Linux-2.6.12-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!

7 files changed, 2371 insertions, 0 deletions

diff --git a/drivers/pnp/pnpbios/Kconfig b/drivers/pnp/pnpbios/Kconfig
new file mode 100644
index 0000000..fab848c
--- /dev/null
+++ b/drivers/pnp/pnpbios/Kconfig
@@ -0,0 +1,42 @@
+#
+# Plug and Play BIOS configuration
+#
+config PNPBIOS
+	bool "Plug and Play BIOS support (EXPERIMENTAL)"
+	depends on PNP && ISA && X86 && EXPERIMENTAL
+	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 0000000..3cd3ed7
--- /dev/null
+++ b/drivers/pnp/pnpbios/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the kernel PNPBIOS driver.
+#
+
+pnpbios-proc-$(CONFIG_PNPBIOS_PROC_FS) = proc.o
+
+obj-y := core.o bioscalls.o rsparser.o $(pnpbios-proc-y)
diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
new file mode 100644
index 0000000..6b7583f
--- /dev/null
+++ b/drivers/pnp/pnpbios/bioscalls.c
@@ -0,0 +1,544 @@
+/*
+ * 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/pnpbios.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/slab.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/system.h>
+#include <asm/byteorder.h>
+
+#include "pnpbios.h"
+
+static struct {
+	u16	offset;
+	u16	segment;
+} pnp_bios_callpoint;
+
+
+/* The PnP BIOS entries in the GDT */
+#define PNP_GDT    (GDT_ENTRY_PNPBIOS_BASE * 8)
+
+#define PNP_CS32   (PNP_GDT+0x00)	/* segment for calling fn */
+#define PNP_CS16   (PNP_GDT+0x08)	/* code segment for BIOS */
+#define PNP_DS     (PNP_GDT+0x10)	/* data segment for BIOS */
+#define PNP_TS1    (PNP_GDT+0x18)	/* transfer data segment */
+#define PNP_TS2    (PNP_GDT+0x20)	/* another data segment */
+
+/*
+ * 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 void pnp_bios_callfunc(void);
+
+__asm__(
+	".text			\n"
+	__ALIGN_STR "\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 Q_SET_SEL(cpu, selname, address, size) \
+do { \
+set_base(per_cpu(cpu_gdt_table,cpu)[(selname) >> 3], __va((u32)(address))); \
+set_limit(per_cpu(cpu_gdt_table,cpu)[(selname) >> 3], size); \
+} while(0)
+
+#define Q2_SET_SEL(cpu, selname, address, size) \
+do { \
+set_base(per_cpu(cpu_gdt_table,cpu)[(selname) >> 3], (u32)(address)); \
+set_limit(per_cpu(cpu_gdt_table,cpu)[(selname) >> 3], size); \
+} while(0)
+
+static struct desc_struct bad_bios_desc = { 0, 0x00409200 };
+
+/*
+ * At some point we want to use this stack frame pointer to unwind
+ * after PnP BIOS oopses.
