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2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for some cypress "special" devices
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2006-2007 Jiri Kosina
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* Copyright (c) 2008 Jiri Slaby
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*/
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/*
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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#define CP_RDESC_SWAPPED_MIN_MAX 0x01
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#define CP_2WHEEL_MOUSE_HACK 0x02
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#define CP_2WHEEL_MOUSE_HACK_ON 0x04
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/*
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* Some USB barcode readers from cypress have usage min and usage max in
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* the wrong order
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*/
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static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
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unsigned int i;
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if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
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return rdesc;
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if (*rsize < 4)
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return rdesc;
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for (i = 0; i < *rsize - 4; i++)
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if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
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rdesc[i] = 0x19;
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rdesc[i + 2] = 0x29;
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swap(rdesc[i + 3], rdesc[i + 1]);
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}
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return rdesc;
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}
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static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
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if (!(quirks & CP_2WHEEL_MOUSE_HACK))
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return 0;
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if (usage->type == EV_REL && usage->code == REL_WHEEL)
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set_bit(REL_HWHEEL, *bit);
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if (usage->hid == 0x00090005)
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return -1;
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return 0;
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}
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static int cp_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
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!usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
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return 0;
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if (usage->hid == 0x00090005) {
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if (value)
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quirks |= CP_2WHEEL_MOUSE_HACK_ON;
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else
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quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
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hid_set_drvdata(hdev, (void *)quirks);
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return 1;
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}
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if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
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struct input_dev *input = field->hidinput->input;
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input_event(input, usage->type, REL_HWHEEL, value);
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return 1;
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}
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return 0;
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}
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static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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unsigned long quirks = id->driver_data;
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int ret;
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hid_set_drvdata(hdev, (void *)quirks);
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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_free;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret) {
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hid_err(hdev, "hw start failed\n");
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goto err_free;
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}
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return 0;
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err_free:
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return ret;
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}
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static const struct hid_device_id cp_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
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.driver_data = CP_2WHEEL_MOUSE_HACK },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, cp_devices);
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static struct hid_driver cp_driver = {
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.name = "cypress",
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.id_table = cp_devices,
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.report_fixup = cp_report_fixup,
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.input_mapped = cp_input_mapped,
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.event = cp_event,
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.probe = cp_probe,
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};
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module_hid_driver(cp_driver);
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MODULE_LICENSE("GPL");
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