2 * HIDPP protocol for Logitech Unifying receivers
4 * Copyright (c) 2011 Logitech (c)
5 * Copyright (c) 2012-2013 Google (c)
6 * Copyright (c) 2013-2014 Red Hat Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; version 2 of the License.
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/device.h>
18 #include <linux/hid.h>
19 #include <linux/module.h>
20 #include <linux/slab.h>
21 #include <linux/sched.h>
22 #include <linux/kfifo.h>
23 #include <linux/input/mt.h>
24 #include <asm/unaligned.h>
27 MODULE_LICENSE("GPL");
28 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
29 MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
31 #define REPORT_ID_HIDPP_SHORT 0x10
32 #define REPORT_ID_HIDPP_LONG 0x11
34 #define HIDPP_REPORT_SHORT_LENGTH 7
35 #define HIDPP_REPORT_LONG_LENGTH 20
37 #define HIDPP_QUIRK_CLASS_WTP BIT(0)
39 /* bits 1..20 are reserved for classes */
40 #define HIDPP_QUIRK_DELAYED_INIT BIT(21)
41 #define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS BIT(22)
42 #define HIDPP_QUIRK_MULTI_INPUT BIT(23)
45 * There are two hidpp protocols in use, the first version hidpp10 is known
46 * as register access protocol or RAP, the second version hidpp20 is known as
47 * feature access protocol or FAP
49 * Most older devices (including the Unifying usb receiver) use the RAP protocol
50 * where as most newer devices use the FAP protocol. Both protocols are
51 * compatible with the underlying transport, which could be usb, Unifiying, or
52 * bluetooth. The message lengths are defined by the hid vendor specific report
53 * descriptor for the HIDPP_SHORT report type (total message lenth 7 bytes) and
54 * the HIDPP_LONG report type (total message length 20 bytes)
56 * The RAP protocol uses both report types, whereas the FAP only uses HIDPP_LONG
57 * messages. The Unifying receiver itself responds to RAP messages (device index
58 * is 0xFF for the receiver), and all messages (short or long) with a device
59 * index between 1 and 6 are passed untouched to the corresponding paired
62 * The paired device can be RAP or FAP, it will receive the message untouched
63 * from the Unifiying receiver.
68 u8 funcindex_clientid;
69 u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
75 u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
84 u8 rawbytes[sizeof(struct fap)];
89 struct hid_device *hid_dev;
90 struct mutex send_mutex;
91 void *send_receive_buf;
92 wait_queue_head_t wait;
93 bool answer_available;
99 struct work_struct work;
100 struct kfifo delayed_work_fifo;
102 struct input_dev *delayed_input;
104 unsigned long quirks;
108 #define HIDPP_ERROR 0x8f
109 #define HIDPP_ERROR_SUCCESS 0x00
110 #define HIDPP_ERROR_INVALID_SUBID 0x01
111 #define HIDPP_ERROR_INVALID_ADRESS 0x02
112 #define HIDPP_ERROR_INVALID_VALUE 0x03
113 #define HIDPP_ERROR_CONNECT_FAIL 0x04
114 #define HIDPP_ERROR_TOO_MANY_DEVICES 0x05
115 #define HIDPP_ERROR_ALREADY_EXISTS 0x06
116 #define HIDPP_ERROR_BUSY 0x07
117 #define HIDPP_ERROR_UNKNOWN_DEVICE 0x08
118 #define HIDPP_ERROR_RESOURCE_ERROR 0x09
119 #define HIDPP_ERROR_REQUEST_UNAVAILABLE 0x0a
120 #define HIDPP_ERROR_INVALID_PARAM_VALUE 0x0b
121 #define HIDPP_ERROR_WRONG_PIN_CODE 0x0c
123 static void hidpp_connect_event(struct hidpp_device *hidpp_dev);
125 static int __hidpp_send_report(struct hid_device *hdev,
126 struct hidpp_report *hidpp_report)
128 int fields_count, ret;
130 switch (hidpp_report->report_id) {
131 case REPORT_ID_HIDPP_SHORT:
132 fields_count = HIDPP_REPORT_SHORT_LENGTH;
134 case REPORT_ID_HIDPP_LONG:
135 fields_count = HIDPP_REPORT_LONG_LENGTH;
142 * set the device_index as the receiver, it will be overwritten by
143 * hid_hw_request if needed
145 hidpp_report->device_index = 0xff;
147 ret = hid_hw_raw_request(hdev, hidpp_report->report_id,
148 (u8 *)hidpp_report, fields_count, HID_OUTPUT_REPORT,
151 return ret == fields_count ? 0 : -1;
155 * hidpp_send_message_sync() returns 0 in case of success, and something else
156 * in case of a failure.
