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/*
* QEMU LASI NIC i82596 emulation
*
* Copyright (c) 2019 Helge Deller <deller@gmx.de>
* This work is licensed under the GNU GPL license version 2 or later.
*
*
* On PA-RISC, this is the Network part of LASI chip.
* See:
* https://parisc.wiki.kernel.org/images-parisc/7/79/Lasi_ers.pdf
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/timer.h"
#include "hw/sysbus.h"
#include "net/eth.h"
#include "hw/net/lasi_82596.h"
#include "hw/net/i82596.h"
#include "trace.h"
#include "sysemu/sysemu.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/
#define PA_CPU_PORT_L_ACCESS 4
#define PA_CHANNEL_ATTENTION 8
#define PA_GET_MACADDR 12
#define SWAP32(x) (((uint32_t)(x) << 16) | ((((uint32_t)(x))) >> 16))
static void lasi_82596_mem_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SysBusI82596State *d = opaque;
trace_lasi_82596_mem_writew(addr, val);
switch (addr) {
case PA_I82596_RESET:
i82596_h_reset(&d->state);
break;
case PA_CPU_PORT_L_ACCESS:
d->val_index++;
if (d->val_index == 0) {
uint32_t v = d->last_val | (val << 16);
v = v & ~0xff;
i82596_ioport_writew(&d->state, d->last_val & 0xff, v);
}
d->last_val = val;
break;
case PA_CHANNEL_ATTENTION:
i82596_ioport_writew(&d->state, PORT_CA, val);
break;
case PA_GET_MACADDR:
/*
* Provided for SeaBIOS only. Write MAC of Network card to addr @val.
* Needed for the PDC_LAN_STATION_ID_READ PDC call.
*/
address_space_write(&address_space_memory, val,
MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a,
ETH_ALEN);
break;
}
}
static uint64_t lasi_82596_mem_read(void *opaque, hwaddr addr,
unsigned size)
{
SysBusI82596State *d = opaque;
uint32_t val;
if (addr == PA_GET_MACADDR) {
val = 0xBEEFBABE;
} else {
val = i82596_ioport_readw(&d->state, addr);
}
trace_lasi_82596_mem_readw(addr, val);
return val;
}
static const MemoryRegionOps lasi_82596_mem_ops = {
.read = lasi_82596_mem_read,
.write = lasi_82596_mem_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static NetClientInfo net_lasi_82596_info = {
.type = NET_CLIENT_DRIVER_NIC,
.size = sizeof(NICState),
.can_receive = i82596_can_receive,
.receive = i82596_receive,
.link_status_changed = i82596_set_link_status,
};
static const VMStateDescription vmstate_lasi_82596 = {
.name = "i82596",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596,
I82596State),
VMSTATE_END_OF_LIST()
}
};
static void lasi_82596_realize(DeviceState *dev, Error **errp)
{
SysBusI82596State *d = SYSBUS_I82596(dev);
I82596State *s = &d->state;
memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d,
"lasi_82596-mmio", PA_GET_MACADDR + 4);
i82596_common_init(dev, s, &net_lasi_82596_info);
}
SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space,
hwaddr hpa, qemu_irq lan_irq)
{
DeviceState *dev;
SysBusI82596State *s;
static const MACAddr HP_MAC = {
.a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } };
qemu_check_nic_model(&nd_table[0], TYPE_LASI_82596);
dev = qdev_new(TYPE_LASI_82596);
s = SYSBUS_I82596(dev);
s->state.irq = lan_irq;
qdev_set_nic_properties(dev, &nd_table[0]);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */
/* LASI 82596 ports in main memory. */
memory_region_add_subregion(addr_space, hpa, &s->state.mmio);
return s;
}
static void lasi_82596_reset(DeviceState *dev)
{
SysBusI82596State *d = SYSBUS_I82596(dev);
i82596_h_reset(&d->state);
}
static void lasi_82596_instance_init(Object *obj)
{
SysBusI82596State *d = SYSBUS_I82596(obj);
I82596State *s = &d->state;
device_add_bootindex_property(obj, &s->conf.bootindex,
"bootindex", "/ethernet-phy@0",
DEVICE(obj));
}
static Property lasi_82596_properties[] = {
DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf),
DEFINE_PROP_END_OF_LIST(),
};
static void lasi_82596_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = lasi_82596_realize;
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
dc->fw_name = "ethernet";
dc->reset = lasi_82596_reset;
dc->vmsd = &vmstate_lasi_82596;
dc->user_creatable = false;
device_class_set_props(dc, lasi_82596_properties);
}
static const TypeInfo lasi_82596_info = {
.name = TYPE_LASI_82596,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SysBusI82596State),
.class_init = lasi_82596_class_init,
.instance_init = lasi_82596_instance_init,
};
static void lasi_82596_register_types(void)
{
type_register_static(&lasi_82596_info);
}
type_init(lasi_82596_register_types)
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