1283 lines
33 KiB
C
1283 lines
33 KiB
C
/*
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* HIDPP protocol for Logitech Unifying receivers
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*
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* Copyright (c) 2011 Logitech (c)
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* Copyright (c) 2012-2013 Google (c)
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* Copyright (c) 2013-2014 Red Hat Inc.
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; version 2 of the License.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/kfifo.h>
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#include <linux/input/mt.h>
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#include <asm/unaligned.h>
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#include "hid-ids.h"
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
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MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
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#define REPORT_ID_HIDPP_SHORT 0x10
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#define REPORT_ID_HIDPP_LONG 0x11
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#define HIDPP_REPORT_SHORT_LENGTH 7
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#define HIDPP_REPORT_LONG_LENGTH 20
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#define HIDPP_QUIRK_CLASS_WTP BIT(0)
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/* bits 1..20 are reserved for classes */
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#define HIDPP_QUIRK_DELAYED_INIT BIT(21)
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#define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS BIT(22)
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#define HIDPP_QUIRK_MULTI_INPUT BIT(23)
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/*
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* There are two hidpp protocols in use, the first version hidpp10 is known
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* as register access protocol or RAP, the second version hidpp20 is known as
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* feature access protocol or FAP
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*
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* Most older devices (including the Unifying usb receiver) use the RAP protocol
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* where as most newer devices use the FAP protocol. Both protocols are
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* compatible with the underlying transport, which could be usb, Unifiying, or
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* bluetooth. The message lengths are defined by the hid vendor specific report
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* descriptor for the HIDPP_SHORT report type (total message lenth 7 bytes) and
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* the HIDPP_LONG report type (total message length 20 bytes)
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*
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* The RAP protocol uses both report types, whereas the FAP only uses HIDPP_LONG
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* messages. The Unifying receiver itself responds to RAP messages (device index
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* is 0xFF for the receiver), and all messages (short or long) with a device
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* index between 1 and 6 are passed untouched to the corresponding paired
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* Unifying device.
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*
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* The paired device can be RAP or FAP, it will receive the message untouched
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* from the Unifiying receiver.
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*/
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struct fap {
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u8 feature_index;
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u8 funcindex_clientid;
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u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
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};
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struct rap {
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u8 sub_id;
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u8 reg_address;
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u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
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};
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struct hidpp_report {
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u8 report_id;
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u8 device_index;
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union {
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struct fap fap;
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struct rap rap;
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u8 rawbytes[sizeof(struct fap)];
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};
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} __packed;
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struct hidpp_device {
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struct hid_device *hid_dev;
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struct mutex send_mutex;
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void *send_receive_buf;
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wait_queue_head_t wait;
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bool answer_available;
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u8 protocol_major;
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u8 protocol_minor;
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void *private_data;
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struct work_struct work;
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struct kfifo delayed_work_fifo;
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atomic_t connected;
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struct input_dev *delayed_input;
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unsigned long quirks;
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};
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#define HIDPP_ERROR 0x8f
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#define HIDPP_ERROR_SUCCESS 0x00
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#define HIDPP_ERROR_INVALID_SUBID 0x01
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#define HIDPP_ERROR_INVALID_ADRESS 0x02
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#define HIDPP_ERROR_INVALID_VALUE 0x03
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#define HIDPP_ERROR_CONNECT_FAIL 0x04
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#define HIDPP_ERROR_TOO_MANY_DEVICES 0x05
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#define HIDPP_ERROR_ALREADY_EXISTS 0x06
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#define HIDPP_ERROR_BUSY 0x07
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#define HIDPP_ERROR_UNKNOWN_DEVICE 0x08
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#define HIDPP_ERROR_RESOURCE_ERROR 0x09
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#define HIDPP_ERROR_REQUEST_UNAVAILABLE 0x0a
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#define HIDPP_ERROR_INVALID_PARAM_VALUE 0x0b
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#define HIDPP_ERROR_WRONG_PIN_CODE 0x0c
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static void hidpp_connect_event(struct hidpp_device *hidpp_dev);
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static int __hidpp_send_report(struct hid_device *hdev,
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struct hidpp_report *hidpp_report)
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{
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int fields_count, ret;
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switch (hidpp_report->report_id) {
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case REPORT_ID_HIDPP_SHORT:
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fields_count = HIDPP_REPORT_SHORT_LENGTH;
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break;
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case REPORT_ID_HIDPP_LONG:
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fields_count = HIDPP_REPORT_LONG_LENGTH;
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break;
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default:
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return -ENODEV;
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}
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/*
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* set the device_index as the receiver, it will be overwritten by
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* hid_hw_request if needed
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*/
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hidpp_report->device_index = 0xff;
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ret = hid_hw_raw_request(hdev, hidpp_report->report_id,
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(u8 *)hidpp_report, fields_count, HID_OUTPUT_REPORT,
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HID_REQ_SET_REPORT);
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return ret == fields_count ? 0 : -1;
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}
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/**
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* hidpp_send_message_sync() returns 0 in case of success, and something else
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* in case of a failure.
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* - If ' something else' is positive, that means that an error has been raised
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* by the protocol itself.
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* - If ' something else' is negative, that means that we had a classic error
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* (-ENOMEM, -EPIPE, etc...)
