| /* Copyright 2020 The ChromiumOS Authors |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| /* |
| * Device Policy Manager implementation |
| * Refer to USB PD 3.0 spec, version 2.0, sections 8.2 and 8.3 |
| */ |
| |
| /* |
| * TODO(b/272518464): Work around coreboot GCC preprocessor bug. |
| * #line marks the *next* line, so it is off by one. |
| */ |
| #line 16 |
| |
| #ifndef __CROS_EC_USB_DPM_H |
| #define __CROS_EC_USB_DPM_H |
| |
| #include "ec_commands.h" |
| #include "usb_pd_tcpm.h" |
| #include "usb_sm.h" |
| |
| /** |
| * Sets the debug level for the DPM layer |
| * |
| * @param level debug level |
| */ |
| void dpm_set_debug_level(enum debug_level level); |
| |
| /* |
| * Initializes DPM state for a port. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_init(int port); |
| |
| /** |
| * Runs the Device Policy Manager State Machine |
| * |
| * @param port USB-C port number |
| * @param evt system event, ie: PD_EVENT_RX |
| * @param en 0 to disable the machine, 1 to enable the machine |
| */ |
| void dpm_run(int port, int evt, int en); |
| |
| /* |
| * Informs the DPM that a mode exit is complete. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_mode_exit_complete(int port); |
| |
| /* |
| * Informs the DPM that Exit Mode request is received |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_set_mode_exit_request(int port); |
| |
| /* Informs the DPM that the PE has performed a Data Reset (or at least |
| * determined that the port partner doesn't support one). |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_data_reset_complete(int port); |
| |
| /* |
| * Informs the DPM that PE layer is in ready state so that data role can be |
| * checked and DPM can know to exit the idle state. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_set_pe_ready(int port, bool enable); |
| |
| /* |
| * Informs the DPM that a VDM ACK was received. |
| * |
| * @param port USB-C port number |
| * @param type Transmit type (SOP, SOP') for received ACK |
| * @param vdo_count The number of VDOs in vdm; must be at least 1 |
| * @param vdm The VDM payload of the ACK |
| */ |
| void dpm_vdm_acked(int port, enum tcpci_msg_type type, int vdo_count, |
| uint32_t *vdm); |
| |
| /* |
| * Informs the DPM that a VDM NAK was received. Also applies when a VDM request |
| * received a Not Supported response or timed out waiting for a response. |
| * |
| * @param port USB-C port number |
| * @param type Transmit type (SOP, SOP') for request |
| * @param svid The SVID of the request |
| * @param vdm_cmd The VDM command of the request |
| * @param vdm_header VDM header reply (0 if a NAK wasn't actually received) |
| */ |
| void dpm_vdm_naked(int port, enum tcpci_msg_type type, uint16_t svid, |
| uint8_t vdm_cmd, uint32_t vdm_header); |
| |
| /* |
| * Clears the VDM request in progress bit for this port |
| * |
| * @param[in] port USB-C port number |
| */ |
| void dpm_clear_vdm_request(int port); |
| |
| /* |
| * Checks the VDM request in progress bit for this port |
| * |
| * @param[in] port USB-C port number |
| * @return true if VDM REQ is set |
| */ |
| bool dpm_check_vdm_request(int port); |
| |
| /* |
| * Informs the DPM of a received Attention message. Note: all Attention |
| * messages are assumed to be SOP since cables are disallowed from sending |
| * this type of VDM. |
| * |
| * @param[in] port USB-C port number |
| * @param[in] vdo_objects Number of objects filled in |
| * @param[in] buf Buffer containing received VDM (header and VDO) |
| */ |
| void dpm_notify_attention(int port, size_t vdo_objects, uint32_t *buf); |
| |
| /* |
| * Determines the current allocation for the connection, past the basic |
| * CONFIG_USB_PD_PULLUP value set by the TC (generally 1.5 A) |
| * |
| * @param port USB-C port number |
| * @param vsafe5v_pdo Copy of first Sink_Capability PDO, which should |
| * represent the vSafe5V fixed PDO |
| */ |
| void dpm_evaluate_sink_fixed_pdo(int port, uint32_t vsafe5v_pdo); |
| |
| /* |
| * Registers port as a non-PD sink, so that can be taken into account when |
| * allocating current. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_add_non_pd_sink(int port); |
| |
| /* |
| * Evaluates the request from port partner |
| * |
| * @param port USB-C port number |
| * @param rdo Request from port partner |
| */ |
| void dpm_evaluate_request_rdo(int port, uint32_t rdo); |
| |
| /* |
| * Remove this port as a sink, and reallocate maximum current as needed. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_remove_sink(int port); |
| |
| /* |
| * Remove this port as a source, and reallocate reserved FRS maximum current |
| * as needed. |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_remove_source(int port); |
| |
| /* |
| * Return the appropriate Source Capability PDO to offer this port |
| * |
| * @param src_pdo Will point to appropriate PDO to offer |
| * @param port USB-C port number |
| * @return Number of PDOs |
| */ |
| int dpm_get_source_pdo(const uint32_t **src_pdo, const int port); |
| |
| /* |
| * Report offered source current for this port |
| * |
| * @param port USB-C port number |
| * @return Current offered, in mA |
| */ |
| int dpm_get_source_current(const int port); |
| |
| /* |
| * Report we've been asked to enter BIST Shared Test Mode |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_bist_shared_mode_enter(int port); |
| |
| /* |
| * Report we've been asked to exit BIST Shared Test Mode |
| * |
| * @param port USB-C port number |
| */ |
| void dpm_bist_shared_mode_exit(int port); |
| |
| /* |
| * Set BIST Shared Test Mode |
| */ |
| enum ec_status pd_set_bist_share_mode(uint8_t enable); |
| |
| /* |
| * Get BIST Shared Test Mode status |
| */ |
| uint8_t pd_get_bist_share_mode(void); |
| /* |
| * Build SOP Status Data Block (SDB) |
| * |
| * @param port USB-C port number |
| * @param *msg pointer to pd message |
| * @param *len pointer to uint32_t holding length of SDB |
| */ |
| int dpm_get_status_msg(int port, uint8_t *msg, uint32_t *len); |
| |
| /* |
| * DPM function to handle a received alert message |
| * |
| * @param port USB-C port number |
| * @param ado Alert Data Object (ado) received from partner |
| */ |
| void dpm_handle_alert(int port, uint32_t ado); |
| |
| /* Enum for modules to describe to the DPM their setup status */ |
| enum dpm_msg_setup_status { |
| MSG_SETUP_SUCCESS, |
| MSG_SETUP_ERROR, |
| MSG_SETUP_UNSUPPORTED, |
| MSG_SETUP_MUX_WAIT, |
| }; |
| |
| /* Enum to describe current state of connected USB PD buttons */ |
| enum dpm_pd_button_state { |
| DPM_PD_BUTTON_IDLE, |
| DPM_PD_BUTTON_PRESSED, |
| }; |
| #endif /* __CROS_EC_USB_DPM_H */ |