/* Copyright 2014 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "atomic.h" #include "charge_manager.h" #include "common.h" #include "console.h" #include "ec_commands.h" #include "flash.h" #include "gpio.h" #include "hooks.h" #include "host_command.h" #include "mkbp_event.h" #include "registers.h" #include "rsa.h" #include "sha256.h" #include "system.h" #include "task.h" #include "tcpm.h" #include "timer.h" #include "util.h" #include "usb_api.h" #include "usb_common.h" #include "usb_mux.h" #include "usb_pd.h" #include "usbc_ppc.h" #include "version.h" #ifdef CONFIG_COMMON_RUNTIME #define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) #define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args) #else #define CPRINTS(format, args...) #define CPRINTF(format, args...) #endif static int rw_flash_changed = 1; #ifdef CONFIG_MKBP_EVENT static int dp_alt_mode_entry_get_next_event(uint8_t *data) { return EC_SUCCESS; } DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_DP_ALT_MODE_ENTERED, dp_alt_mode_entry_get_next_event); #endif /* CONFIG_MKBP_EVENT */ #ifdef CONFIG_USB_PD_DUAL_ROLE /* Last received source cap */ static uint32_t pd_src_caps[CONFIG_USB_PD_PORT_MAX_COUNT][PDO_MAX_OBJECTS]; static uint8_t pd_src_cap_cnt[CONFIG_USB_PD_PORT_MAX_COUNT]; const uint32_t * const pd_get_src_caps(int port) { return pd_src_caps[port]; } void pd_set_src_caps(int port, int cnt, uint32_t *src_caps) { int i; pd_src_cap_cnt[port] = cnt; for (i = 0; i < cnt; i++) pd_src_caps[port][i] = *src_caps++; } uint8_t pd_get_src_cap_cnt(int port) { return pd_src_cap_cnt[port]; } #endif /* CONFIG_USB_PD_DUAL_ROLE */ static struct pd_cable cable[CONFIG_USB_PD_PORT_MAX_COUNT]; bool is_transmit_msg_sop_prime(int port) { return (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP) && (cable[port].flags & CABLE_FLAGS_SOP_PRIME_ENABLE)); } bool is_transmit_msg_sop_prime_prime(int port) { return (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP) && (cable[port].flags & CABLE_FLAGS_SOP_PRIME_PRIME_ENABLE)); } bool consume_sop_prime_repeat_msg(int port, uint8_t msg_id) { if (cable[port].last_sop_p_msg_id != msg_id) { cable[port].last_sop_p_msg_id = msg_id; return false; } CPRINTF("C%d SOP Prime repeat msg_id %d\n", port, msg_id); return true; } bool consume_sop_prime_prime_repeat_msg(int port, uint8_t msg_id) { if (cable[port].last_sop_p_p_msg_id != msg_id) { cable[port].last_sop_p_p_msg_id = msg_id; return false; } CPRINTF("C%d SOP Prime Prime repeat msg_id %d\n", port, msg_id); return true; } static void disable_transmit_sop_prime(int port) { if (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP)) cable[port].flags &= ~CABLE_FLAGS_SOP_PRIME_ENABLE; } static void disable_transmit_sop_prime_prime(int port) { if (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP)) cable[port].flags &= ~CABLE_FLAGS_SOP_PRIME_PRIME_ENABLE; } enum pd_msg_type pd_msg_tx_type(int port, enum pd_data_role data_role, uint32_t pd_flags) { /* * Ref: USB PD 3.0 sec 2.5.4: When an Explicit Contract is in place the * VCONN Source (either the DFP or the UFP) can communicate with the * Cable Plug(s) using SOP’/SOP’’ Packets * * Ref: USB PD 2.0 sec 2.4.4: When an Explicit Contract is in place the * DFP (either the Source or the Sink) can communicate with the * Cable Plug(s) using SOP’/SOP” Packets. * Sec 3.6.11 : Before communicating with a Cable Plug a Port Should * ensure that it is the Vconn Source */ if (pd_flags & PD_FLAGS_VCONN_ON && (IS_ENABLED(CONFIG_USB_PD_REV30) || data_role == PD_ROLE_DFP)) { if (is_transmit_msg_sop_prime(port)) return PD_MSG_SOP_PRIME; if (is_transmit_msg_sop_prime_prime(port)) return PD_MSG_SOP_PRIME_PRIME; } if (is_transmit_msg_sop_prime(port)) { /* * Clear the CABLE_FLAGS_SOP_PRIME_ENABLE flag if the port is * unable to communicate with the cable plug. */ disable_transmit_sop_prime(port); } else if (is_transmit_msg_sop_prime_prime(port)) { /* * Clear the CABLE_FLAGS_SOP_PRIME_PRIME_ENABLE flag if the port * is unable to communicate with the cable plug. */ disable_transmit_sop_prime_prime(port); } return PD_MSG_SOP; } void reset_pd_cable(int port) { memset(&cable[port], 0, sizeof(cable[port])); cable[port].last_sop_p_msg_id = INVALID_MSG_ID_COUNTER; cable[port].last_sop_p_p_msg_id = INVALID_MSG_ID_COUNTER; } union tbt_mode_resp_cable get_cable_tbt_vdo(int port) { /* * Return Discover mode SOP prime response for Thunderbolt-compatible * mode SVDO. */ return cable[port].cable_mode_resp; } union tbt_mode_resp_device get_dev_tbt_vdo(int port) { /* * Return Discover mode SOP response for Thunderbolt-compatible * mode SVDO. */ return cable[port].dev_mode_resp; } enum tbt_compat_cable_speed get_tbt_cable_speed(int port) { /* tbt_cable_speed is zero when uninitialized */ return cable[port].cable_mode_resp.tbt_cable_speed; } enum tbt_compat_rounded_support get_tbt_rounded_support(int port) { /* tbt_rounded_support is zero when uninitialized */ return cable[port].cable_mode_resp.tbt_rounded; } static enum usb_rev30_ss get_usb4_cable_speed(int port) { if ((cable[port].rev == PD_REV30) && (get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) && ((cable[port].attr.p_rev30.ss != USB_R30_SS_U32_U40_GEN2) || !IS_ENABLED(CONFIG_USB_PD_TBT_GEN3_CAPABLE))) { return cable[port].attr.p_rev30.ss; } /* * Converting Thunderolt-Compatible cable speed to equivalent USB4 cable * speed. */ return cable[port].cable_mode_resp.tbt_cable_speed == TBT_SS_TBT_GEN3 ? USB_R30_SS_U40_GEN3 : USB_R30_SS_U32_U40_GEN2; } uint32_t get_enter_usb_msg_payload(int port) { /* * Ref: USB Power Delivery Specification Revision 3.0, Version 2.0 * Table 6-47 Enter_USB Data Object */ union enter_usb_data_obj eudo; if (!IS_ENABLED(CONFIG_USB_PD_USB4)) return 0; eudo.mode = USB_PD_40; eudo.usb4_drd_cap = IS_ENABLED(CONFIG_USB_PD_USB4); eudo.usb3_drd_cap = IS_ENABLED(CONFIG_USB_PD_USB32); eudo.cable_speed = get_usb4_cable_speed(port); if ((cable[port].rev == PD_REV30) && (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE)) { eudo.cable_type = (cable[port].attr2.a2_rev30.active_elem == ACTIVE_RETIMER) ? CABLE_TYPE_ACTIVE_RETIMER : CABLE_TYPE_ACTIVE_REDRIVER; /* TODO: Add eudo.cable_type for Revisiosn 2 active cables */ } else { eudo.cable_type = CABLE_TYPE_PASSIVE; } switch (cable[port].attr.p_rev20.vbus_cur) { case USB_VBUS_CUR_3A: eudo.cable_current = USB4_CABLE_CURRENT_3A; break; case USB_VBUS_CUR_5A: eudo.cable_current = USB4_CABLE_CURRENT_5A; break; default: eudo.cable_current = USB4_CABLE_CURRENT_INVALID; break; } eudo.pcie_supported = IS_ENABLED(CONFIG_USB_PD_PCIE_TUNNELING); eudo.dp_supported = IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP); eudo.tbt_supported = IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE); eudo.host_present = 1; return eudo.raw_value; } bool should_enter_usb4_mode(int port) { return IS_ENABLED(CONFIG_USB_PD_USB4) && cable[port].flags & CABLE_FLAGS_ENTER_USB_MODE; } void enable_enter_usb4_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_USB4)) cable[port].flags |= CABLE_FLAGS_ENTER_USB_MODE; } void disable_enter_usb4_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_USB4)) cable[port].flags &= ~CABLE_FLAGS_ENTER_USB_MODE; } #ifdef CONFIG_USB_PD_ALT_MODE #ifdef CONFIG_USB_PD_ALT_MODE_DFP static struct pd_discovery discovery[CONFIG_USB_PD_PORT_MAX_COUNT]; static void enable_transmit_sop_prime(int port) { if (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP)) cable[port].flags |= CABLE_FLAGS_SOP_PRIME_ENABLE; } static void enable_transmit_sop_prime_prime(int port) { if (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP)) cable[port].flags |= CABLE_FLAGS_SOP_PRIME_PRIME_ENABLE; } static bool is_tbt_compat_enabled(int port) { return (IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE) && (cable[port].flags & CABLE_FLAGS_TBT_COMPAT_ENABLE)); } static void enable_tbt_compat_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE)) cable[port].flags |= CABLE_FLAGS_TBT_COMPAT_ENABLE; } static inline void disable_tbt_compat_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE)) cable[port].flags &= ~CABLE_FLAGS_TBT_COMPAT_ENABLE; } static void set_tbt_compat_mode_ready(int port) { if (IS_ENABLED(CONFIG_USBC_SS_MUX) && IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE)) { /* Connect the SBU and USB lines to the connector. */ if (IS_ENABLED(CONFIG_USBC_PPC_SBU)) ppc_set_sbu(port, 1); /* Set usb mux to Thunderbolt-compatible mode */ usb_mux_set(port, USB_PD_MUX_TBT_COMPAT_ENABLED, USB_SWITCH_CONNECT, pd_get_polarity(port)); } } /* * Ref: USB Type-C Cable and Connector Specification * Figure F-1 TBT3 Discovery Flow */ static bool is_tbt_cable_superspeed(int port) { if (IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE) && IS_ENABLED(CONFIG_USB_PD_DECODE_SOP)) { /* Product type is Active cable, hence don't check for speed */ if (cable[port].type == IDH_PTYPE_ACABLE) return true; if (cable[port].type != IDH_PTYPE_PCABLE) return false; if (IS_ENABLED(CONFIG_USB_PD_REV30) && cable[port].rev == PD_REV30) return cable[port].attr.p_rev30.ss == USB_R30_SS_U32_U40_GEN1 || cable[port].attr.p_rev30.ss == USB_R30_SS_U32_U40_GEN2 || cable[port].attr.p_rev30.ss == USB_R30_SS_U40_GEN3; return cable[port].attr.p_rev20.ss == USB_R20_SS_U31_GEN1 || cable[port].attr.p_rev20.ss == USB_R20_SS_U31_GEN1_GEN2; } return false; } /* Check if product supports any Modal Operation (Alternate Modes) */ static bool is_modal(int port, int cnt, uint32_t *payload) { return IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE) && is_vdo_present(cnt, VDO_INDEX_IDH) && PD_IDH_IS_MODAL(payload[VDO_INDEX_IDH]); } static bool is_intel_svid(int port, int prev_svid_cnt) { int i; /* * Check if SVID0 = USB_VID_INTEL * (Ref: USB Type-C cable and connector specification, Table F-9) */ if (IS_ENABLED(CONFIG_USB_PD_TBT_COMPAT_MODE)) { /* * errata: All the Thunderbolt certified cables and docks * tested have SVID1 = 0x8087 * * For the Discover SVIDs, responder may present the SVIDs * in any order hence check all SVIDs if Intel SVID present. */ for (i = prev_svid_cnt; i < discovery[port].svid_cnt; i++) { if (discovery[port].svids[i].svid == USB_VID_INTEL) return true; } } return false; } static inline bool is_tbt_compat_mode(int port, int cnt, uint32_t *payload) { /* * Ref: USB Type-C cable and connector specification * F.2.5 TBT3 Device Discover Mode Responses */ return is_vdo_present(cnt, VDO_INDEX_IDH) && PD_VDO_RESP_MODE_INTEL_TBT(payload[VDO_INDEX_IDH]); } static inline void limit_tbt_cable_speed(int port) { /* Cable flags are cleared when cable reset is called */ cable[port].flags |= CABLE_FLAGS_TBT_COMPAT_LIMIT_SPEED; } static inline bool is_limit_tbt_cable_speed(int port) { return !!