722 lines
18 KiB
C
722 lines
18 KiB
C
/*
|
|
* soc-cache.c -- ASoC register cache helpers
|
|
*
|
|
* Copyright 2009 Wolfson Microelectronics PLC.
|
|
*
|
|
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <sound/soc.h>
|
|
#include <linux/bitmap.h>
|
|
#include <linux/rbtree.h>
|
|
#include <linux/export.h>
|
|
|
|
#include <trace/events/asoc.h>
|
|
|
|
static bool snd_soc_set_cache_val(void *base, unsigned int idx,
|
|
unsigned int val, unsigned int word_size)
|
|
{
|
|
switch (word_size) {
|
|
case 1: {
|
|
u8 *cache = base;
|
|
if (cache[idx] == val)
|
|
return true;
|
|
cache[idx] = val;
|
|
break;
|
|
}
|
|
case 2: {
|
|
u16 *cache = base;
|
|
if (cache[idx] == val)
|
|
return true;
|
|
cache[idx] = val;
|
|
break;
|
|
}
|
|
default:
|
|
BUG();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
|
|
unsigned int word_size)
|
|
{
|
|
if (!base)
|
|
return -1;
|
|
|
|
switch (word_size) {
|
|
case 1: {
|
|
const u8 *cache = base;
|
|
return cache[idx];
|
|
}
|
|
case 2: {
|
|
const u16 *cache = base;
|
|
return cache[idx];
|
|
}
|
|
default:
|
|
BUG();
|
|
}
|
|
/* unreachable */
|
|
return -1;
|
|
}
|
|
|
|
struct snd_soc_rbtree_node {
|
|
struct rb_node node; /* the actual rbtree node holding this block */
|
|
unsigned int base_reg; /* base register handled by this block */
|
|
unsigned int word_size; /* number of bytes needed to represent the register index */
|
|
void *block; /* block of adjacent registers */
|
|
unsigned int blklen; /* number of registers available in the block */
|
|
} __attribute__ ((packed));
|
|
|
|
struct snd_soc_rbtree_ctx {
|
|
struct rb_root root;
|
|
struct snd_soc_rbtree_node *cached_rbnode;
|
|
};
|
|
|
|
static inline void snd_soc_rbtree_get_base_top_reg(
|
|
struct snd_soc_rbtree_node *rbnode,
|
|
unsigned int *base, unsigned int *top)
|
|
{
|
|
*base = rbnode->base_reg;
|
|
*top = rbnode->base_reg + rbnode->blklen - 1;
|
|
}
|
|
|
|
static unsigned int snd_soc_rbtree_get_register(
|
|
struct snd_soc_rbtree_node *rbnode, unsigned int idx)
|
|
{
|
|
unsigned int val;
|
|
|
|
switch (rbnode->word_size) {
|
|
case 1: {
|
|
u8 *p = rbnode->block;
|
|
val = p[idx];
|
|
return val;
|
|
}
|
|
case 2: {
|
|
u16 *p = rbnode->block;
|
|
val = p[idx];
|
|
return val;
|
|
}
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void snd_soc_rbtree_set_register(struct snd_soc_rbtree_node *rbnode,
|
|
unsigned int idx, unsigned int val)
|
|
{
|
|
switch (rbnode->word_size) {
|
|
case 1: {
|
|
u8 *p = rbnode->block;
|
|
p[idx] = val;
|
|
break;
|
|
}
|
|
case 2: {
|
|
u16 *p = rbnode->block;
|
|
p[idx] = val;
|
|
break;
|
|
}
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct snd_soc_rbtree_node *snd_soc_rbtree_lookup(
|
|
struct rb_root *root, unsigned int reg)
|
|
{
|
|
struct rb_node *node;
|
|
struct snd_soc_rbtree_node *rbnode;
|
|
unsigned int base_reg, top_reg;
|
|
|
|
node = root->rb_node;
|
|
while (node) {
|
|
rbnode = container_of(node, struct snd_soc_rbtree_node, node);
|
|
snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
|
|
if (reg >= base_reg && reg <= top_reg)
|
|
return rbnode;
|
|
else if (reg > top_reg)
|
|
node = node->rb_right;
|
|
else if (reg < base_reg)
|
|
node = node->rb_left;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int snd_soc_rbtree_insert(struct rb_root *root,
|
|
struct snd_soc_rbtree_node *rbnode)
|
|
{
|
|
struct rb_node **new, *parent;
|
|
struct snd_soc_rbtree_node *rbnode_tmp;
|
|
unsigned int base_reg_tmp, top_reg_tmp;
|
|