157 * - If ' something else' is positive, that means that an error has been raised
158 * by the protocol itself.
159 * - If ' something else' is negative, that means that we had a classic error
160 * (-ENOMEM, -EPIPE, etc...)
162 static int hidpp_send_message_sync(struct hidpp_device *hidpp,
163 struct hidpp_report *message,
164 struct hidpp_report *response)
168 mutex_lock(&hidpp->send_mutex);
170 hidpp->send_receive_buf = response;
171 hidpp->answer_available = false;
174 * So that we can later validate the answer when it arrives
177 *response = *message;
179 ret = __hidpp_send_report(hidpp->hid_dev, message);
182 dbg_hid("__hidpp_send_report returned err: %d\n", ret);
183 memset(response, 0, sizeof(struct hidpp_report));
187 if (!wait_event_timeout(hidpp->wait, hidpp->answer_available,
189 dbg_hid("%s:timeout waiting for response\n", __func__);
190 memset(response, 0, sizeof(struct hidpp_report));
194 if (response->report_id == REPORT_ID_HIDPP_SHORT &&
195 response->fap.feature_index == HIDPP_ERROR) {
196 ret = response->fap.params[1];
197 dbg_hid("__hidpp_send_report got hidpp error %02X\n", ret);
202 mutex_unlock(&hidpp->send_mutex);
207 static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
208 u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
209 struct hidpp_report *response)
211 struct hidpp_report *message;
214 if (param_count > sizeof(message->fap.params))
217 message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
220 message->report_id = REPORT_ID_HIDPP_LONG;
221 message->fap.feature_index = feat_index;
222 message->fap.funcindex_clientid = funcindex_clientid;
223 memcpy(&message->fap.params, params, param_count);
225 ret = hidpp_send_message_sync(hidpp, message, response);
230 static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
231 u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
232 struct hidpp_report *response)
234 struct hidpp_report *message;
237 if ((report_id != REPORT_ID_HIDPP_SHORT) &&
238 (report_id != REPORT_ID_HIDPP_LONG))
241 if (param_count > sizeof(message->rap.params))
244 message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
247 message->report_id = report_id;
248 message->rap.sub_id = sub_id;
249 message->rap.reg_address = reg_address;
250 memcpy(&message->rap.params, params, param_count);
252 ret = hidpp_send_message_sync(hidpp_dev, message, response);
257 static void delayed_work_cb(struct work_struct *work)
259 struct hidpp_device *hidpp = container_of(work, struct hidpp_device,
261 hidpp_connect_event(hidpp);
264 static inline bool hidpp_match_answer(struct hidpp_report *question,
265 struct hidpp_report *answer)
267 return (answer->fap.feature_index == question->fap.feature_index) &&
268 (answer->fap.funcindex_clientid == question->fap.funcindex_clientid);
271 static inline bool hidpp_match_error(struct hidpp_report *question,
272 struct hidpp_report *answer)
274 return (answer->fap.feature_index == HIDPP_ERROR) &&
275 (answer->fap.funcindex_clientid == question->fap.feature_index) &&
276 (answer->fap.params[0] == question->fap.funcindex_clientid);
279 static inline bool hidpp_report_is_connect_event(struct hidpp_report *report)
281 return (report->report_id == REPORT_ID_HIDPP_SHORT) &&
282 (report->rap.sub_id == 0x41);
285 /* -------------------------------------------------------------------------- */
286 /* HIDP++ 1.0 commands */
287 /* -------------------------------------------------------------------------- */
289 #define HIDPP_SET_REGISTER 0x80
290 #define HIDPP_GET_REGISTER 0x81
291 #define HIDPP_SET_LONG_REGISTER 0x82
292 #define HIDPP_GET_LONG_REGISTER 0x83
