533 lines
13 KiB
C
533 lines
13 KiB
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_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);
|