diff options
Diffstat (limited to 'grub-core/video/coreboot/cbfb.c')
| -rw-r--r-- | grub-core/video/coreboot/cbfb.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/grub-core/video/coreboot/cbfb.c b/grub-core/video/coreboot/cbfb.c new file mode 100644 index 0000000..9af81fa --- /dev/null +++ b/grub-core/video/coreboot/cbfb.c @@ -0,0 +1,190 @@ +/* + * 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/coreboot/lbio.h> +#include <grub/machine/console.h> + +struct grub_linuxbios_table_framebuffer *grub_video_coreboot_fbtable; + +static struct +{ + struct grub_video_mode_info mode_info; + grub_uint8_t *ptr; +} framebuffer; + +static grub_err_t +grub_video_cbfb_init (void) +{ + grub_memset (&framebuffer, 0, sizeof(framebuffer)); + + return grub_video_fb_init (); +} + +static grub_err_t +grub_video_cbfb_fill_mode_info (struct grub_video_mode_info *out) +{ + grub_memset (out, 0, sizeof (*out)); + + out->width = grub_video_coreboot_fbtable->width; + out->height = grub_video_coreboot_fbtable->height; + out->pitch = grub_video_coreboot_fbtable->pitch; + + out->red_field_pos = grub_video_coreboot_fbtable->red_field_pos; + out->red_mask_size = grub_video_coreboot_fbtable->red_mask_size; + out->green_field_pos = grub_video_coreboot_fbtable->green_field_pos; + out->green_mask_size = grub_video_coreboot_fbtable->green_mask_size; + out->blue_field_pos = grub_video_coreboot_fbtable->blue_field_pos; + out->blue_mask_size = grub_video_coreboot_fbtable->blue_mask_size; + out->reserved_field_pos = grub_video_coreboot_fbtable->reserved_field_pos; + out->reserved_mask_size = grub_video_coreboot_fbtable->reserved_mask_size; + + out->mode_type = GRUB_VIDEO_MODE_TYPE_RGB; + out->bpp = grub_video_coreboot_fbtable->bpp; + out->bytes_per_pixel = (grub_video_coreboot_fbtable->bpp + 7) / 8; + out->number_of_colors = 256; + + out->blit_format = grub_video_get_blit_format (out); + return GRUB_ERR_NONE; +} + +static grub_err_t +grub_video_cbfb_setup (unsigned int width, unsigned int height, + unsigned int mode_type __attribute__ ((unused)), + unsigned int mode_mask __attribute__ ((unused))) +{ + grub_err_t err; + + if (!grub_video_coreboot_fbtable) + return grub_error (GRUB_ERR_IO, "Couldn't find display device."); + + if (!((width == grub_video_coreboot_fbtable->width && height == grub_video_coreboot_fbtable->height) + || (width == 0 && height == 0))) + return grub_error (GRUB_ERR_IO, "can't set mode %dx%d", width, height); + + err = grub_video_cbfb_fill_mode_info (&framebuffer.mode_info); + if (err) + { + grub_dprintf ("video", "CBFB: couldn't fill mode info\n"); + return err; + } + + framebuffer.ptr = (void *) (grub_addr_t) grub_video_coreboot_fbtable->lfb; + + grub_dprintf ("video", "CBFB: initialising FB @ %p %dx%dx%d\n", + framebuffer.ptr, framebuffer.mode_info.width, + framebuffer.mode_info.height, framebuffer.mode_info.bpp); + + err = grub_video_fb_setup (mode_type, mode_mask, + &framebuffer.mode_info, + framebuffer.ptr, NULL, NULL); + if (err) + return err; + + grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS, + grub_video_fbstd_colors); + + return err; +} + +static grub_err_t +grub_video_cbfb_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; +} + +static struct grub_video_adapter grub_video_cbfb_adapter = + { + .name = "Coreboot video driver", + + .prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE_DIRTY, + .id = GRUB_VIDEO_DRIVER_COREBOOT, + + .init = grub_video_cbfb_init, + .fini = grub_video_fb_fini, + .setup = grub_video_cbfb_setup, + .get_info = grub_video_fb_get_info, + .get_info_and_fini = grub_video_cbfb_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, + .set_region = grub_video_fb_set_region, + .get_region = grub_video_fb_get_region, + .set_area_status = grub_video_fb_set_area_status, + .get_area_status = grub_video_fb_get_area_status, + .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, + .swap_buffers = grub_video_fb_swap_buffers, + .create_render_target = grub_video_fb_create_render_target, + .delete_render_target = grub_video_fb_delete_render_target, + .set_active_render_target = grub_video_fb_set_active_render_target, + .get_active_render_target = grub_video_fb_get_active_render_target, + + .next = 0 + }; + +static int +iterate_linuxbios_table (grub_linuxbios_table_item_t table_item, + void *data __attribute__ ((unused))) +{ + if (table_item->tag != GRUB_LINUXBIOS_MEMBER_FRAMEBUFFER) + return 0; + grub_video_coreboot_fbtable = (struct grub_linuxbios_table_framebuffer *) (table_item + 1); + return 1; +} + +void +grub_video_coreboot_fb_early_init (void) +{ + grub_linuxbios_table_iterate (iterate_linuxbios_table, 0); +} + +void +grub_video_coreboot_fb_late_init (void) +{ + if (grub_video_coreboot_fbtable) + grub_video_register (&grub_video_cbfb_adapter); +} + +void +grub_video_coreboot_fb_fini (void) +{ + if (grub_video_coreboot_fbtable) + grub_video_unregister (&grub_video_cbfb_adapter); +} |