HID: move samsung quirks

[firefly-linux-kernel-4.4.55.git] / drivers / hid / hid-samsung.c

diff --git a/drivers/hid/hid-samsung.c b/drivers/hid/hid-samsung.c
new file mode 100644 (file)
index 0000000..8771bfa
--- /dev/null
+++ b/drivers/hid/hid-samsung.c
@@ -0,0 +1,101 @@
+/*
+ *  HID driver for some samsung "special" devices
+ *
+ *  Copyright (c) 1999 Andreas Gal
+ *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ *  Copyright (c) 2006-2007 Jiri Kosina
+ *  Copyright (c) 2007 Paul Walmsley
+ *  Copyright (c) 2008 Jiri Slaby
+ */
+
+/*
+ * 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"
+
+/*
+ * Samsung IrDA remote controller (reports as Cypress USB Mouse).
+ *
+ * Vendor specific report #4 has a size of 48 bit,
+ * and therefore is not accepted when inspecting the descriptors.
+ * As a workaround we reinterpret the report as:
+ *   Variable type, count 6, size 8 bit, log. maximum 255
+ * The burden to reconstruct the data is moved into user space.
+ */
+static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+               unsigned int rsize)
+{
+       if (rsize >= 182 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
+                       rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
+                       rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
+                       rdesc[182] == 0x40) {
+               dev_info(&hdev->dev, "fixing up Samsung IrDA report "
+                               "descriptor\n");
+               rdesc[176] = 0xff;
+               rdesc[178] = 0x08;
+               rdesc[180] = 0x06;
+               rdesc[182] = 0x42;
+       }
+}
+
+static int samsung_probe(struct hid_device *hdev,
+               const struct hid_device_id *id)
+{
+       int ret;
+
+       hdev->quirks |= HID_QUIRK_HIDDEV | HID_QUIRK_IGNORE_HIDINPUT;
+
+       ret = hid_parse(hdev);
+       if (ret) {
+               dev_err(&hdev->dev, "parse failed\n");
+               goto err_free;
+       }
+
+       ret = hid_hw_start(hdev);
+       if (ret) {
+               dev_err(&hdev->dev, "hw start failed\n");
+               goto err_free;
+       }
+
+       return 0;
+err_free:
+       return ret;
+}
+
+static const struct hid_device_id samsung_devices[] = {
+       { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
+       { }
+};
+MODULE_DEVICE_TABLE(hid, samsung_devices);
+
+static struct hid_driver samsung_driver = {
+       .name = "samsung",
+       .id_table = samsung_devices,
+       .report_fixup = samsung_report_fixup,
+       .probe = samsung_probe,
+};
+
+static int samsung_init(void)
+{
+       return hid_register_driver(&samsung_driver);
+}
+
+static void samsung_exit(void)
+{
+       hid_unregister_driver(&samsung_driver);
+}
+
+module_init(samsung_init);
+module_exit(samsung_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(samsung);