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1ebb711437
Make sure we have enough of a report structure to validate before looking at it. Reported-by: Benoit Camredon <benoit.camredon@airbus.com> Tested-by: Benoit Camredon <benoit.camredon@airbus.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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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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