// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 1999-2001 Vojtech Pavlik
*/
/*
* Sun keyboard driver for Linux
*/
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/workqueue.h>
#define DRIVER_DESC "Sun keyboard driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" );
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL" );
static unsigned char sunkbd_keycode[128 ] = {
0 ,128 ,114 ,129 ,115 , 59 , 60 , 68 , 61 , 87 , 62 , 88 , 63 ,100 , 64 ,112 ,
65 , 66 , 67 , 56 ,103 ,119 , 99 , 70 ,105 ,130 ,131 ,108 ,106 , 1 , 2 , 3 ,
4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 41 , 14 ,110 ,113 , 98 , 55 ,
116 ,132 , 83 ,133 ,102 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ,
26 , 27 ,111 ,127 , 71 , 72 , 73 , 74 ,134 ,135 ,107 , 0 , 29 , 30 , 31 , 32 ,
33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 43 , 28 , 96 , 75 , 76 , 77 , 82 ,136 ,
104 ,137 , 69 , 42 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ,101 ,
79 , 80 , 81 , 0 , 0 , 0 ,138 , 58 ,125 , 57 ,126 ,109 , 86 , 78
};
#define SUNKBD_CMD_RESET 0 x1
#define SUNKBD_CMD_BELLON 0 x2
#define SUNKBD_CMD_BELLOFF 0 x3
#define SUNKBD_CMD_CLICK 0 xa
#define SUNKBD_CMD_NOCLICK 0 xb
#define SUNKBD_CMD_SETLED 0 xe
#define SUNKBD_CMD_LAYOUT 0 xf
#define SUNKBD_RET_RESET 0 xff
#define SUNKBD_RET_ALLUP 0 x7f
#define SUNKBD_RET_LAYOUT 0 xfe
#define SUNKBD_LAYOUT_5_MASK 0 x20
#define SUNKBD_RELEASE 0 x80
#define SUNKBD_KEY 0 x7f
/*
* Per-keyboard data.
*/
struct sunkbd {
unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
struct input_dev *dev;
struct serio *serio;
struct work_struct tq;
wait_queue_head_t wait;
char name[64 ];
char phys[32 ];
char type;
bool enabled;
volatile s8 reset;
volatile s8 layout;
};
/*
* sunkbd_interrupt() is called by the low level driver when a character
* is received.
*/
static irqreturn_t sunkbd_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct sunkbd *sunkbd = serio_get_drvdata(serio);
if (sunkbd->reset <= -1 ) {
/*
* If cp[i] is 0xff, sunkbd->reset will stay -1.
* The keyboard sends 0xff 0xff 0xID on powerup.
*/
sunkbd->reset = data;
wake_up_interruptible(&sunkbd->wait);
goto out;
}
if (sunkbd->layout == -1 ) {
sunkbd->layout = data;
wake_up_interruptible(&sunkbd->wait);
goto out;
}
switch (data) {
case SUNKBD_RET_RESET:
if (sunkbd->enabled)
schedule_work(&sunkbd->tq);
sunkbd->reset = -1 ;
break ;
case SUNKBD_RET_LAYOUT:
sunkbd->layout = -1 ;
break ;
case SUNKBD_RET_ALLUP: /* All keys released */
break ;
default :
if (!sunkbd->enabled)
break ;
if (sunkbd->keycode[data & SUNKBD_KEY]) {
input_report_key(sunkbd->dev,
sunkbd->keycode[data & SUNKBD_KEY],
!(data & SUNKBD_RELEASE));
input_sync(sunkbd->dev);
} else {
printk(KERN_WARNING
"sunkbd.c: Unknown key (scancode %#x) %s.\n" ,
data & SUNKBD_KEY,
data & SUNKBD_RELEASE ? "released" : "pressed" );
}
}
out:
return IRQ_HANDLED;
}
/*
* sunkbd_event() handles events from the input module.
*/
static int sunkbd_event(struct input_dev *dev,
unsigned int type, unsigned int code, int value)
{
struct sunkbd *sunkbd = input_get_drvdata(dev);
switch (type) {
case EV_LED:
serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
serio_write(sunkbd->serio,
(!!test_bit(LED_CAPSL, dev->led) << 3 ) |
(!!test_bit(LED_SCROLLL, dev->led) << 2 ) |
(!!test_bit(LED_COMPOSE, dev->led) << 1 ) |
!!test_bit(LED_NUML, dev->led));
return 0 ;
case EV_SND:
switch (code) {
case SND_CLICK:
serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
return 0 ;
case SND_BELL:
serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
return 0 ;
}
break ;
}
return -1 ;
}
/*
* sunkbd_initialize() checks for a Sun keyboard attached, and determines
* its type.
