mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
5e56bcea50
Codecs may have own vendor-specific verbs, and we need to allow each driver to give such verbs for cached accesses. Here a verb can be put into a single array and looked through it at readable and writeable callbacks. Signed-off-by: Takashi Iwai <tiwai@suse.de>
340 lines
7.9 KiB
C
340 lines
7.9 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>
|
|
|
|
#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)
|
|
{
|
|
unsigned int verb = get_verb(reg);
|
|
|
|
switch (verb) {
|
|
case AC_VERB_GET_PROC_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 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);
|
|
}
|
|
|
|
static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
|
|
{
|
|
struct hdac_device *codec = context;
|
|
|
|
if (!codec_is_running(codec))
|
|
return -EAGAIN;
|
|
reg |= (codec->addr << 28);
|
|
return snd_hdac_exec_verb(codec, reg, 0, val);
|
|
}
|
|
|
|
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);
|
|
verb = get_verb(reg);
|
|
|
|
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);
|