cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/joystick/interact.c

/*
 *  Copyright (c) 2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *      Toby Deshane
 */

/*
 * InterAct digital gamepad/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/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	"InterAct digital joystick driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");


#define INTERACT_MAX_START	600	
/* 400 us */

#define INTERACT_MAX_STROBE	60	
/* 40 us */

#define INTERACT_MAX_LENGTH	32	
/* 32 bits */


#define INTERACT_TYPE_HHFX	0	
/* HammerHead/FX */

#define INTERACT_TYPE_PP8D	1	
/* ProPad 8 */


struct interact {
	
struct gameport *gameport;
	
struct input_dev *dev;
	
int bads;
	
int reads;
	
unsigned char type;
	
unsigned char length;
	
char phys[32];
};


static short interact_abs_hhfx[] =
	{ ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };

static short interact_abs_pp8d[] =
	{ ABS_X, ABS_Y, -1 };


static short interact_btn_hhfx[] =
	{ BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL, BTN_TL2, BTN_TR2, BTN_MODE, BTN_SELECT, -1 };

static short interact_btn_pp8d[] =
	{ BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };


struct interact_type {
	
int id;
	
short *abs;
	
short *btn;
	
char *name;
	
unsigned char length;
	
unsigned char b8;
};


static struct interact_type interact_type[] = {
	{ 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
	{ 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
	{ 0 }};

/*
 * interact_read_packet() reads and InterAct joystick data.
 */


static int interact_read_packet(struct gameport *gameport, int length, u32 *data) { unsigned long flags; unsigned char u, v; unsigned int t, s; int i; i = 0; data[0] = data[1] = data[2] = 0; t = gameport_time(gameport, INTERACT_MAX_START); s = gameport_time(gameport, INTERACT_MAX_STROBE); 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 & 0x40) { data[0] = (data[0] << 1) | ((v >> 4) & 1); data[1] = (data[1] << 1) | ((v >> 5) & 1); data[2] = (data[2] << 1) | ((v >> 7) & 1); i++; t = s; } } local_irq_restore(flags); return i; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21599.08%133.33%
Ingo Molnar20.92%266.67%
Total217100.00%3100.00%

/* * interact_poll() reads and analyzes InterAct joystick data. */
static void interact_poll(struct gameport *gameport) { struct interact *interact = gameport_get_drvdata(gameport); struct input_dev *dev = interact->dev; u32 data[3]; int i; interact->reads++; if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) { interact->bads++; } else { for (i = 0; i < 3; i++) data[i] <<= INTERACT_MAX_LENGTH - interact->length; switch (interact->type) { case INTERACT_TYPE_HHFX: for (i = 0; i < 4; i++) input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff); for (i = 0; i < 2; i++) input_report_abs(dev, ABS_HAT0Y - i, ((data[1] >> ((i << 1) + 17)) & 1) - ((data[1] >> ((i << 1) + 16)) & 1)); for (i = 0; i < 8; i++) input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1); for (i = 0; i < 4; i++) input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1); break; case INTERACT_TYPE_PP8D: for (i = 0; i < 2; i++) input_report_abs(dev, interact_abs_pp8d[i], ((data[0] >> ((i << 1) + 20)) & 1) - ((data[0] >> ((i << 1) + 21)) & 1)); for (i = 0; i < 8; i++) input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1); break; } } input_sync(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)39196.07%125.00%
Dmitry Torokhov92.21%125.00%
Vojtech Pavlik71.72%250.00%
Total407100.00%4100.00%

/* * interact_open() is a callback from the input open routine. */
static int interact_open(struct input_dev *dev) { struct interact *interact = input_get_drvdata(dev); gameport_start_polling(interact->gameport); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2683.87%133.33%
Dmitry Torokhov516.13%266.67%
Total31100.00%3100.00%

/* * interact_close() is a callback from the input close routine. */
static void interact_close(struct input_dev *dev) { struct interact *interact = input_get_drvdata(dev); gameport_stop_polling(interact->gameport); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2382.14%133.33%
Dmitry Torokhov517.86%266.67%
Total28100.00%3100.00%

/* * interact_connect() probes for InterAct joysticks. */
static int interact_connect(struct gameport *gameport, struct gameport_driver *drv) { struct interact *interact; struct input_dev *input_dev; __u32 data[3]; int i, t; int err; interact = kzalloc(sizeof(struct interact), GFP_KERNEL); input_dev = input_allocate_device(); if (!interact || !input_dev) { err = -ENOMEM; goto fail1; } interact->gameport = gameport; interact->dev = input_dev; gameport_set_drvdata(gameport, interact); err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); if (err) goto fail1; i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data); if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) { err = -ENODEV; goto fail2; } for (i = 0; interact_type[i].length; i++) if (interact_type[i].id == (data[2] >> 16)) break; if (!interact_type[i].length) { printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n", gameport->phys, i, data[0], data[1], data[2]); err = -ENODEV; goto fail2; } gameport_set_poll_handler(gameport, interact_poll); gameport_set_poll_interval(gameport, 20); snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys); interact->type = i; interact->length = interact_type[i].length; input_dev->name = interact_type[i].name; input_dev->phys = interact->phys; input_dev->id.bustype = BUS_GAMEPORT; input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT; input_dev->id.product = interact_type[i].id; input_dev->id.version = 0x0100; input_dev->dev.parent = &gameport->dev; input_set_drvdata(input_dev, interact); input_dev->open = interact_open; input_dev->close = interact_close; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) { if (i < interact_type[interact->type].b8) input_set_abs_params(input_dev, t, 0, 255, 0, 0); else input_set_abs_params(input_dev, t, -1, 1, 0, 0); } for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++) __set_bit(t, input_dev->keybit); err = input_register_device(interact->dev); if (err) goto fail2; return 0; fail2: gameport_close(gameport); fail1: gameport_set_drvdata(gameport, NULL); input_free_device(input_dev); kfree(interact); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)34962.54%16.67%
Dmitry Torokhov15227.24%960.00%
Vojtech Pavlik335.91%213.33%
Daniel Mack213.76%16.67%
Jiri Slaby20.36%16.67%
Pekka J Enberg10.18%16.67%
Total558100.00%15100.00%


static void interact_disconnect(struct gameport *gameport) { struct interact *interact = gameport_get_drvdata(gameport); input_unregister_device(interact->dev); gameport_close(gameport); gameport_set_drvdata(gameport, NULL); kfree(interact); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3577.78%150.00%
Dmitry Torokhov1022.22%150.00%
Total45100.00%2100.00%

static struct gameport_driver interact_drv = { .driver = { .name = "interact", }, .description = DRIVER_DESC, .connect = interact_connect, .disconnect = interact_disconnect, }; module_gameport_driver(interact_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)129080.88%14.17%
Dmitry Torokhov20512.85%937.50%
Vojtech Pavlik674.20%520.83%
Daniel Mack211.32%14.17%
Tim Schmielau30.19%14.17%
Jiri Slaby20.13%14.17%
Axel Lin20.13%14.17%
Ingo Molnar20.13%28.33%
Adrian Bunk10.06%14.17%
Pekka J Enberg10.06%14.17%
Linus Torvalds10.06%14.17%
Total1595100.00%24100.00%
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