hw/syborg_fb.c

   1 /*
   2  * Syborg Framebuffer
   3  *
   4  * Copyright (c) 2009 CodeSourcery
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "sysbus.h"
  26 #include "console.h"
  27 #include "syborg.h"
  28 #include "framebuffer.h"
  29
  30 //#define DEBUG_SYBORG_FB
  31
  32 #ifdef DEBUG_SYBORG_FB
  33 #define DPRINTF(fmt, ...) \
  34 do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)
  35 #define BADF(fmt, ...) \
  36 do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \
  37     exit(1);} while (0)
  38 #else
  39 #define DPRINTF(fmt, ...) do {} while(0)
  40 #define BADF(fmt, ...) \
  41 do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)
  42 #endif
  43
  44 enum {
  45     FB_ID               = 0,
  46     FB_BASE             = 1,
  47     FB_HEIGHT           = 2,
  48     FB_WIDTH            = 3,
  49     FB_ORIENTATION      = 4,
  50     FB_BLANK            = 5,
  51     FB_INT_MASK         = 6,
  52     FB_INTERRUPT_CAUSE  = 7,
  53     FB_BPP              = 8,
  54     FB_COLOR_ORDER      = 9,
  55     FB_BYTE_ORDER       = 10,
  56     FB_PIXEL_ORDER      = 11,
  57     FB_ROW_PITCH        = 12,
  58     FB_ENABLED          = 13,
  59     FB_PALETTE_START    = 0x400 >> 2,
  60     FB_PALETTE_END   = FB_PALETTE_START+256-1,
  61 };
  62
  63 #define FB_INT_VSYNC            (1U << 0)
  64 #define FB_INT_BASE_UPDATE_DONE (1U << 1)
  65
  66 typedef struct {
  67     SysBusDevice busdev;
  68     DisplayState *ds;
  69     /*QEMUConsole *console;*/
  70     uint32_t need_update : 1;
  71     uint32_t need_int : 1;
  72     uint32_t enabled : 1;
  73     uint32_t int_status;
  74     uint32_t int_enable;
  75     qemu_irq irq;
  76
  77     uint32_t base;
  78     uint32_t pitch;
  79     int rows;
  80     int cols;
  81     int blank;
  82     int bpp;
  83     int rgb; /* 0 = BGR, 1 = RGB */
  84     int endian; /* 0 = Little, 1 = Big */
  85     uint32_t raw_palette[256];
  86     uint32_t palette[256];
  87 } SyborgFBState;
  88
  89 enum {
  90     BPP_SRC_1,
  91     BPP_SRC_2,
  92     BPP_SRC_4,
  93     BPP_SRC_8,
  94     BPP_SRC_16,
  95     BPP_SRC_32,
  96     /* TODO: Implement these.  */
  97     BPP_SRC_15 = -1,
  98     BPP_SRC_24 = -2
  99 };
 100
 101 #include "pixel_ops.h"
 102
 103 #define BITS 8
 104 #include "pl110_template.h"
 105 #define BITS 15
 106 #include "pl110_template.h"
 107 #define BITS 16
 108 #include "pl110_template.h"
 109 #define BITS 24
 110 #include "pl110_template.h"
 111 #define BITS 32
 112 #include "pl110_template.h"
 113
 114 /* Update interrupts.  */
 115 static void syborg_fb_update(SyborgFBState *s)
 116 {
 117     if ((s->int_status & s->int_enable) != 0) {
 118         DPRINTF("Raise IRQ\n");
 119         qemu_irq_raise(s->irq);
 120     } else {
 121         DPRINTF("Lower IRQ\n");
 122         qemu_irq_lower(s->irq);
 123     }
 124 }
 125
 126 static int syborg_fb_enabled(const SyborgFBState *s)
 127 {
 128     return s->enabled;
 129 }
 130
 131 static void syborg_fb_update_palette(SyborgFBState *s)
 132 {
 133     int n, i;
 134     uint32_t raw;
 135     unsigned int r, g, b;
 136
 137     switch (s->bpp) {
 138     case BPP_SRC_1: n = 2; break;
 139     case BPP_SRC_2: n = 4; break;
 140     case BPP_SRC_4: n = 16; break;
 141     case BPP_SRC_8: n = 256; break;
 142     default: return;
 143     }
 144
 145     for (i = 0; i < n; i++) {
 146         raw = s->raw_palette[i];
 147         r = (raw >> 16) & 0xff;
 148         g = (raw >> 8) & 0xff;
 149         b = raw & 0xff;
 150         switch (ds_get_bits_per_pixel(s->ds)) {
 151         case 8:
 152             s->palette[i] = rgb_to_pixel8(r, g, b);
 153             break;
