1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for some samsung "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 * Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk> 11 * 12 * This driver supports several HID devices: 13 * 14 * [0419:0001] Samsung IrDA remote controller (reports as Cypress USB Mouse). 15 * various hid report fixups for different variants. 16 * 17 * [0419:0600] Creative Desktop Wireless 6000 keyboard/mouse combo 18 * several key mappings used from the consumer usage page 19 * deviate from the USB HUT 1.12 standard. 20 */ 21 22 /* 23 */ 24 25 #include <linux/device.h> 26 #include <linux/usb.h> 27 #include <linux/hid.h> 28 #include <linux/module.h> 29 30 #include "hid-ids.h" 31 32 /* 33 * There are several variants for 0419:0001: 34 * 35 * 1. 184 byte report descriptor 36 * Vendor specific report #4 has a size of 48 bit, 37 * and therefore is not accepted when inspecting the descriptors. 38 * As a workaround we reinterpret the report as: 39 * Variable type, count 6, size 8 bit, log. maximum 255 40 * The burden to reconstruct the data is moved into user space. 41 * 42 * 2. 203 byte report descriptor 43 * Report #4 has an array field with logical range 0..18 instead of 1..15. 44 * 45 * 3. 135 byte report descriptor 46 * Report #4 has an array field with logical range 0..17 instead of 1..14. 47 * 48 * 4. 171 byte report descriptor 49 * Report #3 has an array field with logical range 0..1 instead of 1..3. 50 */ 51 static inline void samsung_irda_dev_trace(struct hid_device *hdev, 52 unsigned int rsize) 53 { 54 hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n", 55 rsize); 56 } 57 58 static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc, 59 unsigned int *rsize) 60 { 61 if (*rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && 62 rdesc[177] == 0x75 && rdesc[178] == 0x30 && 63 rdesc[179] == 0x95 && rdesc[180] == 0x01 && 64 rdesc[182] == 0x40) { 65 samsung_irda_dev_trace(hdev, 184); 66 rdesc[176] = 0xff; 67 rdesc[178] = 0x08; 68 rdesc[180] = 0x06; 69 rdesc[182] = 0x42; 70 } else 71 if (*rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 && 72 rdesc[194] == 0x25 && rdesc[195] == 0x12) { 73 samsung_irda_dev_trace(hdev, 203); 74 rdesc[193] = 0x1; 75 rdesc[195] = 0xf; 76 } else 77 if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 && 78 rdesc[126] == 0x25 && rdesc[127] == 0x11) { 79 samsung_irda_dev_trace(hdev, 135); 80 rdesc[125] = 0x1; 81 rdesc[127] = 0xe; 82 } else 83 if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 && 84 rdesc[162] == 0x25 && rdesc[163] == 0x01) { 85 samsung_irda_dev_trace(hdev, 171); 86 rdesc[161] = 0x1; 87 rdesc[163] = 0x3; 88 } 89 return rdesc; 90 } 91 92 #define samsung_kbd_mouse_map_key_clear(c) \ 93 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c)) 94 95 static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev, 96 struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, 97 unsigned long **bit, int *max) 98 { 99 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 100 unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 101 102 if (1 != ifnum || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE)) 103 return 0; 104 105 dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n", 106 usage->hid & HID_USAGE); 107 108 switch (usage->hid & HID_USAGE) { 109 /* report 2 */ 110 case 0x183: samsung_kbd_mouse_map_key_clear(KEY_MEDIA); break; 111 case 0x195: samsung_kbd_mouse_map_key_clear(KEY_EMAIL); break; 112 case 0x196: samsung_kbd_mouse_map_key_clear(KEY_CALC); break; 113 case 0x197: samsung_kbd_mouse_map_key_clear(KEY_COMPUTER); break; 114 case 0x22b: samsung_kbd_mouse_map_key_clear(KEY_SEARCH); break; 115 case 0x22c: samsung_kbd_mouse_map_key_clear(KEY_WWW); break; 116 case 0x22d: samsung_kbd_mouse_map_key_clear(KEY_BACK); break; 117 case 0x22e: samsung_kbd_mouse_map_key_clear(KEY_FORWARD); break; 118 case 0x22f: samsung_kbd_mouse_map_key_clear(KEY_FAVORITES); break; 119 case 0x230: samsung_kbd_mouse_map_key_clear(KEY_REFRESH); break; 120 case 0x231: samsung_kbd_mouse_map_key_clear(KEY_STOP); break; 121 default: 122 return 0; 123 } 124 125 return 1; 126 } 127 128 static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, 129 unsigned int *rsize) 130 { 131 if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) 132 rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize); 133 return rdesc; 134 } 135 136 static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi, 137 struct hid_field *field, struct hid_usage *usage, 138 unsigned long **bit, int *max) 139 { 140 int ret = 0; 141 142 if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product) 143 ret = samsung_kbd_mouse_input_mapping(hdev, 144 hi, field, usage, bit, max); 145 146 return ret; 147 } 148 149 static int samsung_probe(struct hid_device *hdev, 150 const struct hid_device_id *id) 151 { 152 int ret; 153 unsigned int cmask = HID_CONNECT_DEFAULT; 154 155 if (!hid_is_usb(hdev)) 156 return -EINVAL; 157 158 ret = hid_parse(hdev); 159 if (ret) { 160 hid_err(hdev, "parse failed\n"); 161 goto err_free; 162 } 163 164 if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) { 165 if (hdev->rsize == 184) { 166 /* disable hidinput, force hiddev */ 167 cmask = (cmask & ~HID_CONNECT_HIDINPUT) | 168 HID_CONNECT_HIDDEV_FORCE; 169 } 170 } 171 172 ret = hid_hw_start(hdev, cmask); 173 if (ret) { 174 hid_err(hdev, "hw start failed\n"); 175 goto err_free; 176 } 177 178 return 0; 179 err_free: 180 return ret; 181 } 182 183 static const struct hid_device_id samsung_devices[] = { 184 { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, 185 { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) }, 186 { } 187 }; 188 MODULE_DEVICE_TABLE(hid, samsung_devices); 189 190 static struct hid_driver samsung_driver = { 191 .name = "samsung", 192 .id_table = samsung_devices, 193 .report_fixup = samsung_report_fixup, 194 .input_mapping = samsung_input_mapping, 195 .probe = samsung_probe, 196 }; 197 module_hid_driver(samsung_driver); 198 199 MODULE_LICENSE("GPL"); 200