[linux-2.6-block.git] / sound / hda / hdac_regmap.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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>

static int codec_pm_lock(struct hdac_device *codec)
{
	return snd_hdac_keep_power_up(codec);
}

static void codec_pm_unlock(struct hdac_device *codec, int lock)
{
	if (lock == 1)
		snd_hdac_power_down_pm(codec);
}

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

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

	switch (verb) {
	case AC_VERB_GET_PROC_COEF:
		return !codec->cache_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);
	const unsigned int *v;
	int i;

	snd_array_for_each(&codec->vendor_verbs, i, v) {
		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 AC_VERB_GET_PROC_COEF:
		return codec->cache_coef;
	case 0xf00:
		break;
	default:
		return false;
	}

	switch (verb) {
	case AC_VERB_GET_CONNECT_SEL:
	case AC_VERB_GET_SDI_SELECT:
	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_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:
		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;
	/* below are basically writable, but disabled for reducing unnecessary
	 * writes at sync
	 */
	case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
	case AC_VERB_GET_CONV: /* managed in PCM code */
	case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
		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;
}

/* read a pseudo coef register (16bit) */
static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
			     unsigned int *val)
{
	unsigned int verb;
	int err;

	if (!codec->cache_coef)
		return -EINVAL;
	/* LSB 8bit = coef index */
	verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	if (err < 0)
		return err;
	verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8);
	return snd_hdac_exec_verb(codec, verb, 0, val);
}

/* write a pseudo coef register (16bit) */
static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
			      unsigned int val)
{
	unsigned int verb;
	int err;

	if (!codec->cache_coef)
		return -EINVAL;
	/* LSB 8bit = coef index */
	verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	if (err < 0)
		return err;
	verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) |
		(val & 0xffff);
	return snd_hdac_exec_verb(codec, verb, 0, NULL);
}

static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
{
	struct hdac_device *codec = context;
	int verb = get_verb(reg);
	int err;
	int pm_lock = 0;

	if (verb != AC_VERB_GET_POWER_STATE) {
		pm_lock = codec_pm_lock(codec);
		if (pm_lock < 0)
			return -EAGAIN;
	}
	reg |= (codec->addr << 28);
	if (is_stereo_amp_verb(reg)) {
		err = hda_reg_read_stereo_amp(codec, reg, val);
		goto out;
	}
	if (verb == AC_VERB_GET_PROC_COEF) {
		err = hda_reg_read_coef(codec, reg, val);
		goto out;
	}
	if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
		reg &= ~AC_AMP_FAKE_MUTE;

	err = snd_hdac_exec_verb(codec, reg, 0, val);
	if (err < 0)
		goto out;
	/* special handling for asymmetric reads */
	if (verb == AC_VERB_GET_POWER_STATE) {
		if (*val & AC_PWRST_ERROR)
			*val = -1;
		else /* take only the actual state */
			*val = (*val >> 4) & 0x0f;
	}
 out:
	codec_pm_unlock(codec, pm_lock);
	return err;
}

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;
	int pm_lock = 0;

	if (codec->caps_overwriting)
		return 0;

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

	if (verb != AC_VERB_SET_POWER_STATE) {
		pm_lock = codec_pm_lock(codec);
		if (pm_lock < 0)
			return codec->lazy_cache ? 0 : -EAGAIN;
	}

	if (is_stereo_amp_verb(reg)) {
		err = hda_reg_write_stereo_amp(codec, reg, val);
		goto out;
	}

	if (verb == AC_VERB_SET_PROC_COEF) {
		err = hda_reg_write_coef(codec, reg, val);
		goto out;
	}

	switch (verb & 0xf00) {
	case AC_VERB_SET_AMP_GAIN_MUTE:
		if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
			val = 0;
		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)
			goto out;
	}

 out:
	codec_pm_unlock(codec, pm_lock);
	return err;
}

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,
	.use_single_read = true,
	.use_single_write = true,
};

/**
 * snd_hdac_regmap_init - Initialize regmap for HDA register accesses
 * @codec: the codec object
 *
 * Returns zero for success or a negative error code.
 */
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);

