2 * SSD0303 OLED controller with OSRAM Pictiva 96x16 display.
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GPL.
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
16 //#define DEBUG_SSD0303 1
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)
24 #define DPRINTF(fmt, ...) do {} while(0)
25 #define BADF(fmt, ...) \
26 do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0)
29 /* Scaling factor for pixels. */
55 enum ssd0303_mode mode;
56 enum ssd0303_cmd cmd_state;
57 uint8_t framebuffer[132*8];
60 static int ssd0303_recv(i2c_slave *i2c)
62 BADF("Reads not implemented\n");
66 static int ssd0303_send(i2c_slave *i2c, uint8_t data)
68 ssd0303_state *s = (ssd0303_state *)i2c;
69 enum ssd0303_cmd old_cmd_state;
72 DPRINTF("byte 0x%02x\n", data);
74 s->mode = SSD0303_CMD;
75 else if (data == 0x40)
76 s->mode = SSD0303_DATA;
78 BADF("Unexpected byte 0x%x\n", data);
81 DPRINTF("data 0x%02x\n", data);
83 s->framebuffer[s->col + s->row * 132] = data;
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;
96 case 0x00 ... 0x0f: /* Set lower column address. */
97 s->col = (s->col & 0xf0) | (data & 0xf);
99 case 0x10 ... 0x20: /* Set higher column address. */
100 s->col = (s->col & 0x0f) | ((data & 0xf) << 4);
102 case 0x40 ... 0x7f: /* Set start line. */
105 case 0x81: /* Set contrast (Ignored). */
106 s->cmd_state = SSD0303_CMD_SKIP1;
108 case 0xa0: /* Mirror off. */
111 case 0xa1: /* Mirror off. */
114 case 0xa4: /* Entire display off. */
117 case 0xa5: /* Entire display on. */
120 case 0xa6: /* Inverse off. */
123 case 0xa7: /* Inverse on. */
126 case 0xa8: /* Set multipled ratio (Ignored). */
127 s->cmd_state = SSD0303_CMD_SKIP1;
129 case 0xad: /* DC-DC power control. */
130 s->cmd_state = SSD0303_CMD_SKIP1;
132 case 0xae: /* Display off. */
135 case 0xaf: /* Display on. */
138 case 0xb0 ... 0xbf: /* Set Page address. */
141 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */
143 case 0xd3: /* Set display offset (Ignored). */
144 s->cmd_state = SSD0303_CMD_SKIP1;
146 case 0xd5: /* Set display clock (Ignored). */
147 s->cmd_state = SSD0303_CMD_SKIP1;
149 case 0xd8: /* Set color and power mode (Ignored). */
150 s->cmd_state = SSD0303_CMD_SKIP1;
152 case 0xd9: /* Set pre-charge period (Ignored). */
153 s->cmd_state = SSD0303_CMD_SKIP1;
155 case 0xda: /* Set COM pin configuration (Ignored). */
156 s->cmd_state = SSD0303_CMD_SKIP1;
158 case 0xdb: /* Set VCOM dselect level (Ignored). */
159 s->cmd_state = SSD0303_CMD_SKIP1;
161 case 0xe3: /* no-op. */
164 BADF("Unknown command: 0x%x\n", data);
167 case SSD0303_CMD_SKIP1:
168 DPRINTF("skip 0x%02x\n", data);
176 static void ssd0303_event(i2c_slave *i2c, enum i2c_event event)
178 ssd0303_state *s = (ssd0303_state *)i2c;
181 s->mode = SSD0303_IDLE;
191 static void ssd0303_update_display(void *opaque)
193 ssd0303_state *s = (ssd0303_state *)opaque;
200 char colortab[MAGNIFY * 8];
207 switch (ds_get_bits_per_pixel(s->ds)) {
223 BADF("Bad color depth\n");
226 dest_width *= MAGNIFY;
227 memset(colortab, 0xff, dest_width);
228 memset(colortab + dest_width, 0, dest_width);
230 colors[0] = colortab;
231 colors[1] = colortab;
232 } else if (s->inverse) {
233 colors[0] = colortab;
234 colors[1] = colortab + dest_width;
236 colors[0] = colortab + dest_width;
237 colors[1] = colortab;
239 dest = ds_get_data(s->ds);
240 for (y = 0; y < 16; y++) {
241 line = (y + s->start_line) & 63;
242 src = s->framebuffer + 132 * (line >> 3) + 36;
243 mask = 1 << (line & 7);
244 for (x = 0; x < 96; x++) {
245 memcpy(dest, colors[(*src & mask) != 0], dest_width);
249 for (x = 1; x < MAGNIFY; x++) {
250 memcpy(dest, dest - dest_width * 96, dest_width * 96);
251 dest += dest_width * 96;
255 dpy_update(s->ds, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY);
258 static void ssd0303_invalidate_display(void * opaque)
260 ssd0303_state *s = (ssd0303_state *)opaque;
264 static const VMStateDescription vmstate_ssd0303 = {
265 .name = "ssd0303_oled",
267 .minimum_version_id = 1,
268 .minimum_version_id_old = 1,
269 .fields = (VMStateField []) {
270 VMSTATE_INT32(row, ssd0303_state),
271 VMSTATE_INT32(col, ssd0303_state),
272 VMSTATE_INT32(start_line, ssd0303_state),
273 VMSTATE_INT32(mirror, ssd0303_state),
274 VMSTATE_INT32(flash, ssd0303_state),
275 VMSTATE_INT32(enabled, ssd0303_state),
276 VMSTATE_INT32(inverse, ssd0303_state),
277 VMSTATE_INT32(redraw, ssd0303_state),
278 VMSTATE_UINT32(mode, ssd0303_state),
279 VMSTATE_UINT32(cmd_state, ssd0303_state),
280 VMSTATE_BUFFER(framebuffer, ssd0303_state),
281 VMSTATE_I2C_SLAVE(i2c, ssd0303_state),
282 VMSTATE_END_OF_LIST()
286 static int ssd0303_init(i2c_slave *i2c)
288 ssd0303_state *s = FROM_I2C_SLAVE(ssd0303_state, i2c);
290 s->ds = graphic_console_init(ssd0303_update_display,
291 ssd0303_invalidate_display,
293 qemu_console_resize(s->ds, 96 * MAGNIFY, 16 * MAGNIFY);
297 static I2CSlaveInfo ssd0303_info = {
298 .qdev.name = "ssd0303",
299 .qdev.size = sizeof(ssd0303_state),
300 .qdev.vmsd = &vmstate_ssd0303,
301 .init = ssd0303_init,
302 .event = ssd0303_event,
303 .recv = ssd0303_recv,
307 static void ssd0303_register_devices(void)
309 i2c_register_slave(&ssd0303_info);
312 device_init(ssd0303_register_devices)