hw/arm/syborg_fb.c

   1 /*
   2  * Syborg Framebuffer
   3  *
   4  * Copyright (c) 2009 CodeSourcery
   5  * Copyright (c) 2010, 2013 Stefan Weil
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "qemu/osdep.h"
  27 #include "hw/sysbus.h"
  28 #include "migration/register.h"  /* register_savevm_live */
  29 #include "ui/console.h"
  30 #include "syborg.h"
  31 #include "framebuffer.h"
  32
  33 //#define DEBUG_SYBORG_FB
  34
  35 #ifdef DEBUG_SYBORG_FB
  36 #define DPRINTF(fmt, ...) \
  37 do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)
  38 #define BADF(fmt, ...) \
  39 do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \
  40     exit(1);} while (0)
  41 #else
  42 #define DPRINTF(fmt, ...) do {} while(0)
  43 #define BADF(fmt, ...) \
  44 do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)
  45 #endif
  46
  47 enum {
  48     FB_ID               = 0,
  49     FB_BASE             = 1,
  50     FB_HEIGHT           = 2,
  51     FB_WIDTH            = 3,
  52     FB_ORIENTATION      = 4,
  53     FB_BLANK            = 5,
  54     FB_INT_MASK         = 6,
  55     FB_INTERRUPT_CAUSE  = 7,
  56     FB_BPP              = 8,
  57     FB_COLOR_ORDER      = 9,
  58     FB_BYTE_ORDER       = 10,
  59     FB_PIXEL_ORDER      = 11,
  60     FB_ROW_PITCH        = 12,
  61     FB_ENABLED          = 13,
  62     FB_PALETTE_START    = 0x400 >> 2,
  63     FB_PALETTE_END   = FB_PALETTE_START+256-1,
  64 };
  65
  66 #define FB_INT_VSYNC            (1U << 0)
  67 #define FB_INT_BASE_UPDATE_DONE (1U << 1)
  68
  69 typedef struct {
  70     SysBusDevice busdev;
  71     MemoryRegion iomem;
  72     QemuConsole *con;
  73     uint32_t need_update : 1;
  74     uint32_t need_int : 1;
  75     uint32_t enabled : 1;
  76     uint32_t int_status;
  77     uint32_t int_enable;
  78     qemu_irq irq;
  79
  80     uint32_t base;
  81     uint32_t pitch;
  82     uint32_t rows;
  83     uint32_t cols;
  84     int blank;
  85     int bpp;
  86     int rgb; /* 0 = BGR, 1 = RGB */
  87     int endian; /* 0 = Little, 1 = Big */
  88     uint32_t raw_palette[256];
  89     uint32_t palette[256];
  90 } SyborgFBState;
  91
  92 enum {
  93     BPP_SRC_1,
  94     BPP_SRC_2,
  95     BPP_SRC_4,
  96     BPP_SRC_8,
  97     BPP_SRC_16,
  98     BPP_SRC_32,
  99     /* TODO: Implement these.  */
 100     BPP_SRC_15 = -1,
 101     BPP_SRC_24 = -2
 102 };
 103
 104 #include "ui/pixel_ops.h"
 105
 106 #define BITS 8
 107 #include "pl110_template.h"
 108 #define BITS 15
 109 #include "pl110_template.h"
 110 #define BITS 16
 111 #include "pl110_template.h"
 112 #define BITS 24
 113 #include "pl110_template.h"
 114 #define BITS 32
 115 #include "pl110_template.h"
 116
 117 /* Update interrupts.  */
 118 static void syborg_fb_update(SyborgFBState *s)
 119 {
 120     if ((s->int_status & s->int_enable) != 0) {
 121         DPRINTF("Raise IRQ\n");
 122         qemu_irq_raise(s->irq);
 123     } else {
 124         DPRINTF("Lower IRQ\n");
 125         qemu_irq_lower(s->irq);
 126     }
 127 }
 128
 129 static int syborg_fb_enabled(const SyborgFBState *s)
 130 {
 131     return s->enabled;
 132 }
 133
 134 static void syborg_fb_update_palette(SyborgFBState *s)
 135 {
 136     int n, i;
 137     uint32_t raw;
 138     unsigned int r, g, b;
 139     DisplaySurface *surface = qemu_console_surface(s->con);
 140
 141     switch (s->bpp) {
 142     case BPP_SRC_1: n = 2; break;
 143     case BPP_SRC_2: n = 4; break;
 144     case BPP_SRC_4: n = 16; break;
 145     case BPP_SRC_8: n = 256; break;
 146     default: return;
 147     }
 148
 149     for (i = 0; i < n; i++) {
 150         raw = s->raw_palette[i];
 151         r = (raw >> 16) & 0xff;
 152         g = (raw >> 8) & 0xff;
 153         b = raw & 0xff;
 154         switch (surface_bits_per_pixel(surface)) {
 155         case 8:
 156             s->palette[i] = rgb_to_pixel8(r, g, b);
 157             break;
 158         case 15:
 159             s->palette[i] = rgb_to_pixel15(r, g, b);
