cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/joystick/amijoy.c

/*
 *  Copyright (c) 1998-2001 Vojtech Pavlik
 */

/*
 * Driver for Amiga joysticks for Linux/m68k
 */

/*
 * 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/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>

#include <asm/amigahw.h>
#include <asm/amigaints.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Driver for Amiga joysticks");
MODULE_LICENSE("GPL");


static int amijoy[2] = { 0, 1 };
module_param_array_named(map, amijoy, uint, NULL, 0);
MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");


static int amijoy_used;
static DEFINE_MUTEX(amijoy_mutex);

static struct input_dev *amijoy_dev[2];

static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };


static irqreturn_t amijoy_interrupt(int irq, void *dummy) { int i, data = 0, button = 0; for (i = 0; i < 2; i++) if (amijoy[i]) { switch (i) { case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break; case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break; } input_report_key(amijoy_dev[i], BTN_TRIGGER, button); input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1)); data = ~(data ^ (data << 1)); input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1)); input_sync(amijoy_dev[i]); } return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11860.20%116.67%
Vojtech Pavlik6432.65%233.33%
Dmitry Torokhov84.08%116.67%
Geert Uytterhoeven42.04%116.67%
Al Viro21.02%116.67%
Total196100.00%6100.00%


static int amijoy_open(struct input_dev *dev) { int err; err = mutex_lock_interruptible(&amijoy_mutex); if (err) return err; if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); err = -EBUSY; goto out; } amijoy_used++; out: mutex_unlock(&amijoy_mutex); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik4253.16%120.00%
Dmitry Torokhov2835.44%120.00%
Ingo Molnar45.06%120.00%
Linus Torvalds (pre-git)33.80%120.00%
Geert Uytterhoeven22.53%120.00%
Total79100.00%5100.00%


static void amijoy_close(struct input_dev *dev) { mutex_lock(&amijoy_mutex); if (!--amijoy_used) free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); mutex_unlock(&amijoy_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik2363.89%133.33%
Dmitry Torokhov925.00%133.33%
Ingo Molnar411.11%133.33%
Total36100.00%3100.00%


static int __init amijoy_init(void) { int i, j; int err; if (!MACH_IS_AMIGA) return -ENODEV; for (i = 0; i < 2; i++) { if (!amijoy[i]) continue; amijoy_dev[i] = input_allocate_device(); if (!amijoy_dev[i]) { err = -ENOMEM; goto fail; } if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) { input_free_device(amijoy_dev[i]); err = -EBUSY; goto fail; } amijoy_dev[i]->name = "Amiga joystick"; amijoy_dev[i]->phys = amijoy_phys[i]; amijoy_dev[i]->id.bustype = BUS_AMIGA; amijoy_dev[i]->id.vendor = 0x0001; amijoy_dev[i]->id.product = 0x0003; amijoy_dev[i]->id.version = 0x0100; amijoy_dev[i]->open = amijoy_open; amijoy_dev[i]->close = amijoy_close; amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y); amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); for (j = 0; j < 2; j++) { input_set_abs_params(amijoy_dev[i], ABS_X + j, -1, 1, 0, 0); } err = input_register_device(amijoy_dev[i]); if (err) { input_free_device(amijoy_dev[i]); goto fail; } } return 0; fail: while (--i >= 0) if (amijoy[i]) { input_unregister_device(amijoy_dev[i]); release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik17045.82%19.09%
Dmitry Torokhov16043.13%218.18%
Geert Uytterhoeven112.96%218.18%
Daniel Mack102.70%218.18%
Jiri Slaby82.16%19.09%
Linus Torvalds71.89%19.09%
Linus Torvalds (pre-git)51.35%218.18%
Total371100.00%11100.00%


static void __exit amijoy_exit(void) { int i; for (i = 0; i < 2; i++) if (amijoy[i]) { input_unregister_device(amijoy_dev[i]); release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); } }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik4785.45%125.00%
Linus Torvalds59.09%125.00%
Dmitry Torokhov23.64%125.00%
Geert Uytterhoeven11.82%125.00%
Total55100.00%4100.00%

module_init(amijoy_init); module_exit(amijoy_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik37743.79%29.09%
Dmitry Torokhov23126.83%522.73%
Linus Torvalds (pre-git)17720.56%29.09%
Geert Uytterhoeven242.79%418.18%
Linus Torvalds171.97%29.09%
Ingo Molnar131.51%14.55%
Daniel Mack101.16%29.09%
Jiri Slaby80.93%14.55%
Al Viro20.23%14.55%
Rusty Russell10.12%14.55%
Adrian Bunk10.12%14.55%
Total861100.00%22100.00%
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