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 "sysbus.h"
  11 #include "console.h"
  12 #include "framebuffer.h"
  13
  14 #define PL110_CR_EN   0x001
  15 #define PL110_CR_BGR  0x100
  16 #define PL110_CR_BEBO 0x200
  17 #define PL110_CR_BEPO 0x400
  18 #define PL110_CR_PWR  0x800
  19
  20 enum pl110_bppmode
  21 {
  22     BPP_1,
  23     BPP_2,
  24     BPP_4,
  25     BPP_8,
  26     BPP_16,
  27     BPP_32,
  28     BPP_16_565, /* PL111 only */
  29     BPP_12      /* PL111 only */
  30 };
  31
  32
  33 /* The Versatile/PB uses a slightly modified PL110 controller.  */
  34 enum pl110_version
  35 {
  36     PL110,
  37     PL110_VERSATILE,
  38     PL111
  39 };
  40
  41 typedef struct {
  42     SysBusDevice busdev;
  43     MemoryRegion iomem;
  44     DisplayState *ds;
  45
  46     int version;
  47     uint32_t timing[4];
  48     uint32_t cr;
  49     uint32_t upbase;
  50     uint32_t lpbase;
  51     uint32_t int_status;
  52     uint32_t int_mask;
  53     int cols;
  54     int rows;
  55     enum pl110_bppmode bpp;
  56     int invalidate;
  57     uint32_t mux_ctrl;
  58     uint32_t pallette[256];
  59     uint32_t raw_pallette[128];
  60     qemu_irq irq;
  61 } pl110_state;
  62
  63 static int vmstate_pl110_post_load(void *opaque, int version_id);
  64
  65 static const VMStateDescription vmstate_pl110 = {
  66     .name = "pl110",
  67     .version_id = 2,
  68     .minimum_version_id = 1,
  69     .post_load = vmstate_pl110_post_load,
  70     .fields = (VMStateField[]) {
  71         VMSTATE_INT32(version, pl110_state),
  72         VMSTATE_UINT32_ARRAY(timing, pl110_state, 4),
  73         VMSTATE_UINT32(cr, pl110_state),
  74         VMSTATE_UINT32(upbase, pl110_state),
  75         VMSTATE_UINT32(lpbase, pl110_state),
  76         VMSTATE_UINT32(int_status, pl110_state),
  77         VMSTATE_UINT32(int_mask, pl110_state),
  78         VMSTATE_INT32(cols, pl110_state),
  79         VMSTATE_INT32(rows, pl110_state),
  80         VMSTATE_UINT32(bpp, pl110_state),
  81         VMSTATE_INT32(invalidate, pl110_state),
  82         VMSTATE_UINT32_ARRAY(pallette, pl110_state, 256),
  83         VMSTATE_UINT32_ARRAY(raw_pallette, pl110_state, 128),
  84         VMSTATE_UINT32_V(mux_ctrl, pl110_state, 2),
  85         VMSTATE_END_OF_LIST()
  86     }
  87 };
  88
  89 static const unsigned char pl110_id[] =
  90 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  91
  92 /* The Arm documentation (DDI0224C) says the CLDC on the Versatile board
  93    has a different ID.  However Linux only looks for the normal ID.  */
  94 #if 0
  95 static const unsigned char pl110_versatile_id[] =
  96 { 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  97 #else
  98 #define pl110_versatile_id pl110_id
  99 #endif
 100
 101 static const unsigned char pl111_id[] = {
 102     0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
 103 };
 104
 105 /* Indexed by pl110_version */
 106 static const unsigned char *idregs[] = {
 107     pl110_id,
 108     pl110_versatile_id,
 109     pl111_id
 110 };
 111
 112 #include "pixel_ops.h"
 113
 114 #define BITS 8
 115 #include "pl110_template.h"
 116 #define BITS 15
 117 #include "pl110_template.h"
 118 #define BITS 16
 119 #include "pl110_template.h"
 120 #define BITS 24
 121 #include "pl110_template.h"
 122 #define BITS 32
 123 #include "pl110_template.h"
 124
 125 static int pl110_enabled(pl110_state *s)
 126 {
 127   return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
 128 }
 129
 130 static void pl110_update_display(void *opaque)
 131 {
 132     pl110_state *s = (pl110_state *)opaque;
 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 (ds_get_bits_per_pixel(s->ds)) {
 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(s->ds, sysbus_address_space(&s->busdev),
 236                                s->upbase, s->cols, s->rows,
 237                                src_width, dest_width, 0,
 238                                s->invalidate,
