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osx_ch341.cpp
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/*
* osx_ch341.cpp Winchiphead CH341 USB to serial adaptor driver for OS X
*
* Copyright 2015-2016, YuXiang Zhang <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Driver is inspired by the following projects:
* - osx-pl2303 Copyright (c) 2013 NoZAP B.V., Jeroen Arnoldus ([email protected], http://www.nozap.me http://www.nozap.nl )
* Copyright (c) 2006 BJA Electronics, Jeroen Arnoldus ([email protected])
* - Linux kernel ch341.c Copyright 2007, Frank A Kingswood <[email protected]>
* Copyright 2007, Werner Cornelius <[email protected]>
* Copyright 2009, Boris Hajduk <[email protected]>
*/
#include <IOKit/IOLib.h>
#include <IOKit/IOTypes.h>
#include <IOKit/IOMessage.h>
#include "osx_ch341.h"
#include <IOKit/serial/IOSerialKeys.h>
#include <IOKit/usb/IOUSBInterface.h>
#include <IOKit/usb/IOUSBLog.h>
#include <kern/clock.h>
extern "C" {
#include <pexpert/pexpert.h>
}
OSDefineMetaClassAndStructors(osx_wch_driver_ch341, IOSerialDriverSync)
/****************************************************************************************************/
//
// Function: Asciify
//
// Inputs: i - the nibble
//
// Outputs: return byte - ascii byte
//
// Desc: Converts to ascii.
//
/****************************************************************************************************/
static UInt8 Asciify(UInt8 i)
{
i &= 0xF;
if ( i < 10 )
return( '0' + i );
else return( 55 + i );
}/* end Asciify */
bool osx_wch_driver_ch341::init(OSDictionary *dict)
{
bool res = super::init(dict);
DEBUG_IOLog(4,"%s(%p)::Initializing\n", getName(), this);
return res;
}
void osx_wch_driver_ch341::free(void)
{
DEBUG_IOLog(4,"%s(%p)::Freeing\n", getName(), this);
super::free();
}
IOService *osx_wch_driver_ch341::probe(IOService *provider, SInt32 *score)
{
IOUSBDevice *Provider;
DEBUG_IOLog(4,"%s(%p)::Probe\n", getName(), this);
Provider = OSDynamicCast(IOUSBDevice, provider);
if (!Provider) {
IOLog("%s(%p)::Probe Attached to non-IOUSBDevice provider! Failing probe()\n", getName(), this);
return NULL;
}
IOService *res = super::probe(provider, score);
DEBUG_IOLog(5,"%s(%p)::Probe successful\n", getName(), this);
return res;
}
bool osx_wch_driver_ch341::start(IOService *provider)
{
fTerminate = false; // Make sure we don't think we're being terminated
fPort = NULL;
fNub = NULL;
fpInterface = NULL;
fpinterruptPipeBuffer = NULL;
fPipeInBuffer = NULL;
fPipeOutBuffer = NULL;
fpDevice = NULL;
fpInPipe = NULL;
fpOutPipe = NULL;
fpInterruptPipe = NULL;
fUSBStarted = false; // set to true when start finishes up ok
fSessions = 0;
fReadActive = false;
fWriteActive = false;
DEBUG_IOLog(4,"%s(%p)::start Driver\n", getName(), this);
if( !super::start( provider ) )
{
IOLog("%s(%p)::start - super failed\n", getName(), this);
goto Fail;
}
fpDevice = OSDynamicCast(IOUSBDevice, provider);
if(!fpDevice)
{
IOLog("%s(%p)::start - Provider isn't a USB device!!!\n", getName(), this);
goto Fail;
}
if (fpDevice->GetNumConfigurations() < 1)
{
IOLog("%s(%p)::start - no composite configurations\n", getName(), this);
goto Fail;
}
// make our nub (and fPort) now
if( !createNub() ) goto Fail;
// Now configure it (leaves device suspended)
if( !configureDevice( fpDevice->GetNumConfigurations() ) ) goto Fail;
// Finally create the bsd tty (serial stream) and leave it there until usb stop
if( !createSerialStream() ) goto Fail;
fWorkLoop = getWorkLoop();
if (!fWorkLoop)
{
IOLog("%s(%p)::start - getWorkLoop failed\n", getName(), this);
goto Fail;
}
fWorkLoop->retain();
fCommandGate = IOCommandGate::commandGate(this);
