[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_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;

	if (!codec_is_running(codec) && verb != AC_VERB_GET_POWER_STATE)
		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;

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

	if (!codec_is_running(codec) && verb != AC_VERB_SET_POWER_STATE)
		return codec->lazy_cache ? 0 : -EAGAIN;

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

	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,
	.use_single_rw = true,
};

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 | 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) {
		snd_hdac_power_up_pm(codec);
		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)
{
	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_pm(codec);
		err = reg_raw_read(codec, reg, val);
		snd_hdac_power_down_pm(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:
4d75faa0 TI	91	case AC_VERB_GET_PIN_WIDGET_CONTROL:
	92	case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
	93	case AC_VERB_GET_BEEP_CONTROL:
	94	case AC_VERB_GET_EAPD_BTLENABLE:
	95	case AC_VERB_GET_DIGI_CONVERT_1:
	96	case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
	97	case AC_VERB_GET_VOLUME_KNOB_CONTROL:
4d75faa0 TI	98	case AC_VERB_GET_GPIO_MASK:
	99	case AC_VERB_GET_GPIO_DIRECTION:
	100	case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
	101	case AC_VERB_GET_GPIO_WAKE_MASK:
	102	case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
	103	case AC_VERB_GET_GPIO_STICKY_MASK:
4d75faa0 TI	104	return true;
	105	}
	106
	107	return false;
	108	}
	109
	110	static bool hda_readable_reg(struct device *dev, unsigned int reg)
	111	{
faa75f8a	112	struct hdac_device *codec = dev_to_hdac_dev(dev);
4d75faa0 TI	113	unsigned int verb = get_verb(reg);
4d75faa0 TI	114
faa75f8a TI	115	if (codec->caps_overwriting)
	116	return true;
	117
4d75faa0 TI	118	switch (verb) {
	119	case AC_VERB_PARAMETERS:
	120	case AC_VERB_GET_CONNECT_LIST:
	121	case AC_VERB_GET_SUBSYSTEM_ID:
	122	return true;
8bc174e9 TI	123	/* below are basically writable, but disabled for reducing unnecessary
	124	* writes at sync
	125	*/
	126	case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
	127	case AC_VERB_GET_CONV: /* managed in PCM code */
	128	case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
	129	return true;
4d75faa0 TI	130	}
	131
	132	return hda_writeable_reg(dev, reg);
	133	}
	134
d313e0a8 TI	135	/*
	136	* Stereo amp pseudo register:
	137	* for making easier to handle the stereo volume control, we provide a
	138	* fake register to deal both left and right channels by a single
	139	* (pseudo) register access. A verb consisting of SET_AMP_GAIN with
	140	* both SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
	141	* for the left and the upper 8bit for the right channel.
	142	*/
	143	static bool is_stereo_amp_verb(unsigned int reg)
	144	{
	145	if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
	146	return false;
	147	return (reg & (AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT)) ==
	148	(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	149	}
	150
	151	/* read a pseudo stereo amp register (16bit left+right) */
	152	static int hda_reg_read_stereo_amp(struct hdac_device *codec,
	153	unsigned int reg, unsigned int *val)
	154	{
	155	unsigned int left, right;
	156	int err;
	157
	158	reg &= ~(AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT);
	159	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_LEFT, 0, &left);
	160	if (err < 0)
	161	return err;
	162	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_GET_RIGHT, 0, &right);
	163	if (err < 0)
	164	return err;
	165	*val = left \| (right << 8);
	166	return 0;
	167	}
	168
	169	/* write a pseudo stereo amp register (16bit left+right) */
	170	static int hda_reg_write_stereo_amp(struct hdac_device *codec,
	171	unsigned int reg, unsigned int val)
	172	{
	173	int err;
	174	unsigned int verb, left, right;
	175
	176	verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
	177	if (reg & AC_AMP_GET_OUTPUT)
	178	verb \|= AC_AMP_SET_OUTPUT;
	179	else
	180	verb \|= AC_AMP_SET_INPUT \| ((reg & 0xf) << 8);
	181	reg = (reg & ~0xfffff) \| verb;
	182
	183	left = val & 0xff;
