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)
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 
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 
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 
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
129 int aq_drvinfo_init(struct net_device *ndev) { return 0; }
130 #endif
131