hw/display/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/hw.h"
  20 #include "ui/console.h"
  21 #include "hw/arm/omap.h"
  22 #include "framebuffer.h"
  23 #include "ui/pixel_ops.h"
  24
  25 struct omap_lcd_panel_s {
  26     MemoryRegion *sysmem;
  27     MemoryRegion iomem;
  28     MemoryRegionSection fbsection;
  29     qemu_irq irq;
  30     QemuConsole *con;
  31
  32     int plm;
  33     int tft;
  34     int mono;
  35     int enable;
  36     int width;
  37     int height;
  38     int interrupts;
  39     uint32_t timing[3];
  40     uint32_t subpanel;
  41     uint32_t ctrl;
  42
  43     struct omap_dma_lcd_channel_s *dma;
  44     uint16_t palette[256];
  45     int palette_done;
  46     int frame_done;
  47     int invalidate;
  48     int sync_error;
  49 };
  50
  51 static void omap_lcd_interrupts(struct omap_lcd_panel_s *s)
  52 {
  53     if (s->frame_done && (s->interrupts & 1)) {
  54         qemu_irq_raise(s->irq);
  55         return;
  56     }
  57
  58     if (s->palette_done && (s->interrupts & 2)) {
  59         qemu_irq_raise(s->irq);
  60         return;
  61     }
  62
  63     if (s->sync_error) {
  64         qemu_irq_raise(s->irq);
  65         return;
  66     }
  67
  68     qemu_irq_lower(s->irq);
  69 }
  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     DisplaySurface *surface = qemu_console_surface(omap_lcd->con);
 118     draw_line_func draw_line;
 119     int size, height, first, last;
 120     int width, linesize, step, bpp, frame_offset;
 121     hwaddr frame_base;
 122
 123     if (!omap_lcd || omap_lcd->plm == 1 || !omap_lcd->enable ||
 124         !surface_bits_per_pixel(surface)) {
 125         return;
 126     }
 127
 128     frame_offset = 0;
 129     if (omap_lcd->plm != 2) {
 130         cpu_physical_memory_read(omap_lcd->dma->phys_framebuffer[
 131                                   omap_lcd->dma->current_frame],
 132                                  (void *)omap_lcd->palette, 0x200);
 133         switch (omap_lcd->palette[0] >> 12 & 7) {
 134         case 3 ... 7:
 135             frame_offset += 0x200;
 136             break;
 137         default:
 138             frame_offset += 0x20;
 139         }
 140     }
 141
 142     /* Colour depth */
 143     switch ((omap_lcd->palette[0] >> 12) & 7) {
 144     case 1:
 145         draw_line = draw_line_table2[surface_bits_per_pixel(surface)];
 146         bpp = 2;
 147         break;
 148
 149     case 2:
 150         draw_line = draw_line_table4[surface_bits_per_pixel(surface)];
 151         bpp = 4;
 152         break;
 153
 154     case 3:
 155         draw_line = draw_line_table8[surface_bits_per_pixel(surface)];
 156         bpp = 8;
 157         break;
 158
 159     case 4 ... 7:
 160         if (!omap_lcd->tft)
 161             draw_line = draw_line_table12[surface_bits_per_pixel(surface)];
 162         else
 163             draw_line = draw_line_table16[surface_bits_per_pixel(surface)];
 164         bpp = 16;
 165         break;
 166
 167     default:
 168         /* Unsupported at the moment.  */
 169         return;
 170     }
 171
 172     /* Resolution */
 173     width = omap_lcd->width;
 174     if (width != surface_width(surface) ||
 175         omap_lcd->height != surface_height(surface)) {
 176         qemu_console_resize(omap_lcd->con,
 177                             omap_lcd->width, omap_lcd->height);
 178         surface = qemu_console_surface(omap_lcd->con);
 179         omap_lcd->invalidate = 1;
 180     }
 181
 182     if (omap_lcd->dma->current_frame == 0)
 183         size = omap_lcd->dma->src_f1_bottom - omap_lcd->dma->src_f1_top;
 184     else
 185         size = omap_lcd->dma->src_f2_bottom - omap_lcd->dma->src_f2_top;
 186
 187     if (frame_offset + ((width * omap_lcd->height * bpp) >> 3) > size + 2) {
 188         omap_lcd->sync_error = 1;
 189         omap_lcd_interrupts(omap_lcd);
 190         omap_lcd->enable = 0;
 191         return;
 192     }
 193
 194     /* Content */
 195     frame_base = omap_lcd->dma->phys_framebuffer[
 196             omap_lcd->dma->current_frame] + frame_offset;
 197     omap_lcd->dma->condition |= 1 << omap_lcd->dma->current_frame;
 198     if (omap_lcd->dma->interrupts & 1)
 199         qemu_irq_raise(omap_lcd->dma->irq);
 200     if (omap_lcd->dma->dual)
 201         omap_lcd->dma->current_frame ^= 1;
 202
 203     if (!surface_bits_per_pixel(surface)) {
 204         return;
 205     }
 206
 207     first = 0;
 208     height = omap_lcd->height;
 209     if (omap_lcd->subpanel & (1 << 31)) {
 210         if (omap_lcd->subpanel & (1 << 29))
 211             first = (omap_lcd->subpanel >> 16) & 0x3ff;
 212         else
 213             height = (omap_lcd->subpanel >> 16) & 0x3ff;
 214         /* TODO: fill the rest of the panel with DPD */
 215     }
 216
 217     step = width * bpp >> 3;
 218     linesize = surface_stride(surface);
 219     if (omap_lcd->invalidate) {
 220         framebuffer_update_memory_section(&omap_lcd->fbsection,
 221                                           omap_lcd->sysmem, frame_base,
 222                                           height, step);
 223     }
 224
 225     framebuffer_update_display(surface, &omap_lcd->fbsection,
 226                                width, height,
 227                                step, linesize, 0,
 228                                omap_lcd->invalidate,
 229                                draw_line, omap_lcd->palette,
 230                                &first, &last);
 231
 232     if (first >= 0) {
 233         dpy_gfx_update(omap_lcd->con, 0, first, width, last - first + 1);
 234     }
 235     omap_lcd->invalidate = 0;
 236 }
 237
 238 static void omap_invalidate_display(void *opaque) {
 239     struct omap_lcd_panel_s *omap_lcd = opaque;
 240     omap_lcd->invalidate = 1;
 241 }
 242
 243 static void omap_lcd_update(struct omap_lcd_panel_s *s) {
 244     if (!s->enable) {
 245         s->dma->current_frame = -1;
 246         s->sync_error = 0;
 247         if (s->plm != 1)
 248             s->frame_done = 1;
 249         omap_lcd_interrupts(s);
 250         return;
 251     }
 252
 253     if (s->dma->current_frame == -1) {
 254         s->frame_done = 0;
 255         s->palette_done = 0;
 256         s->dma->current_frame = 0;
 257     }
 258
 259     if (!s->dma->mpu->port[s->dma->src].addr_valid(s->dma->mpu,
 260                             s->dma->src_f1_top) ||
 261                     !s->dma->mpu->port[
 262                     s->dma->src].addr_valid(s->dma->mpu,
 263                             s->dma->src_f1_bottom) ||
 264                     (s->dma->dual &&
 265                      (!s->dma->mpu->port[
 266                       s->dma->src].addr_valid(s->dma->mpu,
 267                               s->dma->src_f2_top) ||
 268                       !s->dma->mpu->port[
 269                       s->dma->src].addr_valid(s->dma->mpu,
 270                               s->dma->src_f2_bottom)))) {
 271         s->dma->condition |= 1 << 2;
 272         if (s->dma->interrupts & (1 << 1))
 273             qemu_irq_raise(s->dma->irq);
 274         s->enable = 0;
 275         return;
 276     }
 277
 278     s->dma->phys_framebuffer[0] = s->dma->src_f1_top;
 279     s->dma->phys_framebuffer[1] = s->dma->src_f2_top;
 280
 281     if (s->plm != 2 && !s->palette_done) {
 282         cpu_physical_memory_read(
 283             s->dma->phys_framebuffer[s->dma->current_frame],
 284             (void *)s->palette, 0x200);
 285         s->palette_done = 1;
 286         omap_lcd_interrupts(s);
 287     }
 288 }
 289
 290 static uint64_t omap_lcdc_read(void *opaque, hwaddr addr,
 291                                unsigned size)
 292 {
 293     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 294
 295     switch (addr) {
 296     case 0x00:  /* LCD_CONTROL */
 297         return (s->tft << 23) | (s->plm << 20) |
 298                 (s->tft << 7) | (s->interrupts << 3) |
 299                 (s->mono << 1) | s->enable | s->ctrl | 0xfe000c34;
 300
 301     case 0x04:  /* LCD_TIMING0 */
 302         return (s->timing[0] << 10) | (s->width - 1) | 0x0000000f;
 303
 304     case 0x08:  /* LCD_TIMING1 */
 305         return (s->timing[1] << 10) | (s->height - 1);
 306
 307     case 0x0c:  /* LCD_TIMING2 */
 308         return s->timing[2] | 0xfc000000;
 309
 310     case 0x10:  /* LCD_STATUS */
 311         return (s->palette_done << 6) | (s->sync_error << 2) | s->frame_done;
 312
 313     case 0x14:  /* LCD_SUBPANEL */
 314         return s->subpanel;
 315
 316     default:
 317         break;
 318     }
 319     OMAP_BAD_REG(addr);
 320     return 0;
 321 }
 322
 323 static void omap_lcdc_write(void *opaque, hwaddr addr,
 324                             uint64_t value, unsigned size)
 325 {
 326     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 327
 328     switch (addr) {
 329     case 0x00:  /* LCD_CONTROL */
 330         s->plm = (value >> 20) & 3;
 331         s->tft = (value >> 7) & 1;
 332         s->interrupts = (value >> 3) & 3;
 333         s->mono = (value >> 1) & 1;
 334         s->ctrl = value & 0x01cff300;
 335         if (s->enable != (value & 1)) {
 336             s->enable = value & 1;
 337             omap_lcd_update(s);
 338         }
 339         break;
 340
 341     case 0x04:  /* LCD_TIMING0 */
 342         s->timing[0] = value >> 10;
 343         s->width = (value & 0x3ff) + 1;
 344         break;
 345
 346     case 0x08:  /* LCD_TIMING1 */
 347         s->timing[1] = value >> 10;
 348         s->height = (value & 0x3ff) + 1;
 349         break;
 350
 351     case 0x0c:  /* LCD_TIMING2 */
 352         s->timing[2] = value;
 353         break;
 354
 355     case 0x10:  /* LCD_STATUS */
 356         break;
 357
 358     case 0x14:  /* LCD_SUBPANEL */
 359         s->subpanel = value & 0xa1ffffff;
 360         break;
 361
 362     default:
 363         OMAP_BAD_REG(addr);
 364     }
 365 }
 366
 367 static const MemoryRegionOps omap_lcdc_ops = {
 368     .read = omap_lcdc_read,
 369     .write = omap_lcdc_write,
 370     .endianness = DEVICE_NATIVE_ENDIAN,
 371 };
 372
 373 void omap_lcdc_reset(struct omap_lcd_panel_s *s)
 374 {
 375     s->dma->current_frame = -1;
 376     s->plm = 0;
 377     s->tft = 0;
 378     s->mono = 0;
 379     s->enable = 0;
 380     s->width = 0;
 381     s->height = 0;
 382     s->interrupts = 0;
 383     s->timing[0] = 0;
 384     s->timing[1] = 0;
 385     s->timing[2] = 0;
 386     s->subpanel = 0;
 387     s->palette_done = 0;
 388     s->frame_done = 0;
 389     s->sync_error = 0;
 390     s->invalidate = 1;
 391     s->subpanel = 0;
 392     s->ctrl = 0;
 393 }
 394
 395 static const GraphicHwOps omap_ops = {
 396     .invalidate  = omap_invalidate_display,
 397     .gfx_update  = omap_update_display,
 398 };
 399
 400 struct omap_lcd_panel_s *omap_lcdc_init(MemoryRegion *sysmem,
 401                                         hwaddr base,
 402                                         qemu_irq irq,
 403                                         struct omap_dma_lcd_channel_s *dma,
 404                                         omap_clk clk)
 405 {
 406     struct omap_lcd_panel_s *s = g_new0(struct omap_lcd_panel_s, 1);
 407
 408     s->irq = irq;
 409     s->dma = dma;
 410     s->sysmem = sysmem;
 411     omap_lcdc_reset(s);
 412
 413     memory_region_init_io(&s->iomem, NULL, &omap_lcdc_ops, s, "omap.lcdc", 0x100);
 414     memory_region_add_subregion(sysmem, base, &s->iomem);
 415
 416     s->con = graphic_console_init(NULL, 0, &omap_ops, s);
 417
 418     return s;
 419 }