[linux.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>

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_rw = 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
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
fc4f000b TI	24	static int codec_pm_lock(struct hdac_device *codec)
	25	{
	26	return snd_hdac_keep_power_up(codec);
	27	}
	28
	29	static void codec_pm_unlock(struct hdac_device *codec, int lock)
	30	{
	31	if (lock == 1)
	32	snd_hdac_power_down_pm(codec);
	33	}
4d75faa0 TI	34
	35	#define get_verb(reg) (((reg) >> 8) & 0xfff)
	36
	37	static bool hda_volatile_reg(struct device *dev, unsigned int reg)
	38	{
40ba66a7	39	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	40	unsigned int verb = get_verb(reg);
	41
	42	switch (verb) {
	43	case AC_VERB_GET_PROC_COEF:
40ba66a7	44	return !codec->cache_coef;
4d75faa0 TI	45	case AC_VERB_GET_COEF_INDEX:
	46	case AC_VERB_GET_PROC_STATE:
	47	case AC_VERB_GET_POWER_STATE:
	48	case AC_VERB_GET_PIN_SENSE:
	49	case AC_VERB_GET_HDMI_DIP_SIZE:
	50	case AC_VERB_GET_HDMI_ELDD:
	51	case AC_VERB_GET_HDMI_DIP_INDEX:
	52	case AC_VERB_GET_HDMI_DIP_DATA:
	53	case AC_VERB_GET_HDMI_DIP_XMIT:
	54	case AC_VERB_GET_HDMI_CP_CTRL:
	55	case AC_VERB_GET_HDMI_CHAN_SLOT:
	56	case AC_VERB_GET_DEVICE_SEL:
	57	case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
	58	return true;
	59	}
	60
	61	return false;
	62	}
	63
	64	static bool hda_writeable_reg(struct device *dev, unsigned int reg)
	65	{
faa75f8a	66	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0	67	unsigned int verb = get_verb(reg);
a9c2dfc8	68	const unsigned int *v;
5e56bcea TI	69	int i;
5e56bcea TI	70
a9c2dfc8	71	snd_array_for_each(&codec->vendor_verbs, i, v) {
5e56bcea TI	72	if (verb == *v)
	73	return true;
	74	}
4d75faa0	75
faa75f8a TI	76	if (codec->caps_overwriting)
	77	return true;
	78
4d75faa0 TI	79	switch (verb & 0xf00) {
	80	case AC_VERB_GET_STREAM_FORMAT:
	81	case AC_VERB_GET_AMP_GAIN_MUTE:
	82	return true;
40ba66a7 TI	83	case AC_VERB_GET_PROC_COEF:
40ba66a7 TI	84	return codec->cache_coef;
4d75faa0 TI	85	case 0xf00:
	86	break;
	87	default:
	88	return false;
	89	}
	90
	91	switch (verb) {
	92	case AC_VERB_GET_CONNECT_SEL:
	93	case AC_VERB_GET_SDI_SELECT:
4d75faa0 TI	94	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	95	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	96	case AC_VERB_GET_BEEP_CONTROL:
	97	case AC_VERB_GET_EAPD_BTLENABLE:
	98	case AC_VERB_GET_DIGI_CONVERT_1:
	99	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	100	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
4d75faa0 TI	101	case AC_VERB_GET_GPIO_MASK:
	102	case AC_VERB_GET_GPIO_DIRECTION:
	103	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	104	case AC_VERB_GET_GPIO_WAKE_MASK:
	105	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	106	case AC_VERB_GET_GPIO_STICKY_MASK:
4d75faa0 TI	107	return true;
	108	}
	109
	110	return false;
	111	}
	112
	113	static bool hda_readable_reg(struct device *dev, unsigned int reg)
	114	{
faa75f8a	115	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	116	unsigned int verb = get_verb(reg);
4d75faa0 TI	117
faa75f8a TI	118	if (codec->caps_overwriting)
	119	return true;
	120
4d75faa0 TI	121	switch (verb) {
	122	case AC_VERB_PARAMETERS:
	123	case AC_VERB_GET_CONNECT_LIST:
	124	case AC_VERB_GET_SUBSYSTEM_ID:
	125	return true;
8bc174e9 TI	126	/* below are basically writable, but disabled for reducing unnecessary
	127	* writes at sync
	128	*/
	129	case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
	130	case AC_VERB_GET_CONV: /* managed in PCM code */
	131	case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
	132	return true;
4d75faa0 TI	133	}
	134
	135	return hda_writeable_reg(dev, reg);
	136	}
	137
d313e0a8 TI	138	/*
	139	* Stereo amp pseudo register:
	140	* for making easier to handle the stereo volume control, we provide a
	141	* fake register to deal both left and right channels by a single
	142	* (pseudo) register access. A verb consisting of SET_AMP_GAIN with
	143	* both SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
	144	* for the left and the upper 8bit for the right channel.
