arch/all-pc/boot/grub2-aros/grub-core/video/efi_uga.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2005,2006,2007,2008,2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #define grub_video_render_target grub_video_fbrender_target
  20
  21 #include <grub/err.h>
  22 #include <grub/types.h>
  23 #include <grub/dl.h>
  24 #include <grub/misc.h>
  25 #include <grub/mm.h>
  26 #include <grub/video.h>
  27 #include <grub/video_fb.h>
  28 #include <grub/efi/api.h>
  29 #include <grub/efi/efi.h>
  30 #include <grub/efi/uga_draw.h>
  31 #include <grub/pci.h>
  32
  33 GRUB_MOD_LICENSE ("GPLv3+");
  34
  35 static grub_efi_guid_t uga_draw_guid = GRUB_EFI_UGA_DRAW_GUID;
  36 static struct grub_efi_uga_draw_protocol *uga;
  37 static grub_uint32_t uga_fb;
  38 static grub_uint32_t uga_pitch;
  39
  40 static struct
  41 {
  42   struct grub_video_mode_info mode_info;
  43   struct grub_video_render_target *render_target;
  44   grub_uint8_t *ptr;
  45 } framebuffer;
  46
  47 #define RGB_MASK        0xffffff
  48 #define RGB_MAGIC       0x121314
  49 #define LINE_MIN        800
  50 #define LINE_MAX        4096
  51 #define FBTEST_STEP     (0x10000 >> 2)
  52 #define FBTEST_COUNT    8
  53
  54 static int
  55 find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
  56 {
  57   grub_uint32_t *base = (grub_uint32_t *) (grub_addr_t) *fb_base;
  58   int i;
  59
  60   for (i = 0; i < FBTEST_COUNT; i++, base += FBTEST_STEP)
  61     {
  62       if ((*base & RGB_MASK) == RGB_MAGIC)
  63         {
  64           int j;
  65
  66           for (j = LINE_MIN; j <= LINE_MAX; j++)
  67             {
  68               if ((base[j] & RGB_MASK) == RGB_MAGIC)
  69                 {
  70                   *fb_base = (grub_uint32_t) (grub_addr_t) base;
  71                   *line_len = j << 2;
  72
  73                   return 1;
  74                 }
  75             }
  76
  77           break;
  78         }
  79     }
  80
  81   return 0;
  82 }
  83
  84 /* Context for find_framebuf.  */
  85 struct find_framebuf_ctx
  86 {
  87   grub_uint32_t *fb_base;
  88   grub_uint32_t *line_len;
  89   int found;
  90 };
  91
  92 /* Helper for find_framebuf.  */
  93 static int
  94 find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
  95 {
  96   struct find_framebuf_ctx *ctx = data;
  97   grub_pci_address_t addr;
  98
  99   addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
 100   if (grub_pci_read (addr) >> 24 == 0x3)
 101     {
 102       int i;
 103
 104       grub_dprintf ("fb", "Display controller: %d:%d.%d\nDevice id: %x\n",
 105                     grub_pci_get_bus (dev), grub_pci_get_device (dev),
 106                     grub_pci_get_function (dev), pciid);
 107       addr += 8;
 108       for (i = 0; i < 6; i++, addr += 4)
 109         {
 110           grub_uint32_t old_bar1, old_bar2, type;
 111           grub_uint64_t base64;
 112
 113           old_bar1 = grub_pci_read (addr);
 114           if ((! old_bar1) || (old_bar1 & GRUB_PCI_ADDR_SPACE_IO))
 115             continue;
 116
 117           type = old_bar1 & GRUB_PCI_ADDR_MEM_TYPE_MASK;
 118           if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
 119             {
 120               if (i == 5)
 121                 break;
 122
 123               old_bar2 = grub_pci_read (addr + 4);
 124             }
 125           else
 126             old_bar2 = 0;
 127
 128           base64 = old_bar2;
 129           base64 <<= 32;
 130           base64 |= (old_bar1 & GRUB_PCI_ADDR_MEM_MASK);
 131
 132           grub_dprintf ("fb", "%s(%d): 0x%llx\n",
 133                         ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) ?
