Initial import

1 files changed, 149 insertions, 0 deletions

diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c
new file mode 100644
index 000000000..c4ef3bc72
--- /dev/null
+++ b/drivers/hid/hid-cypress.c
@@ -0,0 +1,149 @@
+/*
+ *  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;
+
+	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;
+		}
+	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");