291 lines
7.8 KiB
C
291 lines
7.8 KiB
C
/*
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* QEMU NeXT Keyboard/Mouse emulation
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*
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* Copyright (c) 2011 Bryce Lanham
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* This is admittedly hackish, but works well enough for basic input. Mouse
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* support will be added once we can boot something that needs the mouse.
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "exec/address-spaces.h"
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#include "hw/hw.h"
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#include "hw/sysbus.h"
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#include "hw/m68k/next-cube.h"
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#include "ui/console.h"
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#include "sysemu/sysemu.h"
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#include "migration/vmstate.h"
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#define NEXTKBD(obj) OBJECT_CHECK(NextKBDState, (obj), TYPE_NEXTKBD)
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/* following defintions from next68k netbsd */
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#define CSR_INT 0x00800000
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#define CSR_DATA 0x00400000
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#define KD_KEYMASK 0x007f
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#define KD_DIRECTION 0x0080 /* pressed or released */
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#define KD_CNTL 0x0100
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#define KD_LSHIFT 0x0200
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#define KD_RSHIFT 0x0400
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#define KD_LCOMM 0x0800
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#define KD_RCOMM 0x1000
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#define KD_LALT 0x2000
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#define KD_RALT 0x4000
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#define KD_VALID 0x8000 /* only set for scancode keys ? */
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#define KD_MODS 0x4f00
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#define KBD_QUEUE_SIZE 256
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typedef struct {
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uint8_t data[KBD_QUEUE_SIZE];
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int rptr, wptr, count;
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} KBDQueue;
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typedef struct NextKBDState {
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SysBusDevice sbd;
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MemoryRegion mr;
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KBDQueue queue;
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uint16_t shift;
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} NextKBDState;
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static void queue_code(void *opaque, int code);
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/* lots of magic numbers here */
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static uint32_t kbd_read_byte(void *opaque, hwaddr addr)
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{
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switch (addr & 0x3) {
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case 0x0: /* 0xe000 */
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return 0x80 | 0x20;
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case 0x1: /* 0xe001 */
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return 0x80 | 0x40 | 0x20 | 0x10;
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case 0x2: /* 0xe002 */
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/* returning 0x40 caused mach to hang */
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return 0x10 | 0x2 | 0x1;
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default:
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qemu_log_mask(LOG_UNIMP, "NeXT kbd read byte %"HWADDR_PRIx"\n", addr);
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}
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return 0;
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}
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static uint32_t kbd_read_word(void *opaque, hwaddr addr)
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{
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qemu_log_mask(LOG_UNIMP, "NeXT kbd read word %"HWADDR_PRIx"\n", addr);
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return 0;
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}
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/* even more magic numbers */
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static uint32_t kbd_read_long(void *opaque, hwaddr addr)
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{
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int key = 0;
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NextKBDState *s = NEXTKBD(opaque);
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KBDQueue *q = &s->queue;
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switch (addr & 0xf) {
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case 0x0: /* 0xe000 */
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return 0xA0F09300;
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case 0x8: /* 0xe008 */
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/* get keycode from buffer */
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if (q->count > 0) {
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key = q->data[q->rptr];
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if (++q->rptr == KBD_QUEUE_SIZE) {
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q->rptr = 0;
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}
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q->count--;
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if (s->shift) {
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key |= s->shift;
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}
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if (key & 0x80) {
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return 0;
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} else {
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return 0x10000000 | KD_VALID | key;
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}
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} else {
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return 0;
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}
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default:
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qemu_log_mask(LOG_UNIMP, "NeXT kbd read long %"HWADDR_PRIx"\n", addr);
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return 0;
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}
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}
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static uint64_t kbd_readfn(void *opaque, hwaddr addr, unsigned size)
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{
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switch (size) {
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case 1:
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return kbd_read_byte(opaque, addr);
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case 2:
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return kbd_read_word(opaque, addr);
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case 4:
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return kbd_read_long(opaque, addr);
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default:
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g_assert_not_reached();
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}
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}
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static void kbd_writefn(void *opaque, hwaddr addr, uint64_t value,
