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156 lines
4.0 KiB
156 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Force feedback support for hid-compliant for some of the devices from |
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* Logitech, namely: |
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* - WingMan Cordless RumblePad |
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* - WingMan Force 3D |
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* |
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* Copyright (c) 2002-2004 Johann Deneux |
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* Copyright (c) 2006 Anssi Hannula <[email protected]> |
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*/ |
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/* |
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* |
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* Should you need to contact me, the author, you can do so by |
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* e-mail - mail your message to <[email protected]> |
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*/ |
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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/hid.h> |
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#include "hid-lg.h" |
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struct dev_type { |
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u16 idVendor; |
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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, |
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-1 |
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}; |
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static const signed short ff_joystick[] = { |
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FF_CONSTANT, |
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-1 |
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}; |
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static const signed short ff_joystick_ac[] = { |
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FF_CONSTANT, |
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FF_AUTOCENTER, |
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-1 |
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}; |
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static const struct dev_type devices[] = { |
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{ 0x046d, 0xc211, ff_rumble }, |
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{ 0x046d, 0xc219, ff_rumble }, |
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{ 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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{ |
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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; |
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list); |
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int x, y; |
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unsigned int left, right; |
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#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff |
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switch (effect->type) { |
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case FF_CONSTANT: |
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x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */ |
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y = effect->u.ramp.end_level + 0x7f; |
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CLAMP(x); |
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CLAMP(y); |
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report->field[0]->value[0] = 0x51; |
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report->field[0]->value[1] = 0x08; |
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report->field[0]->value[2] = x; |
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report->field[0]->value[3] = y; |
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dbg_hid("(x, y)=(%04x, %04x)\n", x, y); |
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hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
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break; |
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case FF_RUMBLE: |
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right = effect->u.rumble.strong_magnitude; |
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left = effect->u.rumble.weak_magnitude; |
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right = right * 0xff / 0xffff; |
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left = left * 0xff / 0xffff; |
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CLAMP(left); |
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CLAMP(right); |
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report->field[0]->value[0] = 0x42; |
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report->field[0]->value[1] = 0x00; |
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report->field[0]->value[2] = left; |
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report->field[0]->value[3] = right; |
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dbg_hid("(left, right)=(%04x, %04x)\n", left, right); |
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hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
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break; |
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} |
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return 0; |
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} |
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static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude) |
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{ |
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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; |
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list); |
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__s32 *value = report->field[0]->value; |
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magnitude = (magnitude >> 12) & 0xf; |
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*value++ = 0xfe; |
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*value++ = 0x0d; |
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*value++ = magnitude; /* clockwise strength */ |
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*value++ = magnitude; /* counter-clockwise strength */ |
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*value++ = 0x80; |
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*value++ = 0x00; |
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*value = 0x00; |
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hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
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} |
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int lgff_init(struct hid_device* hid) |
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{ |
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struct hid_input *hidinput; |
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struct input_dev *dev; |
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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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if (list_empty(&hid->inputs)) { |
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hid_err(hid, "no inputs found\n"); |
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return -ENODEV; |
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} |
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hidinput = list_entry(hid->inputs.next, struct hid_input, list); |
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dev = hidinput->input; |
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/* Check that the report looks ok */ |
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if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7)) |
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return -ENODEV; |
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for (i = 0; i < ARRAY_SIZE(devices); i++) { |
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if (dev->id.vendor == devices[i].idVendor && |
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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++) |
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set_bit(ff_bits[i], dev->ffbit); |
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error = input_ff_create_memless(dev, NULL, hid_lgff_play); |
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if (error) |
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return error; |
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if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) |
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dev->ff->set_autocenter = hid_lgff_set_autocenter; |
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pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <[email protected]>\n"); |
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return 0; |
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}
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