unsigned int base_reg;
|
|
|
|
parent = NULL;
|
|
new = &root->rb_node;
|
|
while (*new) {
|
|
rbnode_tmp = container_of(*new, struct snd_soc_rbtree_node,
|
|
node);
|
|
/* base and top registers of the current rbnode */
|
|
snd_soc_rbtree_get_base_top_reg(rbnode_tmp, &base_reg_tmp,
|
|
&top_reg_tmp);
|
|
/* base register of the rbnode to be added */
|
|
base_reg = rbnode->base_reg;
|
|
parent = *new;
|
|
/* if this register has already been inserted, just return */
|
|
if (base_reg >= base_reg_tmp &&
|
|
base_reg <= top_reg_tmp)
|
|
return 0;
|
|
else if (base_reg > top_reg_tmp)
|
|
new = &((*new)->rb_right);
|
|
else if (base_reg < base_reg_tmp)
|
|
new = &((*new)->rb_left);
|
|
}
|
|
|
|
/* insert the node into the rbtree */
|
|
rb_link_node(&rbnode->node, parent, new);
|
|
rb_insert_color(&rbnode->node, root);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec)
|
|
{
|
|
struct snd_soc_rbtree_ctx *rbtree_ctx;
|
|
struct rb_node *node;
|
|
struct snd_soc_rbtree_node *rbnode;
|
|
unsigned int regtmp;
|
|
unsigned int val, def;
|
|
int ret;
|
|
int i;
|
|
|
|
rbtree_ctx = codec->reg_cache;
|
|
for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
|
|
rbnode = rb_entry(node, struct snd_soc_rbtree_node, node);
|
|
for (i = 0; i < rbnode->blklen; ++i) {
|
|
regtmp = rbnode->base_reg + i;
|
|
val = snd_soc_rbtree_get_register(rbnode, i);
|
|
def = snd_soc_get_cache_val(codec->reg_def_copy, i,
|
|
rbnode->word_size);
|
|
if (val == def)
|
|
continue;
|
|
|
|
WARN_ON(!snd_soc_codec_writable_register(codec, regtmp));
|
|
|
|
codec->cache_bypass = 1;
|
|
ret = snd_soc_write(codec, regtmp, val);
|
|
codec->cache_bypass = 0;
|
|
if (ret)
|
|
return ret;
|
|
dev_dbg(codec->dev, "Synced register %#x, value = %#x\n",
|
|
regtmp, val);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_rbtree_insert_to_block(struct snd_soc_rbtree_node *rbnode,
|
|
unsigned int pos, unsigned int reg,
|
|
unsigned int value)
|
|
{
|
|
u8 *blk;
|
|
|
|
blk = krealloc(rbnode->block,
|
|
(rbnode->blklen + 1) * rbnode->word_size, GFP_KERNEL);
|
|
if (!blk)
|
|
return -ENOMEM;
|
|
|
|
/* insert the register value in the correct place in the rbnode block */
|
|
memmove(blk + (pos + 1) * rbnode->word_size,
|
|
blk + pos * rbnode->word_size,
|
|
(rbnode->blklen - pos) * rbnode->word_size);
|
|
|
|
/* update the rbnode block, its size and the base register */
|
|
rbnode->block = blk;
|
|
rbnode->blklen++;
|
|
if (!pos)
|
|
rbnode->base_reg = reg;
|
|
|
|
snd_soc_rbtree_set_register(rbnode, pos, value);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_rbtree_cache_write(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int value)
|
|
{
|
|
struct snd_soc_rbtree_ctx *rbtree_ctx;
|
|
struct snd_soc_rbtree_node *rbnode, *rbnode_tmp;
|
|
struct rb_node *node;
|
|
unsigned int val;
|
|
unsigned int reg_tmp;
|
|
unsigned int base_reg, top_reg;
|
|
unsigned int pos;
|
|
int i;
|
|
int ret;
|
|
|
|
rbtree_ctx = codec->reg_cache;
|
|
/* look up the required register in the cached rbnode */
|
|
rbnode = rbtree_ctx->cached_rbnode;
|
|
if (rbnode) {
|
|
snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
|
|
if (reg >= base_reg && reg <= top_reg) {
|
|
reg_tmp = reg - base_reg;
|
|
val = snd_soc_rbtree_get_register(rbnode, reg_tmp);
|
|
if (val == value)
|
|
return 0;
|
|
snd_soc_rbtree_set_register(rbnode, reg_tmp, value);
|
|
return 0;
|
|
}
|
|
}
|
|
/* if we can't locate it in the cached rbnode we'll have
|
|
* to traverse the rbtree looking for it.