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*/
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static int hidpp_send_message_sync(struct hidpp_device *hidpp,
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struct hidpp_report *message,
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struct hidpp_report *response)
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{
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int ret;
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mutex_lock(&hidpp->send_mutex);
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hidpp->send_receive_buf = response;
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hidpp->answer_available = false;
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/*
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* So that we can later validate the answer when it arrives
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* in hidpp_raw_event
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*/
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*response = *message;
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ret = __hidpp_send_report(hidpp->hid_dev, message);
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if (ret) {
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dbg_hid("__hidpp_send_report returned err: %d\n", ret);
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memset(response, 0, sizeof(struct hidpp_report));
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goto exit;
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}
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if (!wait_event_timeout(hidpp->wait, hidpp->answer_available,
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5*HZ)) {
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dbg_hid("%s:timeout waiting for response\n", __func__);
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memset(response, 0, sizeof(struct hidpp_report));
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ret = -ETIMEDOUT;
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}
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if (response->report_id == REPORT_ID_HIDPP_SHORT &&
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response->fap.feature_index == HIDPP_ERROR) {
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ret = response->fap.params[1];
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dbg_hid("__hidpp_send_report got hidpp error %02X\n", ret);
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goto exit;
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}
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exit:
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mutex_unlock(&hidpp->send_mutex);
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return ret;
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}
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static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
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u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
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struct hidpp_report *response)
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{
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struct hidpp_report *message;
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int ret;
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if (param_count > sizeof(message->fap.params))
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return -EINVAL;
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message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
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if (!message)
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return -ENOMEM;
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message->report_id = REPORT_ID_HIDPP_LONG;
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message->fap.feature_index = feat_index;
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message->fap.funcindex_clientid = funcindex_clientid;
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memcpy(&message->fap.params, params, param_count);
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ret = hidpp_send_message_sync(hidpp, message, response);
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kfree(message);
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return ret;
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}
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static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
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u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
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struct hidpp_report *response)
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{
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struct hidpp_report *message;
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int ret;
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if ((report_id != REPORT_ID_HIDPP_SHORT) &&
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(report_id != REPORT_ID_HIDPP_LONG))
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return -EINVAL;
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if (param_count > sizeof(message->rap.params))
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return -EINVAL;
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message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
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if (!message)
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return -ENOMEM;
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message->report_id = report_id;
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message->rap.sub_id = sub_id;
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message->rap.reg_address = reg_address;
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memcpy(&message->rap.params, params, param_count);
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ret = hidpp_send_message_sync(hidpp_dev, message, response);
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kfree(message);
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return ret;
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}
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static void delayed_work_cb(struct work_struct *work)
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{
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struct hidpp_device *hidpp = container_of(work, struct hidpp_device,
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work);
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hidpp_connect_event(hidpp);
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}
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static inline bool hidpp_match_answer(struct hidpp_report *question,
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struct hidpp_report *answer)
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{
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return (answer->fap.feature_index == question->fap.feature_index) &&
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(answer->fap.funcindex_clientid == question->fap.funcindex_clientid);
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}
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static inline bool hidpp_match_error(struct hidpp_report *question,
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struct hidpp_report *answer)
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{
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return (answer->fap.feature_index == HIDPP_ERROR) &&
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(answer->fap.funcindex_clientid == question->fap.feature_index) &&
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(answer->fap.params[0] == question->fap.funcindex_clientid);
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}
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static inline bool hidpp_report_is_connect_event(struct hidpp_report *report)
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{
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return (report->report_id == REPORT_ID_HIDPP_SHORT) &&
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(report->rap.sub_id == 0x41);
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}
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/**
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* hidpp_prefix_name() prefixes the current given name with "Logitech ".
