[linux-2.6-block.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)
{
	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);
	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 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_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;
}

/* 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;

	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);
	if (verb == AC_VERB_GET_PROC_COEF)
		return hda_reg_read_coef(codec, reg, val);
	err = snd_hdac_exec_verb(codec, reg, 0, val);
	if (err < 0)
		return err;
	/* 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;
	}
	return 0;
}

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);
	if (verb == AC_VERB_SET_PROC_COEF)
		return hda_reg_write_coef(codec, reg, val);

	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	{
40ba66a7	36	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	37	unsigned int verb = get_verb(reg);
	38
	39	switch (verb) {
	40	case AC_VERB_GET_PROC_COEF:
40ba66a7	41	return !codec->cache_coef;
4d75faa0 TI	42	case AC_VERB_GET_COEF_INDEX:
	43	case AC_VERB_GET_PROC_STATE:
	44	case AC_VERB_GET_POWER_STATE:
	45	case AC_VERB_GET_PIN_SENSE:
	46	case AC_VERB_GET_HDMI_DIP_SIZE:
	47	case AC_VERB_GET_HDMI_ELDD:
	48	case AC_VERB_GET_HDMI_DIP_INDEX:
	49	case AC_VERB_GET_HDMI_DIP_DATA:
	50	case AC_VERB_GET_HDMI_DIP_XMIT:
	51	case AC_VERB_GET_HDMI_CP_CTRL:
	52	case AC_VERB_GET_HDMI_CHAN_SLOT:
	53	case AC_VERB_GET_DEVICE_SEL:
	54	case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
	55	return true;
	56	}
	57
	58	return false;
	59	}
	60
	61	static bool hda_writeable_reg(struct device *dev, unsigned int reg)
	62	{
faa75f8a	63	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0	64	unsigned int verb = get_verb(reg);
5e56bcea TI	65	int i;
	66
	67	for (i = 0; i < codec->vendor_verbs.used; i++) {
	68	unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
	69	if (verb == *v)
	70	return true;
	71	}
4d75faa0	72
faa75f8a TI	73	if (codec->caps_overwriting)
	74	return true;
	75
4d75faa0 TI	76	switch (verb & 0xf00) {
	77	case AC_VERB_GET_STREAM_FORMAT:
	78	case AC_VERB_GET_AMP_GAIN_MUTE:
	79	return true;
40ba66a7 TI	80	case AC_VERB_GET_PROC_COEF:
40ba66a7 TI	81	return codec->cache_coef;
4d75faa0 TI	82	case 0xf00:
	83	break;
	84	default:
	85	return false;
	86	}
	87
	88	switch (verb) {
	89	case AC_VERB_GET_CONNECT_SEL:
	90	case AC_VERB_GET_SDI_SELECT:
	91	case AC_VERB_GET_CONV:
	92	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	93	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	94	case AC_VERB_GET_BEEP_CONTROL:
	95	case AC_VERB_GET_EAPD_BTLENABLE:
	96	case AC_VERB_GET_DIGI_CONVERT_1:
	97	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	98	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
	99	case AC_VERB_GET_CONFIG_DEFAULT:
	100	case AC_VERB_GET_GPIO_MASK:
	101	case AC_VERB_GET_GPIO_DIRECTION:
	102	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	103	case AC_VERB_GET_GPIO_WAKE_MASK:
	104	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	105	case AC_VERB_GET_GPIO_STICKY_MASK:
	106	case AC_VERB_GET_CVT_CHAN_COUNT:
	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;
	126	}
	127
	128	return hda_writeable_reg(dev, reg);
	129	}
	130
d313e0a8 TI	131	/*
	132	* Stereo amp pseudo register:
	133	* for making easier to handle the stereo volume control, we provide a
	134	* fake register to deal both left and right channels by a single
	135	* (pseudo) register access. A verb consisting of SET_AMP_GAIN with
	136	* both SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
	137	* for the left and the upper 8bit for the right channel.
