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/*
* Copyright (C) 2017 Chelsio Communications. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Written by: Ganesh Goudar (ganeshgr@chelsio.com)
*/
#include "cxgb4.h"
#define CXGB4_NUM_TRIPS 1
static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev,
int *temp)
{
struct adapter *adap = tzdev->devdata;
u32 param, val;
int ret;
param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP));
ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
¶m, &val);
if (ret < 0 || val == 0)
return -1;
*temp = val * 1000;
return 0;
}
static int cxgb4_thermal_get_trip_type(struct thermal_zone_device *tzdev,
int trip, enum thermal_trip_type *type)
{
struct adapter *adap = tzdev->devdata;
if (!adap->ch_thermal.trip_temp)
return -EINVAL;
*type = adap->ch_thermal.trip_type;
return 0;
}
static int cxgb4_thermal_get_trip_temp(struct thermal_zone_device *tzdev,
int trip, int *temp)
{
struct adapter *adap = tzdev->devdata;
if (!adap->ch_thermal.trip_temp)
return -EINVAL;
*temp = adap->ch_thermal.trip_temp;
return 0;
}
static struct thermal_zone_device_ops cxgb4_thermal_ops = {
.get_temp = cxgb4_thermal_get_temp,
.get_trip_type = cxgb4_thermal_get_trip_type,
.get_trip_temp = cxgb4_thermal_get_trip_temp,
};
int cxgb4_thermal_init(struct adapter *adap)
{
struct ch_thermal *ch_thermal = &adap->ch_thermal;
int num_trip = CXGB4_NUM_TRIPS;
u32 param, val;
int ret;
/* on older firmwares we may not get the trip temperature,
* set the num of trips to 0.
*/
param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH));
ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
¶m, &val);
if (ret < 0) {
num_trip = 0; /* could not get trip temperature */
} else {
ch_thermal->trip_temp = val * 1000;
ch_thermal->trip_type = THERMAL_TRIP_CRITICAL;
}
ch_thermal->tzdev = thermal_zone_device_register("cxgb4", num_trip,
0, adap,
&cxgb4_thermal_ops,
NULL, 0, 0);
if (IS_ERR(ch_thermal->tzdev)) {
ret = PTR_ERR(ch_thermal->tzdev);
dev_err(adap->pdev_dev, "Failed to register thermal zone\n");
ch_thermal->tzdev = NULL;
return ret;
}
return 0;
}
int cxgb4_thermal_remove(struct adapter *adap)
{
if (adap->ch_thermal.tzdev)
thermal_zone_device_unregister(adap->ch_thermal.tzdev);
return 0;
}
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