Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 1773 insertions, 0 deletions

diff --git a/drivers/input/gameport/Kconfig b/drivers/input/gameport/Kconfig
new file mode 100644
index 000000000..5a2c2fb32
--- /dev/null
+++ b/drivers/input/gameport/Kconfig
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Gameport configuration
+#
+config GAMEPORT
+	tristate "Gameport support"
+	depends on !UML
+	help
+	  Gameport support is for the standard 15-pin PC gameport. If you
+	  have a joystick, gamepad, gameport card, a soundcard with a gameport
+	  or anything else that uses the gameport, say Y or M here and also to
+	  at least one of the hardware specific drivers.
+
+	  For Ensoniq AudioPCI (ES1370), AudioPCI 97 (ES1371), ESS Solo1,
+	  S3 SonicVibes, Trident 4DWave, SiS7018, and ALi 5451 gameport
+	  support is provided by the sound drivers, so you won't need any
+	  from the below listed modules. You still need to say Y here.
+
+	  If unsure, say Y.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gameport.
+
+if GAMEPORT
+
+config GAMEPORT_NS558
+	tristate "Classic ISA and PnP gameport support"
+	help
+	  Say Y here if you have an ISA or PnP gameport.
+
+	  If unsure, say Y.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ns558.
+
+config GAMEPORT_L4
+	tristate "PDPI Lightning 4 gamecard support"
+	help
+	  Say Y here if you have a PDPI Lightning 4 gamecard.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called lightning.
+
+config GAMEPORT_EMU10K1
+	tristate "SB Live and Audigy gameport support"
+	depends on PCI
+	help
+	  Say Y here if you have a SoundBlaster Live! or SoundBlaster
+	  Audigy card and want to use its gameport.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called emu10k1-gp.
+
+config GAMEPORT_FM801
+	tristate "ForteMedia FM801 gameport support"
+	depends on PCI
+	help
+	  Say Y here if you have ForteMedia FM801 PCI audio controller
+	  (Abit AU10, Genius Sound Maker, HP Workstation zx2000,
+	  and others), and want to use its gameport.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called fm801-gp.
+
+endif
diff --git a/drivers/input/gameport/Makefile b/drivers/input/gameport/Makefile
new file mode 100644
index 000000000..73ad8fe4d
--- /dev/null
+++ b/drivers/input/gameport/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the gameport drivers.
+#
+
+# Each configuration option enables a list of files.
+
+obj-$(CONFIG_GAMEPORT)		+= gameport.o
+obj-$(CONFIG_GAMEPORT_EMU10K1)	+= emu10k1-gp.o
+obj-$(CONFIG_GAMEPORT_FM801)	+= fm801-gp.o
+obj-$(CONFIG_GAMEPORT_L4)	+= lightning.o
+obj-$(CONFIG_GAMEPORT_NS558)	+= ns558.o
diff --git a/drivers/input/gameport/emu10k1-gp.c b/drivers/input/gameport/emu10k1-gp.c
new file mode 100644
index 000000000..76ce41e58
--- /dev/null
+++ b/drivers/input/gameport/emu10k1-gp.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2001 Vojtech Pavlik
+ */
+
+/*
+ * EMU10k1 - SB Live / Audigy - gameport driver for Linux
+ */
+
+#include <asm/io.h>
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/gameport.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("EMU10k1 gameport driver");
+MODULE_LICENSE("GPL");
+
+struct emu {
+	struct pci_dev *dev;
+	struct gameport *gameport;
+	int io;
+	int size;
+};
+
+static const struct pci_device_id emu_tbl[] = {
+
+	{ 0x1102, 0x7002, PCI_ANY_ID, PCI_ANY_ID }, /* SB Live gameport */
+	{ 0x1102, 0x7003, PCI_ANY_ID, PCI_ANY_ID }, /* Audigy gameport */
+	{ 0x1102, 0x7004, PCI_ANY_ID, PCI_ANY_ID }, /* Dell SB Live */
+	{ 0x1102, 0x7005, PCI_ANY_ID, PCI_ANY_ID }, /* Audigy LS gameport */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, emu_tbl);
+
+static int emu_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct emu *emu;
+	struct gameport *port;
+	int error;
+
+	emu = kzalloc(sizeof(struct emu), GFP_KERNEL);
+	port = gameport_allocate_port();
+	if (!emu || !port) {
+		printk(KERN_ERR "emu10k1-gp: Memory allocation failed\n");
+		error = -ENOMEM;
+		goto err_out_free;
+	}
+
+	error = pci_enable_device(pdev);
+	if (error)
+		goto err_out_free;
+
+	emu->io = pci_resource_start(pdev, 0);
+	emu->size = pci_resource_len(pdev, 0);
+
+	emu->dev = pdev;
+	emu->gameport = port;
+
+	gameport_set_name(port, "EMU10K1");
+	gameport_set_phys(port, "pci%s/gameport0", pci_name(pdev));
+	port->dev.parent = &pdev->dev;
+	port->io = emu->io;
+
+	if (!request_region(emu->io, emu->size, "emu10k1-gp")) {
+		printk(KERN_ERR "emu10k1-gp: unable to grab region 0x%x-0x%x\n",
+			emu->io, emu->io + emu->size - 1);
+		error = -EBUSY;
+		goto err_out_disable_dev;
+	}
+
+	pci_set_drvdata(pdev, emu);
+
+	gameport_register_port(port);
+
+	return 0;
+
+ err_out_disable_dev:
+	pci_disable_device(pdev);
+ err_out_free:
+	gameport_free_port(port);
+	kfree(emu);
+	return error;
+}
+
+static void emu_remove(struct pci_dev *pdev)
+{
+	struct emu *emu = pci_get_drvdata(pdev);
+
+	gameport_unregister_port(emu->gameport);
+	release_region(emu->io, emu->size);
+	kfree(emu);
+
+	pci_disable_device(pdev);
+}
+
+static struct pci_driver emu_driver = {
+        .name =         "Emu10k1_gameport",
+        .id_table =     emu_tbl,
+        .probe =        emu_probe,
+	.remove =	emu_remove,
+};
+
+module_pci_driver(emu_driver);
diff --git a/drivers/input/gameport/fm801-gp.c b/drivers/input/gameport/fm801-gp.c
new file mode 100644
index 000000000..e785d36b1
--- /dev/null
+++ b/drivers/input/gameport/fm801-gp.c
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  FM801 gameport driver for Linux
+ *
+ *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ */
+
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/gameport.h>
+
+#define PCI_VENDOR_ID_FORTEMEDIA	0x1319
+#define PCI_DEVICE_ID_FM801_GP	0x0802
+
+#define HAVE_COOKED
+
+struct fm801_gp {
+	struct gameport *gameport;
+	struct resource *res_port;
+};
+
+#ifdef HAVE_COOKED
+static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
+{
+	unsigned short w;
+
+	w = inw(gameport->io + 2);
+	*buttons = (~w >> 14) & 0x03;
+	axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
+	w = inw(gameport->io + 4);
+	axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
+	w = inw(gameport->io + 6);
+	*buttons |= ((~w >> 14) & 0x03) << 2;
+	axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
+	w = inw(gameport->io + 8);
+	axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
+	outw(0xff, gameport->io); /* reset */
+
+        return 0;
+}
+#endif
+
+static int fm801_gp_open(struct gameport *gameport, int mode)
+{
+	switch (mode) {
+#ifdef HAVE_COOKED
+	case GAMEPORT_MODE_COOKED:
+		return 0;
+#endif
+	case GAMEPORT_MODE_RAW:
+		return 0;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static int fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
+{
+	struct fm801_gp *gp;
+	struct gameport *port;
+	int error;
+
+	gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
+	port = gameport_allocate_port();
+	if (!gp || !port) {
+		printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
+		error = -ENOMEM;
+		goto err_out_free;
+	}
+
+	error = pci_enable_device(pci);
+	if (error)
+		goto err_out_free;
+
+	port->open = fm801_gp_open;
+#ifdef HAVE_COOKED
+	port->cooked_read = fm801_gp_cooked_read;
+#endif
+	gameport_set_name(port, "FM801");
+	gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
+	port->dev.parent = &pci->dev;
+	port->io = pci_resource_start(pci, 0);
+
+	gp->gameport = port;
+	gp->res_port = request_region(port->io, 0x10, "FM801 GP");
+	if (!gp->res_port) {
+		printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
+			port->io, port->io + 0x0f);
+		error = -EBUSY;
+		goto err_out_disable_dev;
+	}
+
+	pci_set_drvdata(pci, gp);
+
+	outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
+	gameport_register_port(port);
+
+	return 0;
+
+ err_out_disable_dev:
+	pci_disable_device(pci);
+ err_out_free:
+	gameport_free_port(port);
+	kfree(gp);
+	return error;
+}
+
+static void fm801_gp_remove(struct pci_dev *pci)
+{
+	struct fm801_gp *gp = pci_get_drvdata(pci);
+
+	gameport_unregister_port(gp->gameport);
+	release_resource(gp->res_port);
+	kfree(gp);
+
+	pci_disable_device(pci);
+}
+
+static const struct pci_device_id fm801_gp_id_table[] = {
+	{ PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
+
+static struct pci_driver fm801_gp_driver = {
+	.name =		"FM801_gameport",
+	.id_table =	fm801_gp_id_table,
+	.probe =	fm801_gp_probe,
+	.remove =	fm801_gp_remove,
+};
+
+module_pci_driver(fm801_gp_driver);
+
+MODULE_DESCRIPTION("FM801 gameport driver");
+MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
new file mode 100644
index 000000000..db58a01b2
--- /dev/null
+++ b/drivers/input/gameport/gameport.c
@@ -0,0 +1,855 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic gameport layer
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2005 Dmitry Torokhov
+ */
+
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/gameport.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>	/* HZ */
+#include <linux/mutex.h>
+#include <linux/timekeeping.h>
+
+/*#include <asm/io.h>*/
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Generic gameport layer");
+MODULE_LICENSE("GPL");
+
+static bool use_ktime = true;
+module_param(use_ktime, bool, 0400);
+MODULE_PARM_DESC(use_ktime, "Use ktime for measuring I/O speed");
+
+/*
+ * gameport_mutex protects entire gameport subsystem and is taken
+ * every time gameport port or driver registrered or unregistered.