 154         case 15:
 155             s->palette[i] = rgb_to_pixel15(r, g, b);
 156             break;
 157         case 16:
 158             s->palette[i] = rgb_to_pixel16(r, g, b);
 159             break;
 160         case 24:
 161         case 32:
 162             s->palette[i] = rgb_to_pixel32(r, g, b);
 163             break;
 164         default:
 165             abort();
 166         }
 167     }
 168
 169 }
 170
 171 static void syborg_fb_update_display(void *opaque)
 172 {
 173     SyborgFBState *s = (SyborgFBState *)opaque;
 174     drawfn* fntable;
 175     drawfn fn;
 176     int dest_width;
 177     int src_width;
 178     int bpp_offset;
 179     int first;
 180     int last;
 181
 182     if (!syborg_fb_enabled(s))
 183         return;
 184
 185     switch (ds_get_bits_per_pixel(s->ds)) {
 186     case 0:
 187         return;
 188     case 8:
 189         fntable = pl110_draw_fn_8;
 190         dest_width = 1;
 191         break;
 192     case 15:
 193         fntable = pl110_draw_fn_15;
 194         dest_width = 2;
 195         break;
 196     case 16:
 197         fntable = pl110_draw_fn_16;
 198         dest_width = 2;
 199         break;
 200     case 24:
 201         fntable = pl110_draw_fn_24;
 202         dest_width = 3;
 203         break;
 204     case 32:
 205         fntable = pl110_draw_fn_32;
 206         dest_width = 4;
 207         break;
 208     default:
 209         fprintf(stderr, "syborg_fb: Bad color depth\n");
 210         exit(1);
 211     }
 212
 213     if (s->need_int) {
 214         s->int_status |= FB_INT_BASE_UPDATE_DONE;
 215         syborg_fb_update(s);
 216         s->need_int = 0;
 217     }
 218
 219     if (s->rgb) {
 220         bpp_offset = 18;
 221     } else {
 222         bpp_offset = 0;
 223     }
 224     if (s->endian) {
 225         bpp_offset += 6;
 226     }
 227
 228     fn = fntable[s->bpp + bpp_offset];
 229
 230     if (s->pitch) {
 231         src_width = s->pitch;
 232     } else {
 233         src_width = s->cols;
 234         switch (s->bpp) {
 235         case BPP_SRC_1:
 236             src_width >>= 3;
 237             break;
 238         case BPP_SRC_2:
 239             src_width >>= 2;
 240             break;
 241         case BPP_SRC_4:
 242             src_width >>= 1;
 243             break;
 244         case BPP_SRC_8:
 245             break;
 246         case BPP_SRC_15:
 247         case BPP_SRC_16:
 248             src_width <<= 1;
 249             break;
 250         case BPP_SRC_24:
 251             src_width *= 3;
 252             break;
 253         case BPP_SRC_32:
 254             src_width <<= 2;
 255             break;
 256         }
 257     }
 258     dest_width *= s->cols;
 259     first = 0;
 260     /* TODO: Implement blanking.  */
 261     if (!s->blank) {
 262         if (s->need_update && s->bpp <= BPP_SRC_8) {
 263             syborg_fb_update_palette(s);
 264         }
 265         framebuffer_update_display(s->ds,
 266                                    s->base, s->cols, s->rows,
 267                                    src_width, dest_width, 0,
 268                                    s->need_update,
 269                                    fn, s->palette,
 270                                    &first, &last);
 271         if (first >= 0) {
 272             dpy_update(s->ds, 0, first, s->cols, last - first + 1);
 273         }
 274
 275         s->int_status |= FB_INT_VSYNC;
 276         syborg_fb_update(s);
 277     }
 278
 279     s->need_update = 0;
 280 }
 281
 282 static void syborg_fb_invalidate_display(void * opaque)
 283 {
 284     SyborgFBState *s = (SyborgFBState *)opaque;
 285     s->need_update = 1;
 286 }
