291 lines
7.3 KiB
C
291 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 1999-2001 Vojtech Pavlik
|
|
*
|
|
* Based on the work of:
|
|
* David Thompson
|
|
* Joseph Krahn
|
|
*/
|
|
|
|
/*
|
|
* SpaceTec SpaceBall 2003/3003/4000 FLX driver for Linux
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/serio.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#define DRIVER_DESC "SpaceTec SpaceBall 2003/3003/4000 FLX driver"
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/*
|
|
* Constants.
|
|
*/
|
|
|
|
#define SPACEBALL_MAX_LENGTH 128
|
|
#define SPACEBALL_MAX_ID 9
|
|
|
|
#define SPACEBALL_1003 1
|
|
#define SPACEBALL_2003B 3
|
|
#define SPACEBALL_2003C 4
|
|
#define SPACEBALL_3003C 7
|
|
#define SPACEBALL_4000FLX 8
|
|
#define SPACEBALL_4000FLX_L 9
|
|
|
|
static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY };
|
|
static char *spaceball_names[] = {
|
|
"?", "SpaceTec SpaceBall 1003", "SpaceTec SpaceBall 2003", "SpaceTec SpaceBall 2003B",
|
|
"SpaceTec SpaceBall 2003C", "SpaceTec SpaceBall 3003", "SpaceTec SpaceBall SpaceController",
|
|
"SpaceTec SpaceBall 3003C", "SpaceTec SpaceBall 4000FLX", "SpaceTec SpaceBall 4000FLX Lefty" };
|
|
|
|
/*
|
|
* Per-Ball data.
|
|
*/
|
|
|
|
struct spaceball {
|
|
struct input_dev *dev;
|
|
int idx;
|
|
int escape;
|
|
unsigned char data[SPACEBALL_MAX_LENGTH];
|
|
char phys[32];
|
|
};
|
|
|
|
/*
|
|
* spaceball_process_packet() decodes packets the driver receives from the
|
|
* SpaceBall.
|
|
*/
|
|
|
|
static void spaceball_process_packet(struct spaceball* spaceball)
|
|
{
|
|
struct input_dev *dev = spaceball->dev;
|
|
unsigned char *data = spaceball->data;
|
|
int i;
|
|
|
|
if (spaceball->idx < 2) return;
|
|
|
|
switch (spaceball->data[0]) {
|
|
|
|
case 'D': /* Ball data */
|
|
if (spaceball->idx != 15) return;
|
|
/*
|
|
* Skip first three bytes; read six axes worth of data.
|
|
* Axis values are signed 16-bit big-endian.
|
|
*/
|
|
data += 3;
|
|
for (i = 0; i < ARRAY_SIZE(spaceball_axes); i++) {
|
|
input_report_abs(dev, spaceball_axes[i],
|
|
(__s16)get_unaligned_be16(&data[i * 2]));
|
|
}
|
|
break;
|
|
|
|
case 'K': /* Button data */
|
|
if (spaceball->idx != 3) return;
|
|
input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20));
|
|
input_report_key(dev, BTN_2, data[2] & 0x02);
|
|
input_report_key(dev, BTN_3, data[2] & 0x04);
|
|
input_report_key(dev, BTN_4, data[2] & 0x08);
|
|
input_report_key(dev, BTN_5, data[1] & 0x01);
|
|
input_report_key(dev, BTN_6, data[1] & 0x02);
|
|
input_report_key(dev, BTN_7, data[1] & 0x04);
|
|
input_report_key(dev, BTN_8, data[1] & 0x10);
|
|
break;
|
|
|
|
case '.': /* Advanced button data */
|
|
if (spaceball->idx != 3) return;
|
|
input_report_key(dev, BTN_1, data[2] & 0x01);
|
|
input_report_key(dev, BTN_2, data[2] & 0x02);
|
|
input_report_key(dev, BTN_3, data[2] & 0x04);
|
|
input_report_key(dev, BTN_4, data[2] & 0x08);
|
|
input_report_key(dev, BTN_5, data[2] & 0x10);
|
|
input_report_key(dev, BTN_6, data[2] & 0x20);
|
|
input_report_key(dev, BTN_7, data[2] & 0x80);
|
|
input_report_key(dev, BTN_8, data[1] & 0x01);
|
|
input_report_key(dev, BTN_9, data[1] & 0x02);
|
|
input_report_key(dev, BTN_A, data[1] & 0x04);
|
|
input_report_key(dev, BTN_B, data[1] & 0x08);
|
|
input_report_key(dev, BTN_C, data[1] & 0x10);
|
|
input_report_key(dev, BTN_MODE, data[1] & 0x20);
|
|
break;
|
|
|
|
case 'E': /* Device error */
|
|
spaceball->data[spaceball->idx - 1] = 0;
|
|
printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1);
|
|
break;
|
|
|
|
case '?': /* Bad command packet */
|
|
spaceball->data[spaceball->idx - 1] = 0;
|
|
printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1);
|
|
break;
|
|
}
|
|
|
|
input_sync(dev);
|
|
}
|
|
|
|
/*
|
|
* Spaceball 4000 FLX packets all start with a one letter packet-type decriptor,
|
|
* and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which
|
|
* can occur in the axis values.