if (!fCommandGate)
{
IOLog("%s(%p)::start - create commandGate failed\n", getName(), this);
goto Fail;
}
if (fWorkLoop->addEventSource(fCommandGate) != kIOReturnSuccess)
{
IOLog("%s(%p)::start - addEventSource fCommandGate to WorkLoop failed\n", getName(), this);
goto Fail;
}
fCommandGate->enable();
fUSBStarted = true;
DEBUG_IOLog(5,"%s(%p)::start - Allocate resources \n", getName(), this);
return true;
Fail:
if (fNub)
{
destroyNub();
}
if (fCommandGate)
{
if(fWorkLoop){
DEBUG_IOLog(5,"%s(%p)::start - removeEventSource\n", getName(), this);
fWorkLoop->removeEventSource(fCommandGate);
}
fCommandGate->release();
fCommandGate = NULL;
}
if (fWorkLoop)
{
fWorkLoop->release();
fWorkLoop = NULL;
}
DEBUG_IOLog(1,"%s(%p)::start - failed\n", getName(), this);
stop( provider );
return false;
}
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::stop
//
// Inputs: provider - my provider
//
// Outputs: None
//
// Desc: Stops
//
/****************************************************************************************************/
void osx_wch_driver_ch341::stop( IOService *provider )
{
fUSBStarted = false; // reset usb start/stop flag for CheckSerialState
CheckSerialState(); // turn serial off, release resources
DEBUG_IOLog(5,"%s(%p)::stop CheckSerialState succeed\n", getName(), this);
if (fCommandGate)
{
if(fWorkLoop){
DEBUG_IOLog(5,"%s(%p)::stop - removeEventSource\n", getName(), this);
fWorkLoop->removeEventSource(fCommandGate);
}
fCommandGate->release();
fCommandGate = NULL;
DEBUG_IOLog(5,"%s(%p)::stop Command gate destroyed\n", getName(), this);
}
if (fWorkLoop)
{
fWorkLoop->release();
fWorkLoop = NULL;
DEBUG_IOLog(5,"%s(%p)::stop workloop destroyed\n", getName(), this);
}
destroySerialStream(); // release the bsd tty
destroyNub(); // delete the nubs and fPort
if (fpInterface)
{
fpInterface->release(); // retain done in ConfigureDevice
fpInterface = NULL;
DEBUG_IOLog(5,"%s(%p)::stop fpInterface destroyed\n", getName(), this);
}
// release our power manager state - NOT IMPLEMENTED
// PMstop();
super::stop( provider );
return;
}/* end stop */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::privateWatchState
//
// Inputs: port - the specified port, state - state watching for, mask - state mask (the specific bits)
//
// Outputs: IOReturn - kIOReturnSuccess, kIOReturnIOError or kIOReturnIPCError
//
// Desc: Wait for the at least one of the state bits defined in mask to be equal
// to the value defined in state. Check on entry then sleep until necessary.
// A return value of kIOReturnSuccess means that at least one of the port state
// bits specified by mask is equal to the value passed in by state. A return
// value of kIOReturnIOError indicates that the port went inactive. A return
// value of kIOReturnIPCError indicates sleep was interrupted by a signal.
//
/****************************************************************************************************/
IOReturn osx_wch_driver_ch341::privateWatchState( PortInfo_t *port, UInt32 *state, UInt32 mask )
{
unsigned watchState, foundStates;
bool autoActiveBit = false;
IOReturn rtn = kIOReturnSuccess;
DEBUG_IOLog(5,"%s(%p)::privateWatchState\n", getName(), this);
watchState = *state;
// hack to get around problem with carrier detection - Do we need this hack ??
if ( !(mask & (PD_S_ACQUIRED | PD_S_ACTIVE)) )
{
watchState &= ~PD_S_ACTIVE; // Check for low PD_S_ACTIVE
mask |= PD_S_ACTIVE; // Register interest in PD_S_ACTIVE bit
autoActiveBit = true;
}
for (;;)
{
// Check port state for any interesting bits with watchState value
// NB. the '^ ~' is a XNOR and tests for equality of bits.
