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/*
* SMSC LAN9118 PHY emulation
*
* Copyright (c) 2009 CodeSourcery, LLC.
* Written by Paul Brook
*
* Copyright (c) 2013 Jean-Christophe Dubois. <jcd@tribudubois.net>
*
* This code is licensed under the GNU GPL v2
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/net/lan9118_phy.h"
#include "hw/irq.h"
#include "hw/resettable.h"
#include "migration/vmstate.h"
#include "qemu/log.h"
#include "trace.h"
#define PHY_INT_ENERGYON (1 << 7)
#define PHY_INT_AUTONEG_COMPLETE (1 << 6)
#define PHY_INT_FAULT (1 << 5)
#define PHY_INT_DOWN (1 << 4)
#define PHY_INT_AUTONEG_LP (1 << 3)
#define PHY_INT_PARFAULT (1 << 2)
#define PHY_INT_AUTONEG_PAGE (1 << 1)
static void lan9118_phy_update_irq(Lan9118PhyState *s)
{
qemu_set_irq(s->irq, !!(s->ints & s->int_mask));
}
uint16_t lan9118_phy_read(Lan9118PhyState *s, int reg)
{
uint16_t val;
switch (reg) {
case 0: /* Basic Control */
val = s->control;
break;
case 1: /* Basic Status */
val = s->status;
break;
case 2: /* ID1 */
val = 0x0007;
break;
case 3: /* ID2 */
val = 0xc0d1;
break;
case 4: /* Auto-neg advertisement */
val = s->advertise;
break;
case 5: /* Auto-neg Link Partner Ability */
val = 0x0fe1;
break;
case 6: /* Auto-neg Expansion */
val = 1;
break;
case 29: /* Interrupt source. */
val = s->ints;
s->ints = 0;
lan9118_phy_update_irq(s);
break;
case 30: /* Interrupt mask */
val = s->int_mask;
break;
case 17:
case 18:
case 27:
case 31:
qemu_log_mask(LOG_UNIMP, "%s: reg %d not implemented\n",
__func__, reg);
val = 0;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad address at offset %d\n",
__func__, reg);
val = 0;
break;
}
trace_lan9118_phy_read(val, reg);
return val;
}
void lan9118_phy_write(Lan9118PhyState *s, int reg, uint16_t val)
{
trace_lan9118_phy_write(val, reg);
switch (reg) {
case 0: /* Basic Control */
if (val & 0x8000) {
lan9118_phy_reset(s);
} else {
s->control = val & 0x7980;
/* Complete autonegotiation immediately. */
if (val & 0x1000) {
s->status |= 0x0020;
}
}
break;
case 4: /* Auto-neg advertisement */
s->advertise = (val & 0x2d7f) | 0x80;
break;
case 30: /* Interrupt mask */
s->int_mask = val & 0xff;
lan9118_phy_update_irq(s);
break;
case 17:
case 18:
case 27:
case 31:
qemu_log_mask(LOG_UNIMP, "%s: reg %d not implemented\n",
__func__, reg);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad address at offset %d\n",
__func__, reg);
break;
}
}
void lan9118_phy_update_link(Lan9118PhyState *s, bool link_down)
{
s->link_down = link_down;
/* Autonegotiation status mirrors link status. */
if (link_down) {
trace_lan9118_phy_update_link("down");
s->status &= ~0x0024;
s->ints |= PHY_INT_DOWN;
} else {
trace_lan9118_phy_update_link("up");
s->status |= 0x0024;
s->ints |= PHY_INT_ENERGYON;
s->ints |= PHY_INT_AUTONEG_COMPLETE;
}
lan9118_phy_update_irq(s);
}
void lan9118_phy_reset(Lan9118PhyState *s)
{
trace_lan9118_phy_reset();
s->control = 0x3000;
s->status = 0x7809;
s->advertise = 0x01e1;
s->int_mask = 0;
s->ints = 0;
lan9118_phy_update_link(s, s->link_down);
}
static void lan9118_phy_reset_hold(Object *obj, ResetType type)
{
Lan9118PhyState *s = LAN9118_PHY(obj);
lan9118_phy_reset(s);
}
static void lan9118_phy_init(Object *obj)
{
Lan9118PhyState *s = LAN9118_PHY(obj);
qdev_init_gpio_out(DEVICE(s), &s->irq, 1);
}
static const VMStateDescription vmstate_lan9118_phy = {
.name = "lan9118-phy",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT16(status, Lan9118PhyState),
VMSTATE_UINT16(control, Lan9118PhyState),
VMSTATE_UINT16(advertise, Lan9118PhyState),
VMSTATE_UINT16(ints, Lan9118PhyState),
VMSTATE_UINT16(int_mask, Lan9118PhyState),
VMSTATE_BOOL(link_down, Lan9118PhyState),
VMSTATE_END_OF_LIST()
}
};
static void lan9118_phy_class_init(ObjectClass *klass, void *data)
{
ResettableClass *rc = RESETTABLE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
rc->phases.hold = lan9118_phy_reset_hold;
dc->vmsd = &vmstate_lan9118_phy;
}
static const TypeInfo types[] = {
{
.name = TYPE_LAN9118_PHY,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Lan9118PhyState),
.instance_init = lan9118_phy_init,
.class_init = lan9118_phy_class_init,
}
};
DEFINE_TYPES(types)
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