 160             break;
 161         case 16:
 162             s->palette[i] = rgb_to_pixel16(r, g, b);
 163             break;
 164         case 24:
 165         case 32:
 166             s->palette[i] = rgb_to_pixel32(r, g, b);
 167             break;
 168         default:
 169             abort();
 170         }
 171     }
 172
 173 }
 174
 175 static void syborg_fb_update_display(void *opaque)
 176 {
 177     SyborgFBState *s = (SyborgFBState *)opaque;
 178     DisplaySurface *surface = qemu_console_surface(s->con);
 179     drawfn* fntable;
 180     drawfn fn;
 181     int dest_width;
 182     int src_width;
 183     int bpp_offset;
 184     int first;
 185     int last;
 186
 187     if (!syborg_fb_enabled(s))
 188         return;
 189
 190     switch (surface_bits_per_pixel(surface)) {
 191     case 0:
 192         return;
 193     case 8:
 194         fntable = pl110_draw_fn_8;
 195         dest_width = 1;
 196         break;
 197     case 15:
 198         fntable = pl110_draw_fn_15;
 199         dest_width = 2;
 200         break;
 201     case 16:
 202         fntable = pl110_draw_fn_16;
 203         dest_width = 2;
 204         break;
 205     case 24:
 206         fntable = pl110_draw_fn_24;
 207         dest_width = 3;
 208         break;
 209     case 32:
 210         fntable = pl110_draw_fn_32;
 211         dest_width = 4;
 212         break;
 213     default:
 214         fprintf(stderr, "syborg_fb: Bad color depth\n");
 215         exit(1);
 216     }
 217
 218     if (s->need_int) {
 219         s->int_status |= FB_INT_BASE_UPDATE_DONE;
 220         syborg_fb_update(s);
 221         s->need_int = 0;
 222     }
 223
 224     if (s->rgb) {
 225         bpp_offset = 24;
 226     } else {
 227         bpp_offset = 0;
 228     }
 229     if (s->endian) {
 230         bpp_offset += 8;
 231     }
 232     /* Our bpp constants mostly match the PL110/PL111 but
 233      * not for the 16 bit case
 234      */
 235     switch (s->bpp) {
 236     case BPP_SRC_16:
 237         bpp_offset += 6;
 238         break;
 239     default:
 240         bpp_offset += s->bpp;
 241     }
 242     fn = fntable[bpp_offset];
 243
 244     if (s->pitch) {
 245         src_width = s->pitch;
 246     } else {
 247         src_width = s->cols;
 248         switch (s->bpp) {
 249         case BPP_SRC_1:
 250             src_width >>= 3;
 251             break;
 252         case BPP_SRC_2:
 253             src_width >>= 2;
 254             break;
 255         case BPP_SRC_4:
 256             src_width >>= 1;
 257             break;
 258         case BPP_SRC_8:
 259             break;
 260         case BPP_SRC_15:
 261         case BPP_SRC_16:
 262             src_width <<= 1;
 263             break;
 264         case BPP_SRC_24:
 265             src_width *= 3;
 266             break;
 267         case BPP_SRC_32:
 268             src_width <<= 2;
 269             break;
 270         }
 271     }
 272     dest_width *= s->cols;
 273     first = 0;
 274     /* TODO: Implement blanking.  */
 275     if (!s->blank) {
 276         if (s->need_update && s->bpp <= BPP_SRC_8) {
 277             syborg_fb_update_palette(s);
 278         }
 279         framebuffer_update_display(surface,
 280                                    sysbus_address_space(&s->busdev),
 281                                    s->base, s->cols, s->rows,
 282                                    src_width, dest_width, 0,
 283                                    s->need_update,
 284                                    fn, s->palette,
 285                                    &first, &last);
 286         if (first >= 0) {
 287             dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
 288         }
 289
 290         s->int_status |= FB_INT_VSYNC;
 291         syborg_fb_update(s);
 292     }
 293
 294     s->need_update = 0;
 295 }
 296
 297 static void syborg_fb_invalidate_display(void * opaque)
 298 {
 299     SyborgFBState *s = (SyborgFBState *)opaque;
 300     s->need_update = 1;
