Greg KH <[email protected]>,
Kay Sievers <[email protected]>,
Vojtech Pavlik <[email protected]>,
Hannes Reinecke <[email protected]>
Subject: [patch 24/28] Input: export input_dev data via sysfs attributes
Content-Disposition: inline; filename=input-dynalloc-attrs.patch
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
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 <[email protected]>
---
drivers/input/input.c | 157 ++++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 134 insertions(+), 23 deletions(-)
Index: work/drivers/input/input.c
===================================================================
--- work.orig/drivers/input/input.c
+++ work/drivers/input/input.c
@@ -308,6 +308,7 @@ static struct input_device_id *input_mat
MATCH_BIT(ledbit, LED_MAX);
MATCH_BIT(sndbit, SND_MAX);
MATCH_BIT(ffbit, FF_MAX);
+ MATCH_BIT(swbit, SW_MAX);
return id;
}
@@ -433,6 +434,23 @@ static void input_call_hotplug(char *ver
#endif
+static int input_print_bitmap(char *buf, unsigned long *bitmap, int max)
+{
+ int i;
+ int len = 0;
+
+ for (i = NBITS(max) - 1; i > 0; i--)
+ if (bitmap[i])
+ break;
+
+ for (; i >= 0; i--)
+ len += sprintf(buf + len, "%lx%s", bitmap[i], i > 0 ? " " : "");
+
+ len += sprintf(buf + len, "\n");
+
+ return len;
+}
+
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_bus_input_dir;
@@ -454,20 +472,17 @@ static unsigned int input_devices_poll(s
return 0;
}
-#define SPRINTF_BIT_B(bit, name, max) \
- do { \
- len += sprintf(buf + len, "B: %s", name); \
- for (i = NBITS(max) - 1; i >= 0; i--) \
- if (dev->bit[i]) break; \
- for (; i >= 0; i--) \
- len += sprintf(buf + len, "%lx ", dev->bit[i]); \
- len += sprintf(buf + len, "\n"); \
+#define SPRINTF_BIT_B(ev, bm) \
+ do { \
+ len += sprintf(buf + len, "B: %s=", #ev); \
+ len += input_print_bitmap(buf + len, \
+ dev->bm##bit, ev##_MAX); \
} while (0)
-#define SPRINTF_BIT_B2(bit, name, max, ev) \
- do { \
- if (test_bit(ev, dev->evbit)) \
- SPRINTF_BIT_B(bit, name, max); \
+#define SPRINTF_BIT_B2(ev, bm) \
+ do { \
+ if (test_bit(EV_##ev, dev->evbit)) \
+ SPRINTF_BIT_B(ev, bm); \
} while (0)
static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
@@ -477,7 +492,7 @@ static int input_devices_read(char *buf,
const char *path;
off_t at = 0;
- int i, len, cnt = 0;
+ int len, cnt = 0;
list_for_each_entry(dev, &input_dev_list, node) {
@@ -496,15 +511,15 @@ static int input_devices_read(char *buf,
len += sprintf(buf + len, "\n");
- SPRINTF_BIT_B(evbit, "EV=", EV_MAX);
- SPRINTF_BIT_B2(keybit, "KEY=", KEY_MAX, EV_KEY);
- SPRINTF_BIT_B2(relbit, "REL=", REL_MAX, EV_REL);
- SPRINTF_BIT_B2(absbit, "ABS=", ABS_MAX, EV_ABS);
- SPRINTF_BIT_B2(mscbit, "MSC=", MSC_MAX, EV_MSC);
- SPRINTF_BIT_B2(ledbit, "LED=", LED_MAX, EV_LED);
- SPRINTF_BIT_B2(sndbit, "SND=", SND_MAX, EV_SND);
- SPRINTF_BIT_B2(ffbit, "FF=", FF_MAX, EV_FF);
- SPRINTF_BIT_B2(swbit, "SW=", SW_MAX, EV_SW);
+ SPRINTF_BIT_B(EV, ev);
+ SPRINTF_BIT_B2(KEY, key);
+ SPRINTF_BIT_B2(REL, rel);
+ SPRINTF_BIT_B2(ABS, abs);
+ SPRINTF_BIT_B2(MSC, msc);
+ SPRINTF_BIT_B2(LED, led);
+ SPRINTF_BIT_B2(SND, snd);
+ SPRINTF_BIT_B2(FF, ff);
+ SPRINTF_BIT_B2(SW, sw);
len += sprintf(buf + len, "\n");
@@ -611,6 +626,96 @@ static inline int input_proc_init(void)
static inline void input_proc_exit(void) { }
#endif
+#define INPUT_DEV_STRING_ATTR_SHOW(name) \
+static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
