diff options
Diffstat (limited to 'common/usbc/usb_mode.c')
| -rw-r--r-- | common/usbc/usb_mode.c | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/common/usbc/usb_mode.c b/common/usbc/usb_mode.c deleted file mode 100644 index b9dc4973bc..0000000000 --- a/common/usbc/usb_mode.c +++ /dev/null @@ -1,311 +0,0 @@ -/* Copyright 2020 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. - */ - -/* - * USB4 mode support - * Refer USB Type-C Cable and Connector Specification Release 2.0 Section 5 and - * USB Power Delivery Specification Revision 3.0, Version 2.0 Section 6.4.8 - */ - -#include <stdbool.h> -#include <stdint.h> -#include "compile_time_macros.h" -#include "console.h" -#include "tcpm/tcpm.h" -#include "usb_common.h" -#include "usb_mode.h" -#include "usb_mux.h" -#include "usb_pd.h" -#include "usb_pd_dpm.h" -#include "usb_pd_tcpm.h" -#include "usb_pe_sm.h" -#include "usbc_ppc.h" - -#ifdef CONFIG_COMMON_RUNTIME -#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args) -#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) -#else -#define CPRINTF(format, args...) -#define CPRINTS(format, args...) -#endif - -enum usb4_mode_status { - USB4_MODE_FAILURE, - USB4_MODE_SUCCESS, -}; - -enum usb4_states { - USB4_START, - USB4_ENTER_SOP, - USB4_ENTER_SOP_PRIME, - USB4_ENTER_SOP_PRIME_PRIME, - USB4_ACTIVE, - USB4_INACTIVE, - USB4_STATE_COUNT, -}; - -/* - * USB4 PD flow: - * - * Cable type - * | - * |-------- Passive ---|---- Active -----| - * | | - * USB Highest Speed Structured VDM version - * | (cable revision)-- <2.0---->| - * --------|--------|------| | | - * | | | | >=2.0 | - * >=Gen3 Gen2 Gen1 USB2.0 | | - * | | | | VDO version--- <1.3 ---> Modal op? -- N --| - * Enter USB | | | (B21:23 of | | - * SOP with | | | Discover ID SOP'- y | - * Gen3 cable | | Skip Active cable VDO1) | | - * speed | | USB4 | TBT SVID? -- N --| - * | | mode >=1.3 | | - * Is modal op? | entry | y | - * | | Cable USB4 - N | | - * y | support? | Gen4 cable? - N - Skip - * | | | Skip USB4 | USB4 - * Is TBT SVID? -N- Enter | mode entry | mode - * | USB4 SOP | | entry - * y with Gen2 y | - * | cable speed | | - * | | | - * Is Discover mode | | - * SOP' B25? - N - Enter Enter USB4 mode | - * | USB4 SOP (SOP, SOP', SOP'') | - * | with speed | - * y from TBT mode | - * | SOP' VDO | - * | |<-- NAK -- Enter mode TBT SOP'<---| - * |---->Enter TBT SOP'-------NAK------>| | | | - * | | | | ACK | - * | ACK | | | | - * | | | |<-- NAK -- Enter mode TBT SOP'' | - * | Enter USB4 SOP | | | | - * | with speed from Exit TBT mode SOP ACK | - * | TBT mode SOP' VDO | | | | - * | ACK/NAK Enter USB4 SOP | - * | | | with speed from | - * | Exit TBT mode SOP'' TBT mode SOP' VDO | - * | | | | - * | ACK/NAK | - * | | | | - * | Exit TBT mode SOP' | - * | | | | - * | ACK/NAK | - * | | | | - * |---- N ----Retry done? -------------| |--------Retry done? ---- N -------| - * | | - * y y - * | | - * Skip USB4 mode entry Skip USB4 mode entry - */ - -static enum usb4_states usb4_state[CONFIG_USB_PD_PORT_MAX_COUNT]; - -static void usb4_debug_prints(int port, enum usb4_mode_status usb4_status) -{ - CPRINTS("C%d: USB4: State:%d Status:%d", port, usb4_state[port], - usb4_status); -} - -bool enter_usb_entry_is_done(int port) -{ - return usb4_state[port] == USB4_ACTIVE || - usb4_state[port] == USB4_INACTIVE; -} - -void usb4_exit_mode_request(int port) -{ - usb4_state[port] = USB4_START; - usb_mux_set_safe_mode_exit(port); - set_usb_mux_with_current_data_role(port); -} - -void enter_usb_init(int port) -{ - usb4_state[port] = USB4_START; -} - -void enter_usb_failed(int port) -{ - /* - * Since Enter USB sets the mux state to SAFE mode, fall back - * to USB mode on receiving a NAK. - */ - usb_mux_set(port, USB_PD_MUX_USB_ENABLED, USB_SWITCH_CONNECT, - polarity_rm_dts(pd_get_polarity(port))); - - usb4_debug_prints(port, USB4_MODE_FAILURE); - usb4_state[port] = USB4_INACTIVE; -} - -static bool enter_usb_response_valid(int port, enum tcpci_msg_type type) -{ - /* - * Check for an unexpected response. - */ - if (get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE && - type != TCPCI_MSG_SOP) { - enter_usb_failed(port); - return