DEBUG_IOLog(4,"%s(%p)::privateWatchState :watchState %u port->State %u mask %u\n", getName(), this, watchState,port->State,mask );
foundStates = (watchState ^ ~port->State) & mask;
DEBUG_IOLog(4,"%s(%p)::privateWatchState :foundStates %u \n", getName(), this, foundStates );
if ( foundStates )
{
*state = port->State;
if ( autoActiveBit && (foundStates & PD_S_ACTIVE) )
{
rtn = kIOReturnIOError;
} else {
rtn = kIOReturnSuccess;
}
break;
}
port->WatchStateMask |= mask;
retain(); // Just to make sure all threads are awake
fCommandGate->retain(); // before we're released
rtn = fCommandGate->commandSleep((void *)&port->State);
fCommandGate->retain();
if (rtn == THREAD_TIMED_OUT)
{
rtn = kIOReturnTimeout;
break;
} else {
if (rtn == THREAD_INTERRUPTED)
{
rtn = kIOReturnAborted;
break;
}
}
release();
}/* end for */
// As it is impossible to undo the masking used by this
// thread, we clear down the watch state mask and wakeup
// every sleeping thread to reinitialize the mask before exiting.
port->WatchStateMask = 0;
fCommandGate->commandWakeup((void *)&port->State);
DEBUG_IOLog(5,"%s(%p)::privateWatchState end\n", getName(), this);
return rtn;
}/* end privateWatchState */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::allocateResources
//
// Inputs:
//
// Outputs: return code - true (allocate was successful), false (it failed)
//
// Desc: Finishes up the rest of the configuration and gets all the endpoints open
//
/****************************************************************************************************/
bool osx_wch_driver_ch341::allocateResources( void )
{
IOUSBFindEndpointRequest epReq; // endPoint request struct on stack
bool goodCall; // return flag fm Interface call
vm_size_t aBuffSize;
DEBUG_IOLog(5,"%s(%p)::allocateResources\n", getName(), this);
// Open all the end points
if (!fpInterface) {
IOLog("%s(%p)::allocateResources failed - no fpInterface.\n", getName(), this);
goto Fail;
}
goodCall = fpInterface->open( this ); // close done in releaseResources
if ( !goodCall ){
IOLog("%s(%p)::allocateResources - open data interface failed.\n", getName(), this);
fpInterface->release();
fpInterface = NULL;
return false;
}
fpInterfaceNumber = fpInterface->GetInterfaceNumber();
epReq.type = kUSBBulk;
epReq.direction = kUSBIn;
epReq.maxPacketSize = 0;
epReq.interval = 0;
fpInPipe = fpInterface->FindNextPipe( 0, &epReq );
if (!fpInPipe) {
IOLog("%s(%p)::allocateResources failed - no fpInPipe.\n", getName(), this);
goto Fail;
}
epReq.direction = kUSBOut;
fpOutPipe = fpInterface->FindNextPipe( 0, &epReq );
if (!fpOutPipe) {
IOLog("%s(%p)::allocateResources failed - no fpOutPipe.\n", getName(), this);
goto Fail;
}
epReq.type = kUSBInterrupt;
epReq.direction = kUSBIn;
fpInterruptPipe = fpInterface->FindNextPipe( 0, &epReq );
if (!fpInterruptPipe) {
IOLog("%s(%p)::allocateResources failed - no fpInterruptPipe.\n", getName(), this);
goto Fail;
}
// Allocate Memory Descriptor Pointer with memory for the interrupt-in pipe:
aBuffSize = INTERRUPT_BUFF_SIZE;
fpinterruptPipeMDP = IOBufferMemoryDescriptor::withCapacity( aBuffSize, kIODirectionIn );
if (!fpinterruptPipeMDP) {
IOLog("%s(%p)::allocateResources failed - no fpinterruptPipeMDP.\n", getName(), this);
goto Fail;
}
fpinterruptPipeMDP->setLength( aBuffSize );
fpinterruptPipeBuffer = (UInt8*)fpinterruptPipeMDP->getBytesNoCopy();
// Allocate Memory Descriptor Pointer with memory for the data-in bulk pipe:
fpPipeInMDP = IOBufferMemoryDescriptor::withCapacity( USBLapPayLoad, kIODirectionIn );
if (!fpPipeInMDP) {
IOLog("%s(%p)::allocateResources failed - no fpPipeInMDP.\n", getName(), this);
goto Fail;
}
fpPipeInMDP->setLength( USBLapPayLoad );
fPipeInBuffer = (UInt8*)fpPipeInMDP->getBytesNoCopy();
// Allocate Memory Descriptor Pointer with memory for the data-out bulk pipe:
