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