+ */
+
+u32 pnp_bios_fault_esp;
+u32 pnp_bios_fault_eip;
+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 = per_cpu(cpu_gdt_table,cpu)[0x40 / 8];
+	per_cpu(cpu_gdt_table,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);
+
+	per_cpu(cpu_gdt_table,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 occured\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;
+	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_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0,
+			       nodenum, sizeof(char), data, 65536);
+	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;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x03, "get event"
+ */
+static int pnp_bios_get_event(u16 *event)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0,
+			       event, sizeof(u16), NULL, 0);
+	return status;
+}
+#endif
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x04, "send message"
+ */
+static int pnp_bios_send_message(u16 message)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+	return status;
+}
+#endif
+
+/*
+ * 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;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x09, "set statically allocated resource
+ * information"
+ */
+static int pnp_bios_set_stat_res(char *info)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
+			       info, *((u16 *) info), 0, 0);
+	return status;
+}
+#endif
+
+/*
+ * 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;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x0b, "get APM id table"
+ */
+static int pnp_bios_apm_id_table(char *table, u16 *size)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0,
+			       table, *size, size, sizeof(u16));
+	return status;
+}
+#endif
+
+/*
+ * 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;
+}
+
+#if needed
+/*
+ * Call PnP BIOS function 0x43, "write ESCD"
+ */
+static int pnp_bios_write_escd(char *data, u32 nvram_base)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
+			       data, 65536, __va(nvram_base), 65536);
+	return status;
+}
+#endif
+
+
+/*
+ * Initialization
+ */
+
+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;
+
+	set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
+	_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
+	for(i=0; i < NR_CPUS; i++)
+	{
+		Q2_SET_SEL(i, PNP_CS32, &pnp_bios_callfunc, 64 * 1024);
+		Q_SET_SEL(i, PNP_CS16, header->fields.pm16cseg, 64 * 1024);
+		Q_SET_SEL(i, PNP_DS, header->fields.pm16dseg, 64 * 1024);
+	}
+}
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
new file mode 100644
index 0000000..0f6330b
--- /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);
diff --git a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h
new file mode 100644
index 0000000..01896e7
--- /dev/null
+++ b/drivers/pnp/pnpbios/pnpbios.h
@@ -0,0 +1,47 @@
+/*
+ * pnpbios.h - contains local definitions
+ */
+
+#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 void *pnpbios_kmalloc(size_t size, int f);
+
+extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node);
+extern int pnpbios_read_resources_from_node(struct pnp_resource_table *res, struct pnp_bios_node * node);
+extern int pnpbios_write_resources_to_node(struct pnp_resource_table *res, 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 0000000..6bb8e19
--- /dev/null
+++ b/drivers/pnp/pnpbios/proc.c
@@ -0,0 +1,292 @@
+/*
+ * /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.
+ *     http://home.t-online.de/home/gunther.mayer/lsescd
+ *
+ * The .../legacy_device_resources file is not used yet.
+ *
+ * The other files are human-readable.
+ */
+
+//#include <pcmcia/config.h>
+//#include <pcmcia/k_compat.h>
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/pnpbios.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+
+#include "pnpbios.h"
+
+static struct proc_dir_entry *proc_pnp = NULL;
+static struct proc_dir_entry *proc_pnp_boot = NULL;
+
+static int proc_read_pnpconfig(char *buf, char **start, off_t pos,
+                               int count, int *eof, void *data)
+{
+	struct pnp_isa_config_struc pnps;
+
+	if (pnp_bios_isapnp_config(&pnps))
+		return -EIO;
+	return snprintf(buf, count,
+		"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
+	);
+}
+
+static int proc_read_escdinfo(char *buf, char **start, off_t pos,
+                              int count, int *eof, void *data)
+{
+	struct escd_info_struc escd;
+
+	if (pnp_bios_escd_info(&escd))
+		return -EIO;
+	return snprintf(buf, count,
+		"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
+	);
+}
+
+#define MAX_SANE_ESCD_SIZE (32*1024)
+static int proc_read_escd(char *buf, char **start, off_t pos,
+                          int count, int *eof, void *data)
+{
+	struct escd_info_struc escd;
