NULL, /* terminator */
};
-/* returns the minimum number of bytes needed to represent
- * a particular given value */
-static int min_bytes_needed(unsigned long val)
-{
- int c = 0;
- int i;
-
- for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
- if (val & (1UL << i))
- break;
- c = (sizeof val * 8) - c;
- if (!c || (c % 8))
- c = (c + 8) / 8;
- else
- c /= 8;
- return c;
-}
-
-/* fill buf which is 'len' bytes with a formatted
- * string of the form 'reg: value\n' */
-static int format_register_str(struct snd_soc_codec *codec,
- unsigned int reg, char *buf, size_t len)
-{
- int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
- int regsize = codec->driver->reg_word_size * 2;
- int ret;
-
- /* +2 for ': ' and + 1 for '\n' */
- if (wordsize + regsize + 2 + 1 != len)
- return -EINVAL;
-
- sprintf(buf, "%.*x: ", wordsize, reg);
- buf += wordsize + 2;
-
- ret = snd_soc_read(codec, reg);
- if (ret < 0)
- memset(buf, 'X', regsize);
- else
- sprintf(buf, "%.*x", regsize, ret);
- buf[regsize] = '\n';
- /* no NUL-termination needed */
- return 0;
-}
-
-/* codec register dump */
-static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
- size_t count, loff_t pos)
-{
- int i, step = 1;
- int wordsize, regsize;
- int len;
- size_t total = 0;
- loff_t p = 0;
-
- wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
- regsize = codec->driver->reg_word_size * 2;
-
- len = wordsize + regsize + 2 + 1;
-
- if (!codec->driver->reg_cache_size)
- return 0;
-
- if (codec->driver->reg_cache_step)
- step = codec->driver->reg_cache_step;
-
- for (i = 0; i < codec->driver->reg_cache_size; i += step) {
- /* only support larger than PAGE_SIZE bytes debugfs
- * entries for the default case */
- if (p >= pos) {
- if (total + len >= count - 1)
- break;
- format_register_str(codec, i, buf + total, len);
- total += len;
- }
- p += len;
- }
-
- total = min(total, count - 1);
-
- return total;
-}
-
-static ssize_t codec_reg_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
-
- return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
-}
-
-static DEVICE_ATTR_RO(codec_reg);
-
static ssize_t pmdown_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
static struct attribute *soc_dev_attrs[] = {
- &dev_attr_codec_reg.attr,
&dev_attr_pmdown_time.attr,
NULL
};
};
#ifdef CONFIG_DEBUG_FS
-static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- struct snd_soc_codec *codec = file->private_data;
- char *buf;
-
- if (*ppos < 0 || !count)
- return -EINVAL;
-
- buf = kmalloc(count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- ret = soc_codec_reg_show(codec, buf, count, *ppos);
- if (ret >= 0) {
- if (copy_to_user(user_buf, buf, ret)) {
- kfree(buf);
- return -EFAULT;
- }
- *ppos += ret;
- }
-
- kfree(buf);
- return ret;
-}
-
-static ssize_t codec_reg_write_file(struct file *file,
- const char __user *user_buf, size_t count, loff_t *ppos)
-{
- char buf[32];
- size_t buf_size;
- char *start = buf;
- unsigned long reg, value;
- struct snd_soc_codec *codec = file->private_data;
- int ret;
-
- buf_size = min(count, (sizeof(buf)-1));
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = 0;
-
- while (*start == ' ')
- start++;
- reg = simple_strtoul(start, &start, 16);
- while (*start == ' ')
- start++;
- ret = kstrtoul(start, 16, &value);
- if (ret)
- return ret;
-
- /* Userspace has been fiddling around behind the kernel's back */
- add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
-
- snd_soc_write(codec, reg, value);
- return buf_size;
-}
-
-static const struct file_operations codec_reg_fops = {
- .open = simple_open,
- .read = codec_reg_read_file,
- .write = codec_reg_write_file,
- .llseek = default_llseek,
-};
-
static void soc_init_component_debugfs(struct snd_soc_component *component)
{
if (!component->card->debugfs_card_root)
snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
component->debugfs_root);
-
- if (component->init_debugfs)
- component->init_debugfs(component);
}
static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
debugfs_remove_recursive(component->debugfs_root);
}
-static void soc_init_codec_debugfs(struct snd_soc_component *component)
-{
- struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
- struct dentry *debugfs_reg;
-
- debugfs_reg = debugfs_create_file("codec_reg", 0644,
- codec->component.debugfs_root,
- codec, &codec_reg_fops);
- if (!debugfs_reg)
- dev_warn(codec->dev,
- "ASoC: Failed to create codec register debugfs file\n");
-}
-
static int codec_list_show(struct seq_file *m, void *v)
{
struct snd_soc_codec *codec;
#else
-#define soc_init_codec_debugfs NULL
-
static inline void soc_init_component_debugfs(
struct snd_soc_component *component)
{
}
}
-static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
-{
- int ret;
-
- if (codec->cache_init)
- return 0;
-
- ret = snd_soc_cache_init(codec);
- if (ret < 0) {
- dev_err(codec->dev,
- "ASoC: Failed to set cache compression type: %d\n",
- ret);
- return ret;
- }
- codec->cache_init = 1;
- return 0;
-}
-
/**
* snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
* @rtd: The runtime for which the DAI link format should be changed
static int snd_soc_instantiate_card(struct snd_soc_card *card)
{
- struct snd_soc_codec *codec;
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai_link *dai_link;
int ret, i, order;
for (i = 0; i < card->num_links; i++)
snd_soc_add_dai_link(card, card->dai_link+i);
- /* initialize the register cache for each available codec */
- list_for_each_entry(codec, &codec_list, list) {
- if (codec->cache_init)
- continue;
- ret = snd_soc_init_codec_cache(codec);
- if (ret < 0)
- goto base_error;
- }
-
/* card bind complete so register a sound card */
ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
card->owner, 0, &card->snd_card);
dapm->set_bias_level = snd_soc_codec_set_bias_level;
codec->dev = dev;
codec->driver = codec_drv;
- codec->component.val_bytes = codec_drv->reg_word_size;
#ifdef CONFIG_DEBUG_FS
- codec->component.init_debugfs = soc_init_codec_debugfs;
codec->component.debugfs_prefix = "codec";
#endif
codec->component.name);
snd_soc_component_cleanup(&codec->component);
- snd_soc_cache_exit(codec);
kfree(codec);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
projects / platform / kernel / linux-starfive.git / commitdiff