+ */
+static DEFINE_MUTEX(gameport_mutex);
+
+static LIST_HEAD(gameport_list);
+
+static struct bus_type gameport_bus;
+
+static void gameport_add_port(struct gameport *gameport);
+static void gameport_attach_driver(struct gameport_driver *drv);
+static void gameport_reconnect_port(struct gameport *gameport);
+static void gameport_disconnect_port(struct gameport *gameport);
+
+#if defined(__i386__)
+
+#include <linux/i8253.h>
+
+#define DELTA(x,y)      ((y)-(x)+((y)<(x)?1193182/HZ:0))
+#define GET_TIME(x)     do { x = get_time_pit(); } while (0)
+
+static unsigned int get_time_pit(void)
+{
+	unsigned long flags;
+	unsigned int count;
+
+	raw_spin_lock_irqsave(&i8253_lock, flags);
+	outb_p(0x00, 0x43);
+	count = inb_p(0x40);
+	count |= inb_p(0x40) << 8;
+	raw_spin_unlock_irqrestore(&i8253_lock, flags);
+
+	return count;
+}
+
+#endif
+
+
+
+/*
+ * gameport_measure_speed() measures the gameport i/o speed.
+ */
+
+static int gameport_measure_speed(struct gameport *gameport)
+{
+	unsigned int i, t, tx;
+	u64 t1, t2, t3;
+	unsigned long flags;
+
+	if (gameport_open(gameport, NULL, GAMEPORT_MODE_RAW))
+		return 0;
+
+	tx = ~0;
+
+	for (i = 0; i < 50; i++) {
+		local_irq_save(flags);
+		t1 = ktime_get_ns();
+		for (t = 0; t < 50; t++)
+			gameport_read(gameport);
+		t2 = ktime_get_ns();
+		t3 = ktime_get_ns();
+		local_irq_restore(flags);
+		udelay(i * 10);
+		t = (t2 - t1) - (t3 - t2);
+		if (t < tx)
+			tx = t;
+	}
+
+	gameport_close(gameport);
+	t = 1000000 * 50;
+	if (tx)
+		t /= tx;
+	return t;
+}
+
+static int old_gameport_measure_speed(struct gameport *gameport)
+{
+#if defined(__i386__)
+
+	unsigned int i, t, t1, t2, t3, tx;
+	unsigned long flags;
+
+	if (gameport_open(gameport, NULL, GAMEPORT_MODE_RAW))
+		return 0;
+
+	tx = 1 << 30;
+
+	for(i = 0; i < 50; i++) {
+		local_irq_save(flags);
+		GET_TIME(t1);
+		for (t = 0; t < 50; t++) gameport_read(gameport);
+		GET_TIME(t2);
+		GET_TIME(t3);
+		local_irq_restore(flags);
+		udelay(i * 10);
+		if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t;
+	}
+
+	gameport_close(gameport);
+	return 59659 / (tx < 1 ? 1 : tx);
+
+#elif defined (__x86_64__)
+
+	unsigned int i, t;
+	unsigned long tx, t1, t2, flags;
+
+	if (gameport_open(gameport, NULL, GAMEPORT_MODE_RAW))
+		return 0;
+
+	tx = 1 << 30;
+
+	for(i = 0; i < 50; i++) {
+		local_irq_save(flags);
+		t1 = rdtsc();
+		for (t = 0; t < 50; t++) gameport_read(gameport);
+		t2 = rdtsc();
+		local_irq_restore(flags);
+		udelay(i * 10);
+		if (t2 - t1 < tx) tx = t2 - t1;
+	}
+
+	gameport_close(gameport);
+	return (this_cpu_read(cpu_info.loops_per_jiffy) *
+		(unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx);
+
+#else
+
+	unsigned int j, t = 0;
+
+	if (gameport_open(gameport, NULL, GAMEPORT_MODE_RAW))
+		return 0;
+
+	j = jiffies; while (j == jiffies);
+	j = jiffies; while (j == jiffies) { t++; gameport_read(gameport); }
+
+	gameport_close(gameport);
+	return t * HZ / 1000;
+
+#endif
+}
+
+void gameport_start_polling(struct gameport *gameport)
+{
+	spin_lock(&gameport->timer_lock);
+
+	if (!gameport->poll_cnt++) {
+		BUG_ON(!gameport->poll_handler);
+		BUG_ON(!gameport->poll_interval);
+		mod_timer(&gameport->poll_timer, jiffies + msecs_to_jiffies(gameport->poll_interval));
+	}
+
+	spin_unlock(&gameport->timer_lock);
+}
+EXPORT_SYMBOL(gameport_start_polling);
+
+void gameport_stop_polling(struct gameport *gameport)
+{
+	spin_lock(&gameport->timer_lock);
+
+	if (!--gameport->poll_cnt)
+		del_timer(&gameport->poll_timer);
+
+	spin_unlock(&gameport->timer_lock);
+}
+EXPORT_SYMBOL(gameport_stop_polling);
+
+static void gameport_run_poll_handler(struct timer_list *t)
+{
+	struct gameport *gameport = from_timer(gameport, t, poll_timer);
+
+	gameport->poll_handler(gameport);
+	if (gameport->poll_cnt)
+		mod_timer(&gameport->poll_timer, jiffies + msecs_to_jiffies(gameport->poll_interval));
+}
+
+/*
+ * Basic gameport -> driver core mappings
+ */
+
+static int gameport_bind_driver(struct gameport *gameport, struct gameport_driver *drv)
+{
+	int error;
+
+	gameport->dev.driver = &drv->driver;
+	if (drv->connect(gameport, drv)) {
+		gameport->dev.driver = NULL;
+		return -ENODEV;
+	}
+
+	error = device_bind_driver(&gameport->dev);
+	if (error) {
+		dev_warn(&gameport->dev,
+			 "device_bind_driver() failed for %s (%s) and %s, error: %d\n",
+			gameport->phys, gameport->name,
+			drv->description, error);
+		drv->disconnect(gameport);
+		gameport->dev.driver = NULL;
+		return error;
+	}
+
+	return 0;
+}
+
+static void gameport_find_driver(struct gameport *gameport)
+{
+	int error;
+
+	error = device_attach(&gameport->dev);
+	if (error < 0)
+		dev_warn(&gameport->dev,
+			 "device_attach() failed for %s (%s), error: %d\n",
+			 gameport->phys, gameport->name, error);
+}
+
+
+/*
+ * Gameport event processing.