/**
 * snd_hdac_regmap_init - Release the regmap from HDA codec
 * @codec: the codec object
 */
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 | 0x800; /* set GET bit */
	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) {
		err = snd_hdac_power_up_pm(codec);
		if (err >= 0)
			err = reg_raw_write(codec, reg, val);
		snd_hdac_power_down_pm(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, bool uncached)
{
	if (uncached || !codec->regmap)
		return hda_reg_read(codec, reg, val);
	else
		return regmap_read(codec->regmap, reg, val);
}

static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
				      unsigned int reg, unsigned int *val,
				      bool uncached)
{
	int err;

	err = reg_raw_read(codec, reg, val, uncached);
	if (err == -EAGAIN) {
		err = snd_hdac_power_up_pm(codec);
		if (err >= 0)
			err = reg_raw_read(codec, reg, val, uncached);
		snd_hdac_power_down_pm(codec);
	}
	return err;
}

/**
 * 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)
{
	return __snd_hdac_regmap_read_raw(codec, reg, val, false);
}
EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);

/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
 * cache but always via hda verbs.
 */
int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
				      unsigned int reg, unsigned int *val)
{
	return __snd_hdac_regmap_read_raw(codec, reg, val, true);
}

/**
 * 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
457c8996	1	// SPDX-License-Identifier: GPL-2.0-only
4d75faa0 TI	2	/*
	3	* Regmap support for HD-audio verbs
	4	*
	5	* A virtual register is translated to one or more hda verbs for write,
	6	* vice versa for read.
	7	*
	8	* A few limitations:
	9	* - Provided for not all verbs but only subset standard non-volatile verbs.
	10	* - For reading, only AC_VERB_GET_* variants can be used.
	11	* - For writing, mapped to the corresponding AC_VERB_SET_* variants,
	12	* so can't handle asymmetric verbs for read and write
	13	*/
	14
	15	#include <linux/slab.h>
	16	#include <linux/device.h>
	17	#include <linux/regmap.h>
	18	#include <linux/export.h>
	19	#include <linux/pm.h>
	20	#include <linux/pm_runtime.h>
	21	#include <sound/core.h>
	22	#include <sound/hdaudio.h>
	23	#include <sound/hda_regmap.h>
	24
fc4f000b TI	25	static int codec_pm_lock(struct hdac_device *codec)
	26	{
	27	return snd_hdac_keep_power_up(codec);
	28	}
	29
	30	static void codec_pm_unlock(struct hdac_device *codec, int lock)
	31	{
	32	if (lock == 1)
	33	snd_hdac_power_down_pm(codec);
	34	}
4d75faa0 TI	35
	36	#define get_verb(reg) (((reg) >> 8) & 0xfff)
	37
	38	static bool hda_volatile_reg(struct device *dev, unsigned int reg)
	39	{
40ba66a7	40	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	41	unsigned int verb = get_verb(reg);
	42
	43	switch (verb) {
	44	case AC_VERB_GET_PROC_COEF:
40ba66a7	45	return !codec->cache_coef;
4d75faa0 TI	46	case AC_VERB_GET_COEF_INDEX:
	47	case AC_VERB_GET_PROC_STATE:
	48	case AC_VERB_GET_POWER_STATE:
	49	case AC_VERB_GET_PIN_SENSE:
	50	case AC_VERB_GET_HDMI_DIP_SIZE:
	51	case AC_VERB_GET_HDMI_ELDD:
	52	case AC_VERB_GET_HDMI_DIP_INDEX:
	53	case AC_VERB_GET_HDMI_DIP_DATA:
	54	case AC_VERB_GET_HDMI_DIP_XMIT:
	55	case AC_VERB_GET_HDMI_CP_CTRL:
	56	case AC_VERB_GET_HDMI_CHAN_SLOT:
	57	case AC_VERB_GET_DEVICE_SEL:
	58	case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
	59	return true;
	60	}
	61
	62	return false;
	63	}
	64
	65	static bool hda_writeable_reg(struct device *dev, unsigned int reg)
	66	{
faa75f8a	67	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0	68	unsigned int verb = get_verb(reg);
