IOCDMediaBSDClient.cpp [plain text]
#include <sys/errno.h>
#include <IOKit/storage/IOCDMediaBSDClient.h>
#define super IOMediaBSDClient
OSDefineMetaClassAndStructors(IOCDMediaBSDClient, IOMediaBSDClient)
static bool DKIOC_IS_RESERVED(caddr_t data, u_int16_t reserved)
{
UInt32 index;
for ( index = 0; index < sizeof(reserved) * 8; index++, reserved >>= 1 )
{
if ( (reserved & 1) )
{
if ( data[index] ) return true;
}
}
return false;
}
static IOMemoryDescriptor * DKIOC_PREPARE_BUFFER( void * address,
UInt32 length,
IODirection direction )
{
IOMemoryDescriptor * buffer = 0;
if ( address && length )
{
buffer = IOMemoryDescriptor::withAddress( (vm_address_t) address,
length,
direction,
current_task() );
}
if ( buffer )
{
if ( buffer->prepare() != kIOReturnSuccess ) {
buffer->release();
buffer = 0;
}
}
return buffer;
}
static void DKIOC_COMPLETE_BUFFER(IOMemoryDescriptor * buffer)
{
if ( buffer )
{
buffer->complete(); buffer->release(); }
}
IOCDMedia * IOCDMediaBSDClient::getProvider() const
{
return (IOCDMedia *) IOService::getProvider();
}
int IOCDMediaBSDClient::ioctl( dev_t dev,
u_long cmd,
caddr_t data,
int flags,
proc_t proc )
{
IOMemoryDescriptor * buffer = 0;
int error = 0;
IOReturn status = kIOReturnSuccess;
switch ( cmd )
{
case DKIOCCDREAD: {
UInt64 actualByteCount = 0;
dk_cd_read_t * request = (dk_cd_read_t *) data;
if ( DKIOC_IS_RESERVED(data, 0xFC00) ) { error = EINVAL; break; }
buffer = DKIOC_PREPARE_BUFFER(
request->buffer,
request->bufferLength,
kIODirectionIn );
status = getProvider()->readCD(
this,
request->offset,
buffer,
(CDSectorArea) request->sectorArea,
(CDSectorType) request->sectorType,
&actualByteCount );
status = (status == kIOReturnUnderrun) ? kIOReturnSuccess : status;
request->bufferLength = (UInt32) actualByteCount;
DKIOC_COMPLETE_BUFFER(buffer);
} break;
case DKIOCCDREADISRC: {
dk_cd_read_isrc_t * request = (dk_cd_read_isrc_t *) data;
if ( DKIOC_IS_RESERVED(data, 0xC000) ) { error = EINVAL; break; }
status = getProvider()->readISRC(request->track, request->isrc);
} break;
case DKIOCCDREADMCN: {
dk_cd_read_mcn_t * request = (dk_cd_read_mcn_t *) data;
if ( DKIOC_IS_RESERVED(data, 0xC000) ) { error = EINVAL; break; }
status = getProvider()->readMCN(request->mcn);
} break;
case DKIOCCDGETSPEED: {
status = getProvider()->getSpeed((u_int16_t *)data);
} break;
case DKIOCCDSETSPEED: {
status = getProvider()->setSpeed(*(u_int16_t *)data);
} break;
case DKIOCCDREADTOC: {
dk_cd_read_toc_t * request = (dk_cd_read_toc_t *) data;
if ( DKIOC_IS_RESERVED(data, 0x037C) ) { error = EINVAL; break; }
buffer = DKIOC_PREPARE_BUFFER(
request->buffer,
request->bufferLength,
kIODirectionIn );
status = getProvider()->readTOC(
buffer,
request->format,
request->formatAsTime,
request->address.session,
&request->bufferLength );
status = (status == kIOReturnUnderrun) ? kIOReturnSuccess : status;
DKIOC_COMPLETE_BUFFER(buffer);
} break;
case DKIOCCDREADDISCINFO: {
dk_cd_read_disc_info_t * request = (dk_cd_read_disc_info_t *) data;
if ( DKIOC_IS_RESERVED(data, 0x03FF) ) { error = EINVAL; break; }
buffer = DKIOC_PREPARE_BUFFER(
request->buffer,
request->bufferLength,
kIODirectionIn );
status = getProvider()->readDiscInfo(
buffer,
&request->bufferLength );
status = (status == kIOReturnUnderrun) ? kIOReturnSuccess : status;
DKIOC_COMPLETE_BUFFER(buffer);
} break;
case DKIOCCDREADTRACKINFO: {
dk_cd_read_track_info_t * request;
request = (dk_cd_read_track_info_t *) data;
if ( DKIOC_IS_RESERVED(data, 0x020F) ) { error = EINVAL; break; }
buffer = DKIOC_PREPARE_BUFFER(
request->buffer,
request->bufferLength,
kIODirectionIn );
status = getProvider()->readTrackInfo(
buffer,
request->address,
request->addressType,
&request->bufferLength );
status = (status == kIOReturnUnderrun) ? kIOReturnSuccess : status;
DKIOC_COMPLETE_BUFFER(buffer);
} break;
default:
{
error = super::ioctl(dev, cmd, data, flags, proc);
} break;
}
return error ? error : getProvider()->errnoFromReturn(status);
}
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 0);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 1);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 2);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 3);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 4);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 5);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 6);
OSMetaClassDefineReservedUnused(IOCDMediaBSDClient, 7);