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![Jiri Kosina](/assets/img/avatar_default.png)
Currently, the hid-*ff force feedback drivers, which claim the blacklisted device on a HID bus, are only compiled in if the user selects force feedback support. However we want the device to be supported even when the kernel is configured without force feedback. This patch fixes the drivers in a way that they get compiled even if force feedback is turned off; all the force feedback support code is compiled out in such case, and the driver works as a usual driver on HID bus, claiming and initializing the device, making it operational without FF effects. Reported-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/*
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* Force feedback support for GreenAsia (Product ID 0x12) based devices
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*
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* The devices are distributed under various names and the same USB device ID
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* can be used in many game controllers.
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*
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*
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* 0e8f:0012 "GreenAsia Inc. USB Joystick "
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* - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
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*
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* Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "hid-ids.h"
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#ifdef CONFIG_GREENASIA_FF
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#include "usbhid/usbhid.h"
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struct gaff_device {
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struct hid_report *report;
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};
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static int hid_gaff_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct gaff_device *gaff = data;
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int left, right;
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left = effect->u.rumble.strong_magnitude;
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right = effect->u.rumble.weak_magnitude;
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dbg_hid("called with 0x%04x 0x%04x", left, right);
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left = left * 0xfe / 0xffff;
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right = right * 0xfe / 0xffff;
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gaff->report->field[0]->value[0] = 0x51;
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gaff->report->field[0]->value[1] = 0x0;
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gaff->report->field[0]->value[2] = right;
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gaff->report->field[0]->value[3] = 0;
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gaff->report->field[0]->value[4] = left;
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gaff->report->field[0]->value[5] = 0;
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dbg_hid("running with 0x%02x 0x%02x", left, right);
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usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
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gaff->report->field[0]->value[0] = 0xfa;
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gaff->report->field[0]->value[1] = 0xfe;
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gaff->report->field[0]->value[2] = 0x0;
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gaff->report->field[0]->value[4] = 0x0;
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usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
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return 0;
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}
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static int gaff_init(struct hid_device *hid)
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{
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struct gaff_device *gaff;
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struct hid_report *report;
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struct hid_input *hidinput = list_entry(hid->inputs.next,
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struct hid_input, list);
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struct list_head *report_list =
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&hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct list_head *report_ptr = report_list;
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struct input_dev *dev = hidinput->input;
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int error;
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if (list_empty(report_list)) {
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dev_err(&hid->dev, "no output reports found\n");
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return -ENODEV;
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}
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report_ptr = report_ptr->next;
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report = list_entry(report_ptr, struct hid_report, list);
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if (report->maxfield < 1) {
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dev_err(&hid->dev, "no fields in the report\n");
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return -ENODEV;
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}
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if (report->field[0]->report_count < 6) {
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dev_err(&hid->dev, "not enough values in the field\n");
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return -ENODEV;
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}
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gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
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if (!gaff)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, gaff, hid_gaff_play);
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if (error) {
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kfree(gaff);
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return error;
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}
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gaff->report = report;
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gaff->report->field[0]->value[0] = 0x51;
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gaff->report->field[0]->value[1] = 0x00;
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gaff->report->field[0]->value[2] = 0x00;
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gaff->report->field[0]->value[3] = 0x00;
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usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
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gaff->report->field[0]->value[0] = 0xfa;
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gaff->report->field[0]->value[1] = 0xfe;
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usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
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dev_info(&hid->dev, "Force Feedback for GreenAsia 0x12"
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" devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
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return 0;
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}
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#else
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static inline int gaff_init(struct hid_device *hdev)
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{
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return 0;
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}
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#endif
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static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
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ret = hid_parse(hdev);
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if (ret) {
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dev_err(&hdev->dev, "parse failed\n");
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goto err;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
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if (ret) {
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dev_err(&hdev->dev, "hw start failed\n");
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goto err;
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}
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gaff_init(hdev);
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return 0;
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err:
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return ret;
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}
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static const struct hid_device_id ga_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, ga_devices);
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static struct hid_driver ga_driver = {
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.name = "greenasia",
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.id_table = ga_devices,
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.probe = ga_probe,
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};
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static int __init ga_init(void)
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{
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return hid_register_driver(&ga_driver);
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}
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static void __exit ga_exit(void)
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{
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hid_unregister_driver(&ga_driver);
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}
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module_init(ga_init);
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module_exit(ga_exit);
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MODULE_LICENSE("GPL");
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