1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c
new file mode 100644
index 000000000000..a1e13f15f0a7
--- /dev/null
+++ b/drivers/hid/hid-cypress.c
@@ -0,0 +1,158 @@
+/*
+ *  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) 2007 Paul Walmsley
+ *  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 void 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;
+
+        for (i = 0; i < rsize - 4; i++)
+                if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
+                        __u8 tmp;
+
+                        rdesc[i] = 0x19;
+                        rdesc[i + 2] = 0x29;
+                        tmp = rdesc[i + 3];
+                        rdesc[i + 3] = rdesc[i + 1];
+                        rdesc[i + 1] = tmp;
+                }
+}
+
+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) {
+                dev_err(&hdev->dev, "parse failed\n");
+                goto err_free;
+        }
+
+        ret = hid_hw_start(hdev);
+        if (ret) {
+                dev_err(&hdev->dev, "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_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,
+};
+
+static int cp_init(void)
+{
+        return hid_register_driver(&cp_driver);
+}
+
+static void cp_exit(void)
+{
+        hid_unregister_driver(&cp_driver);
+}
+
+module_init(cp_init);
+module_exit(cp_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(cypress);