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992a60ed A |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Power Supply for UCSI | |
4 | * | |
5 | * Copyright (C) 2020, Intel Corporation | |
6 | * Author: K V, Abhilash <abhilash.k.v@intel.com> | |
7 | * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> | |
8 | */ | |
9 | ||
10 | #include <linux/property.h> | |
11 | #include <linux/usb/pd.h> | |
12 | ||
13 | #include "ucsi.h" | |
14 | ||
15 | /* Power Supply access to expose source power information */ | |
16 | enum ucsi_psy_online_states { | |
17 | UCSI_PSY_OFFLINE = 0, | |
18 | UCSI_PSY_FIXED_ONLINE, | |
19 | UCSI_PSY_PROG_ONLINE, | |
20 | }; | |
21 | ||
22 | static enum power_supply_property ucsi_psy_props[] = { | |
23 | POWER_SUPPLY_PROP_USB_TYPE, | |
24 | POWER_SUPPLY_PROP_ONLINE, | |
25 | POWER_SUPPLY_PROP_VOLTAGE_MIN, | |
26 | POWER_SUPPLY_PROP_VOLTAGE_MAX, | |
27 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
28 | POWER_SUPPLY_PROP_CURRENT_MAX, | |
29 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
a7fbfd44 | 30 | POWER_SUPPLY_PROP_SCOPE, |
992a60ed A |
31 | }; |
32 | ||
a7fbfd44 ML |
33 | static int ucsi_psy_get_scope(struct ucsi_connector *con, |
34 | union power_supply_propval *val) | |
35 | { | |
36 | u8 scope = POWER_SUPPLY_SCOPE_UNKNOWN; | |
37 | struct device *dev = con->ucsi->dev; | |
38 | ||
39 | device_property_read_u8(dev, "scope", &scope); | |
c9ca8de2 ML |
40 | if (scope == POWER_SUPPLY_SCOPE_UNKNOWN) { |
41 | u32 mask = UCSI_CAP_ATTR_POWER_AC_SUPPLY | | |
42 | UCSI_CAP_ATTR_BATTERY_CHARGING; | |
43 | ||
44 | if (con->ucsi->cap.attributes & mask) | |
45 | scope = POWER_SUPPLY_SCOPE_SYSTEM; | |
46 | else | |
47 | scope = POWER_SUPPLY_SCOPE_DEVICE; | |
48 | } | |
a7fbfd44 ML |
49 | val->intval = scope; |
50 | return 0; | |
51 | } | |
52 | ||
992a60ed A |
53 | static int ucsi_psy_get_online(struct ucsi_connector *con, |
54 | union power_supply_propval *val) | |
55 | { | |
56 | val->intval = UCSI_PSY_OFFLINE; | |
57 | if (con->status.flags & UCSI_CONSTAT_CONNECTED && | |
58 | (con->status.flags & UCSI_CONSTAT_PWR_DIR) == TYPEC_SINK) | |
59 | val->intval = UCSI_PSY_FIXED_ONLINE; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int ucsi_psy_get_voltage_min(struct ucsi_connector *con, | |
64 | union power_supply_propval *val) | |
65 | { | |
66 | u32 pdo; | |
67 | ||
68 | switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { | |
69 | case UCSI_CONSTAT_PWR_OPMODE_PD: | |
70 | pdo = con->src_pdos[0]; | |
71 | val->intval = pdo_fixed_voltage(pdo) * 1000; | |
72 | break; | |
73 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0: | |
74 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5: | |
75 | case UCSI_CONSTAT_PWR_OPMODE_BC: | |
76 | case UCSI_CONSTAT_PWR_OPMODE_DEFAULT: | |
77 | val->intval = UCSI_TYPEC_VSAFE5V * 1000; | |
78 | break; | |
79 | default: | |
80 | val->intval = 0; | |
81 | break; | |
82 | } | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static int ucsi_psy_get_voltage_max(struct ucsi_connector *con, | |
87 | union power_supply_propval *val) | |
88 | { | |
89 | u32 pdo; | |
90 | ||
91 | switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { | |
92 | case UCSI_CONSTAT_PWR_OPMODE_PD: | |
93 | if (con->num_pdos > 0) { | |
94 | pdo = con->src_pdos[con->num_pdos - 1]; | |
95 | val->intval = pdo_fixed_voltage(pdo) * 1000; | |
96 | } else { | |
97 | val->intval = 0; | |
98 | } | |
99 | break; | |
100 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0: | |
101 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5: | |
102 | case UCSI_CONSTAT_PWR_OPMODE_BC: | |
103 | case UCSI_CONSTAT_PWR_OPMODE_DEFAULT: | |
104 | val->intval = UCSI_TYPEC_VSAFE5V * 1000; | |
105 | break; | |
106 | default: | |
107 | val->intval = 0; | |
108 | break; | |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static int ucsi_psy_get_voltage_now(struct ucsi_connector *con, | |
114 | union power_supply_propval *val) | |
115 | { | |
116 | int index; | |
117 | u32 pdo; | |
118 | ||
119 | switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { | |
120 | case UCSI_CONSTAT_PWR_OPMODE_PD: | |
121 | index = rdo_index(con->rdo); | |
122 | if (index > 0) { | |
123 | pdo = con->src_pdos[index - 1]; | |
124 | val->intval = pdo_fixed_voltage(pdo) * 1000; | |
125 | } else { | |
126 | val->intval = 0; | |
127 | } | |
128 | break; | |
129 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0: | |
130 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5: | |
131 | case UCSI_CONSTAT_PWR_OPMODE_BC: | |
132 | case UCSI_CONSTAT_PWR_OPMODE_DEFAULT: | |
133 | val->intval = UCSI_TYPEC_VSAFE5V * 1000; | |
134 | break; | |
135 | default: | |
136 | val->intval = 0; | |
137 | break; | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int ucsi_psy_get_current_max(struct ucsi_connector *con, | |
143 | union power_supply_propval *val) | |
144 | { | |
145 | u32 pdo; | |
146 | ||
147 | switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { | |
148 | case UCSI_CONSTAT_PWR_OPMODE_PD: | |
149 | if (con->num_pdos > 0) { | |
150 | pdo = con->src_pdos[con->num_pdos - 1]; | |
151 | val->intval = pdo_max_current(pdo) * 1000; | |
152 | } else { | |
153 | val->intval = 0; | |
154 | } | |
155 | break; | |
156 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5: | |
157 | val->intval = UCSI_TYPEC_1_5_CURRENT * 1000; | |
158 | break; | |
159 | case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0: | |
160 | val->intval = UCSI_TYPEC_3_0_CURRENT * 1000; | |
161 | break; | |
162 | case UCSI_CONSTAT_PWR_OPMODE_BC: | |
163 | case UCSI_CONSTAT_PWR_OPMODE_DEFAULT: | |
164 | /* UCSI can't tell b/w DCP/CDP or USB2/3x1/3x2 SDP chargers */ | |
165 | default: | |
166 | val->intval = 0; | |
167 | break; | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
172 | static int ucsi_psy_get_current_now(struct ucsi_connector *con, | |
173 | union power_supply_propval *val) | |
174 | { | |
175 | u16 flags = con->status.flags; | |
176 | ||
177 | if (UCSI_CONSTAT_PWR_OPMODE(flags) == UCSI_CONSTAT_PWR_OPMODE_PD) | |
178 | val->intval = rdo_op_current(con->rdo) * 1000; | |
179 | else | |
180 | val->intval = 0; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static int ucsi_psy_get_usb_type(struct ucsi_connector *con, | |
185 | union power_supply_propval *val) | |
186 | { | |
187 | u16 flags = con->status.flags; | |
188 | ||
