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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[mirror_ubuntu-artful-kernel.git] / drivers / hid / hid-asus.c
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eeb01a57 1/*
b94f7d5d 2 * HID driver for Asus notebook built-in keyboard.
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3 * Fixes small logical maximum to match usage maximum.
4 *
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5 * Currently supported devices are:
6 * EeeBook X205TA
7 * VivoBook E200HA
8 *
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9 * Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
10 *
11 * This module based on hid-ortek by
12 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
13 * Copyright (c) 2011 Jiri Kosina
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14 *
15 * This module has been updated to add support for Asus i2c touchpad.
16 *
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>
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20 */
21
22/*
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)
26 * any later version.
27 */
28
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29#include <linux/hid.h>
30#include <linux/module.h>
9ce12d8b 31#include <linux/input/mt.h>
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32
33#include "hid-ids.h"
34
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35MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
36MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
37MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
38MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
39MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
40
41#define FEATURE_REPORT_ID 0x0d
42#define INPUT_REPORT_ID 0x5d
43
44#define INPUT_REPORT_SIZE 28
45
46#define MAX_CONTACTS 5
47
48#define MAX_X 2794
49#define MAX_Y 1758
50#define MAX_TOUCH_MAJOR 8
51#define MAX_PRESSURE 128
52
53#define CONTACT_DATA_SIZE 5
54
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
61
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)
66
67#define NOTEBOOK_QUIRKS QUIRK_FIX_NOTEBOOK_REPORT
68#define TOUCHPAD_QUIRKS (QUIRK_NO_INIT_REPORTS | \
69 QUIRK_SKIP_INPUT_MAPPING | \
70 QUIRK_IS_MULTITOUCH)
71
72#define TRKID_SGN ((TRKID_MAX + 1) >> 1)
73
74struct asus_drvdata {
75 unsigned long quirks;
76 struct input_dev *input;
77};
78
79static void asus_report_contact_down(struct input_dev *input,
80 int toolType, u8 *data)
81{
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]);
85
86 if (toolType == MT_TOOL_PALM) {
87 touch_major = MAX_TOUCH_MAJOR;
88 pressure = MAX_PRESSURE;
89 } else {
90 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
91 pressure = data[4] & CONTACT_PRESSURE_MASK;
92 }
93
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);
98}
99
100/* Required for Synaptics Palm Detection */
101static void asus_report_tool_width(struct input_dev *input)
102{
103 struct input_mt *mt = input->mt;
104 struct input_mt_slot *oldest;
105 int oldid, count, i;
106
107 oldest = NULL;
108 oldid = mt->trkid;
109 count = 0;
110
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);
114
115 if (id < 0)
116 continue;
117 if ((id - oldid) & TRKID_SGN) {
118 oldest = ps;
119 oldid = id;
120 }
121 count++;
122 }
123
124 if (oldest) {
125 input_report_abs(input, ABS_TOOL_WIDTH,
126 input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
127 }
128}
129
130static void asus_report_input(struct input_dev *input, u8 *data)
131{
132 int i;
133 u8 *contactData = data + 2;
134
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;
139
140 input_mt_slot(input, i);
141 input_mt_report_slot_state(input, toolType, down);
142
143 if (down) {
144 asus_report_contact_down(input, toolType, contactData);
145 contactData += CONTACT_DATA_SIZE;
146 }
147 }
148
149 input_report_key(input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
150 asus_report_tool_width(input);
151
152 input_mt_sync_frame(input);
153 input_sync(input);
154}
155
156static int asus_raw_event(struct hid_device *hdev,
157 struct hid_report *report, u8 *data, int size)
158{
159 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
160
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);
165 return 1;
166 }
167
168 return 0;
169}
170
171static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
172{
173 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
174
175 if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
176 int ret;
177 struct input_dev *input = hi->input;
178
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);
184
185 __set_bit(BTN_LEFT, input->keybit);
186 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
187
188 ret = input_mt_init_slots(input, MAX_CONTACTS, INPUT_MT_POINTER);
189
190 if (ret) {
191 hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
192 return ret;
193 }
194
195 drvdata->input = input;
196 }
197
198 return 0;
199}
200
201static 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,
204 int *max)
205{
206 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
207
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
211 */
212 return -1;
213 }
214
215 return 0;
216}
217
218static int asus_start_multitouch(struct hid_device *hdev)
219{
220 int ret;
221 const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
222 unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
223
224 if (!dmabuf) {
225 ret = -ENOMEM;
226 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
227 return ret;
228 }
229
230 ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
231 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
232
233 kfree(dmabuf);
234
235 if (ret != sizeof(buf)) {
236 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
237 return ret;
238 }
239
240 return 0;
241}
242
243static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
244{
245 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
246
247 if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
248 return asus_start_multitouch(hdev);
249
250 return 0;
251}
252
253static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
254{
255 int ret;
256 struct asus_drvdata *drvdata;
257
258 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
259 if (drvdata == NULL) {
260 hid_err(hdev, "Can't alloc Asus descriptor\n");
261 return -ENOMEM;
262 }
263
264 hid_set_drvdata(hdev, drvdata);
265
266 drvdata->quirks = id->driver_data;
267
268 if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
269 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
270
271 ret = hid_parse(hdev);
272 if (ret) {
273 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
274 return ret;
275 }
276
277 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
278 if (ret) {
279 hid_err(hdev, "Asus hw start failed: %d\n", ret);
280 return ret;
281 }
282
283 if (!drvdata->input) {
284 hid_err(hdev, "Asus input not registered\n");
285 ret = -ENOMEM;
286 goto err_stop_hw;
287 }
288
289 drvdata->input->name = "Asus TouchPad";
290
291 if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
292 ret = asus_start_multitouch(hdev);
293 if (ret)
294 goto err_stop_hw;
295 }
296
297 return 0;
298err_stop_hw:
299 hid_hw_stop(hdev);
300 return ret;
301}
302
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303static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
304 unsigned int *rsize)
305{
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306 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
307
308 if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
309 *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
b94f7d5d 310 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
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311 rdesc[55] = 0xdd;
312 }
313 return rdesc;
314}
315
316static const struct hid_device_id asus_devices[] = {
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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 },
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321 { }
322};
323MODULE_DEVICE_TABLE(hid, asus_devices);
324
325static struct hid_driver asus_driver = {
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326 .name = "asus",
327 .id_table = asus_devices,
328 .report_fixup = asus_report_fixup,
329 .probe = asus_probe,
330 .input_mapping = asus_input_mapping,
331 .input_configured = asus_input_configured,
332#ifdef CONFIG_PM
333 .reset_resume = asus_reset_resume,
334#endif
335 .raw_event = asus_raw_event
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336};
337module_hid_driver(asus_driver);
338
339MODULE_LICENSE("GPL");