294 #define HIDPP_REG_PAIRING_INFORMATION 0xB5
295 #define DEVICE_NAME 0x40
297 static char *hidpp_get_unifying_name(struct hidpp_device *hidpp_dev)
299 struct hidpp_report response;
301 /* hid-logitech-dj is in charge of setting the right device index */
302 u8 params[1] = { DEVICE_NAME };
306 ret = hidpp_send_rap_command_sync(hidpp_dev,
307 REPORT_ID_HIDPP_SHORT,
308 HIDPP_GET_LONG_REGISTER,
309 HIDPP_REG_PAIRING_INFORMATION,
310 params, 1, &response);
314 len = response.rap.params[1];
316 if (2 + len > sizeof(response.rap.params))
319 name = kzalloc(len + 1, GFP_KERNEL);
323 memcpy(name, &response.rap.params[2], len);
327 /* -------------------------------------------------------------------------- */
329 /* -------------------------------------------------------------------------- */
331 #define HIDPP_PAGE_ROOT 0x0000
332 #define HIDPP_PAGE_ROOT_IDX 0x00
334 #define CMD_ROOT_GET_FEATURE 0x01
335 #define CMD_ROOT_GET_PROTOCOL_VERSION 0x11
337 static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
338 u8 *feature_index, u8 *feature_type)
340 struct hidpp_report response;
342 u8 params[2] = { feature >> 8, feature & 0x00FF };
344 ret = hidpp_send_fap_command_sync(hidpp,
346 CMD_ROOT_GET_FEATURE,
347 params, 2, &response);
351 *feature_index = response.fap.params[0];
352 *feature_type = response.fap.params[1];
357 static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
359 struct hidpp_report response;
362 ret = hidpp_send_fap_command_sync(hidpp,
364 CMD_ROOT_GET_PROTOCOL_VERSION,
367 if (ret == HIDPP_ERROR_INVALID_SUBID) {
368 hidpp->protocol_major = 1;
369 hidpp->protocol_minor = 0;
373 /* the device might not be connected */
374 if (ret == HIDPP_ERROR_RESOURCE_ERROR)
378 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
385 hidpp->protocol_major = response.fap.params[0];
386 hidpp->protocol_minor = response.fap.params[1];
391 static bool hidpp_is_connected(struct hidpp_device *hidpp)
395 ret = hidpp_root_get_protocol_version(hidpp);
397 hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
398 hidpp->protocol_major, hidpp->protocol_minor);
402 /* -------------------------------------------------------------------------- */
403 /* 0x0005: GetDeviceNameType */
404 /* -------------------------------------------------------------------------- */
406 #define HIDPP_PAGE_GET_DEVICE_NAME_TYPE 0x0005
408 #define CMD_GET_DEVICE_NAME_TYPE_GET_COUNT 0x01
409 #define CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME 0x11
410 #define CMD_GET_DEVICE_NAME_TYPE_GET_TYPE 0x21
412 static int hidpp_devicenametype_get_count(struct hidpp_device *hidpp,
413 u8 feature_index, u8 *nameLength)
415 struct hidpp_report response;
418 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
419 CMD_GET_DEVICE_NAME_TYPE_GET_COUNT, NULL, 0, &response);
422 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
429 *nameLength = response.fap.params[0];
434 static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
435 u8 feature_index, u8 char_index, char *device_name, int len_buf)
437 struct hidpp_report response;
441 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
442 CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME, &char_index, 1,
446 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
453 if (response.report_id == REPORT_ID_HIDPP_LONG)
454 count = HIDPP_REPORT_LONG_LENGTH - 4;
456 count = HIDPP_REPORT_SHORT_LENGTH - 4;
461 for (i = 0; i < count; i++)
462 device_name[i] = response.fap.params[i];
467 static char *hidpp_get_device_name(struct hidpp_device *hidpp)
476 ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
477 &feature_index, &feature_type);
