[deliverable/linux.git] / sound / hda / hdac_device.c

/*
 * HD-audio codec core device
 */

#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/pm_runtime.h>
#include <sound/hdaudio.h>
#include "local.h"

static void setup_fg_nodes(struct hdac_device *codec);
static int get_codec_vendor_name(struct hdac_device *codec);

static void default_release(struct device *dev)
{
	snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
}

/**
 * snd_hdac_device_init - initialize the HD-audio codec base device
 * @codec: device to initialize
 * @bus: but to attach
 * @name: device name string
 * @addr: codec address
 *
 * Returns zero for success or a negative error code.
 *
 * This function increments the runtime PM counter and marks it active.
 * The caller needs to turn it off appropriately later.
 *
 * The caller needs to set the device's release op properly by itself.
 */
int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
			 const char *name, unsigned int addr)
{
	struct device *dev;
	hda_nid_t fg;
	int err;

	dev = &codec->dev;
	device_initialize(dev);
	dev->parent = bus->dev;
	dev->bus = &snd_hda_bus_type;
	dev->release = default_release;
	dev->groups = hdac_dev_attr_groups;
	dev_set_name(dev, "%s", name);
	device_enable_async_suspend(dev);

	codec->bus = bus;
	codec->addr = addr;
	codec->type = HDA_DEV_CORE;
	pm_runtime_set_active(&codec->dev);
	pm_runtime_get_noresume(&codec->dev);
	atomic_set(&codec->in_pm, 0);

	err = snd_hdac_bus_add_device(bus, codec);
	if (err < 0)
		goto error;

	/* fill parameters */
	codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
					      AC_PAR_VENDOR_ID);
	if (codec->vendor_id == -1) {
		/* read again, hopefully the access method was corrected
		 * in the last read...
		 */
		codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
						      AC_PAR_VENDOR_ID);
	}

	codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
						 AC_PAR_SUBSYSTEM_ID);
	codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
						AC_PAR_REV_ID);

	setup_fg_nodes(codec);
	if (!codec->afg && !codec->mfg) {
		dev_err(dev, "no AFG or MFG node found\n");
		err = -ENODEV;
		goto error;
	}

	fg = codec->afg ? codec->afg : codec->mfg;

	err = snd_hdac_refresh_widgets(codec);
	if (err < 0)
		goto error;

	codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
	/* reread ssid if not set by parameter */
	if (codec->subsystem_id == -1)
		snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
			      &codec->subsystem_id);

	err = get_codec_vendor_name(codec);
	if (err < 0)
		goto error;

	codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
				     codec->vendor_id & 0xffff);
	if (!codec->chip_name) {
		err = -ENOMEM;
		goto error;
	}

	return 0;

 error:
	pm_runtime_put_noidle(&codec->dev);
	put_device(&codec->dev);
	return err;
}
EXPORT_SYMBOL_GPL(snd_hdac_device_init);

/**
 * snd_hdac_device_exit - clean up the HD-audio codec base device
 * @codec: device to clean up
 */
void snd_hdac_device_exit(struct hdac_device *codec)
{
	/* pm_runtime_put_noidle(&codec->dev); */
	snd_hdac_bus_remove_device(codec->bus, codec);
	kfree(codec->vendor_name);
	kfree(codec->chip_name);
}
EXPORT_SYMBOL_GPL(snd_hdac_device_exit);

/**
 * snd_hdac_device_register - register the hd-audio codec base device
 * codec: the device to register
 */
int snd_hdac_device_register(struct hdac_device *codec)
{
	int err;

	err = device_add(&codec->dev);
	if (err < 0)
		return err;
	err = hda_widget_sysfs_init(codec);
	if (err < 0) {
		device_del(&codec->dev);
		return err;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_device_register);

/**
 * snd_hdac_device_unregister - unregister the hd-audio codec base device
 * codec: the device to unregister
 */
void snd_hdac_device_unregister(struct hdac_device *codec)
{
	if (device_is_registered(&codec->dev)) {
		hda_widget_sysfs_exit(codec);
		device_del(&codec->dev);
	}
}
EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);

