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21#include <linux/module.h>
22#include <linux/delay.h>
23#include <linux/fs.h>
24#include <linux/mutex.h>
25#include <linux/sched.h>
26#include <linux/miscdevice.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <linux/tpm.h>
30
31enum tpm_timeout {
32 TPM_TIMEOUT = 5,
33};
34
35
36enum tpm_addr {
37 TPM_SUPERIO_ADDR = 0x2E,
38 TPM_ADDR = 0x4E,
39};
40
41extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
42 char *);
43extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
44 char *);
45extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
46 char *);
47extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
48 char *);
49extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
50 const char *, size_t);
51extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
52 char *);
53extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
54 char *);
55extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
56 char *);
57extern ssize_t tpm_show_temp_deactivated(struct device *,
58 struct device_attribute *attr, char *);
59extern ssize_t tpm_show_durations(struct device *,
60 struct device_attribute *attr, char *);
61extern ssize_t tpm_show_timeouts(struct device *,
62 struct device_attribute *attr, char *);
63
64struct tpm_chip;
65
66struct tpm_vendor_specific {
67 const u8 req_complete_mask;
68 const u8 req_complete_val;
69 const u8 req_canceled;
70 void __iomem *iobase;
71 unsigned long base;
72
73 int irq;
74 int probed_irq;
75
76 int region_size;
77 int have_region;
78
79 int (*recv) (struct tpm_chip *, u8 *, size_t);
80 int (*send) (struct tpm_chip *, u8 *, size_t);
81 void (*cancel) (struct tpm_chip *);
82 u8 (*status) (struct tpm_chip *);
83 void (*release) (struct device *);
84 struct miscdevice miscdev;
85 struct attribute_group *attr_group;
86 struct list_head list;
87 int locality;
88 unsigned long timeout_a, timeout_b, timeout_c, timeout_d;
89 bool timeout_adjusted;
90 unsigned long duration[3];
91 bool duration_adjusted;
92
93 wait_queue_head_t read_queue;
94 wait_queue_head_t int_queue;
95};
96
97struct tpm_chip {
98 struct device *dev;
99
100 int dev_num;
101 unsigned long is_open;
102 int time_expired;
103
104
105 u8 *data_buffer;
106 atomic_t data_pending;
107 struct mutex buffer_mutex;
108
109 struct timer_list user_read_timer;
110 struct work_struct work;
111 struct mutex tpm_mutex;
112
113 struct tpm_vendor_specific vendor;
114
115 struct dentry **bios_dir;
116
117 struct list_head list;
118 void (*release) (struct device *);
119};
120
121#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
122
123static inline void tpm_chip_put(struct tpm_chip *chip)
124{
125 module_put(chip->dev->driver->owner);
126}
127
128static inline int tpm_read_index(int base, int index)
129{
130 outb(index, base);
131 return inb(base+1) & 0xFF;
132}
133
134static inline void tpm_write_index(int base, int index, int value)
135{
136 outb(index, base);
137 outb(value & 0xFF, base+1);
138}
139struct tpm_input_header {
140 __be16 tag;
141 __be32 length;
142 __be32 ordinal;
143}__attribute__((packed));
144
145struct tpm_output_header {
146 __be16 tag;
147 __be32 length;
148 __be32 return_code;
149}__attribute__((packed));
150
151struct stclear_flags_t {
152 __be16 tag;
153 u8 deactivated;
154 u8 disableForceClear;
155 u8 physicalPresence;
156 u8 physicalPresenceLock;
157 u8 bGlobalLock;
158}__attribute__((packed));
159
160struct tpm_version_t {
161 u8 Major;
162 u8 Minor;
163 u8 revMajor;
164 u8 revMinor;
165}__attribute__((packed));
166
167struct tpm_version_1_2_t {
168 __be16 tag;
169 u8 Major;
170 u8 Minor;
171 u8 revMajor;
172 u8 revMinor;
