[mirror_ubuntu-zesty-kernel.git] / drivers / char / tpm / tpm.h

/*
 * Copyright (C) 2004 IBM Corporation
 *
 * Authors:
 * Leendert van Doorn <leendert@watson.ibm.com>
 * Dave Safford <safford@watson.ibm.com>
 * Reiner Sailer <sailer@watson.ibm.com>
 * Kylene Hall <kjhall@us.ibm.com>
 *
 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
 *
 * Device driver for TCG/TCPA TPM (trusted platform module).
 * Specifications at www.trustedcomputinggroup.org	 
 *
 * 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, version 2 of the
 * License.
 * 
 */
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/miscdevice.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>

enum tpm_const {
	TPM_MINOR = 224,	/* officially assigned */
	TPM_BUFSIZE = 4096,
	TPM_NUM_DEVICES = 256,
};

enum tpm_timeout {
	TPM_TIMEOUT = 5,	/* msecs */
};

/* TPM addresses */
enum tpm_addr {
	TPM_SUPERIO_ADDR = 0x2E,
	TPM_ADDR = 0x4E,
};

#define TPM_WARN_DOING_SELFTEST 0x802
#define TPM_ERR_DEACTIVATED     0x6
#define TPM_ERR_DISABLED        0x7
#define TPM_ERR_INVALID_POSTINIT 38

#define TPM_HEADER_SIZE		10
extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
				const char *, size_t);
extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
				char *);
extern ssize_t tpm_show_temp_deactivated(struct device *,
					 struct device_attribute *attr, char *);
extern ssize_t tpm_show_durations(struct device *,
				  struct device_attribute *attr, char *);
extern ssize_t tpm_show_timeouts(struct device *,
				 struct device_attribute *attr, char *);

struct tpm_chip;

struct tpm_vendor_specific {
	const u8 req_complete_mask;
	const u8 req_complete_val;
	const u8 req_canceled;
	void __iomem *iobase;		/* ioremapped address */
	unsigned long base;		/* TPM base address */

	int irq;
	int probed_irq;

	int region_size;
	int have_region;

	int (*recv) (struct tpm_chip *, u8 *, size_t);
	int (*send) (struct tpm_chip *, u8 *, size_t);
	void (*cancel) (struct tpm_chip *);
	u8 (*status) (struct tpm_chip *);
	void (*release) (struct device *);
	struct miscdevice miscdev;
	struct attribute_group *attr_group;
	struct list_head list;
	int locality;
	unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
	bool timeout_adjusted;
	unsigned long duration[3]; /* jiffies */
	bool duration_adjusted;
	void *data;

	wait_queue_head_t read_queue;
	wait_queue_head_t int_queue;
};

#define TPM_VID_INTEL    0x8086

struct tpm_chip {
	struct device *dev;	/* Device stuff */

	int dev_num;		/* /dev/tpm# */
	unsigned long is_open;	/* only one allowed */
	int time_expired;

	/* Data passed to and from the tpm via the read/write calls */
	u8 *data_buffer;
	atomic_t data_pending;
	struct mutex buffer_mutex;

	struct timer_list user_read_timer;	/* user needs to claim result */
	struct work_struct work;
	struct mutex tpm_mutex;	/* tpm is processing */

	struct tpm_vendor_specific vendor;

	struct dentry **bios_dir;

	struct list_head list;
	void (*release) (struct device *);
};

#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)

static inline void tpm_chip_put(struct tpm_chip *chip)
{
	module_put(chip->dev->driver->owner);
}

static inline int tpm_read_index(int base, int index)
{
	outb(index, base);
	return inb(base+1) & 0xFF;
}

static inline void tpm_write_index(int base, int index, int value)
{
	outb(index, base);
	outb(value & 0xFF, base+1);
}
struct tpm_input_header {
	__be16	tag;
	__be32	length;
	__be32	ordinal;
}__attribute__((packed));

struct tpm_output_header {
	__be16	tag;
	__be32	length;
	__be32	return_code;
}__attribute__((packed));