|
|
*/
|
|
rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg);
|
|
if (rbnode) {
|
|
reg_tmp = reg - rbnode->base_reg;
|
|
val = snd_soc_rbtree_get_register(rbnode, reg_tmp);
|
|
if (val == value)
|
|
return 0;
|
|
snd_soc_rbtree_set_register(rbnode, reg_tmp, value);
|
|
rbtree_ctx->cached_rbnode = rbnode;
|
|
} else {
|
|
/* bail out early, no need to create the rbnode yet */
|
|
if (!value)
|
|
return 0;
|
|
/* look for an adjacent register to the one we are about to add */
|
|
for (node = rb_first(&rbtree_ctx->root); node;
|
|
node = rb_next(node)) {
|
|
rbnode_tmp = rb_entry(node, struct snd_soc_rbtree_node, node);
|
|
for (i = 0; i < rbnode_tmp->blklen; ++i) {
|
|
reg_tmp = rbnode_tmp->base_reg + i;
|
|
if (abs(reg_tmp - reg) != 1)
|
|
continue;
|
|
/* decide where in the block to place our register */
|
|
if (reg_tmp + 1 == reg)
|
|
pos = i + 1;
|
|
else
|
|
pos = i;
|
|
ret = snd_soc_rbtree_insert_to_block(rbnode_tmp, pos,
|
|
reg, value);
|
|
if (ret)
|
|
return ret;
|
|
rbtree_ctx->cached_rbnode = rbnode_tmp;
|
|
return 0;
|
|
}
|
|
}
|
|
/* we did not manage to find a place to insert it in an existing
|
|
* block so create a new rbnode with a single register in its block.
|
|
* This block will get populated further if any other adjacent
|
|
* registers get modified in the future.
|
|
*/
|
|
rbnode = kzalloc(sizeof *rbnode, GFP_KERNEL);
|
|
if (!rbnode)
|
|
return -ENOMEM;
|
|
rbnode->blklen = 1;
|
|
rbnode->base_reg = reg;
|
|
rbnode->word_size = codec->driver->reg_word_size;
|
|
rbnode->block = kmalloc(rbnode->blklen * rbnode->word_size,
|
|
GFP_KERNEL);
|
|
if (!rbnode->block) {
|
|
kfree(rbnode);
|
|
return -ENOMEM;
|
|
}
|
|
snd_soc_rbtree_set_register(rbnode, 0, value);
|
|
snd_soc_rbtree_insert(&rbtree_ctx->root, rbnode);
|
|
rbtree_ctx->cached_rbnode = rbnode;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_rbtree_cache_read(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int *value)
|
|
{
|
|
struct snd_soc_rbtree_ctx *rbtree_ctx;
|
|
struct snd_soc_rbtree_node *rbnode;
|
|
unsigned int base_reg, top_reg;
|
|
unsigned int reg_tmp;
|
|
|
|
rbtree_ctx = codec->reg_cache;
|
|
/* look up the required register in the cached rbnode */
|
|
rbnode = rbtree_ctx->cached_rbnode;
|
|
if (rbnode) {
|
|
snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
|
|
if (reg >= base_reg && reg <= top_reg) {
|
|
reg_tmp = reg - base_reg;
|
|
*value = snd_soc_rbtree_get_register(rbnode, reg_tmp);
|
|
return 0;
|
|
}
|
|
}
|
|
/* if we can't locate it in the cached rbnode we'll have
|
|
* to traverse the rbtree looking for it.
