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-rw-r--r--drivers/hid/hid-wacom.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
new file mode 100644
index 0000000..1f9237f
--- /dev/null
+++ b/drivers/hid/hid-wacom.c
@@ -0,0 +1,259 @@
+/*
+ * Bluetooth Wacom Tablet support
+ *
+ * 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 <jirislaby@gmail.com>
+ * Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
+ * Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
+ */
+
+/*
+ * 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/module.h>
+
+#include "hid-ids.h"
+
+struct wacom_data {
+ __u16 tool;
+ unsigned char butstate;
+};
+
+static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
+ u8 *raw_data, int size)
+{
+ struct wacom_data *wdata = hid_get_drvdata(hdev);
+ struct hid_input *hidinput;
+ struct input_dev *input;
+ unsigned char *data = (unsigned char *) raw_data;
+ int tool, x, y, rw;
+
+ if (!(hdev->claimed & HID_CLAIMED_INPUT))
+ return 0;
+
+ tool = 0;
+ hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
+ input = hidinput->input;
+
+ /* Check if this is a tablet report */
+ if (data[0] != 0x03)
+ return 0;
+
+ /* Get X & Y positions */
+ x = le16_to_cpu(*(__le16 *) &data[2]);
+ y = le16_to_cpu(*(__le16 *) &data[4]);
+
+ /* Get current tool identifier */
+ if (data[1] & 0x90) { /* If pen is in the in/active area */
+ switch ((data[1] >> 5) & 3) {
+ case 0: /* Pen */
+ tool = BTN_TOOL_PEN;
+ break;
+
+ case 1: /* Rubber */
+ tool = BTN_TOOL_RUBBER;
+ break;
+
+ case 2: /* Mouse with wheel */
+ case 3: /* Mouse without wheel */
+ tool = BTN_TOOL_MOUSE;
+ break;
+ }
+
+ /* Reset tool if out of active tablet area */
+ if (!(data[1] & 0x10))
+ tool = 0;
+ }
+
+ /* If tool changed, notify input subsystem */
+ if (wdata->tool != tool) {
+ if (wdata->tool) {
+ /* Completely reset old tool state */
+ if (wdata->tool == BTN_TOOL_MOUSE) {
+ input_report_key(input, BTN_LEFT, 0);
+ input_report_key(input, BTN_RIGHT, 0);
+ input_report_key(input, BTN_MIDDLE, 0);
+ input_report_abs(input, ABS_DISTANCE,
+ input->absmax[ABS_DISTANCE]);
+ } else {
+ input_report_key(input, BTN_TOUCH, 0);
+ input_report_key(input, BTN_STYLUS, 0);
+ input_report_key(input, BTN_STYLUS2, 0);
+ input_report_abs(input, ABS_PRESSURE, 0);
+ }
+ input_report_key(input, wdata->tool, 0);
+ input_sync(input);
+ }
+ wdata->tool = tool;
+ if (tool)
+ input_report_key(input, tool, 1);
+ }
+
+ if (tool) {
+ input_report_abs(input, ABS_X, x);
+ input_report_abs(input, ABS_Y, y);
+
+ switch ((data[1] >> 5) & 3) {
+ case 2: /* Mouse with wheel */
+ input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
+ rw = (data[6] & 0x01) ? -1 :
+ (data[6] & 0x02) ? 1 : 0;
+ input_report_rel(input, REL_WHEEL, rw);
+ /* fall through */
+
+ case 3: /* Mouse without wheel */
+ input_report_key(input, BTN_LEFT, data[1] & 0x01);
+ input_report_key(input, BTN_RIGHT, data[1] & 0x02);
+ /* Compute distance between mouse and tablet */
+ rw = 44 - (data[6] >> 2);
+ if (rw < 0)
+ rw = 0;
+ else if (rw > 31)
+ rw = 31;
+ input_report_abs(input, ABS_DISTANCE, rw);
+ break;
+
+ default:
+ input_report_abs(input, ABS_PRESSURE,
+ data[6] | (((__u16) (data[1] & 0x08)) << 5));
