1 /* 2 * SSD0303 OLED controller with OSRAM Pictiva 96x16 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/i2c/i2c.h" 16 #include "migration/vmstate.h" 17 #include "qemu/module.h" 18 #include "ui/console.h" 19 20 //#define DEBUG_SSD0303 1 21 22 #ifdef DEBUG_SSD0303 23 #define DPRINTF(fmt, ...) \ 24 do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) 25 #define BADF(fmt, ...) \ 26 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) 27 #else 28 #define DPRINTF(fmt, ...) do {} while(0) 29 #define BADF(fmt, ...) \ 30 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) 31 #endif 32 33 /* Scaling factor for pixels. */ 34 #define MAGNIFY 4 35 36 enum ssd0303_mode 37 { 38 SSD0303_IDLE, 39 SSD0303_DATA, 40 SSD0303_CMD 41 }; 42 43 enum ssd0303_cmd { 44 SSD0303_CMD_NONE, 45 SSD0303_CMD_SKIP1 46 }; 47 48 #define TYPE_SSD0303 "ssd0303" 49 #define SSD0303(obj) OBJECT_CHECK(ssd0303_state, (obj), TYPE_SSD0303) 50 51 typedef struct { 52 I2CSlave parent_obj; 53 54 QemuConsole *con; 55 int row; 56 int col; 57 int start_line; 58 int mirror; 59 int flash; 60 int enabled; 61 int inverse; 62 int redraw; 63 enum ssd0303_mode mode; 64 enum ssd0303_cmd cmd_state; 65 uint8_t framebuffer[132*8]; 66 } ssd0303_state; 67 68 static uint8_t ssd0303_recv(I2CSlave *i2c) 69 { 70 BADF("Reads not implemented\n"); 71 return 0xff; 72 } 73 74 static int ssd0303_send(I2CSlave *i2c, uint8_t data) 75 { 76 ssd0303_state *s = SSD0303(i2c); 77 enum ssd0303_cmd old_cmd_state; 78 79 switch (s->mode) { 80 case SSD0303_IDLE: 81 DPRINTF("byte 0x%02x\n", data); 82 if (data == 0x80) 83 s->mode = SSD0303_CMD; 84 else if (data == 0x40) 85 s->mode = SSD0303_DATA; 86 else 87 BADF("Unexpected byte 0x%x\n", data); 88 break; 89 case SSD0303_DATA: 90 DPRINTF("data 0x%02x\n", data); 91 if (s->col < 132) { 92 s->framebuffer[s->col + s->row * 132] = data; 93 s->col++; 94 s->redraw = 1; 95 } 96 break; 97 case SSD0303_CMD: 98 old_cmd_state = s->cmd_state; 99 s->cmd_state = SSD0303_CMD_NONE; 100 switch (old_cmd_state) { 101 case SSD0303_CMD_NONE: 102 DPRINTF("cmd 0x%02x\n", data); 103 s->mode = SSD0303_IDLE; 104 switch (data) { 105 case 0x00 ... 0x0f: /* Set lower column address. */ 106 s->col = (s->col & 0xf0) | (data & 0xf); 107 break; 108 case 0x10 ... 0x20: /* Set higher column address. */ 109 s->col = (s->col & 0x0f) | ((data & 0xf) << 4); 110 break; 111 case 0x40 ... 0x7f: /* Set start line. */ 112 s->start_line = 0; 113 break; 114 case 0x81: /* Set contrast (Ignored). */ 115 s->cmd_state = SSD0303_CMD_SKIP1; 116 break; 117 case 0xa0: /* Mirror off. */ 118 s->mirror = 0; 119 break; 120 case 0xa1: /* Mirror off. */ 121 s->mirror = 1; 122 break; 123 case 0xa4: /* Entire display off. */ 124 s->flash = 0; 125 break; 126 case 0xa5: /* Entire display on. */ 127 s->flash = 1; 128 break; 129 case 0xa6: /* Inverse off. */ 130 s->inverse = 0; 131 break; 132 case 0xa7: /* Inverse on. */ 133 s->inverse = 1; 134 break; 135 case 0xa8: /* Set multiplied ratio (Ignored). */ 136 s->cmd_state = SSD0303_CMD_SKIP1; 137 break; 138 case 0xad: /* DC-DC power control. */ 139 s->cmd_state = SSD0303_CMD_SKIP1; 140 break; 141 case 0xae: /* Display off. */ 142 s->enabled = 0; 143 break; 144 case 0xaf: /* Display on. */ 145 s->enabled = 1; 146 break; 147 case 0xb0 ... 0xbf: /* Set Page address. */ 148 s->row = data & 7; 149 break; 150 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ 151 break; 152 case 0xd3: /* Set display offset (Ignored). */ 153 s->cmd_state = SSD0303_CMD_SKIP1; 154 break; 155 case 0xd5: /* Set display clock (Ignored). */ 156 s->cmd_state = SSD0303_CMD_SKIP1; 157 break; 158 case 0xd8: /* Set color and power mode (Ignored). */ 159 s->cmd_state = SSD0303_CMD_SKIP1; 160 break; 161 case 0xd9: /* Set pre-charge period (Ignored). */ 162 s->cmd_state = SSD0303_CMD_SKIP1; 163 break; 164 case 0xda: /* Set COM pin configuration (Ignored). */ 165 s->cmd_state = SSD0303_CMD_SKIP1; 166 break; 167 case 0xdb: /* Set VCOM dselect level (Ignored). */ 168 s->cmd_state = SSD0303_CMD_SKIP1; 169 break; 170 case 0xe3: /* no-op. */ 171 break; 172 default: 