|
|
*/
|
|
rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg);
|
|
if (rbnode) {
|
|
reg_tmp = reg - rbnode->base_reg;
|
|
*value = snd_soc_rbtree_get_register(rbnode, reg_tmp);
|
|
rbtree_ctx->cached_rbnode = rbnode;
|
|
} else {
|
|
/* uninitialized registers default to 0 */
|
|
*value = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec)
|
|
{
|
|
struct rb_node *next;
|
|
struct snd_soc_rbtree_ctx *rbtree_ctx;
|
|
struct snd_soc_rbtree_node *rbtree_node;
|
|
|
|
/* if we've already been called then just return */
|
|
rbtree_ctx = codec->reg_cache;
|
|
if (!rbtree_ctx)
|
|
return 0;
|
|
|
|
/* free up the rbtree */
|
|
next = rb_first(&rbtree_ctx->root);
|
|
while (next) {
|
|
rbtree_node = rb_entry(next, struct snd_soc_rbtree_node, node);
|
|
next = rb_next(&rbtree_node->node);
|
|
rb_erase(&rbtree_node->node, &rbtree_ctx->root);
|
|
kfree(rbtree_node->block);
|
|
kfree(rbtree_node);
|
|
}
|
|
|
|
/* release the resources */
|
|
kfree(codec->reg_cache);
|
|
codec->reg_cache = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec)
|
|
{
|
|
struct snd_soc_rbtree_ctx *rbtree_ctx;
|
|
unsigned int word_size;
|
|
unsigned int val;
|
|
int i;
|
|
int ret;
|
|
|
|
codec->reg_cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL);
|
|
if (!codec->reg_cache)
|
|
return -ENOMEM;
|
|
|
|
rbtree_ctx = codec->reg_cache;
|
|
rbtree_ctx->root = RB_ROOT;
|
|
rbtree_ctx->cached_rbnode = NULL;
|
|
|
|
if (!codec->reg_def_copy)
|
|
return 0;
|
|
|
|
word_size = codec->driver->reg_word_size;
|
|
for (i = 0; i < codec->driver->reg_cache_size; ++i) {
|
|
val = snd_soc_get_cache_val(codec->reg_def_copy, i,
|
|
word_size);
|
|
if (!val)
|
|
continue;
|
|
ret = snd_soc_rbtree_cache_write(codec, i, val);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
snd_soc_cache_exit(codec);
|
|
return ret;
|
|
}
|
|
|
|
static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
|
|
{
|
|
int i;
|
|
int ret;
|
|
const struct snd_soc_codec_driver *codec_drv;
|
|
unsigned int val;
|
|
|
|
codec_drv = codec->driver;
|
|
for (i = 0; i < codec_drv->reg_cache_size; ++i) {
|
|
ret = snd_soc_cache_read(codec, i, &val);
|
|
if (ret)
|
|
return ret;
|
|
if (codec->reg_def_copy)
|
|
if (snd_soc_get_cache_val(codec->reg_def_copy,
|
|
i, codec_drv->reg_word_size) == val)
|
|
continue;
|
|
|
|
WARN_ON(!snd_soc_codec_writable_register(codec, i));
|
|
|
|
ret = snd_soc_write(codec, i, val);
|
|
if (ret)
|
|
return ret;
|
|
dev_dbg(codec->dev, "Synced register %#x, value = %#x\n",
|
|
i, val);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_flat_cache_write(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int value)
|
|
{
|
|
snd_soc_set_cache_val(codec->reg_cache, reg, value,
|
|
codec->driver->reg_word_size);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_flat_cache_read(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int *value)
|
|
{
|
|
*value = snd_soc_get_cache_val(codec->reg_cache, reg,
|
|
codec->driver->reg_word_size);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
|
|
{
|
|
if (!codec->reg_cache)
|
|
return 0;
|
|