+{ \
+ struct input_dev *input_dev = to_input_dev(dev); \
+ int retval; \
+ \
+ retval = down_interruptible(&input_dev->sem); \
+ if (retval) \
+ return retval; \
+ \
+ retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \
+ \
+ up(&input_dev->sem); \
+ \
+ return retval; \
+}
+
+INPUT_DEV_STRING_ATTR_SHOW(name);
+INPUT_DEV_STRING_ATTR_SHOW(phys);
+INPUT_DEV_STRING_ATTR_SHOW(uniq);
+
+static struct class_device_attribute input_dev_attrs[] = {
+ __ATTR(name, S_IRUGO, input_dev_show_name, NULL),
+ __ATTR(phys, S_IRUGO, input_dev_show_phys, NULL),
+ __ATTR(uniq, S_IRUGO, input_dev_show_uniq, NULL),
+ __ATTR_NULL
+};
+
+#define INPUT_DEV_ID_ATTR(name) \
+static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
+{ \
+ struct input_dev *input_dev = to_input_dev(dev); \
+ return sprintf(buf, "%04x\n", input_dev->id.name); \
+} \
+static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
+
+INPUT_DEV_ID_ATTR(bustype);
+INPUT_DEV_ID_ATTR(vendor);
+INPUT_DEV_ID_ATTR(product);
+INPUT_DEV_ID_ATTR(version);
+
+static struct attribute *input_dev_id_attrs[] = {
+ &class_device_attr_bustype.attr,
+ &class_device_attr_vendor.attr,
+ &class_device_attr_product.attr,
+ &class_device_attr_version.attr,
+ NULL
+};
+
+static struct attribute_group input_dev_id_attr_group = {
+ .name = "id",
+ .attrs = input_dev_id_attrs,
+};
+
+#define INPUT_DEV_CAP_ATTR(ev, bm) \
+static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
+{ \
+ struct input_dev *input_dev = to_input_dev(dev); \
+ return input_print_bitmap(buf, input_dev->bm##bit, ev##_MAX); \
+} \
+static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
+
+INPUT_DEV_CAP_ATTR(EV, ev);
+INPUT_DEV_CAP_ATTR(KEY, key);
+INPUT_DEV_CAP_ATTR(REL, rel);
+INPUT_DEV_CAP_ATTR(ABS, abs);
+INPUT_DEV_CAP_ATTR(MSC, msc);
+INPUT_DEV_CAP_ATTR(LED, led);
+INPUT_DEV_CAP_ATTR(SND, snd);
+INPUT_DEV_CAP_ATTR(FF, ff);
+INPUT_DEV_CAP_ATTR(SW, sw);
+
+static struct attribute *input_dev_caps_attrs[] = {
+ &class_device_attr_ev.attr,
+ &class_device_attr_key.attr,
+ &class_device_attr_rel.attr,
+ &class_device_attr_abs.attr,
+ &class_device_attr_msc.attr,
+ &class_device_attr_led.attr,
+ &class_device_attr_snd.attr,
+ &class_device_attr_ff.attr,
+ &class_device_attr_sw.attr,
+ NULL
+};
+
+static struct attribute_group input_dev_caps_attr_group = {
+ .name = "capabilities",
+ .attrs = input_dev_caps_attrs,
+};
+
static void input_dev_release(struct class_device *class_dev)
{
struct input_dev *dev = to_input_dev(class_dev);
@@ -622,6 +727,7 @@ static void input_dev_release(struct cla
static struct class input_dev_class = {
.name = "input_dev",
.release = input_dev_release,
+ .class_dev_attrs = input_dev_attrs,
};
struct input_dev *input_allocate_device(void)
@@ -659,6 +765,8 @@ static void input_register_classdevice(s
kfree(path);
class_device_add(&dev->cdev);
+ sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
+ sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
}
void input_register_device(struct input_dev *dev)
@@ -725,8 +833,11 @@ void input_unregister_device(struct inpu
list_del_init(&dev->node);
- if (dev->dynalloc)
+ if (dev->dynalloc) {
+ sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
+ sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
class_device_unregister(&dev->cdev);
+ }
input_wakeup_procfs_readers();
}
-
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