fpPipeOutMDP = IOBufferMemoryDescriptor::withCapacity( MAX_BLOCK_SIZE, kIODirectionOut );
if (!fpPipeOutMDP) {
IOLog("%s(%p)::allocateResources failed - no fpPipeOutMDP.\n", getName(), this);
goto Fail;
}
fpPipeOutMDP->setLength( MAX_BLOCK_SIZE );
fPipeOutBuffer = (UInt8*)fpPipeOutMDP->getBytesNoCopy();
// set up the completion info for all three pipes
if (!fPort) {
IOLog("%s(%p)::allocateResources failed - no fPort.\n", getName(), this);
goto Fail;
}
finterruptCompletionInfo.target = this;
finterruptCompletionInfo.action = interruptReadComplete;
finterruptCompletionInfo.parameter = fPort;
fReadCompletionInfo.target = this;
fReadCompletionInfo.action = dataReadComplete;
fReadCompletionInfo.parameter = fPort;
fWriteCompletionInfo.target = this;
fWriteCompletionInfo.action = dataWriteComplete;
fWriteCompletionInfo.parameter = fPort;
if( setSerialConfiguration() ){
IOLog("%s(%p)::allocateResources setSerialConfiguration failed\n", getName(), this);
goto Fail;
}
DEBUG_IOLog(5,"%s(%p)::allocateResources successful\n", getName(), this);
return true;
Fail:
return false;
} // allocateResources
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::releaseResources
//
// Inputs: port - the Port
//
// Outputs: None
//
// Desc: Frees up the pipe resources allocated in allocateResources
//
/****************************************************************************************************/
void osx_wch_driver_ch341::releaseResources( void )
{
DEBUG_IOLog(5,"osx_wch_driver_ch341::releaseResources\n");
if ( fpInterface ) {
fpInterface->close( this );
}
if ( fpPipeOutMDP ) {
fpPipeOutMDP->release();
fpPipeOutMDP = 0;
}
if ( fpPipeInMDP ) {
fpPipeInMDP->release();
fpPipeInMDP = 0;
}
if ( fpinterruptPipeMDP ) {
fpinterruptPipeMDP->release();
fpinterruptPipeMDP = 0;
}
return;
}/* end releaseResources */
void osx_wch_driver_ch341::stopSerial( bool resetDevice )
{
DEBUG_IOLog(4,"%s(%p)::stopSerial\n", getName(), this);
stopPipes(); // stop reading on the usb pipes
if (fpPipeOutMDP != NULL) // better test for releaseResources?
{
releaseResources( );
}
DEBUG_IOLog(5,"%s(%p)::stopSerial stopSerial succeed\n", getName(), this);
Fail:
return;
}
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::CheckSerialState
//
// Inputs: open session count (fSessions)
// usb start/stop (fStartStopUSB) -- replace with fTerminate?
//
// Outputs:
//
// Desc: Turns Serial on or off if appropriate
//
/****************************************************************************************************/
IOReturn osx_wch_driver_ch341::CheckSerialState( void )
{
Boolean newState = fUSBStarted & // usb must have started, and
// (fPowerState == kIrDAPowerOnState) & // powered on by the power manager, and
(fSessions > 0); // one of the clients too
DEBUG_IOLog(5,"%s(%p)::CheckSerialState\n", getName(), this);
if ( newState ){
fTerminate = false;
if ( !startSerial() )
{
fTerminate = true;
IOLog("%s(%p)::CheckSerialState - StartSerial failed\n", getName(), this);
} else {
DEBUG_IOLog(5,"%s(%p)::CheckSerialState - StartSerial successful\n", getName(), this);
}
} else if (!newState && !fTerminate) // Turn Serial off if needed
{
DEBUG_IOLog(5,"%s(%p)::CheckSerialState - StopSerial\n", getName(), this);
fTerminate = true; // Make it look like we've been terminated
stopSerial(true); // stop irda and stop pipe i/o
DEBUG_IOLog(5,"%s(%p)::CheckSerialState - StopSerial successful\n", getName(), this);
}
return kIOReturnSuccess;
// return ior;
}/* end CheckSerialState */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::configureDevice
//
// Inputs: numconfigs - number of configurations present
//
// Outputs: return Code - true (device configured), false (device not configured)
//
// Desc: Finds the configurations and then the appropriate interfaces etc.
