1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef __LINUX_USB_TYPEC_H
4 #define __LINUX_USB_TYPEC_H
5
6 #include <linux/types.h>
7
8 /* USB Type-C Specification releases */
9 #define USB_TYPEC_REV_1_0 0x100 /* 1.0 */
10 #define USB_TYPEC_REV_1_1 0x110 /* 1.1 */
11 #define USB_TYPEC_REV_1_2 0x120 /* 1.2 */
12 #define USB_TYPEC_REV_1_3 0x130 /* 1.3 */
13 #define USB_TYPEC_REV_1_4 0x140 /* 1.4 */
14 #define USB_TYPEC_REV_2_0 0x200 /* 2.0 */
15
16 struct typec_partner;
17 struct typec_cable;
18 struct typec_plug;
19 struct typec_port;
20 struct typec_altmode_ops;
21 struct typec_cable_ops;
22
23 struct fwnode_handle;
24 struct device;
25
26 struct usb_power_delivery;
27 struct usb_power_delivery_desc;
28
29 enum typec_port_type {
30 TYPEC_PORT_SRC,
31 TYPEC_PORT_SNK,
32 TYPEC_PORT_DRP,
33 };
34
35 enum typec_port_data {
36 TYPEC_PORT_DFP,
37 TYPEC_PORT_UFP,
38 TYPEC_PORT_DRD,
39 };
40
41 enum typec_plug_type {
42 USB_PLUG_NONE,
43 USB_PLUG_TYPE_A,
44 USB_PLUG_TYPE_B,
45 USB_PLUG_TYPE_C,
46 USB_PLUG_CAPTIVE,
47 };
48
49 enum typec_data_role {
50 TYPEC_DEVICE,
51 TYPEC_HOST,
52 };
53
54 enum typec_role {
55 TYPEC_SINK,
56 TYPEC_SOURCE,
57 };
58
is_sink(enum typec_role role)59 static inline int is_sink(enum typec_role role)
60 {
61 return role == TYPEC_SINK;
62 }
63
is_source(enum typec_role role)64 static inline int is_source(enum typec_role role)
65 {
66 return role == TYPEC_SOURCE;
67 }
68
69 enum typec_pwr_opmode {
70 TYPEC_PWR_MODE_USB,
71 TYPEC_PWR_MODE_1_5A,
72 TYPEC_PWR_MODE_3_0A,
73 TYPEC_PWR_MODE_PD,
74 };
75
76 enum typec_accessory {
77 TYPEC_ACCESSORY_NONE,
78 TYPEC_ACCESSORY_AUDIO,
79 TYPEC_ACCESSORY_DEBUG,
80 };
81
82 #define TYPEC_MAX_ACCESSORY 3
83
84 enum typec_orientation {
85 TYPEC_ORIENTATION_NONE,
86 TYPEC_ORIENTATION_NORMAL,
87 TYPEC_ORIENTATION_REVERSE,
88 };
89
90 /*
91 * struct enter_usb_data - Enter_USB Message details
92 * @eudo: Enter_USB Data Object
93 * @active_link_training: Active Cable Plug Link Training
94 *
95 * @active_link_training is a flag that should be set with uni-directional SBRX
96 * communication, and left 0 with passive cables and with bi-directional SBRX
97 * communication.
98 */
99 struct enter_usb_data {
100 u32 eudo;
101 unsigned char active_link_training:1;
102 };
103
104 /*
105 * struct usb_pd_identity - USB Power Delivery identity data
106 * @id_header: ID Header VDO
107 * @cert_stat: Cert Stat VDO
108 * @product: Product VDO
109 * @vdo: Product Type Specific VDOs
110 *
111 * USB power delivery Discover Identity command response data.
112 *
113 * REVISIT: This is USB Power Delivery specific information, so this structure
114 * probable belongs to USB Power Delivery header file once we have them.
115 */
116 struct usb_pd_identity {
117 u32 id_header;
118 u32 cert_stat;
119 u32 product;
120 u32 vdo[3];
121 };
122
123 int typec_partner_set_identity(struct typec_partner *partner);
124 int typec_cable_set_identity(struct typec_cable *cable);
125
126 /*
127 * struct typec_altmode_desc - USB Type-C Alternate Mode Descriptor
128 * @svid: Standard or Vendor ID
129 * @mode: Index of the Mode
130 * @vdo: VDO returned by Discover Modes USB PD command
131 * @roles: Only for ports. DRP if the mode is available in both roles
132 *
133 * Description of an Alternate Mode which a connector, cable plug or partner
134 * supports.
