52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 1993 Weitek Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
clock.h
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
This module contains clock generator specific functions for the
|
||
|
|
Weitek P9 miniport device driver.
|
||
|
|
|
||
|
|
Environment:
|
||
|
|
|
||
|
|
Kernel mode
|
||
|
|
|
||
|
|
Revision History may be found at the end of this file.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
//
|
||
|
|
// Masks used to program the ICD2061a Frequency Synthesizer.
|
||
|
|
//
|
||
|
|
|
||
|
|
#define IC_REG0 0x0l // Mask selects ICD Video Clock Reg 1
|
||
|
|
#define IC_REG1 0x200000l // Mask selects ICD Video Clock Reg 2
|
||
|
|
#define IC_REG2 0x400000l // Mask selects ICD Video Clock Reg 3
|
||
|
|
#define IC_MREG 0x600000l // Mask selects ICD Mem Timing Clock
|
||
|
|
#define IC_CNTL 0xc18000l // Mask selects ICD Control Register
|
||
|
|
#define IC_DIV4 0xa40000l
|
||
|
|
|
||
|
|
//
|
||
|
|
// These values are used to program custom frequencies
|
||
|
|
// and to select a custom frequency.
|
||
|
|
//
|
||
|
|
#define ICD2061_EXTSEL9100 (0x03)
|
||
|
|
#define ICD2061_DATA9100 (0x02)
|
||
|
|
#define ICD2061_DATASHIFT9100 (0x01)
|
||
|
|
#define ICD2061_CLOCK9100 (0x01)
|
||
|
|
|
||
|
|
//
|
||
|
|
// Define macros to access the ICD register. These macros take advantage
|
||
|
|
// of the fact that the synth bits are the same for the Weitek, Viper, and
|
||
|
|
// Ajax boards. The only difference is that the Ajax board's ICD register
|
||
|
|
// is mapped to a different base address.
|
||
|
|
//
|
||
|
|
|
||
|
|
#define WR_ICD(value) VGA_WR_REG(MISCOUT, (value))
|
||
|
|
|
||
|
|
#define RD_ICD() VGA_RD_REG(MISCIN)
|