aq_drvinfo.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* Atlantic Network Driver
  3 *
  4 * Copyright (C) 2014-2019 aQuantia Corporation
  5 * Copyright (C) 2019-2020 Marvell International Ltd.
  6 */
  7
  8/* File aq_drvinfo.c: Definition of common code for firmware info in sys.*/
  9
 10#include <linux/init.h>
 11#include <linux/kobject.h>
 12#include <linux/module.h>
 13#include <linux/stat.h>
 14#include <linux/string.h>
 15#include <linux/hwmon.h>
 16#include <linux/uaccess.h>
 17
 18#include "aq_drvinfo.h"
 19#include "aq_nic.h"
 20
 21#if IS_REACHABLE(CONFIG_HWMON)
 22static const char * const atl_temp_label[] = {
 23	"PHY Temperature",
 24	"MAC Temperature",
 25};
 26
 27static int aq_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
 28			 u32 attr, int channel, long *value)
 29{
 30	struct aq_nic_s *aq_nic = dev_get_drvdata(dev);
 31	int err = 0;
 32	int temp;
 33
 34	if (!aq_nic)
 35		return -EIO;
 36
 37	if (type != hwmon_temp || attr != hwmon_temp_input)
 38		return -EOPNOTSUPP;
 39
 40	switch (channel) {
 41	case 0:
 42		if (!aq_nic->aq_fw_ops->get_phy_temp)
 43			return -EOPNOTSUPP;
 44
 45		err = aq_nic->aq_fw_ops->get_phy_temp(aq_nic->aq_hw, &temp);
 46		*value = temp;
 47		break;
 48	case 1:
 49		if (!aq_nic->aq_fw_ops->get_mac_temp &&
 50		    !aq_nic->aq_hw_ops->hw_get_mac_temp)
 51			return -EOPNOTSUPP;
 52
 53		if (aq_nic->aq_fw_ops->get_mac_temp)
 54			err = aq_nic->aq_fw_ops->get_mac_temp(aq_nic->aq_hw, &temp);
 55		else
 56			err = aq_nic->aq_hw_ops->hw_get_mac_temp(aq_nic->aq_hw, &temp);
 57		*value = temp;
 58		break;
 59	default:
 60		return -EOPNOTSUPP;
 61	}
 62
 63	return err;
 64}
 65
 66static int aq_hwmon_read_string(struct device *dev,
 67				enum hwmon_sensor_types type,
 68				u32 attr, int channel, const char **str)
 69{
 70	struct aq_nic_s *aq_nic = dev_get_drvdata(dev);
 71
 72	if (!aq_nic)
 73		return -EIO;
 74
 75	if (type != hwmon_temp || attr != hwmon_temp_label)
 76		return -EOPNOTSUPP;
 77
 78	if (channel < ARRAY_SIZE(atl_temp_label))
 79		*str = atl_temp_label[channel];
 80	else
 81		return -EOPNOTSUPP;
 82
 83	return 0;
 84}
 85
 86static umode_t aq_hwmon_is_visible(const void *data,
 87				   enum hwmon_sensor_types type,
 88				   u32 attr, int channel)
 89{
 90	const struct aq_nic_s *nic = data;
 91
 92	if (type != hwmon_temp)
 93		return 0;
 94
 95	if (channel == 0 && !nic->aq_fw_ops->get_phy_temp)
 96		return 0;
 97	else if (channel == 1 && !nic->aq_fw_ops->get_mac_temp &&
 98		 !nic->aq_hw_ops->hw_get_mac_temp)
 99		return 0;
100
101	switch (attr) {
102	case hwmon_temp_input:
103	case hwmon_temp_label:
104		return 0444;
105	default:
106		return 0;
107	}
108}
109
110static const struct hwmon_ops aq_hwmon_ops = {
111	.is_visible = aq_hwmon_is_visible,
112	.read = aq_hwmon_read,
113	.read_string = aq_hwmon_read_string,
114};
115
116static const struct hwmon_channel_info * const aq_hwmon_info[] = {
117	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_LABEL,
118			   HWMON_T_INPUT | HWMON_T_LABEL),
119	NULL,
120};
121
122static const struct hwmon_chip_info aq_hwmon_chip_info = {
123	.ops = &aq_hwmon_ops,
124	.info = aq_hwmon_info,
125};
126
127int aq_drvinfo_init(struct net_device *ndev)
128{
129	struct aq_nic_s *aq_nic = netdev_priv(ndev);
130	struct device *dev = &aq_nic->pdev->dev;
131	struct device *hwmon_dev;
132	int err = 0;
133
134	hwmon_dev = devm_hwmon_device_register_with_info(dev,
135							 ndev->name,
136							 aq_nic,
137							 &aq_hwmon_chip_info,
138							 NULL);
139
140	if (IS_ERR(hwmon_dev))
141		err = PTR_ERR(hwmon_dev);
142
143	return err;
144}
145
146#else
147int aq_drvinfo_init(struct net_device *ndev) { return 0; }
148#endif