hw/pl110.c

   1 /*
   2  * Arm PrimeCell PL110 Color LCD Controller
   3  *
   4  * Copyright (c) 2005 CodeSourcery, LLC.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the GNU LGPL
   8  */
   9
  10 #include "vl.h"
  11
  12 #define PL110_CR_EN   0x001
  13 #define PL110_CR_BEBO 0x200
  14 #define PL110_CR_BEPO 0x400
  15 #define PL110_CR_PWR  0x800
  16
  17 enum pl110_bppmode
  18 {
  19     BPP_1,
  20     BPP_2,
  21     BPP_4,
  22     BPP_8,
  23     BPP_16,
  24     BPP_32
  25 };
  26
  27 typedef struct {
  28     uint32_t base;
  29     DisplayState *ds;
  30     void *pic;
  31     uint32_t timing[4];
  32     uint32_t cr;
  33     uint32_t upbase;
  34     uint32_t lpbase;
  35     uint32_t int_status;
  36     uint32_t int_mask;
  37     int cols;
  38     int rows;
  39     enum pl110_bppmode bpp;
  40     int invalidate;
  41     uint32_t pallette[256];
  42     uint32_t raw_pallette[128];
  43     int irq;
  44 } pl110_state;
  45
  46 static const unsigned char pl110_id[] =
  47 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  48
  49 static inline uint32_t rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b)
  50 {
  51     return ((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6);
  52 }
  53
  54 static inline uint32_t rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b)
  55 {
  56     return ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3);
  57 }
  58
  59 static inline uint32_t rgb_to_pixel16(unsigned int r, unsigned int g, unsigned b)
  60 {
  61     return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
  62 }
  63
  64 static inline uint32_t rgb_to_pixel24(unsigned int r, unsigned int g, unsigned b)
  65 {
  66     return (r << 16) | (g << 8) | b;
  67 }
  68
  69 static inline uint32_t rgb_to_pixel32(unsigned int r, unsigned int g, unsigned b)
  70 {
  71     return (r << 16) | (g << 8) | b;
  72 }
  73
  74 typedef void (*drawfn)(uint32_t *, uint8_t *, const uint8_t *, int);
  75
  76 #define BITS 8
  77 #include "pl110_template.h"
  78 #define BITS 15
  79 #include "pl110_template.h"
  80 #define BITS 16
  81 #include "pl110_template.h"
  82 #define BITS 24
  83 #include "pl110_template.h"
  84 #define BITS 32
  85 #include "pl110_template.h"
  86
  87 static int pl110_enabled(pl110_state *s)
  88 {
  89   return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
  90 }
  91
  92 void pl110_update_display(void *opaque)
  93 {
  94     pl110_state *s = (pl110_state *)opaque;
  95     drawfn* fntable;
  96     drawfn fn;
  97     uint32_t *pallette;
  98     uint32_t addr;
  99     uint32_t base;
 100     int dest_width;
 101     int src_width;
 102     uint8_t *dest;
 103     uint8_t *src;
 104     int first, last;
 105     int dirty, new_dirty;
 106     int i;
 107
 108     if (!pl110_enabled(s))
 109         return;
 110
 111     switch (s->ds->depth) {
 112     case 0:
 113         return;
 114     case 8:
 115         fntable = pl110_draw_fn_8;
 116         dest_width = 1;
 117         break;
 118     case 15:
 119         fntable = pl110_draw_fn_15;
 120         dest_width = 2;
 121         break;
 122     case 16:
 123         fntable = pl110_draw_fn_16;
 124         dest_width = 2;
 125         break;
 126     case 24:
 127         fntable = pl110_draw_fn_24;
 128         dest_width = 3;
 129         break;
 130     case 32:
 131         fntable = pl110_draw_fn_32;
 132         dest_width = 4;
 133         break;
 134     default:
 135         fprintf(stderr, "pl110: Bad color depth\n");
 136         exit(1);
 137     }
 138     if (s->cr & PL110_CR_BEBO)
 139       fn = fntable[s->bpp + 6];
 140     else if (s->cr & PL110_CR_BEPO)
 141       fn = fntable[s->bpp + 12];
 142     else
 143       fn = fntable[s->bpp];
 144
 145     src_width = s->cols;
 146     switch (s->bpp) {
