git.sur5r.net Git - u-boot/blob - lib/efi_loader/efi_gop.c

   1 /*
   2  *  EFI application disk support
   3  *
   4  *  Copyright (c) 2016 Alexander Graf
   5  *
   6  *  SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <efi_loader.h>
  12 #include <inttypes.h>
  13 #include <lcd.h>
  14 #include <malloc.h>
  15 #include <video.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 static const efi_guid_t efi_gop_guid = EFI_GOP_GUID;
  20
  21 struct efi_gop_obj {
  22         /* Generic EFI object parent class data */
  23         struct efi_object parent;
  24         /* EFI Interface callback struct for gop */
  25         struct efi_gop ops;
  26         /* The only mode we support */
  27         struct efi_gop_mode_info info;
  28         struct efi_gop_mode mode;
  29         /* Fields we only have acces to during init */
  30         u32 bpix;
  31         void *fb;
  32 };
  33
  34 static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
  35                                           efi_uintn_t *size_of_info,
  36                                           struct efi_gop_mode_info **info)
  37 {
  38         struct efi_gop_obj *gopobj;
  39
  40         EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
  41
  42         gopobj = container_of(this, struct efi_gop_obj, ops);
  43         *size_of_info = sizeof(gopobj->info);
  44         *info = &gopobj->info;
  45
  46         return EFI_EXIT(EFI_SUCCESS);
  47 }
  48
  49 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
  50 {
  51         EFI_ENTRY("%p, %x", this, mode_number);
  52
  53         if (mode_number != 0)
  54                 return EFI_EXIT(EFI_INVALID_PARAMETER);
  55
  56         return EFI_EXIT(EFI_SUCCESS);
  57 }
  58
  59 static __always_inline struct efi_gop_pixel efi_vid16_to_blt_col(u16 vid)
  60 {
  61         struct efi_gop_pixel blt = {
  62                 .reserved = 0,
  63         };
  64
  65         blt.blue  = (vid & 0x1f) << 3;
  66         vid >>= 5;
  67         blt.green = (vid & 0x3f) << 2;
  68         vid >>= 6;
  69         blt.red   = (vid & 0x1f) << 3;
  70         return blt;
  71 }
  72
  73 static __always_inline u16 efi_blt_col_to_vid16(struct efi_gop_pixel *blt)
  74 {
  75         return (u16)(blt->red   >> 3) << 11 |
  76                (u16)(blt->green >> 2) <<  5 |
  77                (u16)(blt->blue  >> 3);
  78 }
  79
  80 static __always_inline efi_status_t gop_blt_int(struct efi_gop *this,
  81                                                 struct efi_gop_pixel *buffer,
  82                                                 u32 operation, efi_uintn_t sx,
  83                                                 efi_uintn_t sy, efi_uintn_t dx,
  84                                                 efi_uintn_t dy,
  85                                                 efi_uintn_t width,
  86                                                 efi_uintn_t height,
  87                                                 efi_uintn_t delta)
  88 {
  89         struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
  90         efi_uintn_t i, j, linelen;
  91         u32 *fb32 = gopobj->fb;
  92         u16 *fb16 = gopobj->fb;
  93
  94         if (delta) {
  95                 /* Check for 4 byte alignment */
  96                 if (delta & 3)
  97                         return EFI_INVALID_PARAMETER;
  98                 linelen = delta >> 2;
  99         } else {
 100                 linelen = width;
 101         }
 102
 103         /* Check source rectangle */
 104         switch (operation) {
 105         case EFI_BLT_VIDEO_FILL:
 106                 break;
 107         case EFI_BLT_BUFFER_TO_VIDEO:
 108                 if (sx + width > linelen)
 109                         return EFI_INVALID_PARAMETER;
 110                 break;
 111         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 112         case EFI_BLT_VIDEO_TO_VIDEO:
 113                 if (sx + width > gopobj->info.width ||
 114                     sy + height > gopobj->info.height)
 115                         return EFI_INVALID_PARAMETER;
 116                 break;
 117         default:
 118                 return EFI_INVALID_PARAMETER;
 119         }
 120
 121         /* Check destination rectangle */
 122         switch (operation) {
 123         case EFI_BLT_VIDEO_FILL:
 124         case EFI_BLT_BUFFER_TO_VIDEO:
