drivers/hid/hid-sunplus.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for some sunplus "special" devices
0004  *
0005  *  Copyright (c) 1999 Andreas Gal
0006  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
0007  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
0008  *  Copyright (c) 2006-2007 Jiri Kosina
0009  *  Copyright (c) 2008 Jiri Slaby
0010  */
0011
0012 /*
0013  */
0014
0015 #include <linux/device.h>
0016 #include <linux/hid.h>
0017 #include <linux/module.h>
0018
0019 #include "hid-ids.h"
0020
0021 static __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
0022         unsigned int *rsize)
0023 {
0024     if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
0025             rdesc[106] == 0x03) {
0026         hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor\n");
0027         rdesc[105] = rdesc[110] = 0x03;
0028         rdesc[106] = rdesc[111] = 0x21;
0029     }
0030     return rdesc;
0031 }
0032
0033 #define sp_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
0034         EV_KEY, (c))
0035 static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0036         struct hid_field *field, struct hid_usage *usage,
0037         unsigned long **bit, int *max)
0038 {
0039     if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
0040         return 0;
0041
0042     switch (usage->hid & HID_USAGE) {
0043     case 0x2003: sp_map_key_clear(KEY_ZOOMIN);      break;
0044     case 0x2103: sp_map_key_clear(KEY_ZOOMOUT); break;
0045     default:
0046         return 0;
0047     }
0048     return 1;
0049 }
0050
0051 static const struct hid_device_id sp_devices[] = {
0052     { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
0053     { }
0054 };
0055 MODULE_DEVICE_TABLE(hid, sp_devices);
0056
0057 static struct hid_driver sp_driver = {
0058     .name = "sunplus",
0059     .id_table = sp_devices,
0060     .report_fixup = sp_report_fixup,
0061     .input_mapping = sp_input_mapping,
0062 };
0063 module_hid_driver(sp_driver);
0064
0065 MODULE_LICENSE("GPL");