diff options
Diffstat (limited to 'grub-core/video/efi_uga.c')
| -rw-r--r-- | grub-core/video/efi_uga.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/grub-core/video/efi_uga.c b/grub-core/video/efi_uga.c new file mode 100644 index 0000000..e74d6c2 --- /dev/null +++ b/grub-core/video/efi_uga.c @@ -0,0 +1,369 @@ +/* + * 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> + +GRUB_MOD_LICENSE ("GPLv3+"); + +static grub_efi_guid_t uga_draw_guid = GRUB_EFI_UGA_DRAW_GUID; +static struct grub_efi_uga_draw_protocol *uga; +static grub_uint64_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_uint64_t *fb_base, grub_uint32_t *line_len) +{ + grub_uint32_t *base = (grub_uint32_t *) (grub_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_uint64_t) (grub_addr_t) base; + *line_len = j << 2; + + return 1; + } + } + + break; + } + } + + return 0; +} + +/* Context for find_framebuf. */ +struct find_framebuf_ctx +{ + grub_uint64_t *fb_base; + grub_uint32_t *line_len; + int found; +}; + +/* Helper for find_framebuf. */ +static int +find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data) +{ + struct find_framebuf_ctx *ctx = data; + grub_pci_address_t addr, rcaddr; + grub_uint32_t subclass; + + addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS); + subclass = (grub_pci_read (addr) >> 16) & 0xffff; + + if (subclass != GRUB_PCI_CLASS_SUBCLASS_VGA) + return 0; + + /* Enable MEM address spaces */ + rcaddr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND); + grub_pci_write_word (rcaddr, grub_pci_read_word (rcaddr) | GRUB_PCI_COMMAND_MEM_ENABLED); + + { + int i; + + grub_dprintf ("video", "Display controller: %d:%d.%d\nDevice id: %x\n", + grub_pci_get_bus (dev), grub_pci_get_device (dev), + grub_pci_get_function (dev), 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; + + i++; + addr += 4; + old_bar2 = grub_pci_read (addr); + } + else + old_bar2 = 0; + + base64 = old_bar2; + base64 <<= 32; + base64 |= (old_bar1 & GRUB_PCI_ADDR_MEM_MASK); + + grub_dprintf ("video", "%s(%d): 0x%" PRIxGRUB_UINT64_T "\n", + ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) ? + "VMEM" : "MMIO"), type == GRUB_PCI_ADDR_MEM_TYPE_64 ? i - 1 : i, + base64); + +#if GRUB_CPU_SIZEOF_VOID_P == 4 + if (old_bar2) + continue; +#endif + + if ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) && (! ctx->found)) + { + *ctx->fb_base = base64; + if (find_line_len (ctx->fb_base, ctx->line_len)) + ctx->found++; + } + } + } + + return ctx->found; +} + +static int +find_framebuf (grub_uint64_t *fb_base, grub_uint32_t *line_len) +{ + struct find_framebuf_ctx ctx = { + .fb_base = fb_base, + .line_len = line_len, + .found = 0 + }; + + grub_pci_iterate (find_card, &ctx); + return ctx.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 +grub_video_uga_init (void) +{ + grub_memset (&framebuffer, 0, sizeof(framebuffer)); + return grub_video_fb_init (); +} + +static grub_err_t +grub_video_uga_fini (void) +{ + return grub_video_fb_fini (); +} + +static grub_err_t +grub_video_uga_setup (unsigned int width, unsigned int height, + unsigned int mode_type, + unsigned int mode_mask __attribute__ ((unused))) +{ + 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_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; + 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 +grub_video_uga_swap_buffers (void) +{ + /* TODO: Implement buffer swapping. */ + return GRUB_ERR_NONE; +} + +static grub_err_t +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 +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; +} + +static struct grub_video_adapter grub_video_uga_adapter = + { + .name = "EFI UGA driver", + .id = GRUB_VIDEO_DRIVER_EFI_UGA, + + .prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE_DIRTY, + + .init = grub_video_uga_init, + .fini = grub_video_uga_fini, + .setup = grub_video_uga_setup, + .get_info = grub_video_fb_get_info, + .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, + .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_uga_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_uga_set_active_render_target, + .get_active_render_target = grub_video_fb_get_active_render_target, + }; + +GRUB_MOD_INIT(efi_uga) +{ + if (check_protocol ()) + grub_video_register (&grub_video_uga_adapter); +} + +GRUB_MOD_FINI(efi_uga) +{ + if (uga) + grub_video_unregister (&grub_video_uga_adapter); +} |