/**
 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 *	HD-audio controller
 * @codec: the codec object
 * @nid: NID to encode
 * @verb: verb to encode
 * @parm: parameter to encode
 *
 * Return an encoded command verb or -1 for error.
 */
unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
			       unsigned int verb, unsigned int parm)
{
	u32 val, addr;

	addr = codec->addr;
	if ((addr & ~0xf) || (nid & ~0x7f) ||
	    (verb & ~0xfff) || (parm & ~0xffff)) {
		dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
			addr, nid, verb, parm);
		return -1;
	}

	val = addr << 28;
	val |= (u32)nid << 20;
	val |= verb << 8;
	val |= parm;
	return val;
}
EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);

/**
 * snd_hdac_exec_verb - execute an encoded verb
 * @codec: the codec object
 * @cmd: encoded verb to execute
 * @flags: optional flags, pass zero for default
 * @res: the pointer to store the result, NULL if running async
 *
 * Returns zero if successful, or a negative error code.
 *
 * This calls the exec_verb op when set in hdac_codec.  If not,
 * call the default snd_hdac_bus_exec_verb().
 */
int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
		       unsigned int flags, unsigned int *res)
{
	if (codec->exec_verb)
		return codec->exec_verb(codec, cmd, flags, res);
	return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
}
EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);


/**
 * snd_hdac_read - execute a verb
 * @codec: the codec object
 * @nid: NID to execute a verb
 * @verb: verb to execute
 * @parm: parameter for a verb
 * @res: the pointer to store the result, NULL if running async
 *
 * Returns zero if successful, or a negative error code.
 */
int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
		  unsigned int verb, unsigned int parm, unsigned int *res)
{
	unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);

	return snd_hdac_exec_verb(codec, cmd, 0, res);
}
EXPORT_SYMBOL_GPL(snd_hdac_read);

/**
 * snd_hdac_read_parm - read a codec parameter
 * @codec: the codec object
 * @nid: NID to read a parameter
 * @parm: parameter to read
 *
 * Returns -1 for error.  If you need to distinguish the error more
 * strictly, use snd_hdac_read() directly.
 */
int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm)
{
	int val;

	if (snd_hdac_read(codec, nid, AC_VERB_PARAMETERS, parm, &val))
		return -1;
	return val;
}
EXPORT_SYMBOL_GPL(snd_hdac_read_parm);

/**
 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 * @codec: the codec object
 * @nid: NID to inspect
 * @start_id: the pointer to store the starting NID
 *
 * Returns the number of subtree nodes or zero if not found.
 */
int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
			   hda_nid_t *start_id)
{
	unsigned int parm;

	parm = snd_hdac_read_parm(codec, nid, AC_PAR_NODE_COUNT);
	if (parm == -1) {
		*start_id = 0;
		return 0;
	}
	*start_id = (parm >> 16) & 0x7fff;
	return (int)(parm & 0x7fff);
}
EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);

/*
 * look for an AFG and MFG nodes
 */
static void setup_fg_nodes(struct hdac_device *codec)
{
	int i, total_nodes, function_id;
	hda_nid_t nid;

	total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
	for (i = 0; i < total_nodes; i++, nid++) {
		function_id = snd_hdac_read_parm(codec, nid,
						 AC_PAR_FUNCTION_TYPE);
		switch (function_id & 0xff) {
		case AC_GRP_AUDIO_FUNCTION:
			codec->afg = nid;
			codec->afg_function_id = function_id & 0xff;
			codec->afg_unsol = (function_id >> 8) & 1;
			break;
		case AC_GRP_MODEM_FUNCTION:
			codec->mfg = nid;
			codec->mfg_function_id = function_id & 0xff;
			codec->mfg_unsol = (function_id >> 8) & 1;
			break;
		default:
			break;
		}
	}
}

/**
 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 * @codec: the codec object
 */
int snd_hdac_refresh_widgets(struct hdac_device *codec)
{
	hda_nid_t start_nid;
	int nums;

	nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
	if (!start_nid || nums <= 0 || nums >= 0xff) {
		dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
			codec->afg);
		return -EINVAL;
	}

	codec->num_nodes = nums;
	codec->start_nid = start_nid;
	codec->end_nid = start_nid + nums;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);

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

	if (!(wcaps & AC_WCAP_CONN_LIST) &&
	    get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
		return 0;

	parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
	if (parm == -1)
		parm = 0;
	return parm;
}

