mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-11 13:43:27 +08:00
463 lines
8.8 KiB
C
463 lines
8.8 KiB
C
/***********************************************************************
|
|
*
|
|
* (C) Copyright 2004
|
|
* DENX Software Engineering
|
|
* Wolfgang Denk, wd@denx.de
|
|
* All rights reserved.
|
|
*
|
|
* PS/2 multiplexer driver
|
|
*
|
|
* Originally from linux source (drivers/char/ps2mult.c)
|
|
*
|
|
* Uses simple serial driver (ps2ser.c) to access the multiplexer
|
|
* Used by PS/2 keyboard driver (pc_keyb.c)
|
|
*
|
|
***********************************************************************/
|
|
|
|
#include <common.h>
|
|
|
|
#include <pc_keyb.h>
|
|
#include <asm/atomic.h>
|
|
#include <ps2mult.h>
|
|
|
|
/* #define DEBUG_MULT */
|
|
/* #define DEBUG_KEYB */
|
|
|
|
#define KBD_STAT_DEFAULT (KBD_STAT_SELFTEST | KBD_STAT_UNLOCKED)
|
|
|
|
#define PRINTF(format, args...) printf("ps2mult.c: " format, ## args)
|
|
|
|
#ifdef DEBUG_MULT
|
|
#define PRINTF_MULT(format, args...) printf("PS2MULT: " format, ## args)
|
|
#else
|
|
#define PRINTF_MULT(format, args...)
|
|
#endif
|
|
|
|
#ifdef DEBUG_KEYB
|
|
#define PRINTF_KEYB(format, args...) printf("KEYB: " format, ## args)
|
|
#else
|
|
#define PRINTF_KEYB(format, args...)
|
|
#endif
|
|
|
|
|
|
static ulong start_time;
|
|
static int init_done = 0;
|
|
|
|
static int received_escape = 0;
|
|
static int received_bsync = 0;
|
|
static int received_selector = 0;
|
|
|
|
static int kbd_command_active = 0;
|
|
static int mouse_command_active = 0;
|
|
static int ctl_command_active = 0;
|
|
|
|
static u_char command_byte = 0;
|
|
|
|
static void (*keyb_handler)(void *dev_id);
|
|
|
|
static u_char ps2mult_buf [PS2BUF_SIZE];
|
|
static atomic_t ps2mult_buf_cnt;
|
|
static int ps2mult_buf_in_idx;
|
|
static int ps2mult_buf_out_idx;
|
|
|
|
static u_char ps2mult_buf_status [PS2BUF_SIZE];
|
|
|
|
#ifndef CONFIG_BOARD_EARLY_INIT_R
|
|
#error #define CONFIG_BOARD_EARLY_INIT_R and call ps2mult_early_init() in board_early_init_r()
|
|
#endif
|
|
void ps2mult_early_init (void)
|
|
{
|
|
start_time = get_timer(0);
|
|
}
|
|
|
|
static void ps2mult_send_byte(u_char byte, u_char sel)
|
|
{
|
|
ps2ser_putc(sel);
|
|
|
|
if (sel == PS2MULT_KB_SELECTOR) {
|
|
PRINTF_MULT("0x%02x send KEYBOARD\n", byte);
|
|
kbd_command_active = 1;
|
|
} else {
|
|
PRINTF_MULT("0x%02x send MOUSE\n", byte);
|
|
mouse_command_active = 1;
|
|
}
|
|
|
|
switch (byte) {
|
|