struct	stclear_flags_t {
	__be16	tag;
	u8	deactivated;
	u8	disableForceClear;
	u8	physicalPresence;
	u8	physicalPresenceLock;
	u8	bGlobalLock;
}__attribute__((packed));

struct	tpm_version_t {
	u8	Major;
	u8	Minor;
	u8	revMajor;
	u8	revMinor;
}__attribute__((packed));

struct	tpm_version_1_2_t {
	__be16	tag;
	u8	Major;
	u8	Minor;
	u8	revMajor;
	u8	revMinor;
}__attribute__((packed));

struct	timeout_t {
	__be32	a;
	__be32	b;
	__be32	c;
	__be32	d;
}__attribute__((packed));

struct duration_t {
	__be32	tpm_short;
	__be32	tpm_medium;
	__be32	tpm_long;
}__attribute__((packed));

struct permanent_flags_t {
	__be16	tag;
	u8	disable;
	u8	ownership;
	u8	deactivated;
	u8	readPubek;
	u8	disableOwnerClear;
	u8	allowMaintenance;
	u8	physicalPresenceLifetimeLock;
	u8	physicalPresenceHWEnable;
	u8	physicalPresenceCMDEnable;
	u8	CEKPUsed;
	u8	TPMpost;
	u8	TPMpostLock;
	u8	FIPS;
	u8	operator;
	u8	enableRevokeEK;
	u8	nvLocked;
	u8	readSRKPub;
	u8	tpmEstablished;
	u8	maintenanceDone;
	u8	disableFullDALogicInfo;
}__attribute__((packed));

typedef union {
	struct	permanent_flags_t perm_flags;
	struct	stclear_flags_t	stclear_flags;
	bool	owned;
	__be32	num_pcrs;
	struct	tpm_version_t	tpm_version;
	struct	tpm_version_1_2_t tpm_version_1_2;
	__be32	manufacturer_id;
	struct timeout_t  timeout;
	struct duration_t duration;
} cap_t;

struct	tpm_getcap_params_in {
	__be32	cap;
	__be32	subcap_size;
	__be32	subcap;
}__attribute__((packed));

struct	tpm_getcap_params_out {
	__be32	cap_size;
	cap_t	cap;
}__attribute__((packed));

struct	tpm_readpubek_params_out {
	u8	algorithm[4];
	u8	encscheme[2];
	u8	sigscheme[2];
	__be32	paramsize;
	u8	parameters[12]; /*assuming RSA*/
	__be32	keysize;
	u8	modulus[256];
	u8	checksum[20];
}__attribute__((packed));

typedef union {
	struct	tpm_input_header in;
	struct	tpm_output_header out;
} tpm_cmd_header;

#define TPM_DIGEST_SIZE 20
struct tpm_pcrread_out {
	u8	pcr_result[TPM_DIGEST_SIZE];
}__attribute__((packed));

struct tpm_pcrread_in {
	__be32	pcr_idx;
}__attribute__((packed));

struct tpm_pcrextend_in {
	__be32	pcr_idx;
	u8	hash[TPM_DIGEST_SIZE];
}__attribute__((packed));

/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
 * bytes, but 128 is still a relatively large number of random bytes and
 * anything much bigger causes users of struct tpm_cmd_t to start getting
 * compiler warnings about stack frame size. */
#define TPM_MAX_RNG_DATA	128

struct tpm_getrandom_out {
	__be32 rng_data_len;
	u8     rng_data[TPM_MAX_RNG_DATA];
}__attribute__((packed));

struct tpm_getrandom_in {
	__be32 num_bytes;
}__attribute__((packed));

struct tpm_startup_in {
	__be16	startup_type;
} __packed;

typedef union {
	struct	tpm_getcap_params_out getcap_out;
	struct	tpm_readpubek_params_out readpubek_out;
	u8	readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
	struct	tpm_getcap_params_in getcap_in;
	struct	tpm_pcrread_in	pcrread_in;
	struct	tpm_pcrread_out	pcrread_out;
	struct	tpm_pcrextend_in pcrextend_in;
	struct	tpm_getrandom_in getrandom_in;
	struct	tpm_getrandom_out getrandom_out;
	struct tpm_startup_in startup_in;
} tpm_cmd_params;