(cable[port].flags & CABLE_FLAGS_TBT_COMPAT_LIMIT_SPEED); } static inline bool is_usb4_mode_enabled(int port) { return (IS_ENABLED(CONFIG_USB_PD_USB4) && (cable[port].flags & CABLE_FLAGS_USB4_CAPABLE)); } static inline void enable_usb4_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_USB4)) cable[port].flags |= CABLE_FLAGS_USB4_CAPABLE; } static inline void disable_usb4_mode(int port) { if (IS_ENABLED(CONFIG_USB_PD_USB4)) cable[port].flags &= ~CABLE_FLAGS_USB4_CAPABLE; } /* * Ref: USB Type-C Cable and Connector Specification * Figure 5-1 USB4 Discovery and Entry Flow Model. * * Note: USB Type-C Cable and Connector Specification * doesn't include details for Revision 2 cables. * * Passive Cable * | * ----------------------------------- * | | * Revision 2 Revision 3 * USB Signalling USB Signalling * | | * ------------------ ------------------------- * | | | | | | | * USB2.0 USB3.1 USB3.1 USB3.2 USB4 USB3.2 USB2 * | Gen1 Gen1 Gen2 Gen2 Gen3 Gen1 | * | | | | | | Exit * -------- ------------ -------- USB4 * | | | Discovery. * Exit Is DFP Gen3 Capable? Enter USB4 * USB4 | with respective * Discovery. --- No ---|--- Yes --- cable speed. * | | * Enter USB4 with Is Cable TBT3 * respective cable | * speed. --- No ---|--- Yes --- * | | * Enter USB4 with Enter USB4 with * TBT Gen2 passive TBT Gen3 passive * cable. cable. * */ static bool is_cable_ready_to_enter_usb4(int port, int cnt) { /* TODO: USB4 enter mode for Active cables */ if (IS_ENABLED(CONFIG_USB_PD_USB4) && (get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) && is_vdo_present(cnt, VDO_INDEX_PTYPE_CABLE1)) { switch (cable[port].rev) { case PD_REV30: switch (cable[port].attr.p_rev30.ss) { case USB_R30_SS_U40_GEN3: case USB_R30_SS_U32_U40_GEN1: return true; case USB_R30_SS_U32_U40_GEN2: /* Check if DFP is Gen 3 capable */ if (IS_ENABLED(CONFIG_USB_PD_TBT_GEN3_CAPABLE)) return false; return true; default: disable_usb4_mode(port); return false; } case PD_REV20: switch (cable[port].attr.p_rev20.ss) { case USB_R20_SS_U31_GEN1_GEN2: /* Check if DFP is Gen 3 capable */ if (IS_ENABLED(CONFIG_USB_PD_TBT_GEN3_CAPABLE)) return false; return true; default: disable_usb4_mode(port); return false; } default: disable_usb4_mode(port); } } return false; } static bool is_usb4_vdo(int port, int cnt, uint32_t *payload) { enum idh_ptype ptype = PD_IDH_PTYPE(payload[VDO_I(PRODUCT)]); /* * Product types Hub and peripheral should use UFP product vdos * Reference Table 6-30 USB PD spec 3.2. */ if (ptype == IDH_PTYPE_HUB || ptype == IDH_PTYPE_PERIPH) { /* * Ref: USB Type-C Cable and Connector Specification * Figure 5-1 USB4 Discovery and Entry Flow Model * Device USB4 VDO detection. */ return IS_ENABLED(CONFIG_USB_PD_USB4) && is_vdo_present(cnt, VDO_INDEX_PTYPE_UFP1_VDO) && PD_PRODUCT_IS_USB4(payload[VDO_INDEX_PTYPE_UFP1_VDO]); } return false; } void pd_dfp_discovery_init(int port) { memset(&discovery[port], 0, sizeof(struct pd_discovery)); } static int dfp_discover_ident(uint32_t *payload) { payload[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_IDENT); return 1; } static int dfp_discover_svids(uint32_t *payload) { payload[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID); return 1; } /* * This function returns * True - If the THunderbolt cable speed is TBT_SS_TBT_GEN3 or * TBT_SS_U32_GEN1_GEN2 * False - Otherwise */ static bool check_tbt_cable_speed(int port) { return (cable[port].cable_mode_resp.tbt_cable_speed == TBT_SS_TBT_GEN3 || cable[port].cable_mode_resp.tbt_cable_speed == TBT_SS_U32_GEN1_GEN2); } struct pd_discovery *pd_get_am_discovery(int port) { return &discovery[port]; } /* Note: Enter mode flag is not needed by TCPMv1 */ void pd_set_dfp_enter_mode_flag(int port, bool set) { } struct