hw/omap_lcdc.c

   1 /*
   2  * OMAP LCD controller.
   3  *
   4  * Copyright (C) 2006-2007 Andrzej Zaborowski  <balrog@zabor.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "hw.h"
  20 #include "console.h"
  21 #include "omap.h"
  22 #include "framebuffer.h"
  23
  24 struct omap_lcd_panel_s {
  25     MemoryRegion iomem;
  26     qemu_irq irq;
  27     DisplayState *state;
  28
  29     int plm;
  30     int tft;
  31     int mono;
  32     int enable;
  33     int width;
  34     int height;
  35     int interrupts;
  36     uint32_t timing[3];
  37     uint32_t subpanel;
  38     uint32_t ctrl;
  39
  40     struct omap_dma_lcd_channel_s *dma;
  41     uint16_t palette[256];
  42     int palette_done;
  43     int frame_done;
  44     int invalidate;
  45     int sync_error;
  46 };
  47
  48 static void omap_lcd_interrupts(struct omap_lcd_panel_s *s)
  49 {
  50     if (s->frame_done && (s->interrupts & 1)) {
  51         qemu_irq_raise(s->irq);
  52         return;
  53     }
  54
  55     if (s->palette_done && (s->interrupts & 2)) {
  56         qemu_irq_raise(s->irq);
  57         return;
  58     }
  59
  60     if (s->sync_error) {
  61         qemu_irq_raise(s->irq);
  62         return;
  63     }
  64
  65     qemu_irq_lower(s->irq);
  66 }
  67
  68 #include "pixel_ops.h"
  69
  70 #define draw_line_func drawfn
  71
  72 #define DEPTH 8
  73 #include "omap_lcd_template.h"
  74 #define DEPTH 15
  75 #include "omap_lcd_template.h"
  76 #define DEPTH 16
  77 #include "omap_lcd_template.h"
  78 #define DEPTH 32
  79 #include "omap_lcd_template.h"
  80
  81 static draw_line_func draw_line_table2[33] = {
  82     [0 ... 32]  = NULL,
  83     [8]         = draw_line2_8,
  84     [15]        = draw_line2_15,
  85     [16]        = draw_line2_16,
  86     [32]        = draw_line2_32,
  87 }, draw_line_table4[33] = {
  88     [0 ... 32]  = NULL,
  89     [8]         = draw_line4_8,
  90     [15]        = draw_line4_15,
  91     [16]        = draw_line4_16,
  92     [32]        = draw_line4_32,
  93 }, draw_line_table8[33] = {
  94     [0 ... 32]  = NULL,
  95     [8]         = draw_line8_8,
  96     [15]        = draw_line8_15,
  97     [16]        = draw_line8_16,
  98     [32]        = draw_line8_32,
  99 }, draw_line_table12[33] = {
 100     [0 ... 32]  = NULL,
 101     [8]         = draw_line12_8,
 102     [15]        = draw_line12_15,
 103     [16]        = draw_line12_16,
 104     [32]        = draw_line12_32,
 105 }, draw_line_table16[33] = {
 106     [0 ... 32]  = NULL,
 107     [8]         = draw_line16_8,
 108     [15]        = draw_line16_15,
 109     [16]        = draw_line16_16,
 110     [32]        = draw_line16_32,
 111 };
 112
 113 static void omap_update_display(void *opaque)
 114 {
 115     struct omap_lcd_panel_s *omap_lcd = (struct omap_lcd_panel_s *) opaque;
 116     draw_line_func draw_line;
 117     int size, height, first, last;
 118     int width, linesize, step, bpp, frame_offset;
 119     target_phys_addr_t frame_base;
 120
 121     if (!omap_lcd || omap_lcd->plm == 1 ||
 122                     !omap_lcd->enable || !ds_get_bits_per_pixel(omap_lcd->state))
 123         return;
 124
 125     frame_offset = 0;
 126     if (omap_lcd->plm != 2) {
 127         cpu_physical_memory_read(omap_lcd->dma->phys_framebuffer[
 128                                   omap_lcd->dma->current_frame],
 129                                  (void *)omap_lcd->palette, 0x200);
 130         switch (omap_lcd->palette[0] >> 12 & 7) {
 131         case 3 ... 7:
 132             frame_offset += 0x200;
 133             break;
