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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
50enum tpm_duration {
51 TPM_SHORT = 0,
52 TPM_MEDIUM = 1,
53 TPM_LONG = 2,
54 TPM_UNDEFINED,
55};
56
57#define TPM_WARN_RETRY 0x800
58#define TPM_WARN_DOING_SELFTEST 0x802
59#define TPM_ERR_DEACTIVATED 0x6
60#define TPM_ERR_DISABLED 0x7
61#define TPM_ERR_INVALID_POSTINIT 38
62
63#define TPM_HEADER_SIZE 10
64struct tpm_chip;
65
66struct tpm_vendor_specific {
67 void __iomem *iobase;
68 unsigned long base;
69
70 int irq;
71 int probed_irq;
72
73 int region_size;
74 int have_region;
75
76 struct miscdevice miscdev;
77 struct list_head list;
78 int locality;
79 unsigned long timeout_a, timeout_b, timeout_c, timeout_d;
80 bool timeout_adjusted;
81 unsigned long duration[3];
82 bool duration_adjusted;
83 void *priv;
84
85 wait_queue_head_t read_queue;
86 wait_queue_head_t int_queue;
87
88 u16 manufacturer_id;
89};
90
91#define TPM_VPRIV(c) (c)->vendor.priv
92
93#define TPM_VID_INTEL 0x8086
94#define TPM_VID_WINBOND 0x1050
95#define TPM_VID_STM 0x104A
96
97struct tpm_chip {
98 struct device *dev;
99 const struct tpm_class_ops *ops;
100
101 int dev_num;
102 char devname[7];
103 unsigned long is_open;
104 int time_expired;
105
106 struct mutex tpm_mutex;
107
108 struct tpm_vendor_specific vendor;
109
110 struct dentry **bios_dir;
111
112 struct list_head list;
113 void (*release) (struct device *);
114};
115
116#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
117
118static inline void tpm_chip_put(struct tpm_chip *chip)
119{
120 module_put(chip->dev->driver->owner);
121}
122
123static inline int tpm_read_index(int base, int index)
124{
125 outb(index, base);
126 return inb(base+1) & 0xFF;
127}
128
129static inline void tpm_write_index(int base, int index, int value)
130{
131 outb(index, base);
132 outb(value & 0xFF, base+1);
133}
134struct tpm_input_header {
135 __be16 tag;
136 __be32 length;
137 __be32 ordinal;
138} __packed;
139
140struct tpm_output_header {
141 __be16 tag;
142 __be32 length;
143 __be32 return_code;
144} __packed;
145
146#define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
147
148struct stclear_flags_t {
149 __be16 tag;
150 u8 deactivated;
151 u8 disableForceClear;
152 u8 physicalPresence;
153 u8 physicalPresenceLock;
154 u8 bGlobalLock;
155} __packed;
156
157struct tpm_version_t {
158 u8 Major;
159 u8 Minor;
160 u8 revMajor;
161 u8 revMinor;
162} __packed;
163
164struct tpm_version_1_2_t {
165 __be16 tag;
166 u8 Major;
167 u8 Minor;
168 u8 revMajor;
169 u8 revMinor;
170} __packed;
171
172struct timeout_t {
173 __be32 a;
174 __be32 b;
175 __be32 c;
176 __be32 d;
177} __packed;
178
179struct duration_t {
180 __be32 tpm_short;
181 __be32 tpm_medium;
182 __be32 tpm_long;
183} __packed;
184
185struct permanent_flags_t {
186 __be16 tag;
187 u8 disable;
188 u8 ownership;
189 u8 deactivated;
190 u8 readPubek;
191 u8 disableOwnerClear;
192 u8 allowMaintenance;
193 u8 physicalPresenceLifetimeLock;
194 u8 physicalPresenceHWEnable;
195 u8 physicalPresenceCMDEnable;
196 u8 CEKPUsed;
197 u8 TPMpost;
198 u8 TPMpostLock;
199 u8 FIPS;
200 u8 operator;
201 u8 enableRevokeEK;
202 u8 nvLocked;
203 u8 readSRKPub;
204 u8 tpmEstablished;
205 u8 maintenanceDone;
206 u8 disableFullDALogicInfo;
207} __packed;
208
209typedef union {
210 struct permanent_flags_t perm_flags;
211 struct stclear_flags_t stclear_flags;
212 bool owned;
213 __be32 num_pcrs;
214 struct tpm_version_t tpm_version;
215 struct tpm_version_1_2_t tpm_version_1_2;
216 __be32 manufacturer_id;
217 struct timeout_t timeout;
218 struct duration_t duration;
219} cap_t;
220
221enum tpm_capabilities {
