1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
|
// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (C) 2018, Linaro Limited
* Copyright (c) 2021, EPAM Systems. All rights reserved.
* Copyright (c) 2022, Microchip
*
*/
#include <drivers/rtc.h>
#include <kernel/pseudo_ta.h>
#include <pta_rtc.h>
#include <string.h>
#include <tee_api_defines.h>
#include <tee_api_defines_extensions.h>
#define PTA_NAME "rtc.pta"
static void rtc_pta_copy_time_from_optee(struct pta_rtc_time *pta_time,
struct optee_rtc_time *optee_time)
{
pta_time->tm_sec = optee_time->tm_sec;
pta_time->tm_min = optee_time->tm_min;
pta_time->tm_hour = optee_time->tm_hour;
pta_time->tm_mday = optee_time->tm_mday;
pta_time->tm_mon = optee_time->tm_mon;
pta_time->tm_year = optee_time->tm_year;
pta_time->tm_wday = optee_time->tm_wday;
}
static void rtc_pta_copy_time_to_optee(struct optee_rtc_time *optee_time,
struct pta_rtc_time *pta_time)
{
optee_time->tm_sec = pta_time->tm_sec;
optee_time->tm_min = pta_time->tm_min;
optee_time->tm_hour = pta_time->tm_hour;
optee_time->tm_mday = pta_time->tm_mday;
optee_time->tm_mon = pta_time->tm_mon;
optee_time->tm_year = pta_time->tm_year;
optee_time->tm_wday = pta_time->tm_wday;
}
static void rtc_pta_copy_alarm_from_optee(struct pta_rtc_alarm *pta_alarm,
struct optee_rtc_alarm *optee_alarm)
{
pta_alarm->enabled = optee_alarm->enabled;
pta_alarm->pending = optee_alarm->pending;
rtc_pta_copy_time_from_optee(&pta_alarm->time,
&optee_alarm->time);
}
static void rtc_pta_copy_alarm_to_optee(struct optee_rtc_alarm *optee_alarm,
struct pta_rtc_alarm *pta_alarm)
{
optee_alarm->enabled = pta_alarm->enabled;
optee_alarm->pending = pta_alarm->pending;
rtc_pta_copy_time_to_optee(&optee_alarm->time,
&pta_alarm->time);
}
static TEE_Result rtc_pta_get_time(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_ERROR_GENERIC;
struct optee_rtc_time time = { };
struct pta_rtc_time *pta_time = NULL;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (!IS_ALIGNED_WITH_TYPE(params[0].memref.buffer, typeof(*pta_time)))
return TEE_ERROR_BAD_PARAMETERS;
pta_time = params[0].memref.buffer;
if (!pta_time || params[0].memref.size != sizeof(*pta_time))
return TEE_ERROR_BAD_PARAMETERS;
res = rtc_get_time(&time);
if (res)
return res;
rtc_pta_copy_time_from_optee(pta_time, &time);
return TEE_SUCCESS;
}
static TEE_Result rtc_pta_set_time(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
struct optee_rtc_time time = { };
struct pta_rtc_time *pta_time = NULL;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (!IS_ALIGNED_WITH_TYPE(params[0].memref.buffer, typeof(*pta_time)))
return TEE_ERROR_BAD_PARAMETERS;
pta_time = params[0].memref.buffer;
if (!pta_time || params[0].memref.size != sizeof(*pta_time))
return TEE_ERROR_BAD_PARAMETERS;
rtc_pta_copy_time_to_optee(&time, pta_time);
return rtc_set_time(&time);
}
static TEE_Result rtc_pta_set_offset(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
return rtc_set_offset((int32_t)params[0].value.a);
}
static TEE_Result rtc_pta_get_offset(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_ERROR_GENERIC;
long offset = 0;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
res = rtc_get_offset(&offset);
if (res)
return res;
if (offset > INT32_MAX || offset < INT32_MIN)
return TEE_ERROR_OVERFLOW;
params[0].value.a = (uint32_t)offset;
return res;
}
static TEE_Result rtc_pta_read_alarm(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_ERROR_GENERIC;
struct optee_rtc_alarm alarm = { };
struct pta_rtc_alarm *pta_alarm = NULL;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (!IS_ALIGNED_WITH_TYPE(params[0].memref.buffer, typeof(*pta_alarm)))
return TEE_ERROR_BAD_PARAMETERS;
pta_alarm = params[0].memref.buffer;
if (!pta_alarm || params[0].memref.size != sizeof(*pta_alarm))
return TEE_ERROR_BAD_PARAMETERS;
res = rtc_read_alarm(&alarm);
if (!res)
rtc_pta_copy_alarm_from_optee(pta_alarm, &alarm);
return res;
}
static TEE_Result rtc_pta_set_alarm(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
struct optee_rtc_alarm alarm = { };
