hw/pl110.c

   1 /*
   2  * Arm PrimeCell PL110 Color LCD Controller
   3  *
   4  * Copyright (c) 2005-2009 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GNU LGPL
   8  */
   9
  10 #include "hw/sysbus.h"
  11 #include "ui/console.h"
  12 #include "hw/framebuffer.h"
  13 #include "ui/pixel_ops.h"
  14
  15 #define PL110_CR_EN   0x001
  16 #define PL110_CR_BGR  0x100
  17 #define PL110_CR_BEBO 0x200
  18 #define PL110_CR_BEPO 0x400
  19 #define PL110_CR_PWR  0x800
  20
  21 enum pl110_bppmode
  22 {
  23     BPP_1,
  24     BPP_2,
  25     BPP_4,
  26     BPP_8,
  27     BPP_16,
  28     BPP_32,
  29     BPP_16_565, /* PL111 only */
  30     BPP_12      /* PL111 only */
  31 };
  32
  33
  34 /* The Versatile/PB uses a slightly modified PL110 controller.  */
  35 enum pl110_version
  36 {
  37     PL110,
  38     PL110_VERSATILE,
  39     PL111
  40 };
  41
  42 typedef struct {
  43     SysBusDevice busdev;
  44     MemoryRegion iomem;
  45     QemuConsole *con;
  46
  47     int version;
  48     uint32_t timing[4];
  49     uint32_t cr;
  50     uint32_t upbase;
  51     uint32_t lpbase;
  52     uint32_t int_status;
  53     uint32_t int_mask;
  54     int cols;
  55     int rows;
  56     enum pl110_bppmode bpp;
  57     int invalidate;
  58     uint32_t mux_ctrl;
  59     uint32_t palette[256];
  60     uint32_t raw_palette[128];
  61     qemu_irq irq;
  62 } pl110_state;
  63
  64 static int vmstate_pl110_post_load(void *opaque, int version_id);
  65
  66 static const VMStateDescription vmstate_pl110 = {
  67     .name = "pl110",
  68     .version_id = 2,
  69     .minimum_version_id = 1,
  70     .post_load = vmstate_pl110_post_load,
  71     .fields = (VMStateField[]) {
  72         VMSTATE_INT32(version, pl110_state),
  73         VMSTATE_UINT32_ARRAY(timing, pl110_state, 4),
  74         VMSTATE_UINT32(cr, pl110_state),
  75         VMSTATE_UINT32(upbase, pl110_state),
  76         VMSTATE_UINT32(lpbase, pl110_state),
  77         VMSTATE_UINT32(int_status, pl110_state),
  78         VMSTATE_UINT32(int_mask, pl110_state),
  79         VMSTATE_INT32(cols, pl110_state),
  80         VMSTATE_INT32(rows, pl110_state),
  81         VMSTATE_UINT32(bpp, pl110_state),
  82         VMSTATE_INT32(invalidate, pl110_state),
  83         VMSTATE_UINT32_ARRAY(palette, pl110_state, 256),
  84         VMSTATE_UINT32_ARRAY(raw_palette, pl110_state, 128),
  85         VMSTATE_UINT32_V(mux_ctrl, pl110_state, 2),
  86         VMSTATE_END_OF_LIST()
  87     }
  88 };
  89
  90 static const unsigned char pl110_id[] =
  91 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  92
  93 /* The Arm documentation (DDI0224C) says the CLDC on the Versatile board
  94    has a different ID.  However Linux only looks for the normal ID.  */
  95 #if 0
  96 static const unsigned char pl110_versatile_id[] =
  97 { 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  98 #else
  99 #define pl110_versatile_id pl110_id
 100 #endif
 101
 102 static const unsigned char pl111_id[] = {
 103     0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
 104 };
 105
 106 /* Indexed by pl110_version */
 107 static const unsigned char *idregs[] = {
 108     pl110_id,
 109     pl110_versatile_id,
 110     pl111_id
 111 };
 112
 113 #define BITS 8
 114 #include "hw/pl110_template.h"
 115 #define BITS 15
 116 #include "hw/pl110_template.h"
 117 #define BITS 16
 118 #include "hw/pl110_template.h"
 119 #define BITS 24
 120 #include "hw/pl110_template.h"
 121 #define BITS 32
 122 #include "hw/pl110_template.h"
 123
 124 static int pl110_enabled(pl110_state *s)
 125 {
 126   return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
 127 }
 128
 129 static void pl110_update_display(void *opaque)
 130 {
 131     pl110_state *s = (pl110_state *)opaque;
 132     DisplaySurface *surface = qemu_console_surface(s->con);
 133     drawfn* fntable;
 134     drawfn fn;
 135     int dest_width;
 136     int src_width;
 137     int bpp_offset;
 138     int first;
 139     int last;
 140
 141     if (!pl110_enabled(s))
 142         return;
 143