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*/
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static void hidpp_prefix_name(char **name, int name_length)
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{
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#define PREFIX_LENGTH 9 /* "Logitech " */
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int new_length;
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char *new_name;
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if (name_length > PREFIX_LENGTH &&
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strncmp(*name, "Logitech ", PREFIX_LENGTH) == 0)
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/* The prefix has is already in the name */
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return;
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new_length = PREFIX_LENGTH + name_length;
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new_name = kzalloc(new_length, GFP_KERNEL);
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if (!new_name)
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return;
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snprintf(new_name, new_length, "Logitech %s", *name);
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kfree(*name);
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*name = new_name;
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}
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/* -------------------------------------------------------------------------- */
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/* HIDP++ 1.0 commands */
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/* -------------------------------------------------------------------------- */
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#define HIDPP_SET_REGISTER 0x80
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#define HIDPP_GET_REGISTER 0x81
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#define HIDPP_SET_LONG_REGISTER 0x82
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#define HIDPP_GET_LONG_REGISTER 0x83
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#define HIDPP_REG_PAIRING_INFORMATION 0xB5
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#define DEVICE_NAME 0x40
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static char *hidpp_get_unifying_name(struct hidpp_device *hidpp_dev)
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{
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struct hidpp_report response;
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int ret;
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/* hid-logitech-dj is in charge of setting the right device index */
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u8 params[1] = { DEVICE_NAME };
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char *name;
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int len;
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ret = hidpp_send_rap_command_sync(hidpp_dev,
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REPORT_ID_HIDPP_SHORT,
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HIDPP_GET_LONG_REGISTER,
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HIDPP_REG_PAIRING_INFORMATION,
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params, 1, &response);
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if (ret)
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return NULL;
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len = response.rap.params[1];
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if (2 + len > sizeof(response.rap.params))
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return NULL;
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name = kzalloc(len + 1, GFP_KERNEL);
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if (!name)
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return NULL;
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memcpy(name, &response.rap.params[2], len);
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/* include the terminating '\0' */
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hidpp_prefix_name(&name, len + 1);
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return name;
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}
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/* -------------------------------------------------------------------------- */
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/* 0x0000: Root */
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/* -------------------------------------------------------------------------- */
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#define HIDPP_PAGE_ROOT 0x0000
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#define HIDPP_PAGE_ROOT_IDX 0x00
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#define CMD_ROOT_GET_FEATURE 0x01
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#define CMD_ROOT_GET_PROTOCOL_VERSION 0x11
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static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
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u8 *feature_index, u8 *feature_type)
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{
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struct hidpp_report response;
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int ret;
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u8 params[2] = { feature >> 8, feature & 0x00FF };
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ret = hidpp_send_fap_command_sync(hidpp,
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HIDPP_PAGE_ROOT_IDX,
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CMD_ROOT_GET_FEATURE,
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params, 2, &response);
