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/usb.h>
  31#include <linux/hid.h>
  32#include "hid-ids.h"
  33
  34#ifdef CONFIG_SMARTJOYPLUS_FF
  35#include "usbhid/usbhid.h"
  36
  37struct sjoyff_device {
  38        struct hid_report *report;
  39};
  40
  41static int hid_sjoyff_play(struct input_dev *dev, void *data,
  42                         struct ff_effect *effect)
  43{
  44        struct hid_device *hid = input_get_drvdata(dev);
  45        struct sjoyff_device *sjoyff = data;
  46        u32 left, right;
  47
  48        left = effect->u.rumble.strong_magnitude;
  49        right = effect->u.rumble.weak_magnitude;
  50        dev_dbg(&dev->dev, "called with 0x%08x 0x%08x\n", left, right);
  51
  52        left = left * 0xff / 0xffff;
  53        right = (right != 0); /* on/off only */
  54
  55        sjoyff->report->field[0]->value[1] = right;
  56        sjoyff->report->field[0]->value[2] = left;
  57        dev_dbg(&dev->dev, "running with 0x%02x 0x%02x\n", left, right);
  58        usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
  59
  60        return 0;
  61}
  62
  63static int sjoyff_init(struct hid_device *hid)
  64{
  65        struct sjoyff_device *sjoyff;
  66        struct hid_report *report;
  67        struct hid_input *hidinput = list_entry(hid->inputs.next,
  68                                                struct hid_input, list);
  69        struct list_head *report_list =
  70                        &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  71        struct list_head *report_ptr = report_list;
  72        struct input_dev *dev;
  73        int error;
  74
  75        if (list_empty(report_list)) {
  76                dev_err(&hid->dev, "no output reports found\n");
  77                return -ENODEV;
  78        }
  79
  80        report_ptr = report_ptr->next;
  81
  82        if (report_ptr == report_list) {
  83                dev_err(&hid->dev, "required output report is "
  84                                "missing\n");
  85                return -ENODEV;
  86        }
  87
  88        report = list_entry(report_ptr, struct hid_report, list);
  89        if (report->maxfield < 1) {
  90                dev_err(&hid->dev, "no fields in the report\n");
  91                return -ENODEV;
  92        }
  93
  94        if (report->field[0]->report_count < 3) {
  95                dev_err(&hid->dev, "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        dev_info(&hid->dev,
 120                "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
 121
 122        return 0;
 123}
 124#else
 125static inline int sjoyff_init(struct hid_device *hid)
 126{
 127        return 0;
 128}
 129#endif
 130
 131static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
 132{
 133        int ret;
 134
 135        ret = hid_parse(hdev);
 136        if (ret) {
 137                dev_err(&hdev->dev, "parse failed\n");
 138                goto err;
 139        }
 140
 141        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 142        if (ret) {
 143                dev_err(&hdev->dev, "hw start failed\n");
 144                goto err;
 145        }
 146
 147        sjoyff_init(hdev);
 148
 149        return 0;
 150err:
 151        return ret;
 152}
 153
 154static const struct hid_device_id sjoy_devices[] = {
 155        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
 156        { }
 157};
 158MODULE_DEVICE_TABLE(hid, sjoy_devices);
 159
 160static struct hid_driver sjoy_driver = {
 161        .name = "smartjoyplus",
 162        .id_table = sjoy_devices,
 163        .probe = sjoy_probe,
 164};
 165
 166static int __init sjoy_init(void)
 167{
 168        return hid_register_driver(&sjoy_driver);
 169}
 170
 171static void __exit sjoy_exit(void)
 172{
 173        hid_unregister_driver(&sjoy_driver);
 174}
 175
 176module_init(sjoy_init);
 177module_exit(sjoy_exit);
 178MODULE_LICENSE("GPL");
 179MODULE_AUTHOR("Jussi Kivilinna");
 180
 181