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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_const {
32 TPM_MINOR = 224,
33 TPM_BUFSIZE = 4096,
34 TPM_NUM_DEVICES = 256,
35 TPM_RETRY = 50,
36};
37
38enum tpm_timeout {
39 TPM_TIMEOUT = 5,
40 TPM_TIMEOUT_RETRY = 100
41};
42
43
44enum tpm_addr {
45 TPM_SUPERIO_ADDR = 0x2E,
46 TPM_ADDR = 0x4E,
47};
48
49#define TPM_WARN_RETRY 0x800
50#define TPM_WARN_DOING_SELFTEST 0x802
51#define TPM_ERR_DEACTIVATED 0x6
52#define TPM_ERR_DISABLED 0x7
53#define TPM_ERR_INVALID_POSTINIT 38
54
55#define TPM_HEADER_SIZE 10
56extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
57 char *);
58extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
59 char *);
60extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
61 char *);
62extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
63 char *);
64extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
65 const char *, size_t);
66extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
67 char *);
68extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
69 char *);
70extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
71 char *);
72extern ssize_t tpm_show_temp_deactivated(struct device *,
73 struct device_attribute *attr, char *);
74extern ssize_t tpm_show_durations(struct device *,
75 struct device_attribute *attr, char *);
76extern ssize_t tpm_show_timeouts(struct device *,
77 struct device_attribute *attr, char *);
78
79struct tpm_chip;
80
81struct tpm_vendor_specific {
82 const u8 req_complete_mask;
83 const u8 req_complete_val;
84 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
85 void __iomem *iobase;
86 unsigned long base;
87
88 int irq;
89 int probed_irq;
90
91 int region_size;
92 int have_region;
93
94 int (*recv) (struct tpm_chip *, u8 *, size_t);
95 int (*send) (struct tpm_chip *, u8 *, size_t);
96 void (*cancel) (struct tpm_chip *);
97 u8 (*status) (struct tpm_chip *);
98 void (*release) (struct device *);
99 struct miscdevice miscdev;
100 struct attribute_group *attr_group;
101 struct list_head list;
102 int locality;
103 unsigned long timeout_a, timeout_b, timeout_c, timeout_d;
104 bool timeout_adjusted;
105 unsigned long duration[3];
106 bool duration_adjusted;
107 void *priv;
108
109 wait_queue_head_t read_queue;
110 wait_queue_head_t int_queue;
111
112 u16 manufacturer_id;
113};
114
115#define TPM_VPRIV(c) (c)->vendor.priv
116
117#define TPM_VID_INTEL 0x8086
118#define TPM_VID_WINBOND 0x1050
119#define TPM_VID_STM 0x104A
120
121struct tpm_chip {
122 struct device *dev;
123
124 int dev_num;
125 unsigned long is_open;
126 int time_expired;
127
128
129 u8 *data_buffer;
130 atomic_t data_pending;
131 struct mutex buffer_mutex;
132
133 struct timer_list user_read_timer;
134 struct work_struct work;
135 struct mutex tpm_mutex;
136
137 struct tpm_vendor_specific vendor;
138
139 struct dentry **bios_dir;
140
141 struct list_head list;
142 void (*release) (struct device *);
143};
144
145#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
146
147static inline void tpm_chip_put(struct tpm_chip *chip)
148{
149 module_put(chip->dev->driver->owner);
150}
151
152static inline int tpm_read_index(int base, int index)
153{
154 outb(index, base);
155 return inb(base+1) & 0xFF;
156}
157
158static inline void tpm_write_index(int base, int index, int value)
159{
160 outb(index, base);
161 outb(value & 0xFF, base+1);
162}
163struct tpm_input_header {
164 __be16 tag;
165 __be32 length;
166 __be32 ordinal;
167} __packed;
168
169struct tpm_output_header {
170 __be16 tag;
171 __be32 length;
172 __be32 return_code;
173} __packed;
174
175struct stclear_flags_t {
176 __be16 tag;
177 u8 deactivated;
178 u8 disableForceClear;
179 u8 physicalPresence;
180 u8 physicalPresenceLock;
181 u8 bGlobalLock;
182} __packed;
183
184struct tpm_version_t {
185 u8 Major;
186 u8 Minor;
187 u8 revMajor;
188 u8 revMinor;
189} __packed;
190
191struct tpm_version_1_2_t {
192 __be16 tag;
193 u8 Major;
194 u8 Minor;
195 u8 revMajor;
196 u8 revMinor;
197} __packed;
