[mirror_ubuntu-artful-kernel.git] / sound / hda / hdac_regmap.c

/*
 * Regmap support for HD-audio verbs
 *
 * A virtual register is translated to one or more hda verbs for write,
 * vice versa for read.
 *
 * A few limitations:
 * - Provided for not all verbs but only subset standard non-volatile verbs.
 * - For reading, only AC_VERB_GET_* variants can be used.
 * - For writing, mapped to the *corresponding* AC_VERB_SET_* variants,
 *   so can't handle asymmetric verbs for read and write
 */

#include <linux/slab.h>
#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/export.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include <sound/hdaudio.h>
#include <sound/hda_regmap.h>

#ifdef CONFIG_PM
#define codec_is_running(codec)				\
	(atomic_read(&(codec)->in_pm) ||		\
	 !pm_runtime_suspended(&(codec)->dev))
#else
#define codec_is_running(codec)		true
#endif

#define get_verb(reg)	(((reg) >> 8) & 0xfff)

static bool hda_volatile_reg(struct device *dev, unsigned int reg)
{
	unsigned int verb = get_verb(reg);

	switch (verb) {
	case AC_VERB_GET_PROC_COEF:
	case AC_VERB_GET_COEF_INDEX:
	case AC_VERB_GET_PROC_STATE:
	case AC_VERB_GET_POWER_STATE:
	case AC_VERB_GET_PIN_SENSE:
	case AC_VERB_GET_HDMI_DIP_SIZE:
	case AC_VERB_GET_HDMI_ELDD:
	case AC_VERB_GET_HDMI_DIP_INDEX:
	case AC_VERB_GET_HDMI_DIP_DATA:
	case AC_VERB_GET_HDMI_DIP_XMIT:
	case AC_VERB_GET_HDMI_CP_CTRL:
	case AC_VERB_GET_HDMI_CHAN_SLOT:
	case AC_VERB_GET_DEVICE_SEL:
	case AC_VERB_GET_DEVICE_LIST:	/* read-only volatile */
		return true;
	}

	return false;
}

static bool hda_writeable_reg(struct device *dev, unsigned int reg)
{
	struct hdac_device *codec = dev_to_hdac_dev(dev);
	unsigned int verb = get_verb(reg);
	int i;

	for (i = 0; i < codec->vendor_verbs.used; i++) {
		unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
		if (verb == *v)
			return true;
	}

	if (codec->caps_overwriting)
		return true;

	switch (verb & 0xf00) {
	case AC_VERB_GET_STREAM_FORMAT:
	case AC_VERB_GET_AMP_GAIN_MUTE:
		return true;
	case 0xf00:
		break;
	default:
		return false;
	}

	switch (verb) {
	case AC_VERB_GET_CONNECT_SEL:
	case AC_VERB_GET_SDI_SELECT:
	case AC_VERB_GET_CONV:
	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	case AC_VERB_GET_BEEP_CONTROL:
	case AC_VERB_GET_EAPD_BTLENABLE:
	case AC_VERB_GET_DIGI_CONVERT_1:
	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
	case AC_VERB_GET_CONFIG_DEFAULT:
	case AC_VERB_GET_GPIO_MASK:
	case AC_VERB_GET_GPIO_DIRECTION:
	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	case AC_VERB_GET_GPIO_WAKE_MASK:
	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	case AC_VERB_GET_GPIO_STICKY_MASK:
	case AC_VERB_GET_CVT_CHAN_COUNT:
		return true;
	}

	return false;
}

static bool hda_readable_reg(struct device *dev, unsigned int reg)
{
	struct hdac_device *codec = dev_to_hdac_dev(dev);
	unsigned int verb = get_verb(reg);

	if (codec->caps_overwriting)
		return true;

	switch (verb) {
	case AC_VERB_PARAMETERS:
	case AC_VERB_GET_CONNECT_LIST:
	case AC_VERB_GET_SUBSYSTEM_ID:
		return true;
	}

	return hda_writeable_reg(dev, reg);
}

/*
 * Stereo amp pseudo register:
 * for making easier to handle the stereo volume control, we provide a
 * fake register to deal both left and right channels by a single
 * (pseudo) register access.  A verb consisting of SET_AMP_GAIN with
 * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
 * for the left and the upper 8bit for the right channel.
 */
static bool is_stereo_amp_verb(unsigned int reg)
{
	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
		return false;
	return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) ==
		(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
}

