Adding upstream version 5.10.209.upstream/5.10.209

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

29 files changed, 8612 insertions, 0 deletions

diff --git a/drivers/pnp/Kconfig b/drivers/pnp/Kconfig
new file mode 100644
index 000000000..a72141dff
--- /dev/null
+++ b/drivers/pnp/Kconfig
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Plug and Play configuration
+#
+
+menuconfig PNP
+	bool "Plug and Play support"
+	depends on HAS_IOMEM
+	depends on ISA || ACPI
+	help
+	  Plug and Play (PnP) is a standard for peripherals which allows those
+	  peripherals to be configured by software, e.g. assign IRQ's or other
+	  parameters. No jumpers on the cards are needed, instead the values
+	  are provided to the cards from the BIOS, from the operating system,
+	  or using a user-space utility.
+
+	  Say Y here if you would like Linux to configure your Plug and Play
+	  devices. You should then also say Y to all of the protocols below.
+	  Alternatively, you can say N here and configure your PnP devices
+	  using user space utilities such as the isapnptools package.
+
+	  If unsure, say Y.
+
+config PNP_DEBUG_MESSAGES
+	default y
+	bool "PNP debugging messages"
+	depends on PNP
+	help
+	  Say Y here if you want the PNP layer to be able to produce debugging
+	  messages if needed.  The messages can be enabled at boot-time with
+	  the pnp.debug kernel parameter.
+
+	  This option allows you to save a bit of space if you do not want
+	  the messages to even be built into the kernel.
+
+	  If you have any doubts about this, say Y here.
+
+if PNP
+
+comment "Protocols"
+
+source "drivers/pnp/isapnp/Kconfig"
+
+source "drivers/pnp/pnpbios/Kconfig"
+
+source "drivers/pnp/pnpacpi/Kconfig"
+
+endif # PNP
diff --git a/drivers/pnp/Makefile b/drivers/pnp/Makefile
new file mode 100644
index 000000000..71d532f18
--- /dev/null
+++ b/drivers/pnp/Makefile
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Plug-and-Play Support.
+#
+
+obj-y		:= pnp.o
+
+pnp-y		:= core.o card.o driver.o resource.o manager.o support.o interface.o quirks.o
+
+obj-$(CONFIG_PNPACPI)		+= pnpacpi/
+obj-$(CONFIG_PNPBIOS)		+= pnpbios/
+obj-$(CONFIG_ISAPNP)		+= isapnp/
+
+# pnp_system_init goes after pnpacpi/pnpbios init
+pnp-y				+= system.o
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
new file mode 100644
index 000000000..cdcfa39cf
--- /dev/null
+++ b/drivers/pnp/base.h
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+extern struct mutex pnp_lock;
+extern const struct attribute_group *pnp_dev_groups[];
+void *pnp_alloc(long size);
+
+int pnp_register_protocol(struct pnp_protocol *protocol);
+void pnp_unregister_protocol(struct pnp_protocol *protocol);
+
+#define PNP_EISA_ID_MASK 0x7fffffff
+void pnp_eisa_id_to_string(u32 id, char *str);
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *, int id,
+			      const char *pnpid);
+struct pnp_card *pnp_alloc_card(struct pnp_protocol *, int id, char *pnpid);
+
+int pnp_add_device(struct pnp_dev *dev);
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id);
+
+int pnp_add_card(struct pnp_card *card);
+void pnp_remove_card(struct pnp_card *card);
+int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
+void pnp_remove_card_device(struct pnp_dev *dev);
+
+struct pnp_port {
+	resource_size_t min;	/* min base number */
+	resource_size_t max;	/* max base number */
+	resource_size_t align;	/* align boundary */
+	resource_size_t size;	/* size of range */
+	unsigned char flags;	/* port flags */
+};
+
+#define PNP_IRQ_NR 256
+typedef struct { DECLARE_BITMAP(bits, PNP_IRQ_NR); } pnp_irq_mask_t;
+
+struct pnp_irq {
+	pnp_irq_mask_t map;	/* bitmap for IRQ lines */
+	unsigned char flags;	/* IRQ flags */
+};
+
+struct pnp_dma {
+	unsigned char map;	/* bitmask for DMA channels */
+	unsigned char flags;	/* DMA flags */
+};
+
+struct pnp_mem {
+	resource_size_t min;	/* min base number */
+	resource_size_t max;	/* max base number */
+	resource_size_t align;	/* align boundary */
+	resource_size_t size;	/* size of range */
+	unsigned char flags;	/* memory flags */
+};
+
+#define PNP_OPTION_DEPENDENT		0x80000000
+#define PNP_OPTION_SET_MASK		0xffff
+#define PNP_OPTION_SET_SHIFT		12
+#define PNP_OPTION_PRIORITY_MASK	0xfff
+#define PNP_OPTION_PRIORITY_SHIFT	0
+
+#define PNP_RES_PRIORITY_PREFERRED	0
+#define PNP_RES_PRIORITY_ACCEPTABLE	1
+#define PNP_RES_PRIORITY_FUNCTIONAL	2
+#define PNP_RES_PRIORITY_INVALID	PNP_OPTION_PRIORITY_MASK
+
+struct pnp_option {
+	struct list_head list;
+	unsigned int flags;	/* independent/dependent, set, priority */
+
+	unsigned long type;	/* IORESOURCE_{IO,MEM,IRQ,DMA} */
+	union {
+		struct pnp_port port;
+		struct pnp_irq irq;
+		struct pnp_dma dma;
+		struct pnp_mem mem;
+	} u;
+};
+
+int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      pnp_irq_mask_t *map, unsigned char flags);
+int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      unsigned char map, unsigned char flags);
+int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
+			       resource_size_t min, resource_size_t max,
+			       resource_size_t align, resource_size_t size,
+			       unsigned char flags);
+int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      resource_size_t min, resource_size_t max,
+			      resource_size_t align, resource_size_t size,
+			      unsigned char flags);
+
+static inline int pnp_option_is_dependent(struct pnp_option *option)
+{
+	return option->flags & PNP_OPTION_DEPENDENT ? 1 : 0;
+}
+
+static inline unsigned int pnp_option_set(struct pnp_option *option)
+{
+	return (option->flags >> PNP_OPTION_SET_SHIFT) & PNP_OPTION_SET_MASK;
+}
+
+static inline unsigned int pnp_option_priority(struct pnp_option *option)
+{
+	return (option->flags >> PNP_OPTION_PRIORITY_SHIFT) &
+	    PNP_OPTION_PRIORITY_MASK;
+}
+
+static inline unsigned int pnp_new_dependent_set(struct pnp_dev *dev,
+						 int priority)
+{
+	unsigned int flags;
+
+	if (priority > PNP_RES_PRIORITY_FUNCTIONAL) {
+		dev_warn(&dev->dev, "invalid dependent option priority %d "
+			 "clipped to %d", priority,
+			 PNP_RES_PRIORITY_INVALID);
+		priority = PNP_RES_PRIORITY_INVALID;
+	}
+
+	flags = PNP_OPTION_DEPENDENT |
+	    ((dev->num_dependent_sets & PNP_OPTION_SET_MASK) <<
+		PNP_OPTION_SET_SHIFT) |
+	    ((priority & PNP_OPTION_PRIORITY_MASK) <<
+		PNP_OPTION_PRIORITY_SHIFT);
+
+	dev->num_dependent_sets++;
+
+	return flags;
+}
+
+char *pnp_option_priority_name(struct pnp_option *option);
+void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option);
+
+void pnp_init_resources(struct pnp_dev *dev);
+
+void pnp_fixup_device(struct pnp_dev *dev);
+void pnp_free_options(struct pnp_dev *dev);
+int __pnp_add_device(struct pnp_dev *dev);
+void __pnp_remove_device(struct pnp_dev *dev);
+
+int pnp_check_port(struct pnp_dev *dev, struct resource *res);
+int pnp_check_mem(struct pnp_dev *dev, struct resource *res);
+int pnp_check_irq(struct pnp_dev *dev, struct resource *res);
+#ifdef CONFIG_ISA_DMA_API
+int pnp_check_dma(struct pnp_dev *dev, struct resource *res);
+#endif
+
+char *pnp_resource_type_name(struct resource *res);
+void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
+
+void pnp_free_resources(struct pnp_dev *dev);
+unsigned long pnp_resource_type(struct resource *res);
+
+struct pnp_resource {
+	struct list_head list;
+	struct resource res;
+};
+
+void pnp_free_resource(struct pnp_resource *pnp_res);
+
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+				      struct resource *res);
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+					  int flags);
+struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
+					  int flags);
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+					 resource_size_t start,
+					 resource_size_t end, int flags);
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end, int flags);
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end);
+
+extern int pnp_debug;
+
+#if defined(CONFIG_PNP_DEBUG_MESSAGES)
+#define pnp_dbg(dev, format, arg...)					\
+	({ if (pnp_debug) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
+#else
+#define pnp_dbg(dev, format, arg...)					\
+	({ if (0) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
+#endif
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
new file mode 100644
index 000000000..c2464ee08
--- /dev/null
+++ b/drivers/pnp/card.c
@@ -0,0 +1,458 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * card.c - contains functions for managing groups of PnP devices
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include <linux/dma-mapping.h>
+#include "base.h"
+
+LIST_HEAD(pnp_cards);
+static LIST_HEAD(pnp_card_drivers);
+
+static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
+						   struct pnp_card *card)
+{
+	const struct pnp_card_device_id *drv_id = drv->id_table;
+
+	while (*drv_id->id) {
+		if (compare_pnp_id(card->id, drv_id->id)) {
+			int i = 0;
+
+			for (;;) {
+				int found;
+				struct pnp_dev *dev;
+
+				if (i == PNP_MAX_DEVICES ||
+				    !*drv_id->devs[i].id)
+					return drv_id;
+				found = 0;
+				card_for_each_dev(card, dev) {
+					if (compare_pnp_id(dev->id,
+						   drv_id->devs[i].id)) {
+						found = 1;
+						break;
+					}
+				}
+				if (!found)
+					break;
+				i++;
+			}
+		}
+		drv_id++;
+	}
+	return NULL;
+}
+
+static void card_remove(struct pnp_dev *dev)
+{
+	dev->card_link = NULL;
+}
+
+static void card_remove_first(struct pnp_dev *dev)
+{
+	struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
+
+	if (!dev->card || !drv)
+		return;
+	if (drv->remove)
+		drv->remove(dev->card_link);
+	drv->link.remove = &card_remove;
+	kfree(dev->card_link);
+	card_remove(dev);
+}
+
+static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
+{
+	const struct pnp_card_device_id *id;
+	struct pnp_card_link *clink;
+	struct pnp_dev *dev;
+
+	if (!drv->probe)
+		return 0;
+	id = match_card(drv, card);
+	if (!id)
+		return 0;
+
+	clink = pnp_alloc(sizeof(*clink));
+	if (!clink)
+		return 0;
+	clink->card = card;
+	clink->driver = drv;
+	clink->pm_state = PMSG_ON;
+
+	if (drv->probe(clink, id) >= 0)
+		return 1;
+
+	/* Recovery */
+	card_for_each_dev(card, dev) {
+		if (dev->card_link == clink)
+			pnp_release_card_device(dev);
+	}
+	kfree(clink);
+	return 0;
+}
+
+/**
+ * pnp_add_card_id - adds an EISA id to the specified card
+ * @id: pointer to a pnp_id structure
+ * @card: pointer to the desired card
+ */
+static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
+{
+	struct pnp_id *dev_id, *ptr;
+
+	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	if (!dev_id)
+		return NULL;
+
+	dev_id->id[0] = id[0];
+	dev_id->id[1] = id[1];
+	dev_id->id[2] = id[2];
+	dev_id->id[3] = tolower(id[3]);
+	dev_id->id[4] = tolower(id[4]);
+	dev_id->id[5] = tolower(id[5]);
+	dev_id->id[6] = tolower(id[6]);
+	dev_id->id[7] = '\0';
+
+	dev_id->next = NULL;
+	ptr = card->id;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = dev_id;
+	else
+		card->id = dev_id;
+
+	return dev_id;
+}
+
+static void pnp_free_card_ids(struct pnp_card *card)
+{
+	struct pnp_id *id;
+	struct pnp_id *next;
+
+	id = card->id;
+	while (id) {
+		next = id->next;
+		kfree(id);
+		id = next;
+	}
+}
+
+static void pnp_release_card(struct device *dmdev)
+{
+	struct pnp_card *card = to_pnp_card(dmdev);
+
+	pnp_free_card_ids(card);
+	kfree(card);
+}
+
+struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid)
+{
+	struct pnp_card *card;
+	struct pnp_id *dev_id;
+
+	card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL);
+	if (!card)
+		return NULL;
+
+	card->protocol = protocol;
+	card->number = id;
+
+	card->dev.parent = &card->protocol->dev;
+	dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number);
+
+	card->dev.coherent_dma_mask = DMA_BIT_MASK(24);
+	card->dev.dma_mask = &card->dev.coherent_dma_mask;
+
+	dev_id = pnp_add_card_id(card, pnpid);
+	if (!dev_id) {
+		kfree(card);
+		return NULL;
+	}
+
+	return card;
+}
+
+static ssize_t pnp_show_card_name(struct device *dmdev,
+				  struct device_attribute *attr, char *buf)
+{
+	char *str = buf;
+	struct pnp_card *card = to_pnp_card(dmdev);
+
+	str += sprintf(str, "%s\n", card->name);
+	return (str - buf);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
+
+static ssize_t pnp_show_card_ids(struct device *dmdev,
+				 struct device_attribute *attr, char *buf)
+{
+	char *str = buf;
+	struct pnp_card *card = to_pnp_card(dmdev);
+	struct pnp_id *pos = card->id;
+
+	while (pos) {
+		str += sprintf(str, "%s\n", pos->id);
+		pos = pos->next;
+	}
+	return (str - buf);
+}
+
+static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
+
+static int pnp_interface_attach_card(struct pnp_card *card)
+{
+	int rc = device_create_file(&card->dev, &dev_attr_name);
+
+	if (rc)
+		return rc;
+
+	rc = device_create_file(&card->dev, &dev_attr_card_id);
+	if (rc)
+		goto err_name;
+
+	return 0;
+
+err_name:
+	device_remove_file(&card->dev, &dev_attr_name);
+	return rc;
+}
+
+/**
+ * pnp_add_card - adds a PnP card to the PnP Layer
+ * @card: pointer to the card to add
+ */
+int pnp_add_card(struct pnp_card *card)
+{
+	int error;
+	struct list_head *pos, *temp;
+
+	card->dev.bus = NULL;
+	card->dev.release = &pnp_release_card;
+	error = device_register(&card->dev);
+	if (error) {
+		dev_err(&card->dev, "could not register (err=%d)\n", error);
+		put_device(&card->dev);
+		return error;
+	}
+
+	pnp_interface_attach_card(card);
+	mutex_lock(&pnp_lock);
+	list_add_tail(&card->global_list, &pnp_cards);
+	list_add_tail(&card->protocol_list, &card->protocol->cards);
+	mutex_unlock(&pnp_lock);
+
+	/* we wait until now to add devices in order to ensure the drivers
+	 * will be able to use all of the related devices on the card
+	 * without waiting an unreasonable length of time */
+	list_for_each(pos, &card->devices) {
+		struct pnp_dev *dev = card_to_pnp_dev(pos);
+		__pnp_add_device(dev);
+	}
+
+	/* match with card drivers */
+	list_for_each_safe(pos, temp, &pnp_card_drivers) {
+		struct pnp_card_driver *drv =
+		    list_entry(pos, struct pnp_card_driver,
+			       global_list);
+		card_probe(card, drv);
+	}
+	return 0;
+}
+
+/**
+ * pnp_remove_card - removes a PnP card from the PnP Layer
+ * @card: pointer to the card to remove
+ */
+void pnp_remove_card(struct pnp_card *card)
+{
+	struct list_head *pos, *temp;
+
+	device_unregister(&card->dev);
+	mutex_lock(&pnp_lock);
+	list_del(&card->global_list);
+	list_del(&card->protocol_list);
+	mutex_unlock(&pnp_lock);
+	list_for_each_safe(pos, temp, &card->devices) {
+		struct pnp_dev *dev = card_to_pnp_dev(pos);
+		pnp_remove_card_device(dev);
+	}
+}
+
+/**
+ * pnp_add_card_device - adds a device to the specified card
+ * @card: pointer to the card to add to
+ * @dev: pointer to the device to add
+ */
+int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
+{
+	dev->dev.parent = &card->dev;
+	dev->card_link = NULL;
+	dev_set_name(&dev->dev, "%02x:%02x.%02x",
+		     dev->protocol->number, card->number, dev->number);
+	mutex_lock(&pnp_lock);
+	dev->card = card;
+	list_add_tail(&dev->card_list, &card->devices);
+	mutex_unlock(&pnp_lock);
+	return 0;
+}
+
+/**
+ * pnp_remove_card_device- removes a device from the specified card
+ * @dev: pointer to the device to remove
+ */
+void pnp_remove_card_device(struct pnp_dev *dev)
+{
+	mutex_lock(&pnp_lock);
+	dev->card = NULL;
+	list_del(&dev->card_list);
+	mutex_unlock(&pnp_lock);
+	__pnp_remove_device(dev);
+}
+
+/**
+ * pnp_request_card_device - Searches for a PnP device under the specified card
+ * @clink: pointer to the card link, cannot be NULL
+ * @id: pointer to a PnP ID structure that explains the rules for finding the device
+ * @from: Starting place to search from. If NULL it will start from the beginning.
+ */
+struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
+					const char *id, struct pnp_dev *from)
+{
+	struct list_head *pos;
+	struct pnp_dev *dev;
+	struct pnp_card_driver *drv;
+	struct pnp_card *card;
+
+	if (!clink || !id)
+		return NULL;
+
+	card = clink->card;
+	drv = clink->driver;
+	if (!from) {
+		pos = card->devices.next;
+	} else {
+		if (from->card != card)
+			return NULL;
+		pos = from->card_list.next;
+	}
+	while (pos != &card->devices) {
+		dev = card_to_pnp_dev(pos);
+		if ((!dev->card_link) && compare_pnp_id(dev->id, id))
+			goto found;
+		pos = pos->next;
+	}
+
+	return NULL;
+
+found:
+	dev->card_link = clink;
+	dev->dev.driver = &drv->link.driver;
+	if (pnp_bus_type.probe(&dev->dev))
+		goto err_out;
+	if (device_bind_driver(&dev->dev))
+		goto err_out;
+
+	return dev;
+
+err_out:
+	dev->dev.driver = NULL;
+	dev->card_link = NULL;
+	return NULL;
+}
+
+/**
+ * pnp_release_card_device - call this when the driver no longer needs the device
+ * @dev: pointer to the PnP device structure
+ */
+void pnp_release_card_device(struct pnp_dev *dev)
+{
+	struct pnp_card_driver *drv = dev->card_link->driver;
+
+	drv->link.remove = &card_remove;
+	device_release_driver(&dev->dev);
+	drv->link.remove = &card_remove_first;
+}
+
+/*
+ * suspend/resume callbacks
+ */
+static int card_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+	struct pnp_card_link *link = dev->card_link;
+
+	if (link->pm_state.event == state.event)
+		return 0;
+	link->pm_state = state;
+	return link->driver->suspend(link, state);
+}
+
+static int card_resume(struct pnp_dev *dev)
+{
+	struct pnp_card_link *link = dev->card_link;
+
+	if (link->pm_state.event == PM_EVENT_ON)
+		return 0;
+	link->pm_state = PMSG_ON;
+	link->driver->resume(link);
+	return 0;
+}
+
+/**
+ * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
+ * @drv: pointer to the driver to register
+ */
+int pnp_register_card_driver(struct pnp_card_driver *drv)
+{
+	int error;
+	struct list_head *pos, *temp;
+
+	drv->link.name = drv->name;
+	drv->link.id_table = NULL;	/* this will disable auto matching */
+	drv->link.flags = drv->flags;
+	drv->link.probe = NULL;
+	drv->link.remove = &card_remove_first;
+	drv->link.suspend = drv->suspend ? card_suspend : NULL;
+	drv->link.resume = drv->resume ? card_resume : NULL;
+
+	error = pnp_register_driver(&drv->link);
+	if (error < 0)
+		return error;
+
+	mutex_lock(&pnp_lock);
+	list_add_tail(&drv->global_list, &pnp_card_drivers);
+	mutex_unlock(&pnp_lock);
+
+	list_for_each_safe(pos, temp, &pnp_cards) {
+		struct pnp_card *card =
+		    list_entry(pos, struct pnp_card, global_list);
+		card_probe(card, drv);
+	}
+	return 0;
+}
+
+/**
+ * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
+ * @drv: pointer to the driver to unregister
+ */
+void pnp_unregister_card_driver(struct pnp_card_driver *drv)
+{
+	mutex_lock(&pnp_lock);
+	list_del(&drv->global_list);
+	mutex_unlock(&pnp_lock);
+	pnp_unregister_driver(&drv->link);
+}
+
+EXPORT_SYMBOL(pnp_request_card_device);
+EXPORT_SYMBOL(pnp_release_card_device);
+EXPORT_SYMBOL(pnp_register_card_driver);
+EXPORT_SYMBOL(pnp_unregister_card_driver);
diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c
new file mode 100644
index 000000000..14bf75ba9
--- /dev/null
+++ b/drivers/pnp/core.c
@@ -0,0 +1,253 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * core.c - contains all core device and protocol registration functions
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/dma-mapping.h>
+
+#include "base.h"
+
+static LIST_HEAD(pnp_protocols);
+LIST_HEAD(pnp_global);
+DEFINE_MUTEX(pnp_lock);
+
+/*
+ * ACPI or PNPBIOS should tell us about all platform devices, so we can
+ * skip some blind probes.  ISAPNP typically enumerates only plug-in ISA
+ * devices, not built-in things like COM ports.
+ */
+int pnp_platform_devices;
+EXPORT_SYMBOL(pnp_platform_devices);
+
+void *pnp_alloc(long size)
+{
+	void *result;
+
+	result = kzalloc(size, GFP_KERNEL);
+	if (!result) {
+		printk(KERN_ERR "pnp: Out of Memory\n");
+		return NULL;
+	}
+	return result;
+}
+
+static void pnp_remove_protocol(struct pnp_protocol *protocol)
+{
+	mutex_lock(&pnp_lock);
+	list_del(&protocol->protocol_list);
+	mutex_unlock(&pnp_lock);
+}
+
+/**
+ * pnp_register_protocol - adds a pnp protocol to the pnp layer
+ * @protocol: pointer to the corresponding pnp_protocol structure
+ *
+ *  Ex protocols: ISAPNP, PNPBIOS, etc
+ */
+int pnp_register_protocol(struct pnp_protocol *protocol)
+{
+	struct list_head *pos;
+	int nodenum, ret;
+
+	INIT_LIST_HEAD(&protocol->devices);
+	INIT_LIST_HEAD(&protocol->cards);
+	nodenum = 0;
+
+	mutex_lock(&pnp_lock);
+
+	/* assign the lowest unused number */
+	list_for_each(pos, &pnp_protocols) {
+		struct pnp_protocol *cur = to_pnp_protocol(pos);
+		if (cur->number == nodenum) {
+			pos = &pnp_protocols;
+			nodenum++;
+		}
+	}
+
+	protocol->number = nodenum;
+	dev_set_name(&protocol->dev, "pnp%d", nodenum);
+
+	list_add_tail(&protocol->protocol_list, &pnp_protocols);
+
+	mutex_unlock(&pnp_lock);
+
+	ret = device_register(&protocol->dev);
+	if (ret)
+		pnp_remove_protocol(protocol);
+
+	return ret;
+}
+
+/**
+ * pnp_unregister_protocol - removes a pnp protocol from the pnp layer
+ * @protocol: pointer to the corresponding pnp_protocol structure
+ */
+void pnp_unregister_protocol(struct pnp_protocol *protocol)
+{
+	pnp_remove_protocol(protocol);
+	device_unregister(&protocol->dev);
+}
+
+static void pnp_free_ids(struct pnp_dev *dev)
+{
+	struct pnp_id *id;
+	struct pnp_id *next;
+
+	id = dev->id;
+	while (id) {
+		next = id->next;
+		kfree(id);
+		id = next;
+	}
+}
+
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+	list_del(&pnp_res->list);
+	kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res, *tmp;
+
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		pnp_free_resource(pnp_res);
+	}
+}
+
+static void pnp_release_device(struct device *dmdev)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+
+	pnp_free_ids(dev);
+	pnp_free_resources(dev);
+	pnp_free_options(dev);
+	kfree(dev);
+}
+
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
+			      const char *pnpid)
+{
+	struct pnp_dev *dev;
+	struct pnp_id *dev_id;
+
+	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+
+	INIT_LIST_HEAD(&dev->resources);
+	INIT_LIST_HEAD(&dev->options);
+	dev->protocol = protocol;
+	dev->number = id;
+	dev->dma_mask = DMA_BIT_MASK(24);
+
+	dev->dev.parent = &dev->protocol->dev;
+	dev->dev.bus = &pnp_bus_type;
+	dev->dev.dma_mask = &dev->dma_mask;
+	dev->dev.coherent_dma_mask = dev->dma_mask;
+	dev->dev.release = &pnp_release_device;
+
+	dev_id = pnp_add_id(dev, pnpid);
+	if (!dev_id) {
+		kfree(dev);
+		return NULL;
+	}
+
+	dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
+
+	return dev;
+}
+
+static void pnp_delist_device(struct pnp_dev *dev)
+{
+	mutex_lock(&pnp_lock);
+	list_del(&dev->global_list);
+	list_del(&dev->protocol_list);
+	mutex_unlock(&pnp_lock);
+}
+
+int __pnp_add_device(struct pnp_dev *dev)
+{
+	int ret;
+
+	pnp_fixup_device(dev);
+	dev->status = PNP_READY;
+
+	mutex_lock(&pnp_lock);
+
+	list_add_tail(&dev->global_list, &pnp_global);
+	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
+
+	mutex_unlock(&pnp_lock);
+
+	ret = device_register(&dev->dev);
+	if (ret)
+		pnp_delist_device(dev);
+	else if (dev->protocol->can_wakeup)
+		device_set_wakeup_capable(&dev->dev,
+				dev->protocol->can_wakeup(dev));
+
+	return ret;
+}
+
+/*
+ * pnp_add_device - adds a pnp device to the pnp layer
+ * @dev: pointer to dev to add
+ *
+ *  adds to driver model, name database, fixups, interface, etc.
