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acrn-hypervisor/devicemodel/hw/platform/ps2kbd.c

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/*-
* Copyright (c) 2015 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
* Copyright (c) 2015 Nahanni Systems Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <pthread.h>
#include "types.h"
#include "atkbdc.h"
#include "console.h"
#include "log.h"
/* keyboard device commands */
#define PS2KC_RESET_DEV 0xff
#define PS2KC_DISABLE 0xf5
#define PS2KC_ENABLE 0xf4
#define PS2KC_SET_TYPEMATIC 0xf3
#define PS2KC_SEND_DEV_ID 0xf2
#define PS2KC_SET_SCANCODE_SET 0xf0
#define PS2KC_ECHO 0xee
#define PS2KC_SET_LEDS 0xed
#define PS2KC_BAT_SUCCESS 0xaa
#define PS2KC_ACK 0xfa
#define PS2KBD_FIFOSZ 16
struct fifo {
uint8_t buf[PS2KBD_FIFOSZ];
int rindex; /* index to read from */
int windex; /* index to write to */
int num; /* number of bytes in the fifo */
int size; /* size of the fifo */
};
struct ps2kbd_info {
struct atkbdc_base *base;
pthread_mutex_t mtx;
bool enabled;
struct fifo fifo;
uint8_t curcmd; /* current command for next byte */
};
static void
fifo_init(struct ps2kbd_info *kbd)
{
struct fifo *fifo;
fifo = &kbd->fifo;
fifo->size = sizeof(((struct fifo *)0)->buf);
}
static void
fifo_reset(struct ps2kbd_info *kbd)
{
struct fifo *fifo;
fifo = &kbd->fifo;
bzero(fifo, sizeof(struct fifo));
fifo->size = sizeof(((struct fifo *)0)->buf);
}
static void
fifo_put(struct ps2kbd_info *kbd, uint8_t val)
{
struct fifo *fifo;
fifo = &kbd->fifo;
if (fifo->num < fifo->size) {
fifo->buf[fifo->windex] = val;
fifo->windex = (fifo->windex + 1) % fifo->size;
fifo->num++;
}
}
static int
fifo_get(struct ps2kbd_info *kbd, uint8_t *val)
{
struct fifo *fifo;
fifo = &kbd->fifo;
if (fifo->num > 0) {
*val = fifo->buf[fifo->rindex];
fifo->rindex = (fifo->rindex + 1) % fifo->size;
fifo->num--;
return 0;
}
return -1;
}
int
ps2kbd_read(struct ps2kbd_info *kbd, uint8_t *val)
{
int retval;
pthread_mutex_lock(&kbd->mtx);
retval = fifo_get(kbd, val);
pthread_mutex_unlock(&kbd->mtx);
return retval;
}
void
ps2kbd_write(struct ps2kbd_info *kbd, uint8_t val)
{
pthread_mutex_lock(&kbd->mtx);
if (kbd->curcmd) {
switch (kbd->curcmd) {
case PS2KC_SET_TYPEMATIC:
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_SET_SCANCODE_SET:
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_SET_LEDS:
fifo_put(kbd, PS2KC_ACK);
break;
default:
pr_err("Unhandled ps2 keyboard current "
"command byte 0x%02x\n", val);
break;
}
kbd->curcmd = 0;
} else {
switch (val) {
case 0x00:
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_RESET_DEV:
fifo_reset(kbd);
fifo_put(kbd, PS2KC_ACK);
fifo_put(kbd, PS2KC_BAT_SUCCESS);
break;
case PS2KC_DISABLE:
kbd->enabled = false;
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_ENABLE:
kbd->enabled = true;
fifo_reset(kbd);
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_SET_TYPEMATIC:
kbd->curcmd = val;
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_SEND_DEV_ID:
fifo_put(kbd, PS2KC_ACK);
fifo_put(kbd, 0xab);
fifo_put(kbd, 0x83);
break;
case PS2KC_SET_SCANCODE_SET:
kbd->curcmd = val;
fifo_put(kbd, PS2KC_ACK);
break;
case PS2KC_ECHO:
fifo_put(kbd, PS2KC_ECHO);
break;
case PS2KC_SET_LEDS:
kbd->curcmd = val;
fifo_put(kbd, PS2KC_ACK);
break;
default:
pr_err("Unhandled ps2 keyboard command "
"0x%02x\n", val);
break;
}
}
pthread_mutex_unlock(&kbd->mtx);
}
/*
* Translate keysym to type 2 scancode and insert into keyboard buffer.