pd_cable *pd_get_cable_attributes(int port) { return &cable[port]; } /* * Enter Thunderbolt-compatible mode * Reference: USB Type-C cable and connector specification, Release 2.0 * * This function fills the TBT3 objects in the payload and * returns the number of objects it has filled. */ static int enter_tbt_compat_mode(int port, uint32_t *payload) { union tbt_dev_mode_enter_cmd enter_dev_mode = {0}; /* Table F-12 TBT3 Cable Enter Mode Command */ payload[0] = pd_dfp_enter_mode(port, USB_VID_INTEL, 0) | VDO_SVDM_VERS(VDM_VER20); /* For TBT3 Cable Enter Mode Command, number of Objects is 1 */ if (is_transmit_msg_sop_prime(port) || is_transmit_msg_sop_prime_prime(port)) return 1; usb_mux_set_safe_mode(port); /* Table F-13 TBT3 Device Enter Mode Command */ enter_dev_mode.vendor_spec_b1 = cable[port].dev_mode_resp.vendor_spec_b1; enter_dev_mode.vendor_spec_b0 = cable[port].dev_mode_resp.vendor_spec_b0; enter_dev_mode.intel_spec_b0 = cable[port].dev_mode_resp.intel_spec_b0; enter_dev_mode.cable = get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE ? TBT_ENTER_PASSIVE_CABLE : TBT_ENTER_ACTIVE_CABLE; if (cable[port].cable_mode_resp.tbt_cable_speed == TBT_SS_TBT_GEN3) { enter_dev_mode.lsrx_comm = cable[port].cable_mode_resp.lsrx_comm; enter_dev_mode.retimer_type = cable[port].cable_mode_resp.retimer_type; enter_dev_mode.tbt_cable = cable[port].cable_mode_resp.tbt_cable; enter_dev_mode.tbt_rounded = cable[port].cable_mode_resp.tbt_rounded; enter_dev_mode.tbt_cable_speed = cable[port].cable_mode_resp.tbt_cable_speed; } else { enter_dev_mode.tbt_cable_speed = TBT_SS_U32_GEN1_GEN2; } enter_dev_mode.tbt_alt_mode = TBT_ALTERNATE_MODE; payload[1] = enter_dev_mode.raw_value; /* For TBT3 Device Enter Mode Command, number of Objects are 2 */ return 2; } /* Return the current cable speed received from Cable Discover Mode command */ __overridable enum tbt_compat_cable_speed board_get_max_tbt_speed(int port) { return cable[port].cable_mode_resp.tbt_cable_speed; } __overridable bool board_is_tbt_usb4_port(int port) { return true; } static int process_tbt_compat_discover_modes(int port, uint32_t *payload) { int rsize; enum tbt_compat_cable_speed max_tbt_speed; /* * For active cables, Enter mode: SOP', SOP'', SOP * Ref: USB Type-C Cable and Connector Specification, figure F-1: TBT3 * Discovery Flow and Section F.2.7 TBT3 Cable Enter Mode Command. */ if (is_transmit_msg_sop_prime(port)) { /* Store Discover Mode SOP' response */ cable[port].cable_mode_resp.raw_value = payload[1]; /* Cable does not have Intel SVID for Discover SVID */ if (is_limit_tbt_cable_speed(port)) cable[port].cable_mode_resp.tbt_cable_speed = TBT_SS_U32_GEN1_GEN2; max_tbt_speed = board_get_max_tbt_speed(port); if (cable[port].cable_mode_resp.tbt_cable_speed > max_tbt_speed) { cable[port].cable_mode_resp.tbt_cable_speed = max_tbt_speed; } /* * Enter Mode SOP' (Cable Enter Mode) and Enter USB SOP' is * skipped for passive cables. */ if (get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) disable_transmit_sop_prime(port); if (is_usb4_mode_enabled(port)) { /* * If Cable is not Thunderbolt Gen 3 * capable or Thunderbolt Gen1_Gen2 * capable, disable USB4 mode and * continue flow for * Thunderbolt-compatible mode */ if (check_tbt_cable_speed(port)) { enable_enter_usb4_mode(port); usb_mux_set_safe_mode(port); return 0; } disable_usb4_mode(port); } rsize = enter_tbt_compat_mode(port, payload); } else { /* Store Discover Mode SOP response */ cable[port].dev_mode_resp.raw_value = payload[1]; if (is_limit_tbt_cable_speed(port)) { /* * Passive cable has Nacked for Discover