struct tpm_cmd_t {
	tpm_cmd_header	header;
	tpm_cmd_params	params;
}__attribute__((packed));

ssize_t	tpm_getcap(struct device *, __be32, cap_t *, const char *);

extern int tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
extern struct tpm_chip* tpm_register_hardware(struct device *,
				 const struct tpm_vendor_specific *);
extern int tpm_open(struct inode *, struct file *);
extern int tpm_release(struct inode *, struct file *);
extern void tpm_dev_vendor_release(struct tpm_chip *);
extern ssize_t tpm_write(struct file *, const char __user *, size_t,
			 loff_t *);
extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
extern void tpm_remove_hardware(struct device *);
extern int tpm_pm_suspend(struct device *);
extern int tpm_pm_resume(struct device *);
extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
			     wait_queue_head_t *);

#ifdef CONFIG_ACPI
extern int tpm_add_ppi(struct kobject *);
extern void tpm_remove_ppi(struct kobject *);
#else
static inline int tpm_add_ppi(struct kobject *parent)
{
	return 0;
}

static inline void tpm_remove_ppi(struct kobject *parent)
{
}
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2004 IBM Corporation
	3	*
	4	* Authors:
	5	* Leendert van Doorn <leendert@watson.ibm.com>
	6	* Dave Safford <safford@watson.ibm.com>
	7	* Reiner Sailer <sailer@watson.ibm.com>
	8	* Kylene Hall <kjhall@us.ibm.com>
	9	*
8e81cc13	10	* Maintained by: <tpmdd-devel@lists.sourceforge.net>
1da177e4 LT	11	*
	12	* Device driver for TCG/TCPA TPM (trusted platform module).
	13	* Specifications at www.trustedcomputinggroup.org
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License as
	17	* published by the Free Software Foundation, version 2 of the
	18	* License.
	19	*
	20	*/
	21	#include <linux/module.h>
1da177e4 LT	22	#include <linux/delay.h>
1da177e4 LT	23	#include <linux/fs.h>
d081d470	24	#include <linux/mutex.h>
914e2637	25	#include <linux/sched.h>
1da177e4	26	#include <linux/miscdevice.h>
bbc5b212	27	#include <linux/platform_device.h>
276ad0c1	28	#include <linux/io.h>
659aaf2b	29	#include <linux/tpm.h>
1da177e4	30
41ab999c KY	31	enum tpm_const {
	32	TPM_MINOR = 224, /* officially assigned */
	33	TPM_BUFSIZE = 4096,
	34	TPM_NUM_DEVICES = 256,
	35	};
	36
3122a88a KH	37	enum tpm_timeout {
	38	TPM_TIMEOUT = 5, /* msecs */
	39	};
1da177e4 LT	40
1da177e4 LT	41	/* TPM addresses */
3122a88a	42	enum tpm_addr {
daacdfa6	43	TPM_SUPERIO_ADDR = 0x2E,
3122a88a	44	TPM_ADDR = 0x4E,
3122a88a KH	45	};
3122a88a KH	46
68d6e671	47	#define TPM_WARN_DOING_SELFTEST 0x802
be405411 SB	48	#define TPM_ERR_DEACTIVATED 0x6
be405411 SB	49	#define TPM_ERR_DISABLED 0x7
c584af19	50	#define TPM_ERR_INVALID_POSTINIT 38
be405411	51
b9e3238a	52	#define TPM_HEADER_SIZE 10
6659ca2a KH	53	extern ssize_t tpm_show_pubek(struct device , struct device_attribute attr,
	54	char *);
	55	extern ssize_t tpm_show_pcrs(struct device , struct device_attribute attr,
	56	char *);
	57	extern ssize_t tpm_show_caps(struct device , struct device_attribute attr,
	58	char *);
08e96e48 KJH	59	extern ssize_t tpm_show_caps_1_2(struct device , struct device_attribute attr,
