2 * Raspberry Pi emulation (c) 2012 Gregory Estrade
3 * This code is licensed under the GNU GPLv2 and later.
6 #include "qemu/osdep.h"
7 #include "qapi/error.h"
8 #include "hw/misc/bcm2835_property.h"
9 #include "hw/misc/bcm2835_mbox_defs.h"
10 #include "sysemu/dma.h"
13 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
15 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
23 uint32_t offset, length, color;
26 * Copy the current state of the framebuffer config; we will update
27 * this copy as we process tags and then ask the framebuffer to use
30 BCM2835FBConfig fbconfig = s->fbdev->config;
31 bool fbconfig_updated = false;
37 tot_len = ldl_le_phys(&s->dma_as, value);
39 /* @(addr + 4) : Buffer response code */
41 while (value + 8 <= s->addr + tot_len) {
42 tag = ldl_le_phys(&s->dma_as, value);
43 bufsize = ldl_le_phys(&s->dma_as, value + 4);
44 /* @(value + 8) : Request/response indicator */
47 case 0x00000000: /* End tag */
49 case 0x00000001: /* Get firmware revision */
50 stl_le_phys(&s->dma_as, value + 12, 346337);
53 case 0x00010001: /* Get board model */
54 qemu_log_mask(LOG_UNIMP,
55 "bcm2835_property: %x get board model NYI\n", tag);
58 case 0x00010002: /* Get board revision */
59 stl_le_phys(&s->dma_as, value + 12, s->board_rev);
62 case 0x00010003: /* Get board MAC address */
63 resplen = sizeof(s->macaddr.a);
64 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
66 case 0x00010004: /* Get board serial */
67 qemu_log_mask(LOG_UNIMP,
68 "bcm2835_property: %x get board serial NYI\n", tag);
71 case 0x00010005: /* Get ARM memory */
73 stl_le_phys(&s->dma_as, value + 12, 0);
75 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
78 case 0x00010006: /* Get VC memory */
80 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
82 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
85 case 0x00028001: /* Set power state */
86 /* Assume that whatever device they asked for exists,
87 * and we'll just claim we set it to the desired state
89 tmp = ldl_le_phys(&s->dma_as, value + 16);
90 stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
96 case 0x00030001: /* Get clock state */
97 stl_le_phys(&s->dma_as, value + 16, 0x1);
101 case 0x00038001: /* Set clock state */
102 qemu_log_mask(LOG_UNIMP,
103 "bcm2835_property: %x set clock state NYI\n", tag);
107 case 0x00030002: /* Get clock rate */
108 case 0x00030004: /* Get max clock rate */
109 case 0x00030007: /* Get min clock rate */
110 switch (ldl_le_phys(&s->dma_as, value + 12)) {
112 stl_le_phys(&s->dma_as, value + 16, 50000000);
115 stl_le_phys(&s->dma_as, value + 16, 3000000);
118 stl_le_phys(&s->dma_as, value + 16, 700000000);
124 case 0x00038002: /* Set clock rate */
125 case 0x00038004: /* Set max clock rate */
126 case 0x00038007: /* Set min clock rate */
127 qemu_log_mask(LOG_UNIMP,
128 "bcm2835_property: %x set clock rates NYI\n", tag);
134 case 0x00030006: /* Get temperature */
135 stl_le_phys(&s->dma_as, value + 16, 25000);
139 case 0x0003000A: /* Get max temperature */
140 stl_le_phys(&s->dma_as, value + 16, 99000);
146 case 0x00040001: /* Allocate buffer */
147 stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
148 stl_le_phys(&s->dma_as, value + 16,
149 bcm2835_fb_get_size(&fbconfig));
152 case 0x00048001: /* Release buffer */
155 case 0x00040002: /* Blank screen */
158 case 0x00044003: /* Test physical display width/height */
159 case 0x00044004: /* Test virtual display width/height */
162 case 0x00048003: /* Set physical display width/height */
163 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
164 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
165 bcm2835_fb_validate_config(&fbconfig);
166 fbconfig_updated = true;
168 case 0x00040003: /* Get physical display width/height */
169 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
170 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
173 case 0x00048004: /* Set virtual display width/height */
174 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
175 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
176 bcm2835_fb_validate_config(&fbconfig);
177 fbconfig_updated = true;
179 case 0x00040004: /* Get virtual display width/height */
180 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
181 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
184 case 0x00044005: /* Test depth */
187 case 0x00048005: /* Set depth */
188 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
189 bcm2835_fb_validate_config(&fbconfig);
190 fbconfig_updated = true;
192 case 0x00040005: /* Get depth */
193 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
196 case 0x00044006: /* Test pixel order */
199 case 0x00048006: /* Set pixel order */
200 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
201 bcm2835_fb_validate_config(&fbconfig);
202 fbconfig_updated = true;
204 case 0x00040006: /* Get pixel order */
205 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
208 case 0x00044007: /* Test pixel alpha */
211 case 0x00048007: /* Set alpha */