+ */
+
+enum gameport_event_type {
+	GAMEPORT_REGISTER_PORT,
+	GAMEPORT_ATTACH_DRIVER,
+};
+
+struct gameport_event {
+	enum gameport_event_type type;
+	void *object;
+	struct module *owner;
+	struct list_head node;
+};
+
+static DEFINE_SPINLOCK(gameport_event_lock);	/* protects gameport_event_list */
+static LIST_HEAD(gameport_event_list);
+
+static struct gameport_event *gameport_get_event(void)
+{
+	struct gameport_event *event = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gameport_event_lock, flags);
+
+	if (!list_empty(&gameport_event_list)) {
+		event = list_first_entry(&gameport_event_list,
+					 struct gameport_event, node);
+		list_del_init(&event->node);
+	}
+
+	spin_unlock_irqrestore(&gameport_event_lock, flags);
+	return event;
+}
+
+static void gameport_free_event(struct gameport_event *event)
+{
+	module_put(event->owner);
+	kfree(event);
+}
+
+static void gameport_remove_duplicate_events(struct gameport_event *event)
+{
+	struct gameport_event *e, *next;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gameport_event_lock, flags);
+
+	list_for_each_entry_safe(e, next, &gameport_event_list, node) {
+		if (event->object == e->object) {
+			/*
+			 * If this event is of different type we should not
+			 * look further - we only suppress duplicate events
+			 * that were sent back-to-back.
+			 */
+			if (event->type != e->type)
+				break;
+
+			list_del_init(&e->node);
+			gameport_free_event(e);
+		}
+	}
+
+	spin_unlock_irqrestore(&gameport_event_lock, flags);
+}
+
+
+static void gameport_handle_events(struct work_struct *work)
+{
+	struct gameport_event *event;
+
+	mutex_lock(&gameport_mutex);
+
+	/*
+	 * Note that we handle only one event here to give swsusp
+	 * a chance to freeze kgameportd thread. Gameport events
+	 * should be pretty rare so we are not concerned about
+	 * taking performance hit.
+	 */
+	if ((event = gameport_get_event())) {
+
+		switch (event->type) {
+
+		case GAMEPORT_REGISTER_PORT:
+			gameport_add_port(event->object);
+			break;
+
+		case GAMEPORT_ATTACH_DRIVER:
+			gameport_attach_driver(event->object);
+			break;
+		}
+
+		gameport_remove_duplicate_events(event);
+		gameport_free_event(event);
+	}
+
+	mutex_unlock(&gameport_mutex);
+}
+
+static DECLARE_WORK(gameport_event_work, gameport_handle_events);
+
+static int gameport_queue_event(void *object, struct module *owner,
+				enum gameport_event_type event_type)
+{
+	unsigned long flags;
+	struct gameport_event *event;
+	int retval = 0;
+
+	spin_lock_irqsave(&gameport_event_lock, flags);
+
+	/*
+	 * Scan event list for the other events for the same gameport port,
+	 * starting with the most recent one. If event is the same we
+	 * do not need add new one. If event is of different type we
+	 * need to add this event and should not look further because
+	 * we need to preserve sequence of distinct events.
+	 */
+	list_for_each_entry_reverse(event, &gameport_event_list, node) {
+		if (event->object == object) {
+			if (event->type == event_type)
+				goto out;
+			break;
+		}
+	}
+
+	event = kmalloc(sizeof(struct gameport_event), GFP_ATOMIC);
+	if (!event) {
+		pr_err("Not enough memory to queue event %d\n", event_type);
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	if (!try_module_get(owner)) {
+		pr_warn("Can't get module reference, dropping event %d\n",
+			event_type);
+		kfree(event);
+		retval = -EINVAL;
+		goto out;
+	}
+
+	event->type = event_type;
+	event->object = object;
+	event->owner = owner;
+
+	list_add_tail(&event->node, &gameport_event_list);
+	queue_work(system_long_wq, &gameport_event_work);
+
+out:
+	spin_unlock_irqrestore(&gameport_event_lock, flags);
+	return retval;
+}
+
+/*
+ * Remove all events that have been submitted for a given object,
+ * be it a gameport port or a driver.
