// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 1998-2005 Vojtech Pavlik
*/
/*
* Logitech ADI joystick family driver for Linux
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/jiffies.h>
#define DRIVER_DESC "Logitech ADI joystick family driver"
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Times, array sizes, flags, ids.
*/
#define ADI_MAX_START 200 /* Trigger to packet timeout [200us] */
#define ADI_MAX_STROBE 40 /* Single bit timeout [40us] */
#define ADI_INIT_DELAY 10 /* Delay after init packet [10ms] */
#define ADI_DATA_DELAY 4 /* Delay after data packet [4ms] */
#define ADI_MAX_LENGTH 256
#define ADI_MIN_LENGTH 8
#define ADI_MIN_LEN_LENGTH 10
#define ADI_MIN_ID_LENGTH 66
#define ADI_MAX_NAME_LENGTH 64
#define ADI_MAX_CNAME_LENGTH 16
#define ADI_MAX_PHYS_LENGTH 64
#define ADI_FLAG_HAT 0x04
#define ADI_FLAG_10BIT 0x08
#define ADI_ID_TPD 0x01
#define ADI_ID_WGP 0x06
#define ADI_ID_WGPE 0x08
#define ADI_ID_MAX 0x0a
/*
* Names, buttons, axes ...
*/
static char *adi_names[] = { "WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
"WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
"WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
"WingMan GamePad USB", "Unknown Device %#x" };
static char adi_wmgpe_abs[] = { ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
static char adi_wmi_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
static char adi_wmed3d_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
static char adi_cm2_abs[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
static char adi_wmf_abs[] = { ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
static short adi_wmgpe_key[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
static short adi_wmi_key[] = { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
static short adi_wmed3d_key[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
static short adi_cm2_key[] = { BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
/*
* Hat to axis conversion arrays.
*/
static struct {
int x;
int y;
} adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
/*
* Per-port information.
*/
struct adi {
struct input_dev *dev;
int length;
int ret;
int idx;
unsigned char id;
char buttons;
char axes10;
char axes8;
signed char pad;
char hats;
char *abs;
short *key;
char name[ADI_MAX_NAME_LENGTH];
char cname[ADI_MAX_CNAME_LENGTH];
char phys[ADI_MAX_PHYS_LENGTH];
unsigned char data[ADI_MAX_LENGTH];
};
struct adi_port {
struct gameport *gameport;
struct adi adi[2];
int bad;
int reads;
};
/*
* adi_read_packet() reads a Logitech ADI packet.
*/
static void adi_read_packet(struct adi_port *port)
{
struct adi *adi = port->adi;
struct gameport *gameport = port->gameport;
unsigned char u, v, w, x;
int t[2], s[2], i;
unsigned long flags;
for (i = 0; i < 2; i++) {
adi[i].ret = -1;
t[i] = gameport_time(gameport, ADI_MAX_START);
s[i] = 0;
}
local_irq_save(flags);
gameport_trigger(gameport);
v = gameport_read(gameport);
do {
u = v;
w = u ^ (v = x = gameport_read(gameport));
for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
t[i]--;
if ((w & 0x30) && s[i]) {
if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
adi[i].data[++adi[i].ret] = w;
t[i] = gameport_time(gameport, ADI_MAX_STROBE);
} else t[i] = 0;
} else if (!(x & 0x30)) s[i] = 1;
}
} while (t[0] > 0 || t[1] > 0);
local_irq_restore(flags);
return;
}
/*
* adi_move_bits() detects a possible 2-stream mode, and moves
* the bits accordingly.
*/
static void adi_move_bits(struct adi_port *port, int length)
{
int i;
struct adi *adi = port->adi;
adi[0].idx = adi[1].idx = 0;
if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
for (i = 1; i <= adi[1].ret; i++)
adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
adi[0].ret += adi[1].ret;
adi[1].ret = -1;
}
/*
* adi_get_bits() gathers bits from the data packet.
*/
static inline int adi_get_bits(struct adi *adi, int count)
{
int bits = 0;
int i;
if ((adi->idx += count) > adi->ret) return 0;
for (i = 0; i < count; i++)
bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
return bits;
}
/*
* adi_decode() decodes Logitech joystick data into input events.
*/
static int adi_decode(struct adi *adi)
{
struct input_dev *dev = adi->dev;
char *abs = adi->abs;
short *key = adi->key;
int i, t;
if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
return -1;
for (i = 0; i < adi->axes10; i++)
input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
for (i = 0; i < adi->axes8; i++)
input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
for (i = 0; i < adi->buttons && i < 63; i++) {
if (i == adi->pad) {
t = adi_get_bits(adi, 4);
input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t & 1));
input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
}
input_report_key(dev, *key++, adi_get_bits(adi, 1));
}
for (i = 0; i < adi->hats; i++) {
if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
}
for (i = 63; i < adi->buttons; i++)
input_report_key(dev, *key++, adi_get_bits(adi, 1));
input_sync(dev);
return 0;
}
/*
* adi_read() reads the data packet and decodes it.
*/
static int adi_read(struct adi_port *port)
{
int i;
int result = 0;
adi_read_packet(port);
adi_move_bits(port, port->adi[0].length);
for (i = 0; i < 2; i++)
if (port->adi[i].length)
result |= adi_decode(port->adi + i);
return result;
}
/*
* adi_poll() repeatedly polls the Logitech joysticks.
*/
static void adi_poll(struct gameport *gameport)
{
struct adi_port *port = gameport_get_drvdata(gameport);
port->bad -= adi_read(port);
port->reads++;
}
/*
* adi_open() is a callback from the input open routine.
*/
static int adi_open(struct input_dev *dev)
{
struct adi_port *port = input_get_drvdata(dev);
gameport_start_polling(port->gameport);
return 0;
}
/*
* adi_close() is a callback from the input close routine.
