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 "qemu/osdep.h" 14 #include "hw/i2c/i2c.h" 15 #include "ui/console.h" 16 17 //#define DEBUG_SSD0303 1 18 19 #ifdef DEBUG_SSD0303 20 #define DPRINTF(fmt, ...) \ 21 do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) 22 #define BADF(fmt, ...) \ 23 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) 24 #else 25 #define DPRINTF(fmt, ...) do {} while(0) 26 #define BADF(fmt, ...) \ 27 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) 28 #endif 29 30 /* Scaling factor for pixels. */ 31 #define MAGNIFY 4 32 33 enum ssd0303_mode 34 { 35 SSD0303_IDLE, 36 SSD0303_DATA, 37 SSD0303_CMD 38 }; 39 40 enum ssd0303_cmd { 41 SSD0303_CMD_NONE, 42 SSD0303_CMD_SKIP1 43 }; 44 45 #define TYPE_SSD0303 "ssd0303" 46 #define SSD0303(obj) OBJECT_CHECK(ssd0303_state, (obj), TYPE_SSD0303) 47 48 typedef struct { 49 I2CSlave parent_obj; 50 51 QemuConsole *con; 52 int row; 53 int col; 54 int start_line; 55 int mirror; 56 int flash; 57 int enabled; 58 int inverse; 59 int redraw; 60 enum ssd0303_mode mode; 61 enum ssd0303_cmd cmd_state; 62 uint8_t framebuffer[132*8]; 63 } ssd0303_state; 64 65 static int ssd0303_recv(I2CSlave *i2c) 66 { 67 BADF("Reads not implemented\n"); 68 return -1; 69 } 70 71 static int ssd0303_send(I2CSlave *i2c, uint8_t data) 72 { 73 ssd0303_state *s = SSD0303(i2c); 74 enum ssd0303_cmd old_cmd_state; 75 76 switch (s->mode) { 77 case SSD0303_IDLE: 78 DPRINTF("byte 0x%02x\n", data); 79 if (data == 0x80) 80 s->mode = SSD0303_CMD; 81 else if (data == 0x40) 82 s->mode = SSD0303_DATA; 83 else 84 BADF("Unexpected byte 0x%x\n", data); 85 break; 86 case SSD0303_DATA: 87 DPRINTF("data 0x%02x\n", data); 88 if (s->col < 132) { 89 s->framebuffer[s->col + s->row * 132] = data; 90 s->col++; 91 s->redraw = 1; 92 } 93 break; 94 case SSD0303_CMD: 95 old_cmd_state = s->cmd_state; 96 s->cmd_state = SSD0303_CMD_NONE; 97 switch (old_cmd_state) { 98 case SSD0303_CMD_NONE: 99 DPRINTF("cmd 0x%02x\n", data); 100 s->mode = SSD0303_IDLE; 101 switch (data) { 102 case 0x00 ... 0x0f: /* Set lower column address. */ 103 s->col = (s->col & 0xf0) | (data & 0xf); 104 break; 105 case 0x10 ... 0x20: /* Set higher column address. */ 106 s->col = (s->col & 0x0f) | ((data & 0xf) << 4); 107 break; 108 case 0x40 ... 0x7f: /* Set start line. */ 109 s->start_line = 0; 110 break; 111 case 0x81: /* Set contrast (Ignored). */ 112 s->cmd_state = SSD0303_CMD_SKIP1; 113 break; 114 case 0xa0: /* Mirror off. */ 115 s->mirror = 0; 116 break; 117 case 0xa1: /* Mirror off. */ 118 s->mirror = 1; 119 break; 120 case 0xa4: /* Entire display off. */ 121 s->flash = 0; 122 break; 123 case 0xa5: /* Entire display on. */ 124 s->flash = 1; 125 break; 126 case 0xa6: /* Inverse off. */ 127 s->inverse = 0; 128 break; 129 case 0xa7: /* Inverse on. */ 130 s->inverse = 1; 131 break; 132 case 0xa8: /* Set multiplied ratio (Ignored). */ 133 s->cmd_state = SSD0303_CMD_SKIP1; 134 break; 135 case 0xad: /* DC-DC power control. */ 136 s->cmd_state = SSD0303_CMD_SKIP1; 137 break; 138 case 0xae: /* Display off. */ 139 s->enabled = 0; 140 break; 141 case 0xaf: /* Display on. */ 142 s->enabled = 1; 143 break; 144 case 0xb0 ... 0xbf: /* Set Page address. */ 145 s->row = data & 7; 146 break; 147 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ 148 break; 149 case 0xd3: /* Set display offset (Ignored). */ 150 s->cmd_state = SSD0303_CMD_SKIP1; 151 break; 152 case 0xd5: /* Set display clock (Ignored). */ 153 s->cmd_state = SSD0303_CMD_SKIP1; 154 break; 155 case 0xd8: /* Set color and power mode (Ignored). */ 156 s->cmd_state = SSD0303_CMD_SKIP1; 157 break; 158 case 0xd9: /* Set pre-charge period (Ignored). */ 159 s->cmd_state = SSD0303_CMD_SKIP1; 160 break; 161 case 0xda: /* Set COM pin configuration (Ignored). */ 162 s->cmd_state = SSD0303_CMD_SKIP1; 163 break; 164 case 0xdb: /* Set VCOM dselect level (Ignored). */ 165 s->cmd_state = SSD0303_CMD_SKIP1; 166 break; 167 case 0xe3: /* no-op. */ 168 break; 169 default: 170 BADF("Unknown command: 0x%x\n", data); 