 239                                fn, s->pallette,
 240                                &first, &last);
 241     if (first >= 0) {
 242         dpy_update(s->ds, 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->ds, s->cols, s->rows);
 253     }
 254 }
 255
 256 static void pl110_update_pallette(pl110_state *s, int n)
 257 {
 258     int i;
 259     uint32_t raw;
 260     unsigned int r, g, b;
 261
 262     raw = s->raw_pallette[n];
 263     n <<= 1;
 264     for (i = 0; i < 2; i++) {
 265         r = (raw & 0x1f) << 3;
 266         raw >>= 5;
 267         g = (raw & 0x1f) << 3;
 268         raw >>= 5;
 269         b = (raw & 0x1f) << 3;
 270         /* The I bit is ignored.  */
 271         raw >>= 6;
 272         switch (ds_get_bits_per_pixel(s->ds)) {
 273         case 8:
 274             s->pallette[n] = rgb_to_pixel8(r, g, b);
 275             break;
 276         case 15:
 277             s->pallette[n] = rgb_to_pixel15(r, g, b);
 278             break;
 279         case 16:
 280             s->pallette[n] = rgb_to_pixel16(r, g, b);
 281             break;
 282         case 24:
 283         case 32:
 284             s->pallette[n] = rgb_to_pixel32(r, g, b);
 285             break;
 286         }
 287         n++;
 288     }
 289 }
 290
 291 static void pl110_resize(pl110_state *s, int width, int height)
 292 {
 293     if (width != s->cols || height != s->rows) {
 294         if (pl110_enabled(s)) {
 295             qemu_console_resize(s->ds, width, height);
 296         }
 297     }
 298     s->cols = width;
 299     s->rows = height;
 300 }
 301
 302 /* Update interrupts.  */
 303 static void pl110_update(pl110_state *s)
 304 {
 305   /* TODO: Implement interrupts.  */
 306 }
 307
 308 static uint64_t pl110_read(void *opaque, target_phys_addr_t offset,
 309                            unsigned size)
 310 {
 311     pl110_state *s = (pl110_state *)opaque;
 312
 313     if (offset >= 0xfe0 && offset < 0x1000) {
 314         return idregs[s->version][(offset - 0xfe0) >> 2];
 315     }
 316     if (offset >= 0x200 && offset < 0x400) {
 317         return s->raw_pallette[(offset - 0x200) >> 2];
 318     }
 319     switch (offset >> 2) {
 320     case 0: /* LCDTiming0 */
 321         return s->timing[0];
 322     case 1: /* LCDTiming1 */
 323         return s->timing[1];
 324     case 2: /* LCDTiming2 */
 325         return s->timing[2];
 326     case 3: /* LCDTiming3 */
 327         return s->timing[3];
 328     case 4: /* LCDUPBASE */
 329         return s->upbase;
 330     case 5: /* LCDLPBASE */
 331         return s->lpbase;
 332     case 6: /* LCDIMSC */
 333         if (s->version != PL110) {
 334             return s->cr;
 335         }
 336         return s->int_mask;
 337     case 7: /* LCDControl */
 338         if (s->version != PL110) {
 339             return s->int_mask;
 340         }
 341         return s->cr;
 342     case 8: /* LCDRIS */
 343         return s->int_status;
 344     case 9: /* LCDMIS */
 345         return s->int_status & s->int_mask;
 346     case 11: /* LCDUPCURR */
 347         /* TODO: Implement vertical refresh.  */
 348         return s->upbase;
 349     case 12: /* LCDLPCURR */
 350         return s->lpbase;
 351     default:
 352         hw_error("pl110_read: Bad offset %x\n", (int)offset);
 353         return 0;
 354     }
 355 }
 356
 357 static void pl110_write(void *opaque, target_phys_addr_t offset,
 358                         uint64_t val, unsigned size)
 359 {
 360     pl110_state *s = (pl110_state *)opaque;
 361     int n;
 362
 363     /* For simplicity invalidate the display whenever a control register
 364        is written to.  */
 365     s->invalidate = 1;
 366     if (offset >= 0x200 && offset < 0x400) {
 367         /* Pallette.  */
 368         n = (offset - 0x200) >> 2;
 369         s->raw_pallette[(offset - 0x200) >> 2] = val;
 370         pl110_update_pallette(s, n);
 371         return;
 372     }