+	char *tmpbuf;
+	int escd_size, escd_left_to_read, n;
+
+	if (pnp_bios_escd_info(&escd))
+		return -EIO;
+
+	/* sanity check */
+	if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
+		printk(KERN_ERR "PnPBIOS: proc_read_escd: ESCD size reported by BIOS escd_info call is too great\n");
+		return -EFBIG;
+	}
+
+	tmpbuf = pnpbios_kmalloc(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: proc_read_escd: ESCD size reported by BIOS read_escd call is too great\n");
+		return -EFBIG;
+	}
+
+	escd_left_to_read = escd_size - pos;
+	if (escd_left_to_read < 0) escd_left_to_read = 0;
+	if (escd_left_to_read == 0) *eof = 1;
+	n = min(count,escd_left_to_read);
+	memcpy(buf, tmpbuf + pos, n);
+	kfree(tmpbuf);
+	*start = buf;
+	return n;
+}
+
+static int proc_read_legacyres(char *buf, char **start, off_t pos,
+                               int count, int *eof, void *data)
+{
+	/* Assume that the following won't overflow the buffer */
+	if (pnp_bios_get_stat_res(buf)) 
+		return -EIO;
+
+	return count;  // FIXME: Return actual length
+}
+
+static int proc_read_devices(char *buf, char **start, off_t pos,
+                             int count, int *eof, void *data)
+{
+	struct pnp_bios_node *node;
+	u8 nodenum;
+	char *p = buf;
+
+	if (pos >= 0xff)
+		return 0;
+
+	node = pnpbios_kmalloc(node_info.max_node_size, GFP_KERNEL);
+	if (!node) return -ENOMEM;
+
+	for (nodenum=pos; nodenum<0xff; ) {
+		u8 thisnodenum = nodenum;
+		/* 26 = the number of characters per line sprintf'ed */
+		if ((p - buf + 26) > count)
+			break;
+		if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
+			break;
+		p += sprintf(p, "%02x\t%08x\t%02x:%02x:%02x\t%04x\n",
+			     node->handle, node->eisa_id,
+			     node->type_code[0], node->type_code[1],
+			     node->type_code[2], 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);
+			*eof = 1;
+			break;
+		}
+	}
+	kfree(node);
+	if (nodenum == 0xff)
+		*eof = 1;
+	*start = (char *)((off_t)nodenum - pos);
+	return p - buf;
+}
+
+static int proc_read_node(char *buf, char **start, off_t pos,
+                          int count, int *eof, void *data)
+{
+	struct pnp_bios_node *node;
+	int boot = (long)data >> 8;
+	u8 nodenum = (long)data;
+	int len;
+
+	node = pnpbios_kmalloc(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);
+	memcpy(buf, node->data, len);
+	kfree(node);
+	return len;
+}
+
+static int proc_write_node(struct file *file, const char __user *buf,
+                           unsigned long count, void *data)
+{
+	struct pnp_bios_node *node;
+	int boot = (long)data >> 8;
+	u8 nodenum = (long)data;
+	int ret = count;
+
+	node = pnpbios_kmalloc(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;
+}
+
+int pnpbios_interface_attach_device(struct pnp_bios_node * node)
+{
+	char name[3];
+	struct proc_dir_entry *ent;
+
+	sprintf(name, "%02x", node->handle);
+
+	if (!proc_pnp)
+		return -EIO;
+	if ( !pnpbios_dont_use_current_config ) {
+		ent = create_proc_entry(name, 0, proc_pnp);
+		if (ent) {
+			ent->read_proc = proc_read_node;
+			ent->write_proc = proc_write_node;
+			ent->data = (void *)(long)(node->handle);
+		}
+	}
+
+	if (!proc_pnp_boot)
+		return -EIO;
+	ent = create_proc_entry(name, 0, proc_pnp_boot);
+	if (ent) {
+		ent->read_proc = proc_read_node;
+		ent->write_proc = proc_write_node;
+		ent->data = (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("pnp", proc_bus);
+	if (!proc_pnp)
+		return -EIO;
+	proc_pnp_boot = proc_mkdir("boot", proc_pnp);
+	if (!proc_pnp_boot)
+		return -EIO;
+	create_proc_read_entry("devices", 0, proc_pnp, proc_read_devices, NULL);
+	create_proc_read_entry("configuration_info", 0, proc_pnp, proc_read_pnpconfig, NULL);
+	create_proc_read_entry("escd_info", 0, proc_pnp, proc_read_escdinfo, NULL);
+	create_proc_read_entry("escd", S_IRUSR, proc_pnp, proc_read_escd, NULL);
+	create_proc_read_entry("legacy_device_resources", 0, proc_pnp, proc_read_legacyres, NULL);
+
+	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("pnp", proc_bus);
+
+	return;
+}
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
new file mode 100644
index 0000000..618ac15
--- /dev/null
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -0,0 +1,795 @@
+/*
+ * rsparser.c - parses and encodes pnpbios resource data streams
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include <linux/pnpbios.h>
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#else
+inline void pcibios_penalize_isa_irq(int irq) {}
+#endif /* CONFIG_PCI */
+
+#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_irqresource(struct pnp_resource_table * res, int irq)
+{
+	int i = 0;
+	while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++;
+	if (i < PNP_MAX_IRQ) {
+		res->irq_resource[i].flags = IORESOURCE_IRQ;  // Also clears _UNSET flag
