_cache_head  *get_hash(struct hda_cache_rec *cache, u32 key)
{
        u16 idx = key % (u16)ARRAY_SIZE(cache->hash);
        u16 cur = cache->hash[idx];
        struct hda_cache_head *info;

        while (cur != 0xffff) {
                info = snd_array_elem(&cache->buf, cur);
                if (info->key == key)
                        return info;
                cur = info->next;
        }
        return NULL;
}

/* query the hash.  allocate an entry if not found. */
static struct hda_cache_head  *get_alloc_hash(struct hda_cache_rec *cache,
                                              u32 key)
{
        struct hda_cache_head *info = get_hash(cache, key);
        if (!info) {
                u16 idx, cur;
                /* add a new hash entry */
                info = snd_array_new(&cache->buf);
                if (!info)
                        return NULL;
                cur = snd_array_index(&cache->buf, info);
                info->key = key;
                info->val = 0;
                info->dirty = 0;
                idx = key % (u16)ARRAY_SIZE(cache->hash);
                info->next = cache->hash[idx];
                cache->hash[idx] = cur;
        }
        return info;
}

/* query and allocate an amp hash entry */
static inline struct hda_amp_info *
get_alloc_amp_hash(struct hda_codec *codec, u32 key)
{
        return (struct hda_amp_info *)get_alloc_hash(&codec->amp_cache, key);
}

/* overwrite the value with the key in the caps hash */
static int write_caps_hash(struct hda_codec *codec, u32 key, unsigned int val)
{
        struct hda_amp_info *info;

        mutex_lock(&codec->hash_mutex);
        info = get_alloc_amp_hash(codec, key);
        if (!info) {
                mutex_unlock(&codec->hash_mutex);
                return -EINVAL;
        }
        info->amp_caps = val;
        info->head.val |= INFO_AMP_CAPS;
        mutex_unlock(&codec->hash_mutex);
        return 0;
}

/* query the value from the caps hash; if not found, fetch the current
 * value from the given function and store in the hash
 */
static unsigned int
query_caps_hash(struct hda_codec *codec, hda_nid_t nid, int dir, u32 key,
                unsigned int (*func)(struct hda_codec *, hda_nid_t, int))
{
        struct hda_amp_info *info;
        unsigned int val;

        mutex_lock(&codec->hash_mutex);
        info = get_alloc_amp_hash(codec, key);
        if (!info) {
                mutex_unlock(&codec->hash_mutex);
                return 0;
        }
        if (!(info->head.val & INFO_AMP_CAPS)) {
                mutex_unlock(&codec->hash_mutex); /* for reentrance */
                val = func(codec, nid, dir);
                write_caps_hash(codec, key, val);
        } else {
                val = info->amp_caps;
                mutex_unlock(&codec->hash_mutex);
        }
        return val;
}

static unsigned int read_amp_cap(struct hda_codec *codec, hda_nid_t nid,
                                 int direction)
{
        if (!(get_wcaps(codec, nid) & AC_WCAP_AMP_OVRD))
                nid = codec->core.afg;
        return snd_hda_param_read(codec, nid,
                                  direction == HDA_OUTPUT ?
                                  AC_PAR_AMP_OUT_CAP : AC_PAR_AMP_IN_CAP);
}

/**
 * query_amp_caps - query AMP capabilities
 * @codec: the HD-auio codec
 * @nid: the NID to query
 * @direction: either #HDA_INPUT or #HDA_OUTPUT
 *
 * Query AMP capabilities for the given widget and direction.
 * Returns the obtained capability bits.
 *
 * When cap bits have been already read, this doesn't read again but
 * returns the cached value.
 */
u32 query_amp_caps(struct hda_codec *codec, hda_nid_t nid, int direction)
{
        return query_caps_hash(codec, nid, direction,
                               HDA_HASH_KEY(nid, direction, 0),
                               read_amp_cap);
}
EXPORT_SYMBOL_GPL(query_amp_caps);

/**
 * snd_hda_check_amp_caps - query AMP capabilities
 * @codec: the HD-audio codec
 * @nid: the NID to query
 * @dir: either #HDA_INPUT or #HDA_OUTPUT
 * @bits: bit mask to check the result
 *
 * Check whether the widget has the given amp capability for the direction.
 */
bool snd_hda_check_amp_caps(struct hda_codec *codec, hda_nid_t nid,
                           int dir, unsigned int bits)
{
        if (!nid)
                return false;
        if (get_wcaps(codec, nid) & (1 << (dir + 1)))
                if (query_amp_caps(codec, nid, dir) & bits)
                        return true;
        return false;
}
EXPORT_SYMBOL_GPL(snd_hda_check_amp_caps);

/**
 * snd_hda_override_amp_caps - Override the AMP capabilities
 * @codec: the CODEC to clean up
 * @nid: the NID to clean up
 * @dir: either #HDA_INPUT or #HDA_OUTPUT
 * @caps: the capability bits to set
 *
 * Override the cached AMP caps bits value by the given one.
 * This function is useful if the driver needs to adjust the AMP ranges,
 * e.g. limit to 0dB, etc.
 *
 * Returns zero if successful or a negative error code.
 */
int snd_hda_override_amp_caps(struct hda_codec *codec, hda_nid_t nid, int dir,
                              unsigned int caps)
{
        return write_caps_hash(codec, HDA_HASH_KEY(nid, dir, 0), caps);
}
EXPORT_SYMBOL_GPL(snd_hda_override_amp_caps);

static unsigned int read_pin_cap(struct hda_codec *codec, hda_nid_t nid,
                                 int dir)
{
        return snd_hda_param_read(codec, nid, AC_PAR_PIN_CAP);
}

/**
 * snd_hda_query_pin_caps - Query PIN capabilities
 * @codec: the HD-auio codec
 * @nid: the NID to query
 *
 * Query PIN capabilities for the given widget.
 * Returns the obtained capability bits.
 *
 * When cap bits have been already read, this doesn't read again but
 * returns the cached value.
 */
u32 snd_hda_query_pin_caps(struct hda_codec *codec, hda_nid_t nid)
{
        return query_caps_hash(codec, nid, 0, HDA_HASH_PINCAP_KEY(nid),
                               read_pin_cap);
}
EXPORT_SYMBOL_GPL(snd_hda_query_pin_caps);

/**
 * snd_hda_override_pin_caps - Override the pin capabilities
 * @codec: the CODEC
 * @nid: the NID to override
 * @caps: the capability bits to set
 *
 * Override the cached PIN capabilitiy bits value by the given one.
 *
 * Returns zero if successful or a negative error code.
 */
int snd_hda_override_pin_caps(struct hda_codec *codec, hda_nid_t nid,
                              unsigned int caps)
{
        return write_caps_hash(codec, HDA_HASH_PINCAP_KEY(nid), caps);
}
EXPORT_SYMBOL_GPL(snd_hda_override_pin_caps);

/* read or sync the hash value with the current value;
 * call within hash_mutex
 */
static struct hda_amp_info *
update_amp_hash(struct hda_codec *codec, hda_nid_t nid, int ch,
                int direction, int index, bool init_only)
{
        struct hda_amp_info *info;
        unsigned int parm, val = 0;
        bool val_read = false;

 retry:
        info = get_alloc_amp_hash(codec, HDA_HASH_KEY(nid, direction, index));
        if (!info)
                return NULL;
        if (!(info->head.val & INFO_AMP_VOL(ch))) {
                if (!val_read) {
                        mutex_unlock(&codec->hash_mutex);
                        parm = ch ? AC_AMP_GET_RIGHT : AC_AMP_GET_LEFT;
                        parm |= direction == HDA_OUTPUT ?
                                AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT;
                        parm |= index;
                        val = snd_hda_codec_read(codec, nid, 0,
                                 AC_VERB_GET_AMP_GAIN_MUTE, parm);
                        val &= 0xff;
                        val_read = true;
                        mutex_lock(&codec->hash_mutex);
                        goto retry;
                }
                info->vol[ch] = val;
                info->head.val |= INFO_AMP_VOL(ch);
        } else if (init_only)
                return NULL;
        return info;
}

/*
 * write the current volume in info to the h/w
 */
static void put_vol_mute(struct hda_codec *codec, unsigned int amp_caps,
                         hda_nid_t nid, int ch, int direction, int index,
                         int val)
{
        u32 parm;

        parm = ch ? AC_AMP_SET_RIGHT : AC_AMP_SET_LEFT;
        parm |= direction == HDA_OUTPUT ? AC_AMP_SET_OUTPUT : AC_AMP_SET_INPUT;
        parm |= index << AC_AMP_SET_INDEX_SHIFT;
        if ((val & HDA_AMP_MUTE) && !(amp_caps & AC_AMPCAP_MUTE) &&
            (amp_caps & AC_AMPCAP_MIN_MUTE))
                ; /* set the zero value as a fake mute */
        else
                parm |= val;
        snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, parm);
}

/**
 * snd_hda_codec_amp_read - Read AMP value
 * @codec: HD-audio codec
 * @nid: NID to read the AMP value
 * @ch: channel (left=0 or right=1)
 * @direction: #HDA_INPUT or #HDA_OUTPUT
 * @index: the index value (only for input direction)
 *
 * Read AMP value.  The volume is between 0 to 0x7f, 0x80 = mute bit.
 */
int snd_hda_codec_amp_read(struct hda_codec *codec, hda_nid_t nid, int ch,
                           int direction, int index)
{
        struct hda_amp_info *info;
        unsigned int val = 0;

        mutex_lock(&codec->hash_mutex);
        info = update_amp_hash(codec, nid, ch, direction, index, false);
        if (info)
                val = info->vol[ch];
        mutex_unlock(&codec->hash_mutex);
        return val;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_amp_read);

static int codec_amp_update(struct hda_codec *codec, hda_nid_t nid, int ch,
                            int direction, int idx, int mask, int val,
                            bool init_only, bool cache_only)
{
        struct hda_amp_info *info;
        unsigned int caps;

        if (snd_BUG_ON(mask & ~0xff))
                mask &= 0xff;
        val &= mask;

        mutex_lock(&codec->hash_mutex);
        info = update_amp_hash(codec, nid, ch, direction, idx, init_only);
        if (!info) {
                mutex_unlock(&codec->hash_mutex);
                return 0;
        }
        val |= info->vol[ch] & ~mask;
        if (info->vol[ch] == val) {
                mutex_unlock(&codec->hash_mutex);
                return 0;
        }
        info->vol[ch] = val;
        info->head.dirty |= cache_only;
        caps = info->amp_caps;
        mutex_unlock(&codec->hash_mutex);
        if (!cache_only)
                put_vol_mute(codec, caps, nid, ch, direction, idx, val);
        return 1;
}

/**
 * snd_hda_codec_amp_update - update the AMP value
 * @codec: HD-audio codec
 * @nid: NID to read the AMP value
 * @ch: channel (left=0 or right=1)
 * @direction: #HDA_INPUT or #HDA_OUTPUT
 * @idx: the index value (only for input direction)
 * @mask: bit mask to set
 * @val: the bits value to set
 *
 * Update the AMP value with a bit mask.
 * Returns 0 if the value is unchanged, 1 if changed.
 */
int snd_hda_codec_amp_update(struct hda_codec *codec, hda_nid_t nid, int ch,
                             int direction, int idx, int mask, int val)
{
        return codec_amp_update(codec, nid, ch, direction, idx, mask, val,
                                false, codec->cached_write);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_amp_update);

/**
 * snd_hda_codec_amp_stereo - update the AMP stereo values
 * @codec: HD-audio codec
 * @nid: NID to read the AMP value
 * @direction: #HDA_INPUT or #HDA_OUTPUT
 * @idx: the index value (only for input direction)
 * @mask: bit mask to set
 * @val: the bits value to set
 *
 * Update the AMP values like snd_hda_codec_amp_update(), but for a
 * stereo widget with the same mask and value.
 */
int snd_hda_codec_amp_stereo(struct hda_codec *codec, hda_nid_t nid,
                             int direction, int idx, int mask, int val)
{
        int ch, ret = 0;

        if (snd_BUG_ON(mask & ~0xff))
                mask &= 0xff;
        for (ch = 0; ch < 2; ch++)
                ret |= snd_hda_codec_amp_update(codec, nid, ch, direction,
                                                idx, mask, val);
        return ret;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_amp_stereo);

/**
 * snd_hda_codec_amp_init - initialize the AMP value
 * @codec: the HDA codec
 * @nid: NID to read the AMP value
 * @ch: channel (left=0 or right=1)
 * @dir: #HDA_INPUT or #HDA_OUTPUT
 * @idx: the index value (only for input direction)
 * @mask: bit mask to set
 * @val: the bits value to set
 *
 * Works like snd_hda_codec_amp_update() but it writes the value only at
 * the first access.  If the amp was already initialized / updated beforehand,
 * this does nothing.
 */
int snd_hda_codec_amp_init(struct hda_codec *codec, hda_nid_t nid, int ch,
                           int dir, int idx, int mask, int val)
{
        return codec_amp_update(codec, nid, ch, dir, idx, mask, val, true,
                                codec->cached_write);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_amp_init);

/**
 * snd_hda_codec_amp_init_stereo - initialize the stereo AMP value
 * @codec: the HDA codec
 * @nid: NID to read the AMP value
 * @dir: #HDA_INPUT or #HDA_OUTPUT
 * @idx: the index value (only for input direction)
 * @mask: bit mask to set
 * @val: the bits value to set
 *
 * Call snd_hda_codec_amp_init() for both stereo channels.
 */
int snd_hda_codec_amp_init_stereo(struct hda_codec *codec, hda_nid_t nid,
                                  int dir, int idx, int mask, int val)
{
        int ch, ret = 0;

        if (snd_BUG_ON(mask & ~0xff))
                mask &= 0xff;
        for (ch = 0; ch < 2; ch++)
                ret |= snd_hda_codec_amp_init(codec, nid, ch, dir,
                                              idx, mask, val);
        return ret;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_amp_init_stereo);