+ */
+static void gameport_remove_pending_events(void *object)
+{
+	struct gameport_event *event, *next;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gameport_event_lock, flags);
+
+	list_for_each_entry_safe(event, next, &gameport_event_list, node) {
+		if (event->object == object) {
+			list_del_init(&event->node);
+			gameport_free_event(event);
+		}
+	}
+
+	spin_unlock_irqrestore(&gameport_event_lock, flags);
+}
+
+/*
+ * Destroy child gameport port (if any) that has not been fully registered yet.
+ *
+ * Note that we rely on the fact that port can have only one child and therefore
+ * only one child registration request can be pending. Additionally, children
+ * are registered by driver's connect() handler so there can't be a grandchild
+ * pending registration together with a child.
+ */
+static struct gameport *gameport_get_pending_child(struct gameport *parent)
+{
+	struct gameport_event *event;
+	struct gameport *gameport, *child = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gameport_event_lock, flags);
+
+	list_for_each_entry(event, &gameport_event_list, node) {
+		if (event->type == GAMEPORT_REGISTER_PORT) {
+			gameport = event->object;
+			if (gameport->parent == parent) {
+				child = gameport;
+				break;
+			}
+		}
+	}
+
+	spin_unlock_irqrestore(&gameport_event_lock, flags);
+	return child;
+}
+
+/*
+ * Gameport port operations
+ */
+
+static ssize_t gameport_description_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct gameport *gameport = to_gameport_port(dev);
+
+	return sprintf(buf, "%s\n", gameport->name);
+}
+static DEVICE_ATTR(description, S_IRUGO, gameport_description_show, NULL);
+
+static ssize_t drvctl_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct gameport *gameport = to_gameport_port(dev);
+	struct device_driver *drv;
+	int error;
+
+	error = mutex_lock_interruptible(&gameport_mutex);
+	if (error)
+		return error;
+
+	if (!strncmp(buf, "none", count)) {
+		gameport_disconnect_port(gameport);
+	} else if (!strncmp(buf, "reconnect", count)) {
+		gameport_reconnect_port(gameport);
+	} else if (!strncmp(buf, "rescan", count)) {
+		gameport_disconnect_port(gameport);
+		gameport_find_driver(gameport);
+	} else if ((drv = driver_find(buf, &gameport_bus)) != NULL) {
+		gameport_disconnect_port(gameport);
+		error = gameport_bind_driver(gameport, to_gameport_driver(drv));
+	} else {
+		error = -EINVAL;
+	}
+
+	mutex_unlock(&gameport_mutex);
+
+	return error ? error : count;
+}
+static DEVICE_ATTR_WO(drvctl);
+
+static struct attribute *gameport_device_attrs[] = {
+	&dev_attr_description.attr,
+	&dev_attr_drvctl.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(gameport_device);
+
+static void gameport_release_port(struct device *dev)
+{
+	struct gameport *gameport = to_gameport_port(dev);
+
+	kfree(gameport);
+	module_put(THIS_MODULE);
+}
+
+void gameport_set_phys(struct gameport *gameport, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	vsnprintf(gameport->phys, sizeof(gameport->phys), fmt, args);
+	va_end(args);
+}
+EXPORT_SYMBOL(gameport_set_phys);
+
+/*
+ * Prepare gameport port for registration.
+ */
+static void gameport_init_port(struct gameport *gameport)
+{
+	static atomic_t gameport_no = ATOMIC_INIT(-1);
+
+	__module_get(THIS_MODULE);
+
+	mutex_init(&gameport->drv_mutex);
+	device_initialize(&gameport->dev);
+	dev_set_name(&gameport->dev, "gameport%lu",
+			(unsigned long)atomic_inc_return(&gameport_no));
+	gameport->dev.bus = &gameport_bus;
+	gameport->dev.release = gameport_release_port;
+	if (gameport->parent)
+		gameport->dev.parent = &gameport->parent->dev;
+
+	INIT_LIST_HEAD(&gameport->node);
+	spin_lock_init(&gameport->timer_lock);
+	timer_setup(&gameport->poll_timer, gameport_run_poll_handler, 0);
+}
+
+/*
+ * Complete gameport port registration.
+ * Driver core will attempt to find appropriate driver for the port.
+ */
+static void gameport_add_port(struct gameport *gameport)
+{
+	int error;
+
+	if (gameport->parent)
+		gameport->parent->child = gameport;
+
+	gameport->speed = use_ktime ?