 287
 288 static uint32_t syborg_fb_read(void *opaque, target_phys_addr_t offset)
 289 {
 290     SyborgFBState *s = opaque;
 291
 292     DPRINTF("read reg %d\n", (int)offset);
 293     offset &= 0xfff;
 294     switch (offset >> 2) {
 295     case FB_ID:
 296         return SYBORG_ID_FRAMEBUFFER;
 297
 298     case FB_BASE:
 299         return s->base;
 300
 301     case FB_HEIGHT:
 302         return s->rows;
 303
 304     case FB_WIDTH:
 305         return s->cols;
 306
 307     case FB_ORIENTATION:
 308         return 0;
 309
 310     case FB_BLANK:
 311         return s->blank;
 312
 313     case FB_INT_MASK:
 314         return s->int_enable;
 315
 316     case FB_INTERRUPT_CAUSE:
 317         return s->int_status;
 318
 319     case FB_BPP:
 320         switch (s->bpp) {
 321         case BPP_SRC_1: return 1;
 322         case BPP_SRC_2: return 2;
 323         case BPP_SRC_4: return 4;
 324         case BPP_SRC_8: return 8;
 325         case BPP_SRC_15: return 15;
 326         case BPP_SRC_16: return 16;
 327         case BPP_SRC_24: return 24;
 328         case BPP_SRC_32: return 32;
 329         default: return 0;
 330         }
 331
 332     case FB_COLOR_ORDER:
 333         return s->rgb;
 334
 335     case FB_BYTE_ORDER:
 336         return s->endian;
 337
 338     case FB_PIXEL_ORDER:
 339         return 0;
 340
 341     case FB_ROW_PITCH:
 342         return s->pitch;
 343
 344     case FB_ENABLED:
 345         return s->enabled;
 346
 347     default:
 348         if ((offset >> 2) >= FB_PALETTE_START
 349             && (offset >> 2) <= FB_PALETTE_END) {
 350             return s->raw_palette[(offset >> 2) - FB_PALETTE_START];
 351         } else {
 352             cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",
 353                          (int)offset);
 354         }
 355         return 0;
 356     }
 357 }
 358
 359 static void syborg_fb_write(void *opaque, target_phys_addr_t offset,
 360                             uint32_t val)
 361 {
 362     SyborgFBState *s = opaque;
 363
 364     DPRINTF("write reg %d = %d\n", (int)offset, val);
 365     s->need_update = 1;
 366     offset &= 0xfff;
 367     switch (offset >> 2) {
 368     case FB_BASE:
 369         s->base = val;
 370         s->need_int = 1;
 371         s->need_update = 1;
 372         syborg_fb_update(s);
 373         break;
 374
 375     case FB_HEIGHT:
 376         s->rows = val;
 377         break;
 378
 379     case FB_WIDTH:
 380         s->cols = val;
 381         break;
 382
 383     case FB_ORIENTATION:
 384         /* TODO: Implement rotation.  */
 385         break;
 386
 387     case FB_BLANK:
 388         s->blank = val & 1;
 389         break;
 390
 391     case FB_INT_MASK:
 392         s->int_enable = val;
 393         syborg_fb_update(s);
 394         break;
 395
 396     case FB_INTERRUPT_CAUSE:
 397         s->int_status &= ~val;
 398         syborg_fb_update(s);
 399         break;
 400
 401     case FB_BPP:
 402         switch (val) {
 403         case 1: val = BPP_SRC_1; break;
 404         case 2: val = BPP_SRC_2; break;
 405         case 4: val = BPP_SRC_4; break;
 406         case 8: val = BPP_SRC_8; break;
 407         /* case 15: val = BPP_SRC_15; break; */
 408         case 16: val = BPP_SRC_16; break;
 409         /* case 24: val = BPP_SRC_24; break; */
 410         case 32: val = BPP_SRC_32; break;
 411         default: val = s->bpp; break;
 412         }
 413         s->bpp = val;
 414         break;
 415
 416     case FB_COLOR_ORDER:
 417         s->rgb = (val != 0);
 418         break;
 419
 420     case FB_BYTE_ORDER:
 421         s->endian = (val != 0);
 422         break;
 423
