2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#define grub_video_render_target grub_video_fbrender_target
2N/A
2N/A#include <grub/err.h>
2N/A#include <grub/types.h>
2N/A#include <grub/dl.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/video.h>
2N/A#include <grub/video_fb.h>
2N/A#include <grub/efi/api.h>
2N/A#include <grub/efi/efi.h>
2N/A#include <grub/efi/graphics_output.h>
2N/A
2N/AGRUB_MOD_LICENSE ("GPLv3+");
2N/A
2N/Astatic grub_efi_guid_t graphics_output_guid = GRUB_EFI_GOP_GUID;
2N/Astatic struct grub_efi_gop *gop;
2N/Astatic unsigned old_mode;
2N/Astatic int restore_needed;
2N/A
2N/Astatic struct
2N/A{
2N/A struct grub_video_mode_info mode_info;
2N/A struct grub_video_render_target *render_target;
2N/A grub_uint8_t *ptr;
2N/A} framebuffer;
2N/A
2N/A
2N/Astatic int
2N/Acheck_protocol (void)
2N/A{
2N/A gop = grub_efi_locate_protocol (&graphics_output_guid, 0);
2N/A if (gop)
2N/A return 1;
2N/A
2N/A return 0;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_init (void)
2N/A{
2N/A grub_memset (&framebuffer, 0, sizeof(framebuffer));
2N/A return grub_video_fb_init ();
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_fini (void)
2N/A{
2N/A if (restore_needed)
2N/A {
2N/A efi_call_2 (gop->set_mode, gop, old_mode);
2N/A restore_needed = 0;
2N/A }
2N/A return grub_video_fb_fini ();
2N/A}
2N/A
2N/Astatic int
2N/Agrub_video_gop_get_bpp (struct grub_efi_gop_mode_info *in)
2N/A{
2N/A grub_uint32_t total_mask;
2N/A int i;
2N/A switch (in->pixel_format)
2N/A {
2N/A case GRUB_EFI_GOT_BGRA8:
2N/A case GRUB_EFI_GOT_RGBA8:
2N/A return 32;
2N/A
2N/A case GRUB_EFI_GOT_BITMASK:
2N/A /* Check overlaps. */
2N/A if ((in->pixel_bitmask.r & in->pixel_bitmask.g)
2N/A || (in->pixel_bitmask.r & in->pixel_bitmask.b)
2N/A || (in->pixel_bitmask.g & in->pixel_bitmask.b)
2N/A || (in->pixel_bitmask.r & in->pixel_bitmask.a)
2N/A || (in->pixel_bitmask.g & in->pixel_bitmask.a)
2N/A || (in->pixel_bitmask.b & in->pixel_bitmask.a))
2N/A return 0;
2N/A
2N/A total_mask = in->pixel_bitmask.r | in->pixel_bitmask.g
2N/A | in->pixel_bitmask.b | in->pixel_bitmask.a;
2N/A
2N/A for (i = 31; i >= 0; i--)
2N/A if (total_mask & (1 << i))
2N/A return i + 1;
2N/A
2N/A /* Fall through. */
2N/A default:
2N/A return 0;
2N/A }
2N/A}
2N/A
2N/Astatic void
2N/Agrub_video_gop_get_bitmask (grub_uint32_t mask, unsigned int *mask_size,
2N/A unsigned int *field_pos)
2N/A{
2N/A int i;
2N/A int last_p;
2N/A for (i = 31; i >= 0; i--)
2N/A if (mask & (1 << i))
2N/A break;
2N/A if (i == -1)
2N/A {
2N/A *mask_size = *field_pos = 0;
2N/A return;
2N/A }
2N/A last_p = i;
2N/A for (; i >= 0; i--)
2N/A if (!(mask & (1 << i)))
2N/A break;
2N/A *field_pos = i + 1;
2N/A *mask_size = last_p - *field_pos + 1;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_fill_mode_info (unsigned mode,
2N/A struct grub_efi_gop_mode_info *in,
2N/A struct grub_video_mode_info *out)
2N/A{
2N/A out->mode_number = mode;
2N/A out->number_of_colors = 256;
2N/A out->width = in->width;
2N/A out->height = in->height;
2N/A out->mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
2N/A out->bpp = grub_video_gop_get_bpp (in);
2N/A out->bytes_per_pixel = out->bpp >> 3;
2N/A if (!out->bpp)
2N/A return grub_error (GRUB_ERR_IO, "unsupported video mode");
2N/A out->pitch = in->pixels_per_scanline * out->bytes_per_pixel;
2N/A
2N/A switch (in->pixel_format)
2N/A {
2N/A case GRUB_EFI_GOT_RGBA8:
2N/A out->red_mask_size = 8;
2N/A out->red_field_pos = 0;
2N/A out->green_mask_size = 8;
2N/A out->green_field_pos = 8;
2N/A out->blue_mask_size = 8;
2N/A out->blue_field_pos = 16;
2N/A out->reserved_mask_size = 8;
2N/A out->reserved_field_pos = 24;
2N/A break;
2N/A
2N/A case GRUB_EFI_GOT_BGRA8:
2N/A out->red_mask_size = 8;
2N/A out->red_field_pos = 16;
2N/A out->green_mask_size = 8;
2N/A out->green_field_pos = 8;
2N/A out->blue_mask_size = 8;
2N/A out->blue_field_pos = 0;
2N/A out->reserved_mask_size = 8;