+ */
+int pnp_add_device(struct pnp_dev *dev)
+{
+	int ret;
+	char buf[128];
+	int len = 0;
+	struct pnp_id *id;
+
+	if (dev->card)
+		return -EINVAL;
+
+	ret = __pnp_add_device(dev);
+	if (ret)
+		return ret;
+
+	buf[0] = '\0';
+	for (id = dev->id; id; id = id->next)
+		len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
+		   dev->protocol->name, buf,
+		   dev->active ? "active" : "disabled");
+	return 0;
+}
+
+void __pnp_remove_device(struct pnp_dev *dev)
+{
+	pnp_delist_device(dev);
+	device_unregister(&dev->dev);
+}
+
+static int __init pnp_init(void)
+{
+	return bus_register(&pnp_bus_type);
+}
+
+subsys_initcall(pnp_init);
+
+int pnp_debug;
+
+#if defined(CONFIG_PNP_DEBUG_MESSAGES)
+module_param_named(debug, pnp_debug, int, 0644);
+#endif
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
new file mode 100644
index 000000000..93a30a8f8
--- /dev/null
+++ b/drivers/pnp/driver.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * driver.c - device id matching, driver model, etc.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include "base.h"
+
+static int compare_func(const char *ida, const char *idb)
+{
+	int i;
+
+	/* we only need to compare the last 4 chars */
+	for (i = 3; i < 7; i++) {
+		if (ida[i] != 'X' &&
+		    idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
+			return 0;
+	}
+	return 1;
+}
+
+int compare_pnp_id(struct pnp_id *pos, const char *id)
+{
+	if (!pos || !id || (strlen(id) != 7))
+		return 0;
+	if (memcmp(id, "ANYDEVS", 7) == 0)
+		return 1;
+	while (pos) {
+		if (memcmp(pos->id, id, 3) == 0)
+			if (compare_func(pos->id, id) == 1)
+				return 1;
+		pos = pos->next;
+	}
+	return 0;
+}
+
+static const struct pnp_device_id *match_device(struct pnp_driver *drv,
+						struct pnp_dev *dev)
+{
+	const struct pnp_device_id *drv_id = drv->id_table;
+
+	if (!drv_id)
+		return NULL;
+
+	while (*drv_id->id) {
+		if (compare_pnp_id(dev->id, drv_id->id))
+			return drv_id;
+		drv_id++;
+	}
+	return NULL;
+}
+
+int pnp_device_attach(struct pnp_dev *pnp_dev)
+{
+	mutex_lock(&pnp_lock);
+	if (pnp_dev->status != PNP_READY) {
+		mutex_unlock(&pnp_lock);
+		return -EBUSY;
+	}
+	pnp_dev->status = PNP_ATTACHED;
+	mutex_unlock(&pnp_lock);
+	return 0;
+}
+
+void pnp_device_detach(struct pnp_dev *pnp_dev)
+{
+	mutex_lock(&pnp_lock);
+	if (pnp_dev->status == PNP_ATTACHED)
+		pnp_dev->status = PNP_READY;
+	mutex_unlock(&pnp_lock);
+}
+
+static int pnp_device_probe(struct device *dev)
+{
+	int error;
+	struct pnp_driver *pnp_drv;
+	struct pnp_dev *pnp_dev;
+	const struct pnp_device_id *dev_id = NULL;
+	pnp_dev = to_pnp_dev(dev);
+	pnp_drv = to_pnp_driver(dev->driver);
+
+	error = pnp_device_attach(pnp_dev);
+	if (error < 0)
+		return error;
+
+	if (pnp_dev->active == 0) {
+		if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
+			error = pnp_activate_dev(pnp_dev);
+			if (error < 0)
+				return error;
+		}
+	} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
+		   == PNP_DRIVER_RES_DISABLE) {
+		error = pnp_disable_dev(pnp_dev);
+		if (error < 0)
+			return error;
+	}
+	error = 0;
+	if (pnp_drv->probe) {
+		dev_id = match_device(pnp_drv, pnp_dev);
+		if (dev_id != NULL)
+			error = pnp_drv->probe(pnp_dev, dev_id);
+	}
+	if (error >= 0) {
+		pnp_dev->driver = pnp_drv;
+		error = 0;
+	} else
+		goto fail;
+
+	return error;
+
+fail:
+	pnp_device_detach(pnp_dev);
+	return error;
+}
+
+static int pnp_device_remove(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *drv = pnp_dev->driver;
+
+	if (drv) {
+		if (drv->remove)
+			drv->remove(pnp_dev);
+		pnp_dev->driver = NULL;
+	}
+
+	if (pnp_dev->active &&
+	    (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))
+		pnp_disable_dev(pnp_dev);
+
+	pnp_device_detach(pnp_dev);
+	return 0;
+}
+
+static void pnp_device_shutdown(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *drv = pnp_dev->driver;
+
+	if (drv && drv->shutdown)
+		drv->shutdown(pnp_dev);
+}
+
+static int pnp_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = to_pnp_driver(drv);
+
+	if (match_device(pnp_drv, pnp_dev) == NULL)
+		return 0;
+	return 1;
+}
+
+static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
+		error = pnp_drv->driver.pm->suspend(dev);
+		suspend_report_result(pnp_drv->driver.pm->suspend, error);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->suspend) {
+		error = pnp_drv->suspend(pnp_dev, state);
+		if (error)
+			return error;
+	}
+
+	if (pnp_can_disable(pnp_dev)) {
+		error = pnp_stop_dev(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_can_suspend(pnp_dev))
+		pnp_dev->protocol->suspend(pnp_dev, state);
+	return 0;
+}
+
+static int pnp_bus_suspend(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_SUSPEND);
+}
+
+static int pnp_bus_freeze(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_FREEZE);
+}
+
+static int pnp_bus_poweroff(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
+}
+
+static int pnp_bus_resume(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (pnp_dev->protocol->resume) {
+		error = pnp_dev->protocol->resume(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_can_write(pnp_dev)) {
+		error = pnp_start_dev(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
+		error = pnp_drv->driver.pm->resume(dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->resume) {
+		error = pnp_drv->resume(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
+	/* Suspend callbacks */
+	.suspend = pnp_bus_suspend,
+	.resume = pnp_bus_resume,
+	/* Hibernate callbacks */
+	.freeze = pnp_bus_freeze,
+	.thaw = pnp_bus_resume,
+	.poweroff = pnp_bus_poweroff,
+	.restore = pnp_bus_resume,
+};
+
+struct bus_type pnp_bus_type = {
+	.name    = "pnp",
+	.match   = pnp_bus_match,
+	.probe   = pnp_device_probe,
+	.remove  = pnp_device_remove,
+	.shutdown = pnp_device_shutdown,
+	.pm	 = &pnp_bus_dev_pm_ops,
+	.dev_groups = pnp_dev_groups,
+};
+
+int pnp_register_driver(struct pnp_driver *drv)
+{
+	drv->driver.name = drv->name;
+	drv->driver.bus = &pnp_bus_type;
+
+	return driver_register(&drv->driver);
+}
+
+void pnp_unregister_driver(struct pnp_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+
+/**
+ * pnp_add_id - adds an EISA id to the specified device
+ * @dev: pointer to the desired device
+ * @id: pointer to an EISA id string
+ */
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
+{
+	struct pnp_id *dev_id, *ptr;
+
+	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	if (!dev_id)
+		return NULL;
+
+	dev_id->id[0] = id[0];
+	dev_id->id[1] = id[1];
+	dev_id->id[2] = id[2];
+	dev_id->id[3] = tolower(id[3]);
+	dev_id->id[4] = tolower(id[4]);
+	dev_id->id[5] = tolower(id[5]);
+	dev_id->id[6] = tolower(id[6]);
+	dev_id->id[7] = '\0';
+
+	dev_id->next = NULL;
+	ptr = dev->id;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = dev_id;
+	else
+		dev->id = dev_id;
+
+	return dev_id;
+}
+
+EXPORT_SYMBOL(pnp_register_driver);
+EXPORT_SYMBOL(pnp_unregister_driver);
+EXPORT_SYMBOL(pnp_device_attach);
+EXPORT_SYMBOL(pnp_device_detach);
diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
new file mode 100644
index 000000000..187e4a117
--- /dev/null
+++ b/drivers/pnp/interface.c
@@ -0,0 +1,469 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * interface.c - contains everything related to the user interface
+ *
+ * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+
+#include <linux/uaccess.h>
+
+#include "base.h"
+
+struct pnp_info_buffer {
+	char *buffer;		/* pointer to begin of buffer */
+	char *curr;		/* current position in buffer */
+	unsigned long size;	/* current size */
+	unsigned long len;	/* total length of buffer */
+	int stop;		/* stop flag */
+	int error;		/* error code */
+};
+
+typedef struct pnp_info_buffer pnp_info_buffer_t;
+
+static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
+{
+	va_list args;
+	int res;
+
+	if (buffer->stop || buffer->error)
+		return 0;
+	va_start(args, fmt);
+	res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
+	va_end(args);
+	if (buffer->size + res >= buffer->len) {
+		buffer->stop = 1;
+		return 0;
+	}
+	buffer->curr += res;
+	buffer->size += res;
+	return res;
+}
+
+static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
+			   struct pnp_port *port)
+{
+	pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
+		   "%i-bit address decoding\n", space,
+		   (unsigned long long) port->min,
+		   (unsigned long long) port->max,
+		   port->align ? ((unsigned long long) port->align - 1) : 0,
+		   (unsigned long long) port->size,
+		   port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
+}
+
+static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_irq *irq)
+{
+	int first = 1, i;
+
+	pnp_printf(buffer, "%sirq ", space);
+	for (i = 0; i < PNP_IRQ_NR; i++)
+		if (test_bit(i, irq->map.bits)) {
+			if (!first) {
+				pnp_printf(buffer, ",");
+			} else {
+				first = 0;
+			}
+			if (i == 2 || i == 9)
+				pnp_printf(buffer, "2/9");
+			else
+				pnp_printf(buffer, "%i", i);
+		}
+	if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+		pnp_printf(buffer, "<none>");
+	if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
+		pnp_printf(buffer, " High-Edge");
+	if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
+		pnp_printf(buffer, " Low-Edge");
+	if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
+		pnp_printf(buffer, " High-Level");
+	if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
+		pnp_printf(buffer, " Low-Level");
+	if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+		pnp_printf(buffer, " (optional)");
+	pnp_printf(buffer, "\n");
+}
+
+static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_dma *dma)
+{
+	int first = 1, i;
+	char *s;
+
+	pnp_printf(buffer, "%sdma ", space);
+	for (i = 0; i < 8; i++)
+		if (dma->map & (1 << i)) {
+			if (!first) {
+				pnp_printf(buffer, ",");
+			} else {
+				first = 0;
+			}
+			pnp_printf(buffer, "%i", i);
+		}
+	if (!dma->map)
+		pnp_printf(buffer, "<none>");
+	switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
+	case IORESOURCE_DMA_8BIT:
+		s = "8-bit";
+		break;
+	case IORESOURCE_DMA_8AND16BIT:
+		s = "8-bit&16-bit";
+		break;
+	default:
+		s = "16-bit";
+	}
+	pnp_printf(buffer, " %s", s);
+	if (dma->flags & IORESOURCE_DMA_MASTER)
+		pnp_printf(buffer, " master");
+	if (dma->flags & IORESOURCE_DMA_BYTE)
+		pnp_printf(buffer, " byte-count");
+	if (dma->flags & IORESOURCE_DMA_WORD)
+		pnp_printf(buffer, " word-count");
+	switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
+	case IORESOURCE_DMA_TYPEA:
+		s = "type-A";
+		break;
+	case IORESOURCE_DMA_TYPEB:
+		s = "type-B";
+		break;
+	case IORESOURCE_DMA_TYPEF:
+		s = "type-F";
+		break;
+	default:
+		s = "compatible";
+		break;
+	}
+	pnp_printf(buffer, " %s\n", s);
+}
+
+static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_mem *mem)
+{
+	char *s;
+
+	pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
+		   space, (unsigned long long) mem->min,
+		   (unsigned long long) mem->max,
+		   (unsigned long long) mem->align,
+		   (unsigned long long) mem->size);
+	if (mem->flags & IORESOURCE_MEM_WRITEABLE)
+		pnp_printf(buffer, ", writeable");
+	if (mem->flags & IORESOURCE_MEM_CACHEABLE)
+		pnp_printf(buffer, ", cacheable");
+	if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
+		pnp_printf(buffer, ", range-length");
+	if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
+		pnp_printf(buffer, ", shadowable");
+	if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
+		pnp_printf(buffer, ", expansion ROM");
+	switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+	case IORESOURCE_MEM_8BIT:
+		s = "8-bit";
+		break;
+	case IORESOURCE_MEM_8AND16BIT:
+		s = "8-bit&16-bit";
+		break;
+	case IORESOURCE_MEM_32BIT:
+		s = "32-bit";
+		break;
+	default:
+		s = "16-bit";
+	}
+	pnp_printf(buffer, ", %s\n", s);
+}
+
+static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
+			     struct pnp_option *option)
+{
+	switch (option->type) {
+	case IORESOURCE_IO:
+		pnp_print_port(buffer, space, &option->u.port);
+		break;
+	case IORESOURCE_MEM:
+		pnp_print_mem(buffer, space, &option->u.mem);
+		break;
+	case IORESOURCE_IRQ:
+		pnp_print_irq(buffer, space, &option->u.irq);
+		break;
+	case IORESOURCE_DMA:
+		pnp_print_dma(buffer, space, &option->u.dma);
+		break;
+	}
+}
+
+static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	pnp_info_buffer_t *buffer;
+	struct pnp_option *option;
+	int ret, dep = 0, set = 0;
+	char *indent;
+
+	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->len = PAGE_SIZE;
+	buffer->buffer = buf;
+	buffer->curr = buffer->buffer;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option)) {
+			indent = "  ";
+			if (!dep || pnp_option_set(option) != set) {
+				set = pnp_option_set(option);
+				dep = 1;
+				pnp_printf(buffer, "Dependent: %02i - "
+					   "Priority %s\n", set,
+					   pnp_option_priority_name(option));
+			}
+		} else {
+			dep = 0;
+			indent = "";
+		}
+		pnp_print_option(buffer, indent, option);
+	}
+
+	ret = (buffer->curr - buf);
+	kfree(buffer);
+	return ret;
+}
+static DEVICE_ATTR_RO(options);
+
+static ssize_t resources_show(struct device *dmdev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	pnp_info_buffer_t *buffer;
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+	int ret;
+
+	if (!dev)
+		return -EINVAL;
+
+	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->len = PAGE_SIZE;
+	buffer->buffer = buf;
+	buffer->curr = buffer->buffer;
+
+	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+
+		pnp_printf(buffer, pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
+			pnp_printf(buffer, " disabled\n");
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+		case IORESOURCE_BUS:
+			pnp_printf(buffer, " %#llx-%#llx%s\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end,
+				   res->flags & IORESOURCE_WINDOW ?
+					" window" : "");
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
+			break;
+		}
+	}
+
+	ret = (buffer->curr - buf);
+	kfree(buffer);
+	return ret;
+}
+
+static char *pnp_get_resource_value(char *buf,
+				    unsigned long type,
+				    resource_size_t *start,
+				    resource_size_t *end,
+				    unsigned long *flags)
+{
+	if (start)
+		*start = 0;
+	if (end)
+		*end = 0;
+	if (flags)
+		*flags = 0;
+
+	/* TBD: allow for disabled resources */
+
+	buf = skip_spaces(buf);
+	if (start) {
+		*start = simple_strtoull(buf, &buf, 0);
+		if (end) {
+			buf = skip_spaces(buf);
+			if (*buf == '-') {
+				buf = skip_spaces(buf + 1);
+				*end = simple_strtoull(buf, &buf, 0);
+			} else
+				*end = *start;
+		}
+	}
+
+	/* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
+
+	return buf;
+}
+
+static ssize_t resources_store(struct device *dmdev,
+			       struct device_attribute *attr, const char *ubuf,
+			       size_t count)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	char *buf = (void *)ubuf;
+	int retval = 0;
+
+	if (dev->status & PNP_ATTACHED) {
+		retval = -EBUSY;
+		dev_info(&dev->dev, "in use; can't configure\n");
+		goto done;
+	}
+
+	buf = skip_spaces(buf);
+	if (!strncasecmp(buf, "disable", 7)) {
+		retval = pnp_disable_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "activate", 8)) {
+		retval = pnp_activate_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "fill", 4)) {
+		if (dev->active)
+			goto done;
+		retval = pnp_auto_config_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "auto", 4)) {
+		if (dev->active)
+			goto done;
+		pnp_init_resources(dev);
+		retval = pnp_auto_config_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "clear", 5)) {
+		if (dev->active)
+			goto done;
+		pnp_init_resources(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "get", 3)) {
+		mutex_lock(&pnp_res_mutex);
+		if (pnp_can_read(dev))
+			dev->protocol->get(dev);
+		mutex_unlock(&pnp_res_mutex);
+		goto done;
+	}
+	if (!strncasecmp(buf, "set", 3)) {
+		resource_size_t start;
+		resource_size_t end;
+		unsigned long flags;
+
+		if (dev->active)
+			goto done;
+		buf += 3;
+		pnp_init_resources(dev);
+		mutex_lock(&pnp_res_mutex);
+		while (1) {
+			buf = skip_spaces(buf);
+			if (!strncasecmp(buf, "io", 2)) {
+				buf = pnp_get_resource_value(buf + 2,
+							     IORESOURCE_IO,
+							     &start, &end,
+							     &flags);
+				pnp_add_io_resource(dev, start, end, flags);
+			} else if (!strncasecmp(buf, "mem", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_MEM,
+							     &start, &end,
+							     &flags);
+				pnp_add_mem_resource(dev, start, end, flags);
+			} else if (!strncasecmp(buf, "irq", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_IRQ,
+							     &start, NULL,
+							     &flags);
+				pnp_add_irq_resource(dev, start, flags);
+			} else if (!strncasecmp(buf, "dma", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_DMA,
+							     &start, NULL,
+							     &flags);
+				pnp_add_dma_resource(dev, start, flags);
+			} else if (!strncasecmp(buf, "bus", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_BUS,
+							     &start, &end,
+							     NULL);
+				pnp_add_bus_resource(dev, start, end);
+			} else
+				break;
+		}
+		mutex_unlock(&pnp_res_mutex);
+		goto done;
+	}
+
+done:
+	if (retval < 0)
+		return retval;
+	return count;
+}
+static DEVICE_ATTR_RW(resources);
+
+static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,
+		       char *buf)
+{
+	char *str = buf;
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	struct pnp_id *pos = dev->id;
+
+	while (pos) {
+		str += sprintf(str, "%s\n", pos->id);
+		pos = pos->next;
+	}
+	return (str - buf);
+}
+static DEVICE_ATTR_RO(id);
+
+static struct attribute *pnp_dev_attrs[] = {
+	&dev_attr_resources.attr,
+	&dev_attr_options.attr,
+	&dev_attr_id.attr,
+	NULL,
+};
+
+static const struct attribute_group pnp_dev_group = {
+	.attrs = pnp_dev_attrs,
+};
+
+const struct attribute_group *pnp_dev_groups[] = {
+	&pnp_dev_group,
+	NULL,
+};
diff --git a/drivers/pnp/isapnp/Kconfig b/drivers/pnp/isapnp/Kconfig
new file mode 100644
index 000000000..d0479a563
--- /dev/null
+++ b/drivers/pnp/isapnp/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# ISA Plug and Play configuration
+#
+config ISAPNP
+	bool "ISA Plug and Play support"
+	depends on ISA || COMPILE_TEST
+	help
+	  Say Y here if you would like support for ISA Plug and Play devices.
+	  Some information is in <file:Documentation/driver-api/isapnp.rst>.
+
+	  If unsure, say Y.
diff --git a/drivers/pnp/isapnp/Makefile b/drivers/pnp/isapnp/Makefile
new file mode 100644
index 000000000..a0e0c0aec
--- /dev/null
+++ b/drivers/pnp/isapnp/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the kernel ISAPNP driver.
+#
+obj-y			+= pnp.o
+pnp-y			:= core.o compat.o
+
+pnp-$(CONFIG_PROC_FS)	+= proc.o
diff --git a/drivers/pnp/isapnp/compat.c b/drivers/pnp/isapnp/compat.c
new file mode 100644
index 000000000..035e95092
--- /dev/null
+++ b/drivers/pnp/isapnp/compat.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * compat.c - A series of functions to make it easier to convert drivers that use
+ *            the old isapnp APIs. If possible use the new APIs instead.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/string.h>
+
+static void pnp_convert_id(char *buf, unsigned short vendor,
+			   unsigned short device)
+{
+	sprintf(buf, "%c%c%c%x%x%x%x",
+		'A' + ((vendor >> 2) & 0x3f) - 1,
+		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+		'A' + ((vendor >> 8) & 0x1f) - 1,
+		(device >> 4) & 0x0f, device & 0x0f,
+		(device >> 12) & 0x0f, (device >> 8) & 0x0f);
+}
+
+struct pnp_dev *pnp_find_dev(struct pnp_card *card, unsigned short vendor,
+			     unsigned short function, struct pnp_dev *from)
+{
+	char id[8];
+	char any[8];
+
+	pnp_convert_id(id, vendor, function);
+	pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
+	if (card == NULL) {	/* look for a logical device from all cards */
+		struct list_head *list;
+
+		list = pnp_global.next;
+		if (from)
+			list = from->global_list.next;
+
+		while (list != &pnp_global) {
+			struct pnp_dev *dev = global_to_pnp_dev(list);
+
+			if (compare_pnp_id(dev->id, id) ||
+			    (memcmp(id, any, 7) == 0))
+				return dev;
+			list = list->next;
+		}
+	} else {
+		struct list_head *list;
+
+		list = card->devices.next;
+		if (from) {
+			list = from->card_list.next;
+			if (from->card != card)	/* something is wrong */
+				return NULL;
+		}
+		while (list != &card->devices) {
+			struct pnp_dev *dev = card_to_pnp_dev(list);
+
+			if (compare_pnp_id(dev->id, id))
+				return dev;
+			list = list->next;
+		}
+	}
+	return NULL;
+}
+
+EXPORT_SYMBOL(pnp_find_dev);
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
new file mode 100644
index 000000000..c43d8ad02
--- /dev/null
+++ b/drivers/pnp/isapnp/core.c
@@ -0,0 +1,1069 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  ISA Plug & Play support
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *  Changelog:
+ *  2000-01-01	Added quirks handling for buggy hardware
+ *		Peter Denison <peterd@pnd-pc.demon.co.uk>
+ *  2000-06-14	Added isapnp_probe_devs() and isapnp_activate_dev()
+ *		Christoph Hellwig <hch@infradead.org>
+ *  2001-06-03  Added release_region calls to correspond with
+ *		request_region calls when a failure occurs.  Also
+ *		added KERN_* constants to printk() calls.
+ *  2001-11-07  Added isapnp_{,un}register_driver calls along the lines
+ *              of the pci driver interface
+ *              Kai Germaschewski <kai.germaschewski@gmx.de>
+ *  2002-06-06  Made the use of dma channel 0 configurable
+ *              Gerald Teschl <gerald.teschl@univie.ac.at>
+ *  2002-10-06  Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
+ *  2003-08-11	Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/isapnp.h>
+#include <linux/mutex.h>
+#include <asm/io.h>
+
+#include "../base.h"
+
+#if 0
+#define ISAPNP_REGION_OK
+#endif
+
+int isapnp_disable;		/* Disable ISA PnP */
+static int isapnp_rdp;		/* Read Data Port */
+static int isapnp_reset = 1;	/* reset all PnP cards (deactivate) */
+static int isapnp_verbose = 1;	/* verbose mode */
+
+module_param(isapnp_disable, int, 0);
+MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
+module_param(isapnp_rdp, int, 0);
+MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
+module_param(isapnp_reset, int, 0);
+MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
+module_param(isapnp_verbose, int, 0);
+MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
+
+#define _PIDXR		0x279
+#define _PNPWRP		0xa79
+
+/* short tags */
+#define _STAG_PNPVERNO		0x01
+#define _STAG_LOGDEVID		0x02
+#define _STAG_COMPATDEVID	0x03
+#define _STAG_IRQ		0x04
+#define _STAG_DMA		0x05
+#define _STAG_STARTDEP		0x06
+#define _STAG_ENDDEP		0x07
+#define _STAG_IOPORT		0x08
+#define _STAG_FIXEDIO		0x09
+#define _STAG_VENDOR		0x0e
+#define _STAG_END		0x0f
+/* long tags */
+#define _LTAG_MEMRANGE		0x81
+#define _LTAG_ANSISTR		0x82
+#define _LTAG_UNICODESTR	0x83
+#define _LTAG_VENDOR		0x84
+#define _LTAG_MEM32RANGE	0x85
+#define _LTAG_FIXEDMEM32RANGE	0x86
+
+/* Logical device control and configuration registers */
+
+#define ISAPNP_CFG_ACTIVATE	0x30	/* byte */
+#define ISAPNP_CFG_MEM		0x40	/* 4 * dword */
+#define ISAPNP_CFG_PORT		0x60	/* 8 * word */
+#define ISAPNP_CFG_IRQ		0x70	/* 2 * word */
+#define ISAPNP_CFG_DMA		0x74	/* 2 * byte */
+
+/*
+ * Sizes of ISAPNP logical device configuration register sets.
+ * See PNP-ISA-v1.0a.pdf, Appendix A.
+ */
+#define ISAPNP_MAX_MEM		4
+#define ISAPNP_MAX_PORT		8
+#define ISAPNP_MAX_IRQ		2
+#define ISAPNP_MAX_DMA		2
+
+static unsigned char isapnp_checksum_value;
+static DEFINE_MUTEX(isapnp_cfg_mutex);
+static int isapnp_csn_count;
+
+/* some prototypes */
+
+static inline void write_data(unsigned char x)
+{
+	outb(x, _PNPWRP);
+}
+
+static inline void write_address(unsigned char x)
+{
+	outb(x, _PIDXR);
+	udelay(20);
+}
+
+static inline unsigned char read_data(void)
+{
+	unsigned char val = inb(isapnp_rdp);
+	return val;
+}
+
+unsigned char isapnp_read_byte(unsigned char idx)
+{
+	write_address(idx);
+	return read_data();
+}
+
+static unsigned short isapnp_read_word(unsigned char idx)
+{
+	unsigned short val;
+
+	val = isapnp_read_byte(idx);
+	val = (val << 8) + isapnp_read_byte(idx + 1);
+	return val;
+}
+
+void isapnp_write_byte(unsigned char idx, unsigned char val)
+{
+	write_address(idx);
+	write_data(val);
+}
+
+static void isapnp_write_word(unsigned char idx, unsigned short val)
+{
+	isapnp_write_byte(idx, val >> 8);
+	isapnp_write_byte(idx + 1, val);
+}
+
+static void isapnp_key(void)
+{
+	unsigned char code = 0x6a, msb;
+	int i;
+
+	mdelay(1);
+	write_address(0x00);
+	write_address(0x00);
+
+	write_address(code);
+
+	for (i = 1; i < 32; i++) {
+		msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
+		code = (code >> 1) | msb;
+		write_address(code);
+	}
+}
+
+/* place all pnp cards in wait-for-key state */
+static void isapnp_wait(void)
+{
+	isapnp_write_byte(0x02, 0x02);
+}
+
+static void isapnp_wake(unsigned char csn)
+{
+	isapnp_write_byte(0x03, csn);
+}
+
+static void isapnp_device(unsigned char logdev)
+{
+	isapnp_write_byte(0x07, logdev);
+}
+
+static void isapnp_activate(unsigned char logdev)
+{
+	isapnp_device(logdev);
+	isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
+	udelay(250);
+}
+
+static void isapnp_deactivate(unsigned char logdev)
+{
+	isapnp_device(logdev);
+	isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
+	udelay(500);
+}
+
+static void __init isapnp_peek(unsigned char *data, int bytes)
+{
+	int i, j;
+	unsigned char d = 0;
+
+	for (i = 1; i <= bytes; i++) {
+		for (j = 0; j < 20; j++) {
+			d = isapnp_read_byte(0x05);
+			if (d & 1)
+				break;
+			udelay(100);
+		}
+		if (!(d & 1)) {
+			if (data != NULL)
+				*data++ = 0xff;
+			continue;
+		}
+		d = isapnp_read_byte(0x04);	/* PRESDI */
+		isapnp_checksum_value += d;
+		if (data != NULL)
+			*data++ = d;
+	}
+}
+
+#define RDP_STEP	32	/* minimum is 4 */
+
+static int isapnp_next_rdp(void)
+{
+	int rdp = isapnp_rdp;
+	static int old_rdp = 0;
+
+	if (old_rdp) {
+		release_region(old_rdp, 1);
+		old_rdp = 0;
+	}
+	while (rdp <= 0x3ff) {
+		/*
+		 *      We cannot use NE2000 probe spaces for ISAPnP or we
+		 *      will lock up machines.
+		 */
+		if ((rdp < 0x280 || rdp > 0x380)
+		    && request_region(rdp, 1, "ISAPnP")) {
+			isapnp_rdp = rdp;
+			old_rdp = rdp;
+			return 0;
+		}
+		rdp += RDP_STEP;
+	}
+	return -1;
+}
+
+/* Set read port address */
+static inline void isapnp_set_rdp(void)
+{
+	isapnp_write_byte(0x00, isapnp_rdp >> 2);
+	udelay(100);
+}
+
+/*
+ *	Perform an isolation. The port selection code now tries to avoid
+ *	"dangerous to read" ports.