481 ret = hidpp_devicenametype_get_count(hidpp, feature_index,
486 name = kzalloc(__name_length + 1, GFP_KERNEL);
490 while (index < __name_length) {
491 ret = hidpp_devicenametype_get_device_name(hidpp,
492 feature_index, index, name + index,
493 __name_length - index);
504 /* -------------------------------------------------------------------------- */
505 /* 0x6100: TouchPadRawXY */
506 /* -------------------------------------------------------------------------- */
508 #define HIDPP_PAGE_TOUCHPAD_RAW_XY 0x6100
510 #define CMD_TOUCHPAD_GET_RAW_INFO 0x01
511 #define CMD_TOUCHPAD_SET_RAW_REPORT_STATE 0x21
513 #define EVENT_TOUCHPAD_RAW_XY 0x00
515 #define TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT 0x01
516 #define TOUCHPAD_RAW_XY_ORIGIN_UPPER_LEFT 0x03
518 struct hidpp_touchpad_raw_info {
529 struct hidpp_touchpad_raw_xy_finger {
539 struct hidpp_touchpad_raw_xy {
541 struct hidpp_touchpad_raw_xy_finger fingers[2];
548 static int hidpp_touchpad_get_raw_info(struct hidpp_device *hidpp,
549 u8 feature_index, struct hidpp_touchpad_raw_info *raw_info)
551 struct hidpp_report response;
553 u8 *params = (u8 *)response.fap.params;
555 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
556 CMD_TOUCHPAD_GET_RAW_INFO, NULL, 0, &response);
559 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
566 raw_info->x_size = get_unaligned_be16(¶ms[0]);
567 raw_info->y_size = get_unaligned_be16(¶ms[2]);
568 raw_info->z_range = params[4];
569 raw_info->area_range = params[5];
570 raw_info->maxcontacts = params[7];
571 raw_info->origin = params[8];
572 /* res is given in unit per inch */
573 raw_info->res = get_unaligned_be16(¶ms[13]) * 2 / 51;
578 static int hidpp_touchpad_set_raw_report_state(struct hidpp_device *hidpp_dev,
579 u8 feature_index, bool send_raw_reports,
580 bool sensor_enhanced_settings)
582 struct hidpp_report response;
587 * bit 1 - 16bit Z, no area
588 * bit 2 - enhanced sensitivity
589 * bit 3 - width, height (4 bits each) instead of area
590 * bit 4 - send raw + gestures (degrades smoothness)
591 * remaining bits - reserved
593 u8 params = send_raw_reports | (sensor_enhanced_settings << 2);
595 return hidpp_send_fap_command_sync(hidpp_dev, feature_index,
596 CMD_TOUCHPAD_SET_RAW_REPORT_STATE, ¶ms, 1, &response);
599 static void hidpp_touchpad_touch_event(u8 *data,
600 struct hidpp_touchpad_raw_xy_finger *finger)
602 u8 x_m = data[0] << 2;
603 u8 y_m = data[2] << 2;
605 finger->x = x_m << 6 | data[1];
606 finger->y = y_m << 6 | data[3];
608 finger->contact_type = data[0] >> 6;
609 finger->contact_status = data[2] >> 6;
612 finger->area = data[5];
613 finger->finger_id = data[6] >> 4;
616 static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
617 u8 *data, struct hidpp_touchpad_raw_xy *raw_xy)
619 memset(raw_xy, 0, sizeof(struct hidpp_touchpad_raw_xy));
620 raw_xy->end_of_frame = data[8] & 0x01;
621 raw_xy->spurious_flag = (data[8] >> 1) & 0x01;
622 raw_xy->finger_count = data[15] & 0x0f;
623 raw_xy->button = (data[8] >> 2) & 0x01;
625 if (raw_xy->finger_count) {
626 hidpp_touchpad_touch_event(&data[2], &raw_xy->fingers[0]);
627 hidpp_touchpad_touch_event(&data[9], &raw_xy->fingers[1]);
631 /* ************************************************************************** */
635 /* ************************************************************************** */
637 /* -------------------------------------------------------------------------- */
638 /* Touchpad HID++ devices */
639 /* -------------------------------------------------------------------------- */
641 #define WTP_MANUAL_RESOLUTION 39
644 struct input_dev *input;