*/
static int sunkbd_initialize(struct sunkbd *sunkbd)
{
sunkbd->reset = -2 ;
serio_write(sunkbd->serio, SUNKBD_CMD_RESET);
wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0 , HZ);
if (sunkbd->reset < 0 )
return -1 ;
sunkbd->type = sunkbd->reset;
if (sunkbd->type == 4 ) { /* Type 4 keyboard */
sunkbd->layout = -2 ;
serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
wait_event_interruptible_timeout(sunkbd->wait,
sunkbd->layout >= 0 , HZ / 4 );
if (sunkbd->layout < 0 )
return -1 ;
if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK)
sunkbd->type = 5 ;
}
return 0 ;
}
/*
* sunkbd_set_leds_beeps() sets leds and beeps to a state the computer remembers
* they were in.
*/
static void sunkbd_set_leds_beeps(struct sunkbd *sunkbd)
{
serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
serio_write(sunkbd->serio,
(!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3 ) |
(!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2 ) |
(!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1 ) |
!!test_bit(LED_NUML, sunkbd->dev->led));
serio_write(sunkbd->serio,
SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
serio_write(sunkbd->serio,
SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
}
/*
* sunkbd_reinit() wait for the keyboard reset to complete and restores state
* of leds and beeps.
*/
static void sunkbd_reinit(struct work_struct *work)
{
struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
/*
* It is OK that we check sunkbd->enabled without pausing serio,
* as we only want to catch true->false transition that will
* happen once and we will be woken up for it.
*/
wait_event_interruptible_timeout(sunkbd->wait,
sunkbd->reset >= 0 || !sunkbd->enabled,
HZ);
if (sunkbd->reset >= 0 && sunkbd->enabled)
sunkbd_set_leds_beeps(sunkbd);
}
static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
{
scoped_guard(serio_pause_rx, sunkbd->serio)
sunkbd->enabled = enable;
if (!enable) {
wake_up_interruptible(&sunkbd->wait);
cancel_work_sync(&sunkbd->tq);
}
}
/*
* sunkbd_connect() probes for a Sun keyboard and fills the necessary
* structures.
*/
static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
{
struct sunkbd *sunkbd;
struct input_dev *input_dev;
int err = -ENOMEM;
int i;
sunkbd = kzalloc(sizeof (*sunkbd), GFP_KERNEL);
input_dev = input_allocate_device();
if (!sunkbd || !input_dev)
goto fail1;
sunkbd->serio = serio;
sunkbd->dev = input_dev;
init_waitqueue_head(&sunkbd->wait);
INIT_WORK(&sunkbd->tq, sunkbd_reinit);
snprintf(sunkbd->phys, sizeof (sunkbd->phys), "%s/input0" , serio->phys);
serio_set_drvdata(serio, sunkbd);
err = serio_open(serio, drv);
if (err)
goto fail2;
if (sunkbd_initialize(sunkbd) < 0 ) {
err = -ENODEV;
goto fail3;
}
snprintf(sunkbd->name, sizeof (sunkbd->name),
"Sun Type %d keyboard" , sunkbd->type);
memcpy(sunkbd->keycode, sunkbd_keycode, sizeof (sunkbd->keycode));
input_dev->name = sunkbd->name;
input_dev->phys = sunkbd->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_SUNKBD;
input_dev->id.product = sunkbd->type;
input_dev->id.version = 0 x0100;
input_dev->dev.parent = &serio->dev;
input_set_drvdata(input_dev, sunkbd);
input_dev->event = sunkbd_event;
input_dev->evbit[0 ] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
input_dev->ledbit[0 ] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
input_dev->sndbit[0 ] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);
input_dev->keycode = sunkbd->keycode;
input_dev->keycodesize = sizeof (unsigned char );
input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
for (i = 0 ; i < ARRAY_SIZE(sunkbd_keycode); i++)
__set_bit(sunkbd->keycode[i], input_dev->keybit);
__clear_bit(KEY_RESERVED, input_dev->keybit);
sunkbd_enable(sunkbd, true );
err = input_register_device(sunkbd->dev);
if (err)
goto fail4;
return 0 ;
fail4: sunkbd_enable(sunkbd, false );
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(sunkbd);
return err;
}
/*
* sunkbd_disconnect() unregisters and closes behind us.
*/
static void sunkbd_disconnect(struct serio *serio)
{
struct sunkbd *sunkbd = serio_get_drvdata(serio);
sunkbd_enable(sunkbd, false );
input_unregister_device(sunkbd->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
kfree(sunkbd);
}
static const struct serio_device_id sunkbd_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_SUNKBD,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{
.type = SERIO_RS232,
.proto = SERIO_UNKNOWN, /* sunkbd does probe */
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);
static struct serio_driver sunkbd_drv = {
.driver = {
.name = "sunkbd" ,
},
.description = DRIVER_DESC,
.id_table = sunkbd_serio_ids,
.interrupt = sunkbd_interrupt,
.connect = sunkbd_connect,
.disconnect = sunkbd_disconnect,
};
module_serio_driver(sunkbd_drv);
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