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 };
  29
  30 typedef struct {
  31     SysBusDevice busdev;
  32     DisplayState *ds;
  33
  34     /* The Versatile/PB uses a slightly modified PL110 controller.  */
  35     int versatile;
  36     uint32_t timing[4];
  37     uint32_t cr;
  38     uint32_t upbase;
  39     uint32_t lpbase;
  40     uint32_t int_status;
  41     uint32_t int_mask;
  42     int cols;
  43     int rows;
  44     enum pl110_bppmode bpp;
  45     int invalidate;
  46     uint32_t pallette[256];
  47     uint32_t raw_pallette[128];
  48     qemu_irq irq;
  49 } pl110_state;
  50
  51 static const VMStateDescription vmstate_pl110 = {
  52     .name = "pl110",
  53     .version_id = 1,
  54     .minimum_version_id = 1,
  55     .fields = (VMStateField[]) {
  56         VMSTATE_INT32(versatile, pl110_state),
  57         VMSTATE_UINT32_ARRAY(timing, pl110_state, 4),
  58         VMSTATE_UINT32(cr, pl110_state),
  59         VMSTATE_UINT32(upbase, pl110_state),
  60         VMSTATE_UINT32(lpbase, pl110_state),
  61         VMSTATE_UINT32(int_status, pl110_state),
  62         VMSTATE_UINT32(int_mask, pl110_state),
  63         VMSTATE_INT32(cols, pl110_state),
  64         VMSTATE_INT32(rows, pl110_state),
  65         VMSTATE_UINT32(bpp, pl110_state),
  66         VMSTATE_INT32(invalidate, pl110_state),
  67         VMSTATE_UINT32_ARRAY(pallette, pl110_state, 256),
  68         VMSTATE_UINT32_ARRAY(raw_pallette, pl110_state, 128),
  69         VMSTATE_END_OF_LIST()
  70     }
  71 };
  72
  73 static const unsigned char pl110_id[] =
  74 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  75
  76 /* The Arm documentation (DDI0224C) says the CLDC on the Versatile board
  77    has a different ID.  However Linux only looks for the normal ID.  */
  78 #if 0
  79 static const unsigned char pl110_versatile_id[] =
  80 { 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
  81 #else
  82 #define pl110_versatile_id pl110_id
  83 #endif
  84
  85 #include "pixel_ops.h"
  86
  87 #define BITS 8
  88 #include "pl110_template.h"
  89 #define BITS 15
  90 #include "pl110_template.h"
  91 #define BITS 16
  92 #include "pl110_template.h"
  93 #define BITS 24
  94 #include "pl110_template.h"
  95 #define BITS 32
  96 #include "pl110_template.h"
  97
  98 static int pl110_enabled(pl110_state *s)
  99 {
 100   return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
 101 }
 102
 103 static void pl110_update_display(void *opaque)
 104 {
 105     pl110_state *s = (pl110_state *)opaque;
 106     drawfn* fntable;
 107     drawfn fn;
 108     int dest_width;
 109     int src_width;
 110     int bpp_offset;
 111     int first;
 112     int last;
 113
 114     if (!pl110_enabled(s))
 115         return;
 116
 117     switch (ds_get_bits_per_pixel(s->ds)) {
 118     case 0:
 119         return;
 120     case 8:
 121         fntable = pl110_draw_fn_8;
 122         dest_width = 1;
 123         break;
 124     case 15:
 125         fntable = pl110_draw_fn_15;
 126         dest_width = 2;
 127         break;
 128     case 16:
 129         fntable = pl110_draw_fn_16;
 130         dest_width = 2;
 131         break;
 132     case 24:
 133         fntable = pl110_draw_fn_24;
 134         dest_width = 3;
 135         break;
 136     case 32:
 137         fntable = pl110_draw_fn_32;
 138         dest_width = 4;
 139         break;
 140     default:
 141         fprintf(stderr, "pl110: Bad color depth\n");
 142         exit(1);
 143     }
 144     if (s->cr & PL110_CR_BGR)
 145         bpp_offset = 0;
 146     else
 147         bpp_offset = 18;
 148
 149     if (s->cr & PL110_CR_BEBO)
 150         fn = fntable[s->bpp + 6 + bpp_offset];
 151     else if (s->cr & PL110_CR_BEPO)
 152         fn = fntable[s->bpp + 12 + bpp_offset];
 153     else
 154         fn = fntable[s->bpp + bpp_offset];
 155
 156     src_width = s->cols;
 157     switch (s->bpp) {
 158     case BPP_1:
 159         src_width >>= 3;
 160         break;
