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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 <stdio.h>
#include <bt.h>
#include <ipmi.h>
#include <opal.h>
#include <device.h>
#include <time.h>
#include <time-utils.h>
/* Sane default (2014/01/01) */
static time_t time = 1388494800;
static void ipmi_process_storage_resp(struct ipmi_msg *msg)
{
uint32_t new_time;
switch (msg->cmd) {
case IPMI_GET_SEL_TIME_CMD:
/*
* I couldn't find any mention of endianess in the IPMI spec,
* but ipmitool seemed to assume little endian?
*/
memcpy(&new_time, msg->resp_data, 4);
time = le32_to_cpu(new_time);
break;
case IPMI_SET_SEL_TIME_CMD:
/* Nothing to do in this case */
break;
default:
printf("Unsupported/invalid IPMI storage command\n");
}
}
static uint32_t time_result;
static int64_t ipmi_get_sel_time(void)
{
struct ipmi_msg *msg = malloc(sizeof(struct ipmi_msg));
if (!msg)
return OPAL_HARDWARE;
msg->cmd = IPMI_GET_SEL_TIME_CMD;
msg->netfn = IPMI_NETFN_STORAGE_REQUEST;
msg->req_data = NULL;
msg->req_data_len = 0;
msg->resp_data = (uint8_t *) &time_result;
msg->resp_data_len = 4;
if (bt_add_ipmi_msg_wait(msg))
return -1;
return time_result;
}
static int64_t ipmi_set_sel_time(uint32_t tv)
{
struct ipmi_msg *msg = malloc(sizeof(struct ipmi_msg));
if (!msg)
return OPAL_HARDWARE;
msg->cmd = IPMI_SET_SEL_TIME_CMD;
msg->netfn = IPMI_NETFN_STORAGE_REQUEST;
msg->req_data = (uint8_t *) &tv;
msg->req_data_len = 4;
msg->resp_data = NULL;
msg->resp_data_len = 0;
return bt_add_ipmi_msg_wait(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);
t = cpu_to_le32(t);
if (ipmi_set_sel_time(t))
return OPAL_HARDWARE;
return OPAL_SUCCESS;
}
static 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);
}
static void ipmi_cmd_done(struct ipmi_msg *msg)
{
if (msg->cc != IPMI_CC_NO_ERROR) {
prerror("IPMI: Got error response 0x%02x\n", msg->cc);
goto out;
}
switch (msg->netfn) {
case IPMI_NETFN_STORAGE_RESPONSE:
ipmi_process_storage_resp(msg);
break;
case IPMI_NETFN_CHASSIS_RESPONSE:
break;
default:
prerror("IPMI: Invalid IPMI function code in response\n");
}
out:
free(msg);
}
static uint8_t chassis_control;
int64_t ipmi_opal_chassis_control(uint64_t request)
{
struct ipmi_msg *msg = zalloc(sizeof(struct ipmi_msg));
if (!msg)
return OPAL_HARDWARE;
if (request > IPMI_CHASSIS_SOFT_SHUTDOWN)
return OPAL_PARAMETER;
chassis_control = request;
msg->cmd = IPMI_CHASSIS_CONTROL_CMD;
msg->netfn = IPMI_NETFN_CHASSIS_REQUEST;
msg->req_data = (uint8_t *)&chassis_control;
msg->req_data_len = sizeof(chassis_control);
msg->resp_data = NULL;
msg->resp_data_len = 0;
prlog(PR_INFO, "IPMI: sending chassis control request %llu\n",
request);
return bt_add_ipmi_msg_wait(msg);
}
void ipmi_init(void)
{
bt_init(ipmi_cmd_done);
ipmi_rtc_init();
}
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