/*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1999-2002 Harald Koerfgen <hkoerfg@web.de>
* Copyright (C) 2001, 2002, 2003, 2004 Maciej W. Rozycki
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/kbd_ll.h>
#include <linux/kbd_kern.h>
#include <linux/vt_kern.h>
#include <asm/keyboard.h>
#include <asm/dec/tc.h>
#include <asm/dec/machtype.h>
#include <asm/dec/serial.h>
#include "lk201.h"
/*
* Only handle DECstations that have an LK201 interface.
* Maxine uses LK501 at the Access.Bus and various DECsystems
* have no keyboard interface at all.
*/
#define LK_IFACE (mips_machtype == MACH_DS23100 || \
mips_machtype == MACH_DS5000_200 || \
mips_machtype == MACH_DS5000_1XX || \
mips_machtype == MACH_DS5000_2X0)
/*
* These use the Z8530 SCC. Others use the DZ11.
*/
#define LK_IFACE_ZS (mips_machtype == MACH_DS5000_1XX || \
mips_machtype == MACH_DS5000_2X0)
/* Simple translation table for the SysRq keys */
#ifdef CONFIG_MAGIC_SYSRQ
/*
* Actually no translation at all, at least until we figure out
* how to define SysRq for LK201 and friends. --macro
*/
unsigned char lk201_sysrq_xlate[128];
unsigned char *kbd_sysrq_xlate = lk201_sysrq_xlate;
unsigned char kbd_sysrq_key = -1;
#endif
#define KEYB_LINE 3
static int __init lk201_init(void *);
static void __init lk201_info(void *);
static void lk201_rx_char(unsigned char, unsigned char);
static struct dec_serial_hook lk201_hook = {
.init_channel = lk201_init,
.init_info = lk201_info,
.rx_char = NULL,
.poll_rx_char = NULL,
.poll_tx_char = NULL,
.cflags = B4800 | CS8 | CSTOPB | CLOCAL,
};
/*
* This is used during keyboard initialisation
*/
static unsigned char lk201_reset_string[] = {
LK_CMD_SET_DEFAULTS,
LK_CMD_MODE(LK_MODE_RPT_DOWN, 1),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 2),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 3),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 4),
LK_CMD_MODE(LK_MODE_DOWN_UP, 5),
LK_CMD_MODE(LK_MODE_DOWN_UP, 6),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 7),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 8),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 9),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 10),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 11),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 12),
LK_CMD_MODE(LK_MODE_DOWN, 13),
LK_CMD_MODE(LK_MODE_RPT_DOWN, 14),
LK_CMD_DIS_KEYCLK,
LK_CMD_ENB_BELL, LK_PARAM_VOLUME(4),
};
static void *lk201_handle;
static int lk201_send(unsigned char ch)
{
if (lk201_hook.poll_tx_char(lk201_handle, ch)) {
printk(KERN_ERR "lk201: transmit timeout\n");
return -EIO;
}
return 0;
}
static inline int lk201_get_id(void)
{
return lk201_send(LK_CMD_REQ_ID);
}
static int lk201_reset(void)
{
int i, r;
for (i = 0; i < sizeof(lk201_reset_string); i++) {
r = lk201_send(lk201_reset_string[i]);
if (r < 0)
return r;
}
return 0;
}
static void lk201_report(unsigned char id[6])
{
char *report = "lk201: keyboard attached, ";
switch (id[2]) {
case LK_STAT_PWRUP_OK:
printk(KERN_INFO "%sself-test OK\n", report);
break;
case LK_STAT_PWRUP_KDOWN:
/* The keyboard will resend the power-up ID
after all keys are released, so we don't
bother handling the error specially. Still
there may be a short-circuit inside.
*/
printk(KERN_ERR "%skey down (stuck?), code: 0x%02x\n",
report, id[3]);
break;
case LK_STAT_PWRUP_ERROR:
printk(KERN_ERR "%sself-test failure\n", report);
break;
default:
printk(KERN_ERR "%sunknown error: 0x%02x\n",
report, id[2]);
}
}
static void lk201_id(unsigned char id[6])
{
/*
* Report whether there is an LK201 or an LK401
* The LK401 has ALT keys...
