diff options
Diffstat (limited to 'include/linux/usb/tcpm.h')
| -rw-r--r-- | include/linux/usb/tcpm.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h new file mode 100644 index 000000000..09762d26f --- /dev/null +++ b/include/linux/usb/tcpm.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2015-2017 Google, Inc + */ + +#ifndef __LINUX_USB_TCPM_H +#define __LINUX_USB_TCPM_H + +#include <linux/bitops.h> +#include <linux/usb/typec.h> +#include "pd.h" + +enum typec_cc_status { + TYPEC_CC_OPEN, + TYPEC_CC_RA, + TYPEC_CC_RD, + TYPEC_CC_RP_DEF, + TYPEC_CC_RP_1_5, + TYPEC_CC_RP_3_0, +}; + +enum typec_cc_polarity { + TYPEC_POLARITY_CC1, + TYPEC_POLARITY_CC2, +}; + +/* Time to wait for TCPC to complete transmit */ +#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */ +#define PD_ROLE_SWAP_TIMEOUT (MSEC_PER_SEC * 10) +#define PD_PPS_CTRL_TIMEOUT (MSEC_PER_SEC * 10) + +enum tcpm_transmit_status { + TCPC_TX_SUCCESS = 0, + TCPC_TX_DISCARDED = 1, + TCPC_TX_FAILED = 2, +}; + +enum tcpm_transmit_type { + TCPC_TX_SOP = 0, + TCPC_TX_SOP_PRIME = 1, + TCPC_TX_SOP_PRIME_PRIME = 2, + TCPC_TX_SOP_DEBUG_PRIME = 3, + TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4, + TCPC_TX_HARD_RESET = 5, + TCPC_TX_CABLE_RESET = 6, + TCPC_TX_BIST_MODE_2 = 7 +}; + +/* Mux state attributes */ +#define TCPC_MUX_USB_ENABLED BIT(0) /* USB enabled */ +#define TCPC_MUX_DP_ENABLED BIT(1) /* DP enabled */ +#define TCPC_MUX_POLARITY_INVERTED BIT(2) /* Polarity inverted */ + +/** + * struct tcpc_dev - Port configuration and callback functions + * @fwnode: Pointer to port fwnode + * @get_vbus: Called to read current VBUS state + * @get_current_limit: + * Optional; called by the tcpm core when configured as a snk + * and cc=Rp-def. This allows the tcpm to provide a fallback + * current-limit detection method for the cc=Rp-def case. + * For example, some tcpcs may include BC1.2 charger detection + * and use that in this case. + * @set_cc: Called to set value of CC pins + * @get_cc: Called to read current CC pin values + * @set_polarity: + * Called to set polarity + * @set_vconn: Called to enable or disable VCONN + * @set_vbus: Called to enable or disable VBUS + * @set_current_limit: + * Optional; called to set current limit as negotiated + * with partner. + * @set_pd_rx: Called to enable or disable reception of PD messages + * @set_roles: Called to set power and data roles + * @start_toggling: + * Optional; if supported by hardware, called to start dual-role + * toggling or single-role connection detection. Toggling stops + * automatically if a connection is established. + * @try_role: Optional; called to set a preferred role + * @pd_transmit:Called to transmit PD message + * @set_bist_data: Turn on/off bist data mode for compliance testing + * @enable_frs: + * Optional; Called to enable/disable PD 3.0 fast role swap. + * Enabling frs is accessory dependent as not all PD3.0 + * accessories support fast role swap. + */ +struct tcpc_dev { + struct fwnode_handle *fwnode; + + int (*init)(struct tcpc_dev *dev); + int (*get_vbus)(struct tcpc_dev *dev); + int (*get_current_limit)(struct tcpc_dev *dev); + int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc); + int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1, + enum typec_cc_status *cc2); + int (*set_polarity)(struct tcpc_dev *dev, + enum typec_cc_polarity polarity); + int (*set_vconn)(struct tcpc_dev *dev, bool on); + int (*set_vbus)(struct tcpc_dev *dev, bool on, bool charge); + int (*set_current_limit)(struct tcpc_dev *dev, u32 max_ma, u32 mv); + int (*set_pd_rx)(struct tcpc_dev *dev, bool on); + int (*set_roles)(struct tcpc_dev *dev, bool attached, + enum typec_role role, enum typec_data_role data); + int (*start_toggling)(struct tcpc_dev *dev, + enum typec_port_type port_type, + enum typec_cc_status cc); + int (*try_role)(struct tcpc_dev *dev, int role); + int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type, + const struct pd_message *msg); + int (*set_bist_data)(struct tcpc_dev *dev, bool on); + int (*enable_frs)(struct tcpc_dev *dev, bool enable); +}; + +struct tcpm_port; + +struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc); +void tcpm_unregister_port(struct tcpm_port *port); + +void tcpm_vbus_change(struct tcpm_port *port); +void tcpm_cc_change(struct tcpm_port *port); +void tcpm_sink_frs(struct tcpm_port *port); +void tcpm_sourcing_vbus(struct tcpm_port *port); +void tcpm_pd_receive(struct tcpm_port *port, + const struct pd_message *msg); +void tcpm_pd_transmit_complete(struct tcpm_port *port, + enum tcpm_transmit_status status); +void tcpm_pd_hard_reset(struct tcpm_port *port); +void tcpm_tcpc_reset(struct tcpm_port *port); + +#endif /* __LINUX_USB_TCPM_H */ |