08e96e48 KJH	60	char *);
6659ca2a KH	61	extern ssize_t tpm_store_cancel(struct device , struct device_attribute attr,
6659ca2a KH	62	const char *, size_t);
08e96e48 KJH	63	extern ssize_t tpm_show_enabled(struct device , struct device_attribute attr,
	64	char *);
	65	extern ssize_t tpm_show_active(struct device , struct device_attribute attr,
	66	char *);
	67	extern ssize_t tpm_show_owned(struct device , struct device_attribute attr,
	68	char *);
	69	extern ssize_t tpm_show_temp_deactivated(struct device *,
	70	struct device_attribute attr, char );
04ab2293 SB	71	extern ssize_t tpm_show_durations(struct device *,
04ab2293 SB	72	struct device_attribute attr, char );
62592101 SB	73	extern ssize_t tpm_show_timeouts(struct device *,
62592101 SB	74	struct device_attribute attr, char );
1da177e4 LT	75
	76	struct tpm_chip;
	77
	78	struct tpm_vendor_specific {
e0dd03ca KJH	79	const u8 req_complete_mask;
	80	const u8 req_complete_val;
	81	const u8 req_canceled;
ad5ea3cc KJH	82	void __iomem iobase; / ioremapped address */
	83	unsigned long base; /* TPM base address */
	84
27084efe	85	int irq;
a7b66822	86	int probed_irq;
27084efe	87
ad5ea3cc KJH	88	int region_size;
ad5ea3cc KJH	89	int have_region;
1da177e4 LT	90
	91	int (recv) (struct tpm_chip , u8 *, size_t);
	92	int (send) (struct tpm_chip , u8 *, size_t);
	93	void (cancel) (struct tpm_chip );
b4ed3e3c	94	u8 (status) (struct tpm_chip );
5bd91f18	95	void (release) (struct device );
1da177e4	96	struct miscdevice miscdev;
6659ca2a	97	struct attribute_group *attr_group;
27084efe LD	98	struct list_head list;
27084efe LD	99	int locality;
36b20020	100	unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
62592101	101	bool timeout_adjusted;
36b20020	102	unsigned long duration[3]; /* jiffies */
04ab2293	103	bool duration_adjusted;
132f7629	104	void *data;
27084efe LD	105
	106	wait_queue_head_t read_queue;
	107	wait_queue_head_t int_queue;
1da177e4 LT	108	};
1da177e4 LT	109
4e401fb0 SB	110	#define TPM_VID_INTEL 0x8086
4e401fb0 SB	111
1da177e4	112	struct tpm_chip {
e659a3fe	113	struct device dev; / Device stuff */
1da177e4 LT	114
1da177e4 LT	115	int dev_num; /* /dev/tpm# */
dc36d32c	116	unsigned long is_open; /* only one allowed */
1da177e4 LT	117	int time_expired;
	118
	119	/* Data passed to and from the tpm via the read/write calls */
	120	u8 *data_buffer;
	121	atomic_t data_pending;
d081d470	122	struct mutex buffer_mutex;
1da177e4 LT	123
1da177e4 LT	124	struct timer_list user_read_timer; /* user needs to claim result */
09e12f9f	125	struct work_struct work;
d081d470	126	struct mutex tpm_mutex; /* tpm is processing */
1da177e4	127
90dda520	128	struct tpm_vendor_specific vendor;
1da177e4	129
55a82ab3 KJH	130	struct dentry **bios_dir;
55a82ab3 KJH	131
1da177e4	132	struct list_head list;
5bd91f18	133	void (release) (struct device );
1da177e4 LT	134	};
1da177e4 LT	135
27084efe LD	136	#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
27084efe LD	137
a0e39349 MZ	138	static inline void tpm_chip_put(struct tpm_chip *chip)
	139	{
