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"
12 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
14 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
22 uint32_t offset, length, color;
23 uint32_t xres, yres, xoffset, yoffset, bpp, pixo, alpha;
24 uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
25 *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
31 tot_len = ldl_le_phys(&s->dma_as, value);
33 /* @(addr + 4) : Buffer response code */
35 while (value + 8 <= s->addr + tot_len) {
36 tag = ldl_le_phys(&s->dma_as, value);
37 bufsize = ldl_le_phys(&s->dma_as, value + 4);
38 /* @(value + 8) : Request/response indicator */
41 case 0x00000000: /* End tag */
43 case 0x00000001: /* Get firmware revision */
44 stl_le_phys(&s->dma_as, value + 12, 346337);
47 case 0x00010001: /* Get board model */
48 qemu_log_mask(LOG_UNIMP,
49 "bcm2835_property: %x get board model NYI\n", tag);
52 case 0x00010002: /* Get board revision */
53 stl_le_phys(&s->dma_as, value + 12, s->board_rev);
56 case 0x00010003: /* Get board MAC address */
57 resplen = sizeof(s->macaddr.a);
58 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
60 case 0x00010004: /* Get board serial */
61 qemu_log_mask(LOG_UNIMP,
62 "bcm2835_property: %x get board serial NYI\n", tag);
65 case 0x00010005: /* Get ARM memory */
67 stl_le_phys(&s->dma_as, value + 12, 0);
69 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
72 case 0x00010006: /* Get VC memory */
74 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
76 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
79 case 0x00028001: /* Set power state */
80 /* Assume that whatever device they asked for exists,
81 * and we'll just claim we set it to the desired state
83 tmp = ldl_le_phys(&s->dma_as, value + 16);
84 stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
90 case 0x00030001: /* Get clock state */
91 stl_le_phys(&s->dma_as, value + 16, 0x1);
95 case 0x00038001: /* Set clock state */
96 qemu_log_mask(LOG_UNIMP,
97 "bcm2835_property: %x set clock state NYI\n", tag);
101 case 0x00030002: /* Get clock rate */
102 case 0x00030004: /* Get max clock rate */
103 case 0x00030007: /* Get min clock rate */
104 switch (ldl_le_phys(&s->dma_as, value + 12)) {
106 stl_le_phys(&s->dma_as, value + 16, 50000000);
109 stl_le_phys(&s->dma_as, value + 16, 3000000);
112 stl_le_phys(&s->dma_as, value + 16, 700000000);
118 case 0x00038002: /* Set clock rate */
119 case 0x00038004: /* Set max clock rate */
120 case 0x00038007: /* Set min clock rate */
121 qemu_log_mask(LOG_UNIMP,
122 "bcm2835_property: %x set clock rates NYI\n", tag);
128 case 0x00030006: /* Get temperature */
129 stl_le_phys(&s->dma_as, value + 16, 25000);
133 case 0x0003000A: /* Get max temperature */
134 stl_le_phys(&s->dma_as, value + 16, 99000);
140 case 0x00040001: /* Allocate buffer */
141 stl_le_phys(&s->dma_as, value + 12, s->fbdev->base);
142 stl_le_phys(&s->dma_as, value + 16, s->fbdev->size);
145 case 0x00048001: /* Release buffer */
148 case 0x00040002: /* Blank screen */
151 case 0x00040003: /* Get display width/height */
153 stl_le_phys(&s->dma_as, value + 12, s->fbdev->xres);
154 stl_le_phys(&s->dma_as, value + 16, s->fbdev->yres);
157 case 0x00044003: /* Test display width/height */
161 case 0x00048003: /* Set display width/height */
163 xres = ldl_le_phys(&s->dma_as, value + 12);
165 yres = ldl_le_phys(&s->dma_as, value + 16);
169 case 0x00040005: /* Get depth */
170 stl_le_phys(&s->dma_as, value + 12, s->fbdev->bpp);
173 case 0x00044005: /* Test depth */
176 case 0x00048005: /* Set depth */
177 bpp = ldl_le_phys(&s->dma_as, value + 12);
181 case 0x00040006: /* Get pixel order */
182 stl_le_phys(&s->dma_as, value + 12, s->fbdev->pixo);
185 case 0x00044006: /* Test pixel order */
188 case 0x00048006: /* Set pixel order */
189 pixo = ldl_le_phys(&s->dma_as, value + 12);
193 case 0x00040007: /* Get alpha */
194 stl_le_phys(&s->dma_as, value + 12, s->fbdev->alpha);
197 case 0x00044007: /* Test pixel alpha */
200 case 0x00048007: /* Set alpha */
201 alpha = ldl_le_phys(&s->dma_as, value + 12);
205 case 0x00040008: /* Get pitch */
206 stl_le_phys(&s->dma_as, value + 12, s->fbdev->pitch);
209 case 0x00040009: /* Get virtual offset */
210 stl_le_phys(&s->dma_as, value + 12, s->fbdev->xoffset);
211 stl_le_phys(&s->dma_as, value + 16, s->fbdev->yoffset);
214 case 0x00044009: /* Test virtual offset */
217 case 0x00048009: /* Set virtual offset */