212 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
213 bcm2835_fb_validate_config(&fbconfig);
214 fbconfig_updated = true;
216 case 0x00040007: /* Get alpha */
217 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
220 case 0x00040008: /* Get pitch */
221 stl_le_phys(&s->dma_as, value + 12,
222 bcm2835_fb_get_pitch(&fbconfig));
225 case 0x00044009: /* Test virtual offset */
228 case 0x00048009: /* Set virtual offset */
229 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
230 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
231 bcm2835_fb_validate_config(&fbconfig);
232 fbconfig_updated = true;
234 case 0x00040009: /* Get virtual offset */
235 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
236 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
239 case 0x0004000a: /* Get/Test/Set overscan */
242 stl_le_phys(&s->dma_as, value + 12, 0);
243 stl_le_phys(&s->dma_as, value + 16, 0);
244 stl_le_phys(&s->dma_as, value + 20, 0);
245 stl_le_phys(&s->dma_as, value + 24, 0);
248 case 0x0004800b: /* Set palette */
249 offset = ldl_le_phys(&s->dma_as, value + 12);
250 length = ldl_le_phys(&s->dma_as, value + 16);
252 while (n < length - offset) {
253 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
254 stl_le_phys(&s->dma_as,
255 s->fbdev->vcram_base + ((offset + n) << 2), color);
258 stl_le_phys(&s->dma_as, value + 12, 0);
262 case 0x00060001: /* Get DMA channels */
264 stl_le_phys(&s->dma_as, value + 12, 0x003C);
268 case 0x00050001: /* Get command line */
273 qemu_log_mask(LOG_GUEST_ERROR,
274 "bcm2835_property: unhandled tag %08x\n", tag);
282 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
283 value += bufsize + 12;
286 /* Reconfigure framebuffer if required */
287 if (fbconfig_updated) {
288 bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
291 /* Buffer response code */
292 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
295 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
298 BCM2835PropertyState *s = opaque;
303 res = MBOX_CHAN_PROPERTY | s->addr;
305 qemu_set_irq(s->mbox_irq, 0);
308 case MBOX_AS_PENDING:
313 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
321 static void bcm2835_property_write(void *opaque, hwaddr offset,
322 uint64_t value, unsigned size)
324 BCM2835PropertyState *s = opaque;
328 /* bcm2835_mbox should check our pending status before pushing */
331 bcm2835_property_mbox_push(s, value);
332 qemu_set_irq(s->mbox_irq, 1);
336 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
342 static const MemoryRegionOps bcm2835_property_ops = {
343 .read = bcm2835_property_read,
344 .write = bcm2835_property_write,
345 .endianness = DEVICE_NATIVE_ENDIAN,
346 .valid.min_access_size = 4,
347 .valid.max_access_size = 4,
350 static const VMStateDescription vmstate_bcm2835_property = {
351 .name = TYPE_BCM2835_PROPERTY,
353 .minimum_version_id = 1,
354 .fields = (VMStateField[]) {
355 VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
356 VMSTATE_UINT32(addr, BCM2835PropertyState),
357 VMSTATE_BOOL(pending, BCM2835PropertyState),
358 VMSTATE_END_OF_LIST()
362 static void bcm2835_property_init(Object *obj)
364 BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
366 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
367 TYPE_BCM2835_PROPERTY, 0x10);
368 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
369 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
372 static void bcm2835_property_reset(DeviceState *dev)
374 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
379 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
381 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
385 obj = object_property_get_link(OBJECT(dev), "fb", &err);
387 error_setg(errp, "%s: required fb link not found: %s",
388 __func__, error_get_pretty(err));
392 s->fbdev = BCM2835_FB(obj);
394 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
396 error_setg(errp, "%s: required dma-mr link not found: %s",
397 __func__, error_get_pretty(err));
401 s->dma_mr = MEMORY_REGION(obj);
402 address_space_init(&s->dma_as, s->dma_mr, NULL);
404 /* TODO: connect to MAC address of USB NIC device, once we emulate it */
405 qemu_macaddr_default_if_unset(&s->macaddr);
407 bcm2835_property_reset(dev);
410 static Property bcm2835_property_props[] = {
411 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
412 DEFINE_PROP_END_OF_LIST()
415 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
417 DeviceClass *dc = DEVICE_CLASS(klass);
419 dc->props = bcm2835_property_props;
420 dc->realize = bcm2835_property_realize;
421 dc->vmsd = &vmstate_bcm2835_property;
424 static TypeInfo bcm2835_property_info = {
425 .name = TYPE_BCM2835_PROPERTY,
426 .parent = TYPE_SYS_BUS_DEVICE,
427 .instance_size = sizeof(BCM2835PropertyState),
428 .class_init = bcm2835_property_class_init,
429 .instance_init = bcm2835_property_init,
432 static void bcm2835_property_register_types(void)
434 type_register_static(&bcm2835_property_info);
437 type_init(bcm2835_property_register_types)