*/
static void adi_close(struct input_dev *dev)
{
struct adi_port *port = input_get_drvdata(dev);
gameport_stop_polling(port->gameport);
}
/*
* adi_init_digital() sends a trigger & delay sequence
* to reset and initialize a Logitech joystick into digital mode.
*/
static void adi_init_digital(struct gameport *gameport)
{
static const int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
int i;
for (i = 0; seq[i]; i++) {
gameport_trigger(gameport);
if (seq[i] > 0)
msleep(seq[i]);
if (seq[i] < 0) {
mdelay(-seq[i]);
udelay(-seq[i]*14); /* It looks like mdelay() is off by approx 1.4% */
}
}
}
static void adi_id_decode(struct adi *adi, struct adi_port *port)
{
int i, t;
if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
return;
if (adi->ret < (t = adi_get_bits(adi, 10))) {
printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
return;
}
adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
adi->length = adi_get_bits(adi, 10);
if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
adi->length = 0;
return;
}
adi->axes8 = adi_get_bits(adi, 4);
adi->buttons = adi_get_bits(adi, 6);
if (adi_get_bits(adi, 6) != 8 && adi->hats) {
printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
adi->length = 0;
return;
}
adi->buttons += adi_get_bits(adi, 6);
adi->hats += adi_get_bits(adi, 4);
i = adi_get_bits(adi, 4);
if (t & ADI_FLAG_10BIT) {
adi->axes10 = adi->axes8 - i;
adi->axes8 = i;
}
t = adi_get_bits(adi, 4);
for (i = 0; i < t; i++)
adi->cname[i] = adi_get_bits(adi, 8);
adi->cname[i] = 0;
t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
if (adi->length != t && adi->length != t + (t & 1)) {
printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
adi->length = 0;
return;
}
switch (adi->id) {
case ADI_ID_TPD:
adi->pad = 4;
adi->buttons -= 4;
break;
case ADI_ID_WGP:
adi->pad = 0;
adi->buttons -= 4;
break;
default:
adi->pad = -1;
break;
}
}
static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
{
struct input_dev *input_dev;
char buf[ADI_MAX_NAME_LENGTH];
int i, t;
adi->dev = input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s [%s]", buf, adi->cname);
snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);
adi->abs = adi_abs[t];
adi->key = adi_key[t];
input_dev->name = adi->name;
input_dev->phys = adi->phys;
input_dev->id.bustype = BUS_GAMEPORT;
input_dev->id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
input_dev->id.product = adi->id;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &port->gameport->dev;
input_set_drvdata(input_dev, port);
input_dev->open = adi_open;
input_dev->close = adi_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
set_bit(adi->abs[i], input_dev->absbit);
for (i = 0; i < adi->buttons; i++)
set_bit(adi->key[i], input_dev->keybit);
return 0;
}
static void adi_init_center(struct adi *adi)
{
int i, t, x;
if (!adi->length)
return;
for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {
t = adi->abs[i];
x = input_abs_get_val(adi->dev, t);
if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
x = i < adi->axes10 ? 512 : 128;
if (i < adi->axes10)
input_set_abs_params(adi->dev, t, 64, x * 2 - 64, 2, 16);
else if (i < adi->axes10 + adi->axes8)
input_set_abs_params(adi->dev, t, 48, x * 2 - 48, 1, 16);
else
input_set_abs_params(adi->dev, t, -1, 1, 0, 0);
}
}
/*
* adi_connect() probes for Logitech ADI joysticks.
*/
static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
{
struct adi_port *port;
int i;
int err;
port = kzalloc(sizeof(*port), GFP_KERNEL);
if (!port)
return -ENOMEM;
port->gameport = gameport;
gameport_set_drvdata(gameport, port);
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
if (err)
goto fail1;
adi_init_digital(gameport);
adi_read_packet(port);
if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
adi_move_bits(port, adi_get_bits(port->adi, 10));
for (i = 0; i < 2; i++) {
adi_id_decode(port->adi + i, port);
if (!port->adi[i].length)
continue;
err = adi_init_input(port->adi + i, port, i);
if (err)
goto fail2;
}
if (!port->adi[0].length && !port->adi[1].length) {
err = -ENODEV;
goto fail2;
}
gameport_set_poll_handler(gameport, adi_poll);
gameport_set_poll_interval(gameport, 20);
msleep(ADI_INIT_DELAY);
if (adi_read(port)) {
msleep(ADI_DATA_DELAY);
adi_read(port);
}
for (i = 0; i < 2; i++)
if (port->adi[i].length > 0) {
adi_init_center(port->adi + i);
err = input_register_device(port->adi[i].dev);
if (err)
goto fail3;
}
return 0;
fail3: while (--i >= 0) {
if (port->adi[i].length > 0) {
input_unregister_device(port->adi[i].dev);
port->adi[i].dev = NULL;
}
}
fail2: for (i = 0; i < 2; i++)
input_free_device(port->adi[i].dev);
gameport_close(gameport);
fail1: gameport_set_drvdata(gameport, NULL);
kfree(port);
return err;
}
static void adi_disconnect(struct gameport *gameport)
{
int i;
struct adi_port *port = gameport_get_drvdata(gameport);
for (i = 0; i < 2; i++)
if (port->adi[i].length > 0)
input_unregister_device(port->adi[i].dev);
gameport_close(gameport);
gameport_set_drvdata(gameport, NULL);
kfree(port);
}
static struct gameport_driver adi_drv = {
.driver = {
.name = "adi",
},
.description = DRIVER_DESC,
.connect = adi_connect,
.disconnect = adi_disconnect,
};
module_gameport_driver(adi_drv);
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