	145	*/
	146	static bool is_stereo_amp_verb(unsigned int reg)
	147	{
	148	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
	149	return false;
	150	return (reg & (AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT)) ==
	151	(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	152	}
	153
	154	/* read a pseudo stereo amp register (16bit left+right) */
	155	static int hda_reg_read_stereo_amp(struct hdac_device *codec,
	156	unsigned int reg, unsigned int *val)
	157	{
	158	unsigned int left, right;
	159	int err;
	160
	161	reg &= ~(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	162	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_LEFT, 0, &left);
	163	if (err < 0)
	164	return err;
	165	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_RIGHT, 0, &right);
	166	if (err < 0)
	167	return err;
	168	*val = left \| (right << 8);
	169	return 0;
	170	}
	171
	172	/* write a pseudo stereo amp register (16bit left+right) */
	173	static int hda_reg_write_stereo_amp(struct hdac_device *codec,
	174	unsigned int reg, unsigned int val)
	175	{
	176	int err;
	177	unsigned int verb, left, right;
	178
	179	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	180	if (reg & AC_AMP_GET_OUTPUT)
	181	verb \|= AC_AMP_SET_OUTPUT;
	182	else
	183	verb \|= AC_AMP_SET_INPUT \| ((reg & 0xf) << 8);
	184	reg = (reg & ~0xfffff) \| verb;
	185
	186	left = val & 0xff;
	187	right = (val >> 8) & 0xff;
	188	if (left == right) {
	189	reg \|= AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT;
	190	return snd_hdac_exec_verb(codec, reg \| left, 0, NULL);
	191	}
	192
	193	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_LEFT \| left, 0, NULL);
	194	if (err < 0)
	195	return err;
	196	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_RIGHT \| right, 0, NULL);
	197	if (err < 0)
	198	return err;
	199	return 0;
	200	}
	201
40ba66a7 TI	202	/* read a pseudo coef register (16bit) */
	203	static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
	204	unsigned int *val)
	205	{
	206	unsigned int verb;
	207	int err;
	208
	209	if (!codec->cache_coef)
	210	return -EINVAL;
	211	/* LSB 8bit = coef index */
	212	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	213	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	214	if (err < 0)
	215	return err;
	216	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8);
	217	return snd_hdac_exec_verb(codec, verb, 0, val);
	218	}
	219
	220	/* write a pseudo coef register (16bit) */
	221	static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
	222	unsigned int val)
	223	{
	224	unsigned int verb;
	225	int err;
	226
	227	if (!codec->cache_coef)
	228	return -EINVAL;
	229	/* LSB 8bit = coef index */
	230	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	231	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	232	if (err < 0)
	233	return err;
	234	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8) \|
	235	(val & 0xffff);
	236	return snd_hdac_exec_verb(codec, verb, 0, NULL);
	237	}
	238
4d75faa0 TI	239	static int hda_reg_read(void context, unsigned int reg, unsigned int val)
	240	{
	241	struct hdac_device *codec = context;
40ba66a7	242	int verb = get_verb(reg);
33f81940	243	int err;
fc4f000b	244	int pm_lock = 0;
4d75faa0	245
fc4f000b TI	246	if (verb != AC_VERB_GET_POWER_STATE) {
	247	pm_lock = codec_pm_lock(codec);
	248	if (pm_lock < 0)
	249	return -EAGAIN;
	250	}
4d75faa0	251	reg \|= (codec->addr << 28);
