| // 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 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && |
| rdesc[177] == 0x75 && rdesc[178] == 0x30 && |
| rdesc[179] == 0x95 && rdesc[180] == 0x01 && |
| 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 && rdesc[192] == 0x15 && rdesc[193] == 0x0 && |
| rdesc[194] == 0x25 && rdesc[195] == 0x12) { |
| samsung_irda_dev_trace(hdev, 203); |
| rdesc[193] = 0x1; |
| rdesc[195] = 0xf; |
| } else |
| if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 && |
| rdesc[126] == 0x25 && rdesc[127] == 0x11) { |
| samsung_irda_dev_trace(hdev, 135); |
| rdesc[125] = 0x1; |
| rdesc[127] = 0xe; |
| } else |
| if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 && |
| rdesc[162] == 0x25 && rdesc[163] == 0x01) { |
| samsung_irda_dev_trace(hdev, 171); |
| rdesc[161] = 0x1; |
| rdesc[163] = 0x3; |
| } |
| 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 (1 != ifnum || 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 __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| unsigned int *rsize) |
| { |
| if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) |
| 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 (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product) |
| ret = samsung_kbd_mouse_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 (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) { |
| 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) }, |
| { } |
| }; |
| 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_LICENSE("GPL"); |