 147     case BPP_1:
 148         src_width >>= 3;
 149         break;
 150     case BPP_2:
 151         src_width >>= 2;
 152         break;
 153     case BPP_4:
 154         src_width >>= 1;
 155         break;
 156     case BPP_8:
 157         break;
 158     case BPP_16:
 159         src_width <<= 1;
 160         break;
 161     case BPP_32:
 162         src_width <<= 2;
 163         break;
 164     }
 165     dest_width *= s->cols;
 166     pallette = s->pallette;
 167     base = s->upbase;
 168     /* HACK: Arm aliases physical memory at 0x80000000.  */
 169     if (base > 0x80000000)
 170         base -= 0x80000000;
 171     src = phys_ram_base + base;
 172     dest = s->ds->data;
 173     first = -1;
 174     addr = base;
 175
 176     dirty = cpu_physical_memory_get_dirty(addr, VGA_DIRTY_FLAG);
 177     for (i = 0; i < s->rows; i++) {
 178         new_dirty = 0;
 179         if ((addr & TARGET_PAGE_MASK) + src_width >= TARGET_PAGE_SIZE) {
 180             uint32_t tmp;
 181             for (tmp = 0; tmp < src_width; tmp += TARGET_PAGE_SIZE) {
 182                 new_dirty |= cpu_physical_memory_get_dirty(addr + tmp,
 183                                                            VGA_DIRTY_FLAG);
 184             }
 185         }
 186
 187         if (dirty || new_dirty || s->invalidate) {
 188             fn(pallette, dest, src, s->cols);
 189             if (first == -1)
 190                 first = i;
 191             last = i;
 192         }
 193         dirty = new_dirty;
 194         addr += src_width;
 195         dest += dest_width;
 196         src += src_width;
 197     }
 198     if (first < 0)
 199       return;
 200
 201     s->invalidate = 0;
 202     cpu_physical_memory_reset_dirty(base + first * src_width,
 203                                     base + (last + 1) * src_width,
 204                                     VGA_DIRTY_FLAG);
 205     dpy_update(s->ds, 0, first, s->cols, last - first + 1);
 206 }
 207
 208 void pl110_invalidate_display(void * opaque)
 209 {
 210     pl110_state *s = (pl110_state *)opaque;
 211     s->invalidate = 1;
 212 }
 213
 214 static void pl110_update_pallette(pl110_state *s, int n)
 215 {
 216     int i;
 217     uint32_t raw;
 218     unsigned int r, g, b;
 219
 220     raw = s->raw_pallette[n];
 221     n <<= 1;
 222     for (i = 0; i < 2; i++) {
 223         r = (raw & 0x1f) << 3;
 224         raw >>= 5;
 225         g = (raw & 0x1f) << 3;
 226         raw >>= 5;
 227         b = (raw & 0x1f) << 3;
 228         /* The I bit is ignored.  */
 229         raw >>= 6;
 230         switch (s->ds->depth) {
 231         case 8:
 232             s->pallette[n] = rgb_to_pixel8(r, g, b);
 233             break;
 234         case 15:
 235             s->pallette[n] = rgb_to_pixel15(r, g, b);
 236             break;
 237         case 16:
 238             s->pallette[n] = rgb_to_pixel16(r, g, b);
 239             break;
 240         case 24:
 241         case 32:
 242             s->pallette[n] = rgb_to_pixel32(r, g, b);
 243             break;
 244         }
 245         n++;
 246     }
 247 }
 248
 249 static void pl110_resize(pl110_state *s, int width, int height)
 250 {
 251     if (width != s->cols || height != s->rows) {
 252         if (pl110_enabled(s)) {
 253             dpy_resize(s->ds, s->cols, s->rows);
 254         }
 255     }
 256     s->cols = width;
 257     s->rows = height;
 258 }
 259
 260 /* Update interrupts.  */
 261 static void pl110_update(pl110_state *s)
 262 {
 263   /* TODO: Implement interrupts.  */
 264 }
 265
 266 static uint32_t pl110_read(void *opaque, target_phys_addr_t offset)
 267 {
 268     pl110_state *s = (pl110_state *)opaque;
 269
 270     offset -= s->base;
 271     if (offset >= 0xfe0 && offset < 0x1000) {
 272         return pl110_id[(offset - 0xfe0) >> 2];
 273     }