 125         case EFI_BLT_VIDEO_TO_VIDEO:
 126                 if (dx + width > gopobj->info.width ||
 127                     dy + height > gopobj->info.height)
 128                         return EFI_INVALID_PARAMETER;
 129                 break;
 130         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 131                 if (dx + width > linelen)
 132                         return EFI_INVALID_PARAMETER;
 133                 break;
 134         }
 135
 136         for (i = 0; i < height; i++) {
 137                 for (j = 0; j < width; j++) {
 138                         struct efi_gop_pixel pix;
 139
 140                         /* Read source pixel */
 141                         switch (operation) {
 142                         case EFI_BLT_VIDEO_FILL:
 143                                 pix = *buffer;
 144                                 break;
 145                         case EFI_BLT_BUFFER_TO_VIDEO:
 146                                 pix = buffer[linelen * (i + sy) + j + sx];
 147                                 break;
 148                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 149                         case EFI_BLT_VIDEO_TO_VIDEO:
 150                                 switch (gopobj->bpix) {
 151 #ifdef CONFIG_DM_VIDEO
 152                                 case VIDEO_BPP32:
 153 #else
 154                                 case LCD_COLOR32:
 155 #endif
 156                                         pix = *(struct efi_gop_pixel *)&fb32[
 157                                                 gopobj->info.width *
 158                                                 (i + sy) + j + sx];
 159                                 break;
 160 #ifdef CONFIG_DM_VIDEO
 161                                 case VIDEO_BPP16:
 162 #else
 163                                 case LCD_COLOR16:
 164 #endif
 165                                         pix = efi_vid16_to_blt_col(fb16[
 166                                                 gopobj->info.width *
 167                                                 (i + sy) + j + sx]);
 168                                         break;
 169                                 default:
 170                                         return EFI_UNSUPPORTED;
 171                                 }
 172                                 break;
 173                         }
 174
 175                         /* Write destination pixel */
 176                         switch (operation) {
 177                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 178                                 buffer[linelen * (i + dy) + j + dx] = pix;
 179                                 break;
 180                         case EFI_BLT_BUFFER_TO_VIDEO:
 181                         case EFI_BLT_VIDEO_FILL:
 182                         case EFI_BLT_VIDEO_TO_VIDEO:
 183                                 switch (gopobj->bpix) {
 184 #ifdef CONFIG_DM_VIDEO
 185                                 case VIDEO_BPP32:
 186 #else
 187                                 case LCD_COLOR32:
 188 #endif
 189                                         fb32[gopobj->info.width *
 190                                              (i + dy) + j + dx] = *(u32 *)&pix;
 191                                         break;
 192 #ifdef CONFIG_DM_VIDEO
 193                                 case VIDEO_BPP16:
 194 #else
 195                                 case LCD_COLOR16:
 196 #endif
 197                                         fb16[gopobj->info.width *
 198                                              (i + dy) + j + dx] =
 199                                                 efi_blt_col_to_vid16(&pix);
 200                                         break;
 201                                 default:
 202                                         return EFI_UNSUPPORTED;
 203                                 }
 204                                 break;
 205                         }
 206                 }
 207         }
 208
 209         return EFI_SUCCESS;
 210 }
 211
 212 /*
 213  * Gcc can't optimize our BLT function well, but we need to make sure that
 214  * our 2-dimensional loop gets executed very quickly, otherwise the system
 215  * will feel slow.
 216  *
 217  * By manually putting all obvious branch targets into functions which call
 218  * our generic blt function with constants, the compiler can successfully
 219  * optimize for speed.