 144     switch (surface_bits_per_pixel(surface)) {
 145     case 0:
 146         return;
 147     case 8:
 148         fntable = pl110_draw_fn_8;
 149         dest_width = 1;
 150         break;
 151     case 15:
 152         fntable = pl110_draw_fn_15;
 153         dest_width = 2;
 154         break;
 155     case 16:
 156         fntable = pl110_draw_fn_16;
 157         dest_width = 2;
 158         break;
 159     case 24:
 160         fntable = pl110_draw_fn_24;
 161         dest_width = 3;
 162         break;
 163     case 32:
 164         fntable = pl110_draw_fn_32;
 165         dest_width = 4;
 166         break;
 167     default:
 168         fprintf(stderr, "pl110: Bad color depth\n");
 169         exit(1);
 170     }
 171     if (s->cr & PL110_CR_BGR)
 172         bpp_offset = 0;
 173     else
 174         bpp_offset = 24;
 175
 176     if ((s->version != PL111) && (s->bpp == BPP_16)) {
 177         /* The PL110's native 16 bit mode is 5551; however
 178          * most boards with a PL110 implement an external
 179          * mux which allows bits to be reshuffled to give
 180          * 565 format. The mux is typically controlled by
 181          * an external system register.
 182          * This is controlled by a GPIO input pin
 183          * so boards can wire it up to their register.
 184          *
 185          * The PL111 straightforwardly implements both
 186          * 5551 and 565 under control of the bpp field
 187          * in the LCDControl register.
 188          */
 189         switch (s->mux_ctrl) {
 190         case 3: /* 565 BGR */
 191             bpp_offset = (BPP_16_565 - BPP_16);
 192             break;
 193         case 1: /* 5551 */
 194             break;
 195         case 0: /* 888; also if we have loaded vmstate from an old version */
 196         case 2: /* 565 RGB */
 197         default:
 198             /* treat as 565 but honour BGR bit */
 199             bpp_offset += (BPP_16_565 - BPP_16);
 200             break;
 201         }
 202     }
 203
 204     if (s->cr & PL110_CR_BEBO)
 205         fn = fntable[s->bpp + 8 + bpp_offset];
 206     else if (s->cr & PL110_CR_BEPO)
 207         fn = fntable[s->bpp + 16 + bpp_offset];
 208     else
 209         fn = fntable[s->bpp + bpp_offset];
 210
 211     src_width = s->cols;
 212     switch (s->bpp) {
 213     case BPP_1:
 214         src_width >>= 3;
 215         break;
 216     case BPP_2:
 217         src_width >>= 2;
 218         break;
 219     case BPP_4:
 220         src_width >>= 1;
 221         break;
 222     case BPP_8:
 223         break;
 224     case BPP_16:
 225     case BPP_16_565:
 226     case BPP_12:
 227         src_width <<= 1;
 228         break;
 229     case BPP_32:
 230         src_width <<= 2;
 231         break;
 232     }
 233     dest_width *= s->cols;
 234     first = 0;
 235     framebuffer_update_display(surface, sysbus_address_space(&s->busdev),
 236                                s->upbase, s->cols, s->rows,
 237                                src_width, dest_width, 0,
 238                                s->invalidate,
 239                                fn, s->palette,
 240                                &first, &last);
 241     if (first >= 0) {
 242         dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
 243     }
 244     s->invalidate = 0;
 245 }
 246
 247 static void pl110_invalidate_display(void * opaque)
 248 {
 249     pl110_state *s = (pl110_state *)opaque;
 250     s->invalidate = 1;
 251     if (pl110_enabled(s)) {
 252         qemu_console_resize(s->con, s->cols, s->rows);
 253     }
 254 }
 255
 256 static void pl110_update_palette(pl110_state *s, int n)
 257 {
 258     DisplaySurface *surface = qemu_console_surface(s->con);
 259     int i;
 260     uint32_t raw;
 261     unsigned int r, g, b;
 262
 263     raw = s->raw_palette[n];
 264     n <<= 1;
 265     for (i = 0; i < 2; i++) {
 266         r = (raw & 0x1f) << 3;
 267         raw >>= 5;
 268         g = (raw & 0x1f) << 3;
 269         raw >>= 5;
 270         b = (raw & 0x1f) << 3;
 271         /* The I bit is ignored.  */
