Merge tag 'linux-user-for-8.0-pull-request' of https://gitlab.com/laurent_vivier...
[qemu.git] / hw / display / ssd0303.c
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, ...) \
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 void 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;
222
223 switch (surface_bits_per_pixel(surface)) {
224 case 0:
225 return;
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;
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 dpy_gfx_update(s->con, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY);
272 }
273
274 static void ssd0303_invalidate_display(void * opaque)
275 {
276 ssd0303_state *s = (ssd0303_state *)opaque;
277 s->redraw = 1;
278 }
279
280 static const VMStateDescription vmstate_ssd0303 = {
281 .name = "ssd0303_oled",
282 .version_id = 1,
283 .minimum_version_id = 1,
284 .fields = (VMStateField[]) {
285 VMSTATE_INT32(row, ssd0303_state),
286 VMSTATE_INT32(col, ssd0303_state),
287 VMSTATE_INT32(start_line, ssd0303_state),
288 VMSTATE_INT32(mirror, ssd0303_state),
289 VMSTATE_INT32(flash, ssd0303_state),
290 VMSTATE_INT32(enabled, ssd0303_state),
291 VMSTATE_INT32(inverse, ssd0303_state),
292 VMSTATE_INT32(redraw, ssd0303_state),
293 VMSTATE_UINT32(mode, ssd0303_state),
294 VMSTATE_UINT32(cmd_state, ssd0303_state),
295 VMSTATE_BUFFER(framebuffer, ssd0303_state),
296 VMSTATE_I2C_SLAVE(parent_obj, ssd0303_state),
297 VMSTATE_END_OF_LIST()
298 }
299 };
300
301 static const GraphicHwOps ssd0303_ops = {
302 .invalidate = ssd0303_invalidate_display,
303 .gfx_update = ssd0303_update_display,
304 };
305
306 static void ssd0303_realize(DeviceState *dev, Error **errp)
307 {
308 ssd0303_state *s = SSD0303(dev);
309
310 s->con = graphic_console_init(dev, 0, &ssd0303_ops, s);
311 qemu_console_resize(s->con, 96 * MAGNIFY, 16 * MAGNIFY);
312 }
313
314 static void ssd0303_class_init(ObjectClass *klass, void *data)
315 {
316 DeviceClass *dc = DEVICE_CLASS(klass);
317 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
318
319 dc->realize = ssd0303_realize;
320 k->event = ssd0303_event;
321 k->recv = ssd0303_recv;
322 k->send = ssd0303_send;
323 dc->vmsd = &vmstate_ssd0303;
324 }
325
326 static const TypeInfo ssd0303_info = {
327 .name = TYPE_SSD0303,
328 .parent = TYPE_I2C_SLAVE,
329 .instance_size = sizeof(ssd0303_state),
330 .class_init = ssd0303_class_init,
331 };
332
333 static void ssd0303_register_types(void)
334 {
335 type_register_static(&ssd0303_info);
336 }
337
338 type_init(ssd0303_register_types)