 373     switch (offset >> 2) {
 374     case 0: /* LCDTiming0 */
 375         s->timing[0] = val;
 376         n = ((val & 0xfc) + 4) * 4;
 377         pl110_resize(s, n, s->rows);
 378         break;
 379     case 1: /* LCDTiming1 */
 380         s->timing[1] = val;
 381         n = (val & 0x3ff) + 1;
 382         pl110_resize(s, s->cols, n);
 383         break;
 384     case 2: /* LCDTiming2 */
 385         s->timing[2] = val;
 386         break;
 387     case 3: /* LCDTiming3 */
 388         s->timing[3] = val;
 389         break;
 390     case 4: /* LCDUPBASE */
 391         s->upbase = val;
 392         break;
 393     case 5: /* LCDLPBASE */
 394         s->lpbase = val;
 395         break;
 396     case 6: /* LCDIMSC */
 397         if (s->version != PL110) {
 398             goto control;
 399         }
 400     imsc:
 401         s->int_mask = val;
 402         pl110_update(s);
 403         break;
 404     case 7: /* LCDControl */
 405         if (s->version != PL110) {
 406             goto imsc;
 407         }
 408     control:
 409         s->cr = val;
 410         s->bpp = (val >> 1) & 7;
 411         if (pl110_enabled(s)) {
 412             qemu_console_resize(s->ds, s->cols, s->rows);
 413         }
 414         break;
 415     case 10: /* LCDICR */
 416         s->int_status &= ~val;
 417         pl110_update(s);
 418         break;
 419     default:
 420         hw_error("pl110_write: Bad offset %x\n", (int)offset);
 421     }
 422 }
 423
 424 static const MemoryRegionOps pl110_ops = {
 425     .read = pl110_read,
 426     .write = pl110_write,
 427     .endianness = DEVICE_NATIVE_ENDIAN,
 428 };
 429
 430 static void pl110_mux_ctrl_set(void *opaque, int line, int level)
 431 {
 432     pl110_state *s = (pl110_state *)opaque;
 433     s->mux_ctrl = level;
 434 }
 435
 436 static int vmstate_pl110_post_load(void *opaque, int version_id)
 437 {
 438     pl110_state *s = opaque;
 439     /* Make sure we redraw, and at the right size */
 440     pl110_invalidate_display(s);
 441     return 0;
 442 }
 443
 444 static int pl110_init(SysBusDevice *dev)
 445 {
 446     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 447
 448     memory_region_init_io(&s->iomem, &pl110_ops, s, "pl110", 0x1000);
 449     sysbus_init_mmio(dev, &s->iomem);
 450     sysbus_init_irq(dev, &s->irq);
 451     qdev_init_gpio_in(&s->busdev.qdev, pl110_mux_ctrl_set, 1);
 452     s->ds = graphic_console_init(pl110_update_display,
 453                                  pl110_invalidate_display,
 454                                  NULL, NULL, s);
 455     return 0;
 456 }
 457
 458 static int pl110_versatile_init(SysBusDevice *dev)
 459 {
 460     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 461     s->version = PL110_VERSATILE;
 462     return pl110_init(dev);
 463 }
 464
 465 static int pl111_init(SysBusDevice *dev)
 466 {
 467     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 468     s->version = PL111;
 469     return pl110_init(dev);
 470 }
 471
 472 static SysBusDeviceInfo pl110_info = {
 473     .init = pl110_init,
 474     .qdev.name = "pl110",
 475     .qdev.size = sizeof(pl110_state),
 476     .qdev.vmsd = &vmstate_pl110,
 477     .qdev.no_user = 1,
 478 };
 479
 480 static SysBusDeviceInfo pl110_versatile_info = {
 481     .init = pl110_versatile_init,
 482     .qdev.name = "pl110_versatile",
 483     .qdev.size = sizeof(pl110_state),
 484     .qdev.vmsd = &vmstate_pl110,
 485     .qdev.no_user = 1,
 486 };
 487
 488 static SysBusDeviceInfo pl111_info = {
 489     .init = pl111_init,
 490     .qdev.name = "pl111",
 491     .qdev.size = sizeof(pl110_state),
 492     .qdev.vmsd = &vmstate_pl110,
 493     .qdev.no_user = 1,
 494 };
 495
 496 static void pl110_register_devices(void)
 497 {
 498     sysbus_register_withprop(&pl110_info);
 499     sysbus_register_withprop(&pl110_versatile_info);
 500     sysbus_register_withprop(&pl111_info);
 501 }
 502
 503 device_init(pl110_register_devices)