234 lines
7.7 KiB
C
234 lines
7.7 KiB
C
/*
|
|
* HID routines for Mac OS X.
|
|
*
|
|
* Copyright (C) 2018 Serge Vakulenko, KK6ABQ
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <IOKit/hid/IOHIDManager.h>
|
|
#include "util.h"
|
|
|
|
static volatile IOHIDDeviceRef dev; // device handle
|
|
static unsigned char transfer_buf[42]; // device buffer
|
|
static unsigned char receive_buf[42]; // receive buffer
|
|
static volatile int nbytes_received = 0; // receive result
|
|
|
|
//
|
|
// Send a request to the device.
|
|
// Store the reply into the rdata[] array.
|
|
// Terminate in case of errors.
|
|
//
|
|
void hid_send_recv(const unsigned char *data, unsigned nbytes, unsigned char *rdata, unsigned rlength)
|
|
{
|
|
unsigned char buf[42];
|
|
unsigned k;
|
|
IOReturn result;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
buf[0] = 1;
|
|
buf[1] = 0;
|
|
buf[2] = nbytes;
|
|
buf[3] = nbytes >> 8;
|
|
if (nbytes > 0)
|
|
memcpy(buf+4, data, nbytes);
|
|
nbytes += 4;
|
|
|
|
if (trace_flag > 0) {
|
|
fprintf(stderr, "---Send");
|
|
for (k=0; k<nbytes; ++k) {
|
|
if (k != 0 && (k & 15) == 0)
|
|
fprintf(stderr, "\n ");
|
|
fprintf(stderr, " %02x", buf[k]);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
nbytes_received = 0;
|
|
memset(receive_buf, 0, sizeof(receive_buf));
|
|
again:
|
|
// Write to HID device.
|
|
result = IOHIDDeviceSetReport(dev, kIOHIDReportTypeOutput, 0, buf, sizeof(buf));
|
|
if (result != kIOReturnSuccess) {
|
|
fprintf(stderr, "HID output error: %d!\n", result);
|
|
exit(-1);
|
|
}
|
|
|
|
// Run main application loop until reply received.
|
|
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, 0);
|
|
for (k = 0; nbytes_received <= 0; k++) {
|
|
usleep(100);
|
|
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, 0);
|
|
if (k >= 1000) {
|
|
if (trace_flag > 0) {
|
|
fprintf(stderr, "No response from HID device!\n");
|
|
}
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
if (nbytes_received != sizeof(receive_buf)) {
|
|
fprintf(stderr, "Short read: %d bytes instead of %d!\n",
|
|
nbytes_received, (int)sizeof(receive_buf));
|
|
exit(-1);
|
|
}
|
|
if (trace_flag > 0) {
|
|
fprintf(stderr, "---Recv");
|
|
for (k=0; k<nbytes_received; ++k) {
|
|
if (k != 0 && (k & 15) == 0)
|
|
fprintf(stderr, "\n ");
|
|
fprintf(stderr, " %02x", receive_buf[k]);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
if (receive_buf[0] != 3 || receive_buf[1] != 0 || receive_buf[3] != 0) {
|
|
fprintf(stderr, "incorrect reply\n");
|
|
exit(-1);
|
|
}
|
|
if (receive_buf[2] != rlength) {
|
|
fprintf(stderr, "incorrect reply length %d, expected %d\n",
|
|
receive_buf[2], rlength);
|
|
exit(-1);
|
|
}
|
|
memcpy(rdata, receive_buf+4, rlength);
|
|
}
|
|
|
|
//
|
|
// Callback: data is received from the HID device
|
|
//
|
|
static void callback_input(void *context,
|
|
IOReturn result, void *sender, IOHIDReportType type,
|
|
uint32_t reportID, uint8_t *data, CFIndex nbytes)
|
|
{
|
|
if (result != kIOReturnSuccess) {
|
|
fprintf(stderr, "HID input error: %d!\n", result);
|
|
exit(-1);
|
|
}
|
|
|
|
if (nbytes > sizeof(receive_buf)) {
|
|
fprintf(stderr, "Too large HID input: %d bytes!\n", (int)nbytes);
|
|
exit(-1);
|
|
}
|
|
|
|
nbytes_received = nbytes;
|
|
if (nbytes > 0)
|
|
memcpy(receive_buf, data, nbytes);
|
|
}
|
|
|
|
//
|
|
// Callback: device specified in the matching dictionary has been added
|
|
//
|
|
static void callback_open(void *context,
|
|
IOReturn result, void *sender, IOHIDDeviceRef deviceRef)
|
|
{
|
|
IOReturn o = IOHIDDeviceOpen(deviceRef, kIOHIDOptionsTypeSeizeDevice);
|
|
if (o != kIOReturnSuccess) {
|
|
fprintf(stderr, "Cannot open HID device!\n");
|
|
exit(-1);
|
|
}
|
|
|
|
// Register input callback.