kfree(codec->reg_cache);
|
|
codec->reg_cache = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
|
|
{
|
|
if (codec->reg_def_copy)
|
|
codec->reg_cache = kmemdup(codec->reg_def_copy,
|
|
codec->reg_size, GFP_KERNEL);
|
|
else
|
|
codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL);
|
|
if (!codec->reg_cache)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* an array of all supported compression types */
|
|
static const struct snd_soc_cache_ops cache_types[] = {
|
|
/* Flat *must* be the first entry for fallback */
|
|
{
|
|
.id = SND_SOC_FLAT_COMPRESSION,
|
|
.name = "flat",
|
|
.init = snd_soc_flat_cache_init,
|
|
.exit = snd_soc_flat_cache_exit,
|
|
.read = snd_soc_flat_cache_read,
|
|
.write = snd_soc_flat_cache_write,
|
|
.sync = snd_soc_flat_cache_sync
|
|
},
|
|
{
|
|
.id = SND_SOC_RBTREE_COMPRESSION,
|
|
.name = "rbtree",
|
|
.init = snd_soc_rbtree_cache_init,
|
|
.exit = snd_soc_rbtree_cache_exit,
|
|
.read = snd_soc_rbtree_cache_read,
|
|
.write = snd_soc_rbtree_cache_write,
|
|
.sync = snd_soc_rbtree_cache_sync
|
|
}
|
|
};
|
|
|
|
int snd_soc_cache_init(struct snd_soc_codec *codec)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cache_types); ++i)
|
|
if (cache_types[i].id == codec->compress_type)
|
|
break;
|
|
|
|
/* Fall back to flat compression */
|
|
if (i == ARRAY_SIZE(cache_types)) {
|
|
dev_warn(codec->dev, "Could not match compress type: %d\n",
|
|
codec->compress_type);
|
|
i = 0;
|
|
}
|
|
|
|
mutex_init(&codec->cache_rw_mutex);
|
|
codec->cache_ops = &cache_types[i];
|
|
|
|
if (codec->cache_ops->init) {
|
|
if (codec->cache_ops->name)
|
|
dev_dbg(codec->dev, "Initializing %s cache for %s codec\n",
|
|
codec->cache_ops->name, codec->name);
|
|
return codec->cache_ops->init(codec);
|
|
}
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/*
|
|
* NOTE: keep in mind that this function might be called
|
|
* multiple times.
|
|
*/
|
|
int snd_soc_cache_exit(struct snd_soc_codec *codec)
|
|
{
|
|
if (codec->cache_ops && codec->cache_ops->exit) {
|
|
if (codec->cache_ops->name)
|
|
dev_dbg(codec->dev, "Destroying %s cache for %s codec\n",
|
|
codec->cache_ops->name, codec->name);
|
|
return codec->cache_ops->exit(codec);
|
|
}
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/**
|
|
* snd_soc_cache_read: Fetch the value of a given register from the cache.
|
|
*
|
|
* @codec: CODEC to configure.
|
|
* @reg: The register index.
|
|
* @value: The value to be returned.
|
|
*/
|
|
int snd_soc_cache_read(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int *value)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&codec->cache_rw_mutex);
|
|
|
|
if (value && codec->cache_ops && codec->cache_ops->read) {
|
|
ret = codec->cache_ops->read(codec, reg, value);
|
|
mutex_unlock(&codec->cache_rw_mutex);
|
|
return ret;
|
|
}
|
|
|
|
mutex_unlock(&codec->cache_rw_mutex);
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_cache_read);
|
|
|
|
/**
|
|
* snd_soc_cache_write: Set the value of a given register in the cache.
|
|
*
|
|
* @codec: CODEC to configure.
|
|
* @reg: The register index.