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unsigned size)
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{
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qemu_log_mask(LOG_UNIMP, "NeXT kbd write: size=%u addr=0x%"HWADDR_PRIx
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"val=0x%"PRIx64"\n", size, addr, value);
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}
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static const MemoryRegionOps kbd_ops = {
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.read = kbd_readfn,
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.write = kbd_writefn,
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.valid.min_access_size = 1,
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.valid.max_access_size = 4,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static void nextkbd_event(void *opaque, int ch)
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{
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/*
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* Will want to set vars for caps/num lock
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* if (ch & 0x80) -> key release
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* there's also e0 escaped scancodes that might need to be handled
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*/
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queue_code(opaque, ch);
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}
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static const unsigned char next_keycodes[128] = {
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0x00, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x50, 0x4F,
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0x4E, 0x1E, 0x1F, 0x20, 0x1D, 0x1C, 0x1B, 0x00,
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0x42, 0x43, 0x44, 0x45, 0x48, 0x47, 0x46, 0x06,
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0x07, 0x08, 0x00, 0x00, 0x2A, 0x00, 0x39, 0x3A,
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0x3B, 0x3C, 0x3D, 0x40, 0x3F, 0x3E, 0x2D, 0x2C,
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0x2B, 0x26, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34,
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0x35, 0x37, 0x36, 0x2e, 0x2f, 0x30, 0x00, 0x00,
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0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static void queue_code(void *opaque, int code)
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{
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NextKBDState *s = NEXTKBD(opaque);
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KBDQueue *q = &s->queue;
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int key = code & KD_KEYMASK;
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int release = code & 0x80;
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static int ext;
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if (code == 0xE0) {
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ext = 1;
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}
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if (code == 0x2A || code == 0x1D || code == 0x36) {
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if (code == 0x2A) {
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s->shift = KD_LSHIFT;
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} else if (code == 0x36) {
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s->shift = KD_RSHIFT;
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ext = 0;
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} else if (code == 0x1D && !ext) {
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s->shift = KD_LCOMM;
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} else if (code == 0x1D && ext) {
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ext = 0;
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s->shift = KD_RCOMM;
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}
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return;
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} else if (code == (0x2A | 0x80) || code == (0x1D | 0x80) ||
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code == (0x36 | 0x80)) {
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s->shift = 0;
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return;
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}
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if (q->count >= KBD_QUEUE_SIZE) {
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return;
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}
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q->data[q->wptr] = next_keycodes[key] | release;
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if (++q->wptr == KBD_QUEUE_SIZE) {
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q->wptr = 0;
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}
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q->count++;
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/*
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* might need to actually trigger the NeXT irq, but as the keyboard works
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* at the moment, I'll worry about it later
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*/
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/* s->update_irq(s->update_arg, 1); */
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}
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static void nextkbd_reset(DeviceState *dev)
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{
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NextKBDState *nks = NEXTKBD(dev);
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memset(&nks->queue, 0, sizeof(KBDQueue));
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nks->shift = 0;
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}
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static void nextkbd_realize(DeviceState *dev, Error **errp)
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{
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NextKBDState *s = NEXTKBD(dev);
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memory_region_init_io(&s->mr, OBJECT(dev), &kbd_ops, s, "next.kbd", 0x1000);
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sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr);
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qemu_add_kbd_event_handler(nextkbd_event, s);
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}
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static const VMStateDescription nextkbd_vmstate = {
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.name = TYPE_NEXTKBD,
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.unmigratable = 1, /* TODO: Implement this when m68k CPU is migratable */
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};
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static void nextkbd_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
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dc->vmsd = &nextkbd_vmstate;
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dc->realize = nextkbd_realize;
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dc->reset = nextkbd_reset;
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}
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static const TypeInfo nextkbd_info = {
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.name = TYPE_NEXTKBD,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(NextKBDState),
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.class_init = nextkbd_class_init,
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};
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static void nextkbd_register_types(void)
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{
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type_register_static(&nextkbd_info);
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}
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type_init(nextkbd_register_types)
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