 220  */
 221 static efi_status_t gop_blt_video_fill(struct efi_gop *this,
 222                                        struct efi_gop_pixel *buffer,
 223                                        u32 foo, efi_uintn_t sx,
 224                                        efi_uintn_t sy, efi_uintn_t dx,
 225                                        efi_uintn_t dy, efi_uintn_t width,
 226                                        efi_uintn_t height, efi_uintn_t delta)
 227 {
 228         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_FILL, sx, sy, dx,
 229                            dy, width, height, delta);
 230 }
 231
 232 static efi_status_t gop_blt_buf_to_vid(struct efi_gop *this,
 233                                        struct efi_gop_pixel *buffer,
 234                                        u32 foo, efi_uintn_t sx,
 235                                        efi_uintn_t sy, efi_uintn_t dx,
 236                                        efi_uintn_t dy, efi_uintn_t width,
 237                                        efi_uintn_t height, efi_uintn_t delta)
 238 {
 239         return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
 240                            dy, width, height, delta);
 241 }
 242
 243 static efi_status_t gop_blt_vid_to_vid(struct efi_gop *this,
 244                                        struct efi_gop_pixel *buffer,
 245                                        u32 foo, efi_uintn_t sx,
 246                                        efi_uintn_t sy, efi_uintn_t dx,
 247                                        efi_uintn_t dy, efi_uintn_t width,
 248                                        efi_uintn_t height, efi_uintn_t delta)
 249 {
 250         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_VIDEO, sx, sy, dx,
 251                            dy, width, height, delta);
 252 }
 253
 254 static efi_status_t gop_blt_vid_to_buf(struct efi_gop *this,
 255                                        struct efi_gop_pixel *buffer,
 256                                        u32 foo, efi_uintn_t sx,
 257                                        efi_uintn_t sy, efi_uintn_t dx,
 258                                        efi_uintn_t dy, efi_uintn_t width,
 259                                        efi_uintn_t height, efi_uintn_t delta)
 260 {
 261         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_BLT_BUFFER, sx, sy,
 262                            dx, dy, width, height, delta);
 263 }
 264
 265 /*
 266  * Copy rectangle.
 267  *
 268  * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
 269  * See the Unified Extensible Firmware Interface (UEFI) specification for
 270  * details.
 271  *
 272  * @this:       EFI_GRAPHICS_OUTPUT_PROTOCOL
 273  * @buffer:     pixel buffer
 274  * @sx:         source x-coordinate
 275  * @sy:         source y-coordinate
 276  * @dx:         destination x-coordinate
 277  * @dy:         destination y-coordinate
 278  * @width:      width of rectangle
 279  * @height:     height of rectangle
 280  * @delta:      length in bytes of a line in the pixel buffer (optional)
 281  * @return:     status code
 282  */
 283 efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
 284                             u32 operation, efi_uintn_t sx,
 285                             efi_uintn_t sy, efi_uintn_t dx,
 286                             efi_uintn_t dy, efi_uintn_t width,
 287                             efi_uintn_t height, efi_uintn_t delta)
 288 {
 289         efi_status_t ret = EFI_INVALID_PARAMETER;
 290
 291         EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
 292                   buffer, operation, sx, sy, dx, dy, width, height, delta);
 293
 294         /* Allow for compiler optimization */
 295         switch (operation) {
 296         case EFI_BLT_VIDEO_FILL:
 297                 ret = gop_blt_video_fill(this, buffer, operation, sx, sy, dx,
 298                                          dy, width, height, delta);
 299                 break;
 300         case EFI_BLT_BUFFER_TO_VIDEO:
 301                 ret = gop_blt_buf_to_vid(this, buffer, operation, sx, sy, dx,
 302                                          dy, width, height, delta);
 303                 break;
 304         case EFI_BLT_VIDEO_TO_VIDEO:
 305                 ret = gop_blt_vid_to_vid(this, buffer, operation, sx, sy, dx,
 306                                          dy, width, height, delta);
 307                 break;
 308         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 309                 ret = gop_blt_vid_to_buf(this, buffer, operation, sx, sy, dx,
 310                                          dy, width, height, delta);
 311                 break;
 312         default:
 313                 ret = EFI_UNSUPPORTED;
 314         }
 315
 316         if (ret != EFI_SUCCESS)
 317                 return EFI_EXIT(ret);
 318
 319 #ifdef CONFIG_DM_VIDEO
 320         video_sync_all();
 321 #else
 322         lcd_sync();
 323 #endif
 324
 325         return EFI_EXIT(EFI_SUCCESS);
 326 }
 327
 328 /*
 329  * Install graphical output protocol.
