/* ----------------------------------------------------------------------- *
*
* Copyright 1999-2012 H. Peter Anvin - All Rights Reserved
* Chandramouli Narayanan - extended for EFI support
*
* 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.
*
* ----------------------------------------------------------------------- */
#include <inttypes.h>
#include <com32.h>
#include <stdlib.h>
#include <string.h>
#include <sys/fpu.h>
#include <syslinux/video.h>
#include <dprintf.h>
#include "efi.h"
/* We use cp865_8x16.psf as the standard font for EFI implementation
* the header file below contains raw data parsed from cp865_8x16.psf
*/
#include "cp865_8x16.h"
#include "sys/vesa/vesa.h"
#include "sys/vesa/video.h"
#include "sys/vesa/fill.h"
#include "sys/vesa/debug.h"
/* EFI GOP support
* Note GOP support uses the VESA info structure as much as possible and
* extends it as needed for EFI support. Not all of the vesa info structure
* is populated. Care must be taken in the routines that rely the vesa
* informataion structure
*/
static void find_pixmask_bits(uint32_t mask, uint8_t *first_bit, uint8_t *len) {
uint8_t bit_pos = 0, bit_len = 0;
*first_bit = 0;
*len = 0;
if (mask == 0)
return;
while (!(mask & 0x1)) {
mask = mask >> 1;
bit_pos++;
}
while (mask & 0x1) {
mask = mask >> 1;
bit_len++;
}
*first_bit = bit_pos;
*len = bit_len;
}
unsigned long lfb_size;
uint16_t lfb_line_size;
uint8_t lfb_rsize;
uint8_t lfb_gsize;
uint8_t lfb_bsize;
uint8_t lfb_resv_size;
static int efi_vesacon_set_mode(struct vesa_info *vesa_info, int *x, int *y,
enum vesa_pixel_format *bestpxf)
{
EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *gop_mode;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info;
EFI_STATUS st;
UINT32 mode_num = 0, bestmode;
BOOLEAN mode_match = FALSE;
UINTN sz_info;
struct vesa_info *vi;
struct vesa_mode_info *mi;
int err = 0;
//debug("Hello, World!\r\n");
/* At this point, we assume that gnu-efi library is initialized */
st = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
if (EFI_ERROR(st)) {
debug("LiblocateProtocol for GOP failed %d\n", st);
return 1; /* function call failed */
}
/* We use the VESA info structure to store relevant GOP info as much as possible */
gop_mode = GraphicsOutput->Mode;
mode_info = gop_mode->Info;
dprintf("mode %d version %d pixlfmt %d hres=%d vres=%d\n", mode_num,
mode_info->Version, mode_info->PixelFormat,
mode_info->HorizontalResolution, mode_info->VerticalResolution);
/* simply pick the best mode that suits the caller's resolution */
for (mode_num = 0; mode_num < gop_mode->MaxMode; mode_num++) {
st = uefi_call_wrapper(GraphicsOutput->QueryMode, 4, GraphicsOutput, mode_num, &sz_info, &mode_info);
debug("mode_num = %d query_status %d\n", mode_num, st);
if (st == EFI_SUCCESS && sz_info >= sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION)) {
/* For now, simply pick the best mode that suits caller's resolution (x,y)
* FIXME: Consider any additional criteria for matching mode
*/
mode_match = ((uint32_t)*x == mode_info->HorizontalResolution && (uint32_t)*y == mode_info->VerticalResolution);
debug("mode %d hres=%d vres=%d\n", mode_num, mode_info->HorizontalResolution, mode_info->VerticalResolution);
if (mode_match) {
bestmode = mode_num;
break;
}
}
}
if (!mode_match) {
/* Instead of bailing out, set the mode to the system default.
* Some systems do not have support for 640x480 for instance
* This code deals with such cases.
