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/delay.h>
24 #include <linux/mutex.h>
25 #include <linux/sched.h>
26 #include <linux/miscdevice.h>
27 #include <linux/platform_device.h>
29 #include <linux/tpm.h>
32 TPM_TIMEOUT = 5, /* msecs */
37 TPM_SUPERIO_ADDR = 0x2E,
41 extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
43 extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
45 extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
47 extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
49 extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
50 const char *, size_t);
51 extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
53 extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
55 extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
57 extern ssize_t tpm_show_temp_deactivated(struct device *,
58 struct device_attribute *attr, char *);
62 struct tpm_vendor_specific {
63 const u8 req_complete_mask;
64 const u8 req_complete_val;
65 const u8 req_canceled;
66 void __iomem *iobase; /* ioremapped address */
67 unsigned long base; /* TPM base address */
74 int (*recv) (struct tpm_chip *, u8 *, size_t);
75 int (*send) (struct tpm_chip *, u8 *, size_t);
76 void (*cancel) (struct tpm_chip *);
77 u8 (*status) (struct tpm_chip *);
78 void (*release) (struct device *);
79 struct miscdevice miscdev;
80 struct attribute_group *attr_group;
81 struct list_head list;
83 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
84 unsigned long duration[3]; /* jiffies */
86 wait_queue_head_t read_queue;
87 wait_queue_head_t int_queue;
91 struct device *dev; /* Device stuff */
93 int dev_num; /* /dev/tpm# */
94 unsigned long is_open; /* only one allowed */
97 /* Data passed to and from the tpm via the read/write calls */
99 atomic_t data_pending;
100 struct mutex buffer_mutex;
102 struct timer_list user_read_timer; /* user needs to claim result */
103 struct work_struct work;
104 struct mutex tpm_mutex; /* tpm is processing */
106 struct tpm_vendor_specific vendor;
108 struct dentry **bios_dir;
110 struct list_head list;
111 void (*release) (struct device *);
114 #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
116 static inline void tpm_chip_put(struct tpm_chip *chip)
118 module_put(chip->dev->driver->owner);
121 static inline int tpm_read_index(int base, int index)
124 return inb(base+1) & 0xFF;
127 static inline void tpm_write_index(int base, int index, int value)
130 outb(value & 0xFF, base+1);
132 struct tpm_input_header {
136 }__attribute__((packed));
138 struct tpm_output_header {
142 }__attribute__((packed));
144 struct stclear_flags_t {
147 u8 disableForceClear;
149 u8 physicalPresenceLock;
151 }__attribute__((packed));
153 struct tpm_version_t {
158 }__attribute__((packed));
160 struct tpm_version_1_2_t {
166 }__attribute__((packed));
173 }__attribute__((packed));
179 }__attribute__((packed));
181 struct permanent_flags_t {
187 u8 disableOwnerClear;
189 u8 physicalPresenceLifetimeLock;
190 u8 physicalPresenceHWEnable;
191 u8 physicalPresenceCMDEnable;
202 u8 disableFullDALogicInfo;
203 }__attribute__((packed));
206 struct permanent_flags_t perm_flags;
207 struct stclear_flags_t stclear_flags;
210 struct tpm_version_t tpm_version;
211 struct tpm_version_1_2_t tpm_version_1_2;
212 __be32 manufacturer_id;
213 struct timeout_t timeout;
214 struct duration_t duration;
217 struct tpm_getcap_params_in {
221 }__attribute__((packed));
223 struct tpm_getcap_params_out {
226 }__attribute__((packed));
228 struct tpm_readpubek_params_out {
233 u8 parameters[12]; /*assuming RSA*/
237 }__attribute__((packed));
240 struct tpm_input_header in;
241 struct tpm_output_header out;
244 #define TPM_DIGEST_SIZE 20
245 struct tpm_pcrread_out {
246 u8 pcr_result[TPM_DIGEST_SIZE];
247 }__attribute__((packed));
249 struct tpm_pcrread_in {
251 }__attribute__((packed));
253 struct tpm_pcrextend_in {
255 u8 hash[TPM_DIGEST_SIZE];
256 }__attribute__((packed));
259 struct tpm_getcap_params_out getcap_out;
260 struct tpm_readpubek_params_out readpubek_out;
261 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
262 struct tpm_getcap_params_in getcap_in;
263 struct tpm_pcrread_in pcrread_in;
264 struct tpm_pcrread_out pcrread_out;
265 struct tpm_pcrextend_in pcrextend_in;
269 tpm_cmd_header header;
270 tpm_cmd_params params;
271 }__attribute__((packed));
273 ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
275 extern void tpm_get_timeouts(struct tpm_chip *);
276 extern void tpm_gen_interrupt(struct tpm_chip *);
277 extern void tpm_continue_selftest(struct tpm_chip *);
278 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
279 extern struct tpm_chip* tpm_register_hardware(struct device *,
280 const struct tpm_vendor_specific *);
281 extern int tpm_open(struct inode *, struct file *);
282 extern int tpm_release(struct inode *, struct file *);
283 extern void tpm_dev_vendor_release(struct tpm_chip *);
284 extern ssize_t tpm_write(struct file *, const char __user *, size_t,
286 extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
287 extern void tpm_remove_hardware(struct device *);
288 extern int tpm_pm_suspend(struct device *, pm_message_t);
289 extern int tpm_pm_resume(struct device *);
292 extern struct dentry ** tpm_bios_log_setup(char *);
293 extern void tpm_bios_log_teardown(struct dentry **);
295 static inline struct dentry ** tpm_bios_log_setup(char *name)
299 static inline void tpm_bios_log_teardown(struct dentry **dir)