Merge remote-tracking branch 'remotes/elmarco/tags/slirp-pull-request' into staging
[qemu.git] / hw / display / cg3.c
1 /*
2 * QEMU CG3 Frame buffer
3 *
4 * Copyright (c) 2012 Bob Breuer
5 * Copyright (c) 2013 Mark Cave-Ayland
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "qemu/osdep.h"
27 #include "qemu-common.h"
28 #include "qapi/error.h"
29 #include "qemu/error-report.h"
30 #include "ui/console.h"
31 #include "hw/sysbus.h"
32 #include "migration/vmstate.h"
33 #include "hw/irq.h"
34 #include "hw/loader.h"
35 #include "hw/qdev-properties.h"
36 #include "qemu/log.h"
37 #include "qemu/module.h"
38
39 /* Change to 1 to enable debugging */
40 #define DEBUG_CG3 0
41
42 #define CG3_ROM_FILE "QEMU,cgthree.bin"
43 #define FCODE_MAX_ROM_SIZE 0x10000
44
45 #define CG3_REG_SIZE 0x20
46
47 #define CG3_REG_BT458_ADDR 0x0
48 #define CG3_REG_BT458_COLMAP 0x4
49 #define CG3_REG_FBC_CTRL 0x10
50 #define CG3_REG_FBC_STATUS 0x11
51 #define CG3_REG_FBC_CURSTART 0x12
52 #define CG3_REG_FBC_CUREND 0x13
53 #define CG3_REG_FBC_VCTRL 0x14
54
55 /* Control register flags */
56 #define CG3_CR_ENABLE_INTS 0x80
57
58 /* Status register flags */
59 #define CG3_SR_PENDING_INT 0x80
60 #define CG3_SR_1152_900_76_B 0x60
61 #define CG3_SR_ID_COLOR 0x01
62
63 #define CG3_VRAM_SIZE 0x100000
64 #define CG3_VRAM_OFFSET 0x800000
65
66 #define DPRINTF(fmt, ...) do { \
67 if (DEBUG_CG3) { \
68 printf("CG3: " fmt , ## __VA_ARGS__); \
69 } \
70 } while (0)
71
72 #define TYPE_CG3 "cgthree"
73 #define CG3(obj) OBJECT_CHECK(CG3State, (obj), TYPE_CG3)
74
75 typedef struct CG3State {
76 SysBusDevice parent_obj;
77
78 QemuConsole *con;
79 qemu_irq irq;
80 hwaddr prom_addr;
81 MemoryRegion vram_mem;
82 MemoryRegion rom;
83 MemoryRegion reg;
84 uint32_t vram_size;
85 int full_update;
86 uint8_t regs[16];
87 uint8_t r[256], g[256], b[256];
88 uint16_t width, height, depth;
89 uint8_t dac_index, dac_state;
90 } CG3State;
91
92 static void cg3_update_display(void *opaque)
93 {
94 CG3State *s = opaque;
95 DisplaySurface *surface = qemu_console_surface(s->con);
96 const uint8_t *pix;
97 uint32_t *data;
98 uint32_t dval;
99 int x, y, y_start;
100 unsigned int width, height;
101 ram_addr_t page;
102 DirtyBitmapSnapshot *snap = NULL;
103
104 if (surface_bits_per_pixel(surface) != 32) {
105 return;
106 }
107 width = s->width;
108 height = s->height;
109
110 y_start = -1;
111 pix = memory_region_get_ram_ptr(&s->vram_mem);
112 data = (uint32_t *)surface_data(surface);
113
114 if (!s->full_update) {
115 snap = memory_region_snapshot_and_clear_dirty(&s->vram_mem, 0x0,
116 memory_region_size(&s->vram_mem),
117 DIRTY_MEMORY_VGA);
118 }
119
120 for (y = 0; y < height; y++) {
121 int update;
122
123 page = (ram_addr_t)y * width;
124
125 if (s->full_update) {
126 update = 1;
127 } else {
128 update = memory_region_snapshot_get_dirty(&s->vram_mem, snap, page,
129 width);
130 }
131
132 if (update) {
133 if (y_start < 0) {
134 y_start = y;
135 }
136
137 for (x = 0; x < width; x++) {
138 dval = *pix++;
139 dval = (s->r[dval] << 16) | (s->g[dval] << 8) | s->b[dval];
140 *data++ = dval;
141 }
142 } else {
143 if (y_start >= 0) {
144 dpy_gfx_update(s->con, 0, y_start, width, y - y_start);
145 y_start = -1;
146 }
