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 #include "hw/i2c/i2c.h" 14 #include "ui/console.h" 15 16 //#define DEBUG_SSD0303 1 17 18 #ifdef DEBUG_SSD0303 19 #define DPRINTF(fmt, ...) \ 20 do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) 21 #define BADF(fmt, ...) \ 22 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) 23 #else 24 #define DPRINTF(fmt, ...) do {} while(0) 25 #define BADF(fmt, ...) \ 26 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) 27 #endif 28 29 /* Scaling factor for pixels. */ 30 #define MAGNIFY 4 31 32 enum ssd0303_mode 33 { 34 SSD0303_IDLE, 35 SSD0303_DATA, 36 SSD0303_CMD 37 }; 38 39 enum ssd0303_cmd { 40 SSD0303_CMD_NONE, 41 SSD0303_CMD_SKIP1 42 }; 43 44 #define TYPE_SSD0303 "ssd0303" 45 #define SSD0303(obj) OBJECT_CHECK(ssd0303_state, (obj), TYPE_SSD0303) 46 47 typedef struct { 48 I2CSlave parent_obj; 49 50 QemuConsole *con; 51 int row; 52 int col; 53 int start_line; 54 int mirror; 55 int flash; 56 int enabled; 57 int inverse; 58 int redraw; 59 enum ssd0303_mode mode; 60 enum ssd0303_cmd cmd_state; 61 uint8_t framebuffer[132*8]; 62 } ssd0303_state; 63 64 static int ssd0303_recv(I2CSlave *i2c) 65 { 66 BADF("Reads not implemented\n"); 67 return -1; 68 } 69 70 static int ssd0303_send(I2CSlave *i2c, uint8_t data) 71 { 72 ssd0303_state *s = SSD0303(i2c); 73 enum ssd0303_cmd old_cmd_state; 74 75 switch (s->mode) { 76 case SSD0303_IDLE: 77 DPRINTF("byte 0x%02x\n", data); 78 if (data == 0x80) 79 s->mode = SSD0303_CMD; 80 else if (data == 0x40) 81 s->mode = SSD0303_DATA; 82 else 83 BADF("Unexpected byte 0x%x\n", data); 84 break; 85 case SSD0303_DATA: 86 DPRINTF("data 0x%02x\n", data); 87 if (s->col < 132) { 88 s->framebuffer[s->col + s->row * 132] = data; 89 s->col++; 90 s->redraw = 1; 91 } 92 break; 93 case SSD0303_CMD: 94 old_cmd_state = s->cmd_state; 95 s->cmd_state = SSD0303_CMD_NONE; 96 switch (old_cmd_state) { 97 case SSD0303_CMD_NONE: 98 DPRINTF("cmd 0x%02x\n", data); 99 s->mode = SSD0303_IDLE; 100 switch (data) { 101 case 0x00 ... 0x0f: /* Set lower column address. */ 102 s->col = (s->col & 0xf0) | (data & 0xf); 103 break; 104 case 0x10 ... 0x20: /* Set higher column address. */ 105 s->col = (s->col & 0x0f) | ((data & 0xf) << 4); 106 break; 107 case 0x40 ... 0x7f: /* Set start line. */ 108 s->start_line = 0; 109 break; 110 case 0x81: /* Set contrast (Ignored). */ 111 s->cmd_state = SSD0303_CMD_SKIP1; 112 break; 113 case 0xa0: /* Mirror off. */ 114 s->mirror = 0; 115 break; 116 case 0xa1: /* Mirror off. */ 117 s->mirror = 1; 118 break; 119 case 0xa4: /* Entire display off. */ 120 s->flash = 0; 121 break; 122 case 0xa5: /* Entire display on. */ 123 s->flash = 1; 124 break; 125 case 0xa6: /* Inverse off. */ 126 s->inverse = 0; 127 break; 128 case 0xa7: /* Inverse on. */ 129 s->inverse = 1; 130 break; 131 case 0xa8: /* Set multiplied ratio (Ignored). */ 132 s->cmd_state = SSD0303_CMD_SKIP1; 133 break; 134 case 0xad: /* DC-DC power control. */ 135 s->cmd_state = SSD0303_CMD_SKIP1; 136 break; 137 case 0xae: /* Display off. */ 138 s->enabled = 0; 139 break; 140 case 0xaf: /* Display on. */ 141 s->enabled = 1; 142 break; 143 case 0xb0 ... 0xbf: /* Set Page address. */ 144 s->row = data & 7; 145 break; 146 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ 147 break; 148 case 0xd3: /* Set display offset (Ignored). */ 149 s->cmd_state = SSD0303_CMD_SKIP1; 150 break; 151 case 0xd5: /* Set display clock (Ignored). */ 152 s->cmd_state = SSD0303_CMD_SKIP1; 153 break; 154 case 0xd8: /* Set color and power mode (Ignored). */ 155 s->cmd_state = SSD0303_CMD_SKIP1; 156 break; 157 case 0xd9: /* Set pre-charge period (Ignored). */ 158 s->cmd_state = SSD0303_CMD_SKIP1; 159 break; 160 case 0xda: /* Set COM pin configuration (Ignored). */ 161 s->cmd_state = SSD0303_CMD_SKIP1; 162 break; 163 case 0xdb: /* Set VCOM dselect level (Ignored). */ 164 s->cmd_state = SSD0303_CMD_SKIP1; 165 break; 166 case 0xe3: /* no-op. */ 167 break; 168 default: 169 BADF("Unknown command: 0x%x\n", data); 170 } 171 break; 