1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 // Copyright (c) 2022 Pengutronix, Oleksij Rem 3 // Copyright (c) 2022 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
4 */ 4 */
5 #ifndef _LINUX_PSE_CONTROLLER_H 5 #ifndef _LINUX_PSE_CONTROLLER_H
6 #define _LINUX_PSE_CONTROLLER_H 6 #define _LINUX_PSE_CONTROLLER_H
7 7
8 #include <linux/ethtool.h> 8 #include <linux/ethtool.h>
9 #include <linux/list.h> 9 #include <linux/list.h>
10 #include <uapi/linux/ethtool.h> 10 #include <uapi/linux/ethtool.h>
11 11
12 /* Maximum current in uA according to IEEE 802 <<
13 #define MAX_PI_CURRENT 1920000 <<
14 <<
15 struct phy_device; 12 struct phy_device;
16 struct pse_controller_dev; 13 struct pse_controller_dev;
17 14
18 /** 15 /**
19 * struct pse_control_config - PSE control/cha 16 * struct pse_control_config - PSE control/channel configuration.
20 * 17 *
21 * @podl_admin_control: set PoDL PSE admin con !! 18 * @admin_cotrol: set PoDL PSE admin control as described in
22 * IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEA 19 * IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEAdminControl
23 * @c33_admin_control: set PSE admin control a <<
24 * IEEE 802.3-2022 30.9.1.2.1 acPSEAdminC <<
25 */ 20 */
26 struct pse_control_config { 21 struct pse_control_config {
27 enum ethtool_podl_pse_admin_state podl !! 22 enum ethtool_podl_pse_admin_state admin_cotrol;
28 enum ethtool_c33_pse_admin_state c33_a <<
29 }; 23 };
30 24
31 /** 25 /**
32 * struct pse_control_status - PSE control/cha 26 * struct pse_control_status - PSE control/channel status.
33 * 27 *
34 * @podl_admin_state: operational state of the 28 * @podl_admin_state: operational state of the PoDL PSE
35 * functions. IEEE 802.3-2018 30.15.1.1.2 29 * functions. IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState
36 * @podl_pw_status: power detection status of 30 * @podl_pw_status: power detection status of the PoDL PSE.
37 * IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPo 31 * IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPowerDetectionStatus:
38 * @c33_admin_state: operational state of the <<
39 * functions. IEEE 802.3-2022 30.9.1.1.2 <<
40 * @c33_pw_status: power detection status of t <<
41 * IEEE 802.3-2022 30.9.1.1.5 aPSEPowerDe <<
42 * @c33_pw_class: detected class of a powered <<
43 * IEEE 802.3-2022 30.9.1.1.8 aPSEPowerCl <<
44 * @c33_actual_pw: power currently delivered b <<
45 * IEEE 802.3-2022 30.9.1.1.23 aPSEActual <<
46 * @c33_ext_state_info: extended state informa <<
47 * @c33_avail_pw_limit: available power limit <<
48 * IEEE 802.3-2022 145.2.5.4 pse_avail_pw <<
49 * @c33_pw_limit_ranges: supported power limit <<
50 * is in charge of the memory allocation. <<
51 * @c33_pw_limit_nb_ranges: number of supporte <<
52 * ranges <<
53 */ 32 */
54 struct pse_control_status { 33 struct pse_control_status {
55 enum ethtool_podl_pse_admin_state podl 34 enum ethtool_podl_pse_admin_state podl_admin_state;
56 enum ethtool_podl_pse_pw_d_status podl 35 enum ethtool_podl_pse_pw_d_status podl_pw_status;
57 enum ethtool_c33_pse_admin_state c33_a <<
58 enum ethtool_c33_pse_pw_d_status c33_p <<
59 u32 c33_pw_class; <<
60 u32 c33_actual_pw; <<
61 struct ethtool_c33_pse_ext_state_info <<
62 u32 c33_avail_pw_limit; <<
63 struct ethtool_c33_pse_pw_limit_range <<
64 u32 c33_pw_limit_nb_ranges; <<
65 }; 36 };
66 37
67 /** 38 /**
68 * struct pse_controller_ops - PSE controller 39 * struct pse_controller_ops - PSE controller driver callbacks
69 * 40 *
70 * @ethtool_get_status: get PSE control status 41 * @ethtool_get_status: get PSE control status for ethtool interface
71 * @setup_pi_matrix: setup PI matrix of the PS !! 42 * @ethtool_set_config: set PSE control configuration over ethtool interface
72 * @pi_is_enabled: Return 1 if the PSE PI is e <<
73 * May also return negative er <<
