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linux/drivers/input/joystick/db9.c
Erick Archer 4654c4cc79 Input: joystick - use sizeof(*pointer) instead of sizeof(type) 
It is preferred to use sizeof(*pointer) instead of sizeof(type)
due to the type of the variable can change and one needs not
change the former (unlike the latter).

At the same time refactor the code to not use assignment in "if"
conditions.

This patch has no effect on runtime behavior.

Signed-off-by: Erick Archer <erick.archer@outlook.com>
Link: https://lore.kernel.org/r/AS8PR02MB7237FEA55FAC8A9453F2DA6F8BC42@AS8PR02MB7237.eurprd02.prod.outlook.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-06-09 14:38:43 -07:00

709 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* Based on the work of:
* Andree Borrmann Mats Sjövall
*/
/*
* Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver for Linux
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/mutex.h>
#include <linux/slab.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver");
MODULE_LICENSE("GPL");
struct db9_config {
int args[2];
unsigned int nargs;
};
#define DB9_MAX_PORTS 3
static struct db9_config db9_cfg[DB9_MAX_PORTS];
module_param_array_named(dev, db9_cfg[0].args, int, &db9_cfg[0].nargs, 0);
MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");
module_param_array_named(dev2, db9_cfg[1].args, int, &db9_cfg[1].nargs, 0);
MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");
module_param_array_named(dev3, db9_cfg[2].args, int, &db9_cfg[2].nargs, 0);
MODULE_PARM_DESC(dev3, "Describes third attached device (<parport#>,<type>)");
#define DB9_ARG_PARPORT 0
#define DB9_ARG_MODE 1
#define DB9_MULTI_STICK 0x01
#define DB9_MULTI2_STICK 0x02
#define DB9_GENESIS_PAD 0x03
#define DB9_GENESIS5_PAD 0x05
#define DB9_GENESIS6_PAD 0x06
#define DB9_SATURN_PAD 0x07
#define DB9_MULTI_0802 0x08
#define DB9_MULTI_0802_2 0x09
#define DB9_CD32_PAD 0x0A
#define DB9_SATURN_DPP 0x0B
#define DB9_SATURN_DPP_2 0x0C
#define DB9_MAX_PAD 0x0D
#define DB9_UP 0x01
#define DB9_DOWN 0x02
#define DB9_LEFT 0x04
#define DB9_RIGHT 0x08
#define DB9_FIRE1 0x10
#define DB9_FIRE2 0x20
#define DB9_FIRE3 0x40
#define DB9_FIRE4 0x80
#define DB9_NORMAL 0x0a
#define DB9_NOSELECT 0x08
#define DB9_GENESIS6_DELAY 14
#define DB9_REFRESH_TIME HZ/100
#define DB9_MAX_DEVICES 2
struct db9_mode_data {
const char *name;
const short *buttons;
int n_buttons;
int n_pads;
int n_axis;
int bidirectional;
int reverse;
};
struct db9 {
struct input_dev *dev[DB9_MAX_DEVICES];
struct timer_list timer;
struct pardevice *pd;
int mode;
int used;
int parportno;
struct mutex mutex;
char phys[DB9_MAX_DEVICES][32];
};
static struct db9 *db9_base[3];
static const short db9_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
static const short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
static const short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };
static const short db9_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_RZ, ABS_Z, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y };
static const struct db9_mode_data db9_modes[] = {
{ NULL, NULL, 0, 0, 0, 0, 0 },
{ "Multisystem joystick", db9_multi_btn, 1, 1, 2, 1, 1 },
{ "Multisystem joystick (2 fire)", db9_multi_btn, 2, 1, 2, 1, 1 },
{ "Genesis pad", db9_genesis_btn, 4, 1, 2, 1, 1 },
{ NULL, NULL, 0, 0, 0, 0, 0 },
{ "Genesis 5 pad", db9_genesis_btn, 6, 1, 2, 1, 1 },
{ "Genesis 6 pad", db9_genesis_btn, 8, 1, 2, 1, 1 },
{ "Saturn pad", db9_cd32_btn, 9, 6, 7, 0, 1 },
{ "Multisystem (0.8.0.2) joystick", db9_multi_btn, 1, 1, 2, 1, 1 },
{ "Multisystem (0.8.0.2-dual) joystick", db9_multi_btn, 1, 2, 2, 1, 1 },
{ "Amiga CD-32 pad", db9_cd32_btn, 7, 1, 2, 1, 1 },
{ "Saturn dpp", db9_cd32_btn, 9, 6, 7, 0, 0 },
{ "Saturn dpp dual", db9_cd32_btn, 9, 12, 7, 0, 0 },
};
/*
* Saturn controllers
*/
#define DB9_SATURN_DELAY 300
static const int db9_saturn_byte[] = { 1, 1, 1, 2, 2, 2, 2, 2, 1 };
static const unsigned char db9_saturn_mask[] = { 0x04, 0x01, 0x02, 0x40, 0x20, 0x10, 0x08, 0x80, 0x08 };
/*
* db9_saturn_write_sub() writes 2 bit data.