+		gameport_measure_speed(gameport) :
+		old_gameport_measure_speed(gameport);
+
+	list_add_tail(&gameport->node, &gameport_list);
+
+	if (gameport->io)
+		dev_info(&gameport->dev, "%s is %s, io %#x, speed %dkHz\n",
+			 gameport->name, gameport->phys, gameport->io, gameport->speed);
+	else
+		dev_info(&gameport->dev, "%s is %s, speed %dkHz\n",
+			gameport->name, gameport->phys, gameport->speed);
+
+	error = device_add(&gameport->dev);
+	if (error)
+		dev_err(&gameport->dev,
+			"device_add() failed for %s (%s), error: %d\n",
+			gameport->phys, gameport->name, error);
+}
+
+/*
+ * gameport_destroy_port() completes deregistration process and removes
+ * port from the system
+ */
+static void gameport_destroy_port(struct gameport *gameport)
+{
+	struct gameport *child;
+
+	child = gameport_get_pending_child(gameport);
+	if (child) {
+		gameport_remove_pending_events(child);
+		put_device(&child->dev);
+	}
+
+	if (gameport->parent) {
+		gameport->parent->child = NULL;
+		gameport->parent = NULL;
+	}
+
+	if (device_is_registered(&gameport->dev))
+		device_del(&gameport->dev);
+
+	list_del_init(&gameport->node);
+
+	gameport_remove_pending_events(gameport);
+	put_device(&gameport->dev);
+}
+
+/*
+ * Reconnect gameport port and all its children (re-initialize attached devices)
+ */
+static void gameport_reconnect_port(struct gameport *gameport)
+{
+	do {
+		if (!gameport->drv || !gameport->drv->reconnect || gameport->drv->reconnect(gameport)) {
+			gameport_disconnect_port(gameport);
+			gameport_find_driver(gameport);
+			/* Ok, old children are now gone, we are done */
+			break;
+		}
+		gameport = gameport->child;
+	} while (gameport);
+}
+
+/*
+ * gameport_disconnect_port() unbinds a port from its driver. As a side effect
+ * all child ports are unbound and destroyed.
+ */
+static void gameport_disconnect_port(struct gameport *gameport)
+{
+	struct gameport *s, *parent;
+
+	if (gameport->child) {
+		/*
+		 * Children ports should be disconnected and destroyed
+		 * first, staring with the leaf one, since we don't want
+		 * to do recursion
+		 */
+		for (s = gameport; s->child; s = s->child)
+			/* empty */;
+
+		do {
+			parent = s->parent;
+
+			device_release_driver(&s->dev);
+			gameport_destroy_port(s);
+		} while ((s = parent) != gameport);
+	}
+
+	/*
+	 * Ok, no children left, now disconnect this port
+	 */
+	device_release_driver(&gameport->dev);
+}
+
+/*
+ * Submits register request to kgameportd for subsequent execution.
+ * Note that port registration is always asynchronous.
+ */
+void __gameport_register_port(struct gameport *gameport, struct module *owner)
+{
+	gameport_init_port(gameport);
+	gameport_queue_event(gameport, owner, GAMEPORT_REGISTER_PORT);
+}
+EXPORT_SYMBOL(__gameport_register_port);
+
+/*
+ * Synchronously unregisters gameport port.
+ */
+void gameport_unregister_port(struct gameport *gameport)
+{
+	mutex_lock(&gameport_mutex);
+	gameport_disconnect_port(gameport);
+	gameport_destroy_port(gameport);
+	mutex_unlock(&gameport_mutex);
+}
+EXPORT_SYMBOL(gameport_unregister_port);
+
+
+/*
+ * Gameport driver operations
+ */
+
+static ssize_t description_show(struct device_driver *drv, char *buf)
+{
+	struct gameport_driver *driver = to_gameport_driver(drv);
+	return sprintf(buf, "%s\n", driver->description ? driver->description : "(none)");
+}
+static DRIVER_ATTR_RO(description);
+
+static struct attribute *gameport_driver_attrs[] = {
+	&driver_attr_description.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(gameport_driver);
+
+static int gameport_driver_probe(struct device *dev)
+{
+	struct gameport *gameport = to_gameport_port(dev);
+	struct gameport_driver *drv = to_gameport_driver(dev->driver);
+
+	drv->connect(gameport, drv);
+	return gameport->drv ? 0 : -ENODEV;
+}
+
+static void gameport_driver_remove(struct device *dev)
+{
+	struct gameport *gameport = to_gameport_port(dev);
+	struct gameport_driver *drv = to_gameport_driver(dev->driver);
+
+	drv->disconnect(gameport);
+}
+
+static void gameport_attach_driver(struct gameport_driver *drv)
+{
+	int error;
+
+	error = driver_attach(&drv->driver);
+	if (error)
+		pr_err("driver_attach() failed for %s, error: %d\n",
+			drv->driver.name, error);
+}
+
+int __gameport_register_driver(struct gameport_driver *drv, struct module *owner,
+				const char *mod_name)
+{
+	int error;
+
+	drv->driver.bus = &gameport_bus;
+	drv->driver.owner = owner;
+	drv->driver.mod_name = mod_name;
+
+	/*
+	 * Temporarily disable automatic binding because probing
+	 * takes long time and we are better off doing it in kgameportd
+	 */
+	drv->ignore = true;
+
+	error = driver_register(&drv->driver);
+	if (error) {
+		pr_err("driver_register() failed for %s, error: %d\n",
+			drv->driver.name, error);
+		return error;
+	}
+