/**
 * snd_hda_codec_resume_amp - Resume all AMP commands from the cache
 * @codec: HD-audio codec
 *
 * Resume the all amp commands from the cache.
 */
void snd_hda_codec_resume_amp(struct hda_codec *codec)
{
        int i;

        mutex_lock(&codec->hash_mutex);
        codec->cached_write = 0;
        for (i = 0; i < codec->amp_cache.buf.used; i++) {
                struct hda_amp_info *buffer;
                u32 key;
                hda_nid_t nid;
                unsigned int idx, dir, ch;
                struct hda_amp_info info;

                buffer = snd_array_elem(&codec->amp_cache.buf, i);
                if (!buffer->head.dirty)
                        continue;
                buffer->head.dirty = 0;
                info = *buffer;
                key = info.head.key;
                if (!key)
                        continue;
                nid = key & 0xff;
                idx = (key >> 16) & 0xff;
                dir = (key >> 24) & 0xff;
                for (ch = 0; ch < 2; ch++) {
                        if (!(info.head.val & INFO_AMP_VOL(ch)))
                                continue;
                        mutex_unlock(&codec->hash_mutex);
                        put_vol_mute(codec, info.amp_caps, nid, ch, dir, idx,
                                     info.vol[ch]);
                        mutex_lock(&codec->hash_mutex);
                }
        }
        mutex_unlock(&codec->hash_mutex);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_resume_amp);

static u32 get_amp_max_value(struct hda_codec *codec, hda_nid_t nid, int dir,
                             unsigned int ofs)
{
        u32 caps = query_amp_caps(codec, nid, dir);
        /* get num steps */
        caps = (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
        if (ofs < caps)
                caps -= ofs;
        return caps;
}

/**
 * snd_hda_mixer_amp_volume_info - Info callback for a standard AMP mixer
 * @kcontrol: referred ctl element
 * @uinfo: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_volume_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        u16 nid = get_amp_nid(kcontrol);
        u8 chs = get_amp_channels(kcontrol);
        int dir = get_amp_direction(kcontrol);
        unsigned int ofs = get_amp_offset(kcontrol);

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = chs == 3 ? 2 : 1;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = get_amp_max_value(codec, nid, dir, ofs);
        if (!uinfo->value.integer.max) {
                codec_warn(codec,
                           "num_steps = 0 for NID=0x%x (ctl = %s)\n",
                           nid, kcontrol->id.name);
                return -EINVAL;
        }
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_volume_info);


static inline unsigned int
read_amp_value(struct hda_codec *codec, hda_nid_t nid,
               int ch, int dir, int idx, unsigned int ofs)
{
        unsigned int val;
        val = snd_hda_codec_amp_read(codec, nid, ch, dir, idx);
        val &= HDA_AMP_VOLMASK;
        if (val >= ofs)
                val -= ofs;
        else
                val = 0;
        return val;
}

static inline int
update_amp_value(struct hda_codec *codec, hda_nid_t nid,
                 int ch, int dir, int idx, unsigned int ofs,
                 unsigned int val)
{
        unsigned int maxval;

        if (val > 0)
                val += ofs;
        /* ofs = 0: raw max value */
        maxval = get_amp_max_value(codec, nid, dir, 0);
        if (val > maxval)
                val = maxval;
        return codec_amp_update(codec, nid, ch, dir, idx, HDA_AMP_VOLMASK, val,
                                false, !hda_codec_is_power_on(codec));
}

/**
 * snd_hda_mixer_amp_volume_get - Get callback for a standard AMP mixer volume
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_volume_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = get_amp_nid(kcontrol);
        int chs = get_amp_channels(kcontrol);
        int dir = get_amp_direction(kcontrol);
        int idx = get_amp_index(kcontrol);
        unsigned int ofs = get_amp_offset(kcontrol);
        long *valp = ucontrol->value.integer.value;

        if (chs & 1)
                *valp++ = read_amp_value(codec, nid, 0, dir, idx, ofs);
        if (chs & 2)
                *valp = read_amp_value(codec, nid, 1, dir, idx, ofs);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_volume_get);

/**
 * snd_hda_mixer_amp_volume_put - Put callback for a standard AMP mixer volume
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_volume_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = get_amp_nid(kcontrol);
        int chs = get_amp_channels(kcontrol);
        int dir = get_amp_direction(kcontrol);
        int idx = get_amp_index(kcontrol);
        unsigned int ofs = get_amp_offset(kcontrol);
        long *valp = ucontrol->value.integer.value;
        int change = 0;

        if (chs & 1) {
                change = update_amp_value(codec, nid, 0, dir, idx, ofs, *valp);
                valp++;
        }
        if (chs & 2)
                change |= update_amp_value(codec, nid, 1, dir, idx, ofs, *valp);
        return change;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_volume_put);

/**
 * snd_hda_mixer_amp_volume_put - TLV callback for a standard AMP mixer volume
 * @kcontrol: ctl element
 * @op_flag: operation flag
 * @size: byte size of input TLV
 * @_tlv: TLV data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_tlv(struct snd_kcontrol *kcontrol, int op_flag,
                          unsigned int size, unsigned int __user *_tlv)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = get_amp_nid(kcontrol);
        int dir = get_amp_direction(kcontrol);
        unsigned int ofs = get_amp_offset(kcontrol);
        bool min_mute = get_amp_min_mute(kcontrol);
        u32 caps, val1, val2;

        if (size < 4 * sizeof(unsigned int))
                return -ENOMEM;
        caps = query_amp_caps(codec, nid, dir);
        val2 = (caps & AC_AMPCAP_STEP_SIZE) >> AC_AMPCAP_STEP_SIZE_SHIFT;
        val2 = (val2 + 1) * 25;
        val1 = -((caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT);
        val1 += ofs;
        val1 = ((int)val1) * ((int)val2);
        if (min_mute || (caps & AC_AMPCAP_MIN_MUTE))
                val2 |= TLV_DB_SCALE_MUTE;
        if (put_user(SNDRV_CTL_TLVT_DB_SCALE, _tlv))
                return -EFAULT;
        if (put_user(2 * sizeof(unsigned int), _tlv + 1))
                return -EFAULT;
        if (put_user(val1, _tlv + 2))
                return -EFAULT;
        if (put_user(val2, _tlv + 3))
                return -EFAULT;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_tlv);

/**
 * snd_hda_set_vmaster_tlv - Set TLV for a virtual master control
 * @codec: HD-audio codec
 * @nid: NID of a reference widget
 * @dir: #HDA_INPUT or #HDA_OUTPUT
 * @tlv: TLV data to be stored, at least 4 elements
 *
 * Set (static) TLV data for a virtual master volume using the AMP caps
 * obtained from the reference NID.
 * The volume range is recalculated as if the max volume is 0dB.
 */
void snd_hda_set_vmaster_tlv(struct hda_codec *codec, hda_nid_t nid, int dir,
                             unsigned int *tlv)
{
        u32 caps;
        int nums, step;

        caps = query_amp_caps(codec, nid, dir);
        nums = (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
        step = (caps & AC_AMPCAP_STEP_SIZE) >> AC_AMPCAP_STEP_SIZE_SHIFT;
        step = (step + 1) * 25;
        tlv[0] = SNDRV_CTL_TLVT_DB_SCALE;
        tlv[1] = 2 * sizeof(unsigned int);
        tlv[2] = -nums * step;
        tlv[3] = step;
}
EXPORT_SYMBOL_GPL(snd_hda_set_vmaster_tlv);

/* find a mixer control element with the given name */
static struct snd_kcontrol *
find_mixer_ctl(struct hda_codec *codec, const char *name, int dev, int idx)
{
        struct snd_ctl_elem_id id;
        memset(&id, 0, sizeof(id));
        id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
        id.device = dev;
        id.index = idx;
        if (snd_BUG_ON(strlen(name) >= sizeof(id.name)))
                return NULL;
        strcpy(id.name, name);
        return snd_ctl_find_id(codec->card, &id);
}

/**
 * snd_hda_find_mixer_ctl - Find a mixer control element with the given name
 * @codec: HD-audio codec
 * @name: ctl id name string
 *
 * Get the control element with the given id string and IFACE_MIXER.
 */
struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
                                            const char *name)
{
        return find_mixer_ctl(codec, name, 0, 0);
}
EXPORT_SYMBOL_GPL(snd_hda_find_mixer_ctl);

static int find_empty_mixer_ctl_idx(struct hda_codec *codec, const char *name,
                                    int start_idx)
{
        int i, idx;
        /* 16 ctlrs should be large enough */
        for (i = 0, idx = start_idx; i < 16; i++, idx++) {
                if (!find_mixer_ctl(codec, name, 0, idx))
                        return idx;
        }
        return -EBUSY;
}

/**
 * snd_hda_ctl_add - Add a control element and assign to the codec
 * @codec: HD-audio codec
 * @nid: corresponding NID (optional)
 * @kctl: the control element to assign
 *
 * Add the given control element to an array inside the codec instance.
 * All control elements belonging to a codec are supposed to be added
 * by this function so that a proper clean-up works at the free or
 * reconfiguration time.
 *
 * If non-zero @nid is passed, the NID is assigned to the control element.
 * The assignment is shown in the codec proc file.
 *
 * snd_hda_ctl_add() checks the control subdev id field whether
 * #HDA_SUBDEV_NID_FLAG bit is set.  If set (and @nid is zero), the lower
 * bits value is taken as the NID to assign. The #HDA_NID_ITEM_AMP bit
 * specifies if kctl->private_value is a HDA amplifier value.
 */
int snd_hda_ctl_add(struct hda_codec *codec, hda_nid_t nid,
                    struct snd_kcontrol *kctl)
{
        int err;
        unsigned short flags = 0;
        struct hda_nid_item *item;

        if (kctl->id.subdevice & HDA_SUBDEV_AMP_FLAG) {
                flags |= HDA_NID_ITEM_AMP;
                if (nid == 0)
                        nid = get_amp_nid_(kctl->private_value);
        }
        if ((kctl->id.subdevice & HDA_SUBDEV_NID_FLAG) != 0 && nid == 0)
                nid = kctl->id.subdevice & 0xffff;
        if (kctl->id.subdevice & (HDA_SUBDEV_NID_FLAG|HDA_SUBDEV_AMP_FLAG))
                kctl->id.subdevice = 0;
        err = snd_ctl_add(codec->card, kctl);
        if (err < 0)
                return err;
        item = snd_array_new(&codec->mixers);
        if (!item)
                return -ENOMEM;
        item->kctl = kctl;
        item->nid = nid;
        item->flags = flags;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_ctl_add);

/**
 * snd_hda_add_nid - Assign a NID to a control element
 * @codec: HD-audio codec
 * @nid: corresponding NID (optional)
 * @kctl: the control element to assign
 * @index: index to kctl
 *
 * Add the given control element to an array inside the codec instance.
 * This function is used when #snd_hda_ctl_add cannot be used for 1:1
 * NID:KCTL mapping - for example "Capture Source" selector.
 */
int snd_hda_add_nid(struct hda_codec *codec, struct snd_kcontrol *kctl,
                    unsigned int index, hda_nid_t nid)
{
        struct hda_nid_item *item;

        if (nid > 0) {
                item = snd_array_new(&codec->nids);
                if (!item)
                        return -ENOMEM;
                item->kctl = kctl;
                item->index = index;
                item->nid = nid;
                return 0;
        }
        codec_err(codec, "no NID for mapping control %s:%d:%d\n",
                  kctl->id.name, kctl->id.index, index);
        return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_hda_add_nid);

/**
 * snd_hda_ctls_clear - Clear all controls assigned to the given codec
 * @codec: HD-audio codec
 */
void snd_hda_ctls_clear(struct hda_codec *codec)
{
        int i;
        struct hda_nid_item *items = codec->mixers.list;
        for (i = 0; i < codec->mixers.used; i++)
                snd_ctl_remove(codec->card, items[i].kctl);
        snd_array_free(&codec->mixers);
        snd_array_free(&codec->nids);
}

/**
 * snd_hda_lock_devices - pseudo device locking
 * @bus: the BUS
 *
 * toggle card->shutdown to allow/disallow the device access (as a hack)
 */
int snd_hda_lock_devices(struct hda_bus *bus)
{
        struct snd_card *card = bus->card;
        struct hda_codec *codec;

        spin_lock(&card->files_lock);
        if (card->shutdown)
                goto err_unlock;
        card->shutdown = 1;
        if (!list_empty(&card->ctl_files))
                goto err_clear;

        list_for_each_codec(codec, bus) {
                struct hda_pcm *cpcm;
                list_for_each_entry(cpcm, &codec->pcm_list_head, list) {
                        if (!cpcm->pcm)
                                continue;
                        if (cpcm->pcm->streams[0].substream_opened ||
                            cpcm->pcm->streams[1].substream_opened)
                                goto err_clear;
                }
        }
        spin_unlock(&card->files_lock);
        return 0;

 err_clear:
        card->shutdown = 0;
 err_unlock:
        spin_unlock(&card->files_lock);
        return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_hda_lock_devices);

/**
 * snd_hda_unlock_devices - pseudo device unlocking
 * @bus: the BUS
 */
void snd_hda_unlock_devices(struct hda_bus *bus)
{
        struct snd_card *card = bus->card;

        spin_lock(&card->files_lock);
        card->shutdown = 0;
        spin_unlock(&card->files_lock);
}
EXPORT_SYMBOL_GPL(snd_hda_unlock_devices);

/**
 * snd_hda_codec_reset - Clear all objects assigned to the codec
 * @codec: HD-audio codec
 *
 * This frees the all PCM and control elements assigned to the codec, and
 * clears the caches and restores the pin default configurations.
 *
 * When a device is being used, it returns -EBSY.  If successfully freed,
 * returns zero.
 */
int snd_hda_codec_reset(struct hda_codec *codec)
{
        struct hda_bus *bus = codec->bus;

        if (snd_hda_lock_devices(bus) < 0)
                return -EBUSY;

        /* OK, let it free */
        snd_hdac_device_unregister(&codec->core);

        /* allow device access again */
        snd_hda_unlock_devices(bus);
        return 0;
}

typedef int (*map_slave_func_t)(struct hda_codec *, void *, struct snd_kcontrol *);

/* apply the function to all matching slave ctls in the mixer list */
static int map_slaves(struct hda_codec *codec, const char * const *slaves,
                      const char *suffix, map_slave_func_t func, void *data) 
{
        struct hda_nid_item *items;
        const char * const *s;
        int i, err;

        items = codec->mixers.list;
        for (i = 0; i < codec->mixers.used; i++) {
                struct snd_kcontrol *sctl = items[i].kctl;
                if (!sctl || sctl->id.iface != SNDRV_CTL_ELEM_IFACE_MIXER)
                        continue;
                for (s = slaves; *s; s++) {
                        char tmpname[sizeof(sctl->id.name)];
                        const char *name = *s;
                        if (suffix) {
                                snprintf(tmpname, sizeof(tmpname), "%s %s",
                                         name, suffix);
                                name = tmpname;
                        }
                        if (!strcmp(sctl->id.name, name)) {
                                err = func(codec, data, sctl);
                                if (err)
                                        return err;
                                break;
                        }
                }
        }
        return 0;
}

static int check_slave_present(struct hda_codec *codec,
                               void *data, struct snd_kcontrol *sctl)
{
        return 1;
}