648 u8 button_feature_index;
651 unsigned int resolution;
654 static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
655 struct hid_field *field, struct hid_usage *usage,
656 unsigned long **bit, int *max)
658 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
660 if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) &&
661 (field->application == HID_GD_KEYBOARD))
667 static void wtp_populate_input(struct hidpp_device *hidpp,
668 struct input_dev *input_dev, bool origin_is_hid_core)
670 struct wtp_data *wd = hidpp->private_data;
672 if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) && origin_is_hid_core)
673 /* this is the generic hid-input call */
676 __set_bit(EV_ABS, input_dev->evbit);
677 __set_bit(EV_KEY, input_dev->evbit);
678 __clear_bit(EV_REL, input_dev->evbit);
679 __clear_bit(EV_LED, input_dev->evbit);
681 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, wd->x_size, 0, 0);
682 input_abs_set_res(input_dev, ABS_MT_POSITION_X, wd->resolution);
683 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, wd->y_size, 0, 0);
684 input_abs_set_res(input_dev, ABS_MT_POSITION_Y, wd->resolution);
686 /* Max pressure is not given by the devices, pick one */
687 input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 50, 0, 0);
689 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
691 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS)
692 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
694 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
696 input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
697 INPUT_MT_DROP_UNUSED);
699 wd->input = input_dev;
702 static void wtp_touch_event(struct wtp_data *wd,
703 struct hidpp_touchpad_raw_xy_finger *touch_report)
707 if (!touch_report->finger_id || touch_report->contact_type)
711 slot = input_mt_get_slot_by_key(wd->input, touch_report->finger_id);
713 input_mt_slot(wd->input, slot);
714 input_mt_report_slot_state(wd->input, MT_TOOL_FINGER,
715 touch_report->contact_status);
716 if (touch_report->contact_status) {
717 input_event(wd->input, EV_ABS, ABS_MT_POSITION_X,
719 input_event(wd->input, EV_ABS, ABS_MT_POSITION_Y,
720 wd->flip_y ? wd->y_size - touch_report->y :
722 input_event(wd->input, EV_ABS, ABS_MT_PRESSURE,
727 static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
728 struct hidpp_touchpad_raw_xy *raw)
730 struct wtp_data *wd = hidpp->private_data;
733 for (i = 0; i < 2; i++)
734 wtp_touch_event(wd, &(raw->fingers[i]));
736 if (raw->end_of_frame &&
737 !(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
738 input_event(wd->input, EV_KEY, BTN_LEFT, raw->button);
740 if (raw->end_of_frame || raw->finger_count <= 2) {
741 input_mt_sync_frame(wd->input);
742 input_sync(wd->input);
746 static int wtp_mouse_raw_xy_event(struct hidpp_device *hidpp, u8 *data)
748 struct wtp_data *wd = hidpp->private_data;
749 u8 c1_area = ((data[7] & 0xf) * (data[7] & 0xf) +
750 (data[7] >> 4) * (data[7] >> 4)) / 2;
751 u8 c2_area = ((data[13] & 0xf) * (data[13] & 0xf) +
752 (data[13] >> 4) * (data[13] >> 4)) / 2;
753 struct hidpp_touchpad_raw_xy raw = {
754 .timestamp = data[1],
758 .contact_status = !!data[7],
759 .x = get_unaligned_le16(&data[3]),
760 .y = get_unaligned_le16(&data[5]),
763 .finger_id = data[2],
766 .contact_status = !!data[13],
767 .x = get_unaligned_le16(&data[9]),
768 .y = get_unaligned_le16(&data[11]),
771 .finger_id = data[8],
774 .finger_count = wd->maxcontacts,
776 .end_of_frame = (data[0] >> 7) == 0,
777 .button = data[0] & 0x01,
780 wtp_send_raw_xy_event(hidpp, &raw);
785 static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