SVID. * No need to do Discover modes of cable. Assign the * cable discovery attributes and enter into device * Thunderbolt-compatible mode. */ cable[port].cable_mode_resp.tbt_cable_speed = (cable[port].rev == PD_REV30 && cable[port].attr.p_rev30.ss > USB_R30_SS_U32_U40_GEN2) ? TBT_SS_U32_GEN1_GEN2 : cable[port].attr.p_rev30.ss; rsize = enter_tbt_compat_mode(port, payload); } else { /* Discover modes for SOP' */ discovery[port].svid_idx--; rsize = dfp_discover_modes(port, payload); enable_transmit_sop_prime(port); } } return rsize; } /* * This function returns number of objects required to enter * Thunderbolt-Compatible mode i.e. * 2 - When SOP is enabled. * 1 - When SOP' or SOP'' is enabled. * 0 - Acknowledge. */ static int enter_mode_tbt_compat(int port, uint32_t *payload) { /* Enter mode SOP' for active cables */ if (is_transmit_msg_sop_prime(port)) { disable_transmit_sop_prime(port); /* Check if the cable has a SOP'' controller */ if (cable[port].attr.a_rev20.sop_p_p) enable_transmit_sop_prime_prime(port); return enter_tbt_compat_mode(port, payload); } /* Enter Mode SOP'' for active cables with SOP'' controller */ if (is_transmit_msg_sop_prime_prime(port)) { disable_transmit_sop_prime_prime(port); return enter_tbt_compat_mode(port, payload); } /* Update Mux state to Thunderbolt-compatible mode. */ set_tbt_compat_mode_ready(port); /* No response once device (and cable) acks */ return 0; } #endif /* CONFIG_USB_PD_ALT_MODE_DFP */ int pd_svdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload, uint16_t head) { int cmd = PD_VDO_CMD(payload[0]); int cmd_type = PD_VDO_CMDT(payload[0]); int (*func)(int port, uint32_t *payload) = NULL; int rsize = 1; /* VDM header at a minimum */ payload[0] &= ~VDO_CMDT_MASK; *rpayload = payload; if (cmd_type == CMDT_INIT) { switch (cmd) { case CMD_DISCOVER_IDENT: func = svdm_rsp.identity; break; case CMD_DISCOVER_SVID: func = svdm_rsp.svids; break; case CMD_DISCOVER_MODES: func = svdm_rsp.modes; break; case CMD_ENTER_MODE: func = svdm_rsp.enter_mode; break; case CMD_DP_STATUS: if (svdm_rsp.amode) func = svdm_rsp.amode->status; break; case CMD_DP_CONFIG: if (svdm_rsp.amode) func = svdm_rsp.amode->config; break; case CMD_EXIT_MODE: func = svdm_rsp.exit_mode; break; #ifdef CONFIG_USB_PD_ALT_MODE_DFP case CMD_ATTENTION: /* * attention is only SVDM with no response * (just goodCRC) return zero here. */ dfp_consume_attention(port, payload); return 0; #endif default: CPRINTF("ERR:CMD:%d\n", cmd); rsize = 0; } if (func) rsize = func(port, payload); else /* not supported : NACK it */ rsize = 0; if (rsize >= 1) payload[0] |= VDO_CMDT(CMDT_RSP_ACK); else if (!rsize) { payload[0] |= VDO_CMDT(CMDT_RSP_NAK); rsize = 1; } else { payload[0] |= VDO_CMDT(CMDT_RSP_BUSY); rsize = 1; } payload[0] |= VDO_SVDM_VERS(pd_get_vdo_ver(port, TCPC_TX_SOP)); } else if (cmd_type == CMDT_RSP_ACK) { #ifdef CONFIG_USB_PD_ALT_MODE_DFP struct svdm_amode_data *modep; modep = pd_get_amode_data(port, PD_VDO_VID(payload[0])); #endif switch (cmd) { #ifdef CONFIG_USB_PD_ALT_MODE_DFP case CMD_DISCOVER_IDENT: /* Received a SOP' Discover Ident msg */ if (is_transmit_msg_sop_prime(port)) { /* Store cable type */ dfp_consume_cable_response(port, cnt, payload, head); /* * Enter USB4 mode if the cable supports USB4 * operation and has USB4 VDO. */ if (is_usb4_mode_enabled(port) && is_cable_ready_to_enter_usb4(port, cnt)) { enable_enter_usb4_mode(port); usb_mux_set_safe_mode(port); disable_transmit_sop_prime(port); /* * To change the mode of operation from * USB4 the port needs to be * reconfigured. * Ref: USB Type-C Cable and Connectot * Specification