mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 06:31:49 +00:00
ASoC: Remove rbtree register cache
All users now use regmap directly so delete the ASoC version of the code. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
parent
cae59c7b21
commit
1dfb6efd87
@ -266,7 +266,6 @@ enum snd_soc_control_type {
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enum snd_soc_compress_type {
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SND_SOC_FLAT_COMPRESSION = 1,
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SND_SOC_RBTREE_COMPRESSION
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};
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enum snd_soc_pcm_subclass {
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@ -66,378 +66,6 @@ static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
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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; /* the actual rbtree node holding this block */
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unsigned int base_reg; /* base register handled by this block */
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unsigned int word_size; /* number of bytes needed to represent the register index */
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void *block; /* block of adjacent registers */
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unsigned int blklen; /* number of registers available in the block */
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} __attribute__ ((packed));
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struct snd_soc_rbtree_ctx {
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struct rb_root root;
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struct snd_soc_rbtree_node *cached_rbnode;
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};
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static inline void snd_soc_rbtree_get_base_top_reg(
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struct snd_soc_rbtree_node *rbnode,
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unsigned int *base, unsigned int *top)
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{
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*base = rbnode->base_reg;
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*top = rbnode->base_reg + rbnode->blklen - 1;
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}
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static unsigned int snd_soc_rbtree_get_register(
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struct snd_soc_rbtree_node *rbnode, unsigned int idx)
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{
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unsigned int val;
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switch (rbnode->word_size) {
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case 1: {
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u8 *p = rbnode->block;
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val = p[idx];
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return val;
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}
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case 2: {
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u16 *p = rbnode->block;
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val = p[idx];
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return val;
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}
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default:
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BUG();
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break;
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}
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return -1;
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}
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static void snd_soc_rbtree_set_register(struct snd_soc_rbtree_node *rbnode,
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unsigned int idx, unsigned int val)
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{
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switch (rbnode->word_size) {
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case 1: {
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u8 *p = rbnode->block;
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p[idx] = val;
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break;
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}
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case 2: {
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u16 *p = rbnode->block;
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p[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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break;
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}
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}
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static struct snd_soc_rbtree_node *snd_soc_rbtree_lookup(
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struct rb_root *root, unsigned int reg)
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{
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struct rb_node *node;
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struct snd_soc_rbtree_node *rbnode;
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unsigned int base_reg, top_reg;
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node = root->rb_node;
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while (node) {
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rbnode = container_of(node, struct snd_soc_rbtree_node, node);
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snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
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if (reg >= base_reg && reg <= top_reg)
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return rbnode;
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else if (reg > top_reg)
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node = node->rb_right;
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else if (reg < base_reg)
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node = node->rb_left;
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}
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return NULL;
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}
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static int snd_soc_rbtree_insert(struct rb_root *root,
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struct snd_soc_rbtree_node *rbnode)
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{
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struct rb_node **new, *parent;
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struct snd_soc_rbtree_node *rbnode_tmp;
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unsigned int base_reg_tmp, top_reg_tmp;
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unsigned int base_reg;
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parent = NULL;
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new = &root->rb_node;
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while (*new) {
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rbnode_tmp = container_of(*new, struct snd_soc_rbtree_node,
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node);
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/* base and top registers of the current rbnode */
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snd_soc_rbtree_get_base_top_reg(rbnode_tmp, &base_reg_tmp,
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&top_reg_tmp);
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/* base register of the rbnode to be added */
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base_reg = rbnode->base_reg;
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parent = *new;
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/* if this register has already been inserted, just return */
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if (base_reg >= base_reg_tmp &&
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base_reg <= top_reg_tmp)
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return 0;
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else if (base_reg > top_reg_tmp)
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new = &((*new)->rb_right);
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else if (base_reg < base_reg_tmp)
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new = &((*new)->rb_left);
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}
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/* insert the node into the rbtree */
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rb_link_node(&rbnode->node, parent, new);
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rb_insert_color(&rbnode->node, root);
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return 1;
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}
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static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec)
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{