case PS2MULT_ESCAPE:
|
|
case PS2MULT_BSYNC:
|
|
case PS2MULT_KB_SELECTOR:
|
|
case PS2MULT_MS_SELECTOR:
|
|
case PS2MULT_SESSION_START:
|
|
case PS2MULT_SESSION_END:
|
|
ps2ser_putc(PS2MULT_ESCAPE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ps2ser_putc(byte);
|
|
}
|
|
|
|
static void ps2mult_receive_byte(u_char byte, u_char sel)
|
|
{
|
|
u_char status = KBD_STAT_DEFAULT;
|
|
|
|
#if 1 /* Ignore mouse in U-Boot */
|
|
if (sel == PS2MULT_MS_SELECTOR) return;
|
|
#endif
|
|
|
|
if (sel == PS2MULT_KB_SELECTOR) {
|
|
if (kbd_command_active) {
|
|
if (!received_bsync) {
|
|
PRINTF_MULT("0x%02x lost KEYBOARD !!!\n", byte);
|
|
return;
|
|
} else {
|
|
kbd_command_active = 0;
|
|
received_bsync = 0;
|
|
}
|
|
}
|
|
PRINTF_MULT("0x%02x receive KEYBOARD\n", byte);
|
|
status |= KBD_STAT_IBF | KBD_STAT_OBF;
|
|
} else {
|
|
if (mouse_command_active) {
|
|
if (!received_bsync) {
|
|
PRINTF_MULT("0x%02x lost MOUSE !!!\n", byte);
|
|
return;
|
|
} else {
|
|
mouse_command_active = 0;
|
|
received_bsync = 0;
|
|
}
|
|
}
|
|
PRINTF_MULT("0x%02x receive MOUSE\n", byte);
|
|
status |= KBD_STAT_IBF | KBD_STAT_OBF | KBD_STAT_MOUSE_OBF;
|
|
}
|
|
|
|
if (atomic_read(&ps2mult_buf_cnt) < PS2BUF_SIZE) {
|
|
ps2mult_buf_status[ps2mult_buf_in_idx] = status;
|
|
ps2mult_buf[ps2mult_buf_in_idx++] = byte;
|
|
ps2mult_buf_in_idx &= (PS2BUF_SIZE - 1);
|
|
atomic_inc(&ps2mult_buf_cnt);
|
|
} else {
|
|
PRINTF("buffer overflow\n");
|
|
}
|
|
|
|
if (received_bsync) {
|
|
PRINTF("unexpected BSYNC\n");
|
|
received_bsync = 0;
|
|
}
|
|
}
|
|
|
|
void ps2mult_callback (int in_cnt)
|
|
{
|
|
int i;
|
|
u_char byte;
|
|
static int keyb_handler_active = 0;
|
|
|
|
if (!init_done) {
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < in_cnt; i ++) {
|
|
byte = ps2ser_getc();
|
|
|
|
if (received_escape) {
|
|
ps2mult_receive_byte(byte, received_selector);
|
|
received_escape = 0;
|
|
} else switch (byte) {
|
|
case PS2MULT_ESCAPE:
|
|
PRINTF_MULT("ESCAPE receive\n");
|
|
received_escape = 1;
|
|
break;
|
|
|
|
case PS2MULT_BSYNC:
|
|
PRINTF_MULT("BSYNC receive\n");
|
|
received_bsync = 1;
|
|
break;
|
|
|
|
case PS2MULT_KB_SELECTOR:
|
|
case PS2MULT_MS_SELECTOR:
|
|
PRINTF_MULT("%s receive\n",
|
|
byte == PS2MULT_KB_SELECTOR ? "KB_SEL" : "MS_SEL");
|
|
received_selector = byte;
|
|
break;
|
|
|
|
case PS2MULT_SESSION_START:
|
|
case PS2MULT_SESSION_END:
|
|
PRINTF_MULT("%s receive\n",
|
|
byte == PS2MULT_SESSION_START ?
