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                 hid_err(hid, "no output reports found\n");
  78                 return -ENODEV;
  79         }
  80
  81         report_ptr = report_ptr->next;
  82
  83         if (report_ptr == report_list) {
  84                 hid_err(hid, "required output report is missing\n");
  85                 return -ENODEV;
  86         }
  87
  88         report = list_entry(report_ptr, struct hid_report, list);
  89         if (report->maxfield < 1) {
  90                 hid_err(hid, "no fields in the report\n");
  91                 return -ENODEV;
  92         }
  93
  94         if (report->field[0]->report_count < 3) {
  95                 hid_err(hid, "not enough values in the field\n");
  96                 return -ENODEV;
  97         }
  98
  99         sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
 100         if (!sjoyff)
 101                 return -ENOMEM;
 102
 103         dev = hidinput->input;
 104
 105         set_bit(FF_RUMBLE, dev->ffbit);
 106
 107         error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
 108         if (error) {
 109                 kfree(sjoyff);
 110                 return error;
 111         }
 112
 113         sjoyff->report = report;
 114         sjoyff->report->field[0]->value[0] = 0x01;
 115         sjoyff->report->field[0]->value[1] = 0x00;
 116         sjoyff->report->field[0]->value[2] = 0x00;
 117         usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
 118
 119         hid_info(hid, "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
 120
 121         return 0;
 122 }
 123 #else
 124 static inline int sjoyff_init(struct hid_device *hid)
 125 {
 126         return 0;
 127 }
 128 #endif
 129
 130 static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
 131 {
 132         int ret;
 133
 134         ret = hid_parse(hdev);
 135         if (ret) {
 136                 hid_err(hdev, "parse failed\n");
 137                 goto err;
 138         }
 139
 140         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 141         if (ret) {
 142                 hid_err(hdev, "hw start failed\n");
 143                 goto err;
 144         }
 145
 146         sjoyff_init(hdev);
 147
 148         return 0;
 149 err:
 150         return ret;
 151 }
 152
 153 static const struct hid_device_id sjoy_devices[] = {
 154         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
 155         { }
 156 };
 157 MODULE_DEVICE_TABLE(hid, sjoy_devices);
 158
 159 static struct hid_driver sjoy_driver = {
 160         .name = "smartjoyplus",
 161         .id_table = sjoy_devices,
 162         .probe = sjoy_probe,
 163 };
 164
 165 static int __init sjoy_init(void)
 166 {
 167         return hid_register_driver(&sjoy_driver);
 168 }
 169
 170 static void __exit sjoy_exit(void)
 171 {
 172         hid_unregister_driver(&sjoy_driver);
 173 }
 174
 175 module_init(sjoy_init);
 176 module_exit(sjoy_exit);
 177 MODULE_LICENSE("GPL");
 178 MODULE_AUTHOR("Jussi Kivilinna");
 179