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/* ----------------------------------------------------------------------- *
*
* Copyright 2012 Intel Corporation; author: H. Peter Anvin
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
#ifndef _HW_VGA_H
#define _HW_VGA_H 1
#include <sys/io.h>
/* These are relative to the CRTC base address */
#define VGA_CRTC_ADDR 0x4
#define VGA_CRTC_DATA 0x5
#define VGA_CRTC_IX_HORIZ_TOTAL 0x00
#define VGA_CRTC_IX_END_HORIZ_DISPLAY 0x01
#define VGA_CRTC_IX_START_HORIZ_BLANK 0x02
#define VGA_CRTC_IX_END_HORIZ_BLANK 0x03
#define VGA_CRTC_IX_START_HORIZ_RETR 0x04
#define VGA_CRTC_IX_END_HORIZ_RETR 0x05
#define VGA_CRTC_IX_VERT_TOTAL 0x06
#define VGA_CRTC_IX_OVERFLOW 0x07
#define VGA_CRTC_IX_PRESET_ROW_SCAN 0x08
#define VGA_CRTC_IX_MAX_SCAN_LINE 0x09
#define VGA_CRTC_IX_CURSOR_START 0x0a
#define VGA_CRTC_IX_CURSOR_END 0x0b
#define VGA_CRTC_IX_START_ADDR_HIGH 0x0c
#define VGA_CRTC_IX_START_ADDR_LOW 0x0d
#define VGA_CRTC_IX_CURSOR_POS_HIGH 0x0e
#define VGA_CRTC_IX_CURSOR_POS_LOW 0x0f
#define VGA_CRTC_IX_START_VERT_RETR 0x10
#define VGA_CRTC_IX_END_VERT_RETR 0x11
#define VGA_CRTC_IX_END_VERT_DISPLAY 0x12
#define VGA_CRTC_IX_OFFSET 0x13
#define VGA_CRTC_IX_UNDERLINE 0x14
#define VGA_CRTC_IX_START_VERT_BLANK 0x15
#define VGA_CRTC_IX_END_VERT_BLANK 0x16
#define VGA_CRTC_IX_MODE_CONTROL 0x17
#define VGA_CRTC_IX_LINE_COMPARE 0x18
#define VGA_CRTC_INPUT_STATUS_1 0xa
#define VGA_CRTC_FEATURE_CONTROL_WRITE 0xa
#define VGA_ATTR_ADDR_DATA 0x3c0
#define VGA_ATTR_DATA_READ 0x3c1
/* 0x00-0x0f are 16->64 palette registers */
#define VGA_ATTR_IX_MODE_CONTROL 0x10
#define VGA_ATTR_IX_OVERSCAN 0x11
#define VGA_ATTR_IX_COLOR_PLANE_ENABLE 0x12
#define VGA_ATTR_IX_HORIZ_PIXEL_PAN 0x13
#define VGA_ADDR_IX_COLOR_SELECT 0x14
#define VGA_INPUT_STATUS_0 0x3c2
#define VGA_MISC_OUTPUT_WRITE 0x3c2
#define VGA_SEQ_ADDR 0x3c4
#define VGA_SEQ_DATA 0x3c5
#define VGA_SEQ_IX_RESET 0
#define VGA_SEQ_IX_CLOCKMODE 1
#define VGA_SEQ_IX_MAP_MASK 2
#define VGA_SEQ_IX_CHAR_MAP 3
#define VGA_SEQ_IX_SEQ_MEM_MODE 4
#define VGA_DAC_STATE 0x3c7
#define VGA_DAC_ADDR_READ_MODE 0x3c7
#define VGA_DAC_ADDR_WRITE_MODE 0x3c8
#define VGA_DAC_DATA 0x3c9
#define VGA_FEATURE_CONTROL_READ 0x3ca
#define VGA_MISC_OUTPUT_READ 0x3cc
#define VGA_GC_ADDR 0x3ce
#define VGA_GC_DATA 0x3cf
#define VGA_GC_IX_SET_RESET 0
#define VGA_GC_IX_ENABLE_SET_RESET 1
#define VGA_GC_IX_COLOR_COMPARE 2
#define VGA_GC_IX_DATA_ROTATE 3
#define VGA_GC_IX_READ_MAP_SELECT 4
#define VGA_GC_IX_GRAPHICS_MODE 5
#define VGA_GC_IX_MISC_GRAPHICS 6
#define VGA_GC_IX_COLOR_DONT_CARE 7
#define VGA_GC_IX_BIT_MASK 8
static inline uint16_t vga_crtc_base(void)
{
return 0x3b0 + ((inb(VGA_MISC_OUTPUT_READ) & 1) << 5);
}
#endif /* _HW_VGA_H */
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