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141 lines
3.0 KiB
141 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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*/ |
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/* |
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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/slab.h> |
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#include <linux/module.h> |
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#include "hid-ids.h" |
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#ifdef CONFIG_ZEROPLUS_FF |
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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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hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); |
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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; |
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struct input_dev *dev; |
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int i, error; |
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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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for (i = 0; i < 4; i++) { |
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report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); |
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if (!report) |
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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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hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); |
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hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <[email protected]>\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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hid_err(hdev, "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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hid_err(hdev, "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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module_hid_driver(zp_driver); |
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MODULE_LICENSE("GPL");
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