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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <ipmi.h>
#include <time.h>
#include <time-utils.h>
#include <device.h>
#include <opal.h>
/* Sane default (2014/01/01) */
static time_t time = 1388494800;
static void get_sel_time_complete(struct ipmi_msg *msg)
{
uint32_t result;
memcpy(&result, msg->data, 4);
time = le32_to_cpu(result);
}
static int64_t ipmi_get_sel_time(void)
{
struct ipmi_msg *msg;
msg = ipmi_mkmsg(IPMI_DEFAULT_INTERFACE, IPMI_GET_SEL_TIME,
get_sel_time_complete, &time, NULL, 0, 4);
if (!msg)
return OPAL_HARDWARE;
return ipmi_sync_queue_msg(msg);
}
static int64_t ipmi_set_sel_time(uint32_t tv)
{
struct ipmi_msg *msg;
tv = cpu_to_le32(tv);
msg = ipmi_mkmsg_simple(IPMI_SET_SEL_TIME, &tv, sizeof(tv));
if (!msg)
return OPAL_HARDWARE;
return ipmi_sync_queue_msg(msg);
}
static int64_t ipmi_opal_rtc_read(uint32_t *y_m_d,
uint64_t *h_m_s_m)
{
struct tm tm;
if (ipmi_get_sel_time() < 0)
return OPAL_HARDWARE;
gmtime_r(&time, &tm);
tm_to_datetime(&tm, y_m_d, h_m_s_m);
return OPAL_SUCCESS;
}
static int64_t ipmi_opal_rtc_write(uint32_t year_month_day,
uint64_t hour_minute_second_millisecond)
{
time_t t;
struct tm tm;
datetime_to_tm(year_month_day, hour_minute_second_millisecond, &tm);
t = mktime(&tm);
if (ipmi_set_sel_time(t))
return OPAL_HARDWARE;
return OPAL_SUCCESS;
}
void ipmi_rtc_init(void)
{
struct dt_node *np = dt_new(opal_node, "rtc");
dt_add_property_strings(np, "compatible", "ibm,opal-rtc");
opal_register(OPAL_RTC_READ, ipmi_opal_rtc_read, 2);
opal_register(OPAL_RTC_WRITE, ipmi_opal_rtc_write, 2);
}
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