drivers/input/gameport/ns558.c - linux - Git at Google

 /*
  *  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
  */

 #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;
 }

 #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;
 }

 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;
 }

 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);
 }

 module_init(ns558_init);
 module_exit(ns558_exit);
	/*
	* 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
	*/

	#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;
	}

	#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;
	}

	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;
	}

	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);
	}

	module_init(ns558_init);
	module_exit(ns558_exit);