Adding 4 more debugfs nodes, users could get more information about the jack_kctl from them: - kctl_id, read-only, get jack_kctl->kctl's id sound-core/card0/HeadphoneJack# cat kctl_id Headphone Jack
- mask_bits, read-only, get jack_kctl's events mask_bits sound-core/card0/HeadphoneJack# cat mask_bits 0x0001 HEADPHONE(0x0001)
- status, read-only, get jack_kctl's current status headphone unplugged: sound-core/card0/HeadphoneJack# cat status 0x0000 headphone plugged: sound-core/card0/HeadphoneJack# cat status 0x0001 HEADPHONE(0x0001)
- type, read-only, get jack's supported events type sound-core/card0/HeadphoneJack# cat type 0x0001 HEADPHONE(0x0001)
Signed-off-by: Hui Wang hui.wang@canonical.com --- sound/core/jack.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+)
diff --git a/sound/core/jack.c b/sound/core/jack.c index 62e9215fa0f0..31c80883db2c 100644 --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -229,6 +229,119 @@ static ssize_t jackin_inject_write(struct file *file, return ret; }
+static ssize_t jack_kctl_id_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = scnprintf(buf, PAGE_SIZE, "%s\n", jack_kctl->kctl->id.name); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kfree(buf); + return ret; +} + +/* the bit definition is aligned with snd_jack_types in jack.h */ +static const char * const jack_events_name[] = { + "HEADPHONE(0x0001)", "MICROPHONE(0x0002)", "LINEOUT(0x0004)", + "MECHANICAL(0x0008)", "VIDEOOUT(0x0010)", "LINEIN(0x0020)", + "", "", "", "BTN_5(0x0200)", "BTN_4(0x0400)", "BTN_3(0x0800)", + "BTN_2(0x1000)", "BTN_1(0x2000)", "BTN_0(0x4000)", "", +}; + +static int parse_mask_bits(unsigned int mask_bits, char *s) +{ + char *buf; + int len, i; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = scnprintf(buf, PAGE_SIZE, "0x%04x", mask_bits); + + for (i = 0; i < 16; i++) + if (mask_bits & (1 << i)) + len += scnprintf(buf + strlen(buf), PAGE_SIZE - strlen(buf), + " %s", jack_events_name[i]); + + len += scnprintf(buf + strlen(buf), PAGE_SIZE - strlen(buf), "\n"); + + strcpy(s, buf); + + kfree(buf); + + return len; +} + +static ssize_t jack_kctl_mask_bits_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->mask_bits, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kfree(buf); + return ret; +} + +static ssize_t jack_kctl_status_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->kctl->private_value, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kfree(buf); + return ret; +} + +#ifdef CONFIG_SND_JACK_INPUT_DEV +static ssize_t jack_type_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->jack->type, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kfree(buf); + return ret; +} + +static const struct file_operations jack_type_fops = { + .open = simple_open, + .read = jack_type_read, + .llseek = default_llseek, +}; +#endif + static const struct file_operations sw_inject_enable_fops = { .open = simple_open, .read = sw_inject_enable_read, @@ -242,6 +355,24 @@ static const struct file_operations jackin_inject_fops = { .llseek = default_llseek, };
+static const struct file_operations jack_kctl_id_fops = { + .open = simple_open, + .read = jack_kctl_id_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_mask_bits_fops = { + .open = simple_open, + .read = jack_kctl_mask_bits_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_status_fops = { + .open = simple_open, + .read = jack_kctl_status_read, + .llseek = default_llseek, +}; + /* The substrings in the jack's name but not suitable for folder's name */ static const char * const dropped_chars[] = { "/", "=", ",", " ", @@ -281,6 +412,19 @@ static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, debugfs_create_file("jackin_inject", 0200, jack_kctl->jack_debugfs_root, jack_kctl, &jackin_inject_fops);
+ debugfs_create_file("kctl_id", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_id_fops); + + debugfs_create_file("mask_bits", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_mask_bits_fops); + + debugfs_create_file("status", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_status_fops); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + debugfs_create_file("type", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_type_fops); +#endif return 0; } #else /* CONFIG_DEBUG_FS */