218 xoffset = ldl_le_phys(&s->dma_as, value + 12);
219 newxoffset = &xoffset;
220 yoffset = ldl_le_phys(&s->dma_as, value + 16);
221 newyoffset = &yoffset;
224 case 0x0004000a: /* Get/Test/Set overscan */
227 stl_le_phys(&s->dma_as, value + 12, 0);
228 stl_le_phys(&s->dma_as, value + 16, 0);
229 stl_le_phys(&s->dma_as, value + 20, 0);
230 stl_le_phys(&s->dma_as, value + 24, 0);
233 case 0x0004800b: /* Set palette */
234 offset = ldl_le_phys(&s->dma_as, value + 12);
235 length = ldl_le_phys(&s->dma_as, value + 16);
237 while (n < length - offset) {
238 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
239 stl_le_phys(&s->dma_as,
240 s->fbdev->vcram_base + ((offset + n) << 2), color);
243 stl_le_phys(&s->dma_as, value + 12, 0);
247 case 0x00060001: /* Get DMA channels */
249 stl_le_phys(&s->dma_as, value + 12, 0x003C);
253 case 0x00050001: /* Get command line */
258 qemu_log_mask(LOG_GUEST_ERROR,
259 "bcm2835_property: unhandled tag %08x\n", tag);
267 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
268 value += bufsize + 12;
271 /* Reconfigure framebuffer if required */
272 if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
274 bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
275 newyoffset, newbpp, newpixo, newalpha);
278 /* Buffer response code */
279 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
282 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
285 BCM2835PropertyState *s = opaque;
290 res = MBOX_CHAN_PROPERTY | s->addr;
292 qemu_set_irq(s->mbox_irq, 0);
295 case MBOX_AS_PENDING:
300 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
308 static void bcm2835_property_write(void *opaque, hwaddr offset,
309 uint64_t value, unsigned size)
311 BCM2835PropertyState *s = opaque;
315 /* bcm2835_mbox should check our pending status before pushing */
318 bcm2835_property_mbox_push(s, value);
319 qemu_set_irq(s->mbox_irq, 1);
323 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
329 static const MemoryRegionOps bcm2835_property_ops = {
330 .read = bcm2835_property_read,
331 .write = bcm2835_property_write,
332 .endianness = DEVICE_NATIVE_ENDIAN,
333 .valid.min_access_size = 4,
334 .valid.max_access_size = 4,
337 static const VMStateDescription vmstate_bcm2835_property = {
338 .name = TYPE_BCM2835_PROPERTY,
340 .minimum_version_id = 1,
341 .fields = (VMStateField[]) {
342 VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
343 VMSTATE_UINT32(addr, BCM2835PropertyState),
344 VMSTATE_BOOL(pending, BCM2835PropertyState),
345 VMSTATE_END_OF_LIST()
349 static void bcm2835_property_init(Object *obj)
351 BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
353 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
354 TYPE_BCM2835_PROPERTY, 0x10);
355 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
356 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
359 static void bcm2835_property_reset(DeviceState *dev)
361 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
366 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
368 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
372 obj = object_property_get_link(OBJECT(dev), "fb", &err);
374 error_setg(errp, "%s: required fb link not found: %s",
375 __func__, error_get_pretty(err));
379 s->fbdev = BCM2835_FB(obj);
381 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
383 error_setg(errp, "%s: required dma-mr link not found: %s",
384 __func__, error_get_pretty(err));
388 s->dma_mr = MEMORY_REGION(obj);
389 address_space_init(&s->dma_as, s->dma_mr, NULL);
391 /* TODO: connect to MAC address of USB NIC device, once we emulate it */
392 qemu_macaddr_default_if_unset(&s->macaddr);
394 bcm2835_property_reset(dev);
397 static Property bcm2835_property_props[] = {
398 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
399 DEFINE_PROP_END_OF_LIST()
402 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
404 DeviceClass *dc = DEVICE_CLASS(klass);
406 dc->props = bcm2835_property_props;
407 dc->realize = bcm2835_property_realize;
408 dc->vmsd = &vmstate_bcm2835_property;
411 static TypeInfo bcm2835_property_info = {
412 .name = TYPE_BCM2835_PROPERTY,
413 .parent = TYPE_SYS_BUS_DEVICE,
414 .instance_size = sizeof(BCM2835PropertyState),
415 .class_init = bcm2835_property_class_init,
416 .instance_init = bcm2835_property_init,
419 static void bcm2835_property_register_types(void)
421 type_register_static(&bcm2835_property_info);
424 type_init(bcm2835_property_register_types)