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linux_dsm_epyc7002/drivers/input/joystick/gf2k.c
Roel Kluin abf2a117c6 Input: gf2k - fix &&/|| confusion in gf2k_connect() 
This always evaluates to true.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-01-01 18:45:52 -08:00

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/*
* Copyright (c) 1998-2001 Vojtech Pavlik
*/
/*
* Genius Flight 2000 joystick driver for Linux
*/
/*
* 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
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/jiffies.h>
#define DRIVER_DESC "Genius Flight 2000 joystick driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
#define GF2K_START 400 /* The time we wait for the first bit [400 us] */
#define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
#define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
#define GF2K_LENGTH 80 /* Max number of triplets in a packet */
/*
* Genius joystick ids ...
*/
#define GF2K_ID_G09 1
#define GF2K_ID_F30D 2
#define GF2K_ID_F30 3
#define GF2K_ID_F31D 4
#define GF2K_ID_F305 5
#define GF2K_ID_F23P 6
#define GF2K_ID_F31 7
#define GF2K_ID_MAX 7
static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
"Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
static short gf2k_seq_reset[] = { 240, 340, 0 };
static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
struct gf2k {
struct gameport *gameport;
struct input_dev *dev;
int reads;
int bads;
unsigned char id;
unsigned char length;
char phys[32];
};
/*
* gf2k_read_packet() reads a Genius Flight2000 packet.
*/
static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
{
unsigned char u, v;
int i;
unsigned int t, p;
unsigned long flags;
t = gameport_time(gameport, GF2K_START);
p = gameport_time(gameport, GF2K_STROBE);
i = 0;
local_irq_save(flags);
gameport_trigger(gameport);
v = gameport_read(gameport);
while (t > 0 && i < length) {
t--; u = v;
v = gameport_read(gameport);
if (v & ~u & 0x10) {
data[i++] = v >> 5;
t = p;
}
}
local_irq_restore(flags);
return i;
}
/*
* gf2k_trigger_seq() initializes a Genius Flight2000 joystick
* into digital mode.
*/
static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
{
unsigned long flags;
int i, t;
local_irq_save(flags);
i = 0;
do {
gameport_trigger(gameport);
t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
while ((gameport_read(gameport) & 1) && t) t--;
udelay(seq[i]);
} while (seq[++i]);
gameport_trigger(gameport);
local_irq_restore(flags);
}
/*
* js_sw_get_bits() composes bits from the triplet buffer into a __u64.
* Parameter 'pos' is bit number inside packet where to start at, 'num' is number
* of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
* is number of bits per triplet.
*/
#define GB(p,n,s) gf2k_get_bits(data, p, n, s)
static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
{
__u64 data = 0;
int i;
for (i = 0; i < num / 3 + 2; i++)
data |= buf[pos / 3 + i] << (i * 3);
data >>= pos % 3;
data &= (1 << num) - 1;
data <<= shift;
return data;
}
static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
{
struct input_dev *dev = gf2k->dev;
int i, t;
for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
t = GB(40,4,0);
for (i = 0; i < gf2k_hats[gf2k->id]; i++)
input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
for (i = 0; i < gf2k_joys[gf2k->id]; i++)
input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
for (i = 0; i < gf2k_pads[gf2k->id]; i++)
input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
input_sync(dev);
}
/*
* gf2k_poll() reads and analyzes Genius joystick data.
*/
static void gf2k_poll(struct gameport *gameport)
{
struct gf2k *gf2k = gameport_get_drvdata(gameport);
unsigned char data[GF2K_LENGTH];
gf2k->reads++;
if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
gf2k->bads++;
else
gf2k_read(gf2k, data);
}
static int gf2k_open(struct input_dev *dev)
{
struct gf2k *gf2k = input_get_drvdata(dev);
gameport_start_polling(gf2k->gameport);
return 0;
}
static void gf2k_close(struct input_dev *dev)
{
struct gf2k *gf2k = input_get_drvdata(dev);
gameport_stop_polling(gf2k->gameport);
}
/*
* gf2k_connect() probes for Genius id joysticks.