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if (ret)
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return ret;
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*feature_index = response.fap.params[0];
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*feature_type = response.fap.params[1];
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return ret;
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}
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static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
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{
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struct hidpp_report response;
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int ret;
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ret = hidpp_send_fap_command_sync(hidpp,
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HIDPP_PAGE_ROOT_IDX,
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CMD_ROOT_GET_PROTOCOL_VERSION,
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NULL, 0, &response);
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if (ret == HIDPP_ERROR_INVALID_SUBID) {
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hidpp->protocol_major = 1;
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hidpp->protocol_minor = 0;
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return 0;
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}
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/* the device might not be connected */
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if (ret == HIDPP_ERROR_RESOURCE_ERROR)
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return -EIO;
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if (ret > 0) {
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hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
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__func__, ret);
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return -EPROTO;
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}
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if (ret)
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return ret;
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hidpp->protocol_major = response.fap.params[0];
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hidpp->protocol_minor = response.fap.params[1];
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return ret;
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}
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static bool hidpp_is_connected(struct hidpp_device *hidpp)
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{
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int ret;
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ret = hidpp_root_get_protocol_version(hidpp);
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if (!ret)
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hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
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hidpp->protocol_major, hidpp->protocol_minor);
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return ret == 0;
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}
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/* -------------------------------------------------------------------------- */
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/* 0x0005: GetDeviceNameType */
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/* -------------------------------------------------------------------------- */
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#define HIDPP_PAGE_GET_DEVICE_NAME_TYPE 0x0005
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#define CMD_GET_DEVICE_NAME_TYPE_GET_COUNT 0x01
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#define CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME 0x11
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#define CMD_GET_DEVICE_NAME_TYPE_GET_TYPE 0x21
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static int hidpp_devicenametype_get_count(struct hidpp_device *hidpp,
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u8 feature_index, u8 *nameLength)
|
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{
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struct hidpp_report response;
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int ret;
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ret = hidpp_send_fap_command_sync(hidpp, feature_index,
|
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CMD_GET_DEVICE_NAME_TYPE_GET_COUNT, NULL, 0, &response);
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|
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if (ret > 0) {
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hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
|
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__func__, ret);
|
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return -EPROTO;
|
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}
|
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if (ret)
|
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return ret;
|
|
|
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*nameLength = response.fap.params[0];
|
|
|
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return ret;
|
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}
|
|
|
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static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
|
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u8 feature_index, u8 char_index, char *device_name, int len_buf)
|
|
{
|
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struct hidpp_report response;
|
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int ret, i;
|
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int count;
|
|