/**
 * snd_hdac_get_connections - get a widget connection list
 * @codec: the codec object
 * @nid: NID
 * @conn_list: the array to store the results, can be NULL
 * @max_conns: the max size of the given array
 *
 * Returns the number of connected widgets, zero for no connection, or a
 * negative error code.  When the number of elements don't fit with the
 * given array size, it returns -ENOSPC.
 *
 * When @conn_list is NULL, it just checks the number of connections.
 */
int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
			     hda_nid_t *conn_list, int max_conns)
{
	unsigned int parm;
	int i, conn_len, conns, err;
	unsigned int shift, num_elems, mask;
	hda_nid_t prev_nid;
	int null_count = 0;

	parm = get_num_conns(codec, nid);
	if (!parm)
		return 0;

	if (parm & AC_CLIST_LONG) {
		/* long form */
		shift = 16;
		num_elems = 2;
	} else {
		/* short form */
		shift = 8;
		num_elems = 4;
	}
	conn_len = parm & AC_CLIST_LENGTH;
	mask = (1 << (shift-1)) - 1;

	if (!conn_len)
		return 0; /* no connection */

	if (conn_len == 1) {
		/* single connection */
		err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
				    &parm);
		if (err < 0)
			return err;
		if (conn_list)
			conn_list[0] = parm & mask;
		return 1;
	}

	/* multi connection */
	conns = 0;
	prev_nid = 0;
	for (i = 0; i < conn_len; i++) {
		int range_val;
		hda_nid_t val, n;

		if (i % num_elems == 0) {
			err = snd_hdac_read(codec, nid,
					    AC_VERB_GET_CONNECT_LIST, i,
					    &parm);
			if (err < 0)
				return -EIO;
		}
		range_val = !!(parm & (1 << (shift-1))); /* ranges */
		val = parm & mask;
		if (val == 0 && null_count++) {  /* no second chance */
			dev_dbg(&codec->dev,
				"invalid CONNECT_LIST verb %x[%i]:%x\n",
				nid, i, parm);
			return 0;
		}
		parm >>= shift;
		if (range_val) {
			/* ranges between the previous and this one */
			if (!prev_nid || prev_nid >= val) {
				dev_warn(&codec->dev,
					 "invalid dep_range_val %x:%x\n",
					 prev_nid, val);
				continue;
			}
			for (n = prev_nid + 1; n <= val; n++) {
				if (conn_list) {
					if (conns >= max_conns)
						return -ENOSPC;
					conn_list[conns] = n;
				}
				conns++;
			}
		} else {
			if (conn_list) {
				if (conns >= max_conns)
					return -ENOSPC;
				conn_list[conns] = val;
			}
			conns++;
		}
		prev_nid = val;
	}
	return conns;
}
EXPORT_SYMBOL_GPL(snd_hdac_get_connections);

#ifdef CONFIG_PM
/**
 * snd_hdac_power_up - increment the runtime pm counter
 * @codec: the codec object
 */
void snd_hdac_power_up(struct hdac_device *codec)
{
	struct device *dev = &codec->dev;

	if (atomic_read(&codec->in_pm))
		return;
	pm_runtime_get_sync(dev);
}
EXPORT_SYMBOL_GPL(snd_hdac_power_up);

/**
 * snd_hdac_power_up - decrement the runtime pm counter
 * @codec: the codec object
 */
void snd_hdac_power_down(struct hdac_device *codec)
{
	struct device *dev = &codec->dev;

	if (atomic_read(&codec->in_pm))
		return;
	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);
}
EXPORT_SYMBOL_GPL(snd_hdac_power_down);
#endif

/* codec vendor labels */
struct hda_vendor_id {
	unsigned int id;
	const char *name;
};

static struct hda_vendor_id hda_vendor_ids[] = {
	{ 0x1002, "ATI" },
	{ 0x1013, "Cirrus Logic" },
	{ 0x1057, "Motorola" },
	{ 0x1095, "Silicon Image" },
	{ 0x10de, "Nvidia" },
	{ 0x10ec, "Realtek" },
	{ 0x1102, "Creative" },
	{ 0x1106, "VIA" },
	{ 0x111d, "IDT" },
	{ 0x11c1, "LSI" },
	{ 0x11d4, "Analog Devices" },
	{ 0x13f6, "C-Media" },
	{ 0x14f1, "Conexant" },
	{ 0x17e8, "Chrontel" },
	{ 0x1854, "LG" },
	{ 0x1aec, "Wolfson Microelectronics" },
	{ 0x1af4, "QEMU" },
	{ 0x434d, "C-Media" },
	{ 0x8086, "Intel" },
	{ 0x8384, "SigmaTel" },
	{} /* terminator */
};