|
|
"SESSION_START" : "SESSION_END");
|
|
break;
|
|
|
|
default:
|
|
ps2mult_receive_byte(byte, received_selector);
|
|
}
|
|
}
|
|
|
|
if (keyb_handler && !keyb_handler_active &&
|
|
atomic_read(&ps2mult_buf_cnt)) {
|
|
keyb_handler_active = 1;
|
|
keyb_handler(NULL);
|
|
keyb_handler_active = 0;
|
|
}
|
|
}
|
|
|
|
u_char ps2mult_read_status(void)
|
|
{
|
|
u_char byte;
|
|
|
|
if (atomic_read(&ps2mult_buf_cnt) == 0) {
|
|
ps2ser_check();
|
|
}
|
|
|
|
if (atomic_read(&ps2mult_buf_cnt)) {
|
|
byte = ps2mult_buf_status[ps2mult_buf_out_idx];
|
|
} else {
|
|
byte = KBD_STAT_DEFAULT;
|
|
}
|
|
PRINTF_KEYB("read_status()=0x%02x\n", byte);
|
|
return byte;
|
|
}
|
|
|
|
u_char ps2mult_read_input(void)
|
|
{
|
|
u_char byte = 0;
|
|
|
|
if (atomic_read(&ps2mult_buf_cnt) == 0) {
|
|
ps2ser_check();
|
|
}
|
|
|
|
if (atomic_read(&ps2mult_buf_cnt)) {
|
|
byte = ps2mult_buf[ps2mult_buf_out_idx++];
|
|
ps2mult_buf_out_idx &= (PS2BUF_SIZE - 1);
|
|
atomic_dec(&ps2mult_buf_cnt);
|
|
}
|
|
PRINTF_KEYB("read_input()=0x%02x\n", byte);
|
|
return byte;
|
|
}
|
|
|
|
void ps2mult_write_output(u_char val)
|
|
{
|
|
int i;
|
|
|
|
PRINTF_KEYB("write_output(0x%02x)\n", val);
|
|
|
|
for (i = 0; i < KBD_TIMEOUT; i++) {
|
|
if (!kbd_command_active && !mouse_command_active) {
|
|
break;
|
|
}
|
|
udelay(1000);
|
|
ps2ser_check();
|
|
}
|
|
|
|
if (kbd_command_active) {
|
|
PRINTF("keyboard command not acknoledged\n");
|
|
kbd_command_active = 0;
|
|
}
|
|
|
|
if (mouse_command_active) {
|
|
PRINTF("mouse command not acknoledged\n");
|
|
mouse_command_active = 0;
|
|
}
|
|
|
|
if (ctl_command_active) {
|
|
switch (ctl_command_active) {
|
|
case KBD_CCMD_WRITE_MODE:
|
|
/* Scan code conversion not supported */
|
|
command_byte = val & ~KBD_MODE_KCC;
|
|
break;
|
|
|
|
case KBD_CCMD_WRITE_AUX_OBUF:
|
|
ps2mult_receive_byte(val, PS2MULT_MS_SELECTOR);
|
|
break;
|
|
|
|
case KBD_CCMD_WRITE_MOUSE:
|
|
ps2mult_send_byte(val, PS2MULT_MS_SELECTOR);
|
|
break;
|
|
|
|
default:
|
|
PRINTF("invalid controller command\n");
|
|
break;
|
|
}
|
|
|
|
ctl_command_active = 0;
|
|
return;
|
|
}
|
|
|
|
ps2mult_send_byte(val, PS2MULT_KB_SELECTOR);
|
|
}
|
|
|
|
void ps2mult_write_command(u_char val)
|
|
{
|
|
ctl_command_active = 0;
|
|
|
|
PRINTF_KEYB("write_command(0x%02x)\n", val);
|
|
|
|
switch (val) {
|
|
case KBD_CCMD_READ_MODE:
|
|
ps2mult_receive_byte(command_byte, PS2MULT_KB_SELECTOR);
|
|
break;
|
|
|
|
case KBD_CCMD_WRITE_MODE:
|
|
ctl_command_active = val;
|
|
break;
|
|
|
|
case KBD_CCMD_MOUSE_DISABLE:
|
|
break;
|
|
|
|
case KBD_CCMD_MOUSE_ENABLE:
|
|
break;
|
|
|
|
case KBD_CCMD_SELF_TEST:
|
|
ps2mult_receive_byte(0x55, PS2MULT_KB_SELECTOR);
|
|
break;
|
|
|
|
case KBD_CCMD_KBD_TEST:
|
|
ps2mult_receive_byte(0x00, PS2MULT_KB_SELECTOR);
|
|
break;
|
