--- /dev/null
+/*
+ * 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
+grub_video_efi_init (void)
+{
+ grub_memset (&framebuffer, 0, sizeof(framebuffer));
+ return grub_video_fb_init ();
+}
+
+static grub_err_t
+grub_video_efi_fini (void)
+{
+ return grub_video_fb_fini ();
+}
+
+static grub_err_t
+grub_video_efi_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
+grub_video_efi_swap_buffers (void)
+{
+ /* TODO: Implement buffer swapping. */
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_video_efi_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_efi_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_efi_adapter =
+ {
+ .name = "EFI frame buffer driver",
+
+ .init = grub_video_efi_init,
+ .fini = grub_video_efi_fini,
+ .setup = grub_video_efi_setup,
+ .get_info = grub_video_fb_get_info,
+ .get_info_and_fini = grub_video_efi_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,
+ .swap_buffers = grub_video_efi_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_efi_set_active_render_target,
+ .get_active_render_target = grub_video_fb_get_active_render_target,
+ };
+
+GRUB_MOD_INIT(efi_fb)
+{
+ if (check_protocol ())
+ grub_video_register (&grub_video_efi_adapter);
+}
+
+GRUB_MOD_FINI(efi_fb)
+{
+ if (uga)
+ grub_video_unregister (&grub_video_efi_adapter);
+}
projects / thirdparty / grub.git / commitdiff