/* store the codec vendor name */
static int get_codec_vendor_name(struct hdac_device *codec)
{
	const struct hda_vendor_id *c;
	u16 vendor_id = codec->vendor_id >> 16;

	for (c = hda_vendor_ids; c->id; c++) {
		if (c->id == vendor_id) {
			codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
			return codec->vendor_name ? 0 : -ENOMEM;
		}
	}

	codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
	return codec->vendor_name ? 0 : -ENOMEM;
}
Commit	Line	Data
7639a06c TI	1	/*
	2	* HD-audio codec core device
	3	*/
	4
	5	#include <linux/init.h>
	6	#include <linux/device.h>
	7	#include <linux/slab.h>
	8	#include <linux/module.h>
	9	#include <linux/export.h>
	10	#include <linux/pm_runtime.h>
	11	#include <sound/hdaudio.h>
	12	#include "local.h"
	13
	14	static void setup_fg_nodes(struct hdac_device *codec);
	15	static int get_codec_vendor_name(struct hdac_device *codec);
	16
	17	static void default_release(struct device *dev)
	18	{
	19	snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
	20	}
	21
	22	/**
	23	* snd_hdac_device_init - initialize the HD-audio codec base device
	24	* @codec: device to initialize
	25	* @bus: but to attach
	26	* @name: device name string
	27	* @addr: codec address
	28	*
	29	* Returns zero for success or a negative error code.
	30	*
	31	* This function increments the runtime PM counter and marks it active.
	32	* The caller needs to turn it off appropriately later.
	33	*
	34	* The caller needs to set the device's release op properly by itself.
	35	*/
	36	int snd_hdac_device_init(struct hdac_device codec, struct hdac_bus bus,
	37	const char *name, unsigned int addr)
	38	{
	39	struct device *dev;
	40	hda_nid_t fg;
	41	int err;
	42
	43	dev = &codec->dev;
	44	device_initialize(dev);
	45	dev->parent = bus->dev;
	46	dev->bus = &snd_hda_bus_type;
	47	dev->release = default_release;
3256be65	48	dev->groups = hdac_dev_attr_groups;
7639a06c TI	49	dev_set_name(dev, "%s", name);
	50	device_enable_async_suspend(dev);
	51
	52	codec->bus = bus;
	53	codec->addr = addr;
	54	codec->type = HDA_DEV_CORE;
	55	pm_runtime_set_active(&codec->dev);
	56	pm_runtime_get_noresume(&codec->dev);
	57	atomic_set(&codec->in_pm, 0);
	58
	59	err = snd_hdac_bus_add_device(bus, codec);
	60	if (err < 0)
	61	goto error;
	62
	63	/* fill parameters */
	64	codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
	65	AC_PAR_VENDOR_ID);
	66	if (codec->vendor_id == -1) {
	67	/* read again, hopefully the access method was corrected
	68	* in the last read...
	69	*/
	70	codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
	71	AC_PAR_VENDOR_ID);
	72	}
	73
	74	codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
	75	AC_PAR_SUBSYSTEM_ID);
	76	codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
	77	AC_PAR_REV_ID);
	78
	79	setup_fg_nodes(codec);
	80	if (!codec->afg && !codec->mfg) {
	81	dev_err(dev, "no AFG or MFG node found\n");
	82	err = -ENODEV;
	83	goto error;
	84	}
	85
	86	fg = codec->afg ? codec->afg : codec->mfg;
	87
	88	err = snd_hdac_refresh_widgets(codec);
	89	if (err < 0)
	90	goto error;
	91
	92	codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
	93	/* reread ssid if not set by parameter */
	94	if (codec->subsystem_id == -1)
	95	snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
	96	&codec->subsystem_id);
	97
	98	err = get_codec_vendor_name(codec);
	99	if (err < 0)
	100	goto error;
	101
	102	codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
	103	codec->vendor_id & 0xffff);
	104	if (!codec->chip_name) {
	105	err = -ENOMEM;
	106	goto error;
	107	}
	108
	109	return 0;
	110
	111	error:
	112	pm_runtime_put_noidle(&codec->dev);
113	put_device(&codec->dev);
114	return err;
115	}
116	EXPORT_SYMBOL_GPL(snd_hdac_device_init);
117
118	/**
