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 /*
  81  * Copy rectangle.
  82  *
  83  * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
  84  * See the Unified Extensible Firmware Interface (UEFI) specification for
  85  * details.
  86  *
  87  * @this:       EFI_GRAPHICS_OUTPUT_PROTOCOL
  88  * @buffer:     pixel buffer
  89  * @sx:         source x-coordinate
  90  * @sy:         source y-coordinate
  91  * @dx:         destination x-coordinate
  92  * @dy:         destination y-coordinate
  93  * @width:      width of rectangle
  94  * @height:     height of rectangle
  95  * @delta:      length in bytes of a line in the pixel buffer (optional)
  96  * @return:     status code
  97  */
  98 efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
  99                             u32 operation, efi_uintn_t sx,
 100                             efi_uintn_t sy, efi_uintn_t dx,
 101                             efi_uintn_t dy, efi_uintn_t width,
 102                             efi_uintn_t height, efi_uintn_t delta)
 103 {
 104         struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
 105         efi_uintn_t i, j, linelen;
 106         u32 *fb32 = gopobj->fb;
 107         u16 *fb16 = gopobj->fb;
 108
 109         EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
 110                   buffer, operation, sx, sy, dx, dy, width, height, delta);
 111
 112         if (delta) {
 113                 /* Check for 4 byte alignment */
 114                 if (delta & 3)
 115                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 116                 linelen = delta >> 2;
 117         } else {
 118                 linelen = width;
 119         }
 120
 121         /* Check source rectangle */
 122         switch (operation) {
 123         case EFI_BLT_VIDEO_FILL:
 124                 break;
 125         case EFI_BLT_BUFFER_TO_VIDEO:
 126                 if (sx + width > linelen)
 127                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 128                 break;
 129         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 130         case EFI_BLT_VIDEO_TO_VIDEO:
 131                 if (sx + width > gopobj->info.width ||
 132                     sy + height > gopobj->info.height)
 133                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 134                 break;
 135         default:
 136                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 137         }
 138
 139         /* Check destination rectangle */
 140         switch (operation) {
 141         case EFI_BLT_VIDEO_FILL:
 142         case EFI_BLT_BUFFER_TO_VIDEO:
 143         case EFI_BLT_VIDEO_TO_VIDEO:
 144                 if (dx + width > gopobj->info.width ||
 145                     dy + height > gopobj->info.height)
 146                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 147                 break;
 148         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 149                 if (dx + width > linelen)
 150                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 151                 break;
 152         }
 153
 154         for (i = 0; i < height; i++) {
 155                 for (j = 0; j < width; j++) {
 156                         struct efi_gop_pixel pix;
 157
 158                         /* Read source pixel */
 159                         switch (operation) {
 160                         case EFI_BLT_VIDEO_FILL:
 161                                 pix = *buffer;
 162                                 break;
 163                         case EFI_BLT_BUFFER_TO_VIDEO:
 164                                 pix = buffer[linelen * (i + sy) + j + sx];
 165                                 break;
 166                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 167                         case EFI_BLT_VIDEO_TO_VIDEO:
 168                                 switch (gopobj->bpix) {
 169 #ifdef CONFIG_DM_VIDEO
 170                                 case VIDEO_BPP32:
 171 #else
 172                                 case LCD_COLOR32:
 173 #endif
 174                                         pix = *(struct efi_gop_pixel *)&fb32[
 175                                                 gopobj->info.width *
 176                                                 (i + sy) + j + sx];
 177                                 break;
 178 #ifdef CONFIG_DM_VIDEO
 179                                 case VIDEO_BPP16:
 180 #else
 181                                 case LCD_COLOR16:
 182 #endif
 183                                         pix = efi_vid16_to_blt_col(fb16[
 184                                                 gopobj->info.width *
 185                                                 (i + sy) + j + sx]);
 186                                         break;
 187                                 default:
 188                                         return EFI_EXIT(EFI_UNSUPPORTED);
 189                                 }
 190                                 break;
 191                         }
 192
 193                         /* Write destination pixel */
 194                         switch (operation) {
 195                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 196                                 buffer[linelen * (i + dy) + j + dx] = pix;
 197                                 break;
 198                         case EFI_BLT_BUFFER_TO_VIDEO:
 199                         case EFI_BLT_VIDEO_FILL:
 200                         case EFI_BLT_VIDEO_TO_VIDEO:
 201                                 switch (gopobj->bpix) {
 202 #ifdef CONFIG_DM_VIDEO
 203                                 case VIDEO_BPP32:
 204 #else
 205                                 case LCD_COLOR32:
 206 #endif
 207                                         fb32[gopobj->info.width *
 208                                              (i + dy) + j + dx] = *(u32 *)&pix;
 209                                         break;
 210 #ifdef CONFIG_DM_VIDEO
 211                                 case VIDEO_BPP16:
 212 #else
 213                                 case LCD_COLOR16:
 214 #endif
 215                                         fb16[gopobj->info.width *
 216                                              (i + dy) + j + dx] =
 217                                                 efi_blt_col_to_vid16(&pix);
 218                                         break;
 219                                 default:
 220                                         return EFI_EXIT(EFI_UNSUPPORTED);
 221                                 }
 222                                 break;
 223                         }
 224                 }
 225         }
 226
 227 #ifdef CONFIG_DM_VIDEO
 228         video_sync_all();
 229 #else
 230         lcd_sync();
 231 #endif
 232
 233         return EFI_EXIT(EFI_SUCCESS);
 234 }
 235
 236 /*
 237  * Install graphical output protocol.