 134                         "VMEM" : "MMIO"), i,
 135                        (unsigned long long) base64);
 136
 137           if ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) && (! ctx->found))
 138             {
 139               *ctx->fb_base = base64;
 140               if (find_line_len (ctx->fb_base, ctx->line_len))
 141                 ctx->found++;
 142             }
 143
 144           if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
 145             {
 146               i++;
 147               addr += 4;
 148             }
 149         }
 150     }
 151
 152   return ctx->found;
 153 }
 154
 155 static int
 156 find_framebuf (grub_uint32_t *fb_base, grub_uint32_t *line_len)
 157 {
 158   struct find_framebuf_ctx ctx = {
 159     .fb_base = fb_base,
 160     .line_len = line_len,
 161     .found = 0
 162   };
 163
 164   grub_pci_iterate (find_card, &ctx);
 165   return ctx.found;
 166 }
 167
 168 static int
 169 check_protocol (void)
 170 {
 171   grub_efi_uga_draw_protocol_t *c;
 172
 173   c = grub_efi_locate_protocol (&uga_draw_guid, 0);
 174   if (c)
 175     {
 176       grub_uint32_t width, height, depth, rate, pixel;
 177       int ret;
 178
 179       if (efi_call_5 (c->get_mode, c, &width, &height, &depth, &rate))
 180         return 0;
 181
 182       grub_efi_set_text_mode (0);
 183       pixel = RGB_MAGIC;
 184       efi_call_10 (c->blt, c, (struct grub_efi_uga_pixel *) &pixel,
 185                    GRUB_EFI_UGA_VIDEO_FILL, 0, 0, 0, 0, 1, height, 0);
 186       ret = find_framebuf (&uga_fb, &uga_pitch);
 187       grub_efi_set_text_mode (1);
 188
 189       if (ret)
 190         {
 191           uga = c;
 192           return 1;
 193         }
 194     }
 195
 196   return 0;
 197 }
 198
 199 static grub_err_t
 200 grub_video_uga_init (void)
 201 {
 202   grub_memset (&framebuffer, 0, sizeof(framebuffer));
 203   return grub_video_fb_init ();
 204 }
 205
 206 static grub_err_t
 207 grub_video_uga_fini (void)
 208 {
 209   return grub_video_fb_fini ();
 210 }
 211
 212 static grub_err_t
 213 grub_video_uga_setup (unsigned int width, unsigned int height,
 214                       unsigned int mode_type,
 215                       unsigned int mode_mask __attribute__ ((unused)))
 216 {
 217   unsigned int depth;
 218   int found = 0;
 219
 220   depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
 221     >> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
 222
 223   {
 224     grub_uint32_t w;
 225     grub_uint32_t h;
 226     grub_uint32_t d;
 227     grub_uint32_t r;
 228
 229     if ((! efi_call_5 (uga->get_mode, uga, &w, &h, &d, &r)) &&
 230         ((! width) || (width == w)) &&
 231         ((! height) || (height == h)) &&
 232         ((! depth) || (depth == d)))
 233       {
 234         framebuffer.mode_info.width = w;
 235         framebuffer.mode_info.height = h;
 236         framebuffer.mode_info.pitch = uga_pitch;
 237         framebuffer.ptr = (grub_uint8_t *) (grub_addr_t) uga_fb;
 238
 239         found = 1;
 240       }
 241   }
 242
 243   if (found)
 244     {
 245       grub_err_t err;
 246
 247       framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
 248       framebuffer.mode_info.bpp = 32;
 249       framebuffer.mode_info.bytes_per_pixel = 4;
 250       framebuffer.mode_info.number_of_colors = 256;
 251       framebuffer.mode_info.red_mask_size = 8;
 252       framebuffer.mode_info.red_field_pos = 16;
 253       framebuffer.mode_info.green_mask_size = 8;
 254       framebuffer.mode_info.green_field_pos = 8;
 255       framebuffer.mode_info.blue_mask_size = 8;