+ */
+static int __init isapnp_isolate_rdp_select(void)
+{
+	isapnp_wait();
+	isapnp_key();
+
+	/* Control: reset CSN and conditionally everything else too */
+	isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
+	mdelay(2);
+
+	isapnp_wait();
+	isapnp_key();
+	isapnp_wake(0x00);
+
+	if (isapnp_next_rdp() < 0) {
+		isapnp_wait();
+		return -1;
+	}
+
+	isapnp_set_rdp();
+	udelay(1000);
+	write_address(0x01);
+	udelay(1000);
+	return 0;
+}
+
+/*
+ *  Isolate (assign uniqued CSN) to all ISA PnP devices.
+ */
+static int __init isapnp_isolate(void)
+{
+	unsigned char checksum = 0x6a;
+	unsigned char chksum = 0x00;
+	unsigned char bit = 0x00;
+	int data;
+	int csn = 0;
+	int i;
+	int iteration = 1;
+
+	isapnp_rdp = 0x213;
+	if (isapnp_isolate_rdp_select() < 0)
+		return -1;
+
+	while (1) {
+		for (i = 1; i <= 64; i++) {
+			data = read_data() << 8;
+			udelay(250);
+			data = data | read_data();
+			udelay(250);
+			if (data == 0x55aa)
+				bit = 0x01;
+			checksum =
+			    ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
+			    | (checksum >> 1);
+			bit = 0x00;
+		}
+		for (i = 65; i <= 72; i++) {
+			data = read_data() << 8;
+			udelay(250);
+			data = data | read_data();
+			udelay(250);
+			if (data == 0x55aa)
+				chksum |= (1 << (i - 65));
+		}
+		if (checksum != 0x00 && checksum == chksum) {
+			csn++;
+
+			isapnp_write_byte(0x06, csn);
+			udelay(250);
+			iteration++;
+			isapnp_wake(0x00);
+			isapnp_set_rdp();
+			udelay(1000);
+			write_address(0x01);
+			udelay(1000);
+			goto __next;
+		}
+		if (iteration == 1) {
+			isapnp_rdp += RDP_STEP;
+			if (isapnp_isolate_rdp_select() < 0)
+				return -1;
+		} else if (iteration > 1) {
+			break;
+		}
+__next:
+		if (csn == 255)
+			break;
+		checksum = 0x6a;
+		chksum = 0x00;
+		bit = 0x00;
+	}
+	isapnp_wait();
+	isapnp_csn_count = csn;
+	return csn;
+}
+
+/*
+ *  Read one tag from stream.
+ */
+static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
+{
+	unsigned char tag, tmp[2];
+
+	isapnp_peek(&tag, 1);
+	if (tag == 0)		/* invalid tag */
+		return -1;
+	if (tag & 0x80) {	/* large item */
+		*type = tag;
+		isapnp_peek(tmp, 2);
+		*size = (tmp[1] << 8) | tmp[0];
+	} else {
+		*type = (tag >> 3) & 0x0f;
+		*size = tag & 0x07;
+	}
+	if (*type == 0xff && *size == 0xffff)	/* probably invalid data */
+		return -1;
+	return 0;
+}
+
+/*
+ *  Skip specified number of bytes from stream.
+ */
+static void __init isapnp_skip_bytes(int count)
+{
+	isapnp_peek(NULL, count);
+}
+
+/*
+ *  Parse logical device tag.
+ */
+static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
+						  int size, int number)
+{
+	unsigned char tmp[6];
+	struct pnp_dev *dev;
+	u32 eisa_id;
+	char id[8];
+
+	isapnp_peek(tmp, size);
+	eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24;
+	pnp_eisa_id_to_string(eisa_id, id);
+
+	dev = pnp_alloc_dev(&isapnp_protocol, number, id);
+	if (!dev)
+		return NULL;
+
+	dev->card = card;
+	dev->capabilities |= PNP_CONFIGURABLE;
+	dev->capabilities |= PNP_READ;
+	dev->capabilities |= PNP_WRITE;
+	dev->capabilities |= PNP_DISABLE;
+	pnp_init_resources(dev);
+	return dev;
+}
+
+/*
+ *  Add IRQ resource to resources list.
+ */
+static void __init isapnp_parse_irq_resource(struct pnp_dev *dev,
+					     unsigned int option_flags,
+					     int size)
+{
+	unsigned char tmp[3];
+	unsigned long bits;
+	pnp_irq_mask_t map;
+	unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
+
+	isapnp_peek(tmp, size);
+	bits = (tmp[1] << 8) | tmp[0];
+
+	bitmap_zero(map.bits, PNP_IRQ_NR);
+	bitmap_copy(map.bits, &bits, 16);
+
+	if (size > 2)
+		flags = tmp[2];
+
+	pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+/*
+ *  Add DMA resource to resources list.
+ */
+static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
+					     unsigned int option_flags,
+					     int size)
+{
+	unsigned char tmp[2];
+
+	isapnp_peek(tmp, size);
+	pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]);
+}
+
+/*
+ *  Add port resource to resources list.
+ */
+static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
+					      unsigned int option_flags,
+					      int size)
+{
+	unsigned char tmp[7];
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	isapnp_peek(tmp, size);
+	min = (tmp[2] << 8) | tmp[1];
+	max = (tmp[4] << 8) | tmp[3];
+	align = tmp[5];
+	len = tmp[6];
+	flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0;
+	pnp_register_port_resource(dev, option_flags,
+				   min, max, align, len, flags);
+}
+
+/*
+ *  Add fixed port resource to resources list.
+ */
+static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
+						    unsigned int option_flags,
+						    int size)
+{
+	unsigned char tmp[3];
+	resource_size_t base, len;
+
+	isapnp_peek(tmp, size);
+	base = (tmp[1] << 8) | tmp[0];
+	len = tmp[2];
+	pnp_register_port_resource(dev, option_flags, base, base, 0, len,
+				   IORESOURCE_IO_FIXED);
+}
+
+/*
+ *  Add memory resource to resources list.
+ */
+static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
+					     unsigned int option_flags,
+					     int size)
+{
+	unsigned char tmp[9];
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	isapnp_peek(tmp, size);
+	min = ((tmp[2] << 8) | tmp[1]) << 8;
+	max = ((tmp[4] << 8) | tmp[3]) << 8;
+	align = (tmp[6] << 8) | tmp[5];
+	len = ((tmp[8] << 8) | tmp[7]) << 8;
+	flags = tmp[0];
+	pnp_register_mem_resource(dev, option_flags,
+				  min, max, align, len, flags);
+}
+
+/*
+ *  Add 32-bit memory resource to resources list.
+ */
+static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
+					       unsigned int option_flags,
+					       int size)
+{
+	unsigned char tmp[17];
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	isapnp_peek(tmp, size);
+	min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
+	max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
+	align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
+	len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
+	flags = tmp[0];
+	pnp_register_mem_resource(dev, option_flags,
+				  min, max, align, len, flags);
+}
+
+/*
+ *  Add 32-bit fixed memory resource to resources list.
+ */
+static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
+						     unsigned int option_flags,
+						     int size)
+{
+	unsigned char tmp[9];
+	resource_size_t base, len;
+	unsigned char flags;
+
+	isapnp_peek(tmp, size);
+	base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
+	len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
+	flags = tmp[0];
+	pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
+}
+
+/*
+ *  Parse card name for ISA PnP device.
+ */
+static void __init
+isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
+{
+	if (name[0] == '\0') {
+		unsigned short size1 =
+		    *size >= name_max ? (name_max - 1) : *size;
+		isapnp_peek(name, size1);
+		name[size1] = '\0';
+		*size -= size1;
+
+		/* clean whitespace from end of string */
+		while (size1 > 0 && name[--size1] == ' ')
+			name[size1] = '\0';
+	}
+}
+
+/*
+ *  Parse resource map for logical device.
+ */
+static int __init isapnp_create_device(struct pnp_card *card,
+				       unsigned short size)
+{
+	int number = 0, skip = 0, priority, compat = 0;
+	unsigned char type, tmp[17];
+	unsigned int option_flags;
+	struct pnp_dev *dev;
+	u32 eisa_id;
+	char id[8];
+
+	if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
+		return 1;
+	option_flags = 0;
+	pnp_add_card_device(card, dev);
+
+	while (1) {
+		if (isapnp_read_tag(&type, &size) < 0)
+			return 1;
+		if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
+			goto __skip;
+		switch (type) {
+		case _STAG_LOGDEVID:
+			if (size >= 5 && size <= 6) {
+				if ((dev =
+				     isapnp_parse_device(card, size,
+							 number++)) == NULL)
+					return 1;
+				size = 0;
+				skip = 0;
+				option_flags = 0;
+				pnp_add_card_device(card, dev);
+			} else {
+				skip = 1;
+			}
+			compat = 0;
+			break;
+		case _STAG_COMPATDEVID:
+			if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
+				isapnp_peek(tmp, 4);
+				eisa_id = tmp[0] | tmp[1] << 8 |
+					  tmp[2] << 16 | tmp[3] << 24;
+				pnp_eisa_id_to_string(eisa_id, id);
+				pnp_add_id(dev, id);
+				compat++;
+				size = 0;
+			}
+			break;
+		case _STAG_IRQ:
+			if (size < 2 || size > 3)
+				goto __skip;
+			isapnp_parse_irq_resource(dev, option_flags, size);
+			size = 0;
+			break;
+		case _STAG_DMA:
+			if (size != 2)
+				goto __skip;
+			isapnp_parse_dma_resource(dev, option_flags, size);
+			size = 0;
+			break;
+		case _STAG_STARTDEP:
+			if (size > 1)
+				goto __skip;
+			priority = PNP_RES_PRIORITY_ACCEPTABLE;
+			if (size > 0) {
+				isapnp_peek(tmp, size);
+				priority = tmp[0];
+				size = 0;
+			}
+			option_flags = pnp_new_dependent_set(dev, priority);
+			break;
+		case _STAG_ENDDEP:
+			if (size != 0)
+				goto __skip;
+			option_flags = 0;
+			break;
+		case _STAG_IOPORT:
+			if (size != 7)
+				goto __skip;
+			isapnp_parse_port_resource(dev, option_flags, size);
+			size = 0;
+			break;
+		case _STAG_FIXEDIO:
+			if (size != 3)
+				goto __skip;
+			isapnp_parse_fixed_port_resource(dev, option_flags,
+							 size);
+			size = 0;
+			break;
+		case _STAG_VENDOR:
+			break;
+		case _LTAG_MEMRANGE:
+			if (size != 9)
+				goto __skip;
+			isapnp_parse_mem_resource(dev, option_flags, size);
+			size = 0;
+			break;
+		case _LTAG_ANSISTR:
+			isapnp_parse_name(dev->name, sizeof(dev->name), &size);
+			break;
+		case _LTAG_UNICODESTR:
+			/* silently ignore */
+			/* who use unicode for hardware identification? */
+			break;
+		case _LTAG_VENDOR:
+			break;
+		case _LTAG_MEM32RANGE:
+			if (size != 17)
+				goto __skip;
+			isapnp_parse_mem32_resource(dev, option_flags, size);
+			size = 0;
+			break;
+		case _LTAG_FIXEDMEM32RANGE:
+			if (size != 9)
+				goto __skip;
+			isapnp_parse_fixed_mem32_resource(dev, option_flags,
+							  size);
+			size = 0;
+			break;
+		case _STAG_END:
+			if (size > 0)
+				isapnp_skip_bytes(size);
+			return 1;
+		default:
+			dev_err(&dev->dev, "unknown tag %#x (card %i), "
+				"ignored\n", type, card->number);
+		}
+__skip:
+		if (size > 0)
+			isapnp_skip_bytes(size);
+	}
+	return 0;
+}
+
+/*
+ *  Parse resource map for ISA PnP card.
+ */
+static void __init isapnp_parse_resource_map(struct pnp_card *card)
+{
+	unsigned char type, tmp[17];
+	unsigned short size;
+
+	while (1) {
+		if (isapnp_read_tag(&type, &size) < 0)
+			return;
+		switch (type) {
+		case _STAG_PNPVERNO:
+			if (size != 2)
+				goto __skip;
+			isapnp_peek(tmp, 2);
+			card->pnpver = tmp[0];
+			card->productver = tmp[1];
+			size = 0;
+			break;
+		case _STAG_LOGDEVID:
+			if (size >= 5 && size <= 6) {
+				if (isapnp_create_device(card, size) == 1)
+					return;
+				size = 0;
+			}
+			break;
+		case _STAG_VENDOR:
+			break;
+		case _LTAG_ANSISTR:
+			isapnp_parse_name(card->name, sizeof(card->name),
+					  &size);
+			break;
+		case _LTAG_UNICODESTR:
+			/* silently ignore */
+			/* who use unicode for hardware identification? */
+			break;
+		case _LTAG_VENDOR:
+			break;
+		case _STAG_END:
+			if (size > 0)
+				isapnp_skip_bytes(size);
+			return;
+		default:
+			dev_err(&card->dev, "unknown tag %#x, ignored\n",
+			       type);
+		}
+__skip:
+		if (size > 0)
+			isapnp_skip_bytes(size);
+	}
+}
+
+/*
+ *  Build device list for all present ISA PnP devices.
+ */
+static int __init isapnp_build_device_list(void)
+{
+	int csn;
+	unsigned char header[9];
+	struct pnp_card *card;
+	u32 eisa_id;
+	char id[8];
+
+	isapnp_wait();
+	isapnp_key();
+	for (csn = 1; csn <= isapnp_csn_count; csn++) {
+		isapnp_wake(csn);
+		isapnp_peek(header, 9);
+		eisa_id = header[0] | header[1] << 8 |
+			  header[2] << 16 | header[3] << 24;
+		pnp_eisa_id_to_string(eisa_id, id);
+		card = pnp_alloc_card(&isapnp_protocol, csn, id);
+		if (!card)
+			continue;
+
+		INIT_LIST_HEAD(&card->devices);
+		card->serial =
+		    (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
+		    header[4];
+		isapnp_checksum_value = 0x00;
+		isapnp_parse_resource_map(card);
+		if (isapnp_checksum_value != 0x00)
+			dev_err(&card->dev, "invalid checksum %#x\n",
+				isapnp_checksum_value);
+		card->checksum = isapnp_checksum_value;
+
+		pnp_add_card(card);
+	}
+	isapnp_wait();
+	return 0;
+}
+
+/*
+ *  Basic configuration routines.
+ */
+
+int isapnp_present(void)
+{
+	struct pnp_card *card;
+
+	pnp_for_each_card(card) {
+		if (card->protocol == &isapnp_protocol)
+			return 1;
+	}
+	return 0;
+}
+
+int isapnp_cfg_begin(int csn, int logdev)
+{
+	if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
+		return -EINVAL;
+	mutex_lock(&isapnp_cfg_mutex);
+	isapnp_wait();
+	isapnp_key();
+	isapnp_wake(csn);
+#if 0
+	/* to avoid malfunction when the isapnptools package is used */
+	/* we must set RDP to our value again */
+	/* it is possible to set RDP only in the isolation phase */
+	/*   Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
+	isapnp_write_byte(0x02, 0x04);	/* clear CSN of card */
+	mdelay(2);		/* is this necessary? */
+	isapnp_wake(csn);	/* bring card into sleep state */
+	isapnp_wake(0);		/* bring card into isolation state */
+	isapnp_set_rdp();	/* reset the RDP port */
+	udelay(1000);		/* delay 1000us */
+	isapnp_write_byte(0x06, csn);	/* reset CSN to previous value */
+	udelay(250);		/* is this necessary? */
+#endif
+	if (logdev >= 0)
+		isapnp_device(logdev);
+	return 0;
+}
+
+int isapnp_cfg_end(void)
+{
+	isapnp_wait();
+	mutex_unlock(&isapnp_cfg_mutex);
+	return 0;
+}
+
+/*
+ *  Initialization.
+ */
+
+EXPORT_SYMBOL(isapnp_protocol);
+EXPORT_SYMBOL(isapnp_present);
+EXPORT_SYMBOL(isapnp_cfg_begin);
+EXPORT_SYMBOL(isapnp_cfg_end);
+EXPORT_SYMBOL(isapnp_write_byte);
+
+static int isapnp_get_resources(struct pnp_dev *dev)
+{
+	int i, ret;
+
+	pnp_dbg(&dev->dev, "get resources\n");
+	pnp_init_resources(dev);
+	isapnp_cfg_begin(dev->card->number, dev->number);
+	dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
+	if (!dev->active)
+		goto __end;
+
+	for (i = 0; i < ISAPNP_MAX_PORT; i++) {
+		ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
+		pnp_add_io_resource(dev, ret, ret,
+				    ret == 0 ? IORESOURCE_DISABLED : 0);
+	}
+	for (i = 0; i < ISAPNP_MAX_MEM; i++) {
+		ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
+		pnp_add_mem_resource(dev, ret, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
+	}
+	for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
+		ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
+		pnp_add_irq_resource(dev, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
+	}
+	for (i = 0; i < ISAPNP_MAX_DMA; i++) {
+		ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
+		pnp_add_dma_resource(dev, ret,
+				     ret == 4 ? IORESOURCE_DISABLED : 0);
+	}
+
+__end:
+	isapnp_cfg_end();
+	return 0;
+}
+
+static int isapnp_set_resources(struct pnp_dev *dev)
+{
+	struct resource *res;
+	int tmp;
+
+	pnp_dbg(&dev->dev, "set resources\n");
+	isapnp_cfg_begin(dev->card->number, dev->number);
+	dev->active = 1;
+	for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
+		res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
+		if (pnp_resource_enabled(res)) {
+			pnp_dbg(&dev->dev, "  set io  %d to %#llx\n",
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
+					  res->start);
+		}
+	}
+	for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
+		res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
+		if (pnp_resource_enabled(res)) {
+			int irq = res->start;
+			if (irq == 2)
+				irq = 9;
+			pnp_dbg(&dev->dev, "  set irq %d to %d\n", tmp, irq);
+			isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
+		}
+	}
+	for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
+		res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
+		if (pnp_resource_enabled(res)) {
+			pnp_dbg(&dev->dev, "  set dma %d to %lld\n",
+				tmp, (unsigned long long) res->start);
+			isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
+		}
+	}
+	for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
+		res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
+		if (pnp_resource_enabled(res)) {
+			pnp_dbg(&dev->dev, "  set mem %d to %#llx\n",
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
+					  (res->start >> 8) & 0xffff);
+		}
+	}
+	/* FIXME: We aren't handling 32bit mems properly here */
+	isapnp_activate(dev->number);
+	isapnp_cfg_end();
+	return 0;
+}
+
+static int isapnp_disable_resources(struct pnp_dev *dev)
+{
+	if (!dev->active)
+		return -EINVAL;
+	isapnp_cfg_begin(dev->card->number, dev->number);
+	isapnp_deactivate(dev->number);
+	dev->active = 0;
+	isapnp_cfg_end();
+	return 0;
+}
+
+struct pnp_protocol isapnp_protocol = {
+	.name = "ISA Plug and Play",
+	.get = isapnp_get_resources,
+	.set = isapnp_set_resources,
+	.disable = isapnp_disable_resources,
+};
+
+static int __init isapnp_init(void)
+{
+	int cards;
+	struct pnp_card *card;
+	struct pnp_dev *dev;
+
+	if (isapnp_disable) {
+		printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
+		return 0;
+	}
+#ifdef CONFIG_PPC
+	if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
+		return -EINVAL;
+#endif
+#ifdef ISAPNP_REGION_OK
+	if (!request_region(_PIDXR, 1, "isapnp index")) {
+		printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
+		       _PIDXR);
+		return -EBUSY;
+	}
+#endif
+	if (!request_region(_PNPWRP, 1, "isapnp write")) {
+		printk(KERN_ERR
+		       "isapnp: Write Data Register 0x%x already used\n",
+		       _PNPWRP);
+#ifdef ISAPNP_REGION_OK
+		release_region(_PIDXR, 1);
+#endif
+		return -EBUSY;
+	}
+
+	if (pnp_register_protocol(&isapnp_protocol) < 0)
+		return -EBUSY;
+
+	/*
+	 *      Print a message. The existing ISAPnP code is hanging machines
+	 *      so let the user know where.
