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bcm2835_property: add bcm2835 property channel 

This sits behind the mailbox interface, and implements
request/response queries for system properties. The
framebuffer-related properties will be added in a later patch.

Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Baumann 2016-01-29 14:50:38 -08:00 committed by Peter Maydell
parent 99494e696e
commit 04f1ab15b9
3 changed files with 319 additions and 0 deletions
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1
hw/misc/Makefile.objs
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@ -37,6 +37,7 @@ obj-$(CONFIG_OMAP) += omap_l4.o
obj-$(CONFIG_OMAP) += omap_sdrc.o
obj-$(CONFIG_OMAP) += omap_tap.o
obj-$(CONFIG_RASPI) += bcm2835_mbox.o
obj-$(CONFIG_RASPI) += bcm2835_property.o
obj-$(CONFIG_SLAVIO) += slavio_misc.o
obj-$(CONFIG_ZYNQ) += zynq_slcr.o
obj-$(CONFIG_ZYNQ) += zynq-xadc.o

287
hw/misc/bcm2835_property.c Normal file
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@ -0,0 +1,287 @@
/*
* Raspberry Pi emulation (c) 2012 Gregory Estrade
* This code is licensed under the GNU GPLv2 and later.
*/
#include "hw/misc/bcm2835_property.h"
#include "hw/misc/bcm2835_mbox_defs.h"
#include "sysemu/dma.h"
/* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
{
uint32_t tag;
uint32_t bufsize;
uint32_t tot_len;
size_t resplen;
uint32_t tmp;
value &= ~0xf;
s->addr = value;
tot_len = ldl_phys(&s->dma_as, value);
/* @(addr + 4) : Buffer response code */
value = s->addr + 8;
while (value + 8 <= s->addr + tot_len) {
tag = ldl_phys(&s->dma_as, value);
bufsize = ldl_phys(&s->dma_as, value + 4);
/* @(value + 8) : Request/response indicator */
resplen = 0;
switch (tag) {
case 0x00000000: /* End tag */
break;
case 0x00000001: /* Get firmware revision */
stl_phys(&s->dma_as, value + 12, 346337);
resplen = 4;
break;
case 0x00010001: /* Get board model */
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: %x get board model NYI\n", tag);
resplen = 4;
break;
case 0x00010002: /* Get board revision */
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: %x get board revision NYI\n", tag);
resplen = 4;
break;
case 0x00010003: /* Get board MAC address */
resplen = sizeof(s->macaddr.a);
dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
break;
case 0x00010004: /* Get board serial */
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: %x get board serial NYI\n", tag);
resplen = 8;
break;
case 0x00010005: /* Get ARM memory */
/* base */
stl_phys(&s->dma_as, value + 12, 0);
/* size */
stl_phys(&s->dma_as, value + 16, s->ram_size);
resplen = 8;
break;
case 0x00028001: /* Set power state */
/* Assume that whatever device they asked for exists,
* and we'll just claim we set it to the desired state
*/
tmp = ldl_phys(&s->dma_as, value + 16);
stl_phys(&s->dma_as, value + 16, (tmp & 1));
resplen = 8;
break;
/* Clocks */
case 0x00030001: /* Get clock state */
stl_phys(&s->dma_as, value + 16, 0x1);
resplen = 8;
break;
case 0x00038001: /* Set clock state */
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: %x set clock state NYI\n", tag);
resplen = 8;
break;
case 0x00030002: /* Get clock rate */
case 0x00030004: /* Get max clock rate */
case 0x00030007: /* Get min clock rate */
switch (ldl_phys(&s->dma_as, value + 12)) {
case 1: /* EMMC */
stl_phys(&s->dma_as, value + 16, 50000000);
break;
case 2: /* UART */
stl_phys(&s->dma_as, value + 16, 3000000);
break;
default:
stl_phys(&s->dma_as, value + 16, 700000000);
break;
}
resplen = 8;
break;
case 0x00038002: /* Set clock rate */
case 0x00038004: /* Set max clock rate */
case 0x00038007: /* Set min clock rate */
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: %x set clock rates NYI\n", tag);
resplen = 8;
break;
/* Temperature */
case 0x00030006: /* Get temperature */
stl_phys(&s->dma_as, value + 16, 25000);
resplen = 8;
break;
case 0x0003000A: /* Get max temperature */
stl_phys(&s->dma_as, value + 16, 99000);
resplen = 8;
break;
case 0x00060001: /* Get DMA channels */
/* channels 2-5 */