/* read a pseudo stereo amp register (16bit left+right) */
static int hda_reg_read_stereo_amp(struct hdac_device *codec,
				   unsigned int reg, unsigned int *val)
{
	unsigned int left, right;
	int err;

	reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
	err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left);
	if (err < 0)
		return err;
	err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right);
	if (err < 0)
		return err;
	*val = left | (right << 8);
	return 0;
}

/* write a pseudo stereo amp register (16bit left+right) */
static int hda_reg_write_stereo_amp(struct hdac_device *codec,
				    unsigned int reg, unsigned int val)
{
	int err;
	unsigned int verb, left, right;

	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	if (reg & AC_AMP_GET_OUTPUT)
		verb |= AC_AMP_SET_OUTPUT;
	else
		verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8);
	reg = (reg & ~0xfffff) | verb;

	left = val & 0xff;
	right = (val >> 8) & 0xff;
	if (left == right) {
		reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
		return snd_hdac_exec_verb(codec, reg | left, 0, NULL);
	}

	err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL);
	if (err < 0)
		return err;
	err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL);
	if (err < 0)
		return err;
	return 0;
}

static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
{
	struct hdac_device *codec = context;

	if (!codec_is_running(codec))
		return -EAGAIN;
	reg |= (codec->addr << 28);
	if (is_stereo_amp_verb(reg))
		return hda_reg_read_stereo_amp(codec, reg, val);
	return snd_hdac_exec_verb(codec, reg, 0, val);
}

static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
{
	struct hdac_device *codec = context;
	unsigned int verb;
	int i, bytes, err;

	if (!codec_is_running(codec))
		return codec->lazy_cache ? 0 : -EAGAIN;

	reg &= ~0x00080000U; /* drop GET bit */
	reg |= (codec->addr << 28);

	if (is_stereo_amp_verb(reg))
		return hda_reg_write_stereo_amp(codec, reg, val);

	verb = get_verb(reg);
	switch (verb & 0xf00) {
	case AC_VERB_SET_AMP_GAIN_MUTE:
		verb = AC_VERB_SET_AMP_GAIN_MUTE;
		if (reg & AC_AMP_GET_LEFT)
			verb |= AC_AMP_SET_LEFT >> 8;
		else
			verb |= AC_AMP_SET_RIGHT >> 8;
		if (reg & AC_AMP_GET_OUTPUT) {
			verb |= AC_AMP_SET_OUTPUT >> 8;
		} else {
			verb |= AC_AMP_SET_INPUT >> 8;
			verb |= reg & 0xf;
		}
		break;
	}

	switch (verb) {
	case AC_VERB_SET_DIGI_CONVERT_1:
		bytes = 2;
		break;
	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
		bytes = 4;
		break;
	default:
		bytes = 1;
		break;
	}

	for (i = 0; i < bytes; i++) {
		reg &= ~0xfffff;
		reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff);
		err = snd_hdac_exec_verb(codec, reg, 0, NULL);
		if (err < 0)
			return err;
	}

	return 0;
}

static const struct regmap_config hda_regmap_cfg = {
	.name = "hdaudio",
	.reg_bits = 32,
	.val_bits = 32,
	.max_register = 0xfffffff,
	.writeable_reg = hda_writeable_reg,
	.readable_reg = hda_readable_reg,
	.volatile_reg = hda_volatile_reg,
	.cache_type = REGCACHE_RBTREE,
	.reg_read = hda_reg_read,
	.reg_write = hda_reg_write,
};

int snd_hdac_regmap_init(struct hdac_device *codec)
{
	struct regmap *regmap;