135 */
136 struct typec_altmode_desc {
137 u16 svid;
138 u8 mode;
139 u32 vdo;
140 /* Only used with ports */
141 enum typec_port_data roles;
142 };
143
144 void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision);
145 int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes);
146 struct typec_altmode
147 *typec_partner_register_altmode(struct typec_partner *partner,
148 const struct typec_altmode_desc *desc);
149 int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes);
150 struct typec_altmode
151 *typec_plug_register_altmode(struct typec_plug *plug,
152 const struct typec_altmode_desc *desc);
153 struct typec_altmode
154 *typec_port_register_altmode(struct typec_port *port,
155 const struct typec_altmode_desc *desc);
156
157 void typec_port_register_altmodes(struct typec_port *port,
158 const struct typec_altmode_ops *ops, void *drvdata,
159 struct typec_altmode **altmodes, size_t n);
160
161 void typec_port_register_cable_ops(struct typec_altmode **altmodes, int max_altmodes,
162 const struct typec_cable_ops *ops);
163
164 void typec_unregister_altmode(struct typec_altmode *altmode);
165
166 struct typec_port *typec_altmode2port(struct typec_altmode *alt);
167
168 void typec_altmode_update_active(struct typec_altmode *alt, bool active);
169
170 void typec_altmode_set_ops(struct typec_altmode *alt,
171 const struct typec_altmode_ops *ops);
172
173 enum typec_plug_index {
174 TYPEC_PLUG_SOP_P,
175 TYPEC_PLUG_SOP_PP,
176 };
177
178 /*
179 * struct typec_plug_desc - USB Type-C Cable Plug Descriptor
180 * @index: SOP Prime for the plug connected to DFP and SOP Double Prime for the
181 * plug connected to UFP
182 *
183 * Represents USB Type-C Cable Plug.
184 */
185 struct typec_plug_desc {
186 enum typec_plug_index index;
187 };
188
189 /*
190 * struct typec_cable_desc - USB Type-C Cable Descriptor
191 * @type: The plug type from USB PD Cable VDO
192 * @active: Is the cable active or passive
193 * @identity: Result of Discover Identity command
194 * @pd_revision: USB Power Delivery Specification revision if supported
195 *
196 * Represents USB Type-C Cable attached to USB Type-C port.
197 */
198 struct typec_cable_desc {
199 enum typec_plug_type type;
200 unsigned int active:1;
201 struct usb_pd_identity *identity;
202 u16 pd_revision; /* 0300H = "3.0" */
203
204 };
205
206 /*
207 * struct typec_partner_desc - USB Type-C Partner Descriptor
208 * @usb_pd: USB Power Delivery support
209 * @accessory: Audio, Debug or none.
210 * @identity: Discover Identity command data
211 * @pd_revision: USB Power Delivery Specification Revision if supported
212 * @attach: Notification about attached USB device
213 * @deattach: Notification about removed USB device
214 *
215 * Details about a partner that is attached to USB Type-C port. If @identity
216 * member exists when partner is registered, a directory named "identity" is
217 * created to sysfs for the partner device.
218 *
219 * @pd_revision is based on the setting of the "Specification Revision" field
220 * in the message header on the initial "Source Capabilities" message received
221 * from the partner, or a "Request" message received from the partner, depending
222 * on whether our port is a Sink or a Source.
223 */
224 struct typec_partner_desc {
225 unsigned int usb_pd:1;
226 enum typec_accessory accessory;
227 struct usb_pd_identity *identity;
228 u16 pd_revision; /* 0300H = "3.0" */
229
230 void (*attach)(struct typec_partner *partner, struct device *dev);
231 void (*deattach)(struct typec_partner *partner, struct device *dev);
232 };
233
234 /**
235 * struct typec_operations - USB Type-C Port Operations
236 * @try_role: Set data role preference for DRP port
237 * @dr_set: Set Data Role
238 * @pr_set: Set Power Role
239 * @vconn_set: Source VCONN
240 * @port_type_set: Set port type
241 * @pd_get: Get available USB Power Delivery Capabilities.
242 * @pd_set: Set USB Power Delivery Capabilities.
243 */
244 struct typec_operations {
245 int (*try_role)(struct typec_port *port, int role);
246 int (*dr_set)(struct typec_port *port, enum typec_data_role role);
247 int (*pr_set)(struct typec_port *port, enum typec_role role);
248 int (*vconn_set)(struct typec_port *port, enum typec_role role);
249 int (*port_type_set)(struct typec_port *port,
250 enum typec_port_type type);
251 struct usb_power_delivery **(*pd_get)(struct typec_port *port);
252 int (*pd_set)(struct typec_port *port, struct usb_power_delivery *pd);
253 };
254
255 enum usb_pd_svdm_ver {
256 SVDM_VER_1_0 = 0,
257 SVDM_VER_2_0 = 1,
258 SVDM_VER_MAX = SVDM_VER_2_0,
259 };
260
261 /*
262 * struct typec_capability - USB Type-C Port Capabilities
263 * @type: Supported power role of the port
264 * @data: Supported data role of the port
265 * @revision: USB Type-C Specification release. Binary coded decimal
266 * @pd_revision: USB Power Delivery Specification revision if supported
267 * @svdm_version: USB PD Structured VDM version if supported
268 * @prefer_role: Initial role preference (DRP ports).