//
/****************************************************************************************************/
bool osx_wch_driver_ch341::configureDevice( UInt8 numConfigs )
{
IOUSBFindInterfaceRequest req; // device request Class on stack
const IOUSBConfigurationDescriptor *cd = NULL; // configuration descriptor
IOUSBInterfaceDescriptor *intf = NULL; // interface descriptor
IOReturn ior;
UInt8 cval;
UInt8 config = 0;
DEBUG_IOLog(4,"%s(%p)::configureDevice\n", getName(), this);
for (cval=0; cval<numConfigs; cval++)
{
cd = fpDevice->GetFullConfigurationDescriptor(cval);
if ( !cd )
{
IOLog("%s(%p)::configureDevice - Error getting the full configuration descriptor\n", getName(), this);
}
else {
// Find the first one - there may be more to go on in the future
req.bInterfaceClass = kIOUSBFindInterfaceDontCare;
req.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
req.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
req.bAlternateSetting = kIOUSBFindInterfaceDontCare;
ior = fpDevice->FindNextInterfaceDescriptor(cd, intf, &req, &intf);
if ( ior == kIOReturnSuccess )
{
if ( intf ){
config = cd->bConfigurationValue;
DEBUG_IOLog(5,"%s(%p)::configureDevice - Interface descriptor found\n", getName(), this);
break;
} else {
DEBUG_IOLog(5,"%s(%p)::configureDevice - That's weird the interface was null\n", getName(), this);
cd = NULL;
}
} else {
IOLog("%s(%p)::configureDevice - No CDC interface found this configuration\n", getName(), this);
cd = NULL;
}
}
}
if ( !cd )
{
goto Fail;
}
// Now lets do it for real
req.bInterfaceClass = kIOUSBFindInterfaceDontCare;
req.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
req.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
req.bAlternateSetting = kIOUSBFindInterfaceDontCare;
fpInterface = fpDevice->FindNextInterface( NULL, &req );
if ( !fpInterface )
{
DEBUG_IOLog(4,"%s(%p)::configureDevice - Find next interface failed open device and reallocate objects\n", getName(), this);
if (!fpDevice->open(fpDevice))
{
IOLog("%s(%p)::configureDevice - unable to open device for configuration \n", getName(), this);
goto Fail;
}
IOReturn rtn = fpDevice->SetConfiguration(fpDevice, fpDevice->GetFullConfigurationDescriptor(0)->bConfigurationValue, true);
if (rtn)
{
IOLog("%s(%p)::configureDevice - unable to set the configuration\n", getName(), this);
goto Fail;
}
fpInterface = fpDevice->FindNextInterface( NULL, &req );
if ( !fpInterface )
{
IOLog("%s(%p)::configureDevice - Find interface failed\n", getName(), this);
goto Fail;
} else {
DEBUG_IOLog(5,"%s(%p)::configureDevice Interface found\n", getName(), this);
}
} else {
DEBUG_IOLog(5,"%s(%p)::configureDevice Interface found\n", getName(), this);
}
IOLog("%s(%p)::configureDevice OK, fpInterface:%p\n", getName(), this, fpInterface);
fpInterface->retain(); // release done in stop()
return true;
Fail:
return false;
}/* end configureDevice */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::createNub
//
// Inputs:
//
// Outputs: fNub and fPort
//
// Desc: allocates and inits, but doesn't publish the BSD info on the nub yet
// create serial stream finishes the job later.