|
|
*/
|
|
|
|
static irqreturn_t spaceball_interrupt(struct serio *serio,
|
|
unsigned char data, unsigned int flags)
|
|
{
|
|
struct spaceball *spaceball = serio_get_drvdata(serio);
|
|
|
|
switch (data) {
|
|
case 0xd:
|
|
spaceball_process_packet(spaceball);
|
|
spaceball->idx = 0;
|
|
spaceball->escape = 0;
|
|
break;
|
|
case '^':
|
|
if (!spaceball->escape) {
|
|
spaceball->escape = 1;
|
|
break;
|
|
}
|
|
spaceball->escape = 0;
|
|
fallthrough;
|
|
case 'M':
|
|
case 'Q':
|
|
case 'S':
|
|
if (spaceball->escape) {
|
|
spaceball->escape = 0;
|
|
data &= 0x1f;
|
|
}
|
|
fallthrough;
|
|
default:
|
|
if (spaceball->escape)
|
|
spaceball->escape = 0;
|
|
if (spaceball->idx < SPACEBALL_MAX_LENGTH)
|
|
spaceball->data[spaceball->idx++] = data;
|
|
break;
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* spaceball_disconnect() is the opposite of spaceball_connect()
|
|
*/
|
|
|
|
static void spaceball_disconnect(struct serio *serio)
|
|
{
|
|
struct spaceball* spaceball = serio_get_drvdata(serio);
|
|
|
|
serio_close(serio);
|
|
serio_set_drvdata(serio, NULL);
|
|
input_unregister_device(spaceball->dev);
|
|
kfree(spaceball);
|
|
}
|
|
|
|
/*
|
|
* spaceball_connect() is the routine that is called when someone adds a
|
|
* new serio device that supports Spaceball protocol and registers it as
|
|
* an input device.
|
|
*/
|
|
|
|
static int spaceball_connect(struct serio *serio, struct serio_driver *drv)
|
|
{
|
|
struct spaceball *spaceball;
|
|
struct input_dev *input_dev;
|
|
int err = -ENOMEM;
|
|
int i, id;
|
|
|
|
if ((id = serio->id.id) > SPACEBALL_MAX_ID)
|
|
return -ENODEV;
|
|
|
|
spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL);
|
|
input_dev = input_allocate_device();
|
|
if (!spaceball || !input_dev)
|
|
goto fail1;
|
|
|
|
spaceball->dev = input_dev;
|
|
snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys);
|
|
|
|
input_dev->name = spaceball_names[id];
|
|
input_dev->phys = spaceball->phys;
|
|
input_dev->id.bustype = BUS_RS232;
|
|
input_dev->id.vendor = SERIO_SPACEBALL;
|
|
input_dev->id.product = id;
|
|
input_dev->id.version = 0x0100;
|
|
input_dev->dev.parent = &serio->dev;
|
|
|
|
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
|
|
|
|
switch (id) {
|
|
case SPACEBALL_4000FLX:
|
|
case SPACEBALL_4000FLX_L:
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_9);
|
|
input_dev->keybit[BIT_WORD(BTN_A)] |= BIT_MASK(BTN_A) |
|
|
BIT_MASK(BTN_B) | BIT_MASK(BTN_C) |
|
|
BIT_MASK(BTN_MODE);
|
|
fallthrough;
|
|
default:
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_2) |
|
|
BIT_MASK(BTN_3) | BIT_MASK(BTN_4) |
|
|
BIT_MASK(BTN_5) | BIT_MASK(BTN_6) |
|
|
BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
|
|
fallthrough;
|
|
case SPACEBALL_3003C:
|
|
input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1) |
|
|
BIT_MASK(BTN_8);
|
|
}
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40);
|
|
input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8);
|
|
}
|
|
|
|
serio_set_drvdata(serio, spaceball);
|
|
|
|
err = serio_open(serio, drv);
|
|
if (err)
|
|
goto fail2;
|
|
|
|
err = input_register_device(spaceball->dev);
|
|
if (err)
|
|
goto fail3;
|
|
|
|
return 0;
|
|
|
|
fail3: serio_close(serio);
|
|
fail2: serio_set_drvdata(serio, NULL);
|
|
fail1: input_free_device(input_dev);
|
|
kfree(spaceball);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* The serio driver structure.
|
|
*/
|
|
|
|
static const struct serio_device_id spaceball_serio_ids[] = {
|
|
{
|
|
.type = SERIO_RS232,
|
|
.proto = SERIO_SPACEBALL,
|
|
.id = SERIO_ANY,
|
|
.extra = SERIO_ANY,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(serio, spaceball_serio_ids);
|
|
|
|
static struct serio_driver spaceball_drv = {
|
|
.driver = {
|
|
.name = "spaceball",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = spaceball_serio_ids,
|
|
.interrupt = spaceball_interrupt,
|
|
.connect = spaceball_connect,
|
|
.disconnect = spaceball_disconnect,
|
|
};
|
|
|
|
module_serio_driver(spaceball_drv);
|