hw/tcx.c

   1 /*
   2  * QEMU TCX Frame buffer
   3  *
   4  * Copyright (c) 2003-2005 Fabrice Bellard
   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 "console.h"
  26 #include "pixel_ops.h"
  27 #include "sysbus.h"
  28 #include "qdev-addr.h"
  29
  30 #define MAXX 1024
  31 #define MAXY 768
  32 #define TCX_DAC_NREGS 16
  33 #define TCX_THC_NREGS_8  0x081c
  34 #define TCX_THC_NREGS_24 0x1000
  35 #define TCX_TEC_NREGS    0x1000
  36
  37 typedef struct TCXState {
  38     SysBusDevice busdev;
  39     target_phys_addr_t addr;
  40     DisplayState *ds;
  41     uint8_t *vram;
  42     uint32_t *vram24, *cplane;
  43     ram_addr_t vram_offset, vram24_offset, cplane_offset;
  44     uint32_t vram_size;
  45     uint16_t width, height, depth;
  46     uint8_t r[256], g[256], b[256];
  47     uint32_t palette[256];
  48     uint8_t dac_index, dac_state;
  49 } TCXState;
  50
  51 static void tcx_screen_dump(void *opaque, const char *filename);
  52 static void tcx24_screen_dump(void *opaque, const char *filename);
  53
  54 static void tcx_set_dirty(TCXState *s)
  55 {
  56     unsigned int i;
  57
  58     for (i = 0; i < MAXX * MAXY; i += TARGET_PAGE_SIZE) {
  59         cpu_physical_memory_set_dirty(s->vram_offset + i);
  60     }
  61 }
  62
  63 static void tcx24_set_dirty(TCXState *s)
  64 {
  65     unsigned int i;
  66
  67     for (i = 0; i < MAXX * MAXY * 4; i += TARGET_PAGE_SIZE) {
  68         cpu_physical_memory_set_dirty(s->vram24_offset + i);
  69         cpu_physical_memory_set_dirty(s->cplane_offset + i);
  70     }
  71 }
  72
  73 static void update_palette_entries(TCXState *s, int start, int end)
  74 {
  75     int i;
  76     for(i = start; i < end; i++) {
  77         switch(ds_get_bits_per_pixel(s->ds)) {
  78         default:
  79         case 8:
  80             s->palette[i] = rgb_to_pixel8(s->r[i], s->g[i], s->b[i]);
  81             break;
  82         case 15:
  83             s->palette[i] = rgb_to_pixel15(s->r[i], s->g[i], s->b[i]);
  84             break;
  85         case 16:
  86             s->palette[i] = rgb_to_pixel16(s->r[i], s->g[i], s->b[i]);
  87             break;
  88         case 32:
  89             if (is_surface_bgr(s->ds->surface))
  90                 s->palette[i] = rgb_to_pixel32bgr(s->r[i], s->g[i], s->b[i]);
  91             else
  92                 s->palette[i] = rgb_to_pixel32(s->r[i], s->g[i], s->b[i]);
  93             break;
  94         }
  95     }
  96     if (s->depth == 24) {
  97         tcx24_set_dirty(s);
  98     } else {
  99         tcx_set_dirty(s);
 100     }
 101 }
 102
 103 static void tcx_draw_line32(TCXState *s1, uint8_t *d,
 104                             const uint8_t *s, int width)
 105 {
 106     int x;
 107     uint8_t val;
 108     uint32_t *p = (uint32_t *)d;
 109
 110     for(x = 0; x < width; x++) {
 111         val = *s++;
 112         *p++ = s1->palette[val];
 113     }
 114 }
 115
 116 static void tcx_draw_line16(TCXState *s1, uint8_t *d,
 117                             const uint8_t *s, int width)
 118 {
 119     int x;
 120     uint8_t val;
 121     uint16_t *p = (uint16_t *)d;
 122
 123     for(x = 0; x < width; x++) {
 124         val = *s++;
 125         *p++ = s1->palette[val];
 126     }
 127 }
 128
 129 static void tcx_draw_line8(TCXState *s1, uint8_t *d,
 130                            const uint8_t *s, int width)
 131 {
 132     int x;
 133     uint8_t val;
 134
 135     for(x = 0; x < width; x++) {
 136         val = *s++;
 137         *d++ = s1->palette[val];
 138     }
 139 }
 140
 141 /*
 142   XXX Could be much more optimal:
 143   * detect if line/page/whole screen is in 24 bit mode
 144   * if destination is also BGR, use memcpy
 145   */
 146 static inline void tcx24_draw_line32(TCXState *s1, uint8_t *d,
 147                                      const uint8_t *s, int width,
 148                                      const uint32_t *cplane,
 149                                      const uint32_t *s24)
 150 {
 151     int x, bgr, r, g, b;
