[linux.git] / drivers / char / tpm / tpm.h

/*
 * Copyright (C) 2004 IBM Corporation
 *
 * Authors:
 * Leendert van Doorn <[email protected]>
 * Dave Safford <[email protected]>
 * Reiner Sailer <[email protected]>
 * Kylene Hall <[email protected]>
 *
 * Maintained by: <[email protected]>
 *
 * 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/pci.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/platform_device.h>

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

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

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_store_cancel(struct device *, struct device_attribute *attr,
				const char *, size_t);

struct tpm_chip;

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

	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 *);
	struct miscdevice miscdev;
	struct attribute_group *attr_group;
};

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

	int dev_num;		/* /dev/tpm# */
	int num_opens;		/* 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 semaphore buffer_mutex;

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

	struct tpm_vendor_specific *vendor;

	struct list_head list;
};

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);
}

extern int tpm_register_hardware(struct device *,
				 struct tpm_vendor_specific *);
extern int tpm_open(struct inode *, struct file *);
extern int tpm_release(struct inode *, struct file *);
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 *, pm_message_t);
extern int tpm_pm_resume(struct device *);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2004 IBM Corporation
	3	*
	4	* Authors:
	5	* Leendert van Doorn <[email protected]>
	6	* Dave Safford <[email protected]>
	7	* Reiner Sailer <[email protected]>
	8	* Kylene Hall <[email protected]>
	9	*
	10	* Maintained by: <[email protected]>
	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/pci.h>
	23	#include <linux/delay.h>
	24	#include <linux/fs.h>
	25	#include <linux/miscdevice.h>
bbc5b212	26	#include <linux/platform_device.h>
1da177e4	27
3122a88a KH	28	enum tpm_timeout {
	29	TPM_TIMEOUT = 5, /* msecs */
	30	};
1da177e4 LT	31
1da177e4 LT	32	/* TPM addresses */
3122a88a	33	enum tpm_addr {
daacdfa6	34	TPM_SUPERIO_ADDR = 0x2E,
3122a88a	35	TPM_ADDR = 0x4E,
3122a88a KH	36	};
3122a88a KH	37
6659ca2a KH	38	extern ssize_t tpm_show_pubek(struct device , struct device_attribute attr,
	39	char *);
	40	extern ssize_t tpm_show_pcrs(struct device , struct device_attribute attr,
	41	char *);
	42	extern ssize_t tpm_show_caps(struct device , struct device_attribute attr,
	43	char *);
	44	extern ssize_t tpm_store_cancel(struct device , struct device_attribute attr,
	45	const char *, size_t);
1da177e4 LT	46
	47	struct tpm_chip;
	48
	49	struct tpm_vendor_specific {
	50	u8 req_complete_mask;
	51	u8 req_complete_val;
d9e5b6bf	52	u8 req_canceled;
ad5ea3cc KJH	53	void __iomem iobase; / ioremapped address */
	54	unsigned long base; /* TPM base address */
	55
	56	int region_size;
	57	int have_region;
1da177e4 LT	58
	59	int (recv) (struct tpm_chip , u8 *, size_t);
	60	int (send) (struct tpm_chip , u8 *, size_t);
	61	void (cancel) (struct tpm_chip );
b4ed3e3c	62	u8 (status) (struct tpm_chip );
1da177e4	63	struct miscdevice miscdev;
6659ca2a	64	struct attribute_group *attr_group;
1da177e4 LT	65	};
	66
	67	struct tpm_chip {
e659a3fe	68	struct device dev; / Device stuff */
1da177e4 LT	69
	70	int dev_num; /* /dev/tpm# */
	71	int num_opens; /* only one allowed */
	72	int time_expired;
	73
	74	/* Data passed to and from the tpm via the read/write calls */
	75	u8 *data_buffer;
	76	atomic_t data_pending;
	77	struct semaphore buffer_mutex;
	78
	79	struct timer_list user_read_timer; /* user needs to claim result */
09e12f9f	80	struct work_struct work;
1da177e4	81	struct semaphore tpm_mutex; /* tpm is processing */
1da177e4 LT	82
	83	struct tpm_vendor_specific *vendor;
	84
	85	struct list_head list;
	86	};
	87
daacdfa6	88	static inline int tpm_read_index(int base, int index)
1da177e4	89	{
daacdfa6 KJH	90	outb(index, base);
daacdfa6 KJH	91	return inb(base+1) & 0xFF;
1da177e4 LT	92	}
1da177e4 LT	93
daacdfa6	94	static inline void tpm_write_index(int base, int index, int value)
1da177e4	95	{
daacdfa6 KJH	96	outb(index, base);
daacdfa6 KJH	97	outb(value & 0xFF, base+1);
1da177e4 LT	98	}
1da177e4 LT	99
e659a3fe	100	extern int tpm_register_hardware(struct device *,
1da177e4 LT	101	struct tpm_vendor_specific *);
	102	extern int tpm_open(struct inode , struct file );
	103	extern int tpm_release(struct inode , struct file );
	104	extern ssize_t tpm_write(struct file , const char __user , size_t,
	105	loff_t *);
	106	extern ssize_t tpm_read(struct file , char __user , size_t, loff_t *);
e659a3fe	107	extern void tpm_remove_hardware(struct device *);
ce2c87d4 KJH	108	extern int tpm_pm_suspend(struct device *, pm_message_t);
ce2c87d4 KJH	109	extern int tpm_pm_resume(struct device *);