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 "qemu/osdep.h" 11 #include "hw/irq.h" 12 #include "hw/sysbus.h" 13 #include "migration/vmstate.h" 14 #include "ui/console.h" 15 #include "framebuffer.h" 16 #include "ui/pixel_ops.h" 17 #include "qemu/timer.h" 18 #include "qemu/log.h" 19 #include "qemu/module.h" 20 #include "qom/object.h" 21 22 #define PL110_CR_EN 0x001 23 #define PL110_CR_BGR 0x100 24 #define PL110_CR_BEBO 0x200 25 #define PL110_CR_BEPO 0x400 26 #define PL110_CR_PWR 0x800 27 #define PL110_IE_NB 0x004 28 #define PL110_IE_VC 0x008 29 30 enum pl110_bppmode 31 { 32 BPP_1, 33 BPP_2, 34 BPP_4, 35 BPP_8, 36 BPP_16, 37 BPP_32, 38 BPP_16_565, /* PL111 only */ 39 BPP_12 /* PL111 only */ 40 }; 41 42 43 /* The Versatile/PB uses a slightly modified PL110 controller. */ 44 enum pl110_version 45 { 46 VERSION_PL110, 47 VERSION_PL110_VERSATILE, 48 VERSION_PL111 49 }; 50 51 #define TYPE_PL110 "pl110" 52 OBJECT_DECLARE_SIMPLE_TYPE(PL110State, PL110) 53 54 struct PL110State { 55 SysBusDevice parent_obj; 56 57 MemoryRegion iomem; 58 MemoryRegionSection fbsection; 59 QemuConsole *con; 60 QEMUTimer *vblank_timer; 61 62 int version; 63 uint32_t timing[4]; 64 uint32_t cr; 65 uint32_t upbase; 66 uint32_t lpbase; 67 uint32_t int_status; 68 uint32_t int_mask; 69 int cols; 70 int rows; 71 enum pl110_bppmode bpp; 72 int invalidate; 73 uint32_t mux_ctrl; 74 uint32_t palette[256]; 75 uint32_t raw_palette[128]; 76 qemu_irq irq; 77 }; 78 79 static int vmstate_pl110_post_load(void *opaque, int version_id); 80 81 static const VMStateDescription vmstate_pl110 = { 82 .name = "pl110", 83 .version_id = 2, 84 .minimum_version_id = 1, 85 .post_load = vmstate_pl110_post_load, 86 .fields = (VMStateField[]) { 87 VMSTATE_INT32(version, PL110State), 88 VMSTATE_UINT32_ARRAY(timing, PL110State, 4), 89 VMSTATE_UINT32(cr, PL110State), 90 VMSTATE_UINT32(upbase, PL110State), 91 VMSTATE_UINT32(lpbase, PL110State), 92 VMSTATE_UINT32(int_status, PL110State), 93 VMSTATE_UINT32(int_mask, PL110State), 94 VMSTATE_INT32(cols, PL110State), 95 VMSTATE_INT32(rows, PL110State), 96 VMSTATE_UINT32(bpp, PL110State), 97 VMSTATE_INT32(invalidate, PL110State), 98 VMSTATE_UINT32_ARRAY(palette, PL110State, 256), 99 VMSTATE_UINT32_ARRAY(raw_palette, PL110State, 128), 100 VMSTATE_UINT32_V(mux_ctrl, PL110State, 2), 101 VMSTATE_END_OF_LIST() 102 } 103 }; 104 105 static const unsigned char pl110_id[] = 106 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; 107 108 static const unsigned char pl111_id[] = { 109 0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1 110 }; 111 112 113 /* Indexed by pl110_version */ 114 static const unsigned char *idregs[] = { 115 pl110_id, 116 /* The ARM documentation (DDI0224C) says the CLCDC on the Versatile board 117 * has a different ID (0x93, 0x10, 0x04, 0x00, ...). However the hardware 118 * itself has the same ID values as a stock PL110, and guests (in 119 * particular Linux) rely on this. We emulate what the hardware does, 120 * rather than what the docs claim it ought to do. 121 */ 122 pl110_id, 123 pl111_id 124 }; 