 238  *
 239  * If no supported video device exists this is not considered as an
 240  * error.
 241  */
 242 efi_status_t efi_gop_register(void)
 243 {
 244         struct efi_gop_obj *gopobj;
 245         u32 bpix, col, row;
 246         u64 fb_base, fb_size;
 247         void *fb;
 248         efi_status_t ret;
 249
 250 #ifdef CONFIG_DM_VIDEO
 251         struct udevice *vdev;
 252         struct video_priv *priv;
 253
 254         /* We only support a single video output device for now */
 255         if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
 256                 debug("WARNING: No video device\n");
 257                 return EFI_SUCCESS;
 258         }
 259
 260         priv = dev_get_uclass_priv(vdev);
 261         bpix = priv->bpix;
 262         col = video_get_xsize(vdev);
 263         row = video_get_ysize(vdev);
 264         fb_base = (uintptr_t)priv->fb;
 265         fb_size = priv->fb_size;
 266         fb = priv->fb;
 267 #else
 268         int line_len;
 269
 270         bpix = panel_info.vl_bpix;
 271         col = panel_info.vl_col;
 272         row = panel_info.vl_row;
 273         fb_base = gd->fb_base;
 274         fb_size = lcd_get_size(&line_len);
 275         fb = (void*)gd->fb_base;
 276 #endif
 277
 278         switch (bpix) {
 279 #ifdef CONFIG_DM_VIDEO
 280         case VIDEO_BPP16:
 281         case VIDEO_BPP32:
 282 #else
 283         case LCD_COLOR32:
 284         case LCD_COLOR16:
 285 #endif
 286                 break;
 287         default:
 288                 /* So far, we only work in 16 or 32 bit mode */
 289                 debug("WARNING: Unsupported video mode\n");
 290                 return EFI_SUCCESS;
 291         }
 292
 293         gopobj = calloc(1, sizeof(*gopobj));
 294         if (!gopobj) {
 295                 printf("ERROR: Out of memory\n");
 296                 return EFI_OUT_OF_RESOURCES;
 297         }
 298
 299         /* Hook up to the device list */
 300         efi_add_handle(&gopobj->parent);
 301
 302         /* Fill in object data */
 303         ret = efi_add_protocol(gopobj->parent.handle, &efi_gop_guid,
 304                                &gopobj->ops);
 305         if (ret != EFI_SUCCESS) {
 306                 printf("ERROR: Failure adding gop protocol\n");
 307                 return ret;
 308         }
 309         gopobj->ops.query_mode = gop_query_mode;
 310         gopobj->ops.set_mode = gop_set_mode;
 311         gopobj->ops.blt = gop_blt;
 312         gopobj->ops.mode = &gopobj->mode;
 313
 314         gopobj->mode.max_mode = 1;
 315         gopobj->mode.info = &gopobj->info;
 316         gopobj->mode.info_size = sizeof(gopobj->info);
 317
 318 #ifdef CONFIG_DM_VIDEO
 319         if (bpix == VIDEO_BPP32)
 320 #else
 321         if (bpix == LCD_COLOR32)
 322 #endif
 323         {
 324                 /* With 32bit color space we can directly expose the fb */
 325                 gopobj->mode.fb_base = fb_base;
 326                 gopobj->mode.fb_size = fb_size;
 327         }
 328
 329         gopobj->info.version = 0;
 330         gopobj->info.width = col;
 331         gopobj->info.height = row;
 332         gopobj->info.pixel_format = EFI_GOT_RGBA8;
 333         gopobj->info.pixels_per_scanline = col;
 334
 335         gopobj->bpix = bpix;
 336         gopobj->fb = fb;
 337
 338         return EFI_SUCCESS;
 339 }