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 tmp_xres, tmp_yres, tmp_xoffset, tmp_yoffset;
25 uint32_t tmp_bpp, tmp_pixo, tmp_alpha;
26 uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
27 *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
33 tot_len = ldl_le_phys(&s->dma_as, value);
35 /* @(addr + 4) : Buffer response code */
37 while (value + 8 <= s->addr + tot_len) {
38 tag = ldl_le_phys(&s->dma_as, value);
39 bufsize = ldl_le_phys(&s->dma_as, value + 4);
40 /* @(value + 8) : Request/response indicator */
43 case 0x00000000: /* End tag */
45 case 0x00000001: /* Get firmware revision */
46 stl_le_phys(&s->dma_as, value + 12, 346337);
49 case 0x00010001: /* Get board model */
50 qemu_log_mask(LOG_UNIMP,
51 "bcm2835_property: %x get board model NYI\n", tag);
54 case 0x00010002: /* Get board revision */
55 stl_le_phys(&s->dma_as, value + 12, s->board_rev);
58 case 0x00010003: /* Get board MAC address */
59 resplen = sizeof(s->macaddr.a);
60 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
62 case 0x00010004: /* Get board serial */
63 qemu_log_mask(LOG_UNIMP,
64 "bcm2835_property: %x get board serial NYI\n", tag);
67 case 0x00010005: /* Get ARM memory */
69 stl_le_phys(&s->dma_as, value + 12, 0);
71 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
74 case 0x00010006: /* Get VC memory */
76 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
78 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
81 case 0x00028001: /* Set power state */
82 /* Assume that whatever device they asked for exists,
83 * and we'll just claim we set it to the desired state
85 tmp = ldl_le_phys(&s->dma_as, value + 16);
86 stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
92 case 0x00030001: /* Get clock state */
93 stl_le_phys(&s->dma_as, value + 16, 0x1);
97 case 0x00038001: /* Set clock state */
98 qemu_log_mask(LOG_UNIMP,
99 "bcm2835_property: %x set clock state NYI\n", tag);
103 case 0x00030002: /* Get clock rate */
104 case 0x00030004: /* Get max clock rate */
105 case 0x00030007: /* Get min clock rate */
106 switch (ldl_le_phys(&s->dma_as, value + 12)) {
108 stl_le_phys(&s->dma_as, value + 16, 50000000);
111 stl_le_phys(&s->dma_as, value + 16, 3000000);
114 stl_le_phys(&s->dma_as, value + 16, 700000000);
120 case 0x00038002: /* Set clock rate */
121 case 0x00038004: /* Set max clock rate */
122 case 0x00038007: /* Set min clock rate */
123 qemu_log_mask(LOG_UNIMP,
124 "bcm2835_property: %x set clock rates NYI\n", tag);
130 case 0x00030006: /* Get temperature */
131 stl_le_phys(&s->dma_as, value + 16, 25000);
135 case 0x0003000A: /* Get max temperature */
136 stl_le_phys(&s->dma_as, value + 16, 99000);
142 case 0x00040001: /* Allocate buffer */
143 stl_le_phys(&s->dma_as, value + 12, s->fbdev->base);
144 tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
145 tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
146 tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
147 stl_le_phys(&s->dma_as, value + 16,
148 tmp_xres * tmp_yres * tmp_bpp / 8);
151 case 0x00048001: /* Release buffer */
154 case 0x00040002: /* Blank screen */
157 case 0x00040003: /* Get display width/height */
159 tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
160 tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
161 stl_le_phys(&s->dma_as, value + 12, tmp_xres);
162 stl_le_phys(&s->dma_as, value + 16, tmp_yres);
165 case 0x00044003: /* Test display width/height */
169 case 0x00048003: /* Set display width/height */
171 xres = ldl_le_phys(&s->dma_as, value + 12);
173 yres = ldl_le_phys(&s->dma_as, value + 16);
177 case 0x00040005: /* Get depth */
178 tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
179 stl_le_phys(&s->dma_as, value + 12, tmp_bpp);
182 case 0x00044005: /* Test depth */
185 case 0x00048005: /* Set depth */
186 bpp = ldl_le_phys(&s->dma_as, value + 12);
190 case 0x00040006: /* Get pixel order */
191 tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->pixo;
192 stl_le_phys(&s->dma_as, value + 12, tmp_pixo);
195 case 0x00044006: /* Test pixel order */
198 case 0x00048006: /* Set pixel order */
199 pixo = ldl_le_phys(&s->dma_as, value + 12);
203 case 0x00040007: /* Get alpha */
204 tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->alpha;
205 stl_le_phys(&s->dma_as, value + 12, tmp_alpha);
