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     qemu_irq irq;
  26     DisplayState *state;
  27     ram_addr_t imif_base;
  28     ram_addr_t emiff_base;
  29
  30     int plm;
  31     int tft;
  32     int mono;
  33     int enable;
  34     int width;
  35     int height;
  36     int interrupts;
  37     uint32_t timing[3];
  38     uint32_t subpanel;
  39     uint32_t ctrl;
  40
  41     struct omap_dma_lcd_channel_s *dma;
  42     uint16_t palette[256];
  43     int palette_done;
  44     int frame_done;
  45     int invalidate;
  46     int sync_error;
  47 };
  48
  49 static void omap_lcd_interrupts(struct omap_lcd_panel_s *s)
  50 {
  51     if (s->frame_done && (s->interrupts & 1)) {
  52         qemu_irq_raise(s->irq);
  53         return;
  54     }
  55
  56     if (s->palette_done && (s->interrupts & 2)) {
  57         qemu_irq_raise(s->irq);
  58         return;
  59     }
  60
  61     if (s->sync_error) {
  62         qemu_irq_raise(s->irq);
  63         return;
  64     }
  65
  66     qemu_irq_lower(s->irq);
  67 }
  68
  69 #include "pixel_ops.h"
  70
  71 #define draw_line_func drawfn
  72
  73 #define DEPTH 8
  74 #include "omap_lcd_template.h"
  75 #define DEPTH 15
  76 #include "omap_lcd_template.h"
  77 #define DEPTH 16
  78 #include "omap_lcd_template.h"
  79 #define DEPTH 32
  80 #include "omap_lcd_template.h"
  81
  82 static draw_line_func draw_line_table2[33] = {
  83     [0 ... 32]  = NULL,
  84     [8]         = draw_line2_8,
  85     [15]        = draw_line2_15,
  86     [16]        = draw_line2_16,
  87     [32]        = draw_line2_32,
  88 }, draw_line_table4[33] = {
  89     [0 ... 32]  = NULL,
  90     [8]         = draw_line4_8,
  91     [15]        = draw_line4_15,
  92     [16]        = draw_line4_16,
  93     [32]        = draw_line4_32,
  94 }, draw_line_table8[33] = {
  95     [0 ... 32]  = NULL,
  96     [8]         = draw_line8_8,
  97     [15]        = draw_line8_15,
  98     [16]        = draw_line8_16,
  99     [32]        = draw_line8_32,
 100 }, draw_line_table12[33] = {
 101     [0 ... 32]  = NULL,
 102     [8]         = draw_line12_8,
 103     [15]        = draw_line12_15,
 104     [16]        = draw_line12_16,
 105     [32]        = draw_line12_32,
 106 }, draw_line_table16[33] = {
 107     [0 ... 32]  = NULL,
 108     [8]         = draw_line16_8,
 109     [15]        = draw_line16_15,
 110     [16]        = draw_line16_16,
 111     [32]        = draw_line16_32,
 112 };
 113
 114 static void omap_update_display(void *opaque)
 115 {
 116     struct omap_lcd_panel_s *omap_lcd = (struct omap_lcd_panel_s *) opaque;
 117     draw_line_func draw_line;
 118     int size, height, first, last;
 119     int width, linesize, step, bpp, frame_offset;
 120     target_phys_addr_t frame_base;
 121
 122     if (!omap_lcd || omap_lcd->plm == 1 ||
 123                     !omap_lcd->enable || !ds_get_bits_per_pixel(omap_lcd->state))
 124         return;
 125
 126     frame_offset = 0;
 127     if (omap_lcd->plm != 2) {
 128         cpu_physical_memory_read(omap_lcd->dma->phys_framebuffer[
 129                                   omap_lcd->dma->current_frame],
 130                                  (void *)omap_lcd->palette, 0x200);
 131         switch (omap_lcd->palette[0] >> 12 & 7) {
 132         case 3 ... 7:
 133             frame_offset += 0x200;
 134             break;
 135         default:
 136             frame_offset += 0x20;
 137         }
 138     }
 139
 140     /* Colour depth */
 141     switch ((omap_lcd->palette[0] >> 12) & 7) {
 142     case 1:
 143         draw_line = draw_line_table2[ds_get_bits_per_pixel(omap_lcd->state)];
 144         bpp = 2;
 145         break;
 146
 147     case 2:
 148         draw_line = draw_line_table4[ds_get_bits_per_pixel(omap_lcd->state)];
 149         bpp = 4;
 150         break;
 151
 152     case 3:
 153         draw_line = draw_line_table8[ds_get_bits_per_pixel(omap_lcd->state)];
 154         bpp = 8;
 155         break;
 156
 157     case 4 ... 7:
 158         if (!omap_lcd->tft)
 159             draw_line = draw_line_table12[ds_get_bits_per_pixel(omap_lcd->state)];
 160         else
 161             draw_line = draw_line_table16[ds_get_bits_per_pixel(omap_lcd->state)];
 162         bpp = 16;
 163         break;
 164
 165     default:
 166         /* Unsupported at the moment.  */
 167         return;
 168     }
 169
 170     /* Resolution */
 171     width = omap_lcd->width;
 172     if (width != ds_get_width(omap_lcd->state) ||
 173             omap_lcd->height != ds_get_height(omap_lcd->state)) {
 174         qemu_console_resize(omap_lcd->state,
 175                             omap_lcd->width, omap_lcd->height);
 176         omap_lcd->invalidate = 1;
 177     }
 178
 179     if (omap_lcd->dma->current_frame == 0)
 180         size = omap_lcd->dma->src_f1_bottom - omap_lcd->dma->src_f1_top;
 181     else
 182         size = omap_lcd->dma->src_f2_bottom - omap_lcd->dma->src_f2_top;
 183
 184     if (frame_offset + ((width * omap_lcd->height * bpp) >> 3) > size + 2) {
 185         omap_lcd->sync_error = 1;
 186         omap_lcd_interrupts(omap_lcd);
 187         omap_lcd->enable = 0;
 188         return;
 189     }
 190
 191     /* Content */
 192     frame_base = omap_lcd->dma->phys_framebuffer[
 193             omap_lcd->dma->current_frame] + frame_offset;
 194     omap_lcd->dma->condition |= 1 << omap_lcd->dma->current_frame;
 195     if (omap_lcd->dma->interrupts & 1)
 196         qemu_irq_raise(omap_lcd->dma->irq);
 197     if (omap_lcd->dma->dual)
 198         omap_lcd->dma->current_frame ^= 1;
 199
 200     if (!ds_get_bits_per_pixel(omap_lcd->state))
 201         return;
 202
 203     first = 0;
 204     height = omap_lcd->height;
 205     if (omap_lcd->subpanel & (1 << 31)) {
 206         if (omap_lcd->subpanel & (1 << 29))
 207             first = (omap_lcd->subpanel >> 16) & 0x3ff;
 208         else
 209             height = (omap_lcd->subpanel >> 16) & 0x3ff;
 210         /* TODO: fill the rest of the panel with DPD */
 211     }
 212
 213     step = width * bpp >> 3;
 214     linesize = ds_get_linesize(omap_lcd->state);
 215     framebuffer_update_display(omap_lcd->state,
 216                                frame_base, width, height,
 217                                step, linesize, 0,
 218                                omap_lcd->invalidate,
 219                                draw_line, omap_lcd->palette,
 220                                &first, &last);
 221     if (first >= 0) {
 222         dpy_update(omap_lcd->state, 0, first, width, last - first + 1);
 223     }
 224     omap_lcd->invalidate = 0;
 225 }
 226
 227 static int ppm_save(const char *filename, uint8_t *data,
 228                 int w, int h, int linesize)
 229 {
 230     FILE *f;
 231     uint8_t *d, *d1;
 232     unsigned int v;
 233     int y, x, bpp;
 234
 235     f = fopen(filename, "wb");
 236     if (!f)
 237         return -1;
 238     fprintf(f, "P6\n%d %d\n%d\n", w, h, 255);
 239     d1 = data;
 240     bpp = linesize / w;
 241     for (y = 0; y < h; y ++) {
 242         d = d1;
 243         for (x = 0; x < w; x ++) {
 244             v = *(uint32_t *) d;
 245             switch (bpp) {
 246             case 2:
 247                 fputc((v >> 8) & 0xf8, f);
 248                 fputc((v >> 3) & 0xfc, f);
 249                 fputc((v << 3) & 0xf8, f);
 250                 break;
 251             case 3:
 252             case 4:
 253             default:
 254                 fputc((v >> 16) & 0xff, f);
 255                 fputc((v >> 8) & 0xff, f);
 256                 fputc((v) & 0xff, f);
 257                 break;
 258             }
 259             d += bpp;
 260         }
 261         d1 += linesize;
 262     }
 263     fclose(f);
 264     return 0;
 265 }
 266
 267 static void omap_screen_dump(void *opaque, const char *filename) {
 268     struct omap_lcd_panel_s *omap_lcd = opaque;
 269     omap_update_display(opaque);
 270     if (omap_lcd && ds_get_data(omap_lcd->state))
 271         ppm_save(filename, ds_get_data(omap_lcd->state),
 272                 omap_lcd->width, omap_lcd->height,
 273                 ds_get_linesize(omap_lcd->state));
 274 }
 275
 276 static void omap_invalidate_display(void *opaque) {
 277     struct omap_lcd_panel_s *omap_lcd = opaque;
 278     omap_lcd->invalidate = 1;
 279 }
 280
 281 static void omap_lcd_update(struct omap_lcd_panel_s *s) {
 282     if (!s->enable) {
 283         s->dma->current_frame = -1;
 284         s->sync_error = 0;
 285         if (s->plm != 1)
 286             s->frame_done = 1;
 287         omap_lcd_interrupts(s);
 288         return;
 289     }
 290
 291     if (s->dma->current_frame == -1) {
 292         s->frame_done = 0;
 293         s->palette_done = 0;
 294         s->dma->current_frame = 0;
 295     }
 296
 297     if (!s->dma->mpu->port[s->dma->src].addr_valid(s->dma->mpu,
 298                             s->dma->src_f1_top) ||
 299                     !s->dma->mpu->port[
 300                     s->dma->src].addr_valid(s->dma->mpu,
 301                             s->dma->src_f1_bottom) ||
 302                     (s->dma->dual &&
 303                      (!s->dma->mpu->port[
 304                       s->dma->src].addr_valid(s->dma->mpu,
 305                               s->dma->src_f2_top) ||
 306                       !s->dma->mpu->port[
 307                       s->dma->src].addr_valid(s->dma->mpu,
 308                               s->dma->src_f2_bottom)))) {
 309         s->dma->condition |= 1 << 2;
 310         if (s->dma->interrupts & (1 << 1))
 311             qemu_irq_raise(s->dma->irq);
 312         s->enable = 0;
 313         return;
 314     }
 315
 316     s->dma->phys_framebuffer[0] = s->dma->src_f1_top;
 317     s->dma->phys_framebuffer[1] = s->dma->src_f2_top;
 318
 319     if (s->plm != 2 && !s->palette_done) {
 320         cpu_physical_memory_read(
 321             s->dma->phys_framebuffer[s->dma->current_frame],
 322             (void *)s->palette, 0x200);
 323         s->palette_done = 1;
 324         omap_lcd_interrupts(s);
 325     }
 326 }
 327
 328 static uint32_t omap_lcdc_read(void *opaque, target_phys_addr_t addr)
 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                 uint32_t value)
 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 CPUReadMemoryFunc * const omap_lcdc_readfn[] = {
 405     omap_lcdc_read,
 406     omap_lcdc_read,
 407     omap_lcdc_read,
 408 };
 409
 410 static CPUWriteMemoryFunc * const omap_lcdc_writefn[] = {
 411     omap_lcdc_write,
 412     omap_lcdc_write,
 413     omap_lcdc_write,
 414 };
 415
 416 void omap_lcdc_reset(struct omap_lcd_panel_s *s)
 417 {
 418     s->dma->current_frame = -1;
 419     s->plm = 0;
 420     s->tft = 0;
 421     s->mono = 0;
 422     s->enable = 0;
 423     s->width = 0;
 424     s->height = 0;
 425     s->interrupts = 0;
 426     s->timing[0] = 0;
 427     s->timing[1] = 0;
 428     s->timing[2] = 0;
 429     s->subpanel = 0;
 430     s->palette_done = 0;
 431     s->frame_done = 0;
 432     s->sync_error = 0;
 433     s->invalidate = 1;
 434     s->subpanel = 0;
 435     s->ctrl = 0;
 436 }
 437
 438 struct omap_lcd_panel_s *omap_lcdc_init(target_phys_addr_t base, qemu_irq irq,
 439                 struct omap_dma_lcd_channel_s *dma,
 440                 ram_addr_t imif_base, ram_addr_t emiff_base, omap_clk clk)
 441 {
 442     int iomemtype;
 443     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *)
 444             qemu_mallocz(sizeof(struct omap_lcd_panel_s));
 445
 446     s->irq = irq;
 447     s->dma = dma;
 448     s->imif_base = imif_base;
 449     s->emiff_base = emiff_base;
 450     omap_lcdc_reset(s);
 451
 452     iomemtype = cpu_register_io_memory(omap_lcdc_readfn,
 453                     omap_lcdc_writefn, s);
 454     cpu_register_physical_memory(base, 0x100, iomemtype);
 455
 456     s->state = graphic_console_init(omap_update_display,
 457                                     omap_invalidate_display,
 458                                     omap_screen_dump, NULL, s);
 459
 460     return s;
 461 }