125 126 #define COPY_PIXEL(to, from) do { *(uint32_t *)to = from; to += 4; } while (0) 127 128 #undef RGB 129 #define BORDER bgr 130 #define ORDER 0 131 #include "pl110_template.h" 132 #define ORDER 1 133 #include "pl110_template.h" 134 #define ORDER 2 135 #include "pl110_template.h" 136 #undef BORDER 137 #define RGB 138 #define BORDER rgb 139 #define ORDER 0 140 #include "pl110_template.h" 141 #define ORDER 1 142 #include "pl110_template.h" 143 #define ORDER 2 144 #include "pl110_template.h" 145 #undef BORDER 146 147 #undef COPY_PIXEL 148 149 static drawfn pl110_draw_fn_32[48] = { 150 pl110_draw_line1_lblp_bgr, 151 pl110_draw_line2_lblp_bgr, 152 pl110_draw_line4_lblp_bgr, 153 pl110_draw_line8_lblp_bgr, 154 pl110_draw_line16_555_lblp_bgr, 155 pl110_draw_line32_lblp_bgr, 156 pl110_draw_line16_lblp_bgr, 157 pl110_draw_line12_lblp_bgr, 158 159 pl110_draw_line1_bbbp_bgr, 160 pl110_draw_line2_bbbp_bgr, 161 pl110_draw_line4_bbbp_bgr, 162 pl110_draw_line8_bbbp_bgr, 163 pl110_draw_line16_555_bbbp_bgr, 164 pl110_draw_line32_bbbp_bgr, 165 pl110_draw_line16_bbbp_bgr, 166 pl110_draw_line12_bbbp_bgr, 167 168 pl110_draw_line1_lbbp_bgr, 169 pl110_draw_line2_lbbp_bgr, 170 pl110_draw_line4_lbbp_bgr, 171 pl110_draw_line8_lbbp_bgr, 172 pl110_draw_line16_555_lbbp_bgr, 173 pl110_draw_line32_lbbp_bgr, 174 pl110_draw_line16_lbbp_bgr, 175 pl110_draw_line12_lbbp_bgr, 176 177 pl110_draw_line1_lblp_rgb, 178 pl110_draw_line2_lblp_rgb, 179 pl110_draw_line4_lblp_rgb, 180 pl110_draw_line8_lblp_rgb, 181 pl110_draw_line16_555_lblp_rgb, 182 pl110_draw_line32_lblp_rgb, 183 pl110_draw_line16_lblp_rgb, 184 pl110_draw_line12_lblp_rgb, 185 186 pl110_draw_line1_bbbp_rgb, 187 pl110_draw_line2_bbbp_rgb, 188 pl110_draw_line4_bbbp_rgb, 189 pl110_draw_line8_bbbp_rgb, 190 pl110_draw_line16_555_bbbp_rgb, 191 pl110_draw_line32_bbbp_rgb, 192 pl110_draw_line16_bbbp_rgb, 193 pl110_draw_line12_bbbp_rgb, 194 195 pl110_draw_line1_lbbp_rgb, 196 pl110_draw_line2_lbbp_rgb, 197 pl110_draw_line4_lbbp_rgb, 198 pl110_draw_line8_lbbp_rgb, 199 pl110_draw_line16_555_lbbp_rgb, 200 pl110_draw_line32_lbbp_rgb, 201 pl110_draw_line16_lbbp_rgb, 202 pl110_draw_line12_lbbp_rgb, 203 }; 204 205 static int pl110_enabled(PL110State *s) 206 { 207 return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR); 208 } 209 210 static void pl110_update_display(void *opaque) 211 { 212 PL110State *s = (PL110State *)opaque; 213 SysBusDevice *sbd; 214 DisplaySurface *surface = qemu_console_surface(s->con); 215 drawfn fn; 216 int src_width; 217 int bpp_offset; 218 int first; 219 int last; 220 221 if (!pl110_enabled(s)) { 222 return; 223 } 224 225 sbd = SYS_BUS_DEVICE(s); 226 227 if (s->cr & PL110_CR_BGR) 228 bpp_offset = 0; 229 else 230 bpp_offset = 24; 231 232 if ((s->version != VERSION_PL111) && (s->bpp == BPP_16)) { 233 /* The PL110's native 16 bit mode is 5551; however 234 * most boards with a PL110 implement an external 235 * mux which allows bits to be reshuffled to give 236 * 565 format. The mux is typically controlled by 237 * an external system register. 