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 *);
59 extern ssize_t tpm_show_timeouts(struct device *,
60 struct device_attribute *attr, char *);
64 struct tpm_vendor_specific {
65 const u8 req_complete_mask;
66 const u8 req_complete_val;
67 const u8 req_canceled;
68 void __iomem *iobase; /* ioremapped address */
69 unsigned long base; /* TPM base address */
76 int (*recv) (struct tpm_chip *, u8 *, size_t);
77 int (*send) (struct tpm_chip *, u8 *, size_t);
78 void (*cancel) (struct tpm_chip *);
79 u8 (*status) (struct tpm_chip *);
80 void (*release) (struct device *);
81 struct miscdevice miscdev;
82 struct attribute_group *attr_group;
83 struct list_head list;
85 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
86 unsigned long duration[3]; /* jiffies */
88 wait_queue_head_t read_queue;
89 wait_queue_head_t int_queue;
93 struct device *dev; /* Device stuff */
95 int dev_num; /* /dev/tpm# */
96 unsigned long is_open; /* only one allowed */
99 /* Data passed to and from the tpm via the read/write calls */
101 atomic_t data_pending;
102 struct mutex buffer_mutex;
104 struct timer_list user_read_timer; /* user needs to claim result */
105 struct work_struct work;
106 struct mutex tpm_mutex; /* tpm is processing */
108 struct tpm_vendor_specific vendor;
110 struct dentry **bios_dir;
112 struct list_head list;
113 void (*release) (struct device *);
116 #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
118 static inline void tpm_chip_put(struct tpm_chip *chip)
120 module_put(chip->dev->driver->owner);
123 static inline int tpm_read_index(int base, int index)
126 return inb(base+1) & 0xFF;
129 static inline void tpm_write_index(int base, int index, int value)
132 outb(value & 0xFF, base+1);
134 struct tpm_input_header {
138 }__attribute__((packed));
140 struct tpm_output_header {
144 }__attribute__((packed));
146 struct stclear_flags_t {
149 u8 disableForceClear;
151 u8 physicalPresenceLock;
153 }__attribute__((packed));
155 struct tpm_version_t {
160 }__attribute__((packed));
162 struct tpm_version_1_2_t {
168 }__attribute__((packed));
175 }__attribute__((packed));
181 }__attribute__((packed));
183 struct permanent_flags_t {
189 u8 disableOwnerClear;
191 u8 physicalPresenceLifetimeLock;
192 u8 physicalPresenceHWEnable;
193 u8 physicalPresenceCMDEnable;
204 u8 disableFullDALogicInfo;
205 }__attribute__((packed));
208 struct permanent_flags_t perm_flags;
209 struct stclear_flags_t stclear_flags;
212 struct tpm_version_t tpm_version;
213 struct tpm_version_1_2_t tpm_version_1_2;
214 __be32 manufacturer_id;
215 struct timeout_t timeout;
216 struct duration_t duration;
219 struct tpm_getcap_params_in {
223 }__attribute__((packed));
225 struct tpm_getcap_params_out {
228 }__attribute__((packed));
230 struct tpm_readpubek_params_out {
235 u8 parameters[12]; /*assuming RSA*/
239 }__attribute__((packed));
242 struct tpm_input_header in;
243 struct tpm_output_header out;
246 #define TPM_DIGEST_SIZE 20
247 struct tpm_pcrread_out {
248 u8 pcr_result[TPM_DIGEST_SIZE];
249 }__attribute__((packed));
251 struct tpm_pcrread_in {
253 }__attribute__((packed));
255 struct tpm_pcrextend_in {
257 u8 hash[TPM_DIGEST_SIZE];
258 }__attribute__((packed));
261 struct tpm_getcap_params_out getcap_out;
262 struct tpm_readpubek_params_out readpubek_out;
263 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
264 struct tpm_getcap_params_in getcap_in;
265 struct tpm_pcrread_in pcrread_in;
266 struct tpm_pcrread_out pcrread_out;
267 struct tpm_pcrextend_in pcrextend_in;
271 tpm_cmd_header header;
272 tpm_cmd_params params;
273 }__attribute__((packed));
275 ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
277 extern void tpm_get_timeouts(struct tpm_chip *);
278 extern void tpm_gen_interrupt(struct tpm_chip *);
279 extern void tpm_continue_selftest(struct tpm_chip *);
280 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
281 extern struct tpm_chip* tpm_register_hardware(struct device *,
282 const struct tpm_vendor_specific *);
283 extern int tpm_open(struct inode *, struct file *);
284 extern int tpm_release(struct inode *, struct file *);
285 extern void tpm_dev_vendor_release(struct tpm_chip *);
286 extern ssize_t tpm_write(struct file *, const char __user *, size_t,
288 extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
289 extern void tpm_remove_hardware(struct device *);
290 extern int tpm_pm_suspend(struct device *, pm_message_t);
291 extern int tpm_pm_resume(struct device *);
294 extern struct dentry ** tpm_bios_log_setup(char *);
295 extern void tpm_bios_log_teardown(struct dentry **);
297 static inline struct dentry ** tpm_bios_log_setup(char *name)
301 static inline void tpm_bios_log_teardown(struct dentry **dir)