*/
switch (id[4]) {
case 1:
printk(KERN_INFO "lk201: LK201 detected\n");
break;
case 2:
printk(KERN_INFO "lk201: LK401 detected\n");
break;
case 3:
printk(KERN_INFO "lk201: LK443 detected\n");
break;
case 4:
printk(KERN_INFO "lk201: LK421 detected\n");
break;
default:
printk(KERN_WARNING
"lk201: unknown keyboard detected, ID %d\n", id[4]);
printk(KERN_WARNING "lk201: ... please report to "
"<linux-mips@linux-mips.org>\n");
}
}
#define DEFAULT_KEYB_REP_DELAY (250/5) /* [5ms] */
#define DEFAULT_KEYB_REP_RATE 30 /* [cps] */
static struct kbd_repeat kbdrate = {
DEFAULT_KEYB_REP_DELAY,
DEFAULT_KEYB_REP_RATE
};
static void parse_kbd_rate(struct kbd_repeat *r)
{
if (r->delay <= 0)
r->delay = kbdrate.delay;
if (r->rate <= 0)
r->rate = kbdrate.rate;
if (r->delay < 5)
r->delay = 5;
if (r->delay > 630)
r->delay = 630;
if (r->rate < 12)
r->rate = 12;
if (r->rate > 127)
r->rate = 127;
if (r->rate == 125)
r->rate = 124;
}
static int write_kbd_rate(struct kbd_repeat *rep)
{
int delay, rate;
int i;
delay = rep->delay / 5;
rate = rep->rate;
for (i = 0; i < 4; i++) {
if (lk201_hook.poll_tx_char(lk201_handle,
LK_CMD_RPT_RATE(i)))
return 1;
if (lk201_hook.poll_tx_char(lk201_handle,
LK_PARAM_DELAY(delay)))
return 1;
if (lk201_hook.poll_tx_char(lk201_handle,
LK_PARAM_RATE(rate)))
return 1;
}
return 0;
}
static int lk201_kbd_rate(struct kbd_repeat *rep)
{
if (rep == NULL)
return -EINVAL;
parse_kbd_rate(rep);
if (write_kbd_rate(rep)) {
memcpy(rep, &kbdrate, sizeof(struct kbd_repeat));
return -EIO;
}
memcpy(&kbdrate, rep, sizeof(struct kbd_repeat));
return 0;
}
static void lk201_kd_mksound(unsigned int hz, unsigned int ticks)
{
if (!ticks)
return;
/*
* Can't set frequency and we "approximate"
* duration by volume. ;-)
*/
ticks /= HZ / 32;
if (ticks > 7)
ticks = 7;
ticks = 7 - ticks;
if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_ENB_BELL))
return;
if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_VOLUME(ticks)))
return;
if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_BELL))
return;
}
void kbd_leds(unsigned char leds)
{
unsigned char l = 0;
if (!lk201_handle) /* FIXME */
return;
/* FIXME -- Only Hold and Lock LEDs for now. --macro */
if (leds & LED_SCR)
l |= LK_LED_HOLD;
if (leds & LED_CAP)
l |= LK_LED_LOCK;
if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_LEDS_ON))
return;
if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_LED_MASK(l)))
return;
if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_LEDS_OFF))
return;
if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_LED_MASK(~l)))
return;
}
int kbd_setkeycode(unsigned int scancode, unsigned int keycode)
{
return -EINVAL;
}
int kbd_getkeycode(unsigned int scancode)
{
return -EINVAL;
}
int kbd_translate(unsigned char scancode, unsigned char *keycode,
char raw_mode)
{
*keycode = scancode;
return 1;
}
char kbd_unexpected_up(unsigned char keycode)
{
return 0x80;
}
