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linux-stable/drivers/input/keyboard/sunkbd.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

355 lines
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// 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 0x1
#define SUNKBD_CMD_BELLON 0x2
#define SUNKBD_CMD_BELLOFF 0x3
#define SUNKBD_CMD_CLICK 0xa
#define SUNKBD_CMD_NOCLICK 0xb
#define SUNKBD_CMD_SETLED 0xe
#define SUNKBD_CMD_LAYOUT 0xf
#define SUNKBD_RET_RESET 0xff
#define SUNKBD_RET_ALLUP 0x7f
#define SUNKBD_RET_LAYOUT 0xfe
#define SUNKBD_LAYOUT_5_MASK 0x20
#define SUNKBD_RELEASE 0x80
#define SUNKBD_KEY 0x7f
/*
* 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:
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_reinit() sets leds and beeps to a state the computer remembers they
* were in.
*/
static void sunkbd_reinit(struct work_struct *work)
{
struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
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));
}
static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
{
serio_pause_rx(sunkbd->serio);
sunkbd->enabled = enable;
serio_continue_rx(sunkbd->serio);
}
/*
* 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(struct 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 = 0x0100;
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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