2 * Copyright 2015-2017 Google, Inc
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #ifndef __LINUX_USB_TCPM_H
16 #define __LINUX_USB_TCPM_H
18 #include <linux/bitops.h>
19 #include <linux/usb/typec.h>
22 enum typec_cc_status {
31 enum typec_cc_polarity {
36 /* Time to wait for TCPC to complete transmit */
37 #define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */
38 #define PD_ROLE_SWAP_TIMEOUT (MSEC_PER_SEC * 10)
39 #define PD_PPS_CTRL_TIMEOUT (MSEC_PER_SEC * 10)
41 enum tcpm_transmit_status {
43 TCPC_TX_DISCARDED = 1,
47 enum tcpm_transmit_type {
49 TCPC_TX_SOP_PRIME = 1,
50 TCPC_TX_SOP_PRIME_PRIME = 2,
51 TCPC_TX_SOP_DEBUG_PRIME = 3,
52 TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4,
53 TCPC_TX_HARD_RESET = 5,
54 TCPC_TX_CABLE_RESET = 6,
55 TCPC_TX_BIST_MODE_2 = 7
59 * struct tcpc_config - Port configuration
60 * @src_pdo: PDO parameters sent to port partner as response to
61 * PD_CTRL_GET_SOURCE_CAP message
62 * @nr_src_pdo: Number of entries in @src_pdo
63 * @snk_pdo: PDO parameters sent to partner as response to
64 * PD_CTRL_GET_SINK_CAP message
65 * @nr_snk_pdo: Number of entries in @snk_pdo
67 * Required operating sink power in mW
68 * @type: Port type (TYPEC_PORT_DFP, TYPEC_PORT_UFP, or
71 * Default port role (TYPEC_SINK or TYPEC_SOURCE).
72 * Set to TYPEC_NO_PREFERRED_ROLE if no default role.
73 * @try_role_hw:True if try.{Src,Snk} is implemented in hardware
74 * @alt_modes: List of supported alternate modes
78 unsigned int nr_src_pdo;
81 unsigned int nr_snk_pdo;
84 unsigned int nr_snk_vdo;
86 unsigned int operating_snk_mw;
88 enum typec_port_type type;
89 enum typec_port_data data;
90 enum typec_role default_role;
91 bool try_role_hw; /* try.{src,snk} implemented in hardware */
93 const struct typec_altmode_desc *alt_modes;
96 /* Mux state attributes */
97 #define TCPC_MUX_USB_ENABLED BIT(0) /* USB enabled */
98 #define TCPC_MUX_DP_ENABLED BIT(1) /* DP enabled */
99 #define TCPC_MUX_POLARITY_INVERTED BIT(2) /* Polarity inverted */
102 * struct tcpc_dev - Port configuration and callback functions
103 * @config: Pointer to port configuration
104 * @fwnode: Pointer to port fwnode
105 * @get_vbus: Called to read current VBUS state
106 * @get_current_limit:
107 * Optional; called by the tcpm core when configured as a snk
108 * and cc=Rp-def. This allows the tcpm to provide a fallback
109 * current-limit detection method for the cc=Rp-def case.
110 * For example, some tcpcs may include BC1.2 charger detection
111 * and use that in this case.
112 * @set_cc: Called to set value of CC pins
113 * @get_cc: Called to read current CC pin values
115 * Called to set polarity
116 * @set_vconn: Called to enable or disable VCONN
117 * @set_vbus: Called to enable or disable VBUS
118 * @set_current_limit:
119 * Optional; called to set current limit as negotiated
121 * @set_pd_rx: Called to enable or disable reception of PD messages
122 * @set_roles: Called to set power and data roles
123 * @start_drp_toggling:
124 * Optional; if supported by hardware, called to start DRP
125 * toggling. DRP toggling is stopped automatically if
126 * a connection is established.
127 * @try_role: Optional; called to set a preferred role
128 * @pd_transmit:Called to transmit PD message
129 * @mux: Pointer to multiplexer data
132 const struct tcpc_config *config;
133 struct fwnode_handle *fwnode;
135 int (*init)(struct tcpc_dev *dev);
136 int (*get_vbus)(struct tcpc_dev *dev);
137 int (*get_current_limit)(struct tcpc_dev *dev);
138 int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc);
139 int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1,
140 enum typec_cc_status *cc2);
141 int (*set_polarity)(struct tcpc_dev *dev,
142 enum typec_cc_polarity polarity);
143 int (*set_vconn)(struct tcpc_dev *dev, bool on);
144 int (*set_vbus)(struct tcpc_dev *dev, bool on, bool charge);
145 int (*set_current_limit)(struct tcpc_dev *dev, u32 max_ma, u32 mv);
146 int (*set_pd_rx)(struct tcpc_dev *dev, bool on);
147 int (*set_roles)(struct tcpc_dev *dev, bool attached,
148 enum typec_role role, enum typec_data_role data);
149 int (*start_drp_toggling)(struct tcpc_dev *dev,
150 enum typec_cc_status cc);
151 int (*try_role)(struct tcpc_dev *dev, int role);
152 int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type,
153 const struct pd_message *msg);
158 struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc);
159 void tcpm_unregister_port(struct tcpm_port *port);
161 int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
162 unsigned int nr_pdo);
163 int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
165 unsigned int operating_snk_mw);
167 void tcpm_vbus_change(struct tcpm_port *port);
168 void tcpm_cc_change(struct tcpm_port *port);
169 void tcpm_pd_receive(struct tcpm_port *port,
170 const struct pd_message *msg);
171 void tcpm_pd_transmit_complete(struct tcpm_port *port,
172 enum tcpm_transmit_status status);
173 void tcpm_pd_hard_reset(struct tcpm_port *port);
174 void tcpm_tcpc_reset(struct tcpm_port *port);
176 #endif /* __LINUX_USB_TCPM_H */