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qemu/hw/input/lasips2.c
Mark Cave-Ayland 1b7bd0abe9 lasips2: update VMStateDescription for LASIPS2 device 
Since this series has already introduced a migration break for the HPPA B160L
machine, we can use this opportunity to improve the VMStateDescription for
the LASIPS2 device.

Add the new int_status field to the VMStateDescription and remodel the ports
as separate VMSTATE_STRUCT instances representing each LASIPS2Port. Once this
is done, the migration stream can be updated to include buf and loopback_rbne
for each port (which is necessary since the values are accessed across separate
IO accesses), and drop the port id as this is hardcoded for each port type.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20220712215251.7944-35-mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2022-07-18 19:28:46 +01:00

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/*
* QEMU HP Lasi PS/2 interface emulation
*
* Copyright (c) 2019 Sven Schnelle
*
* 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/log.h"
#include "hw/qdev-properties.h"
#include "hw/sysbus.h"
#include "hw/input/ps2.h"
#include "hw/input/lasips2.h"
#include "exec/hwaddr.h"
#include "trace.h"
#include "exec/address-spaces.h"
#include "migration/vmstate.h"
#include "hw/irq.h"
#include "qapi/error.h"
static const VMStateDescription vmstate_lasips2_port = {
.name = "lasips2-port",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(control, LASIPS2Port),
VMSTATE_UINT8(buf, LASIPS2Port),
VMSTATE_BOOL(loopback_rbne, LASIPS2Port),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_lasips2 = {
.name = "lasips2",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(int_status, LASIPS2State),
VMSTATE_STRUCT(kbd_port.parent_obj, LASIPS2State, 1,
vmstate_lasips2_port, LASIPS2Port),
VMSTATE_STRUCT(mouse_port.parent_obj, LASIPS2State, 1,
vmstate_lasips2_port, LASIPS2Port),
VMSTATE_END_OF_LIST()
}
};
typedef enum {
REG_PS2_ID = 0,
REG_PS2_RCVDATA = 4,
REG_PS2_CONTROL = 8,
REG_PS2_STATUS = 12,
} lasips2_read_reg_t;
typedef enum {
REG_PS2_RESET = 0,
REG_PS2_XMTDATA = 4,
} lasips2_write_reg_t;
typedef enum {
LASIPS2_CONTROL_ENABLE = 0x01,
LASIPS2_CONTROL_LOOPBACK = 0x02,
LASIPS2_CONTROL_DIAG = 0x20,
LASIPS2_CONTROL_DATDIR = 0x40,
LASIPS2_CONTROL_CLKDIR = 0x80,
} lasips2_control_reg_t;
typedef enum {
LASIPS2_STATUS_RBNE = 0x01,
LASIPS2_STATUS_TBNE = 0x02,
LASIPS2_STATUS_TERR = 0x04,
LASIPS2_STATUS_PERR = 0x08,
LASIPS2_STATUS_CMPINTR = 0x10,
LASIPS2_STATUS_DATSHD = 0x40,
LASIPS2_STATUS_CLKSHD = 0x80,
} lasips2_status_reg_t;
static const char *lasips2_read_reg_name(uint64_t addr)
{
switch (addr & 0xc) {
case REG_PS2_ID:
return " PS2_ID";
case REG_PS2_RCVDATA:
return " PS2_RCVDATA";
case REG_PS2_CONTROL:
return " PS2_CONTROL";
case REG_PS2_STATUS:
return " PS2_STATUS";
default:
return "";
}
}
static const char *lasips2_write_reg_name(uint64_t addr)
{
switch (addr & 0x0c) {
case REG_PS2_RESET:
return " PS2_RESET";
case REG_PS2_XMTDATA:
return " PS2_XMTDATA";
case REG_PS2_CONTROL:
return " PS2_CONTROL";
default:
return "";
}
}
static void lasips2_update_irq(LASIPS2State *s)
{
int level = s->int_status ? 1 : 0;
trace_lasips2_intr(level);
qemu_set_irq(s->irq, level);
}
static void lasips2_set_irq(void *opaque, int n, int level)
{
LASIPS2State *s = LASIPS2(opaque);
if (level) {
s->int_status |= BIT(n);
} else {
s->int_status &= ~BIT(n);
}
lasips2_update_irq(s);
}
static void lasips2_reg_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