189 | val->intval = POWER_SUPPLY_USB_TYPE_C; | |
190 | if (flags & UCSI_CONSTAT_CONNECTED && | |
191 | UCSI_CONSTAT_PWR_OPMODE(flags) == UCSI_CONSTAT_PWR_OPMODE_PD) | |
192 | val->intval = POWER_SUPPLY_USB_TYPE_PD; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | static int ucsi_psy_get_prop(struct power_supply *psy, | |
198 | enum power_supply_property psp, | |
199 | union power_supply_propval *val) | |
200 | { | |
201 | struct ucsi_connector *con = power_supply_get_drvdata(psy); | |
202 | ||
203 | switch (psp) { | |
204 | case POWER_SUPPLY_PROP_USB_TYPE: | |
205 | return ucsi_psy_get_usb_type(con, val); | |
206 | case POWER_SUPPLY_PROP_ONLINE: | |
207 | return ucsi_psy_get_online(con, val); | |
208 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
209 | return ucsi_psy_get_voltage_min(con, val); | |
210 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
211 | return ucsi_psy_get_voltage_max(con, val); | |
212 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
213 | return ucsi_psy_get_voltage_now(con, val); | |
214 | case POWER_SUPPLY_PROP_CURRENT_MAX: | |
215 | return ucsi_psy_get_current_max(con, val); | |
216 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
217 | return ucsi_psy_get_current_now(con, val); | |
a7fbfd44 ML |
218 | case POWER_SUPPLY_PROP_SCOPE: |
219 | return ucsi_psy_get_scope(con, val); | |
992a60ed A |
220 | default: |
221 | return -EINVAL; | |
222 | } | |
223 | } | |
224 | ||
225 | static enum power_supply_usb_type ucsi_psy_usb_types[] = { | |
226 | POWER_SUPPLY_USB_TYPE_C, | |
227 | POWER_SUPPLY_USB_TYPE_PD, | |
228 | POWER_SUPPLY_USB_TYPE_PD_PPS, | |
229 | }; | |
230 | ||
231 | int ucsi_register_port_psy(struct ucsi_connector *con) | |
232 | { | |
233 | struct power_supply_config psy_cfg = {}; | |
234 | struct device *dev = con->ucsi->dev; | |
235 | char *psy_name; | |
236 | ||
237 | psy_cfg.drv_data = con; | |
238 | psy_cfg.fwnode = dev_fwnode(dev); | |
239 | ||
240 | psy_name = devm_kasprintf(dev, GFP_KERNEL, "ucsi-source-psy-%s%d", | |
241 | dev_name(dev), con->num); | |
242 | if (!psy_name) | |
243 | return -ENOMEM; | |
244 | ||
245 | con->psy_desc.name = psy_name; | |
2eda5b5f | 246 | con->psy_desc.type = POWER_SUPPLY_TYPE_USB; |
992a60ed A |
247 | con->psy_desc.usb_types = ucsi_psy_usb_types; |
248 | con->psy_desc.num_usb_types = ARRAY_SIZE(ucsi_psy_usb_types); | |
2eda5b5f ZY |
249 | con->psy_desc.properties = ucsi_psy_props; |
250 | con->psy_desc.num_properties = ARRAY_SIZE(ucsi_psy_props); | |
992a60ed A |
251 | con->psy_desc.get_property = ucsi_psy_get_prop; |
252 | ||
253 | con->psy = power_supply_register(dev, &con->psy_desc, &psy_cfg); | |
254 | ||
255 | return PTR_ERR_OR_ZERO(con->psy); | |
256 | } | |
257 | ||
258 | void ucsi_unregister_port_psy(struct ucsi_connector *con) | |
259 | { | |
260 | if (IS_ERR_OR_NULL(con->psy)) | |
261 | return; | |
262 | ||
263 | power_supply_unregister(con->psy); | |
0e6371fb HK |
264 | con->psy = NULL; |
265 | } | |
266 | ||
267 | void ucsi_port_psy_changed(struct ucsi_connector *con) | |
268 | { | |
269 | if (IS_ERR_OR_NULL(con->psy)) | |
270 | return; | |
271 | ||
272 | power_supply_changed(con->psy); | |
992a60ed | 273 | } |