*/
static void db9_saturn_write_sub(struct parport *port, int type, unsigned char data, int powered, int pwr_sub)
{
unsigned char c;
switch (type) {
case 1: /* DPP1 */
c = 0x80 | 0x30 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | data;
parport_write_data(port, c);
break;
case 2: /* DPP2 */
c = 0x40 | data << 4 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | 0x03;
parport_write_data(port, c);
break;
case 0: /* DB9 */
c = ((((data & 2) ? 2 : 0) | ((data & 1) ? 4 : 0)) ^ 0x02) | !powered;
parport_write_control(port, c);
break;
}
}
/*
* gc_saturn_read_sub() reads 4 bit data.
*/
static unsigned char db9_saturn_read_sub(struct parport *port, int type)
{
unsigned char data;
if (type) {
/* DPP */
data = parport_read_status(port) ^ 0x80;
return (data & 0x80 ? 1 : 0) | (data & 0x40 ? 2 : 0)
| (data & 0x20 ? 4 : 0) | (data & 0x10 ? 8 : 0);
} else {
/* DB9 */
data = parport_read_data(port) & 0x0f;
return (data & 0x8 ? 1 : 0) | (data & 0x4 ? 2 : 0)
| (data & 0x2 ? 4 : 0) | (data & 0x1 ? 8 : 0);
}
}
/*
* db9_saturn_read_analog() sends clock and reads 8 bit data.
*/
static unsigned char db9_saturn_read_analog(struct parport *port, int type, int powered)
{
unsigned char data;
db9_saturn_write_sub(port, type, 0, powered, 0);
udelay(DB9_SATURN_DELAY);
data = db9_saturn_read_sub(port, type) << 4;
db9_saturn_write_sub(port, type, 2, powered, 0);
udelay(DB9_SATURN_DELAY);
data |= db9_saturn_read_sub(port, type);
return data;
}
/*
* db9_saturn_read_packet() reads whole saturn packet at connector
* and returns device identifier code.
*/
static unsigned char db9_saturn_read_packet(struct parport *port, unsigned char *data, int type, int powered)
{
int i, j;
unsigned char tmp;
db9_saturn_write_sub(port, type, 3, powered, 0);
data[0] = db9_saturn_read_sub(port, type);
switch (data[0] & 0x0f) {
case 0xf:
/* 1111 no pad */
return data[0] = 0xff;
case 0x4: case 0x4 | 0x8:
/* ?100 : digital controller */
db9_saturn_write_sub(port, type, 0, powered, 1);
data[2] = db9_saturn_read_sub(port, type) << 4;
db9_saturn_write_sub(port, type, 2, powered, 1);
data[1] = db9_saturn_read_sub(port, type) << 4;
db9_saturn_write_sub(port, type, 1, powered, 1);
data[1] |= db9_saturn_read_sub(port, type);
db9_saturn_write_sub(port, type, 3, powered, 1);
/* data[2] |= db9_saturn_read_sub(port, type); */
data[2] |= data[0];
return data[0] = 0x02;
case 0x1:
/* 0001 : analog controller or multitap */
db9_saturn_write_sub(port, type, 2, powered, 0);
udelay(DB9_SATURN_DELAY);
data[0] = db9_saturn_read_analog(port, type, powered);
if (data[0] != 0x41) {
/* read analog controller */
for (i = 0; i < (data[0] & 0x0f); i++)
data[i + 1] = db9_saturn_read_analog(port, type, powered);
db9_saturn_write_sub(port, type, 3, powered, 0);
return data[0];
} else {
/* read multitap */
if (db9_saturn_read_analog(port, type, powered) != 0x60)
return data[0] = 0xff;
for (i = 0; i < 60; i += 10) {
data[i] = db9_saturn_read_analog(port, type, powered);
if (data[i] != 0xff)
/* read each pad */
for (j = 0; j < (data[i] & 0x0f); j++)
data[i + j + 1] = db9_saturn_read_analog(port, type, powered);
}
db9_saturn_write_sub(port, type, 3, powered, 0);
return 0x41;
}
case 0x0:
/* 0000 : mouse */
db9_saturn_write_sub(port, type, 2, powered, 0);
udelay(DB9_SATURN_DELAY);
tmp = db9_saturn_read_analog(port, type, powered);
if (tmp == 0xff) {
for (i = 0; i < 3; i++)
data[i + 1] = db9_saturn_read_analog(port, type, powered);
db9_saturn_write_sub(port, type, 3, powered, 0);
return data[0] = 0xe3;
}
fallthrough;
default:
return data[0];
}
}
/*
* db9_saturn_report() analyzes packet and reports.