 161     case BPP_2:
 162         src_width >>= 2;
 163         break;
 164     case BPP_4:
 165         src_width >>= 1;
 166         break;
 167     case BPP_8:
 168         break;
 169     case BPP_16:
 170         src_width <<= 1;
 171         break;
 172     case BPP_32:
 173         src_width <<= 2;
 174         break;
 175     }
 176     dest_width *= s->cols;
 177     first = 0;
 178     framebuffer_update_display(s->ds,
 179                                s->upbase, s->cols, s->rows,
 180                                src_width, dest_width, 0,
 181                                s->invalidate,
 182                                fn, s->pallette,
 183                                &first, &last);
 184     if (first >= 0) {
 185         dpy_update(s->ds, 0, first, s->cols, last - first + 1);
 186     }
 187     s->invalidate = 0;
 188 }
 189
 190 static void pl110_invalidate_display(void * opaque)
 191 {
 192     pl110_state *s = (pl110_state *)opaque;
 193     s->invalidate = 1;
 194     if (pl110_enabled(s)) {
 195         qemu_console_resize(s->ds, s->cols, s->rows);
 196     }
 197 }
 198
 199 static void pl110_update_pallette(pl110_state *s, int n)
 200 {
 201     int i;
 202     uint32_t raw;
 203     unsigned int r, g, b;
 204
 205     raw = s->raw_pallette[n];
 206     n <<= 1;
 207     for (i = 0; i < 2; i++) {
 208         r = (raw & 0x1f) << 3;
 209         raw >>= 5;
 210         g = (raw & 0x1f) << 3;
 211         raw >>= 5;
 212         b = (raw & 0x1f) << 3;
 213         /* The I bit is ignored.  */
 214         raw >>= 6;
 215         switch (ds_get_bits_per_pixel(s->ds)) {
 216         case 8:
 217             s->pallette[n] = rgb_to_pixel8(r, g, b);
 218             break;
 219         case 15:
 220             s->pallette[n] = rgb_to_pixel15(r, g, b);
 221             break;
 222         case 16:
 223             s->pallette[n] = rgb_to_pixel16(r, g, b);
 224             break;
 225         case 24:
 226         case 32:
 227             s->pallette[n] = rgb_to_pixel32(r, g, b);
 228             break;
 229         }
 230         n++;
 231     }
 232 }
 233
 234 static void pl110_resize(pl110_state *s, int width, int height)
 235 {
 236     if (width != s->cols || height != s->rows) {
 237         if (pl110_enabled(s)) {
 238             qemu_console_resize(s->ds, width, height);
 239         }
 240     }
 241     s->cols = width;
 242     s->rows = height;
 243 }
 244
 245 /* Update interrupts.  */
 246 static void pl110_update(pl110_state *s)
 247 {
 248   /* TODO: Implement interrupts.  */
 249 }
 250
 251 static uint32_t pl110_read(void *opaque, target_phys_addr_t offset)
 252 {
 253     pl110_state *s = (pl110_state *)opaque;
 254
 255     if (offset >= 0xfe0 && offset < 0x1000) {
 256         if (s->versatile)
 257             return pl110_versatile_id[(offset - 0xfe0) >> 2];
 258         else
 259             return pl110_id[(offset - 0xfe0) >> 2];
 260     }
 261     if (offset >= 0x200 && offset < 0x400) {
 262         return s->raw_pallette[(offset - 0x200) >> 2];
 263     }
 264     switch (offset >> 2) {
 265     case 0: /* LCDTiming0 */
 266         return s->timing[0];
 267     case 1: /* LCDTiming1 */
 268         return s->timing[1];
 269     case 2: /* LCDTiming2 */
 270         return s->timing[2];
 271     case 3: /* LCDTiming3 */
 272         return s->timing[3];
 273     case 4: /* LCDUPBASE */
 274         return s->upbase;
 275     case 5: /* LCDLPBASE */
 276         return s->lpbase;
 277     case 6: /* LCDIMSC */
 278         if (s->versatile)
 279           return s->cr;
 280         return s->int_mask;
 281     case 7: /* LCDControl */
 282         if (s->versatile)
 283           return s->int_mask;
 284         return s->cr;
 285     case 8: /* LCDRIS */
 286         return s->int_status;
 287     case 9: /* LCDMIS */
 288         return s->int_status & s->int_mask;
 289     case 11: /* LCDUPCURR */
 290         /* TODO: Implement vertical refresh.  */
 291         return s->upbase;
