cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hid-petalynx.c (2591B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  HID driver for some petalynx "special" devices
      4 *
      5 *  Copyright (c) 1999 Andreas Gal
      6 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
      7 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
      8 *  Copyright (c) 2006-2007 Jiri Kosina
      9 *  Copyright (c) 2008 Jiri Slaby
     10 */
     11
     12/*
     13 */
     14
     15#include <linux/device.h>
     16#include <linux/hid.h>
     17#include <linux/module.h>
     18
     19#include "hid-ids.h"
     20
     21/* Petalynx Maxter Remote has maximum for consumer page set too low */
     22static __u8 *pl_report_fixup(struct hid_device *hdev, __u8 *rdesc,
     23		unsigned int *rsize)
     24{
     25	if (*rsize >= 62 && rdesc[39] == 0x2a && rdesc[40] == 0xf5 &&
     26			rdesc[41] == 0x00 && rdesc[59] == 0x26 &&
     27			rdesc[60] == 0xf9 && rdesc[61] == 0x00) {
     28		hid_info(hdev, "fixing up Petalynx Maxter Remote report descriptor\n");
     29		rdesc[60] = 0xfa;
     30		rdesc[40] = 0xfa;
     31	}
     32	return rdesc;
     33}
     34
     35#define pl_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
     36					EV_KEY, (c))
     37static int pl_input_mapping(struct hid_device *hdev, struct hid_input *hi,
     38		struct hid_field *field, struct hid_usage *usage,
     39		unsigned long **bit, int *max)
     40{
     41	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_LOGIVENDOR) {
     42		switch (usage->hid & HID_USAGE) {
     43		case 0x05a: pl_map_key_clear(KEY_TEXT);		break;
     44		case 0x05b: pl_map_key_clear(KEY_RED);		break;
     45		case 0x05c: pl_map_key_clear(KEY_GREEN);	break;
     46		case 0x05d: pl_map_key_clear(KEY_YELLOW);	break;
     47		case 0x05e: pl_map_key_clear(KEY_BLUE);		break;
     48		default:
     49			return 0;
     50		}
     51		return 1;
     52	}
     53
     54	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
     55		switch (usage->hid & HID_USAGE) {
     56		case 0x0f6: pl_map_key_clear(KEY_NEXT);		break;
     57		case 0x0fa: pl_map_key_clear(KEY_BACK);		break;
     58		default:
     59			return 0;
     60		}
     61		return 1;
     62	}
     63
     64	return 0;
     65}
     66
     67static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
     68{
     69	int ret;
     70
     71	hdev->quirks |= HID_QUIRK_NOGET;
     72
     73	ret = hid_parse(hdev);
     74	if (ret) {
     75		hid_err(hdev, "parse failed\n");
     76		goto err_free;
     77	}
     78
     79	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
     80	if (ret) {
     81		hid_err(hdev, "hw start failed\n");
     82		goto err_free;
     83	}
     84
     85	return 0;
     86err_free:
     87	return ret;
     88}
     89
     90static const struct hid_device_id pl_devices[] = {
     91	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
     92	{ }
     93};
     94MODULE_DEVICE_TABLE(hid, pl_devices);
     95
     96static struct hid_driver pl_driver = {
     97	.name = "petalynx",
     98	.id_table = pl_devices,
     99	.report_fixup = pl_report_fixup,
    100	.input_mapping = pl_input_mapping,
    101	.probe = pl_probe,
    102};
    103module_hid_driver(pl_driver);
    104
    105MODULE_LICENSE("GPL");