787 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
788 struct wtp_data *wd = hidpp->private_data;
789 struct hidpp_report *report = (struct hidpp_report *)data;
790 struct hidpp_touchpad_raw_xy raw;
792 if (!wd || !wd->input)
797 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
798 input_event(wd->input, EV_KEY, BTN_LEFT,
800 input_event(wd->input, EV_KEY, BTN_RIGHT,
802 input_sync(wd->input);
806 return wtp_mouse_raw_xy_event(hidpp, &data[7]);
808 case REPORT_ID_HIDPP_LONG:
809 if ((report->fap.feature_index != wd->mt_feature_index) ||
810 (report->fap.funcindex_clientid != EVENT_TOUCHPAD_RAW_XY))
812 hidpp_touchpad_raw_xy_event(hidpp, data + 4, &raw);
814 wtp_send_raw_xy_event(hidpp, &raw);
821 static int wtp_get_config(struct hidpp_device *hidpp)
823 struct wtp_data *wd = hidpp->private_data;
824 struct hidpp_touchpad_raw_info raw_info = {0};
828 ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_TOUCHPAD_RAW_XY,
829 &wd->mt_feature_index, &feature_type);
831 /* means that the device is not powered up */
834 ret = hidpp_touchpad_get_raw_info(hidpp, wd->mt_feature_index,
839 wd->x_size = raw_info.x_size;
840 wd->y_size = raw_info.y_size;
841 wd->maxcontacts = raw_info.maxcontacts;
842 wd->flip_y = raw_info.origin == TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT;
843 wd->resolution = raw_info.res;
845 wd->resolution = WTP_MANUAL_RESOLUTION;
850 static int wtp_allocate(struct hid_device *hdev, const struct hid_device_id *id)
852 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
855 wd = devm_kzalloc(&hdev->dev, sizeof(struct wtp_data),
860 hidpp->private_data = wd;
865 static void wtp_connect(struct hid_device *hdev, bool connected)
867 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
868 struct wtp_data *wd = hidpp->private_data;
875 ret = wtp_get_config(hidpp);
877 hid_err(hdev, "Can not get wtp config: %d\n", ret);
882 hidpp_touchpad_set_raw_report_state(hidpp, wd->mt_feature_index,
886 /* -------------------------------------------------------------------------- */
887 /* Generic HID++ devices */
888 /* -------------------------------------------------------------------------- */
890 static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
891 struct hid_field *field, struct hid_usage *usage,
892 unsigned long **bit, int *max)
894 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
896 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
897 return wtp_input_mapping(hdev, hi, field, usage, bit, max);
902 static void hidpp_populate_input(struct hidpp_device *hidpp,
903 struct input_dev *input, bool origin_is_hid_core)
905 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
906 wtp_populate_input(hidpp, input, origin_is_hid_core);
909 static void hidpp_input_configured(struct hid_device *hdev,
910 struct hid_input *hidinput)
912 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
913 struct input_dev *input = hidinput->input;
915 hidpp_populate_input(hidpp, input, true);
918 static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
921 struct hidpp_report *question = hidpp->send_receive_buf;
922 struct hidpp_report *answer = hidpp->send_receive_buf;
923 struct hidpp_report *report = (struct hidpp_report *)data;
926 * If the mutex is locked then we have a pending answer from a
927 * previoulsly sent command
929 if (unlikely(mutex_is_locked(&hidpp->send_mutex))) {
931 * Check for a correct hidpp20 answer or the corresponding
934 if (hidpp_match_answer(question, report) ||
935 hidpp_match_error(question, report)) {
937 hidpp->answer_available = true;
938 wake_up(&hidpp->wait);
940 * This was an answer to a command that this driver sent