|
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ret = hidpp_send_fap_command_sync(hidpp, feature_index,
|
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CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME, &char_index, 1,
|
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&response);
|
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|
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if (ret > 0) {
|
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hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
|
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__func__, ret);
|
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return -EPROTO;
|
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}
|
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if (ret)
|
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return ret;
|
|
|
|
if (response.report_id == REPORT_ID_HIDPP_LONG)
|
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count = HIDPP_REPORT_LONG_LENGTH - 4;
|
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else
|
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count = HIDPP_REPORT_SHORT_LENGTH - 4;
|
|
|
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if (len_buf < count)
|
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count = len_buf;
|
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|
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for (i = 0; i < count; i++)
|
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device_name[i] = response.fap.params[i];
|
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|
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return count;
|
|
}
|
|
|
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static char *hidpp_get_device_name(struct hidpp_device *hidpp)
|
|
{
|
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u8 feature_type;
|
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u8 feature_index;
|
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u8 __name_length;
|
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char *name;
|
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unsigned index = 0;
|
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int ret;
|
|
|
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ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
|
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&feature_index, &feature_type);
|
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if (ret)
|
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return NULL;
|
|
|
|
ret = hidpp_devicenametype_get_count(hidpp, feature_index,
|
|
&__name_length);
|
|
if (ret)
|
|
return NULL;
|
|
|
|
name = kzalloc(__name_length + 1, GFP_KERNEL);
|
|
if (!name)
|
|
return NULL;
|
|
|
|
while (index < __name_length) {
|
|
ret = hidpp_devicenametype_get_device_name(hidpp,
|
|
feature_index, index, name + index,
|
|
__name_length - index);
|
|
if (ret <= 0) {
|
|
kfree(name);
|
|
return NULL;
|
|
}
|
|
index += ret;
|
|
}
|
|
|
|
/* include the terminating '\0' */
|
|
hidpp_prefix_name(&name, __name_length + 1);
|
|
|
|
return name;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
/* 0x6100: TouchPadRawXY */
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
#define HIDPP_PAGE_TOUCHPAD_RAW_XY 0x6100
|
|
|
|
#define CMD_TOUCHPAD_GET_RAW_INFO 0x01
|
|
#define CMD_TOUCHPAD_SET_RAW_REPORT_STATE 0x21
|
|
|
|
#define EVENT_TOUCHPAD_RAW_XY 0x00
|
|
|
|
#define TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT 0x01
|
|
#define TOUCHPAD_RAW_XY_ORIGIN_UPPER_LEFT 0x03
|
|
|
|
struct hidpp_touchpad_raw_info {
|
|
u16 x_size;
|
|
u16 y_size;
|
|
u8 z_range;
|
|
u8 area_range;
|
|
u8 timestamp_unit;
|
|
u8 maxcontacts;
|
|
u8 origin;
|
|
u16 res;
|
|
};
|
|
|
|
struct hidpp_touchpad_raw_xy_finger {
|
|
u8 contact_type;
|
|
u8 contact_status;
|
|
u16 x;
|
|
u16 y;
|
|
u8 z;
|
|
u8 area;
|
|
u8 finger_id;
|
|
};
|
|
|
|
struct hidpp_touchpad_raw_xy {
|
|
u16 timestamp;
|
|
struct hidpp_touchpad_raw_xy_finger fingers[2];
|
|
u8 spurious_flag;
|
|
u8 end_of_frame;
|
|
u8 finger_count;
|
|
u8 button;
|
|
};
|
|
|
|
static int hidpp_touchpad_get_raw_info(struct hidpp_device *hidpp,
|
|
u8 feature_index, struct hidpp_touchpad_raw_info *raw_info)
|
|
{
|
|
struct hidpp_report response;
|
|
int ret;
|
|
u8 *params = (u8 *)response.fap.params;
|
|
|
|
ret = hidpp_send_fap_command_sync(hidpp, feature_index,
|
|
CMD_TOUCHPAD_GET_RAW_INFO, NULL, 0, &response);
|
|
|
|
if (ret > 0) {
|
|
hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
|
|
__func__, ret);
|
|
return -EPROTO;
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
|
|
raw_info->x_size = get_unaligned_be16(¶ms[0]);
|
|
raw_info->y_size = get_unaligned_be16(¶ms[2]);
|
|
raw_info->z_range = params[4];
|
|
raw_info->area_range = params[5];
|
|
raw_info->maxcontacts = params[7];
|
|
raw_info->origin = params[8];
|
|
/* res is given in unit per inch */
|
|
raw_info->res = get_unaligned_be16(¶ms[13]) * 2 / 51;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int hidpp_touchpad_set_raw_report_state(struct hidpp_device *hidpp_dev,
|
|
u8 feature_index, bool send_raw_reports,
|
|
bool sensor_enhanced_settings)
|
|
{
|
|
struct hidpp_report response;
|
|
|
|
/*
|
|
* Params:
|
|
* bit 0 - enable raw
|
|
* bit 1 - 16bit Z, no area
|
|
* bit 2 - enhanced sensitivity
|
|
* bit 3 - width, height (4 bits each) instead of area
|
|
* bit 4 - send raw + gestures (degrades smoothness)
|
|
* remaining bits - reserved
|
|
*/
|
|
u8 params = send_raw_reports | (sensor_enhanced_settings << 2);
|
|
|
|
return hidpp_send_fap_command_sync(hidpp_dev, feature_index,
|
|
CMD_TOUCHPAD_SET_RAW_REPORT_STATE, ¶ms, 1, &response);
|
|
}
|
|
|
|
static void hidpp_touchpad_touch_event(u8 *data,
|
|
struct hidpp_touchpad_raw_xy_finger *finger)
|
|
{
|
|
u8 x_m = data[0] << 2;
|
|
u8 y_m = data[2] << 2;
|
|
