| 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 commands 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 | #include "qom/object.h" |
| 20 | |
| 21 | //#define DEBUG_SSD0303 1 |
| 22 | |
| 23 | #ifdef DEBUG_SSD0303 |
| 24 | #define DPRINTF(fmt, ...) \ |
| 25 | do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) |
| 26 | #define BADF(fmt, ...) \ |
| 27 | do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) |
| 28 | #else |
| 29 | #define DPRINTF(fmt, ...) do {} while(0) |
| 30 | #define BADF(fmt, ...) \ |
| 31 | do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) |
| 32 | #endif |
| 33 | |
| 34 | /* Scaling factor for pixels. */ |
| 35 | #define MAGNIFY 4 |
| 36 | |
| 37 | enum ssd0303_mode |
| 38 | { |
| 39 | SSD0303_IDLE, |
| 40 | SSD0303_DATA, |
| 41 | SSD0303_CMD |
| 42 | }; |
| 43 | |
| 44 | enum ssd0303_cmd { |
| 45 | SSD0303_CMD_NONE, |
| 46 | SSD0303_CMD_SKIP1 |
| 47 | }; |
| 48 | |
| 49 | #define TYPE_SSD0303 "ssd0303" |
| 50 | OBJECT_DECLARE_SIMPLE_TYPE(ssd0303_state, SSD0303) |
| 51 | |
| 52 | struct ssd0303_state { |
| 53 | I2CSlave parent_obj; |
| 54 | |
| 55 | QemuConsole *con; |
| 56 | int row; |
| 57 | int col; |
| 58 | int start_line; |
| 59 | int mirror; |
| 60 | int flash; |
| 61 | int enabled; |
| 62 | int inverse; |
| 63 | int redraw; |
| 64 | enum ssd0303_mode mode; |
| 65 | enum ssd0303_cmd cmd_state; |
| 66 | uint8_t framebuffer[132*8]; |
| 67 | }; |
| 68 | |
| 69 | static uint8_t ssd0303_recv(I2CSlave *i2c) |
| 70 | { |
| 71 | BADF("Reads not implemented\n"); |
| 72 | return 0xff; |
| 73 | } |
| 74 | |
| 75 | static int ssd0303_send(I2CSlave *i2c, uint8_t data) |
| 76 | { |
| 77 | ssd0303_state *s = SSD0303(i2c); |
| 78 | enum ssd0303_cmd old_cmd_state; |
| 79 | |
| 80 | switch (s->mode) { |
| 81 | case SSD0303_IDLE: |
| 82 | DPRINTF("byte 0x%02x\n", data); |
| 83 | if (data == 0x80) |
| 84 | s->mode = SSD0303_CMD; |
| 85 | else if (data == 0x40) |
| 86 | s->mode = SSD0303_DATA; |
| 87 | else |
| 88 | BADF("Unexpected byte 0x%x\n", data); |
| 89 | break; |
| 90 | case SSD0303_DATA: |
| 91 | DPRINTF("data 0x%02x\n", data); |
| 92 | if (s->col < 132) { |
| 93 | s->framebuffer[s->col + s->row * 132] = data; |
| 94 | s->col++; |
| 95 | s->redraw = 1; |
| 96 | } |
| 97 | break; |
| 98 | case SSD0303_CMD: |
| 99 | old_cmd_state = s->cmd_state; |
| 100 | s->cmd_state = SSD0303_CMD_NONE; |
| 101 | switch (old_cmd_state) { |
| 102 | case SSD0303_CMD_NONE: |
| 103 | DPRINTF("cmd 0x%02x\n", data); |
| 104 | s->mode = SSD0303_IDLE; |
| 105 | switch (data) { |
| 106 | case 0x00 ... 0x0f: /* Set lower column address. */ |
| 107 | s->col = (s->col & 0xf0) | (data & 0xf); |
| 108 | break; |
| 109 | case 0x10 ... 0x20: /* Set higher column address. */ |
| 110 | s->col = (s->col & 0x0f) | ((data & 0xf) << 4); |
| 111 | break; |
| 112 | case 0x40 ... 0x7f: /* Set start line. */ |
| 113 | s->start_line = 0; |
| 114 | break; |
| 115 | case 0x81: /* Set contrast (Ignored). */ |
| 116 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 117 | break; |
| 118 | case 0xa0: /* Mirror off. */ |
| 119 | s->mirror = 0; |
| 120 | break; |
| 121 | case 0xa1: /* Mirror off. */ |
| 122 | s->mirror = 1; |
| 123 | break; |
| 124 | case 0xa4: /* Entire display off. */ |
| 125 | s->flash = 0; |
| 126 | break; |
| 127 | case 0xa5: /* Entire display on. */ |
| 128 | s->flash = 1; |
| 129 | break; |