*/
static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
{
struct gf2k *gf2k;
struct input_dev *input_dev;
unsigned char data[GF2K_LENGTH];
int i, err;
gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
input_dev = input_allocate_device();
if (!gf2k || !input_dev) {
err = -ENOMEM;
goto fail1;
}
gf2k->gameport = gameport;
gf2k->dev = input_dev;
gameport_set_drvdata(gameport, gf2k);
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
if (err)
goto fail1;
gf2k_trigger_seq(gameport, gf2k_seq_reset);
msleep(GF2K_TIMEOUT);
gf2k_trigger_seq(gameport, gf2k_seq_digital);
msleep(GF2K_TIMEOUT);
if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
err = -ENODEV;
goto fail2;
}
if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
err = -ENODEV;
goto fail2;
}
#ifdef RESET_WORKS
if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
(gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
err = -ENODEV;
goto fail2;
}
#else
gf2k->id = 6;
#endif
if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
err = -ENODEV;
goto fail2;
}
gameport_set_poll_handler(gameport, gf2k_poll);
gameport_set_poll_interval(gameport, 20);
snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
gf2k->length = gf2k_lens[gf2k->id];
input_dev->name = gf2k_names[gf2k->id];
input_dev->phys = gf2k->phys;
input_dev->id.bustype = BUS_GAMEPORT;
input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
input_dev->id.product = gf2k->id;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &gameport->dev;
input_set_drvdata(input_dev, gf2k);
input_dev->open = gf2k_open;
input_dev->close = gf2k_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (i = 0; i < gf2k_axes[gf2k->id]; i++)
set_bit(gf2k_abs[i], input_dev->absbit);
for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
set_bit(ABS_HAT0X + i, input_dev->absbit);
input_dev->absmin[ABS_HAT0X + i] = -1;
input_dev->absmax[ABS_HAT0X + i] = 1;
}
for (i = 0; i < gf2k_joys[gf2k->id]; i++)
set_bit(gf2k_btn_joy[i], input_dev->keybit);
for (i = 0; i < gf2k_pads[gf2k->id]; i++)
set_bit(gf2k_btn_pad[i], input_dev->keybit);
gf2k_read_packet(gameport, gf2k->length, data);
gf2k_read(gf2k, data);
for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
input_dev->absmax[gf2k_abs[i]] = (i < 2) ? input_dev->abs[gf2k_abs[i]] * 2 - 32 :
input_dev->abs[gf2k_abs[0]] + input_dev->abs[gf2k_abs[1]] - 32;
input_dev->absmin[gf2k_abs[i]] = 32;
input_dev->absfuzz[gf2k_abs[i]] = 8;
input_dev->absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
}
err = input_register_device(gf2k->dev);
if (err)
goto fail2;
return 0;
fail2: gameport_close(gameport);
fail1: gameport_set_drvdata(gameport, NULL);
input_free_device(input_dev);
kfree(gf2k);
return err;
}
static void gf2k_disconnect(struct gameport *gameport)
{
struct gf2k *gf2k = gameport_get_drvdata(gameport);
input_unregister_device(gf2k->dev);
gameport_close(gameport);
gameport_set_drvdata(gameport, NULL);
kfree(gf2k);
}
static struct gameport_driver gf2k_drv = {
.driver = {
.name = "gf2k",
},
.description = DRIVER_DESC,
.connect = gf2k_connect,
.disconnect = gf2k_disconnect,
};
static int __init gf2k_init(void)
{
return gameport_register_driver(&gf2k_drv);
}
static void __exit gf2k_exit(void)
{
gameport_unregister_driver(&gf2k_drv);
}
module_init(gf2k_init);
module_exit(gf2k_exit);
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