[PATCH] Input: export input_dev data via sysfs attributes
Input: export various input device attributes via sysfs
The following structure is exported:
input0/
|-- name
|-- phys
|-- uniq
|-- id/{bustype|vendor|product|version}
`-- capabilities/{ev|abs|rel|key|led|msc|ff|sw}
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dmitry Torokhov
Greg Kroah-Hartman
Родитель
051b2feaa4
Коммит
5c1e9a6a6a
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@ -434,6 +434,23 @@ static void input_call_hotplug(char *verb, struct input_dev *dev)
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#endif
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static int input_print_bitmap(char *buf, unsigned long *bitmap, int max)
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{
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int i;
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int len = 0;
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for (i = NBITS(max) - 1; i > 0; i--)
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if (bitmap[i])
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break;
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for (; i >= 0; i--)
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len += sprintf(buf + len, "%lx%s", bitmap[i], i > 0 ? " " : "");
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len += sprintf(buf + len, "\n");
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return len;
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}
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#ifdef CONFIG_PROC_FS
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static struct proc_dir_entry *proc_bus_input_dir;
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@ -455,20 +472,17 @@ static unsigned int input_devices_poll(struct file *file, poll_table *wait)
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return 0;
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}
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#define SPRINTF_BIT_B(bit, name, max) \
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do { \
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len += sprintf(buf + len, "B: %s", name); \
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for (i = NBITS(max) - 1; i >= 0; i--) \
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if (dev->bit[i]) break; \
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for (; i >= 0; i--) \
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len += sprintf(buf + len, "%lx ", dev->bit[i]); \
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len += sprintf(buf + len, "\n"); \
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#define SPRINTF_BIT_B(ev, bm) \
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do { \
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len += sprintf(buf + len, "B: %s=", #ev); \
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len += input_print_bitmap(buf + len, \
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dev->bm##bit, ev##_MAX); \
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} while (0)
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#define SPRINTF_BIT_B2(bit, name, max, ev) \
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do { \
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if (test_bit(ev, dev->evbit)) \
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SPRINTF_BIT_B(bit, name, max); \
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#define SPRINTF_BIT_B2(ev, bm) \
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do { \
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if (test_bit(EV_##ev, dev->evbit)) \
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SPRINTF_BIT_B(ev, bm); \
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} while (0)
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static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
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@ -478,7 +492,7 @@ static int input_devices_read(char *buf, char **start, off_t pos, int count, int
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const char *path;
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off_t at = 0;
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int i, len, cnt = 0;
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int len, cnt = 0;
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list_for_each_entry(dev, &input_dev_list, node) {
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@ -497,15 +511,15 @@ static int input_devices_read(char *buf, char **start, off_t pos, int count, int
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len += sprintf(buf + len, "\n");
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SPRINTF_BIT_B(evbit, "EV=", EV_MAX);
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SPRINTF_BIT_B2(keybit, "KEY=", KEY_MAX, EV_KEY);
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SPRINTF_BIT_B2(relbit, "REL=", REL_MAX, EV_REL);
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SPRINTF_BIT_B2(absbit, "ABS=", ABS_MAX, EV_ABS);
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SPRINTF_BIT_B2(mscbit, "MSC=", MSC_MAX, EV_MSC);
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SPRINTF_BIT_B2(ledbit, "LED=", LED_MAX, EV_LED);
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SPRINTF_BIT_B2(sndbit, "SND=", SND_MAX, EV_SND);
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SPRINTF_BIT_B2(ffbit, "FF=", FF_MAX, EV_FF);
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SPRINTF_BIT_B2(swbit, "SW=", SW_MAX, EV_SW);
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SPRINTF_BIT_B(EV, ev);
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SPRINTF_BIT_B2(KEY, key);
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SPRINTF_BIT_B2(REL, rel);
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SPRINTF_BIT_B2(ABS, abs);
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SPRINTF_BIT_B2(MSC, msc);
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SPRINTF_BIT_B2(LED, led);
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SPRINTF_BIT_B2(SND, snd);
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SPRINTF_BIT_B2(FF, ff);
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SPRINTF_BIT_B2(SW, sw);
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len += sprintf(buf + len, "\n");
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@ -612,6 +626,96 @@ static inline int input_proc_init(void) { return 0; }
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static inline void input_proc_exit(void) { }
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#endif
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#define INPUT_DEV_STRING_ATTR_SHOW(name) \
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static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
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{ \
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struct input_dev *input_dev = to_input_dev(dev); \
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int retval; \
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\
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retval = down_interruptible(&input_dev->sem); \
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if (retval) \
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return retval; \
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\
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retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \
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\
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up(&input_dev->sem); \
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\
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return retval; \
