grub/video/efi_uga.c

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#define grub_video_render_target grub_video_fbrender_target
#include <grub/err.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
#include <grub/video_fb.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#include <grub/efi/uga_draw.h>
#include <grub/pci.h>
static grub_efi_guid_t uga_draw_guid = GRUB_EFI_UGA_DRAW_GUID;
static struct grub_efi_uga_draw_protocol *uga;
static grub_uint32_t uga_fb;
static grub_uint32_t uga_pitch;
static struct
{
struct grub_video_mode_info mode_info;
struct grub_video_render_target *render_target;
grub_uint8_t *ptr;
} framebuffer;
#define RGB_MASK 0xffffff
#define RGB_MAGIC 0x121314
#define LINE_MIN 800
#define LINE_MAX 4096
#define FBTEST_STEP (0x10000 >> 2)
#define FBTEST_COUNT 8
static int
find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
{
grub_uint32_t *base = (grub_uint32_t *) (grub_target_addr_t) *fb_base;
int i;
for (i = 0; i < FBTEST_COUNT; i++, base += FBTEST_STEP)
{
if ((*base & RGB_MASK) == RGB_MAGIC)
{
int j;
for (j = LINE_MIN; j <= LINE_MAX; j++)
{
if ((base[j] & RGB_MASK) == RGB_MAGIC)
{
*fb_base = (grub_uint32_t) (grub_target_addr_t) base;
*line_len = j << 2;
return 1;
}
}
break;
}
}
return 0;
}
static int
find_framebuf (grub_uint32_t *fb_base, grub_uint32_t *line_len)
{
int found = 0;
auto int NESTED_FUNC_ATTR find_card (int bus, int dev, int func,
grub_pci_id_t pciid);
int NESTED_FUNC_ATTR find_card (int bus, int dev, int func,
grub_pci_id_t pciid)
{
grub_pci_address_t addr;
addr = grub_pci_make_address (bus, dev, func, 2);
if (grub_pci_read (addr) >> 24 == 0x3)
{
int i;
grub_dprintf ("fb", "Display controller: %d:%d.%d\nDevice id: %x\n",
bus, dev, func, pciid);
addr += 8;
for (i = 0; i < 6; i++, addr += 4)
{
grub_uint32_t old_bar1, old_bar2, type;
grub_uint64_t base64;
old_bar1 = grub_pci_read (addr);
if ((! old_bar1) || (old_bar1 & GRUB_PCI_ADDR_SPACE_IO))
continue;
type = old_bar1 & GRUB_PCI_ADDR_MEM_TYPE_MASK;
if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
{
if (i == 5)
break;
old_bar2 = grub_pci_read (addr + 4);
}
else
old_bar2 = 0;
base64 = old_bar2;
base64 <<= 32;
base64 |= (old_bar1 & GRUB_PCI_ADDR_MEM_MASK);
grub_dprintf ("fb", "%s(%d): 0x%llx\n",
((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) ?
"VMEM" : "MMIO"), i,
(unsigned long long) base64);
if ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) && (! found))
{
*fb_base = base64;
if (find_line_len (fb_base, line_len))
found++;
}
if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
{
i++;
addr += 4;
}
}
}
return found;
}
grub_pci_iterate (find_card);
return found;
}
static int
check_protocol (void)
{
grub_efi_uga_draw_protocol_t *c;
c = grub_efi_locate_protocol (&uga_draw_guid, 0);
if (c)
{
grub_uint32_t width, height, depth, rate, pixel;
int ret;
if (efi_call_5 (c->get_mode, c, &width, &height, &depth, &rate))
return 0;
grub_efi_set_text_mode (0);
pixel = RGB_MAGIC;
efi_call_10 (c->blt, c, (struct grub_efi_uga_pixel *) &pixel,
GRUB_EFI_UGA_VIDEO_FILL, 0, 0, 0, 0, 1, height, 0);
ret = find_framebuf (&uga_fb, &uga_pitch);
grub_efi_set_text_mode (1);
if (ret)
{
uga = c;
return 1;
}
}
return 0;
}
static grub_err_t
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grub_video_uga_init (void)
{
grub_memset (&framebuffer, 0, sizeof(framebuffer));
return grub_video_fb_init ();
}
static grub_err_t
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grub_video_uga_fini (void)
{
return grub_video_fb_fini ();
}
static grub_err_t
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grub_video_uga_setup (unsigned int width, unsigned int height,
unsigned int mode_type)
{
unsigned int depth;
int found = 0;
depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
{
grub_uint32_t w;
grub_uint32_t h;
grub_uint32_t d;
grub_uint32_t r;
