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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 <device.h>
#include <ipmi.h>
#include <opal.h>
#include <skiboot.h>
#include <string.h>
#define IPMI_WRITE_SENSOR (1 << 1)
#define IPMI_SET_ASSERTION (1 << 5)
#define IPMI_ASSERTION_STATE(state) (1 << state)
#define FW_PROGRESS_SENSOR 0x0F
#define BOOT_COUNT_SENSOR 0xAA
/* Ghetto. TODO: Do something smarter */
int16_t sensors[255];
struct set_sensor_req {
u8 sensor;
u8 operation;
u8 reading[8];
};
int ipmi_set_boot_count(void)
{
struct set_sensor_req req;
struct ipmi_msg *msg;
memset(&req, 0, sizeof(req));
req.sensor = BOOT_COUNT_SENSOR;
/* Set assertion bit */
req.operation = IPMI_SET_ASSERTION;
/* Set state 2 */
req.reading[1] = IPMI_ASSERTION_STATE(2);
/* We just need the first 4 bytes */
msg = ipmi_mkmsg_simple(IPMI_SET_SENSOR_READING, &req, 4);
if (!msg)
return OPAL_HARDWARE;
return ipmi_queue_msg(msg);
}
int ipmi_set_fw_progress_sensor(uint8_t state)
{
int fw_sensor_id = sensors[FW_PROGRESS_SENSOR];
if (fw_sensor_id < 0) {
prlog(PR_DEBUG, "SENSOR: fw progress set but not present\n");
return OPAL_HARDWARE;
}
return ipmi_set_sensor(fw_sensor_id, &state, sizeof(state));
}
int ipmi_set_sensor(uint8_t sensor, uint8_t *reading, size_t len)
{
struct ipmi_msg *msg;
struct set_sensor_req request;
if (!ipmi_present())
return OPAL_CLOSED;
if (len > 8) {
prlog(PR_ERR, "IPMI: sensor setting length %zd invalid\n",
len);
return OPAL_PARAMETER;
}
memset(&request, 0, sizeof(request));
request.sensor = sensor;
request.operation = IPMI_WRITE_SENSOR;
memcpy(request.reading, reading, len);
prlog(PR_INFO, "IPMI: setting sensor %02x to %02x ...\n",
request.sensor, request.reading[0]);
/* Send the minimial length message: header plus the reading bytes */
msg = ipmi_mkmsg_simple(IPMI_SET_SENSOR_READING, &request, len + 2);
if (!msg)
return OPAL_HARDWARE;
return ipmi_queue_msg(msg);
}
void ipmi_sensor_init(void)
{
struct dt_node *n;
const struct dt_property *type, *num;
memset(sensors, -1, sizeof(sensors));
dt_for_each_compatible(dt_root, n, "ibm,ipmi-sensor") {
type = dt_find_property(n, "ipmi-sensor-type");
if (!type) {
prerror("IPMI: sensor doesn't have ipmi-sensor-type\n");
continue;
}
num = dt_find_property(n, "reg");
if (!num) {
prerror("IPMI: sensor doesn't have reg property\n");
continue;
}
sensors[(uint8_t)num->prop[0]] = type->prop[0];
}
}
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