|
|
finger->x = x_m << 6 | data[1];
|
|
finger->y = y_m << 6 | data[3];
|
|
|
|
finger->contact_type = data[0] >> 6;
|
|
finger->contact_status = data[2] >> 6;
|
|
|
|
finger->z = data[4];
|
|
finger->area = data[5];
|
|
finger->finger_id = data[6] >> 4;
|
|
}
|
|
|
|
static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
|
|
u8 *data, struct hidpp_touchpad_raw_xy *raw_xy)
|
|
{
|
|
memset(raw_xy, 0, sizeof(struct hidpp_touchpad_raw_xy));
|
|
raw_xy->end_of_frame = data[8] & 0x01;
|
|
raw_xy->spurious_flag = (data[8] >> 1) & 0x01;
|
|
raw_xy->finger_count = data[15] & 0x0f;
|
|
raw_xy->button = (data[8] >> 2) & 0x01;
|
|
|
|
if (raw_xy->finger_count) {
|
|
hidpp_touchpad_touch_event(&data[2], &raw_xy->fingers[0]);
|
|
hidpp_touchpad_touch_event(&data[9], &raw_xy->fingers[1]);
|
|
}
|
|
}
|
|
|
|
/* ************************************************************************** */
|
|
/* */
|
|
/* Device Support */
|
|
/* */
|
|
/* ************************************************************************** */
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
/* Touchpad HID++ devices */
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
#define WTP_MANUAL_RESOLUTION 39
|
|
|
|
struct wtp_data {
|
|
struct input_dev *input;
|
|
u16 x_size, y_size;
|
|
u8 finger_count;
|
|
u8 mt_feature_index;
|
|
u8 button_feature_index;
|
|
u8 maxcontacts;
|
|
bool flip_y;
|
|
unsigned int resolution;
|
|
};
|
|
|
|
static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
|
|
if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) &&
|
|
(field->application == HID_GD_KEYBOARD))
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void wtp_populate_input(struct hidpp_device *hidpp,
|
|
struct input_dev *input_dev, bool origin_is_hid_core)
|
|
{
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
|
|
if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) && origin_is_hid_core)
|
|
/* this is the generic hid-input call */
|
|
return;
|
|
|
|
__set_bit(EV_ABS, input_dev->evbit);
|
|
__set_bit(EV_KEY, input_dev->evbit);
|
|
__clear_bit(EV_REL, input_dev->evbit);
|
|
__clear_bit(EV_LED, input_dev->evbit);
|
|
|
|
input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, wd->x_size, 0, 0);
|
|
input_abs_set_res(input_dev, ABS_MT_POSITION_X, wd->resolution);
|
|
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, wd->y_size, 0, 0);
|
|
input_abs_set_res(input_dev, ABS_MT_POSITION_Y, wd->resolution);
|
|
|
|
/* Max pressure is not given by the devices, pick one */
|
|
input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 50, 0, 0);
|
|
|
|
input_set_capability(input_dev, EV_KEY, BTN_LEFT);
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS)
|
|
input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
|
|
else
|
|
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
|
|
|
|
input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
|
|
INPUT_MT_DROP_UNUSED);
|
|
|
|
wd->input = input_dev;
|
|
}
|
|
|
|
static void wtp_touch_event(struct wtp_data *wd,
|
|
struct hidpp_touchpad_raw_xy_finger *touch_report)
|
|
{
|
|
int slot;
|
|
|
|
if (!touch_report->finger_id || touch_report->contact_type)
|
|
/* no actual data */
|
|
return;
|
|
|
|
slot = input_mt_get_slot_by_key(wd->input, touch_report->finger_id);
|
|
|
|
input_mt_slot(wd->input, slot);
|
|
input_mt_report_slot_state(wd->input, MT_TOOL_FINGER,
|
|
touch_report->contact_status);
|
|
if (touch_report->contact_status) {
|
|
input_event(wd->input, EV_ABS, ABS_MT_POSITION_X,
|
|
touch_report->x);
|
|
input_event(wd->input, EV_ABS, ABS_MT_POSITION_Y,
|
|
wd->flip_y ? wd->y_size - touch_report->y :
|
|
touch_report->y);
|
|
input_event(wd->input, EV_ABS, ABS_MT_PRESSURE,
|
|
touch_report->area);
|
|
}
|
|
}
|
|
|
|
static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
|
|
struct hidpp_touchpad_raw_xy *raw)
|
|
{
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
wtp_touch_event(wd, &(raw->fingers[i]));
|
|
|
|
if (raw->end_of_frame &&
|
|
!(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
|
|
input_event(wd->input, EV_KEY, BTN_LEFT, raw->button);
|
|
|
|
if (raw->end_of_frame || raw->finger_count <= 2) {
|
|
input_mt_sync_frame(wd->input);
|
|
input_sync(wd->input);
|
|
}
|
|
}
|
|
|
|
static int wtp_mouse_raw_xy_event(struct hidpp_device *hidpp, u8 *data)
|
|
{
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
u8 c1_area = ((data[7] & 0xf) * (data[7] & 0xf) +
|
|
(data[7] >> 4) * (data[7] >> 4)) / 2;
|
|
u8 c2_area = ((data[13] & 0xf) * (data[13] & 0xf) +
|
|
(data[13] >> 4) * (data[13] >> 4)) / 2;
|
|
struct hidpp_touchpad_raw_xy raw = {
|
|
.timestamp = data[1],
|
|
.fingers = {
|
|
{
|
|
.contact_type = 0,
|
|
.contact_status = !!data[7],
|
|
.x = get_unaligned_le16(&data[3]),
|
|
.y = get_unaligned_le16(&data[5]),
|
|
.z = c1_area,
|
|
.area = c1_area,
|
|
.finger_id = data[2],
|
|
}, {
|
|
.contact_type = 0,
|
|
.contact_status = !!data[13],
|
|
.x = get_unaligned_le16(&data[9]),
|
|
.y = get_unaligned_le16(&data[11]),
|
|
.z = c2_area,
|
|
.area = c2_area,
|
|
.finger_id = data[8],
|
|
}
|
|
},
|
|
.finger_count = wd->maxcontacts,
|
|
.spurious_flag = 0,
|
|
.end_of_frame = (data[0] >> 7) == 0,
|
|
.button = data[0] & 0x01,
|
|
};
|
|
|
|
wtp_send_raw_xy_event(hidpp, &raw);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
struct hidpp_report *report = (struct hidpp_report *)data;
|
|
struct hidpp_touchpad_raw_xy raw;
|
|
|
|
if (!wd || !wd->input)
|
|
return 1;
|
|
|
|
switch (data[0]) {
|
|
case 0x02:
|
|
if (size < 2) {
|
|
hid_err(hdev, "Received HID report of bad size (%d)",
|
|
size);
|
|
return 1;
|
|
}
|
|
if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
|
|
input_event(wd->input, EV_KEY, BTN_LEFT,
|
|
!!(data[1] & 0x01));
|
|
input_event(wd->input, EV_KEY, BTN_RIGHT,
|
|
!!(data[1] & 0x02));
|
|
input_sync(wd->input);
|
|
return 0;
|
|
} else {
|
|
if (size < 21)
|
|
return 1;
|
|