198
199struct timeout_t {
200 __be32 a;
201 __be32 b;
202 __be32 c;
203 __be32 d;
204} __packed;
205
206struct duration_t {
207 __be32 tpm_short;
208 __be32 tpm_medium;
209 __be32 tpm_long;
210} __packed;
211
212struct permanent_flags_t {
213 __be16 tag;
214 u8 disable;
215 u8 ownership;
216 u8 deactivated;
217 u8 readPubek;
218 u8 disableOwnerClear;
219 u8 allowMaintenance;
220 u8 physicalPresenceLifetimeLock;
221 u8 physicalPresenceHWEnable;
222 u8 physicalPresenceCMDEnable;
223 u8 CEKPUsed;
224 u8 TPMpost;
225 u8 TPMpostLock;
226 u8 FIPS;
227 u8 operator;
228 u8 enableRevokeEK;
229 u8 nvLocked;
230 u8 readSRKPub;
231 u8 tpmEstablished;
232 u8 maintenanceDone;
233 u8 disableFullDALogicInfo;
234} __packed;
235
236typedef union {
237 struct permanent_flags_t perm_flags;
238 struct stclear_flags_t stclear_flags;
239 bool owned;
240 __be32 num_pcrs;
241 struct tpm_version_t tpm_version;
242 struct tpm_version_1_2_t tpm_version_1_2;
243 __be32 manufacturer_id;
244 struct timeout_t timeout;
245 struct duration_t duration;
246} cap_t;
247
248struct tpm_getcap_params_in {
249 __be32 cap;
250 __be32 subcap_size;
251 __be32 subcap;
252} __packed;
253
254struct tpm_getcap_params_out {
255 __be32 cap_size;
256 cap_t cap;
257} __packed;
258
259struct tpm_readpubek_params_out {
260 u8 algorithm[4];
261 u8 encscheme[2];
262 u8 sigscheme[2];
263 __be32 paramsize;
264 u8 parameters[12];
265 __be32 keysize;
266 u8 modulus[256];
267 u8 checksum[20];
268} __packed;
269
270typedef union {
271 struct tpm_input_header in;
272 struct tpm_output_header out;
273} tpm_cmd_header;
274
275struct tpm_pcrread_out {
276 u8 pcr_result[TPM_DIGEST_SIZE];
277} __packed;
278
279struct tpm_pcrread_in {
280 __be32 pcr_idx;
281} __packed;
282
283struct tpm_pcrextend_in {
284 __be32 pcr_idx;
285 u8 hash[TPM_DIGEST_SIZE];
286} __packed;
287
288
289
290
291
292#define TPM_MAX_RNG_DATA 128
293
294struct tpm_getrandom_out {
295 __be32 rng_data_len;
296 u8 rng_data[TPM_MAX_RNG_DATA];
297} __packed;
298
299struct tpm_getrandom_in {
300 __be32 num_bytes;
301} __packed;
302
303struct tpm_startup_in {
304 __be16 startup_type;
305} __packed;
306
307typedef union {
308 struct tpm_getcap_params_out getcap_out;
309 struct tpm_readpubek_params_out readpubek_out;
310 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
311 struct tpm_getcap_params_in getcap_in;
312 struct tpm_pcrread_in pcrread_in;
313 struct tpm_pcrread_out pcrread_out;
314 struct tpm_pcrextend_in pcrextend_in;
315 struct tpm_getrandom_in getrandom_in;
316 struct tpm_getrandom_out getrandom_out;
317 struct tpm_startup_in startup_in;
318} tpm_cmd_params;
319
320struct tpm_cmd_t {
321 tpm_cmd_header header;
322 tpm_cmd_params params;
323} __packed;
324
325ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
326
327extern int tpm_get_timeouts(struct tpm_chip *);
328extern void tpm_gen_interrupt(struct tpm_chip *);
329extern int tpm_do_selftest(struct tpm_chip *);
330extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
331extern struct tpm_chip* tpm_register_hardware(struct device *,
332 const struct tpm_vendor_specific *);
333extern int tpm_open(struct inode *, struct file *);
334extern int tpm_release(struct inode *, struct file *);
335extern void tpm_dev_release(struct device *dev);
336extern void tpm_dev_vendor_release(struct tpm_chip *);
337extern ssize_t tpm_write(struct file *, const char __user *, size_t,
338 loff_t *);
339extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
340extern void tpm_remove_hardware(struct device *);
341extern int tpm_pm_suspend(struct device *);
342extern int tpm_pm_resume(struct device *);
343extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
344 wait_queue_head_t *, bool);
345
346#ifdef CONFIG_ACPI
347extern int tpm_add_ppi(struct kobject *);
348extern void tpm_remove_ppi(struct kobject *);
349#else
350static inline int tpm_add_ppi(struct kobject *parent)
351{
352 return 0;
353}
354
355static inline void tpm_remove_ppi(struct kobject *parent)
356{
357}
358#endif
359
