HID: add support for Keytouch IEC 60945

The keyboard has several bugs in its report descriptor, most
importantly the Logical Min/Max are completely off.

Replace it with simplified descriptor which describes it properly.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/hid/hid-keytouch.c b/drivers/hid/hid-keytouch.c
new file mode 100644
index 000000000000..07cd825f6f01
--- /dev/null
+++ b/drivers/hid/hid-keytouch.c
@@ -0,0 +1,66 @@
+/*
+ *  HID driver for Keytouch devices not fully compliant with HID standard
+ *
+ *  Copyright (c) 2011 Jiri Kosina
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+/* Replace the broken report descriptor of this device with rather
+ * a default one */
+static __u8 keytouch_fixed_rdesc[] = {
+0x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
+0x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
+0x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
+0x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
+0x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
+};
+
+static __u8 *keytouch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+                unsigned int *rsize)
+{
+        hid_info(hdev, "fixing up Keytouch IEC report descriptor\n");
+
+        rdesc = keytouch_fixed_rdesc;
+        *rsize = sizeof(keytouch_fixed_rdesc);
+
+        return rdesc;
+}
+
+static const struct hid_device_id keytouch_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, keytouch_devices);
+
+static struct hid_driver keytouch_driver = {
+        .name = "keytouch",
+        .id_table = keytouch_devices,
+        .report_fixup = keytouch_report_fixup,
+};
+
+static int __init keytouch_init(void)
+{
+        return hid_register_driver(&keytouch_driver);
+}
+
+static void __exit keytouch_exit(void)
+{
+        hid_unregister_driver(&keytouch_driver);
+}
+
+module_init(keytouch_init);
+module_exit(keytouch_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jiri Kosina");