static void lk201_rx_char(unsigned char ch, unsigned char fl)
{
static unsigned char id[6];
static int id_i;
static int shift_state = 0;
static int prev_scancode;
unsigned char c = scancodeRemap[ch];
if (fl != TTY_NORMAL && fl != TTY_OVERRUN) {
printk(KERN_ERR "lk201: keyboard receive error: 0x%02x\n", fl);
return;
}
/* Assume this is a power-up ID. */
if (ch == LK_STAT_PWRUP_ID && !id_i) {
id[id_i++] = ch;
return;
}
/* Handle the power-up sequence. */
if (id_i) {
id[id_i++] = ch;
if (id_i == 4) {
/* OK, the power-up concluded. */
lk201_report(id);
if (id[2] == LK_STAT_PWRUP_OK)
lk201_get_id();
else {
id_i = 0;
printk(KERN_ERR "lk201: keyboard power-up "
"error, skipping initialization\n");
}
} else if (id_i == 6) {
/* We got the ID; report it and start operation. */
id_i = 0;
lk201_id(id);
lk201_reset();
}
return;
}
/* Everything else is a scancode/status response. */
id_i = 0;
switch (ch) {
case LK_STAT_RESUME_ERR:
case LK_STAT_ERROR:
case LK_STAT_INHIBIT_ACK:
case LK_STAT_TEST_ACK:
case LK_STAT_MODE_KEYDOWN:
case LK_STAT_MODE_ACK:
break;
case LK_KEY_LOCK:
shift_state ^= LK_LOCK;
handle_scancode(c, (shift_state & LK_LOCK) ? 1 : 0);
break;
case LK_KEY_SHIFT:
shift_state ^= LK_SHIFT;
handle_scancode(c, (shift_state & LK_SHIFT) ? 1 : 0);
break;
case LK_KEY_CTRL:
shift_state ^= LK_CTRL;
handle_scancode(c, (shift_state & LK_CTRL) ? 1 : 0);
break;
case LK_KEY_COMP:
shift_state ^= LK_COMP;
handle_scancode(c, (shift_state & LK_COMP) ? 1 : 0);
break;
case LK_KEY_RELEASE:
if (shift_state & LK_SHIFT)
handle_scancode(scancodeRemap[LK_KEY_SHIFT], 0);
if (shift_state & LK_CTRL)
handle_scancode(scancodeRemap[LK_KEY_CTRL], 0);
if (shift_state & LK_COMP)
handle_scancode(scancodeRemap[LK_KEY_COMP], 0);
if (shift_state & LK_LOCK)
handle_scancode(scancodeRemap[LK_KEY_LOCK], 0);
shift_state = 0;
break;
case LK_KEY_REPEAT:
handle_scancode(prev_scancode, 1);
break;
default:
prev_scancode = c;
handle_scancode(c, 1);
break;
}
tasklet_schedule(&keyboard_tasklet);
}
static void __init lk201_info(void *handle)
{
}
static int __init lk201_init(void *handle)
{
/* First install handlers. */
lk201_handle = handle;
kbd_rate = lk201_kbd_rate;
kd_mksound = lk201_kd_mksound;
lk201_hook.rx_char = lk201_rx_char;
/* Then just issue a reset -- the handlers will do the rest. */
lk201_send(LK_CMD_POWER_UP);
return 0;
}
void __init kbd_init_hw(void)
{
/* Maxine uses LK501 at the Access.Bus. */
if (!LK_IFACE)
return;
printk(KERN_INFO "lk201: DECstation LK keyboard driver v0.05.\n");
if (LK_IFACE_ZS) {
/*
* kbd_init_hw() is being called before
* rs_init() so just register the kbd hook
* and let zs_init do the rest :-)
*/
if (!register_dec_serial_hook(KEYB_LINE, &lk201_hook))
unregister_dec_serial_hook(KEYB_LINE);
} else {
/*
* TODO: modify dz.c to allow similar hooks
* for LK201 handling on DS2100, DS3100, and DS5000/200
*/
printk(KERN_ERR "lk201: support for DZ11 not yet ready.\n");
}
}