 330  *
 331  * If no supported video device exists this is not considered as an
 332  * error.
 333  */
 334 efi_status_t efi_gop_register(void)
 335 {
 336         struct efi_gop_obj *gopobj;
 337         u32 bpix, col, row;
 338         u64 fb_base, fb_size;
 339         void *fb;
 340         efi_status_t ret;
 341
 342 #ifdef CONFIG_DM_VIDEO
 343         struct udevice *vdev;
 344         struct video_priv *priv;
 345
 346         /* We only support a single video output device for now */
 347         if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
 348                 debug("WARNING: No video device\n");
 349                 return EFI_SUCCESS;
 350         }
 351
 352         priv = dev_get_uclass_priv(vdev);
 353         bpix = priv->bpix;
 354         col = video_get_xsize(vdev);
 355         row = video_get_ysize(vdev);
 356         fb_base = (uintptr_t)priv->fb;
 357         fb_size = priv->fb_size;
 358         fb = priv->fb;
 359 #else
 360         int line_len;
 361
 362         bpix = panel_info.vl_bpix;
 363         col = panel_info.vl_col;
 364         row = panel_info.vl_row;
 365         fb_base = gd->fb_base;
 366         fb_size = lcd_get_size(&line_len);
 367         fb = (void*)gd->fb_base;
 368 #endif
 369
 370         switch (bpix) {
 371 #ifdef CONFIG_DM_VIDEO
 372         case VIDEO_BPP16:
 373         case VIDEO_BPP32:
 374 #else
 375         case LCD_COLOR32:
 376         case LCD_COLOR16:
 377 #endif
 378                 break;
 379         default:
 380                 /* So far, we only work in 16 or 32 bit mode */
 381                 debug("WARNING: Unsupported video mode\n");
 382                 return EFI_SUCCESS;
 383         }
 384
 385         gopobj = calloc(1, sizeof(*gopobj));
 386         if (!gopobj) {
 387                 printf("ERROR: Out of memory\n");
 388                 return EFI_OUT_OF_RESOURCES;
 389         }
 390
 391         /* Hook up to the device list */
 392         efi_add_handle(&gopobj->parent);
 393
 394         /* Fill in object data */
 395         ret = efi_add_protocol(gopobj->parent.handle, &efi_gop_guid,
 396                                &gopobj->ops);
 397         if (ret != EFI_SUCCESS) {
 398                 printf("ERROR: Failure adding gop protocol\n");
 399                 return ret;
 400         }
 401         gopobj->ops.query_mode = gop_query_mode;
 402         gopobj->ops.set_mode = gop_set_mode;
 403         gopobj->ops.blt = gop_blt;
 404         gopobj->ops.mode = &gopobj->mode;
 405
 406         gopobj->mode.max_mode = 1;
 407         gopobj->mode.info = &gopobj->info;
 408         gopobj->mode.info_size = sizeof(gopobj->info);
 409
 410 #ifdef CONFIG_DM_VIDEO
 411         if (bpix == VIDEO_BPP32)
 412 #else
 413         if (bpix == LCD_COLOR32)
 414 #endif
 415         {
 416                 /* With 32bit color space we can directly expose the fb */
 417                 gopobj->mode.fb_base = fb_base;
 418                 gopobj->mode.fb_size = fb_size;
 419         }
 420
 421         gopobj->info.version = 0;
 422         gopobj->info.width = col;
 423         gopobj->info.height = row;
 424         gopobj->info.pixel_format = EFI_GOT_RGBA8;
 425         gopobj->info.pixels_per_scanline = col;
 426
 427         gopobj->bpix = bpix;
 428         gopobj->fb = fb;
 429
 430         return EFI_SUCCESS;
 431 }