	140	module_put(chip->dev->driver->owner);
	141	}
	142
daacdfa6	143	static inline int tpm_read_index(int base, int index)
1da177e4	144	{
daacdfa6 KJH	145	outb(index, base);
daacdfa6 KJH	146	return inb(base+1) & 0xFF;
1da177e4 LT	147	}
1da177e4 LT	148
daacdfa6	149	static inline void tpm_write_index(int base, int index, int value)
1da177e4	150	{
daacdfa6 KJH	151	outb(index, base);
daacdfa6 KJH	152	outb(value & 0xFF, base+1);
1da177e4	153	}
08837438 RA	154	struct tpm_input_header {
	155	__be16 tag;
	156	__be32 length;
	157	__be32 ordinal;
	158	}__attribute__((packed));
	159
	160	struct tpm_output_header {
	161	__be16 tag;
	162	__be32 length;
	163	__be32 return_code;
	164	}__attribute__((packed));
	165
	166	struct stclear_flags_t {
	167	__be16 tag;
	168	u8 deactivated;
	169	u8 disableForceClear;
	170	u8 physicalPresence;
	171	u8 physicalPresenceLock;
	172	u8 bGlobalLock;
	173	}__attribute__((packed));
	174
	175	struct tpm_version_t {
	176	u8 Major;
	177	u8 Minor;
	178	u8 revMajor;
	179	u8 revMinor;
	180	}__attribute__((packed));
	181
	182	struct tpm_version_1_2_t {
	183	__be16 tag;
	184	u8 Major;
	185	u8 Minor;
	186	u8 revMajor;
	187	u8 revMinor;
	188	}__attribute__((packed));
	189
	190	struct timeout_t {
	191	__be32 a;
	192	__be32 b;
	193	__be32 c;
	194	__be32 d;
	195	}__attribute__((packed));
	196
	197	struct duration_t {
	198	__be32 tpm_short;
	199	__be32 tpm_medium;
	200	__be32 tpm_long;
	201	}__attribute__((packed));
	202
	203	struct permanent_flags_t {
	204	__be16 tag;
	205	u8 disable;
	206	u8 ownership;
	207	u8 deactivated;
	208	u8 readPubek;
	209	u8 disableOwnerClear;
	210	u8 allowMaintenance;
	211	u8 physicalPresenceLifetimeLock;
	212	u8 physicalPresenceHWEnable;
	213	u8 physicalPresenceCMDEnable;
	214	u8 CEKPUsed;
	215	u8 TPMpost;
	216	u8 TPMpostLock;
	217	u8 FIPS;
218	u8 operator;
219	u8 enableRevokeEK;
220	u8 nvLocked;
221	u8 readSRKPub;
222	u8 tpmEstablished;
223	u8 maintenanceDone;
224	u8 disableFullDALogicInfo;
225	}__attribute__((packed));
226
227	typedef union {
228	struct permanent_flags_t perm_flags;
229	struct stclear_flags_t stclear_flags;
230	bool owned;
231	__be32 num_pcrs;
232	struct tpm_version_t tpm_version;
233	struct tpm_version_1_2_t tpm_version_1_2;
234	__be32 manufacturer_id;
235	struct timeout_t timeout;
236	struct duration_t duration;
237	} cap_t;
238
239	struct tpm_getcap_params_in {
240	__be32 cap;
241	__be32 subcap_size;
242	__be32 subcap;
243	}__attribute__((packed));
244
245	struct tpm_getcap_params_out {
246	__be32 cap_size;
247	cap_t cap;
248	}__attribute__((packed));
249
250	struct tpm_readpubek_params_out {
251	u8 algorithm[4];
252	u8 encscheme[2];
253	u8 sigscheme[2];
02a077c5	254	__be32 paramsize;
08837438 RA	255	u8 parameters[12]; /assuming RSA/
	256	__be32 keysize;
	257	u8 modulus[256];
	258	u8 checksum[20];
	259	}__attribute__((packed));
	260
	261	typedef union {
	262	struct tpm_input_header in;
	263	struct tpm_output_header out;
	264	} tpm_cmd_header;
	265
659aaf2b RA	266	#define TPM_DIGEST_SIZE 20
	267	struct tpm_pcrread_out {
	268	u8 pcr_result[TPM_DIGEST_SIZE];
	269	}__attribute__((packed));