LASIPS2Port *lp = LASIPS2_PORT(opaque);
trace_lasips2_reg_write(size, lp->id, addr,
lasips2_write_reg_name(addr), val);
switch (addr & 0xc) {
case REG_PS2_CONTROL:
lp->control = val;
break;
case REG_PS2_XMTDATA:
if (lp->control & LASIPS2_CONTROL_LOOPBACK) {
lp->buf = val;
lp->loopback_rbne = true;
qemu_set_irq(lp->irq, 1);
break;
}
if (lp->id) {
ps2_write_mouse(PS2_MOUSE_DEVICE(lp->ps2dev), val);
} else {
ps2_write_keyboard(PS2_KBD_DEVICE(lp->ps2dev), val);
}
break;
case REG_PS2_RESET:
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unknown register 0x%02" HWADDR_PRIx "\n",
__func__, addr);
break;
}
}
static uint64_t lasips2_reg_read(void *opaque, hwaddr addr, unsigned size)
{
LASIPS2Port *lp = LASIPS2_PORT(opaque);
uint64_t ret = 0;
switch (addr & 0xc) {
case REG_PS2_ID:
ret = lp->id;
break;
case REG_PS2_RCVDATA:
if (lp->control & LASIPS2_CONTROL_LOOPBACK) {
lp->loopback_rbne = false;
qemu_set_irq(lp->irq, 0);
ret = lp->buf;
break;
}
ret = ps2_read_data(lp->ps2dev);
break;
case REG_PS2_CONTROL:
ret = lp->control;
break;
case REG_PS2_STATUS:
ret = LASIPS2_STATUS_DATSHD | LASIPS2_STATUS_CLKSHD;
if (lp->control & LASIPS2_CONTROL_DIAG) {
if (!(lp->control & LASIPS2_CONTROL_DATDIR)) {
ret &= ~LASIPS2_STATUS_DATSHD;
}
if (!(lp->control & LASIPS2_CONTROL_CLKDIR)) {
ret &= ~LASIPS2_STATUS_CLKSHD;
}
}
if (lp->control & LASIPS2_CONTROL_LOOPBACK) {
if (lp->loopback_rbne) {
ret |= LASIPS2_STATUS_RBNE;
}
} else {
if (!ps2_queue_empty(lp->ps2dev)) {
ret |= LASIPS2_STATUS_RBNE;
}
}
if (lp->lasips2->int_status) {
ret |= LASIPS2_STATUS_CMPINTR;
}
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unknown register 0x%02" HWADDR_PRIx "\n",
__func__, addr);
break;
}
trace_lasips2_reg_read(size, lp->id, addr,
lasips2_read_reg_name(addr), ret);
return ret;
}
static const MemoryRegionOps lasips2_reg_ops = {
.read = lasips2_reg_read,
.write = lasips2_reg_write,
.impl = {
.min_access_size = 1,
.max_access_size = 4,
},
.endianness = DEVICE_BIG_ENDIAN,
};
static void lasips2_realize(DeviceState *dev, Error **errp)
{
LASIPS2State *s = LASIPS2(dev);
LASIPS2Port *lp;
lp = LASIPS2_PORT(&s->kbd_port);
if (!(qdev_realize(DEVICE(lp), NULL, errp))) {
return;
}
qdev_connect_gpio_out(DEVICE(lp), 0,
qdev_get_gpio_in_named(dev, "lasips2-port-input-irq",
lp->id));
lp = LASIPS2_PORT(&s->mouse_port);
if (!(qdev_realize(DEVICE(lp), NULL, errp))) {
return;
}
qdev_connect_gpio_out(DEVICE(lp), 0,
qdev_get_gpio_in_named(dev, "lasips2-port-input-irq",
lp->id));
}
static void lasips2_init(Object *obj)
{
LASIPS2State *s = LASIPS2(obj);
LASIPS2Port *lp;
object_initialize_child(obj, "lasips2-kbd-port", &s->kbd_port,
TYPE_LASIPS2_KBD_PORT);
object_initialize_child(obj, "lasips2-mouse-port", &s->mouse_port,
TYPE_LASIPS2_MOUSE_PORT);
lp = LASIPS2_PORT(&s->kbd_port);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &lp->reg);
lp = LASIPS2_PORT(&s->mouse_port);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &lp->reg);
sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
qdev_init_gpio_in_named(DEVICE(obj), lasips2_set_irq,
"lasips2-port-input-irq", 2);
}
static void lasips2_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = lasips2_realize;
dc->vmsd = &vmstate_lasips2;
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo lasips2_info = {
.name = TYPE_LASIPS2,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_init = lasips2_init,
.instance_size = sizeof(LASIPS2State),
.class_init = lasips2_class_init,
};
static void lasips2_port_set_irq(void *opaque, int n, int level)
{
LASIPS2Port *s = LASIPS2_PORT(opaque);