 424     case FB_PIXEL_ORDER:
 425         /* TODO: Implement this.  */
 426         break;
 427
 428     case FB_ROW_PITCH:
 429         s->pitch = val;
 430         break;
 431
 432     case FB_ENABLED:
 433         s->enabled = val;
 434         break;
 435
 436     default:
 437         if ((offset >> 2) >= FB_PALETTE_START
 438             && (offset >> 2) <= FB_PALETTE_END) {
 439             s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;
 440         } else {
 441             cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",
 442                       (int)offset);
 443         }
 444         break;
 445     }
 446 }
 447
 448 static CPUReadMemoryFunc *syborg_fb_readfn[] = {
 449     syborg_fb_read,
 450     syborg_fb_read,
 451     syborg_fb_read
 452 };
 453
 454 static CPUWriteMemoryFunc *syborg_fb_writefn[] = {
 455     syborg_fb_write,
 456     syborg_fb_write,
 457     syborg_fb_write
 458 };
 459
 460 static void syborg_fb_save(QEMUFile *f, void *opaque)
 461 {
 462     SyborgFBState *s = opaque;
 463     int i;
 464
 465     qemu_put_be32(f, s->need_int);
 466     qemu_put_be32(f, s->int_status);
 467     qemu_put_be32(f, s->int_enable);
 468     qemu_put_be32(f, s->enabled);
 469     qemu_put_be32(f, s->base);
 470     qemu_put_be32(f, s->pitch);
 471     qemu_put_be32(f, s->rows);
 472     qemu_put_be32(f, s->cols);
 473     qemu_put_be32(f, s->bpp);
 474     qemu_put_be32(f, s->rgb);
 475     for (i = 0; i < 256; i++) {
 476         qemu_put_be32(f, s->raw_palette[i]);
 477     }
 478 }
 479
 480 static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)
 481 {
 482     SyborgFBState *s = opaque;
 483     int i;
 484
 485     if (version_id != 1)
 486         return -EINVAL;
 487
 488     s->need_int = qemu_get_be32(f);
 489     s->int_status = qemu_get_be32(f);
 490     s->int_enable = qemu_get_be32(f);
 491     s->enabled = qemu_get_be32(f);
 492     s->base = qemu_get_be32(f);
 493     s->pitch = qemu_get_be32(f);
 494     s->rows = qemu_get_be32(f);
 495     s->cols = qemu_get_be32(f);
 496     s->bpp = qemu_get_be32(f);
 497     s->rgb = qemu_get_be32(f);
 498     for (i = 0; i < 256; i++) {
 499         s->raw_palette[i] = qemu_get_be32(f);
 500     }
 501     s->need_update = 1;
 502
 503     return 0;
 504 }
 505
 506 static void syborg_fb_init(SysBusDevice *dev)
 507 {
 508     SyborgFBState *s = FROM_SYSBUS(SyborgFBState, dev);
 509     int iomemtype;
 510     int width;
 511     int height;
 512
 513     sysbus_init_irq(dev, &s->irq);
 514     iomemtype = cpu_register_io_memory(0, syborg_fb_readfn,
 515                                        syborg_fb_writefn, s);
 516     sysbus_init_mmio(dev, 0x1000, iomemtype);
 517
 518     width = qdev_get_prop_int(&dev->qdev, "width", 0);
 519     height = qdev_get_prop_int(&dev->qdev, "height", 0);
 520
 521     s->ds = graphic_console_init(syborg_fb_update_display,
 522                                  syborg_fb_invalidate_display,
 523                                  NULL, NULL, s);
 524
 525     if (width != 0 && height != 0) {
 526         qemu_console_resize(s->ds, width, height);
 527     }
 528
 529     if (!width)
 530         width = ds_get_width(s->ds);
 531     if (!height)
 532         height = ds_get_height(s->ds);
 533
 534     s->cols = width;
 535     s->rows = height;
 536
 537     register_savevm("syborg_framebuffer", -1, 1,
 538                     syborg_fb_save, syborg_fb_load, s);
 539 }
 540
 541 static void syborg_fb_register_devices(void)
 542 {
 543     sysbus_register_dev("syborg,framebuffer", sizeof(SyborgFBState),
 544                         syborg_fb_init);
 545 }
 546
 547 device_init(syborg_fb_register_devices)