hw/display/ssd0323.c

   1 /*
   2  * SSD0323 OLED controller with OSRAM Pictiva 128x64 display.
   3  *
   4  * Copyright (c) 2006-2007 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GPL.
   8  */
   9
  10 /* The controller can support a variety of different displays, but we only
  11    implement one.  Most of the commends relating to brightness and geometry
  12    setup are ignored. */
  13
  14 #include "qemu/osdep.h"
  15 #include "hw/ssi/ssi.h"
  16 #include "migration/vmstate.h"
  17 #include "qemu/module.h"
  18 #include "ui/console.h"
  19 #include "qom/object.h"
  20
  21 //#define DEBUG_SSD0323 1
  22
  23 #ifdef DEBUG_SSD0323
  24 #define DPRINTF(fmt, ...) \
  25 do { printf("ssd0323: " fmt , ## __VA_ARGS__); } while (0)
  26 #define BADF(fmt, ...) \
  27 do { \
  28     fprintf(stderr, "ssd0323: error: " fmt , ## __VA_ARGS__); abort(); \
  29 } while (0)
  30 #else
  31 #define DPRINTF(fmt, ...) do {} while(0)
  32 #define BADF(fmt, ...) \
  33 do { fprintf(stderr, "ssd0323: error: " fmt , ## __VA_ARGS__);} while (0)
  34 #endif
  35
  36 /* Scaling factor for pixels.  */
  37 #define MAGNIFY 4
  38
  39 #define REMAP_SWAP_COLUMN 0x01
  40 #define REMAP_SWAP_NYBBLE 0x02
  41 #define REMAP_VERTICAL    0x04
  42 #define REMAP_SWAP_COM    0x10
  43 #define REMAP_SPLIT_COM   0x40
  44
  45 enum ssd0323_mode
  46 {
  47     SSD0323_CMD,
  48     SSD0323_DATA
  49 };
  50
  51 struct ssd0323_state {
  52     SSIPeripheral ssidev;
  53     QemuConsole *con;
  54
  55     uint32_t cmd_len;
  56     int32_t cmd;
  57     int32_t cmd_data[8];
  58     int32_t row;
  59     int32_t row_start;
  60     int32_t row_end;
  61     int32_t col;
  62     int32_t col_start;
  63     int32_t col_end;
  64     int32_t redraw;
  65     int32_t remap;
  66     uint32_t mode;
  67     uint8_t framebuffer[128 * 80 / 2];
  68 };
  69
  70 #define TYPE_SSD0323 "ssd0323"
  71 OBJECT_DECLARE_SIMPLE_TYPE(ssd0323_state, SSD0323)
  72
  73
  74 static uint32_t ssd0323_transfer(SSIPeripheral *dev, uint32_t data)
  75 {
  76     ssd0323_state *s = SSD0323(dev);
  77
  78     switch (s->mode) {
  79     case SSD0323_DATA:
  80         DPRINTF("data 0x%02x\n", data);
  81         s->framebuffer[s->col + s->row * 64] = data;
  82         if (s->remap & REMAP_VERTICAL) {
  83             s->row++;
  84             if (s->row > s->row_end) {
  85                 s->row = s->row_start;
  86                 s->col++;
  87             }
  88             if (s->col > s->col_end) {
  89                 s->col = s->col_start;
  90             }
  91         } else {
  92             s->col++;
  93             if (s->col > s->col_end) {
  94                 s->row++;
  95                 s->col = s->col_start;
  96             }
  97             if (s->row > s->row_end) {
  98                 s->row = s->row_start;
  99             }
 100         }
 101         s->redraw = 1;
 102         break;
 103     case SSD0323_CMD:
 104         DPRINTF("cmd 0x%02x\n", data);
 105         if (s->cmd_len == 0) {
 106             s->cmd = data;
 107         } else {
 108             s->cmd_data[s->cmd_len - 1] = data;
 109         }
 110         s->cmd_len++;
 111         switch (s->cmd) {
 112 #define DATA(x) if (s->cmd_len <= (x)) return 0
 113         case 0x15: /* Set column.  */
 114             DATA(2);
 115             s->col = s->col_start = s->cmd_data[0] % 64;
 116             s->col_end = s->cmd_data[1] % 64;
 117             break;
 118         case 0x75: /* Set row.  */
 119             DATA(2);
 120             s->row = s->row_start = s->cmd_data[0] % 80;
 121             s->row_end = s->cmd_data[1] % 80;
 122             break;
 123         case 0x81: /* Set contrast */
 124             DATA(1);
 125             break;
 126         case 0x84: case 0x85: case 0x86: /* Max current.  */
 127             DATA(0);
 128             break;
 129         case 0xa0: /* Set remapping.  */
 130             /* FIXME: Implement this.  */
 131             DATA(1);
 132             s->remap = s->cmd_data[0];
 133             break;
 134         case 0xa1: /* Set display start line.  */
