qemu-e2k/hw/m68k/next-kbd.c

290 lines
7.7 KiB
C

/*
* QEMU NeXT Keyboard/Mouse emulation
*
* Copyright (c) 2011 Bryce Lanham
*
* 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.
*/
/*
* This is admittedly hackish, but works well enough for basic input. Mouse
* support will be added once we can boot something that needs the mouse.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "hw/sysbus.h"
#include "hw/m68k/next-cube.h"
#include "ui/console.h"
#include "migration/vmstate.h"
#include "qom/object.h"
OBJECT_DECLARE_SIMPLE_TYPE(NextKBDState, NEXTKBD)
/* following defintions from next68k netbsd */
#define CSR_INT 0x00800000
#define CSR_DATA 0x00400000
#define KD_KEYMASK 0x007f
#define KD_DIRECTION 0x0080 /* pressed or released */
#define KD_CNTL 0x0100
#define KD_LSHIFT 0x0200
#define KD_RSHIFT 0x0400
#define KD_LCOMM 0x0800
#define KD_RCOMM 0x1000
#define KD_LALT 0x2000
#define KD_RALT 0x4000
#define KD_VALID 0x8000 /* only set for scancode keys ? */
#define KD_MODS 0x4f00
#define KBD_QUEUE_SIZE 256
typedef struct {
uint8_t data[KBD_QUEUE_SIZE];
int rptr, wptr, count;
} KBDQueue;
struct NextKBDState {
SysBusDevice sbd;
MemoryRegion mr;
KBDQueue queue;
uint16_t shift;
};
static void queue_code(void *opaque, int code);
/* lots of magic numbers here */
static uint32_t kbd_read_byte(void *opaque, hwaddr addr)
{
switch (addr & 0x3) {
case 0x0: /* 0xe000 */
return 0x80 | 0x20;
case 0x1: /* 0xe001 */
return 0x80 | 0x40 | 0x20 | 0x10;
case 0x2: /* 0xe002 */
/* returning 0x40 caused mach to hang */
return 0x10 | 0x2 | 0x1;
default:
qemu_log_mask(LOG_UNIMP, "NeXT kbd read byte %"HWADDR_PRIx"\n", addr);
}
return 0;
}
static uint32_t kbd_read_word(void *opaque, hwaddr addr)
{
qemu_log_mask(LOG_UNIMP, "NeXT kbd read word %"HWADDR_PRIx"\n", addr);
return 0;
}
/* even more magic numbers */
static uint32_t kbd_read_long(void *opaque, hwaddr addr)
{
int key = 0;
NextKBDState *s = NEXTKBD(opaque);
KBDQueue *q = &s->queue;
switch (addr & 0xf) {
case 0x0: /* 0xe000 */
return 0xA0F09300;
case 0x8: /* 0xe008 */
/* get keycode from buffer */
if (q->count > 0) {
key = q->data[q->rptr];
if (++q->rptr == KBD_QUEUE_SIZE) {
q->rptr = 0;
}
q->count--;
if (s->shift) {
key |= s->shift;
}
if (key & 0x80) {
return 0;
} else {
return 0x10000000 | KD_VALID | key;
}
} else {
return 0;
}
default:
qemu_log_mask(LOG_UNIMP, "NeXT kbd read long %"HWADDR_PRIx"\n", addr);
return 0;
}
}
static uint64_t kbd_readfn(void *opaque, hwaddr addr, unsigned size)
{
switch (size) {
case 1:
return kbd_read_byte(opaque, addr);
case 2:
return kbd_read_word(opaque, addr);
case 4:
return kbd_read_long(opaque, addr);
default:
g_assert_not_reached();
}
}
static void kbd_writefn(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
qemu_log_mask(LOG_UNIMP, "NeXT kbd write: size=%u addr=0x%"HWADDR_PRIx
"val=0x%"PRIx64"\n", size, addr, value);
}
static const MemoryRegionOps kbd_ops = {
.read = kbd_readfn,
.write = kbd_writefn,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void nextkbd_event(void *opaque, int ch)
{
/*
* Will want to set vars for caps/num lock
* if (ch & 0x80) -> key release
* there's also e0 escaped scancodes that might need to be handled
*/
queue_code(opaque, ch);
}
static const unsigned char next_keycodes[128] = {
0x00, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x50, 0x4F,
0x4E, 0x1E, 0x1F, 0x20, 0x1D, 0x1C, 0x1B, 0x00,
0x42, 0x43, 0x44, 0x45, 0x48, 0x47, 0x46, 0x06,
0x07, 0x08, 0x00, 0x00, 0x2A, 0x00, 0x39, 0x3A,
0x3B, 0x3C, 0x3D, 0x40, 0x3F, 0x3E, 0x2D, 0x2C,
0x2B, 0x26, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34,
0x35, 0x37, 0x36, 0x2e, 0x2f, 0x30, 0x00, 0x00,
0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static void queue_code(void *opaque, int code)
{
NextKBDState *s = NEXTKBD(opaque);
KBDQueue *q = &s->queue;
int key = code & KD_KEYMASK;
int release = code & 0x80;
static int ext;
if (code == 0xE0) {
ext = 1;
}
if (code == 0x2A || code == 0x1D || code == 0x36) {
if (code == 0x2A) {
s->shift = KD_LSHIFT;
} else if (code == 0x36) {
s->shift = KD_RSHIFT;
ext = 0;
} else if (code == 0x1D && !ext) {
s->shift = KD_LCOMM;
} else if (code == 0x1D && ext) {
ext = 0;
s->shift = KD_RCOMM;
}
return;
} else if (code == (0x2A | 0x80) || code == (0x1D | 0x80) ||
code == (0x36 | 0x80)) {
s->shift = 0;
return;
}
if (q->count >= KBD_QUEUE_SIZE) {
return;
}
q->data[q->wptr] = next_keycodes[key] | release;
if (++q->wptr == KBD_QUEUE_SIZE) {
q->wptr = 0;
}
q->count++;
/*
* might need to actually trigger the NeXT irq, but as the keyboard works
* at the moment, I'll worry about it later
*/
/* s->update_irq(s->update_arg, 1); */
}
static void nextkbd_reset(DeviceState *dev)
{
NextKBDState *nks = NEXTKBD(dev);
memset(&nks->queue, 0, sizeof(KBDQueue));
nks->shift = 0;
}
static void nextkbd_realize(DeviceState *dev, Error **errp)
{
NextKBDState *s = NEXTKBD(dev);
memory_region_init_io(&s->mr, OBJECT(dev), &kbd_ops, s, "next.kbd", 0x1000);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr);
qemu_add_kbd_event_handler(nextkbd_event, s);
}
static const VMStateDescription nextkbd_vmstate = {
.name = TYPE_NEXTKBD,
.unmigratable = 1, /* TODO: Implement this when m68k CPU is migratable */
};
static void nextkbd_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
dc->vmsd = &nextkbd_vmstate;
dc->realize = nextkbd_realize;
dc->reset = nextkbd_reset;
}
static const TypeInfo nextkbd_info = {
.name = TYPE_NEXTKBD,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(NextKBDState),
.class_init = nextkbd_class_init,
};
static void nextkbd_register_types(void)
{
type_register_static(&nextkbd_info);
}
type_init(nextkbd_register_types)