i.e. echo 6 59 >/sys/kernel/debug/soc-audio.0/codec_reg will set register 0x06 to a value of 0x59. Also, pop_time debugfs interface setup is moved so that it is setup in the same function as codec_reg

Signed-off-by: Troy Kisky troy.kisky@boundarydevices.com

diff --git a/include/sound/soc.h b/include/sound/soc.h index a1e0357..d33825d 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -425,6 +425,7 @@ struct snd_soc_codec { short reg_cache_step;

/* dapm */ + u32 pop_time; struct list_head dapm_widgets; struct list_head dapm_paths; enum snd_soc_bias_level bias_level; @@ -516,6 +517,9 @@ struct snd_soc_device { struct delayed_work delayed_work; struct work_struct deferred_resume_work; void *codec_data; +#ifdef CONFIG_DEBUG_FS + struct dentry *debugfs_root; +#endif };

/* runtime channel data */ diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index ad38113..db720b1 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -27,6 +27,7 @@ #include <linux/delay.h> #include <linux/pm.h> #include <linux/bitops.h> +#include <linux/debugfs.h> #include <linux/platform_device.h> #include <sound/core.h> #include <sound/pcm.h> @@ -962,10 +963,8 @@ static int soc_new_pcm(struct snd_soc_device *socdev, }

/* codec register dump */ -static ssize_t codec_reg_show(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t soc_codec_reg_show(struct snd_soc_device *devdata, char *buf) { - struct snd_soc_device *devdata = dev_get_drvdata(dev); struct snd_soc_codec *codec = devdata->codec; int i, step = 1, count = 0;

@@ -1002,8 +1001,117 @@ static ssize_t codec_reg_show(struct device *dev,

return count; } +static ssize_t codec_reg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_device *devdata = dev_get_drvdata(dev); + return soc_codec_reg_show(devdata, buf); +} + static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);

+#ifdef CONFIG_DEBUG_FS +static int codec_reg_open_file(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +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_device *devdata = file->private_data; + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + ret = soc_codec_reg_show(devdata, buf); + if (ret >= 0) + ret = simple_read_from_buffer(user_buf, count, ppos, buf, 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]; + int buf_size; + char *start = buf; + unsigned long reg, value; + int step = 1; + struct snd_soc_device *devdata = file->private_data; + struct snd_soc_codec *codec = devdata->codec; + + buf_size = min(count, (sizeof(buf)-1)); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + buf[buf_size] = 0; + + if (codec->reg_cache_step) + step = codec->reg_cache_step; + + while (*start == ' ') + start++; + reg = simple_strtoul(start, &start, 16); + if ((reg >= codec->reg_cache_size) || (reg % step)) + return -EINVAL; + while (*start == ' ') + start++; + if (strict_strtoul(start, 16, &value)) + return -EINVAL; + codec->write(codec, reg, value); + return buf_size; +} + +static const struct file_operations codec_reg_fops = { + .open = codec_reg_open_file, + .read = codec_reg_read_file, + .write = codec_reg_write_file, +}; + +static void soc_init_debugfs(struct snd_soc_device *socdev) +{ + struct dentry *root, *file; + struct snd_soc_codec *codec = socdev->codec; + root = debugfs_create_dir(dev_name(socdev->dev), NULL); + if (IS_ERR(root) || !root) + goto exit1; + + file = debugfs_create_file("codec_reg", 0644, + root, socdev, &codec_reg_fops); + if (!file) + goto exit2; + + file = debugfs_create_u32("dapm_pop_time", 0744, + root, &codec->pop_time); + if (!file) + goto exit2; + socdev->debugfs_root = root; + return; +exit2: + debugfs_remove_recursive(root); +exit1: + dev_err(socdev->dev, "debugfs is not available\n"); +} + +static void soc_cleanup_debugfs(struct snd_soc_device *socdev) +{ + debugfs_remove_recursive(socdev->debugfs_root); + socdev->debugfs_root = NULL; +} + +#else + +static inline void soc_init_debugfs(struct snd_soc_device *socdev) +{ +} + +static inline void soc_cleanup_debugfs(struct snd_soc_device *socdev) +{ +} +#endif + /** * snd_soc_new_ac97_codec - initailise AC97 device * @codec: audio codec @@ -1217,6 +1325,7 @@ int snd_soc_register_card(struct snd_soc_device *socdev) if (err < 0) printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");

+ soc_init_debugfs(socdev); mutex_unlock(&codec->mutex);

out: @@ -1240,6 +1349,7 @@ void snd_soc_free_pcms(struct snd_soc_device *socdev) #endif

mutex_lock(&codec->mutex); + soc_cleanup_debugfs(socdev); #ifdef CONFIG_SND_SOC_AC97_BUS for (i = 0; i < codec->num_dai; i++) { codec_dai = &codec->dai[i]; diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 9ca9c08..1bd88ac 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -38,7 +38,6 @@ #include <linux/bitops.h> #include <linux/platform_device.h> #include <linux/jiffies.h> -#include <linux/debugfs.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -68,17 +67,13 @@ static int dapm_status = 1; module_param(dapm_status, int, 0); MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");

-static struct dentry *asoc_debugfs; - -static u32 pop_time; - -static void pop_wait(void) +static void pop_wait(u32 pop_time) { if (pop_time) schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); }

-static void pop_dbg(const char *fmt, ...) +static void pop_dbg(u32 pop_time, const char *fmt, ...) { va_list args;

@@ -86,7 +81,7 @@ static void pop_dbg(const char *fmt, ...)

if (pop_time) { vprintk(fmt, args); - pop_wait(); + pop_wait(pop_time); }

va_end(args); @@ -231,10 +226,11 @@ static int dapm_update_bits(struct snd_soc_dapm_widget *widget)

change = old != new; if (change) { - pop_dbg("pop test %s : %s in %d ms\n", widget->name, - widget->power ? "on" : "off", pop_time); + pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n", + widget->name, widget->power ? "on" : "off", + codec->pop_time); snd_soc_write(codec, widget->reg, new); - pop_wait(); + pop_wait(codec->pop_time); } pr_debug("reg %x old %x new %x change %d\n", widget->reg, old, new, change); @@ -822,23 +818,9 @@ static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);

int snd_soc_dapm_sys_add(struct device *dev) { - int ret = 0; - if (!dapm_status) return 0; - - ret = device_create_file(dev, &dev_attr_dapm_widget); - if (ret != 0) - return ret; - - asoc_debugfs = debugfs_create_dir("asoc", NULL); - if (!IS_ERR(asoc_debugfs)) - debugfs_create_u32("dapm_pop_time", 0744, asoc_debugfs, - &pop_time); - else - asoc_debugfs = NULL; - - return 0; + return device_create_file(dev, &dev_attr_dapm_widget); }

static void snd_soc_dapm_sys_remove(struct device *dev) @@ -846,9 +828,6 @@ static void snd_soc_dapm_sys_remove(struct device *dev) if (dapm_status) { device_remove_file(dev, &dev_attr_dapm_widget); } - - if (asoc_debugfs) - debugfs_remove_recursive(asoc_debugfs); }

/* free all dapm widgets and resources */