1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright 2015-2017 Google, Inc 4 */ 5 6 #ifndef __LINUX_USB_TCPM_H 7 #define __LINUX_USB_TCPM_H 8 9 #include <linux/bitops.h> 10 #include <linux/usb/typec.h> 11 #include "pd.h" 12 13 enum typec_cc_status { 14 TYPEC_CC_OPEN, 15 TYPEC_CC_RA, 16 TYPEC_CC_RD, 17 TYPEC_CC_RP_DEF, 18 TYPEC_CC_RP_1_5, 19 TYPEC_CC_RP_3_0, 20 }; 21 22 enum typec_cc_polarity { 23 TYPEC_POLARITY_CC1, 24 TYPEC_POLARITY_CC2, 25 }; 26 27 /* Time to wait for TCPC to complete transmit */ 28 #define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */ 29 #define PD_ROLE_SWAP_TIMEOUT (MSEC_PER_SEC * 10) 30 #define PD_PPS_CTRL_TIMEOUT (MSEC_PER_SEC * 10) 31 32 enum tcpm_transmit_status { 33 TCPC_TX_SUCCESS = 0, 34 TCPC_TX_DISCARDED = 1, 35 TCPC_TX_FAILED = 2, 36 }; 37 38 enum tcpm_transmit_type { 39 TCPC_TX_SOP = 0, 40 TCPC_TX_SOP_PRIME = 1, 41 TCPC_TX_SOP_PRIME_PRIME = 2, 42 TCPC_TX_SOP_DEBUG_PRIME = 3, 43 TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4, 44 TCPC_TX_HARD_RESET = 5, 45 TCPC_TX_CABLE_RESET = 6, 46 TCPC_TX_BIST_MODE_2 = 7 47 }; 48 49 /* Mux state attributes */ 50 #define TCPC_MUX_USB_ENABLED BIT(0) /* USB enabled */ 51 #define TCPC_MUX_DP_ENABLED BIT(1) /* DP enabled */ 52 #define TCPC_MUX_POLARITY_INVERTED BIT(2) /* Polarity inverted */ 53 54 /** 55 * struct tcpc_dev - Port configuration and callback functions 56 * @fwnode: Pointer to port fwnode 57 * @get_vbus: Called to read current VBUS state 58 * @get_current_limit: 59 * Optional; called by the tcpm core when configured as a snk 60 * and cc=Rp-def. This allows the tcpm to provide a fallback 61 * current-limit detection method for the cc=Rp-def case. 62 * For example, some tcpcs may include BC1.2 charger detection 63 * and use that in this case. 64 * @set_cc: Called to set value of CC pins 65 * @get_cc: Called to read current CC pin values 66 * @set_polarity: 67 * Called to set polarity 68 * @set_vconn: Called to enable or disable VCONN 69 * @set_vbus: Called to enable or disable VBUS 70 * @set_current_limit: 71 * Optional; called to set current limit as negotiated 72 * with partner. 73 * @set_pd_rx: Called to enable or disable reception of PD messages 74 * @set_roles: Called to set power and data roles 75 * @start_toggling: 76 * Optional; if supported by hardware, called to start dual-role 77 * toggling or single-role connection detection. Toggling stops 78 * automatically if a connection is established. 79 * @try_role: Optional; called to set a preferred role 80 * @pd_transmit:Called to transmit PD message 81 * @mux: Pointer to multiplexer data 82 */ 83 struct tcpc_dev { 84 struct fwnode_handle *fwnode; 85 86 int (*init)(struct tcpc_dev *dev); 87 int (*get_vbus)(struct tcpc_dev *dev); 88 int (*get_current_limit)(struct tcpc_dev *dev); 89 int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc); 90 int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1, 91 enum typec_cc_status *cc2); 92 int (*set_polarity)(struct tcpc_dev *dev, 93 enum typec_cc_polarity polarity); 94 int (*set_vconn)(struct tcpc_dev *dev, bool on); 95 int (*set_vbus)(struct tcpc_dev *dev, bool on, bool charge); 96 int (*set_current_limit)(struct tcpc_dev *dev, u32 max_ma, u32 mv); 97 int (*set_pd_rx)(struct tcpc_dev *dev, bool on); 98 int (*set_roles)(struct tcpc_dev *dev, bool attached, 99 enum typec_role role, enum typec_data_role data); 100 int (*start_toggling)(struct tcpc_dev *dev, 101 enum typec_port_type port_type, 102 enum typec_cc_status cc); 103 int (*try_role)(struct tcpc_dev *dev, int role); 104 int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type, 105 const struct pd_message *msg); 106 }; 107 108 struct tcpm_port; 109 110 struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc); 111 void tcpm_unregister_port(struct tcpm_port *port); 112 113 void tcpm_vbus_change(struct tcpm_port *port); 114 void tcpm_cc_change(struct tcpm_port *port); 115 void tcpm_pd_receive(struct tcpm_port *port, 116 const struct pd_message *msg); 117 void tcpm_pd_transmit_complete(struct tcpm_port *port, 118 enum tcpm_transmit_status status); 119 void tcpm_pd_hard_reset(struct tcpm_port *port); 120 void tcpm_tcpc_reset(struct tcpm_port *port); 121 122 #endif /* __LINUX_USB_TCPM_H */ 123