From patchwork Thu Dec 7 09:07:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: RD Babiera X-Patchwork-Id: 13483016 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="QTolsXGw" Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1FEF1D5C for ; Thu, 7 Dec 2023 01:08:05 -0800 (PST) Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1d053953954so4850455ad.2 for ; Thu, 07 Dec 2023 01:08:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1701940084; x=1702544884; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=0ee9+vLb9jHxLxxtSEpDCi2PEBtLJvw/yxQpz8RWhRI=; b=QTolsXGwR37l69xAbt4L+irg1NTixnJz/dMqEejHRAauEBI2hLybM36OiAPGtgwxMG 4tm8/IKjKXGGVz7EVZ9ZYzBs9/osLQ79Y+l7YanoUHGn0xUDdi1GeKZ/JvoZ22lyjNeD K/jal3VPSPNLmT1RH+vQVIbqQhF1JwXcfap9/WoNjTwA2ic/2utqcJ3pPKfrfQTByFWY v+hjO+5gMV8RJGvuazoW5I9YdbJO2ZHHsc1w8oxHntqeDVdN+3ATt81TUc2LmZgVLPJQ c5qh4YiHQhBDBe4y6YOVyHm8w0F0Sjy08on+VKCLIMKyu6OdeLi03ibxU2dzVshXYYv2 tnOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701940084; x=1702544884; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=0ee9+vLb9jHxLxxtSEpDCi2PEBtLJvw/yxQpz8RWhRI=; b=fVeHZivh5aMNR3pmvqlNvJX78XxYzbTm1Fek1GVrMO+etT/1qmYhN8nDFi2N3z3UiW CDflzitfq4+VCgEEcld06wiFTMWfW6ObwZNjLbVienYAjtfmV+zt0OstuQKsjSLxYaDk M5t6cbE0SqYimPzjnC+X6bm/2kRtg5qQ+1Cc14ZawhG48zXoPpIOmo47AKT08gIyaujW b2eP3t7C6SAOx9CREpKMtgxXjH/f1eopFQ6r95U6x1T/I8nnCD+4G9KSmvG4a3qN73YZ hScX1QPrBCopHGax7lmAbN6VBg9GX9Pa6Tf0cFoaDu8fZOPFxHCvysczzrtUd6YcxEkT y0Lw== X-Gm-Message-State: AOJu0YyAoM6mvIekhY/3dVVz1oLcXvbidvCgg0qQq3/TlBfbZBYLH0ri wfJC29vA5MxR4fz3l2Pz9VBMZniZKiV+1S4= X-Google-Smtp-Source: AGHT+IE144gbtvb/3pDM6DkUh1Jq1aglFiSsnUUvihpi0/LENYXSfNd9IxT6JKSeI29VryIJPTPqdtWONXT5+BI= X-Received: from rdbabiera.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:18a8]) (user=rdbabiera job=sendgmr) by 2002:a17:902:dac5:b0:1d0:b595:4ea4 with SMTP id q5-20020a170902dac500b001d0b5954ea4mr28890plx.4.1701940084535; Thu, 07 Dec 2023 01:08:04 -0800 (PST) Date: Thu, 7 Dec 2023 09:07:35 +0000 In-Reply-To: <20231207090738.15721-12-rdbabiera@google.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20231207090738.15721-12-rdbabiera@google.com> X-Developer-Key: i=rdbabiera@google.com; a=openpgp; fpr=639A331F1A21D691815CE090416E17CA2BBBD5C8 X-Developer-Signature: v=1; a=openpgp-sha256; l=14654; i=rdbabiera@google.com; h=from:subject; bh=uzf9MVQzNy9YwxgF5wuGq6Gnc3qD0Q+pL2//fBHt9Rk=; b=owGbwMvMwCFW0bfok0KS4TbG02pJDKmF3TGiRywSvAMPy0/96KceIsW3xv3bDK9Hfwsv/p60P UDzyzOhjlIWBjEOBlkxRRZd/zyDG1dSt8zhrDGGmcPKBDKEgYtTACZy+zcjwzW+cgtrYa9VensW MZpOKOtMuV15N+irlHxfctkpcadbMxj+O23Zwtw0+7vxdv7E6z9fVac9+WUUNUMs5tYMRVv+NKf fnAA= X-Mailer: git-send-email 2.43.0.rc2.451.g8631bc7472-goog Message-ID: <20231207090738.15721-16-rdbabiera@google.com> Subject: [PATCH v1 04/10] usb: typec: tcpm: add control message support for SOP' From: RD Babiera To: heikki.krogerus@linux.intel.com, linux@roeck-us.net, gregkh@linuxfoundation.org, pmalani@chromium.org, bleung@chromium.org, chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Cc: badhri@google.com, tzungbi@kernel.org, utkarsh.h.patel@intel.com, andriy.shevchenko@linux.intel.com, RD Babiera Add tx_sop_type to tcpm_pd_send_control and rx_sop_type to tcpm_pd_ctrl_request. TCPC_TX_SOP is added to all pd_send_control calls, with the exception of TCPC_TX_SOP_PRIME being added to pd_send_control for a SOFT_RESET message sent after a Vconn swap that makes the port the Vconn source. After the SOFT_RESET is accepted, tcpm_pd_ctrl_request resets the proper protocol layer depending on the rx_sop_type. VCONN_SWAP_TURN_ON_VCONN redirects to a new state, VCONN_SWAP_SEND_SOFT_RESET. This state sends SOFT_RESET over SOP' before transitioning to the ready state if applicable. Signed-off-by: RD Babiera --- drivers/usb/typec/tcpm/tcpm.c | 159 ++++++++++++++++++++++++---------- include/linux/usb/pd.h | 1 + 2 files changed, 115 insertions(+), 45 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 313928f93d0c..d1c6157a2ea3 