	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);
	codec->regmap = regmap;
	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);

void snd_hdac_regmap_exit(struct hdac_device *codec)
{
	if (codec->regmap) {
		regmap_exit(codec->regmap);
		codec->regmap = NULL;
		snd_array_free(&codec->vendor_verbs);
	}
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);

/**
 * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
 * @codec: the codec object
 * @verb: verb to allow accessing via regmap
 *
 * Returns zero for success or a negative error code.
 */
int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
				    unsigned int verb)
{
	unsigned int *p = snd_array_new(&codec->vendor_verbs);

	if (!p)
		return -ENOMEM;
	*p = verb;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);

/*
 * helper functions
 */

/* write a pseudo-register value (w/o power sequence) */
static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
			 unsigned int val)
{
	if (!codec->regmap)
		return hda_reg_write(codec, reg, val);
	else
		return regmap_write(codec->regmap, reg, val);
}

/**
 * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
 * @codec: the codec object
 * @reg: pseudo register
 * @val: value to write
 *
 * Returns zero if successful or a negative error code.
 */
int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
			      unsigned int val)
{
	int err;

	err = reg_raw_write(codec, reg, val);
	if (err == -EAGAIN) {
		snd_hdac_power_up(codec);
		err = reg_raw_write(codec, reg, val);
		snd_hdac_power_down(codec);
	}
	return err;
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);

static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
			unsigned int *val)
{
	if (!codec->regmap)
		return hda_reg_read(codec, reg, val);
	else
		return regmap_read(codec->regmap, reg, val);
}

/**
 * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
 * @codec: the codec object
 * @reg: pseudo register
 * @val: pointer to store the read value
 *
 * Returns zero if successful or a negative error code.
 */
int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
			     unsigned int *val)
{
	int err;

	err = reg_raw_read(codec, reg, val);
	if (err == -EAGAIN) {
		snd_hdac_power_up(codec);
		err = reg_raw_read(codec, reg, val);
		snd_hdac_power_down(codec);
	}
	return err;
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);

/**
 * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
 * @codec: the codec object
 * @reg: pseudo register
 * @mask: bit mask to udpate
 * @val: value to update
 *
 * Returns zero if successful or a negative error code.
 */
int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
			       unsigned int mask, unsigned int val)
{
	unsigned int orig;
	int err;