147 pix += width;
148 data += width;
149 }
150 }
151 s->full_update = 0;
152 if (y_start >= 0) {
153 dpy_gfx_update(s->con, 0, y_start, width, y - y_start);
154 }
155 /* vsync interrupt? */
156 if (s->regs[0] & CG3_CR_ENABLE_INTS) {
157 s->regs[1] |= CG3_SR_PENDING_INT;
158 qemu_irq_raise(s->irq);
159 }
160 g_free(snap);
161 }
162
163 static void cg3_invalidate_display(void *opaque)
164 {
165 CG3State *s = opaque;
166
167 memory_region_set_dirty(&s->vram_mem, 0, CG3_VRAM_SIZE);
168 }
169
170 static uint64_t cg3_reg_read(void *opaque, hwaddr addr, unsigned size)
171 {
172 CG3State *s = opaque;
173 int val;
174
175 switch (addr) {
176 case CG3_REG_BT458_ADDR:
177 case CG3_REG_BT458_COLMAP:
178 val = 0;
179 break;
180 case CG3_REG_FBC_CTRL:
181 val = s->regs[0];
182 break;
183 case CG3_REG_FBC_STATUS:
184 /* monitor ID 6, board type = 1 (color) */
185 val = s->regs[1] | CG3_SR_1152_900_76_B | CG3_SR_ID_COLOR;
186 break;
187 case CG3_REG_FBC_CURSTART ... CG3_REG_SIZE - 1:
188 val = s->regs[addr - 0x10];
189 break;
190 default:
191 qemu_log_mask(LOG_UNIMP,
192 "cg3: Unimplemented register read "
193 "reg 0x%" HWADDR_PRIx " size 0x%x\n",
194 addr, size);
195 val = 0;
196 break;
197 }
198 DPRINTF("read %02x from reg %" HWADDR_PRIx "\n", val, addr);
199 return val;
200 }
201
202 static void cg3_reg_write(void *opaque, hwaddr addr, uint64_t val,
203 unsigned size)
204 {
205 CG3State *s = opaque;
206 uint8_t regval;
207 int i;
208
209 DPRINTF("write %" PRIx64 " to reg %" HWADDR_PRIx " size %d\n",
210 val, addr, size);
211
212 switch (addr) {
213 case CG3_REG_BT458_ADDR:
214 s->dac_index = val;
215 s->dac_state = 0;
216 break;
217 case CG3_REG_BT458_COLMAP:
218 /* This register can be written to as either a long word or a byte */
219 if (size == 1) {
220 val <<= 24;
221 }
222
223 for (i = 0; i < size; i++) {
224 regval = val >> 24;
225
226 switch (s->dac_state) {
227 case 0:
228 s->r[s->dac_index] = regval;
229 s->dac_state++;
230 break;
231 case 1:
232 s->g[s->dac_index] = regval;
233 s->dac_state++;
234 break;
235 case 2:
236 s->b[s->dac_index] = regval;
237 /* Index autoincrement */
238 s->dac_index = (s->dac_index + 1) & 0xff;
239 /* fall through */
240 default:
241 s->dac_state = 0;
242 break;
243 }
244 val <<= 8;
245 }
246 s->full_update = 1;
247 break;
248 case CG3_REG_FBC_CTRL:
249 s->regs[0] = val;
250 break;
251 case CG3_REG_FBC_STATUS:
252 if (s->regs[1] & CG3_SR_PENDING_INT) {
253 /* clear interrupt */
254 s->regs[1] &= ~CG3_SR_PENDING_INT;
255 qemu_irq_lower(s->irq);
256 }
257 break;
258 case CG3_REG_FBC_CURSTART ... CG3_REG_SIZE - 1:
259 s->regs[addr - 0x10] = val;
260 break;
261 default:
262 qemu_log_mask(LOG_UNIMP,
263 "cg3: Unimplemented register write "
264 "reg 0x%" HWADDR_PRIx " size 0x%x value 0x%" PRIx64 "\n",
265 addr, size, val);
266 break;
267 }
268 }
269
270 static const MemoryRegionOps cg3_reg_ops = {
271 .read = cg3_reg_read,
272 .write = cg3_reg_write,
273 .endianness = DEVICE_NATIVE_ENDIAN,
274 .valid = {
275 .min_access_size = 1,
276 .max_access_size = 4,
277 },
278 };
279
280 static const GraphicHwOps cg3_ops = {
281 .invalidate = cg3_invalidate_display,
282 .gfx_update = cg3_update_display,
283 };
284