	138	*/
	139	static bool is_stereo_amp_verb(unsigned int reg)
	140	{
	141	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
	142	return false;
	143	return (reg & (AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT)) ==
	144	(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	145	}
	146
	147	/* read a pseudo stereo amp register (16bit left+right) */
	148	static int hda_reg_read_stereo_amp(struct hdac_device *codec,
	149	unsigned int reg, unsigned int *val)
	150	{
	151	unsigned int left, right;
	152	int err;
	153
	154	reg &= ~(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	155	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_LEFT, 0, &left);
	156	if (err < 0)
	157	return err;
	158	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_RIGHT, 0, &right);
	159	if (err < 0)
	160	return err;
	161	*val = left \| (right << 8);
	162	return 0;
	163	}
	164
	165	/* write a pseudo stereo amp register (16bit left+right) */
	166	static int hda_reg_write_stereo_amp(struct hdac_device *codec,
	167	unsigned int reg, unsigned int val)
	168	{
	169	int err;
	170	unsigned int verb, left, right;
	171
	172	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	173	if (reg & AC_AMP_GET_OUTPUT)
	174	verb \|= AC_AMP_SET_OUTPUT;
	175	else
	176	verb \|= AC_AMP_SET_INPUT \| ((reg & 0xf) << 8);
	177	reg = (reg & ~0xfffff) \| verb;
	178
	179	left = val & 0xff;
	180	right = (val >> 8) & 0xff;
	181	if (left == right) {
	182	reg \|= AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT;
	183	return snd_hdac_exec_verb(codec, reg \| left, 0, NULL);
	184	}
	185
	186	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_LEFT \| left, 0, NULL);
	187	if (err < 0)
	188	return err;
	189	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_RIGHT \| right, 0, NULL);
	190	if (err < 0)
	191	return err;
	192	return 0;
	193	}
	194
40ba66a7 TI	195	/* read a pseudo coef register (16bit) */
	196	static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
	197	unsigned int *val)
	198	{
	199	unsigned int verb;
	200	int err;
	201
	202	if (!codec->cache_coef)
	203	return -EINVAL;
	204	/* LSB 8bit = coef index */
	205	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	206	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	207	if (err < 0)
	208	return err;
	209	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8);
	210	return snd_hdac_exec_verb(codec, verb, 0, val);
	211	}
	212
	213	/* write a pseudo coef register (16bit) */
	214	static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
	215	unsigned int val)
	216	{
	217	unsigned int verb;
	218	int err;
	219
	220	if (!codec->cache_coef)
	221	return -EINVAL;
	222	/* LSB 8bit = coef index */
	223	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	224	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	225	if (err < 0)
	226	return err;
	227	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8) \|
	228	(val & 0xffff);
	229	return snd_hdac_exec_verb(codec, verb, 0, NULL);
	230	}
	231
4d75faa0 TI	232	static int hda_reg_read(void context, unsigned int reg, unsigned int val)
	233	{
	234	struct hdac_device *codec = context;
40ba66a7	235	int verb = get_verb(reg);
33f81940	236	int err;
4d75faa0 TI	237
	238	if (!codec_is_running(codec))
	239	return -EAGAIN;
	240	reg \|= (codec->addr << 28);
d313e0a8 TI	241	if (is_stereo_amp_verb(reg))
d313e0a8 TI	242	return hda_reg_read_stereo_amp(codec, reg, val);
40ba66a7 TI	243	if (verb == AC_VERB_GET_PROC_COEF)
40ba66a7 TI	244	return hda_reg_read_coef(codec, reg, val);
33f81940 TI	245	err = snd_hdac_exec_verb(codec, reg, 0, val);
	246	if (err < 0)
	247	return err;
	248	/* special handling for asymmetric reads */
40ba66a7	249	if (verb == AC_VERB_GET_POWER_STATE) {
33f81940 TI	250	if (*val & AC_PWRST_ERROR)
	251	*val = -1;
	252	else /* take only the actual state */
	253	val = (val >> 4) & 0x0f;
	254	}
	255	return 0;
4d75faa0 TI	256	}
	257
	258	static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
	259	{
	260	struct hdac_device *codec = context;
	261	unsigned int verb;
	262	int i, bytes, err;
	263
	264	if (!codec_is_running(codec))
	265	return codec->lazy_cache ? 0 : -EAGAIN;
	266
	267	reg &= ~0x00080000U; /* drop GET bit */
	268	reg \|= (codec->addr << 28);
4d75faa0	269
d313e0a8 TI	270	if (is_stereo_amp_verb(reg))
	271	return hda_reg_write_stereo_amp(codec, reg, val);
	272
	273	verb = get_verb(reg);
40ba66a7 TI	274	if (verb == AC_VERB_SET_PROC_COEF)
	275	return hda_reg_write_coef(codec, reg, val);
	276
4d75faa0 TI	277	switch (verb & 0xf00) {
	278	case AC_VERB_SET_AMP_GAIN_MUTE:
	279	verb = AC_VERB_SET_AMP_GAIN_MUTE;
	280	if (reg & AC_AMP_GET_LEFT)
	281	verb \|= AC_AMP_SET_LEFT >> 8;
	282	else
	283	verb \|= AC_AMP_SET_RIGHT >> 8;
	284	if (reg & AC_AMP_GET_OUTPUT) {
	285	verb \|= AC_AMP_SET_OUTPUT >> 8;
	286	} else {