	val &= mask;
	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
	if (err < 0)
		return err;
	val |= orig & ~mask;
	if (val == orig)
		return 0;
	err = snd_hdac_regmap_write_raw(codec, reg, val);
	if (err < 0)
		return err;
	return 1;
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);
Commit	Line	Data
4d75faa0 TI	1	/*
	2	* Regmap support for HD-audio verbs
	3	*
	4	* A virtual register is translated to one or more hda verbs for write,
	5	* vice versa for read.
	6	*
	7	* A few limitations:
	8	* - Provided for not all verbs but only subset standard non-volatile verbs.
	9	* - For reading, only AC_VERB_GET_* variants can be used.
	10	* - For writing, mapped to the corresponding AC_VERB_SET_* variants,
	11	* so can't handle asymmetric verbs for read and write
	12	*/
	13
	14	#include <linux/slab.h>
	15	#include <linux/device.h>
	16	#include <linux/regmap.h>
	17	#include <linux/export.h>
	18	#include <linux/pm.h>
	19	#include <linux/pm_runtime.h>
	20	#include <sound/core.h>
	21	#include <sound/hdaudio.h>
	22	#include <sound/hda_regmap.h>
	23
	24	#ifdef CONFIG_PM
	25	#define codec_is_running(codec) \
	26	(atomic_read(&(codec)->in_pm) \|\| \
	27	!pm_runtime_suspended(&(codec)->dev))
	28	#else
	29	#define codec_is_running(codec) true
	30	#endif
	31
	32	#define get_verb(reg) (((reg) >> 8) & 0xfff)
	33
	34	static bool hda_volatile_reg(struct device *dev, unsigned int reg)
	35	{
	36	unsigned int verb = get_verb(reg);
	37
	38	switch (verb) {
	39	case AC_VERB_GET_PROC_COEF:
	40	case AC_VERB_GET_COEF_INDEX:
	41	case AC_VERB_GET_PROC_STATE:
	42	case AC_VERB_GET_POWER_STATE:
	43	case AC_VERB_GET_PIN_SENSE:
	44	case AC_VERB_GET_HDMI_DIP_SIZE:
	45	case AC_VERB_GET_HDMI_ELDD:
	46	case AC_VERB_GET_HDMI_DIP_INDEX:
	47	case AC_VERB_GET_HDMI_DIP_DATA:
	48	case AC_VERB_GET_HDMI_DIP_XMIT:
	49	case AC_VERB_GET_HDMI_CP_CTRL:
	50	case AC_VERB_GET_HDMI_CHAN_SLOT:
	51	case AC_VERB_GET_DEVICE_SEL:
	52	case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
	53	return true;
	54	}
	55
	56	return false;
	57	}
	58
	59	static bool hda_writeable_reg(struct device *dev, unsigned int reg)
	60	{
faa75f8a	61	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0	62	unsigned int verb = get_verb(reg);
5e56bcea TI	63	int i;
	64
	65	for (i = 0; i < codec->vendor_verbs.used; i++) {
	66	unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
	67	if (verb == *v)
	68	return true;
	69	}
4d75faa0	70
faa75f8a TI	71	if (codec->caps_overwriting)
	72	return true;
	73
4d75faa0 TI	74	switch (verb & 0xf00) {
	75	case AC_VERB_GET_STREAM_FORMAT:
	76	case AC_VERB_GET_AMP_GAIN_MUTE:
	77	return true;
	78	case 0xf00:
	79	break;
	80	default:
	81	return false;
	82	}
	83
	84	switch (verb) {
	85	case AC_VERB_GET_CONNECT_SEL:
	86	case AC_VERB_GET_SDI_SELECT:
	87	case AC_VERB_GET_CONV:
	88	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	89	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	90	case AC_VERB_GET_BEEP_CONTROL:
	91	case AC_VERB_GET_EAPD_BTLENABLE:
	92	case AC_VERB_GET_DIGI_CONVERT_1:
	93	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	94	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
	95	case AC_VERB_GET_CONFIG_DEFAULT:
	96	case AC_VERB_GET_GPIO_MASK:
	97	case AC_VERB_GET_GPIO_DIRECTION:
	98	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	99	case AC_VERB_GET_GPIO_WAKE_MASK:
	100	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	101	case AC_VERB_GET_GPIO_STICKY_MASK:
	102	case AC_VERB_GET_CVT_CHAN_COUNT:
	103	return true;
	104	}
	105
	106	return false;
	107	}
	108
	109	static bool hda_readable_reg(struct device *dev, unsigned int reg)
	110	{
faa75f8a	111	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	112	unsigned int verb = get_verb(reg);
4d75faa0 TI	113
faa75f8a TI	114	if (codec->caps_overwriting)
	115	return true;
	116
4d75faa0 TI	117	switch (verb) {
	118	case AC_VERB_PARAMETERS:
	119	case AC_VERB_GET_CONNECT_LIST:
	120	case AC_VERB_GET_SUBSYSTEM_ID:
	121	return true;
	122	}
	123
	124	return hda_writeable_reg(dev, reg);
	125	}
	126
d313e0a8 TI	127	/*
	128	* Stereo amp pseudo register:
	129	* for making easier to handle the stereo volume control, we provide a
	130	* fake register to deal both left and right channels by a single
	131	* (pseudo) register access. A verb consisting of SET_AMP_GAIN with
	132	* both SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
	133	* for the left and the upper 8bit for the right channel.
	134	*/
	135	static bool is_stereo_amp_verb(unsigned int reg)
	136	{
	137	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
	138	return false;
	139	return (reg & (AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT)) ==
	140	(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	141	}
	142
	143	/* read a pseudo stereo amp register (16bit left+right) */
	144	static int hda_reg_read_stereo_amp(struct hdac_device *codec,
	145	unsigned int reg, unsigned int *val)
	146	{
	147	unsigned int left, right;
	148	int err;
	149
	150	reg &= ~(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	151	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_LEFT, 0, &left);
	152	if (err < 0)
	153	return err;
	154	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_RIGHT, 0, &right);
	155	if (err < 0)
	156	return err;
	157	*val = left \| (right << 8);
	158	return 0;
	159	}
	160
	161	/* write a pseudo stereo amp register (16bit left+right) */
	162	static int hda_reg_write_stereo_amp(struct hdac_device *codec,
	163	unsigned int reg, unsigned int val)
	164	{
	165	int err;
	166	unsigned int verb, left, right;
	167
	168	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	169	if (reg & AC_AMP_GET_OUTPUT)
	170	verb \|= AC_AMP_SET_OUTPUT;
	171	else
	172	verb \|= AC_AMP_SET_INPUT \| ((reg & 0xf) << 8);
	173	reg = (reg & ~0xfffff) \| verb;
	174
	175	left = val & 0xff;
	176	right = (val >> 8) & 0xff;
	177	if (left == right) {
	178	reg \|= AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT;
	179	return snd_hdac_exec_verb(codec, reg \| left, 0, NULL);
	180	}
	181
	182	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_LEFT \| left, 0, NULL);
	183	if (err < 0)
	184	return err;
	185	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_RIGHT \| right, 0, NULL);
	186	if (err < 0)
	187	return err;
	188	return 0;
	189	}
	190
4d75faa0 TI	191	static int hda_reg_read(void context, unsigned int reg, unsigned int val)
	192	{
	193	struct hdac_device *codec = context;
	194
	195	if (!codec_is_running(codec))
	196	return -EAGAIN;
	197	reg \|= (codec->addr << 28);
d313e0a8 TI	198	if (is_stereo_amp_verb(reg))
d313e0a8 TI	199	return hda_reg_read_stereo_amp(codec, reg, val);
4d75faa0 TI	200	return snd_hdac_exec_verb(codec, reg, 0, val);
	201	}
	202
	203	static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
	204	{
	205	struct hdac_device *codec = context;
	206	unsigned int verb;
	207	int i, bytes, err;
	208
	209	if (!codec_is_running(codec))
	210	return codec->lazy_cache ? 0 : -EAGAIN;
	211
	212	reg &= ~0x00080000U; /* drop GET bit */
	213	reg \|= (codec->addr << 28);
4d75faa0	214
d313e0a8 TI	215	if (is_stereo_amp_verb(reg))
	216	return hda_reg_write_stereo_amp(codec, reg, val);
	217
	218	verb = get_verb(reg);
4d75faa0 TI	219	switch (verb & 0xf00) {
	220	case AC_VERB_SET_AMP_GAIN_MUTE:
	221	verb = AC_VERB_SET_AMP_GAIN_MUTE;
	222	if (reg & AC_AMP_GET_LEFT)
	223	verb \|= AC_AMP_SET_LEFT >> 8;
	224	else
	225	verb \|= AC_AMP_SET_RIGHT >> 8;
	226	if (reg & AC_AMP_GET_OUTPUT) {
	227	verb \|= AC_AMP_SET_OUTPUT >> 8;
	228	} else {
	229	verb \|= AC_AMP_SET_INPUT >> 8;
	230	verb \|= reg & 0xf;
	231	}
	232	break;
	233	}
	234
	235	switch (verb) {
	236	case AC_VERB_SET_DIGI_CONVERT_1:
	237	bytes = 2;
	238	break;
	239	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
	240	bytes = 4;
	241	break;
	242	default:
	243	bytes = 1;
	244	break;
	245	}
	246
	247	for (i = 0; i < bytes; i++) {
	248	reg &= ~0xfffff;
	249	reg \|= (verb + i) << 8 \| ((val >> (8 * i)) & 0xff);
	250	err = snd_hdac_exec_verb(codec, reg, 0, NULL);
	251	if (err < 0)
	252	return err;
	253	}
	254
	255	return 0;
	256	}
	257
	258	static const struct regmap_config hda_regmap_cfg = {
	259	.name = "hdaudio",
	260	.reg_bits = 32,
	261	.val_bits = 32,