173 BADF("Unknown command: 0x%x\n", data); 174 } 175 break; 176 case SSD0303_CMD_SKIP1: 177 DPRINTF("skip 0x%02x\n", data); 178 break; 179 } 180 break; 181 } 182 return 0; 183 } 184 185 static int ssd0303_event(I2CSlave *i2c, enum i2c_event event) 186 { 187 ssd0303_state *s = SSD0303(i2c); 188 189 switch (event) { 190 case I2C_FINISH: 191 s->mode = SSD0303_IDLE; 192 break; 193 case I2C_START_RECV: 194 case I2C_START_SEND: 195 case I2C_NACK: 196 /* Nothing to do. */ 197 break; 198 } 199 200 return 0; 201 } 202 203 static void ssd0303_update_display(void *opaque) 204 { 205 ssd0303_state *s = (ssd0303_state *)opaque; 206 DisplaySurface *surface = qemu_console_surface(s->con); 207 uint8_t *dest; 208 uint8_t *src; 209 int x; 210 int y; 211 int line; 212 char *colors[2]; 213 char colortab[MAGNIFY * 8]; 214 int dest_width; 215 uint8_t mask; 216 217 if (!s->redraw) 218 return; 219 220 switch (surface_bits_per_pixel(surface)) { 221 case 0: 222 return; 223 case 15: 224 dest_width = 2; 225 break; 226 case 16: 227 dest_width = 2; 228 break; 229 case 24: 230 dest_width = 3; 231 break; 232 case 32: 233 dest_width = 4; 234 break; 235 default: 236 BADF("Bad color depth\n"); 237 return; 238 } 239 dest_width *= MAGNIFY; 240 memset(colortab, 0xff, dest_width); 241 memset(colortab + dest_width, 0, dest_width); 242 if (s->flash) { 243 colors[0] = colortab; 244 colors[1] = colortab; 245 } else if (s->inverse) { 246 colors[0] = colortab; 247 colors[1] = colortab + dest_width; 248 } else { 249 colors[0] = colortab + dest_width; 250 colors[1] = colortab; 251 } 252 dest = surface_data(surface); 253 for (y = 0; y < 16; y++) { 254 line = (y + s->start_line) & 63; 255 src = s->framebuffer + 132 * (line >> 3) + 36; 256 mask = 1 << (line & 7); 257 for (x = 0; x < 96; x++) { 258 memcpy(dest, colors[(*src & mask) != 0], dest_width); 259 dest += dest_width; 260 src++; 261 } 262 for (x = 1; x < MAGNIFY; x++) { 263 memcpy(dest, dest - dest_width * 96, dest_width * 96); 264 dest += dest_width * 96; 265 } 266 } 267 s->redraw = 0; 268 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); 269 } 270 271 static void ssd0303_invalidate_display(void * opaque) 272 { 273 ssd0303_state *s = (ssd0303_state *)opaque; 274 s->redraw = 1; 275 } 276 277 static const VMStateDescription vmstate_ssd0303 = { 278 .name = "ssd0303_oled", 279 .version_id = 1, 280 .minimum_version_id = 1, 281 .fields = (VMStateField[]) { 282 VMSTATE_INT32(row, ssd0303_state), 283 VMSTATE_INT32(col, ssd0303_state), 284 VMSTATE_INT32(start_line, ssd0303_state), 285 VMSTATE_INT32(mirror, ssd0303_state), 286 VMSTATE_INT32(flash, ssd0303_state), 287 VMSTATE_INT32(enabled, ssd0303_state), 288 VMSTATE_INT32(inverse, ssd0303_state), 289 VMSTATE_INT32(redraw, ssd0303_state), 290 VMSTATE_UINT32(mode, ssd0303_state), 291 VMSTATE_UINT32(cmd_state, ssd0303_state), 292 VMSTATE_BUFFER(framebuffer, ssd0303_state), 293 VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state), 294 VMSTATE_END_OF_LIST() 295 } 296 }; 297 298 static const GraphicHwOps ssd0303_ops = { 299 .invalidate = ssd0303_invalidate_display, 300 .gfx_update = ssd0303_update_display, 301 }; 302 303 static void ssd0303_realize(DeviceState *dev, Error **errp) 304 { 305 ssd0303_state *s = SSD0303(dev); 306 307 s->con = graphic_console_init(dev, 0, &ssd0303_ops, s); 308 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); 309 } 310 311 static void ssd0303_class_init(ObjectClass *klass, void *data) 312 { 313 DeviceClass *dc = DEVICE_CLASS(klass); 314 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); 315 316 dc->realize = ssd0303_realize; 317 k->event = ssd0303_event; 318 k->recv = ssd0303_recv; 319 k->send = ssd0303_send; 320 dc->vmsd = &vmstate_ssd0303; 321 } 322 323 static const TypeInfo ssd0303_info = { 324 .name = TYPE_SSD0303, 325 .parent = TYPE_I2C_SLAVE, 326 .instance_size = sizeof(ssd0303_state), 327 .class_init = ssd0303_class_init, 328 }; 329 330 static void ssd0303_register_types(void) 331 { 332 type_register_static(&ssd0303_info); 333 } 334 335 type_init(ssd0303_register_types) 336