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drivers/hid/hid-lgff.c
4.9 KB
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/* |
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* Force feedback support for hid-compliant for some of the devices from * Logitech, namely: * - WingMan Cordless RumblePad * - WingMan Force 3D * * Copyright (c) 2002-2004 Johann Deneux |
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* Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com> |
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*/ /* * 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 * * Should you need to contact me, the author, you can do so by * e-mail - mail your message to <johann.deneux@it.uu.se> */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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 "usbhid/usbhid.h" #include "hid-lg.h" |
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struct dev_type { |
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u16 idVendor; u16 idProduct; |
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const signed short *ff; |
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}; |
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static const signed short ff_rumble[] = { |
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FF_RUMBLE, -1 }; |
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static const signed short ff_joystick[] = { |
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FF_CONSTANT, -1 }; |
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static const signed short ff_joystick_ac[] = { FF_CONSTANT, FF_AUTOCENTER, -1 }; |
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static const struct dev_type devices[] = { |
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{ 0x046d, 0xc211, ff_rumble }, { 0x046d, 0xc219, ff_rumble }, { 0x046d, 0xc283, ff_joystick }, |
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{ 0x046d, 0xc286, ff_joystick_ac }, |
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{ 0x046d, 0xc287, ff_joystick_ac }, |
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{ 0x046d, 0xc293, ff_joystick }, |
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{ 0x046d, 0xc295, ff_joystick }, |
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}; |
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static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { |
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struct hid_device *hid = input_get_drvdata(dev); |
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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, y; unsigned int left, right; #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 + 0x7f; /* 0x7f is center */ y = effect->u.ramp.end_level + 0x7f; CLAMP(x); CLAMP(y); report->field[0]->value[0] = 0x51; report->field[0]->value[1] = 0x08; report->field[0]->value[2] = x; report->field[0]->value[3] = y; |
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dbg_hid("(x, y)=(%04x, %04x) ", x, y); |
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usbhid_submit_report(hid, report, USB_DIR_OUT); |
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break; case FF_RUMBLE: right = effect->u.rumble.strong_magnitude; left = effect->u.rumble.weak_magnitude; right = right * 0xff / 0xffff; left = left * 0xff / 0xffff; CLAMP(left); CLAMP(right); report->field[0]->value[0] = 0x42; report->field[0]->value[1] = 0x00; report->field[0]->value[2] = left; report->field[0]->value[3] = right; |
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dbg_hid("(left, right)=(%04x, %04x) ", left, right); |
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usbhid_submit_report(hid, report, USB_DIR_OUT); |
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break; } return 0; } |
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static void hid_lgff_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); __s32 *value = report->field[0]->value; magnitude = (magnitude >> 12) & 0xf; *value++ = 0xfe; *value++ = 0x0d; *value++ = magnitude; /* clockwise strength */ *value++ = magnitude; /* counter-clockwise strength */ *value++ = 0x80; *value++ = 0x00; *value = 0x00; usbhid_submit_report(hid, report, USB_DIR_OUT); } |
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int lgff_init(struct hid_device* hid) |
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{ |
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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; |
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const signed short *ff_bits = ff_joystick; |
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int error; |
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int i; |
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/* Find the report to use */ |
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if (list_empty(report_list)) { |
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hid_err(hid, "No output report found "); |
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return -1; } |
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/* Check that the report looks ok */ |
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report = list_entry(report_list->next, struct hid_report, list); |
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field = report->field[0]; if (!field) { |
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hid_err(hid, "NULL field "); |
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return -1; } |
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for (i = 0; i < ARRAY_SIZE(devices); i++) { if (dev->id.vendor == devices[i].idVendor && dev->id.product == devices[i].idProduct) { |
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ff_bits = devices[i].ff; |
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break; |
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} |
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} |
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for (i = 0; ff_bits[i] >= 0; i++) set_bit(ff_bits[i], dev->ffbit); |
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error = input_ff_create_memless(dev, NULL, hid_lgff_play); if (error) return error; |
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if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) dev->ff->set_autocenter = hid_lgff_set_autocenter; |
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pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se> "); |
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return 0; } |