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struct snd_soc_rbtree_ctx *rbtree_ctx;
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struct rb_node *node;
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struct snd_soc_rbtree_node *rbnode;
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unsigned int regtmp;
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unsigned int val, def;
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int ret;
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int i;
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rbtree_ctx = codec->reg_cache;
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for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
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rbnode = rb_entry(node, struct snd_soc_rbtree_node, node);
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for (i = 0; i < rbnode->blklen; ++i) {
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regtmp = rbnode->base_reg + i;
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val = snd_soc_rbtree_get_register(rbnode, i);
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def = snd_soc_get_cache_val(codec->reg_def_copy, i,
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rbnode->word_size);
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if (val == def)
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continue;
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WARN_ON(!snd_soc_codec_writable_register(codec, regtmp));
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codec->cache_bypass = 1;
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ret = snd_soc_write(codec, regtmp, val);
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codec->cache_bypass = 0;
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if (ret)
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return ret;
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dev_dbg(codec->dev, "Synced register %#x, value = %#x\n",
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regtmp, val);
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}
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}
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return 0;
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}
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static int snd_soc_rbtree_insert_to_block(struct snd_soc_rbtree_node *rbnode,
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unsigned int pos, unsigned int reg,
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unsigned int value)
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{
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u8 *blk;
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blk = krealloc(rbnode->block,
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(rbnode->blklen + 1) * rbnode->word_size, GFP_KERNEL);
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if (!blk)
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return -ENOMEM;
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/* insert the register value in the correct place in the rbnode block */
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memmove(blk + (pos + 1) * rbnode->word_size,
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blk + pos * rbnode->word_size,
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(rbnode->blklen - pos) * rbnode->word_size);
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/* update the rbnode block, its size and the base register */
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rbnode->block = blk;
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rbnode->blklen++;
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if (!pos)
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rbnode->base_reg = reg;
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snd_soc_rbtree_set_register(rbnode, pos, value);
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return 0;
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}
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static int snd_soc_rbtree_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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struct snd_soc_rbtree_ctx *rbtree_ctx;
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struct snd_soc_rbtree_node *rbnode, *rbnode_tmp;
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struct rb_node *node;
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unsigned int val;
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unsigned int reg_tmp;
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unsigned int base_reg, top_reg;
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unsigned int pos;
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int i;
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int ret;
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rbtree_ctx = codec->reg_cache;
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/* look up the required register in the cached rbnode */
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rbnode = rbtree_ctx->cached_rbnode;
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if (rbnode) {
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snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
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if (reg >= base_reg && reg <= top_reg) {
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reg_tmp = reg - base_reg;
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val = snd_soc_rbtree_get_register(rbnode, reg_tmp);
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if (val == value)
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return 0;
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snd_soc_rbtree_set_register(rbnode, reg_tmp, value);
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return 0;
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}
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}
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/* if we can't locate it in the cached rbnode we'll have
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* to traverse the rbtree looking for it.
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*/
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rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg);
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if (rbnode) {
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reg_tmp = reg - rbnode->base_reg;
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val = snd_soc_rbtree_get_register(rbnode, reg_tmp);
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if (val == value)
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return 0;
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snd_soc_rbtree_set_register(rbnode, reg_tmp, value);
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rbtree_ctx->cached_rbnode = rbnode;
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} else {
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/* bail out early, no need to create the rbnode yet */
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if (!value)
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return 0;
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/* look for an adjacent register to the one we are about to add */
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for (node = rb_first(&rbtree_ctx->root); node;
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node = rb_next(node)) {
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rbnode_tmp = rb_entry(node, struct snd_soc_rbtree_node, node);
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for (i = 0; i < rbnode_tmp->blklen; ++i) {
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reg_tmp = rbnode_tmp->base_reg + i;
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if (abs(reg_tmp - reg) != 1)
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continue;
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/* decide where in the block to place our register */
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if (reg_tmp + 1 == reg)
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pos = i + 1;
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else
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pos = i;
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ret = snd_soc_rbtree_insert_to_block(rbnode_tmp, pos,
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reg, value);
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if (ret)
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return ret;
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rbtree_ctx->cached_rbnode = rbnode_tmp;
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return 0;
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}
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}
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/* we did not manage to find a place to insert it in an existing
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* block so create a new rbnode with a single register in its block.