|
|
IOHIDDeviceRegisterInputReportCallback(deviceRef,
|
|
transfer_buf, sizeof(transfer_buf), callback_input, 0);
|
|
|
|
dev = deviceRef;
|
|
}
|
|
|
|
//
|
|
// Callback: device specified in the matching dictionary has been removed
|
|
//
|
|
static void callback_close(void *ontext,
|
|
IOReturn result, void *sender, IOHIDDeviceRef deviceRef)
|
|
{
|
|
// De-register input callback.
|
|
IOHIDDeviceRegisterInputReportCallback(deviceRef, transfer_buf, sizeof(transfer_buf), NULL, NULL);
|
|
}
|
|
|
|
//
|
|
// Launch the IOHIDManager.
|
|
//
|
|
int hid_init(int vid, int pid)
|
|
{
|
|
// Create the USB HID Manager.
|
|
IOHIDManagerRef HIDManager = IOHIDManagerCreate(kCFAllocatorDefault,
|
|
kIOHIDOptionsTypeNone);
|
|
|
|
// Create an empty matching dictionary for filtering USB devices in our HID manager.
|
|
CFMutableDictionaryRef matchDict = CFDictionaryCreateMutable(kCFAllocatorDefault,
|
|
2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
|
|
|
|
// Specify the USB device manufacturer and product in our matching dictionary.
|
|
CFDictionarySetValue(matchDict, CFSTR(kIOHIDVendorIDKey), CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &vid));
|
|
CFDictionarySetValue(matchDict, CFSTR(kIOHIDProductIDKey), CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &pid));
|
|
|
|
// Apply the matching to our HID manager.
|
|
IOHIDManagerSetDeviceMatching(HIDManager, matchDict);
|
|
CFRelease(matchDict);
|
|
|
|
// The HID manager will use callbacks when specified USB devices are connected/disconnected.
|
|
IOHIDManagerRegisterDeviceMatchingCallback(HIDManager, &callback_open, NULL);
|
|
IOHIDManagerRegisterDeviceRemovalCallback(HIDManager, &callback_close, NULL);
|
|
|
|
// Add the HID manager to the main run loop
|
|
IOHIDManagerScheduleWithRunLoop(HIDManager, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
|
|
|
|
// Open the HID mangager
|
|
IOReturn IOReturn = IOHIDManagerOpen(HIDManager, kIOHIDOptionsTypeNone);
|
|
if (IOReturn != kIOReturnSuccess) {
|
|
if (trace_flag) {
|
|
fprintf(stderr, "Cannot find USB device %04x:%04x\n", vid, pid);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
// Run main application loop until device found.
|
|
int k;
|
|
for (k=0; ; k++) {
|
|
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, 0);
|
|
if (dev)
|
|
return 0;
|
|
|
|
if (k >= 3) {
|
|
if (trace_flag) {
|
|
fprintf(stderr, "Cannot find USB device %04x:%04x\n", vid, pid);
|
|
}
|
|
return -1;
|
|
}
|
|
usleep(10000);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Close HID device.
|
|
//
|
|
void hid_close()
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
IOHIDDeviceClose(dev, kIOHIDOptionsTypeNone);
|
|
dev = 0;
|
|
}
|