/* guess the value corresponding to 0dB */
static int get_kctl_0dB_offset(struct hda_codec *codec,
                               struct snd_kcontrol *kctl, int *step_to_check)
{
        int _tlv[4];
        const int *tlv = NULL;
        int val = -1;

        if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) {
                /* FIXME: set_fs() hack for obtaining user-space TLV data */
                mm_segment_t fs = get_fs();
                set_fs(get_ds());
                if (!kctl->tlv.c(kctl, 0, sizeof(_tlv), _tlv))
                        tlv = _tlv;
                set_fs(fs);
        } else if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_READ)
                tlv = kctl->tlv.p;
        if (tlv && tlv[0] == SNDRV_CTL_TLVT_DB_SCALE) {
                int step = tlv[3];
                step &= ~TLV_DB_SCALE_MUTE;
                if (!step)
                        return -1;
                if (*step_to_check && *step_to_check != step) {
                        codec_err(codec, "Mismatching dB step for vmaster slave (%d!=%d)\n",
-                                  *step_to_check, step);
                        return -1;
                }
                *step_to_check = step;
                val = -tlv[2] / step;
        }
        return val;
}

/* call kctl->put with the given value(s) */
static int put_kctl_with_value(struct snd_kcontrol *kctl, int val)
{
        struct snd_ctl_elem_value *ucontrol;
        ucontrol = kzalloc(sizeof(*ucontrol), GFP_KERNEL);
        if (!ucontrol)
                return -ENOMEM;
        ucontrol->value.integer.value[0] = val;
        ucontrol->value.integer.value[1] = val;
        kctl->put(kctl, ucontrol);
        kfree(ucontrol);
        return 0;
}

/* initialize the slave volume with 0dB */
static int init_slave_0dB(struct hda_codec *codec,
                          void *data, struct snd_kcontrol *slave)
{
        int offset = get_kctl_0dB_offset(codec, slave, data);
        if (offset > 0)
                put_kctl_with_value(slave, offset);
        return 0;
}

/* unmute the slave */
static int init_slave_unmute(struct hda_codec *codec,
                             void *data, struct snd_kcontrol *slave)
{
        return put_kctl_with_value(slave, 1);
}

static int add_slave(struct hda_codec *codec,
                     void *data, struct snd_kcontrol *slave)
{
        return snd_ctl_add_slave(data, slave);
}

/**
 * __snd_hda_add_vmaster - create a virtual master control and add slaves
 * @codec: HD-audio codec
 * @name: vmaster control name
 * @tlv: TLV data (optional)
 * @slaves: slave control names (optional)
 * @suffix: suffix string to each slave name (optional)
 * @init_slave_vol: initialize slaves to unmute/0dB
 * @ctl_ret: store the vmaster kcontrol in return
 *
 * Create a virtual master control with the given name.  The TLV data
 * must be either NULL or a valid data.
 *
 * @slaves is a NULL-terminated array of strings, each of which is a
 * slave control name.  All controls with these names are assigned to
 * the new virtual master control.
 *
 * This function returns zero if successful or a negative error code.
 */
int __snd_hda_add_vmaster(struct hda_codec *codec, char *name,
                        unsigned int *tlv, const char * const *slaves,
                          const char *suffix, bool init_slave_vol,
                          struct snd_kcontrol **ctl_ret)
{
        struct snd_kcontrol *kctl;
        int err;

        if (ctl_ret)
                *ctl_ret = NULL;

        err = map_slaves(codec, slaves, suffix, check_slave_present, NULL);
        if (err != 1) {
                codec_dbg(codec, "No slave found for %s\n", name);
                return 0;
        }
        kctl = snd_ctl_make_virtual_master(name, tlv);
        if (!kctl)
                return -ENOMEM;
        err = snd_hda_ctl_add(codec, 0, kctl);
        if (err < 0)
                return err;

        err = map_slaves(codec, slaves, suffix, add_slave, kctl);
        if (err < 0)
                return err;

        /* init with master mute & zero volume */
        put_kctl_with_value(kctl, 0);
        if (init_slave_vol) {
                int step = 0;
                map_slaves(codec, slaves, suffix,
                           tlv ? init_slave_0dB : init_slave_unmute, &step);
        }

        if (ctl_ret)
                *ctl_ret = kctl;
        return 0;
}
EXPORT_SYMBOL_GPL(__snd_hda_add_vmaster);

/*
 * mute-LED control using vmaster
 */
static int vmaster_mute_mode_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        static const char * const texts[] = {
                "On", "Off", "Follow Master"
        };

        return snd_ctl_enum_info(uinfo, 1, 3, texts);
}

static int vmaster_mute_mode_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_vmaster_mute_hook *hook = snd_kcontrol_chip(kcontrol);
        ucontrol->value.enumerated.item[0] = hook->mute_mode;
        return 0;
}

static int vmaster_mute_mode_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_vmaster_mute_hook *hook = snd_kcontrol_chip(kcontrol);
        unsigned int old_mode = hook->mute_mode;

        hook->mute_mode = ucontrol->value.enumerated.item[0];
        if (hook->mute_mode > HDA_VMUTE_FOLLOW_MASTER)
                hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
        if (old_mode == hook->mute_mode)
                return 0;
        snd_hda_sync_vmaster_hook(hook);
        return 1;
}

static struct snd_kcontrol_new vmaster_mute_mode = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Mute-LED Mode",
        .info = vmaster_mute_mode_info,
        .get = vmaster_mute_mode_get,
        .put = vmaster_mute_mode_put,
};

/**
 * snd_hda_add_vmaster_hook - Add a vmaster hook for mute-LED
 * @codec: the HDA codec
 * @hook: the vmaster hook object
 * @expose_enum_ctl: flag to create an enum ctl
 *
 * Add a mute-LED hook with the given vmaster switch kctl.
 * When @expose_enum_ctl is set, "Mute-LED Mode" control is automatically
 * created and associated with the given hook.
 */
int snd_hda_add_vmaster_hook(struct hda_codec *codec,
                             struct hda_vmaster_mute_hook *hook,
                             bool expose_enum_ctl)
{
        struct snd_kcontrol *kctl;

        if (!hook->hook || !hook->sw_kctl)
                return 0;
        snd_ctl_add_vmaster_hook(hook->sw_kctl, hook->hook, codec);
        hook->codec = codec;
        hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
        if (!expose_enum_ctl)
                return 0;
        kctl = snd_ctl_new1(&vmaster_mute_mode, hook);
        if (!kctl)
                return -ENOMEM;
        return snd_hda_ctl_add(codec, 0, kctl);
}
EXPORT_SYMBOL_GPL(snd_hda_add_vmaster_hook);

/**
 * snd_hda_sync_vmaster_hook - Sync vmaster hook
 * @hook: the vmaster hook
 *
 * Call the hook with the current value for synchronization.
 * Should be called in init callback.
 */
void snd_hda_sync_vmaster_hook(struct hda_vmaster_mute_hook *hook)
{
        if (!hook->hook || !hook->codec)
                return;
        /* don't call vmaster hook in the destructor since it might have
         * been already destroyed
         */
        if (hook->codec->bus->shutdown)
                return;
        switch (hook->mute_mode) {
        case HDA_VMUTE_FOLLOW_MASTER:
                snd_ctl_sync_vmaster_hook(hook->sw_kctl);
                break;
        default:
                hook->hook(hook->codec, hook->mute_mode);
                break;
        }
}
EXPORT_SYMBOL_GPL(snd_hda_sync_vmaster_hook);


/**
 * snd_hda_mixer_amp_switch_info - Info callback for a standard AMP mixer switch
 * @kcontrol: referred ctl element
 * @uinfo: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_switch_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        int chs = get_amp_channels(kcontrol);

        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
        uinfo->count = chs == 3 ? 2 : 1;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 1;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_info);

/**
 * snd_hda_mixer_amp_switch_get - Get callback for a standard AMP mixer switch
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_switch_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = get_amp_nid(kcontrol);
        int chs = get_amp_channels(kcontrol);
        int dir = get_amp_direction(kcontrol);
        int idx = get_amp_index(kcontrol);
        long *valp = ucontrol->value.integer.value;

        if (chs & 1)
                *valp++ = (snd_hda_codec_amp_read(codec, nid, 0, dir, idx) &
                           HDA_AMP_MUTE) ? 0 : 1;
        if (chs & 2)
                *valp = (snd_hda_codec_amp_read(codec, nid, 1, dir, idx) &
                         HDA_AMP_MUTE) ? 0 : 1;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_get);

/**
 * snd_hda_mixer_amp_switch_put - Put callback for a standard AMP mixer switch
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_COMPOSE_AMP_VAL*() or related macros.
 */
int snd_hda_mixer_amp_switch_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = get_amp_nid(kcontrol);
        int chs = get_amp_channels(kcontrol);
        int dir = get_amp_direction(kcontrol);
        int idx = get_amp_index(kcontrol);
        long *valp = ucontrol->value.integer.value;
        int change = 0;

        if (chs & 1) {
                change = codec_amp_update(codec, nid, 0, dir, idx,
                                          HDA_AMP_MUTE,
                                          *valp ? 0 : HDA_AMP_MUTE, false,
                                          !hda_codec_is_power_on(codec));
                valp++;
        }
        if (chs & 2)
                change |= codec_amp_update(codec, nid, 1, dir, idx,
                                           HDA_AMP_MUTE,
                                           *valp ? 0 : HDA_AMP_MUTE, false,
                                           !hda_codec_is_power_on(codec));
        hda_call_check_power_status(codec, nid);
        return change;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_put);

/*
 * bound volume controls
 *
 * bind multiple volumes (# indices, from 0)
 */

#define AMP_VAL_IDX_SHIFT       19
#define AMP_VAL_IDX_MASK        (0x0f<<19)

/**
 * snd_hda_mixer_bind_switch_get - Get callback for a bound volume control
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_MUTE*() macros.
 */
int snd_hda_mixer_bind_switch_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        unsigned long pval;
        int err;

        mutex_lock(&codec->control_mutex);
        pval = kcontrol->private_value;
        kcontrol->private_value = pval & ~AMP_VAL_IDX_MASK; /* index 0 */
        err = snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
        kcontrol->private_value = pval;
        mutex_unlock(&codec->control_mutex);
        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_switch_get);

/**
 * snd_hda_mixer_bind_switch_put - Put callback for a bound volume control
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_MUTE*() macros.
 */
int snd_hda_mixer_bind_switch_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        unsigned long pval;
        int i, indices, err = 0, change = 0;

        mutex_lock(&codec->control_mutex);
        pval = kcontrol->private_value;
        indices = (pval & AMP_VAL_IDX_MASK) >> AMP_VAL_IDX_SHIFT;
        for (i = 0; i < indices; i++) {
                kcontrol->private_value = (pval & ~AMP_VAL_IDX_MASK) |
                        (i << AMP_VAL_IDX_SHIFT);
                err = snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
                if (err < 0)
                        break;
                change |= err;
        }
        kcontrol->private_value = pval;
        mutex_unlock(&codec->control_mutex);
        return err < 0 ? err : change;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_switch_put);

/**
 * snd_hda_mixer_bind_ctls_info - Info callback for a generic bound control
 * @kcontrol: referred ctl element
 * @uinfo: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_VOL() or HDA_BIND_SW() macros.
 */
int snd_hda_mixer_bind_ctls_info(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_bind_ctls *c;
        int err;

        mutex_lock(&codec->control_mutex);
        c = (struct hda_bind_ctls *)kcontrol->private_value;
        kcontrol->private_value = *c->values;
        err = c->ops->info(kcontrol, uinfo);
        kcontrol->private_value = (long)c;
        mutex_unlock(&codec->control_mutex);
        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_ctls_info);

/**
 * snd_hda_mixer_bind_ctls_get - Get callback for a generic bound control
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_VOL() or HDA_BIND_SW() macros.
 */
int snd_hda_mixer_bind_ctls_get(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_bind_ctls *c;
        int err;

        mutex_lock(&codec->control_mutex);
        c = (struct hda_bind_ctls *)kcontrol->private_value;
        kcontrol->private_value = *c->values;
        err = c->ops->get(kcontrol, ucontrol);
        kcontrol->private_value = (long)c;
        mutex_unlock(&codec->control_mutex);
        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_ctls_get);

/**
 * snd_hda_mixer_bind_ctls_put - Put callback for a generic bound control
 * @kcontrol: ctl element
 * @ucontrol: pointer to get/store the data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_VOL() or HDA_BIND_SW() macros.
 */
int snd_hda_mixer_bind_ctls_put(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_bind_ctls *c;
        unsigned long *vals;
        int err = 0, change = 0;

        mutex_lock(&codec->control_mutex);
        c = (struct hda_bind_ctls *)kcontrol->private_value;
        for (vals = c->values; *vals; vals++) {
                kcontrol->private_value = *vals;
                err = c->ops->put(kcontrol, ucontrol);
                if (err < 0)
                        break;
                change |= err;
        }
        kcontrol->private_value = (long)c;
        mutex_unlock(&codec->control_mutex);
        return err < 0 ? err : change;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_ctls_put);

/**
 * snd_hda_mixer_bind_tlv - TLV callback for a generic bound control
 * @kcontrol: ctl element
 * @op_flag: operation flag
 * @size: byte size of input TLV
 * @tlv: TLV data
 *
 * The control element is supposed to have the private_value field
 * set up via HDA_BIND_VOL() macro.
 */
int snd_hda_mixer_bind_tlv(struct snd_kcontrol *kcontrol, int op_flag,
                           unsigned int size, unsigned int __user *tlv)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_bind_ctls *c;
        int err;

        mutex_lock(&codec->control_mutex);
        c = (struct hda_bind_ctls *)kcontrol->private_value;
        kcontrol->private_value = *c->values;
        err = c->ops->tlv(kcontrol, op_flag, size, tlv);
        kcontrol->private_value = (long)c;
        mutex_unlock(&codec->control_mutex);
        return err;
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_bind_tlv);

struct hda_ctl_ops snd_hda_bind_vol = {
        .info = snd_hda_mixer_amp_volume_info,
        .get = snd_hda_mixer_amp_volume_get,
        .put = snd_hda_mixer_amp_volume_put,
        .tlv = snd_hda_mixer_amp_tlv
};
EXPORT_SYMBOL_GPL(snd_hda_bind_vol);

struct hda_ctl_ops snd_hda_bind_sw = {
        .info = snd_hda_mixer_amp_switch_info,
        .get = snd_hda_mixer_amp_switch_get,
        .put = snd_hda_mixer_amp_switch_put,
        .tlv = snd_hda_mixer_amp_tlv
};
EXPORT_SYMBOL_GPL(snd_hda_bind_sw);