*/
mode_info = gop_mode->Info;
*x = mode_info->HorizontalResolution;
*y = mode_info->VerticalResolution;
bestmode = gop_mode->Mode;
debug("No matching mode, setting to available default mode %d (x=%d, y=%d)\n", bestmode, *x, *y);
}
/* Allocate space in the bounce buffer for these structures */
vi = malloc(sizeof(*vi));
if (!vi) {
err = 10; /* Out of memory */
goto exit;
}
/* Note that the generic info is untouched as we don't find any relevance to EFI */
mi = &vi->mi;
/* Set up mode-specific information */
mi->h_res = *x;
mi->v_res = *y;
mi->lfb_ptr = (uint8_t *)(VOID *)(UINTN)gop_mode->FrameBufferBase;
lfb_size = gop_mode->FrameBufferSize;
/* FIXME:
* The code below treats bpp == lfb_depth ; verify
*/
switch (mode_info->PixelFormat) {
case PixelRedGreenBlueReserved8BitPerColor:
dprintf("RGB8bit ");
mi->mode_attr = 0x0080; /* supports physical frame buffer */
mi->bpp = sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL) * 8;
mi->rpos = 0;
mi->gpos = 8;
mi->bpos = 16;
mi->resv_pos = 24;
lfb_resv_size = 8;
mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
*bestpxf = PXF_BGRA32;
dprintf("bpp %d pixperScanLine %d logical_scan %d bytesperPix %d\n", mi->bpp, mode_info->PixelsPerScanLine,
mi->logical_scan, (mi->bpp + 7)>>3);
break;
case PixelBlueGreenRedReserved8BitPerColor:
dprintf("BGR8bit ");
mi->mode_attr = 0x0080; /* supports physical frame buffer */
mi->bpp = sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL) * 8;
mi->bpos = 0;
mi->gpos = 8;
mi->rpos = 16;
mi->resv_pos = 24;
lfb_resv_size = 8;
mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
*bestpxf = PXF_BGRA32;
dprintf("bpp %d pixperScanLine %d logical_scan %d bytesperPix %d\n", mi->bpp, mode_info->PixelsPerScanLine,
mi->logical_scan, (mi->bpp + 7)>>3);
break;
case PixelBitMask:
mi->mode_attr = 0x0080; /* supports physical frame buffer */
dprintf("RedMask 0x%x GrnMask 0x%x BluMask 0x%x RsvMask 0x%x\n",
mode_info->PixelInformation.RedMask,
mode_info->PixelInformation.GreenMask,
mode_info->PixelInformation.BlueMask,
mode_info->PixelInformation.ReservedMask);
find_pixmask_bits(mode_info->PixelInformation.RedMask,
&mi->rpos, &lfb_rsize);
find_pixmask_bits(mode_info->PixelInformation.GreenMask,
&mi->gpos, &lfb_gsize);
find_pixmask_bits(mode_info->PixelInformation.BlueMask,
&mi->bpos, &lfb_bsize);
find_pixmask_bits(mode_info->PixelInformation.ReservedMask,
&mi->resv_pos, &lfb_resv_size);
mi->bpp = lfb_rsize + lfb_gsize +
lfb_bsize + lfb_resv_size;
mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
dprintf("RPos %d Rsize %d GPos %d Gsize %d\n", mi->rpos, lfb_rsize, mi->gpos, lfb_gsize);
dprintf("BPos %d Bsize %d RsvP %d RsvSz %d\n", mi->bpos, lfb_bsize, mi->resv_pos, lfb_resv_size);
dprintf("bpp %d logical_scan %d bytesperPix %d\n", mi->bpp, mi->logical_scan, (mi->bpp + 7)>>3);
switch (mi->bpp) {
case 32:
*bestpxf = PXF_BGRA32;
break;
case 24:
*bestpxf = PXF_BGR24;
break;
case 16:
*bestpxf = PXF_LE_RGB16_565;
break;
default:
dprintf("Unable to handle bits per pixel %d, bailing out\n", mi->bpp);
err = 4;
goto exit;
}
break;
case PixelBltOnly:
/* FIXME: unsupported */
mi->mode_attr = 0x0000; /* no support for physical frame buffer */
err = 4; /* no mode found */
goto exit;
break;
default:
/* should not get here, but let's error out */
err = 4; /* no mode found */
goto exit;
break;
}
memcpy(&vesa_info->mi, mi, sizeof *mi);
/* Now set video mode */
st = uefi_call_wrapper(GraphicsOutput->SetMode, 2, GraphicsOutput, bestmode);
if (EFI_ERROR(st)) {
err = 9; /* Failed to set mode */
dprintf("Failed to set mode %d\n", bestmode);
goto exit;
}
/* TODO: Follow the code usage of vesacon_background & vesacon_shadowfb */
/*
__vesacon_background = calloc(mi->h_res*mi->v_res, 4);
__vesacon_shadowfb = calloc(mi->h_res*mi->v_res, 4);
*/
/* FIXME: the allocation takes the possible padding into account
* whereas BIOS code simply allocates hres * vres bytes.
* Which is correct?
*/
/*
* For performance reasons, or due to hardware restrictions, scan lines
* may be padded to an amount of memory alignment. These padding pixel elements
* are outside the area covered by HorizontalResolution and are not visible.
* For direct frame buffer access, this number is used as a span between starts
* of pixel lines in video memory. Based on the size of an individual pixel element
* and PixelsPerScanline, the offset in video memory from pixel element (x, y)
* to pixel element (x, y+1) has to be calculated as
* "sizeof( PixelElement ) * PixelsPerScanLine", and not
* "sizeof( PixelElement ) * HorizontalResolution", though in many cases
* those values can coincide.
*/
exit:
if (vi)
free(vi);
return err;
}
static void efi_vesacon_screencpy(size_t dst, const uint32_t *s,
size_t bytes, struct win_info *wi)
{
size_t win_off;
char *win_base = wi->win_base;
/* For EFI, we simply take the offset from the framebuffer and write to it
* FIXME: any gotchas?
*/
win_off = dst;
memcpy(win_base + win_off, s, bytes);
}
static int efi_vesacon_font_query(uint8_t **font)
{
/* set up font info
* For now, font info is stored as raw data and used
* as such. Altenatively, the font data stored in a file
* could be read and parsed. (note: for this, EFI
* file support should be exposed via firmware structure)
*/
*font = (uint8_t *)cp865_8x16_font_data;
return cp865_8x16_font_height;
}
__export int __vesacon_i915resolution(int x, int y)
{
/* We don't support this function */
return 1;
}
struct vesa_ops efi_vesa_ops = {
.set_mode = efi_vesacon_set_mode,
.screencpy = efi_vesacon_screencpy,
.font_query = efi_vesacon_font_query,
};