1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25#include "qemu/osdep.h"
26#include "qapi/error.h"
27#include "hw/display/bcm2835_fb.h"
28#include "hw/hw.h"
29#include "hw/irq.h"
30#include "framebuffer.h"
31#include "ui/pixel_ops.h"
32#include "hw/misc/bcm2835_mbox_defs.h"
33#include "hw/qdev-properties.h"
34#include "migration/vmstate.h"
35#include "qemu/log.h"
36#include "qemu/module.h"
37
38#define DEFAULT_VCRAM_SIZE 0x4000000
39#define BCM2835_FB_OFFSET 0x00100000
40
41
42#define XRES_MAX 3840
43#define YRES_MAX 2560
44
45#define XRES_SMALL 592
46#define YRES_SMALL 488
47
48static void fb_invalidate_display(void *opaque)
49{
50 BCM2835FBState *s = BCM2835_FB(opaque);
51
52 s->invalidate = true;
53}
54
55static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
56 int width, int deststep)
57{
58 BCM2835FBState *s = opaque;
59 uint16_t rgb565;
60 uint32_t rgb888;
61 uint8_t r, g, b;
62 DisplaySurface *surface = qemu_console_surface(s->con);
63 int bpp = surface_bits_per_pixel(surface);
64
65 while (width--) {
66 switch (s->config.bpp) {
67 case 8:
68
69
70
71 rgb888 = ldl_le_phys(&s->dma_as, s->vcram_base + (*src << 2));
72 r = (rgb888 >> 0) & 0xff;
73 g = (rgb888 >> 8) & 0xff;
74 b = (rgb888 >> 16) & 0xff;
75 src++;
76 break;
77 case 16:
78 rgb565 = lduw_le_p(src);
79 r = ((rgb565 >> 11) & 0x1f) << 3;
80 g = ((rgb565 >> 5) & 0x3f) << 2;
81 b = ((rgb565 >> 0) & 0x1f) << 3;
82 src += 2;
83 break;
84 case 24:
85 rgb888 = ldl_le_p(src);
86 r = (rgb888 >> 0) & 0xff;
87 g = (rgb888 >> 8) & 0xff;
88 b = (rgb888 >> 16) & 0xff;
89 src += 3;
90 break;
91 case 32:
92 rgb888 = ldl_le_p(src);
93 r = (rgb888 >> 0) & 0xff;
94 g = (rgb888 >> 8) & 0xff;
95 b = (rgb888 >> 16) & 0xff;
96 src += 4;
97 break;
98 default:
99 r = 0;
100 g = 0;
101 b = 0;
102 break;
103 }
104
105 if (s->config.pixo == 0) {
106
107 uint8_t tmp = r;
108 r = b;
109 b = tmp;
110 }
111
112 switch (bpp) {
113 case 8:
114 *dst++ = rgb_to_pixel8(r, g, b);
115 break;
116 case 15:
117 *(uint16_t *)dst = rgb_to_pixel15(r, g, b);
118 dst += 2;
119 break;
120 case 16:
121 *(uint16_t *)dst = rgb_to_pixel16(r, g, b);
122 dst += 2;
123 break;
124 case 24:
125 rgb888 = rgb_to_pixel24(r, g, b);
126 *dst++ = rgb888 & 0xff;
127 *dst++ = (rgb888 >> 8) & 0xff;
128 *dst++ = (rgb888 >> 16) & 0xff;
129 break;
130 case 32:
131 *(uint32_t *)dst = rgb_to_pixel32(r, g, b);
132 dst += 4;
133 break;
134 default:
135 return;
136 }
137 }
138}
139
140static bool fb_use_offsets(BCM2835FBConfig *config)
141{
142
143
144
145
146
147
148 return config->xres_virtual > config->xres &&
149 config->yres_virtual > config->yres;
150}
151
152static void fb_update_display(void *opaque)
153{
154 BCM2835FBState *s = opaque;
155 DisplaySurface *surface = qemu_console_surface(s->con);
156 int first = 0;
157 int last = 0;
158 int src_width = 0;
159 int dest_width = 0;
160 uint32_t xoff = 0, yoff = 0;
161
162 if (s->lock || !s->config.xres) {
163 return;
164 }
165
166 src_width = bcm2835_fb_get_pitch(&s->config);
167 if (fb_use_offsets(&s->config)) {
168 xoff = s->config.xoffset;
169 yoff = s->config.yoffset;
170 }
171
172 dest_width = s->config.xres;
173
174 switch (surface_bits_per_pixel(surface)) {
175 case 0:
176 return;
177 case 8:
178 break;
179 case 15:
180 dest_width *= 2;
181 break;
182 case 16:
183 dest_width *= 2;
184 break;
185 case 24:
186 dest_width *= 3;
187 break;
188 case 32:
189 dest_width *= 4;
190 break;
191 default:
192 hw_error("bcm2835_fb: bad color depth\n");
193 break;
194 }
195
196 if (s->invalidate) {
197 hwaddr base = s->config.base + xoff + (hwaddr)yoff * src_width;
198 framebuffer_update_memory_section(&s->fbsection, s->dma_mr,
199 base,
200 s->config.yres, src_width);
201 }