	262	.max_register = 0xfffffff,
	263	.writeable_reg = hda_writeable_reg,
	264	.readable_reg = hda_readable_reg,
	265	.volatile_reg = hda_volatile_reg,
	266	.cache_type = REGCACHE_RBTREE,
	267	.reg_read = hda_reg_read,
	268	.reg_write = hda_reg_write,
	269	};
	270
	271	int snd_hdac_regmap_init(struct hdac_device *codec)
	272	{
	273	struct regmap *regmap;
	274
	275	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	276	if (IS_ERR(regmap))
	277	return PTR_ERR(regmap);
	278	codec->regmap = regmap;
5e56bcea	279	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
4d75faa0 TI	280	return 0;
	281	}
	282	EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
	283
	284	void snd_hdac_regmap_exit(struct hdac_device *codec)
	285	{
	286	if (codec->regmap) {
	287	regmap_exit(codec->regmap);
	288	codec->regmap = NULL;
5e56bcea	289	snd_array_free(&codec->vendor_verbs);
4d75faa0 TI	290	}
	291	}
	292	EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
	293
5e56bcea TI	294	/**
	295	* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
	296	* @codec: the codec object
	297	* @verb: verb to allow accessing via regmap
	298	*
	299	* Returns zero for success or a negative error code.
	300	*/
	301	int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
	302	unsigned int verb)
	303	{
	304	unsigned int *p = snd_array_new(&codec->vendor_verbs);
	305
	306	if (!p)
	307	return -ENOMEM;
	308	*p = verb;
	309	return 0;
	310	}
	311	EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
	312
4d75faa0 TI	313	/*
	314	* helper functions
	315	*/
	316
	317	/* write a pseudo-register value (w/o power sequence) */
	318	static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
	319	unsigned int val)
	320	{
	321	if (!codec->regmap)
	322	return hda_reg_write(codec, reg, val);
	323	else
	324	return regmap_write(codec->regmap, reg, val);
	325	}
	326
	327	/**
	328	* snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
	329	* @codec: the codec object
	330	* @reg: pseudo register
	331	* @val: value to write
	332	*
	333	* Returns zero if successful or a negative error code.
	334	*/
	335	int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
	336	unsigned int val)
	337	{
	338	int err;
	339
	340	err = reg_raw_write(codec, reg, val);
	341	if (err == -EAGAIN) {
	342	snd_hdac_power_up(codec);
	343	err = reg_raw_write(codec, reg, val);
	344	snd_hdac_power_down(codec);
	345	}
	346	return err;
	347	}
	348	EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
	349
	350	static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
	351	unsigned int *val)
	352	{
	353	if (!codec->regmap)
	354	return hda_reg_read(codec, reg, val);
	355	else
	356	return regmap_read(codec->regmap, reg, val);
	357	}
	358
	359	/**
	360	* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
	361	* @codec: the codec object
	362	* @reg: pseudo register
	363	* @val: pointer to store the read value
	364	*
	365	* Returns zero if successful or a negative error code.
	366	*/
	367	int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
	368	unsigned int *val)
	369	{
	370	int err;
	371
	372	err = reg_raw_read(codec, reg, val);
	373	if (err == -EAGAIN) {
	374	snd_hdac_power_up(codec);
	375	err = reg_raw_read(codec, reg, val);
	376	snd_hdac_power_down(codec);
377	}
378	return err;
379	}
380	EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
381
382	/**
383	* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
384	* @codec: the codec object
385	* @reg: pseudo register
386	* @mask: bit mask to udpate
387	* @val: value to update
388	*
389	* Returns zero if successful or a negative error code.
390	*/
391	int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
392	unsigned int mask, unsigned int val)
393	{
394	unsigned int orig;
395	int err;
396
397	val &= mask;
398	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
399	if (err < 0)
400	return err;
401	val \|= orig & ~mask;
402	if (val == orig)
403	return 0;
404	err = snd_hdac_regmap_write_raw(codec, reg, val);
405	if (err < 0)
406	return err;
407	return 1;
408	}
409	EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);