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -108,6 +108,7 @@ S(VCONN_SWAP_WAIT_FOR_VCONN), \ S(VCONN_SWAP_TURN_ON_VCONN), \ S(VCONN_SWAP_TURN_OFF_VCONN), \ + S(VCONN_SWAP_SEND_SOFT_RESET), \ \ S(FR_SWAP_SEND), \ S(FR_SWAP_SEND_TIMEOUT), \ @@ -2391,7 +2392,8 @@ static inline enum tcpm_state ready_state(struct tcpm_port *port) } static int tcpm_pd_send_control(struct tcpm_port *port, - enum pd_ctrl_msg_type type); + enum pd_ctrl_msg_type type, + enum tcpm_transmit_type tx_sop_type); static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, int cnt) @@ -2745,10 +2747,12 @@ static void tcpm_pps_complete(struct tcpm_port *port, int result) } static void tcpm_pd_ctrl_request(struct tcpm_port *port, - const struct pd_message *msg) + const struct pd_message *msg, + enum tcpm_transmit_type rx_sop_type) { enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); enum tcpm_state next_state; + unsigned int rev = pd_header_rev_le(msg->header); /* * Stop VDM state machine if interrupted by other Messages while NOT_SUPP is allowed in @@ -2913,6 +2917,16 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, case SOFT_RESET_SEND: if (port->ams == SOFT_RESET_AMS) tcpm_ams_finish(port); + /* + * SOP' Soft Reset is done after Vconn Swap, + * which returns to ready state + */ + if (rx_sop_type == TCPC_TX_SOP_PRIME) { + if (rev < port->negotiated_rev_prime) + port->negotiated_rev_prime = rev; + tcpm_set_state(port, ready_state(port), 0); + break; + } if (port->pwr_role == TYPEC_SOURCE) { port->upcoming_state = SRC_SEND_CAPABILITIES; tcpm_ams_start(port, POWER_NEGOTIATION); @@ -3112,8 +3126,7 @@ static void tcpm_pd_rx_handler(struct kthread_work *work) if (msgid == port->rx_msgid_prime) goto done; port->rx_msgid_prime = msgid; - /* For now, don't do anything with SOP' Messages */ - goto done; + break; case TCPC_TX_SOP: if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) @@ -3143,7 +3156,7 @@ static void tcpm_pd_rx_handler(struct kthread_work *work) else if (cnt) tcpm_pd_data_request(port, msg); else - tcpm_pd_ctrl_request(port, msg); + tcpm_pd_ctrl_request(port, msg, rx_sop_type); } } @@ -3170,17 +3183,40 @@ void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg, EXPORT_SYMBOL_GPL(tcpm_pd_receive); static int tcpm_pd_send_control(struct tcpm_port *port, - enum pd_ctrl_msg_type type) + enum pd_ctrl_msg_type type, + enum tcpm_transmit_type tx_sop_type) { struct pd_message msg; memset(&msg, 0, sizeof(msg)); - msg.header = PD_HEADER_LE(type, port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 0); + switch (tx_sop_type) { + case TCPC_TX_SOP_PRIME: + msg.header = PD_HEADER_LE(type, + 0, /* Cable Plug Indicator for DFP/UFP */ + 0, /* Reserved */ + port->negotiated_rev, + port->message_id_prime, + 0); + break; + case TCPC_TX_SOP: + msg.header = PD_HEADER_LE(type, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + 0); + break; + default: + msg.header = PD_HEADER_LE(type, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + 0); + break; + } - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); + return tcpm_pd_transmit(port, tx_sop_type, &msg); } /* @@ -3199,13 +3235,13 @@ static bool tcpm_send_queued_message(struct tcpm_port *port) switch (queued_message) { case PD_MSG_CTRL_WAIT: - tcpm_pd_send_control(port, PD_CTRL_WAIT); + tcpm_pd_send_control(port, PD_CTRL_WAIT, TCPC_TX_SOP); break; case PD_MSG_CTRL_REJECT: - tcpm_pd_send_control(port, PD_CTRL_REJECT); + tcpm_pd_send_control(port, PD_CTRL_REJECT, TCPC_TX_SOP); break; case PD_MSG_CTRL_NOT_SUPP: - tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); + tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP, TCPC_TX_SOP); break; case PD_MSG_DATA_SINK_CAP: ret = tcpm_pd_send_sink_caps(port); @@ -4220,7 +4256,7 @@ static void run_state_machine(struct tcpm_port *port) case SRC_NEGOTIATE_CAPABILITIES: ret = tcpm_pd_check_request(port); if (ret < 0) { - tcpm_pd_send_control(port, PD_CTRL_REJECT); + tcpm_pd_send_control(port, PD_CTRL_REJECT, TCPC_TX_SOP); if (!port->explicit_contract) { tcpm_set_state(port, SRC_WAIT_NEW_CAPABILITIES, 0); @@ -4228,7 +4264,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, SRC_READY, 0); } } else { - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); tcpm_set_partner_usb_comm_capable(port, !!