2N/A out->reserved_field_pos = 24;
2N/A break;
2N/A
2N/A case GRUB_EFI_GOT_BITMASK:
2N/A grub_video_gop_get_bitmask (in->pixel_bitmask.r, &out->red_mask_size,
2N/A &out->red_field_pos);
2N/A grub_video_gop_get_bitmask (in->pixel_bitmask.g, &out->green_mask_size,
2N/A &out->green_field_pos);
2N/A grub_video_gop_get_bitmask (in->pixel_bitmask.b, &out->blue_mask_size,
2N/A &out->blue_field_pos);
2N/A grub_video_gop_get_bitmask (in->pixel_bitmask.a, &out->reserved_mask_size,
2N/A &out->reserved_field_pos);
2N/A break;
2N/A
2N/A default:
2N/A return grub_error (GRUB_ERR_IO, "unsupported video mode");
2N/A }
2N/A
2N/A out->blit_format = grub_video_get_blit_format (out);
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic int
2N/Agrub_video_gop_iterate (int (*hook) (const struct grub_video_mode_info *info))
2N/A{
2N/A unsigned mode;
2N/A
2N/A for (mode = 0; mode < gop->mode->max_mode; mode++)
2N/A {
2N/A grub_efi_uintn_t size;
2N/A grub_efi_status_t status;
2N/A struct grub_efi_gop_mode_info *info = NULL;
2N/A grub_err_t err;
2N/A struct grub_video_mode_info mode_info;
2N/A
2N/A status = efi_call_4 (gop->query_mode, gop, mode, &size, &info);
2N/A
2N/A if (status)
2N/A {
2N/A info = 0;
2N/A continue;
2N/A }
2N/A
2N/A err = grub_video_gop_fill_mode_info (mode, info, &mode_info);
2N/A if (err)
2N/A {
2N/A grub_errno = GRUB_ERR_NONE;
2N/A continue;
2N/A }
2N/A if (hook (&mode_info))
2N/A return 1;
2N/A }
2N/A return 0;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_setup (unsigned int width, unsigned int height,
2N/A unsigned int mode_type,
2N/A unsigned int mode_mask __attribute__ ((unused)))
2N/A{
2N/A unsigned int depth;
2N/A struct grub_efi_gop_mode_info *info = NULL;
2N/A unsigned best_mode = 0;
2N/A grub_err_t err;
2N/A unsigned bpp;
2N/A int found = 0;
2N/A unsigned long long best_volume = 0;
2N/A
2N/A depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
2N/A >> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
2N/A
2N/A /* Keep current mode if possible. */
2N/A if (gop->mode->info)
2N/A {
2N/A bpp = grub_video_gop_get_bpp (gop->mode->info);
2N/A if (bpp && ((width == gop->mode->info->width
2N/A && height == gop->mode->info->height)
2N/A || (width == 0 && height == 0))
2N/A && (depth == bpp || depth == 0))
2N/A {
2N/A grub_dprintf ("video", "GOP: keeping mode %d\n", gop->mode->mode);
2N/A best_mode = gop->mode->mode;
2N/A found = 1;
2N/A }
2N/A }
2N/A
2N/A if (!found)
2N/A {
2N/A unsigned mode;
2N/A grub_dprintf ("video", "GOP: %d modes detected\n", gop->mode->max_mode);
2N/A for (mode = 0; mode < gop->mode->max_mode; mode++)
2N/A {
2N/A grub_efi_uintn_t size;
2N/A grub_efi_status_t status;
2N/A
2N/A status = efi_call_4 (gop->query_mode, gop, mode, &size, &info);
2N/A if (status)
2N/A {
2N/A info = 0;
2N/A continue;
2N/A }
2N/A
2N/A grub_dprintf ("video", "GOP: mode %d: %dx%d\n", mode, info->width,
2N/A info->height);
2N/A
2N/A bpp = grub_video_gop_get_bpp (info);
2N/A if (!bpp)
2N/A {
2N/A grub_dprintf ("video", "GOP: mode %d: incompatible pixel mode\n",
2N/A mode);
2N/A continue;
2N/A }
2N/A
2N/A grub_dprintf ("video", "GOP: mode %d: depth %d\n", mode, bpp);
2N/A
2N/A if (!(((info->width == width && info->height == height)
2N/A || (width == 0 && height == 0))
2N/A && (bpp == depth || depth == 0)))
2N/A {
2N/A grub_dprintf ("video", "GOP: mode %d: rejected\n", mode);
2N/A continue;
2N/A }
2N/A
2N/A if (best_volume < ((unsigned long long) info->width)
2N/A * ((unsigned long long) info->height)
2N/A * ((unsigned long long) bpp))
2N/A {
2N/A best_volume = ((unsigned long long) info->width)
2N/A * ((unsigned long long) info->height)
2N/A * ((unsigned long long) bpp);
2N/A best_mode = mode;
2N/A }
2N/A found = 1;
2N/A }
2N/A }
2N/A
2N/A if (!found)
2N/A {
2N/A grub_dprintf ("video", "GOP: no mode found\n");
2N/A return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found");
2N/A }