	287	verb \|= AC_AMP_SET_INPUT >> 8;
	288	verb \|= reg & 0xf;
	289	}
	290	break;
	291	}
	292
	293	switch (verb) {
	294	case AC_VERB_SET_DIGI_CONVERT_1:
	295	bytes = 2;
	296	break;
	297	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
	298	bytes = 4;
	299	break;
	300	default:
	301	bytes = 1;
	302	break;
	303	}
	304
	305	for (i = 0; i < bytes; i++) {
	306	reg &= ~0xfffff;
	307	reg \|= (verb + i) << 8 \| ((val >> (8 * i)) & 0xff);
	308	err = snd_hdac_exec_verb(codec, reg, 0, NULL);
	309	if (err < 0)
	310	return err;
	311	}
	312
	313	return 0;
	314	}
	315
	316	static const struct regmap_config hda_regmap_cfg = {
	317	.name = "hdaudio",
	318	.reg_bits = 32,
	319	.val_bits = 32,
	320	.max_register = 0xfffffff,
	321	.writeable_reg = hda_writeable_reg,
	322	.readable_reg = hda_readable_reg,
	323	.volatile_reg = hda_volatile_reg,
	324	.cache_type = REGCACHE_RBTREE,
	325	.reg_read = hda_reg_read,
	326	.reg_write = hda_reg_write,
	327	};
	328
	329	int snd_hdac_regmap_init(struct hdac_device *codec)
	330	{
	331	struct regmap *regmap;
	332
	333	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	334	if (IS_ERR(regmap))
	335	return PTR_ERR(regmap);
	336	codec->regmap = regmap;
5e56bcea	337	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
4d75faa0 TI	338	return 0;
	339	}
	340	EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
	341
	342	void snd_hdac_regmap_exit(struct hdac_device *codec)
	343	{
	344	if (codec->regmap) {
	345	regmap_exit(codec->regmap);
	346	codec->regmap = NULL;
5e56bcea	347	snd_array_free(&codec->vendor_verbs);
4d75faa0 TI	348	}
	349	}
	350	EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
	351
5e56bcea TI	352	/**
	353	* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
	354	* @codec: the codec object
	355	* @verb: verb to allow accessing via regmap
	356	*
	357	* Returns zero for success or a negative error code.
	358	*/
	359	int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
	360	unsigned int verb)
	361	{
	362	unsigned int *p = snd_array_new(&codec->vendor_verbs);
	363
	364	if (!p)
	365	return -ENOMEM;
	366	*p = verb;
	367	return 0;
	368	}
	369	EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
	370
4d75faa0 TI	371	/*
	372	* helper functions
	373	*/
	374
	375	/* write a pseudo-register value (w/o power sequence) */
	376	static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
	377	unsigned int val)
	378	{
	379	if (!codec->regmap)
	380	return hda_reg_write(codec, reg, val);
	381	else
	382	return regmap_write(codec->regmap, reg, val);
	383	}
	384
	385	/**
	386	* snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
	387	* @codec: the codec object
	388	* @reg: pseudo register
	389	* @val: value to write
	390	*
	391	* Returns zero if successful or a negative error code.
	392	*/
	393	int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
	394	unsigned int val)
	395	{
	396	int err;
	397
	398	err = reg_raw_write(codec, reg, val);
	399	if (err == -EAGAIN) {
	400	snd_hdac_power_up(codec);
	401	err = reg_raw_write(codec, reg, val);
	402	snd_hdac_power_down(codec);
	403	}
	404	return err;
	405	}
	406	EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
	407
	408	static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
	409	unsigned int *val)
	410	{
	411	if (!codec->regmap)
	412	return hda_reg_read(codec, reg, val);
	413	else
	414	return regmap_read(codec->regmap, reg, val);
	415	}
	416
	417	/**
	418	* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
	419	* @codec: the codec object
	420	* @reg: pseudo register
	421	* @val: pointer to store the read value
	422	*
	423	* Returns zero if successful or a negative error code.
	424	*/
	425	int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
	426	unsigned int *val)
	427	{
	428	int err;
	429
	430	err = reg_raw_read(codec, reg, val);
	431	if (err == -EAGAIN) {
	432	snd_hdac_power_up(codec);
	433	err = reg_raw_read(codec, reg, val);
	434	snd_hdac_power_down(codec);
435	}
436	return err;
437	}
438	EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
439
440	/**
441	* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
442	* @codec: the codec object
443	* @reg: pseudo register
444	* @mask: bit mask to udpate
445	* @val: value to update
446	*
447	* Returns zero if successful or a negative error code.
448	*/
449	int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
450	unsigned int mask, unsigned int val)
451	{
452	unsigned int orig;
453	int err;
454
455	val &= mask;
456	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
457	if (err < 0)
458	return err;
459	val \|= orig & ~mask;
460	if (val == orig)
461	return 0;
462	err = snd_hdac_regmap_write_raw(codec, reg, val);
463	if (err < 0)
464	return err;
465	return 1;
466	}
467	EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);