2 * HID driver for Asus notebook built-in keyboard.
3 * Fixes small logical maximum to match usage maximum.
5 * Currently supported devices are:
9 * Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
11 * This module based on hid-ortek by
12 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
13 * Copyright (c) 2011 Jiri Kosina
15 * This module has been updated to add support for Asus i2c touchpad.
17 * Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
18 * Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
19 * Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
23 * This program is free software; you can redistribute it and/or modify it
24 * under the terms of the GNU General Public License as published by the Free
25 * Software Foundation; either version 2 of the License, or (at your option)
29 #include <linux/hid.h>
30 #include <linux/module.h>
31 #include <linux/input/mt.h>
35 MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
36 MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
37 MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
38 MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
39 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
41 #define FEATURE_REPORT_ID 0x0d
42 #define INPUT_REPORT_ID 0x5d
44 #define INPUT_REPORT_SIZE 28
46 #define MAX_CONTACTS 5
50 #define MAX_TOUCH_MAJOR 8
51 #define MAX_PRESSURE 128
53 #define CONTACT_DATA_SIZE 5
55 #define BTN_LEFT_MASK 0x01
56 #define CONTACT_TOOL_TYPE_MASK 0x80
57 #define CONTACT_X_MSB_MASK 0xf0
58 #define CONTACT_Y_MSB_MASK 0x0f
59 #define CONTACT_TOUCH_MAJOR_MASK 0x07
60 #define CONTACT_PRESSURE_MASK 0x7f
62 #define QUIRK_FIX_NOTEBOOK_REPORT BIT(0)
63 #define QUIRK_NO_INIT_REPORTS BIT(1)
64 #define QUIRK_SKIP_INPUT_MAPPING BIT(2)
65 #define QUIRK_IS_MULTITOUCH BIT(3)
67 #define NOTEBOOK_QUIRKS QUIRK_FIX_NOTEBOOK_REPORT
68 #define TOUCHPAD_QUIRKS (QUIRK_NO_INIT_REPORTS | \
69 QUIRK_SKIP_INPUT_MAPPING | \
72 #define TRKID_SGN ((TRKID_MAX + 1) >> 1)
76 struct input_dev *input;
79 static void asus_report_contact_down(struct input_dev *input,
80 int toolType, u8 *data)
82 int touch_major, pressure;
83 int x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
84 int y = MAX_Y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
86 if (toolType == MT_TOOL_PALM) {
87 touch_major = MAX_TOUCH_MAJOR;
88 pressure = MAX_PRESSURE;
90 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
91 pressure = data[4] & CONTACT_PRESSURE_MASK;
94 input_report_abs(input, ABS_MT_POSITION_X, x);
95 input_report_abs(input, ABS_MT_POSITION_Y, y);
96 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
97 input_report_abs(input, ABS_MT_PRESSURE, pressure);
100 /* Required for Synaptics Palm Detection */
101 static void asus_report_tool_width(struct input_dev *input)
103 struct input_mt *mt = input->mt;
104 struct input_mt_slot *oldest;
111 for (i = 0; i < mt->num_slots; ++i) {
112 struct input_mt_slot *ps = &mt->slots[i];
113 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
117 if ((id - oldid) & TRKID_SGN) {
125 input_report_abs(input, ABS_TOOL_WIDTH,
126 input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
130 static void asus_report_input(struct input_dev *input, u8 *data)
133 u8 *contactData = data + 2;
135 for (i = 0; i < MAX_CONTACTS; i++) {
136 bool down = !!(data[1] & BIT(i+3));
137 int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
138 MT_TOOL_PALM : MT_TOOL_FINGER;
140 input_mt_slot(input, i);
141 input_mt_report_slot_state(input, toolType, down);
144 asus_report_contact_down(input, toolType, contactData);
145 contactData += CONTACT_DATA_SIZE;
149 input_report_key(input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
150 asus_report_tool_width(input);
152 input_mt_sync_frame(input);
156 static int asus_raw_event(struct hid_device *hdev,
157 struct hid_report *report, u8 *data, int size)
159 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
161 if (drvdata->quirks & QUIRK_IS_MULTITOUCH &&
162 data[0] == INPUT_REPORT_ID &&
163 size == INPUT_REPORT_SIZE) {
164 asus_report_input(drvdata->input, data);
171 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
173 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
175 if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
177 struct input_dev *input = hi->input;
179 input_set_abs_params(input, ABS_MT_POSITION_X, 0, MAX_X, 0, 0);
180 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, MAX_Y, 0, 0);
181 input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
182 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
183 input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);
185 __set_bit(BTN_LEFT, input->keybit);
186 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
188 ret = input_mt_init_slots(input, MAX_CONTACTS, INPUT_MT_POINTER);
191 hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
195 drvdata->input = input;
201 static int asus_input_mapping(struct hid_device *hdev,
202 struct hid_input *hi, struct hid_field *field,
203 struct hid_usage *usage, unsigned long **bit,
206 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
208 if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
209 /* Don't map anything from the HID report.
210 * We do it all manually in asus_input_configured
218 static int asus_start_multitouch(struct hid_device *hdev)
221 const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
222 unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
226 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
230 ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
231 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
235 if (ret != sizeof(buf)) {
236 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
243 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
245 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
247 if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
248 return asus_start_multitouch(hdev);
253 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
256 struct asus_drvdata *drvdata;
258 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
259 if (drvdata == NULL) {
260 hid_err(hdev, "Can't alloc Asus descriptor\n");
264 hid_set_drvdata(hdev, drvdata);
266 drvdata->quirks = id->driver_data;
268 if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
269 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
271 ret = hid_parse(hdev);
273 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
277 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
279 hid_err(hdev, "Asus hw start failed: %d\n", ret);
283 if (!drvdata->input) {
284 hid_err(hdev, "Asus input not registered\n");
289 drvdata->input->name = "Asus TouchPad";
291 if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
292 ret = asus_start_multitouch(hdev);
303 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
306 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
308 if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
309 *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
310 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
316 static const struct hid_device_id asus_devices[] = {
317 { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
318 USB_DEVICE_ID_ASUSTEK_NOTEBOOK_KEYBOARD), NOTEBOOK_QUIRKS},
319 { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
320 USB_DEVICE_ID_ASUSTEK_TOUCHPAD), TOUCHPAD_QUIRKS },
323 MODULE_DEVICE_TABLE(hid, asus_devices);
325 static struct hid_driver asus_driver = {
327 .id_table = asus_devices,
328 .report_fixup = asus_report_fixup,
330 .input_mapping = asus_input_mapping,
331 .input_configured = asus_input_configured,
333 .reset_resume = asus_reset_resume,
335 .raw_event = asus_raw_event
337 module_hid_driver(asus_driver);
339 MODULE_LICENSE("GPL");