linux/drivers/input/joystick/guillemot.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

268 lines
6.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2001 Vojtech Pavlik
*/
/*
* Guillemot Digital Interface Protocol driver for Linux
*/
/*
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/gameport.h>
#include <linux/input.h>
#include <linux/jiffies.h>
#define DRIVER_DESC "Guillemot Digital joystick driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
#define GUILLEMOT_MAX_START 600 /* 600 us */
#define GUILLEMOT_MAX_STROBE 60 /* 60 us */
#define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */
static short guillemot_abs_pad[] =
{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
static short guillemot_btn_pad[] =
{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
static struct {
int x;
int y;
} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
struct guillemot_type {
unsigned char id;
short *abs;
short *btn;
int hat;
char *name;
};
struct guillemot {
struct gameport *gameport;
struct input_dev *dev;
int bads;
int reads;
struct guillemot_type *type;
unsigned char length;
char phys[32];
};
static struct guillemot_type guillemot_type[] = {
{ 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
{ 0 }};
/*
* guillemot_read_packet() reads Guillemot joystick data.
*/
static int guillemot_read_packet(struct gameport *gameport, u8 *data)
{
unsigned long flags;
unsigned char u, v;
unsigned int t, s;
int i;
for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
data[i] = 0;
i = 0;
t = gameport_time(gameport, GUILLEMOT_MAX_START);
s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
local_irq_save(flags);
gameport_trigger(gameport);
v = gameport_read(gameport);
while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
t--;
u = v; v = gameport_read(gameport);
if (v & ~u & 0x10) {
data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
i++;
t = s;
}
}
local_irq_restore(flags);
return i;
}
/*
* guillemot_poll() reads and analyzes Guillemot joystick data.
*/
static void guillemot_poll(struct gameport *gameport)
{
struct guillemot *guillemot = gameport_get_drvdata(gameport);
struct input_dev *dev = guillemot->dev;
u8 data[GUILLEMOT_MAX_LENGTH];
int i;
guillemot->reads++;
if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
data[0] != 0x55 || data[16] != 0xaa) {
guillemot->bads++;
} else {
for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
if (guillemot->type->hat) {
input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
}
for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
}
input_sync(dev);
}
/*
* guillemot_open() is a callback from the input open routine.
*/
static int guillemot_open(struct input_dev *dev)
{
struct guillemot *guillemot = input_get_drvdata(dev);
gameport_start_polling(guillemot->gameport);
return 0;
}
/*
* guillemot_close() is a callback from the input close routine.
*/
static void guillemot_close(struct input_dev *dev)
{
struct guillemot *guillemot = input_get_drvdata(dev);
gameport_stop_polling(guillemot->gameport);
}
/*
* guillemot_connect() probes for Guillemot joysticks.
*/
static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
{
struct guillemot *guillemot;
struct input_dev *input_dev;
u8 data[GUILLEMOT_MAX_LENGTH];
int i, t;
int err;
guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
input_dev = input_allocate_device();
if (!guillemot || !input_dev) {
err = -ENOMEM;
goto fail1;
}
guillemot->gameport = gameport;
guillemot->dev = input_dev;
gameport_set_drvdata(gameport, guillemot);
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
if (err)
goto fail1;
i = guillemot_read_packet(gameport, data);
if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
err = -ENODEV;
goto fail2;
}
for (i = 0; guillemot_type[i].name; i++)
if (guillemot_type[i].id == data[11])
break;
if (!guillemot_type[i].name) {
printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
gameport->phys, data[12], data[13], data[11], data[14], data[15]);
err = -ENODEV;
goto fail2;
}
gameport_set_poll_handler(gameport, guillemot_poll);
gameport_set_poll_interval(gameport, 20);
snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
guillemot->type = guillemot_type + i;
input_dev->name = guillemot_type[i].name;
input_dev->phys = guillemot->phys;
input_dev->id.bustype = BUS_GAMEPORT;
input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
input_dev->id.product = guillemot_type[i].id;
input_dev->id.version = (int)data[14] << 8 | data[15];
input_dev->dev.parent = &gameport->dev;
input_set_drvdata(input_dev, guillemot);
input_dev->open = guillemot_open;
input_dev->close = guillemot_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
input_set_abs_params(input_dev, t, 0, 255, 0, 0);
if (guillemot->type->hat) {
input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
}
for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
set_bit(t, input_dev->keybit);
err = input_register_device(guillemot->dev);
if (err)
goto fail2;
return 0;
fail2: gameport_close(gameport);
fail1: gameport_set_drvdata(gameport, NULL);
input_free_device(input_dev);
kfree(guillemot);
return err;
}
static void guillemot_disconnect(struct gameport *gameport)
{
struct guillemot *guillemot = gameport_get_drvdata(gameport);
printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
input_unregister_device(guillemot->dev);
gameport_close(gameport);
kfree(guillemot);
}
static struct gameport_driver guillemot_drv = {
.driver = {
.name = "guillemot",
},
.description = DRIVER_DESC,
.connect = guillemot_connect,
.disconnect = guillemot_disconnect,
};
module_gameport_driver(guillemot_drv);