 301 }
 302
 303 static uint64_t syborg_fb_read(void *opaque, hwaddr offset,
 304                                unsigned size)
 305 {
 306     SyborgFBState *s = opaque;
 307
 308     DPRINTF("read reg %d\n", (int)offset);
 309     offset &= 0xfff;
 310     switch (offset >> 2) {
 311     case FB_ID:
 312         return SYBORG_ID_FRAMEBUFFER;
 313
 314     case FB_BASE:
 315         return s->base;
 316
 317     case FB_HEIGHT:
 318         return s->rows;
 319
 320     case FB_WIDTH:
 321         return s->cols;
 322
 323     case FB_ORIENTATION:
 324         return 0;
 325
 326     case FB_BLANK:
 327         return s->blank;
 328
 329     case FB_INT_MASK:
 330         return s->int_enable;
 331
 332     case FB_INTERRUPT_CAUSE:
 333         return s->int_status;
 334
 335     case FB_BPP:
 336         switch (s->bpp) {
 337         case BPP_SRC_1: return 1;
 338         case BPP_SRC_2: return 2;
 339         case BPP_SRC_4: return 4;
 340         case BPP_SRC_8: return 8;
 341         case BPP_SRC_15: return 15;
 342         case BPP_SRC_16: return 16;
 343         case BPP_SRC_24: return 24;
 344         case BPP_SRC_32: return 32;
 345         default: return 0;
 346         }
 347
 348     case FB_COLOR_ORDER:
 349         return s->rgb;
 350
 351     case FB_BYTE_ORDER:
 352         return s->endian;
 353
 354     case FB_PIXEL_ORDER:
 355         return 0;
 356
 357     case FB_ROW_PITCH:
 358         return s->pitch;
 359
 360     case FB_ENABLED:
 361         return s->enabled;
 362
 363     default:
 364         if ((offset >> 2) >= FB_PALETTE_START
 365             && (offset >> 2) <= FB_PALETTE_END) {
 366             return s->raw_palette[(offset >> 2) - FB_PALETTE_START];
 367         } else {
 368             cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",
 369                          (int)offset);
 370         }
 371         return 0;
 372     }
 373 }
 374
 375 static void syborg_fb_write(void *opaque, hwaddr offset,
 376                             uint64_t val, unsigned size)
 377 {
 378     SyborgFBState *s = opaque;
 379
 380     DPRINTF("write reg %d = %d\n", (int)offset, val);
 381     s->need_update = 1;
 382     offset &= 0xfff;
 383     switch (offset >> 2) {
 384     case FB_BASE:
 385         s->base = val;
 386         s->need_int = 1;
 387         s->need_update = 1;
 388         syborg_fb_update(s);
 389         break;
 390
 391     case FB_HEIGHT:
 392         s->rows = val;
 393         break;
 394
 395     case FB_WIDTH:
 396         s->cols = val;
 397         break;
 398
 399     case FB_ORIENTATION:
 400         /* TODO: Implement rotation.  */
 401         break;
 402
 403     case FB_BLANK:
 404         s->blank = val & 1;
 405         break;
 406
 407     case FB_INT_MASK:
 408         s->int_enable = val;
 409         syborg_fb_update(s);
 410         break;
 411
 412     case FB_INTERRUPT_CAUSE:
 413         s->int_status &= ~val;
 414         syborg_fb_update(s);
 415         break;
 416
 417     case FB_BPP:
 418         switch (val) {
 419         case 1: val = BPP_SRC_1; break;
 420         case 2: val = BPP_SRC_2; break;
 421         case 4: val = BPP_SRC_4; break;
 422         case 8: val = BPP_SRC_8; break;
 423         /* case 15: val = BPP_SRC_15; break; */
 424         case 16: val = BPP_SRC_16; break;
 425         /* case 24: val = BPP_SRC_24; break; */
 426         case 32: val = BPP_SRC_32; break;
 427         default: val = s->bpp; break;
 428         }
 429         s->bpp = val;
 430         break;
 431
 432     case FB_COLOR_ORDER:
 433         s->rgb = (val != 0);
 434         break;
 435
 436     case FB_BYTE_ORDER:
 437         s->endian = (val != 0);
 438         break;
 439
 440     case FB_PIXEL_ORDER:
 441         /* TODO: Implement this.  */
 442         break;
 443
 444     case FB_ROW_PITCH:
 445         s->pitch = val;
 446         break;
 447
 448     case FB_ENABLED:
 449         s->enabled = val;
 450         break;
 451