172 case SSD0303_CMD_SKIP1: 173 DPRINTF("skip 0x%02x\n", data); 174 break; 175 } 176 break; 177 } 178 return 0; 179 } 180 181 static void ssd0303_event(I2CSlave *i2c, enum i2c_event event) 182 { 183 ssd0303_state *s = SSD0303(i2c); 184 185 switch (event) { 186 case I2C_FINISH: 187 s->mode = SSD0303_IDLE; 188 break; 189 case I2C_START_RECV: 190 case I2C_START_SEND: 191 case I2C_NACK: 192 /* Nothing to do. */ 193 break; 194 } 195 } 196 197 static void ssd0303_update_display(void *opaque) 198 { 199 ssd0303_state *s = (ssd0303_state *)opaque; 200 DisplaySurface *surface = qemu_console_surface(s->con); 201 uint8_t *dest; 202 uint8_t *src; 203 int x; 204 int y; 205 int line; 206 char *colors[2]; 207 char colortab[MAGNIFY * 8]; 208 int dest_width; 209 uint8_t mask; 210 211 if (!s->redraw) 212 return; 213 214 switch (surface_bits_per_pixel(surface)) { 215 case 0: 216 return; 217 case 15: 218 dest_width = 2; 219 break; 220 case 16: 221 dest_width = 2; 222 break; 223 case 24: 224 dest_width = 3; 225 break; 226 case 32: 227 dest_width = 4; 228 break; 229 default: 230 BADF("Bad color depth\n"); 231 return; 232 } 233 dest_width *= MAGNIFY; 234 memset(colortab, 0xff, dest_width); 235 memset(colortab + dest_width, 0, dest_width); 236 if (s->flash) { 237 colors[0] = colortab; 238 colors[1] = colortab; 239 } else if (s->inverse) { 240 colors[0] = colortab; 241 colors[1] = colortab + dest_width; 242 } else { 243 colors[0] = colortab + dest_width; 244 colors[1] = colortab; 245 } 246 dest = surface_data(surface); 247 for (y = 0; y < 16; y++) { 248 line = (y + s->start_line) & 63; 249 src = s->framebuffer + 132 * (line >> 3) + 36; 250 mask = 1 << (line & 7); 251 for (x = 0; x < 96; x++) { 252 memcpy(dest, colors[(*src & mask) != 0], dest_width); 253 dest += dest_width; 254 src++; 255 } 256 for (x = 1; x < MAGNIFY; x++) { 257 memcpy(dest, dest - dest_width * 96, dest_width * 96); 258 dest += dest_width * 96; 259 } 260 } 261 s->redraw = 0; 262 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); 263 } 264 265 static void ssd0303_invalidate_display(void * opaque) 266 { 267 ssd0303_state *s = (ssd0303_state *)opaque; 268 s->redraw = 1; 269 } 270 271 static const VMStateDescription vmstate_ssd0303 = { 272 .name = "ssd0303_oled", 273 .version_id = 1, 274 .minimum_version_id = 1, 275 .minimum_version_id_old = 1, 276 .fields = (VMStateField []) { 277 VMSTATE_INT32(row, ssd0303_state), 278 VMSTATE_INT32(col, ssd0303_state), 279 VMSTATE_INT32(start_line, ssd0303_state), 280 VMSTATE_INT32(mirror, ssd0303_state), 281 VMSTATE_INT32(flash, ssd0303_state), 282 VMSTATE_INT32(enabled, ssd0303_state), 283 VMSTATE_INT32(inverse, ssd0303_state), 284 VMSTATE_INT32(redraw, ssd0303_state), 285 VMSTATE_UINT32(mode, ssd0303_state), 286 VMSTATE_UINT32(cmd_state, ssd0303_state), 287 VMSTATE_BUFFER(framebuffer, ssd0303_state), 288 VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state), 289 VMSTATE_END_OF_LIST() 290 } 291 }; 292 293 static const GraphicHwOps ssd0303_ops = { 294 .invalidate = ssd0303_invalidate_display, 295 .gfx_update = ssd0303_update_display, 296 }; 297 298 static int ssd0303_init(I2CSlave *i2c) 299 { 300 ssd0303_state *s = SSD0303(i2c); 301 302 s->con = graphic_console_init(DEVICE(i2c), 0, &ssd0303_ops, s); 303 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); 304 return 0; 305 } 306 307 static void ssd0303_class_init(ObjectClass *klass, void *data) 308 { 309 DeviceClass *dc = DEVICE_CLASS(klass); 310 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); 311 312 k->init = ssd0303_init; 313 k->event = ssd0303_event; 314 k->recv = ssd0303_recv; 315 k->send = ssd0303_send; 316 dc->vmsd = &vmstate_ssd0303; 317 } 318 319 static const TypeInfo ssd0303_info = { 320 .name = TYPE_SSD0303, 321 .parent = TYPE_I2C_SLAVE, 322 .instance_size = sizeof(ssd0303_state), 323 .class_init = ssd0303_class_init, 324 }; 325 326 static void ssd0303_register_types(void) 327 { 328 type_register_static(&ssd0303_info); 329 } 330 331 type_init(ssd0303_register_types) 332