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By allowing the drivers to return a "const *" they can constify their static report arrays. This makes it clear to driver authors that the HID core will not modify those reports and they can be reused for multiple devices. Furthermore security is slightly improved as those reports are protected against accidental or malicious modifications. [bentiss: fixup hid-cougar.c and hid-multitouch.c for latest version of the master branch] Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-6-f53d7a7b29d8@weissschuh.net Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
131 lines
7.0 KiB
C
131 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for SiGma Micro-based keyboards
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*
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* Copyright (c) 2016 Kinglong Mee
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* Copyright (c) 2021 Desmond Lim
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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static const __u8 sm_0059_rdesc[] = {
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0x05, 0x0c, /* Usage Page (Consumer Devices) 0 */
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0x09, 0x01, /* Usage (Consumer Control) 2 */
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0xa1, 0x01, /* Collection (Application) 4 */
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0x85, 0x01, /* Report ID (1) 6 */
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0x19, 0x00, /* Usage Minimum (0) 8 */
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0x2a, 0x3c, 0x02, /* Usage Maximum (572) 10 */
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0x15, 0x00, /* Logical Minimum (0) 13 */
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0x26, 0x3c, 0x02, /* Logical Maximum (572) 15 */
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0x95, 0x01, /* Report Count (1) 18 */
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0x75, 0x10, /* Report Size (16) 20 */
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0x81, 0x00, /* Input (Data,Arr,Abs) 22 */
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0xc0, /* End Collection 24 */
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0x05, 0x01, /* Usage Page (Generic Desktop) 25 */
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0x09, 0x80, /* Usage (System Control) 27 */
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0xa1, 0x01, /* Collection (Application) 29 */
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0x85, 0x02, /* Report ID (2) 31 */
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0x19, 0x81, /* Usage Minimum (129) 33 */
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0x29, 0x83, /* Usage Maximum (131) 35 */
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0x25, 0x01, /* Logical Maximum (1) 37 */
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0x75, 0x01, /* Report Size (1) 39 */
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0x95, 0x03, /* Report Count (3) 41 */
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0x81, 0x02, /* Input (Data,Var,Abs) 43 */
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0x95, 0x05, /* Report Count (5) 45 */
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0x81, 0x01, /* Input (Cnst,Arr,Abs) 47 */
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0xc0, /* End Collection 49 */
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0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) 50 */
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0x09, 0x01, /* Usage (Vendor Usage 1) 53 */
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0xa1, 0x01, /* Collection (Application) 55 */
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0x85, 0x03, /* Report ID (3) 57 */
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0x1a, 0xf1, 0x00, /* Usage Minimum (241) 59 */
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0x2a, 0xf8, 0x00, /* Usage Maximum (248) 62 */
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0x15, 0x00, /* Logical Minimum (0) 65 */
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0x25, 0x01, /* Logical Maximum (1) 67 */
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0x75, 0x01, /* Report Size (1) 69 */
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0x95, 0x08, /* Report Count (8) 71 */
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0x81, 0x02, /* Input (Data,Var,Abs) 73 */
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0xc0, /* End Collection 75 */
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0x05, 0x01, /* Usage Page (Generic Desktop) 76 */
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0x09, 0x06, /* Usage (Keyboard) 78 */
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0xa1, 0x01, /* Collection (Application) 80 */
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0x85, 0x04, /* Report ID (4) 82 */
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0x05, 0x07, /* Usage Page (Keyboard) 84 */
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0x19, 0xe0, /* Usage Minimum (224) 86 */
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0x29, 0xe7, /* Usage Maximum (231) 88 */
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0x15, 0x00, /* Logical Minimum (0) 90 */
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0x25, 0x01, /* Logical Maximum (1) 92 */
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0x75, 0x01, /* Report Size (1) 94 */
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0x95, 0x08, /* Report Count (8) 96 */
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0x81, 0x00, /* Input (Data,Arr,Abs) 98 */
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0x95, 0x30, /* Report Count (48) 100 */
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0x75, 0x01, /* Report Size (1) 102 */
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0x15, 0x00, /* Logical Minimum (0) 104 */
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0x25, 0x01, /* Logical Maximum (1) 106 */
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0x05, 0x07, /* Usage Page (Keyboard) 108 */
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0x19, 0x00, /* Usage Minimum (0) 110 */
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0x29, 0x2f, /* Usage Maximum (47) 112 */
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0x81, 0x02, /* Input (Data,Var,Abs) 114 */
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0xc0, /* End Collection 116 */
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0x05, 0x01, /* Usage Page (Generic Desktop) 117 */
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0x09, 0x06, /* Usage (Keyboard) 119 */
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0xa1, 0x01, /* Collection (Application) 121 */
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0x85, 0x05, /* Report ID (5) 123 */
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0x95, 0x38, /* Report Count (56) 125 */
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0x75, 0x01, /* Report Size (1) 127 */
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0x15, 0x00, /* Logical Minimum (0) 129 */
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0x25, 0x01, /* Logical Maximum (1) 131 */
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0x05, 0x07, /* Usage Page (Keyboard) 133 */
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0x19, 0x30, /* Usage Minimum (48) 135 */
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0x29, 0x67, /* Usage Maximum (103) 137 */
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0x81, 0x02, /* Input (Data,Var,Abs) 139 */
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0xc0, /* End Collection 141 */
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0x05, 0x01, /* Usage Page (Generic Desktop) 142 */
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0x09, 0x06, /* Usage (Keyboard) 144 */
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0xa1, 0x01, /* Collection (Application) 146 */
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0x85, 0x06, /* Report ID (6) 148 */
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0x95, 0x38, /* Report Count (56) 150 */
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0x75, 0x01, /* Report Size (1) 152 */
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0x15, 0x00, /* Logical Minimum (0) 154 */
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0x25, 0x01, /* Logical Maximum (1) 156 */
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0x05, 0x07, /* Usage Page (Keyboard) 158 */
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0x19, 0x68, /* Usage Minimum (104) 160 */
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0x29, 0x9f, /* Usage Maximum (159) 162 */
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0x81, 0x02, /* Input (Data,Var,Abs) 164 */
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0xc0, /* End Collection 166 */
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};
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static const __u8 *sm_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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if (*rsize == sizeof(sm_0059_rdesc) &&
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!memcmp(sm_0059_rdesc, rdesc, *rsize)) {
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hid_info(hdev, "Fixing up SiGma Micro report descriptor\n");
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rdesc[99] = 0x02;
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}
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return rdesc;
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}
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static const struct hid_device_id sm_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_SIGMA_MICRO,
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USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD2) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, sm_devices);
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static struct hid_driver sm_driver = {
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.name = "sigmamicro",
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.id_table = sm_devices,
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.report_fixup = sm_report_fixup,
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};
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module_hid_driver(sm_driver);
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MODULE_AUTHOR("Kinglong Mee <kinglongmee@gmail.com>");
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MODULE_AUTHOR("Desmond Lim <peckishrine@gmail.com>");
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MODULE_DESCRIPTION("SiGma Micro HID driver");
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MODULE_LICENSE("GPL");
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