|
|
|
case KBD_CCMD_KBD_DISABLE:
|
|
break;
|
|
|
|
case KBD_CCMD_KBD_ENABLE:
|
|
break;
|
|
|
|
case KBD_CCMD_WRITE_AUX_OBUF:
|
|
ctl_command_active = val;
|
|
break;
|
|
|
|
case KBD_CCMD_WRITE_MOUSE:
|
|
ctl_command_active = val;
|
|
break;
|
|
|
|
default:
|
|
PRINTF("invalid controller command\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int ps2mult_getc_w (void)
|
|
{
|
|
int res = -1;
|
|
int i;
|
|
|
|
for (i = 0; i < KBD_TIMEOUT; i++) {
|
|
if (ps2ser_check()) {
|
|
res = ps2ser_getc();
|
|
break;
|
|
}
|
|
udelay(1000);
|
|
}
|
|
|
|
switch (res) {
|
|
case PS2MULT_KB_SELECTOR:
|
|
case PS2MULT_MS_SELECTOR:
|
|
received_selector = res;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
int ps2mult_init (void)
|
|
{
|
|
int byte;
|
|
int kbd_found = 0;
|
|
int mouse_found = 0;
|
|
|
|
while (get_timer(start_time) < CONFIG_PS2MULT_DELAY);
|
|
|
|
ps2ser_init();
|
|
|
|
ps2ser_putc(PS2MULT_SESSION_START);
|
|
|
|
ps2ser_putc(PS2MULT_KB_SELECTOR);
|
|
ps2ser_putc(KBD_CMD_RESET);
|
|
|
|
do {
|
|
byte = ps2mult_getc_w();
|
|
} while (byte >= 0 && byte != KBD_REPLY_ACK);
|
|
|
|
if (byte == KBD_REPLY_ACK) {
|
|
byte = ps2mult_getc_w();
|
|
if (byte == 0xaa) {
|
|
kbd_found = 1;
|
|
puts("keyboard");
|
|
}
|
|
}
|
|
|
|
if (!kbd_found) {
|
|
while (byte >= 0) {
|
|
byte = ps2mult_getc_w();
|
|
}
|
|
}
|
|
|
|
#if 1 /* detect mouse */
|
|
ps2ser_putc(PS2MULT_MS_SELECTOR);
|
|
ps2ser_putc(AUX_RESET);
|
|
|
|
do {
|
|
byte = ps2mult_getc_w();
|
|
} while (byte >= 0 && byte != AUX_ACK);
|
|
|
|
if (byte == AUX_ACK) {
|
|
byte = ps2mult_getc_w();
|
|
if (byte == 0xaa) {
|
|
byte = ps2mult_getc_w();
|
|
if (byte == 0x00) {
|
|
mouse_found = 1;
|
|
puts(", mouse");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!mouse_found) {
|
|
while (byte >= 0) {
|
|
byte = ps2mult_getc_w();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (mouse_found || kbd_found) {
|
|
if (!received_selector) {
|
|
if (mouse_found) {
|
|
received_selector = PS2MULT_MS_SELECTOR;
|
|
} else {
|
|
received_selector = PS2MULT_KB_SELECTOR;
|
|
}
|
|
}
|
|
|
|
init_done = 1;
|
|
} else {
|
|
puts("No device found");
|
|
}
|
|
|
|
puts("\n");
|
|
|
|
#if 0 /* for testing */
|
|
{
|
|
int i;
|
|
u_char key[] = {
|
|
0x1f, 0x12, 0x14, 0x12, 0x31, 0x2f, 0x39, /* setenv */
|
|
0x1f, 0x14, 0x20, 0x17, 0x31, 0x39, /* stdin */
|
|
0x1f, 0x12, 0x13, 0x17, 0x1e, 0x26, 0x1c, /* serial */
|
|
};
|
|
|
|
for (i = 0; i < sizeof (key); i++) {
|
|
ps2mult_receive_byte (key[i], PS2MULT_KB_SELECTOR);
|
|
ps2mult_receive_byte (key[i] | 0x80, PS2MULT_KB_SELECTOR);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return init_done ? 0 : -1;
|
|
}
|
|
|
|
int ps2mult_request_irq(void (*handler)(void *))
|
|
{
|
|
keyb_handler = handler;
|
|
|
|
return 0;
|
|
}
|