//
/****************************************************************************************************/
bool osx_wch_driver_ch341::createNub(void)
{
DEBUG_IOLog(4,"%s(%p)::createNub\n", getName(), this);
if (fNub == NULL) {
fNub = new IORS232SerialStreamSync;
}
if( !fNub ) goto Fail;
if (fPort == NULL) {
fPort = (PortInfo_t*)IOMalloc( sizeof(PortInfo_t) );
}
if( !fPort ) goto Fail;
bzero(fPort, sizeof(PortInfo_t));
if( !fNub->init(0, fPort ) ) goto Fail;
if( !fNub->attach( this ) ) goto Fail;
return true;
Fail:
IOLog("%s(%p)::Createnub failed\n", getName(), this);
// could try and clean up here, but let's start by just not crashing.
return false;
}
void osx_wch_driver_ch341::destroyNub()
{
DEBUG_IOLog(4,"%s(%p)::destroyNub Try to destroy nub\n", getName(), this);
if (fPort != NULL) {
IOFree( fPort, sizeof(PortInfo_t) );
fPort = NULL;
DEBUG_IOLog(5,"%s(%p)::destroyNub fPort reset \n", getName(), this);
}
if (fNub) {
fNub->detach(this);
fNub->release(); // crash boom?
fNub = NULL;
DEBUG_IOLog(5,"%s(%p)::destroyNub Nub destroyed \n", getName(), this);
}
}
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::createSuffix
//
// Inputs: None
//
// Outputs: return Code - true (suffix created), false (suffix not create), sufKey - the key
//
// Desc: Creates the suffix key. It attempts to use the serial number string from the device
// if it's reasonable i.e. less than 8 bytes ascii. Remember it's stored in unicode
// format. If it's not present or not reasonable it will generate the suffix based
// on the location property tag. At least this remains the same across boots if the
// device is plugged into the same physical location. In the latter case trailing
// zeros are removed.
//
/****************************************************************************************************/
bool osx_wch_driver_ch341::createSuffix( unsigned char *sufKey )
{
IOReturn rc;
UInt8 serBuf[10]; // arbitrary size > 8
OSNumber *location;
UInt32 locVal;
UInt8 *rlocVal;
UInt16 offs, i, sig = 0;
UInt8 indx;
bool keyOK = false;
DEBUG_IOLog(4,"%s(%p)::createSuffix\n", getName(), this);
indx = fpDevice->GetSerialNumberStringIndex();
DEBUG_IOLog(5,"%s(%p)::createSuffix the index of string descriptor describing the device's serial number: %d\n", getName(), this, indx );
if (indx != 0 )
{
// Generate suffix key based on the serial number string (if reasonable <= 8 and > 0)
rc = fpDevice->GetStringDescriptor(indx, (char *)&serBuf, sizeof(serBuf));
if ( !rc )
{
DEBUG_IOLog(5,"%s(%p)::createSuffix serial number: %s\n", getName(), this, serBuf );
int serBufLength = strlen((char *)&serBuf);
if ( (serBufLength > 0) && (serBufLength < 9) )
{
strncpy( (char *)sufKey, (const char *)&serBuf, serBufLength);
keyOK = true;
}
} else {
IOLog("%s(%p)::createSuffix error reading serial number string\n", getName(), this );
}
}
if ( !keyOK )
{
// Generate suffix key based on the location property tag
location = (OSNumber *)fpDevice->getProperty(kUSBDevicePropertyLocationID);
DEBUG_IOLog(5,"%s(%p)::createSuffix location number: %p\n", getName(), this, location );
if ( location )
{
locVal = location->unsigned32BitValue();
offs = 0;
rlocVal = (UInt8*)&locVal;
for (i=0; i<4; i++)
{
sufKey[offs] = Asciify(rlocVal[i] >> 4);
if ( sufKey[offs++] != '0')
sig = offs;
sufKey[offs] = Asciify(rlocVal[i]);
if ( sufKey[offs++] != '0')
sig = offs;
}
sufKey[sig] = 0x00;
keyOK = true;
}
}
DEBUG_IOLog(4,"%s(%p)::createSuffix the suffix: %s\n", getName(), this, sufKey );
return keyOK;
}/* end createSuffix */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::SetStructureDefaults
//
// Inputs: port - the port to set the defaults, Init - Probe time or not
//
// Outputs: None
//
// Desc: Sets the defaults for the specified port structure
//
/****************************************************************************************************/