269 * @accessory: Supported Accessory Modes
270 * @fwnode: Optional fwnode of the port
271 * @driver_data: Private pointer for driver specific info
272 * @pd: Optional USB Power Delivery Support
273 * @ops: Port operations vector
274 *
275 * Static capabilities of a single USB Type-C port.
276 */
277 struct typec_capability {
278 enum typec_port_type type;
279 enum typec_port_data data;
280 u16 revision; /* 0120H = "1.2" */
281 u16 pd_revision; /* 0300H = "3.0" */
282 enum usb_pd_svdm_ver svdm_version;
283 int prefer_role;
284 enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
285 unsigned int orientation_aware:1;
286
287 struct fwnode_handle *fwnode;
288 void *driver_data;
289
290 struct usb_power_delivery *pd;
291
292 const struct typec_operations *ops;
293 };
294
295 /* Specific to try_role(). Indicates the user want's to clear the preference. */
296 #define TYPEC_NO_PREFERRED_ROLE (-1)
297
298 struct typec_port *typec_register_port(struct device *parent,
299 const struct typec_capability *cap);
300 void typec_unregister_port(struct typec_port *port);
301
302 struct typec_partner *typec_register_partner(struct typec_port *port,
303 struct typec_partner_desc *desc);
304 void typec_unregister_partner(struct typec_partner *partner);
305
306 struct typec_cable *typec_register_cable(struct typec_port *port,
307 struct typec_cable_desc *desc);
308 void typec_unregister_cable(struct typec_cable *cable);
309
310 struct typec_cable *typec_cable_get(struct typec_port *port);
311 void typec_cable_put(struct typec_cable *cable);
312 int typec_cable_is_active(struct typec_cable *cable);
313
314 struct typec_plug *typec_register_plug(struct typec_cable *cable,
315 struct typec_plug_desc *desc);
316 void typec_unregister_plug(struct typec_plug *plug);
317
318 void typec_set_data_role(struct typec_port *port, enum typec_data_role role);
319 void typec_set_pwr_role(struct typec_port *port, enum typec_role role);
320 void typec_set_vconn_role(struct typec_port *port, enum typec_role role);
321 void typec_set_pwr_opmode(struct typec_port *port, enum typec_pwr_opmode mode);
322
323 int typec_set_orientation(struct typec_port *port,
324 enum typec_orientation orientation);
325 enum typec_orientation typec_get_orientation(struct typec_port *port);
326 int typec_set_mode(struct typec_port *port, int mode);
327
328 void *typec_get_drvdata(struct typec_port *port);
329
330 int typec_get_fw_cap(struct typec_capability *cap,
331 struct fwnode_handle *fwnode);
332
333 int typec_find_pwr_opmode(const char *name);
334 int typec_find_orientation(const char *name);
335 int typec_find_port_power_role(const char *name);
336 int typec_find_power_role(const char *name);
337 int typec_find_port_data_role(const char *name);
338
339 void typec_partner_set_svdm_version(struct typec_partner *partner,
340 enum usb_pd_svdm_ver svdm_version);
341 int typec_get_negotiated_svdm_version(struct typec_port *port);
342
343 int typec_get_cable_svdm_version(struct typec_port *port);
344 void typec_cable_set_svdm_version(struct typec_cable *cable, enum usb_pd_svdm_ver svdm_version);
345
346 struct usb_power_delivery *typec_partner_usb_power_delivery_register(struct typec_partner *partner,
347 struct usb_power_delivery_desc *desc);
348
349 int typec_port_set_usb_power_delivery(struct typec_port *port, struct usb_power_delivery *pd);
350 int typec_partner_set_usb_power_delivery(struct typec_partner *partner,
351 struct usb_power_delivery *pd);
352
353 /**
354 * struct typec_connector - Representation of Type-C port for external drivers
355 * @attach: notification about device removal
356 * @deattach: notification about device removal
357 *
358 * Drivers that control the USB and other ports (DisplayPorts, etc.), that are
359 * connected to the Type-C connectors, can use these callbacks to inform the
360 * Type-C connector class about connections and disconnections. That information
361 * can then be used by the typec-port drivers to power on or off parts that are
362 * needed or not needed - as an example, in USB mode if USB2 device is
363 * enumerated, USB3 components (retimers, phys, and what have you) do not need
364 * to be powered on.
365 *
366 * The attached (enumerated) devices will be liked with the typec-partner device.
367 */
368 struct typec_connector {
369 void (*attach)(struct typec_connector *con, struct device *dev);
370 void (*deattach)(struct typec_connector *con, struct device *dev);
371 };
372
typec_attach(struct typec_connector * con,struct device * dev)373 static inline void typec_attach(struct typec_connector *con, struct device *dev)
374 {
375 if (con && con->attach)
376 con->attach(con, dev);
377 }
378
typec_deattach(struct typec_connector * con,struct device * dev)379 static inline void typec_deattach(struct typec_connector *con, struct device *dev)
380 {
381 if (con && con->deattach)
382 con->deattach(con, dev);
383 }
384
385 #endif /* __LINUX_USB_TYPEC_H */
386