 135         case 0xa2: /* Set display offset.  */
 136             /* FIXME: Implement these.  */
 137             DATA(1);
 138             break;
 139         case 0xa4: /* Normal mode.  */
 140         case 0xa5: /* All on.  */
 141         case 0xa6: /* All off.  */
 142         case 0xa7: /* Inverse.  */
 143             /* FIXME: Implement these.  */
 144             DATA(0);
 145             break;
 146         case 0xa8: /* Set multiplex ratio.  */
 147         case 0xad: /* Set DC-DC converter.  */
 148             DATA(1);
 149             /* Ignored.  Don't care.  */
 150             break;
 151         case 0xae: /* Display off.  */
 152         case 0xaf: /* Display on.  */
 153             DATA(0);
 154             /* TODO: Implement power control.  */
 155             break;
 156         case 0xb1: /* Set phase length.  */
 157         case 0xb2: /* Set row period.  */
 158         case 0xb3: /* Set clock rate.  */
 159         case 0xbc: /* Set precharge.  */
 160         case 0xbe: /* Set VCOMH.  */
 161         case 0xbf: /* Set segment low.  */
 162             DATA(1);
 163             /* Ignored.  Don't care.  */
 164             break;
 165         case 0xb8: /* Set grey scale table.  */
 166             /* FIXME: Implement this.  */
 167             DATA(8);
 168             break;
 169         case 0xe3: /* NOP.  */
 170             DATA(0);
 171             break;
 172         case 0xff: /* Nasty hack because we don't handle chip selects
 173                       properly.  */
 174             break;
 175         default:
 176             BADF("Unknown command: 0x%x\n", data);
 177         }
 178         s->cmd_len = 0;
 179         return 0;
 180     }
 181     return 0;
 182 }
 183
 184 static void ssd0323_update_display(void *opaque)
 185 {
 186     ssd0323_state *s = (ssd0323_state *)opaque;
 187     DisplaySurface *surface = qemu_console_surface(s->con);
 188     uint8_t *dest;
 189     uint8_t *src;
 190     int x;
 191     int y;
 192     int i;
 193     int line;
 194     char *colors[16];
 195     char colortab[MAGNIFY * 64];
 196     char *p;
 197     int dest_width;
 198
 199     if (!s->redraw)
 200         return;
 201
 202     switch (surface_bits_per_pixel(surface)) {
 203     case 0:
 204         return;
 205     case 15:
 206         dest_width = 2;
 207         break;
 208     case 16:
 209         dest_width = 2;
 210         break;
 211     case 24:
 212         dest_width = 3;
 213         break;
 214     case 32:
 215         dest_width = 4;
 216         break;
 217     default:
 218         BADF("Bad color depth\n");
 219         return;
 220     }
 221     p = colortab;
 222     for (i = 0; i < 16; i++) {
 223         int n;
 224         colors[i] = p;
 225         switch (surface_bits_per_pixel(surface)) {
 226         case 15:
 227             n = i * 2 + (i >> 3);
 228             p[0] = n | (n << 5);
 229             p[1] = (n << 2) | (n >> 3);
 230             break;
 231         case 16:
 232             n = i * 2 + (i >> 3);
 233             p[0] = n | (n << 6) | ((n << 1) & 0x20);
 234             p[1] = (n << 3) | (n >> 2);
 235             break;
 236         case 24:
 237         case 32:
 238             n = (i << 4) | i;
 239             p[0] = p[1] = p[2] = n;
 240             break;
 241         default:
 242             BADF("Bad color depth\n");
 243             return;
 244         }
 245         p += dest_width;
 246     }
 247     /* TODO: Implement row/column remapping.  */
 248     dest = surface_data(surface);
 249     for (y = 0; y < 64; y++) {
 250         line = y;
 251         src = s->framebuffer + 64 * line;
 252         for (x = 0; x < 64; x++) {
 253             int val;
 254             val = *src >> 4;
 255             for (i = 0; i < MAGNIFY; i++) {
 256                 memcpy(dest, colors[val], dest_width);
 257                 dest += dest_width;
 258             }
 259             val = *src & 0xf;
 260             for (i = 0; i < MAGNIFY; i++) {
 261                 memcpy(dest, colors[val], dest_width);
 262                 dest += dest_width;
 263             }
