158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
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#include <wdm.h>
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#include <smbus.h>
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#include <ec.h>
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#include <devioctl.h>
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#include <acpiioct.h>
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#define DEBUG 1
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//
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// Debuging
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//
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extern ULONG SMBHCDebug;
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#if DEBUG
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#define SmbPrint(l,m) if(l & SMBHCDebug) DbgPrint m
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#else
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#define SmbPrint(l,m)
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#endif
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//
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// Control methods used by EC
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//
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#define CM_EC_METHOD (ULONG) (0,'CE_')
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#define SMB_LOW 0x00000010
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#define SMB_STATE 0x00000020
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#define SMB_NOTE 0x00000001
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#define SMB_WARN 0x00000002
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#define SMB_ERROR 0x00000004
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//
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// SMB Host Controller interface definitions
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//
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typedef struct {
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UCHAR Protocol;
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UCHAR Status;
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UCHAR Address;
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UCHAR Command;
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UCHAR Data[SMB_MAX_DATA_SIZE];
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UCHAR BlockLength;
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UCHAR AlarmAddress;
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UCHAR AlarmData[2];
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} SMB_HC, *PSMB_HC;
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//
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// Protocol values
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//
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#define SMB_HC_NOT_BUSY 0x00
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#define SMB_HC_WRITE_QUICK 0x02 // quick cmd with data bit = 0
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#define SMB_HC_READ_QUICK 0x03 // quick cmd with data bit = 1
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#define SMB_HC_SEND_BYTE 0x04
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#define SMB_HC_RECEIVE_BYTE 0x05
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#define SMB_HC_WRITE_BYTE 0x06
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#define SMB_HC_READ_BYTE 0x07
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#define SMB_HC_WRITE_WORD 0x08
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#define SMB_HC_READ_WORD 0x09
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#define SMB_HC_WRITE_BLOCK 0x0A
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#define SMB_HC_READ_BLOCK 0x0B
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#define SMB_HC_PROCESS_CALL 0x0C
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//
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// Status field masks
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//
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#define SMB_DONE 0x80
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#define SMB_ALRM 0x40
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#define SMB_STATUS_MASK 0x1F
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//
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// SMB Host Controller Device object extenstion
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//
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typedef struct {
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PDEVICE_OBJECT DeviceObject;
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PDEVICE_OBJECT NextFdo;
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PDEVICE_OBJECT Pdo; //Pdo corresponding to this fdo
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PDEVICE_OBJECT LowerDeviceObject;
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PSMB_CLASS Class; // Shared class data
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//
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// Configuration information
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//
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UCHAR EcQuery; // EC Query value
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UCHAR EcBase; // EC Base value
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//
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// Miniport data
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//
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PIRP StatusIrp; // IRP in progress to read status without user irp
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UCHAR IoState; // Io state
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UCHAR IoWaitingState; // Io state once register read/write completed
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UCHAR IoStatusState; // Io state to revert to if idle status
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UCHAR IoReadData; // Size of data buffer read after complete status
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SMB_HC HcState; // Current host controller registers
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} SMB_DATA, *PSMB_DATA;
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//
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// IoState, IoWaitingState, IoStatusState, StatusState,
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//
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#define SMB_IO_INVALID 0
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#define SMB_IO_IDLE 1
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#define SMB_IO_CHECK_IDLE 2
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#define SMB_IO_WAITING_FOR_HC_REG_IO 3
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#define SMB_IO_WAITING_FOR_STATUS 4
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#define SMB_IO_START_TRANSFER 5
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#define SMB_IO_READ_STATUS 6
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#define SMB_IO_CHECK_STATUS 7
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#define SMB_IO_COMPLETE_REQUEST 8
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#define SMB_IO_COMPLETE_REG_IO 9
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#define SMB_IO_CHECK_ALARM 10
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#define SMB_IO_START_PROTOCOL 11
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//
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// Driver supports the following class driver version
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//
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#define SMB_HC_MAJOR_VERSION 0x0001
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#define SMB_HC_MINOR_VERSION 0x0000
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//
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// Prototypes
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//
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VOID
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SmbHcStartIo (
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IN PSMB_CLASS SmbClass,
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IN PVOID SmbMiniport
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);
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VOID
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SmbHcQueryEvent (
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IN ULONG QueryVector,
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IN PSMB_DATA SmbData
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);
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VOID
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SmbHcServiceIoLoop (
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IN PSMB_CLASS SmbClass,
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IN PSMB_DATA SmbData
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);
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