	184	right = (val >> 8) & 0xff;
	185	if (left == right) {
	186	reg \|= AC_AMP_SET_LEFT \| AC_AMP_SET_RIGHT;
	187	return snd_hdac_exec_verb(codec, reg \| left, 0, NULL);
	188	}
	189
	190	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_LEFT \| left, 0, NULL);
	191	if (err < 0)
	192	return err;
	193	err = snd_hdac_exec_verb(codec, reg \| AC_AMP_SET_RIGHT \| right, 0, NULL);
	194	if (err < 0)
	195	return err;
	196	return 0;
	197	}
	198
40ba66a7 TI	199	/* read a pseudo coef register (16bit) */
	200	static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
	201	unsigned int *val)
	202	{
	203	unsigned int verb;
	204	int err;
	205
	206	if (!codec->cache_coef)
	207	return -EINVAL;
	208	/* LSB 8bit = coef index */
	209	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	210	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	211	if (err < 0)
	212	return err;
	213	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8);
	214	return snd_hdac_exec_verb(codec, verb, 0, val);
	215	}
	216
	217	/* write a pseudo coef register (16bit) */
	218	static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
	219	unsigned int val)
	220	{
	221	unsigned int verb;
	222	int err;
	223
	224	if (!codec->cache_coef)
	225	return -EINVAL;
	226	/* LSB 8bit = coef index */
	227	verb = (reg & ~0xfff00) \| (AC_VERB_SET_COEF_INDEX << 8);
	228	err = snd_hdac_exec_verb(codec, verb, 0, NULL);
	229	if (err < 0)
	230	return err;
	231	verb = (reg & ~0xfffff) \| (AC_VERB_GET_COEF_INDEX << 8) \|
	232	(val & 0xffff);
	233	return snd_hdac_exec_verb(codec, verb, 0, NULL);
	234	}
	235
4d75faa0 TI	236	static int hda_reg_read(void context, unsigned int reg, unsigned int val)
	237	{
	238	struct hdac_device *codec = context;
40ba66a7	239	int verb = get_verb(reg);
33f81940	240	int err;
4d75faa0	241
9efe2731	242	if (!codec_is_running(codec) && verb != AC_VERB_GET_POWER_STATE)
4d75faa0 TI	243	return -EAGAIN;
4d75faa0 TI	244	reg \|= (codec->addr << 28);
d313e0a8 TI	245	if (is_stereo_amp_verb(reg))
d313e0a8 TI	246	return hda_reg_read_stereo_amp(codec, reg, val);
40ba66a7 TI	247	if (verb == AC_VERB_GET_PROC_COEF)
40ba66a7 TI	248	return hda_reg_read_coef(codec, reg, val);
33f81940 TI	249	err = snd_hdac_exec_verb(codec, reg, 0, val);
	250	if (err < 0)
	251	return err;
	252	/* special handling for asymmetric reads */
40ba66a7	253	if (verb == AC_VERB_GET_POWER_STATE) {
33f81940 TI	254	if (*val & AC_PWRST_ERROR)
	255	*val = -1;
	256	else /* take only the actual state */
	257	val = (val >> 4) & 0x0f;
	258	}
	259	return 0;
4d75faa0 TI	260	}
	261
	262	static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
	263	{
	264	struct hdac_device *codec = context;
	265	unsigned int verb;
	266	int i, bytes, err;
	267
4d75faa0 TI	268	reg &= ~0x00080000U; /* drop GET bit */
4d75faa0 TI	269	reg \|= (codec->addr << 28);
9efe2731 TI	270	verb = get_verb(reg);
	271
	272	if (!codec_is_running(codec) && verb != AC_VERB_SET_POWER_STATE)
	273	return codec->lazy_cache ? 0 : -EAGAIN;
4d75faa0	274
d313e0a8 TI	275	if (is_stereo_amp_verb(reg))
	276	return hda_reg_write_stereo_amp(codec, reg, val);
	277
40ba66a7 TI	278	if (verb == AC_VERB_SET_PROC_COEF)
	279	return hda_reg_write_coef(codec, reg, val);
	280
4d75faa0 TI	281	switch (verb & 0xf00) {
	282	case AC_VERB_SET_AMP_GAIN_MUTE:
	283	verb = AC_VERB_SET_AMP_GAIN_MUTE;
	284	if (reg & AC_AMP_GET_LEFT)
	285	verb \|= AC_AMP_SET_LEFT >> 8;
	286	else
	287	verb \|= AC_AMP_SET_RIGHT >> 8;
	288	if (reg & AC_AMP_GET_OUTPUT) {
	289	verb \|= AC_AMP_SET_OUTPUT >> 8;
	290	} else {
	291	verb \|= AC_AMP_SET_INPUT >> 8;
	292	verb \|= reg & 0xf;
	293	}
	294	break;
	295	}
	296
	297	switch (verb) {
	298	case AC_VERB_SET_DIGI_CONVERT_1:
	299	bytes = 2;
	300	break;
	301	case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
	302	bytes = 4;
	303	break;
	304	default:
	305	bytes = 1;
	306	break;
	307	}
	308
	309	for (i = 0; i < bytes; i++) {
	310	reg &= ~0xfffff;
	311	reg \|= (verb + i) << 8 \| ((val >> (8 * i)) & 0xff);
	312	err = snd_hdac_exec_verb(codec, reg, 0, NULL);
	313	if (err < 0)
	314	return err;
	315	}
	316
	317	return 0;
	318	}
	319
	320	static const struct regmap_config hda_regmap_cfg = {
	321	.name = "hdaudio",
	322	.reg_bits = 32,
	323	.val_bits = 32,
	324	.max_register = 0xfffffff,
	325	.writeable_reg = hda_writeable_reg,
