Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 644 insertions, 0 deletions

diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
new file mode 100644
index 000000000000..0f6330b3af12
--- /dev/null
+++ b/drivers/pnp/pnpbios/core.c
@@ -0,0 +1,644 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ 
+/* 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/module.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/pnpbios.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/slab.h>
+#include <linux/kobject_uevent.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/system.h>
+#include <asm/byteorder.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;
+
+void *pnpbios_kmalloc(size_t size, int f)
+{
+	void *p = kmalloc( size, f );
+	if ( p == NULL )
+		printk(KERN_ERR "PnPBIOS: kmalloc() failed\n");
+	else
+		memset(p, 0, size);
+	return p;
+}
+
+/*
+ *
+ * DOCKING FUNCTIONS
+ *
+ */
+
+#ifdef CONFIG_HOTPLUG
+
+static int unloading = 0;
+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)
+{
+	char *argv [3], **envp, *buf, *scratch;
+	int i = 0, value;
+
+	if (!hotplug_path [0])
+		return -ENOENT;
+	if (!current->fs->root) {
+		return -EAGAIN;
+	}
+	if (!(envp = (char **) pnpbios_kmalloc (20 * sizeof (char *), GFP_KERNEL))) {
+		return -ENOMEM;
+	}
+	if (!(buf = pnpbios_kmalloc (256, GFP_KERNEL))) {
+		kfree (envp);
+		return -ENOMEM;
+	}
+
+	/* only one standardized param to hotplug command: type */
+	argv [0] = hotplug_path;
+	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 (argv [0], argv, envp, 0);
+	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;
+	daemonize("kpnpbiosd");
+	allow_signal(SIGKILL);
+	while(!unloading && !signal_pending(current))
+	{
+		int status;
+		
+		/*
+		 * Poll every 2 seconds
+		 */
+		msleep_interruptible(2000);
+
+		if(signal_pending(current)) {
+			if (try_to_freeze(PF_FREEZE))
+				continue;
+			break;
+		}
+
+		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 );
+				continue;
+		}
+		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);
+}
+
+#endif   /* CONFIG_HOTPLUG */
+
+static int pnpbios_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+{
+	u8 nodenum = dev->number;
+	struct pnp_bios_node * node;
+
+	/* just in case */
+	if(!pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	node = pnpbios_kmalloc(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(res, node);
+	dev->active = pnp_is_active(dev);
+	kfree(node);
+	return 0;
+}
+
+static int pnpbios_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+{
+	u8 nodenum = dev->number;
+	struct pnp_bios_node * node;
+	int ret;
+
+	/* just in case */
+	if (!pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	node = pnpbios_kmalloc(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(res, 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;
+
+	/* just in case */
+	if(dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))
+		return -EPERM;
+
+	node = pnpbios_kmalloc(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 insert_device(struct pnp_dev *dev, struct pnp_bios_node * node)
+{
+	struct list_head * pos;
+	struct pnp_dev * pnp_dev;
+	struct pnp_id *dev_id;
+	char id[8];
+
+	/* check if the device is already added */
+	dev->number = node->handle;
+	list_for_each (pos, &pnpbios_protocol.devices){
+		pnp_dev = list_entry(pos, struct pnp_dev, protocol_list);
+		if (dev->number == pnp_dev->number)
+			return -1;
+	}
+
+	/* set the initial values for the PnP device */
+	dev_id = pnpbios_kmalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	if (!dev_id)
+		return -1;
+	pnpid32_to_pnpid(node->eisa_id,id);
+	memcpy(dev_id->id,id,7);
+	pnp_add_id(dev_id, dev);
+	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))
+		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;
+	dev->protocol = &pnpbios_protocol;
+
+	/* clear out the damaged flags */
+	if (!dev->active)
+		pnp_init_resource_table(&dev->res);
+
+	pnp_add_device(dev);
+	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;
+	struct pnp_dev *dev;
+
+	node = pnpbios_kmalloc(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++;
+		dev =  pnpbios_kmalloc(sizeof (struct pnp_dev), GFP_KERNEL);
+		if (!dev)
+			break;
+		if(insert_device(dev,node)<0)
+			kfree(dev);
+		else
+			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; /* = 0 */
+int pnpbios_dont_use_current_config; /* = 0 */
+
+#ifndef MODULE
+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);
+#endif
+
+/* 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(struct dmi_system_id *d)
+{
+	printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident);
+	return 0;
+}
+
+static struct dmi_system_id pnpbios_dmi_table[] = {
+	{	/* 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)) {
+		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();
+
+	return 0;
+}
+
+subsys_initcall(pnpbios_init);
+
+static int __init pnpbios_thread_init(void)
+{
+	if (pnpbios_disabled)
+		return 0;
+#ifdef CONFIG_HOTPLUG
+	init_completion(&unload_sem);
+	if (kernel_thread(pnp_dock_thread, NULL, CLONE_KERNEL) > 0)
+		unloading = 0;
+#endif
+	return 0;
+}
+
+#ifndef MODULE
+
+/* init/main.c calls pnpbios_init early */
+
+/* Start the kernel thread later: */
+module_init(pnpbios_thread_init);
+
+#else
+
+/*
+ * N.B.: Building pnpbios as a module hasn't been fully implemented
+ */
+
+MODULE_LICENSE("GPL");
+
+static int __init pnpbios_init_all(void)
+{
+	int r;
+
+	r = pnpbios_init();
+	if (r)
+		return r;
+	r = pnpbios_thread_init();
+	if (r)
+		return r;
+	return 0;
+}
+
+static void __exit pnpbios_exit(void)
+{
+#ifdef CONFIG_HOTPLUG
+	unloading = 1;
+	wait_for_completion(&unload_sem);
+#endif
+	pnpbios_proc_exit();
+	/* We ought to free resources here */
+	return;
+}
+
+module_init(pnpbios_init_all);
+module_exit(pnpbios_exit);
+
+#endif
+
+EXPORT_SYMBOL(pnpbios_protocol);