 152     uint8_t val, *p8;
 153     uint32_t *p = (uint32_t *)d;
 154     uint32_t dval;
 155
 156     bgr = is_surface_bgr(s1->ds->surface);
 157     for(x = 0; x < width; x++, s++, s24++) {
 158         if ((be32_to_cpu(*cplane++) & 0xff000000) == 0x03000000) {
 159             // 24-bit direct, BGR order
 160             p8 = (uint8_t *)s24;
 161             p8++;
 162             b = *p8++;
 163             g = *p8++;
 164             r = *p8;
 165             if (bgr)
 166                 dval = rgb_to_pixel32bgr(r, g, b);
 167             else
 168                 dval = rgb_to_pixel32(r, g, b);
 169         } else {
 170             val = *s;
 171             dval = s1->palette[val];
 172         }
 173         *p++ = dval;
 174     }
 175 }
 176
 177 static inline int check_dirty(ram_addr_t page, ram_addr_t page24,
 178                               ram_addr_t cpage)
 179 {
 180     int ret;
 181     unsigned int off;
 182
 183     ret = cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
 184     for (off = 0; off < TARGET_PAGE_SIZE * 4; off += TARGET_PAGE_SIZE) {
 185         ret |= cpu_physical_memory_get_dirty(page24 + off, VGA_DIRTY_FLAG);
 186         ret |= cpu_physical_memory_get_dirty(cpage + off, VGA_DIRTY_FLAG);
 187     }
 188     return ret;
 189 }
 190
 191 static inline void reset_dirty(TCXState *ts, ram_addr_t page_min,
 192                                ram_addr_t page_max, ram_addr_t page24,
 193                               ram_addr_t cpage)
 194 {
 195     cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 196                                     VGA_DIRTY_FLAG);
 197     page_min -= ts->vram_offset;
 198     page_max -= ts->vram_offset;
 199     cpu_physical_memory_reset_dirty(page24 + page_min * 4,
 200                                     page24 + page_max * 4 + TARGET_PAGE_SIZE,
 201                                     VGA_DIRTY_FLAG);
 202     cpu_physical_memory_reset_dirty(cpage + page_min * 4,
 203                                     cpage + page_max * 4 + TARGET_PAGE_SIZE,
 204                                     VGA_DIRTY_FLAG);
 205 }
 206
 207 /* Fixed line length 1024 allows us to do nice tricks not possible on
 208    VGA... */
 209 static void tcx_update_display(void *opaque)
 210 {
 211     TCXState *ts = opaque;
 212     ram_addr_t page, page_min, page_max;
 213     int y, y_start, dd, ds;
 214     uint8_t *d, *s;
 215     void (*f)(TCXState *s1, uint8_t *dst, const uint8_t *src, int width);
 216
 217     if (ds_get_bits_per_pixel(ts->ds) == 0)
 218         return;
 219     page = ts->vram_offset;
 220     y_start = -1;
 221     page_min = -1;
 222     page_max = 0;
 223     d = ds_get_data(ts->ds);
 224     s = ts->vram;
 225     dd = ds_get_linesize(ts->ds);
 226     ds = 1024;
 227
 228     switch (ds_get_bits_per_pixel(ts->ds)) {
 229     case 32:
 230         f = tcx_draw_line32;
 231         break;
 232     case 15:
 233     case 16:
 234         f = tcx_draw_line16;
 235         break;
 236     default:
 237     case 8:
 238         f = tcx_draw_line8;
 239         break;
 240     case 0:
 241         return;
 242     }
 243
 244     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE) {
 245         if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) {
 246             if (y_start < 0)
 247                 y_start = y;
 248             if (page < page_min)
 249                 page_min = page;
 250             if (page > page_max)
 251                 page_max = page;
 252             f(ts, d, s, ts->width);
 253             d += dd;
 254             s += ds;
 255             f(ts, d, s, ts->width);
 256             d += dd;
 257             s += ds;
 258             f(ts, d, s, ts->width);
 259             d += dd;
 260             s += ds;
 261             f(ts, d, s, ts->width);
 262             d += dd;
 263             s += ds;
 264         } else {
 265             if (y_start >= 0) {
 266                 /* flush to display */
 267                 dpy_update(ts->ds, 0, y_start,