171 } 172 break; 173 case SSD0303_CMD_SKIP1: 174 DPRINTF("skip 0x%02x\n", data); 175 break; 176 } 177 break; 178 } 179 return 0; 180 } 181 182 static int ssd0303_event(I2CSlave *i2c, enum i2c_event event) 183 { 184 ssd0303_state *s = SSD0303(i2c); 185 186 switch (event) { 187 case I2C_FINISH: 188 s->mode = SSD0303_IDLE; 189 break; 190 case I2C_START_RECV: 191 case I2C_START_SEND: 192 case I2C_NACK: 193 /* Nothing to do. */ 194 break; 195 } 196 197 return 0; 198 } 199 200 static void ssd0303_update_display(void *opaque) 201 { 202 ssd0303_state *s = (ssd0303_state *)opaque; 203 DisplaySurface *surface = qemu_console_surface(s->con); 204 uint8_t *dest; 205 uint8_t *src; 206 int x; 207 int y; 208 int line; 209 char *colors[2]; 210 char colortab[MAGNIFY * 8]; 211 int dest_width; 212 uint8_t mask; 213 214 if (!s->redraw) 215 return; 216 217 switch (surface_bits_per_pixel(surface)) { 218 case 0: 219 return; 220 case 15: 221 dest_width = 2; 222 break; 223 case 16: 224 dest_width = 2; 225 break; 226 case 24: 227 dest_width = 3; 228 break; 229 case 32: 230 dest_width = 4; 231 break; 232 default: 233 BADF("Bad color depth\n"); 234 return; 235 } 236 dest_width *= MAGNIFY; 237 memset(colortab, 0xff, dest_width); 238 memset(colortab + dest_width, 0, dest_width); 239 if (s->flash) { 240 colors[0] = colortab; 241 colors[1] = colortab; 242 } else if (s->inverse) { 243 colors[0] = colortab; 244 colors[1] = colortab + dest_width; 245 } else { 246 colors[0] = colortab + dest_width; 247 colors[1] = colortab; 248 } 249 dest = surface_data(surface); 250 for (y = 0; y < 16; y++) { 251 line = (y + s->start_line) & 63; 252 src = s->framebuffer + 132 * (line >> 3) + 36; 253 mask = 1 << (line & 7); 254 for (x = 0; x < 96; x++) { 255 memcpy(dest, colors[(*src & mask) != 0], dest_width); 256 dest += dest_width; 257 src++; 258 } 259 for (x = 1; x < MAGNIFY; x++) { 260 memcpy(dest, dest - dest_width * 96, dest_width * 96); 261 dest += dest_width * 96; 262 } 263 } 264 s->redraw = 0; 265 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); 266 } 267 268 static void ssd0303_invalidate_display(void * opaque) 269 { 270 ssd0303_state *s = (ssd0303_state *)opaque; 271 s->redraw = 1; 272 } 273 274 static const VMStateDescription vmstate_ssd0303 = { 275 .name = "ssd0303_oled", 276 .version_id = 1, 277 .minimum_version_id = 1, 278 .fields = (VMStateField[]) { 279 VMSTATE_INT32(row, ssd0303_state), 280 VMSTATE_INT32(col, ssd0303_state), 281 VMSTATE_INT32(start_line, ssd0303_state), 282 VMSTATE_INT32(mirror, ssd0303_state), 283 VMSTATE_INT32(flash, ssd0303_state), 284 VMSTATE_INT32(enabled, ssd0303_state), 285 VMSTATE_INT32(inverse, ssd0303_state), 286 VMSTATE_INT32(redraw, ssd0303_state), 287 VMSTATE_UINT32(mode, ssd0303_state), 288 VMSTATE_UINT32(cmd_state, ssd0303_state), 289 VMSTATE_BUFFER(framebuffer, ssd0303_state), 290 VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state), 291 VMSTATE_END_OF_LIST() 292 } 293 }; 294 295 static const GraphicHwOps ssd0303_ops = { 296 .invalidate = ssd0303_invalidate_display, 297 .gfx_update = ssd0303_update_display, 298 }; 299 300 static int ssd0303_init(I2CSlave *i2c) 301 { 302 ssd0303_state *s = SSD0303(i2c); 303 304 s->con = graphic_console_init(DEVICE(i2c), 0, &ssd0303_ops, s); 305 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); 306 return 0; 307 } 308 309 static void ssd0303_class_init(ObjectClass *klass, void *data) 310 { 311 DeviceClass *dc = DEVICE_CLASS(klass); 312 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); 313 314 k->init = ssd0303_init; 315 k->event = ssd0303_event; 316 k->recv = ssd0303_recv; 317 k->send = ssd0303_send; 318 dc->vmsd = &vmstate_ssd0303; 319 } 320 321 static const TypeInfo ssd0303_info = { 322 .name = TYPE_SSD0303, 323 .parent = TYPE_I2C_SLAVE, 324 .instance_size = sizeof(ssd0303_state), 325 .class_init = ssd0303_class_init, 326 }; 327 328 static void ssd0303_register_types(void) 329 { 330 type_register_static(&ssd0303_info); 331 } 332 333 type_init(ssd0303_register_types) 334