119	* snd_hdac_device_exit - clean up the HD-audio codec base device
120	* @codec: device to clean up
121	*/
122	void snd_hdac_device_exit(struct hdac_device *codec)
123	{
124	/* pm_runtime_put_noidle(&codec->dev); */
125	snd_hdac_bus_remove_device(codec->bus, codec);
126	kfree(codec->vendor_name);
127	kfree(codec->chip_name);
128	}
129	EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
130
3256be65 TI	131	/**
	132	* snd_hdac_device_register - register the hd-audio codec base device
	133	* codec: the device to register
	134	*/
	135	int snd_hdac_device_register(struct hdac_device *codec)
	136	{
	137	int err;
	138
	139	err = device_add(&codec->dev);
	140	if (err < 0)
	141	return err;
	142	err = hda_widget_sysfs_init(codec);
	143	if (err < 0) {
	144	device_del(&codec->dev);
	145	return err;
	146	}
	147
	148	return 0;
	149	}
	150	EXPORT_SYMBOL_GPL(snd_hdac_device_register);
	151
	152	/**
	153	* snd_hdac_device_unregister - unregister the hd-audio codec base device
	154	* codec: the device to unregister
	155	*/
	156	void snd_hdac_device_unregister(struct hdac_device *codec)
	157	{
	158	if (device_is_registered(&codec->dev)) {
	159	hda_widget_sysfs_exit(codec);
	160	device_del(&codec->dev);
	161	}
	162	}
	163	EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
	164
7639a06c TI	165	/**
	166	* snd_hdac_make_cmd - compose a 32bit command word to be sent to the
	167	* HD-audio controller
	168	* @codec: the codec object
	169	* @nid: NID to encode
	170	* @verb: verb to encode
	171	* @parm: parameter to encode
	172	*
	173	* Return an encoded command verb or -1 for error.
	174	*/
	175	unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
	176	unsigned int verb, unsigned int parm)
	177	{
	178	u32 val, addr;
	179
	180	addr = codec->addr;
	181	if ((addr & ~0xf) \|\| (nid & ~0x7f) \|\|
	182	(verb & ~0xfff) \|\| (parm & ~0xffff)) {
	183	dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
	184	addr, nid, verb, parm);
	185	return -1;
	186	}
	187
	188	val = addr << 28;
	189	val \|= (u32)nid << 20;
	190	val \|= verb << 8;
	191	val \|= parm;
	192	return val;
	193	}
	194	EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
	195
05852448 TI	196	/**
	197	* snd_hdac_exec_verb - execute an encoded verb
	198	* @codec: the codec object
	199	* @cmd: encoded verb to execute
	200	* @flags: optional flags, pass zero for default
	201	* @res: the pointer to store the result, NULL if running async
	202	*
	203	* Returns zero if successful, or a negative error code.
	204	*
	205	* This calls the exec_verb op when set in hdac_codec. If not,
	206	* call the default snd_hdac_bus_exec_verb().
	207	*/
	208	int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
	209	unsigned int flags, unsigned int *res)
	210	{
	211	if (codec->exec_verb)
	212	return codec->exec_verb(codec, cmd, flags, res);
	213	return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
	214	}
	215	EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
	216
	217
7639a06c TI	218	/**
	219	* snd_hdac_read - execute a verb
	220	* @codec: the codec object
	221	* @nid: NID to execute a verb
	222	* @verb: verb to execute
	223	* @parm: parameter for a verb
	224	* @res: the pointer to store the result, NULL if running async
	225	*
	226	* Returns zero if successful, or a negative error code.
	227	*/
	228	int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
	229	unsigned int verb, unsigned int parm, unsigned int *res)
	230	{
	231	unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
	232
05852448	233	return snd_hdac_exec_verb(codec, cmd, 0, res);
7639a06c TI	234	}
	235	EXPORT_SYMBOL_GPL(snd_hdac_read);
	236
	237	/**
	238	* snd_hdac_read_parm - read a codec parameter
	239	* @codec: the codec object
	240	* @nid: NID to read a parameter
	241	* @parm: parameter to read
