dmrconfig/hid-macos.c
2018-09-17 23:07:42 -07:00

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;
}