struct pta_rtc_alarm *pta_alarm = NULL;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (!IS_ALIGNED_WITH_TYPE(params[0].memref.buffer, typeof(*pta_alarm)))
return TEE_ERROR_BAD_PARAMETERS;
pta_alarm = params[0].memref.buffer;
if (!pta_alarm || params[0].memref.size != sizeof(*pta_alarm))
return TEE_ERROR_BAD_PARAMETERS;
rtc_pta_copy_alarm_to_optee(&alarm, pta_alarm);
return rtc_set_alarm(&alarm);
}
static TEE_Result rtc_pta_enable_alarm(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (params[0].value.a != 0 && params[0].value.a != 1)
return TEE_ERROR_BAD_PARAMETERS;
return rtc_enable_alarm((bool)params[0].value.a);
}
static TEE_Result rtc_pta_wait_alarm(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_ERROR_GENERIC;
enum rtc_wait_alarm_status alarm_status = RTC_WAIT_ALARM_RESET;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
res = rtc_wait_alarm(&alarm_status);
if (!res)
params[0].value.a = alarm_status;
return res;
}
static TEE_Result
rtc_pta_cancel_wait_alarm(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS] __unused)
{
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
return rtc_cancel_wait_alarm();
}
static TEE_Result
rtc_pta_set_alarm_wakeup_status(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (params[0].value.a != 0 && params[0].value.a != 1)
return TEE_ERROR_BAD_PARAMETERS;
return rtc_set_alarm_wakeup_status((bool)params[0].value.a);
}
static TEE_Result rtc_pta_get_info(uint32_t types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_ERROR_GENERIC;
struct pta_rtc_info *info = NULL;
struct optee_rtc_time range_min = { };
struct optee_rtc_time range_max = { };
uint64_t features = 0;
if (types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE))
return TEE_ERROR_BAD_PARAMETERS;
if (!IS_ALIGNED_WITH_TYPE(params[0].memref.buffer, typeof(*info)))
return TEE_ERROR_BAD_PARAMETERS;
info = params[0].memref.buffer;
if (!info || params[0].memref.size != sizeof(*info))
return TEE_ERROR_BAD_PARAMETERS;
memset(info, 0, sizeof(*info));
res = rtc_get_info(&features, &range_min, &range_max);
if (res)
return res;
info->version = PTA_RTC_INFO_VERSION;
if (features & RTC_CORRECTION_FEATURE)
info->features |= PTA_RTC_FEATURE_CORRECTION;
if (features & RTC_ALARM_FEATURE)
info->features |= PTA_RTC_FEATURE_ALARM;
if (features & RTC_WAKEUP_ALARM)
info->features |= PTA_RTC_FEATURE_WAKEUP_ALARM;
rtc_pta_copy_time_from_optee(&info->range_min, &range_min);
rtc_pta_copy_time_from_optee(&info->range_max, &range_max);
return TEE_SUCCESS;
}
static TEE_Result open_session(uint32_t ptypes __unused,
TEE_Param par[TEE_NUM_PARAMS] __unused,
void **session __unused)
{
struct ts_session *ts = ts_get_current_session();
struct tee_ta_session *ta_session = to_ta_session(ts);
/* Only REE kernel is allowed to access RTC */
if (ta_session->clnt_id.login != TEE_LOGIN_REE_KERNEL)
return TEE_ERROR_ACCESS_DENIED;
return TEE_SUCCESS;
}
static TEE_Result invoke_command(void *session __unused,
uint32_t cmd, uint32_t ptypes,
TEE_Param params[TEE_NUM_PARAMS])
{
switch (cmd) {
case PTA_CMD_RTC_GET_INFO:
return rtc_pta_get_info(ptypes, params);
case PTA_CMD_RTC_GET_TIME:
return rtc_pta_get_time(ptypes, params);
case PTA_CMD_RTC_SET_TIME:
return rtc_pta_set_time(ptypes, params);
case PTA_CMD_RTC_GET_OFFSET:
return rtc_pta_get_offset(ptypes, params);
case PTA_CMD_RTC_SET_OFFSET:
return rtc_pta_set_offset(ptypes, params);
case PTA_CMD_RTC_READ_ALARM:
return rtc_pta_read_alarm(ptypes, params);
case PTA_CMD_RTC_SET_ALARM:
return rtc_pta_set_alarm(ptypes, params);
case PTA_CMD_RTC_ENABLE_ALARM:
return rtc_pta_enable_alarm(ptypes, params);
case PTA_CMD_RTC_WAIT_ALARM:
return rtc_pta_wait_alarm(ptypes, params);
case PTA_CMD_RTC_CANCEL_WAIT_ALARM:
return rtc_pta_cancel_wait_alarm(ptypes, params);
case PTA_CMD_RTC_SET_WAKE_ALARM_STATUS:
return rtc_pta_set_alarm_wakeup_status(ptypes, params);
default:
break;
}
return TEE_ERROR_NOT_IMPLEMENTED;
}
pseudo_ta_register(.uuid = PTA_RTC_UUID, .name = PTA_NAME,
.flags = PTA_DEFAULT_FLAGS | TA_FLAG_CONCURRENT |
TA_FLAG_DEVICE_ENUM,
.open_session_entry_point = open_session,
.invoke_command_entry_point = invoke_command);
|