+	/*
+	 * Reset ignore flag and let kgameportd bind the driver to free ports
+	 */
+	drv->ignore = false;
+	error = gameport_queue_event(drv, NULL, GAMEPORT_ATTACH_DRIVER);
+	if (error) {
+		driver_unregister(&drv->driver);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(__gameport_register_driver);
+
+void gameport_unregister_driver(struct gameport_driver *drv)
+{
+	struct gameport *gameport;
+
+	mutex_lock(&gameport_mutex);
+
+	drv->ignore = true;	/* so gameport_find_driver ignores it */
+	gameport_remove_pending_events(drv);
+
+start_over:
+	list_for_each_entry(gameport, &gameport_list, node) {
+		if (gameport->drv == drv) {
+			gameport_disconnect_port(gameport);
+			gameport_find_driver(gameport);
+			/* we could've deleted some ports, restart */
+			goto start_over;
+		}
+	}
+
+	driver_unregister(&drv->driver);
+
+	mutex_unlock(&gameport_mutex);
+}
+EXPORT_SYMBOL(gameport_unregister_driver);
+
+static int gameport_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct gameport_driver *gameport_drv = to_gameport_driver(drv);
+
+	return !gameport_drv->ignore;
+}
+
+static struct bus_type gameport_bus = {
+	.name		= "gameport",
+	.dev_groups	= gameport_device_groups,
+	.drv_groups	= gameport_driver_groups,
+	.match		= gameport_bus_match,
+	.probe		= gameport_driver_probe,
+	.remove		= gameport_driver_remove,
+};
+
+static void gameport_set_drv(struct gameport *gameport, struct gameport_driver *drv)
+{
+	mutex_lock(&gameport->drv_mutex);
+	gameport->drv = drv;
+	mutex_unlock(&gameport->drv_mutex);
+}
+
+int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode)
+{
+	if (gameport->open) {
+		if (gameport->open(gameport, mode)) {
+			return -1;
+		}
+	} else {
+		if (mode != GAMEPORT_MODE_RAW)
+			return -1;
+	}
+
+	gameport_set_drv(gameport, drv);
+	return 0;
+}
+EXPORT_SYMBOL(gameport_open);
+
+void gameport_close(struct gameport *gameport)
+{
+	del_timer_sync(&gameport->poll_timer);
+	gameport->poll_handler = NULL;
+	gameport->poll_interval = 0;
+	gameport_set_drv(gameport, NULL);
+	if (gameport->close)
+		gameport->close(gameport);
+}
+EXPORT_SYMBOL(gameport_close);
+
+static int __init gameport_init(void)
+{
+	int error;
+
+	error = bus_register(&gameport_bus);
+	if (error) {
+		pr_err("failed to register gameport bus, error: %d\n", error);
+		return error;
+	}
+
+
+	return 0;
+}
+
+static void __exit gameport_exit(void)
+{
+	bus_unregister(&gameport_bus);
+
+	/*
+	 * There should not be any outstanding events but work may
+	 * still be scheduled so simply cancel it.
+	 */
+	cancel_work_sync(&gameport_event_work);
+}
+
+subsys_initcall(gameport_init);
+module_exit(gameport_exit);
diff --git a/drivers/input/gameport/lightning.c b/drivers/input/gameport/lightning.c
new file mode 100644
index 000000000..2ce717b25
--- /dev/null
+++ b/drivers/input/gameport/lightning.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1998-2001 Vojtech Pavlik
+ */
+
+/*
+ * PDPI Lightning 4 gamecard driver for Linux.
+ */
+
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gameport.h>
+
+#define L4_PORT			0x201
+#define L4_SELECT_ANALOG	0xa4
+#define L4_SELECT_DIGITAL	0xa5
+#define L4_SELECT_SECONDARY	0xa6
+#define L4_CMD_ID		0x80
+#define L4_CMD_GETCAL		0x92
+#define L4_CMD_SETCAL		0x93
+#define L4_ID			0x04
+#define L4_BUSY			0x01
+#define L4_TIMEOUT		80	/* 80 us */
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
+MODULE_LICENSE("GPL");
+
+struct l4 {
+	struct gameport *gameport;
+	unsigned char port;
+};
+
+static struct l4 l4_ports[8];
+
+/*
+ * l4_wait_ready() waits for the L4 to become ready.
+ */
+
+static int l4_wait_ready(void)
+{
+	unsigned int t = L4_TIMEOUT;
+
+	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
+	return -(t <= 0);
+}
+
+/*
+ * l4_cooked_read() reads data from the Lightning 4.
+ */
+
+static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
+{
+	struct l4 *l4 = gameport->port_data;
+	unsigned char status;
+	int i, result = -1;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
+
+	if (inb(L4_PORT) & L4_BUSY) goto fail;
+	outb(l4->port & 3, L4_PORT);
+
+	if (l4_wait_ready()) goto fail;
+	status = inb(L4_PORT);
+
+	for (i = 0; i < 4; i++)
+		if (status & (1 << i)) {
+			if (l4_wait_ready()) goto fail;
+			axes[i] = inb(L4_PORT);
+			if (axes[i] > 252) axes[i] = -1;
+		}
+
+	if (status & 0x10) {
+		if (l4_wait_ready()) goto fail;
+		*buttons = inb(L4_PORT) & 0x0f;
+	}
+
+	result = 0;
+
+fail:	outb(L4_SELECT_ANALOG, L4_PORT);
+	return result;
+}
+
+static int l4_open(struct gameport *gameport, int mode)
+{
+	struct l4 *l4 = gameport->port_data;
+
+        if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
+		return -1;
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	return 0;
+}
+
+/*
+ * l4_getcal() reads the L4 with calibration values.