 272         raw >>= 6;
 273         switch (surface_bits_per_pixel(surface)) {
 274         case 8:
 275             s->palette[n] = rgb_to_pixel8(r, g, b);
 276             break;
 277         case 15:
 278             s->palette[n] = rgb_to_pixel15(r, g, b);
 279             break;
 280         case 16:
 281             s->palette[n] = rgb_to_pixel16(r, g, b);
 282             break;
 283         case 24:
 284         case 32:
 285             s->palette[n] = rgb_to_pixel32(r, g, b);
 286             break;
 287         }
 288         n++;
 289     }
 290 }
 291
 292 static void pl110_resize(pl110_state *s, int width, int height)
 293 {
 294     if (width != s->cols || height != s->rows) {
 295         if (pl110_enabled(s)) {
 296             qemu_console_resize(s->con, width, height);
 297         }
 298     }
 299     s->cols = width;
 300     s->rows = height;
 301 }
 302
 303 /* Update interrupts.  */
 304 static void pl110_update(pl110_state *s)
 305 {
 306   /* TODO: Implement interrupts.  */
 307 }
 308
 309 static uint64_t pl110_read(void *opaque, hwaddr offset,
 310                            unsigned size)
 311 {
 312     pl110_state *s = (pl110_state *)opaque;
 313
 314     if (offset >= 0xfe0 && offset < 0x1000) {
 315         return idregs[s->version][(offset - 0xfe0) >> 2];
 316     }
 317     if (offset >= 0x200 && offset < 0x400) {
 318         return s->raw_palette[(offset - 0x200) >> 2];
 319     }
 320     switch (offset >> 2) {
 321     case 0: /* LCDTiming0 */
 322         return s->timing[0];
 323     case 1: /* LCDTiming1 */
 324         return s->timing[1];
 325     case 2: /* LCDTiming2 */
 326         return s->timing[2];
 327     case 3: /* LCDTiming3 */
 328         return s->timing[3];
 329     case 4: /* LCDUPBASE */
 330         return s->upbase;
 331     case 5: /* LCDLPBASE */
 332         return s->lpbase;
 333     case 6: /* LCDIMSC */
 334         if (s->version != PL110) {
 335             return s->cr;
 336         }
 337         return s->int_mask;
 338     case 7: /* LCDControl */
 339         if (s->version != PL110) {
 340             return s->int_mask;
 341         }
 342         return s->cr;
 343     case 8: /* LCDRIS */
 344         return s->int_status;
 345     case 9: /* LCDMIS */
 346         return s->int_status & s->int_mask;
 347     case 11: /* LCDUPCURR */
 348         /* TODO: Implement vertical refresh.  */
 349         return s->upbase;
 350     case 12: /* LCDLPCURR */
 351         return s->lpbase;
 352     default:
 353         qemu_log_mask(LOG_GUEST_ERROR,
 354                       "pl110_read: Bad offset %x\n", (int)offset);
 355         return 0;
 356     }
 357 }
 358
 359 static void pl110_write(void *opaque, hwaddr offset,
 360                         uint64_t val, unsigned size)
 361 {
 362     pl110_state *s = (pl110_state *)opaque;
 363     int n;
 364
 365     /* For simplicity invalidate the display whenever a control register
 366        is written to.  */
 367     s->invalidate = 1;
 368     if (offset >= 0x200 && offset < 0x400) {
 369         /* Palette.  */
 370         n = (offset - 0x200) >> 2;
 371         s->raw_palette[(offset - 0x200) >> 2] = val;
 372         pl110_update_palette(s, n);
 373         return;
 374     }
 375     switch (offset >> 2) {
 376     case 0: /* LCDTiming0 */
 377         s->timing[0] = val;
 378         n = ((val & 0xfc) + 4) * 4;
 379         pl110_resize(s, n, s->rows);
 380         break;
 381     case 1: /* LCDTiming1 */
 382         s->timing[1] = val;
 383         n = (val & 0x3ff) + 1;
 384         pl110_resize(s, s->cols, n);
 385         break;
 386     case 2: /* LCDTiming2 */
 387         s->timing[2] = val;
 388         break;
 389     case 3: /* LCDTiming3 */
 390         s->timing[3] = val;
 391         break;
 392     case 4: /* LCDUPBASE */
 393         s->upbase = val;
 394         break;
 395     case 5: /* LCDLPBASE */
 396         s->lpbase = val;
 397         break;
 398     case 6: /* LCDIMSC */
 399         if (s->version != PL110) {
 400             goto control;
 401         }
