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linux-next/drivers/hid/hid-samsung.c
Thomas Weißschuh fe73965d07 HID: change return type of report_fixup() to const 
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>
2024-08-27 16:29:55 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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) 2008 Jiri Slaby
* Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
*
* This driver supports several HID devices:
*
* [0419:0001] Samsung IrDA remote controller (reports as Cypress USB Mouse).
* various hid report fixups for different variants.
*
* [0419:0600] Creative Desktop Wireless 6000 keyboard/mouse combo
* several key mappings used from the consumer usage page
* deviate from the USB HUT 1.12 standard.
*/
/*
*/
#include <linux/device.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
/*
* There are several variants for 0419:0001:
*
* 1. 184 byte report descriptor
* 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.
*
* 2. 203 byte report descriptor
* Report #4 has an array field with logical range 0..18 instead of 1..15.
*
* 3. 135 byte report descriptor
* Report #4 has an array field with logical range 0..17 instead of 1..14.
*
* 4. 171 byte report descriptor
* Report #3 has an array field with logical range 0..1 instead of 1..3.
*/
static inline void samsung_irda_dev_trace(struct hid_device *hdev,
unsigned int rsize)
{
hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n",
rsize);
}
static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
if (*rsize == 184 && !memcmp(&rdesc[175], "\x25\x40\x75\x30\x95\x01", 6) &&
rdesc[182] == 0x40) {
samsung_irda_dev_trace(hdev, 184);
rdesc[176] = 0xff;
rdesc[178] = 0x08;
rdesc[180] = 0x06;
rdesc[182] = 0x42;
} else if (*rsize == 203 && !memcmp(&rdesc[192], "\x15\x00\x25\x12", 4)) {
samsung_irda_dev_trace(hdev, 203);
rdesc[193] = 0x01;
rdesc[195] = 0x0f;
} else if (*rsize == 135 && !memcmp(&rdesc[124], "\x15\x00\x25\x11", 4)) {
samsung_irda_dev_trace(hdev, 135);
rdesc[125] = 0x01;
rdesc[127] = 0x0e;
} else if (*rsize == 171 && !memcmp(&rdesc[160], "\x15\x00\x25\x01", 4)) {
samsung_irda_dev_trace(hdev, 171);
rdesc[161] = 0x01;
rdesc[163] = 0x03;
}
return rdesc;
}
#define samsung_kbd_mouse_map_key_clear(c) \
hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
if (ifnum != 1 || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE))
return 0;
dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n",
usage->hid & HID_USAGE);
switch (usage->hid & HID_USAGE) {
/* report 2 */
case 0x183:
samsung_kbd_mouse_map_key_clear(KEY_MEDIA);
break;
case 0x195:
samsung_kbd_mouse_map_key_clear(KEY_EMAIL);
break;
case 0x196:
samsung_kbd_mouse_map_key_clear(KEY_CALC);
break;
case 0x197:
samsung_kbd_mouse_map_key_clear(KEY_COMPUTER);
break;
case 0x22b:
samsung_kbd_mouse_map_key_clear(KEY_SEARCH);
break;
case 0x22c:
samsung_kbd_mouse_map_key_clear(KEY_WWW);
break;
case 0x22d:
samsung_kbd_mouse_map_key_clear(KEY_BACK);
break;
case 0x22e:
samsung_kbd_mouse_map_key_clear(KEY_FORWARD);
break;
case 0x22f:
samsung_kbd_mouse_map_key_clear(KEY_FAVORITES);
break;
case 0x230:
samsung_kbd_mouse_map_key_clear(KEY_REFRESH);
break;
case 0x231:
samsung_kbd_mouse_map_key_clear(KEY_STOP);
break;
default:
return 0;
}
return 1;
}
static int samsung_kbd_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if (!(HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE) ||
HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)))
return 0;
dbg_hid("samsung wireless keyboard input mapping event [0x%x]\n",
usage->hid & HID_USAGE);
if (HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)) {
set_bit(EV_REP, hi->input->evbit);
switch (usage->hid & HID_USAGE) {
case 0x32:
samsung_kbd_mouse_map_key_clear(KEY_BACKSLASH);
break;
case 0x64:
samsung_kbd_mouse_map_key_clear(KEY_102ND);
break;
/* Only for BR keyboard */
case 0x87:
samsung_kbd_mouse_map_key_clear(KEY_RO);
break;
default:
return 0;
}
}
if (HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE)) {
switch (usage->hid & HID_USAGE) {
/* report 2 */
/* MENU */
case 0x040:
samsung_kbd_mouse_map_key_clear(KEY_MENU);
break;
case 0x18a:
samsung_kbd_mouse_map_key_clear(KEY_MAIL);