 268                            ts->width, y - y_start);
 269                 y_start = -1;
 270             }
 271             d += dd * 4;
 272             s += ds * 4;
 273         }
 274     }
 275     if (y_start >= 0) {
 276         /* flush to display */
 277         dpy_update(ts->ds, 0, y_start,
 278                    ts->width, y - y_start);
 279     }
 280     /* reset modified pages */
 281     if (page_max >= page_min) {
 282         cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 283                                         VGA_DIRTY_FLAG);
 284     }
 285 }
 286
 287 static void tcx24_update_display(void *opaque)
 288 {
 289     TCXState *ts = opaque;
 290     ram_addr_t page, page_min, page_max, cpage, page24;
 291     int y, y_start, dd, ds;
 292     uint8_t *d, *s;
 293     uint32_t *cptr, *s24;
 294
 295     if (ds_get_bits_per_pixel(ts->ds) != 32)
 296             return;
 297     page = ts->vram_offset;
 298     page24 = ts->vram24_offset;
 299     cpage = ts->cplane_offset;
 300     y_start = -1;
 301     page_min = -1;
 302     page_max = 0;
 303     d = ds_get_data(ts->ds);
 304     s = ts->vram;
 305     s24 = ts->vram24;
 306     cptr = ts->cplane;
 307     dd = ds_get_linesize(ts->ds);
 308     ds = 1024;
 309
 310     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE,
 311             page24 += TARGET_PAGE_SIZE, cpage += TARGET_PAGE_SIZE) {
 312         if (check_dirty(page, page24, cpage)) {
 313             if (y_start < 0)
 314                 y_start = y;
 315             if (page < page_min)
 316                 page_min = page;
 317             if (page > page_max)
 318                 page_max = page;
 319             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 320             d += dd;
 321             s += ds;
 322             cptr += ds;
 323             s24 += ds;
 324             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 325             d += dd;
 326             s += ds;
 327             cptr += ds;
 328             s24 += ds;
 329             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 330             d += dd;
 331             s += ds;
 332             cptr += ds;
 333             s24 += ds;
 334             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 335             d += dd;
 336             s += ds;
 337             cptr += ds;
 338             s24 += ds;
 339         } else {
 340             if (y_start >= 0) {
 341                 /* flush to display */
 342                 dpy_update(ts->ds, 0, y_start,
 343                            ts->width, y - y_start);
 344                 y_start = -1;
 345             }
 346             d += dd * 4;
 347             s += ds * 4;
 348             cptr += ds * 4;
 349             s24 += ds * 4;
 350         }
 351     }
 352     if (y_start >= 0) {
 353         /* flush to display */
 354         dpy_update(ts->ds, 0, y_start,
 355                    ts->width, y - y_start);
 356     }
 357     /* reset modified pages */
 358     if (page_max >= page_min) {
 359         reset_dirty(ts, page_min, page_max, page24, cpage);
 360     }
 361 }
 362
 363 static void tcx_invalidate_display(void *opaque)
 364 {
 365     TCXState *s = opaque;
 366
 367     tcx_set_dirty(s);
 368     qemu_console_resize(s->ds, s->width, s->height);
 369 }
 370
 371 static void tcx24_invalidate_display(void *opaque)
 372 {
 373     TCXState *s = opaque;
 374
 375     tcx_set_dirty(s);
 376     tcx24_set_dirty(s);
 377     qemu_console_resize(s->ds, s->width, s->height);
 378 }
 379
 380 static int vmstate_tcx_post_load(void *opaque, int version_id)
 381 {
 382     TCXState *s = opaque;
 383
 384     update_palette_entries(s, 0, 256);
 385     if (s->depth == 24) {
 386         tcx24_set_dirty(s);
 387     } else {
 388         tcx_set_dirty(s);
 389     }
 390
 391     return 0;
 392 }
 393
 394 static const VMStateDescription vmstate_tcx = {
 395     .name ="tcx",
 396     .version_id = 4,
 397     .minimum_version_id = 4,
 398     .minimum_version_id_old = 4,