238 * This is controlled by a GPIO input pin 239 * so boards can wire it up to their register. 240 * 241 * The PL111 straightforwardly implements both 242 * 5551 and 565 under control of the bpp field 243 * in the LCDControl register. 244 */ 245 switch (s->mux_ctrl) { 246 case 3: /* 565 BGR */ 247 bpp_offset = (BPP_16_565 - BPP_16); 248 break; 249 case 1: /* 5551 */ 250 break; 251 case 0: /* 888; also if we have loaded vmstate from an old version */ 252 case 2: /* 565 RGB */ 253 default: 254 /* treat as 565 but honour BGR bit */ 255 bpp_offset += (BPP_16_565 - BPP_16); 256 break; 257 } 258 } 259 260 if (s->cr & PL110_CR_BEBO) { 261 fn = pl110_draw_fn_32[s->bpp + 8 + bpp_offset]; 262 } else if (s->cr & PL110_CR_BEPO) { 263 fn = pl110_draw_fn_32[s->bpp + 16 + bpp_offset]; 264 } else { 265 fn = pl110_draw_fn_32[s->bpp + bpp_offset]; 266 } 267 268 src_width = s->cols; 269 switch (s->bpp) { 270 case BPP_1: 271 src_width >>= 3; 272 break; 273 case BPP_2: 274 src_width >>= 2; 275 break; 276 case BPP_4: 277 src_width >>= 1; 278 break; 279 case BPP_8: 280 break; 281 case BPP_16: 282 case BPP_16_565: 283 case BPP_12: 284 src_width <<= 1; 285 break; 286 case BPP_32: 287 src_width <<= 2; 288 break; 289 } 290 first = 0; 291 if (s->invalidate) { 292 framebuffer_update_memory_section(&s->fbsection, 293 sysbus_address_space(sbd), 294 s->upbase, 295 s->rows, src_width); 296 } 297 298 framebuffer_update_display(surface, &s->fbsection, 299 s->cols, s->rows, 300 src_width, s->cols * 4, 0, 301 s->invalidate, 302 fn, s->palette, 303 &first, &last); 304 305 if (first >= 0) { 306 dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1); 307 } 308 s->invalidate = 0; 309 } 310 311 static void pl110_invalidate_display(void * opaque) 312 { 313 PL110State *s = (PL110State *)opaque; 314 s->invalidate = 1; 315 if (pl110_enabled(s)) { 316 qemu_console_resize(s->con, s->cols, s->rows); 317 } 318 } 319 320 static void pl110_update_palette(PL110State *s, int n) 321 { 322 DisplaySurface *surface = qemu_console_surface(s->con); 323 int i; 324 uint32_t raw; 325 unsigned int r, g, b; 326 327 raw = s->raw_palette[n]; 328 n <<= 1; 329 for (i = 0; i < 2; i++) { 330 r = (raw & 0x1f) << 3; 331 raw >>= 5; 332 g = (raw & 0x1f) << 3; 333 raw >>= 5; 334 b = (raw & 0x1f) << 3; 335 /* The I bit is ignored. */ 336 raw >>= 6; 337 switch (surface_bits_per_pixel(surface)) { 338 case 8: 339 s->palette[n] = rgb_to_pixel8(r, g, b); 340 break; 341 case 15: 342 s->palette[n] = rgb_to_pixel15(r, g, b); 343 break; 344 case 16: 345 s->palette[n] = rgb_to_pixel16(r, g, b); 346 break; 347 case 24: 348 case 32: 349 s->palette[n] = rgb_to_pixel32(r, g, b); 350 break; 351 } 352 n++; 353 } 354 } 355 356 static void pl110_resize(PL110State *s, int width, int height) 357 { 358 if (width != s->cols || height != s->rows) { 359 if (pl110_enabled(s)) { 360 qemu_console_resize(s->con, width, height); 361 } 362 } 363 s->cols = width; 364 s->rows = height; 365 } 366 367 /* Update interrupts. */ 368 static void pl110_update(PL110State *s) 369 { 370 /* Raise IRQ if enabled and any status bit is 1 */ 371 