285 static void cg3_initfn(Object *obj)
286 {
287 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
288 CG3State *s = CG3(obj);
289
290 memory_region_init_rom_nomigrate(&s->rom, obj, "cg3.prom",
291 FCODE_MAX_ROM_SIZE, &error_fatal);
292 sysbus_init_mmio(sbd, &s->rom);
293
294 memory_region_init_io(&s->reg, obj, &cg3_reg_ops, s, "cg3.reg",
295 CG3_REG_SIZE);
296 sysbus_init_mmio(sbd, &s->reg);
297 }
298
299 static void cg3_realizefn(DeviceState *dev, Error **errp)
300 {
301 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
302 CG3State *s = CG3(dev);
303 int ret;
304 char *fcode_filename;
305
306 /* FCode ROM */
307 vmstate_register_ram_global(&s->rom);
308 fcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, CG3_ROM_FILE);
309 if (fcode_filename) {
310 ret = load_image_mr(fcode_filename, &s->rom);
311 g_free(fcode_filename);
312 if (ret < 0 || ret > FCODE_MAX_ROM_SIZE) {
313 warn_report("cg3: could not load prom '%s'", CG3_ROM_FILE);
314 }
315 }
316
317 memory_region_init_ram(&s->vram_mem, NULL, "cg3.vram", s->vram_size,
318 &error_fatal);
319 memory_region_set_log(&s->vram_mem, true, DIRTY_MEMORY_VGA);
320 sysbus_init_mmio(sbd, &s->vram_mem);
321
322 sysbus_init_irq(sbd, &s->irq);
323
324 s->con = graphic_console_init(DEVICE(dev), 0, &cg3_ops, s);
325 qemu_console_resize(s->con, s->width, s->height);
326 }
327
328 static int vmstate_cg3_post_load(void *opaque, int version_id)
329 {
330 CG3State *s = opaque;
331
332 cg3_invalidate_display(s);
333
334 return 0;
335 }
336
337 static const VMStateDescription vmstate_cg3 = {
338 .name = "cg3",
339 .version_id = 1,
340 .minimum_version_id = 1,
341 .post_load = vmstate_cg3_post_load,
342 .fields = (VMStateField[]) {
343 VMSTATE_UINT16(height, CG3State),
344 VMSTATE_UINT16(width, CG3State),
345 VMSTATE_UINT16(depth, CG3State),
346 VMSTATE_BUFFER(r, CG3State),
347 VMSTATE_BUFFER(g, CG3State),
348 VMSTATE_BUFFER(b, CG3State),
349 VMSTATE_UINT8(dac_index, CG3State),
350 VMSTATE_UINT8(dac_state, CG3State),
351 VMSTATE_END_OF_LIST()
352 }
353 };
354
355 static void cg3_reset(DeviceState *d)
356 {
357 CG3State *s = CG3(d);
358
359 /* Initialize palette */
360 memset(s->r, 0, 256);
361 memset(s->g, 0, 256);
362 memset(s->b, 0, 256);
363
364 s->dac_state = 0;
365 s->full_update = 1;
366 qemu_irq_lower(s->irq);
367 }
368
369 static Property cg3_properties[] = {
370 DEFINE_PROP_UINT32("vram-size", CG3State, vram_size, -1),
371 DEFINE_PROP_UINT16("width", CG3State, width, -1),
372 DEFINE_PROP_UINT16("height", CG3State, height, -1),
373 DEFINE_PROP_UINT16("depth", CG3State, depth, -1),
374 DEFINE_PROP_END_OF_LIST(),
375 };
376
377 static void cg3_class_init(ObjectClass *klass, void *data)
378 {
379 DeviceClass *dc = DEVICE_CLASS(klass);
380
381 dc->realize = cg3_realizefn;
382 dc->reset = cg3_reset;
383 dc->vmsd = &vmstate_cg3;
384 device_class_set_props(dc, cg3_properties);
385 }
386
387 static const TypeInfo cg3_info = {
388 .name = TYPE_CG3,
389 .parent = TYPE_SYS_BUS_DEVICE,
390 .instance_size = sizeof(CG3State),
391 .instance_init = cg3_initfn,
392 .class_init = cg3_class_init,
393 };
394
395 static void cg3_register_types(void)
396 {
397 type_register_static(&cg3_info);
398 }
399
400 type_init(cg3_register_types)