qemu_set_irq(s->irq, level);
}
static void lasips2_port_realize(DeviceState *dev, Error **errp)
{
LASIPS2Port *s = LASIPS2_PORT(dev);
qdev_connect_gpio_out(DEVICE(s->ps2dev), PS2_DEVICE_IRQ,
qdev_get_gpio_in_named(dev, "ps2-input-irq", 0));
}
static void lasips2_port_init(Object *obj)
{
LASIPS2Port *s = LASIPS2_PORT(obj);
qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
qdev_init_gpio_in_named(DEVICE(obj), lasips2_port_set_irq,
"ps2-input-irq", 1);
}
static void lasips2_port_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = lasips2_port_realize;
}
static const TypeInfo lasips2_port_info = {
.name = TYPE_LASIPS2_PORT,
.parent = TYPE_DEVICE,
.instance_init = lasips2_port_init,
.instance_size = sizeof(LASIPS2Port),
.class_init = lasips2_port_class_init,
.class_size = sizeof(LASIPS2PortDeviceClass),
.abstract = true,
};
static void lasips2_kbd_port_realize(DeviceState *dev, Error **errp)
{
LASIPS2KbdPort *s = LASIPS2_KBD_PORT(dev);
LASIPS2Port *lp = LASIPS2_PORT(dev);
LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_GET_CLASS(lp);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->kbd), errp)) {
return;
}
lp->ps2dev = PS2_DEVICE(&s->kbd);
lpdc->parent_realize(dev, errp);
}
static void lasips2_kbd_port_init(Object *obj)
{
LASIPS2KbdPort *s = LASIPS2_KBD_PORT(obj);
LASIPS2Port *lp = LASIPS2_PORT(obj);
memory_region_init_io(&lp->reg, obj, &lasips2_reg_ops, lp, "lasips2-kbd",
0x100);
object_initialize_child(obj, "kbd", &s->kbd, TYPE_PS2_KBD_DEVICE);
lp->id = 0;
lp->lasips2 = container_of(s, LASIPS2State, kbd_port);
}
static void lasips2_kbd_port_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_CLASS(klass);
device_class_set_parent_realize(dc, lasips2_kbd_port_realize,
&lpdc->parent_realize);
}
static const TypeInfo lasips2_kbd_port_info = {
.name = TYPE_LASIPS2_KBD_PORT,
.parent = TYPE_LASIPS2_PORT,
.instance_size = sizeof(LASIPS2KbdPort),
.instance_init = lasips2_kbd_port_init,
.class_init = lasips2_kbd_port_class_init,
};
static void lasips2_mouse_port_realize(DeviceState *dev, Error **errp)
{
LASIPS2MousePort *s = LASIPS2_MOUSE_PORT(dev);
LASIPS2Port *lp = LASIPS2_PORT(dev);
LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_GET_CLASS(lp);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->mouse), errp)) {
return;
}
lp->ps2dev = PS2_DEVICE(&s->mouse);
lpdc->parent_realize(dev, errp);
}
static void lasips2_mouse_port_init(Object *obj)
{
LASIPS2MousePort *s = LASIPS2_MOUSE_PORT(obj);
LASIPS2Port *lp = LASIPS2_PORT(obj);
memory_region_init_io(&lp->reg, obj, &lasips2_reg_ops, lp, "lasips2-mouse",
0x100);
object_initialize_child(obj, "mouse", &s->mouse, TYPE_PS2_MOUSE_DEVICE);
lp->id = 1;
lp->lasips2 = container_of(s, LASIPS2State, mouse_port);
}
static void lasips2_mouse_port_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
LASIPS2PortDeviceClass *lpdc = LASIPS2_PORT_CLASS(klass);
device_class_set_parent_realize(dc, lasips2_mouse_port_realize,
&lpdc->parent_realize);
}
static const TypeInfo lasips2_mouse_port_info = {
.name = TYPE_LASIPS2_MOUSE_PORT,
.parent = TYPE_LASIPS2_PORT,
.instance_size = sizeof(LASIPS2MousePort),
.instance_init = lasips2_mouse_port_init,
.class_init = lasips2_mouse_port_class_init,
};
static void lasips2_register_types(void)
{
type_register_static(&lasips2_info);
type_register_static(&lasips2_port_info);
type_register_static(&lasips2_kbd_port_info);
type_register_static(&lasips2_mouse_port_info);
}
type_init(lasips2_register_types)
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