ssd0303.c (9349B)
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#include "qom/object.h" 20 21//#define DEBUG_SSD0303 1 22 23#ifdef DEBUG_SSD0303 24#define DPRINTF(fmt, ...) \ 25do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) 26#define BADF(fmt, ...) \ 27do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) 28#else 29#define DPRINTF(fmt, ...) do {} while(0) 30#define BADF(fmt, ...) \ 31do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) 32#endif 33 34/* Scaling factor for pixels. */ 35#define MAGNIFY 4 36 37enum ssd0303_mode 38{ 39 SSD0303_IDLE, 40 SSD0303_DATA, 41 SSD0303_CMD 42}; 43 44enum ssd0303_cmd { 45 SSD0303_CMD_NONE, 46 SSD0303_CMD_SKIP1 47}; 48 49#define TYPE_SSD0303 "ssd0303" 50OBJECT_DECLARE_SIMPLE_TYPE(ssd0303_state, SSD0303) 51 52struct 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 69static uint8_t ssd0303_recv(I2CSlave *i2c) 70{ 71 BADF("Reads not implemented\n"); 72 return 0xff; 73} 74 75static 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 186static 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 } 200 201 return 0; 202} 203 204static void ssd0303_update_display(void *opaque) 205{ 206 ssd0303_state *s = (ssd0303_state *)opaque; 207 DisplaySurface *surface = qemu_console_surface(s->con); 208 uint8_t *dest; 209 uint8_t *src; 210 int x; 211 int y; 212 int line; 213 char *colors[2]; 214 char colortab[MAGNIFY * 8]; 215 int dest_width; 216 uint8_t mask; 217 218 if (!s->redraw) 219 return; 220 221 switch (surface_bits_per_pixel(surface)) { 222 case 0: 223 return; 224 case 15: 225 dest_width = 2; 226 break; 227 case 16: 228 dest_width = 2; 229 break; 230 case 24: 231 dest_width = 3; 232 break; 233 case 32: 234 dest_width = 4; 235 break; 236 default: 237 BADF("Bad color depth\n"); 238 return; 239 } 240 dest_width *= MAGNIFY; 241 memset(colortab, 0xff, dest_width); 242 memset(colortab + dest_width, 0, dest_width); 243 if (s->flash) { 244 colors[0] = colortab; 245 colors[1] = colortab; 246 } else if (s->inverse) { 247 colors[0] = colortab; 248 colors[1] = colortab + dest_width; 249 } else { 250 colors[0] = colortab + dest_width; 251 colors[1] = colortab; 252 } 253 dest = surface_data(surface); 254 for (y = 0; y < 16; y++) { 255 line = (y + s->start_line) & 63; 256 src = s->framebuffer + 132 * (line >> 3) + 36; 257 mask = 1 << (line & 7); 258 for (x = 0; x < 96; x++) { 259 memcpy(dest, colors[(*src & mask) != 0], dest_width); 260 dest += dest_width; 261 src++; 262 } 263 for (x = 1; x < MAGNIFY; x++) { 264 memcpy(dest, dest - dest_width * 96, dest_width * 96); 265 dest += dest_width * 96; 266 } 267 } 268 s->redraw = 0; 269 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); 270} 271 272static void ssd0303_invalidate_display(void * opaque) 273{ 274 ssd0303_state *s = (ssd0303_state *)opaque; 275 s->redraw = 1; 276} 277 278static const VMStateDescription vmstate_ssd0303 = { 279 .name = "ssd0303_oled", 280 .version_id = 1, 281 .minimum_version_id = 1, 282 .fields = (VMStateField[]) { 283 VMSTATE_INT32(row, ssd0303_state), 284 VMSTATE_INT32(col, ssd0303_state), 285 VMSTATE_INT32(start_line, ssd0303_state), 286 VMSTATE_INT32(mirror, ssd0303_state), 287 VMSTATE_INT32(flash, ssd0303_state), 288 VMSTATE_INT32(enabled, ssd0303_state), 289 VMSTATE_INT32(inverse, ssd0303_state), 290 VMSTATE_INT32(redraw, ssd0303_state), 291 VMSTATE_UINT32(mode, ssd0303_state), 292 VMSTATE_UINT32(cmd_state, ssd0303_state), 293 VMSTATE_BUFFER(framebuffer, ssd0303_state), 294 VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state), 295 VMSTATE_END_OF_LIST() 296 } 297}; 298 299static const GraphicHwOps ssd0303_ops = { 300 .invalidate = ssd0303_invalidate_display, 301 .gfx_update = ssd0303_update_display, 302}; 303 304static void ssd0303_realize(DeviceState *dev, Error **errp) 305{ 306 ssd0303_state *s = SSD0303(dev); 307 308 s->con = graphic_console_init(dev, 0, &ssd0303_ops, s); 309 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY); 310} 311 312static void ssd0303_class_init(ObjectClass *klass, void *data) 313{ 314 DeviceClass *dc = DEVICE_CLASS(klass); 315 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); 316 317 dc->realize = ssd0303_realize; 318 k->event = ssd0303_event; 319 k->recv = ssd0303_recv; 320 k->send = ssd0303_send; 321 dc->vmsd = &vmstate_ssd0303; 322} 323 324static const TypeInfo ssd0303_info = { 325 .name = TYPE_SSD0303, 326 .parent = TYPE_I2C_SLAVE, 327 .instance_size = sizeof(ssd0303_state), 328 .class_init = ssd0303_class_init, 329}; 330 331static void ssd0303_register_types(void) 332{ 333 type_register_static(&ssd0303_info); 334} 335 336type_init(ssd0303_register_types)