+	 */
+
+	printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
+	if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
+		isapnp_rdp |= 3;
+		if (!request_region(isapnp_rdp, 1, "isapnp read")) {
+			printk(KERN_ERR
+			       "isapnp: Read Data Register 0x%x already used\n",
+			       isapnp_rdp);
+#ifdef ISAPNP_REGION_OK
+			release_region(_PIDXR, 1);
+#endif
+			release_region(_PNPWRP, 1);
+			return -EBUSY;
+		}
+		isapnp_set_rdp();
+	}
+	if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
+		cards = isapnp_isolate();
+		if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
+#ifdef ISAPNP_REGION_OK
+			release_region(_PIDXR, 1);
+#endif
+			release_region(_PNPWRP, 1);
+			printk(KERN_INFO
+			       "isapnp: No Plug & Play device found\n");
+			return 0;
+		}
+		request_region(isapnp_rdp, 1, "isapnp read");
+	}
+	isapnp_build_device_list();
+	cards = 0;
+
+	protocol_for_each_card(&isapnp_protocol, card) {
+		cards++;
+		if (isapnp_verbose) {
+			dev_info(&card->dev, "card '%s'\n",
+			       card->name[0] ? card->name : "unknown");
+			if (isapnp_verbose < 2)
+				continue;
+			card_for_each_dev(card, dev) {
+				dev_info(&card->dev, "device '%s'\n",
+				       dev->name[0] ? dev->name : "unknown");
+			}
+		}
+	}
+	if (cards)
+		printk(KERN_INFO
+		       "isapnp: %i Plug & Play card%s detected total\n", cards,
+		       cards > 1 ? "s" : "");
+	else
+		printk(KERN_INFO "isapnp: No Plug & Play card found\n");
+
+	isapnp_proc_init();
+	return 0;
+}
+
+device_initcall(isapnp_init);
+
+/* format is: noisapnp */
+
+static int __init isapnp_setup_disable(char *str)
+{
+	isapnp_disable = 1;
+	return 1;
+}
+
+__setup("noisapnp", isapnp_setup_disable);
+
+/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
+
+static int __init isapnp_setup_isapnp(char *str)
+{
+	(void)((get_option(&str, &isapnp_rdp) == 2) &&
+	       (get_option(&str, &isapnp_reset) == 2) &&
+	       (get_option(&str, &isapnp_verbose) == 2));
+	return 1;
+}
+
+__setup("isapnp=", isapnp_setup_isapnp);
diff --git a/drivers/pnp/isapnp/proc.c b/drivers/pnp/isapnp/proc.c
new file mode 100644
index 000000000..785a79643
--- /dev/null
+++ b/drivers/pnp/isapnp/proc.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  ISA Plug & Play support
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/uaccess.h>
+
+extern struct pnp_protocol isapnp_protocol;
+
+static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
+
+static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
+{
+	return fixed_size_llseek(file, off, whence, 256);
+}
+
+static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
+				    size_t nbytes, loff_t * ppos)
+{
+	struct pnp_dev *dev = PDE_DATA(file_inode(file));
+	int pos = *ppos;
+	int cnt, size = 256;
+
+	if (pos >= size)
+		return 0;
+	if (nbytes >= size)
+		nbytes = size;
+	if (pos + nbytes > size)
+		nbytes = size - pos;
+	cnt = nbytes;
+
+	if (!access_ok(buf, cnt))
+		return -EINVAL;
+
+	isapnp_cfg_begin(dev->card->number, dev->number);
+	for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
+		unsigned char val;
+		val = isapnp_read_byte(pos);
+		__put_user(val, buf);
+	}
+	isapnp_cfg_end();
+
+	*ppos = pos;
+	return nbytes;
+}
+
+static const struct proc_ops isapnp_proc_bus_proc_ops = {
+	.proc_lseek	= isapnp_proc_bus_lseek,
+	.proc_read	= isapnp_proc_bus_read,
+};
+
+static int isapnp_proc_attach_device(struct pnp_dev *dev)
+{
+	struct pnp_card *bus = dev->card;
+	struct proc_dir_entry *de, *e;
+	char name[16];
+
+	if (!(de = bus->procdir)) {
+		sprintf(name, "%02x", bus->number);
+		de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
+		if (!de)
+			return -ENOMEM;
+	}
+	sprintf(name, "%02x", dev->number);
+	e = dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, de,
+					    &isapnp_proc_bus_proc_ops, dev);
+	if (!e)
+		return -ENOMEM;
+	proc_set_size(e, 256);
+	return 0;
+}
+
+int __init isapnp_proc_init(void)
+{
+	struct pnp_dev *dev;
+
+	isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL);
+	protocol_for_each_dev(&isapnp_protocol, dev) {
+		isapnp_proc_attach_device(dev);
+	}
+	return 0;
+}
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
new file mode 100644
index 000000000..144055593
--- /dev/null
+++ b/drivers/pnp/manager.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pnp.h>
+#include <linux/bitmap.h>
+#include <linux/mutex.h>
+#include "base.h"
+
+DEFINE_MUTEX(pnp_res_mutex);
+
+static struct resource *pnp_find_resource(struct pnp_dev *dev,
+					  unsigned char rule,
+					  unsigned long type,
+					  unsigned int bar)
+{
+	struct resource *res = pnp_get_resource(dev, type, bar);
+
+	/* when the resource already exists, set its resource bits from rule */
+	if (res) {
+		res->flags &= ~IORESOURCE_BITS;
+		res->flags |= rule & IORESOURCE_BITS;
+	}
+
+	return res;
+}
+
+static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
+{
+	struct resource *res, local_res;
+
+	res = pnp_find_resource(dev, rule->flags, IORESOURCE_IO, idx);
+	if (res) {
+		pnp_dbg(&dev->dev, "  io %d already set to %#llx-%#llx "
+			"flags %#lx\n", idx, (unsigned long long) res->start,
+			(unsigned long long) res->end, res->flags);
+		return 0;
+	}
+
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
+
+	if (!rule->size) {
+		res->flags |= IORESOURCE_DISABLED;
+		pnp_dbg(&dev->dev, "  io %d disabled\n", idx);
+		goto __add;
+	}
+
+	res->start = rule->min;
+	res->end = res->start + rule->size - 1;
+
+	while (!pnp_check_port(dev, res)) {
+		res->start += rule->align;
+		res->end = res->start + rule->size - 1;
+		if (res->start > rule->max || !rule->align) {
+			pnp_dbg(&dev->dev, "  couldn't assign io %d "
+				"(min %#llx max %#llx)\n", idx,
+				(unsigned long long) rule->min,
+				(unsigned long long) rule->max);
+			return -EBUSY;
+		}
+	}
+
+__add:
+	pnp_add_io_resource(dev, res->start, res->end, res->flags);
+	return 0;
+}
+
+static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
+{
+	struct resource *res, local_res;
+
+	res = pnp_find_resource(dev, rule->flags, IORESOURCE_MEM, idx);
+	if (res) {
+		pnp_dbg(&dev->dev, "  mem %d already set to %#llx-%#llx "
+			"flags %#lx\n", idx, (unsigned long long) res->start,
+			(unsigned long long) res->end, res->flags);
+		return 0;
+	}
+
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
+
+	/* ??? rule->flags restricted to 8 bits, all tests bogus ??? */
+	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
+		res->flags |= IORESOURCE_READONLY;
+	if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
+		res->flags |= IORESOURCE_RANGELENGTH;
+	if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
+		res->flags |= IORESOURCE_SHADOWABLE;
+
+	if (!rule->size) {
+		res->flags |= IORESOURCE_DISABLED;
+		pnp_dbg(&dev->dev, "  mem %d disabled\n", idx);
+		goto __add;
+	}
+
+	res->start = rule->min;
+	res->end = res->start + rule->size - 1;
+
+	while (!pnp_check_mem(dev, res)) {
+		res->start += rule->align;
+		res->end = res->start + rule->size - 1;
+		if (res->start > rule->max || !rule->align) {
+			pnp_dbg(&dev->dev, "  couldn't assign mem %d "
+				"(min %#llx max %#llx)\n", idx,
+				(unsigned long long) rule->min,
+				(unsigned long long) rule->max);
+			return -EBUSY;
+		}
+	}
+
+__add:
+	pnp_add_mem_resource(dev, res->start, res->end, res->flags);
+	return 0;
+}
+
+static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
+{
+	struct resource *res, local_res;
+	int i;
+
+	/* IRQ priority: this table is good for i386 */
+	static unsigned short xtab[16] = {
+		5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
+	};
+
+	res = pnp_find_resource(dev, rule->flags, IORESOURCE_IRQ, idx);
+	if (res) {
+		pnp_dbg(&dev->dev, "  irq %d already set to %d flags %#lx\n",
+			idx, (int) res->start, res->flags);
+		return 0;
+	}
+
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
+
+	if (bitmap_empty(rule->map.bits, PNP_IRQ_NR)) {
+		res->flags |= IORESOURCE_DISABLED;
+		pnp_dbg(&dev->dev, "  irq %d disabled\n", idx);
+		goto __add;
+	}
+
+	/* TBD: need check for >16 IRQ */
+	res->start = find_next_bit(rule->map.bits, PNP_IRQ_NR, 16);
+	if (res->start < PNP_IRQ_NR) {
+		res->end = res->start;
+		goto __add;
+	}
+	for (i = 0; i < 16; i++) {
+		if (test_bit(xtab[i], rule->map.bits)) {
+			res->start = res->end = xtab[i];
+			if (pnp_check_irq(dev, res))
+				goto __add;
+		}
+	}
+
+	if (rule->flags & IORESOURCE_IRQ_OPTIONAL) {
+		res->start = -1;
+		res->end = -1;
+		res->flags |= IORESOURCE_DISABLED;
+		pnp_dbg(&dev->dev, "  irq %d disabled (optional)\n", idx);
+		goto __add;
+	}
+
+	pnp_dbg(&dev->dev, "  couldn't assign irq %d\n", idx);
+	return -EBUSY;
+
+__add:
+	pnp_add_irq_resource(dev, res->start, res->flags);
+	return 0;
+}
+
+#ifdef CONFIG_ISA_DMA_API
+static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
+{
+	struct resource *res, local_res;
+	int i;
+
+	/* DMA priority: this table is good for i386 */
+	static unsigned short xtab[8] = {
+		1, 3, 5, 6, 7, 0, 2, 4
+	};
+
+	res = pnp_find_resource(dev, rule->flags, IORESOURCE_DMA, idx);
+	if (res) {
+		pnp_dbg(&dev->dev, "  dma %d already set to %d flags %#lx\n",
+			idx, (int) res->start, res->flags);
+		return 0;
+	}
+
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
+
+	if (!rule->map) {
+		res->flags |= IORESOURCE_DISABLED;
+		pnp_dbg(&dev->dev, "  dma %d disabled\n", idx);
+		goto __add;
+	}
+
+	for (i = 0; i < 8; i++) {
+		if (rule->map & (1 << xtab[i])) {
+			res->start = res->end = xtab[i];
+			if (pnp_check_dma(dev, res))
+				goto __add;
+		}
+	}
+
+	pnp_dbg(&dev->dev, "  couldn't assign dma %d\n", idx);
+	return -EBUSY;
+
+__add:
+	pnp_add_dma_resource(dev, res->start, res->flags);
+	return 0;
+}
+#endif /* CONFIG_ISA_DMA_API */
+
+void pnp_init_resources(struct pnp_dev *dev)
+{
+	pnp_free_resources(dev);
+}
+
+static void pnp_clean_resource_table(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res, *tmp;
+
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		if (pnp_res->res.flags & IORESOURCE_AUTO)
+			pnp_free_resource(pnp_res);
+	}
+}
+
+/**
+ * pnp_assign_resources - assigns resources to the device based on the specified dependent number
+ * @dev: pointer to the desired device
+ * @set: the dependent function number
+ */
+static int pnp_assign_resources(struct pnp_dev *dev, int set)
+{
+	struct pnp_option *option;
+	int nport = 0, nmem = 0, nirq = 0;
+	int ndma __maybe_unused = 0;
+	int ret = 0;
+
+	pnp_dbg(&dev->dev, "pnp_assign_resources, try dependent set %d\n", set);
+	mutex_lock(&pnp_res_mutex);
+	pnp_clean_resource_table(dev);
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option) &&
+		    pnp_option_set(option) != set)
+				continue;
+
+		switch (option->type) {
+		case IORESOURCE_IO:
+			ret = pnp_assign_port(dev, &option->u.port, nport++);
+			break;
+		case IORESOURCE_MEM:
+			ret = pnp_assign_mem(dev, &option->u.mem, nmem++);
+			break;
+		case IORESOURCE_IRQ:
+			ret = pnp_assign_irq(dev, &option->u.irq, nirq++);
+			break;
+#ifdef CONFIG_ISA_DMA_API
+		case IORESOURCE_DMA:
+			ret = pnp_assign_dma(dev, &option->u.dma, ndma++);
+			break;
+#endif
+		default:
+			ret = -EINVAL;
+			break;
+		}
+		if (ret < 0)
+			break;
+	}
+
+	mutex_unlock(&pnp_res_mutex);
+	if (ret < 0) {
+		pnp_dbg(&dev->dev, "pnp_assign_resources failed (%d)\n", ret);
+		pnp_clean_resource_table(dev);
+	} else
+		dbg_pnp_show_resources(dev, "pnp_assign_resources succeeded");
+	return ret;
+}
+
+/**
+ * pnp_auto_config_dev - automatically assigns resources to a device
+ * @dev: pointer to the desired device
+ */
+int pnp_auto_config_dev(struct pnp_dev *dev)
+{
+	int i, ret;
+
+	if (!pnp_can_configure(dev)) {
+		pnp_dbg(&dev->dev, "configuration not supported\n");
+		return -ENODEV;
+	}
+
+	ret = pnp_assign_resources(dev, 0);
+	if (ret == 0)
+		return 0;
+
+	for (i = 1; i < dev->num_dependent_sets; i++) {
+		ret = pnp_assign_resources(dev, i);
+		if (ret == 0)
+			return 0;
+	}
+
+	dev_err(&dev->dev, "unable to assign resources\n");
+	return ret;
+}
+
+/**
+ * pnp_start_dev - low-level start of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * assumes that resources have already been allocated
+ */
+int pnp_start_dev(struct pnp_dev *dev)
+{
+	if (!pnp_can_write(dev)) {
+		pnp_dbg(&dev->dev, "activation not supported\n");
+		return -EINVAL;
+	}
+
+	dbg_pnp_show_resources(dev, "pnp_start_dev");
+	if (dev->protocol->set(dev) < 0) {
+		dev_err(&dev->dev, "activation failed\n");
+		return -EIO;
+	}
+
+	dev_info(&dev->dev, "activated\n");
+	return 0;
+}
+
+/**
+ * pnp_stop_dev - low-level disable of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * does not free resources
+ */
+int pnp_stop_dev(struct pnp_dev *dev)
+{
+	if (!pnp_can_disable(dev)) {
+		pnp_dbg(&dev->dev, "disabling not supported\n");
+		return -EINVAL;
+	}
+	if (dev->protocol->disable(dev) < 0) {
+		dev_err(&dev->dev, "disable failed\n");
+		return -EIO;
+	}
+
+	dev_info(&dev->dev, "disabled\n");
+	return 0;
+}
+
+/**
+ * pnp_activate_dev - activates a PnP device for use
+ * @dev: pointer to the desired device
+ *
+ * does not validate or set resources so be careful.
+ */
+int pnp_activate_dev(struct pnp_dev *dev)
+{
+	int error;
+
+	if (dev->active)
+		return 0;
+
+	/* ensure resources are allocated */
+	if (pnp_auto_config_dev(dev))
+		return -EBUSY;
+
+	error = pnp_start_dev(dev);
+	if (error)
+		return error;
+
+	dev->active = 1;
+	return 0;
+}
+
+/**
+ * pnp_disable_dev - disables device
+ * @dev: pointer to the desired device
+ *
+ * inform the correct pnp protocol so that resources can be used by other devices
+ */
+int pnp_disable_dev(struct pnp_dev *dev)
+{
+	int error;
+
+	if (!dev->active)
+		return 0;
+
+	error = pnp_stop_dev(dev);
+	if (error)
+		return error;
+
+	dev->active = 0;
+
+	/* release the resources so that other devices can use them */
+	mutex_lock(&pnp_res_mutex);
+	pnp_clean_resource_table(dev);
+	mutex_unlock(&pnp_res_mutex);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(pnp_start_dev);
+EXPORT_SYMBOL(pnp_stop_dev);
+EXPORT_SYMBOL(pnp_activate_dev);
+EXPORT_SYMBOL(pnp_disable_dev);
diff --git a/drivers/pnp/pnpacpi/Kconfig b/drivers/pnp/pnpacpi/Kconfig
new file mode 100644
index 000000000..70f733f63
--- /dev/null
+++ b/drivers/pnp/pnpacpi/Kconfig
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Plug and Play ACPI configuration
+#
+config PNPACPI
+	bool
+	default (PNP && ACPI)
diff --git a/drivers/pnp/pnpacpi/Makefile b/drivers/pnp/pnpacpi/Makefile
new file mode 100644
index 000000000..fb1c7154c
--- /dev/null
+++ b/drivers/pnp/pnpacpi/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the kernel PNPACPI driver.
+#
+obj-y += pnp.o
+
+pnp-y := core.o rsparser.o
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
new file mode 100644
index 000000000..afaf30a36
--- /dev/null
+++ b/drivers/pnp/pnpacpi/core.c
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * pnpacpi -- PnP ACPI driver
+ *
+ * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
+ * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
+ */
+
+#include <linux/export.h>
+#include <linux/acpi.h>
+#include <linux/pnp.h>
+#include <linux/slab.h>
+#include <linux/mod_devicetable.h>
+
+#include "../base.h"
+#include "pnpacpi.h"
+
+static int num;
+
+/*
+ * Compatible Device IDs
+ */
+#define TEST_HEX(c) \
+	if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
+		return 0
+#define TEST_ALPHA(c) \
+	if (!('A' <= (c) && (c) <= 'Z')) \
+		return 0
+static int __init ispnpidacpi(const char *id)
+{
+	TEST_ALPHA(id[0]);
+	TEST_ALPHA(id[1]);
+	TEST_ALPHA(id[2]);
+	TEST_HEX(id[3]);
+	TEST_HEX(id[4]);
+	TEST_HEX(id[5]);
+	TEST_HEX(id[6]);
+	if (id[7] != '\0')
+		return 0;
+	return 1;
+}
+
+static int pnpacpi_get_resources(struct pnp_dev *dev)
+{
+	pnp_dbg(&dev->dev, "get resources\n");
+	return pnpacpi_parse_allocated_resource(dev);
+}
+
+static int pnpacpi_set_resources(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev;
+	acpi_handle handle;
+	int ret = 0;
+
+	pnp_dbg(&dev->dev, "set resources\n");
+
+	acpi_dev = ACPI_COMPANION(&dev->dev);
+	if (!acpi_dev) {
+		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+		return -ENODEV;
+	}
+
+	if (WARN_ON_ONCE(acpi_dev != dev->data))
+		dev->data = acpi_dev;
+
+	handle = acpi_dev->handle;
+	if (acpi_has_method(handle, METHOD_NAME__SRS)) {
+		struct acpi_buffer buffer;
+
+		ret = pnpacpi_build_resource_template(dev, &buffer);
+		if (ret)
+			return ret;
+
+		ret = pnpacpi_encode_resources(dev, &buffer);
+		if (!ret) {
+			acpi_status status;
+
+			status = acpi_set_current_resources(handle, &buffer);
+			if (ACPI_FAILURE(status))
+				ret = -EIO;
+		}
+		kfree(buffer.pointer);
+	}
+	if (!ret && acpi_device_power_manageable(acpi_dev))
+		ret = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
+
+	return ret;
+}
+
+static int pnpacpi_disable_resources(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev;
+	acpi_status status;
+
+	dev_dbg(&dev->dev, "disable resources\n");
+
+	acpi_dev = ACPI_COMPANION(&dev->dev);
+	if (!acpi_dev) {
+		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+		return 0;
+	}
+
+	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
+	if (acpi_device_power_manageable(acpi_dev))
+		acpi_device_set_power(acpi_dev, ACPI_STATE_D3_COLD);
+
+	/* continue even if acpi_device_set_power() fails */
+	status = acpi_evaluate_object(acpi_dev->handle, "_DIS", NULL, NULL);
+	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
+		return -ENODEV;
+
+	return 0;
+}
+
+#ifdef CONFIG_ACPI_SLEEP
+static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+
+	if (!acpi_dev) {
+		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+		return false;
+	}
+
+	return acpi_bus_can_wakeup(acpi_dev->handle);
+}
+
+static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+	int error = 0;
+
+	if (!acpi_dev) {
+		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+		return 0;
+	}
+
+	if (device_can_wakeup(&dev->dev)) {
+		error = acpi_pm_set_device_wakeup(&dev->dev,
+					      device_may_wakeup(&dev->dev));
+		if (error)
+			return error;
+	}
+
+	if (acpi_device_power_manageable(acpi_dev)) {
+		int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
+							ACPI_STATE_D3_COLD);
+		if (power_state < 0)
+			power_state = (state.event == PM_EVENT_ON) ?
+					ACPI_STATE_D0 : ACPI_STATE_D3_COLD;
+
+		/*
+		 * acpi_device_set_power() can fail (keyboard port can't be
+		 * powered-down?), and in any case, our return value is ignored
+		 * by pnp_bus_suspend().  Hence we don't revert the wakeup
+		 * setting if the set_power fails.
+		 */
+		error = acpi_device_set_power(acpi_dev, power_state);
+	}
+
+	return error;
+}
+
+static int pnpacpi_resume(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+	int error = 0;
+
+	if (!acpi_dev) {
+		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+		return -ENODEV;
+	}
+
+	if (device_may_wakeup(&dev->dev))
+		acpi_pm_set_device_wakeup(&dev->dev, false);
+
+	if (acpi_device_power_manageable(acpi_dev))
+		error = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
+
+	return error;
+}
+#endif
+
+struct pnp_protocol pnpacpi_protocol = {
+	.name	 = "Plug and Play ACPI",
+	.get	 = pnpacpi_get_resources,
+	.set	 = pnpacpi_set_resources,
+	.disable = pnpacpi_disable_resources,
+#ifdef CONFIG_ACPI_SLEEP
+	.can_wakeup = pnpacpi_can_wakeup,
+	.suspend = pnpacpi_suspend,
+	.resume = pnpacpi_resume,
+#endif
+};
+EXPORT_SYMBOL(pnpacpi_protocol);
+
+static const char *__init pnpacpi_get_id(struct acpi_device *device)
+{
+	struct acpi_hardware_id *id;
+
+	list_for_each_entry(id, &device->pnp.ids, list) {
+		if (ispnpidacpi(id->id))
+			return id->id;
+	}
+
+	return NULL;
+}
+
+static int __init pnpacpi_add_device(struct acpi_device *device)
+{
+	struct pnp_dev *dev;
+	const char *pnpid;
+	struct acpi_hardware_id *id;
+	int error;
+
+	/* Skip devices that are already bound */
+	if (device->physical_node_count)
+		return 0;
+
+	/*
+	 * If a PnPacpi device is not present , the device
+	 * driver should not be loaded.
+	 */
+	if (!acpi_has_method(device->handle, "_CRS"))
+		return 0;
+
+	pnpid = pnpacpi_get_id(device);
+	if (!pnpid)
+		return 0;
+
+	if (!device->status.present)
+		return 0;
+
+	dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
+	if (!dev)
+		return -ENOMEM;
+
+	ACPI_COMPANION_SET(&dev->dev, device);
+	dev->data = device;
+	/* .enabled means the device can decode the resources */
+	dev->active = device->status.enabled;
+	if (acpi_has_method(device->handle, "_SRS"))
+		dev->capabilities |= PNP_CONFIGURABLE;
+	dev->capabilities |= PNP_READ;
+	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
+		dev->capabilities |= PNP_WRITE;
+	if (device->flags.removable)
+		dev->capabilities |= PNP_REMOVABLE;
+	if (acpi_has_method(device->handle, "_DIS"))
+		dev->capabilities |= PNP_DISABLE;
+
+	if (strlen(acpi_device_name(device)))
+		strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
+	else
+		strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
+
+	if (dev->active)
+		pnpacpi_parse_allocated_resource(dev);
+
+	if (dev->capabilities & PNP_CONFIGURABLE)
+		pnpacpi_parse_resource_option_data(dev);
+
+	list_for_each_entry(id, &device->pnp.ids, list) {
+		if (!strcmp(id->id, pnpid))
+			continue;
+		if (!ispnpidacpi(id->id))
+			continue;
+		pnp_add_id(dev, id->id);
+	}
+
+	/* clear out the damaged flags */
+	if (!dev->active)
+		pnp_init_resources(dev);
+
+	error = pnp_add_device(dev);
+	if (error) {
+		put_device(&dev->dev);
+		return error;
+	}
+
+	num++;
+
+	return 0;
+}
+
+static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
+						     u32 lvl, void *context,
+						     void **rv)
+{
+	struct acpi_device *device;
+
+	if (acpi_bus_get_device(handle, &device))
+		return AE_CTRL_DEPTH;
+	if (acpi_is_pnp_device(device))
+		pnpacpi_add_device(device);
+	return AE_OK;
+}
+
+int pnpacpi_disabled __initdata;
+static int __init pnpacpi_init(void)
+{
+	if (acpi_disabled || pnpacpi_disabled) {
+		printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
+		return 0;
+	}
+	printk(KERN_INFO "pnp: PnP ACPI init\n");
+	pnp_register_protocol(&pnpacpi_protocol);
+	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
+	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
+	pnp_platform_devices = 1;
+	return 0;
+}
+
+fs_initcall(pnpacpi_init);
+
+static int __init pnpacpi_setup(char *str)
+{
+	if (str == NULL)
+		return 1;
+	if (!strncmp(str, "off", 3))
+		pnpacpi_disabled = 1;
+	return 1;
+}
+
+__setup("pnpacpi=", pnpacpi_setup);
diff --git a/drivers/pnp/pnpacpi/pnpacpi.h b/drivers/pnp/pnpacpi/pnpacpi.h
new file mode 100644
index 000000000..4489cd6db
--- /dev/null
+++ b/drivers/pnp/pnpacpi/pnpacpi.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ACPI_PNP_H
+#define ACPI_PNP_H
+
+#include <linux/acpi.h>
+#include <linux/pnp.h>
+
+int pnpacpi_parse_allocated_resource(struct pnp_dev *);
+int pnpacpi_parse_resource_option_data(struct pnp_dev *);
+int pnpacpi_encode_resources(struct pnp_dev *, struct acpi_buffer *);
+int pnpacpi_build_resource_template(struct pnp_dev *, struct acpi_buffer *);
+#endif
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
new file mode 100644
index 000000000..da78dc77a
--- /dev/null
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -0,0 +1,947 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * pnpacpi -- PnP ACPI driver
+ *
+ * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
+ * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+#include <linux/kernel.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/pnp.h>
+#include <linux/slab.h>
+#include "../base.h"
+#include "pnpacpi.h"
+
+static void decode_irq_flags(struct pnp_dev *dev, int flags, u8 *triggering,
+			     u8 *polarity, u8 *shareable)
+{
+	switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
+			 IORESOURCE_IRQ_LOWEDGE  | IORESOURCE_IRQ_HIGHEDGE)) {
+	case IORESOURCE_IRQ_LOWLEVEL:
+		*triggering = ACPI_LEVEL_SENSITIVE;
+		*polarity = ACPI_ACTIVE_LOW;
+		break;
+	case IORESOURCE_IRQ_HIGHLEVEL:
+		*triggering = ACPI_LEVEL_SENSITIVE;
+		*polarity = ACPI_ACTIVE_HIGH;
+		break;
+	case IORESOURCE_IRQ_LOWEDGE:
+		*triggering = ACPI_EDGE_SENSITIVE;
+		*polarity = ACPI_ACTIVE_LOW;
+		break;
+	case IORESOURCE_IRQ_HIGHEDGE:
+		*triggering = ACPI_EDGE_SENSITIVE;
+		*polarity = ACPI_ACTIVE_HIGH;
+		break;
+	default:
+		dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
+			flags);
+		*triggering = ACPI_EDGE_SENSITIVE;
+		*polarity = ACPI_ACTIVE_HIGH;
+		break;
+	}
+
+	if (flags & IORESOURCE_IRQ_SHAREABLE)
+		*shareable = ACPI_SHARED;
+	else
+		*shareable = ACPI_EXCLUSIVE;
+}
+
+static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
+		     int transfer)
+{
+	int flags = 0;
+
+	if (bus_master)
+		flags |= IORESOURCE_DMA_MASTER;
+	switch (type) {
+	case ACPI_COMPATIBILITY:
+		flags |= IORESOURCE_DMA_COMPATIBLE;
+		break;
+	case ACPI_TYPE_A:
+		flags |= IORESOURCE_DMA_TYPEA;
+		break;
+	case ACPI_TYPE_B:
+		flags |= IORESOURCE_DMA_TYPEB;
+		break;
+	case ACPI_TYPE_F:
+		flags |= IORESOURCE_DMA_TYPEF;
+		break;
+	default:
+		/* Set a default value ? */
+		flags |= IORESOURCE_DMA_COMPATIBLE;
+		dev_err(&dev->dev, "invalid DMA type %d\n", type);
+	}
+	switch (transfer) {
+	case ACPI_TRANSFER_8:
+		flags |= IORESOURCE_DMA_8BIT;
+		break;
+	case ACPI_TRANSFER_8_16:
+		flags |= IORESOURCE_DMA_8AND16BIT;
+		break;
+	case ACPI_TRANSFER_16:
+		flags |= IORESOURCE_DMA_16BIT;
+		break;
+	default:
+		/* Set a default value ? */
+		flags |= IORESOURCE_DMA_8AND16BIT;
+		dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
+	}
+
+	return flags;
+}
+
+/*
+ * Allocated Resources
+ */
+
+static void pnpacpi_add_irqresource(struct pnp_dev *dev, struct resource *r)
+{
+	if (!(r->flags & IORESOURCE_DISABLED))
+		pcibios_penalize_isa_irq(r->start, 1);
+
+	pnp_add_resource(dev, r);
+}
+
+/*
+ * Device CSRs that do not appear in PCI config space should be described
+ * via ACPI.  This would normally be done with Address Space Descriptors
+ * marked as "consumer-only," but old versions of Windows and Linux ignore
+ * the producer/consumer flag, so HP invented a vendor-defined resource to
+ * describe the location and size of CSR space.
+ */
+static struct acpi_vendor_uuid hp_ccsr_uuid = {
+	.subtype = 2,
+	.data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
+	    0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
+};
+
+static int vendor_resource_matches(struct pnp_dev *dev,
+				   struct acpi_resource_vendor_typed *vendor,
+				   struct acpi_vendor_uuid *match,
+				   int expected_len)
+{
+	int uuid_len = sizeof(vendor->uuid);
+	u8 uuid_subtype = vendor->uuid_subtype;
+	u8 *uuid = vendor->uuid;
+	int actual_len;
+
+	/* byte_length includes uuid_subtype and uuid */
+	actual_len = vendor->byte_length - uuid_len - 1;
+
+	if (uuid_subtype == match->subtype &&
+	    uuid_len == sizeof(match->data) &&
+	    memcmp(uuid, match->data, uuid_len) == 0) {
+		if (expected_len && expected_len != actual_len) {
+			dev_err(&dev->dev,
+				"wrong vendor descriptor size; expected %d, found %d bytes\n",
+				expected_len, actual_len);
+			return 0;
+		}
+
+		return 1;
+	}
+
+	return 0;
+}
+
+static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
+				    struct acpi_resource_vendor_typed *vendor)
+{
+	if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
+		u64 start, length;
+
+		memcpy(&start, vendor->byte_data, sizeof(start));
+		memcpy(&length, vendor->byte_data + 8, sizeof(length));
+
+		pnp_add_mem_resource(dev, start, start + length - 1, 0);
+	}
+}
+
+static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
+					      void *data)
+{
+	struct pnp_dev *dev = data;
+	struct acpi_resource_dma *dma;
+	struct acpi_resource_vendor_typed *vendor_typed;
+	struct acpi_resource_gpio *gpio;
+	struct resource_win win = {{0}, 0};
+	struct resource *r = &win.res;
+	int i, flags;
+
+	if (acpi_dev_resource_address_space(res, &win)
+	    || acpi_dev_resource_ext_address_space(res, &win)) {
+		pnp_add_resource(dev, &win.res);
+		return AE_OK;
+	}
+
+	r->flags = 0;
+	if (acpi_dev_resource_interrupt(res, 0, r)) {
+		pnpacpi_add_irqresource(dev, r);
+		for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
+			pnpacpi_add_irqresource(dev, r);
+
+		if (i > 1) {
+			/*
+			 * The IRQ encoder puts a single interrupt in each
+			 * descriptor, so if a _CRS descriptor has more than
+			 * one interrupt, we won't be able to re-encode it.
+			 */
+			if (pnp_can_write(dev)) {
+				dev_warn(&dev->dev,
+					 "multiple interrupts in _CRS descriptor; configuration can't be changed\n");
+				dev->capabilities &= ~PNP_WRITE;
+			}
+		}
+		return AE_OK;
+	} else if (acpi_gpio_get_irq_resource(res, &gpio)) {
+		/*
+		 * If the resource is GpioInt() type then extract the IRQ
+		 * from GPIO resource and fill it into IRQ resource type.