2N/A
2N/A if (best_mode != gop->mode->mode)
2N/A {
2N/A if (!restore_needed)
2N/A {
2N/A old_mode = gop->mode->mode;
2N/A restore_needed = 1;
2N/A }
2N/A efi_call_2 (gop->set_mode, gop, best_mode);
2N/A }
2N/A
2N/A info = gop->mode->info;
2N/A
2N/A err = grub_video_gop_fill_mode_info (gop->mode->mode, info,
2N/A &framebuffer.mode_info);
2N/A if (err)
2N/A {
2N/A grub_dprintf ("video", "GOP: couldn't fill mode info\n");
2N/A return err;
2N/A }
2N/A
2N/A framebuffer.ptr = (void *) (grub_addr_t) gop->mode->fb_base;
2N/A
2N/A grub_dprintf ("video", "GOP: initialising FB @ %p %dx%dx%d\n",
2N/A framebuffer.ptr, framebuffer.mode_info.width,
2N/A framebuffer.mode_info.height, framebuffer.mode_info.bpp);
2N/A
2N/A err = grub_video_fb_create_render_target_from_pointer
2N/A (&framebuffer.render_target, &framebuffer.mode_info, framebuffer.ptr);
2N/A
2N/A if (err)
2N/A {
2N/A grub_dprintf ("video", "GOP: Couldn't create FB target\n");
2N/A return err;
2N/A }
2N/A
2N/A err = grub_video_fb_set_active_render_target (framebuffer.render_target);
2N/A
2N/A if (err)
2N/A {
2N/A grub_dprintf ("video", "GOP: Couldn't set FB target\n");
2N/A return err;
2N/A }
2N/A
2N/A err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
2N/A grub_video_fbstd_colors);
2N/A
2N/A if (err)
2N/A grub_dprintf ("video", "GOP: Couldn't set palette\n");
2N/A else
2N/A grub_dprintf ("video", "GOP: Success\n");
2N/A
2N/A return err;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_swap_buffers (void)
2N/A{
2N/A /* TODO: Implement buffer swapping. */
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_set_active_render_target (struct grub_video_render_target *target)
2N/A{
2N/A if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
2N/A target = framebuffer.render_target;
2N/A
2N/A return grub_video_fb_set_active_render_target (target);
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_video_gop_get_info_and_fini (struct grub_video_mode_info *mode_info,
2N/A void **framebuf)
2N/A{
2N/A grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
2N/A *framebuf = (char *) framebuffer.ptr;
2N/A
2N/A grub_video_fb_fini ();
2N/A
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic struct grub_video_adapter grub_video_gop_adapter =
2N/A {
2N/A .name = "EFI GOP driver",
2N/A .id = GRUB_VIDEO_DRIVER_EFI_GOP,
2N/A
2N/A .prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE,
2N/A
2N/A .init = grub_video_gop_init,
2N/A .fini = grub_video_gop_fini,
2N/A .setup = grub_video_gop_setup,
2N/A .get_info = grub_video_fb_get_info,
2N/A .get_info_and_fini = grub_video_gop_get_info_and_fini,
2N/A .set_palette = grub_video_fb_set_palette,
2N/A .get_palette = grub_video_fb_get_palette,
2N/A .set_viewport = grub_video_fb_set_viewport,
2N/A .get_viewport = grub_video_fb_get_viewport,
2N/A .map_color = grub_video_fb_map_color,
2N/A .map_rgb = grub_video_fb_map_rgb,
2N/A .map_rgba = grub_video_fb_map_rgba,
2N/A .unmap_color = grub_video_fb_unmap_color,
2N/A .fill_rect = grub_video_fb_fill_rect,
2N/A .blit_bitmap = grub_video_fb_blit_bitmap,
2N/A .blit_render_target = grub_video_fb_blit_render_target,
2N/A .scroll = grub_video_fb_scroll,
2N/A .swap_buffers = grub_video_gop_swap_buffers,
2N/A .create_render_target = grub_video_fb_create_render_target,
2N/A .delete_render_target = grub_video_fb_delete_render_target,
2N/A .set_active_render_target = grub_video_gop_set_active_render_target,
2N/A .get_active_render_target = grub_video_fb_get_active_render_target,
2N/A .iterate = grub_video_gop_iterate,
2N/A
2N/A .next = 0
2N/A };
2N/A
2N/AGRUB_MOD_INIT(efi_gop)
2N/A{
2N/A if (check_protocol ())
2N/A grub_video_register (&grub_video_gop_adapter);
2N/A}
2N/A
2N/AGRUB_MOD_FINI(efi_gop)
2N/A{
2N/A if (restore_needed)
2N/A {
2N/A efi_call_2 (gop->set_mode, gop, old_mode);
2N/A restore_needed = 0;
2N/A }
2N/A if (gop)
2N/A grub_video_unregister (&grub_video_gop_adapter);
2N/A}