 399     .post_load = vmstate_tcx_post_load,
 400     .fields      = (VMStateField []) {
 401         VMSTATE_UINT16(height, TCXState),
 402         VMSTATE_UINT16(width, TCXState),
 403         VMSTATE_UINT16(depth, TCXState),
 404         VMSTATE_BUFFER(r, TCXState),
 405         VMSTATE_BUFFER(g, TCXState),
 406         VMSTATE_BUFFER(b, TCXState),
 407         VMSTATE_UINT8(dac_index, TCXState),
 408         VMSTATE_UINT8(dac_state, TCXState),
 409         VMSTATE_END_OF_LIST()
 410     }
 411 };
 412
 413 static void tcx_reset(DeviceState *d)
 414 {
 415     TCXState *s = container_of(d, TCXState, busdev.qdev);
 416
 417     /* Initialize palette */
 418     memset(s->r, 0, 256);
 419     memset(s->g, 0, 256);
 420     memset(s->b, 0, 256);
 421     s->r[255] = s->g[255] = s->b[255] = 255;
 422     update_palette_entries(s, 0, 256);
 423     memset(s->vram, 0, MAXX*MAXY);
 424     cpu_physical_memory_reset_dirty(s->vram_offset, s->vram_offset +
 425                                     MAXX * MAXY * (1 + 4 + 4), VGA_DIRTY_FLAG);
 426     s->dac_index = 0;
 427     s->dac_state = 0;
 428 }
 429
 430 static uint32_t tcx_dac_readl(void *opaque, target_phys_addr_t addr)
 431 {
 432     return 0;
 433 }
 434
 435 static void tcx_dac_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 436 {
 437     TCXState *s = opaque;
 438
 439     switch (addr) {
 440     case 0:
 441         s->dac_index = val >> 24;
 442         s->dac_state = 0;
 443         break;
 444     case 4:
 445         switch (s->dac_state) {
 446         case 0:
 447             s->r[s->dac_index] = val >> 24;
 448             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 449             s->dac_state++;
 450             break;
 451         case 1:
 452             s->g[s->dac_index] = val >> 24;
 453             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 454             s->dac_state++;
 455             break;
 456         case 2:
 457             s->b[s->dac_index] = val >> 24;
 458             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 459             s->dac_index = (s->dac_index + 1) & 255; // Index autoincrement
 460         default:
 461             s->dac_state = 0;
 462             break;
 463         }
 464         break;
 465     default:
 466         break;
 467     }
 468     return;
 469 }
 470
 471 static CPUReadMemoryFunc * const tcx_dac_read[3] = {
 472     NULL,
 473     NULL,
 474     tcx_dac_readl,
 475 };
 476
 477 static CPUWriteMemoryFunc * const tcx_dac_write[3] = {
 478     NULL,
 479     NULL,
 480     tcx_dac_writel,
 481 };
 482
 483 static uint32_t tcx_dummy_readl(void *opaque, target_phys_addr_t addr)
 484 {
 485     return 0;
 486 }
 487
 488 static void tcx_dummy_writel(void *opaque, target_phys_addr_t addr,
 489                              uint32_t val)
 490 {
 491 }
 492
 493 static CPUReadMemoryFunc * const tcx_dummy_read[3] = {
 494     NULL,
 495     NULL,
 496     tcx_dummy_readl,
 497 };
 498
 499 static CPUWriteMemoryFunc * const tcx_dummy_write[3] = {
 500     NULL,
 501     NULL,
 502     tcx_dummy_writel,
 503 };
 504
 505 static int tcx_init1(SysBusDevice *dev)
 506 {
 507     TCXState *s = FROM_SYSBUS(TCXState, dev);
 508     int io_memory, dummy_memory;
 509     ram_addr_t vram_offset;
 510     int size;
 511     uint8_t *vram_base;
 512
 513     vram_offset = qemu_ram_alloc(NULL, "tcx.vram", s->vram_size * (1 + 4 + 4));
 514     vram_base = qemu_get_ram_ptr(vram_offset);
 515     s->vram_offset = vram_offset;
 516
 517     /* 8-bit plane */
 518     s->vram = vram_base;
 519     size = s->vram_size;
 520     sysbus_init_mmio(dev, size, s->vram_offset);
 521     vram_offset += size;
 522     vram_base += size;
 523
 524     /* DAC */
 525     io_memory = cpu_register_io_memory(tcx_dac_read, tcx_dac_write, s);
 526     sysbus_init_mmio(dev, TCX_DAC_NREGS, io_memory);
 527
 528     /* TEC (dummy) */
 529     dummy_memory = cpu_register_io_memory(tcx_dummy_read, tcx_dummy_write,
 530                                           s);