202
203 framebuffer_update_display(surface, &s->fbsection,
204 s->config.xres, s->config.yres,
205 src_width, dest_width, 0, s->invalidate,
206 draw_line_src16, s, &first, &last);
207
208 if (first >= 0) {
209 dpy_gfx_update(s->con, 0, first, s->config.xres,
210 last - first + 1);
211 }
212
213 s->invalidate = false;
214}
215
216void bcm2835_fb_validate_config(BCM2835FBConfig *config)
217{
218
219
220
221
222
223
224 config->xres = MIN(config->xres, XRES_MAX);
225 config->xres_virtual = MIN(config->xres_virtual, XRES_MAX);
226 config->yres = MIN(config->yres, YRES_MAX);
227 config->yres_virtual = MIN(config->yres_virtual, YRES_MAX);
228
229
230
231
232
233 if (config->xres == 0) {
234 config->xres = XRES_SMALL;
235 }
236 if (config->yres == 0) {
237 config->yres = YRES_SMALL;
238 }
239 if (config->xres_virtual == 0) {
240 config->xres_virtual = config->xres;
241 }
242 if (config->yres_virtual == 0) {
243 config->yres_virtual = config->yres;
244 }
245
246 if (fb_use_offsets(config)) {
247
248 config->xoffset = MIN(config->xoffset,
249 config->xres_virtual - config->xres);
250 config->yoffset = MIN(config->yoffset,
251 config->yres_virtual - config->yres);
252 }
253}
254
255void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
256{
257 s->lock = true;
258
259 s->config = *newconfig;
260
261 s->invalidate = true;
262 qemu_console_resize(s->con, s->config.xres, s->config.yres);
263 s->lock = false;
264}
265
266static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
267{
268 uint32_t pitch;
269 uint32_t size;
270 BCM2835FBConfig newconf;
271
272 value &= ~0xf;
273
274 newconf.xres = ldl_le_phys(&s->dma_as, value);
275 newconf.yres = ldl_le_phys(&s->dma_as, value + 4);
276 newconf.xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
277 newconf.yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
278 newconf.bpp = ldl_le_phys(&s->dma_as, value + 20);
279 newconf.xoffset = ldl_le_phys(&s->dma_as, value + 24);
280 newconf.yoffset = ldl_le_phys(&s->dma_as, value + 28);
281
282 newconf.base = s->vcram_base | (value & 0xc0000000);
283 newconf.base += BCM2835_FB_OFFSET;
284
285
286 newconf.pixo = s->config.pixo;
287 newconf.alpha = s->config.alpha;
288
289 bcm2835_fb_validate_config(&newconf);
290
291 pitch = bcm2835_fb_get_pitch(&newconf);
292 size = bcm2835_fb_get_size(&newconf);
293
294 stl_le_phys(&s->dma_as, value + 16, pitch);
295 stl_le_phys(&s->dma_as, value + 32, newconf.base);
296 stl_le_phys(&s->dma_as, value + 36, size);
297
298 bcm2835_fb_reconfigure(s, &newconf);
299}
300
301static uint64_t bcm2835_fb_read(void *opaque, hwaddr offset, unsigned size)
302{
303 BCM2835FBState *s = opaque;
304 uint32_t res = 0;
305
306 switch (offset) {
307 case MBOX_AS_DATA:
308 res = MBOX_CHAN_FB;
309 s->pending = false;
310 qemu_set_irq(s->mbox_irq, 0);
311 break;
312
313 case MBOX_AS_PENDING:
314 res = s->pending;
315 break;
316
317 default:
318 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
319 __func__, offset);
320 return 0;
321 }
322
323 return res;
324}
325
326static void bcm2835_fb_write(void *opaque, hwaddr offset, uint64_t value,
327 unsigned size)
328{
329 BCM2835FBState *s = opaque;
330
331 switch (offset) {
332 case MBOX_AS_DATA:
333
334 assert(!s->pending);
335 s->pending = true;
336 bcm2835_fb_mbox_push(s, value);
337 qemu_set_irq(s->mbox_irq, 1);
338 break;
339
340 default:
341 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
342 __func__, offset);
343 return;
344 }
345}
346
347static const MemoryRegionOps bcm2835_fb_ops = {
348 .read = bcm2835_fb_read,
349 .write = bcm2835_fb_write,
350 .endianness = DEVICE_NATIVE_ENDIAN,
351 .valid.min_access_size = 4,
352 .valid.max_access_size = 4,
353};
354
