/*
   *  Force feedback support for SmartJoy PLUS PS2->USB adapter
   *
   *  Copyright (c) 2009 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
   *
   *  Based of hid-pl.c and hid-gaff.c
   *   Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
   *   Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
   */
  
  /*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  
  /* #define DEBUG */
  
  #include <linux/input.h>

  #include <linux/slab.h>

  #include <linux/usb.h>
  #include <linux/hid.h>

  #include <linux/module.h>

  #include "hid-ids.h"
  
  #ifdef CONFIG_SMARTJOYPLUS_FF
  #include "usbhid/usbhid.h"
  
  struct sjoyff_device {
  	struct hid_report *report;
  };
  
  static int hid_sjoyff_play(struct input_dev *dev, void *data,
  			 struct ff_effect *effect)
  {
  	struct hid_device *hid = input_get_drvdata(dev);
  	struct sjoyff_device *sjoyff = data;
  	u32 left, right;
  
  	left = effect->u.rumble.strong_magnitude;
  	right = effect->u.rumble.weak_magnitude;
  	dev_dbg(&dev->dev, "called with 0x%08x 0x%08x
  ", left, right);
  
  	left = left * 0xff / 0xffff;
  	right = (right != 0); /* on/off only */
  
  	sjoyff->report->field[0]->value[1] = right;
  	sjoyff->report->field[0]->value[2] = left;
  	dev_dbg(&dev->dev, "running with 0x%02x 0x%02x
  ", left, right);
  	usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
  
  	return 0;
  }
  
  static int sjoyff_init(struct hid_device *hid)
  {
  	struct sjoyff_device *sjoyff;
  	struct hid_report *report;

  	struct hid_input *hidinput;

  	struct list_head *report_list =
  			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
  	struct list_head *report_ptr = report_list;
  	struct input_dev *dev;
  	int error;
  
  	if (list_empty(report_list)) {

  		hid_err(hid, "no output reports found
  ");

  		return -ENODEV;
  	}

  	list_for_each_entry(hidinput, &hid->inputs, list) {
  		report_ptr = report_ptr->next;

  		if (report_ptr == report_list) {
  			hid_err(hid, "required output report is missing
  ");
  			return -ENODEV;
  		}

  		report = list_entry(report_ptr, struct hid_report, list);
  		if (report->maxfield < 1) {
  			hid_err(hid, "no fields in the report
  ");
  			return -ENODEV;
  		}

  		if (report->field[0]->report_count < 3) {
  			hid_err(hid, "not enough values in the field
  ");
  			return -ENODEV;
  		}

  		sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
  		if (!sjoyff)
  			return -ENOMEM;

  		dev = hidinput->input;

  		set_bit(FF_RUMBLE, dev->ffbit);

  		error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
  		if (error) {
  			kfree(sjoyff);
  			return error;
  		}

  		sjoyff->report = report;
  		sjoyff->report->field[0]->value[0] = 0x01;
  		sjoyff->report->field[0]->value[1] = 0x00;
  		sjoyff->report->field[0]->value[2] = 0x00;
  		usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
  	}

  	hid_info(hid, "Force feedback for SmartJoy PLUS PS2/USB adapter
  ");

  
  	return 0;
  }
  #else
  static inline int sjoyff_init(struct hid_device *hid)
  {
  	return 0;
  }
  #endif
  
  static int sjoy_probe(struct hid_device *hdev, const struct hid_device_id *id)
  {
  	int ret;

  	hdev->quirks |= id->driver_data;

  	ret = hid_parse(hdev);
  	if (ret) {

  		hid_err(hdev, "parse failed
  ");

  		goto err;
  	}
  
  	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
  	if (ret) {

  		hid_err(hdev, "hw start failed
  ");

  		goto err;
  	}
  
  	sjoyff_init(hdev);
  
  	return 0;
  err:
  	return ret;
  }
  
  static const struct hid_device_id sjoy_devices[] = {

  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_3_PRO) },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_DUAL_BOX_PRO),
  		.driver_data = HID_QUIRK_MULTI_INPUT | HID_QUIRK_NOGET |
  			       HID_QUIRK_SKIP_OUTPUT_REPORTS },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_5_PRO),
  		.driver_data = HID_QUIRK_MULTI_INPUT | HID_QUIRK_NOGET |
  			       HID_QUIRK_SKIP_OUTPUT_REPORTS },

  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },

  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD),
  		.driver_data = HID_QUIRK_MULTI_INPUT | HID_QUIRK_NOGET |
  			       HID_QUIRK_SKIP_OUTPUT_REPORTS },

  	{ }
  };
  MODULE_DEVICE_TABLE(hid, sjoy_devices);
  
  static struct hid_driver sjoy_driver = {
  	.name = "smartjoyplus",
  	.id_table = sjoy_devices,
  	.probe = sjoy_probe,
  };

  static int __init sjoy_init(void)

  {
  	return hid_register_driver(&sjoy_driver);
  }

  static void __exit sjoy_exit(void)

  {
  	hid_unregister_driver(&sjoy_driver);
  }
  
  module_init(sjoy_init);
  module_exit(sjoy_exit);
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Jussi Kivilinna");