diff options
Diffstat (limited to 'common/usbc/tbt_alt_mode.c')
| -rw-r--r-- | common/usbc/tbt_alt_mode.c | 74 |
1 files changed, 31 insertions, 43 deletions
diff --git a/common/usbc/tbt_alt_mode.c b/common/usbc/tbt_alt_mode.c index eb64519c1e..5baf9d1a73 100644 --- a/common/usbc/tbt_alt_mode.c +++ b/common/usbc/tbt_alt_mode.c @@ -90,6 +90,8 @@ enum tbt_states { TBT_START = 0, TBT_ENTER_SOP, TBT_ACTIVE, + /* Set to force Exit mode from non-Active states */ + TBT_PREPARE_EXIT_MODE, TBT_EXIT_SOP, TBT_INACTIVE, /* Active cable only */ @@ -103,7 +105,6 @@ static enum tbt_states tbt_state[CONFIG_USB_PD_PORT_MAX_COUNT]; static const uint8_t state_vdm_cmd[TBT_STATE_COUNT] = { [TBT_ENTER_SOP] = CMD_ENTER_MODE, - [TBT_ACTIVE] = CMD_EXIT_MODE, [TBT_EXIT_SOP] = CMD_EXIT_MODE, /* Active cable only */ [TBT_ENTER_SOP_PRIME] = CMD_ENTER_MODE, @@ -299,27 +300,18 @@ void intel_vdm_acked(int port, enum tcpci_msg_type type, int vdo_count, /* Indicate to PE layer that alt mode is active */ pd_set_dfp_enter_mode_flag(port, true); break; - case TBT_ACTIVE: + case TBT_EXIT_SOP: tbt_prints("exit mode SOP", port); opos_sop = pd_alt_mode(port, TCPCI_MSG_SOP, USB_VID_INTEL); /* Clear Thunderbolt related signals */ - pd_dfp_exit_mode(port, TCPCI_MSG_SOP, USB_VID_INTEL, opos_sop); - set_usb_mux_with_current_data_role(port); + if (opos_sop > 0) + pd_dfp_exit_mode(port, TCPCI_MSG_SOP, USB_VID_INTEL, + opos_sop); if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) { tbt_active_cable_exit_mode(port); } else { - /* - * Exit Mode process is complete; go to inactive state. - */ - tbt_exit_done(port); - } - break; - case TBT_EXIT_SOP: - set_usb_mux_with_current_data_role(port); - if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) - tbt_active_cable_exit_mode(port); - else { + set_usb_mux_with_current_data_role(port); if (TBT_CHK_FLAG(port, TBT_FLAG_RETRY_DONE)) /* retried enter mode, still failed, give up */ tbt_exit_done(port); @@ -330,7 +322,6 @@ void intel_vdm_acked(int port, enum tcpci_msg_type type, int vdo_count, case TBT_EXIT_SOP_PRIME_PRIME: tbt_prints("exit mode SOP''", port); tbt_state[port] = TBT_EXIT_SOP_PRIME; - set_usb_mux_with_current_data_role(port); break; case TBT_EXIT_SOP_PRIME: tbt_prints("exit mode SOP'", port); @@ -382,26 +373,15 @@ void intel_vdm_naked(int port, enum tcpci_msg_type type, uint8_t vdm_cmd) * so request to exit the mode first before retrying the enter * command. This can happen if the EC is restarted */ - tbt_state[port] = TBT_EXIT_SOP; - break; - case TBT_ACTIVE: - /* Exit SOP got NAK'ed */ - set_usb_mux_with_current_data_role(port); - if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) - tbt_active_cable_exit_mode(port); - else { - tbt_prints("exit mode SOP failed", port); - tbt_state[port] = TBT_INACTIVE; - TBT_CLR_FLAG(port, TBT_FLAG_RETRY_DONE); - } + tbt_state[port] = TBT_PREPARE_EXIT_MODE; break; case TBT_EXIT_SOP: /* Exit SOP got NAK'ed */ tbt_prints("exit mode SOP failed", port); - set_usb_mux_with_current_data_role(port); if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) tbt_active_cable_exit_mode(port); else { + set_usb_mux_with_current_data_role(port); if (TBT_CHK_FLAG(port, TBT_FLAG_RETRY_DONE)) /* Retried enter mode, still failed, give up */ tbt_exit_done(port); @@ -410,7 +390,6 @@ void intel_vdm_naked(int port, enum tcpci_msg_type type, uint8_t vdm_cmd) } break; case TBT_EXIT_SOP_PRIME_PRIME: - set_usb_mux_with_current_data_role(port); tbt_prints("exit mode SOP'' failed", port); tbt_state[port] = TBT_EXIT_SOP_PRIME; break; @@ -481,23 +460,26 @@ enum dpm_msg_setup_status tbt_setup_next_vdm(int port, int *vdo_count, else tbt_prints("retry to enter mode", port); + /* + * Enter safe mode before sending Enter mode SOP/SOP'/SOP'' + * Ref: Tiger Lake Platform PD Controller Interface + * Requirements for Integrated USB C, section A.1.2 TBT as DFP. + */ + usb_mux_set_safe_mode(port); + cable_mode_resp.raw_value = pd_get_tbt_mode_vdo(port, TCPCI_MSG_SOP_PRIME); /* Active cable and LRD cables send Enter Mode SOP' first */ if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE || cable_mode_resp.tbt_active_passive == TBT_CABLE_ACTIVE) { - vdo_count_ret = enter_tbt_compat_mode(port, - TCPCI_MSG_SOP_PRIME, vdm); - *tx_type = TCPCI_MSG_SOP_PRIME; tbt_state[port] = TBT_ENTER_SOP_PRIME; } else { /* Passive cable send Enter Mode SOP */ - vdo_count_ret = - enter_tbt_compat_mode(port, TCPCI_MSG_SOP, vdm); tbt_state[port] = TBT_ENTER_SOP; } - break; + + return MSG_SETUP_MUX_WAIT; case TBT_ENTER_SOP_PRIME: vdo_count_ret = enter_tbt_compat_mode(port, TCPCI_MSG_SOP_PRIME, vdm); @@ -513,21 +495,31 @@ enum dpm_msg_setup_status tbt_setup_next_vdm(int port, int *vdo_count, vdo_count_ret = enter_tbt_compat_mode(port, TCPCI_MSG_SOP, vdm); break; - case TBT_EXIT_SOP: case TBT_ACTIVE: /* + * Since we had successfully entered mode, consider ourselves + * done with any retires. + */ + TBT_SET_FLAG(port, TBT_FLAG_RETRY_DONE); + /* Fall through */ + case TBT_PREPARE_EXIT_MODE: + /* * Called to exit Thunderbolt alt mode, either when the mode is * active and the system is shutting down, or when an initial * request to enter the mode is NAK'ed. This can happen if EC * is restarted while Thunderbolt mode is active. */ + usb_mux_set_safe_mode_exit(port); + + tbt_state[port] = TBT_EXIT_SOP; + return MSG_SETUP_MUX_WAIT; + case TBT_EXIT_SOP: + /* DPM will only call this after safe state set is done */ modep = pd_get_amode_data(port, TCPCI_MSG_SOP, USB_VID_INTEL); if (!(modep && modep->opos)) return MSG_SETUP_ERROR; - usb_mux_set_safe_mode_exit(port); - vdm[0] = VDO(USB_VID_INTEL, 1, CMD_EXIT_MODE) | VDO_OPOS(modep->opos) | VDO_CMDT(CMDT_INIT) | @@ -541,8 +533,6 @@ enum dpm_msg_setup_status tbt_setup_next_vdm(int port, int *vdo_count, if (!(modep && modep->opos)) return MSG_SETUP_ERROR; - usb_mux_set_safe_mode_exit(port); - vdm[0] = VDO(USB_VID_INTEL, 1, CMD_EXIT_MODE) | VDO_OPOS(modep->opos) | VDO_CMDT(CMDT_INIT) | @@ -557,8 +547,6 @@ enum dpm_msg_setup_status tbt_setup_next_vdm(int port, int *vdo_count, if (!(modep && modep->opos)) return MSG_SETUP_ERROR; - usb_mux_set_safe_mode_exit(port); - vdm[0] = VDO(USB_VID_INTEL, 1, CMD_EXIT_MODE) | VDO_OPOS(modep->opos) | VDO_CMDT(CMDT_INIT) | |