+		 */
+		i = acpi_dev_gpio_irq_get(dev->data, 0);
+		if (i >= 0) {
+			flags = acpi_dev_irq_flags(gpio->triggering,
+						   gpio->polarity,
+						   gpio->shareable);
+		} else {
+			flags = IORESOURCE_DISABLED;
+		}
+		pnp_add_irq_resource(dev, i, flags);
+		return AE_OK;
+	} else if (r->flags & IORESOURCE_DISABLED) {
+		pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
+		return AE_OK;
+	}
+
+	switch (res->type) {
+	case ACPI_RESOURCE_TYPE_MEMORY24:
+	case ACPI_RESOURCE_TYPE_MEMORY32:
+	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+		if (acpi_dev_resource_memory(res, r))
+			pnp_add_resource(dev, r);
+		break;
+	case ACPI_RESOURCE_TYPE_IO:
+	case ACPI_RESOURCE_TYPE_FIXED_IO:
+		if (acpi_dev_resource_io(res, r))
+			pnp_add_resource(dev, r);
+		break;
+	case ACPI_RESOURCE_TYPE_DMA:
+		dma = &res->data.dma;
+		if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
+			flags = dma_flags(dev, dma->type, dma->bus_master,
+					  dma->transfer);
+		else
+			flags = IORESOURCE_DISABLED;
+		pnp_add_dma_resource(dev, dma->channels[0], flags);
+		break;
+
+	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+		break;
+
+	case ACPI_RESOURCE_TYPE_VENDOR:
+		vendor_typed = &res->data.vendor_typed;
+		pnpacpi_parse_allocated_vendor(dev, vendor_typed);
+		break;
+
+	case ACPI_RESOURCE_TYPE_END_TAG:
+		break;
+
+	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+		break;
+
+	case ACPI_RESOURCE_TYPE_SERIAL_BUS:
+		/* serial bus connections (I2C/SPI/UART) are not pnp */
+		break;
+
+	default:
+		dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
+			 res->type);
+		return AE_ERROR;
+	}
+
+	return AE_OK;
+}
+
+int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev = dev->data;
+	acpi_handle handle = acpi_dev->handle;
+	acpi_status status;
+
+	pnp_dbg(&dev->dev, "parse allocated resources\n");
+
+	pnp_init_resources(dev);
+
+	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+				     pnpacpi_allocated_resource, dev);
+
+	if (ACPI_FAILURE(status)) {
+		if (status != AE_NOT_FOUND)
+			dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
+		return -EPERM;
+	}
+	return 0;
+}
+
+static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
+					    unsigned int option_flags,
+					    struct acpi_resource_dma *p)
+{
+	int i;
+	unsigned char map = 0, flags;
+
+	for (i = 0; i < p->channel_count; i++)
+		map |= 1 << p->channels[i];
+
+	flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
+	pnp_register_dma_resource(dev, option_flags, map, flags);
+}
+
+static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
+					    unsigned int option_flags,
+					    struct acpi_resource_irq *p)
+{
+	int i;
+	pnp_irq_mask_t map;
+	unsigned char flags;
+
+	bitmap_zero(map.bits, PNP_IRQ_NR);
+	for (i = 0; i < p->interrupt_count; i++)
+		if (p->interrupts[i])
+			__set_bit(p->interrupts[i], map.bits);
+
+	flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
+	pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
+					unsigned int option_flags,
+					struct acpi_resource_extended_irq *p)
+{
+	int i;
+	pnp_irq_mask_t map;
+	unsigned char flags;
+
+	bitmap_zero(map.bits, PNP_IRQ_NR);
+	for (i = 0; i < p->interrupt_count; i++) {
+		if (p->interrupts[i]) {
+			if (p->interrupts[i] < PNP_IRQ_NR)
+				__set_bit(p->interrupts[i], map.bits);
+			else
+				dev_err(&dev->dev,
+					"ignoring IRQ %d option (too large for %d entry bitmap)\n",
+					p->interrupts[i], PNP_IRQ_NR);
+		}
+	}
+
+	flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
+	pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
+					     unsigned int option_flags,
+					     struct acpi_resource_io *io)
+{
+	unsigned char flags = 0;
+
+	if (io->io_decode == ACPI_DECODE_16)
+		flags = IORESOURCE_IO_16BIT_ADDR;
+	pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
+				   io->alignment, io->address_length, flags);
+}
+
+static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
+					unsigned int option_flags,
+					struct acpi_resource_fixed_io *io)
+{
+	pnp_register_port_resource(dev, option_flags, io->address, io->address,
+				   0, io->address_length, IORESOURCE_IO_FIXED);
+}
+
+static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
+					      unsigned int option_flags,
+					      struct acpi_resource_memory24 *p)
+{
+	unsigned char flags = 0;
+
+	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+		flags = IORESOURCE_MEM_WRITEABLE;
+	pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
+				  p->alignment, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
+					      unsigned int option_flags,
+					      struct acpi_resource_memory32 *p)
+{
+	unsigned char flags = 0;
+
+	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+		flags = IORESOURCE_MEM_WRITEABLE;
+	pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
+				  p->alignment, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
+					unsigned int option_flags,
+					struct acpi_resource_fixed_memory32 *p)
+{
+	unsigned char flags = 0;
+
+	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+		flags = IORESOURCE_MEM_WRITEABLE;
+	pnp_register_mem_resource(dev, option_flags, p->address, p->address,
+				  0, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
+						unsigned int option_flags,
+						struct acpi_resource *r)
+{
+	struct acpi_resource_address64 addr, *p = &addr;
+	acpi_status status;
+	unsigned char flags = 0;
+
+	status = acpi_resource_to_address64(r, p);
+	if (ACPI_FAILURE(status)) {
+		dev_warn(&dev->dev, "can't convert resource type %d\n",
+			 r->type);
+		return;
+	}
+
+	if (p->resource_type == ACPI_MEMORY_RANGE) {
+		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
+			flags = IORESOURCE_MEM_WRITEABLE;
+		pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+					  p->address.minimum, 0, p->address.address_length,
+					  flags);
+	} else if (p->resource_type == ACPI_IO_RANGE)
+		pnp_register_port_resource(dev, option_flags, p->address.minimum,
+					   p->address.minimum, 0, p->address.address_length,
+					   IORESOURCE_IO_FIXED);
+}
+
+static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
+						    unsigned int option_flags,
+						    struct acpi_resource *r)
+{
+	struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
+	unsigned char flags = 0;
+
+	if (p->resource_type == ACPI_MEMORY_RANGE) {
+		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
+			flags = IORESOURCE_MEM_WRITEABLE;
+		pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+					  p->address.minimum, 0, p->address.address_length,
+					  flags);
+	} else if (p->resource_type == ACPI_IO_RANGE)
+		pnp_register_port_resource(dev, option_flags, p->address.minimum,
+					   p->address.minimum, 0, p->address.address_length,
+					   IORESOURCE_IO_FIXED);
+}
+
+struct acpipnp_parse_option_s {
+	struct pnp_dev *dev;
+	unsigned int option_flags;
+};
+
+static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
+						  void *data)
+{
+	int priority;
+	struct acpipnp_parse_option_s *parse_data = data;
+	struct pnp_dev *dev = parse_data->dev;
+	unsigned int option_flags = parse_data->option_flags;
+
+	switch (res->type) {
+	case ACPI_RESOURCE_TYPE_IRQ:
+		pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
+		break;
+
+	case ACPI_RESOURCE_TYPE_DMA:
+		pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
+		break;
+
+	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+		switch (res->data.start_dpf.compatibility_priority) {
+		case ACPI_GOOD_CONFIGURATION:
+			priority = PNP_RES_PRIORITY_PREFERRED;
+			break;
+
+		case ACPI_ACCEPTABLE_CONFIGURATION:
+			priority = PNP_RES_PRIORITY_ACCEPTABLE;
+			break;
+
+		case ACPI_SUB_OPTIMAL_CONFIGURATION:
+			priority = PNP_RES_PRIORITY_FUNCTIONAL;
+			break;
+		default:
+			priority = PNP_RES_PRIORITY_INVALID;
+			break;
+		}
+		parse_data->option_flags = pnp_new_dependent_set(dev, priority);
+		break;
+
+	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+		parse_data->option_flags = 0;
+		break;
+
+	case ACPI_RESOURCE_TYPE_IO:
+		pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
+		break;
+
+	case ACPI_RESOURCE_TYPE_FIXED_IO:
+		pnpacpi_parse_fixed_port_option(dev, option_flags,
+					        &res->data.fixed_io);
+		break;
+
+	case ACPI_RESOURCE_TYPE_VENDOR:
+	case ACPI_RESOURCE_TYPE_END_TAG:
+		break;
+
+	case ACPI_RESOURCE_TYPE_MEMORY24:
+		pnpacpi_parse_mem24_option(dev, option_flags,
+					   &res->data.memory24);
+		break;
+
+	case ACPI_RESOURCE_TYPE_MEMORY32:
+		pnpacpi_parse_mem32_option(dev, option_flags,
+					   &res->data.memory32);
+		break;
+
+	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+		pnpacpi_parse_fixed_mem32_option(dev, option_flags,
+						 &res->data.fixed_memory32);
+		break;
+
+	case ACPI_RESOURCE_TYPE_ADDRESS16:
+	case ACPI_RESOURCE_TYPE_ADDRESS32:
+	case ACPI_RESOURCE_TYPE_ADDRESS64:
+		pnpacpi_parse_address_option(dev, option_flags, res);
+		break;
+
+	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+		pnpacpi_parse_ext_address_option(dev, option_flags, res);
+		break;
+
+	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+		pnpacpi_parse_ext_irq_option(dev, option_flags,
+					     &res->data.extended_irq);
+		break;
+
+	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+		break;
+
+	default:
+		dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
+			 res->type);
+		return AE_ERROR;
+	}
+
+	return AE_OK;
+}
+
+int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
+{
+	struct acpi_device *acpi_dev = dev->data;
+	acpi_handle handle = acpi_dev->handle;
+	acpi_status status;
+	struct acpipnp_parse_option_s parse_data;
+
+	pnp_dbg(&dev->dev, "parse resource options\n");
+
+	parse_data.dev = dev;
+	parse_data.option_flags = 0;
+
+	status = acpi_walk_resources(handle, METHOD_NAME__PRS,
+				     pnpacpi_option_resource, &parse_data);
+
+	if (ACPI_FAILURE(status)) {
+		if (status != AE_NOT_FOUND)
+			dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
+		return -EPERM;
+	}
+	return 0;
+}
+
+static int pnpacpi_supported_resource(struct acpi_resource *res)
+{
+	switch (res->type) {
+	case ACPI_RESOURCE_TYPE_IRQ:
+	case ACPI_RESOURCE_TYPE_DMA:
+	case ACPI_RESOURCE_TYPE_IO:
+	case ACPI_RESOURCE_TYPE_FIXED_IO:
+	case ACPI_RESOURCE_TYPE_MEMORY24:
+	case ACPI_RESOURCE_TYPE_MEMORY32:
+	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+	case ACPI_RESOURCE_TYPE_ADDRESS16:
+	case ACPI_RESOURCE_TYPE_ADDRESS32:
+	case ACPI_RESOURCE_TYPE_ADDRESS64:
+	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+		return 1;
+	}
+	return 0;
+}
+
+/*
+ * Set resource
+ */
+static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
+					   void *data)
+{
+	int *res_cnt = data;
+
+	if (pnpacpi_supported_resource(res))
+		(*res_cnt)++;
+	return AE_OK;
+}
+
+static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
+{
+	struct acpi_resource **resource = data;
+
+	if (pnpacpi_supported_resource(res)) {
+		(*resource)->type = res->type;
+		(*resource)->length = sizeof(struct acpi_resource);
+		if (res->type == ACPI_RESOURCE_TYPE_IRQ)
+			(*resource)->data.irq.descriptor_length =
+					res->data.irq.descriptor_length;
+		(*resource)++;
+	}
+
+	return AE_OK;
+}
+
+int pnpacpi_build_resource_template(struct pnp_dev *dev,
+				    struct acpi_buffer *buffer)
+{
+	struct acpi_device *acpi_dev = dev->data;
+	acpi_handle handle = acpi_dev->handle;
+	struct acpi_resource *resource;
+	int res_cnt = 0;
+	acpi_status status;
+
+	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+				     pnpacpi_count_resources, &res_cnt);
+	if (ACPI_FAILURE(status)) {
+		dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
+		return -EINVAL;
+	}
+	if (!res_cnt)
+		return -EINVAL;
+	buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
+	buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
+	if (!buffer->pointer)
+		return -ENOMEM;
+
+	resource = (struct acpi_resource *)buffer->pointer;
+	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+				     pnpacpi_type_resources, &resource);
+	if (ACPI_FAILURE(status)) {
+		kfree(buffer->pointer);
+		dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
+		return -EINVAL;
+	}
+	/* resource will pointer the end resource now */
+	resource->type = ACPI_RESOURCE_TYPE_END_TAG;
+	resource->length = sizeof(struct acpi_resource);
+
+	return 0;
+}
+
+static void pnpacpi_encode_irq(struct pnp_dev *dev,
+			       struct acpi_resource *resource,
+			       struct resource *p)
+{
+	struct acpi_resource_irq *irq = &resource->data.irq;
+	u8 triggering, polarity, shareable;
+
+	if (!pnp_resource_enabled(p)) {
+		irq->interrupt_count = 0;
+		pnp_dbg(&dev->dev, "  encode irq (%s)\n",
+			p ? "disabled" : "missing");
+		return;
+	}
+
+	decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
+	irq->triggering = triggering;
+	irq->polarity = polarity;
+	irq->shareable = shareable;
+	irq->interrupt_count = 1;
+	irq->interrupts[0] = p->start;
+
+	pnp_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
+		(int) p->start,
+		triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
+		polarity == ACPI_ACTIVE_LOW ? "low" : "high",
+		irq->shareable == ACPI_SHARED ? "shared" : "exclusive",
+		irq->descriptor_length);
+}
+
+static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
+				   struct acpi_resource *resource,
+				   struct resource *p)
+{
+	struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
+	u8 triggering, polarity, shareable;
+
+	if (!pnp_resource_enabled(p)) {
+		extended_irq->interrupt_count = 0;
+		pnp_dbg(&dev->dev, "  encode extended irq (%s)\n",
+			p ? "disabled" : "missing");
+		return;
+	}
+
+	decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
+	extended_irq->producer_consumer = ACPI_CONSUMER;
+	extended_irq->triggering = triggering;
+	extended_irq->polarity = polarity;
+	extended_irq->shareable = shareable;
+	extended_irq->interrupt_count = 1;
+	extended_irq->interrupts[0] = p->start;
+
+	pnp_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
+		triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
+		polarity == ACPI_ACTIVE_LOW ? "low" : "high",
+		extended_irq->shareable == ACPI_SHARED ? "shared" : "exclusive");
+}
+
+static void pnpacpi_encode_dma(struct pnp_dev *dev,
+			       struct acpi_resource *resource,
+			       struct resource *p)
+{
+	struct acpi_resource_dma *dma = &resource->data.dma;
+
+	if (!pnp_resource_enabled(p)) {
+		dma->channel_count = 0;
+		pnp_dbg(&dev->dev, "  encode dma (%s)\n",
+			p ? "disabled" : "missing");
+		return;
+	}
+
+	/* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
+	switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
+	case IORESOURCE_DMA_TYPEA:
+		dma->type = ACPI_TYPE_A;
+		break;
+	case IORESOURCE_DMA_TYPEB:
+		dma->type = ACPI_TYPE_B;
+		break;
+	case IORESOURCE_DMA_TYPEF:
+		dma->type = ACPI_TYPE_F;
+		break;
+	default:
+		dma->type = ACPI_COMPATIBILITY;
+	}
+
+	switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
+	case IORESOURCE_DMA_8BIT:
+		dma->transfer = ACPI_TRANSFER_8;
+		break;
+	case IORESOURCE_DMA_8AND16BIT:
+		dma->transfer = ACPI_TRANSFER_8_16;
+		break;
+	default:
+		dma->transfer = ACPI_TRANSFER_16;
+	}
+
+	dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
+	dma->channel_count = 1;
+	dma->channels[0] = p->start;
+
+	pnp_dbg(&dev->dev, "  encode dma %d "
+		"type %#x transfer %#x master %d\n",
+		(int) p->start, dma->type, dma->transfer, dma->bus_master);
+}
+
+static void pnpacpi_encode_io(struct pnp_dev *dev,
+			      struct acpi_resource *resource,
+			      struct resource *p)
+{
+	struct acpi_resource_io *io = &resource->data.io;
+
+	if (pnp_resource_enabled(p)) {
+		/* Note: pnp_assign_port copies pnp_port->flags into p->flags */
+		io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
+		    ACPI_DECODE_16 : ACPI_DECODE_10;
+		io->minimum = p->start;
+		io->maximum = p->end;
+		io->alignment = 0;	/* Correct? */
+		io->address_length = resource_size(p);
+	} else {
+		io->minimum = 0;
+		io->address_length = 0;
+	}
+
+	pnp_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
+		io->minimum + io->address_length - 1, io->io_decode);
+}
+
+static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
+				    struct acpi_resource *resource,
+				    struct resource *p)
+{
+	struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
+
+	if (pnp_resource_enabled(p)) {
+		fixed_io->address = p->start;
+		fixed_io->address_length = resource_size(p);
+	} else {
+		fixed_io->address = 0;
+		fixed_io->address_length = 0;
+	}
+
+	pnp_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
+		fixed_io->address + fixed_io->address_length - 1);
+}
+
+static void pnpacpi_encode_mem24(struct pnp_dev *dev,
+				 struct acpi_resource *resource,
+				 struct resource *p)
+{
+	struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
+
+	if (pnp_resource_enabled(p)) {
+		/* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
+		memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
+		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+		memory24->minimum = p->start;
+		memory24->maximum = p->end;
+		memory24->alignment = 0;
+		memory24->address_length = resource_size(p);
+	} else {
+		memory24->minimum = 0;
+		memory24->address_length = 0;
+	}
+
+	pnp_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
+		memory24->minimum,
+		memory24->minimum + memory24->address_length - 1,
+		memory24->write_protect);
+}
+
+static void pnpacpi_encode_mem32(struct pnp_dev *dev,
+				 struct acpi_resource *resource,
+				 struct resource *p)
+{
+	struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
+
+	if (pnp_resource_enabled(p)) {
+		memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
+		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+		memory32->minimum = p->start;
+		memory32->maximum = p->end;
+		memory32->alignment = 0;
+		memory32->address_length = resource_size(p);
+	} else {
+		memory32->minimum = 0;
+		memory32->alignment = 0;
+	}
+
+	pnp_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
+		memory32->minimum,
+		memory32->minimum + memory32->address_length - 1,
+		memory32->write_protect);
+}
+
+static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
+				       struct acpi_resource *resource,
+				       struct resource *p)
+{
+	struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
+
+	if (pnp_resource_enabled(p)) {
+		fixed_memory32->write_protect =
+		    p->flags & IORESOURCE_MEM_WRITEABLE ?
+		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+		fixed_memory32->address = p->start;
+		fixed_memory32->address_length = resource_size(p);
+	} else {
+		fixed_memory32->address = 0;
+		fixed_memory32->address_length = 0;
+	}
+
+	pnp_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
+		fixed_memory32->address,
+		fixed_memory32->address + fixed_memory32->address_length - 1,
+		fixed_memory32->write_protect);
+}
+
+int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
+{
+	int i = 0;
+	/* pnpacpi_build_resource_template allocates extra mem */
+	int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
+	struct acpi_resource *resource = buffer->pointer;
+	unsigned int port = 0, irq = 0, dma = 0, mem = 0;
+
+	pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
+	while (i < res_cnt) {
+		switch (resource->type) {
+		case ACPI_RESOURCE_TYPE_IRQ:
+			pnpacpi_encode_irq(dev, resource,
+			       pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+			irq++;
+			break;
+
+		case ACPI_RESOURCE_TYPE_DMA:
+			pnpacpi_encode_dma(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_DMA, dma));
+			dma++;
+			break;
+		case ACPI_RESOURCE_TYPE_IO:
+			pnpacpi_encode_io(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_IO, port));
+			port++;
+			break;
+		case ACPI_RESOURCE_TYPE_FIXED_IO:
+			pnpacpi_encode_fixed_io(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_IO, port));
+			port++;
+			break;
+		case ACPI_RESOURCE_TYPE_MEMORY24:
+			pnpacpi_encode_mem24(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+		case ACPI_RESOURCE_TYPE_MEMORY32:
+			pnpacpi_encode_mem32(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+		case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+			pnpacpi_encode_fixed_mem32(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+		case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+			pnpacpi_encode_ext_irq(dev, resource,
+				pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+			irq++;
+			break;
+		case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+		case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+		case ACPI_RESOURCE_TYPE_VENDOR:
+		case ACPI_RESOURCE_TYPE_END_TAG:
+		case ACPI_RESOURCE_TYPE_ADDRESS16:
+		case ACPI_RESOURCE_TYPE_ADDRESS32:
+		case ACPI_RESOURCE_TYPE_ADDRESS64:
+		case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+		case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+		default:	/* other type */
+			dev_warn(&dev->dev,
+				 "can't encode unknown resource type %d\n",
+				 resource->type);
+			return -EINVAL;
+		}
+		resource++;
+		i++;
+	}
+	return 0;
+}
diff --git a/drivers/pnp/pnpbios/Kconfig b/drivers/pnp/pnpbios/Kconfig
new file mode 100644
index 000000000..bcdac269a
--- /dev/null
+++ b/drivers/pnp/pnpbios/Kconfig
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Plug and Play BIOS configuration
+#
+config PNPBIOS
+	bool "Plug and Play BIOS support"
+	depends on ISA && X86_32
+	default n
+	help
+	  Linux uses the PNPBIOS as defined in "Plug and Play BIOS
+	  Specification Version 1.0A May 5, 1994" to autodetect built-in
+	  mainboard resources (e.g. parallel port resources).
+
+	  Some features (e.g. event notification, docking station information,
+	  ISAPNP services) are not currently implemented.
+
+	  If you would like the kernel to detect and allocate resources to
+	  your mainboard devices (on some systems they are disabled by the
+	  BIOS) say Y here.  Also the PNPBIOS can help prevent resource
+	  conflicts between mainboard devices and other bus devices.
+
+	  Note: ACPI is expected to supersede PNPBIOS some day, currently it
+	  co-exists nicely.  If you have a non-ISA system that supports ACPI,
+	  you probably don't need PNPBIOS support.
+
+config PNPBIOS_PROC_FS
+	bool "Plug and Play BIOS /proc interface"
+	depends on PNPBIOS && PROC_FS
+	help
+	  If you say Y here and to "/proc file system support", you will be
+	  able to directly access the PNPBIOS.  This includes resource
+	  allocation, ESCD, and other PNPBIOS services.  Using this
+	  interface is potentially dangerous because the PNPBIOS driver will
+	  not be notified of any resource changes made by writing directly.
+	  Also some buggy systems will fault when accessing certain features
+	  in the PNPBIOS /proc interface (e.g. "boot" configs).
+
+	  See the latest pcmcia-cs (stand-alone package) for a nice set of
+	  PNPBIOS /proc interface tools (lspnp and setpnp).
+
+	  Unless you are debugging or have other specific reasons, it is
+	  recommended that you say N here.
+
diff --git a/drivers/pnp/pnpbios/Makefile b/drivers/pnp/pnpbios/Makefile
new file mode 100644
index 000000000..a91437c56
--- /dev/null
+++ b/drivers/pnp/pnpbios/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the kernel PNPBIOS driver.
+#
+obj-y := pnp.o
+
+pnp-y := core.o bioscalls.o rsparser.o
+
+pnp-$(CONFIG_PNPBIOS_PROC_FS) += proc.o
diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
new file mode 100644
index 000000000..ba5cfc3db
--- /dev/null
+++ b/drivers/pnp/pnpbios/bioscalls.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bioscalls.c - the lowlevel layer of the PnPBIOS driver
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/byteorder.h>
+
+#include "pnpbios.h"
+
+__visible struct {
+	u16 offset;
+	u16 segment;
+} pnp_bios_callpoint;
+
+/*
+ * These are some opcodes for a "static asmlinkage"
+ * As this code is *not* executed inside the linux kernel segment, but in a
+ * alias at offset 0, we need a far return that can not be compiled by
+ * default (please, prove me wrong! this is *really* ugly!)
+ * This is the only way to get the bios to return into the kernel code,
+ * because the bios code runs in 16 bit protected mode and therefore can only
+ * return to the caller if the call is within the first 64kB, and the linux
+ * kernel begins at offset 3GB...
+ */
+
+asmlinkage __visible void pnp_bios_callfunc(void);
+
+__asm__(".text			\n"
+	__ALIGN_STR "\n"
+	".globl pnp_bios_callfunc\n"
+	"pnp_bios_callfunc:\n"
+	"	pushl %edx	\n"
+	"	pushl %ecx	\n"
+	"	pushl %ebx	\n"
+	"	pushl %eax	\n"
+	"	lcallw *pnp_bios_callpoint\n"
+	"	addl $16, %esp	\n"
+	"	lret		\n"
+	".previous		\n");
+
+#define Q2_SET_SEL(cpu, selname, address, size) \
+do { \
+	struct desc_struct *gdt = get_cpu_gdt_rw((cpu)); \
+	set_desc_base(&gdt[(selname) >> 3], (u32)(address)); \
+	set_desc_limit(&gdt[(selname) >> 3], (size) - 1); \
+} while(0)
+
+static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
+			(unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
+
+/*
+ * At some point we want to use this stack frame pointer to unwind
+ * after PnP BIOS oopses.
+ */
+
+__visible u32 pnp_bios_fault_esp;
+__visible u32 pnp_bios_fault_eip;
+__visible u32 pnp_bios_is_utter_crap = 0;
+
+static spinlock_t pnp_bios_lock;
+
+/*
+ * Support Functions
+ */
+
+static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
+				u16 arg4, u16 arg5, u16 arg6, u16 arg7,
+				void *ts1_base, u32 ts1_size,
+				void *ts2_base, u32 ts2_size)
+{
+	unsigned long flags;
+	u16 status;
+	struct desc_struct save_desc_40;
+	int cpu;
+
+	/*
+	 * PnP BIOSes are generally not terribly re-entrant.
+	 * Also, don't rely on them to save everything correctly.
+	 */
+	if (pnp_bios_is_utter_crap)
+		return PNP_FUNCTION_NOT_SUPPORTED;
+
+	cpu = get_cpu();
+	save_desc_40 = get_cpu_gdt_rw(cpu)[0x40 / 8];
+	get_cpu_gdt_rw(cpu)[0x40 / 8] = bad_bios_desc;
+
+	/* On some boxes IRQ's during PnP BIOS calls are deadly.  */
+	spin_lock_irqsave(&pnp_bios_lock, flags);
+
+	/* The lock prevents us bouncing CPU here */
+	if (ts1_size)
+		Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
+	if (ts2_size)
+		Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
+
+	__asm__ __volatile__("pushl %%ebp\n\t"
+			     "pushl %%edi\n\t"
+			     "pushl %%esi\n\t"
+			     "pushl %%ds\n\t"
+			     "pushl %%es\n\t"
+			     "pushl %%fs\n\t"
+			     "pushl %%gs\n\t"
+			     "pushfl\n\t"
+			     "movl %%esp, pnp_bios_fault_esp\n\t"
+			     "movl $1f, pnp_bios_fault_eip\n\t"
+			     "lcall %5,%6\n\t"
+			     "1:popfl\n\t"
+			     "popl %%gs\n\t"
+			     "popl %%fs\n\t"
+			     "popl %%es\n\t"
+			     "popl %%ds\n\t"
+			     "popl %%esi\n\t"
+			     "popl %%edi\n\t"
+			     "popl %%ebp\n\t":"=a"(status)
+			     :"0"((func) | (((u32) arg1) << 16)),
+			     "b"((arg2) | (((u32) arg3) << 16)),
+			     "c"((arg4) | (((u32) arg5) << 16)),
+			     "d"((arg6) | (((u32) arg7) << 16)),
+			     "i"(PNP_CS32), "i"(0)
+			     :"memory");
+	spin_unlock_irqrestore(&pnp_bios_lock, flags);
+
+	get_cpu_gdt_rw(cpu)[0x40 / 8] = save_desc_40;
+	put_cpu();
+
+	/* If we get here and this is set then the PnP BIOS faulted on us. */
+	if (pnp_bios_is_utter_crap) {
+		printk(KERN_ERR
+		       "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
+		printk(KERN_ERR
+		       "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
+		printk(KERN_ERR
+		       "PnPBIOS: Check with your vendor for an updated BIOS\n");
+	}
+
+	return status;
+}
+
+void pnpbios_print_status(const char *module, u16 status)
+{
+	switch (status) {
+	case PNP_SUCCESS:
+		printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
+		break;
+	case PNP_NOT_SET_STATICALLY:
+		printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n",
+		       module);
+		break;
+	case PNP_UNKNOWN_FUNCTION:
+		printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n",
+		       module);
+		break;
+	case PNP_FUNCTION_NOT_SUPPORTED:
+		printk(KERN_ERR
+		       "PnPBIOS: %s: function not supported on this system\n",
+		       module);
+		break;
+	case PNP_INVALID_HANDLE:
+		printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
+		break;
+	case PNP_BAD_PARAMETER:
+		printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n",
+		       module);
+		break;
+	case PNP_SET_FAILED:
+		printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n",
+		       module);
+		break;
+	case PNP_EVENTS_NOT_PENDING:
+		printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
+		break;
+	case PNP_SYSTEM_NOT_DOCKED:
+		printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n",
+		       module);
+		break;
+	case PNP_NO_ISA_PNP_CARDS:
+		printk(KERN_ERR
+		       "PnPBIOS: %s: no isapnp cards are installed on this system\n",
+		       module);
+		break;
+	case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
+		printk(KERN_ERR
+		       "PnPBIOS: %s: cannot determine the capabilities of the docking station\n",
+		       module);
+		break;
+	case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
+		printk(KERN_ERR
+		       "PnPBIOS: %s: unable to undock, the system does not have a battery\n",
+		       module);
+		break;
+	case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
+		printk(KERN_ERR
+		       "PnPBIOS: %s: could not dock due to resource conflicts\n",
+		       module);
+		break;
+	case PNP_BUFFER_TOO_SMALL:
+		printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n",
+		       module);
+		break;
+	case PNP_USE_ESCD_SUPPORT:
+		printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
+		break;
+	case PNP_MESSAGE_NOT_SUPPORTED:
+		printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n",
+		       module);
+		break;
+	case PNP_HARDWARE_ERROR:
+		printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n",
+		       module);
+		break;
+	default:
+		printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module,
+		       status);
+		break;
+	}
+}
+
+/*
+ * PnP BIOS Low Level Calls
+ */
+
+#define PNP_GET_NUM_SYS_DEV_NODES		0x00
+#define PNP_GET_SYS_DEV_NODE			0x01
+#define PNP_SET_SYS_DEV_NODE			0x02
+#define PNP_GET_EVENT				0x03
+#define PNP_SEND_MESSAGE			0x04
+#define PNP_GET_DOCKING_STATION_INFORMATION	0x05
+#define PNP_SET_STATIC_ALLOCED_RES_INFO		0x09
+#define PNP_GET_STATIC_ALLOCED_RES_INFO		0x0a
+#define PNP_GET_APM_ID_TABLE			0x0b
+#define PNP_GET_PNP_ISA_CONFIG_STRUC		0x40
+#define PNP_GET_ESCD_INFO			0x41
+#define PNP_READ_ESCD				0x42
+#define PNP_WRITE_ESCD				0x43
+
+/*
+ * Call PnP BIOS with function 0x00, "get number of system device nodes"
+ */
+static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2,
+			       PNP_TS1, PNP_DS, 0, 0, data,
+			       sizeof(struct pnp_dev_node_info), NULL, 0);
+	data->no_nodes &= 0xff;
+	return status;
+}
+
+int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+	int status = __pnp_bios_dev_node_info(data);
+
+	if (status)
+		pnpbios_print_status("dev_node_info", status);
+	return status;
+}
+
+/*
+ * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible
+ * death if they are asked to access the "current" configuration.