| 130 | case 0xa6: /* Inverse off. */ |
| 131 | s->inverse = 0; |
| 132 | break; |
| 133 | case 0xa7: /* Inverse on. */ |
| 134 | s->inverse = 1; |
| 135 | break; |
| 136 | case 0xa8: /* Set multiplied ratio (Ignored). */ |
| 137 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 138 | break; |
| 139 | case 0xad: /* DC-DC power control. */ |
| 140 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 141 | break; |
| 142 | case 0xae: /* Display off. */ |
| 143 | s->enabled = 0; |
| 144 | break; |
| 145 | case 0xaf: /* Display on. */ |
| 146 | s->enabled = 1; |
| 147 | break; |
| 148 | case 0xb0 ... 0xbf: /* Set Page address. */ |
| 149 | s->row = data & 7; |
| 150 | break; |
| 151 | case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ |
| 152 | break; |
| 153 | case 0xd3: /* Set display offset (Ignored). */ |
| 154 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 155 | break; |
| 156 | case 0xd5: /* Set display clock (Ignored). */ |
| 157 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 158 | break; |
| 159 | case 0xd8: /* Set color and power mode (Ignored). */ |
| 160 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 161 | break; |
| 162 | case 0xd9: /* Set pre-charge period (Ignored). */ |
| 163 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 164 | break; |
| 165 | case 0xda: /* Set COM pin configuration (Ignored). */ |
| 166 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 167 | break; |
| 168 | case 0xdb: /* Set VCOM dselect level (Ignored). */ |
| 169 | s->cmd_state = SSD0303_CMD_SKIP1; |
| 170 | break; |
| 171 | case 0xe3: /* no-op. */ |
| 172 | break; |
| 173 | default: |
| 174 | BADF("Unknown command: 0x%x\n", data); |
| 175 | } |
| 176 | break; |
| 177 | case SSD0303_CMD_SKIP1: |
| 178 | DPRINTF("skip 0x%02x\n", data); |
| 179 | break; |
| 180 | } |
| 181 | break; |
| 182 | } |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | static int ssd0303_event(I2CSlave *i2c, enum i2c_event event) |
| 187 | { |
| 188 | ssd0303_state *s = SSD0303(i2c); |
| 189 | |
| 190 | switch (event) { |
| 191 | case I2C_FINISH: |
| 192 | s->mode = SSD0303_IDLE; |
| 193 | break; |
| 194 | case I2C_START_RECV: |
| 195 | case I2C_START_SEND: |
| 196 | case I2C_NACK: |
| 197 | /* Nothing to do. */ |
| 198 | break; |
| 199 | default: |
| 200 | return -1; |
| 201 | } |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static bool ssd0303_update_display(void *opaque) |
| 207 | { |
| 208 | ssd0303_state *s = (ssd0303_state *)opaque; |
| 209 | DisplaySurface *surface = qemu_console_surface(s->con); |
| 210 | uint8_t *dest; |
| 211 | uint8_t *src; |
| 212 | int x; |
| 213 | int y; |
| 214 | int line; |
| 215 | char *colors[2]; |
| 216 | char colortab[MAGNIFY * 8]; |
| 217 | int dest_width; |
| 218 | uint8_t mask; |
| 219 | |
| 220 | if (!s->redraw) |
| 221 | return true; |
| 222 | |
| 223 | switch (surface_bits_per_pixel(surface)) { |
| 224 | case 0: |
| 225 | return true; |
| 226 | case 15: |
| 227 | dest_width = 2; |
| 228 | break; |
| 229 | case 16: |
| 230 | dest_width = 2; |
| 231 | break; |
| 232 | case 24: |
| 233 | dest_width = 3; |
| 234 | break; |
| 235 | case 32: |
| 236 | dest_width = 4; |
| 237 | break; |
| 238 | default: |
| 239 | BADF("Bad color depth\n"); |
| 240 | return true; |
| 241 | } |
| 242 | dest_width *= MAGNIFY; |
| 243 | memset(colortab, 0xff, dest_width); |
| 244 | memset(colortab + dest_width, 0, dest_width); |
