0f6f4319a7
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>
168 lines
4 KiB
C
168 lines
4 KiB
C
/*
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* Force feedback support for Zeroplus based devices
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*
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* Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
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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/hid.h>
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#include <linux/input.h>
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#include <linux/usb.h>
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#include "hid-ids.h"
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#ifdef CONFIG_ZEROPLUS_FF
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#include "usbhid/usbhid.h"
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struct zpff_device {
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struct hid_report *report;
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};
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static int zpff_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 zpff_device *zpff = data;
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int left, right;
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/*
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* The following is specified the other way around in the Zeroplus
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* datasheet but the order below is correct for the XFX Executioner;
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* however it is possible that the XFX Executioner is an exception
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*/
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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\n", left, right);
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left = left * 0x7f / 0xffff;
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right = right * 0x7f / 0xffff;
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zpff->report->field[2]->value[0] = left;
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zpff->report->field[3]->value[0] = right;
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dbg_hid("running with 0x%02x 0x%02x\n", left, right);
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usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
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return 0;
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}
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static int zpff_init(struct hid_device *hid)
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{
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struct zpff_device *zpff;
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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 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 report found\n");
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return -ENODEV;
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}
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report = list_entry(report_list->next, struct hid_report, list);
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if (report->maxfield < 4) {
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dev_err(&hid->dev, "not enough fields in report\n");
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return -ENODEV;
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}
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zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
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if (!zpff)
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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, zpff, zpff_play);
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if (error) {
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kfree(zpff);
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return error;
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}
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zpff->report = report;
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zpff->report->field[0]->value[0] = 0x00;
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zpff->report->field[1]->value[0] = 0x02;
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zpff->report->field[2]->value[0] = 0x00;
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zpff->report->field[3]->value[0] = 0x00;
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usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
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dev_info(&hid->dev, "force feedback for Zeroplus based devices by "
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"Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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#else
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static inline int zpff_init(struct hid_device *hid)
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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 zp_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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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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zpff_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 zp_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, zp_devices);
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static struct hid_driver zp_driver = {
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.name = "zeroplus",
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.id_table = zp_devices,
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.probe = zp_probe,
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};
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static int zp_init(void)
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{
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return hid_register_driver(&zp_driver);
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}
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static void zp_exit(void)
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{
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hid_unregister_driver(&zp_driver);
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}
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module_init(zp_init);
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module_exit(zp_exit);
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MODULE_LICENSE("GPL");
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