fc4f000b TI	252	if (is_stereo_amp_verb(reg)) {
	253	err = hda_reg_read_stereo_amp(codec, reg, val);
	254	goto out;
	255	}
	256	if (verb == AC_VERB_GET_PROC_COEF) {
	257	err = hda_reg_read_coef(codec, reg, val);
	258	goto out;
	259	}
a686ec4c TI	260	if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
	261	reg &= ~AC_AMP_FAKE_MUTE;
	262
33f81940 TI	263	err = snd_hdac_exec_verb(codec, reg, 0, val);
33f81940 TI	264	if (err < 0)
fc4f000b	265	goto out;
33f81940	266	/* special handling for asymmetric reads */
40ba66a7	267	if (verb == AC_VERB_GET_POWER_STATE) {
33f81940 TI	268	if (*val & AC_PWRST_ERROR)
	269	*val = -1;
	270	else /* take only the actual state */
	271	val = (val >> 4) & 0x0f;
	272	}
fc4f000b TI	273	out:
	274	codec_pm_unlock(codec, pm_lock);
	275	return err;
4d75faa0 TI	276	}
	277
	278	static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
	279	{
	280	struct hdac_device *codec = context;
	281	unsigned int verb;
	282	int i, bytes, err;
fc4f000b	283	int pm_lock = 0;
4d75faa0	284
98a226ed TI	285	if (codec->caps_overwriting)
	286	return 0;
	287
4d75faa0 TI	288	reg &= ~0x00080000U; /* drop GET bit */
4d75faa0 TI	289	reg \|= (codec->addr << 28);
9efe2731 TI	290	verb = get_verb(reg);
9efe2731 TI	291
fc4f000b TI	292	if (verb != AC_VERB_SET_POWER_STATE) {
	293	pm_lock = codec_pm_lock(codec);
	294	if (pm_lock < 0)
	295	return codec->lazy_cache ? 0 : -EAGAIN;
	296	}
4d75faa0	297
fc4f000b TI	298	if (is_stereo_amp_verb(reg)) {
	299	err = hda_reg_write_stereo_amp(codec, reg, val);
	300	goto out;
	301	}
d313e0a8	302
fc4f000b TI	303	if (verb == AC_VERB_SET_PROC_COEF) {
	304	err = hda_reg_write_coef(codec, reg, val);
	305	goto out;
	306	}
40ba66a7	307
4d75faa0 TI	308	switch (verb & 0xf00) {
4d75faa0 TI	309	case AC_VERB_SET_AMP_GAIN_MUTE:
a686ec4c TI	310	if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
a686ec4c TI	311	val = 0;
4d75faa0 TI	312	verb = AC_VERB_SET_AMP_GAIN_MUTE;
	313	if (reg & AC_AMP_GET_LEFT)
	314	verb \|= AC_AMP_SET_LEFT >> 8;
	315	else
	316	verb \|= AC_AMP_SET_RIGHT >> 8;
	317	if (reg & AC_AMP_GET_OUTPUT) {
	318	verb \|= AC_AMP_SET_OUTPUT >> 8;
	319	} else {
	320	verb \|= AC_AMP_SET_INPUT >> 8;
	321	verb \|= reg & 0xf;
	322	}
	323	break;
	324	}
	325
	326	switch (verb) {
	327	case AC_VERB_SET_DIGI_CONVERT_1:
	328	bytes = 2;
	329	break;
	330	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
	331	bytes = 4;
	332	break;
	333	default:
	334	bytes = 1;
	335	break;
	336	}
	337
	338	for (i = 0; i < bytes; i++) {
	339	reg &= ~0xfffff;
	340	reg \|= (verb + i) << 8 \| ((val >> (8 * i)) & 0xff);
	341	err = snd_hdac_exec_verb(codec, reg, 0, NULL);
	342	if (err < 0)
fc4f000b	343	goto out;
4d75faa0 TI	344	}
4d75faa0 TI	345
fc4f000b TI	346	out:
	347	codec_pm_unlock(codec, pm_lock);
	348	return err;
4d75faa0 TI	349	}
	350
	351	static const struct regmap_config hda_regmap_cfg = {
	352	.name = "hdaudio",
	353	.reg_bits = 32,
	354	.val_bits = 32,
	355	.max_register = 0xfffffff,
	356	.writeable_reg = hda_writeable_reg,
	357	.readable_reg = hda_readable_reg,
	358	.volatile_reg = hda_volatile_reg,
	359	.cache_type = REGCACHE_RBTREE,
	360	.reg_read = hda_reg_read,
	361	.reg_write = hda_reg_write,
9d82f927	362	.use_single_rw = true,
4d75faa0 TI	363	};
4d75faa0 TI	364
78dd5e21 TI	365	/**
	366	* snd_hdac_regmap_init - Initialize regmap for HDA register accesses
	367	* @codec: the codec object
	368	*
	369	* Returns zero for success or a negative error code.