173}__attribute__((packed));
174
175struct timeout_t {
176 __be32 a;
177 __be32 b;
178 __be32 c;
179 __be32 d;
180}__attribute__((packed));
181
182struct duration_t {
183 __be32 tpm_short;
184 __be32 tpm_medium;
185 __be32 tpm_long;
186}__attribute__((packed));
187
188struct permanent_flags_t {
189 __be16 tag;
190 u8 disable;
191 u8 ownership;
192 u8 deactivated;
193 u8 readPubek;
194 u8 disableOwnerClear;
195 u8 allowMaintenance;
196 u8 physicalPresenceLifetimeLock;
197 u8 physicalPresenceHWEnable;
198 u8 physicalPresenceCMDEnable;
199 u8 CEKPUsed;
200 u8 TPMpost;
201 u8 TPMpostLock;
202 u8 FIPS;
203 u8 operator;
204 u8 enableRevokeEK;
205 u8 nvLocked;
206 u8 readSRKPub;
207 u8 tpmEstablished;
208 u8 maintenanceDone;
209 u8 disableFullDALogicInfo;
210}__attribute__((packed));
211
212typedef union {
213 struct permanent_flags_t perm_flags;
214 struct stclear_flags_t stclear_flags;
215 bool owned;
216 __be32 num_pcrs;
217 struct tpm_version_t tpm_version;
218 struct tpm_version_1_2_t tpm_version_1_2;
219 __be32 manufacturer_id;
220 struct timeout_t timeout;
221 struct duration_t duration;
222} cap_t;
223
224struct tpm_getcap_params_in {
225 __be32 cap;
226 __be32 subcap_size;
227 __be32 subcap;
228}__attribute__((packed));
229
230struct tpm_getcap_params_out {
231 __be32 cap_size;
232 cap_t cap;
233}__attribute__((packed));
234
235struct tpm_readpubek_params_out {
236 u8 algorithm[4];
237 u8 encscheme[2];
238 u8 sigscheme[2];
239 __be32 paramsize;
240 u8 parameters[12];
241 __be32 keysize;
242 u8 modulus[256];
243 u8 checksum[20];
244}__attribute__((packed));
245
246typedef union {
247 struct tpm_input_header in;
248 struct tpm_output_header out;
249} tpm_cmd_header;
250
251#define TPM_DIGEST_SIZE 20
252struct tpm_pcrread_out {
253 u8 pcr_result[TPM_DIGEST_SIZE];
254}__attribute__((packed));
255
256struct tpm_pcrread_in {
257 __be32 pcr_idx;
258}__attribute__((packed));
259
260struct tpm_pcrextend_in {
261 __be32 pcr_idx;
262 u8 hash[TPM_DIGEST_SIZE];
263}__attribute__((packed));
264
265typedef union {
266 struct tpm_getcap_params_out getcap_out;
267 struct tpm_readpubek_params_out readpubek_out;
268 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
269 struct tpm_getcap_params_in getcap_in;
270 struct tpm_pcrread_in pcrread_in;
271 struct tpm_pcrread_out pcrread_out;
272 struct tpm_pcrextend_in pcrextend_in;
273} tpm_cmd_params;
274
275struct tpm_cmd_t {
276 tpm_cmd_header header;
277 tpm_cmd_params params;
278}__attribute__((packed));
279
280ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
281
282extern void tpm_get_timeouts(struct tpm_chip *);
283extern void tpm_gen_interrupt(struct tpm_chip *);
284extern void tpm_continue_selftest(struct tpm_chip *);
285extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
286extern struct tpm_chip* tpm_register_hardware(struct device *,
287 const struct tpm_vendor_specific *);
288extern int tpm_open(struct inode *, struct file *);
289extern int tpm_release(struct inode *, struct file *);
290extern void tpm_dev_vendor_release(struct tpm_chip *);
291extern ssize_t tpm_write(struct file *, const char __user *, size_t,
292 loff_t *);
293extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
294extern void tpm_remove_hardware(struct device *);
295extern int tpm_pm_suspend(struct device *, pm_message_t);
296extern int tpm_pm_resume(struct device *);
297
298#ifdef CONFIG_ACPI
299extern struct dentry ** tpm_bios_log_setup(char *);
300extern void tpm_bios_log_teardown(struct dentry **);
301#else
302static inline struct dentry ** tpm_bios_log_setup(char *name)
303{
304 return NULL;
305}
306static inline void tpm_bios_log_teardown(struct dentry **dir)
307{
308}
309#endif
310
