1 // SPDX-License-Identifier: GPL-2.0
40  * struct optee_rtc - OP-TEE RTC private data
41  * @dev:		OP-TEE based RTC device.
42  * @ctx:		OP-TEE context handler.
64 	inv_arg.session = priv->session_id;  in optee_rtc_readtime()
69 	param[0].u.memref.shm = priv->shm;  in optee_rtc_readtime()
72 	ret = tee_client_invoke_func(priv->ctx, &inv_arg, param);  in optee_rtc_readtime()
74 		return ret ? ret : -EPROTO;  in optee_rtc_readtime()
76 	optee_tm = tee_shm_get_va(priv->shm, 0);  in optee_rtc_readtime()
81 		return -EPROTO;  in optee_rtc_readtime()
83 	tm->tm_sec = optee_tm->tm_sec;  in optee_rtc_readtime()
84 	tm->tm_min = optee_tm->tm_min;  in optee_rtc_readtime()
85 	tm->tm_hour = optee_tm->tm_hour;  in optee_rtc_readtime()
86 	tm->tm_mday = optee_tm->tm_mday;  in optee_rtc_readtime()
87 	tm->tm_mon = optee_tm->tm_mon;  in optee_rtc_readtime()
88 	tm->tm_year = optee_tm->tm_year - 1900;  in optee_rtc_readtime()
89 	tm->tm_wday = optee_tm->tm_wday;  in optee_rtc_readtime()
90 	tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);  in optee_rtc_readtime()
104 	optee_tm.tm_sec = tm->tm_sec;  in optee_rtc_settime()
105 	optee_tm.tm_min = tm->tm_min;  in optee_rtc_settime()
106 	optee_tm.tm_hour = tm->tm_hour;  in optee_rtc_settime()
107 	optee_tm.tm_mday = tm->tm_mday;  in optee_rtc_settime()
108 	optee_tm.tm_mon = tm->tm_mon;  in optee_rtc_settime()
109 	optee_tm.tm_year = tm->tm_year + 1900;  in optee_rtc_settime()
110 	optee_tm.tm_wday = tm->tm_wday;  in optee_rtc_settime()
113 	inv_arg.session = priv->session_id;  in optee_rtc_settime()
117 	param[0].u.memref.shm = priv->shm;  in optee_rtc_settime()
120 	rtc_data = tee_shm_get_va(priv->shm, 0);  in optee_rtc_settime()
126 	ret = tee_client_invoke_func(priv->ctx, &inv_arg, param);  in optee_rtc_settime()
128 		return ret ? ret : -EPROTO;  in optee_rtc_settime()
140 	if (!(priv->features & TA_RTC_FEATURE_CORRECTION))  in optee_rtc_readoffset()
141 		return -EOPNOTSUPP;  in optee_rtc_readoffset()
144 	inv_arg.session = priv->session_id;  in optee_rtc_readoffset()
149 	ret = tee_client_invoke_func(priv->ctx, &inv_arg, param);  in optee_rtc_readoffset()
151 		return ret ? ret : -EPROTO;  in optee_rtc_readoffset()
165 	if (!(priv->features & TA_RTC_FEATURE_CORRECTION))  in optee_rtc_setoffset()
166 		return -EOPNOTSUPP;  in optee_rtc_setoffset()
169 	inv_arg.session = priv->session_id;  in optee_rtc_setoffset()
175 	ret = tee_client_invoke_func(priv->ctx, &inv_arg, param);  in optee_rtc_setoffset()
177 		return ret ? ret : -EPROTO;  in optee_rtc_setoffset()
200 	inv_arg.session = priv->session_id;  in optee_rtc_read_info()
204 	param[0].u.memref.shm = priv->shm;  in optee_rtc_read_info()
207 	ret = tee_client_invoke_func(priv->ctx, &inv_arg, param);  in optee_rtc_read_info()
209 		return ret ? ret : -EPROTO;  in optee_rtc_read_info()
211 	info = tee_shm_get_va(priv->shm, 0);  in optee_rtc_read_info()
216 		return -EPROTO;  in optee_rtc_read_info()
218 	if (info->version != RTC_INFO_VERSION)  in optee_rtc_read_info()
219 		return -EPROTO;  in optee_rtc_read_info()
221 	*features = info->features;  in optee_rtc_read_info()
223 	tm = &info->range_min;  in optee_rtc_read_info()
224 	rtc->range_min = mktime64(tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min,  in optee_rtc_read_info()
225 				  tm->tm_sec);  in optee_rtc_read_info()
226 	tm = &info->range_max;  in optee_rtc_read_info()
227 	rtc->range_max = mktime64(tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min,  in optee_rtc_read_info()
228 				  tm->tm_sec);  in optee_rtc_read_info()
235 	if (ver->impl_id == TEE_IMPL_ID_OPTEE)  in optee_ctx_match()
254 		return -ENOMEM;  in optee_rtc_probe()
261 	priv->ctx = tee_client_open_context(NULL, optee_ctx_match, NULL, NULL);  in optee_rtc_probe()
262 	if (IS_ERR(priv->ctx))  in optee_rtc_probe()
263 		return -ENODEV;  in optee_rtc_probe()
266 	export_uuid(sess_arg.uuid, &rtc_device->id.uuid);  in optee_rtc_probe()
269 	ret = tee_client_open_session(priv->ctx, &sess_arg, NULL);  in optee_rtc_probe()
272 		err = -EINVAL;  in optee_rtc_probe()
275 	priv->session_id = sess_arg.session;  in optee_rtc_probe()
277 	shm = tee_shm_alloc_kernel_buf(priv->ctx, sizeof(struct optee_rtc_info));  in optee_rtc_probe()
279 		dev_err(priv->dev, "tee_shm_alloc_kernel_buf failed\n");  in optee_rtc_probe()
284 	priv->shm = shm;  in optee_rtc_probe()
285 	priv->dev = dev;  in optee_rtc_probe()
288 	rtc->ops = &optee_rtc_ops;  in optee_rtc_probe()
290 	err = optee_rtc_read_info(dev, rtc, &priv->features);  in optee_rtc_probe()
292 		dev_err(dev, "Failed to get RTC features from OP-TEE\n");  in optee_rtc_probe()
304 	if (!(priv->features & TA_RTC_FEATURE_CORRECTION))  in optee_rtc_probe()
305 		clear_bit(RTC_FEATURE_CORRECTION, rtc->features);  in optee_rtc_probe()
310 	tee_shm_free(priv->shm);  in optee_rtc_probe()
312 	tee_client_close_session(priv->ctx, priv->session_id);  in optee_rtc_probe()
314 	tee_client_close_context(priv->ctx);  in optee_rtc_probe()
323 	tee_client_close_session(priv->ctx, priv->session_id);  in optee_rtc_remove()
324 	tee_client_close_context(priv->ctx);  in optee_rtc_remove()
362 MODULE_DESCRIPTION("OP-TEE based RTC driver");