 274     if (offset >= 0x200 && offset < 0x400) {
 275         return s->raw_pallette[(offset - 0x200) >> 2];
 276     }
 277     switch (offset >> 2) {
 278     case 0: /* LCDTiming0 */
 279         return s->timing[0];
 280     case 1: /* LCDTiming1 */
 281         return s->timing[1];
 282     case 2: /* LCDTiming2 */
 283         return s->timing[2];
 284     case 3: /* LCDTiming3 */
 285         return s->timing[3];
 286     case 4: /* LCDUPBASE */
 287         return s->upbase;
 288     case 5: /* LCDLPBASE */
 289         return s->lpbase;
 290     case 6: /* LCDIMSC */
 291         return s->int_mask;
 292     case 7: /* LCDControl */
 293         return s->cr;
 294     case 8: /* LCDRIS */
 295         return s->int_status;
 296     case 9: /* LCDMIS */
 297         return s->int_status & s->int_mask;
 298     case 11: /* LCDUPCURR */
 299         /* TODO: Implement vertical refresh.  */
 300         return s->upbase;
 301     case 12: /* LCDLPCURR */
 302         return s->lpbase;
 303     default:
 304         cpu_abort (cpu_single_env, "pl110_read: Bad offset %x\n", offset);
 305         return 0;
 306     }
 307 }
 308
 309 static void pl110_write(void *opaque, target_phys_addr_t offset,
 310                         uint32_t val)
 311 {
 312     pl110_state *s = (pl110_state *)opaque;
 313     int n;
 314
 315     /* For simplicity invalidate the display whenever a control register
 316        is writen to.  */
 317     s->invalidate = 1;
 318     offset -= s->base;
 319     if (offset >= 0x200 && offset < 0x400) {
 320         /* Pallette.  */
 321         n = (offset - 0x200) >> 2;
 322         s->raw_pallette[(offset - 0x200) >> 2] = val;
 323         pl110_update_pallette(s, n);
 324         return;
 325     }
 326     switch (offset >> 2) {
 327     case 0: /* LCDTiming0 */
 328         s->timing[0] = val;
 329         n = ((val & 0xfc) + 4) * 4;
 330         pl110_resize(s, n, s->rows);
 331         break;
 332     case 1: /* LCDTiming1 */
 333         s->timing[1] = val;
 334         n = (val & 0x3ff) + 1;
 335         pl110_resize(s, s->cols, n);
 336         break;
 337     case 2: /* LCDTiming2 */
 338         s->timing[2] = val;
 339         break;
 340     case 3: /* LCDTiming3 */
 341         s->timing[3] = val;
 342         break;
 343     case 4: /* LCDUPBASE */
 344         s->upbase = val;
 345         break;
 346     case 5: /* LCDLPBASE */
 347         s->lpbase = val;
 348         break;
 349     case 6: /* LCDIMSC */
 350         s->int_mask = val;
 351         pl110_update(s);
 352         break;
 353     case 7: /* LCDControl */
 354         s->cr = val;
 355         s->bpp = (val >> 1) & 7;
 356         if (pl110_enabled(s)) {
 357             dpy_resize(s->ds, s->cols, s->rows);
 358         }
 359         break;
 360     case 10: /* LCDICR */
 361         s->int_status &= ~val;
 362         pl110_update(s);
 363         break;
 364     default:
 365         cpu_abort (cpu_single_env, "pl110_write: Bad offset %x\n", offset);
 366     }
 367 }
 368
 369 static CPUReadMemoryFunc *pl110_readfn[] = {
 370    pl110_read,
 371    pl110_read,
 372    pl110_read
 373 };
 374
 375 static CPUWriteMemoryFunc *pl110_writefn[] = {
 376    pl110_write,
 377    pl110_write,
 378    pl110_write
 379 };
 380
 381 void *pl110_init(DisplayState *ds, uint32_t base, void *pic, int irq)
 382 {
 383     pl110_state *s;
 384     int iomemtype;
 385
 386     s = (pl110_state *)qemu_mallocz(sizeof(pl110_state));
 387     iomemtype = cpu_register_io_memory(0, pl110_readfn,
 388                                        pl110_writefn, s);
 389     cpu_register_physical_memory(base, 0x007fffff, iomemtype);
 390     s->base = base;
 391     s->ds = ds;
 392     s->pic = pic;
 393     s->irq = irq;
 394     /* ??? Save/restore.  */
 395     return s;
 396 }