| 245 | if (s->flash) { |
| 246 | colors[0] = colortab; |
| 247 | colors[1] = colortab; |
| 248 | } else if (s->inverse) { |
| 249 | colors[0] = colortab; |
| 250 | colors[1] = colortab + dest_width; |
| 251 | } else { |
| 252 | colors[0] = colortab + dest_width; |
| 253 | colors[1] = colortab; |
| 254 | } |
| 255 | dest = surface_data(surface); |
| 256 | for (y = 0; y < 16; y++) { |
| 257 | line = (y + s->start_line) & 63; |
| 258 | src = s->framebuffer + 132 * (line >> 3) + 36; |
| 259 | mask = 1 << (line & 7); |
| 260 | for (x = 0; x < 96; x++) { |
| 261 | memcpy(dest, colors[(*src & mask) != 0], dest_width); |
| 262 | dest += dest_width; |
| 263 | src++; |
| 264 | } |
| 265 | for (x = 1; x < MAGNIFY; x++) { |
| 266 | memcpy(dest, dest - dest_width * 96, dest_width * 96); |
| 267 | dest += dest_width * 96; |
| 268 | } |
| 269 | } |
| 270 | s->redraw = 0; |
| 271 | qemu_console_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); |
| 272 | |
| 273 | return true; |
| 274 | } |
| 275 | |
| 276 | static void ssd0303_invalidate_display(void * opaque) |
| 277 | { |
| 278 | ssd0303_state *s = (ssd0303_state *)opaque; |
| 279 | s->redraw = 1; |
| 280 | } |
| 281 | |
| 282 | static const VMStateDescription vmstate_ssd0303 = { |
| 283 | .name = "ssd0303_oled", |
| 284 | .version_id = 1, |
| 285 | .minimum_version_id = 1, |
| 286 | .fields = (const VMStateField[]) { |
| 287 | VMSTATE_INT32(row, ssd0303_state), |
| 288 | VMSTATE_INT32(col, ssd0303_state), |
| 289 | VMSTATE_INT32(start_line, ssd0303_state), |
| 290 | VMSTATE_INT32(mirror, ssd0303_state), |
| 291 | VMSTATE_INT32(flash, ssd0303_state), |
| 292 | VMSTATE_INT32(enabled, ssd0303_state), |
| 293 | VMSTATE_INT32(inverse, ssd0303_state), |
| 294 | VMSTATE_INT32(redraw, ssd0303_state), |
| 295 | VMSTATE_UINT32(mode, ssd0303_state), |
| 296 | VMSTATE_UINT32(cmd_state, ssd0303_state), |
| 297 | VMSTATE_BUFFER(framebuffer, ssd0303_state), |
| 298 | VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state), |
| 299 | VMSTATE_END_OF_LIST() |
| 300 | } |
| 301 | }; |
| 302 | |
| 303 | static const GraphicHwOps ssd0303_ops = { |
| 304 | .invalidate = ssd0303_invalidate_display, |
| 305 | .gfx_update = ssd0303_update_display, |
| 306 | }; |
| 307 | |
| 308 | static void ssd0303_realize(DeviceState *dev, Error **errp) |
| 309 | { |
| 310 | ssd0303_state *s = SSD0303(dev); |
| 311 | |
| 312 | s->con = qemu_graphic_console_create(dev, 0, &ssd0303_ops, s); |
| 313 | qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); |
| 314 | } |
| 315 | |
| 316 | static void ssd0303_class_init(ObjectClass *klass, const void *data) |
| 317 | { |
| 318 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 319 | I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); |
| 320 | |
| 321 | dc->realize = ssd0303_realize; |
| 322 | k->event = ssd0303_event; |
| 323 | k->recv = ssd0303_recv; |
| 324 | k->send = ssd0303_send; |
| 325 | dc->vmsd = &vmstate_ssd0303; |
| 326 | } |
| 327 | |
| 328 | static const TypeInfo ssd0303_info = { |
| 329 | .name = TYPE_SSD0303, |
| 330 | .parent = TYPE_I2C_SLAVE, |
| 331 | .instance_size = sizeof(ssd0303_state), |
| 332 | .class_init = ssd0303_class_init, |
| 333 | }; |
| 334 | |
| 335 | static void ssd0303_register_types(void) |
| 336 | { |
| 337 | type_register_static(&ssd0303_info); |
| 338 | } |
| 339 | |
| 340 | type_init(ssd0303_register_types) |