drivers/hid/hid-sjoy.c

   1 /*
   2  *  Force feedback support for SmartJoy PLUS PS2->USB adapter
   3  *
   4  *  Copyright (c) 2009 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
   5  *
   6  *  Based of hid-pl.c and hid-gaff.c
   7  *   Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
   8  *   Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 /* #define DEBUG */
  28
  29 #include <linux/input.h>
  30 #include <linux/slab.h>
  31 #include <linux/usb.h>
  32 #include <linux/hid.h>
  33 #include "hid-ids.h"
  34
  35 #ifdef CONFIG_SMARTJOYPLUS_FF
  36 #include "usbhid/usbhid.h"
  37
  38 struct sjoyff_device {
  39         struct hid_report *report;
  40 };
  41
  42 static int hid_sjoyff_play(struct input_dev *dev, void *data,
  43                          struct ff_effect *effect)
  44 {
  45         struct hid_device *hid = input_get_drvdata(dev);
  46         struct sjoyff_device *sjoyff = data;
  47         u32 left, right;
  48
  49         left = effect->u.rumble.strong_magnitude;
  50         right = effect->u.rumble.weak_magnitude;
  51         dev_dbg(&dev->dev, "called with 0x%08x 0x%08x\n", left, right);
  52
  53         left = left * 0xff / 0xffff;
  54         right = (right != 0); /* on/off only */
  55
  56         sjoyff->report->field[0]->value[1] = right;
  57         sjoyff->report->field[0]->value[2] = left;
  58         dev_dbg(&dev->dev, "running with 0x%02x 0x%02x\n", left, right);
  59         usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
  60
  61         return 0;
  62 }
  63
  64 static int sjoyff_init(struct hid_device *hid)
  65 {
  66         struct sjoyff_device *sjoyff;
  67         struct hid_report *report;
  68         struct hid_input *hidinput = list_entry(hid->inputs.next,
  69                                                 struct hid_input, list);
  70         struct list_head *report_list =
  71                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  72         struct list_head *report_ptr = report_list;
  73         struct input_dev *dev;
  74         int error;
  75
  76         if (list_empty(report_list)) {
  77                 dev_err(&hid->dev, "no output reports found\n");
  78                 return -ENODEV;
  79         }
  80
  81         report_ptr = report_ptr->next;
  82
  83         if (report_ptr == report_list) {
  84                 dev_err(&hid->dev, "required output report is "
  85                                 "missing\n");
  86                 return -ENODEV;
  87         }
  88
  89         report = list_entry(report_ptr, struct hid_report, list);
  90         if (report->maxfield < 1) {
  91                 dev_err(&hid->dev, "no fields in the report\n");
  92                 return -ENODEV;
  93         }
  94
  95         if (report->field[0]->report_count < 3) {
  96                 dev_err(&hid->dev, "not enough values in the field\n");
  97                 return -ENODEV;
  98         }
  99
 100         sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
 101         if (!sjoyff)
 102                 return -ENOMEM;
 103
 104         dev = hidinput->input;
 105
 106         set_bit(FF_RUMBLE, dev->ffbit);
 107
 108         error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
 109         if (error) {
 110                 kfree(sjoyff);
 111                 return error;
 112         }
 113
 114         sjoyff->report = report;
 115         sjoyff->report->field[0]->value[0] = 0x01;
 116         sjoyff->report->field[0]->value[1] = 0x00;
 117         sjoyff->report->field[0]->value[2] = 0x00;
 118         usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
 119
 120         dev_info(&hid->dev,
 121                 "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
 122
 123         return 0;
 124 }
 125 #else
 126 static inline int sjoyff_init(struct hid_device *hid)
 127 {
 128         return 0;
 129 }
 130 #endif
 131
 132 static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
 133 {
 134         int ret;
 135
 136         ret = hid_parse(hdev);
 137         if (ret) {
 138                 dev_err(&hdev->dev, "parse failed\n");
 139                 goto err;
 140         }
 141
 142         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 143         if (ret) {
 144                 dev_err(&hdev->dev, "hw start failed\n");
 145                 goto err;
 146         }
 147
 148         sjoyff_init(hdev);
 149
 150         return 0;
 151 err:
 152         return ret;
 153 }
 154
 155 static const struct hid_device_id sjoy_devices[] = {
 156         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
 157         { }
 158 };
 159 MODULE_DEVICE_TABLE(hid, sjoy_devices);
 160
 161 static struct hid_driver sjoy_driver = {
 162         .name = "smartjoyplus",
 163         .id_table = sjoy_devices,
 164         .probe = sjoy_probe,
 165 };
 166
 167 static int __init sjoy_init(void)
 168 {
 169         return hid_register_driver(&sjoy_driver);
 170 }
 171
 172 static void __exit sjoy_exit(void)
 173 {
 174         hid_unregister_driver(&sjoy_driver);
 175 }
 176
 177 module_init(sjoy_init);
 178 module_exit(sjoy_exit);
 179 MODULE_LICENSE("GPL");
 180 MODULE_AUTHOR("Jussi Kivilinna");
 181