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Linux/drivers/hid/hid-samsung.c

  1 /*
  2  *  HID driver for some samsung "special" devices
  3  *
  4  *  Copyright (c) 1999 Andreas Gal
  5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
  6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
  7  *  Copyright (c) 2006-2007 Jiri Kosina
  8  *  Copyright (c) 2008 Jiri Slaby
  9  *  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
 10  *
 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  * This program is free software; you can redistribute it and/or modify it
 25  * under the terms of the GNU General Public License as published by the Free
 26  * Software Foundation; either version 2 of the License, or (at your option)
 27  * any later version.
 28  */
 29 
 30 #include <linux/device.h>
 31 #include <linux/usb.h>
 32 #include <linux/hid.h>
 33 #include <linux/module.h>
 34 
 35 #include "hid-ids.h"
 36 
 37 /*
 38  * There are several variants for 0419:0001:
 39  *
 40  * 1. 184 byte report descriptor
 41  * Vendor specific report #4 has a size of 48 bit,
 42  * and therefore is not accepted when inspecting the descriptors.
 43  * As a workaround we reinterpret the report as:
 44  *   Variable type, count 6, size 8 bit, log. maximum 255
 45  * The burden to reconstruct the data is moved into user space.
 46  *
 47  * 2. 203 byte report descriptor
 48  * Report #4 has an array field with logical range 0..18 instead of 1..15.
 49  *
 50  * 3. 135 byte report descriptor
 51  * Report #4 has an array field with logical range 0..17 instead of 1..14.
 52  *
 53  * 4. 171 byte report descriptor
 54  * Report #3 has an array field with logical range 0..1 instead of 1..3.
 55  */
 56 static inline void samsung_irda_dev_trace(struct hid_device *hdev,
 57                 unsigned int rsize)
 58 {
 59         hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n",
 60                  rsize);
 61 }
 62 
 63 static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 64                 unsigned int *rsize)
 65 {
 66         if (*rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
 67                         rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
 68                         rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
 69                         rdesc[182] == 0x40) {
 70                 samsung_irda_dev_trace(hdev, 184);
 71                 rdesc[176] = 0xff;
 72                 rdesc[178] = 0x08;
 73                 rdesc[180] = 0x06;
 74                 rdesc[182] = 0x42;
 75         } else
 76         if (*rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
 77                         rdesc[194] == 0x25 && rdesc[195] == 0x12) {
 78                 samsung_irda_dev_trace(hdev, 203);
 79                 rdesc[193] = 0x1;
 80                 rdesc[195] = 0xf;
 81         } else
 82         if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
 83                         rdesc[126] == 0x25 && rdesc[127] == 0x11) {
 84                 samsung_irda_dev_trace(hdev, 135);
 85                 rdesc[125] = 0x1;
 86                 rdesc[127] = 0xe;
 87         } else
 88         if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 &&
 89                         rdesc[162] == 0x25 && rdesc[163] == 0x01) {
 90                 samsung_irda_dev_trace(hdev, 171);
 91                 rdesc[161] = 0x1;
 92                 rdesc[163] = 0x3;
 93         }
 94         return rdesc;
 95 }
 96 
 97 #define samsung_kbd_mouse_map_key_clear(c) \
 98         hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
 99 
100 static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
101         struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
102         unsigned long **bit, int *max)
103 {
104         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
105         unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
106 
107         if (1 != ifnum || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE))
108                 return 0;
109 
110         dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n",
111                 usage->hid & HID_USAGE);
112 
113         switch (usage->hid & HID_USAGE) {
114         /* report 2 */
115         case 0x183: samsung_kbd_mouse_map_key_clear(KEY_MEDIA); break;
116         case 0x195: samsung_kbd_mouse_map_key_clear(KEY_EMAIL); break;
117         case 0x196: samsung_kbd_mouse_map_key_clear(KEY_CALC); break;
118         case 0x197: samsung_kbd_mouse_map_key_clear(KEY_COMPUTER); break;
119         case 0x22b: samsung_kbd_mouse_map_key_clear(KEY_SEARCH); break;
120         case 0x22c: samsung_kbd_mouse_map_key_clear(KEY_WWW); break;
121         case 0x22d: samsung_kbd_mouse_map_key_clear(KEY_BACK); break;
122         case 0x22e: samsung_kbd_mouse_map_key_clear(KEY_FORWARD); break;
123         case 0x22f: samsung_kbd_mouse_map_key_clear(KEY_FAVORITES); break;
124         case 0x230: samsung_kbd_mouse_map_key_clear(KEY_REFRESH); break;
125         case 0x231: samsung_kbd_mouse_map_key_clear(KEY_STOP); break;
126         default:
127                 return 0;
128         }
129 
130         return 1;
131 }
132 
133 static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
134         unsigned int *rsize)
135 {
136         if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product)
137                 rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize);
138         return rdesc;
139 }
140 
141 static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
142         struct hid_field *field, struct hid_usage *usage,
143         unsigned long **bit, int *max)
144 {
145         int ret = 0;
146 
147         if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product)
148                 ret = samsung_kbd_mouse_input_mapping(hdev,
149                         hi, field, usage, bit, max);
150 
151         return ret;
152 }
153 
154 static int samsung_probe(struct hid_device *hdev,
155                 const struct hid_device_id *id)
156 {
157         int ret;
158         unsigned int cmask = HID_CONNECT_DEFAULT;
159 
160         ret = hid_parse(hdev);
161         if (ret) {
162                 hid_err(hdev, "parse failed\n");
163                 goto err_free;
164         }
165 
166         if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) {
167                 if (hdev->rsize == 184) {
168                         /* disable hidinput, force hiddev */
169                         cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
170                                 HID_CONNECT_HIDDEV_FORCE;
171                 }
172         }
173 
174         ret = hid_hw_start(hdev, cmask);
175         if (ret) {
176                 hid_err(hdev, "hw start failed\n");
177                 goto err_free;
178         }
179 
180         return 0;
181 err_free:
182         return ret;
183 }
184 
185 static const struct hid_device_id samsung_devices[] = {
186         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
187         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
188         { }
189 };
190 MODULE_DEVICE_TABLE(hid, samsung_devices);
191 
192 static struct hid_driver samsung_driver = {
193         .name = "samsung",
194         .id_table = samsung_devices,
195         .report_fixup = samsung_report_fixup,
196         .input_mapping = samsung_input_mapping,
197         .probe = samsung_probe,
198 };
199 module_hid_driver(samsung_driver);
200 
201 MODULE_LICENSE("GPL");
202 

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