222 TPM_CAP_FLAG = cpu_to_be32(4),
223 TPM_CAP_PROP = cpu_to_be32(5),
224 CAP_VERSION_1_1 = cpu_to_be32(0x06),
225 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
226};
227
228enum tpm_sub_capabilities {
229 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
230 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
231 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
232 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
233 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
234 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
235 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
236
237};
238
239struct tpm_getcap_params_in {
240 __be32 cap;
241 __be32 subcap_size;
242 __be32 subcap;
243} __packed;
244
245struct tpm_getcap_params_out {
246 __be32 cap_size;
247 cap_t cap;
248} __packed;
249
250struct tpm_readpubek_params_out {
251 u8 algorithm[4];
252 u8 encscheme[2];
253 u8 sigscheme[2];
254 __be32 paramsize;
255 u8 parameters[12];
256 __be32 keysize;
257 u8 modulus[256];
258 u8 checksum[20];
259} __packed;
260
261typedef union {
262 struct tpm_input_header in;
263 struct tpm_output_header out;
264} tpm_cmd_header;
265
266struct tpm_pcrread_out {
267 u8 pcr_result[TPM_DIGEST_SIZE];
268} __packed;
269
270struct tpm_pcrread_in {
271 __be32 pcr_idx;
272} __packed;
273
274struct tpm_pcrextend_in {
275 __be32 pcr_idx;
276 u8 hash[TPM_DIGEST_SIZE];
277} __packed;
278
279
280
281
282
283#define TPM_MAX_RNG_DATA 128
284
285struct tpm_getrandom_out {
286 __be32 rng_data_len;
287 u8 rng_data[TPM_MAX_RNG_DATA];
288} __packed;
289
290struct tpm_getrandom_in {
291 __be32 num_bytes;
292} __packed;
293
294struct tpm_startup_in {
295 __be16 startup_type;
296} __packed;
297
298typedef union {
299 struct tpm_getcap_params_out getcap_out;
300 struct tpm_readpubek_params_out readpubek_out;
301 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
302 struct tpm_getcap_params_in getcap_in;
303 struct tpm_pcrread_in pcrread_in;
304 struct tpm_pcrread_out pcrread_out;
305 struct tpm_pcrextend_in pcrextend_in;
306 struct tpm_getrandom_in getrandom_in;
307 struct tpm_getrandom_out getrandom_out;
308 struct tpm_startup_in startup_in;
309} tpm_cmd_params;
310
311struct tpm_cmd_t {
312 tpm_cmd_header header;
313 tpm_cmd_params params;
314} __packed;
315
316ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
317
318ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
319 size_t bufsiz);
320extern int tpm_get_timeouts(struct tpm_chip *);
321extern void tpm_gen_interrupt(struct tpm_chip *);
322extern int tpm_do_selftest(struct tpm_chip *);
323extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
324extern struct tpm_chip* tpm_register_hardware(struct device *,
325 const struct tpm_class_ops *ops);
326extern void tpm_dev_vendor_release(struct tpm_chip *);
327extern void tpm_remove_hardware(struct device *);
328extern int tpm_pm_suspend(struct device *);
329extern int tpm_pm_resume(struct device *);
330extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
331 wait_queue_head_t *, bool);
332
333int tpm_dev_add_device(struct tpm_chip *chip);
334void tpm_dev_del_device(struct tpm_chip *chip);
335int tpm_sysfs_add_device(struct tpm_chip *chip);
336void tpm_sysfs_del_device(struct tpm_chip *chip);
337
338int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
339
340#ifdef CONFIG_ACPI
341extern int tpm_add_ppi(struct kobject *);
342extern void tpm_remove_ppi(struct kobject *);
343#else
344static inline int tpm_add_ppi(struct kobject *parent)
345{
346 return 0;
347}
348
349static inline void tpm_remove_ppi(struct kobject *parent)
350{
351}
352#endif
353