+		if (irq == -1) {
+			res->irq_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->irq_resource[i].start =
+		res->irq_resource[i].end = (unsigned long) irq;
+		pcibios_penalize_isa_irq(irq);
+	}
+}
+
+static void
+pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma)
+{
+	int i = 0;
+	while (!(res->dma_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_DMA) i++;
+	if (i < PNP_MAX_DMA) {
+		res->dma_resource[i].flags = IORESOURCE_DMA;  // Also clears _UNSET flag
+		if (dma == -1) {
+			res->dma_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->dma_resource[i].start =
+		res->dma_resource[i].end = (unsigned long) dma;
+	}
+}
+
+static void
+pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len)
+{
+	int i = 0;
+	while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++;
+	if (i < PNP_MAX_PORT) {
+		res->port_resource[i].flags = IORESOURCE_IO;  // Also clears _UNSET flag
+		if (len <= 0 || (io + len -1) >= 0x10003) {
+			res->port_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->port_resource[i].start = (unsigned long) io;
+		res->port_resource[i].end = (unsigned long)(io + len - 1);
+	}
+}
+
+static void
+pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len)
+{
+	int i = 0;
+	while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++;
+	if (i < PNP_MAX_MEM) {
+		res->mem_resource[i].flags = IORESOURCE_MEM;  // Also clears _UNSET flag
+		if (len <= 0) {
+			res->mem_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->mem_resource[i].start = (unsigned long) mem;
+		res->mem_resource[i].end = (unsigned long)(mem + len - 1);
+	}
+}
+
+static unsigned char *
+pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+	unsigned int len, tag;
+	int io, size, mask, i;
+
+	if (!p)
+		return NULL;
+
+	/* Blank the resource table values */
+	pnp_init_resource_table(res);
+
+	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(res, 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(res, 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(res, io, size);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			io = -1;
+			mask= p[1] + p[2]*256;
+			for (i=0;i<16;i++, mask=mask>>1)
+				if(mask & 0x01) io=i;
+			pnpbios_parse_allocated_irqresource(res, io);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			io = -1;
+			mask = p[1];
+			for (i=0;i<8;i++, mask = mask>>1)
+				if(mask & 0x01) io=i;
+			pnpbios_parse_allocated_dmaresource(res, io);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			io = p[2] + p[3] *256;
+			size = p[7];
+			pnpbios_parse_allocated_ioresource(res, 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(res, io, size);
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Resource Configuration Options
+ */
+
+static void
+pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = ((p[5] << 8) | p[4]) << 8;
+	mem->max = ((p[7] << 8) | p[6]) << 8;
+	mem->align = (p[9] << 8) | p[8];
+	mem->size = ((p[11] << 8) | p[10]) << 8;
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
+	mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	mem->align = 0;
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_irq * irq;
+	unsigned long bits;
+
+	irq = pnpbios_kmalloc(sizeof(struct pnp_irq), GFP_KERNEL);
+	if (!irq)
+		return;
+	bits = (p[2] << 8) | p[1];
+	bitmap_copy(irq->map, &bits, 16);
+	if (size > 2)
+		irq->flags = p[3];
+	else
+		irq->flags = IORESOURCE_IRQ_HIGHEDGE;
+	pnp_register_irq_resource(option,irq);
+	return;
+}
+
+static void
+pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_dma * dma;
+	dma = pnpbios_kmalloc(sizeof(struct pnp_dma), GFP_KERNEL);
+	if (!dma)
+		return;
+	dma->map = p[1];
+	dma->flags = p[2];
+	pnp_register_dma_resource(option,dma);
+	return;
+}
+
+static void
+pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_port * port;
+	port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL);
+	if (!port)
+		return;
+	port->min = (p[3] << 8) | p[2];
+	port->max = (p[5] << 8) | p[4];
+	port->align = p[6];
+	port->size = p[7];
+	port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
+	pnp_register_port_resource(option,port);
+	return;
+}
+
+static void
+pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_port * port;
+	port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL);
+	if (!port)
+		return;
+	port->min = port->max = (p[2] << 8) | p[1];
+	port->size = p[3];
+	port->align = 0;
+	port->flags = PNP_PORT_FLAG_FIXED;
+	pnp_register_port_resource(option,port);
+	return;
+}
+
+static unsigned char *
+pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
+{
+	unsigned int len, tag;
+	int priority = 0;
+	struct pnp_option *option, *option_independent;
+
+	if (!p)
+		return NULL;
+
+	option_independent = option = pnp_register_independent_option(dev);