+ * Therefore, if it's a matter of indifference, it's better to call
+ * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0.
+ */
+
+/* 
+ * Call PnP BIOS with function 0x01, "get system device node"
+ * Input: *nodenum = desired node,
+ *        boot = whether to get nonvolatile boot (!=0)
+ *               or volatile current (0) config
+ * Output: *nodenum=next node or 0xff if no more nodes
+ */
+static int __pnp_bios_get_dev_node(u8 *nodenum, char boot,
+				   struct pnp_bios_node *data)
+{
+	u16 status;
+	u16 tmp_nodenum;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	if (!boot && pnpbios_dont_use_current_config)
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	tmp_nodenum = *nodenum;
+	status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2,
+			       boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum,
+			       sizeof(tmp_nodenum), data, 65536);
+	*nodenum = tmp_nodenum;
+	return status;
+}
+
+int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+{
+	int status;
+
+	status = __pnp_bios_get_dev_node(nodenum, boot, data);
+	if (status)
+		pnpbios_print_status("get_dev_node", status);
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x02, "set system device node"
+ * Input: *nodenum = desired node, 
+ *        boot = whether to set nonvolatile boot (!=0)
+ *               or volatile current (0) config
+ */
+static int __pnp_bios_set_dev_node(u8 nodenum, char boot,
+				   struct pnp_bios_node *data)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	if (!boot && pnpbios_dont_use_current_config)
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1,
+			       boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL,
+			       0);
+	return status;
+}
+
+int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+{
+	int status;
+
+	status = __pnp_bios_set_dev_node(nodenum, boot, data);
+	if (status) {
+		pnpbios_print_status("set_dev_node", status);
+		return status;
+	}
+	if (!boot) {		/* Update devlist */
+		status = pnp_bios_get_dev_node(&nodenum, boot, data);
+		if (status)
+			return status;
+	}
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x05, "get docking station information"
+ */
+int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1,
+			       PNP_DS, 0, 0, 0, 0, data,
+			       sizeof(struct pnp_docking_station_info), NULL,
+			       0);
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x0a, "get statically allocated resource
+ * information"
+ */
+static int __pnp_bios_get_stat_res(char *info)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1,
+			       PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0);
+	return status;
+}
+
+int pnp_bios_get_stat_res(char *info)
+{
+	int status;
+
+	status = __pnp_bios_get_stat_res(info);
+	if (status)
+		pnpbios_print_status("get_stat_res", status);
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
+ */
+static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS,
+			       0, 0, 0, 0, data,
+			       sizeof(struct pnp_isa_config_struc), NULL, 0);
+	return status;
+}
+
+int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+	int status;
+
+	status = __pnp_bios_isapnp_config(data);
+	if (status)
+		pnpbios_print_status("isapnp_config", status);
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x41, "get ESCD info"
+ */
+static int __pnp_bios_escd_info(struct escd_info_struc *data)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4,
+			       PNP_TS1, PNP_DS, data,
+			       sizeof(struct escd_info_struc), NULL, 0);
+	return status;
+}
+
+int pnp_bios_escd_info(struct escd_info_struc *data)
+{
+	int status;
+
+	status = __pnp_bios_escd_info(data);
+	if (status)
+		pnpbios_print_status("escd_info", status);
+	return status;
+}
+
+/*
+ * Call PnP BIOS function 0x42, "read ESCD"
+ * nvram_base is determined by calling escd_info
+ */
+static int __pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+	u16 status;
+
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0,
+			       0, data, 65536, __va(nvram_base), 65536);
+	return status;
+}
+
+int pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+	int status;
+
+	status = __pnp_bios_read_escd(data, nvram_base);
+	if (status)
+		pnpbios_print_status("read_escd", status);
+	return status;
+}
+
+void pnpbios_calls_init(union pnp_bios_install_struct *header)
+{
+	int i;
+
+	spin_lock_init(&pnp_bios_lock);
+	pnp_bios_callpoint.offset = header->fields.pm16offset;
+	pnp_bios_callpoint.segment = PNP_CS16;
+
+	for_each_possible_cpu(i) {
+		struct desc_struct *gdt = get_cpu_gdt_rw(i);
+		if (!gdt)
+			continue;
+		set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS32],
+			 (unsigned long)&pnp_bios_callfunc);
+		set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS16],
+			 (unsigned long)__va(header->fields.pm16cseg));
+		set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_DS],
+			 (unsigned long)__va(header->fields.pm16dseg));
+	}
+}
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
new file mode 100644
index 000000000..9b760e73e
--- /dev/null
+++ b/drivers/pnp/pnpbios/core.c
@@ -0,0 +1,577 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * pnpbios -- PnP BIOS driver
+ *
+ * This driver provides access to Plug-'n'-Play services provided by
+ * the PnP BIOS firmware, described in the following documents:
+ *   Plug and Play BIOS Specification, Version 1.0A, 5 May 1994
+ *   Plug and Play BIOS Clarification Paper, 6 October 1994
+ *     Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corp.
+ * 
+ * Originally (C) 1998 Christian Schmidt <schmidt@digadd.de>
+ * Modifications (C) 1998 Tom Lees <tom@lpsg.demon.co.uk>
+ * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net>
+ * Further modifications (C) 2001, 2002 by:
+ *   Alan Cox <alan@redhat.com>
+ *   Thomas Hood
+ *   Brian Gerst <bgerst@didntduck.org>
+ *
+ * Ported to the PnP Layer and several additional improvements (C) 2002
+ * by Adam Belay <ambx1@neo.rr.com>
+ */
+
+/* Change Log
+ *
+ * Adam Belay - <ambx1@neo.rr.com> - March 16, 2003
+ * rev 1.01	Only call pnp_bios_dev_node_info once
+ *		Added pnpbios_print_status
+ *		Added several new error messages and info messages
+ *		Added pnpbios_interface_attach_device
+ *		integrated core and proc init system
+ *		Introduced PNPMODE flags
+ *		Removed some useless includes
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+#include <linux/freezer.h>
+#include <linux/kmod.h>
+#include <linux/kthread.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/byteorder.h>
+
+#include "../base.h"
+#include "pnpbios.h"
+
+/*
+ *
+ * PnP BIOS INTERFACE
+ *
+ */
+
+static union pnp_bios_install_struct *pnp_bios_install = NULL;
+
+int pnp_bios_present(void)
+{
+	return (pnp_bios_install != NULL);
+}
+
+struct pnp_dev_node_info node_info;
+
+/*
+ *
+ * DOCKING FUNCTIONS
+ *
+ */
+
+static struct completion unload_sem;
+
+/*
+ * (Much of this belongs in a shared routine somewhere)
+ */
+static int pnp_dock_event(int dock, struct pnp_docking_station_info *info)
+{
+	static char const sbin_pnpbios[] = "/sbin/pnpbios";
+	char *argv[3], **envp, *buf, *scratch;
+	int i = 0, value;
+
+	if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL)))
+		return -ENOMEM;
+	if (!(buf = kzalloc(256, GFP_KERNEL))) {
+		kfree(envp);
+		return -ENOMEM;
+	}
+
+	/* FIXME: if there are actual users of this, it should be
+	 * integrated into the driver core and use the usual infrastructure
+	 * like sysfs and uevents
+	 */
+	argv[0] = (char *)sbin_pnpbios;
+	argv[1] = "dock";
+	argv[2] = NULL;
+
+	/* minimal command environment */
+	envp[i++] = "HOME=/";
+	envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+
+#ifdef	DEBUG
+	/* hint that policy agent should enter no-stdout debug mode */
+	envp[i++] = "DEBUG=kernel";
+#endif
+	/* extensible set of named bus-specific parameters,
+	 * supporting multiple driver selection algorithms.
+	 */
+	scratch = buf;
+
+	/* action:  add, remove */
+	envp[i++] = scratch;
+	scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1;
+
+	/* Report the ident for the dock */
+	envp[i++] = scratch;
+	scratch += sprintf(scratch, "DOCK=%x/%x/%x",
+			   info->location_id, info->serial, info->capabilities);
+	envp[i] = NULL;
+
+	value = call_usermodehelper(sbin_pnpbios, argv, envp, UMH_WAIT_EXEC);
+	kfree(buf);
+	kfree(envp);
+	return 0;
+}
+
+/*
+ * Poll the PnP docking at regular intervals
+ */
+static int pnp_dock_thread(void *unused)
+{
+	static struct pnp_docking_station_info now;
+	int docked = -1, d = 0;
+
+	set_freezable();
+	while (1) {
+		int status;
+
+		/*
+		 * Poll every 2 seconds
+		 */
+		msleep_interruptible(2000);
+
+		if (try_to_freeze())
+			continue;
+
+		status = pnp_bios_dock_station_info(&now);
+
+		switch (status) {
+			/*
+			 * No dock to manage
+			 */
+		case PNP_FUNCTION_NOT_SUPPORTED:
+			complete_and_exit(&unload_sem, 0);
+		case PNP_SYSTEM_NOT_DOCKED:
+			d = 0;
+			break;
+		case PNP_SUCCESS:
+			d = 1;
+			break;
+		default:
+			pnpbios_print_status("pnp_dock_thread", status);
+			printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n");
+			complete_and_exit(&unload_sem, 0);
+		}
+		if (d != docked) {
+			if (pnp_dock_event(d, &now) == 0) {
+				docked = d;
+#if 0
+				printk(KERN_INFO
+				       "PnPBIOS: Docking station %stached\n",
+				       docked ? "at" : "de");
+#endif
+			}
+		}
+	}
+	complete_and_exit(&unload_sem, 0);
+}
+
+static int pnpbios_get_resources(struct pnp_dev *dev)
+{
+	u8 nodenum = dev->number;
+	struct pnp_bios_node *node;
+
+	if (!pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	pnp_dbg(&dev->dev, "get resources\n");
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -1;
+	if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+		kfree(node);
+		return -ENODEV;
+	}
+	pnpbios_read_resources_from_node(dev, node);
+	dev->active = pnp_is_active(dev);
+	kfree(node);
+	return 0;
+}
+
+static int pnpbios_set_resources(struct pnp_dev *dev)
+{
+	u8 nodenum = dev->number;
+	struct pnp_bios_node *node;
+	int ret;
+
+	if (!pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	pnp_dbg(&dev->dev, "set resources\n");
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -1;
+	if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+		kfree(node);
+		return -ENODEV;
+	}
+	if (pnpbios_write_resources_to_node(dev, node) < 0) {
+		kfree(node);
+		return -1;
+	}
+	ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node);
+	kfree(node);
+	if (ret > 0)
+		ret = -1;
+	return ret;
+}
+
+static void pnpbios_zero_data_stream(struct pnp_bios_node *node)
+{
+	unsigned char *p = (char *)node->data;
+	unsigned char *end = (char *)(node->data + node->size);
+	unsigned int len;
+	int i;
+
+	while ((char *)p < (char *)end) {
+		if (p[0] & 0x80) {	/* large tag */
+			len = (p[2] << 8) | p[1];
+			p += 3;
+		} else {
+			if (((p[0] >> 3) & 0x0f) == 0x0f)
+				return;
+			len = p[0] & 0x07;
+			p += 1;
+		}
+		for (i = 0; i < len; i++)
+			p[i] = 0;
+		p += len;
+	}
+	printk(KERN_ERR
+	       "PnPBIOS: Resource structure did not contain an end tag.\n");
+}
+
+static int pnpbios_disable_resources(struct pnp_dev *dev)
+{
+	struct pnp_bios_node *node;
+	u8 nodenum = dev->number;
+	int ret;
+
+	if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -ENOMEM;
+
+	if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+		kfree(node);
+		return -ENODEV;
+	}
+	pnpbios_zero_data_stream(node);
+
+	ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node);
+	kfree(node);
+	if (ret > 0)
+		ret = -1;
+	return ret;
+}
+
+/* PnP Layer support */
+
+struct pnp_protocol pnpbios_protocol = {
+	.name = "Plug and Play BIOS",
+	.get = pnpbios_get_resources,
+	.set = pnpbios_set_resources,
+	.disable = pnpbios_disable_resources,
+};
+
+static int __init insert_device(struct pnp_bios_node *node)
+{
+	struct list_head *pos;
+	struct pnp_dev *dev;
+	char id[8];
+	int error;
+
+	/* check if the device is already added */
+	list_for_each(pos, &pnpbios_protocol.devices) {
+		dev = list_entry(pos, struct pnp_dev, protocol_list);
+		if (dev->number == node->handle)
+			return -EEXIST;
+	}
+
+	pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id);
+	dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id);
+	if (!dev)
+		return -ENOMEM;
+
+	pnpbios_parse_data_stream(dev, node);
+	dev->active = pnp_is_active(dev);
+	dev->flags = node->flags;
+	if (!(dev->flags & PNPBIOS_NO_CONFIG))
+		dev->capabilities |= PNP_CONFIGURABLE;
+	if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev))
+		dev->capabilities |= PNP_DISABLE;
+	dev->capabilities |= PNP_READ;
+	if (pnpbios_is_dynamic(dev))
+		dev->capabilities |= PNP_WRITE;
+	if (dev->flags & PNPBIOS_REMOVABLE)
+		dev->capabilities |= PNP_REMOVABLE;
+
+	/* clear out the damaged flags */
+	if (!dev->active)
+		pnp_init_resources(dev);
+
+	error = pnp_add_device(dev);
+	if (error) {
+		put_device(&dev->dev);
+		return error;
+	}
+
+	pnpbios_interface_attach_device(node);
+
+	return 0;
+}
+
+static void __init build_devlist(void)
+{
+	u8 nodenum;
+	unsigned int nodes_got = 0;
+	unsigned int devs = 0;
+	struct pnp_bios_node *node;
+
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return;
+
+	for (nodenum = 0; nodenum < 0xff;) {
+		u8 thisnodenum = nodenum;
+		/* eventually we will want to use PNPMODE_STATIC here but for now
+		 * dynamic will help us catch buggy bioses to add to the blacklist.
+		 */
+		if (!pnpbios_dont_use_current_config) {
+			if (pnp_bios_get_dev_node
+			    (&nodenum, (char)PNPMODE_DYNAMIC, node))
+				break;
+		} else {
+			if (pnp_bios_get_dev_node
+			    (&nodenum, (char)PNPMODE_STATIC, node))
+				break;
+		}
+		nodes_got++;
+		if (insert_device(node) == 0)
+			devs++;
+		if (nodenum <= thisnodenum) {
+			printk(KERN_ERR
+			       "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+			       (unsigned int)nodenum,
+			       (unsigned int)thisnodenum);
+			break;
+		}
+	}
+	kfree(node);
+
+	printk(KERN_INFO
+	       "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n",
+	       nodes_got, nodes_got != 1 ? "s" : "", devs);
+}
+
+/*
+ *
+ * INIT AND EXIT
+ *
+ */
+
+static int pnpbios_disabled;
+int pnpbios_dont_use_current_config;
+
+static int __init pnpbios_setup(char *str)
+{
+	int invert;
+
+	while ((str != NULL) && (*str != '\0')) {
+		if (strncmp(str, "off", 3) == 0)
+			pnpbios_disabled = 1;
+		if (strncmp(str, "on", 2) == 0)
+			pnpbios_disabled = 0;
+		invert = (strncmp(str, "no-", 3) == 0);
+		if (invert)
+			str += 3;
+		if (strncmp(str, "curr", 4) == 0)
+			pnpbios_dont_use_current_config = invert;
+		str = strchr(str, ',');
+		if (str != NULL)
+			str += strspn(str, ", \t");
+	}
+
+	return 1;
+}
+
+__setup("pnpbios=", pnpbios_setup);
+
+/* PnP BIOS signature: "$PnP" */
+#define PNP_SIGNATURE   (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24))
+
+static int __init pnpbios_probe_system(void)
+{
+	union pnp_bios_install_struct *check;
+	u8 sum;
+	int length, i;
+
+	printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n");
+
+	/*
+	 * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
+	 * structure and, if one is found, sets up the selectors and
+	 * entry points
+	 */
+	for (check = (union pnp_bios_install_struct *)__va(0xf0000);
+	     check < (union pnp_bios_install_struct *)__va(0xffff0);
+	     check = (void *)check + 16) {
+		if (check->fields.signature != PNP_SIGNATURE)
+			continue;
+		printk(KERN_INFO
+		       "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n",
+		       check);
+		length = check->fields.length;
+		if (!length) {
+			printk(KERN_ERR
+			       "PnPBIOS: installation structure is invalid, skipping\n");
+			continue;
+		}
+		for (sum = 0, i = 0; i < length; i++)
+			sum += check->chars[i];
+		if (sum) {
+			printk(KERN_ERR
+			       "PnPBIOS: installation structure is corrupted, skipping\n");
+			continue;
+		}
+		if (check->fields.version < 0x10) {
+			printk(KERN_WARNING
+			       "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
+			       check->fields.version >> 4,
+			       check->fields.version & 15);
+			continue;
+		}
+		printk(KERN_INFO
+		       "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
+		       check->fields.version >> 4, check->fields.version & 15,
+		       check->fields.pm16cseg, check->fields.pm16offset,
+		       check->fields.pm16dseg);
+		pnp_bios_install = check;
+		return 1;
+	}
+
+	printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n");
+	return 0;
+}
+
+static int __init exploding_pnp_bios(const struct dmi_system_id *d)
+{
+	printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident);
+	return 0;
+}
+
+static const struct dmi_system_id pnpbios_dmi_table[] __initconst = {
+	{			/* PnPBIOS GPF on boot */
+	 .callback = exploding_pnp_bios,
+	 .ident = "Higraded P14H",
+	 .matches = {
+		     DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
+		     DMI_MATCH(DMI_BIOS_VERSION, "07.00T"),
+		     DMI_MATCH(DMI_SYS_VENDOR, "Higraded"),
+		     DMI_MATCH(DMI_PRODUCT_NAME, "P14H"),
+		     },
+	 },
+	{			/* PnPBIOS GPF on boot */
+	 .callback = exploding_pnp_bios,
+	 .ident = "ASUS P4P800",
+	 .matches = {
+		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."),
+		     DMI_MATCH(DMI_BOARD_NAME, "P4P800"),
+		     },
+	 },
+	{}
+};
+
+static int __init pnpbios_init(void)
+{
+	int ret;
+
+	if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) ||
+	    arch_pnpbios_disabled()) {
+		printk(KERN_INFO "PnPBIOS: Disabled\n");
+		return -ENODEV;
+	}
+
+#ifdef CONFIG_PNPACPI
+	if (!acpi_disabled && !pnpacpi_disabled) {
+		pnpbios_disabled = 1;
+		printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n");
+		return -ENODEV;
+	}
+#endif				/* CONFIG_ACPI */
+
+	/* scan the system for pnpbios support */
+	if (!pnpbios_probe_system())
+		return -ENODEV;
+
+	/* make preparations for bios calls */
+	pnpbios_calls_init(pnp_bios_install);
+
+	/* read the node info */
+	ret = pnp_bios_dev_node_info(&node_info);
+	if (ret) {
+		printk(KERN_ERR
+		       "PnPBIOS: Unable to get node info.  Aborting.\n");
+		return ret;
+	}
+
+	/* register with the pnp layer */
+	ret = pnp_register_protocol(&pnpbios_protocol);
+	if (ret) {
+		printk(KERN_ERR
+		       "PnPBIOS: Unable to register driver.  Aborting.\n");
+		return ret;
+	}
+
+	/* start the proc interface */
+	ret = pnpbios_proc_init();
+	if (ret)
+		printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n");
+
+	/* scan for pnpbios devices */
+	build_devlist();
+
+	pnp_platform_devices = 1;
+	return 0;
+}
+
+fs_initcall(pnpbios_init);
+
+static int __init pnpbios_thread_init(void)
+{
+	struct task_struct *task;
+
+	if (pnpbios_disabled)
+		return 0;
+
+	init_completion(&unload_sem);
+	task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd");
+	return PTR_ERR_OR_ZERO(task);
+}
+
+/* Start the kernel thread later: */
+device_initcall(pnpbios_thread_init);
+
+EXPORT_SYMBOL(pnpbios_protocol);
diff --git a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h
new file mode 100644
index 000000000..2ce739ff9
--- /dev/null
+++ b/drivers/pnp/pnpbios/pnpbios.h
@@ -0,0 +1,169 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * pnpbios.h - contains local definitions
+ */
+
+/*
+ * Include file for the interface to a PnP BIOS
+ *
+ * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de)
+ * PnP handler parts (c) 1998 Tom Lees <tom@lpsg.demon.co.uk>
+ * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net>
+ */
+
+/*
+ * Return codes
+ */
+#define PNP_SUCCESS                     0x00
+#define PNP_NOT_SET_STATICALLY          0x7f
+#define PNP_UNKNOWN_FUNCTION            0x81
+#define PNP_FUNCTION_NOT_SUPPORTED      0x82
+#define PNP_INVALID_HANDLE              0x83
+#define PNP_BAD_PARAMETER               0x84
+#define PNP_SET_FAILED                  0x85
+#define PNP_EVENTS_NOT_PENDING          0x86
+#define PNP_SYSTEM_NOT_DOCKED           0x87
+#define PNP_NO_ISA_PNP_CARDS            0x88
+#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
+#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a
+#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
+#define PNP_BUFFER_TOO_SMALL            0x8c
+#define PNP_USE_ESCD_SUPPORT            0x8d
+#define PNP_MESSAGE_NOT_SUPPORTED       0x8e
+#define PNP_HARDWARE_ERROR              0x8f
+
+#define ESCD_SUCCESS                    0x00
+#define ESCD_IO_ERROR_READING           0x55
+#define ESCD_INVALID                    0x56
+#define ESCD_BUFFER_TOO_SMALL           0x59
+#define ESCD_NVRAM_TOO_SMALL            0x5a
+#define ESCD_FUNCTION_NOT_SUPPORTED     0x81
+
+/*
+ * Events that can be received by "get event"
+ */
+#define PNPEV_ABOUT_TO_CHANGE_CONFIG	0x0001
+#define PNPEV_DOCK_CHANGED		0x0002
+#define PNPEV_SYSTEM_DEVICE_CHANGED	0x0003
+#define PNPEV_CONFIG_CHANGED_FAILED	0x0004
+#define PNPEV_UNKNOWN_SYSTEM_EVENT	0xffff
+/* 0x8000 through 0xfffe are OEM defined */
+
+/*
+ * Messages that should be sent through "send message"
+ */
+#define PNPMSG_OK			0x00
+#define PNPMSG_ABORT			0x01
+#define PNPMSG_UNDOCK_DEFAULT_ACTION	0x40
+#define PNPMSG_POWER_OFF		0x41
+#define PNPMSG_PNP_OS_ACTIVE		0x42
+#define PNPMSG_PNP_OS_INACTIVE		0x43
+
+/*
+ * Plug and Play BIOS flags
+ */
+#define PNPBIOS_NO_DISABLE		0x0001
+#define PNPBIOS_NO_CONFIG		0x0002
+#define PNPBIOS_OUTPUT			0x0004
+#define PNPBIOS_INPUT			0x0008
+#define PNPBIOS_BOOTABLE		0x0010
+#define PNPBIOS_DOCK			0x0020
+#define PNPBIOS_REMOVABLE		0x0040
+#define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000)
+#define pnpbios_is_dynamic(x) ((x)->flags & 0x0080)
+
+/*
+ * Function Parameters
+ */
+#define PNPMODE_STATIC 1
+#define PNPMODE_DYNAMIC 0
+
+/* 0x8000 through 0xffff are OEM defined */
+
+#pragma pack(1)
+struct pnp_dev_node_info {
+	__u16 no_nodes;
+	__u16 max_node_size;
+};
+struct pnp_docking_station_info {
+	__u32 location_id;
+	__u32 serial;
+	__u16 capabilities;
+};
+struct pnp_isa_config_struc {
+	__u8 revision;
+	__u8 no_csns;
+	__u16 isa_rd_data_port;
+	__u16 reserved;
+};
+struct escd_info_struc {
+	__u16 min_escd_write_size;
+	__u16 escd_size;
+	__u32 nv_storage_base;
+};
+struct pnp_bios_node {
+	__u16 size;
+	__u8 handle;
+	__u32 eisa_id;
+	__u8 type_code[3];
+	__u16 flags;
+	__u8 data[];
+};
+#pragma pack()
+
+/* non-exported */
+extern struct pnp_dev_node_info node_info;
+
+extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data);
+extern int pnp_bios_get_dev_node(u8 *nodenum, char config,
+				 struct pnp_bios_node *data);
+extern int pnp_bios_set_dev_node(u8 nodenum, char config,
+				 struct pnp_bios_node *data);
+extern int pnp_bios_get_stat_res(char *info);
+extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data);
+extern int pnp_bios_escd_info(struct escd_info_struc *data);
+extern int pnp_bios_read_escd(char *data, u32 nvram_base);
+extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data);
+
+#pragma pack(1)
+union pnp_bios_install_struct {
+	struct {
+		u32 signature;    /* "$PnP" */
+		u8 version;	  /* in BCD */
+		u8 length;	  /* length in bytes, currently 21h */
+		u16 control;	  /* system capabilities */
+		u8 checksum;	  /* all bytes must add up to 0 */
+
+		u32 eventflag;    /* phys. address of the event flag */
+		u16 rmoffset;     /* real mode entry point */
+		u16 rmcseg;
+		u16 pm16offset;   /* 16 bit protected mode entry */
+		u32 pm16cseg;
+		u32 deviceID;	  /* EISA encoded system ID or 0 */
+		u16 rmdseg;	  /* real mode data segment */
+		u32 pm16dseg;	  /* 16 bit pm data segment base */
+	} fields;
+	char chars[0x21];	  /* To calculate the checksum */
+};
+#pragma pack()
+
+extern int pnp_bios_present(void);
+extern int  pnpbios_dont_use_current_config;
+
+extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node);
+extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node);
+extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node);
+extern void pnpid32_to_pnpid(u32 id, char *str);
+
+extern void pnpbios_print_status(const char * module, u16 status);
+extern void pnpbios_calls_init(union pnp_bios_install_struct * header);
+
+#ifdef CONFIG_PNPBIOS_PROC_FS
+extern int pnpbios_interface_attach_device(struct pnp_bios_node * node);
+extern int pnpbios_proc_init (void);
+extern void pnpbios_proc_exit (void);
+#else
+static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; }
+static inline int pnpbios_proc_init (void) { return 0; }
+static inline void pnpbios_proc_exit (void) { ; }
+#endif /* CONFIG_PNPBIOS_PROC_FS */
diff --git a/drivers/pnp/pnpbios/proc.c b/drivers/pnp/pnpbios/proc.c
new file mode 100644
index 000000000..a806830e3
--- /dev/null
+++ b/drivers/pnp/pnpbios/proc.c
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * /proc/bus/pnp interface for Plug and Play devices
+ *
+ * Written by David Hinds, dahinds@users.sourceforge.net
+ * Modified by Thomas Hood
+ *
+ * The .../devices and .../<node> and .../boot/<node> files are
+ * utilized by the lspnp and setpnp utilities, supplied with the
+ * pcmcia-cs package.
