342 lines
10 KiB
C
342 lines
10 KiB
C
/*
|
|
* QEMU PC keyboard emulation
|
|
*
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
*
|
|
* 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 <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
#include <assert.h>
|
|
|
|
#include "cutils.h"
|
|
#include "iomem.h"
|
|
#include "ps2.h"
|
|
#include "virtio.h"
|
|
#include "machine.h"
|
|
|
|
/* debug PC keyboard */
|
|
//#define DEBUG_KBD
|
|
|
|
/* debug PC keyboard : only mouse */
|
|
//#define DEBUG_MOUSE
|
|
|
|
/* Keyboard Controller Commands */
|
|
#define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
|
|
#define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
|
|
#define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
|
|
#define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
|
|
#define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
|
|
#define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
|
|
#define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
|
|
#define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
|
|
#define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
|
|
#define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
|
|
#define KBD_CCMD_READ_INPORT 0xC0 /* read input port */
|
|
#define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */
|
|
#define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */
|
|
#define KBD_CCMD_WRITE_OBUF 0xD2
|
|
#define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
|
|
initiated by the auxiliary device */
|
|
#define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
|
|
#define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */
|
|
#define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */
|
|
#define KBD_CCMD_RESET 0xFE
|
|
|
|
/* Status Register Bits */
|
|
#define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
|
|
#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
|
|
#define KBD_STAT_SELFTEST 0x04 /* Self test successful */
|
|
#define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
|
|
#define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
|
|
#define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
|
|
#define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
|
|
#define KBD_STAT_PERR 0x80 /* Parity error */
|
|
|
|
/* Controller Mode Register Bits */
|
|
#define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
|
|
#define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
|
|
#define KBD_MODE_SYS 0x04 /* The system flag (?) */
|
|
#define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
|
|
#define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
|
|
#define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
|
|
#define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
|
|
#define KBD_MODE_RFU 0x80
|
|
|
|
#define KBD_PENDING_KBD 1
|
|
#define KBD_PENDING_AUX 2
|
|
|
|
struct KBDState {
|
|
uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
|
|
uint8_t status;
|
|
uint8_t mode;
|
|
/* Bitmask of devices with data available. */
|
|
uint8_t pending;
|
|
PS2KbdState *kbd;
|
|
PS2MouseState *mouse;
|
|
|
|
IRQSignal *irq_kbd;
|
|
IRQSignal *irq_mouse;
|
|
};
|
|
|
|
static void qemu_system_reset_request(void)
|
|
{
|
|
printf("system_reset_request\n");
|
|
exit(1);
|
|
/* XXX */
|
|
}
|
|
|
|
static void ioport_set_a20(int val)
|
|
{
|
|
}
|
|
|
|
static int ioport_get_a20(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* update irq and KBD_STAT_[MOUSE_]OBF */
|
|
/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
|
|
incorrect, but it avoids having to simulate exact delays */
|
|
static void kbd_update_irq(KBDState *s)
|
|
{
|
|
int irq_kbd_level, irq_mouse_level;
|
|
|
|
irq_kbd_level = 0;
|
|
irq_mouse_level = 0;
|
|
s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
|
|
if (s->pending) {
|
|
s->status |= KBD_STAT_OBF;
|
|
/* kbd data takes priority over aux data. */
|
|
if (s->pending == KBD_PENDING_AUX) {
|
|
s->status |= KBD_STAT_MOUSE_OBF;
|
|
if (s->mode & KBD_MODE_MOUSE_INT)
|
|
irq_mouse_level = 1;
|
|
} else {
|
|
if ((s->mode & KBD_MODE_KBD_INT) &&
|
|
!(s->mode & KBD_MODE_DISABLE_KBD))
|
|
irq_kbd_level = 1;
|
|
}
|
|
}
|
|
set_irq(s->irq_kbd, irq_kbd_level);
|
|
set_irq(s->irq_mouse, irq_mouse_level);
|
|
}
|
|
|
|
static void kbd_update_kbd_irq(void *opaque, int level)
|
|
{
|
|
KBDState *s = (KBDState *)opaque;
|
|
|
|
if (level)
|
|
s->pending |= KBD_PENDING_KBD;
|
|
else
|
|
s->pending &= ~KBD_PENDING_KBD;
|
|
kbd_update_irq(s);