/*
 * SPDIF out controls
 */

static int snd_hda_spdif_mask_info(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
        uinfo->count = 1;
        return 0;
}

static int snd_hda_spdif_cmask_get(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_value *ucontrol)
{
        ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
                                           IEC958_AES0_NONAUDIO |
                                           IEC958_AES0_CON_EMPHASIS_5015 |
                                           IEC958_AES0_CON_NOT_COPYRIGHT;
        ucontrol->value.iec958.status[1] = IEC958_AES1_CON_CATEGORY |
                                           IEC958_AES1_CON_ORIGINAL;
        return 0;
}

static int snd_hda_spdif_pmask_get(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_value *ucontrol)
{
        ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
                                           IEC958_AES0_NONAUDIO |
                                           IEC958_AES0_PRO_EMPHASIS_5015;
        return 0;
}

static int snd_hda_spdif_default_get(struct snd_kcontrol *kcontrol,
                                     struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        int idx = kcontrol->private_value;
        struct hda_spdif_out *spdif;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        ucontrol->value.iec958.status[0] = spdif->status & 0xff;
        ucontrol->value.iec958.status[1] = (spdif->status >> 8) & 0xff;
        ucontrol->value.iec958.status[2] = (spdif->status >> 16) & 0xff;
        ucontrol->value.iec958.status[3] = (spdif->status >> 24) & 0xff;
        mutex_unlock(&codec->spdif_mutex);

        return 0;
}

/* convert from SPDIF status bits to HDA SPDIF bits
 * bit 0 (DigEn) is always set zero (to be filled later)
 */
static unsigned short convert_from_spdif_status(unsigned int sbits)
{
        unsigned short val = 0;

        if (sbits & IEC958_AES0_PROFESSIONAL)
                val |= AC_DIG1_PROFESSIONAL;
        if (sbits & IEC958_AES0_NONAUDIO)
                val |= AC_DIG1_NONAUDIO;
        if (sbits & IEC958_AES0_PROFESSIONAL) {
                if ((sbits & IEC958_AES0_PRO_EMPHASIS) ==
                    IEC958_AES0_PRO_EMPHASIS_5015)
                        val |= AC_DIG1_EMPHASIS;
        } else {
                if ((sbits & IEC958_AES0_CON_EMPHASIS) ==
                    IEC958_AES0_CON_EMPHASIS_5015)
                        val |= AC_DIG1_EMPHASIS;
                if (!(sbits & IEC958_AES0_CON_NOT_COPYRIGHT))
                        val |= AC_DIG1_COPYRIGHT;
                if (sbits & (IEC958_AES1_CON_ORIGINAL << 8))
                        val |= AC_DIG1_LEVEL;
                val |= sbits & (IEC958_AES1_CON_CATEGORY << 8);
        }
        return val;
}

/* convert to SPDIF status bits from HDA SPDIF bits
 */
static unsigned int convert_to_spdif_status(unsigned short val)
{
        unsigned int sbits = 0;

        if (val & AC_DIG1_NONAUDIO)
                sbits |= IEC958_AES0_NONAUDIO;
        if (val & AC_DIG1_PROFESSIONAL)
                sbits |= IEC958_AES0_PROFESSIONAL;
        if (sbits & IEC958_AES0_PROFESSIONAL) {
                if (val & AC_DIG1_EMPHASIS)
                        sbits |= IEC958_AES0_PRO_EMPHASIS_5015;
        } else {
                if (val & AC_DIG1_EMPHASIS)
                        sbits |= IEC958_AES0_CON_EMPHASIS_5015;
                if (!(val & AC_DIG1_COPYRIGHT))
                        sbits |= IEC958_AES0_CON_NOT_COPYRIGHT;
                if (val & AC_DIG1_LEVEL)
                        sbits |= (IEC958_AES1_CON_ORIGINAL << 8);
                sbits |= val & (0x7f << 8);
        }
        return sbits;
}

/* set digital convert verbs both for the given NID and its slaves */
static void set_dig_out(struct hda_codec *codec, hda_nid_t nid,
                        int verb, int val)
{
        const hda_nid_t *d;

        snd_hda_codec_write_cache(codec, nid, 0, verb, val);
        d = codec->slave_dig_outs;
        if (!d)
                return;
        for (; *d; d++)
                snd_hda_codec_write_cache(codec, *d, 0, verb, val);
}

static inline void set_dig_out_convert(struct hda_codec *codec, hda_nid_t nid,
                                       int dig1, int dig2)
{
        if (dig1 != -1)
                set_dig_out(codec, nid, AC_VERB_SET_DIGI_CONVERT_1, dig1);
        if (dig2 != -1)
                set_dig_out(codec, nid, AC_VERB_SET_DIGI_CONVERT_2, dig2);
}

static int snd_hda_spdif_default_put(struct snd_kcontrol *kcontrol,
                                     struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        int idx = kcontrol->private_value;
        struct hda_spdif_out *spdif;
        hda_nid_t nid;
        unsigned short val;
        int change;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        nid = spdif->nid;
        spdif->status = ucontrol->value.iec958.status[0] |
                ((unsigned int)ucontrol->value.iec958.status[1] << 8) |
                ((unsigned int)ucontrol->value.iec958.status[2] << 16) |
                ((unsigned int)ucontrol->value.iec958.status[3] << 24);
        val = convert_from_spdif_status(spdif->status);
        val |= spdif->ctls & 1;
        change = spdif->ctls != val;
        spdif->ctls = val;
        if (change && nid != (u16)-1)
                set_dig_out_convert(codec, nid, val & 0xff, (val >> 8) & 0xff);
        mutex_unlock(&codec->spdif_mutex);
        return change;
}

#define snd_hda_spdif_out_switch_info   snd_ctl_boolean_mono_info

static int snd_hda_spdif_out_switch_get(struct snd_kcontrol *kcontrol,
                                        struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        int idx = kcontrol->private_value;
        struct hda_spdif_out *spdif;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        ucontrol->value.integer.value[0] = spdif->ctls & AC_DIG1_ENABLE;
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}

static inline void set_spdif_ctls(struct hda_codec *codec, hda_nid_t nid,
                                  int dig1, int dig2)
{
        set_dig_out_convert(codec, nid, dig1, dig2);
        /* unmute amp switch (if any) */
        if ((get_wcaps(codec, nid) & AC_WCAP_OUT_AMP) &&
            (dig1 & AC_DIG1_ENABLE))
                snd_hda_codec_amp_stereo(codec, nid, HDA_OUTPUT, 0,
                                            HDA_AMP_MUTE, 0);
}

static int snd_hda_spdif_out_switch_put(struct snd_kcontrol *kcontrol,
                                        struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        int idx = kcontrol->private_value;
        struct hda_spdif_out *spdif;
        hda_nid_t nid;
        unsigned short val;
        int change;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        nid = spdif->nid;
        val = spdif->ctls & ~AC_DIG1_ENABLE;
        if (ucontrol->value.integer.value[0])
                val |= AC_DIG1_ENABLE;
        change = spdif->ctls != val;
        spdif->ctls = val;
        if (change && nid != (u16)-1)
                set_spdif_ctls(codec, nid, val & 0xff, -1);
        mutex_unlock(&codec->spdif_mutex);
        return change;
}

static struct snd_kcontrol_new dig_mixes[] = {
        {
                .access = SNDRV_CTL_ELEM_ACCESS_READ,
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
                .info = snd_hda_spdif_mask_info,
                .get = snd_hda_spdif_cmask_get,
        },
        {
                .access = SNDRV_CTL_ELEM_ACCESS_READ,
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PRO_MASK),
                .info = snd_hda_spdif_mask_info,
                .get = snd_hda_spdif_pmask_get,
        },
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
                .info = snd_hda_spdif_mask_info,
                .get = snd_hda_spdif_default_get,
                .put = snd_hda_spdif_default_put,
        },
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
                .info = snd_hda_spdif_out_switch_info,
                .get = snd_hda_spdif_out_switch_get,
                .put = snd_hda_spdif_out_switch_put,
        },
        { } /* end */
};

/**
 * snd_hda_create_dig_out_ctls - create Output SPDIF-related controls
 * @codec: the HDA codec
 * @associated_nid: NID that new ctls associated with
 * @cvt_nid: converter NID
 * @type: HDA_PCM_TYPE_*
 * Creates controls related with the digital output.
 * Called from each patch supporting the digital out.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_create_dig_out_ctls(struct hda_codec *codec,
                                hda_nid_t associated_nid,
                                hda_nid_t cvt_nid,
                                int type)
{
        int err;
        struct snd_kcontrol *kctl;
        struct snd_kcontrol_new *dig_mix;
        int idx = 0;
        const int spdif_index = 16;
        struct hda_spdif_out *spdif;
        struct hda_bus *bus = codec->bus;

        if (bus->primary_dig_out_type == HDA_PCM_TYPE_HDMI &&
            type == HDA_PCM_TYPE_SPDIF) {
                idx = spdif_index;
        } else if (bus->primary_dig_out_type == HDA_PCM_TYPE_SPDIF &&
                   type == HDA_PCM_TYPE_HDMI) {
                /* suppose a single SPDIF device */
                for (dig_mix = dig_mixes; dig_mix->name; dig_mix++) {
                        kctl = find_mixer_ctl(codec, dig_mix->name, 0, 0);
                        if (!kctl)
                                break;
                        kctl->id.index = spdif_index;
                }
                bus->primary_dig_out_type = HDA_PCM_TYPE_HDMI;
        }
        if (!bus->primary_dig_out_type)
                bus->primary_dig_out_type = type;

        idx = find_empty_mixer_ctl_idx(codec, "IEC958 Playback Switch", idx);
        if (idx < 0) {
                codec_err(codec, "too many IEC958 outputs\n");
                return -EBUSY;
        }
        spdif = snd_array_new(&codec->spdif_out);
        if (!spdif)
                return -ENOMEM;
        for (dig_mix = dig_mixes; dig_mix->name; dig_mix++) {
                kctl = snd_ctl_new1(dig_mix, codec);
                if (!kctl)
                        return -ENOMEM;
                kctl->id.index = idx;
                kctl->private_value = codec->spdif_out.used - 1;
                err = snd_hda_ctl_add(codec, associated_nid, kctl);
                if (err < 0)
                        return err;
        }
        spdif->nid = cvt_nid;
        spdif->ctls = snd_hda_codec_read(codec, cvt_nid, 0,
                                         AC_VERB_GET_DIGI_CONVERT_1, 0);
        spdif->status = convert_to_spdif_status(spdif->ctls);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_create_dig_out_ctls);

/**
 * snd_hda_spdif_out_of_nid - get the hda_spdif_out entry from the given NID
 * @codec: the HDA codec
 * @nid: widget NID
 *
 * call within spdif_mutex lock
 */
struct hda_spdif_out *snd_hda_spdif_out_of_nid(struct hda_codec *codec,
                                               hda_nid_t nid)
{
        int i;
        for (i = 0; i < codec->spdif_out.used; i++) {
                struct hda_spdif_out *spdif =
                                snd_array_elem(&codec->spdif_out, i);
                if (spdif->nid == nid)
                        return spdif;
        }
        return NULL;
}
EXPORT_SYMBOL_GPL(snd_hda_spdif_out_of_nid);

/**
 * snd_hda_spdif_ctls_unassign - Unassign the given SPDIF ctl
 * @codec: the HDA codec
 * @idx: the SPDIF ctl index
 *
 * Unassign the widget from the given SPDIF control.
 */
void snd_hda_spdif_ctls_unassign(struct hda_codec *codec, int idx)
{
        struct hda_spdif_out *spdif;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        spdif->nid = (u16)-1;
        mutex_unlock(&codec->spdif_mutex);
}
EXPORT_SYMBOL_GPL(snd_hda_spdif_ctls_unassign);

/**
 * snd_hda_spdif_ctls_assign - Assign the SPDIF controls to the given NID
 * @codec: the HDA codec
 * @idx: the SPDIF ctl idx
 * @nid: widget NID
 *
 * Assign the widget to the SPDIF control with the given index.
 */
void snd_hda_spdif_ctls_assign(struct hda_codec *codec, int idx, hda_nid_t nid)
{
        struct hda_spdif_out *spdif;
        unsigned short val;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_array_elem(&codec->spdif_out, idx);
        if (spdif->nid != nid) {
                spdif->nid = nid;
                val = spdif->ctls;
                set_spdif_ctls(codec, nid, val & 0xff, (val >> 8) & 0xff);
        }
        mutex_unlock(&codec->spdif_mutex);
}
EXPORT_SYMBOL_GPL(snd_hda_spdif_ctls_assign);

/*
 * SPDIF sharing with analog output
 */
static int spdif_share_sw_get(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        struct hda_multi_out *mout = snd_kcontrol_chip(kcontrol);
        ucontrol->value.integer.value[0] = mout->share_spdif;
        return 0;
}

static int spdif_share_sw_put(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        struct hda_multi_out *mout = snd_kcontrol_chip(kcontrol);
        mout->share_spdif = !!ucontrol->value.integer.value[0];
        return 0;
}

static struct snd_kcontrol_new spdif_share_sw = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "IEC958 Default PCM Playback Switch",
        .info = snd_ctl_boolean_mono_info,
        .get = spdif_share_sw_get,
        .put = spdif_share_sw_put,
};

/**
 * snd_hda_create_spdif_share_sw - create Default PCM switch
 * @codec: the HDA codec
 * @mout: multi-out instance
 */
int snd_hda_create_spdif_share_sw(struct hda_codec *codec,
                                  struct hda_multi_out *mout)
{
        struct snd_kcontrol *kctl;

        if (!mout->dig_out_nid)
                return 0;

        kctl = snd_ctl_new1(&spdif_share_sw, mout);
        if (!kctl)
                return -ENOMEM;
        /* ATTENTION: here mout is passed as private_data, instead of codec */
        return snd_hda_ctl_add(codec, mout->dig_out_nid, kctl);
}
EXPORT_SYMBOL_GPL(snd_hda_create_spdif_share_sw);