a9c2dfc8	69	const unsigned int *v;
5e56bcea TI	70	int i;
5e56bcea TI	71
a9c2dfc8	72	snd_array_for_each(&codec->vendor_verbs, i, v) {
5e56bcea TI	73	if (verb == *v)
	74	return true;
	75	}
4d75faa0	76
faa75f8a TI	77	if (codec->caps_overwriting)
	78	return true;
	79
4d75faa0 TI	80	switch (verb & 0xf00) {
	81	case AC_VERB_GET_STREAM_FORMAT:
	82	case AC_VERB_GET_AMP_GAIN_MUTE:
	83	return true;
40ba66a7 TI	84	case AC_VERB_GET_PROC_COEF:
40ba66a7 TI	85	return codec->cache_coef;
4d75faa0 TI	86	case 0xf00:
	87	break;
	88	default:
	89	return false;
	90	}
	91
	92	switch (verb) {
	93	case AC_VERB_GET_CONNECT_SEL:
	94	case AC_VERB_GET_SDI_SELECT:
4d75faa0 TI	95	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	96	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	97	case AC_VERB_GET_BEEP_CONTROL:
	98	case AC_VERB_GET_EAPD_BTLENABLE:
	99	case AC_VERB_GET_DIGI_CONVERT_1:
	100	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	101	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
4d75faa0 TI	102	case AC_VERB_GET_GPIO_MASK:
	103	case AC_VERB_GET_GPIO_DIRECTION:
	104	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	105	case AC_VERB_GET_GPIO_WAKE_MASK:
	106	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	107	case AC_VERB_GET_GPIO_STICKY_MASK:
4d75faa0 TI	108	return true;
	109	}
	110
	111	return false;
	112	}
	113
	114	static bool hda_readable_reg(struct device *dev, unsigned int reg)
	115	{
faa75f8a	116	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	117	unsigned int verb = get_verb(reg);
4d75faa0 TI	118
faa75f8a TI	119	if (codec->caps_overwriting)
	120	return true;
	121
4d75faa0 TI	122	switch (verb) {
	123	case AC_VERB_PARAMETERS:
	124	case AC_VERB_GET_CONNECT_LIST:
	125	case AC_VERB_GET_SUBSYSTEM_ID:
	126	return true;
8bc174e9 TI	127	/* below are basically writable, but disabled for reducing unnecessary
	128	* writes at sync
	129	*/
	130	case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
	131	case AC_VERB_GET_CONV: /* managed in PCM code */
	132	case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
	133	return true;
4d75faa0 TI	134	}
	135
	136	return hda_writeable_reg(dev, reg);
	137	}
	138
d313e0a8 TI	139	/*
	140	* Stereo amp pseudo register:
	141	* for making easier to handle the stereo volume control, we provide a
	142	* fake register to deal both left and right channels by a single
	143	* (pseudo) register access. A verb consisting of SET_AMP_GAIN with
	144	* both SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
	145	* for the left and the upper 8bit for the right channel.
	146	*/
	147	static bool is_stereo_amp_verb(unsigned int reg)
	148	{
	149	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
	150	return false;
	151	return (reg & (AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT)) ==
	152	(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	153	}
	154
	155	/* read a pseudo stereo amp register (16bit left+right) */
	156	static int hda_reg_read_stereo_amp(struct hdac_device *codec,
	157	unsigned int reg, unsigned int *val)
	158	{
	159	unsigned int left, right;
	160	int err;
	161
	162	reg &= ~(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	163	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_LEFT, 0, &left);
	164	if (err < 0)
	165	return err;
	166	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_RIGHT, 0, &right);
	167	if (err < 0)
	168	return err;
	169	*val = left \| (right << 8);
	170	return 0;
	171	}
	172
	173	/* write a pseudo stereo amp register (16bit left+right) */
	174	static int hda_reg_write_stereo_amp(struct hdac_device *codec,
