1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* 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>
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_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 *);
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 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 list_head list;
int locality;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
unsigned long duration[3]; /* jiffies */
wait_queue_head_t read_queue;
wait_queue_head_t int_queue;
};
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 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;
};
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
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 void tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern void tpm_continue_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 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 *);
#ifdef CONFIG_ACPI
extern struct dentry ** tpm_bios_log_setup(char *);
extern void tpm_bios_log_teardown(struct dentry **);
#else
static inline struct dentry ** tpm_bios_log_setup(char *name)
{
return NULL;
}
static inline void tpm_bios_log_teardown(struct dentry **dir)
{
}
#endif
|
