1
2
3
4
5
6
7
8
9
10
11
12
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
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
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:
107 s->col = (s->col & 0xf0) | (data & 0xf);
108 break;
109 case 0x10 ... 0x20:
110 s->col = (s->col & 0x0f) | ((data & 0xf) << 4);
111 break;
112 case 0x40 ... 0x7f:
113 s->start_line = 0;
114 break;
115 case 0x81:
116 s->cmd_state = SSD0303_CMD_SKIP1;
117 break;
118 case 0xa0:
119 s->mirror = 0;
120 break;
121 case 0xa1:
122 s->mirror = 1;
123 break;
124 case 0xa4:
125 s->flash = 0;
126 break;
127 case 0xa5:
128 s->flash = 1;
129 break;
130 case 0xa6:
131 s->inverse = 0;
132 break;
133 case 0xa7:
134 s->inverse = 1;
135 break;
136 case 0xa8:
137 s->cmd_state = SSD0303_CMD_SKIP1;
138 break;
139 case 0xad:
140 s->cmd_state = SSD0303_CMD_SKIP1;
141 break;
142 case 0xae:
143 s->enabled = 0;
144 break;
145 case 0xaf:
146 s->enabled = 1;
147 break;
148 case 0xb0 ... 0xbf:
149 s->row = data & 7;
150 break;
151 case 0xc0 ... 0xc8:
152 break;
153 case 0xd3:
154 s->cmd_state = SSD0303_CMD_SKIP1;
155 break;
156 case 0xd5:
157 s->cmd_state = SSD0303_CMD_SKIP1;
158 break;
159 case 0xd8:
160 s->cmd_state = SSD0303_CMD_SKIP1;
161 break;
162 case 0xd9:
163 s->cmd_state = SSD0303_CMD_SKIP1;
164 break;
165 case 0xda:
166 s->cmd_state = SSD0303_CMD_SKIP1;
167 break;
168 case 0xdb:
169 s->cmd_state = SSD0303_CMD_SKIP1;
170 break;
171 case 0xe3:
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
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)
337