/*
 * SPDIF input
 */

#define snd_hda_spdif_in_switch_info    snd_hda_spdif_out_switch_info

static int snd_hda_spdif_in_switch_get(struct snd_kcontrol *kcontrol,
                                       struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);

        ucontrol->value.integer.value[0] = codec->spdif_in_enable;
        return 0;
}

static int snd_hda_spdif_in_switch_put(struct snd_kcontrol *kcontrol,
                                       struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned int val = !!ucontrol->value.integer.value[0];
        int change;

        mutex_lock(&codec->spdif_mutex);
        change = codec->spdif_in_enable != val;
        if (change) {
                codec->spdif_in_enable = val;
                snd_hda_codec_write_cache(codec, nid, 0,
                                          AC_VERB_SET_DIGI_CONVERT_1, val);
        }
        mutex_unlock(&codec->spdif_mutex);
        return change;
}

static int snd_hda_spdif_in_status_get(struct snd_kcontrol *kcontrol,
                                       struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned short val;
        unsigned int sbits;

        val = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_DIGI_CONVERT_1, 0);
        sbits = convert_to_spdif_status(val);
        ucontrol->value.iec958.status[0] = sbits;
        ucontrol->value.iec958.status[1] = sbits >> 8;
        ucontrol->value.iec958.status[2] = sbits >> 16;
        ucontrol->value.iec958.status[3] = sbits >> 24;
        return 0;
}

static struct snd_kcontrol_new dig_in_ctls[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, SWITCH),
                .info = snd_hda_spdif_in_switch_info,
                .get = snd_hda_spdif_in_switch_get,
                .put = snd_hda_spdif_in_switch_put,
        },
        {
                .access = SNDRV_CTL_ELEM_ACCESS_READ,
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
                .info = snd_hda_spdif_mask_info,
                .get = snd_hda_spdif_in_status_get,
        },
        { } /* end */
};

/**
 * snd_hda_create_spdif_in_ctls - create Input SPDIF-related controls
 * @codec: the HDA codec
 * @nid: audio in widget NID
 *
 * Creates controls related with the SPDIF input.
 * Called from each patch supporting the SPDIF in.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid)
{
        int err;
        struct snd_kcontrol *kctl;
        struct snd_kcontrol_new *dig_mix;
        int idx;

        idx = find_empty_mixer_ctl_idx(codec, "IEC958 Capture Switch", 0);
        if (idx < 0) {
                codec_err(codec, "too many IEC958 inputs\n");
                return -EBUSY;
        }
        for (dig_mix = dig_in_ctls; dig_mix->name; dig_mix++) {
                kctl = snd_ctl_new1(dig_mix, codec);
                if (!kctl)
                        return -ENOMEM;
                kctl->private_value = nid;
                err = snd_hda_ctl_add(codec, nid, kctl);
                if (err < 0)
                        return err;
        }
        codec->spdif_in_enable =
                snd_hda_codec_read(codec, nid, 0,
                                   AC_VERB_GET_DIGI_CONVERT_1, 0) &
                AC_DIG1_ENABLE;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_create_spdif_in_ctls);

/*
 * command cache
 */

/* build a 31bit cache key with the widget id and the command parameter */
#define build_cmd_cache_key(nid, verb)  ((verb << 8) | nid)
#define get_cmd_cache_nid(key)          ((key) & 0xff)
#define get_cmd_cache_cmd(key)          (((key) >> 8) & 0xffff)

/**
 * snd_hda_codec_write_cache - send a single command with caching
 * @codec: the HDA codec
 * @nid: NID to send the command
 * @flags: optional bit flags
 * @verb: the verb to send
 * @parm: the parameter for the verb
 *
 * Send a single command without waiting for response.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,
                              int flags, unsigned int verb, unsigned int parm)
{
        int err;
        struct hda_cache_head *c;
        u32 key;
        unsigned int cache_only;

        cache_only = codec->cached_write;
        if (!cache_only) {
                err = snd_hda_codec_write(codec, nid, flags, verb, parm);
                if (err < 0)
                        return err;
        }

        /* parm may contain the verb stuff for get/set amp */
        verb = verb | (parm >> 8);
        parm &= 0xff;
        key = build_cmd_cache_key(nid, verb);
        mutex_lock(&codec->bus->core.cmd_mutex);
        c = get_alloc_hash(&codec->cmd_cache, key);
        if (c) {
                c->val = parm;
                c->dirty = cache_only;
        }
        mutex_unlock(&codec->bus->core.cmd_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_write_cache);

/**
 * snd_hda_codec_update_cache - check cache and write the cmd only when needed
 * @codec: the HDA codec
 * @nid: NID to send the command
 * @flags: optional bit flags
 * @verb: the verb to send
 * @parm: the parameter for the verb
 *
 * This function works like snd_hda_codec_write_cache(), but it doesn't send
 * command if the parameter is already identical with the cached value.
 * If not, it sends the command and refreshes the cache.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_codec_update_cache(struct hda_codec *codec, hda_nid_t nid,
                               int flags, unsigned int verb, unsigned int parm)
{
        struct hda_cache_head *c;
        u32 key;

        /* parm may contain the verb stuff for get/set amp */
        verb = verb | (parm >> 8);
        parm &= 0xff;
        key = build_cmd_cache_key(nid, verb);
        mutex_lock(&codec->bus->core.cmd_mutex);
        c = get_hash(&codec->cmd_cache, key);
        if (c && c->val == parm) {
                mutex_unlock(&codec->bus->core.cmd_mutex);
                return 0;
        }
        mutex_unlock(&codec->bus->core.cmd_mutex);
        return snd_hda_codec_write_cache(codec, nid, flags, verb, parm);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_update_cache);

/**
 * snd_hda_codec_resume_cache - Resume the all commands from the cache
 * @codec: HD-audio codec
 *
 * Execute all verbs recorded in the command caches to resume.
 */
void snd_hda_codec_resume_cache(struct hda_codec *codec)
{
        int i;

        mutex_lock(&codec->hash_mutex);
        codec->cached_write = 0;
        for (i = 0; i < codec->cmd_cache.buf.used; i++) {
                struct hda_cache_head *buffer;
                u32 key;

                buffer = snd_array_elem(&codec->cmd_cache.buf, i);
                key = buffer->key;
                if (!key)
                        continue;
                if (!buffer->dirty)
                        continue;
                buffer->dirty = 0;
                mutex_unlock(&codec->hash_mutex);
                snd_hda_codec_write(codec, get_cmd_cache_nid(key), 0,
                                    get_cmd_cache_cmd(key), buffer->val);
                mutex_lock(&codec->hash_mutex);
        }
        mutex_unlock(&codec->hash_mutex);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_resume_cache);

/**
 * snd_hda_sequence_write_cache - sequence writes with caching
 * @codec: the HDA codec
 * @seq: VERB array to send
 *
 * Send the commands sequentially from the given array.
 * Thte commands are recorded on cache for power-save and resume.
 * The array must be terminated with NID=0.
 */
void snd_hda_sequence_write_cache(struct hda_codec *codec,
                                  const struct hda_verb *seq)
{
        for (; seq->nid; seq++)
                snd_hda_codec_write_cache(codec, seq->nid, 0, seq->verb,
                                          seq->param);
}
EXPORT_SYMBOL_GPL(snd_hda_sequence_write_cache);

/**
 * snd_hda_codec_flush_cache - Execute all pending (cached) amps / verbs
 * @codec: HD-audio codec
 */
void snd_hda_codec_flush_cache(struct hda_codec *codec)
{
        snd_hda_codec_resume_amp(codec);
        snd_hda_codec_resume_cache(codec);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_flush_cache);

/**
 * snd_hda_codec_set_power_to_all - Set the power state to all widgets
 * @codec: the HDA codec
 * @fg: function group (not used now)
 * @power_state: the power state to set (AC_PWRST_*)
 *
 * Set the given power state to all widgets that have the power control.
 * If the codec has power_filter set, it evaluates the power state and
 * filter out if it's unchanged as D3.
 */
void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg,
                                    unsigned int power_state)
{
        hda_nid_t nid;

        for_each_hda_codec_node(nid, codec) {
                unsigned int wcaps = get_wcaps(codec, nid);
                unsigned int state = power_state;
                if (!(wcaps & AC_WCAP_POWER))
                        continue;
                if (codec->power_filter) {
                        state = codec->power_filter(codec, nid, power_state);
                        if (state != power_state && power_state == AC_PWRST_D3)
                                continue;
                }
                snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE,
                                    state);
        }
}
EXPORT_SYMBOL_GPL(snd_hda_codec_set_power_to_all);

/*
 * wait until the state is reached, returns the current state
 */
static unsigned int hda_sync_power_state(struct hda_codec *codec,
                                         hda_nid_t fg,
                                         unsigned int power_state)
{
        unsigned long end_time = jiffies + msecs_to_jiffies(500);
        unsigned int state, actual_state;

        for (;;) {
                state = snd_hda_codec_read(codec, fg, 0,
                                           AC_VERB_GET_POWER_STATE, 0);
                if (state & AC_PWRST_ERROR)
                        break;
                actual_state = (state >> 4) & 0x0f;
                if (actual_state == power_state)
                        break;
                if (time_after_eq(jiffies, end_time))
                        break;
                /* wait until the codec reachs to the target state */
                msleep(1);
        }
        return state;
}

/**
 * snd_hda_codec_eapd_power_filter - A power filter callback for EAPD
 * @codec: the HDA codec
 * @nid: widget NID
 * @power_state: power state to evalue
 *
 * Don't power down the widget if it controls eapd and EAPD_BTLENABLE is set.
 * This can be used a codec power_filter callback.
 */
unsigned int snd_hda_codec_eapd_power_filter(struct hda_codec *codec,
                                             hda_nid_t nid,
                                             unsigned int power_state)
{
        if (nid == codec->core.afg || nid == codec->core.mfg)
                return power_state;
        if (power_state == AC_PWRST_D3 &&
            get_wcaps_type(get_wcaps(codec, nid)) == AC_WID_PIN &&
            (snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD)) {
                int eapd = snd_hda_codec_read(codec, nid, 0,
                                              AC_VERB_GET_EAPD_BTLENABLE, 0);
                if (eapd & 0x02)
                        return AC_PWRST_D0;
        }
        return power_state;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_eapd_power_filter);

/*
 * set power state of the codec, and return the power state
 */
static unsigned int hda_set_power_state(struct hda_codec *codec,
                                        unsigned int power_state)
{
        hda_nid_t fg = codec->core.afg ? codec->core.afg : codec->core.mfg;
        int count;
        unsigned int state;
        int flags = 0;

        /* this delay seems necessary to avoid click noise at power-down */
        if (power_state == AC_PWRST_D3) {
                if (codec->depop_delay < 0)
                        msleep(codec_has_epss(codec) ? 10 : 100);
                else if (codec->depop_delay > 0)
                        msleep(codec->depop_delay);
                flags = HDA_RW_NO_RESPONSE_FALLBACK;
        }

        /* repeat power states setting at most 10 times*/
        for (count = 0; count < 10; count++) {
                if (codec->patch_ops.set_power_state)
                        codec->patch_ops.set_power_state(codec, fg,
                                                         power_state);
                else {
                        state = power_state;
                        if (codec->power_filter)
                                state = codec->power_filter(codec, fg, state);
                        if (state == power_state || power_state != AC_PWRST_D3)
                                snd_hda_codec_read(codec, fg, flags,
                                                   AC_VERB_SET_POWER_STATE,
                                                   state);
                        snd_hda_codec_set_power_to_all(codec, fg, power_state);
                }
                state = hda_sync_power_state(codec, fg, power_state);
                if (!(state & AC_PWRST_ERROR))
                        break;
        }

        return state;
}

/* sync power states of all widgets;
 * this is called at the end of codec parsing
 */
static void sync_power_up_states(struct hda_codec *codec)
{
        hda_nid_t nid;

        /* don't care if no filter is used */
        if (!codec->power_filter)
                return;

        for_each_hda_codec_node(nid, codec) {
                unsigned int wcaps = get_wcaps(codec, nid);
                unsigned int target;
                if (!(wcaps & AC_WCAP_POWER))
                        continue;
                target = codec->power_filter(codec, nid, AC_PWRST_D0);
                if (target == AC_PWRST_D0)
                        continue;
                if (!snd_hda_check_power_state(codec, nid, target))
                        snd_hda_codec_write(codec, nid, 0,
                                            AC_VERB_SET_POWER_STATE, target);
        }
}

#ifdef CONFIG_SND_HDA_RECONFIG
/* execute additional init verbs */
static void hda_exec_init_verbs(struct hda_codec *codec)
{
        if (codec->init_verbs.list)
                snd_hda_sequence_write(codec, codec->init_verbs.list);
}
#else
static inline void hda_exec_init_verbs(struct hda_codec *codec) {}
#endif

#ifdef CONFIG_PM
/* update the power on/off account with the current jiffies */
static void update_power_acct(struct hda_codec *codec, bool on)
{
        unsigned long delta = jiffies - codec->power_jiffies;

        if (on)
                codec->power_on_acct += delta;
        else
                codec->power_off_acct += delta;
        codec->power_jiffies += delta;
}

void snd_hda_update_power_acct(struct hda_codec *codec)
{
        update_power_acct(codec, hda_codec_is_power_on(codec));
}

/*
 * call suspend and power-down; used both from PM and power-save
 * this function returns the power state in the end
 */
static unsigned int hda_call_codec_suspend(struct hda_codec *codec)
{
        unsigned int state;

        atomic_inc(&codec->core.in_pm);

        if (codec->patch_ops.suspend)
                codec->patch_ops.suspend(codec);
        hda_cleanup_all_streams(codec);
        state = hda_set_power_state(codec, AC_PWRST_D3);
        update_power_acct(codec, true);
        atomic_dec(&codec->core.in_pm);
        return state;
}

/* mark all entries of cmd and amp caches dirty */
static void hda_mark_cmd_cache_dirty(struct hda_codec *codec)
{
        int i;
        for (i = 0; i < codec->cmd_cache.buf.used; i++) {
                struct hda_cache_head *cmd;
                cmd = snd_array_elem(&codec->cmd_cache.buf, i);
                cmd->dirty = 1;
        }
        for (i = 0; i < codec->amp_cache.buf.used; i++) {
                struct hda_amp_info *amp;
                amp = snd_array_elem(&codec->amp_cache.buf, i);
                amp->head.dirty = 1;
        }
}