 452     default:
 453         if ((offset >> 2) >= FB_PALETTE_START
 454             && (offset >> 2) <= FB_PALETTE_END) {
 455             s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;
 456         } else {
 457             cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",
 458                       (int)offset);
 459         }
 460         break;
 461     }
 462 }
 463
 464 static const MemoryRegionOps syborg_fb_ops = {
 465     .read = syborg_fb_read,
 466     .write = syborg_fb_write,
 467     .endianness = DEVICE_NATIVE_ENDIAN,
 468 };
 469
 470 static void syborg_fb_save(QEMUFile *f, void *opaque)
 471 {
 472     SyborgFBState *s = opaque;
 473     int i;
 474
 475     qemu_put_be32(f, s->need_int);
 476     qemu_put_be32(f, s->int_status);
 477     qemu_put_be32(f, s->int_enable);
 478     qemu_put_be32(f, s->enabled);
 479     qemu_put_be32(f, s->base);
 480     qemu_put_be32(f, s->pitch);
 481     qemu_put_be32(f, s->rows);
 482     qemu_put_be32(f, s->cols);
 483     qemu_put_be32(f, s->bpp);
 484     qemu_put_be32(f, s->rgb);
 485     for (i = 0; i < 256; i++) {
 486         qemu_put_be32(f, s->raw_palette[i]);
 487     }
 488 }
 489
 490 static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)
 491 {
 492     SyborgFBState *s = opaque;
 493     int i;
 494
 495     if (version_id != 1)
 496         return -EINVAL;
 497
 498     s->need_int = qemu_get_be32(f);
 499     s->int_status = qemu_get_be32(f);
 500     s->int_enable = qemu_get_be32(f);
 501     s->enabled = qemu_get_be32(f);
 502     s->base = qemu_get_be32(f);
 503     s->pitch = qemu_get_be32(f);
 504     s->rows = qemu_get_be32(f);
 505     s->cols = qemu_get_be32(f);
 506     s->bpp = qemu_get_be32(f);
 507     s->rgb = qemu_get_be32(f);
 508     for (i = 0; i < 256; i++) {
 509         s->raw_palette[i] = qemu_get_be32(f);
 510     }
 511     s->need_update = 1;
 512
 513     return 0;
 514 }
 515
 516 static SaveVMHandlers savevm_syborg_fb = {
 517     .save_state = syborg_fb_save,
 518     .load_state = syborg_fb_load
 519 };
 520
 521 static int syborg_fb_init(SysBusDevice *sbd)
 522 {
 523     DeviceState *dev = DEVICE(sbd);
 524     SyborgFBState *s = SYBORG_FB(dev);
 525     DisplaySurface *surface;
 526
 527     sysbus_init_irq(dev, &s->irq);
 528     memory_region_init_io(&s->iomem, &syborg_fb_ops, s,
 529                           "framebuffer", 0x1000);
 530     sysbus_init_mmio(sbd, &s->iomem);
 531
 532     s->con = graphic_console_init(DEVICE(dev), &syborg_fb_ops, s);
 533 //~ syborg_fb_update_display,
 534 //~ syborg_fb_invalidate_display,
 535
 536     surface = qemu_console_surface(s->con);
 537
 538     if (s->cols != 0 && s->rows != 0) {
 539         qemu_console_resize(s->con, s->cols, s->rows);
 540     }
 541
 542     if (!s->cols) {
 543         s->cols = surface_width(surface);
 544     }
 545     if (!s->rows) {
 546         s->rows = surface_height(surface);
 547     }
 548
 549     register_savevm_live(&dev->qdev, "syborg_framebuffer", -1, 1,
 550                          &savevm_syborg_fb, s);
 551     return 0;
 552 }
 553
 554 static Property syborg_fb_properties[] = {
 555     DEFINE_PROP_UINT32("width",  SyborgFBState, cols, 0),
 556     DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0),
 557     DEFINE_PROP_END_OF_LIST()
 558 };
 559
 560 static void syborg_fb_class_init(ObjectClass *klass, void *data)
 561 {
 562     DeviceClass *dc = DEVICE_CLASS(klass);
 563     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 564     dc->props = syborg_fb_properties;
 565     k->init = syborg_fb_init;
 566 }
 567
 568 static const TypeInfo syborg_fb_info = {
 569     .name  = "syborg,framebuffer",
 570     .parent = TYPE_SYS_BUS_DEVICE,
 571     .instance_size  = sizeof(SyborgFBState),
 572     .class_init = syborg_fb_class_init
 573 };
 574
 575 static void syborg_fb_register_types(void)
 576 {
 577     type_register_static(&syborg_fb_info);
 578 }
 579
 580 type_init(syborg_fb_register_types)