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README.md
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README.md
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# KernelPatch / APatch - Android Generic BT Keyboard Fix
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### Description
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This is a [KernelPatch](https://github.com/bmax121/KernelPatch) / [APatch](https://github.com/bmax121/APatch) module used to fix an
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issue with the Samsung Galaxy Tab S7 on some kernels where a Bluetooth keyboard connects but fails to work.
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The underlying issue is that some cheap keyboards report their USB Vendor ID as `0x04E8` and Product ID as `0x7021`, which is the
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same as a Samsung Wireless Keyboard. This causes the Samsung HID driver to claim the device, which doesn't support the keyboard properly.
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This patch blocks the Samsung driver from matching these devices and prevents custom quirks from being applied, allowing the generic HID driver to handle them instead.
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### Installation
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Install the patch by copying the `sam_hid_kbd_rem.kpm` file to your device, opening APatch, and loading/installing the module.
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### Kernel Patch
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You can also patch the kernel directly by applying the provided patch file `sam_hid_kbd_rem.patch`. At the time of writing this, the patch was
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applied to the [LineageOS/android_kernel_samsung_sm8250](https://github.com/LineageOS/android_kernel_samsung_sm8250/tree/8acbe9760ef02f0d044c0f0ec1bb469fa383fb07)
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at hash `8acbe9760ef02f0d044c0f0ec1bb469fa383fb07`.
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145
sam_hid_kbd_rem.patch
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sam_hid_kbd_rem.patch
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diff --git i/drivers/hid/hid-quirks.c w/drivers/hid/hid-quirks.c
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index f30faf09823c..2a8334e66db3 100644
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--- i/drivers/hid/hid-quirks.c
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+++ w/drivers/hid/hid-quirks.c
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@@ -638,7 +638,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
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#if IS_ENABLED(CONFIG_HID_SAMSUNG)
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{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
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- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_BOOKCOVER) },
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diff --git i/drivers/hid/hid-samsung.c w/drivers/hid/hid-samsung.c
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index 75825e3dd26b..4e2ce1476981 100644
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--- i/drivers/hid/hid-samsung.c
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+++ w/drivers/hid/hid-samsung.c
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@@ -130,110 +130,6 @@ static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
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return 1;
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}
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-static int samsung_kbd_input_mapping(struct hid_device *hdev,
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- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
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- unsigned long **bit, int *max)
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-{
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- if (!(HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE) ||
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- HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)))
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- return 0;
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-
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- dbg_hid("samsung wireless keyboard input mapping event [0x%x]\n",
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- usage->hid & HID_USAGE);
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-
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- if (HID_UP_KEYBOARD == (usage->hid & HID_USAGE_PAGE)) {
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- switch (usage->hid & HID_USAGE) {
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- set_bit(EV_REP, hi->input->evbit);
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- /* Only for UK keyboard */
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- /* key found */
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-#ifdef CONFIG_HID_KK_UPGRADE
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- case 0x32:
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- samsung_kbd_mouse_map_key_clear(KEY_KBDILLUMTOGGLE);
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- break;
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- case 0x64:
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- samsung_kbd_mouse_map_key_clear(KEY_BACKSLASH);
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- break;
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-#else
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- case 0x32:
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- samsung_kbd_mouse_map_key_clear(KEY_BACKSLASH);
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- break;
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- case 0x64:
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- samsung_kbd_mouse_map_key_clear(KEY_102ND);
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- break;
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-#endif
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- /* Only for BR keyboard */
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- case 0x87:
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- samsung_kbd_mouse_map_key_clear(KEY_RO);
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- break;
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- default:
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- return 0;
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- }
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- }
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-
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- if (HID_UP_CONSUMER == (usage->hid & HID_USAGE_PAGE)) {
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- switch (usage->hid & HID_USAGE) {
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- /* report 2 */
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- /* MENU */
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- case 0x040:
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- samsung_kbd_mouse_map_key_clear(KEY_MENU);
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- break;
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- case 0x18a:
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- samsung_kbd_mouse_map_key_clear(KEY_MAIL);
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- break;
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- case 0x196:
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- samsung_kbd_mouse_map_key_clear(KEY_WWW);
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- break;
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- case 0x19e:
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- samsung_kbd_mouse_map_key_clear(KEY_SCREENLOCK);
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- break;
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- case 0x221:
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- samsung_kbd_mouse_map_key_clear(KEY_SEARCH);
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- break;
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- case 0x223:
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- samsung_kbd_mouse_map_key_clear(KEY_HOMEPAGE);
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- break;
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- /* Smtart Voice Key */
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- case 0x300:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY13);
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- break;
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- /* RECENTAPPS */
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- case 0x301:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY1);
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- break;
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- /* APPLICATION */
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- case 0x302:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY2);
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- break;
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- /* Voice search */
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- case 0x305:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY4);
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- break;
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- /* QPANEL on/off */
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- case 0x306:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY5);
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- break;
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- /* SIP on/off */
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- case 0x307:
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- samsung_kbd_mouse_map_key_clear(BTN_TRIGGER_HAPPY3);
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- break;
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- /* LANG */
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- case 0x308:
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- samsung_kbd_mouse_map_key_clear(KEY_LANGUAGE);
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- break;
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- case 0x30a:
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- samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSDOWN);
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- break;
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- case 0x30b:
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- samsung_kbd_mouse_map_key_clear(KEY_BRIGHTNESSUP);
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- break;
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- default:
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- return 0;
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- }
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- }
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-
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- return 1;
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-}
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-
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static int samsung_gamepad_input_mapping(struct hid_device *hdev,
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struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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@@ -499,9 +395,6 @@ static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product)
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ret = samsung_kbd_mouse_input_mapping(hdev,
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hi, field, usage, bit, max);
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- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD)
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- ret = samsung_kbd_input_mapping(hdev,
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- hi, field, usage, bit, max);
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else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD)
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ret = samsung_gamepad_input_mapping(hdev,
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hi, field, usage, bit, max);
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@@ -555,7 +448,6 @@ static int samsung_probe(struct hid_device *hdev,
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static const struct hid_device_id samsung_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
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- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD) },
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