return wtp_mouse_raw_xy_event(hidpp, &data[7]);
|
|
}
|
|
case REPORT_ID_HIDPP_LONG:
|
|
/* size is already checked in hidpp_raw_event. */
|
|
if ((report->fap.feature_index != wd->mt_feature_index) ||
|
|
(report->fap.funcindex_clientid != EVENT_TOUCHPAD_RAW_XY))
|
|
return 1;
|
|
hidpp_touchpad_raw_xy_event(hidpp, data + 4, &raw);
|
|
|
|
wtp_send_raw_xy_event(hidpp, &raw);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wtp_get_config(struct hidpp_device *hidpp)
|
|
{
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
struct hidpp_touchpad_raw_info raw_info = {0};
|
|
u8 feature_type;
|
|
int ret;
|
|
|
|
ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_TOUCHPAD_RAW_XY,
|
|
&wd->mt_feature_index, &feature_type);
|
|
if (ret)
|
|
/* means that the device is not powered up */
|
|
return ret;
|
|
|
|
ret = hidpp_touchpad_get_raw_info(hidpp, wd->mt_feature_index,
|
|
&raw_info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
wd->x_size = raw_info.x_size;
|
|
wd->y_size = raw_info.y_size;
|
|
wd->maxcontacts = raw_info.maxcontacts;
|
|
wd->flip_y = raw_info.origin == TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT;
|
|
wd->resolution = raw_info.res;
|
|
if (!wd->resolution)
|
|
wd->resolution = WTP_MANUAL_RESOLUTION;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wtp_allocate(struct hid_device *hdev, const struct hid_device_id *id)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
struct wtp_data *wd;
|
|
|
|
wd = devm_kzalloc(&hdev->dev, sizeof(struct wtp_data),
|
|
GFP_KERNEL);
|
|
if (!wd)
|
|
return -ENOMEM;
|
|
|
|
hidpp->private_data = wd;
|
|
|
|
return 0;
|
|
};
|
|
|
|
static void wtp_connect(struct hid_device *hdev, bool connected)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
struct wtp_data *wd = hidpp->private_data;
|
|
int ret;
|
|
|
|
if (!connected)
|
|
return;
|
|
|
|
if (!wd->x_size) {
|
|
ret = wtp_get_config(hidpp);
|
|
if (ret) {
|
|
hid_err(hdev, "Can not get wtp config: %d\n", ret);
|
|
return;
|
|
}
|
|
}
|
|
|
|
hidpp_touchpad_set_raw_report_state(hidpp, wd->mt_feature_index,
|
|
true, true);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
/* Generic HID++ devices */
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
|
|
return wtp_input_mapping(hdev, hi, field, usage, bit, max);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hidpp_populate_input(struct hidpp_device *hidpp,
|
|
struct input_dev *input, bool origin_is_hid_core)
|
|
{
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
|
|
wtp_populate_input(hidpp, input, origin_is_hid_core);
|
|
}
|
|
|
|
static void hidpp_input_configured(struct hid_device *hdev,
|
|
struct hid_input *hidinput)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
struct input_dev *input = hidinput->input;
|
|
|
|
hidpp_populate_input(hidpp, input, true);
|
|
}
|
|
|
|
static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
|
|
int size)
|
|
{
|
|
struct hidpp_report *question = hidpp->send_receive_buf;
|
|
struct hidpp_report *answer = hidpp->send_receive_buf;
|
|
struct hidpp_report *report = (struct hidpp_report *)data;
|
|
|
|
/*
|
|
* If the mutex is locked then we have a pending answer from a
|
|
* previoulsly sent command
|
|
*/
|
|
if (unlikely(mutex_is_locked(&hidpp->send_mutex))) {
|
|
/*
|
|
* Check for a correct hidpp20 answer or the corresponding
|
|
* error
|
|
*/
|
|
if (hidpp_match_answer(question, report) ||
|
|
hidpp_match_error(question, report)) {
|
|
*answer = *report;
|
|
hidpp->answer_available = true;
|
|
wake_up(&hidpp->wait);
|
|
/*
|
|
* This was an answer to a command that this driver sent
|
|
* We return 1 to hid-core to avoid forwarding the
|
|
* command upstream as it has been treated by the driver
|
|
*/
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (unlikely(hidpp_report_is_connect_event(report))) {
|
|
atomic_set(&hidpp->connected,
|
|
!(report->rap.params[0] & (1 << 6)));
|
|
if ((hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) &&
|
|
(schedule_work(&hidpp->work) == 0))
|
|
dbg_hid("%s: connect event already queued\n", __func__);
|
|
return 1;
|
|
}
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
|
|
return wtp_raw_event(hidpp->hid_dev, data, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
|
|
u8 *data, int size)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
|
|
switch (data[0]) {
|
|
case REPORT_ID_HIDPP_LONG:
|
|
if (size != HIDPP_REPORT_LONG_LENGTH) {
|
|
hid_err(hdev, "received hid++ report of bad size (%d)",
|
|
size);
|
|
return 1;
|
|
}
|
|
return hidpp_raw_hidpp_event(hidpp, data, size);
|
|
case REPORT_ID_HIDPP_SHORT:
|
|
if (size != HIDPP_REPORT_SHORT_LENGTH) {
|
|
hid_err(hdev, "received hid++ report of bad size (%d)",
|
|
size);
|
|
return 1;
|
|
}
|
|
return hidpp_raw_hidpp_event(hidpp, data, size);
|
|
}
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
|
|
return wtp_raw_event(hdev, data, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
char *name;
|
|
|
|
if (use_unifying)
|
|
/*
|
|
* the device is connected through an Unifying receiver, and
|
|
* might not be already connected.
|
|
* Ask the receiver for its name.
|
|
*/
|
|
name = hidpp_get_unifying_name(hidpp);
|
|
else
|
|
name = hidpp_get_device_name(hidpp);
|
|
|
|
if (!name)
|
|
hid_err(hdev, "unable to retrieve the name of the device");
|
|
else
|
|
snprintf(hdev->name, sizeof(hdev->name), "%s", name);
|
|
|
|
kfree(name);
|
|
}
|
|
|
|
static int hidpp_input_open(struct input_dev *dev)
|
|
{
|
|
struct hid_device *hid = input_get_drvdata(dev);
|
|
|
|
return hid_hw_open(hid);
|
|
}
|
|
|
|
static void hidpp_input_close(struct input_dev *dev)
|
|
{
|
|
struct hid_device *hid = input_get_drvdata(dev);
|
|
|
|
hid_hw_close(hid);
|
|
}
|
|
|
|
static struct input_dev *hidpp_allocate_input(struct hid_device *hdev)
|
|
{
|
|
struct input_dev *input_dev = devm_input_allocate_device(&hdev->dev);
|
|
|
|
if (!input_dev)
|