if ((! efi_call_5 (uga->get_mode, uga, &w, &h, &d, &r)) &&
((! width) || (width == w)) &&
((! height) || (height == h)) &&
((! depth) || (depth == d)))
{
framebuffer.mode_info.width = w;
framebuffer.mode_info.height = h;
framebuffer.mode_info.pitch = uga_pitch;
framebuffer.ptr = (grub_uint8_t *) (grub_target_addr_t) uga_fb;
found = 1;
}
}
if (found)
{
grub_err_t err;
framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
framebuffer.mode_info.bpp = 32;
framebuffer.mode_info.bytes_per_pixel = 4;
framebuffer.mode_info.number_of_colors = 256; /* TODO: fix me. */
framebuffer.mode_info.red_mask_size = 8;
framebuffer.mode_info.red_field_pos = 16;
framebuffer.mode_info.green_mask_size = 8;
framebuffer.mode_info.green_field_pos = 8;
framebuffer.mode_info.blue_mask_size = 8;
framebuffer.mode_info.blue_field_pos = 0;
framebuffer.mode_info.reserved_mask_size = 8;
framebuffer.mode_info.reserved_field_pos = 24;
framebuffer.mode_info.blit_format =
grub_video_get_blit_format (&framebuffer.mode_info);
err = grub_video_fb_create_render_target_from_pointer
(&framebuffer.render_target,
&framebuffer.mode_info,
framebuffer.ptr);
if (err)
return err;
err = grub_video_fb_set_active_render_target
(framebuffer.render_target);
if (err)
return err;
err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
grub_video_fbstd_colors);
return err;
}
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found.");
}
static grub_err_t
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grub_video_uga_swap_buffers (void)
{
/* TODO: Implement buffer swapping. */
return GRUB_ERR_NONE;
}
static grub_err_t
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grub_video_uga_set_active_render_target (struct grub_video_render_target *target)
{
if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
target = framebuffer.render_target;
return grub_video_fb_set_active_render_target (target);
}
static grub_err_t
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grub_video_uga_get_info_and_fini (struct grub_video_mode_info *mode_info,
void **framebuf)
{
grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
*framebuf = (char *) framebuffer.ptr;
grub_video_fb_fini ();
return GRUB_ERR_NONE;
}
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static struct grub_video_adapter grub_video_uga_adapter =
{
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.name = "EFI UGA driver",
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.init = grub_video_uga_init,
.fini = grub_video_uga_fini,
.setup = grub_video_uga_setup,
.get_info = grub_video_fb_get_info,
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.get_info_and_fini = grub_video_uga_get_info_and_fini,
.set_palette = grub_video_fb_set_palette,
.get_palette = grub_video_fb_get_palette,
.set_viewport = grub_video_fb_set_viewport,
.get_viewport = grub_video_fb_get_viewport,
.map_color = grub_video_fb_map_color,
.map_rgb = grub_video_fb_map_rgb,
.map_rgba = grub_video_fb_map_rgba,
.unmap_color = grub_video_fb_unmap_color,
.fill_rect = grub_video_fb_fill_rect,
.blit_bitmap = grub_video_fb_blit_bitmap,
.blit_render_target = grub_video_fb_blit_render_target,
.scroll = grub_video_fb_scroll,
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.swap_buffers = grub_video_uga_swap_buffers,
.create_render_target = grub_video_fb_create_render_target,
.delete_render_target = grub_video_fb_delete_render_target,
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.set_active_render_target = grub_video_uga_set_active_render_target,
.get_active_render_target = grub_video_fb_get_active_render_target,
};
GRUB_MOD_INIT(efi_fb)
{
if (check_protocol ())
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grub_video_register (&grub_video_uga_adapter);
}
GRUB_MOD_FINI(efi_fb)
{
if (uga)
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grub_video_unregister (&grub_video_uga_adapter);
}