LXR linux/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
  38struct sjoyff_device {
  39        struct hid_report *report;
  40};
  41
  42static 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
  64static 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
 124static inline int sjoyff_init(struct hid_device *hid)
 125{
 126        return 0;
 127}
 128#endif
 129
 130static 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;
 149err:
 150        return ret;
 151}
 152
 153static const struct hid_device_id sjoy_devices[] = {
 154        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
 155        { }
 156};
 157MODULE_DEVICE_TABLE(hid, sjoy_devices);
 158
 159static struct hid_driver sjoy_driver = {
 160        .name = "smartjoyplus",
 161        .id_table = sjoy_devices,
 162        .probe = sjoy_probe,
 163};
 164
 165static int __init sjoy_init(void)
 166{
 167        return hid_register_driver(&sjoy_driver);
 168}
 169
 170static void __exit sjoy_exit(void)
 171{
 172        hid_unregister_driver(&sjoy_driver);
 173}
 174
 175module_init(sjoy_init);
 176module_exit(sjoy_exit);
 177MODULE_LICENSE("GPL");
 178MODULE_AUTHOR("Jussi Kivilinna");
 179
 180