/*
 * kick up codec; used both from PM and power-save
 */
static void hda_call_codec_resume(struct hda_codec *codec)
{
        atomic_inc(&codec->core.in_pm);

        hda_mark_cmd_cache_dirty(codec);

        codec->power_jiffies = jiffies;

        hda_set_power_state(codec, AC_PWRST_D0);
        restore_shutup_pins(codec);
        hda_exec_init_verbs(codec);
        snd_hda_jack_set_dirty_all(codec);
        if (codec->patch_ops.resume)
                codec->patch_ops.resume(codec);
        else {
                if (codec->patch_ops.init)
                        codec->patch_ops.init(codec);
                snd_hda_codec_resume_amp(codec);
                snd_hda_codec_resume_cache(codec);
        }

        if (codec->jackpoll_interval)
                hda_jackpoll_work(&codec->jackpoll_work.work);
        else
                snd_hda_jack_report_sync(codec);
        atomic_dec(&codec->core.in_pm);
}

static int hda_codec_runtime_suspend(struct device *dev)
{
        struct hda_codec *codec = dev_to_hda_codec(dev);
        struct hda_pcm *pcm;
        unsigned int state;

        cancel_delayed_work_sync(&codec->jackpoll_work);
        list_for_each_entry(pcm, &codec->pcm_list_head, list)
                snd_pcm_suspend_all(pcm->pcm);
        state = hda_call_codec_suspend(codec);
        if (codec_has_clkstop(codec) && codec_has_epss(codec) &&
            (state & AC_PWRST_CLK_STOP_OK))
                snd_hdac_codec_link_down(&codec->core);
        return 0;
}

static int hda_codec_runtime_resume(struct device *dev)
{
        struct hda_codec *codec = dev_to_hda_codec(dev);

        snd_hdac_codec_link_up(&codec->core);
        hda_call_codec_resume(codec);
        pm_runtime_mark_last_busy(dev);
        return 0;
}
#endif /* CONFIG_PM */

/* referred in hda_bind.c */
const struct dev_pm_ops hda_codec_driver_pm = {
        SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
                                pm_runtime_force_resume)
        SET_RUNTIME_PM_OPS(hda_codec_runtime_suspend, hda_codec_runtime_resume,
                           NULL)
};

/*
 * add standard channel maps if not specified
 */
static int add_std_chmaps(struct hda_codec *codec)
{
        struct hda_pcm *pcm;
        int str, err;

        list_for_each_entry(pcm, &codec->pcm_list_head, list) {
                for (str = 0; str < 2; str++) {
                        struct hda_pcm_stream *hinfo = &pcm->stream[str];
                        struct snd_pcm_chmap *chmap;
                        const struct snd_pcm_chmap_elem *elem;

                        if (pcm->own_chmap)
                                continue;
                        if (!pcm || !hinfo->substreams)
                                continue;
                        elem = hinfo->chmap ? hinfo->chmap : snd_pcm_std_chmaps;
                        err = snd_pcm_add_chmap_ctls(pcm->pcm, str, elem,
                                                     hinfo->channels_max,
                                                     0, &chmap);
                        if (err < 0)
                                return err;
                        chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
                }
        }
        return 0;
}

/* default channel maps for 2.1 speakers;
 * since HD-audio supports only stereo, odd number channels are omitted
 */
const struct snd_pcm_chmap_elem snd_pcm_2_1_chmaps[] = {
        { .channels = 2,
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
        { .channels = 4,
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
                   SNDRV_CHMAP_LFE, SNDRV_CHMAP_LFE } },
        { }
};
EXPORT_SYMBOL_GPL(snd_pcm_2_1_chmaps);

int snd_hda_codec_build_controls(struct hda_codec *codec)
{
        int err = 0;
        hda_exec_init_verbs(codec);
        /* continue to initialize... */
        if (codec->patch_ops.init)
                err = codec->patch_ops.init(codec);
        if (!err && codec->patch_ops.build_controls)
                err = codec->patch_ops.build_controls(codec);
        if (err < 0)
                return err;

        /* we create chmaps here instead of build_pcms */
        err = add_std_chmaps(codec);
        if (err < 0)
                return err;

        if (codec->jackpoll_interval)
                hda_jackpoll_work(&codec->jackpoll_work.work);
        else
                snd_hda_jack_report_sync(codec); /* call at the last init point */
        sync_power_up_states(codec);
        return 0;
}

/*
 * stream formats
 */
struct hda_rate_tbl {
        unsigned int hz;
        unsigned int alsa_bits;
        unsigned int hda_fmt;
};

/* rate = base * mult / div */
#define HDA_RATE(base, mult, div) \
        (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
         (((div) - 1) << AC_FMT_DIV_SHIFT))

static struct hda_rate_tbl rate_bits[] = {
        /* rate in Hz, ALSA rate bitmask, HDA format value */

        /* autodetected value used in snd_hda_query_supported_pcm */
        { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
        { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
        { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
        { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
        { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
        { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
        { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
        { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
        { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
        { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
        { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
#define AC_PAR_PCM_RATE_BITS    11
        /* up to bits 10, 384kHZ isn't supported properly */

        /* not autodetected value */
        { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },

        { 0 } /* terminator */
};

/**
 * snd_hda_calc_stream_format - calculate format bitset
 * @codec: HD-audio codec
 * @rate: the sample rate
 * @channels: the number of channels
 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 * @maxbps: the max. bps
 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 *
 * Calculate the format bitset from the given rate, channels and th PCM format.
 *
 * Return zero if invalid.
 */
unsigned int snd_hda_calc_stream_format(struct hda_codec *codec,
                                        unsigned int rate,
                                        unsigned int channels,
                                        unsigned int format,
                                        unsigned int maxbps,
                                        unsigned short spdif_ctls)
{
        int i;
        unsigned int val = 0;

        for (i = 0; rate_bits[i].hz; i++)
                if (rate_bits[i].hz == rate) {
                        val = rate_bits[i].hda_fmt;
                        break;
                }
        if (!rate_bits[i].hz) {
                codec_dbg(codec, "invalid rate %d\n", rate);
                return 0;
        }

        if (channels == 0 || channels > 8) {
                codec_dbg(codec, "invalid channels %d\n", channels);
                return 0;
        }
        val |= channels - 1;

        switch (snd_pcm_format_width(format)) {
        case 8:
                val |= AC_FMT_BITS_8;
                break;
        case 16:
                val |= AC_FMT_BITS_16;
                break;
        case 20:
        case 24:
        case 32:
                if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
                        val |= AC_FMT_BITS_32;
                else if (maxbps >= 24)
                        val |= AC_FMT_BITS_24;
                else
                        val |= AC_FMT_BITS_20;
                break;
        default:
                codec_dbg(codec, "invalid format width %d\n",
                          snd_pcm_format_width(format));
                return 0;
        }

        if (spdif_ctls & AC_DIG1_NONAUDIO)
                val |= AC_FMT_TYPE_NON_PCM;

        return val;
}
EXPORT_SYMBOL_GPL(snd_hda_calc_stream_format);

static unsigned int get_pcm_param(struct hda_codec *codec, hda_nid_t nid,
                                  int dir)
{
        unsigned int val = 0;
        if (nid != codec->core.afg &&
            (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
                val = snd_hda_param_read(codec, nid, AC_PAR_PCM);
        if (!val || val == -1)
                val = snd_hda_param_read(codec, codec->core.afg, AC_PAR_PCM);
        if (!val || val == -1)
                return 0;
        return val;
}

static unsigned int query_pcm_param(struct hda_codec *codec, hda_nid_t nid)
{
        return query_caps_hash(codec, nid, 0, HDA_HASH_PARPCM_KEY(nid),
                               get_pcm_param);
}

static unsigned int get_stream_param(struct hda_codec *codec, hda_nid_t nid,
                                     int dir)
{
        unsigned int streams = snd_hda_param_read(codec, nid, AC_PAR_STREAM);
        if (!streams || streams == -1)
                streams = snd_hda_param_read(codec, codec->core.afg, AC_PAR_STREAM);
        if (!streams || streams == -1)
                return 0;
        return streams;
}

static unsigned int query_stream_param(struct hda_codec *codec, hda_nid_t nid)
{
        return query_caps_hash(codec, nid, 0, HDA_HASH_PARSTR_KEY(nid),
                               get_stream_param);
}

/**
 * snd_hda_query_supported_pcm - query the supported PCM rates and formats
 * @codec: the HDA codec
 * @nid: NID to query
 * @ratesp: the pointer to store the detected rate bitflags
 * @formatsp: the pointer to store the detected formats
 * @bpsp: the pointer to store the detected format widths
 *
 * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 * or @bsps argument is ignored.
 *
 * Returns 0 if successful, otherwise a negative error code.
 */
int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
                                u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
{
        unsigned int i, val, wcaps;

        wcaps = get_wcaps(codec, nid);
        val = query_pcm_param(codec, nid);

        if (ratesp) {
                u32 rates = 0;
                for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
                        if (val & (1 << i))
                                rates |= rate_bits[i].alsa_bits;
                }
                if (rates == 0) {
                        codec_err(codec,
                                  "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
                                  nid, val,
                                  (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
                        return -EIO;
                }
                *ratesp = rates;
        }

        if (formatsp || bpsp) {
                u64 formats = 0;
                unsigned int streams, bps;

                streams = query_stream_param(codec, nid);
                if (!streams)
                        return -EIO;

                bps = 0;
                if (streams & AC_SUPFMT_PCM) {
                        if (val & AC_SUPPCM_BITS_8) {
                                formats |= SNDRV_PCM_FMTBIT_U8;
                                bps = 8;
                        }
                        if (val & AC_SUPPCM_BITS_16) {
                                formats |= SNDRV_PCM_FMTBIT_S16_LE;
                                bps = 16;
                        }
                        if (wcaps & AC_WCAP_DIGITAL) {
                                if (val & AC_SUPPCM_BITS_32)
                                        formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
                                if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
                                        formats |= SNDRV_PCM_FMTBIT_S32_LE;
                                if (val & AC_SUPPCM_BITS_24)
                                        bps = 24;
                                else if (val & AC_SUPPCM_BITS_20)
                                        bps = 20;
                        } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
                                          AC_SUPPCM_BITS_32)) {
                                formats |= SNDRV_PCM_FMTBIT_S32_LE;
                                if (val & AC_SUPPCM_BITS_32)
                                        bps = 32;
                                else if (val & AC_SUPPCM_BITS_24)
                                        bps = 24;
                                else if (val & AC_SUPPCM_BITS_20)
                                        bps = 20;
                        }
                }
#if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
                if (streams & AC_SUPFMT_FLOAT32) {
                        formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
                        if (!bps)
                                bps = 32;
                }
#endif
                if (streams == AC_SUPFMT_AC3) {
                        /* should be exclusive */
                        /* temporary hack: we have still no proper support
                         * for the direct AC3 stream...
                         */
                        formats |= SNDRV_PCM_FMTBIT_U8;
                        bps = 8;
                }
                if (formats == 0) {
                        codec_err(codec,
                                  "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
                                  nid, val,
                                  (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
                                  streams);
                        return -EIO;
                }
                if (formatsp)
                        *formatsp = formats;
                if (bpsp)
                        *bpsp = bps;
        }

        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_query_supported_pcm);

/**
 * snd_hda_is_supported_format - Check the validity of the format
 * @codec: HD-audio codec
 * @nid: NID to check
 * @format: the HD-audio format value to check
 *
 * Check whether the given node supports the format value.
 *
 * Returns 1 if supported, 0 if not.
 */
int snd_hda_is_supported_format(struct hda_codec *codec, hda_nid_t nid,
                                unsigned int format)
{
        int i;
        unsigned int val = 0, rate, stream;

        val = query_pcm_param(codec, nid);
        if (!val)
                return 0;

        rate = format & 0xff00;
        for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
                if (rate_bits[i].hda_fmt == rate) {
                        if (val & (1 << i))
                                break;
                        return 0;
                }
        if (i >= AC_PAR_PCM_RATE_BITS)
                return 0;

        stream = query_stream_param(codec, nid);
        if (!stream)
                return 0;

        if (stream & AC_SUPFMT_PCM) {
                switch (format & 0xf0) {
                case 0x00:
                        if (!(val & AC_SUPPCM_BITS_8))
                                return 0;
                        break;
                case 0x10:
                        if (!(val & AC_SUPPCM_BITS_16))
                                return 0;
                        break;
                case 0x20:
                        if (!(val & AC_SUPPCM_BITS_20))
                                return 0;
                        break;
                case 0x30:
                        if (!(val & AC_SUPPCM_BITS_24))
                                return 0;
                        break;
                case 0x40:
                        if (!(val & AC_SUPPCM_BITS_32))
                                return 0;
                        break;
                default:
                        return 0;
                }
        } else {
                /* FIXME: check for float32 and AC3? */
        }

        return 1;
}
EXPORT_SYMBOL_GPL(snd_hda_is_supported_format);

/*
 * PCM stuff
 */
static int hda_pcm_default_open_close(struct hda_pcm_stream *hinfo,
                                      struct hda_codec *codec,
                                      struct snd_pcm_substream *substream)
{
        return 0;
}

static int hda_pcm_default_prepare(struct hda_pcm_stream *hinfo,
                                   struct hda_codec *codec,
                                   unsigned int stream_tag,
                                   unsigned int format,
                                   struct snd_pcm_substream *substream)
{
        snd_hda_codec_setup_stream(codec, hinfo->nid, stream_tag, 0, format);
        return 0;
}

static int hda_pcm_default_cleanup(struct hda_pcm_stream *hinfo,
                                   struct hda_codec *codec,
                                   struct snd_pcm_substream *substream)
{
        snd_hda_codec_cleanup_stream(codec, hinfo->nid);
        return 0;
}

static int set_pcm_default_values(struct hda_codec *codec,
                                  struct hda_pcm_stream *info)
{
        int err;

        /* query support PCM information from the given NID */
        if (info->nid && (!info->rates || !info->formats)) {
                err = snd_hda_query_supported_pcm(codec, info->nid,
                                info->rates ? NULL : &info->rates,
                                info->formats ? NULL : &info->formats,
                                info->maxbps ? NULL : &info->maxbps);
                if (err < 0)
                        return err;
        }
        if (info->ops.open == NULL)
                info->ops.open = hda_pcm_default_open_close;
        if (info->ops.close == NULL)
                info->ops.close = hda_pcm_default_open_close;
        if (info->ops.prepare == NULL) {
                if (snd_BUG_ON(!info->nid))
                        return -EINVAL;
                info->ops.prepare = hda_pcm_default_prepare;
        }
        if (info->ops.cleanup == NULL) {
                if (snd_BUG_ON(!info->nid))
                        return -EINVAL;
                info->ops.cleanup = hda_pcm_default_cleanup;
        }
        return 0;
}

/*
 * codec prepare/cleanup entries
 */
/**
 * snd_hda_codec_prepare - Prepare a stream
 * @codec: the HDA codec
 * @hinfo: PCM information
 * @stream: stream tag to assign
 * @format: format id to assign
 * @substream: PCM substream to assign
 *
 * Calls the prepare callback set by the codec with the given arguments.
 * Clean up the inactive streams when successful.
 */
int snd_hda_codec_prepare(struct hda_codec *codec,
                          struct hda_pcm_stream *hinfo,
                          unsigned int stream,
                          unsigned int format,
                          struct snd_pcm_substream *substream)
{
        int ret;
        mutex_lock(&codec->bus->prepare_mutex);
        if (hinfo->ops.prepare)
                ret = hinfo->ops.prepare(hinfo, codec, stream, format,
                                         substream);
        else
                ret = -ENODEV;
        if (ret >= 0)
                purify_inactive_streams(codec);
        mutex_unlock(&codec->bus->prepare_mutex);
        return ret;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_prepare);