 292     case 12: /* LCDLPCURR */
 293         return s->lpbase;
 294     default:
 295         hw_error("pl110_read: Bad offset %x\n", (int)offset);
 296         return 0;
 297     }
 298 }
 299
 300 static void pl110_write(void *opaque, target_phys_addr_t offset,
 301                         uint32_t val)
 302 {
 303     pl110_state *s = (pl110_state *)opaque;
 304     int n;
 305
 306     /* For simplicity invalidate the display whenever a control register
 307        is writen to.  */
 308     s->invalidate = 1;
 309     if (offset >= 0x200 && offset < 0x400) {
 310         /* Pallette.  */
 311         n = (offset - 0x200) >> 2;
 312         s->raw_pallette[(offset - 0x200) >> 2] = val;
 313         pl110_update_pallette(s, n);
 314         return;
 315     }
 316     switch (offset >> 2) {
 317     case 0: /* LCDTiming0 */
 318         s->timing[0] = val;
 319         n = ((val & 0xfc) + 4) * 4;
 320         pl110_resize(s, n, s->rows);
 321         break;
 322     case 1: /* LCDTiming1 */
 323         s->timing[1] = val;
 324         n = (val & 0x3ff) + 1;
 325         pl110_resize(s, s->cols, n);
 326         break;
 327     case 2: /* LCDTiming2 */
 328         s->timing[2] = val;
 329         break;
 330     case 3: /* LCDTiming3 */
 331         s->timing[3] = val;
 332         break;
 333     case 4: /* LCDUPBASE */
 334         s->upbase = val;
 335         break;
 336     case 5: /* LCDLPBASE */
 337         s->lpbase = val;
 338         break;
 339     case 6: /* LCDIMSC */
 340         if (s->versatile)
 341             goto control;
 342     imsc:
 343         s->int_mask = val;
 344         pl110_update(s);
 345         break;
 346     case 7: /* LCDControl */
 347         if (s->versatile)
 348             goto imsc;
 349     control:
 350         s->cr = val;
 351         s->bpp = (val >> 1) & 7;
 352         if (pl110_enabled(s)) {
 353             qemu_console_resize(s->ds, s->cols, s->rows);
 354         }
 355         break;
 356     case 10: /* LCDICR */
 357         s->int_status &= ~val;
 358         pl110_update(s);
 359         break;
 360     default:
 361         hw_error("pl110_write: Bad offset %x\n", (int)offset);
 362     }
 363 }
 364
 365 static CPUReadMemoryFunc * const pl110_readfn[] = {
 366    pl110_read,
 367    pl110_read,
 368    pl110_read
 369 };
 370
 371 static CPUWriteMemoryFunc * const pl110_writefn[] = {
 372    pl110_write,
 373    pl110_write,
 374    pl110_write
 375 };
 376
 377 static int pl110_init(SysBusDevice *dev)
 378 {
 379     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 380     int iomemtype;
 381
 382     iomemtype = cpu_register_io_memory(pl110_readfn,
 383                                        pl110_writefn, s,
 384                                        DEVICE_NATIVE_ENDIAN);
 385     sysbus_init_mmio(dev, 0x1000, iomemtype);
 386     sysbus_init_irq(dev, &s->irq);
 387     s->ds = graphic_console_init(pl110_update_display,
 388                                  pl110_invalidate_display,
 389                                  NULL, NULL, s);
 390     return 0;
 391 }
 392
 393 static int pl110_versatile_init(SysBusDevice *dev)
 394 {
 395     pl110_state *s = FROM_SYSBUS(pl110_state, dev);
 396     s->versatile = 1;
 397     return pl110_init(dev);
 398 }
 399
 400 static SysBusDeviceInfo pl110_info = {
 401     .init = pl110_init,
 402     .qdev.name = "pl110",
 403     .qdev.size = sizeof(pl110_state),
 404     .qdev.vmsd = &vmstate_pl110,
 405     .qdev.no_user = 1,
 406 };
 407
 408 static SysBusDeviceInfo pl110_versatile_info = {
 409     .init = pl110_versatile_init,
 410     .qdev.name = "pl110_versatile",
 411     .qdev.size = sizeof(pl110_state),
 412     .qdev.vmsd = &vmstate_pl110,
 413     .qdev.no_user = 1,
 414 };
 415
 416 static void pl110_register_devices(void)
 417 {
 418     sysbus_register_withprop(&pl110_info);
 419     sysbus_register_withprop(&pl110_versatile_info);
 420 }
 421
 422 device_init(pl110_register_devices)