+ *     http://pcmcia-cs.sourceforge.net
+ *
+ * The .../escd file is utilized by the lsescd utility written by
+ * Gunther Mayer.
+ *
+ * The .../legacy_device_resources file is not used yet.
+ *
+ * The other files are human-readable.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/pnp.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+
+#include <linux/uaccess.h>
+
+#include "pnpbios.h"
+
+static struct proc_dir_entry *proc_pnp = NULL;
+static struct proc_dir_entry *proc_pnp_boot = NULL;
+
+static int pnpconfig_proc_show(struct seq_file *m, void *v)
+{
+	struct pnp_isa_config_struc pnps;
+
+	if (pnp_bios_isapnp_config(&pnps))
+		return -EIO;
+	seq_printf(m, "structure_revision %d\n"
+		      "number_of_CSNs %d\n"
+		      "ISA_read_data_port 0x%x\n",
+		   pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
+	return 0;
+}
+
+static int escd_info_proc_show(struct seq_file *m, void *v)
+{
+	struct escd_info_struc escd;
+
+	if (pnp_bios_escd_info(&escd))
+		return -EIO;
+	seq_printf(m, "min_ESCD_write_size %d\n"
+			"ESCD_size %d\n"
+			"NVRAM_base 0x%x\n",
+			escd.min_escd_write_size,
+			escd.escd_size, escd.nv_storage_base);
+	return 0;
+}
+
+#define MAX_SANE_ESCD_SIZE (32*1024)
+static int escd_proc_show(struct seq_file *m, void *v)
+{
+	struct escd_info_struc escd;
+	char *tmpbuf;
+	int escd_size;
+
+	if (pnp_bios_escd_info(&escd))
+		return -EIO;
+
+	/* sanity check */
+	if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
+		printk(KERN_ERR
+		       "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
+		return -EFBIG;
+	}
+
+	tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
+	if (!tmpbuf)
+		return -ENOMEM;
+
+	if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
+		kfree(tmpbuf);
+		return -EIO;
+	}
+
+	escd_size =
+	    (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
+
+	/* sanity check */
+	if (escd_size > MAX_SANE_ESCD_SIZE) {
+		printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by"
+				" BIOS read_escd call is too great\n", __func__);
+		kfree(tmpbuf);
+		return -EFBIG;
+	}
+
+	seq_write(m, tmpbuf, escd_size);
+	kfree(tmpbuf);
+	return 0;
+}
+
+static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
+{
+	void *buf;
+
+	buf = kmalloc(65536, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	if (pnp_bios_get_stat_res(buf)) {
+		kfree(buf);
+		return -EIO;
+	}
+
+	seq_write(m, buf, 65536);
+	kfree(buf);
+	return 0;
+}
+
+static int pnp_devices_proc_show(struct seq_file *m, void *v)
+{
+	struct pnp_bios_node *node;
+	u8 nodenum;
+
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -ENOMEM;
+
+	for (nodenum = 0; nodenum < 0xff;) {
+		u8 thisnodenum = nodenum;
+
+		if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
+			break;
+		seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n",
+			     node->handle, node->eisa_id,
+			     node->type_code, node->flags);
+		if (nodenum <= thisnodenum) {
+			printk(KERN_ERR
+			       "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+			       "PnPBIOS: proc_read_devices:",
+			       (unsigned int)nodenum,
+			       (unsigned int)thisnodenum);
+			break;
+		}
+	}
+	kfree(node);
+	return 0;
+}
+
+static int pnpbios_proc_show(struct seq_file *m, void *v)
+{
+	void *data = m->private;
+	struct pnp_bios_node *node;
+	int boot = (long)data >> 8;
+	u8 nodenum = (long)data;
+	int len;
+
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -ENOMEM;
+	if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+		kfree(node);
+		return -EIO;
+	}
+	len = node->size - sizeof(struct pnp_bios_node);
+	seq_write(m, node->data, len);
+	kfree(node);
+	return 0;
+}
+
+static int pnpbios_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, pnpbios_proc_show, PDE_DATA(inode));
+}
+
+static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
+				  size_t count, loff_t *pos)
+{
+	void *data = PDE_DATA(file_inode(file));
+	struct pnp_bios_node *node;
+	int boot = (long)data >> 8;
+	u8 nodenum = (long)data;
+	int ret = count;
+
+	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node)
+		return -ENOMEM;
+	if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+		ret = -EIO;
+		goto out;
+	}
+	if (count != node->size - sizeof(struct pnp_bios_node)) {
+		ret = -EINVAL;
+		goto out;
+	}
+	if (copy_from_user(node->data, buf, count)) {
+		ret = -EFAULT;
+		goto out;
+	}
+	if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
+		ret = -EINVAL;
+		goto out;
+	}
+	ret = count;
+out:
+	kfree(node);
+	return ret;
+}
+
+static const struct proc_ops pnpbios_proc_ops = {
+	.proc_open	= pnpbios_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= pnpbios_proc_write,
+};
+
+int pnpbios_interface_attach_device(struct pnp_bios_node *node)
+{
+	char name[3];
+
+	sprintf(name, "%02x", node->handle);
+
+	if (!proc_pnp)
+		return -EIO;
+	if (!pnpbios_dont_use_current_config) {
+		proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_ops,
+				 (void *)(long)(node->handle));
+	}
+
+	if (!proc_pnp_boot)
+		return -EIO;
+	if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_ops,
+			     (void *)(long)(node->handle + 0x100)))
+		return 0;
+	return -EIO;
+}
+
+/*
+ * When this is called, pnpbios functions are assumed to
+ * work and the pnpbios_dont_use_current_config flag
+ * should already have been set to the appropriate value
+ */
+int __init pnpbios_proc_init(void)
+{
+	proc_pnp = proc_mkdir("bus/pnp", NULL);
+	if (!proc_pnp)
+		return -EIO;
+	proc_pnp_boot = proc_mkdir("boot", proc_pnp);
+	if (!proc_pnp_boot)
+		return -EIO;
+	proc_create_single("devices", 0, proc_pnp, pnp_devices_proc_show);
+	proc_create_single("configuration_info", 0, proc_pnp,
+			pnpconfig_proc_show);
+	proc_create_single("escd_info", 0, proc_pnp, escd_info_proc_show);
+	proc_create_single("escd", S_IRUSR, proc_pnp, escd_proc_show);
+	proc_create_single("legacy_device_resources", 0, proc_pnp,
+			pnp_legacyres_proc_show);
+	return 0;
+}
+
+void __exit pnpbios_proc_exit(void)
+{
+	int i;
+	char name[3];
+
+	if (!proc_pnp)
+		return;
+
+	for (i = 0; i < 0xff; i++) {
+		sprintf(name, "%02x", i);
+		if (!pnpbios_dont_use_current_config)
+			remove_proc_entry(name, proc_pnp);
+		remove_proc_entry(name, proc_pnp_boot);
+	}
+	remove_proc_entry("legacy_device_resources", proc_pnp);
+	remove_proc_entry("escd", proc_pnp);
+	remove_proc_entry("escd_info", proc_pnp);
+	remove_proc_entry("configuration_info", proc_pnp);
+	remove_proc_entry("devices", proc_pnp);
+	remove_proc_entry("boot", proc_pnp);
+	remove_proc_entry("bus/pnp", NULL);
+}
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
new file mode 100644
index 000000000..2f31b212b
--- /dev/null
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -0,0 +1,810 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rsparser.c - parses and encodes pnpbios resource data streams
+ */
+
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include <linux/string.h>
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#else
+inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+}
+#endif				/* CONFIG_PCI */
+
+#include "../base.h"
+#include "pnpbios.h"
+
+/* standard resource tags */
+#define SMALL_TAG_PNPVERNO		0x01
+#define SMALL_TAG_LOGDEVID		0x02
+#define SMALL_TAG_COMPATDEVID		0x03
+#define SMALL_TAG_IRQ			0x04
+#define SMALL_TAG_DMA			0x05
+#define SMALL_TAG_STARTDEP		0x06
+#define SMALL_TAG_ENDDEP		0x07
+#define SMALL_TAG_PORT			0x08
+#define SMALL_TAG_FIXEDPORT		0x09
+#define SMALL_TAG_VENDOR		0x0e
+#define SMALL_TAG_END			0x0f
+#define LARGE_TAG			0x80
+#define LARGE_TAG_MEM			0x81
+#define LARGE_TAG_ANSISTR		0x82
+#define LARGE_TAG_UNICODESTR		0x83
+#define LARGE_TAG_VENDOR		0x84
+#define LARGE_TAG_MEM32			0x85
+#define LARGE_TAG_FIXEDMEM32		0x86
+
+/*
+ * Resource Data Stream Format:
+ *
+ * Allocated Resources (required)
+ * end tag ->
+ * Resource Configuration Options (optional)
+ * end tag ->
+ * Compitable Device IDs (optional)
+ * final end tag ->
+ */
+
+/*
+ * Allocated Resources
+ */
+
+static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
+					       int start, int len)
+{
+	int flags = 0;
+	int end = start + len - 1;
+
+	if (len <= 0 || end >= 0x10003)
+		flags |= IORESOURCE_DISABLED;
+
+	pnp_add_io_resource(dev, start, end, flags);
+}
+
+static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
+						int start, int len)
+{
+	int flags = 0;
+	int end = start + len - 1;
+
+	if (len <= 0)
+		flags |= IORESOURCE_DISABLED;
+
+	pnp_add_mem_resource(dev, start, end, flags);
+}
+
+static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
+							    unsigned char *p,
+							    unsigned char *end)
+{
+	unsigned int len, tag;
+	int io, size, mask, i, flags;
+
+	if (!p)
+		return NULL;
+
+	pnp_dbg(&dev->dev, "parse allocated resources\n");
+
+	pnp_init_resources(dev);
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) {	/* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else {	/* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0] >> 3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			io = *(short *)&p[4];
+			size = *(short *)&p[10];
+			pnpbios_parse_allocated_memresource(dev, io, size);
+			break;
+
+		case LARGE_TAG_ANSISTR:
+			/* ignore this for now */
+			break;
+
+		case LARGE_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			io = *(int *)&p[4];
+			size = *(int *)&p[16];
+			pnpbios_parse_allocated_memresource(dev, io, size);
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			io = *(int *)&p[4];
+			size = *(int *)&p[8];
+			pnpbios_parse_allocated_memresource(dev, io, size);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			flags = 0;
+			io = -1;
+			mask = p[1] + p[2] * 256;
+			for (i = 0; i < 16; i++, mask = mask >> 1)
+				if (mask & 0x01)
+					io = i;
+			if (io != -1)
+				pcibios_penalize_isa_irq(io, 1);
+			else
+				flags = IORESOURCE_DISABLED;
+			pnp_add_irq_resource(dev, io, flags);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			flags = 0;
+			io = -1;
+			mask = p[1];
+			for (i = 0; i < 8; i++, mask = mask >> 1)
+				if (mask & 0x01)
+					io = i;
+			if (io == -1)
+				flags = IORESOURCE_DISABLED;
+			pnp_add_dma_resource(dev, io, flags);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			io = p[2] + p[3] * 256;
+			size = p[7];
+			pnpbios_parse_allocated_ioresource(dev, io, size);
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			io = p[1] + p[2] * 256;
+			size = p[3];
+			pnpbios_parse_allocated_ioresource(dev, io, size);
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+			return (unsigned char *)p;
+			break;
+
+		default:	/* an unknown tag */
+len_err:
+			dev_err(&dev->dev, "unknown tag %#x length %d\n",
+				tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	dev_err(&dev->dev, "no end tag in resource structure\n");
+
+	return NULL;
+}
+
+/*
+ * Resource Configuration Options
+ */
+
+static __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
+					    unsigned char *p, int size,
+					    unsigned int option_flags)
+{
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	min = ((p[5] << 8) | p[4]) << 8;
+	max = ((p[7] << 8) | p[6]) << 8;
+	align = (p[9] << 8) | p[8];
+	len = ((p[11] << 8) | p[10]) << 8;
+	flags = p[3];
+	pnp_register_mem_resource(dev, option_flags, min, max, align, len,
+				  flags);
+}
+
+static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
+					      unsigned char *p, int size,
+					      unsigned int option_flags)
+{
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
+	len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
+	flags = p[3];
+	pnp_register_mem_resource(dev, option_flags, min, max, align, len,
+				  flags);
+}
+
+static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
+						    unsigned char *p, int size,
+						    unsigned int option_flags)
+{
+	resource_size_t base, len;
+	unsigned char flags;
+
+	base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	flags = p[3];
+	pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
+}
+
+static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
+					    unsigned char *p, int size,
+					    unsigned int option_flags)
+{
+	unsigned long bits;
+	pnp_irq_mask_t map;
+	unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
+
+	bits = (p[2] << 8) | p[1];
+
+	bitmap_zero(map.bits, PNP_IRQ_NR);
+	bitmap_copy(map.bits, &bits, 16);
+
+	if (size > 2)
+		flags = p[3];
+
+	pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
+					    unsigned char *p, int size,
+					    unsigned int option_flags)
+{
+	pnp_register_dma_resource(dev, option_flags, p[1], p[2]);
+}
+
+static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
+					     unsigned char *p, int size,
+					     unsigned int option_flags)
+{
+	resource_size_t min, max, align, len;
+	unsigned char flags;
+
+	min = (p[3] << 8) | p[2];
+	max = (p[5] << 8) | p[4];
+	align = p[6];
+	len = p[7];
+	flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0;
+	pnp_register_port_resource(dev, option_flags, min, max, align, len,
+				   flags);
+}
+
+static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
+						   unsigned char *p, int size,
+						   unsigned int option_flags)
+{
+	resource_size_t base, len;
+
+	base = (p[2] << 8) | p[1];
+	len = p[3];
+	pnp_register_port_resource(dev, option_flags, base, base, 0, len,
+				   IORESOURCE_IO_FIXED);
+}
+
+static __init unsigned char *
+pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
+				   struct pnp_dev *dev)
+{
+	unsigned int len, tag;
+	int priority;
+	unsigned int option_flags;
+
+	if (!p)
+		return NULL;
+
+	pnp_dbg(&dev->dev, "parse resource options\n");
+	option_flags = 0;
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) {	/* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else {	/* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0] >> 3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			pnpbios_parse_mem_option(dev, p, len, option_flags);
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_parse_mem32_option(dev, p, len, option_flags);
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_parse_fixed_mem32_option(dev, p, len,
+							 option_flags);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_parse_irq_option(dev, p, len, option_flags);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_parse_dma_option(dev, p, len, option_flags);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_parse_port_option(dev, p, len, option_flags);
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_parse_fixed_port_option(dev, p, len,
+							option_flags);
+			break;
+
+		case SMALL_TAG_STARTDEP:
+			if (len > 1)
+				goto len_err;
+			priority = PNP_RES_PRIORITY_ACCEPTABLE;
+			if (len > 0)
+				priority = p[1];
+			option_flags = pnp_new_dependent_set(dev, priority);
+			break;
+
+		case SMALL_TAG_ENDDEP:
+			if (len != 0)
+				goto len_err;
+			option_flags = 0;
+			break;
+
+		case SMALL_TAG_END:
+			return p + 2;
+
+		default:	/* an unknown tag */
+len_err:
+			dev_err(&dev->dev, "unknown tag %#x length %d\n",
+				tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	dev_err(&dev->dev, "no end tag in resource structure\n");
+
+	return NULL;
+}
+
+/*
+ * Compatible Device IDs
+ */
+
+static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
+						   unsigned char *end,
+						   struct pnp_dev *dev)
+{
+	int len, tag;
+	u32 eisa_id;
+	char id[8];
+	struct pnp_id *dev_id;
+
+	if (!p)
+		return NULL;
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) {	/* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else {	/* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0] >> 3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_ANSISTR:
+			strncpy(dev->name, p + 3,
+				len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
+			dev->name[len >=
+				  PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
+			break;
+
+		case SMALL_TAG_COMPATDEVID:	/* compatible ID */
+			if (len != 4)
+				goto len_err;
+			eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
+			pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
+			dev_id = pnp_add_id(dev, id);
+			if (!dev_id)
+				return NULL;
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+			return (unsigned char *)p;
+			break;
+
+		default:	/* an unknown tag */
+len_err:
+			dev_err(&dev->dev, "unknown tag %#x length %d\n",
+				tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	dev_err(&dev->dev, "no end tag in resource structure\n");
+
+	return NULL;
+}
+
+/*
+ * Allocated Resource Encoding
+ */
+
+static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
+			       struct resource *res)
+{
+	unsigned long base;
+	unsigned long len;
+
+	if (pnp_resource_enabled(res)) {
+		base = res->start;
+		len = resource_size(res);
+	} else {
+		base = 0;
+		len = 0;
+	}
+
+	p[4] = (base >> 8) & 0xff;
+	p[5] = ((base >> 8) >> 8) & 0xff;
+	p[6] = (base >> 8) & 0xff;
+	p[7] = ((base >> 8) >> 8) & 0xff;
+	p[10] = (len >> 8) & 0xff;
+	p[11] = ((len >> 8) >> 8) & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode mem %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
+				 struct resource *res)
+{
+	unsigned long base;
+	unsigned long len;
+
+	if (pnp_resource_enabled(res)) {
+		base = res->start;
+		len = resource_size(res);
+	} else {
+		base = 0;
+		len = 0;
+	}
+
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[6] = (base >> 16) & 0xff;
+	p[7] = (base >> 24) & 0xff;
+	p[8] = base & 0xff;
+	p[9] = (base >> 8) & 0xff;
+	p[10] = (base >> 16) & 0xff;
+	p[11] = (base >> 24) & 0xff;
+	p[16] = len & 0xff;
+	p[17] = (len >> 8) & 0xff;
+	p[18] = (len >> 16) & 0xff;
+	p[19] = (len >> 24) & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode mem32 %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
+				       struct resource *res)
+{
+	unsigned long base;
+	unsigned long len;
+
+	if (pnp_resource_enabled(res)) {
+		base = res->start;
+		len = resource_size(res);
+	} else {
+		base = 0;
+		len = 0;
+	}
+
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[6] = (base >> 16) & 0xff;
+	p[7] = (base >> 24) & 0xff;
+	p[8] = len & 0xff;
+	p[9] = (len >> 8) & 0xff;
+	p[10] = (len >> 16) & 0xff;
+	p[11] = (len >> 24) & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode fixed_mem32 %#lx-%#lx\n", base,
+		base + len - 1);
+}
+
+static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
+			       struct resource *res)
+{
+	unsigned long map;
+
+	if (pnp_resource_enabled(res))
+		map = 1 << res->start;
+	else
+		map = 0;
+
+	p[1] = map & 0xff;
+	p[2] = (map >> 8) & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode irq mask %#lx\n", map);
+}
+
+static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
+			       struct resource *res)
+{
+	unsigned long map;
+
+	if (pnp_resource_enabled(res))
+		map = 1 << res->start;
+	else
+		map = 0;
+
+	p[1] = map & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode dma mask %#lx\n", map);
+}
+
+static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
+				struct resource *res)
+{
+	unsigned long base;
+	unsigned long len;
+
+	if (pnp_resource_enabled(res)) {
+		base = res->start;
+		len = resource_size(res);
+	} else {
+		base = 0;
+		len = 0;
+	}
+
+	p[2] = base & 0xff;
+	p[3] = (base >> 8) & 0xff;
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[7] = len & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode io %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
+				      struct resource *res)
+{
+	unsigned long base = res->start;
+	unsigned long len = resource_size(res);
+
+	if (pnp_resource_enabled(res)) {
+		base = res->start;
+		len = resource_size(res);
+	} else {
+		base = 0;
+		len = 0;
+	}
+
+	p[1] = base & 0xff;
+	p[2] = (base >> 8) & 0xff;
+	p[3] = len & 0xff;
+
+	pnp_dbg(&dev->dev, "  encode fixed_io %#lx-%#lx\n", base,
+		base + len - 1);
+}
+
+static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
+								*dev,
+							     unsigned char *p,
+							     unsigned char *end)
+{
+	unsigned int len, tag;
+	int port = 0, irq = 0, dma = 0, mem = 0;
+
+	if (!p)
+		return NULL;
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) {	/* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else {	/* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0] >> 3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			pnpbios_encode_mem(dev, p,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_encode_mem32(dev, p,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_encode_fixed_mem32(dev, p,
+				pnp_get_resource(dev, IORESOURCE_MEM, mem));
+			mem++;
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_encode_irq(dev, p,
+				pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+			irq++;
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_encode_dma(dev, p,
+				pnp_get_resource(dev, IORESOURCE_DMA, dma));
+			dma++;
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_encode_port(dev, p,
+				pnp_get_resource(dev, IORESOURCE_IO, port));
+			port++;
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_encode_fixed_port(dev, p,
+				pnp_get_resource(dev, IORESOURCE_IO, port));
+			port++;
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+			return (unsigned char *)p;
+			break;
+
+		default:	/* an unknown tag */
+len_err:
+			dev_err(&dev->dev, "unknown tag %#x length %d\n",
+				tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	dev_err(&dev->dev, "no end tag in resource structure\n");
+
+	return NULL;
+}
+
+/*
+ * Core Parsing Functions
+ */
+
+int __init pnpbios_parse_data_stream(struct pnp_dev *dev,
+					struct pnp_bios_node *node)
+{
+	unsigned char *p = (char *)node->data;
+	unsigned char *end = (char *)(node->data + node->size);
+
+	p = pnpbios_parse_allocated_resource_data(dev, p, end);
+	if (!p)
+		return -EIO;
+	p = pnpbios_parse_resource_option_data(p, end, dev);
+	if (!p)
+		return -EIO;
+	p = pnpbios_parse_compatible_ids(p, end, dev);
+	if (!p)
+		return -EIO;
+	return 0;
+}
+
+int pnpbios_read_resources_from_node(struct pnp_dev *dev,
+				     struct pnp_bios_node *node)
+{
+	unsigned char *p = (char *)node->data;
+	unsigned char *end = (char *)(node->data + node->size);
+
+	p = pnpbios_parse_allocated_resource_data(dev, p, end);
+	if (!p)
+		return -EIO;
+	return 0;
+}
+
+int pnpbios_write_resources_to_node(struct pnp_dev *dev,
+				    struct pnp_bios_node *node)
+{
+	unsigned char *p = (char *)node->data;
+	unsigned char *end = (char *)(node->data + node->size);
+
+	p = pnpbios_encode_allocated_resource_data(dev, p, end);
+	if (!p)
+		return -EIO;
+	return 0;
+}
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
new file mode 100644
index 000000000..ac98b9919
--- /dev/null
+++ b/drivers/pnp/quirks.c
@@ -0,0 +1,463 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  This file contains quirk handling code for PnP devices
+ *  Some devices do not report all their resources, and need to have extra
+ *  resources added. This is most easily accomplished at initialisation time
+ *  when building up the resource structure for the first time.
+ *
+ *  Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
+ *  Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ *
+ *  Heavily based on PCI quirks handling which is
+ *
+ *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include <linux/io.h>
+#include "base.h"
+
+static void quirk_awe32_add_ports(struct pnp_dev *dev,
+				  struct pnp_option *option,
+				  unsigned int offset)
+{
+	struct pnp_option *new_option;
+
+	new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
+	if (!new_option) {
+		dev_err(&dev->dev, "couldn't add ioport region to option set "
+			"%d\n", pnp_option_set(option));
+		return;
+	}
+
+	*new_option = *option;
+	new_option->u.port.min += offset;
+	new_option->u.port.max += offset;
+	list_add(&new_option->list, &option->list);
+
+	dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
+		(unsigned long long) new_option->u.port.min,
+		(unsigned long long) new_option->u.port.max,
+		pnp_option_set(option));
+}
+
+static void quirk_awe32_resources(struct pnp_dev *dev)
+{
+	struct pnp_option *option;
+	unsigned int set = ~0;
+
+	/*
+	 * Add two extra ioport regions (at offset 0x400 and 0x800 from the
+	 * one given) to every dependent option set.
+	 */
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option) &&
+		    pnp_option_set(option) != set) {
+			set = pnp_option_set(option);
+			quirk_awe32_add_ports(dev, option, 0x800);
+			quirk_awe32_add_ports(dev, option, 0x400);
+		}
+	}
+}
+
+static void quirk_cmi8330_resources(struct pnp_dev *dev)
+{
+	struct pnp_option *option;
+	struct pnp_irq *irq;
+	struct pnp_dma *dma;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (!pnp_option_is_dependent(option))
+			continue;
+
+		if (option->type == IORESOURCE_IRQ) {
+			irq = &option->u.irq;
+			bitmap_zero(irq->map.bits, PNP_IRQ_NR);
+			__set_bit(5, irq->map.bits);
+			__set_bit(7, irq->map.bits);
+			__set_bit(10, irq->map.bits);
+			dev_info(&dev->dev, "set possible IRQs in "
+				 "option set %d to 5, 7, 10\n",
+				 pnp_option_set(option));
+		} else if (option->type == IORESOURCE_DMA) {
+			dma = &option->u.dma;
+			if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
+						IORESOURCE_DMA_8BIT &&
+			    dma->map != 0x0A) {
+				dev_info(&dev->dev, "changing possible "
+					 "DMA channel mask in option set %d "
+					 "from %#02x to 0x0A (1, 3)\n",
+					 pnp_option_set(option), dma->map);
+				dma->map = 0x0A;
+			}
+		}
+	}
+}
+
+static void quirk_sb16audio_resources(struct pnp_dev *dev)
+{
+	struct pnp_option *option;
+	unsigned int prev_option_flags = ~0, n = 0;
+	struct pnp_port *port;
+
+	/*
+	 * The default range on the OPL port for these devices is 0x388-0x388.
+	 * Here we increase that range so that two such cards can be
+	 * auto-configured.