/**
 * snd_hda_codec_cleanup - Prepare a stream
 * @codec: the HDA codec
 * @hinfo: PCM information
 * @substream: PCM substream
 *
 * Calls the cleanup callback set by the codec with the given arguments.
 */
void snd_hda_codec_cleanup(struct hda_codec *codec,
                           struct hda_pcm_stream *hinfo,
                           struct snd_pcm_substream *substream)
{
        mutex_lock(&codec->bus->prepare_mutex);
        if (hinfo->ops.cleanup)
                hinfo->ops.cleanup(hinfo, codec, substream);
        mutex_unlock(&codec->bus->prepare_mutex);
}
EXPORT_SYMBOL_GPL(snd_hda_codec_cleanup);

/* global */
const char *snd_hda_pcm_type_name[HDA_PCM_NTYPES] = {
        "Audio", "SPDIF", "HDMI", "Modem"
};

/*
 * get the empty PCM device number to assign
 */
static int get_empty_pcm_device(struct hda_bus *bus, unsigned int type)
{
        /* audio device indices; not linear to keep compatibility */
        /* assigned to static slots up to dev#10; if more needed, assign
         * the later slot dynamically (when CONFIG_SND_DYNAMIC_MINORS=y)
         */
        static int audio_idx[HDA_PCM_NTYPES][5] = {
                [HDA_PCM_TYPE_AUDIO] = { 0, 2, 4, 5, -1 },
                [HDA_PCM_TYPE_SPDIF] = { 1, -1 },
                [HDA_PCM_TYPE_HDMI]  = { 3, 7, 8, 9, -1 },
                [HDA_PCM_TYPE_MODEM] = { 6, -1 },
        };
        int i;

        if (type >= HDA_PCM_NTYPES) {
                dev_err(bus->card->dev, "Invalid PCM type %d\n", type);
                return -EINVAL;
        }

        for (i = 0; audio_idx[type][i] >= 0; i++) {
#ifndef CONFIG_SND_DYNAMIC_MINORS
                if (audio_idx[type][i] >= 8)
                        break;
#endif
                if (!test_and_set_bit(audio_idx[type][i], bus->pcm_dev_bits))
                        return audio_idx[type][i];
        }

#ifdef CONFIG_SND_DYNAMIC_MINORS
        /* non-fixed slots starting from 10 */
        for (i = 10; i < 32; i++) {
                if (!test_and_set_bit(i, bus->pcm_dev_bits))
                        return i;
        }
#endif

        dev_warn(bus->card->dev, "Too many %s devices\n",
                snd_hda_pcm_type_name[type]);
#ifndef CONFIG_SND_DYNAMIC_MINORS
        dev_warn(bus->card->dev,
                 "Consider building the kernel with CONFIG_SND_DYNAMIC_MINORS=y\n");
#endif
        return -EAGAIN;
}

/* call build_pcms ops of the given codec and set up the default parameters */
int snd_hda_codec_parse_pcms(struct hda_codec *codec)
{
        struct hda_pcm *cpcm;
        int err;

        if (!list_empty(&codec->pcm_list_head))
                return 0; /* already parsed */

        if (!codec->patch_ops.build_pcms)
                return 0;

        err = codec->patch_ops.build_pcms(codec);
        if (err < 0) {
                codec_err(codec, "cannot build PCMs for #%d (error %d)\n",
                          codec->core.addr, err);
                return err;
        }

        list_for_each_entry(cpcm, &codec->pcm_list_head, list) {
                int stream;

                for (stream = 0; stream < 2; stream++) {
                        struct hda_pcm_stream *info = &cpcm->stream[stream];

                        if (!info->substreams)
                                continue;
                        err = set_pcm_default_values(codec, info);
                        if (err < 0) {
                                codec_warn(codec,
                                           "fail to setup default for PCM %s\n",
                                           cpcm->name);
                                return err;
                        }
                }
        }

        return 0;
}

/* assign all PCMs of the given codec */
int snd_hda_codec_build_pcms(struct hda_codec *codec)
{
        struct hda_bus *bus = codec->bus;
        struct hda_pcm *cpcm;
        int dev, err;

        if (snd_BUG_ON(!bus->ops.attach_pcm))
                return -EINVAL;

        err = snd_hda_codec_parse_pcms(codec);
        if (err < 0) {
                snd_hda_codec_reset(codec);
                return err;
        }

        /* attach a new PCM streams */
        list_for_each_entry(cpcm, &codec->pcm_list_head, list) {
                if (cpcm->pcm)
                        continue; /* already attached */
                if (!cpcm->stream[0].substreams && !cpcm->stream[1].substreams)
                        continue; /* no substreams assigned */

                dev = get_empty_pcm_device(bus, cpcm->pcm_type);
                if (dev < 0)
                        continue; /* no fatal error */
                cpcm->device = dev;
                err =  bus->ops.attach_pcm(bus, codec, cpcm);
                if (err < 0) {
                        codec_err(codec,
                                  "cannot attach PCM stream %d for codec #%d\n",
                                  dev, codec->core.addr);
                        continue; /* no fatal error */
                }
        }

        return 0;
}

/**
 * snd_hda_add_new_ctls - create controls from the array
 * @codec: the HDA codec
 * @knew: the array of struct snd_kcontrol_new
 *
 * This helper function creates and add new controls in the given array.
 * The array must be terminated with an empty entry as terminator.
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hda_add_new_ctls(struct hda_codec *codec,
                         const struct snd_kcontrol_new *knew)
{
        int err;

        for (; knew->name; knew++) {
                struct snd_kcontrol *kctl;
                int addr = 0, idx = 0;
                if (knew->iface == -1)  /* skip this codec private value */
                        continue;
                for (;;) {
                        kctl = snd_ctl_new1(knew, codec);
                        if (!kctl)
                                return -ENOMEM;
                        if (addr > 0)
                                kctl->id.device = addr;
                        if (idx > 0)
                                kctl->id.index = idx;
                        err = snd_hda_ctl_add(codec, 0, kctl);
                        if (!err)
                                break;
                        /* try first with another device index corresponding to
                         * the codec addr; if it still fails (or it's the
                         * primary codec), then try another control index
                         */
                        if (!addr && codec->core.addr)
                                addr = codec->core.addr;
                        else if (!idx && !knew->index) {
                                idx = find_empty_mixer_ctl_idx(codec,
                                                               knew->name, 0);
                                if (idx <= 0)
                                        return err;
                        } else
                                return err;
                }
        }
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_add_new_ctls);

#ifdef CONFIG_PM
static void codec_set_power_save(struct hda_codec *codec, int delay)
{
        struct device *dev = hda_codec_dev(codec);

        if (delay > 0) {
                pm_runtime_set_autosuspend_delay(dev, delay);
                pm_runtime_use_autosuspend(dev);
                pm_runtime_allow(dev);
                if (!pm_runtime_suspended(dev))
                        pm_runtime_mark_last_busy(dev);
        } else {
                pm_runtime_dont_use_autosuspend(dev);
                pm_runtime_forbid(dev);
        }
}

/**
 * snd_hda_set_power_save - reprogram autosuspend for the given delay
 * @bus: HD-audio bus
 * @delay: autosuspend delay in msec, 0 = off
 *
 * Synchronize the runtime PM autosuspend state from the power_save option.
 */
void snd_hda_set_power_save(struct hda_bus *bus, int delay)
{
        struct hda_codec *c;

        list_for_each_codec(c, bus)
                codec_set_power_save(c, delay);
}
EXPORT_SYMBOL_GPL(snd_hda_set_power_save);

/**
 * snd_hda_check_amp_list_power - Check the amp list and update the power
 * @codec: HD-audio codec
 * @check: the object containing an AMP list and the status
 * @nid: NID to check / update
 *
 * Check whether the given NID is in the amp list.  If it's in the list,
 * check the current AMP status, and update the the power-status according
 * to the mute status.
 *
 * This function is supposed to be set or called from the check_power_status
 * patch ops.
 */
int snd_hda_check_amp_list_power(struct hda_codec *codec,
                                 struct hda_loopback_check *check,
                                 hda_nid_t nid)
{
        const struct hda_amp_list *p;
        int ch, v;

        if (!check->amplist)
                return 0;
        for (p = check->amplist; p->nid; p++) {
                if (p->nid == nid)
                        break;
        }
        if (!p->nid)
                return 0; /* nothing changed */

        for (p = check->amplist; p->nid; p++) {
                for (ch = 0; ch < 2; ch++) {
                        v = snd_hda_codec_amp_read(codec, p->nid, ch, p->dir,
                                                   p->idx);
                        if (!(v & HDA_AMP_MUTE) && v > 0) {
                                if (!check->power_on) {
                                        check->power_on = 1;
                                        snd_hda_power_up(codec);
                                }
                                return 1;
                        }
                }
        }
        if (check->power_on) {
                check->power_on = 0;
                snd_hda_power_down(codec);
        }
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_check_amp_list_power);
#endif

/*
 * input MUX helper
 */

/**
 * snd_hda_input_mux_info_info - Info callback helper for the input-mux enum
 * @imux: imux helper object
 * @uinfo: pointer to get/store the data
 */
int snd_hda_input_mux_info(const struct hda_input_mux *imux,
                           struct snd_ctl_elem_info *uinfo)
{
        unsigned int index;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items = imux->num_items;
        if (!imux->num_items)
                return 0;
        index = uinfo->value.enumerated.item;
        if (index >= imux->num_items)
                index = imux->num_items - 1;
        strcpy(uinfo->value.enumerated.name, imux->items[index].label);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_input_mux_info);

/**
 * snd_hda_input_mux_info_put - Put callback helper for the input-mux enum
 * @codec: the HDA codec
 * @imux: imux helper object
 * @ucontrol: pointer to get/store the data
 * @nid: input mux NID
 * @cur_val: pointer to get/store the current imux value
 */
int snd_hda_input_mux_put(struct hda_codec *codec,
                          const struct hda_input_mux *imux,
                          struct snd_ctl_elem_value *ucontrol,
                          hda_nid_t nid,
                          unsigned int *cur_val)
{
        unsigned int idx;

        if (!imux->num_items)
                return 0;
        idx = ucontrol->value.enumerated.item[0];
        if (idx >= imux->num_items)
                idx = imux->num_items - 1;
        if (*cur_val == idx)
                return 0;
        snd_hda_codec_write_cache(codec, nid, 0, AC_VERB_SET_CONNECT_SEL,
                                  imux->items[idx].index);
        *cur_val = idx;
        return 1;
}
EXPORT_SYMBOL_GPL(snd_hda_input_mux_put);


/**
 * snd_hda_enum_helper_info - Helper for simple enum ctls
 * @kcontrol: ctl element
 * @uinfo: pointer to get/store the data
 * @num_items: number of enum items
 * @texts: enum item string array
 *
 * process kcontrol info callback of a simple string enum array
 * when @num_items is 0 or @texts is NULL, assume a boolean enum array
 */
int snd_hda_enum_helper_info(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_info *uinfo,
                             int num_items, const char * const *texts)
{
        static const char * const texts_default[] = {
                "Disabled", "Enabled"
        };

        if (!texts || !num_items) {
                num_items = 2;
                texts = texts_default;
        }

        return snd_ctl_enum_info(uinfo, 1, num_items, texts);
}
EXPORT_SYMBOL_GPL(snd_hda_enum_helper_info);

/*
 * Multi-channel / digital-out PCM helper functions
 */

/* setup SPDIF output stream */
static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid,
                                 unsigned int stream_tag, unsigned int format)
{
        struct hda_spdif_out *spdif;
        unsigned int curr_fmt;
        bool reset;

        spdif = snd_hda_spdif_out_of_nid(codec, nid);
        curr_fmt = snd_hda_codec_read(codec, nid, 0,
                                      AC_VERB_GET_STREAM_FORMAT, 0);
        reset = codec->spdif_status_reset &&
                (spdif->ctls & AC_DIG1_ENABLE) &&
                curr_fmt != format;

        /* turn off SPDIF if needed; otherwise the IEC958 bits won't be
           updated */
        if (reset)
                set_dig_out_convert(codec, nid,
                                    spdif->ctls & ~AC_DIG1_ENABLE & 0xff,
                                    -1);
        snd_hda_codec_setup_stream(codec, nid, stream_tag, 0, format);
        if (codec->slave_dig_outs) {
                const hda_nid_t *d;
                for (d = codec->slave_dig_outs; *d; d++)
                        snd_hda_codec_setup_stream(codec, *d, stream_tag, 0,
                                                   format);
        }
        /* turn on again (if needed) */
        if (reset)
                set_dig_out_convert(codec, nid,
                                    spdif->ctls & 0xff, -1);
}

static void cleanup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid)
{
        snd_hda_codec_cleanup_stream(codec, nid);
        if (codec->slave_dig_outs) {
                const hda_nid_t *d;
                for (d = codec->slave_dig_outs; *d; d++)
                        snd_hda_codec_cleanup_stream(codec, *d);
        }
}

/**
 * snd_hda_multi_out_dig_open - open the digital out in the exclusive mode
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 */
int snd_hda_multi_out_dig_open(struct hda_codec *codec,
                               struct hda_multi_out *mout)
{
        mutex_lock(&codec->spdif_mutex);
        if (mout->dig_out_used == HDA_DIG_ANALOG_DUP)
                /* already opened as analog dup; reset it once */
                cleanup_dig_out_stream(codec, mout->dig_out_nid);
        mout->dig_out_used = HDA_DIG_EXCLUSIVE;
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_dig_open);

/**
 * snd_hda_multi_out_dig_prepare - prepare the digital out stream
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 * @stream_tag: stream tag to assign
 * @format: format id to assign
 * @substream: PCM substream to assign
 */
int snd_hda_multi_out_dig_prepare(struct hda_codec *codec,
                                  struct hda_multi_out *mout,
                                  unsigned int stream_tag,
                                  unsigned int format,
                                  struct snd_pcm_substream *substream)
{
        mutex_lock(&codec->spdif_mutex);
        setup_dig_out_stream(codec, mout->dig_out_nid, stream_tag, format);
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_dig_prepare);

