| /* |
| * Force feedback support for Logitech Speed Force Wireless |
| * |
| * http://wiibrew.org/wiki/Logitech_USB_steering_wheel |
| * |
| * Copyright (c) 2010 Simon Wood <simon@mungewell.org> |
| */ |
| |
| /* |
| * 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 |
| */ |
| |
| |
| #include <linux/input.h> |
| #include <linux/usb.h> |
| #include <linux/hid.h> |
| |
| #include "usbhid/usbhid.h" |
| #include "hid-lg.h" |
| #include "hid-ids.h" |
| |
| static const signed short lg4ff_wheel_effects[] = { |
| FF_CONSTANT, |
| FF_AUTOCENTER, |
| -1 |
| }; |
| |
| struct lg4ff_wheel { |
| const __u32 product_id; |
| const signed short *ff_effects; |
| const __u16 min_range; |
| const __u16 max_range; |
| }; |
| |
| static const struct lg4ff_wheel lg4ff_devices[] = { |
| {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270}, |
| {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270}, |
| {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900}, |
| {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900}, |
| {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900}, |
| {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900}, |
| {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270}, |
| {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270} |
| }; |
| |
| static int hid_lg4ff_play(struct input_dev *dev, void *data, |
| struct ff_effect *effect) |
| { |
| struct hid_device *hid = input_get_drvdata(dev); |
| struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; |
| struct hid_report *report = list_entry(report_list->next, struct hid_report, list); |
| int x; |
| |
| #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff |
| |
| switch (effect->type) { |
| case FF_CONSTANT: |
| x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */ |
| CLAMP(x); |
| report->field[0]->value[0] = 0x11; /* Slot 1 */ |
| report->field[0]->value[1] = 0x08; |
| report->field[0]->value[2] = x; |
| report->field[0]->value[3] = 0x80; |
| report->field[0]->value[4] = 0x00; |
| report->field[0]->value[5] = 0x00; |
| report->field[0]->value[6] = 0x00; |
| |
| usbhid_submit_report(hid, report, USB_DIR_OUT); |
| break; |
| } |
| return 0; |
| } |
| |
| static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude) |
| { |
| struct hid_device *hid = input_get_drvdata(dev); |
| struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; |
| struct hid_report *report = list_entry(report_list->next, struct hid_report, list); |
| |
| report->field[0]->value[0] = 0xfe; |
| report->field[0]->value[1] = 0x0d; |
| report->field[0]->value[2] = magnitude >> 13; |
| report->field[0]->value[3] = magnitude >> 13; |
| report->field[0]->value[4] = magnitude >> 8; |
| report->field[0]->value[5] = 0x00; |
| report->field[0]->value[6] = 0x00; |
| |
| usbhid_submit_report(hid, report, USB_DIR_OUT); |
| } |
| |
| |
| int lg4ff_init(struct hid_device *hid) |
| { |
| struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); |
| struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; |
| struct input_dev *dev = hidinput->input; |
| struct hid_report *report; |
| struct hid_field *field; |
| int error, i, j; |
| |
| /* Find the report to use */ |
| if (list_empty(report_list)) { |
| hid_err(hid, "No output report found\n"); |
| return -1; |
| } |
| |
| /* Check that the report looks ok */ |
| report = list_entry(report_list->next, struct hid_report, list); |
| if (!report) { |
| hid_err(hid, "NULL output report\n"); |
| return -1; |
| } |
| |
| field = report->field[0]; |
| if (!field) { |
| hid_err(hid, "NULL field\n"); |
| return -1; |
| } |
| |
| /* Check what wheel has been connected */ |
| for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { |
| if (hid->product == lg4ff_devices[i].product_id) { |
| dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id); |
| break; |
| } |
| } |
| |
| if (i == ARRAY_SIZE(lg4ff_devices)) { |
| hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to" |
| "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n"); |
| return -1; |
| } |
| |
| /* Set supported force feedback capabilities */ |
| for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++) |
| set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit); |
| |
| error = input_ff_create_memless(dev, NULL, hid_lg4ff_play); |
| |
| if (error) |
| return error; |
| |
| if (test_bit(FF_AUTOCENTER, dev->ffbit)) |
| dev->ff->set_autocenter = hid_lg4ff_set_autocenter; |
| |
| hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n"); |
| return 0; |
| } |
| |