+	 */
+	list_for_each_entry(option, &dev->options, list) {
+		if (prev_option_flags != option->flags) {
+			prev_option_flags = option->flags;
+			n = 0;
+		}
+
+		if (pnp_option_is_dependent(option) &&
+		    option->type == IORESOURCE_IO) {
+			n++;
+			port = &option->u.port;
+			if (n == 3 && port->min == port->max) {
+				port->max += 0x70;
+				dev_info(&dev->dev, "increased option port "
+					 "range from %#llx-%#llx to "
+					 "%#llx-%#llx\n",
+					 (unsigned long long) port->min,
+					 (unsigned long long) port->min,
+					 (unsigned long long) port->min,
+					 (unsigned long long) port->max);
+			}
+		}
+	}
+}
+
+static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
+						  unsigned int set)
+{
+	struct pnp_option *tail = NULL, *first_new_option = NULL;
+	struct pnp_option *option, *new_option;
+	unsigned int flags;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option))
+			tail = option;
+	}
+	if (!tail) {
+		dev_err(&dev->dev, "no dependent option sets\n");
+		return NULL;
+	}
+
+	flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option) &&
+		    pnp_option_set(option) == set) {
+			new_option = kmalloc(sizeof(struct pnp_option),
+					     GFP_KERNEL);
+			if (!new_option) {
+				dev_err(&dev->dev, "couldn't clone dependent "
+					"set %d\n", set);
+				return NULL;
+			}
+
+			*new_option = *option;
+			new_option->flags = flags;
+			if (!first_new_option)
+				first_new_option = new_option;
+
+			list_add(&new_option->list, &tail->list);
+			tail = new_option;
+		}
+	}
+
+	return first_new_option;
+}
+
+
+static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
+{
+	struct pnp_option *new_option;
+	unsigned int num_sets, i, set;
+	struct pnp_irq *irq;
+
+	num_sets = dev->num_dependent_sets;
+	for (i = 0; i < num_sets; i++) {
+		new_option = pnp_clone_dependent_set(dev, i);
+		if (!new_option)
+			return;
+
+		set = pnp_option_set(new_option);
+		while (new_option && pnp_option_set(new_option) == set) {
+			if (new_option->type == IORESOURCE_IRQ) {
+				irq = &new_option->u.irq;
+				irq->flags |= IORESOURCE_IRQ_OPTIONAL;
+			}
+			dbg_pnp_show_option(dev, new_option);
+			new_option = list_entry(new_option->list.next,
+						struct pnp_option, list);
+		}
+
+		dev_info(&dev->dev, "added dependent option set %d (same as "
+			 "set %d except IRQ optional)\n", set, i);
+	}
+}
+
+static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
+{
+	struct pnp_option *option;
+	struct pnp_irq *irq = NULL;
+	unsigned int independent_irqs = 0;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (option->type == IORESOURCE_IRQ &&
+		    !pnp_option_is_dependent(option)) {
+			independent_irqs++;
+			irq = &option->u.irq;
+		}
+	}
+
+	if (independent_irqs != 1)
+		return;
+
+	irq->flags |= IORESOURCE_IRQ_OPTIONAL;
+	dev_info(&dev->dev, "made independent IRQ optional\n");
+}
+
+static void quirk_system_pci_resources(struct pnp_dev *dev)
+{
+	struct pci_dev *pdev = NULL;
+	struct resource *res;
+	resource_size_t pnp_start, pnp_end, pci_start, pci_end;
+	int i, j;
+
+	/*
+	 * Some BIOSes have PNP motherboard devices with resources that
+	 * partially overlap PCI BARs.  The PNP system driver claims these
+	 * motherboard resources, which prevents the normal PCI driver from
+	 * requesting them later.
+	 *
+	 * This patch disables the PNP resources that conflict with PCI BARs
+	 * so they won't be claimed by the PNP system driver.
+	 */
+	for_each_pci_dev(pdev) {
+		for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+			unsigned long flags, type;
+
+			flags = pci_resource_flags(pdev, i);
+			type = flags & (IORESOURCE_IO | IORESOURCE_MEM);
+			if (!type || pci_resource_len(pdev, i) == 0)
+				continue;
+
+			if (flags & IORESOURCE_UNSET)
+				continue;
+
+			pci_start = pci_resource_start(pdev, i);
+			pci_end = pci_resource_end(pdev, i);
+			for (j = 0;
+			     (res = pnp_get_resource(dev, type, j)); j++) {
+				if (res->start == 0 && res->end == 0)
+					continue;
+
+				pnp_start = res->start;
+				pnp_end = res->end;
+
+				/*
+				 * If the PNP region doesn't overlap the PCI
+				 * region at all, there's no problem.
+				 */
+				if (pnp_end < pci_start || pnp_start > pci_end)
+					continue;
+
+				/*
+				 * If the PNP region completely encloses (or is
+				 * at least as large as) the PCI region, that's
+				 * also OK.  For example, this happens when the
+				 * PNP device describes a bridge with PCI
+				 * behind it.
+				 */
+				if (pnp_start <= pci_start &&
+				    pnp_end >= pci_end)
+					continue;
+
+				/*
+				 * Otherwise, the PNP region overlaps *part* of
+				 * the PCI region, and that might prevent a PCI
+				 * driver from requesting its resources.
+				 */
+				dev_warn(&dev->dev,
+					 "disabling %pR because it overlaps "
+					 "%s BAR %d %pR\n", res,
+					 pci_name(pdev), i, &pdev->resource[i]);
+				res->flags |= IORESOURCE_DISABLED;
+			}
+		}
+	}
+}
+
+#ifdef CONFIG_AMD_NB
+
+#include <asm/amd_nb.h>
+
+static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
+{
+	resource_size_t start, end;
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+	struct resource mmconfig_res, *mmconfig;
+
+	mmconfig = amd_get_mmconfig_range(&mmconfig_res);
+	if (!mmconfig)
+		return;
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (res->end < mmconfig->start || res->start > mmconfig->end ||
+		    (res->start == mmconfig->start && res->end == mmconfig->end))
+			continue;
+
+		dev_info(&dev->dev, FW_BUG
+			 "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
+			 res, mmconfig);
+		if (mmconfig->start < res->start) {
+			start = mmconfig->start;
+			end = res->start - 1;
+			pnp_add_mem_resource(dev, start, end, 0);
+		}
+		if (mmconfig->end > res->end) {
+			start = res->end + 1;
+			end = mmconfig->end;
+			pnp_add_mem_resource(dev, start, end, 0);
+		}
+		break;
+	}
+}
+#endif
+
+#ifdef CONFIG_PCI
+/* Device IDs of parts that have 32KB MCH space */
+static const unsigned int mch_quirk_devices[] = {
+	0x0154,	/* Ivy Bridge */
+	0x0a04, /* Haswell-ULT */
+	0x0c00,	/* Haswell */
+	0x1604, /* Broadwell */
+};
+
+static struct pci_dev *get_intel_host(void)
+{
+	int i;
+	struct pci_dev *host;
+
+	for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) {
+		host = pci_get_device(PCI_VENDOR_ID_INTEL, mch_quirk_devices[i],
+				      NULL);
+		if (host)
+			return host;
+	}
+	return NULL;
+}
+
+static void quirk_intel_mch(struct pnp_dev *dev)
+{
+	struct pci_dev *host;
+	u32 addr_lo, addr_hi;
+	struct pci_bus_region region;
+	struct resource mch;
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	host = get_intel_host();
+	if (!host)
+		return;
+
+	/*
+	 * MCHBAR is not an architected PCI BAR, so MCH space is usually
+	 * reported as a PNP0C02 resource.  The MCH space was originally
+	 * 16KB, but is 32KB in newer parts.  Some BIOSes still report a
+	 * PNP0C02 resource that is only 16KB, which means the rest of the
+	 * MCH space is consumed but unreported.
+	 */
+
+	/*
+	 * Read MCHBAR for Host Member Mapped Register Range Base
+	 * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet
+	 * Sec 3.1.12.
+	 */
+	pci_read_config_dword(host, 0x48, &addr_lo);
+	region.start = addr_lo & ~0x7fff;
+	pci_read_config_dword(host, 0x4c, &addr_hi);
+	region.start |= (u64) addr_hi << 32;
+	region.end = region.start + 32*1024 - 1;
+
+	memset(&mch, 0, sizeof(mch));
+	mch.flags = IORESOURCE_MEM;
+	pcibios_bus_to_resource(host->bus, &mch, &region);
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (res->end < mch.start || res->start > mch.end)
+			continue;	/* no overlap */
+		if (res->start == mch.start && res->end == mch.end)
+			continue;	/* exact match */
+
+		dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
+			 res, pci_name(host), &mch);
+		res->start = mch.start;
+		res->end = mch.end;
+		break;
+	}
+
+	pci_dev_put(host);
+}
+#endif
+
+/*
+ *  PnP Quirks
+ *  Cards or devices that need some tweaking due to incomplete resource info
+ */
+
+static struct pnp_fixup pnp_fixups[] = {
+	/* Soundblaster awe io port quirk */
+	{"CTL0021", quirk_awe32_resources},
+	{"CTL0022", quirk_awe32_resources},
+	{"CTL0023", quirk_awe32_resources},
+	/* CMI 8330 interrupt and dma fix */
+	{"@X@0001", quirk_cmi8330_resources},
+	/* Soundblaster audio device io port range quirk */
+	{"CTL0001", quirk_sb16audio_resources},
+	{"CTL0031", quirk_sb16audio_resources},
+	{"CTL0041", quirk_sb16audio_resources},
+	{"CTL0042", quirk_sb16audio_resources},
+	{"CTL0043", quirk_sb16audio_resources},
+	{"CTL0044", quirk_sb16audio_resources},
+	{"CTL0045", quirk_sb16audio_resources},
+	/* Add IRQ-optional MPU options */
+	{"ADS7151", quirk_ad1815_mpu_resources},
+	{"ADS7181", quirk_add_irq_optional_dependent_sets},
+	{"AZT0002", quirk_add_irq_optional_dependent_sets},
+	/* PnP resources that might overlap PCI BARs */
+	{"PNP0c01", quirk_system_pci_resources},
+	{"PNP0c02", quirk_system_pci_resources},
+#ifdef CONFIG_AMD_NB
+	{"PNP0c01", quirk_amd_mmconfig_area},
+#endif
+#ifdef CONFIG_PCI
+	{"PNP0c02", quirk_intel_mch},
+#endif
+	{""}
+};
+
+void pnp_fixup_device(struct pnp_dev *dev)
+{
+	struct pnp_fixup *f;
+
+	for (f = pnp_fixups; *f->id; f++) {
+		if (!compare_pnp_id(dev->id, f->id))
+			continue;
+		pnp_dbg(&dev->dev, "%s: calling %pS\n", f->id,
+			f->quirk_function);
+		f->quirk_function(dev);
+	}
+}
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
new file mode 100644
index 000000000..70d4ba957
--- /dev/null
+++ b/drivers/pnp/resource.c
@@ -0,0 +1,754 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * resource.c - Contains functions for registering and analyzing resource information
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+
+#include <linux/pnp.h>
+#include "base.h"
+
+static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
+static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };	/* reserve (don't use) some DMA */
+static int pnp_reserve_io[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
+static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some memory region */
+
+/*
+ * option registration
+ */
+
+static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
+				    unsigned int option_flags)
+{
+	struct pnp_option *option;
+
+	option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
+	if (!option)
+		return NULL;
+
+	option->flags = option_flags;
+	option->type = type;
+
+	list_add_tail(&option->list, &dev->options);
+	return option;
+}
+
+int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      pnp_irq_mask_t *map, unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_irq *irq;
+
+	option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	irq = &option->u.irq;
+	irq->map = *map;
+	irq->flags = flags;
+
+#ifdef CONFIG_PCI
+	{
+		int i;
+
+		for (i = 0; i < 16; i++)
+			if (test_bit(i, irq->map.bits))
+				pcibios_penalize_isa_irq(i, 0);
+	}
+#endif
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      unsigned char map, unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_dma *dma;
+
+	option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	dma = &option->u.dma;
+	dma->map = map;
+	dma->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
+			       resource_size_t min, resource_size_t max,
+			       resource_size_t align, resource_size_t size,
+			       unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_port *port;
+
+	option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	port = &option->u.port;
+	port->min = min;
+	port->max = max;
+	port->align = align;
+	port->size = size;
+	port->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      resource_size_t min, resource_size_t max,
+			      resource_size_t align, resource_size_t size,
+			      unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_mem *mem;
+
+	option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	mem = &option->u.mem;
+	mem->min = min;
+	mem->max = max;
+	mem->align = align;
+	mem->size = size;
+	mem->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+void pnp_free_options(struct pnp_dev *dev)
+{
+	struct pnp_option *option, *tmp;
+
+	list_for_each_entry_safe(option, tmp, &dev->options, list) {
+		list_del(&option->list);
+		kfree(option);
+	}
+}
+
+/*
+ * resource validity checking
+ */
+
+#define length(start, end) (*(end) - *(start) + 1)
+
+/* Two ranges conflict if one doesn't end before the other starts */
+#define ranged_conflict(starta, enda, startb, endb) \
+	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
+
+#define cannot_compare(flags) \
+((flags) & IORESOURCE_DISABLED)
+
+int pnp_check_port(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *port, *end, *tport, *tend;
+
+	port = &res->start;
+	end = &res->end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (!request_region(*port, length(port, end), "pnp"))
+			return 0;
+		release_region(*port, length(port, end));
+	}
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		int rport = pnp_reserve_io[i << 1];
+		int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
+		if (ranged_conflict(port, end, &rport, &rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_IO) {
+			tport = &tres->start;
+			tend = &tres->end;
+			if (ranged_conflict(port, end, tport, tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_IO) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->flags & IORESOURCE_WINDOW)
+					continue;
+				tport = &tres->start;
+				tend = &tres->end;
+				if (ranged_conflict(port, end, tport, tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *addr, *end, *taddr, *tend;
+
+	addr = &res->start;
+	end = &res->end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (!request_mem_region(*addr, length(addr, end), "pnp"))
+			return 0;
+		release_mem_region(*addr, length(addr, end));
+	}
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		int raddr = pnp_reserve_mem[i << 1];
+		int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
+		if (ranged_conflict(addr, end, &raddr, &rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_MEM) {
+			taddr = &tres->start;
+			tend = &tres->end;
+			if (ranged_conflict(addr, end, taddr, tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_MEM) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->flags & IORESOURCE_WINDOW)
+					continue;
+				taddr = &tres->start;
+				tend = &tres->end;
+				if (ranged_conflict(addr, end, taddr, tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+static irqreturn_t pnp_test_handler(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PCI
+static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
+			    unsigned int irq)
+{
+	u32 class;
+	u8 progif;
+
+	if (pci->irq == irq) {
+		pnp_dbg(&pnp->dev, "  device %s using irq %d\n",
+			pci_name(pci), irq);
+		return 1;
+	}
+
+	/*
+	 * See pci_setup_device() and ata_pci_sff_activate_host() for
+	 * similar IDE legacy detection.
+	 */
+	pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
+	class >>= 8;		/* discard revision ID */
+	progif = class & 0xff;
+	class >>= 8;
+
+	if (class == PCI_CLASS_STORAGE_IDE) {
+		/*
+		 * Unless both channels are native-PCI mode only,
+		 * treat the compatibility IRQs as busy.
+		 */
+		if ((progif & 0x5) != 0x5)
+			if (pci_get_legacy_ide_irq(pci, 0) == irq ||
+			    pci_get_legacy_ide_irq(pci, 1) == irq) {
+				pnp_dbg(&pnp->dev, "  legacy IDE device %s "
+					"using irq %d\n", pci_name(pci), irq);
+				return 1;
+			}
+	}
+
+	return 0;
+}
+#endif
+
+static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
+{
+#ifdef CONFIG_PCI
+	struct pci_dev *pci = NULL;
+
+	for_each_pci_dev(pci) {
+		if (pci_dev_uses_irq(pnp, pci, irq)) {
+			pci_dev_put(pci);
+			return 1;
+		}
+	}
+#endif
+	return 0;
+}
+
+int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *irq;
+
+	irq = &res->start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*irq > 15)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 16; i++) {
+		if (pnp_reserve_irq[i] == *irq)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_IRQ) {
+			if (tres->start == *irq)
+				return 0;
+		}
+	}
+
+	/* check if the resource is being used by a pci device */
+	if (pci_uses_irq(dev, *irq))
+		return 0;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (request_irq(*irq, pnp_test_handler,
+				IRQF_PROBE_SHARED, "pnp", NULL))
+			return 0;
+		free_irq(*irq, NULL);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_IRQ) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->start == *irq)
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+#ifdef CONFIG_ISA_DMA_API
+int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *dma;
+
+	dma = &res->start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*dma == 4 || *dma > 7)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		if (pnp_reserve_dma[i] == *dma)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_DMA) {
+			if (tres->start == *dma)
+				return 0;
+		}
+	}
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (request_dma(*dma, "pnp"))
+			return 0;
+		free_dma(*dma);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_DMA) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->start == *dma)
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+#endif /* CONFIG_ISA_DMA_API */
+
+unsigned long pnp_resource_type(struct resource *res)
+{
+	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
+			     IORESOURCE_IRQ | IORESOURCE_DMA |
+			     IORESOURCE_BUS);
+}
+
+struct resource *pnp_get_resource(struct pnp_dev *dev,
+				  unsigned long type, unsigned int num)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (pnp_resource_type(res) == type && num-- == 0)
+			return res;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL(pnp_get_resource);
+
+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res;
+
+	pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
+	if (!pnp_res)
+		return NULL;
+
+	list_add_tail(&pnp_res->list, &dev->resources);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+				      struct resource *res)
+{
+	struct pnp_resource *pnp_res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource %pR\n", res);
+		return NULL;
+	}
+
+	pnp_res->res = *res;
+	pnp_res->res.name = dev->name;
+	dev_dbg(&dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+					  int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_IRQ | flags;
+	res->start = irq;
+	res->end = irq;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
+					  int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_DMA | flags;
+	res->start = dma;
+	res->end = dma;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+					 resource_size_t start,
+					 resource_size_t end, int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_IO | flags;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end, int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_MEM | flags;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_BUS;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+/*
+ * Determine whether the specified resource is a possible configuration
+ * for this device.
+ */
+int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
+			resource_size_t size)
+{
+	struct pnp_option *option;
+	struct pnp_port *port;
+	struct pnp_mem *mem;
+	struct pnp_irq *irq;
+	struct pnp_dma *dma;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (option->type != type)
+			continue;
+
+		switch (option->type) {
+		case IORESOURCE_IO:
+			port = &option->u.port;
+			if (port->min == start && port->size == size)
+				return 1;
+			break;
+		case IORESOURCE_MEM:
+			mem = &option->u.mem;
+			if (mem->min == start && mem->size == size)
+				return 1;
+			break;
+		case IORESOURCE_IRQ:
+			irq = &option->u.irq;
+			if (start < PNP_IRQ_NR &&
+			    test_bit(start, irq->map.bits))
+				return 1;
+			break;
+		case IORESOURCE_DMA:
+			dma = &option->u.dma;
+			if (dma->map & (1 << start))
+				return 1;
+			break;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(pnp_possible_config);
+
+int pnp_range_reserved(resource_size_t start, resource_size_t end)
+{
+	struct pnp_dev *dev;
+	struct pnp_resource *pnp_res;
+	resource_size_t *dev_start, *dev_end;
+
+	pnp_for_each_dev(dev) {
+		list_for_each_entry(pnp_res, &dev->resources, list) {
+			dev_start = &pnp_res->res.start;
+			dev_end   = &pnp_res->res.end;
+			if (ranged_conflict(&start, &end, dev_start, dev_end))
+				return 1;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(pnp_range_reserved);
+
+/* format is: pnp_reserve_irq=irq1[,irq2] .... */
+static int __init pnp_setup_reserve_irq(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_irq[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
+
+/* format is: pnp_reserve_dma=dma1[,dma2] .... */
+static int __init pnp_setup_reserve_dma(char *str)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		if (get_option(&str, &pnp_reserve_dma[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
+
+/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
+static int __init pnp_setup_reserve_io(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_io[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_io=", pnp_setup_reserve_io);
+
+/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
+static int __init pnp_setup_reserve_mem(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_mem[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);
diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c
new file mode 100644
index 000000000..e4f53d311
--- /dev/null
+++ b/drivers/pnp/support.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * support.c - standard functions for the use of pnp protocol drivers
+ *
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include "base.h"
+
+/**
+ * pnp_is_active - Determines if a device is active based on its current
+ *	resources
+ * @dev: pointer to the desired PnP device
+ */
+int pnp_is_active(struct pnp_dev *dev)
+{
+	/*
+	 * I don't think this is very reliable because pnp_disable_dev()
+	 * only clears out auto-assigned resources.
+	 */
+	if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
+	    !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
+	    pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
+		return 0;
+	else
+		return 1;
+}
+
+EXPORT_SYMBOL(pnp_is_active);
+
+/*
+ * Functionally similar to acpi_ex_eisa_id_to_string(), but that's
+ * buried in the ACPI CA, and we can't depend on it being present.
+ */
+void pnp_eisa_id_to_string(u32 id, char *str)
+{
+	id = be32_to_cpu(id);
+
+	/*
+	 * According to the specs, the first three characters are five-bit
+	 * compressed ASCII, and the left-over high order bit should be zero.
+	 * However, the Linux ISAPNP code historically used six bits for the
+	 * first character, and there seem to be IDs that depend on that,
+	 * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
+	 * FreeBSD sys/pc98/cbus/sio_cbus.c driver.
+	 */
+	str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
+	str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
+	str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
+	str[3] = hex_asc_hi(id >> 8);
+	str[4] = hex_asc_lo(id >> 8);
+	str[5] = hex_asc_hi(id);
+	str[6] = hex_asc_lo(id);
+	str[7] = '\0';
+}
+
+char *pnp_resource_type_name(struct resource *res)
+{
+	switch (pnp_resource_type(res)) {
+	case IORESOURCE_IO:
+		return "io";
+	case IORESOURCE_MEM:
+		return "mem";
+	case IORESOURCE_IRQ:
+		return "irq";
+	case IORESOURCE_DMA:
+		return "dma";
+	case IORESOURCE_BUS:
+		return "bus";
+	}
+	return "unknown";
+}
+
+void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
+{
+	struct pnp_resource *pnp_res;
+
+	if (list_empty(&dev->resources))
+		pnp_dbg(&dev->dev, "%s: no current resources\n", desc);
+	else {
+		pnp_dbg(&dev->dev, "%s: current resources:\n", desc);
+		list_for_each_entry(pnp_res, &dev->resources, list)
+			pnp_dbg(&dev->dev, "%pr\n", &pnp_res->res);
+	}
+}
+
+char *pnp_option_priority_name(struct pnp_option *option)
+{
+	switch (pnp_option_priority(option)) {
+	case PNP_RES_PRIORITY_PREFERRED:
+		return "preferred";
+	case PNP_RES_PRIORITY_ACCEPTABLE:
+		return "acceptable";
+	case PNP_RES_PRIORITY_FUNCTIONAL:
+		return "functional";
+	}
+	return "invalid";
+}
+
+void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option)
+{
+	char buf[128];
+	int len = 0, i;
+	struct pnp_port *port;
+	struct pnp_mem *mem;
+	struct pnp_irq *irq;
+	struct pnp_dma *dma;
+
+	if (pnp_option_is_dependent(option))
+		len += scnprintf(buf + len, sizeof(buf) - len,
+				 "  dependent set %d (%s) ",
+				 pnp_option_set(option),
+				 pnp_option_priority_name(option));
+	else
+		len += scnprintf(buf + len, sizeof(buf) - len,
+				 "  independent ");
+
+	switch (option->type) {
+	case IORESOURCE_IO:
+		port = &option->u.port;
+		len += scnprintf(buf + len, sizeof(buf) - len, "io  min %#llx "
+				 "max %#llx align %lld size %lld flags %#x",
+				 (unsigned long long) port->min,
+				 (unsigned long long) port->max,
+				 (unsigned long long) port->align,
+				 (unsigned long long) port->size, port->flags);
+		break;
+	case IORESOURCE_MEM:
+		mem = &option->u.mem;
+		len += scnprintf(buf + len, sizeof(buf) - len, "mem min %#llx "
+				 "max %#llx align %lld size %lld flags %#x",
+				 (unsigned long long) mem->min,
+				 (unsigned long long) mem->max,
+				 (unsigned long long) mem->align,
+				 (unsigned long long) mem->size, mem->flags);
+		break;
+	case IORESOURCE_IRQ:
+		irq = &option->u.irq;
+		len += scnprintf(buf + len, sizeof(buf) - len, "irq");
+		if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 " <none>");
+		else {
+			for (i = 0; i < PNP_IRQ_NR; i++)
+				if (test_bit(i, irq->map.bits))
+					len += scnprintf(buf + len,
+							 sizeof(buf) - len,
+							 " %d", i);
+		}
+		len += scnprintf(buf + len, sizeof(buf) - len, " flags %#x",
+				 irq->flags);
+		if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 " (optional)");
+		break;
+	case IORESOURCE_DMA:
+		dma = &option->u.dma;
+		len += scnprintf(buf + len, sizeof(buf) - len, "dma");
+		if (!dma->map)
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 " <none>");
+		else {
+			for (i = 0; i < 8; i++)
+				if (dma->map & (1 << i))
+					len += scnprintf(buf + len,
+							 sizeof(buf) - len,
+							 " %d", i);
+		}
+		len += scnprintf(buf + len, sizeof(buf) - len, " (bitmask %#x) "
+				 "flags %#x", dma->map, dma->flags);
+		break;
+	}
+	pnp_dbg(&dev->dev, "%s\n", buf);
+}
diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c
new file mode 100644
index 000000000..695050374
--- /dev/null
+++ b/drivers/pnp/system.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * system.c - a driver for reserving pnp system resources
+ *
+ * Some code is based on pnpbios_core.c
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+
+static const struct pnp_device_id pnp_dev_table[] = {
+	/* General ID for reserving resources */
+	{"PNP0c02", 0},
+	/* memory controller */
+	{"PNP0c01", 0},
+	{"", 0}
+};
+
+static void reserve_range(struct pnp_dev *dev, struct resource *r, int port)
+{
+	char *regionid;
+	const char *pnpid = dev_name(&dev->dev);
+	resource_size_t start = r->start, end = r->end;
+	struct resource *res;
+
+	regionid = kmalloc(16, GFP_KERNEL);
+	if (!regionid)
+		return;
+
+	snprintf(regionid, 16, "pnp %s", pnpid);
+	if (port)
+		res = request_region(start, end - start + 1, regionid);
+	else
+		res = request_mem_region(start, end - start + 1, regionid);
+	if (res)
+		res->flags &= ~IORESOURCE_BUSY;
+	else
+		kfree(regionid);
+
+	/*
+	 * Failures at this point are usually harmless. pci quirks for
+	 * example do reserve stuff they know about too, so we may well
+	 * have double reservations.
+	 */
+	dev_info(&dev->dev, "%pR %s reserved\n", r,
+		 res ? "has been" : "could not be");
+}
+
+static void reserve_resources_of_dev(struct pnp_dev *dev)
+{
+	struct resource *res;
+	int i;
+
+	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
+		if (res->flags & IORESOURCE_DISABLED)
+			continue;
+		if (res->start == 0)
+			continue;	/* disabled */
+		if (res->start < 0x100)
+			/*
+			 * Below 0x100 is only standard PC hardware
+			 * (pics, kbd, timer, dma, ...)
+			 * We should not get resource conflicts there,
+			 * and the kernel reserves these anyway
+			 * (see arch/i386/kernel/setup.c).
+			 * So, do nothing
+			 */
+			continue;
+		if (res->end < res->start)
+			continue;	/* invalid */
+
+		reserve_range(dev, res, 1);
+	}
+
+	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
+		if (res->flags & IORESOURCE_DISABLED)
+			continue;
+
+		reserve_range(dev, res, 0);
+	}
+}
+
+static int system_pnp_probe(struct pnp_dev *dev,
+			    const struct pnp_device_id *dev_id)
+{
+	reserve_resources_of_dev(dev);
+	return 0;
+}
+
+static struct pnp_driver system_pnp_driver = {
+	.name     = "system",
+	.id_table = pnp_dev_table,
+	.flags    = PNP_DRIVER_RES_DO_NOT_CHANGE,
+	.probe    = system_pnp_probe,
+};
+
+static int __init pnp_system_init(void)
+{
+	return pnp_register_driver(&system_pnp_driver);
+}
+
+/**
+ * Reserve motherboard resources after PCI claim BARs,
+ * but before PCI assign resources for uninitialized PCI devices
+ */
+fs_initcall(pnp_system_init);