	242	*
	243	* Returns -1 for error. If you need to distinguish the error more
	244	* strictly, use snd_hdac_read() directly.
	245	*/
	246	int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm)
	247	{
	248	int val;
	249
	250	if (snd_hdac_read(codec, nid, AC_VERB_PARAMETERS, parm, &val))
	251	return -1;
	252	return val;
	253	}
	254	EXPORT_SYMBOL_GPL(snd_hdac_read_parm);
	255
	256	/**
	257	* snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
	258	* @codec: the codec object
	259	* @nid: NID to inspect
	260	* @start_id: the pointer to store the starting NID
	261	*
	262	* Returns the number of subtree nodes or zero if not found.
	263	*/
	264	int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
	265	hda_nid_t *start_id)
	266	{
	267	unsigned int parm;
	268
	269	parm = snd_hdac_read_parm(codec, nid, AC_PAR_NODE_COUNT);
	270	if (parm == -1) {
	271	*start_id = 0;
	272	return 0;
	273	}
	274	*start_id = (parm >> 16) & 0x7fff;
	275	return (int)(parm & 0x7fff);
	276	}
	277	EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
	278
	279	/*
	280	* look for an AFG and MFG nodes
	281	*/
	282	static void setup_fg_nodes(struct hdac_device *codec)
	283	{
	284	int i, total_nodes, function_id;
	285	hda_nid_t nid;
	286
	287	total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
	288	for (i = 0; i < total_nodes; i++, nid++) {
	289	function_id = snd_hdac_read_parm(codec, nid,
	290	AC_PAR_FUNCTION_TYPE);
	291	switch (function_id & 0xff) {
	292	case AC_GRP_AUDIO_FUNCTION:
	293	codec->afg = nid;
	294	codec->afg_function_id = function_id & 0xff;
	295	codec->afg_unsol = (function_id >> 8) & 1;
	296	break;
	297	case AC_GRP_MODEM_FUNCTION:
298	codec->mfg = nid;
299	codec->mfg_function_id = function_id & 0xff;
300	codec->mfg_unsol = (function_id >> 8) & 1;
301	break;
302	default:
303	break;
304	}
305	}
306	}
307
308	/**
309	* snd_hdac_refresh_widgets - Reset the widget start/end nodes
310	* @codec: the codec object
311	*/
312	int snd_hdac_refresh_widgets(struct hdac_device *codec)
313	{
314	hda_nid_t start_nid;
315	int nums;
316
317	nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
318	if (!start_nid \|\| nums <= 0 \|\| nums >= 0xff) {
319	dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
320	codec->afg);
321	return -EINVAL;
322	}
323
324	codec->num_nodes = nums;
325	codec->start_nid = start_nid;
326	codec->end_nid = start_nid + nums;
327	return 0;
328	}
329	EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
330
331	/* return CONNLIST_LEN parameter of the given widget */
332	static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
333	{
334	unsigned int wcaps = get_wcaps(codec, nid);
335	unsigned int parm;
336
337	if (!(wcaps & AC_WCAP_CONN_LIST) &&
338	get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
339	return 0;
340
341	parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
342	if (parm == -1)
343	parm = 0;
344	return parm;
345	}
346
347	/**
348	* snd_hdac_get_connections - get a widget connection list
349	* @codec: the codec object
350	* @nid: NID
351	* @conn_list: the array to store the results, can be NULL
352	* @max_conns: the max size of the given array
353	*
354	* Returns the number of connected widgets, zero for no connection, or a
355	* negative error code. When the number of elements don't fit with the
356	* given array size, it returns -ENOSPC.
357	*
358	* When @conn_list is NULL, it just checks the number of connections.
359	*/
360	int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
361	hda_nid_t *conn_list, int max_conns)
362	{
363	unsigned int parm;
364	int i, conn_len, conns, err;
365	unsigned int shift, num_elems, mask;
366	hda_nid_t prev_nid;
367	int null_count = 0;
368
369	parm = get_num_conns(codec, nid);
370	if (!parm)