	370	*/
4d75faa0 TI	371	int snd_hdac_regmap_init(struct hdac_device *codec)
	372	{
	373	struct regmap *regmap;
	374
	375	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	376	if (IS_ERR(regmap))
	377	return PTR_ERR(regmap);
	378	codec->regmap = regmap;
5e56bcea	379	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
4d75faa0 TI	380	return 0;
	381	}
	382	EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
	383
78dd5e21 TI	384	/**
	385	* snd_hdac_regmap_init - Release the regmap from HDA codec
	386	* @codec: the codec object
	387	*/
4d75faa0 TI	388	void snd_hdac_regmap_exit(struct hdac_device *codec)
	389	{
	390	if (codec->regmap) {
	391	regmap_exit(codec->regmap);
	392	codec->regmap = NULL;
5e56bcea	393	snd_array_free(&codec->vendor_verbs);
4d75faa0 TI	394	}
	395	}
	396	EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
	397
5e56bcea TI	398	/**
	399	* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
	400	* @codec: the codec object
	401	* @verb: verb to allow accessing via regmap
	402	*
	403	* Returns zero for success or a negative error code.
	404	*/
	405	int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
	406	unsigned int verb)
	407	{
	408	unsigned int *p = snd_array_new(&codec->vendor_verbs);
	409
	410	if (!p)
	411	return -ENOMEM;
d6eb9e3e	412	p = verb \| 0x800; / set GET bit */
5e56bcea TI	413	return 0;
	414	}
	415	EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
	416
4d75faa0 TI	417	/*
	418	* helper functions
	419	*/
	420
	421	/* write a pseudo-register value (w/o power sequence) */
	422	static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
	423	unsigned int val)
	424	{
	425	if (!codec->regmap)
	426	return hda_reg_write(codec, reg, val);
	427	else
	428	return regmap_write(codec->regmap, reg, val);
	429	}
	430
	431	/**
	432	* snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
	433	* @codec: the codec object
	434	* @reg: pseudo register
	435	* @val: value to write
	436	*
	437	* Returns zero if successful or a negative error code.
	438	*/
	439	int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
	440	unsigned int val)
	441	{
	442	int err;
	443
	444	err = reg_raw_write(codec, reg, val);
	445	if (err == -EAGAIN) {
fbce23a0	446	err = snd_hdac_power_up_pm(codec);
8198868f	447	if (err >= 0)
fbce23a0	448	err = reg_raw_write(codec, reg, val);
664c7155	449	snd_hdac_power_down_pm(codec);
4d75faa0 TI	450	}
	451	return err;
	452	}
	453	EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
	454
	455	static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
3194ed49	456	unsigned int *val, bool uncached)
4d75faa0	457	{
3194ed49	458	if (uncached \|\| !codec->regmap)
4d75faa0 TI	459	return hda_reg_read(codec, reg, val);
	460	else
	461	return regmap_read(codec->regmap, reg, val);
	462	}
	463
3194ed49 TI	464	static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
	465	unsigned int reg, unsigned int *val,
	466	bool uncached)
	467	{
	468	int err;
	469
	470	err = reg_raw_read(codec, reg, val, uncached);
	471	if (err == -EAGAIN) {
	472	err = snd_hdac_power_up_pm(codec);
8198868f	473	if (err >= 0)
3194ed49 TI	474	err = reg_raw_read(codec, reg, val, uncached);
	475	snd_hdac_power_down_pm(codec);
	476	}
	477	return err;
	478	}
	479
4d75faa0 TI	480	/**
	481	* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
	482	* @codec: the codec object
	483	* @reg: pseudo register
	484	* @val: pointer to store the read value
	485	*
	486	* Returns zero if successful or a negative error code.
	487	*/
	488	int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
	489	unsigned int *val)
	490	{
3194ed49	491	return __snd_hdac_regmap_read_raw(codec, reg, val, false);
4d75faa0 TI	492	}
	493	EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
	494
3194ed49 TI	495	/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
	496	* cache but always via hda verbs.
	497	*/
	498	int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
	499	unsigned int reg, unsigned int *val)
	500	{
	501	return __snd_hdac_regmap_read_raw(codec, reg, val, true);
	502	}
	503
4d75faa0 TI	504	/**
	505	* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
	506	* @codec: the codec object
	507	* @reg: pseudo register
	508	* @mask: bit mask to udpate
	509	* @val: value to update
	510	*
	511	* Returns zero if successful or a negative error code.
	512	*/
	513	int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
	514	unsigned int mask, unsigned int val)
	515	{
	516	unsigned int orig;
	517	int err;
	518
	519	val &= mask;
	520	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
	521	if (err < 0)
	522	return err;
	523	val \|= orig & ~mask;
	524	if (val == orig)
	525	return 0;
	526	err = snd_hdac_regmap_write_raw(codec, reg, val);
	527	if (err < 0)
	528	return err;
	529	return 1;
	530	}
	531	EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);