 256       framebuffer.mode_info.blue_field_pos = 0;
 257       framebuffer.mode_info.reserved_mask_size = 8;
 258       framebuffer.mode_info.reserved_field_pos = 24;
 259
 260       framebuffer.mode_info.blit_format =
 261         grub_video_get_blit_format (&framebuffer.mode_info);
 262
 263       err = grub_video_fb_create_render_target_from_pointer
 264         (&framebuffer.render_target,
 265          &framebuffer.mode_info,
 266          framebuffer.ptr);
 267
 268       if (err)
 269         return err;
 270
 271       err = grub_video_fb_set_active_render_target
 272         (framebuffer.render_target);
 273
 274       if (err)
 275         return err;
 276
 277       err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
 278                                        grub_video_fbstd_colors);
 279
 280       return err;
 281     }
 282
 283   return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found");
 284 }
 285
 286 static grub_err_t
 287 grub_video_uga_swap_buffers (void)
 288 {
 289   /* TODO: Implement buffer swapping.  */
 290   return GRUB_ERR_NONE;
 291 }
 292
 293 static grub_err_t
 294 grub_video_uga_set_active_render_target (struct grub_video_render_target *target)
 295 {
 296   if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
 297     target = framebuffer.render_target;
 298
 299   return grub_video_fb_set_active_render_target (target);
 300 }
 301
 302 static grub_err_t
 303 grub_video_uga_get_info_and_fini (struct grub_video_mode_info *mode_info,
 304                                   void **framebuf)
 305 {
 306   grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
 307   *framebuf = (char *) framebuffer.ptr;
 308
 309   grub_video_fb_fini ();
 310
 311   return GRUB_ERR_NONE;
 312 }
 313
 314 static struct grub_video_adapter grub_video_uga_adapter =
 315   {
 316     .name = "EFI UGA driver",
 317     .id = GRUB_VIDEO_DRIVER_EFI_UGA,
 318
 319     .prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE_DIRTY,
 320
 321     .init = grub_video_uga_init,
 322     .fini = grub_video_uga_fini,
 323     .setup = grub_video_uga_setup,
 324     .get_info = grub_video_fb_get_info,
 325     .get_info_and_fini = grub_video_uga_get_info_and_fini,
 326     .set_palette = grub_video_fb_set_palette,
 327     .get_palette = grub_video_fb_get_palette,
 328     .set_viewport = grub_video_fb_set_viewport,
 329     .get_viewport = grub_video_fb_get_viewport,
 330     .set_region = grub_video_fb_set_region,
 331     .get_region = grub_video_fb_get_region,
 332     .set_area_status = grub_video_fb_set_area_status,
 333     .get_area_status = grub_video_fb_get_area_status,
 334     .map_color = grub_video_fb_map_color,
 335     .map_rgb = grub_video_fb_map_rgb,
 336     .map_rgba = grub_video_fb_map_rgba,
 337     .unmap_color = grub_video_fb_unmap_color,
 338     .fill_rect = grub_video_fb_fill_rect,
 339     .blit_bitmap = grub_video_fb_blit_bitmap,
 340     .blit_render_target = grub_video_fb_blit_render_target,
 341     .scroll = grub_video_fb_scroll,
 342     .swap_buffers = grub_video_uga_swap_buffers,
 343     .create_render_target = grub_video_fb_create_render_target,
 344     .delete_render_target = grub_video_fb_delete_render_target,
 345     .set_active_render_target = grub_video_uga_set_active_render_target,
 346     .get_active_render_target = grub_video_fb_get_active_render_target,
 347   };
 348
 349 GRUB_MOD_INIT(efi_uga)
 350 {
 351   if (check_protocol ())
 352     grub_video_register (&grub_video_uga_adapter);
 353 }
 354
 355 GRUB_MOD_FINI(efi_uga)
 356 {
 357   if (uga)
 358     grub_video_unregister (&grub_video_uga_adapter);
 359 }