	175	unsigned int reg, unsigned int val)
	176	{
	177	int err;
	178	unsigned int verb, left, right;
	179
	180	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	181	if (reg & AC_AMP_GET_OUTPUT)
	182	verb \|= AC_AMP_SET_OUTPUT;
	183	else
	184	verb \|= AC_AMP_SET_INPUT \| ((reg & 0xf) << 8);
	185	reg = (reg & ~0xfffff) \| verb;
	186
	187	left = val & 0xff;
	188	right = (val >> 8) & 0xff;
	189	if (left == right) {
	190	reg \|= AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT;
	191	return snd_hdac_exec_verb(codec, reg \| left, 0, NULL);
	192	}
	193
	194	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_LEFT \| left, 0, NULL);
	195	if (err < 0)
	196	return err;
	197	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_RIGHT \| right, 0, NULL);
	198	if (err < 0)
	199	return err;
	200	return 0;
	201	}
	202
40ba66a7 TI	203	/* read a pseudo coef register (16bit) */
	204	static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
	205	unsigned int *val)
	206	{
	207	unsigned int verb;
	208	int err;
	209
	210	if (!codec->cache_coef)
	211	return -EINVAL;
	212	/* LSB 8bit = coef index */
	213	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	214	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	215	if (err < 0)
	216	return err;
	217	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8);
	218	return snd_hdac_exec_verb(codec, verb, 0, val);
	219	}
	220
	221	/* write a pseudo coef register (16bit) */
	222	static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
	223	unsigned int val)
	224	{
	225	unsigned int verb;
	226	int err;
	227
	228	if (!codec->cache_coef)
	229	return -EINVAL;
	230	/* LSB 8bit = coef index */
	231	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	232	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	233	if (err < 0)
	234	return err;
	235	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8) \|
	236	(val & 0xffff);
	237	return snd_hdac_exec_verb(codec, verb, 0, NULL);
	238	}
	239
4d75faa0 TI	240	static int hda_reg_read(void context, unsigned int reg, unsigned int val)
	241	{
	242	struct hdac_device *codec = context;
40ba66a7	243	int verb = get_verb(reg);
33f81940	244	int err;
fc4f000b	245	int pm_lock = 0;
4d75faa0	246
fc4f000b TI	247	if (verb != AC_VERB_GET_POWER_STATE) {
	248	pm_lock = codec_pm_lock(codec);
	249	if (pm_lock < 0)
	250	return -EAGAIN;
	251	}
4d75faa0	252	reg \|= (codec->addr << 28);
fc4f000b TI	253	if (is_stereo_amp_verb(reg)) {
	254	err = hda_reg_read_stereo_amp(codec, reg, val);
	255	goto out;
	256	}
	257	if (verb == AC_VERB_GET_PROC_COEF) {
	258	err = hda_reg_read_coef(codec, reg, val);
	259	goto out;
	260	}
a686ec4c TI	261	if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
	262	reg &= ~AC_AMP_FAKE_MUTE;
	263
33f81940 TI	264	err = snd_hdac_exec_verb(codec, reg, 0, val);
33f81940 TI	265	if (err < 0)
fc4f000b	266	goto out;
33f81940	267	/* special handling for asymmetric reads */
40ba66a7	268	if (verb == AC_VERB_GET_POWER_STATE) {
33f81940 TI	269	if (*val & AC_PWRST_ERROR)
	270	*val = -1;
	271	else /* take only the actual state */
	272	val = (val >> 4) & 0x0f;
	273	}
fc4f000b TI	274	out:
	275	codec_pm_unlock(codec, pm_lock);
	276	return err;
4d75faa0 TI	277	}
	278
	279	static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
	280	{
	281	struct hdac_device *codec = context;
	282	unsigned int verb;
	283	int i, bytes, err;
fc4f000b	284	int pm_lock = 0;
4d75faa0	285
98a226ed TI	286	if (codec->caps_overwriting)
	287	return 0;
	288
4d75faa0 TI	289	reg &= ~0x00080000U; /* drop GET bit */
4d75faa0 TI	290	reg \|= (codec->addr << 28);
