Resguardo inicial

linux-7.2.3/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 || (HAS_IOPORT && COMPILE_TEST)
+	help
+	  Say Y here if you would like support for ISA Plug and Play devices.
+	  Some information is in <file:Documentation/userspace-api/isapnp.rst>.
+
+	  If unsure, say Y.

linux-7.2.3/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

linux-7.2.3/drivers/pnp/isapnp/compat.c

@@ -0,0 +1,66 @@
+// 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);

linux-7.2.3/drivers/pnp/isapnp/proc.c

@@ -0,0 +1,86 @@
+// 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;
+	char name[16];
+
+	if (!bus->procdir) {
+		sprintf(name, "%02x", bus->number);
+		bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
+		if (!bus->procdir)
+			return -ENOMEM;
+	}
+	sprintf(name, "%02x", dev->number);
+	dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, bus->procdir,
+					    &isapnp_proc_bus_proc_ops, dev);
+	if (!dev->procent)
+		return -ENOMEM;
+	proc_set_size(dev->procent, 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;
+}