74 * @pi_enable: Configure the PSE PI as enabled <<
75 * @pi_disable: Configure the PSE PI as disabl <<
76 * @pi_get_voltage: Return voltage similarly t <<
77 * callback. <<
78 * @pi_get_current_limit: Get the configured c <<
79 * get_current_limit re <<
80 * @pi_set_current_limit: Configure the curren <<
81 * set_current_limit re <<
82 * Should not return an <<
83 * current value set. <<
84 */ 43 */
85 struct pse_controller_ops { 44 struct pse_controller_ops {
86 int (*ethtool_get_status)(struct pse_c 45 int (*ethtool_get_status)(struct pse_controller_dev *pcdev,
87 unsigned long id, struct netli 46 unsigned long id, struct netlink_ext_ack *extack,
88 struct pse_control_status *sta 47 struct pse_control_status *status);
89 int (*setup_pi_matrix)(struct pse_cont !! 48 int (*ethtool_set_config)(struct pse_controller_dev *pcdev,
90 int (*pi_is_enabled)(struct pse_contro !! 49 unsigned long id, struct netlink_ext_ack *extack,
91 int (*pi_enable)(struct pse_controller !! 50 const struct pse_control_config *config);
92 int (*pi_disable)(struct pse_controlle <<
93 int (*pi_get_voltage)(struct pse_contr <<
94 int (*pi_get_current_limit)(struct pse <<
95 int id); <<
96 int (*pi_set_current_limit)(struct pse <<
97 int id, in <<
98 }; 51 };
99 52
100 struct module; 53 struct module;
101 struct device_node; 54 struct device_node;
102 struct of_phandle_args; 55 struct of_phandle_args;
103 struct pse_control; 56 struct pse_control;
104 57
105 /* PSE PI pairset pinout can either be Alterna <<
106 enum pse_pi_pairset_pinout { <<
107 ALTERNATIVE_A, <<
108 ALTERNATIVE_B, <<
109 }; <<
110 <<
111 /** <<
112 * struct pse_pi_pairset - PSE PI pairset enti <<
113 * alternative ant its <<
114 * <<
115 * @pinout: description of the pinout alternat <<
116 * @np: device node pointer describing the pai <<
117 */ <<
118 struct pse_pi_pairset { <<
119 enum pse_pi_pairset_pinout pinout; <<
120 struct device_node *np; <<
121 }; <<
122 <<
123 /** <<
124 * struct pse_pi - PSE PI (Power Interface) en <<
125 * IEEE 802.3-2022 145.2.4 <<
126 * <<
127 * @pairset: table of the PSE PI pinout altern <<
128 * @np: device node pointer of the PSE PI node <<
129 * @rdev: regulator represented by the PSE PI <<
130 * @admin_state_enabled: PI enabled state <<
131 */ <<
132 struct pse_pi { <<
133 struct pse_pi_pairset pairset[2]; <<
134 struct device_node *np; <<
135 struct regulator_dev *rdev; <<
136 bool admin_state_enabled; <<
137 }; <<
138 <<
139 /** 58 /**
140 * struct pse_controller_dev - PSE controller 59 * struct pse_controller_dev - PSE controller entity that might
141 * provide multipl 60 * provide multiple PSE controls
142 * @ops: a pointer to device specific struct p 61 * @ops: a pointer to device specific struct pse_controller_ops
143 * @owner: kernel module of the PSE controller 62 * @owner: kernel module of the PSE controller driver
144 * @list: internal list of PSE controller devi 63 * @list: internal list of PSE controller devices
145 * @pse_control_head: head of internal list of 64 * @pse_control_head: head of internal list of requested PSE controls
146 * @dev: corresponding driver model device str 65 * @dev: corresponding driver model device struct
147 * @of_pse_n_cells: number of cells in PSE lin 66 * @of_pse_n_cells: number of cells in PSE line specifiers
>> 67 * @of_xlate: translation function to translate from specifier as found in the
>> 68 * device tree to id as given to the PSE control ops
148 * @nr_lines: number of PSE controls in this c 69 * @nr_lines: number of PSE controls in this controller device
149 * @lock: Mutex for serialization access to th 70 * @lock: Mutex for serialization access to the PSE controller
150 * @types: types of the PSE controller <<
151 * @pi: table of PSE PIs described in this con <<
152 * @no_of_pse_pi: flag set if the pse_pis devi <<
