cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/gameport/ns558.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *  Copyright (c) 1999 Brian Gerst
 */

/*
 * NS558 based standard IBM game port 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 <asm/io.h>

#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gameport.h>
#include <linux/slab.h>
#include <linux/pnp.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
MODULE_LICENSE("GPL");


static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
				    0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };


struct ns558 {
	
int type;
	
int io;
	
int size;
	
struct pnp_dev *dev;
	
struct gameport *gameport;
	
struct list_head node;
};

static LIST_HEAD(ns558_list);

/*
 * ns558_isa_probe() tries to find an isa gameport at the
 * specified address, and also checks for mirrors.
 * A joystick must be attached for this to work.
 */


static int ns558_isa_probe(int io) { int i, j, b; unsigned char c, u, v; struct ns558 *ns558; struct gameport *port; /* * No one should be using this address. */ if (!request_region(io, 1, "ns558-isa")) return -EBUSY; /* * We must not be able to write arbitrary values to the port. * The lower two axis bits must be 1 after a write. */ c = inb(io); outb(~c & ~3, io); if (~(u = v = inb(io)) & 3) { outb(c, io); release_region(io, 1); return -ENODEV; } /* * After a trigger, there must be at least some bits changing. */ for (i = 0; i < 1000; i++) v &= inb(io); if (u == v) { outb(c, io); release_region(io, 1); return -ENODEV; } msleep(3); /* * After some time (4ms) the axes shouldn't change anymore. */ u = inb(io); for (i = 0; i < 1000; i++) if ((u ^ inb(io)) & 0xf) { outb(c, io); release_region(io, 1); return -ENODEV; } /* * And now find the number of mirrors of the port. */ for (i = 1; i < 5; i++) { release_region(io & (-1 << (i - 1)), (1 << (i - 1))); if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) break; /* Don't disturb anyone */ outb(0xff, io & (-1 << i)); for (j = b = 0; j < 1000; j++) if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++; msleep(3); if (b > 300) { /* We allow 30% difference */ release_region(io & (-1 << i), (1 << i)); break; } } i--; if (i != 4) { if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) return -EBUSY; } ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); port = gameport_allocate_port(); if (!ns558 || !port) { printk(KERN_ERR "ns558: Memory allocation failed.\n"); release_region(io & (-1 << i), (1 << i)); kfree(ns558); gameport_free_port(port); return -ENOMEM; } ns558->io = io; ns558->size = 1 << i; ns558->gameport = port; port->io = io; gameport_set_name(port, "NS558 ISA Gameport"); gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i)); gameport_register_port(port); list_add(&ns558->node, &ns558_list); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)31256.52%325.00%
Dmitry Torokhov11120.11%216.67%
Marcel Sebek8615.58%18.33%
Vojtech Pavlik376.70%325.00%
Linus Torvalds30.54%18.33%
Greg Kroah-Hartman20.36%18.33%
Pekka J Enberg10.18%18.33%
Total552100.00%12100.00%

#ifdef CONFIG_PNP static const struct pnp_device_id pnp_devids[] = { { .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */ { .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */ { .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */ { .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */ { .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */ { .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */ { .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */ { .id = "CSC0001", .driver_data = 0 }, /* CS4232 */ { .id = "CSC000f", .driver_data = 0 }, /* CS4236 */ { .id = "CSC0101", .driver_data = 0 }, /* CS4327 */ { .id = "CTL7001", .driver_data = 0 }, /* SB16 */ { .id = "CTL7002", .driver_data = 0 }, /* AWE64 */ { .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */ { .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */ { .id = "ESS0001", .driver_data = 0 }, /* ES1869 */ { .id = "ESS0005", .driver_data = 0 }, /* ES1878 */ { .id = "ESS6880", .driver_data = 0 }, /* ES688 */ { .id = "IBM0012", .driver_data = 0 }, /* CS4232 */ { .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */ { .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */ { .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */ { .id = "PNPb02f", .driver_data = 0 }, /* Generic */ { .id = "", }, }; MODULE_DEVICE_TABLE(pnp, pnp_devids);
static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did) { int ioport, iolen; struct ns558 *ns558; struct gameport *port; if (!pnp_port_valid(dev, 0)) { printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n"); return -ENODEV; } ioport = pnp_port_start(dev, 0); iolen = pnp_port_len(dev, 0); if (!request_region(ioport, iolen, "ns558-pnp")) return -EBUSY; ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); port = gameport_allocate_port(); if (!ns558 || !port) { printk(KERN_ERR "ns558: Memory allocation failed\n"); kfree(ns558); gameport_free_port(port); return -ENOMEM; } ns558->io = ioport; ns558->size = iolen; ns558->dev = dev; ns558->gameport = port; gameport_set_name(port, "NS558 PnP Gameport"); gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev)); port->dev.parent = &dev->dev; port->io = ioport; gameport_register_port(port); list_add_tail(&ns558->node, &ns558_list); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9443.12%325.00%
Dmitry Torokhov5223.85%18.33%
Vojtech Pavlik3616.51%216.67%
Adam Belay2611.93%216.67%
Kay Sievers41.83%18.33%
Jaroslav Kysela41.83%18.33%
Linus Torvalds10.46%18.33%
Pekka J Enberg10.46%18.33%
Total218100.00%12100.00%

static struct pnp_driver ns558_pnp_driver = { .name = "ns558", .id_table = pnp_devids, .probe = ns558_pnp_probe, }; #else static struct pnp_driver ns558_pnp_driver; #endif
static int __init ns558_init(void) { int i = 0; int error; error = pnp_register_driver(&ns558_pnp_driver); if (error && error != -ENODEV) /* should be ENOSYS really */ return error; /* * Probe ISA ports after PnP, so that PnP ports that are already * enabled get detected as PnP. This may be suboptimal in multi-device * configurations, but saves hassle with simple setups. */ while (ns558_isa_portlist[i]) ns558_isa_probe(ns558_isa_portlist[i++]); return list_empty(&ns558_list) && error ? -ENODEV : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3449.28%550.00%
Björn Helgaas1927.54%110.00%
Vojtech Pavlik1521.74%330.00%
Adrian Bunk11.45%110.00%
Total69100.00%10100.00%


static void __exit ns558_exit(void) { struct ns558 *ns558, *safe; list_for_each_entry_safe(ns558, safe, &ns558_list, node) { gameport_unregister_port(ns558->gameport); release_region(ns558->io & ~(ns558->size - 1), ns558->size); kfree(ns558); } pnp_unregister_driver(&ns558_pnp_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2943.28%222.22%
Vojtech Pavlik1420.90%222.22%
Dmitry Torokhov710.45%111.11%
Adam Belay68.96%111.11%
Alexander Nyberg68.96%111.11%
Marcel Sebek45.97%111.11%
Adrian Bunk11.49%111.11%
Total67100.00%9100.00%

module_init(ns558_init); module_exit(ns558_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)58142.25%517.86%
Adam Belay26819.49%27.14%
Dmitry Torokhov17812.95%27.14%
Vojtech Pavlik16111.71%517.86%
Marcel Sebek906.55%27.14%
Linus Torvalds533.85%310.71%
Björn Helgaas191.38%13.57%
Alexander Nyberg60.44%13.57%
Greg Kroah-Hartman50.36%13.57%
Jaroslav Kysela40.29%13.57%
Kay Sievers40.29%13.57%
Adrian Bunk30.22%27.14%
Pekka J Enberg20.15%13.57%
Márton Németh10.07%13.57%
Total1375100.00%28100.00%
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