/**
 * snd_hda_multi_out_dig_cleanup - clean-up the digital out stream
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 */
int snd_hda_multi_out_dig_cleanup(struct hda_codec *codec,
                                  struct hda_multi_out *mout)
{
        mutex_lock(&codec->spdif_mutex);
        cleanup_dig_out_stream(codec, mout->dig_out_nid);
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_dig_cleanup);

/**
 * snd_hda_multi_out_dig_close - release the digital out stream
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 */
int snd_hda_multi_out_dig_close(struct hda_codec *codec,
                                struct hda_multi_out *mout)
{
        mutex_lock(&codec->spdif_mutex);
        mout->dig_out_used = 0;
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_dig_close);

/**
 * snd_hda_multi_out_analog_open - open analog outputs
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 * @substream: PCM substream to assign
 * @hinfo: PCM information to assign
 *
 * Open analog outputs and set up the hw-constraints.
 * If the digital outputs can be opened as slave, open the digital
 * outputs, too.
 */
int snd_hda_multi_out_analog_open(struct hda_codec *codec,
                                  struct hda_multi_out *mout,
                                  struct snd_pcm_substream *substream,
                                  struct hda_pcm_stream *hinfo)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        runtime->hw.channels_max = mout->max_channels;
        if (mout->dig_out_nid) {
                if (!mout->analog_rates) {
                        mout->analog_rates = hinfo->rates;
                        mout->analog_formats = hinfo->formats;
                        mout->analog_maxbps = hinfo->maxbps;
                } else {
                        runtime->hw.rates = mout->analog_rates;
                        runtime->hw.formats = mout->analog_formats;
                        hinfo->maxbps = mout->analog_maxbps;
                }
                if (!mout->spdif_rates) {
                        snd_hda_query_supported_pcm(codec, mout->dig_out_nid,
                                                    &mout->spdif_rates,
                                                    &mout->spdif_formats,
                                                    &mout->spdif_maxbps);
                }
                mutex_lock(&codec->spdif_mutex);
                if (mout->share_spdif) {
                        if ((runtime->hw.rates & mout->spdif_rates) &&
                            (runtime->hw.formats & mout->spdif_formats)) {
                                runtime->hw.rates &= mout->spdif_rates;
                                runtime->hw.formats &= mout->spdif_formats;
                                if (mout->spdif_maxbps < hinfo->maxbps)
                                        hinfo->maxbps = mout->spdif_maxbps;
                        } else {
                                mout->share_spdif = 0;
                                /* FIXME: need notify? */
                        }
                }
                mutex_unlock(&codec->spdif_mutex);
        }
        return snd_pcm_hw_constraint_step(substream->runtime, 0,
                                          SNDRV_PCM_HW_PARAM_CHANNELS, 2);
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_analog_open);

/**
 * snd_hda_multi_out_analog_prepare - Preapre the analog outputs.
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 * @stream_tag: stream tag to assign
 * @format: format id to assign
 * @substream: PCM substream to assign
 *
 * Set up the i/o for analog out.
 * When the digital out is available, copy the front out to digital out, too.
 */
int snd_hda_multi_out_analog_prepare(struct hda_codec *codec,
                                     struct hda_multi_out *mout,
                                     unsigned int stream_tag,
                                     unsigned int format,
                                     struct snd_pcm_substream *substream)
{
        const hda_nid_t *nids = mout->dac_nids;
        int chs = substream->runtime->channels;
        struct hda_spdif_out *spdif;
        int i;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_hda_spdif_out_of_nid(codec, mout->dig_out_nid);
        if (mout->dig_out_nid && mout->share_spdif &&
            mout->dig_out_used != HDA_DIG_EXCLUSIVE) {
                if (chs == 2 &&
                    snd_hda_is_supported_format(codec, mout->dig_out_nid,
                                                format) &&
                    !(spdif->status & IEC958_AES0_NONAUDIO)) {
                        mout->dig_out_used = HDA_DIG_ANALOG_DUP;
                        setup_dig_out_stream(codec, mout->dig_out_nid,
                                             stream_tag, format);
                } else {
                        mout->dig_out_used = 0;
                        cleanup_dig_out_stream(codec, mout->dig_out_nid);
                }
        }
        mutex_unlock(&codec->spdif_mutex);

        /* front */
        snd_hda_codec_setup_stream(codec, nids[HDA_FRONT], stream_tag,
                                   0, format);
        if (!mout->no_share_stream &&
            mout->hp_nid && mout->hp_nid != nids[HDA_FRONT])
                /* headphone out will just decode front left/right (stereo) */
                snd_hda_codec_setup_stream(codec, mout->hp_nid, stream_tag,
                                           0, format);
        /* extra outputs copied from front */
        for (i = 0; i < ARRAY_SIZE(mout->hp_out_nid); i++)
                if (!mout->no_share_stream && mout->hp_out_nid[i])
                        snd_hda_codec_setup_stream(codec,
                                                   mout->hp_out_nid[i],
                                                   stream_tag, 0, format);

        /* surrounds */
        for (i = 1; i < mout->num_dacs; i++) {
                if (chs >= (i + 1) * 2) /* independent out */
                        snd_hda_codec_setup_stream(codec, nids[i], stream_tag,
                                                   i * 2, format);
                else if (!mout->no_share_stream) /* copy front */
                        snd_hda_codec_setup_stream(codec, nids[i], stream_tag,
                                                   0, format);
        }

        /* extra surrounds */
        for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++) {
                int ch = 0;
                if (!mout->extra_out_nid[i])
                        break;
                if (chs >= (i + 1) * 2)
                        ch = i * 2;
                else if (!mout->no_share_stream)
                        break;
                snd_hda_codec_setup_stream(codec, mout->extra_out_nid[i],
                                           stream_tag, ch, format);
        }

        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_analog_prepare);

/**
 * snd_hda_multi_out_analog_cleanup - clean up the setting for analog out
 * @codec: the HDA codec
 * @mout: hda_multi_out object
 */
int snd_hda_multi_out_analog_cleanup(struct hda_codec *codec,
                                     struct hda_multi_out *mout)
{
        const hda_nid_t *nids = mout->dac_nids;
        int i;

        for (i = 0; i < mout->num_dacs; i++)
                snd_hda_codec_cleanup_stream(codec, nids[i]);
        if (mout->hp_nid)
                snd_hda_codec_cleanup_stream(codec, mout->hp_nid);
        for (i = 0; i < ARRAY_SIZE(mout->hp_out_nid); i++)
                if (mout->hp_out_nid[i])
                        snd_hda_codec_cleanup_stream(codec,
                                                     mout->hp_out_nid[i]);
        for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++)
                if (mout->extra_out_nid[i])
                        snd_hda_codec_cleanup_stream(codec,
                                                     mout->extra_out_nid[i]);
        mutex_lock(&codec->spdif_mutex);
        if (mout->dig_out_nid && mout->dig_out_used == HDA_DIG_ANALOG_DUP) {
                cleanup_dig_out_stream(codec, mout->dig_out_nid);
                mout->dig_out_used = 0;
        }
        mutex_unlock(&codec->spdif_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_multi_out_analog_cleanup);

/**
 * snd_hda_get_default_vref - Get the default (mic) VREF pin bits
 * @codec: the HDA codec
 * @pin: referred pin NID
 *
 * Guess the suitable VREF pin bits to be set as the pin-control value.
 * Note: the function doesn't set the AC_PINCTL_IN_EN bit.
 */
unsigned int snd_hda_get_default_vref(struct hda_codec *codec, hda_nid_t pin)
{
        unsigned int pincap;
        unsigned int oldval;
        oldval = snd_hda_codec_read(codec, pin, 0,
                                    AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
        pincap = snd_hda_query_pin_caps(codec, pin);
        pincap = (pincap & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT;
        /* Exception: if the default pin setup is vref50, we give it priority */
        if ((pincap & AC_PINCAP_VREF_80) && oldval != PIN_VREF50)
                return AC_PINCTL_VREF_80;
        else if (pincap & AC_PINCAP_VREF_50)
                return AC_PINCTL_VREF_50;
        else if (pincap & AC_PINCAP_VREF_100)
                return AC_PINCTL_VREF_100;
        else if (pincap & AC_PINCAP_VREF_GRD)
                return AC_PINCTL_VREF_GRD;
        return AC_PINCTL_VREF_HIZ;
}
EXPORT_SYMBOL_GPL(snd_hda_get_default_vref);

/**
 * snd_hda_correct_pin_ctl - correct the pin ctl value for matching with the pin cap
 * @codec: the HDA codec
 * @pin: referred pin NID
 * @val: pin ctl value to audit
 */
unsigned int snd_hda_correct_pin_ctl(struct hda_codec *codec,
                                     hda_nid_t pin, unsigned int val)
{
        static unsigned int cap_lists[][2] = {
                { AC_PINCTL_VREF_100, AC_PINCAP_VREF_100 },
                { AC_PINCTL_VREF_80, AC_PINCAP_VREF_80 },
                { AC_PINCTL_VREF_50, AC_PINCAP_VREF_50 },
                { AC_PINCTL_VREF_GRD, AC_PINCAP_VREF_GRD },
        };
        unsigned int cap;

        if (!val)
                return 0;
        cap = snd_hda_query_pin_caps(codec, pin);
        if (!cap)
                return val; /* don't know what to do... */

        if (val & AC_PINCTL_OUT_EN) {
                if (!(cap & AC_PINCAP_OUT))
                        val &= ~(AC_PINCTL_OUT_EN | AC_PINCTL_HP_EN);
                else if ((val & AC_PINCTL_HP_EN) && !(cap & AC_PINCAP_HP_DRV))
                        val &= ~AC_PINCTL_HP_EN;
        }

        if (val & AC_PINCTL_IN_EN) {
                if (!(cap & AC_PINCAP_IN))
                        val &= ~(AC_PINCTL_IN_EN | AC_PINCTL_VREFEN);
                else {
                        unsigned int vcap, vref;
                        int i;
                        vcap = (cap & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT;
                        vref = val & AC_PINCTL_VREFEN;
                        for (i = 0; i < ARRAY_SIZE(cap_lists); i++) {
                                if (vref == cap_lists[i][0] &&
                                    !(vcap & cap_lists[i][1])) {
                                        if (i == ARRAY_SIZE(cap_lists) - 1)
                                                vref = AC_PINCTL_VREF_HIZ;
                                        else
                                                vref = cap_lists[i + 1][0];
                                }
                        }
                        val &= ~AC_PINCTL_VREFEN;
                        val |= vref;
                }
        }

        return val;
}
EXPORT_SYMBOL_GPL(snd_hda_correct_pin_ctl);

/**
 * _snd_hda_pin_ctl - Helper to set pin ctl value
 * @codec: the HDA codec
 * @pin: referred pin NID
 * @val: pin control value to set
 * @cached: access over codec pinctl cache or direct write
 *
 * This function is a helper to set a pin ctl value more safely.
 * It corrects the pin ctl value via snd_hda_correct_pin_ctl(), stores the
 * value in pin target array via snd_hda_codec_set_pin_target(), then
 * actually writes the value via either snd_hda_codec_update_cache() or
 * snd_hda_codec_write() depending on @cached flag.
 */
int _snd_hda_set_pin_ctl(struct hda_codec *codec, hda_nid_t pin,
                         unsigned int val, bool cached)
{
        val = snd_hda_correct_pin_ctl(codec, pin, val);
        snd_hda_codec_set_pin_target(codec, pin, val);
        if (cached)
                return snd_hda_codec_update_cache(codec, pin, 0,
                                AC_VERB_SET_PIN_WIDGET_CONTROL, val);
        else
                return snd_hda_codec_write(codec, pin, 0,
                                           AC_VERB_SET_PIN_WIDGET_CONTROL, val);
}
EXPORT_SYMBOL_GPL(_snd_hda_set_pin_ctl);

/**
 * snd_hda_add_imux_item - Add an item to input_mux
 * @codec: the HDA codec
 * @imux: imux helper object
 * @label: the name of imux item to assign
 * @index: index number of imux item to assign
 * @type_idx: pointer to store the resultant label index
 *
 * When the same label is used already in the existing items, the number
 * suffix is appended to the label.  This label index number is stored
 * to type_idx when non-NULL pointer is given.
 */
int snd_hda_add_imux_item(struct hda_codec *codec,
                          struct hda_input_mux *imux, const char *label,
                          int index, int *type_idx)
{
        int i, label_idx = 0;
        if (imux->num_items >= HDA_MAX_NUM_INPUTS) {
                codec_err(codec, "hda_codec: Too many imux items!\n");
                return -EINVAL;
        }
        for (i = 0; i < imux->num_items; i++) {
                if (!strncmp(label, imux->items[i].label, strlen(label)))
                        label_idx++;
        }
        if (type_idx)
                *type_idx = label_idx;
        if (label_idx > 0)
                snprintf(imux->items[imux->num_items].label,
                         sizeof(imux->items[imux->num_items].label),
                         "%s %d", label, label_idx);
        else
                strlcpy(imux->items[imux->num_items].label, label,
                        sizeof(imux->items[imux->num_items].label));
        imux->items[imux->num_items].index = index;
        imux->num_items++;
        return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_add_imux_item);

/**
 * snd_hda_bus_reset - Reset the bus
 * @bus: HD-audio bus
 */
void snd_hda_bus_reset(struct hda_bus *bus)
{
        struct hda_codec *codec;

        list_for_each_codec(codec, bus) {
                /* FIXME: maybe a better way needed for forced reset */
                cancel_delayed_work_sync(&codec->jackpoll_work);
#ifdef CONFIG_PM
                if (hda_codec_is_power_on(codec)) {
                        hda_call_codec_suspend(codec);
                        hda_call_codec_resume(codec);
                }
#endif
        }
}
EXPORT_SYMBOL_GPL(snd_hda_bus_reset);

/**
 * snd_print_pcm_bits - Print the supported PCM fmt bits to the string buffer
 * @pcm: PCM caps bits
 * @buf: the string buffer to write
 * @buflen: the max buffer length
 *
 * used by hda_proc.c and hda_eld.c
 */
void snd_print_pcm_bits(int pcm, char *buf, int buflen)
{
        static unsigned int bits[] = { 8, 16, 20, 24, 32 };
        int i, j;

        for (i = 0, j = 0; i < ARRAY_SIZE(bits); i++)
                if (pcm & (AC_SUPPCM_BITS_8 << i))
                        j += snprintf(buf + j, buflen - j,  " %d", bits[i]);

        buf[j] = '\0'; /* necessary when j == 0 */
}
EXPORT_SYMBOL_GPL(snd_print_pcm_bits);

MODULE_DESCRIPTION("HDA codec core");
MODULE_LICENSE("GPL");