/*
* MIOe-3680 PCI CAN device (SJA1000 based) emulation
*
* Copyright (c) 2016 Deniz Eren (deniz.eren@icloud.com)
*
* Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
* Jin Yang and Pavel Pisa
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/event_notifier.h"
#include "qemu/module.h"
#include "qemu/thread.h"
#include "qemu/sockets.h"
#include "qapi/error.h"
#include "chardev/char.h"
#include "hw/irq.h"
#include "hw/pci/pci.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "net/can_emu.h"
#include "can_sja1000.h"
#define TYPE_CAN_PCI_DEV "mioe3680_pci"
#define MIOe3680_PCI_DEV(obj) \
OBJECT_CHECK(Mioe3680PCIState, (obj), TYPE_CAN_PCI_DEV)
/* the PCI device and vendor IDs */
#ifndef MIOe3680_PCI_VENDOR_ID1
#define MIOe3680_PCI_VENDOR_ID1 0x13fe
#endif
#ifndef MIOe3680_PCI_DEVICE_ID1
#define MIOe3680_PCI_DEVICE_ID1 0xc302
#endif
#define MIOe3680_PCI_SJA_COUNT 2
#define MIOe3680_PCI_SJA_RANGE 0x400
#define MIOe3680_PCI_BYTES_PER_SJA 0x80
typedef struct Mioe3680PCIState {
/*< private >*/
PCIDevice dev;
/*< public >*/
MemoryRegion sja_io[MIOe3680_PCI_SJA_COUNT];
CanSJA1000State sja_state[MIOe3680_PCI_SJA_COUNT];
qemu_irq irq;
char *model; /* The model that support, only SJA1000 now. */
CanBusState *canbus[MIOe3680_PCI_SJA_COUNT];
} Mioe3680PCIState;
static void mioe3680_pci_reset(DeviceState *dev)
{
Mioe3680PCIState *d = MIOe3680_PCI_DEV(dev);
int i;
for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
can_sja_hardware_reset(&d->sja_state[i]);
}
}
static uint64_t mioe3680_pci_sja1_io_read(void *opaque, hwaddr addr,
unsigned size)
{
Mioe3680PCIState *d = opaque;
CanSJA1000State *s = &d->sja_state[0];
if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
return 0;
}
return can_sja_mem_read(s, addr >> 2, size);
}
static void mioe3680_pci_sja1_io_write(void *opaque, hwaddr addr, uint64_t data,
unsigned size)
{
Mioe3680PCIState *d = opaque;
CanSJA1000State *s = &d->sja_state[0];
if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
return;
}
can_sja_mem_write(s, addr >> 2, data, size);
}
static uint64_t mioe3680_pci_sja2_io_read(void *opaque, hwaddr addr,
unsigned size)
{
Mioe3680PCIState *d = opaque;
CanSJA1000State *s = &d->sja_state[1];
if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
return 0;
}
return can_sja_mem_read(s, addr >> 2, size);
}
static void mioe3680_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
unsigned size)
{
Mioe3680PCIState *d = opaque;
CanSJA1000State *s = &d->sja_state[1];
if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
return;
}
can_sja_mem_write(s, addr >> 2, data, size);
}
static const MemoryRegionOps mioe3680_pci_sja1_io_ops = {
.read = mioe3680_pci_sja1_io_read,
.write = mioe3680_pci_sja1_io_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.max_access_size = 1,
},
};
static const MemoryRegionOps mioe3680_pci_sja2_io_ops = {
.read = mioe3680_pci_sja2_io_read,
.write = mioe3680_pci_sja2_io_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.max_access_size = 1,
},
};
static void mioe3680_pci_realize(PCIDevice *pci_dev, Error **errp)
{
Mioe3680PCIState *d = MIOe3680_PCI_DEV(pci_dev);
uint8_t *pci_conf;
int i;
pci_conf = pci_dev->config;
pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */
d->irq = pci_allocate_irq(&d->dev);
for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
can_sja_init(&d->sja_state[i], d->irq);
}
for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) {
error_setg(errp, "can_sja_connect_to_bus failed");
return;
}
}
memory_region_init_io(&d->sja_io[0], OBJECT(d), &mioe3680_pci_sja1_io_ops,
d, "mioe3680_pci-sja1", MIOe3680_PCI_SJA_RANGE);
memory_region_init_io(&d->sja_io[1], OBJECT(d), &mioe3680_pci_sja2_io_ops,
d, "mioe3680_pci-sja2", MIOe3680_PCI_SJA_RANGE);
for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO,
&d->sja_io[i]);
}
}
static void mioe3680_pci_exit(PCIDevice *pci_dev)
{
Mioe3680PCIState *d = MIOe3680_PCI_DEV(pci_dev);
int i;
for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
can_sja_disconnect(&d->sja_state[i]);
}
qemu_free_irq(d->irq);
}
static const VMStateDescription vmstate_mioe3680_pci = {
.name = "mioe3680_pci",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, Mioe3680PCIState),
VMSTATE_STRUCT(sja_state[0], Mioe3680PCIState, 0, vmstate_can_sja,
CanSJA1000State),
VMSTATE_STRUCT(sja_state[1], Mioe3680PCIState, 0, vmstate_can_sja,
CanSJA1000State),
VMSTATE_END_OF_LIST()
}
};
static void mioe3680_pci_instance_init(Object *obj)
{
Mioe3680PCIState *d = MIOe3680_PCI_DEV(obj);
object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
(Object **)&d->canbus[0],
qdev_prop_allow_set_link_before_realize,
0);
object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
(Object **)&d->canbus[1],
qdev_prop_allow_set_link_before_realize,
0);
}
static void mioe3680_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = mioe3680_pci_realize;
k->exit = mioe3680_pci_exit;
k->vendor_id = MIOe3680_PCI_VENDOR_ID1;
k->device_id = MIOe3680_PCI_DEVICE_ID1;
k->revision = 0x00;
k->class_id = 0x000c09;
k->subsystem_vendor_id = MIOe3680_PCI_VENDOR_ID1;
k->subsystem_id = MIOe3680_PCI_DEVICE_ID1;
dc->desc = "Mioe3680 PCICANx";
dc->vmsd = &vmstate_mioe3680_pci;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
dc->reset = mioe3680_pci_reset;
}
static const TypeInfo mioe3680_pci_info = {
.name = TYPE_CAN_PCI_DEV,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(Mioe3680PCIState),
.class_init = mioe3680_pci_class_init,
.instance_init = mioe3680_pci_instance_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void mioe3680_pci_register_types(void)
{
type_register_static(&mioe3680_pci_info);
}
type_init(mioe3680_pci_register_types)