if (s->int_status & s->int_mask) { 372 qemu_irq_raise(s->irq); 373 } else { 374 qemu_irq_lower(s->irq); 375 } 376 } 377 378 static void pl110_vblank_interrupt(void *opaque) 379 { 380 PL110State *s = opaque; 381 382 /* Fire the vertical compare and next base IRQs and re-arm */ 383 s->int_status |= (PL110_IE_NB | PL110_IE_VC); 384 timer_mod(s->vblank_timer, 385 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 386 NANOSECONDS_PER_SECOND / 60); 387 pl110_update(s); 388 } 389 390 static uint64_t pl110_read(void *opaque, hwaddr offset, 391 unsigned size) 392 { 393 PL110State *s = (PL110State *)opaque; 394 395 if (offset >= 0xfe0 && offset < 0x1000) { 396 return idregs[s->version][(offset - 0xfe0) >> 2]; 397 } 398 if (offset >= 0x200 && offset < 0x400) { 399 return s->raw_palette[(offset - 0x200) >> 2]; 400 } 401 switch (offset >> 2) { 402 case 0: /* LCDTiming0 */ 403 return s->timing[0]; 404 case 1: /* LCDTiming1 */ 405 return s->timing[1]; 406 case 2: /* LCDTiming2 */ 407 return s->timing[2]; 408 case 3: /* LCDTiming3 */ 409 return s->timing[3]; 410 case 4: /* LCDUPBASE */ 411 return s->upbase; 412 case 5: /* LCDLPBASE */ 413 return s->lpbase; 414 case 6: /* LCDIMSC */ 415 if (s->version != VERSION_PL110) { 416 return s->cr; 417 } 418 return s->int_mask; 419 case 7: /* LCDControl */ 420 if (s->version != VERSION_PL110) { 421 return s->int_mask; 422 } 423 return s->cr; 424 case 8: /* LCDRIS */ 425 return s->int_status; 426 case 9: /* LCDMIS */ 427 return s->int_status & s->int_mask; 428 case 11: /* LCDUPCURR */ 429 /* TODO: Implement vertical refresh. */ 430 return s->upbase; 431 case 12: /* LCDLPCURR */ 432 return s->lpbase; 433 default: 434 qemu_log_mask(LOG_GUEST_ERROR, 435 "pl110_read: Bad offset %x\n", (int)offset); 436 return 0; 437 } 438 } 439 440 static void pl110_write(void *opaque, hwaddr offset, 441 uint64_t val, unsigned size) 442 { 443 PL110State *s = (PL110State *)opaque; 444 int n; 445 446 /* For simplicity invalidate the display whenever a control register 447 is written to. */ 448 s->invalidate = 1; 449 if (offset >= 0x200 && offset < 0x400) { 450 /* Palette. */ 451 n = (offset - 0x200) >> 2; 452 s->raw_palette[(offset - 0x200) >> 2] = val; 453 pl110_update_palette(s, n); 454 return; 455 } 456 switch (offset >> 2) { 457 case 0: /* LCDTiming0 */ 458 s->timing[0] = val; 459 n = ((val & 0xfc) + 4) * 4; 460 pl110_resize(s, n, s->rows); 461 break; 462 case 1: /* LCDTiming1 */ 463 s->timing[1] = val; 464 n = (val & 0x3ff) + 1; 465 pl110_resize(s, s->cols, n); 466 break; 467 case 2: /* LCDTiming2 */ 468 s->timing[2] = val; 469 break; 470 case 3: /* LCDTiming3 */ 471 s->timing[3] = val; 472 break; 473 case 4: /* LCDUPBASE */ 474 s->upbase = val; 475 break; 476 case 5: /* LCDLPBASE */ 477 s->lpbase = val; 478 break; 479 case 6: /* LCDIMSC */ 480 if (s->version != VERSION_PL110) { 481 goto control; 482 } 483 imsc: 484 s->int_mask = val; 485 pl110_update(s); 486 break; 487 case 7: /* LCDControl */ 488 if (s->version != VERSION_PL110) { 489 goto imsc; 490 } 491 control: 492 s->cr = val; 493 s->bpp = (val >> 1) & 7; 494 if (pl110_enabled(s)) { 495 qemu_console_resize(s->con, s->cols, s->rows); 496 timer_mod(s->vblank_timer, 497 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 498 NANOSECONDS_PER_SECOND / 60); 499 } else { 500 timer_del(s->vblank_timer); 501 } 502 break; 503 case 10: /* LCDICR */ 504 s->int_status &= ~val; 505 pl110_update(s); 506 break; 507 default: 508 qemu_log_mask(LOG_GUEST_ERROR, 509 "pl110_write: Bad offset %x\n", (int)offset); 510 } 511 } 512 513 static const MemoryRegionOps pl110_ops = { 514 .read = pl110_read, 515 .write = pl110_write, 516 .endianness = DEVICE_NATIVE_ENDIAN, 517 }; 518 519 static void pl110_mux_ctrl_set(void *opaque, int line, int level) 520 { 521 PL110State *s = (PL110State *)opaque; 522 s->mux_ctrl = level; 523 } 524 525 static int vmstate_pl110_post_load(void *opaque, int version_id) 526 { 527 PL110State *s = opaque; 528 /* Make sure we redraw, and at the right size */ 529 pl110_invalidate_display(s); 530 return 0; 531 } 532 533 static const GraphicHwOps pl110_gfx_ops = { 534 .invalidate = pl110_invalidate_display, 535 .gfx_update = pl110_update_display, 536 }; 537 538 static void pl110_realize(DeviceState *dev, Error **errp) 539 { 540 PL110State *s = PL110(dev); 541 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 542 543 memory_region_init_io(&s->iomem, OBJECT(s), &pl110_ops, s, "pl110", 0x1000); 544 sysbus_init_mmio(sbd, &s->iomem); 545 sysbus_init_irq(sbd, &s->irq); 546 s->vblank_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 547 pl110_vblank_interrupt, s); 548 qdev_init_gpio_in(dev, pl110_mux_ctrl_set, 1); 549 s->con = graphic_console_init(dev, 0, &pl110_gfx_ops, s); 550 } 551 552 static void pl110_init(Object *obj) 553 { 554 PL110State *s = PL110(obj); 555 556 s->version = VERSION_PL110; 557 } 558 559 static void pl110_versatile_init(Object *obj) 560 { 561 PL110State *s = PL110(obj); 562 563 s->version = VERSION_PL110_VERSATILE; 564 } 565 566 static void pl111_init(Object *obj) 567 { 568 PL110State *s = PL110(obj); 569 570 s->version = VERSION_PL111; 571 } 572 573 static void pl110_class_init(ObjectClass *klass, void *data) 574 { 575 DeviceClass *dc = DEVICE_CLASS(klass); 576 577 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 578 dc->vmsd = &vmstate_pl110; 579 dc->realize = pl110_realize; 580 } 581 582 static const TypeInfo pl110_info = { 583 .name = TYPE_PL110, 584 .parent = TYPE_SYS_BUS_DEVICE, 585 .instance_size = sizeof(PL110State), 586 .instance_init = pl110_init, 587 .class_init = pl110_class_init, 588 }; 589 590 static const TypeInfo pl110_versatile_info = { 591 .name = "pl110_versatile", 592 .parent = TYPE_PL110, 593 .instance_init = pl110_versatile_init, 594 }; 595 596 static const TypeInfo pl111_info = { 597 .name = "pl111", 598 .parent = TYPE_PL110, 599 .instance_init = pl111_init, 600 }; 601 602 static void pl110_register_types(void) 603 { 604 type_register_static(&pl110_info); 605 type_register_static(&pl110_versatile_info); 606 type_register_static(&pl111_info); 607 } 608 609 type_init(pl110_register_types) 610