208 case 0x00044007: /* Test pixel alpha */
211 case 0x00048007: /* Set alpha */
212 alpha = ldl_le_phys(&s->dma_as, value + 12);
216 case 0x00040008: /* Get pitch */
217 tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
218 tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
219 stl_le_phys(&s->dma_as, value + 12, tmp_xres * tmp_bpp / 8);
222 case 0x00040009: /* Get virtual offset */
223 tmp_xoffset = newxoffset != NULL ? *newxoffset : s->fbdev->xoffset;
224 tmp_yoffset = newyoffset != NULL ? *newyoffset : s->fbdev->yoffset;
225 stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
226 stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
229 case 0x00044009: /* Test virtual offset */
232 case 0x00048009: /* Set virtual offset */
233 xoffset = ldl_le_phys(&s->dma_as, value + 12);
234 newxoffset = &xoffset;
235 yoffset = ldl_le_phys(&s->dma_as, value + 16);
236 newyoffset = &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 (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
289 bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
290 newyoffset, newbpp, newpixo, newalpha);
293 /* Buffer response code */
294 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
297 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
300 BCM2835PropertyState *s = opaque;
305 res = MBOX_CHAN_PROPERTY | s->addr;
307 qemu_set_irq(s->mbox_irq, 0);
310 case MBOX_AS_PENDING:
315 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
323 static void bcm2835_property_write(void *opaque, hwaddr offset,
324 uint64_t value, unsigned size)
326 BCM2835PropertyState *s = opaque;
330 /* bcm2835_mbox should check our pending status before pushing */
333 bcm2835_property_mbox_push(s, value);
334 qemu_set_irq(s->mbox_irq, 1);
338 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
344 static const MemoryRegionOps bcm2835_property_ops = {
345 .read = bcm2835_property_read,
346 .write = bcm2835_property_write,
347 .endianness = DEVICE_NATIVE_ENDIAN,
348 .valid.min_access_size = 4,
349 .valid.max_access_size = 4,
352 static const VMStateDescription vmstate_bcm2835_property = {
353 .name = TYPE_BCM2835_PROPERTY,
355 .minimum_version_id = 1,
356 .fields = (VMStateField[]) {
357 VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
358 VMSTATE_UINT32(addr, BCM2835PropertyState),
359 VMSTATE_BOOL(pending, BCM2835PropertyState),
360 VMSTATE_END_OF_LIST()
364 static void bcm2835_property_init(Object *obj)
366 BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
368 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
369 TYPE_BCM2835_PROPERTY, 0x10);
370 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
371 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
374 static void bcm2835_property_reset(DeviceState *dev)
376 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
381 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
383 BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
387 obj = object_property_get_link(OBJECT(dev), "fb", &err);
389 error_setg(errp, "%s: required fb link not found: %s",
390 __func__, error_get_pretty(err));
394 s->fbdev = BCM2835_FB(obj);
396 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
398 error_setg(errp, "%s: required dma-mr link not found: %s",
399 __func__, error_get_pretty(err));
403 s->dma_mr = MEMORY_REGION(obj);
404 address_space_init(&s->dma_as, s->dma_mr, NULL);
406 /* TODO: connect to MAC address of USB NIC device, once we emulate it */
407 qemu_macaddr_default_if_unset(&s->macaddr);
409 bcm2835_property_reset(dev);
412 static Property bcm2835_property_props[] = {
413 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
414 DEFINE_PROP_END_OF_LIST()
417 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
419 DeviceClass *dc = DEVICE_CLASS(klass);
421 dc->props = bcm2835_property_props;
422 dc->realize = bcm2835_property_realize;
423 dc->vmsd = &vmstate_bcm2835_property;
426 static TypeInfo bcm2835_property_info = {
427 .name = TYPE_BCM2835_PROPERTY,
428 .parent = TYPE_SYS_BUS_DEVICE,
429 .instance_size = sizeof(BCM2835PropertyState),
430 .class_init = bcm2835_property_class_init,
431 .instance_init = bcm2835_property_init,
434 static void bcm2835_property_register_types(void)
436 type_register_static(&bcm2835_property_info);
439 type_init(bcm2835_property_register_types)