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@@ -0,0 +1,158 @@
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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) 2007 Paul Walmsley
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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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+ * 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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+
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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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+
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+#include "hid-ids.h"
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+
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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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+/*
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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 void 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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+
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+ if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
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+ return;
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+
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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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+ __u8 tmp;
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+
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+ rdesc[i] = 0x19;
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+ rdesc[i + 2] = 0x29;
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+ tmp = rdesc[i + 3];
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+ rdesc[i + 3] = rdesc[i + 1];
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+ rdesc[i + 1] = tmp;
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+ }
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+}
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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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+
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+ if (!(quirks & CP_2WHEEL_MOUSE_HACK))
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+ return 0;
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+
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return 0;
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+}
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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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+
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+ hid_set_drvdata(hdev, (void *)quirks);
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+
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+ ret = hid_parse(hdev);
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+ if (ret) {
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+ dev_err(&hdev->dev, "parse failed\n");
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+ goto err_free;
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+ }
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+
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+ ret = hid_hw_start(hdev);
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+ if (ret) {
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+ dev_err(&hdev->dev, "hw start failed\n");
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+ goto err_free;
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+ }
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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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+
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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_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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+
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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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+
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+static int cp_init(void)
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+{
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+ return hid_register_driver(&cp_driver);
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+}
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+
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+static void cp_exit(void)
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+{
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+ hid_unregister_driver(&cp_driver);
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+}
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+
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+module_init(cp_init);
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+module_exit(cp_exit);
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+MODULE_LICENSE("GPL");
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+
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+HID_COMPAT_LOAD_DRIVER(cypress);
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Jiri Slaby