 134         default:
 135             frame_offset += 0x20;
 136         }
 137     }
 138
 139     /* Colour depth */
 140     switch ((omap_lcd->palette[0] >> 12) & 7) {
 141     case 1:
 142         draw_line = draw_line_table2[ds_get_bits_per_pixel(omap_lcd->state)];
 143         bpp = 2;
 144         break;
 145
 146     case 2:
 147         draw_line = draw_line_table4[ds_get_bits_per_pixel(omap_lcd->state)];
 148         bpp = 4;
 149         break;
 150
 151     case 3:
 152         draw_line = draw_line_table8[ds_get_bits_per_pixel(omap_lcd->state)];
 153         bpp = 8;
 154         break;
 155
 156     case 4 ... 7:
 157         if (!omap_lcd->tft)
 158             draw_line = draw_line_table12[ds_get_bits_per_pixel(omap_lcd->state)];
 159         else
 160             draw_line = draw_line_table16[ds_get_bits_per_pixel(omap_lcd->state)];
 161         bpp = 16;
 162         break;
 163
 164     default:
 165         /* Unsupported at the moment.  */
 166         return;
 167     }
 168
 169     /* Resolution */
 170     width = omap_lcd->width;
 171     if (width != ds_get_width(omap_lcd->state) ||
 172             omap_lcd->height != ds_get_height(omap_lcd->state)) {
 173         qemu_console_resize(omap_lcd->state,
 174                             omap_lcd->width, omap_lcd->height);
 175         omap_lcd->invalidate = 1;
 176     }
 177
 178     if (omap_lcd->dma->current_frame == 0)
 179         size = omap_lcd->dma->src_f1_bottom - omap_lcd->dma->src_f1_top;
 180     else
 181         size = omap_lcd->dma->src_f2_bottom - omap_lcd->dma->src_f2_top;
 182
 183     if (frame_offset + ((width * omap_lcd->height * bpp) >> 3) > size + 2) {
 184         omap_lcd->sync_error = 1;
 185         omap_lcd_interrupts(omap_lcd);
 186         omap_lcd->enable = 0;
 187         return;
 188     }
 189
 190     /* Content */
 191     frame_base = omap_lcd->dma->phys_framebuffer[
 192             omap_lcd->dma->current_frame] + frame_offset;
 193     omap_lcd->dma->condition |= 1 << omap_lcd->dma->current_frame;
 194     if (omap_lcd->dma->interrupts & 1)
 195         qemu_irq_raise(omap_lcd->dma->irq);
 196     if (omap_lcd->dma->dual)
 197         omap_lcd->dma->current_frame ^= 1;
 198
 199     if (!ds_get_bits_per_pixel(omap_lcd->state))
 200         return;
 201
 202     first = 0;
 203     height = omap_lcd->height;
 204     if (omap_lcd->subpanel & (1 << 31)) {
 205         if (omap_lcd->subpanel & (1 << 29))
 206             first = (omap_lcd->subpanel >> 16) & 0x3ff;
 207         else
 208             height = (omap_lcd->subpanel >> 16) & 0x3ff;
 209         /* TODO: fill the rest of the panel with DPD */
 210     }
 211
 212     step = width * bpp >> 3;
 213     linesize = ds_get_linesize(omap_lcd->state);
 214     framebuffer_update_display(omap_lcd->state,
 215                                frame_base, width, height,
 216                                step, linesize, 0,
 217                                omap_lcd->invalidate,
 218                                draw_line, omap_lcd->palette,
 219                                &first, &last);
 220     if (first >= 0) {
 221         dpy_update(omap_lcd->state, 0, first, width, last - first + 1);
 222     }
 223     omap_lcd->invalidate = 0;
 224 }
 225
 226 static int ppm_save(const char *filename, uint8_t *data,
 227                 int w, int h, int linesize)
 228 {
 229     FILE *f;
 230     uint8_t *d, *d1;
 231     unsigned int v;
 232     int y, x, bpp;
 233
 234     f = fopen(filename, "wb");
 235     if (!f)
 236         return -1;
 237     fprintf(f, "P6\n%d %d\n%d\n", w, h, 255);
 238     d1 = data;
 239     bpp = linesize / w;
 240     for (y = 0; y < h; y ++) {
 241         d = d1;
 242         for (x = 0; x < w; x ++) {
 243             v = *(uint32_t *) d;
 244             switch (bpp) {
 245             case 2:
 246                 fputc((v >> 8) & 0xf8, f);
 247                 fputc((v >> 3) & 0xfc, f);
 248                 fputc((v << 3) & 0xf8, f);
 249                 break;
 250             case 3:
 251             case 4:
 252             default:
 253                 fputc((v >> 16) & 0xff, f);
 254                 fputc((v >> 8) & 0xff, f);
 255                 fputc((v) & 0xff, f);
 256                 break;
 257             }
 258             d += bpp;
 259         }
 260         d1 += linesize;
 261     }
 262     fclose(f);
 263     return 0;
 264 }
 265
 266 static void omap_screen_dump(void *opaque, const char *filename) {
 267     struct omap_lcd_panel_s *omap_lcd = opaque;
 268     omap_update_display(opaque);
 269     if (omap_lcd && ds_get_data(omap_lcd->state))
 270         ppm_save(filename, ds_get_data(omap_lcd->state),
 271                 omap_lcd->width, omap_lcd->height,
 272                 ds_get_linesize(omap_lcd->state));
 273 }
 274
 275 static void omap_invalidate_display(void *opaque) {
 276     struct omap_lcd_panel_s *omap_lcd = opaque;
 277     omap_lcd->invalidate = 1;
 278 }
 279
 280 static void omap_lcd_update(struct omap_lcd_panel_s *s) {
 281     if (!s->enable) {
 282         s->dma->current_frame = -1;
 283         s->sync_error = 0;
 284         if (s->plm != 1)
 285             s->frame_done = 1;
 286         omap_lcd_interrupts(s);
 287         return;
 288     }
 289
 290     if (s->dma->current_frame == -1) {
 291         s->frame_done = 0;
 292         s->palette_done = 0;
 293         s->dma->current_frame = 0;
 294     }
 295
 296     if (!s->dma->mpu->port[s->dma->src].addr_valid(s->dma->mpu,
 297                             s->dma->src_f1_top) ||
 298                     !s->dma->mpu->port[
 299                     s->dma->src].addr_valid(s->dma->mpu,
 300                             s->dma->src_f1_bottom) ||
 301                     (s->dma->dual &&
 302                      (!s->dma->mpu->port[
 303                       s->dma->src].addr_valid(s->dma->mpu,
 304                               s->dma->src_f2_top) ||
 305                       !s->dma->mpu->port[
 306                       s->dma->src].addr_valid(s->dma->mpu,
 307                               s->dma->src_f2_bottom)))) {
 308         s->dma->condition |= 1 << 2;
 309         if (s->dma->interrupts & (1 << 1))
 310             qemu_irq_raise(s->dma->irq);
 311         s->enable = 0;
 312         return;
 313     }
 314
 315     s->dma->phys_framebuffer[0] = s->dma->src_f1_top;
 316     s->dma->phys_framebuffer[1] = s->dma->src_f2_top;
 317
 318     if (s->plm != 2 && !s->palette_done) {
 319         cpu_physical_memory_read(
 320             s->dma->phys_framebuffer[s->dma->current_frame],
 321             (void *)s->palette, 0x200);
 322         s->palette_done = 1;
 323         omap_lcd_interrupts(s);
 324     }
 325 }
 326
 327 static uint64_t omap_lcdc_read(void *opaque, target_phys_addr_t addr,
 328                                unsigned size)
 329 {
 330     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 331
 332     switch (addr) {
 333     case 0x00:  /* LCD_CONTROL */
 334         return (s->tft << 23) | (s->plm << 20) |
 335                 (s->tft << 7) | (s->interrupts << 3) |
 336                 (s->mono << 1) | s->enable | s->ctrl | 0xfe000c34;
 337
 338     case 0x04:  /* LCD_TIMING0 */
 339         return (s->timing[0] << 10) | (s->width - 1) | 0x0000000f;
 340
 341     case 0x08:  /* LCD_TIMING1 */
 342         return (s->timing[1] << 10) | (s->height - 1);
 343
 344     case 0x0c:  /* LCD_TIMING2 */
 345         return s->timing[2] | 0xfc000000;
 346
 347     case 0x10:  /* LCD_STATUS */
 348         return (s->palette_done << 6) | (s->sync_error << 2) | s->frame_done;
 349
 350     case 0x14:  /* LCD_SUBPANEL */
 351         return s->subpanel;
 352
 353     default:
 354         break;
 355     }
 356     OMAP_BAD_REG(addr);
 357     return 0;
 358 }
 359
 360 static void omap_lcdc_write(void *opaque, target_phys_addr_t addr,
 361                             uint64_t value, unsigned size)
 362 {
 363     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 364
 365     switch (addr) {
 366     case 0x00:  /* LCD_CONTROL */
 367         s->plm = (value >> 20) & 3;
 368         s->tft = (value >> 7) & 1;
 369         s->interrupts = (value >> 3) & 3;
 370         s->mono = (value >> 1) & 1;
 371         s->ctrl = value & 0x01cff300;
 372         if (s->enable != (value & 1)) {
 373             s->enable = value & 1;
 374             omap_lcd_update(s);
 375         }
 376         break;
 377
 378     case 0x04:  /* LCD_TIMING0 */
 379         s->timing[0] = value >> 10;
 380         s->width = (value & 0x3ff) + 1;
 381         break;
 382
 383     case 0x08:  /* LCD_TIMING1 */
 384         s->timing[1] = value >> 10;
 385         s->height = (value & 0x3ff) + 1;
 386         break;
 387
 388     case 0x0c:  /* LCD_TIMING2 */
 389         s->timing[2] = value;
 390         break;
 391
 392     case 0x10:  /* LCD_STATUS */
 393         break;
 394
 395     case 0x14:  /* LCD_SUBPANEL */
 396         s->subpanel = value & 0xa1ffffff;
 397         break;
 398
 399     default:
 400         OMAP_BAD_REG(addr);
 401     }
 402 }
 403
 404 static const MemoryRegionOps omap_lcdc_ops = {
 405     .read = omap_lcdc_read,
 406     .write = omap_lcdc_write,
 407     .endianness = DEVICE_NATIVE_ENDIAN,
 408 };
 409
 410 void omap_lcdc_reset(struct omap_lcd_panel_s *s)
 411 {
 412     s->dma->current_frame = -1;
 413     s->plm = 0;
 414     s->tft = 0;
 415     s->mono = 0;
 416     s->enable = 0;
 417     s->width = 0;
 418     s->height = 0;
 419     s->interrupts = 0;
 420     s->timing[0] = 0;
 421     s->timing[1] = 0;
 422     s->timing[2] = 0;
 423     s->subpanel = 0;
 424     s->palette_done = 0;
 425     s->frame_done = 0;
 426     s->sync_error = 0;
 427     s->invalidate = 1;
 428     s->subpanel = 0;
 429     s->ctrl = 0;
 430 }
 431
 432 struct omap_lcd_panel_s *omap_lcdc_init(MemoryRegion *sysmem,
 433                                         target_phys_addr_t base,
 434                                         qemu_irq irq,
 435                                         struct omap_dma_lcd_channel_s *dma,
 436                                         omap_clk clk)
 437 {
 438     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *)
 439             g_malloc0(sizeof(struct omap_lcd_panel_s));
 440
 441     s->irq = irq;
 442     s->dma = dma;
 443     omap_lcdc_reset(s);
 444
 445     memory_region_init_io(&s->iomem, &omap_lcdc_ops, s, "omap.lcdc", 0x100);
 446     memory_region_add_subregion(sysmem, base, &s->iomem);
 447
 448     s->state = graphic_console_init(omap_update_display,
 449                                     omap_invalidate_display,
 450                                     omap_screen_dump, NULL, s);
 451
 452     return s;
 453 }