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authorJiri Kosina <jkosina@suse.cz>2007-05-14 09:57:40 +0200
committerJiri Kosina <jkosina@suse.cz>2007-10-14 14:47:26 +0200
commit86166b7bcda0bcb53525114fa1c87ac432be478e (patch)
tree1f6afc4c1c1d7a6dd88236f3c11fde61c1885b14 /drivers/hid/hid-core.c
parentefc493f9d5463d933a64a2758fbe6d9bb8300cbb (diff)
HID: add hidraw interface
hidraw is an interface that is going to obsolete hiddev one day. Many userland applications are using libusb instead of using kernel-provided hiddev interface. This is caused by various reasons - the HID parser in kernel doesn't handle all the HID hardware on the planet properly, some devices might require its own specific quirks/drivers, etc. hiddev interface tries to do its best to parse all the received reports properly, and presents only parsed usages into userspace. This is however often not enough, and that's the reason why many userland applications just don't use hiddev at all, and rather use libusb to read raw USB events and process them on their own. Another drawback of hiddev is that it is USB-specific. hidraw interface provides userspace readers with really raw HID reports, no matter what the low-level transport layer is (USB/BT), and gives the userland applications all the freedom to process the HID reports in a way they wish to. Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-core.c')
-rw-r--r--drivers/hid/hid-core.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 317cf8a7b63..2884b036495 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -30,6 +30,7 @@
#include <linux/hid.h>
#include <linux/hiddev.h>
#include <linux/hid-debug.h>
+#include <linux/hidraw.h>
/*
* Version Information
@@ -979,6 +980,8 @@ int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int i
if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
hid->hiddev_report_event(hid, report);
+ if (hid->claimed & HID_CLAIMED_HIDRAW)
+ hidraw_report_event(hid, data, size);
for (n = 0; n < report->maxfield; n++)
hid_input_field(hid, report->field[n], data, interrupt);
@@ -990,5 +993,18 @@ int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int i
}
EXPORT_SYMBOL_GPL(hid_input_report);
+static int __init hid_init(void)
+{
+ return hidraw_init();
+}
+
+static void __exit hid_exit(void)
+{
+ hidraw_exit();
+}
+
+module_init(hid_init);
+module_exit(hid_exit);
+
MODULE_LICENSE(DRIVER_LICENSE);