2 * Copyright (C) 2004 IBM Corporation
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>
10 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
12 * Device driver for TCG/TCPA TPM (trusted platform module).
13 * Specifications at www.trustedcomputinggroup.org
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
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/delay.h>
25 #include <linux/miscdevice.h>
26 #include <linux/platform_device.h>
30 TPM_TIMEOUT
= 5, /* msecs */
35 TPM_SUPERIO_ADDR
= 0x2E,
39 extern ssize_t
tpm_show_pubek(struct device
*, struct device_attribute
*attr
,
41 extern ssize_t
tpm_show_pcrs(struct device
*, struct device_attribute
*attr
,
43 extern ssize_t
tpm_show_caps(struct device
*, struct device_attribute
*attr
,
45 extern ssize_t
tpm_store_cancel(struct device
*, struct device_attribute
*attr
,
46 const char *, size_t);
50 struct tpm_vendor_specific
{
54 void __iomem
*iobase
; /* ioremapped address */
55 unsigned long base
; /* TPM base address */
60 int (*recv
) (struct tpm_chip
*, u8
*, size_t);
61 int (*send
) (struct tpm_chip
*, u8
*, size_t);
62 void (*cancel
) (struct tpm_chip
*);
63 u8 (*status
) (struct tpm_chip
*);
64 struct miscdevice miscdev
;
65 struct attribute_group
*attr_group
;
69 struct device
*dev
; /* Device stuff */
71 int dev_num
; /* /dev/tpm# */
72 int num_opens
; /* only one allowed */
75 /* Data passed to and from the tpm via the read/write calls */
77 atomic_t data_pending
;
78 struct semaphore buffer_mutex
;
80 struct timer_list user_read_timer
; /* user needs to claim result */
81 struct work_struct work
;
82 struct semaphore tpm_mutex
; /* tpm is processing */
84 struct tpm_vendor_specific
*vendor
;
86 struct dentry
**bios_dir
;
88 struct list_head list
;
91 static inline int tpm_read_index(int base
, int index
)
94 return inb(base
+1) & 0xFF;
97 static inline void tpm_write_index(int base
, int index
, int value
)
100 outb(value
& 0xFF, base
+1);
103 extern int tpm_register_hardware(struct device
*,
104 struct tpm_vendor_specific
*);
105 extern int tpm_open(struct inode
*, struct file
*);
106 extern int tpm_release(struct inode
*, struct file
*);
107 extern ssize_t
tpm_write(struct file
*, const char __user
*, size_t,
109 extern ssize_t
tpm_read(struct file
*, char __user
*, size_t, loff_t
*);
110 extern void tpm_remove_hardware(struct device
*);
111 extern int tpm_pm_suspend(struct device
*, pm_message_t
);
112 extern int tpm_pm_resume(struct device
*);
115 extern struct dentry
** tpm_bios_log_setup(char *);
116 extern void tpm_bios_log_teardown(struct dentry
**);
118 static inline struct dentry
* tpm_bios_log_setup(char *name
)
122 static inline void tpm_bios_log_teardown(struct dentry
**dir
)