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}
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INPUT_DEV_STRING_ATTR_SHOW(name);
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INPUT_DEV_STRING_ATTR_SHOW(phys);
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INPUT_DEV_STRING_ATTR_SHOW(uniq);
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static struct class_device_attribute input_dev_attrs[] = {
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__ATTR(name, S_IRUGO, input_dev_show_name, NULL),
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__ATTR(phys, S_IRUGO, input_dev_show_phys, NULL),
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__ATTR(uniq, S_IRUGO, input_dev_show_uniq, NULL),
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__ATTR_NULL
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};
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#define INPUT_DEV_ID_ATTR(name) \
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static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
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{ \
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struct input_dev *input_dev = to_input_dev(dev); \
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return sprintf(buf, "%04x\n", input_dev->id.name); \
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} \
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static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
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INPUT_DEV_ID_ATTR(bustype);
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INPUT_DEV_ID_ATTR(vendor);
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INPUT_DEV_ID_ATTR(product);
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INPUT_DEV_ID_ATTR(version);
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static struct attribute *input_dev_id_attrs[] = {
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&class_device_attr_bustype.attr,
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&class_device_attr_vendor.attr,
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&class_device_attr_product.attr,
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&class_device_attr_version.attr,
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NULL
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};
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static struct attribute_group input_dev_id_attr_group = {
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.name = "id",
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.attrs = input_dev_id_attrs,
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};
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#define INPUT_DEV_CAP_ATTR(ev, bm) \
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static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
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{ \
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struct input_dev *input_dev = to_input_dev(dev); \
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return input_print_bitmap(buf, input_dev->bm##bit, ev##_MAX); \
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} \
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static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
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INPUT_DEV_CAP_ATTR(EV, ev);
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INPUT_DEV_CAP_ATTR(KEY, key);
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INPUT_DEV_CAP_ATTR(REL, rel);
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INPUT_DEV_CAP_ATTR(ABS, abs);
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INPUT_DEV_CAP_ATTR(MSC, msc);
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INPUT_DEV_CAP_ATTR(LED, led);
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INPUT_DEV_CAP_ATTR(SND, snd);
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INPUT_DEV_CAP_ATTR(FF, ff);
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INPUT_DEV_CAP_ATTR(SW, sw);
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static struct attribute *input_dev_caps_attrs[] = {
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&class_device_attr_ev.attr,
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&class_device_attr_key.attr,
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&class_device_attr_rel.attr,
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&class_device_attr_abs.attr,
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&class_device_attr_msc.attr,
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&class_device_attr_led.attr,
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&class_device_attr_snd.attr,
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&class_device_attr_ff.attr,
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&class_device_attr_sw.attr,
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NULL
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};
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static struct attribute_group input_dev_caps_attr_group = {
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.name = "capabilities",
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.attrs = input_dev_caps_attrs,
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};
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static void input_dev_release(struct class_device *class_dev)
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{
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struct input_dev *dev = to_input_dev(class_dev);
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@ -623,6 +727,7 @@ static void input_dev_release(struct class_device *class_dev)
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static struct class input_dev_class = {
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.name = "input_dev",
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.release = input_dev_release,
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.class_dev_attrs = input_dev_attrs,
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};
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struct input_dev *input_allocate_device(void)
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@ -660,6 +765,8 @@ static void input_register_classdevice(struct input_dev *dev)
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kfree(path);
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class_device_add(&dev->cdev);
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sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
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sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
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}
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void input_register_device(struct input_dev *dev)
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@ -726,8 +833,11 @@ void input_unregister_device(struct input_dev *dev)
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list_del_init(&dev->node);
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if (dev->dynalloc)
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if (dev->dynalloc) {
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sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
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sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
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class_device_unregister(&dev->cdev);
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}
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input_wakeup_procfs_readers();
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}
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