drivers/hid/hid-saitek.c

   1 /*
   2  *  HID driver for Saitek devices.
   3  *
   4  *  PS1000 (USB gamepad):
   5  *  Fixes the HID report descriptor by removing a non-existent axis and
   6  *  clearing the constant bit on the input reports for buttons and d-pad.
   7  *  (This module is based on "hid-ortek".)
   8  *  Copyright (c) 2012 Andreas Hübner
   9  *
  10  *  R.A.T.7, R.A.T.9, M.M.O.7 (USB gaming mice):
  11  *  Fixes the mode button which cycles through three constantly pressed
  12  *  buttons. All three press events are mapped to one button and the
  13  *  missing release event is generated immediately.
  14  *
  15  */
  16
  17 /*
  18  * This program is free software; you can redistribute it and/or modify it
  19  * under the terms of the GNU General Public License as published by the Free
  20  * Software Foundation; either version 2 of the License, or (at your option)
  21  * any later version.
  22  */
  23
  24 #include <linux/device.h>
  25 #include <linux/hid.h>
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28
  29 #include "hid-ids.h"
  30
  31 #define SAITEK_FIX_PS1000       0x0001
  32 #define SAITEK_RELEASE_MODE_RAT7        0x0002
  33 #define SAITEK_RELEASE_MODE_MMO7        0x0004
  34
  35 struct saitek_sc {
  36         unsigned long quirks;
  37         int mode;
  38 };
  39
  40 static int saitek_probe(struct hid_device *hdev,
  41                 const struct hid_device_id *id)
  42 {
  43         unsigned long quirks = id->driver_data;
  44         struct saitek_sc *ssc;
  45         int ret;
  46
  47         ssc = devm_kzalloc(&hdev->dev, sizeof(*ssc), GFP_KERNEL);
  48         if (ssc == NULL) {
  49                 hid_err(hdev, "can't alloc saitek descriptor\n");
  50                 return -ENOMEM;
  51         }
  52
  53         ssc->quirks = quirks;
  54         ssc->mode = -1;
  55
  56         hid_set_drvdata(hdev, ssc);
  57
  58         ret = hid_parse(hdev);
  59         if (ret) {
  60                 hid_err(hdev, "parse failed\n");
  61                 return ret;
  62         }
  63
  64         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  65         if (ret) {
  66                 hid_err(hdev, "hw start failed\n");
  67                 return ret;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static __u8 *saitek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  74                 unsigned int *rsize)
  75 {
  76         struct saitek_sc *ssc = hid_get_drvdata(hdev);
  77
  78         if ((ssc->quirks & SAITEK_FIX_PS1000) && *rsize == 137 &&
  79                         rdesc[20] == 0x09 && rdesc[21] == 0x33 &&
  80                         rdesc[94] == 0x81 && rdesc[95] == 0x03 &&
  81                         rdesc[110] == 0x81 && rdesc[111] == 0x03) {
  82
  83                 hid_info(hdev, "Fixing up Saitek PS1000 report descriptor\n");
  84
  85                 /* convert spurious axis to a "noop" Logical Minimum (0) */
  86                 rdesc[20] = 0x15;
  87                 rdesc[21] = 0x00;
  88
  89                 /* clear constant bit on buttons and d-pad */
  90                 rdesc[95] = 0x02;
  91                 rdesc[111] = 0x02;
  92
  93         }
  94         return rdesc;
  95 }
  96
  97 static int saitek_raw_event(struct hid_device *hdev,
  98                 struct hid_report *report, u8 *raw_data, int size)
  99 {
 100         struct saitek_sc *ssc = hid_get_drvdata(hdev);
 101
 102         if (ssc->quirks & SAITEK_RELEASE_MODE_RAT7 && size == 7) {
 103                 /* R.A.T.7 uses bits 13, 14, 15 for the mode */
 104                 int mode = -1;
 105                 if (raw_data[1] & 0x01)
 106                         mode = 0;
 107                 else if (raw_data[1] & 0x02)
 108                         mode = 1;
 109                 else if (raw_data[1] & 0x04)
 110                         mode = 2;
 111
 112                 /* clear mode bits */
 113                 raw_data[1] &= ~0x07;
 114
 115                 if (mode != ssc->mode) {
 116                         hid_dbg(hdev, "entered mode %d\n", mode);
 117                         if (ssc->mode != -1) {
 118                                 /* use bit 13 as the mode button */
 119                                 raw_data[1] |= 0x04;
 120                         }
 121                         ssc->mode = mode;
 122                 }
 123         } else if (ssc->quirks & SAITEK_RELEASE_MODE_MMO7 && size == 8) {
 124
 125                 /* M.M.O.7 uses bits 8, 22, 23 for the mode */
 126                 int mode = -1;
 127                 if (raw_data[1] & 0x80)
 128                         mode = 0;
 129                 else if (raw_data[2] & 0x01)
 130                         mode = 1;
 131                 else if (raw_data[2] & 0x02)
 132                         mode = 2;
 133
 134                 /* clear mode bits */
 135                 raw_data[1] &= ~0x80;
 136                 raw_data[2] &= ~0x03;
 137
 138                 if (mode != ssc->mode) {
 139                         hid_dbg(hdev, "entered mode %d\n", mode);
 140                         if (ssc->mode != -1) {
 141                                 /* use bit 8 as the mode button, bits 22
 142                                  * and 23 do not represent buttons
 143                                  * according to the HID report descriptor
 144                                  */
 145                                 raw_data[1] |= 0x80;
 146                         }
 147                         ssc->mode = mode;
 148                 }
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int saitek_event(struct hid_device *hdev, struct hid_field *field,
 155                 struct hid_usage *usage, __s32 value)
 156 {
 157         struct saitek_sc *ssc = hid_get_drvdata(hdev);
 158         struct input_dev *input = field->hidinput->input;
 159
 160         if (usage->type == EV_KEY && value &&
 161                         (((ssc->quirks & SAITEK_RELEASE_MODE_RAT7) &&
 162                           usage->code - BTN_MOUSE == 10) ||
 163                         ((ssc->quirks & SAITEK_RELEASE_MODE_MMO7) &&
 164                          usage->code - BTN_MOUSE == 15))) {
 165
 166                 input_report_key(input, usage->code, 1);
 167
 168                 /* report missing release event */
 169                 input_report_key(input, usage->code, 0);
 170
 171                 return 1;
 172         }
 173
 174         return 0;
 175 }
 176
 177 static const struct hid_device_id saitek_devices[] = {
 178         { HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_PS1000),
 179                 .driver_data = SAITEK_FIX_PS1000 },
 180         { HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RAT7),
 181                 .driver_data = SAITEK_RELEASE_MODE_RAT7 },
 182         { HID_USB_DEVICE(USB_VENDOR_ID_MADCATZ, USB_DEVICE_ID_MADCATZ_RAT9),
 183                 .driver_data = SAITEK_RELEASE_MODE_RAT7 },
 184         { HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_MMO7),
 185                 .driver_data = SAITEK_RELEASE_MODE_MMO7 },
 186         { }
 187 };
 188
 189 MODULE_DEVICE_TABLE(hid, saitek_devices);
 190
 191 static struct hid_driver saitek_driver = {
 192         .name = "saitek",
 193         .id_table = saitek_devices,
 194         .probe = saitek_probe,
 195         .report_fixup = saitek_report_fixup,
 196         .raw_event = saitek_raw_event,
 197         .event = saitek_event,
 198 };
 199 module_hid_driver(saitek_driver);
 200
 201 MODULE_LICENSE("GPL");