[GitHub/mt8127/android_kernel_alcatel_ttab.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/version.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/miscdevice.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;
	u16 base;		/* TPM base address */

	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 pci_dev *pci_dev;	/* PCI 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 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 pci_dev *,
				 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 __devexit tpm_remove(struct pci_dev *);
extern int tpm_pm_suspend(struct pci_dev *, pm_message_t);
extern int tpm_pm_resume(struct pci_dev *);
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	*
	10	* Maintained by: <tpmdd_devel@lists.sourceforge.net>
	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>
	22	#include <linux/version.h>
	23	#include <linux/pci.h>
	24	#include <linux/delay.h>
	25	#include <linux/fs.h>
	26	#include <linux/miscdevice.h>
	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;
1da177e4 LT	53	u16 base; /* TPM base address */
	54
	55	int (recv) (struct tpm_chip , u8 *, size_t);
	56	int (send) (struct tpm_chip , u8 *, size_t);
	57	void (cancel) (struct tpm_chip );
b4ed3e3c	58	u8 (status) (struct tpm_chip );
1da177e4	59	struct miscdevice miscdev;
6659ca2a	60	struct attribute_group *attr_group;
1da177e4 LT	61	};
	62
	63	struct tpm_chip {
	64	struct pci_dev pci_dev; / PCI device stuff */
	65
	66	int dev_num; /* /dev/tpm# */
	67	int num_opens; /* only one allowed */
	68	int time_expired;
	69
	70	/* Data passed to and from the tpm via the read/write calls */
	71	u8 *data_buffer;
	72	atomic_t data_pending;
	73	struct semaphore buffer_mutex;
	74
	75	struct timer_list user_read_timer; /* user needs to claim result */
	76	struct semaphore tpm_mutex; /* tpm is processing */
1da177e4 LT	77
	78	struct tpm_vendor_specific *vendor;
	79
	80	struct list_head list;
	81	};
	82
daacdfa6	83	static inline int tpm_read_index(int base, int index)
1da177e4	84	{
daacdfa6 KJH	85	outb(index, base);
daacdfa6 KJH	86	return inb(base+1) & 0xFF;
1da177e4 LT	87	}
1da177e4 LT	88
daacdfa6	89	static inline void tpm_write_index(int base, int index, int value)
1da177e4	90	{
daacdfa6 KJH	91	outb(index, base);
daacdfa6 KJH	92	outb(value & 0xFF, base+1);
1da177e4 LT	93	}
1da177e4 LT	94
1da177e4 LT	95	extern int tpm_register_hardware(struct pci_dev *,
	96	struct tpm_vendor_specific *);
	97	extern int tpm_open(struct inode , struct file );
	98	extern int tpm_release(struct inode , struct file );
	99	extern ssize_t tpm_write(struct file , const char __user , size_t,
	100	loff_t *);
	101	extern ssize_t tpm_read(struct file , char __user , size_t, loff_t *);
	102	extern void __devexit tpm_remove(struct pci_dev *);
4fd416c1	103	extern int tpm_pm_suspend(struct pci_dev *, pm_message_t);
1da177e4	104	extern int tpm_pm_resume(struct pci_dev *);