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 typedef struct { 45 I2CSlave i2c; 46 QemuConsole *con; 47 int row; 48 int col; 49 int start_line; 50 int mirror; 51 int flash; 52 int enabled; 53 int inverse; 54 int redraw; 55 enum ssd0303_mode mode; 56 enum ssd0303_cmd cmd_state; 57 uint8_t framebuffer[132*8]; 58 } ssd0303_state; 59 60 static int ssd0303_recv(I2CSlave *i2c) 61 { 62 BADF("Reads not implemented\n"); 63 return -1; 64 } 65 66 static int ssd0303_send(I2CSlave *i2c, uint8_t data) 67 { 68 ssd0303_state *s = (ssd0303_state *)i2c; 69 enum ssd0303_cmd old_cmd_state; 70 switch (s->mode) { 71 case SSD0303_IDLE: 72 DPRINTF("byte 0x%02x\n", data); 73 if (data == 0x80) 74 s->mode = SSD0303_CMD; 75 else if (data == 0x40) 76 s->mode = SSD0303_DATA; 77 else 78 BADF("Unexpected byte 0x%x\n", data); 79 break; 80 case SSD0303_DATA: 81 DPRINTF("data 0x%02x\n", data); 82 if (s->col < 132) { 83 s->framebuffer[s->col + s->row * 132] = data; 84 s->col++; 85 s->redraw = 1; 86 } 87 break; 88 case SSD0303_CMD: 89 old_cmd_state = s->cmd_state; 90 s->cmd_state = SSD0303_CMD_NONE; 91 switch (old_cmd_state) { 92 case SSD0303_CMD_NONE: 93 DPRINTF("cmd 0x%02x\n", data); 94 s->mode = SSD0303_IDLE; 95 switch (data) { 96 case 0x00 ... 0x0f: /* Set lower column address. */ 97 s->col = (s->col & 0xf0) | (data & 0xf); 98 break; 99 case 0x10 ... 0x20: /* Set higher column address. */ 100 s->col = (s->col & 0x0f) | ((data & 0xf) << 4); 101 break; 102 case 0x40 ... 0x7f: /* Set start line. */ 103 s->start_line = 0; 104 break; 105 case 0x81: /* Set contrast (Ignored). */ 106 s->cmd_state = SSD0303_CMD_SKIP1; 107 break; 108 case 0xa0: /* Mirror off. */ 109 s->mirror = 0; 110 break; 111 case 0xa1: /* Mirror off. */ 112 s->mirror = 1; 113 break; 114 case 0xa4: /* Entire display off. */ 115 s->flash = 0; 116 break; 117 case 0xa5: /* Entire display on. */ 118 s->flash = 1; 119 break; 120 case 0xa6: /* Inverse off. */ 121 s->inverse = 0; 122 break; 123 case 0xa7: /* Inverse on. */ 124 s->inverse = 1; 125 break; 126 case 0xa8: /* Set multiplied ratio (Ignored). */ 127 s->cmd_state = SSD0303_CMD_SKIP1; 128 break; 129 case 0xad: /* DC-DC power control. */ 130 s->cmd_state = SSD0303_CMD_SKIP1; 131 break; 132 case 0xae: /* Display off. */ 133 s->enabled = 0; 134 break; 135 case 0xaf: /* Display on. */ 136 s->enabled = 1; 137 break; 138 case 0xb0 ... 0xbf: /* Set Page address. */ 139 s->row = data & 7; 140 break; 141 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ 142 break; 143 case 0xd3: /* Set display offset (Ignored). */ 144 s->cmd_state = SSD0303_CMD_SKIP1; 145 break; 146 case 0xd5: /* Set display clock (Ignored). */ 147 s->cmd_state = SSD0303_CMD_SKIP1; 148 break; 149 case 0xd8: /* Set color and power mode (Ignored). */ 150 s->cmd_state = SSD0303_CMD_SKIP1; 151 break; 152 case 0xd9: /* Set pre-charge period (Ignored). */ 153 s->cmd_state = SSD0303_CMD_SKIP1; 154 break; 155 case 0xda: /* Set COM pin configuration (Ignored). */ 156 s->cmd_state = SSD0303_CMD_SKIP1; 157 break; 158 case 0xdb: /* Set VCOM dselect level (Ignored). */ 159 s->cmd_state = SSD0303_CMD_SKIP1; 160 break; 161 case 0xe3: /* no-op. */ 162 break; 163 default: 164 BADF("Unknown command: 0x%x\n", data); 165 } 166 break; 167 case SSD0303_CMD_SKIP1: 168 DPRINTF("skip 0x%02x\n", data); 169 break; 170 } 171 break; 172 } 173 return 0; 174 } 175 176 static void ssd0303_event(I2CSlave *i2c, enum i2c_event event) 177 { 178 ssd0303_state *s = (ssd0303_state *)i2c; 179 switch (event) { 180 case I2C_FINISH: 181 s->mode = SSD0303_IDLE; 182 break; 183 case