void osx_wch_driver_ch341::SetStructureDefaults( PortInfo_t *port, bool Init )
{
UInt32 tmp;
DEBUG_IOLog(4,"%s(%p)::SetStructureDefaults\n", getName(), this);
/* These are initialized when the port is created and shouldn't be reinitialized. */
if ( Init )
{
DEBUG_IOLog(4,"%s(%p)::SetStructureDefaults INIT\n", getName(), this);
port->FCRimage = 0x00;
port->IERmask = 0x00;
port->State = ( PD_S_TXQ_EMPTY | PD_S_TXQ_LOW_WATER | PD_S_RXQ_EMPTY | PD_S_RXQ_LOW_WATER );
port->WatchStateMask = 0x00000000;
port->lineState = 0x00;
// port->serialRequestLock = 0;
}
port->BaudRate = kDefaultBaudRate; // 9600 bps
port->CharLength = 8; // 8 Data bits
port->StopBits = 2; // 1 Stop bit
port->TX_Parity = 1; // No Parity
port->RX_Parity = 1; // --ditto--
port->MinLatency = false;
port->XONchar = kXOnChar;
port->XOFFchar = kXOffChar;
port->RXOstate = kXO_Idle;
port->TXOstate = kXO_Idle;
port->FrameTOEntry = NULL;
port->RXStats.BufferSize = kMaxCirBufferSize;
port->RXStats.HighWater = (port->RXStats.BufferSize << 1) / 3;
port->RXStats.LowWater = port->RXStats.HighWater >> 1;
port->TXStats.BufferSize = kMaxCirBufferSize;
port->TXStats.HighWater = (port->RXStats.BufferSize << 1) / 3;
port->TXStats.LowWater = port->RXStats.HighWater >> 1;
port->FlowControl = (DEFAULT_AUTO | DEFAULT_NOTIFY);
port->FlowControlState = CONTINUE_SEND;
port->DCDState = false;
port->BreakState = false;
port->xOffSent = false;
port->RTSAsserted = true;
port->DTRAsserted = true;
port->AreTransmitting = FALSE;
for ( tmp=0; tmp < (256 >> SPECIAL_SHIFT); tmp++ )
port->SWspecial[ tmp ] = 0;
DEBUG_IOLog(5,"%s(%p)::SetStructureDefaults finished\n", getName(), this);
return;
}/* end SetStructureDefaults */
/****************************************************************************************************/
//
// Method: osx_wch_driver_ch341::createSerialStream
//
// Inputs: None
//
// Outputs: return Code - true (created and initialilzed ok), false (it failed)
//
// Desc: Creates and initializes the nub and port structure
//
/****************************************************************************************************/
bool osx_wch_driver_ch341::createSerialStream()
{
UInt8 indx;
IOReturn rc;
unsigned char rname[10];
const char *suffix = (const char *)&rname;
DEBUG_IOLog(4,"%s(%p)::createSerialStream\n", getName(), this);
if (!fNub || !fPort) return false;
SetStructureDefaults( fPort, true ); // init the Port structure
// Allocate the request lock
fPort->serialRequestLock = IOLockAlloc(); // init lock used to protect code on MP
if ( !fPort->serialRequestLock )
{
return false;
}
// now the ring buffers
if (!allocateRingBuffer(&(fPort->TX), fPort->TXStats.BufferSize) ||
!allocateRingBuffer(&(fPort->RX), fPort->RXStats.BufferSize))
{
DEBUG_IOLog(3,"%s(%p)::createSerialStream init ring buffers failed\n", getName(), this);
return false;
}
if ( !fTerminate )
{
// Report the base name to be used for generating device nodes
fNub->setProperty( kIOTTYBaseNameKey, baseName );
// Create suffix key and set it
if ( createSuffix( (unsigned char *)suffix ) )
{
fNub->setProperty( kIOTTYSuffixKey, suffix );
}
// Save the Product String (at least the first productNameLength's worth).
indx = fpDevice->GetProductStringIndex();
if ( indx != 0 )
{
rc = fpDevice->GetStringDescriptor( indx, (char *)&fProductName, sizeof(fProductName) );
if ( !rc )
{
DEBUG_IOLog(4,"%s(%p)::createSerialStream product name: %s\n", getName(), this, fProductName);
if ( strlen((char *)fProductName) == 0 ) // believe it or not this sometimes happens (null string with an index defined???)
{
strncpy( (char *)fProductName, defaultName, (size_t) productNameLength);
}
fNub->setProperty( (const char *)propertyTag, (const char *)fProductName );
}
}
fNub->registerService();
}
return true;
}/* end createSerialStream */
//
// release things created in createSerialStream
//
void
osx_wch_driver_ch341::destroySerialStream(void)