|
|
* @value: The new register value.
|
|
*/
|
|
int snd_soc_cache_write(struct snd_soc_codec *codec,
|
|
unsigned int reg, unsigned int value)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&codec->cache_rw_mutex);
|
|
|
|
if (codec->cache_ops && codec->cache_ops->write) {
|
|
ret = codec->cache_ops->write(codec, reg, value);
|
|
mutex_unlock(&codec->cache_rw_mutex);
|
|
return ret;
|
|
}
|
|
|
|
mutex_unlock(&codec->cache_rw_mutex);
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_cache_write);
|
|
|
|
/**
|
|
* snd_soc_cache_sync: Sync the register cache with the hardware.
|
|
*
|
|
* @codec: CODEC to configure.
|
|
*
|
|
* Any registers that should not be synced should be marked as
|
|
* volatile. In general drivers can choose not to use the provided
|
|
* syncing functionality if they so require.
|
|
*/
|
|
int snd_soc_cache_sync(struct snd_soc_codec *codec)
|
|
{
|
|
int ret;
|
|
const char *name;
|
|
|
|
if (!codec->cache_sync) {
|
|
return 0;
|
|
}
|
|
|
|
if (!codec->cache_ops || !codec->cache_ops->sync)
|
|
return -ENOSYS;
|
|
|
|
if (codec->cache_ops->name)
|
|
name = codec->cache_ops->name;
|
|
else
|
|
name = "unknown";
|
|
|
|
if (codec->cache_ops->name)
|
|
dev_dbg(codec->dev, "Syncing %s cache for %s codec\n",
|
|
codec->cache_ops->name, codec->name);
|
|
trace_snd_soc_cache_sync(codec, name, "start");
|
|
ret = codec->cache_ops->sync(codec);
|
|
if (!ret)
|
|
codec->cache_sync = 0;
|
|
trace_snd_soc_cache_sync(codec, name, "end");
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_cache_sync);
|
|
|
|
static int snd_soc_get_reg_access_index(struct snd_soc_codec *codec,
|
|
unsigned int reg)
|
|
{
|
|
const struct snd_soc_codec_driver *codec_drv;
|
|
unsigned int min, max, index;
|
|
|
|
codec_drv = codec->driver;
|
|
min = 0;
|
|
max = codec_drv->reg_access_size - 1;
|
|
do {
|
|
index = (min + max) / 2;
|
|
if (codec_drv->reg_access_default[index].reg == reg)
|
|
return index;
|
|
if (codec_drv->reg_access_default[index].reg < reg)
|
|
min = index + 1;
|
|
else
|
|
max = index;
|
|
} while (min <= max);
|
|
return -1;
|
|
}
|
|
|
|
int snd_soc_default_volatile_register(struct snd_soc_codec *codec,
|
|
unsigned int reg)
|
|
{
|
|
int index;
|
|
|
|
if (reg >= codec->driver->reg_cache_size)
|
|
return 1;
|
|
index = snd_soc_get_reg_access_index(codec, reg);
|
|
if (index < 0)
|
|
return 0;
|
|
return codec->driver->reg_access_default[index].vol;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_default_volatile_register);
|
|
|
|
int snd_soc_default_readable_register(struct snd_soc_codec *codec,
|
|
unsigned int reg)
|
|
{
|
|
int index;
|
|
|
|
if (reg >= codec->driver->reg_cache_size)
|
|
return 1;
|
|
index = snd_soc_get_reg_access_index(codec, reg);
|
|
if (index < 0)
|
|
return 0;
|
|
return codec->driver->reg_access_default[index].read;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_default_readable_register);
|
|
|
|
int snd_soc_default_writable_register(struct snd_soc_codec *codec,
|
|
unsigned int reg)
|
|
{
|
|
int index;
|
|
|
|
if (reg >= codec->driver->reg_cache_size)
|
|
return 1;
|
|
index = snd_soc_get_reg_access_index(codec, reg);
|
|
if (index < 0)
|
|
return 0;
|
|
return codec->driver->reg_access_default[index].write;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_default_writable_register);
|