+	if (!option)
+		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_parse_mem_option(p, len, option);
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_parse_mem32_option(p, len, option);
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_parse_fixed_mem32_option(p, len, option);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_parse_irq_option(p, len, option);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_parse_dma_option(p, len, option);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_parse_port_option(p, len, option);
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_parse_fixed_port_option(p, len, option);
+			break;
+
+		case SMALL_TAG_STARTDEP:
+			if (len > 1)
+				goto len_err;
+			priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
+			if (len > 0)
+				priority = 0x100 | p[1];
+			option = pnp_register_dependent_option(dev, priority);
+			if (!option)
+				return NULL;
+			break;
+
+		case SMALL_TAG_ENDDEP:
+			if (len != 0)
+				goto len_err;
+			if (option_independent == option)
+				printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
+			option = option_independent;
+			break;
+
+		case SMALL_TAG_END:
+			if (option_independent != option)
+				printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_ENDDEP tag\n");
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Compatible Device IDs
+ */
+
+#define HEX(id,a) hex[((id)>>a) & 15]
+#define CHAR(id,a) (0x40 + (((id)>>a) & 31))
+//
+
+void pnpid32_to_pnpid(u32 id, char *str)
+{
+	const char *hex = "0123456789abcdef";
+
+	id = be32_to_cpu(id);
+	str[0] = CHAR(id, 26);
+	str[1] = CHAR(id, 21);
+	str[2] = CHAR(id,16);
+	str[3] = HEX(id, 12);
+	str[4] = HEX(id, 8);
+	str[5] = HEX(id, 4);
+	str[6] = HEX(id, 0);
+	str[7] = '\0';
+
+	return;
+}
+//
+#undef CHAR
+#undef HEX
+
+static unsigned char *
+pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev)
+{
+	int len, tag;
+	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;
+			dev_id =  pnpbios_kmalloc(sizeof (struct pnp_id), GFP_KERNEL);
+			if (!dev_id)
+				return NULL;
+			memset(dev_id, 0, sizeof(struct pnp_id));
+			pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id);
+			memcpy(&dev_id->id, id, 7);
+			pnp_add_id(dev_id, dev);
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Allocated Resource Encoding
+ */
+
+static void pnpbios_encode_mem(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	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;
+	return;
+}
+
+static void pnpbios_encode_mem32(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	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;
+	return;
+}
+
+static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res)
+{	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	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;
+	return;
+}
+
+static void pnpbios_encode_irq(unsigned char *p, struct resource * res)
+{
+	unsigned long map = 0;
+	map = 1 << res->start;
+	p[1] = map & 0xff;
+	p[2] = (map >> 8) & 0xff;
+	return;
+}
+
+static void pnpbios_encode_dma(unsigned char *p, struct resource * res)
+{
+	unsigned long map = 0;
+	map = 1 << res->start;
+	p[1] = map & 0xff;
+	return;
+}
+
+static void pnpbios_encode_port(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[2] = base & 0xff;
+	p[3] = (base >> 8) & 0xff;
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[7] = len & 0xff;
+	return;
+}
+
+static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[1] = base & 0xff;
+	p[2] = (base >> 8) & 0xff;
+	p[3] = len & 0xff;
+	return;
+}
+
+static unsigned char *
+pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+	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(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_encode_mem32(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_encode_irq(p, &res->irq_resource[irq]);
+			irq++;
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_encode_dma(p, &res->dma_resource[dma]);
+			dma++;
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_encode_port(p, &res->port_resource[port]);
+			port++;
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_encode_fixed_port(p, &res->port_resource[port]);
+			port++;
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Core Parsing Functions
+ */
+
+int
+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(p,end,&dev->res);
+	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_resource_table *res,
+				 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(p,end,res);
+	if (!p)
+		return -EIO;
+	return 0;
+}
+
+int
+pnpbios_write_resources_to_node(struct pnp_resource_table *res,
+				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(p,end,res);
+	if (!p)
+		return -EIO;
+	return 0;
+}