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* This block will get populated further if any other adjacent
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* registers get modified in the future.
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*/
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rbnode = kzalloc(sizeof *rbnode, GFP_KERNEL);
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if (!rbnode)
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return -ENOMEM;
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rbnode->blklen = 1;
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rbnode->base_reg = reg;
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rbnode->word_size = codec->driver->reg_word_size;
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rbnode->block = kmalloc(rbnode->blklen * rbnode->word_size,
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GFP_KERNEL);
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if (!rbnode->block) {
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kfree(rbnode);
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return -ENOMEM;
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}
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snd_soc_rbtree_set_register(rbnode, 0, value);
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snd_soc_rbtree_insert(&rbtree_ctx->root, rbnode);
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rbtree_ctx->cached_rbnode = rbnode;
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}
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return 0;
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}
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static int snd_soc_rbtree_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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struct snd_soc_rbtree_ctx *rbtree_ctx;
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struct snd_soc_rbtree_node *rbnode;
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unsigned int base_reg, top_reg;
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unsigned int reg_tmp;
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rbtree_ctx = codec->reg_cache;
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/* look up the required register in the cached rbnode */
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rbnode = rbtree_ctx->cached_rbnode;
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if (rbnode) {
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snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
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if (reg >= base_reg && reg <= top_reg) {
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reg_tmp = reg - base_reg;
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*value = snd_soc_rbtree_get_register(rbnode, reg_tmp);
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return 0;
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}
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}
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/* if we can't locate it in the cached rbnode we'll have
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* to traverse the rbtree looking for it.
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*/
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rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg);
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if (rbnode) {
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reg_tmp = reg - rbnode->base_reg;
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*value = snd_soc_rbtree_get_register(rbnode, reg_tmp);
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rbtree_ctx->cached_rbnode = rbnode;
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} else {
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/* uninitialized registers default to 0 */
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*value = 0;
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}
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return 0;
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}
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static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec)
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{
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struct rb_node *next;
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struct snd_soc_rbtree_ctx *rbtree_ctx;
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struct snd_soc_rbtree_node *rbtree_node;
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/* if we've already been called then just return */
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rbtree_ctx = codec->reg_cache;
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if (!rbtree_ctx)
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return 0;
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/* free up the rbtree */
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next = rb_first(&rbtree_ctx->root);
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while (next) {
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rbtree_node = rb_entry(next, struct snd_soc_rbtree_node, node);
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next = rb_next(&rbtree_node->node);
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rb_erase(&rbtree_node->node, &rbtree_ctx->root);
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kfree(rbtree_node->block);
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kfree(rbtree_node);
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}
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/* release the resources */
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kfree(codec->reg_cache);
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codec->reg_cache = NULL;
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return 0;
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}
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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_ctx *rbtree_ctx;
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unsigned int word_size;
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unsigned int val;
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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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return -ENOMEM;
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rbtree_ctx = codec->reg_cache;
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rbtree_ctx->root = RB_ROOT;
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rbtree_ctx->cached_rbnode = NULL;
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if (!codec->reg_def_copy)
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return 0;
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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,
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word_size);
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if (!val)
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continue;
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ret = snd_soc_rbtree_cache_write(codec, i, val);
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if (ret)
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goto err;
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}
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return 0;
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err:
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snd_soc_cache_exit(codec);
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return ret;
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}
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static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
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{
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int i;
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@ -516,15 +144,6 @@ static const struct snd_soc_cache_ops cache_types[] = {
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.write = snd_soc_flat_cache_write,
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.sync = snd_soc_flat_cache_sync
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},
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{
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.id = SND_SOC_RBTREE_COMPRESSION,
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.name = "rbtree",
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.init = snd_soc_rbtree_cache_init,
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.exit = snd_soc_rbtree_cache_exit,
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.read = snd_soc_rbtree_cache_read,
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.write = snd_soc_rbtree_cache_write,
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.sync = snd_soc_rbtree_cache_sync
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}
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};
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int snd_soc_cache_init(struct snd_soc_codec *codec)
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