break;
case 0x196:
samsung_kbd_mouse_map_key_clear(KEY_WWW);
break;
case 0x19e:
samsung_kbd_mouse_map_key_clear(KEY_SCREENLOCK);
break;
case 0x221:
samsung_kbd_mouse_map_key_clear(KEY_SEARCH);
break;
case 0x223:
samsung_kbd_mouse_map_key_clear(KEY_HOMEPAGE);
break;
/* Smtart Voice Key */
case 0x300:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY13);
break;
/* RECENTAPPS */
case 0x301:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY1);
break;
/* APPLICATION */
case 0x302:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY2);
break;
/* Voice search */
case 0x305:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY4);
break;
/* QPANEL on/off */
case 0x306:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY5);
break;
/* SIP on/off */
case 0x307:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY3);
break;
/* LANG */
case 0x308:
samsung_kbd_mouse_map_key_clear(KEY_LANGUAGE);
break;
case 0x30a:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSDOWN);
break;
case 0x30b:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSUP);
break;
default:
return 0;
}
}
return 1;
}
static int samsung_gamepad_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if (!(HID_UP_BUTTON == (usage->hid & HID_USAGE_PAGE) ||
HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE)))
return 0;
dbg_hid("samsung wireless gamepad input mapping event [0x%x], %ld, %ld, [0x%x]\n",
usage->hid & HID_USAGE, hi->input->evbit[0], hi->input->absbit[0], usage->hid & HID_USAGE_PAGE);
if (HID_UP_BUTTON == (usage->hid & HID_USAGE_PAGE)) {
switch (usage->hid & HID_USAGE) {
case 0x01:
samsung_kbd_mouse_map_key_clear(BTN_A);
break;
case 0x02:
samsung_kbd_mouse_map_key_clear(BTN_B);
break;
case 0x03:
samsung_kbd_mouse_map_key_clear(BTN_C);
break;
case 0x04:
samsung_kbd_mouse_map_key_clear(BTN_X);
break;
case 0x05:
samsung_kbd_mouse_map_key_clear(BTN_Y);
break;
case 0x06:
samsung_kbd_mouse_map_key_clear(BTN_Z);
break;
case 0x07:
samsung_kbd_mouse_map_key_clear(BTN_TL);
break;
case 0x08:
samsung_kbd_mouse_map_key_clear(BTN_TR);
break;
case 0x09:
samsung_kbd_mouse_map_key_clear(BTN_TL2);
break;
case 0x0a:
samsung_kbd_mouse_map_key_clear(BTN_TR2);
break;
case 0x0b:
samsung_kbd_mouse_map_key_clear(BTN_SELECT);
break;
case 0x0c:
samsung_kbd_mouse_map_key_clear(BTN_START);
break;
case 0x0d:
samsung_kbd_mouse_map_key_clear(BTN_MODE);
break;
case 0x0e:
samsung_kbd_mouse_map_key_clear(BTN_THUMBL);
break;
case 0x0f:
samsung_kbd_mouse_map_key_clear(BTN_THUMBR);
break;
case 0x10:
samsung_kbd_mouse_map_key_clear(0x13f);
break;
default:
return 0;
}
}
if (HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE)) {
switch (usage->hid & HID_USAGE) {
case 0x040:
samsung_kbd_mouse_map_key_clear(KEY_MENU);
break;
case 0x223:
samsung_kbd_mouse_map_key_clear(KEY_HOMEPAGE);
break;
case 0x224:
samsung_kbd_mouse_map_key_clear(KEY_BACK);
break;
/* Screen Capture */
case 0x303:
samsung_kbd_mouse_map_key_clear(KEY_SYSRQ);
break;
default:
return 0;
}
}
return 1;
}
static int samsung_actionmouse_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
dbg_hid("samsung wireless actionmouse input mapping event [0x%x], [0x%x], %ld, %ld, [0x%x]\n",
usage->hid, usage->hid & HID_USAGE, hi->input->evbit[0], hi->input->absbit[0],
usage->hid & HID_USAGE_PAGE);
if (((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) && ((usage->hid & HID_USAGE_PAGE) != HID_UP_BUTTON))
return 0;
switch (usage->hid & HID_USAGE) {
case 0x301:
samsung_kbd_mouse_map_key_clear(254);
break;
default:
return 0;
}
return 1;
}
static int samsung_universal_kbd_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if (!(HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE) ||
HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)))
return 0;
dbg_hid("samsung wireless keyboard input mapping event [0x%x]\n",
usage->hid & HID_USAGE);
if (HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)) {
set_bit(EV_REP, hi->input->evbit);
switch (usage->hid & HID_USAGE) {
case 0x32:
samsung_kbd_mouse_map_key_clear(KEY_BACKSLASH);
break;
case 0x64:
samsung_kbd_mouse_map_key_clear(KEY_102ND);
break;
/* Only for BR keyboard */
case 0x87:
samsung_kbd_mouse_map_key_clear(KEY_RO);
break;
default:
return 0;
}
}
if (HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE)) {
switch (usage->hid & HID_USAGE) {
/* report 2 */
/* MENU */
case 0x040:
samsung_kbd_mouse_map_key_clear(KEY_MENU);
break;
case 0x18a:
samsung_kbd_mouse_map_key_clear(KEY_MAIL);
break;
case 0x196:
samsung_kbd_mouse_map_key_clear(KEY_WWW);
break;
case 0x19e:
samsung_kbd_mouse_map_key_clear(KEY_SCREENLOCK);
break;
case 0x221:
samsung_kbd_mouse_map_key_clear(KEY_SEARCH);
break;
case 0x223:
samsung_kbd_mouse_map_key_clear(KEY_HOMEPAGE);
break;
/* RECENTAPPS */
case 0x301:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY1);
break;
/* APPLICATION */
case 0x302:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY2);
break;
/* Voice search */
case 0x305:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY4);
break;
/* QPANEL on/off */
case 0x306:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY5);
break;
/* SIP on/off */
case 0x307:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY3);
break;
/* LANG */
case 0x308:
samsung_kbd_mouse_map_key_clear(KEY_LANGUAGE);
break;
case 0x30a:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSDOWN);
break;
case 0x070:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSDOWN);
break;
case 0x30b:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSUP);
break;
case 0x06f:
samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSUP);
break;
/* S-Finder */
case 0x304:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY7);
break;
/* Screen Capture */
case 0x303:
samsung_kbd_mouse_map_key_clear(KEY_SYSRQ);
break;
/* Multi Window */
case 0x309:
samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY9);
break;
/* HotKey App 1 */
case 0x071:
samsung_kbd_mouse_map_key_clear(0x2f5);
break;
/* HotKey App 2 */
case 0x072:
samsung_kbd_mouse_map_key_clear(0x2f6);
break;
/* HotKey App 3 */
case 0x073:
samsung_kbd_mouse_map_key_clear(0x2f7);
break;
/* Dex */
case 0x06e:
samsung_kbd_mouse_map_key_clear(0x2bd);
break;
default:
return 0;
}
}
return 1;
}
static const __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
if (hdev->product == USB_DEVICE_ID_SAMSUNG_IR_REMOTE && hid_is_usb(hdev))
rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize);
return rdesc;
}
static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
int ret = 0;
if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE && hid_is_usb(hdev))
ret = samsung_kbd_mouse_input_mapping(hdev,
hi, field, usage, bit, max);
else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD)
ret = samsung_kbd_input_mapping(hdev,
hi, field, usage, bit, max);
else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD)
ret = samsung_gamepad_input_mapping(hdev,
hi, field, usage, bit, max);
else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE)
ret = samsung_actionmouse_input_mapping(hdev,
hi, field, usage, bit, max);
else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD)
ret = samsung_universal_kbd_input_mapping(hdev,
hi, field, usage, bit, max);
else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD)
ret = samsung_universal_kbd_input_mapping(hdev,
hi, field, usage, bit, max);
return ret;
}
static int samsung_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
int ret;
unsigned int cmask = HID_CONNECT_DEFAULT;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err_free;
}
if (hdev->product == USB_DEVICE_ID_SAMSUNG_IR_REMOTE) {
if (!hid_is_usb(hdev)) {
ret = -EINVAL;
goto err_free;
}
if (hdev->rsize == 184) {
/* disable hidinput, force hiddev */
cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
HID_CONNECT_HIDDEV_FORCE;
}
}
ret = hid_hw_start(hdev, cmask);
if (ret) {
hid_err(hdev, "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) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD) },
{ }
};
MODULE_DEVICE_TABLE(hid, samsung_devices);
static struct hid_driver samsung_driver = {
.name = "samsung",
.id_table = samsung_devices,
.report_fixup = samsung_report_fixup,
.input_mapping = samsung_input_mapping,
.probe = samsung_probe,
};
module_hid_driver(samsung_driver);
MODULE_DESCRIPTION("HID driver for some samsung \"special\" devices");
MODULE_LICENSE("GPL");
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