|
return NULL;
|
|
|
|
input_set_drvdata(input_dev, hdev);
|
|
input_dev->open = hidpp_input_open;
|
|
input_dev->close = hidpp_input_close;
|
|
|
|
input_dev->name = hdev->name;
|
|
input_dev->phys = hdev->phys;
|
|
input_dev->uniq = hdev->uniq;
|
|
input_dev->id.bustype = hdev->bus;
|
|
input_dev->id.vendor = hdev->vendor;
|
|
input_dev->id.product = hdev->product;
|
|
input_dev->id.version = hdev->version;
|
|
input_dev->dev.parent = &hdev->dev;
|
|
|
|
return input_dev;
|
|
}
|
|
|
|
static void hidpp_connect_event(struct hidpp_device *hidpp)
|
|
{
|
|
struct hid_device *hdev = hidpp->hid_dev;
|
|
int ret = 0;
|
|
bool connected = atomic_read(&hidpp->connected);
|
|
struct input_dev *input;
|
|
char *name, *devm_name;
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
|
|
wtp_connect(hdev, connected);
|
|
|
|
if (!connected || hidpp->delayed_input)
|
|
return;
|
|
|
|
if (!hidpp->protocol_major) {
|
|
ret = !hidpp_is_connected(hidpp);
|
|
if (ret) {
|
|
hid_err(hdev, "Can not get the protocol version.\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* the device is already connected, we can ask for its name and
|
|
* protocol */
|
|
hid_info(hdev, "HID++ %u.%u device connected.\n",
|
|
hidpp->protocol_major, hidpp->protocol_minor);
|
|
|
|
input = hidpp_allocate_input(hdev);
|
|
if (!input) {
|
|
hid_err(hdev, "cannot allocate new input device: %d\n", ret);
|
|
return;
|
|
}
|
|
|
|
name = hidpp_get_device_name(hidpp);
|
|
if (!name) {
|
|
hid_err(hdev, "unable to retrieve the name of the device");
|
|
} else {
|
|
devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s", name);
|
|
if (devm_name)
|
|
input->name = devm_name;
|
|
kfree(name);
|
|
}
|
|
|
|
hidpp_populate_input(hidpp, input, false);
|
|
|
|
ret = input_register_device(input);
|
|
if (ret)
|
|
input_free_device(input);
|
|
|
|
hidpp->delayed_input = input;
|
|
}
|
|
|
|
static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
|
{
|
|
struct hidpp_device *hidpp;
|
|
int ret;
|
|
bool connected;
|
|
unsigned int connect_mask = HID_CONNECT_DEFAULT;
|
|
|
|
hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
|
|
GFP_KERNEL);
|
|
if (!hidpp)
|
|
return -ENOMEM;
|
|
|
|
hidpp->hid_dev = hdev;
|
|
hid_set_drvdata(hdev, hidpp);
|
|
|
|
hidpp->quirks = id->driver_data;
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
|
|
ret = wtp_allocate(hdev, id);
|
|
if (ret)
|
|
goto wtp_allocate_fail;
|
|
}
|
|
|
|
INIT_WORK(&hidpp->work, delayed_work_cb);
|
|
mutex_init(&hidpp->send_mutex);
|
|
init_waitqueue_head(&hidpp->wait);
|
|
|
|
ret = hid_parse(hdev);
|
|
if (ret) {
|
|
hid_err(hdev, "%s:parse failed\n", __func__);
|
|
goto hid_parse_fail;
|
|
}
|
|
|
|
/* Allow incoming packets */
|
|
hid_device_io_start(hdev);
|
|
|
|
connected = hidpp_is_connected(hidpp);
|
|
if (id->group != HID_GROUP_LOGITECH_DJ_DEVICE) {
|
|
if (!connected) {
|
|
hid_err(hdev, "Device not connected");
|
|
hid_device_io_stop(hdev);
|
|
goto hid_parse_fail;
|
|
}
|
|
|
|
hid_info(hdev, "HID++ %u.%u device connected.\n",
|
|
hidpp->protocol_major, hidpp->protocol_minor);
|
|
}
|
|
|
|
hidpp_overwrite_name(hdev, id->group == HID_GROUP_LOGITECH_DJ_DEVICE);
|
|
atomic_set(&hidpp->connected, connected);
|
|
|
|
if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
|
|
ret = wtp_get_config(hidpp);
|
|
if (ret)
|
|
goto hid_parse_fail;
|
|
}
|
|
|
|
/* Block incoming packets */
|
|
hid_device_io_stop(hdev);
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT)
|
|
connect_mask &= ~HID_CONNECT_HIDINPUT;
|
|
|
|
/* Re-enable hidinput for multi-input devices */
|
|
if (hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT)
|
|
connect_mask |= HID_CONNECT_HIDINPUT;
|
|
|
|
ret = hid_hw_start(hdev, connect_mask);
|
|
if (ret) {
|
|
hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
|
|
goto hid_hw_start_fail;
|
|
}
|
|
|
|
if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) {
|
|
/* Allow incoming packets */
|
|
hid_device_io_start(hdev);
|
|
|
|
hidpp_connect_event(hidpp);
|
|
}
|
|
|
|
return ret;
|
|
|
|
hid_hw_start_fail:
|
|
hid_parse_fail:
|
|
cancel_work_sync(&hidpp->work);
|
|
mutex_destroy(&hidpp->send_mutex);
|
|
wtp_allocate_fail:
|
|
hid_set_drvdata(hdev, NULL);
|
|
return ret;
|
|
}
|
|
|
|
static void hidpp_remove(struct hid_device *hdev)
|
|
{
|
|
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
|
|
|
|
cancel_work_sync(&hidpp->work);
|
|
mutex_destroy(&hidpp->send_mutex);
|
|
hid_hw_stop(hdev);
|
|
}
|
|
|
|
static const struct hid_device_id hidpp_devices[] = {
|
|
{ /* wireless touchpad */
|
|
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
|
|
USB_VENDOR_ID_LOGITECH, 0x4011),
|
|
.driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT |
|
|
HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS },
|
|
{ /* wireless touchpad T650 */
|
|
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
|
|
USB_VENDOR_ID_LOGITECH, 0x4101),
|
|
.driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
|
|
{ /* wireless touchpad T651 */
|
|
HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
|
|
USB_DEVICE_ID_LOGITECH_T651),
|
|
.driver_data = HIDPP_QUIRK_CLASS_WTP },
|
|
{ /* Keyboard TK820 */
|
|
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
|
|
USB_VENDOR_ID_LOGITECH, 0x4102),
|
|
.driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_MULTI_INPUT |
|
|
HIDPP_QUIRK_CLASS_WTP },
|
|
|
|
{ HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
|
|
USB_VENDOR_ID_LOGITECH, HID_ANY_ID)},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(hid, hidpp_devices);
|
|
|
|
static struct hid_driver hidpp_driver = {
|
|
.name = "logitech-hidpp-device",
|
|
.id_table = hidpp_devices,
|
|
.probe = hidpp_probe,
|
|
.remove = hidpp_remove,
|
|
.raw_event = hidpp_raw_event,
|
|
.input_configured = hidpp_input_configured,
|
|
.input_mapping = hidpp_input_mapping,
|
|
};
|
|
|
|
module_hid_driver(hidpp_driver);
|