 402     imsc:
 403         s->int_mask = val;
 404         pl110_update(s);
 405         break;
 406     case 7: /* LCDControl */
 407         if (s->version != PL110) {
 408             goto imsc;
 409         }
 410     control:
 411         s->cr = val;
 412         s->bpp = (val >> 1) & 7;
 413         if (pl110_enabled(s)) {
 414             qemu_console_resize(s->con, s->cols, s->rows);
 415         }
 416         break;
 417     case 10: /* LCDICR */
 418         s->int_status &= ~val;
 419         pl110_update(s);
 420         break;
 421     default:
 422         qemu_log_mask(LOG_GUEST_ERROR,
 423                       "pl110_write: Bad offset %x\n", (int)offset);
 424     }
 425 }
 426
 427 static const MemoryRegionOps pl110_ops = {
 428     .read = pl110_read,
 429     .write = pl110_write,
 430     .endianness = DEVICE_NATIVE_ENDIAN,
 431 };
 432
 433 static void pl110_mux_ctrl_set(void *opaque, int line, int level)
 434 {
 435     pl110_state *s = (pl110_state *)opaque;
 436     s->mux_ctrl = level;
 437 }
 438
 439 static int vmstate_pl110_post_load(void *opaque, int version_id)
 440 {
 441     pl110_state *s = opaque;
 442     /* Make sure we redraw, and at the right size */
 443     pl110_invalidate_display(s);
 444     return 0;
 445 }
 446
 447 static int pl110_init(SysBusDevice *dev)
 448 {
 449     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 450
 451     memory_region_init_io(&s->iomem, &pl110_ops, s, "pl110", 0x1000);
 452     sysbus_init_mmio(dev, &s->iomem);
 453     sysbus_init_irq(dev, &s->irq);
 454     qdev_init_gpio_in(&s->busdev.qdev, pl110_mux_ctrl_set, 1);
 455     s->con = graphic_console_init(pl110_update_display,
 456                                   pl110_invalidate_display,
 457                                   NULL, NULL, s);
 458     return 0;
 459 }
 460
 461 static int pl110_versatile_init(SysBusDevice *dev)
 462 {
 463     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 464     s->version = PL110_VERSATILE;
 465     return pl110_init(dev);
 466 }
 467
 468 static int pl111_init(SysBusDevice *dev)
 469 {
 470     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 471     s->version = PL111;
 472     return pl110_init(dev);
 473 }
 474
 475 static void pl110_class_init(ObjectClass *klass, void *data)
 476 {
 477     DeviceClass *dc = DEVICE_CLASS(klass);
 478     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 479
 480     k->init = pl110_init;
 481     dc->no_user = 1;
 482     dc->vmsd = &vmstate_pl110;
 483 }
 484
 485 static const TypeInfo pl110_info = {
 486     .name          = "pl110",
 487     .parent        = TYPE_SYS_BUS_DEVICE,
 488     .instance_size = sizeof(pl110_state),
 489     .class_init    = pl110_class_init,
 490 };
 491
 492 static void pl110_versatile_class_init(ObjectClass *klass, void *data)
 493 {
 494     DeviceClass *dc = DEVICE_CLASS(klass);
 495     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 496
 497     k->init = pl110_versatile_init;
 498     dc->no_user = 1;
 499     dc->vmsd = &vmstate_pl110;
 500 }
 501
 502 static const TypeInfo pl110_versatile_info = {
 503     .name          = "pl110_versatile",
 504     .parent        = TYPE_SYS_BUS_DEVICE,
 505     .instance_size = sizeof(pl110_state),
 506     .class_init    = pl110_versatile_class_init,
 507 };
 508
 509 static void pl111_class_init(ObjectClass *klass, void *data)
 510 {
 511     DeviceClass *dc = DEVICE_CLASS(klass);
 512     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 513
 514     k->init = pl111_init;
 515     dc->no_user = 1;
 516     dc->vmsd = &vmstate_pl110;
 517 }
 518
 519 static const TypeInfo pl111_info = {
 520     .name          = "pl111",
 521     .parent        = TYPE_SYS_BUS_DEVICE,
 522     .instance_size = sizeof(pl110_state),
 523     .class_init    = pl111_class_init,
 524 };
 525
 526 static void pl110_register_types(void)
 527 {
 528     type_register_static(&pl110_info);
 529     type_register_static(&pl110_versatile_info);
 530     type_register_static(&pl111_info);
 531 }
 532
 533 type_init(pl110_register_types)