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- /*
- * HID driver for some cypress "special" devices
- *
- * Copyright (c) 1999 Andreas Gal
- * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
- * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
- * Copyright (c) 2006-2007 Jiri Kosina
- * Copyright (c) 2008 Jiri Slaby
- */
- /*
- * 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.
- */
- #include <linux/device.h>
- #include <linux/hid.h>
- #include <linux/input.h>
- #include <linux/module.h>
- #include "hid-ids.h"
- #define CP_RDESC_SWAPPED_MIN_MAX 0x01
- #define CP_2WHEEL_MOUSE_HACK 0x02
- #define CP_2WHEEL_MOUSE_HACK_ON 0x04
- /*
- * Some USB barcode readers from cypress have usage min and usage max in
- * the wrong order
- */
- static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int *rsize)
- {
- unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
- unsigned int i;
- if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
- return rdesc;
- if (*rsize < 4)
- return rdesc;
- for (i = 0; i < *rsize - 4; i++)
- if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
- rdesc[i] = 0x19;
- rdesc[i + 2] = 0x29;
- swap(rdesc[i + 3], rdesc[i + 1]);
- }
- return rdesc;
- }
- static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
- struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
- {
- unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
- if (!(quirks & CP_2WHEEL_MOUSE_HACK))
- return 0;
- if (usage->type == EV_REL && usage->code == REL_WHEEL)
- set_bit(REL_HWHEEL, *bit);
- if (usage->hid == 0x00090005)
- return -1;
- return 0;
- }
- static int cp_event(struct hid_device *hdev, struct hid_field *field,
- struct hid_usage *usage, __s32 value)
- {
- unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
- if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
- !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
- return 0;
- if (usage->hid == 0x00090005) {
- if (value)
- quirks |= CP_2WHEEL_MOUSE_HACK_ON;
- else
- quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
- hid_set_drvdata(hdev, (void *)quirks);
- return 1;
- }
- if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
- struct input_dev *input = field->hidinput->input;
- input_event(input, usage->type, REL_HWHEEL, value);
- return 1;
- }
- return 0;
- }
- static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
- {
- unsigned long quirks = id->driver_data;
- int ret;
- hid_set_drvdata(hdev, (void *)quirks);
- ret = hid_parse(hdev);
- if (ret) {
- hid_err(hdev, "parse failed\n");
- goto err_free;
- }
- ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
- if (ret) {
- hid_err(hdev, "hw start failed\n");
- goto err_free;
- }
- return 0;
- err_free:
- return ret;
- }
- static const struct hid_device_id cp_devices[] = {
- { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
- .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
- { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
- .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
- { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
- .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
- { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
- .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
- { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
- .driver_data = CP_2WHEEL_MOUSE_HACK },
- { }
- };
- MODULE_DEVICE_TABLE(hid, cp_devices);
- static struct hid_driver cp_driver = {
- .name = "cypress",
- .id_table = cp_devices,
- .report_fixup = cp_report_fixup,
- .input_mapped = cp_input_mapped,
- .event = cp_event,
- .probe = cp_probe,
- };
- module_hid_driver(cp_driver);
- MODULE_LICENSE("GPL");
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