ApplePS2Mouse * ApplePS2Mouse::probe(IOService * provider, SInt32 * score)
{
DEBUG_LOG("%s::probe called\n", getName());
//
// The driver has been instructed to verify the presence of the actual
// hardware we represent. We are guaranteed by the controller that the
// mouse clock is enabled and the mouse itself is disabled (thus it
// won't send any asynchronous mouse data that may mess up the
// responses expected by the commands we send it).
//
ApplePS2MouseDevice * device = (ApplePS2MouseDevice *)provider;
PS2Request * request = device->allocateRequest();
bool success;
if (!super::probe(provider, score)) return 0;
//
// Check to see if acknowledges are being received for commands to the mouse.
//
// (get information command)
request->commands[0].command = kPS2C_WriteCommandPort;
request->commands[0].inOrOut = kCP_TransmitToMouse;
request->commands[1].command = kPS2C_WriteDataPort;
request->commands[1].inOrOut = kDP_GetMouseInformation;
request->commands[2].command = kPS2C_ReadDataPortAndCompare;
request->commands[2].inOrOut = kSC_Acknowledge;
request->commands[3].command = kPS2C_ReadDataPort;
request->commands[3].inOrOut = 0;
request->commands[4].command = kPS2C_ReadDataPort;
request->commands[4].inOrOut = 0;
request->commands[5].command = kPS2C_ReadDataPort;
request->commands[5].inOrOut = 0;
request->commandsCount = 6;
device->submitRequestAndBlock(request);
// (free the request)
success = (request->commandsCount == 6);
device->freeRequest(request);
return (success) ? this : 0;
}
ApplePS2SynapticsTouchPad *
ApplePS2SynapticsTouchPad::probe( IOService * provider, SInt32 * score )
{
//
// The driver has been instructed to verify the presence of the actual
// hardware we represent. We are guaranteed by the controller that the
// mouse clock is enabled and the mouse itself is disabled (thus it
// won't send any asynchronous mouse data that may mess up the
// responses expected by the commands we send it).
//
ApplePS2MouseDevice * device = (ApplePS2MouseDevice *) provider;
PS2Request * request = device->allocateRequest();
bool success = false;
if (!super::probe(provider, score) || !request) return 0;
//
// Send an "Identify TouchPad" command and see if the device is
// a Synaptics TouchPad based on its response. End the command
// chain with a "Set Defaults" command to clear all state.
//
request->commands[0].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[0].inOrOut = kDP_SetDefaultsAndDisable;
request->commands[1].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[1].inOrOut = kDP_SetMouseResolution;
request->commands[2].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[2].inOrOut = 0;
request->commands[3].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[3].inOrOut = kDP_SetMouseResolution;
request->commands[4].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[4].inOrOut = 0;
request->commands[5].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[5].inOrOut = kDP_SetMouseResolution;
request->commands[6].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[6].inOrOut = 0;
request->commands[7].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[7].inOrOut = kDP_SetMouseResolution;
request->commands[8].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[8].inOrOut = 0;
request->commands[9].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[9].inOrOut = kDP_GetMouseInformation;
request->commands[10].command = kPS2C_ReadDataPort;
request->commands[10].inOrOut = 0;
request->commands[11].command = kPS2C_ReadDataPort;
request->commands[11].inOrOut = 0;
request->commands[12].command = kPS2C_ReadDataPort;
request->commands[12].inOrOut = 0;
request->commands[13].command = kPS2C_SendMouseCommandAndCompareAck;
request->commands[13].inOrOut = kDP_SetDefaultsAndDisable;
request->commandsCount = 14;
device->submitRequestAndBlock(request);
if ( request->commandsCount == 14 &&
request->commands[11].inOrOut == 0x47 )
{
_touchPadVersion = (request->commands[12].inOrOut & 0x0f) << 8
| request->commands[10].inOrOut;
//
// Only support 4.x or later touchpads.
//
if ( _touchPadVersion >= 0x400 ) success = true;
}
device->freeRequest(request);
return (success) ? this : 0;
}