9efe2731 TI	291	verb = get_verb(reg);
9efe2731 TI	292
fc4f000b TI	293	if (verb != AC_VERB_SET_POWER_STATE) {
	294	pm_lock = codec_pm_lock(codec);
	295	if (pm_lock < 0)
	296	return codec->lazy_cache ? 0 : -EAGAIN;
	297	}
4d75faa0	298
fc4f000b TI	299	if (is_stereo_amp_verb(reg)) {
	300	err = hda_reg_write_stereo_amp(codec, reg, val);
	301	goto out;
	302	}
d313e0a8	303
fc4f000b TI	304	if (verb == AC_VERB_SET_PROC_COEF) {
	305	err = hda_reg_write_coef(codec, reg, val);
	306	goto out;
	307	}
40ba66a7	308
4d75faa0 TI	309	switch (verb & 0xf00) {
4d75faa0 TI	310	case AC_VERB_SET_AMP_GAIN_MUTE:
a686ec4c TI	311	if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
a686ec4c TI	312	val = 0;
4d75faa0 TI	313	verb = AC_VERB_SET_AMP_GAIN_MUTE;
	314	if (reg & AC_AMP_GET_LEFT)
	315	verb \|= AC_AMP_SET_LEFT >> 8;
	316	else
	317	verb \|= AC_AMP_SET_RIGHT >> 8;
	318	if (reg & AC_AMP_GET_OUTPUT) {
	319	verb \|= AC_AMP_SET_OUTPUT >> 8;
	320	} else {
	321	verb \|= AC_AMP_SET_INPUT >> 8;
	322	verb \|= reg & 0xf;
	323	}
	324	break;
	325	}
	326
	327	switch (verb) {
	328	case AC_VERB_SET_DIGI_CONVERT_1:
	329	bytes = 2;
	330	break;
	331	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
	332	bytes = 4;
	333	break;
	334	default:
	335	bytes = 1;
	336	break;
	337	}
	338
	339	for (i = 0; i < bytes; i++) {
	340	reg &= ~0xfffff;
	341	reg \|= (verb + i) << 8 \| ((val >> (8 * i)) & 0xff);
	342	err = snd_hdac_exec_verb(codec, reg, 0, NULL);
	343	if (err < 0)
fc4f000b	344	goto out;
4d75faa0 TI	345	}
4d75faa0 TI	346
fc4f000b TI	347	out:
	348	codec_pm_unlock(codec, pm_lock);
	349	return err;
4d75faa0 TI	350	}
	351
	352	static const struct regmap_config hda_regmap_cfg = {
	353	.name = "hdaudio",
	354	.reg_bits = 32,
	355	.val_bits = 32,
	356	.max_register = 0xfffffff,
	357	.writeable_reg = hda_writeable_reg,
	358	.readable_reg = hda_readable_reg,
	359	.volatile_reg = hda_volatile_reg,
	360	.cache_type = REGCACHE_RBTREE,
	361	.reg_read = hda_reg_read,
	362	.reg_write = hda_reg_write,
1c96a2f6 DF	363	.use_single_read = true,
1c96a2f6 DF	364	.use_single_write = true,
4d75faa0 TI	365	};
4d75faa0 TI	366
78dd5e21 TI	367	/**
	368	* snd_hdac_regmap_init - Initialize regmap for HDA register accesses
	369	* @codec: the codec object
	370	*
	371	* Returns zero for success or a negative error code.
	372	*/
4d75faa0 TI	373	int snd_hdac_regmap_init(struct hdac_device *codec)
	374	{
	375	struct regmap *regmap;
	376
	377	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	378	if (IS_ERR(regmap))
	379	return PTR_ERR(regmap);
	380	codec->regmap = regmap;
5e56bcea	381	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
4d75faa0 TI	382	return 0;
	383	}
	384	EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
	385
78dd5e21 TI	386	/**
	387	* snd_hdac_regmap_init - Release the regmap from HDA codec
	388	* @codec: the codec object
	389	*/
4d75faa0 TI	390	void snd_hdac_regmap_exit(struct hdac_device *codec)
	391	{
	392	if (codec->regmap) {
	393	regmap_exit(codec->regmap);
	394	codec->regmap = NULL;
5e56bcea	395	snd_array_free(&codec->vendor_verbs);
4d75faa0 TI	396	}
	397	}
	398	EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
	399
5e56bcea TI	400	/**
	401	* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
	402	* @codec: the codec object
	403	* @verb: verb to allow accessing via regmap
	404	*
	405	* Returns zero for success or a negative error code.
	406	*/
	407	int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
	408	unsigned int verb)
	409	{
	410	unsigned int *p = snd_array_new(&codec->vendor_verbs);
	411
	412	if (!p)