*/
static int db9_saturn_report(unsigned char id, unsigned char data[60], struct input_dev *devs[], int n, int max_pads)
{
struct input_dev *dev;
int tmp, i, j;
tmp = (id == 0x41) ? 60 : 10;
for (j = 0; j < tmp && n < max_pads; j += 10, n++) {
dev = devs[n];
switch (data[j]) {
case 0x16: /* multi controller (analog 4 axis) */
input_report_abs(dev, db9_abs[5], data[j + 6]);
fallthrough;
case 0x15: /* mission stick (analog 3 axis) */
input_report_abs(dev, db9_abs[3], data[j + 4]);
input_report_abs(dev, db9_abs[4], data[j + 5]);
fallthrough;
case 0x13: /* racing controller (analog 1 axis) */
input_report_abs(dev, db9_abs[2], data[j + 3]);
fallthrough;
case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
case 0x02: /* digital pad (digital 2 axis + buttons) */
input_report_abs(dev, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
input_report_abs(dev, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
for (i = 0; i < 9; i++)
input_report_key(dev, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
break;
case 0x19: /* mission stick x2 (analog 6 axis + buttons) */
input_report_abs(dev, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
input_report_abs(dev, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
for (i = 0; i < 9; i++)
input_report_key(dev, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
input_report_abs(dev, db9_abs[2], data[j + 3]);
input_report_abs(dev, db9_abs[3], data[j + 4]);
input_report_abs(dev, db9_abs[4], data[j + 5]);
/*
input_report_abs(dev, db9_abs[8], (data[j + 6] & 128 ? 0 : 1) - (data[j + 6] & 64 ? 0 : 1));
input_report_abs(dev, db9_abs[9], (data[j + 6] & 32 ? 0 : 1) - (data[j + 6] & 16 ? 0 : 1));
*/
input_report_abs(dev, db9_abs[6], data[j + 7]);
input_report_abs(dev, db9_abs[7], data[j + 8]);
input_report_abs(dev, db9_abs[5], data[j + 9]);
break;
case 0xd3: /* sankyo ff (analog 1 axis + stop btn) */
input_report_key(dev, BTN_A, data[j + 3] & 0x80);
input_report_abs(dev, db9_abs[2], data[j + 3] & 0x7f);
break;
case 0xe3: /* shuttle mouse (analog 2 axis + buttons. signed value) */
input_report_key(dev, BTN_START, data[j + 1] & 0x08);
input_report_key(dev, BTN_A, data[j + 1] & 0x04);
input_report_key(dev, BTN_C, data[j + 1] & 0x02);
input_report_key(dev, BTN_B, data[j + 1] & 0x01);
input_report_abs(dev, db9_abs[2], data[j + 2] ^ 0x80);
input_report_abs(dev, db9_abs[3], (0xff-(data[j + 3] ^ 0x80))+1); /* */
break;
case 0xff:
default: /* no pad */
input_report_abs(dev, db9_abs[0], 0);
input_report_abs(dev, db9_abs[1], 0);
for (i = 0; i < 9; i++)
input_report_key(dev, db9_cd32_btn[i], 0);
break;
}
}
return n;
}
static int db9_saturn(int mode, struct parport *port, struct input_dev *devs[])
{
unsigned char id, data[60];
int type, n, max_pads;
int tmp, i;
switch (mode) {
case DB9_SATURN_PAD:
type = 0;
n = 1;
break;
case DB9_SATURN_DPP:
type = 1;
n = 1;
break;
case DB9_SATURN_DPP_2:
type = 1;
n = 2;
break;
default:
return -1;
}
max_pads = min(db9_modes[mode].n_pads, DB9_MAX_DEVICES);
for (tmp = 0, i = 0; i < n; i++) {
id = db9_saturn_read_packet(port, data, type + i, 1);
tmp = db9_saturn_report(id, data, devs, tmp, max_pads);
}
return 0;
}
static void db9_timer(struct timer_list *t)
{
struct db9 *db9 = from_timer(db9, t, timer);
struct parport *port = db9->pd->port;
struct input_dev *dev = db9->dev[0];
struct input_dev *dev2 = db9->dev[1];
int data, i;
switch (db9->mode) {
case DB9_MULTI_0802_2:
data = parport_read_data(port) >> 3;
input_report_abs(dev2, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev2, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev2, BTN_TRIGGER, ~data & DB9_FIRE1);