 264             src++;
 265         }
 266         for (i = 1; i < MAGNIFY; i++) {
 267             memcpy(dest, dest - dest_width * MAGNIFY * 128,
 268                    dest_width * 128 * MAGNIFY);
 269             dest += dest_width * 128 * MAGNIFY;
 270         }
 271     }
 272     s->redraw = 0;
 273     dpy_gfx_update(s->con, 0, 0, 128 * MAGNIFY, 64 * MAGNIFY);
 274 }
 275
 276 static void ssd0323_invalidate_display(void * opaque)
 277 {
 278     ssd0323_state *s = (ssd0323_state *)opaque;
 279     s->redraw = 1;
 280 }
 281
 282 /* Command/data input.  */
 283 static void ssd0323_cd(void *opaque, int n, int level)
 284 {
 285     ssd0323_state *s = (ssd0323_state *)opaque;
 286     DPRINTF("%s mode\n", level ? "Data" : "Command");
 287     s->mode = level ? SSD0323_DATA : SSD0323_CMD;
 288 }
 289
 290 static int ssd0323_post_load(void *opaque, int version_id)
 291 {
 292     ssd0323_state *s = (ssd0323_state *)opaque;
 293
 294     if (s->cmd_len > ARRAY_SIZE(s->cmd_data)) {
 295         return -EINVAL;
 296     }
 297     if (s->row < 0 || s->row >= 80) {
 298         return -EINVAL;
 299     }
 300     if (s->row_start < 0 || s->row_start >= 80) {
 301         return -EINVAL;
 302     }
 303     if (s->row_end < 0 || s->row_end >= 80) {
 304         return -EINVAL;
 305     }
 306     if (s->col < 0 || s->col >= 64) {
 307         return -EINVAL;
 308     }
 309     if (s->col_start < 0 || s->col_start >= 64) {
 310         return -EINVAL;
 311     }
 312     if (s->col_end < 0 || s->col_end >= 64) {
 313         return -EINVAL;
 314     }
 315     if (s->mode != SSD0323_CMD && s->mode != SSD0323_DATA) {
 316         return -EINVAL;
 317     }
 318
 319     return 0;
 320 }
 321
 322 static const VMStateDescription vmstate_ssd0323 = {
 323     .name = "ssd0323_oled",
 324     .version_id = 2,
 325     .minimum_version_id = 2,
 326     .post_load = ssd0323_post_load,
 327     .fields      = (VMStateField []) {
 328         VMSTATE_UINT32(cmd_len, ssd0323_state),
 329         VMSTATE_INT32(cmd, ssd0323_state),
 330         VMSTATE_INT32_ARRAY(cmd_data, ssd0323_state, 8),
 331         VMSTATE_INT32(row, ssd0323_state),
 332         VMSTATE_INT32(row_start, ssd0323_state),
 333         VMSTATE_INT32(row_end, ssd0323_state),
 334         VMSTATE_INT32(col, ssd0323_state),
 335         VMSTATE_INT32(col_start, ssd0323_state),
 336         VMSTATE_INT32(col_end, ssd0323_state),
 337         VMSTATE_INT32(redraw, ssd0323_state),
 338         VMSTATE_INT32(remap, ssd0323_state),
 339         VMSTATE_UINT32(mode, ssd0323_state),
 340         VMSTATE_BUFFER(framebuffer, ssd0323_state),
 341         VMSTATE_SSI_PERIPHERAL(ssidev, ssd0323_state),
 342         VMSTATE_END_OF_LIST()
 343     }
 344 };
 345
 346 static const GraphicHwOps ssd0323_ops = {
 347     .invalidate  = ssd0323_invalidate_display,
 348     .gfx_update  = ssd0323_update_display,
 349 };
 350
 351 static void ssd0323_realize(SSIPeripheral *d, Error **errp)
 352 {
 353     DeviceState *dev = DEVICE(d);
 354     ssd0323_state *s = SSD0323(d);
 355
 356     s->col_end = 63;
 357     s->row_end = 79;
 358     s->con = graphic_console_init(dev, 0, &ssd0323_ops, s);
 359     qemu_console_resize(s->con, 128 * MAGNIFY, 64 * MAGNIFY);
 360
 361     qdev_init_gpio_in(dev, ssd0323_cd, 1);
 362 }
 363
 364 static void ssd0323_class_init(ObjectClass *klass, void *data)
 365 {
 366     DeviceClass *dc = DEVICE_CLASS(klass);
 367     SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
 368
 369     k->realize = ssd0323_realize;
 370     k->transfer = ssd0323_transfer;
 371     k->cs_polarity = SSI_CS_HIGH;
 372     dc->vmsd = &vmstate_ssd0323;
 373     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 374 }
 375
 376 static const TypeInfo ssd0323_info = {
 377     .name          = TYPE_SSD0323,
 378     .parent        = TYPE_SSI_PERIPHERAL,
 379     .instance_size = sizeof(ssd0323_state),
 380     .class_init    = ssd0323_class_init,
 381 };
 382
 383 static void ssd03232_register_types(void)
 384 {
 385     type_register_static(&ssd0323_info);
 386 }
 387
 388 type_init(ssd03232_register_types)