section 5.4.4. * */ disable_tbt_compat_mode(port); rsize = 0; break; } /* * Disable Thunderbolt-compatible mode if the * cable does not support superspeed */ if (is_tbt_compat_enabled(port) && !is_tbt_cable_superspeed(port)) { disable_tbt_compat_mode(port); } rsize = dfp_discover_svids(payload); disable_transmit_sop_prime(port); /* Received a SOP Discover Ident Message */ } else if (IS_ENABLED(CONFIG_USB_PD_DECODE_SOP) && board_is_tbt_usb4_port(port)) { pd_dfp_discovery_init(port); dfp_consume_identity(port, cnt, payload); /* Enable USB4 mode if USB4 VDO present * and port partner supports USB Rev 3.0. */ if (is_usb4_vdo(port, cnt, payload) && PD_HEADER_REV(head) == PD_REV30) { enable_usb4_mode(port); } /* * Enable Thunderbolt-compatible mode * if the modal operation is supported */ if (is_modal(port, cnt, payload)) enable_tbt_compat_mode(port); if (is_modal(port, cnt, payload) || is_usb4_vdo(port, cnt, payload)) { rsize = dfp_discover_ident(payload); enable_transmit_sop_prime(port); } else { rsize = dfp_discover_svids(payload); } } else { pd_dfp_discovery_init(port); dfp_consume_identity(port, cnt, payload); rsize = dfp_discover_svids(payload); } #ifdef CONFIG_CHARGE_MANAGER if (pd_charge_from_device(pd_get_identity_vid(port), pd_get_identity_pid(port))) charge_manager_update_dualrole(port, CAP_DEDICATED); #endif break; case CMD_DISCOVER_SVID: { int prev_svid_cnt = discovery[port].svid_cnt; dfp_consume_svids(port, cnt, payload); /* * Ref: USB Type-C Cable and Connector Specification, * figure F-1: TBT3 Discovery Flow * * Check if 0x8087 is received for Discover SVID SOP. * If not, disable Thunderbolt-compatible mode * * If 0x8087 is not received for Discover SVID SOP' * limit to TBT passive Gen 2 cable */ if (is_tbt_compat_enabled(port)) { bool intel_svid = is_intel_svid(port, prev_svid_cnt); if (is_transmit_msg_sop_prime(port)) { if (!intel_svid) limit_tbt_cable_speed(port); } else if (intel_svid) { rsize = dfp_discover_svids(payload); enable_transmit_sop_prime(port); break; } else { disable_tbt_compat_mode(port); } } rsize = dfp_discover_modes(port, payload); disable_transmit_sop_prime(port); } break; case CMD_DISCOVER_MODES: dfp_consume_modes(port, cnt, payload); if (is_tbt_compat_enabled(port) && is_tbt_compat_mode(port, cnt, payload)) { rsize = process_tbt_compat_discover_modes( port, payload); break; } rsize = dfp_discover_modes(port, payload); /* enter the default mode for DFP */ if (!rsize) { /* * Disabling Thunderbolt-Compatible mode if * discover mode response doesn't include Intel * SVID. */ disable_tbt_compat_mode(port); payload[0] = pd_dfp_enter_mode(port, 0, 0); if (payload[0]) rsize = 1; } break; case CMD_ENTER_MODE: if (is_tbt_compat_enabled(port)) { rsize = enter_mode_tbt_compat(port, payload); /* * Continue with PD flow if Thunderbolt-compatible mode * is disabled. */ } else if (!modep) { rsize = 0; } else { if (!modep->opos) pd_dfp_enter_mode(port, 0, 0); if (modep->opos) { rsize = modep->fx->status(port, payload); payload[0] |= PD_VDO_OPOS(modep->opos); } } break; case CMD_DP_STATUS: /* DP status response & UFP's DP attention have same payload */ dfp_consume_attention(port, payload); if (modep && modep->opos) rsize = modep->fx->config(port, payload); else rsize = 0; break; case CMD_DP_CONFIG: if (modep && modep->opos && modep->fx->post_config) modep->fx->post_config(port); /* no response after DFPs ack */ rsize = 0; break; case CMD_EXIT_MODE: /* no response after DFPs ack */ rsize = 0; break; #endif case CMD_ATTENTION: /* no response after DFPs ack */ rsize = 0; break; default: CPRINTF("ERR:CMD:%d\n", cmd); rsize = 0; } payload[0] |= VDO_CMDT(CMDT_INIT); payload[0] |= VDO_SVDM_VERS(pd_get_vdo_ver(port, TCPC_TX_SOP)); #ifdef CONFIG_USB_PD_ALT_MODE_DFP } else if (cmd_type == CMDT_RSP_BUSY) { switch (cmd) { case CMD_DISCOVER_IDENT: case CMD_DISCOVER_SVID: case CMD_DISCOVER_MODES: /* resend if its discovery */ rsize = 1; break; case CMD_ENTER_MODE: /* Error */ CPRINTF("ERR:ENTBUSY\n"); rsize = 0; break; case CMD_EXIT_MODE: rsize = 0; break; default: rsize = 0; } } else if (cmd_type == CMDT_RSP_NAK) { /* Passive cable Nacked for Discover SVID */ if (cmd == CMD_DISCOVER_SVID && is_tbt_compat_enabled(port) && is_transmit_msg_sop_prime(port) && get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) { limit_tbt_cable_speed(port); rsize = dfp_discover_modes(port, payload); disable_transmit_sop_prime(port); } else { rsize = 0; } #endif /* CONFIG_USB_PD_ALT_MODE_DFP */ } else { CPRINTF("ERR:CMDT:%d\n", cmd); /* do not answer */ rsize = 0; } return rsize; } #else int pd_svdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload, uint16_t head) { return 0; } #endif /* CONFIG_USB_PD_ALT_MODE */ #define FW_RW_END (CONFIG_EC_WRITABLE_STORAGE_OFF + \ CONFIG_RW_STORAGE_OFF + CONFIG_RW_SIZE) uint8_t *flash_hash_rw(void) { static struct sha256_ctx ctx; /* re-calculate RW hash when changed as its time consuming */ if (rw_flash_changed) { rw_flash_changed = 0; SHA256_init(&ctx); SHA256_update(&ctx, (void *)CONFIG_PROGRAM_MEMORY_BASE + CONFIG_RW_MEM_OFF, CONFIG_RW_SIZE - RSANUMBYTES); return SHA256_final(&ctx); } else { return ctx.buf; } } void pd_get_info(uint32_t *info_data) { void *rw_hash = flash_hash_rw(); /* copy first 20 bytes of RW hash */ memcpy(info_data, rw_hash, 5 * sizeof(uint32_t)); /* copy other info into data msg */ #if defined(CONFIG_USB_PD_HW_DEV_ID_BOARD_MAJOR) && \ defined(CONFIG_USB_PD_HW_DEV_ID_BOARD_MINOR) info_data[5] = VDO_INFO(CONFIG_USB_PD_HW_DEV_ID_BOARD_MAJOR, CONFIG_USB_PD_HW_DEV_ID_BOARD_MINOR, ver_get_num_commits(system_get_image_copy()), (system_get_image_copy() != EC_IMAGE_RO)); #else info_data[5] = 0; #endif } int pd_custom_flash_vdm(int port, int cnt, uint32_t *payload) { static int flash_offset; int rsize = 1; /* default is just VDM header returned */ switch (PD_VDO_CMD(payload[0])) { case VDO_CMD_VERSION: memcpy(payload + 1, ¤t_image_data.version, 24); rsize = 7; break; case VDO_CMD_REBOOT: /* ensure the power supply is in a safe state */ pd_power_supply_reset(0); system_reset(0); break; case VDO_CMD_READ_INFO: /* copy info into response */ pd_get_info(payload + 1); rsize = 7; break; case VDO_CMD_FLASH_ERASE: /* do not kill the code under our feet */ if (system_get_image_copy() != EC_IMAGE_RO) break; pd_log_event(PD_EVENT_ACC_RW_ERASE, 0, 0, NULL); flash_offset = CONFIG_EC_WRITABLE_STORAGE_OFF + CONFIG_RW_STORAGE_OFF; flash_physical_erase(CONFIG_EC_WRITABLE_STORAGE_OFF + CONFIG_RW_STORAGE_OFF, CONFIG_RW_SIZE); rw_flash_changed = 1; break; case VDO_CMD_FLASH_WRITE: /* do not kill the code under our feet */ if ((system_get_image_copy() != EC_IMAGE_RO) || (flash_offset < CONFIG_EC_WRITABLE_STORAGE_OFF + CONFIG_RW_STORAGE_OFF)) break; flash_physical_write(flash_offset, 4*(cnt - 1), (const char *)(payload+1)); flash_offset += 4*(cnt - 1); rw_flash_changed = 1; break; case VDO_CMD_ERASE_SIG: /* this is not touching the code area */ { uint32_t zero = 0; int offset; /* zeroes the area containing the RSA signature */ for (offset = FW_RW_END - RSANUMBYTES; offset < FW_RW_END; offset += 4) flash_physical_write(offset, 4, (const char *)&zero); } break; default: /* Unknown : do not answer */ return 0; } return rsize; }