I2C_START_RECV: 184 case I2C_START_SEND: 185 case I2C_NACK: 186 /* Nothing to do. */ 187 break; 188 } 189 } 190 191 static void ssd0303_update_display(void *opaque) 192 { 193 ssd0303_state *s = (ssd0303_state *)opaque; 194 DisplaySurface *surface = qemu_console_surface(s->con); 195 uint8_t *dest; 196 uint8_t *src; 197 int x; 198 int y; 199 int line; 200 char *colors[2]; 201 char colortab[MAGNIFY * 8]; 202 int dest_width; 203 uint8_t mask; 204 205 if (!s->redraw) 206 return; 207 208 switch (surface_bits_per_pixel(surface)) { 209 case 0: 210 return; 211 case 15: 212 dest_width = 2; 213 break; 214 case 16: 215 dest_width = 2; 216 break; 217 case 24: 218 dest_width = 3; 219 break; 220 case 32: 221 dest_width = 4; 222 break; 223 default: 224 BADF("Bad color depth\n"); 225 return; 226 } 227 dest_width *= MAGNIFY; 228 memset(colortab, 0xff, dest_width); 229 memset(colortab + dest_width, 0, dest_width); 230 if (s->flash) { 231 colors[0] = colortab; 232 colors[1] = colortab; 233 } else if (s->inverse) { 234 colors[0] = colortab; 235 colors[1] = colortab + dest_width; 236 } else { 237 colors[0] = colortab + dest_width; 238 colors[1] = colortab; 239 } 240 dest = surface_data(surface); 241 for (y = 0; y < 16; y++) { 242 line = (y + s->start_line) & 63; 243 src = s->framebuffer + 132 * (line >> 3) + 36; 244 mask = 1 << (line & 7); 245 for (x = 0; x < 96; x++) { 246 memcpy(dest, colors[(*src & mask) != 0], dest_width); 247 dest += dest_width; 248 src++; 249 } 250 for (x = 1; x < MAGNIFY; x++) { 251 memcpy(dest, dest - dest_width * 96, dest_width * 96); 252 dest += dest_width * 96; 253 } 254 } 255 s->redraw = 0; 256 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); 257 } 258 259 static void ssd0303_invalidate_display(void * opaque) 260 { 261 ssd0303_state *s = (ssd0303_state *)opaque; 262 s->redraw = 1; 263 } 264 265 static const VMStateDescription vmstate_ssd0303 = { 266 .name = "ssd0303_oled", 267 .version_id = 1, 268 .minimum_version_id = 1, 269 .minimum_version_id_old = 1, 270 .fields = (VMStateField []) { 271 VMSTATE_INT32(row, ssd0303_state), 272 VMSTATE_INT32(col, ssd0303_state), 273 VMSTATE_INT32(start_line, ssd0303_state), 274 VMSTATE_INT32(mirror, ssd0303_state), 275 VMSTATE_INT32(flash, ssd0303_state), 276 VMSTATE_INT32(enabled, ssd0303_state), 277 VMSTATE_INT32(inverse, ssd0303_state), 278 VMSTATE_INT32(redraw, ssd0303_state), 279 VMSTATE_UINT32(mode, ssd0303_state), 280 VMSTATE_UINT32(cmd_state, ssd0303_state), 281 VMSTATE_BUFFER(framebuffer, ssd0303_state), 282 VMSTATE_I2C_SLAVE(i2c, ssd0303_state), 283 VMSTATE_END_OF_LIST() 284 } 285 }; 286 287 static int ssd0303_init(I2CSlave *i2c) 288 { 289 ssd0303_state *s = FROM_I2C_SLAVE(ssd0303_state, i2c); 290 291 s->con = graphic_console_init(ssd0303_update_display, 292 ssd0303_invalidate_display, 293 NULL, NULL, s); 294 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); 295 return 0; 296 } 297 298 static void ssd0303_class_init(ObjectClass *klass, void *data) 299 { 300 DeviceClass *dc = DEVICE_CLASS(klass); 301 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); 302 303 k->init = ssd0303_init; 304 k->event = ssd0303_event; 305 k->recv = ssd0303_recv; 306 k->send = ssd0303_send; 307 dc->vmsd = &vmstate_ssd0303; 308 } 309 310 static const TypeInfo ssd0303_info = { 311 .name = "ssd0303", 312 .parent = TYPE_I2C_SLAVE, 313 .instance_size = sizeof(ssd0303_state), 314 .class_init = ssd0303_class_init, 315 }; 316 317 static void ssd0303_register_types(void) 318 { 319 type_register_static(&ssd0303_info); 320 } 321 322 type_init(ssd0303_register_types) 323