stl_phys(&s->dma_as, value + 12, 0x003C);
resplen = 4;
break;
case 0x00050001: /* Get command line */
resplen = 0;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"bcm2835_property: unhandled tag %08x\n", tag);
break;
}
if (tag == 0) {
break;
}
stl_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
value += bufsize + 12;
}
/* Buffer response code */
stl_phys(&s->dma_as, s->addr + 4, (1 << 31));
}
static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
unsigned size)
{
BCM2835PropertyState *s = opaque;
uint32_t res = 0;
switch (offset) {
case MBOX_AS_DATA:
res = MBOX_CHAN_PROPERTY | s->addr;
s->pending = false;
qemu_set_irq(s->mbox_irq, 0);
break;
case MBOX_AS_PENDING:
res = s->pending;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
__func__, offset);
return 0;
}
return res;
}
static void bcm2835_property_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
BCM2835PropertyState *s = opaque;
switch (offset) {
case MBOX_AS_DATA:
/* bcm2835_mbox should check our pending status before pushing */
assert(!s->pending);
s->pending = true;
bcm2835_property_mbox_push(s, value);
qemu_set_irq(s->mbox_irq, 1);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
__func__, offset);
return;
}
}
static const MemoryRegionOps bcm2835_property_ops = {
.read = bcm2835_property_read,
.write = bcm2835_property_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
};
static const VMStateDescription vmstate_bcm2835_property = {
.name = TYPE_BCM2835_PROPERTY,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
VMSTATE_UINT32(addr, BCM2835PropertyState),
VMSTATE_BOOL(pending, BCM2835PropertyState),
VMSTATE_END_OF_LIST()
}
};
static void bcm2835_property_init(Object *obj)
{
BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
TYPE_BCM2835_PROPERTY, 0x10);
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
}
static void bcm2835_property_reset(DeviceState *dev)
{
BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
s->pending = false;
}
static void bcm2835_property_realize(DeviceState *dev, Error **errp)
{
BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
Object *obj;
Error *err = NULL;
obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
if (obj == NULL) {
error_setg(errp, "%s: required dma-mr link not found: %s",
__func__, error_get_pretty(err));
return;
}
s->dma_mr = MEMORY_REGION(obj);
address_space_init(&s->dma_as, s->dma_mr, NULL);
/* TODO: connect to MAC address of USB NIC device, once we emulate it */
qemu_macaddr_default_if_unset(&s->macaddr);
bcm2835_property_reset(dev);
}
static Property bcm2835_property_props[] = {
DEFINE_PROP_UINT32("ram-size", BCM2835PropertyState, ram_size, 0),
DEFINE_PROP_END_OF_LIST()
};
static void bcm2835_property_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = bcm2835_property_props;
dc->realize = bcm2835_property_realize;
dc->vmsd = &vmstate_bcm2835_property;
}
static TypeInfo bcm2835_property_info = {
.name = TYPE_BCM2835_PROPERTY,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(BCM2835PropertyState),
.class_init = bcm2835_property_class_init,
.instance_init = bcm2835_property_init,
};
static void bcm2835_property_register_types(void)
{
type_register_static(&bcm2835_property_info);
}
type_init(bcm2835_property_register_types)

31
include/hw/misc/bcm2835_property.h Normal file
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@ -0,0 +1,31 @@
/*
* Raspberry Pi emulation (c) 2012 Gregory Estrade
* This code is licensed under the GNU GPLv2 and later.
*/
#ifndef BCM2835_PROPERTY_H
#define BCM2835_PROPERTY_H
#include "hw/sysbus.h"
#include "exec/address-spaces.h"
#include "net/net.h"
#define TYPE_BCM2835_PROPERTY "bcm2835-property"
#define BCM2835_PROPERTY(obj) \
OBJECT_CHECK(BCM2835PropertyState, (obj), TYPE_BCM2835_PROPERTY)
typedef struct {
/*< private >*/
SysBusDevice busdev;
/*< public >*/
MemoryRegion *dma_mr;
AddressSpace dma_as;
MemoryRegion iomem;
qemu_irq mbox_irq;
MACAddr macaddr;
uint32_t ram_size;
uint32_t addr;
bool pending;
} BCM2835PropertyState;
#endif