	270
	271	struct tpm_pcrread_in {
	272	__be32 pcr_idx;
	273	}__attribute__((packed));
	274
	275	struct tpm_pcrextend_in {
	276	__be32 pcr_idx;
	277	u8 hash[TPM_DIGEST_SIZE];
	278	}__attribute__((packed));
	279
41ab999c KY	280	/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
	281	* bytes, but 128 is still a relatively large number of random bytes and
	282	* anything much bigger causes users of struct tpm_cmd_t to start getting
	283	* compiler warnings about stack frame size. */
	284	#define TPM_MAX_RNG_DATA 128
	285
	286	struct tpm_getrandom_out {
	287	__be32 rng_data_len;
	288	u8 rng_data[TPM_MAX_RNG_DATA];
	289	}__attribute__((packed));
	290
	291	struct tpm_getrandom_in {
	292	__be32 num_bytes;
	293	}__attribute__((packed));
	294
c584af19 JG	295	struct tpm_startup_in {
	296	__be16 startup_type;
	297	} __packed;
	298
08837438 RA	299	typedef union {
	300	struct tpm_getcap_params_out getcap_out;
	301	struct tpm_readpubek_params_out readpubek_out;
	302	u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
	303	struct tpm_getcap_params_in getcap_in;
659aaf2b RA	304	struct tpm_pcrread_in pcrread_in;
	305	struct tpm_pcrread_out pcrread_out;
	306	struct tpm_pcrextend_in pcrextend_in;
41ab999c KY	307	struct tpm_getrandom_in getrandom_in;
41ab999c KY	308	struct tpm_getrandom_out getrandom_out;
c584af19	309	struct tpm_startup_in startup_in;
08837438 RA	310	} tpm_cmd_params;
	311
	312	struct tpm_cmd_t {
	313	tpm_cmd_header header;
	314	tpm_cmd_params params;
	315	}__attribute__((packed));
	316
	317	ssize_t tpm_getcap(struct device , __be32, cap_t , const char *);
1da177e4	318
2b30a90f	319	extern int tpm_get_timeouts(struct tpm_chip *);
08e96e48	320	extern void tpm_gen_interrupt(struct tpm_chip *);
68d6e671	321	extern int tpm_do_selftest(struct tpm_chip *);
9e18ee19	322	extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
e0dd03ca KJH	323	extern struct tpm_chip* tpm_register_hardware(struct device *,
e0dd03ca KJH	324	const struct tpm_vendor_specific *);
1da177e4 LT	325	extern int tpm_open(struct inode , struct file );
1da177e4 LT	326	extern int tpm_release(struct inode , struct file );
253115b7	327	extern void tpm_dev_vendor_release(struct tpm_chip *);
1da177e4 LT	328	extern ssize_t tpm_write(struct file , const char __user , size_t,
	329	loff_t *);
	330	extern ssize_t tpm_read(struct file , char __user , size_t, loff_t *);
e659a3fe	331	extern void tpm_remove_hardware(struct device *);
035e2ce8	332	extern int tpm_pm_suspend(struct device *);
ce2c87d4	333	extern int tpm_pm_resume(struct device *);
fd048866 RA	334	extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
fd048866 RA	335	wait_queue_head_t *);
f84fdff0 XZ	336
f84fdff0 XZ	337	#ifdef CONFIG_ACPI
1631cfb7 GW	338	extern int tpm_add_ppi(struct kobject *);
1631cfb7 GW	339	extern void tpm_remove_ppi(struct kobject *);
f84fdff0	340	#else
1631cfb7	341	static inline int tpm_add_ppi(struct kobject *parent)
f84fdff0 XZ	342	{
	343	return 0;
	344	}
1631cfb7 GW	345
	346	static inline void tpm_remove_ppi(struct kobject *parent)
	347	{
	348	}
f84fdff0	349	#endif