fallthrough;
case DB9_MULTI_0802:
data = parport_read_status(port) >> 3;
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_TRIGGER, data & DB9_FIRE1);
break;
case DB9_MULTI_STICK:
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
break;
case DB9_MULTI2_STICK:
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
input_report_key(dev, BTN_THUMB, ~data & DB9_FIRE2);
break;
case DB9_GENESIS_PAD:
parport_write_control(port, DB9_NOSELECT);
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
input_report_key(dev, BTN_C, ~data & DB9_FIRE2);
parport_write_control(port, DB9_NORMAL);
data = parport_read_data(port);
input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
break;
case DB9_GENESIS5_PAD:
parport_write_control(port, DB9_NOSELECT);
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
input_report_key(dev, BTN_C, ~data & DB9_FIRE2);
parport_write_control(port, DB9_NORMAL);
data = parport_read_data(port);
input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
input_report_key(dev, BTN_X, ~data & DB9_FIRE2);
input_report_key(dev, BTN_Y, ~data & DB9_LEFT);
input_report_key(dev, BTN_START, ~data & DB9_RIGHT);
break;
case DB9_GENESIS6_PAD:
parport_write_control(port, DB9_NOSELECT); /* 1 */
udelay(DB9_GENESIS6_DELAY);
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
input_report_key(dev, BTN_C, ~data & DB9_FIRE2);
parport_write_control(port, DB9_NORMAL);
udelay(DB9_GENESIS6_DELAY);
data = parport_read_data(port);
input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
parport_write_control(port, DB9_NOSELECT); /* 2 */
udelay(DB9_GENESIS6_DELAY);
parport_write_control(port, DB9_NORMAL);
udelay(DB9_GENESIS6_DELAY);
parport_write_control(port, DB9_NOSELECT); /* 3 */
udelay(DB9_GENESIS6_DELAY);
data=parport_read_data(port);
input_report_key(dev, BTN_X, ~data & DB9_LEFT);
input_report_key(dev, BTN_Y, ~data & DB9_DOWN);
input_report_key(dev, BTN_Z, ~data & DB9_UP);
input_report_key(dev, BTN_MODE, ~data & DB9_RIGHT);
parport_write_control(port, DB9_NORMAL);
udelay(DB9_GENESIS6_DELAY);
parport_write_control(port, DB9_NOSELECT); /* 4 */
udelay(DB9_GENESIS6_DELAY);
parport_write_control(port, DB9_NORMAL);
break;
case DB9_SATURN_PAD:
case DB9_SATURN_DPP:
case DB9_SATURN_DPP_2:
db9_saturn(db9->mode, port, db9->dev);
break;
case DB9_CD32_PAD:
data = parport_read_data(port);
input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));
parport_write_control(port, 0x0a);
for (i = 0; i < 7; i++) {
data = parport_read_data(port);
parport_write_control(port, 0x02);
parport_write_control(port, 0x0a);
input_report_key(dev, db9_cd32_btn[i], ~data & DB9_FIRE2);
}
parport_write_control(port, 0x00);
break;
}
input_sync(dev);
mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
}
static int db9_open(struct input_dev *dev)
{
struct db9 *db9 = input_get_drvdata(dev);
struct parport *port = db9->pd->port;
int err;
err = mutex_lock_interruptible(&db9->mutex);
if (err)
return err;
if (!db9->used++) {
parport_claim(db9->pd);
parport_write_data(port, 0xff);
if (db9_modes[db9->mode].reverse) {
parport_data_reverse(port);
parport_write_control(port, DB9_NORMAL);
}
mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
}
mutex_unlock(&db9->mutex);
return 0;
}
static void db9_close(struct input_dev *dev)
{
struct db9 *db9 = input_get_drvdata(dev);
struct parport *port = db9->pd->port;
mutex_lock(&db9->mutex);
if (!--db9->used) {
del_timer_sync(&db9->timer);
parport_write_control(port, 0x00);
parport_data_forward(port);
parport_release(db9->pd);
}
mutex_unlock(&db9->mutex);
}
static void db9_attach(struct parport *pp)