+ */
+
+static int l4_getcal(int port, int *cal)
+{
+	int i, result = -1;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
+	if (inb(L4_PORT) & L4_BUSY)
+		goto out;
+
+	outb(L4_CMD_GETCAL, L4_PORT);
+	if (l4_wait_ready())
+		goto out;
+
+	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
+		goto out;
+
+	if (l4_wait_ready())
+		goto out;
+        outb(port & 3, L4_PORT);
+
+	for (i = 0; i < 4; i++) {
+		if (l4_wait_ready())
+			goto out;
+		cal[i] = inb(L4_PORT);
+	}
+
+	result = 0;
+
+out:	outb(L4_SELECT_ANALOG, L4_PORT);
+	return result;
+}
+
+/*
+ * l4_setcal() programs the L4 with calibration values.
+ */
+
+static int l4_setcal(int port, int *cal)
+{
+	int i, result = -1;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
+	if (inb(L4_PORT) & L4_BUSY)
+		goto out;
+
+	outb(L4_CMD_SETCAL, L4_PORT);
+	if (l4_wait_ready())
+		goto out;
+
+	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
+		goto out;
+
+	if (l4_wait_ready())
+		goto out;
+        outb(port & 3, L4_PORT);
+
+	for (i = 0; i < 4; i++) {
+		if (l4_wait_ready())
+			goto out;
+		outb(cal[i], L4_PORT);
+	}
+
+	result = 0;
+
+out:	outb(L4_SELECT_ANALOG, L4_PORT);
+	return result;
+}
+
+/*
+ * l4_calibrate() calibrates the L4 for the attached device, so
+ * that the device's resistance fits into the L4's 8-bit range.
+ */
+
+static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
+{
+	int i, t;
+	int cal[4];
+	struct l4 *l4 = gameport->port_data;
+
+	if (l4_getcal(l4->port, cal))
+		return -1;
+
+	for (i = 0; i < 4; i++) {
+		t = (max[i] * cal[i]) / 200;
+		t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
+		axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
+		axes[i] = (axes[i] > 252) ? 252 : axes[i];
+		cal[i] = t;
+	}
+
+	if (l4_setcal(l4->port, cal))
+		return -1;
+
+	return 0;
+}
+
+static int __init l4_create_ports(int card_no)
+{
+	struct l4 *l4;
+	struct gameport *port;
+	int i, idx;
+
+	for (i = 0; i < 4; i++) {
+
+		idx = card_no * 4 + i;
+		l4 = &l4_ports[idx];
+
+		if (!(l4->gameport = port = gameport_allocate_port())) {
+			printk(KERN_ERR "lightning: Memory allocation failed\n");
+			while (--i >= 0) {
+				gameport_free_port(l4->gameport);
+				l4->gameport = NULL;
+			}
+			return -ENOMEM;
+		}
+		l4->port = idx;
+
+		port->port_data = l4;
+		port->open = l4_open;
+		port->cooked_read = l4_cooked_read;
+		port->calibrate = l4_calibrate;
+
+		gameport_set_name(port, "PDPI Lightning 4");
+		gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);
+
+		if (idx == 0)
+			port->io = L4_PORT;
+	}
+
+	return 0;
+}
+
+static int __init l4_add_card(int card_no)
+{
+	int cal[4] = { 255, 255, 255, 255 };
+	int i, rev, result;
+	struct l4 *l4;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);
+
+	if (inb(L4_PORT) & L4_BUSY)
+		return -1;
+	outb(L4_CMD_ID, L4_PORT);
+
+	if (l4_wait_ready())
+		return -1;
+
+	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
+		return -1;
+
+	if (l4_wait_ready())
+		return -1;
+	if (inb(L4_PORT) != L4_ID)
+		return -1;
+
+	if (l4_wait_ready())
+		return -1;
+	rev = inb(L4_PORT);
+
+	if (!rev)
+		return -1;
+
+	result = l4_create_ports(card_no);
+	if (result)
+		return result;
+
+	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
+		card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
+
+	for (i = 0; i < 4; i++) {
+		l4 = &l4_ports[card_no * 4 + i];
+
+		if (rev > 0x28)		/* on 2.9+ the setcal command works correctly */
+			l4_setcal(l4->port, cal);
+		gameport_register_port(l4->gameport);
+	}
+
+	return 0;
+}
+
+static int __init l4_init(void)
+{
+	int i, cards = 0;
+
+	if (!request_region(L4_PORT, 1, "lightning"))
+		return -EBUSY;
+
+	for (i = 0; i < 2; i++)
+		if (l4_add_card(i) == 0)
+			cards++;
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+
+	if (!cards) {
+		release_region(L4_PORT, 1);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void __exit l4_exit(void)
+{
+	int i;
+	int cal[4] = { 59, 59, 59, 59 };
+
+	for (i = 0; i < 8; i++)
+		if (l4_ports[i].gameport) {
+			l4_setcal(l4_ports[i].port, cal);
+			gameport_unregister_port(l4_ports[i].gameport);
+		}
+
+	outb(L4_SELECT_ANALOG, L4_PORT);
+	release_region(L4_PORT, 1);
+}
+
+module_init(l4_init);
+module_exit(l4_exit);
diff --git a/drivers/input/gameport/ns558.c b/drivers/input/gameport/ns558.c
new file mode 100644
index 000000000..91a8cd346
--- /dev/null
+++ b/drivers/input/gameport/ns558.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ *  Copyright (c) 1999 Brian Gerst
+ */
+
+/*
+ * NS558 based standard IBM game port driver for Linux
+ */
+
+#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);