	326	.readable_reg = hda_readable_reg,
	327	.volatile_reg = hda_volatile_reg,
	328	.cache_type = REGCACHE_RBTREE,
	329	.reg_read = hda_reg_read,
	330	.reg_write = hda_reg_write,
9d82f927	331	.use_single_rw = true,
4d75faa0 TI	332	};
	333
	334	int snd_hdac_regmap_init(struct hdac_device *codec)
	335	{
	336	struct regmap *regmap;
	337
	338	regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
	339	if (IS_ERR(regmap))
	340	return PTR_ERR(regmap);
	341	codec->regmap = regmap;
5e56bcea	342	snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
4d75faa0 TI	343	return 0;
	344	}
	345	EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
	346
	347	void snd_hdac_regmap_exit(struct hdac_device *codec)
	348	{
	349	if (codec->regmap) {
	350	regmap_exit(codec->regmap);
	351	codec->regmap = NULL;
5e56bcea	352	snd_array_free(&codec->vendor_verbs);
4d75faa0 TI	353	}
	354	}
	355	EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
	356
5e56bcea TI	357	/**
	358	* snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
	359	* @codec: the codec object
	360	* @verb: verb to allow accessing via regmap
	361	*
	362	* Returns zero for success or a negative error code.
	363	*/
	364	int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
	365	unsigned int verb)
	366	{
	367	unsigned int *p = snd_array_new(&codec->vendor_verbs);
	368
	369	if (!p)
	370	return -ENOMEM;
d6eb9e3e	371	p = verb \| 0x800; / set GET bit */
5e56bcea TI	372	return 0;
	373	}
	374	EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
	375
4d75faa0 TI	376	/*
	377	* helper functions
	378	*/
	379
	380	/* write a pseudo-register value (w/o power sequence) */
	381	static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
	382	unsigned int val)
	383	{
	384	if (!codec->regmap)
	385	return hda_reg_write(codec, reg, val);
	386	else
	387	return regmap_write(codec->regmap, reg, val);
	388	}
	389
	390	/**
	391	* snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
	392	* @codec: the codec object
	393	* @reg: pseudo register
	394	* @val: value to write
	395	*
	396	* Returns zero if successful or a negative error code.
	397	*/
	398	int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
	399	unsigned int val)
	400	{
	401	int err;
	402
	403	err = reg_raw_write(codec, reg, val);
	404	if (err == -EAGAIN) {
664c7155	405	snd_hdac_power_up_pm(codec);
4d75faa0	406	err = reg_raw_write(codec, reg, val);
664c7155	407	snd_hdac_power_down_pm(codec);
4d75faa0 TI	408	}
	409	return err;
	410	}
	411	EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
	412
	413	static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
	414	unsigned int *val)
	415	{
	416	if (!codec->regmap)
	417	return hda_reg_read(codec, reg, val);
	418	else
	419	return regmap_read(codec->regmap, reg, val);
	420	}
	421
	422	/**
	423	* snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
	424	* @codec: the codec object
	425	* @reg: pseudo register
	426	* @val: pointer to store the read value
	427	*
	428	* Returns zero if successful or a negative error code.
	429	*/
	430	int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
	431	unsigned int *val)
	432	{
	433	int err;
	434
	435	err = reg_raw_read(codec, reg, val);
	436	if (err == -EAGAIN) {
664c7155	437	snd_hdac_power_up_pm(codec);
4d75faa0	438	err = reg_raw_read(codec, reg, val);
664c7155	439	snd_hdac_power_down_pm(codec);
4d75faa0 TI	440	}
	441	return err;
	442	}
	443	EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
	444
	445	/**
	446	* snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
	447	* @codec: the codec object
	448	* @reg: pseudo register
	449	* @mask: bit mask to udpate
	450	* @val: value to update
	451	*
	452	* Returns zero if successful or a negative error code.
	453	*/
	454	int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
	455	unsigned int mask, unsigned int val)
	456	{
	457	unsigned int orig;
	458	int err;
	459
	460	val &= mask;
	461	err = snd_hdac_regmap_read_raw(codec, reg, &orig);
	462	if (err < 0)
	463	return err;
	464	val \|= orig & ~mask;
	465	if (val == orig)
	466	return 0;
	467	err = snd_hdac_regmap_write_raw(codec, reg, val);
	468	if (err < 0)
	469	return err;
	470	return 1;
	471	}
	472	EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);