false; - } - return true; -} - -bool enter_usb_port_partner_is_capable(int port) -{ - const struct pd_discovery *disc = - pd_get_am_discovery(port, TCPCI_MSG_SOP); - - if (usb4_state[port] == USB4_INACTIVE) - return false; - - if (!PD_PRODUCT_IS_USB4(disc->identity.product_t1.raw_value)) - return false; - - return true; -} - -bool enter_usb_cable_is_capable(int port) -{ - if (get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) { - if (get_usb4_cable_speed(port) < USB_R30_SS_U32_U40_GEN1) - return false; - } else if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) { - const struct pd_discovery *disc_sop_prime = - pd_get_am_discovery(port, TCPCI_MSG_SOP_PRIME); - - if (pd_get_vdo_ver(port, TCPCI_MSG_SOP_PRIME) >= VDM_VER20 && - disc_sop_prime->identity.product_t1.a_rev30.vdo_ver >= - VDO_VERSION_1_3) { - union active_cable_vdo2_rev30 a2_rev30 = - disc_sop_prime->identity.product_t2.a2_rev30; - /* - * For VDM version >= 2.0 and VD0 version is >= 1.3, - * do not enter USB4 mode if the cable isn't USB4 - * capable. - */ - if (a2_rev30.usb_40_support == USB4_NOT_SUPPORTED) - return false; - /* - * For VDM version < 2.0 or VDO version < 1.3, do not enter USB4 - * mode if the cable - - * doesn't support modal operation or - * doesn't support Intel SVID or - * doesn't have rounded support. - */ - } else { - const struct pd_discovery *disc = - pd_get_am_discovery(port, TCPCI_MSG_SOP); - union tbt_mode_resp_cable cable_mode_resp = { - .raw_value = pd_get_tbt_mode_vdo(port, - TCPCI_MSG_SOP_PRIME) }; - - if (!disc->identity.idh.modal_support || - !pd_is_mode_discovered_for_svid(port, - TCPCI_MSG_SOP_PRIME, USB_VID_INTEL) || - cable_mode_resp.tbt_rounded != - TBT_GEN3_GEN4_ROUNDED_NON_ROUNDED) - return false; - } - } else { - /* Not Emark cable */ - return false; - } - - return true; -} - -void enter_usb_accepted(int port, enum tcpci_msg_type type) -{ - const struct pd_discovery *disc; - - if (!enter_usb_response_valid(port, type)) - return; - - switch (usb4_state[port]) { - case USB4_ENTER_SOP_PRIME: - disc = pd_get_am_discovery(port, TCPCI_MSG_SOP_PRIME); - if (disc->identity.product_t1.a_rev20.sop_p_p) - usb4_state[port] = USB4_ENTER_SOP_PRIME_PRIME; - else - usb4_state[port] = USB4_ENTER_SOP; - break; - case USB4_ENTER_SOP_PRIME_PRIME: - usb4_state[port] = USB4_ENTER_SOP; - break; - case USB4_ENTER_SOP: - /* Connect the SBU and USB lines to the connector */ - if (IS_ENABLED(CONFIG_USBC_PPC_SBU)) - ppc_set_sbu(port, 1); - - usb4_state[port] = USB4_ACTIVE; - - /* Set usb mux to USB4 mode */ - usb_mux_set(port, USB_PD_MUX_USB4_ENABLED, USB_SWITCH_CONNECT, - polarity_rm_dts(pd_get_polarity(port))); - - usb4_debug_prints(port, USB4_MODE_SUCCESS); - break; - case USB4_ACTIVE: - break; - default: - enter_usb_failed(port); - } -} - -void enter_usb_rejected(int port, enum tcpci_msg_type type) -{ - if (!enter_usb_response_valid(port, type) || - usb4_state[port] == USB4_ACTIVE) - return; - - enter_usb_failed(port); -} - -uint32_t enter_usb_setup_next_msg(int port, enum tcpci_msg_type *type) -{ - const struct pd_discovery *disc_sop_prime; - - switch (usb4_state[port]) { - case USB4_START: - disc_sop_prime = pd_get_am_discovery(port, TCPCI_MSG_SOP_PRIME); - /* - * Ref: Tiger Lake Platform PD Controller Interface Requirements - * for Integrated USBC, section A.2.2: USB4 as DFP. - * Enter safe mode before sending Enter USB SOP/SOP'/SOP'' - * TODO (b/156749387): Remove once data reset feature is in - * place. - */ - usb_mux_set_safe_mode(port); - - if (pd_get_vdo_ver(port, TCPCI_MSG_SOP_PRIME) < VDM_VER20 || - disc_sop_prime->identity.product_t1.a_rev30.vdo_ver < - VDO_VERSION_1_3 || - get_usb_pd_cable_type(port) == IDH_PTYPE_PCABLE) { - usb4_state[port] = USB4_ENTER_SOP; - } else { - usb4_state[port] = USB4_ENTER_SOP_PRIME; - *type = TCPCI_MSG_SOP_PRIME; - } - break; - case USB4_ENTER_SOP_PRIME: - *type = TCPCI_MSG_SOP_PRIME; - break; - case USB4_ENTER_SOP_PRIME_PRIME: - *type = TCPCI_MSG_SOP_PRIME_PRIME; - break; - case USB4_ENTER_SOP: - *type = TCPCI_MSG_SOP; - break; - case USB4_ACTIVE: - return -1; - default: - return 0; - } - return get_enter_usb_msg_payload(port); -} |