|
|
}
|
|
|
|
static void kbd_update_aux_irq(void *opaque, int level)
|
|
{
|
|
KBDState *s = (KBDState *)opaque;
|
|
|
|
if (level)
|
|
s->pending |= KBD_PENDING_AUX;
|
|
else
|
|
s->pending &= ~KBD_PENDING_AUX;
|
|
kbd_update_irq(s);
|
|
}
|
|
|
|
static uint32_t kbd_read_status(void *opaque, uint32_t addr, int size_log2)
|
|
{
|
|
KBDState *s = opaque;
|
|
int val;
|
|
val = s->status;
|
|
#if defined(DEBUG_KBD)
|
|
printf("kbd: read status=0x%02x\n", val);
|
|
#endif
|
|
return val;
|
|
}
|
|
|
|
static void kbd_queue(KBDState *s, int b, int aux)
|
|
{
|
|
if (aux)
|
|
ps2_queue(s->mouse, b);
|
|
else
|
|
ps2_queue(s->kbd, b);
|
|
}
|
|
|
|
static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val,
|
|
int size_log2)
|
|
{
|
|
KBDState *s = opaque;
|
|
|
|
#if defined(DEBUG_KBD)
|
|
printf("kbd: write cmd=0x%02x\n", val);
|
|
#endif
|
|
switch(val) {
|
|
case KBD_CCMD_READ_MODE:
|
|
kbd_queue(s, s->mode, 1);
|
|
break;
|
|
case KBD_CCMD_WRITE_MODE:
|
|
case KBD_CCMD_WRITE_OBUF:
|
|
case KBD_CCMD_WRITE_AUX_OBUF:
|
|
case KBD_CCMD_WRITE_MOUSE:
|
|
case KBD_CCMD_WRITE_OUTPORT:
|
|
s->write_cmd = val;
|
|
break;
|
|
case KBD_CCMD_MOUSE_DISABLE:
|
|
s->mode |= KBD_MODE_DISABLE_MOUSE;
|
|
break;
|
|
case KBD_CCMD_MOUSE_ENABLE:
|
|
s->mode &= ~KBD_MODE_DISABLE_MOUSE;
|
|
break;
|
|
case KBD_CCMD_TEST_MOUSE:
|
|
kbd_queue(s, 0x00, 0);
|
|
break;
|
|
case KBD_CCMD_SELF_TEST:
|
|
s->status |= KBD_STAT_SELFTEST;
|
|
kbd_queue(s, 0x55, 0);
|
|
break;
|
|
case KBD_CCMD_KBD_TEST:
|
|
kbd_queue(s, 0x00, 0);
|
|
break;
|
|
case KBD_CCMD_KBD_DISABLE:
|
|
s->mode |= KBD_MODE_DISABLE_KBD;
|
|
kbd_update_irq(s);
|
|
break;
|
|
case KBD_CCMD_KBD_ENABLE:
|
|
s->mode &= ~KBD_MODE_DISABLE_KBD;
|
|
kbd_update_irq(s);
|
|
break;
|
|
case KBD_CCMD_READ_INPORT:
|
|
kbd_queue(s, 0x00, 0);
|
|
break;
|
|
case KBD_CCMD_READ_OUTPORT:
|
|
/* XXX: check that */
|
|
val = 0x01 | (ioport_get_a20() << 1);
|
|
if (s->status & KBD_STAT_OBF)
|
|
val |= 0x10;
|
|
if (s->status & KBD_STAT_MOUSE_OBF)
|
|
val |= 0x20;
|
|
kbd_queue(s, val, 0);
|
|
break;
|
|
case KBD_CCMD_ENABLE_A20:
|
|
ioport_set_a20(1);
|
|
break;
|
|
case KBD_CCMD_DISABLE_A20:
|
|
ioport_set_a20(0);
|
|
break;
|
|
case KBD_CCMD_RESET:
|
|
qemu_system_reset_request();
|
|
break;
|
|
case 0xff:
|
|
/* ignore that - I don't know what is its use */
|
|
break;
|
|
default:
|
|
fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint32_t kbd_read_data(void *opaque, uint32_t addr, int size_log2)
|
|
{
|
|
KBDState *s = opaque;
|
|
uint32_t val;
|
|
if (s->pending == KBD_PENDING_AUX)
|
|
val = ps2_read_data(s->mouse);
|
|
else
|
|
val = ps2_read_data(s->kbd);
|
|
#ifdef DEBUG_KBD
|
|
printf("kbd: read data=0x%02x\n", val);
|
|
#endif
|
|
return val;
|
|
}
|
|
|
|
static void kbd_write_data(void *opaque, uint32_t addr, uint32_t val, int size_log2)
|
|
{
|
|
KBDState *s = opaque;
|
|
|
|
#ifdef DEBUG_KBD
|
|
printf("kbd: write data=0x%02x\n", val);
|
|
#endif
|
|
|
|
switch(s->write_cmd) {
|
|
case 0:
|
|
ps2_write_keyboard(s->kbd, val);
|
|
break;
|
|
case KBD_CCMD_WRITE_MODE:
|
|
s->mode = val;
|
|
ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0);
|
|
/* ??? */
|
|
kbd_update_irq(s);
|
|
break;
|
|
case KBD_CCMD_WRITE_OBUF:
|
|
kbd_queue(s, val, 0);
|
|
break;
|
|
case KBD_CCMD_WRITE_AUX_OBUF:
|
|
kbd_queue(s, val, 1);
|
|
break;
|
|
case KBD_CCMD_WRITE_OUTPORT:
|
|
ioport_set_a20((val >> 1) & 1);
|
|
if (!(val & 1)) {
|
|
qemu_system_reset_request();
|
|
}
|
|
break;
|
|
case KBD_CCMD_WRITE_MOUSE:
|
|
ps2_write_mouse(s->mouse, val);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
s->write_cmd = 0;
|
|
}
|
|
|
|
static void kbd_reset(void *opaque)
|
|
{
|
|
KBDState *s = opaque;
|
|
|
|
s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
|
|
s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
|
|
}
|
|
|
|
KBDState *i8042_init(PS2KbdState **pkbd,
|
|
PS2MouseState **pmouse,
|
|
PhysMemoryMap *port_map,
|
|
IRQSignal *kbd_irq, IRQSignal *mouse_irq, uint32_t io_base)
|
|
{
|
|
KBDState *s;
|
|
|
|
s = mallocz(sizeof(*s));
|
|
|
|
s->irq_kbd = kbd_irq;
|
|
s->irq_mouse = mouse_irq;
|
|
|
|
kbd_reset(s);
|
|
cpu_register_device(port_map, io_base, 1, s, kbd_read_data, kbd_write_data,
|
|
DEVIO_SIZE8);
|
|
cpu_register_device(port_map, io_base + 4, 1, s, kbd_read_status, kbd_write_command,
|
|
DEVIO_SIZE8);
|
|
|
|
s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
|
|
s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
|
|
|
|
*pkbd = s->kbd;
|
|
*pmouse = s->mouse;
|
|
return s;
|
|
}
|