371	return 0;
372
373	if (parm & AC_CLIST_LONG) {
374	/* long form */
375	shift = 16;
376	num_elems = 2;
377	} else {
378	/* short form */
379	shift = 8;
380	num_elems = 4;
381	}
382	conn_len = parm & AC_CLIST_LENGTH;
383	mask = (1 << (shift-1)) - 1;
384
385	if (!conn_len)
386	return 0; /* no connection */
387
388	if (conn_len == 1) {
389	/* single connection */
390	err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
391	&parm);
392	if (err < 0)
393	return err;
394	if (conn_list)
395	conn_list[0] = parm & mask;
396	return 1;
397	}
398
399	/* multi connection */
400	conns = 0;
401	prev_nid = 0;
402	for (i = 0; i < conn_len; i++) {
403	int range_val;
404	hda_nid_t val, n;
405
406	if (i % num_elems == 0) {
407	err = snd_hdac_read(codec, nid,
408	AC_VERB_GET_CONNECT_LIST, i,
409	&parm);
410	if (err < 0)
411	return -EIO;
412	}
413	range_val = !!(parm & (1 << (shift-1))); /* ranges */
414	val = parm & mask;
415	if (val == 0 && null_count++) { /* no second chance */
416	dev_dbg(&codec->dev,
417	"invalid CONNECT_LIST verb %x[%i]:%x\n",
418	nid, i, parm);
419	return 0;
420	}
421	parm >>= shift;
422	if (range_val) {
423	/* ranges between the previous and this one */
424	if (!prev_nid \|\| prev_nid >= val) {
425	dev_warn(&codec->dev,
426	"invalid dep_range_val %x:%x\n",
427	prev_nid, val);
428	continue;
429	}
430	for (n = prev_nid + 1; n <= val; n++) {
431	if (conn_list) {
432	if (conns >= max_conns)
433	return -ENOSPC;
434	conn_list[conns] = n;
435	}
436	conns++;
437	}
438	} else {
439	if (conn_list) {
440	if (conns >= max_conns)
441	return -ENOSPC;
442	conn_list[conns] = val;
443	}
444	conns++;
445	}
446	prev_nid = val;
447	}
448	return conns;
449	}
450	EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
451
452	#ifdef CONFIG_PM
453	/**
454	* snd_hdac_power_up - increment the runtime pm counter
455	* @codec: the codec object
456	*/
457	void snd_hdac_power_up(struct hdac_device *codec)
458	{
459	struct device *dev = &codec->dev;
460
461	if (atomic_read(&codec->in_pm))
462	return;
463	pm_runtime_get_sync(dev);
464	}
465	EXPORT_SYMBOL_GPL(snd_hdac_power_up);
466
467	/**
468	* snd_hdac_power_up - decrement the runtime pm counter
469	* @codec: the codec object
470	*/
471	void snd_hdac_power_down(struct hdac_device *codec)
472	{
473	struct device *dev = &codec->dev;
474
475	if (atomic_read(&codec->in_pm))
476	return;
477	pm_runtime_mark_last_busy(dev);
478	pm_runtime_put_autosuspend(dev);
479	}
480	EXPORT_SYMBOL_GPL(snd_hdac_power_down);
481	#endif
482
483	/* codec vendor labels */
484	struct hda_vendor_id {
485	unsigned int id;
486	const char *name;
487	};
488
489	static struct hda_vendor_id hda_vendor_ids[] = {
490	{ 0x1002, "ATI" },
491	{ 0x1013, "Cirrus Logic" },
492	{ 0x1057, "Motorola" },
493	{ 0x1095, "Silicon Image" },
494	{ 0x10de, "Nvidia" },
495	{ 0x10ec, "Realtek" },
496	{ 0x1102, "Creative" },
497	{ 0x1106, "VIA" },
498	{ 0x111d, "IDT" },
499	{ 0x11c1, "LSI" },
500	{ 0x11d4, "Analog Devices" },
501	{ 0x13f6, "C-Media" },
502	{ 0x14f1, "Conexant" },
503	{ 0x17e8, "Chrontel" },
504	{ 0x1854, "LG" },
505	{ 0x1aec, "Wolfson Microelectronics" },
506	{ 0x1af4, "QEMU" },
507	{ 0x434d, "C-Media" },
508	{ 0x8086, "Intel" },
509	{ 0x8384, "SigmaTel" },
510	{} /* terminator */
511	};
512
513	/* store the codec vendor name */
514	static int get_codec_vendor_name(struct hdac_device *codec)
515	{
516	const struct hda_vendor_id *c;
517	u16 vendor_id = codec->vendor_id >> 16;
518
519	for (c = hda_vendor_ids; c->id; c++) {
520	if (c->id == vendor_id) {
521	codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
522	return codec->vendor_name ? 0 : -ENOMEM;
523	}
524	}
525
526	codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
527	return codec->vendor_name ? 0 : -ENOMEM;
528	}