+ input_report_key(input, BTN_TOUCH, data[1] & 0x01);
+ input_report_key(input, BTN_STYLUS, data[1] & 0x02);
+ input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
+ break;
+ }
+
+ input_sync(input);
+ }
+
+ /* Report the state of the two buttons at the top of the tablet
+ * as two extra fingerpad keys (buttons 4 & 5). */
+ rw = data[7] & 0x03;
+ if (rw != wdata->butstate) {
+ wdata->butstate = rw;
+ input_report_key(input, BTN_0, rw & 0x02);
+ input_report_key(input, BTN_1, rw & 0x01);
+ input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
+ input_sync(input);
+ }
+
+ return 1;
+}
+
+static int wacom_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ struct hid_input *hidinput;
+ struct input_dev *input;
+ struct wacom_data *wdata;
+ int ret;
+
+ wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
+ if (wdata == NULL) {
+ dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
+ return -ENOMEM;
+ }
+
+ hid_set_drvdata(hdev, wdata);
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ dev_err(&hdev->dev, "parse failed\n");
+ goto err_free;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ dev_err(&hdev->dev, "hw start failed\n");
+ goto err_free;
+ }
+
+ hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
+ input = hidinput->input;
+
+ /* Basics */
+ input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
+ input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
+ BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
+ input->relbit[0] |= BIT(REL_WHEEL);
+ set_bit(BTN_TOOL_PEN, input->keybit);
+ set_bit(BTN_TOUCH, input->keybit);
+ set_bit(BTN_STYLUS, input->keybit);
+ set_bit(BTN_STYLUS2, input->keybit);
+ set_bit(BTN_LEFT, input->keybit);
+ set_bit(BTN_RIGHT, input->keybit);
+ set_bit(BTN_MIDDLE, input->keybit);
+
+ /* Pad */
+ input->evbit[0] |= BIT(EV_MSC);
+ input->mscbit[0] |= BIT(MSC_SERIAL);
+
+ /* Distance, rubber and mouse */
+ input->absbit[0] |= BIT(ABS_DISTANCE);
+ set_bit(BTN_TOOL_RUBBER, input->keybit);
+ set_bit(BTN_TOOL_MOUSE, input->keybit);
+
+ input->absmax[ABS_PRESSURE] = 511;
+ input->absmax[ABS_DISTANCE] = 32;
+
+ input->absmax[ABS_X] = 16704;
+ input->absmax[ABS_Y] = 12064;
+ input->absfuzz[ABS_X] = 4;
+ input->absfuzz[ABS_Y] = 4;
+
+ return 0;
+err_free:
+ kfree(wdata);
+ return ret;
+}
+
+static void wacom_remove(struct hid_device *hdev)
+{
+ hid_hw_stop(hdev);
+ kfree(hid_get_drvdata(hdev));
+}
+
+static const struct hid_device_id wacom_devices[] = {
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
+
+ { }
+};
+MODULE_DEVICE_TABLE(hid, wacom_devices);
+
+static struct hid_driver wacom_driver = {
+ .name = "wacom",
+ .id_table = wacom_devices,
+ .probe = wacom_probe,
+ .remove = wacom_remove,
+ .raw_event = wacom_raw_event,
+};
+
+static int wacom_init(void)
+{
+ int ret;
+
+ ret = hid_register_driver(&wacom_driver);
+ if (ret)
+ printk(KERN_ERR "can't register wacom driver\n");
+ printk(KERN_ERR "wacom driver registered\n");
+ return ret;
+}
+
+static void wacom_exit(void)
+{
+ hid_unregister_driver(&wacom_driver);
+}
+
+module_init(wacom_init);
+module_exit(wacom_exit);
+MODULE_LICENSE("GPL");
+
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