*/
static void
ps2kbd_keysym_queue(struct ps2kbd_info *kbd,
int down, uint32_t keysym)
{
/* ASCII to type 2 scancode lookup table */
const uint8_t translation[128] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x29, 0x16, 0x52, 0x26, 0x25, 0x2e, 0x3d, 0x52,
0x46, 0x45, 0x3e, 0x55, 0x41, 0x4e, 0x49, 0x4a,
0x45, 0x16, 0x1e, 0x26, 0x25, 0x2e, 0x36, 0x3d,
0x3e, 0x46, 0x4c, 0x4c, 0x41, 0x55, 0x49, 0x4a,
0x1e, 0x1c, 0x32, 0x21, 0x23, 0x24, 0x2b, 0x34,
0x33, 0x43, 0x3b, 0x42, 0x4b, 0x3a, 0x31, 0x44,
0x4d, 0x15, 0x2d, 0x1b, 0x2c, 0x3c, 0x2a, 0x1d,
0x22, 0x35, 0x1a, 0x54, 0x5d, 0x5b, 0x36, 0x4e,
0x0e, 0x1c, 0x32, 0x21, 0x23, 0x24, 0x2b, 0x34,
0x33, 0x43, 0x3b, 0x42, 0x4b, 0x3a, 0x31, 0x44,
0x4d, 0x15, 0x2d, 0x1b, 0x2c, 0x3c, 0x2a, 0x1d,
0x22, 0x35, 0x1a, 0x54, 0x5d, 0x5b, 0x0e, 0x00,
};
switch (keysym) {
case 0x0 ... 0x7f:
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, translation[keysym]);
break;
case 0xff08: /* Back space */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x66);
break;
case 0xff09: /* Tab */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x0d);
break;
case 0xff0d: /* Return */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x5a);
break;
case 0xff1b: /* Escape */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x76);
break;
case 0xff50: /* Home */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x6c);
break;
case 0xff51: /* Left arrow */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x6b);
break;
case 0xff52: /* Up arrow */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x75);
break;
case 0xff53: /* Right arrow */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x74);
break;
case 0xff54: /* Down arrow */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x72);
break;
case 0xff55: /* PgUp */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x7d);
break;
case 0xff56: /* PgDwn */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x7a);
break;
case 0xff57: /* End */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x69);
break;
case 0xff63: /* Ins */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x70);
break;
case 0xff8d: /* Keypad Enter */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x5a);
break;
case 0xffe1: /* Left shift */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x12);
break;
case 0xffe2: /* Right shift */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x59);
break;
case 0xffe3: /* Left control */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x14);
break;
case 0xffe4: /* Right control */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x14);
break;
case 0xffe7: /* Left meta */
/* XXX */
break;
case 0xffe8: /* Right meta */
/* XXX */
break;
case 0xffe9: /* Left alt */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x11);
break;
case 0xfe03: /* AltGr */
case 0xffea: /* Right alt */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x11);
break;
case 0xffeb: /* Left Windows */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x1f);
break;
case 0xffec: /* Right Windows */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x27);
break;
case 0xffbe: /* F1 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x05);
break;
case 0xffbf: /* F2 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x06);
break;
case 0xffc0: /* F3 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x04);
break;
case 0xffc1: /* F4 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x0C);
break;
case 0xffc2: /* F5 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x03);
break;
case 0xffc3: /* F6 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x0B);
break;
case 0xffc4: /* F7 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x83);
break;
case 0xffc5: /* F8 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x0A);
break;
case 0xffc6: /* F9 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x01);
break;
case 0xffc7: /* F10 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x09);
break;
case 0xffc8: /* F11 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x78);
break;
case 0xffc9: /* F12 */
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x07);
break;
case 0xffff: /* Del */
fifo_put(kbd, 0xe0);
if (!down)
fifo_put(kbd, 0xf0);
fifo_put(kbd, 0x71);
break;
default:
pr_err("Unhandled ps2 keyboard keysym 0x%x\n",
keysym);
break;
}
}
static void
ps2kbd_event(int down, uint32_t keysym, void *arg)
{
struct ps2kbd_info *kbd = arg;
int fifo_full;
pthread_mutex_lock(&kbd->mtx);
if (!kbd->enabled) {
pthread_mutex_unlock(&kbd->mtx);
return;
}
fifo_full = kbd->fifo.num == PS2KBD_FIFOSZ;
ps2kbd_keysym_queue(kbd, down, keysym);
pthread_mutex_unlock(&kbd->mtx);
if (!fifo_full)
atkbdc_event(kbd->base, 1);
}
struct ps2kbd_info *
ps2kbd_init(struct atkbdc_base *base)
{
struct ps2kbd_info *kbd;
kbd = calloc(1, sizeof(struct ps2kbd_info));
if (!kbd) {
pr_err("%s: alloc memory fail!\n", __func__);
return NULL;
}
pthread_mutex_init(&kbd->mtx, NULL);
fifo_init(kbd);
kbd->base = base;
console_kbd_register(ps2kbd_event, kbd, 1);
return kbd;
}
void
ps2kbd_deinit(struct atkbdc_base *base)
{
console_kbd_unregister();
free(base->ps2kbd);
base->ps2kbd = NULL;
}
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