Commit | Line | Data |
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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> |
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> |
1da177e4 | 29 | |
3122a88a KH |
30 | enum tpm_timeout { |
31 | TPM_TIMEOUT = 5, /* msecs */ | |
32 | }; | |
1da177e4 LT |
33 | |
34 | /* TPM addresses */ | |
3122a88a | 35 | enum tpm_addr { |
daacdfa6 | 36 | TPM_SUPERIO_ADDR = 0x2E, |
3122a88a | 37 | TPM_ADDR = 0x4E, |
3122a88a KH |
38 | }; |
39 | ||
6659ca2a KH |
40 | extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, |
41 | char *); | |
42 | extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, | |
43 | char *); | |
44 | extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, | |
45 | char *); | |
08e96e48 KJH |
46 | extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr, |
47 | char *); | |
6659ca2a KH |
48 | extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, |
49 | const char *, size_t); | |
08e96e48 KJH |
50 | extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr, |
51 | char *); | |
52 | extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr, | |
53 | char *); | |
54 | extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr, | |
55 | char *); | |
56 | extern ssize_t tpm_show_temp_deactivated(struct device *, | |
57 | struct device_attribute *attr, char *); | |
1da177e4 LT |
58 | |
59 | struct tpm_chip; | |
60 | ||
61 | struct tpm_vendor_specific { | |
e0dd03ca KJH |
62 | const u8 req_complete_mask; |
63 | const u8 req_complete_val; | |
64 | const u8 req_canceled; | |
ad5ea3cc KJH |
65 | void __iomem *iobase; /* ioremapped address */ |
66 | unsigned long base; /* TPM base address */ | |
67 | ||
27084efe LD |
68 | int irq; |
69 | ||
ad5ea3cc KJH |
70 | int region_size; |
71 | int have_region; | |
1da177e4 LT |
72 | |
73 | int (*recv) (struct tpm_chip *, u8 *, size_t); | |
74 | int (*send) (struct tpm_chip *, u8 *, size_t); | |
75 | void (*cancel) (struct tpm_chip *); | |
b4ed3e3c | 76 | u8 (*status) (struct tpm_chip *); |
5bd91f18 | 77 | void (*release) (struct device *); |
1da177e4 | 78 | struct miscdevice miscdev; |
6659ca2a | 79 | struct attribute_group *attr_group; |
27084efe LD |
80 | struct list_head list; |
81 | int locality; | |
36b20020 KJH |
82 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
83 | unsigned long duration[3]; /* jiffies */ | |
27084efe LD |
84 | |
85 | wait_queue_head_t read_queue; | |
86 | wait_queue_head_t int_queue; | |
1da177e4 LT |
87 | }; |
88 | ||
89 | struct tpm_chip { | |
e659a3fe | 90 | struct device *dev; /* Device stuff */ |
1da177e4 LT |
91 | |
92 | int dev_num; /* /dev/tpm# */ | |
93 | int num_opens; /* only one allowed */ | |
94 | int time_expired; | |
95 | ||
96 | /* Data passed to and from the tpm via the read/write calls */ | |
97 | u8 *data_buffer; | |
98 | atomic_t data_pending; | |
d081d470 | 99 | struct mutex buffer_mutex; |
1da177e4 LT |
100 | |
101 | struct timer_list user_read_timer; /* user needs to claim result */ | |
09e12f9f | 102 | struct work_struct work; |
d081d470 | 103 | struct mutex tpm_mutex; /* tpm is processing */ |
1da177e4 | 104 | |
90dda520 | 105 | struct tpm_vendor_specific vendor; |
1da177e4 | 106 | |
55a82ab3 KJH |
107 | struct dentry **bios_dir; |
108 | ||
1da177e4 | 109 | struct list_head list; |
5bd91f18 | 110 | void (*release) (struct device *); |
1da177e4 LT |
111 | }; |
112 | ||
27084efe LD |
113 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
114 | ||
daacdfa6 | 115 | static inline int tpm_read_index(int base, int index) |
1da177e4 | 116 | { |
daacdfa6 KJH |
117 | outb(index, base); |
118 | return inb(base+1) & 0xFF; | |
1da177e4 LT |
119 | } |
120 | ||
daacdfa6 | 121 | static inline void tpm_write_index(int base, int index, int value) |
1da177e4 | 122 | { |
daacdfa6 KJH |
123 | outb(index, base); |
124 | outb(value & 0xFF, base+1); | |
1da177e4 LT |
125 | } |
126 | ||
08e96e48 KJH |
127 | extern void tpm_get_timeouts(struct tpm_chip *); |
128 | extern void tpm_gen_interrupt(struct tpm_chip *); | |
129 | extern void tpm_continue_selftest(struct tpm_chip *); | |
9e18ee19 | 130 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
e0dd03ca KJH |
131 | extern struct tpm_chip* tpm_register_hardware(struct device *, |
132 | const struct tpm_vendor_specific *); | |
1da177e4 LT |
133 | extern int tpm_open(struct inode *, struct file *); |
134 | extern int tpm_release(struct inode *, struct file *); | |
135 | extern ssize_t tpm_write(struct file *, const char __user *, size_t, | |
136 | loff_t *); | |
137 | extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); | |
e659a3fe | 138 | extern void tpm_remove_hardware(struct device *); |
ce2c87d4 KJH |
139 | extern int tpm_pm_suspend(struct device *, pm_message_t); |
140 | extern int tpm_pm_resume(struct device *); | |
55a82ab3 KJH |
141 | |
142 | #ifdef CONFIG_ACPI | |
143 | extern struct dentry ** tpm_bios_log_setup(char *); | |
144 | extern void tpm_bios_log_teardown(struct dentry **); | |
145 | #else | |
bb53a761 | 146 | static inline struct dentry ** tpm_bios_log_setup(char *name) |
55a82ab3 KJH |
147 | { |
148 | return NULL; | |
149 | } | |
150 | static inline void tpm_bios_log_teardown(struct dentry **dir) | |
151 | { | |
152 | } | |
153 | #endif |