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 u32 aq_hwmon_temp_config[] = {
117 HWMON_T_INPUT | HWMON_T_LABEL,
118 HWMON_T_INPUT | HWMON_T_LABEL,
119 0,
120};
121
122static const struct hwmon_channel_info aq_hwmon_temp = {
123 .type = hwmon_temp,
124 .config = aq_hwmon_temp_config,
125};
126
127static const struct hwmon_channel_info * const aq_hwmon_info[] = {
128 &aq_hwmon_temp,
129 NULL,
130};
131
132static const struct hwmon_chip_info aq_hwmon_chip_info = {
133 .ops = &aq_hwmon_ops,
134 .info = aq_hwmon_info,
135};
136
137int aq_drvinfo_init(struct net_device *ndev)
138{
139 struct aq_nic_s *aq_nic = netdev_priv(dev: ndev);
140 struct device *dev = &aq_nic->pdev->dev;
141 struct device *hwmon_dev;
142 int err = 0;
143
144 hwmon_dev = devm_hwmon_device_register_with_info(dev,
145 name: ndev->name,
146 drvdata: aq_nic,
147 info: &aq_hwmon_chip_info,
148 NULL);
149
150 if (IS_ERR(ptr: hwmon_dev))
151 err = PTR_ERR(ptr: hwmon_dev);
152
153 return err;
154}
155
156#else
157int aq_drvinfo_init(struct net_device *ndev) { return 0; }
158#endif
159

source code of linux/drivers/net/ethernet/aquantia/atlantic/aq_drvinfo.c