355static const VMStateDescription vmstate_bcm2835_fb = {
356 .name = TYPE_BCM2835_FB,
357 .version_id = 1,
358 .minimum_version_id = 1,
359 .fields = (VMStateField[]) {
360 VMSTATE_BOOL(lock, BCM2835FBState),
361 VMSTATE_BOOL(invalidate, BCM2835FBState),
362 VMSTATE_BOOL(pending, BCM2835FBState),
363 VMSTATE_UINT32(config.xres, BCM2835FBState),
364 VMSTATE_UINT32(config.yres, BCM2835FBState),
365 VMSTATE_UINT32(config.xres_virtual, BCM2835FBState),
366 VMSTATE_UINT32(config.yres_virtual, BCM2835FBState),
367 VMSTATE_UINT32(config.xoffset, BCM2835FBState),
368 VMSTATE_UINT32(config.yoffset, BCM2835FBState),
369 VMSTATE_UINT32(config.bpp, BCM2835FBState),
370 VMSTATE_UINT32(config.base, BCM2835FBState),
371 VMSTATE_UNUSED(8),
372 VMSTATE_UINT32(config.pixo, BCM2835FBState),
373 VMSTATE_UINT32(config.alpha, BCM2835FBState),
374 VMSTATE_END_OF_LIST()
375 }
376};
377
378static const GraphicHwOps vgafb_ops = {
379 .invalidate = fb_invalidate_display,
380 .gfx_update = fb_update_display,
381};
382
383static void bcm2835_fb_init(Object *obj)
384{
385 BCM2835FBState *s = BCM2835_FB(obj);
386
387 memory_region_init_io(&s->iomem, obj, &bcm2835_fb_ops, s, TYPE_BCM2835_FB,
388 0x10);
389 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
390 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
391}
392
393static void bcm2835_fb_reset(DeviceState *dev)
394{
395 BCM2835FBState *s = BCM2835_FB(dev);
396
397 s->pending = false;
398
399 s->config = s->initial_config;
400
401 s->invalidate = true;
402 s->lock = false;
403}
404
405static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
406{
407 BCM2835FBState *s = BCM2835_FB(dev);
408 Object *obj;
409
410 if (s->vcram_base == 0) {
411 error_setg(errp, "%s: required vcram-base property not set", __func__);
412 return;
413 }
414
415 obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
416
417
418 s->initial_config.xres_virtual = s->initial_config.xres;
419 s->initial_config.yres_virtual = s->initial_config.yres;
420 s->initial_config.xoffset = 0;
421 s->initial_config.yoffset = 0;
422 s->initial_config.base = s->vcram_base + BCM2835_FB_OFFSET;
423
424 s->dma_mr = MEMORY_REGION(obj);
425 address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_FB "-memory");
426
427 bcm2835_fb_reset(dev);
428
429 s->con = graphic_console_init(dev, 0, &vgafb_ops, s);
430 qemu_console_resize(s->con, s->config.xres, s->config.yres);
431}
432
433static Property bcm2835_fb_props[] = {
434 DEFINE_PROP_UINT32("vcram-base", BCM2835FBState, vcram_base, 0),
435 DEFINE_PROP_UINT32("vcram-size", BCM2835FBState, vcram_size,
436 DEFAULT_VCRAM_SIZE),
437 DEFINE_PROP_UINT32("xres", BCM2835FBState, initial_config.xres, 640),
438 DEFINE_PROP_UINT32("yres", BCM2835FBState, initial_config.yres, 480),
439 DEFINE_PROP_UINT32("bpp", BCM2835FBState, initial_config.bpp, 16),
440 DEFINE_PROP_UINT32("pixo", BCM2835FBState,
441 initial_config.pixo, 1),
442 DEFINE_PROP_UINT32("alpha", BCM2835FBState,
443 initial_config.alpha, 2),
444 DEFINE_PROP_END_OF_LIST()
445};
446
447static void bcm2835_fb_class_init(ObjectClass *klass, void *data)
448{
449 DeviceClass *dc = DEVICE_CLASS(klass);
450
451 device_class_set_props(dc, bcm2835_fb_props);
452 dc->realize = bcm2835_fb_realize;
453 dc->reset = bcm2835_fb_reset;
454 dc->vmsd = &vmstate_bcm2835_fb;
455}
456
457static TypeInfo bcm2835_fb_info = {
458 .name = TYPE_BCM2835_FB,
459 .parent = TYPE_SYS_BUS_DEVICE,
460 .instance_size = sizeof(BCM2835FBState),
461 .class_init = bcm2835_fb_class_init,
462 .instance_init = bcm2835_fb_init,
463};
464
465static void bcm2835_fb_register_types(void)
466{
467 type_register_static(&bcm2835_fb_info);
468}
469
470type_init(bcm2835_fb_register_types)
471