941 * We return 1 to hid-core to avoid forwarding the
942 * command upstream as it has been treated by the driver
949 if (unlikely(hidpp_report_is_connect_event(report))) {
950 atomic_set(&hidpp->connected,
951 !(report->rap.params[0] & (1 << 6)));
952 if ((hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) &&
953 (schedule_work(&hidpp->work) == 0))
954 dbg_hid("%s: connect event already queued\n", __func__);
958 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
959 return wtp_raw_event(hidpp->hid_dev, data, size);
964 static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
967 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
970 case REPORT_ID_HIDPP_LONG:
971 if (size != HIDPP_REPORT_LONG_LENGTH) {
972 hid_err(hdev, "received hid++ report of bad size (%d)",
976 return hidpp_raw_hidpp_event(hidpp, data, size);
977 case REPORT_ID_HIDPP_SHORT:
978 if (size != HIDPP_REPORT_SHORT_LENGTH) {
979 hid_err(hdev, "received hid++ report of bad size (%d)",
983 return hidpp_raw_hidpp_event(hidpp, data, size);
986 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
987 return wtp_raw_event(hdev, data, size);
992 static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
994 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
999 * the device is connected through an Unifying receiver, and
1000 * might not be already connected.
1001 * Ask the receiver for its name.
1003 name = hidpp_get_unifying_name(hidpp);
1005 name = hidpp_get_device_name(hidpp);
1008 hid_err(hdev, "unable to retrieve the name of the device");
1010 snprintf(hdev->name, sizeof(hdev->name), "%s", name);
1015 static int hidpp_input_open(struct input_dev *dev)
1017 struct hid_device *hid = input_get_drvdata(dev);
1019 return hid_hw_open(hid);
1022 static void hidpp_input_close(struct input_dev *dev)
1024 struct hid_device *hid = input_get_drvdata(dev);
1029 static struct input_dev *hidpp_allocate_input(struct hid_device *hdev)
1031 struct input_dev *input_dev = devm_input_allocate_device(&hdev->dev);
1036 input_set_drvdata(input_dev, hdev);
1037 input_dev->open = hidpp_input_open;
1038 input_dev->close = hidpp_input_close;
1040 input_dev->name = hdev->name;
1041 input_dev->phys = hdev->phys;
1042 input_dev->uniq = hdev->uniq;
1043 input_dev->id.bustype = hdev->bus;
1044 input_dev->id.vendor = hdev->vendor;
1045 input_dev->id.product = hdev->product;
1046 input_dev->id.version = hdev->version;
1047 input_dev->dev.parent = &hdev->dev;
1052 static void hidpp_connect_event(struct hidpp_device *hidpp)
1054 struct hid_device *hdev = hidpp->hid_dev;
1056 bool connected = atomic_read(&hidpp->connected);
1057 struct input_dev *input;
1058 char *name, *devm_name;
1060 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
1061 wtp_connect(hdev, connected);
1063 if (!connected || hidpp->delayed_input)
1066 if (!hidpp->protocol_major) {
1067 ret = !hidpp_is_connected(hidpp);
1069 hid_err(hdev, "Can not get the protocol version.\n");
1074 /* the device is already connected, we can ask for its name and
1076 hid_info(hdev, "HID++ %u.%u device connected.\n",
1077 hidpp->protocol_major, hidpp->protocol_minor);
1079 input = hidpp_allocate_input(hdev);
1081 hid_err(hdev, "cannot allocate new input device: %d\n", ret);
1085 name = hidpp_get_device_name(hidpp);
1087 hid_err(hdev, "unable to retrieve the name of the device");
1089 devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s", name);
1091 input->name = devm_name;
1095 hidpp_populate_input(hidpp, input, false);
1097 ret = input_register_device(input);
1099 input_free_device(input);
1101 hidpp->delayed_input = input;