	413	return -ENOMEM;
d6eb9e3e	414	p = verb \| 0x800; / set GET bit */
5e56bcea TI	415	return 0;
	416	}
	417	EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
	418
4d75faa0 TI	419	/*
	420	* helper functions
	421	*/
	422
	423	/* write a pseudo-register value (w/o power sequence) */
	424	static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
	425	unsigned int val)
	426	{
	427	if (!codec->regmap)
	428	return hda_reg_write(codec, reg, val);
	429	else
	430	return regmap_write(codec->regmap, reg, val);
	431	}
	432
	433	/**
	434	* snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
	435	* @codec: the codec object
	436	* @reg: pseudo register
	437	* @val: value to write
	438	*
	439	* Returns zero if successful or a negative error code.
	440	*/
	441	int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
	442	unsigned int val)
	443	{
	444	int err;
	445
	446	err = reg_raw_write(codec, reg, val);
	447	if (err == -EAGAIN) {
fbce23a0	448	err = snd_hdac_power_up_pm(codec);
8198868f	449	if (err >= 0)
fbce23a0	450	err = reg_raw_write(codec, reg, val);
664c7155	451	snd_hdac_power_down_pm(codec);
4d75faa0 TI	452	}
	453	return err;
	454	}
	455	EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
	456
	457	static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
3194ed49	458	unsigned int *val, bool uncached)
4d75faa0	459	{
3194ed49	460	if (uncached \|\| !codec->regmap)
4d75faa0 TI	461	return hda_reg_read(codec, reg, val);
	462	else
	463	return regmap_read(codec->regmap, reg, val);
	464	}
	465
3194ed49 TI	466	static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
	467	unsigned int reg, unsigned int *val,
	468	bool uncached)
	469	{
	470	int err;
	471
	472	err = reg_raw_read(codec, reg, val, uncached);
	473	if (err == -EAGAIN) {
	474	err = snd_hdac_power_up_pm(codec);
8198868f	475	if (err >= 0)
3194ed49 TI	476	err = reg_raw_read(codec, reg, val, uncached);
	477	snd_hdac_power_down_pm(codec);
	478	}
	479	return err;
	480	}
	481
4d75faa0 TI	482	/**
	483	* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
	484	* @codec: the codec object
	485	* @reg: pseudo register
	486	* @val: pointer to store the read value
	487	*
	488	* Returns zero if successful or a negative error code.
	489	*/
	490	int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
	491	unsigned int *val)
	492	{
3194ed49	493	return __snd_hdac_regmap_read_raw(codec, reg, val, false);
4d75faa0 TI	494	}
	495	EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
	496
3194ed49 TI	497	/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
	498	* cache but always via hda verbs.
	499	*/
	500	int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
	501	unsigned int reg, unsigned int *val)
	502	{
	503	return __snd_hdac_regmap_read_raw(codec, reg, val, true);
	504	}
	505
4d75faa0 TI	506	/**
	507	* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
	508	* @codec: the codec object
	509	* @reg: pseudo register
	510	* @mask: bit mask to udpate
	511	* @val: value to update
	512	*
	513	* Returns zero if successful or a negative error code.
	514	*/
	515	int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
	516	unsigned int mask, unsigned int val)
	517	{
	518	unsigned int orig;
	519	int err;
	520
	521	val &= mask;
	522	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
	523	if (err < 0)
	524	return err;
	525	val \|= orig & ~mask;
	526	if (val == orig)
	527	return 0;
	528	err = snd_hdac_regmap_write_raw(codec, reg, val);
	529	if (err < 0)
	530	return err;
	531	return 1;
	532	}
	533	EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);