(port->sink_request & RDO_USB_COMM)); tcpm_set_state(port, SRC_TRANSITION_SUPPLY, @@ -4237,7 +4273,7 @@ static void run_state_machine(struct tcpm_port *port) break; case SRC_TRANSITION_SUPPLY: /* XXX: regulator_set_voltage(vbus, ...) */ - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); + tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); port->explicit_contract = true; typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); port->pwr_opmode = TYPEC_PWR_MODE_PD; @@ -4721,7 +4757,7 @@ static void run_state_machine(struct tcpm_port *port) /* remove existing capabilities */ usb_power_delivery_unregister_capabilities(port->partner_source_caps); port->partner_source_caps = NULL; - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); tcpm_ams_finish(port); if (port->pwr_role == TYPEC_SOURCE) { port->upcoming_state = SRC_SEND_CAPABILITIES; @@ -4738,28 +4774,41 @@ static void run_state_machine(struct tcpm_port *port) tcpm_ams_start(port, SOFT_RESET_AMS); break; case SOFT_RESET_SEND: - port->message_id = 0; - port->rx_msgid = -1; - /* remove existing capabilities */ - usb_power_delivery_unregister_capabilities(port->partner_source_caps); - port->partner_source_caps = NULL; - if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET)) - tcpm_set_state_cond(port, hard_reset_state(port), 0); - else - tcpm_set_state_cond(port, hard_reset_state(port), - PD_T_SENDER_RESPONSE); + /* + * Power Delivery 3.0 Section 6.3.13 + * + * A Soft_Reset Message Shall be targeted at a specific entity + * depending on the type of SOP* packet used. + */ + if (port->tx_sop_type == TCPC_TX_SOP_PRIME) { + port->message_id_prime = 0; + port->rx_msgid_prime = -1; + tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET, TCPC_TX_SOP_PRIME); + tcpm_set_state_cond(port, ready_state(port), PD_T_SENDER_RESPONSE); + } else { + port->message_id = 0; + port->rx_msgid = -1; + /* remove existing capabilities */ + usb_power_delivery_unregister_capabilities(port->partner_source_caps); + port->partner_source_caps = NULL; + if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET, TCPC_TX_SOP)) + tcpm_set_state_cond(port, hard_reset_state(port), 0); + else + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + } break; /* DR_Swap states */ case DR_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_DR_SWAP); + tcpm_pd_send_control(port, PD_CTRL_DR_SWAP, TCPC_TX_SOP); if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20) port->send_discover = true; tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); break; case DR_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20) port->send_discover = true; tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0); @@ -4783,7 +4832,7 @@ static void run_state_machine(struct tcpm_port *port) break; case FR_SWAP_SEND: - if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP)) { + if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP, TCPC_TX_SOP)) { tcpm_set_state(port, ERROR_RECOVERY, 0); break; } @@ -4803,7 +4852,7 @@ static void run_state_machine(struct tcpm_port *port) break; case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED: tcpm_set_pwr_role(port, TYPEC_SOURCE); - if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) { + if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP)) { tcpm_set_state(port, ERROR_RECOVERY, 0); break; } @@ -4813,11 +4862,11 @@ static void run_state_machine(struct tcpm_port *port) /* PR_Swap states */ case PR_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); tcpm_set_state(port, PR_SWAP_START, 0); break; case PR_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_PR_SWAP); + tcpm_pd_send_control(port, PD_CTRL_PR_SWAP, TCPC_TX_SOP); tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); break; @@ -4859,7 +4908,7 @@ static void run_state_machine(struct tcpm_port *port) * supply is turned off" */ tcpm_set_pwr_role(port, TYPEC_SINK); - if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) { + if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP)) { tcpm_set_state(port, ERROR_RECOVERY, 0); break; } @@ -4906,17 +4955,17 @@ static void run_state_machine(struct tcpm_port *port) * Source." */ tcpm_set_pwr_role(port, TYPEC_SOURCE); - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); + tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START); break; case VCONN_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); tcpm_ams_finish(port); tcpm_set_state(port, VCONN_SWAP_START, 0); break; case VCONN_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP); + tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP, TCPC_TX_SOP); tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); break; @@ -4935,14 +4984,34 @@ static void run_state_machine(struct tcpm_port *port) PD_T_VCONN_SOURCE_ON); break; case VCONN_SWAP_TURN_ON_VCONN: - tcpm_set_vconn(port, true); - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); - tcpm_set_state(port, ready_state(port), 0); + ret = tcpm_set_vconn(port, true); + tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); + /* + * USB PD 3.0 Section 6.4.4.3.1 + * + * Note that a Cable Plug or VPD will not be ready for PD + * Communication until tVCONNStable after VCONN has been applied + */ + if (!ret) + tcpm_set_state(port, VCONN_SWAP_SEND_SOFT_RESET, + PD_T_VCONN_STABLE); + else + tcpm_set_state(port, ready_state(port), 0); break; case VCONN_SWAP_TURN_OFF_VCONN: tcpm_set_vconn(port, false); tcpm_set_state(port, ready_state(port), 0); break; + case VCONN_SWAP_SEND_SOFT_RESET: + tcpm_swap_complete(port, port->swap_status); + if (tcpm_can_communicate_sop_prime(port)) { + port->tx_sop_type = TCPC_TX_SOP_PRIME; + port->upcoming_state = SOFT_RESET_SEND; + tcpm_ams_start(port, SOFT_RESET_AMS); + } else { + tcpm_set_state(port, ready_state(port), 0); + } + break; case DR_SWAP_CANCEL: case PR_SWAP_CANCEL: @@ -4978,7 +5047,7 @@ static void run_state_machine(struct tcpm_port *port) } break; case GET_STATUS_SEND: - tcpm_pd_send_control(port, PD_CTRL_GET_STATUS); + tcpm_pd_send_control(port, PD_CTRL_GET_STATUS, TCPC_TX_SOP); tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); break; @@ -4986,7 +5055,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ready_state(port), 0); break; case GET_PPS_STATUS_SEND: - tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS); + tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS, TCPC_TX_SOP); tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); break; @@ -4994,7 +5063,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ready_state(port), 0); break; case GET_SINK_CAP: - tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP); + tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP, TCPC_TX_SOP); tcpm_set_state(port, GET_SINK_CAP_TIMEOUT, PD_T_SENDER_RESPONSE); break; case GET_SINK_CAP_TIMEOUT: @@ -5034,7 +5103,7 @@ static void run_state_machine(struct tcpm_port *port) /* Chunk state */ case CHUNK_NOT_SUPP: - tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); + tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP, TCPC_TX_SOP); tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? SRC_READY : SNK_READY, 0); break; default: diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h index eb626af0e4e7..d50098fb16b5 100644 --- a/include/linux/usb/pd.h +++ b/include/linux/usb/pd.h @@ -483,6 +483,7 @@ static inline unsigned int rdo_max_power(u32 rdo) #define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */ #define PD_T_SINK_TX 16 /* 16 - 20 ms */ #define PD_T_CHUNK_NOT_SUPP 42 /* 40 - 50 ms */ +#define PD_T_VCONN_STABLE 50 #define PD_T_DRP_TRY 100 /* 75 - 150 ms */ #define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */