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     qemu_irq irq;
  29     QemuConsole *con;
  30
  31     int plm;
  32     int tft;
  33     int mono;
  34     int enable;
  35     int width;
  36     int height;
  37     int interrupts;
  38     uint32_t timing[3];
  39     uint32_t subpanel;
  40     uint32_t ctrl;
  41
  42     struct omap_dma_lcd_channel_s *dma;
  43     uint16_t palette[256];
  44     int palette_done;
  45     int frame_done;
  46     int invalidate;
  47     int sync_error;
  48 };
  49
  50 static void omap_lcd_interrupts(struct omap_lcd_panel_s *s)
  51 {
  52     if (s->frame_done && (s->interrupts & 1)) {
  53         qemu_irq_raise(s->irq);
  54         return;
  55     }
  56
  57     if (s->palette_done && (s->interrupts & 2)) {
  58         qemu_irq_raise(s->irq);
  59         return;
  60     }
  61
  62     if (s->sync_error) {
  63         qemu_irq_raise(s->irq);
  64         return;
  65     }
  66
  67     qemu_irq_lower(s->irq);
  68 }
  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     DisplaySurface *surface = qemu_console_surface(omap_lcd->con);
 117     draw_line_func draw_line;
 118     int size, height, first, last;
 119     int width, linesize, step, bpp, frame_offset;
 120     hwaddr frame_base;
 121
 122     if (!omap_lcd || omap_lcd->plm == 1 || !omap_lcd->enable ||
 123         !surface_bits_per_pixel(surface)) {
 124         return;
 125     }
 126
 127     frame_offset = 0;
 128     if (omap_lcd->plm != 2) {
 129         cpu_physical_memory_read(omap_lcd->dma->phys_framebuffer[
 130                                   omap_lcd->dma->current_frame],
 131                                  (void *)omap_lcd->palette, 0x200);
 132         switch (omap_lcd->palette[0] >> 12 & 7) {
 133         case 3 ... 7:
 134             frame_offset += 0x200;
 135             break;
 136         default:
 137             frame_offset += 0x20;
 138         }
 139     }
 140
 141     /* Colour depth */
 142     switch ((omap_lcd->palette[0] >> 12) & 7) {
 143     case 1:
 144         draw_line = draw_line_table2[surface_bits_per_pixel(surface)];
 145         bpp = 2;
 146         break;
 147
 148     case 2:
 149         draw_line = draw_line_table4[surface_bits_per_pixel(surface)];
 150         bpp = 4;
 151         break;
 152
 153     case 3:
 154         draw_line = draw_line_table8[surface_bits_per_pixel(surface)];
 155         bpp = 8;
 156         break;
 157
 158     case 4 ... 7:
 159         if (!omap_lcd->tft)
 160             draw_line = draw_line_table12[surface_bits_per_pixel(surface)];
 161         else
 162             draw_line = draw_line_table16[surface_bits_per_pixel(surface)];
 163         bpp = 16;
 164         break;
 165
 166     default:
 167         /* Unsupported at the moment.  */
 168         return;
 169     }
 170
 171     /* Resolution */
 172     width = omap_lcd->width;
 173     if (width != surface_width(surface) ||
 174         omap_lcd->height != surface_height(surface)) {
 175         qemu_console_resize(omap_lcd->con,
 176                             omap_lcd->width, omap_lcd->height);
 177         surface = qemu_console_surface(omap_lcd->con);
 178         omap_lcd->invalidate = 1;
 179     }
 180
 181     if (omap_lcd->dma->current_frame == 0)
 182         size = omap_lcd->dma->src_f1_bottom - omap_lcd->dma->src_f1_top;
 183     else
 184         size = omap_lcd->dma->src_f2_bottom - omap_lcd->dma->src_f2_top;
 185
 186     if (frame_offset + ((width * omap_lcd->height * bpp) >> 3) > size + 2) {
 187         omap_lcd->sync_error = 1;
 188         omap_lcd_interrupts(omap_lcd);
 189         omap_lcd->enable = 0;
 190         return;
 191     }
 192
 193     /* Content */
 194     frame_base = omap_lcd->dma->phys_framebuffer[
 195             omap_lcd->dma->current_frame] + frame_offset;
 196     omap_lcd->dma->condition |= 1 << omap_lcd->dma->current_frame;
 197     if (omap_lcd->dma->interrupts & 1)
 198         qemu_irq_raise(omap_lcd->dma->irq);
 199     if (omap_lcd->dma->dual)
 200         omap_lcd->dma->current_frame ^= 1;
 201
 202     if (!surface_bits_per_pixel(surface)) {
 203         return;
 204     }
 205
 206     first = 0;
 207     height = omap_lcd->height;
 208     if (omap_lcd->subpanel & (1 << 31)) {
 209         if (omap_lcd->subpanel & (1 << 29))
 210             first = (omap_lcd->subpanel >> 16) & 0x3ff;
 211         else
 212             height = (omap_lcd->subpanel >> 16) & 0x3ff;
 213         /* TODO: fill the rest of the panel with DPD */
 214     }
 215
 216     step = width * bpp >> 3;
 217     linesize = surface_stride(surface);
 218     framebuffer_update_display(surface, omap_lcd->sysmem,
 219                                frame_base, width, height,
 220                                step, linesize, 0,
 221                                omap_lcd->invalidate,
 222                                draw_line, omap_lcd->palette,
 223                                &first, &last);
 224     if (first >= 0) {
 225         dpy_gfx_update(omap_lcd->con, 0, first, width, last - first + 1);
 226     }
 227     omap_lcd->invalidate = 0;
 228 }
 229
 230 static void omap_invalidate_display(void *opaque) {
 231     struct omap_lcd_panel_s *omap_lcd = opaque;
 232     omap_lcd->invalidate = 1;
 233 }
 234
 235 static void omap_lcd_update(struct omap_lcd_panel_s *s) {
 236     if (!s->enable) {
 237         s->dma->current_frame = -1;
 238         s->sync_error = 0;
 239         if (s->plm != 1)
 240             s->frame_done = 1;
 241         omap_lcd_interrupts(s);
 242         return;
 243     }
 244
 245     if (s->dma->current_frame == -1) {
 246         s->frame_done = 0;
 247         s->palette_done = 0;
 248         s->dma->current_frame = 0;
 249     }
 250
 251     if (!s->dma->mpu->port[s->dma->src].addr_valid(s->dma->mpu,
 252                             s->dma->src_f1_top) ||
 253                     !s->dma->mpu->port[
 254                     s->dma->src].addr_valid(s->dma->mpu,
 255                             s->dma->src_f1_bottom) ||
 256                     (s->dma->dual &&
 257                      (!s->dma->mpu->port[
 258                       s->dma->src].addr_valid(s->dma->mpu,
 259                               s->dma->src_f2_top) ||
 260                       !s->dma->mpu->port[
 261                       s->dma->src].addr_valid(s->dma->mpu,
 262                               s->dma->src_f2_bottom)))) {
 263         s->dma->condition |= 1 << 2;
 264         if (s->dma->interrupts & (1 << 1))
 265             qemu_irq_raise(s->dma->irq);
 266         s->enable = 0;
 267         return;
 268     }
 269
 270     s->dma->phys_framebuffer[0] = s->dma->src_f1_top;
 271     s->dma->phys_framebuffer[1] = s->dma->src_f2_top;
 272
 273     if (s->plm != 2 && !s->palette_done) {
 274         cpu_physical_memory_read(
 275             s->dma->phys_framebuffer[s->dma->current_frame],
 276             (void *)s->palette, 0x200);
 277         s->palette_done = 1;
 278         omap_lcd_interrupts(s);
 279     }
 280 }
 281
 282 static uint64_t omap_lcdc_read(void *opaque, hwaddr addr,
 283                                unsigned size)
 284 {
 285     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 286
 287     switch (addr) {
 288     case 0x00:  /* LCD_CONTROL */
 289         return (s->tft << 23) | (s->plm << 20) |
 290                 (s->tft << 7) | (s->interrupts << 3) |
 291                 (s->mono << 1) | s->enable | s->ctrl | 0xfe000c34;
 292
 293     case 0x04:  /* LCD_TIMING0 */
 294         return (s->timing[0] << 10) | (s->width - 1) | 0x0000000f;
 295
 296     case 0x08:  /* LCD_TIMING1 */
 297         return (s->timing[1] << 10) | (s->height - 1);
 298
 299     case 0x0c:  /* LCD_TIMING2 */
 300         return s->timing[2] | 0xfc000000;
 301
 302     case 0x10:  /* LCD_STATUS */
 303         return (s->palette_done << 6) | (s->sync_error << 2) | s->frame_done;
 304
 305     case 0x14:  /* LCD_SUBPANEL */
 306         return s->subpanel;
 307
 308     default:
 309         break;
 310     }
 311     OMAP_BAD_REG(addr);
 312     return 0;
 313 }
 314
 315 static void omap_lcdc_write(void *opaque, hwaddr addr,
 316                             uint64_t value, unsigned size)
 317 {
 318     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *) opaque;
 319
 320     switch (addr) {
 321     case 0x00:  /* LCD_CONTROL */
 322         s->plm = (value >> 20) & 3;
 323         s->tft = (value >> 7) & 1;
 324         s->interrupts = (value >> 3) & 3;
 325         s->mono = (value >> 1) & 1;
 326         s->ctrl = value & 0x01cff300;
 327         if (s->enable != (value & 1)) {
 328             s->enable = value & 1;
 329             omap_lcd_update(s);
 330         }
 331         break;
 332
 333     case 0x04:  /* LCD_TIMING0 */
 334         s->timing[0] = value >> 10;
 335         s->width = (value & 0x3ff) + 1;
 336         break;
 337
 338     case 0x08:  /* LCD_TIMING1 */
 339         s->timing[1] = value >> 10;
 340         s->height = (value & 0x3ff) + 1;
 341         break;
 342
 343     case 0x0c:  /* LCD_TIMING2 */
 344         s->timing[2] = value;
 345         break;
 346
 347     case 0x10:  /* LCD_STATUS */
 348         break;
 349
 350     case 0x14:  /* LCD_SUBPANEL */
 351         s->subpanel = value & 0xa1ffffff;
 352         break;
 353
 354     default:
 355         OMAP_BAD_REG(addr);
 356     }
 357 }
 358
 359 static const MemoryRegionOps omap_lcdc_ops = {
 360     .read = omap_lcdc_read,
 361     .write = omap_lcdc_write,
 362     .endianness = DEVICE_NATIVE_ENDIAN,
 363 };
 364
 365 void omap_lcdc_reset(struct omap_lcd_panel_s *s)
 366 {
 367     s->dma->current_frame = -1;
 368     s->plm = 0;
 369     s->tft = 0;
 370     s->mono = 0;
 371     s->enable = 0;
 372     s->width = 0;
 373     s->height = 0;
 374     s->interrupts = 0;
 375     s->timing[0] = 0;
 376     s->timing[1] = 0;
 377     s->timing[2] = 0;
 378     s->subpanel = 0;
 379     s->palette_done = 0;
 380     s->frame_done = 0;
 381     s->sync_error = 0;
 382     s->invalidate = 1;
 383     s->subpanel = 0;
 384     s->ctrl = 0;
 385 }
 386
 387 static const GraphicHwOps omap_ops = {
 388     .invalidate  = omap_invalidate_display,
 389     .gfx_update  = omap_update_display,
 390 };
 391
 392 struct omap_lcd_panel_s *omap_lcdc_init(MemoryRegion *sysmem,
 393                                         hwaddr base,
 394                                         qemu_irq irq,
 395                                         struct omap_dma_lcd_channel_s *dma,
 396                                         omap_clk clk)
 397 {
 398     struct omap_lcd_panel_s *s = (struct omap_lcd_panel_s *)
 399             g_malloc0(sizeof(struct omap_lcd_panel_s));
 400
 401     s->irq = irq;
 402     s->dma = dma;
 403     s->sysmem = sysmem;
 404     omap_lcdc_reset(s);
 405
 406     memory_region_init_io(&s->iomem, NULL, &omap_lcdc_ops, s, "omap.lcdc", 0x100);
 407     memory_region_add_subregion(sysmem, base, &s->iomem);
 408
 409     s->con = graphic_console_init(NULL, 0, &omap_ops, s);
 410
 411     return s;
 412 }