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)
22 static const char * const atl_temp_label[] = {
23 "PHY Temperature",
24 "MAC Temperature",
25 };
26
aq_hwmon_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * value)27 static 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
aq_hwmon_read_string(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,const char ** str)66 static 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
aq_hwmon_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)86 static 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
110 static 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
116 static 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
122 static const struct hwmon_chip_info aq_hwmon_chip_info = {
123 .ops = &aq_hwmon_ops,
124 .info = aq_hwmon_info,
125 };
126
aq_drvinfo_init(struct net_device * ndev)127 int 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
aq_drvinfo_init(struct net_device * ndev)147 int aq_drvinfo_init(struct net_device *ndev) { return 0; }
148 #endif
149