 531     sysbus_init_mmio(dev, TCX_TEC_NREGS, dummy_memory);
 532     /* THC: NetBSD writes here even with 8-bit display: dummy */
 533     sysbus_init_mmio(dev, TCX_THC_NREGS_24, dummy_memory);
 534
 535     if (s->depth == 24) {
 536         /* 24-bit plane */
 537         size = s->vram_size * 4;
 538         s->vram24 = (uint32_t *)vram_base;
 539         s->vram24_offset = vram_offset;
 540         sysbus_init_mmio(dev, size, vram_offset);
 541         vram_offset += size;
 542         vram_base += size;
 543
 544         /* Control plane */
 545         size = s->vram_size * 4;
 546         s->cplane = (uint32_t *)vram_base;
 547         s->cplane_offset = vram_offset;
 548         sysbus_init_mmio(dev, size, vram_offset);
 549
 550         s->ds = graphic_console_init(tcx24_update_display,
 551                                      tcx24_invalidate_display,
 552                                      tcx24_screen_dump, NULL, s);
 553     } else {
 554         /* THC 8 bit (dummy) */
 555         sysbus_init_mmio(dev, TCX_THC_NREGS_8, dummy_memory);
 556
 557         s->ds = graphic_console_init(tcx_update_display,
 558                                      tcx_invalidate_display,
 559                                      tcx_screen_dump, NULL, s);
 560     }
 561
 562     qemu_console_resize(s->ds, s->width, s->height);
 563     return 0;
 564 }
 565
 566 static void tcx_screen_dump(void *opaque, const char *filename)
 567 {
 568     TCXState *s = opaque;
 569     FILE *f;
 570     uint8_t *d, *d1, v;
 571     int y, x;
 572
 573     f = fopen(filename, "wb");
 574     if (!f)
 575         return;
 576     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 577     d1 = s->vram;
 578     for(y = 0; y < s->height; y++) {
 579         d = d1;
 580         for(x = 0; x < s->width; x++) {
 581             v = *d;
 582             fputc(s->r[v], f);
 583             fputc(s->g[v], f);
 584             fputc(s->b[v], f);
 585             d++;
 586         }
 587         d1 += MAXX;
 588     }
 589     fclose(f);
 590     return;
 591 }
 592
 593 static void tcx24_screen_dump(void *opaque, const char *filename)
 594 {
 595     TCXState *s = opaque;
 596     FILE *f;
 597     uint8_t *d, *d1, v;
 598     uint32_t *s24, *cptr, dval;
 599     int y, x;
 600
 601     f = fopen(filename, "wb");
 602     if (!f)
 603         return;
 604     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 605     d1 = s->vram;
 606     s24 = s->vram24;
 607     cptr = s->cplane;
 608     for(y = 0; y < s->height; y++) {
 609         d = d1;
 610         for(x = 0; x < s->width; x++, d++, s24++) {
 611             if ((*cptr++ & 0xff000000) == 0x03000000) { // 24-bit direct
 612                 dval = *s24 & 0x00ffffff;
 613                 fputc((dval >> 16) & 0xff, f);
 614                 fputc((dval >> 8) & 0xff, f);
 615                 fputc(dval & 0xff, f);
 616             } else {
 617                 v = *d;
 618                 fputc(s->r[v], f);
 619                 fputc(s->g[v], f);
 620                 fputc(s->b[v], f);
 621             }
 622         }
 623         d1 += MAXX;
 624     }
 625     fclose(f);
 626     return;
 627 }
 628
 629 static SysBusDeviceInfo tcx_info = {
 630     .init = tcx_init1,
 631     .qdev.name  = "SUNW,tcx",
 632     .qdev.size  = sizeof(TCXState),
 633     .qdev.reset = tcx_reset,
 634     .qdev.vmsd  = &vmstate_tcx,
 635     .qdev.props = (Property[]) {
 636         DEFINE_PROP_TADDR("addr",      TCXState, addr,      -1),
 637         DEFINE_PROP_HEX32("vram_size", TCXState, vram_size, -1),
 638         DEFINE_PROP_UINT16("width",    TCXState, width,     -1),
 639         DEFINE_PROP_UINT16("height",   TCXState, height,    -1),
 640         DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1),
 641         DEFINE_PROP_END_OF_LIST(),
 642     }
 643 };
 644
 645 static void tcx_register_devices(void)
 646 {
 647     sysbus_register_withprop(&tcx_info);
 648 }
 649
 650 device_init(tcx_register_devices)