1104 static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
1106 struct hidpp_device *hidpp;
1109 unsigned int connect_mask = HID_CONNECT_DEFAULT;
1111 hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
1116 hidpp->hid_dev = hdev;
1117 hid_set_drvdata(hdev, hidpp);
1119 hidpp->quirks = id->driver_data;
1121 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
1122 ret = wtp_allocate(hdev, id);
1124 goto wtp_allocate_fail;
1127 INIT_WORK(&hidpp->work, delayed_work_cb);
1128 mutex_init(&hidpp->send_mutex);
1129 init_waitqueue_head(&hidpp->wait);
1131 ret = hid_parse(hdev);
1133 hid_err(hdev, "%s:parse failed\n", __func__);
1134 goto hid_parse_fail;
1137 /* Allow incoming packets */
1138 hid_device_io_start(hdev);
1140 connected = hidpp_is_connected(hidpp);
1141 if (id->group != HID_GROUP_LOGITECH_DJ_DEVICE) {
1143 hid_err(hdev, "Device not connected");
1144 hid_device_io_stop(hdev);
1145 goto hid_parse_fail;
1148 hid_info(hdev, "HID++ %u.%u device connected.\n",
1149 hidpp->protocol_major, hidpp->protocol_minor);
1152 hidpp_overwrite_name(hdev, id->group == HID_GROUP_LOGITECH_DJ_DEVICE);
1153 atomic_set(&hidpp->connected, connected);
1155 if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
1156 ret = wtp_get_config(hidpp);
1158 goto hid_parse_fail;
1161 /* Block incoming packets */
1162 hid_device_io_stop(hdev);
1164 if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT)
1165 connect_mask &= ~HID_CONNECT_HIDINPUT;
1167 /* Re-enable hidinput for multi-input devices */
1168 if (hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT)
1169 connect_mask |= HID_CONNECT_HIDINPUT;
1171 ret = hid_hw_start(hdev, connect_mask);
1173 hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
1174 goto hid_hw_start_fail;
1177 if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) {
1178 /* Allow incoming packets */
1179 hid_device_io_start(hdev);
1181 hidpp_connect_event(hidpp);
1188 cancel_work_sync(&hidpp->work);
1189 mutex_destroy(&hidpp->send_mutex);
1191 hid_set_drvdata(hdev, NULL);
1195 static void hidpp_remove(struct hid_device *hdev)
1197 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1199 cancel_work_sync(&hidpp->work);
1200 mutex_destroy(&hidpp->send_mutex);
1204 static const struct hid_device_id hidpp_devices[] = {
1205 { /* wireless touchpad */
1206 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1207 USB_VENDOR_ID_LOGITECH, 0x4011),
1208 .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT |
1209 HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS },
1210 { /* wireless touchpad T650 */
1211 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1212 USB_VENDOR_ID_LOGITECH, 0x4101),
1213 .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
1214 { /* wireless touchpad T651 */
1215 HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
1216 USB_DEVICE_ID_LOGITECH_T651),
1217 .driver_data = HIDPP_QUIRK_CLASS_WTP },
1218 { /* Keyboard TK820 */
1219 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1220 USB_VENDOR_ID_LOGITECH, 0x4102),
1221 .driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_MULTI_INPUT |
1222 HIDPP_QUIRK_CLASS_WTP },
1224 { HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1225 USB_VENDOR_ID_LOGITECH, HID_ANY_ID)},
1229 MODULE_DEVICE_TABLE(hid, hidpp_devices);
1231 static struct hid_driver hidpp_driver = {
1232 .name = "logitech-hidpp-device",
1233 .id_table = hidpp_devices,
1234 .probe = hidpp_probe,
1235 .remove = hidpp_remove,
1236 .raw_event = hidpp_raw_event,
1237 .input_configured = hidpp_input_configured,
1238 .input_mapping = hidpp_input_mapping,
1241 module_hid_driver(hidpp_driver);