{
struct db9 *db9;
const struct db9_mode_data *db9_mode;
struct pardevice *pd;
struct input_dev *input_dev;
int i, j, port_idx;
int mode;
struct pardev_cb db9_parport_cb;
for (port_idx = 0; port_idx < DB9_MAX_PORTS; port_idx++) {
if (db9_cfg[port_idx].nargs == 0 ||
db9_cfg[port_idx].args[DB9_ARG_PARPORT] < 0)
continue;
if (db9_cfg[port_idx].args[DB9_ARG_PARPORT] == pp->number)
break;
}
if (port_idx == DB9_MAX_PORTS) {
pr_debug("Not using parport%d.\n", pp->number);
return;
}
mode = db9_cfg[port_idx].args[DB9_ARG_MODE];
if (mode < 1 || mode >= DB9_MAX_PAD || !db9_modes[mode].n_buttons) {
printk(KERN_ERR "db9.c: Bad device type %d\n", mode);
return;
}
db9_mode = &db9_modes[mode];
if (db9_mode->bidirectional && !(pp->modes & PARPORT_MODE_TRISTATE)) {
printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
return;
}
memset(&db9_parport_cb, 0, sizeof(db9_parport_cb));
db9_parport_cb.flags = PARPORT_FLAG_EXCL;
pd = parport_register_dev_model(pp, "db9", &db9_parport_cb, port_idx);
if (!pd) {
printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
return;
}
db9 = kzalloc(sizeof(*db9), GFP_KERNEL);
if (!db9)
goto err_unreg_pardev;
mutex_init(&db9->mutex);
db9->pd = pd;
db9->mode = mode;
db9->parportno = pp->number;
timer_setup(&db9->timer, db9_timer, 0);
for (i = 0; i < (min(db9_mode->n_pads, DB9_MAX_DEVICES)); i++) {
db9->dev[i] = input_dev = input_allocate_device();
if (!input_dev) {
printk(KERN_ERR "db9.c: Not enough memory for input device\n");
goto err_unreg_devs;
}
snprintf(db9->phys[i], sizeof(db9->phys[i]),
"%s/input%d", db9->pd->port->name, i);
input_dev->name = db9_mode->name;
input_dev->phys = db9->phys[i];
input_dev->id.bustype = BUS_PARPORT;
input_dev->id.vendor = 0x0002;
input_dev->id.product = mode;
input_dev->id.version = 0x0100;
input_set_drvdata(input_dev, db9);
input_dev->open = db9_open;
input_dev->close = db9_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (j = 0; j < db9_mode->n_buttons; j++)
set_bit(db9_mode->buttons[j], input_dev->keybit);
for (j = 0; j < db9_mode->n_axis; j++) {
if (j < 2)
input_set_abs_params(input_dev, db9_abs[j], -1, 1, 0, 0);
else
input_set_abs_params(input_dev, db9_abs[j], 1, 255, 0, 0);
}
if (input_register_device(input_dev))
goto err_free_dev;
}
db9_base[port_idx] = db9;
return;
err_free_dev:
input_free_device(db9->dev[i]);
err_unreg_devs:
while (--i >= 0)
input_unregister_device(db9->dev[i]);
kfree(db9);
err_unreg_pardev:
parport_unregister_device(pd);
}
static void db9_detach(struct parport *port)
{
int i;
struct db9 *db9;
for (i = 0; i < DB9_MAX_PORTS; i++) {
if (db9_base[i] && db9_base[i]->parportno == port->number)
break;
}
if (i == DB9_MAX_PORTS)
return;
db9 = db9_base[i];
db9_base[i] = NULL;
for (i = 0; i < min(db9_modes[db9->mode].n_pads, DB9_MAX_DEVICES); i++)
input_unregister_device(db9->dev[i]);
parport_unregister_device(db9->pd);
kfree(db9);
}
static struct parport_driver db9_parport_driver = {
.name = "db9",
.match_port = db9_attach,
.detach = db9_detach,
.devmodel = true,
};
static int __init db9_init(void)
{
int i;
int have_dev = 0;
for (i = 0; i < DB9_MAX_PORTS; i++) {
if (db9_cfg[i].nargs == 0 || db9_cfg[i].args[DB9_ARG_PARPORT] < 0)
continue;
if (db9_cfg[i].nargs < 2) {
printk(KERN_ERR "db9.c: Device type must be specified.\n");
return -EINVAL;
}
have_dev = 1;
}
if (!have_dev)
return -ENODEV;
return parport_register_driver(&db9_parport_driver);
}
static void __exit db9_exit(void)
{
parport_unregister_driver(&db9_parport_driver);
}
module_init(db9_init);
module_exit(db9_exit);
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