forked from Minki/linux
ASoC: soc-cache: Clean up the cache manipulation code
Use Takashi's clean up code to make the cache manipulation code more readable. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos
Mark Brown
parent
0378b6acc8
commit
1321e8838b
@ -761,6 +761,49 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
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}
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EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
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static bool snd_soc_set_cache_val(void *base, unsigned int idx,
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unsigned int val, unsigned int word_size)
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{
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switch (word_size) {
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case 1: {
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u8 *cache = base;
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if (cache[idx] == val)
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return true;
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cache[idx] = val;
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break;
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}
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case 2: {
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u16 *cache = base;
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if (cache[idx] == val)
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return true;
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cache[idx] = val;
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break;
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}
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default:
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BUG();
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}
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return false;
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}
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static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
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unsigned int word_size)
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{
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switch (word_size) {
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case 1: {
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const u8 *cache = base;
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return cache[idx];
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}
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case 2: {
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const u16 *cache = base;
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return cache[idx];
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}
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default:
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BUG();
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}
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/* unreachable */
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return -1;
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}
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struct snd_soc_rbtree_node {
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struct rb_node node;
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unsigned int reg;
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@ -924,7 +967,12 @@ static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec)
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static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec)
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{
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struct snd_soc_rbtree_node *rbtree_node;
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struct snd_soc_rbtree_ctx *rbtree_ctx;
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unsigned int val;
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unsigned int word_size;
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int i;
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int ret;
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codec->reg_cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL);
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if (!codec->reg_cache)
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@ -936,53 +984,25 @@ static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec)
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if (!codec->reg_def_copy)
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return 0;
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/*
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* populate the rbtree with the initialized registers. All other
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* registers will be inserted into the tree when they are first written.
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*
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* The reasoning behind this, is that we need to step through and
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* dereference the cache in u8/u16 increments without sacrificing
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* portability. This could also be done using memcpy() but that would
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* be slightly more cryptic.
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*/
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#define snd_soc_rbtree_populate(cache) \
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({ \
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int ret, i; \
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struct snd_soc_rbtree_node *rbtree_node; \
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\
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ret = 0; \
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cache = codec->reg_def_copy; \
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for (i = 0; i < codec->driver->reg_cache_size; ++i) { \
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if (!cache[i]) \
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continue; \
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rbtree_node = kzalloc(sizeof *rbtree_node, GFP_KERNEL); \
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if (!rbtree_node) { \
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ret = -ENOMEM; \
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snd_soc_cache_exit(codec); \
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break; \
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} \
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rbtree_node->reg = i; \
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rbtree_node->value = cache[i]; \
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rbtree_node->defval = cache[i]; \
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snd_soc_rbtree_insert(&rbtree_ctx->root, \
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rbtree_node); \
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} \
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ret; \
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})
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switch (codec->driver->reg_word_size) {
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case 1: {
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const u8 *cache;
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return snd_soc_rbtree_populate(cache);
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}
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case 2: {
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const u16 *cache;
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return snd_soc_rbtree_populate(cache);
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}
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default:
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BUG();
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/*
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* populate the rbtree with the initialized registers. All other
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* registers will be inserted when they are first modified.
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*/
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word_size = codec->driver->reg_word_size;
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for (i = 0; i < codec->driver->reg_cache_size; ++i) {
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val = snd_soc_get_cache_val(codec->reg_def_copy, i, word_size);
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if (!val)
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continue;
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rbtree_node = kzalloc(sizeof *rbtree_node, GFP_KERNEL);
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if (!rbtree_node) {
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ret = -ENOMEM;
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snd_soc_cache_exit(codec);
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break;
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}
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rbtree_node->reg = i;
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rbtree_node->value = val;
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rbtree_node->defval = val;
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snd_soc_rbtree_insert(&rbtree_ctx->root, rbtree_node);
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}
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return 0;
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@ -1165,29 +1185,10 @@ static int snd_soc_lzo_cache_write(struct snd_soc_codec *codec,
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}
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/* write the new value to the cache */
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switch (codec->driver->reg_word_size) {
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case 1: {
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u8 *cache;
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cache = lzo_block->dst;
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if (cache[blkpos] == value) {
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kfree(lzo_block->dst);
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goto out;
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}
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cache[blkpos] = value;
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}
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break;
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case 2: {
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u16 *cache;
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cache = lzo_block->dst;
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if (cache[blkpos] == value) {
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kfree(lzo_block->dst);
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goto out;
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}
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cache[blkpos] = value;
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}
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break;
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default:
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BUG();
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if (snd_soc_set_cache_val(lzo_block->dst, blkpos, value,
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codec->driver->reg_word_size)) {
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kfree(lzo_block->dst);
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goto out;
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}
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/* prepare the source to be the decompressed block */
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@ -1241,25 +1242,10 @@ static int snd_soc_lzo_cache_read(struct snd_soc_codec *codec,
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/* decompress the block */
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ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block);
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if (ret >= 0) {
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if (ret >= 0)
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/* fetch the value from the cache */
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switch (codec->driver->reg_word_size) {
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case 1: {
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u8 *cache;
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cache = lzo_block->dst;
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*value = cache[blkpos];
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}
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break;
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case 2: {
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u16 *cache;
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cache = lzo_block->dst;
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*value = cache[blkpos];
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}
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break;
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default:
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BUG();
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}
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}
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*value = snd_soc_get_cache_val(lzo_block->dst, blkpos,
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codec->driver->reg_word_size);
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kfree(lzo_block->dst);
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/* restore the pointer and length of the compressed block */
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@ -1414,28 +1400,10 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
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ret = snd_soc_cache_read(codec, i, &val);
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if (ret)
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return ret;
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if (codec_drv->reg_cache_default) {
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switch (codec_drv->reg_word_size) {
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case 1: {
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const u8 *cache;
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cache = codec_drv->reg_cache_default;
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if (cache[i] == val)
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continue;
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}
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break;
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case 2: {
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const u16 *cache;
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cache = codec_drv->reg_cache_default;
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if (cache[i] == val)
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continue;
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}
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break;
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default:
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BUG();
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}
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}
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if (codec_drv->reg_cache_default)
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if (snd_soc_get_cache_val(codec_drv->reg_cache_default,
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i, codec_drv->reg_word_size) == val)
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continue;
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ret = snd_soc_write(codec, i, val);
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if (ret)
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return ret;
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@ -1448,50 +1416,16 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
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static int snd_soc_flat_cache_write(struct snd_soc_codec *codec,
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unsigned int reg, unsigned int value)
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{
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switch (codec->driver->reg_word_size) {
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case 1: {
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u8 *cache;
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cache = codec->reg_cache;
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cache[reg] = value;
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}
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break;
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case 2: {
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u16 *cache;
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cache = codec->reg_cache;
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cache[reg] = value;
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}
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break;
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default:
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BUG();
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}
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snd_soc_set_cache_val(codec->reg_cache, reg, value,
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codec->driver->reg_word_size);
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return 0;
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}
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static int snd_soc_flat_cache_read(struct snd_soc_codec *codec,
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unsigned int reg, unsigned int *value)
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{
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switch (codec->driver->reg_word_size) {
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case 1: {
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u8 *cache;
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cache = codec->reg_cache;
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*value = cache[reg];
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}
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break;
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case 2: {
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u16 *cache;
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cache = codec->reg_cache;
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*value = cache[reg];
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}
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break;
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default:
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BUG();
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}
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*value = snd_soc_get_cache_val(codec->reg_cache, reg,
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codec->driver->reg_word_size);
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return 0;
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}
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