153 */ 71 */
154 struct pse_controller_dev { 72 struct pse_controller_dev {
155 const struct pse_controller_ops *ops; 73 const struct pse_controller_ops *ops;
156 struct module *owner; 74 struct module *owner;
157 struct list_head list; 75 struct list_head list;
158 struct list_head pse_control_head; 76 struct list_head pse_control_head;
159 struct device *dev; 77 struct device *dev;
160 int of_pse_n_cells; 78 int of_pse_n_cells;
>> 79 int (*of_xlate)(struct pse_controller_dev *pcdev,
>> 80 const struct of_phandle_args *pse_spec);
161 unsigned int nr_lines; 81 unsigned int nr_lines;
162 struct mutex lock; 82 struct mutex lock;
163 enum ethtool_pse_types types; <<
164 struct pse_pi *pi; <<
165 bool no_of_pse_pi; <<
166 }; 83 };
167 84
168 #if IS_ENABLED(CONFIG_PSE_CONTROLLER) 85 #if IS_ENABLED(CONFIG_PSE_CONTROLLER)
169 int pse_controller_register(struct pse_control 86 int pse_controller_register(struct pse_controller_dev *pcdev);
170 void pse_controller_unregister(struct pse_cont 87 void pse_controller_unregister(struct pse_controller_dev *pcdev);
171 struct device; 88 struct device;
172 int devm_pse_controller_register(struct device 89 int devm_pse_controller_register(struct device *dev,
173 struct pse_co 90 struct pse_controller_dev *pcdev);
174 91
175 struct pse_control *of_pse_control_get(struct 92 struct pse_control *of_pse_control_get(struct device_node *node);
176 void pse_control_put(struct pse_control *psec) 93 void pse_control_put(struct pse_control *psec);
177 94
178 int pse_ethtool_get_status(struct pse_control 95 int pse_ethtool_get_status(struct pse_control *psec,
179 struct netlink_ext_ 96 struct netlink_ext_ack *extack,
180 struct pse_control_ 97 struct pse_control_status *status);
181 int pse_ethtool_set_config(struct pse_control 98 int pse_ethtool_set_config(struct pse_control *psec,
182 struct netlink_ext_ 99 struct netlink_ext_ack *extack,
183 const struct pse_co 100 const struct pse_control_config *config);
184 int pse_ethtool_set_pw_limit(struct pse_contro <<
185 struct netlink_ex <<
186 const unsigned in <<
187 int pse_ethtool_get_pw_limit(struct pse_contro <<
188 struct netlink_ex <<
189 <<
190 bool pse_has_podl(struct pse_control *psec); <<
191 bool pse_has_c33(struct pse_control *psec); <<
192 101
193 #else 102 #else
194 103
195 static inline struct pse_control *of_pse_contr 104 static inline struct pse_control *of_pse_control_get(struct device_node *node)
196 { 105 {
197 return ERR_PTR(-ENOENT); 106 return ERR_PTR(-ENOENT);
198 } 107 }
199 108
200 static inline void pse_control_put(struct pse_ 109 static inline void pse_control_put(struct pse_control *psec)
201 { 110 {
202 } 111 }
203 112
204 static inline int pse_ethtool_get_status(struc 113 static inline int pse_ethtool_get_status(struct pse_control *psec,
205 struc 114 struct netlink_ext_ack *extack,
206 struc 115 struct pse_control_status *status)
207 { 116 {
208 return -EOPNOTSUPP; 117 return -EOPNOTSUPP;
209 } 118 }
210 119
211 static inline int pse_ethtool_set_config(struc 120 static inline int pse_ethtool_set_config(struct pse_control *psec,
212 struc 121 struct netlink_ext_ack *extack,
213 const 122 const struct pse_control_config *config)
214 { 123 {
215 return -EOPNOTSUPP; 124 return -EOPNOTSUPP;
216 } <<
217 <<
218 static inline int pse_ethtool_set_pw_limit(str <<
219 str <<
220 con <<
221 { <<
222 return -EOPNOTSUPP; <<
223 } <<
224 <<
225 static inline int pse_ethtool_get_pw_limit(str <<
226 str <<
227 { <<
228 return -EOPNOTSUPP; <<
229 } <<
230 <<
231 static inline bool pse_has_podl(struct pse_con <<
232 { <<
233 return false; <<
234 } <<
235 <<
236 static inline bool pse_has_c33(struct pse_cont <<
237 { <<
238 return false; <<
239 } 125 }
240 126
241 #endif 127 #endif
242 128
243 #endif 129 #endif
244 130
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