From patchwork Wed Dec 11 03:07:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Sunil Dhamne via B4 Relay X-Patchwork-Id: 13902784 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA3312451C5; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733886446; cv=none; b=ZYrG+4cc2cUNhZwRtbOdPO8O2MLC4Lq+fOOhPPOBpyqggGWlhhvrgCmmYtQJBIxRQgKg6ctBLei9vMvYNIGYVUDXHlM6Pvy2CtYjbpHC8hMV2QW8Fbfg/9w5Oto5QzqjUEYjilNAybKF1tEUF7pZx4ow6KZnEPs4HOjKOZk75gk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733886446; c=relaxed/simple; bh=Z6X7dtscopNLoz8nldaGstB4IaOylCRwJyOS1rJBRL8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VNLQgSanAJ/dSJUTuAH4HzSMLQybdMxgrzDj8sZw5uc8bA/946Oy7BVVUGCQSp8SQLohFaA/YipQ3LtCym100MtSIJk5cFpBqEfe9L8BrP4DsLW4ZpgMaNSjZaeaRwxgRypsGdEXMpD1dvfccifoiTT6ufFS8B6zr1YIJMzViik= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OEQZvE8B; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OEQZvE8B" Received: by smtp.kernel.org (Postfix) with ESMTPS id A63C4C4CEE8; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733886445; bh=Z6X7dtscopNLoz8nldaGstB4IaOylCRwJyOS1rJBRL8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=OEQZvE8BBM6PtI7CrFIFlGfd/cAROEDjV1Ez7QpvyteHQHLf9CFKaPNzP70SnLcKI KYUIaWEOLUDV/GmjSkXTrLyNHKOtH4XpfSPTW+rTs0wQH06DU3wHmvudISnHK1urU7 dSgJkA2bgR5gRjynQnFcgpQ6zD62U06bLiaAYa0eYhkdRgkcQp6JoZDEvjdE70POxt AN8W4aVVLlqiWVqZ3jsdywL3bgfkldOEFoFKxDm4UHYtw04RoWSEWqCGgsW6pBc3Do oMr7I2180W95Pvf3+VlsE+0I6d2jc4/lY3P8oy1CrtfFxIhamqfwlUxmnAn5ngwPBb zOnfK52KkEWAQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97684E77180; Wed, 11 Dec 2024 03:07:25 +0000 (UTC) From: Amit Sunil Dhamne via B4 Relay Date: Tue, 10 Dec 2024 19:07:09 -0800 Subject: [PATCH v2 3/3] usb: typec: tcpm: Add new AMS for Get_Revision response Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241210-get_rev_upstream-v2-3-d0094e52d48f@google.com> References: <20241210-get_rev_upstream-v2-0-d0094e52d48f@google.com> In-Reply-To: <20241210-get_rev_upstream-v2-0-d0094e52d48f@google.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Badhri Jagan Sridharan , Heikki Krogerus Cc: Kyle Tso , RD Babiera , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Amit Sunil Dhamne X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733886444; l=4930; i=amitsd@google.com; s=20241031; h=from:subject:message-id; bh=YvUI3CfbZ7WfPHWV3UO69yuWSZoIOQnnvLn9UUmlros=; b=twZ9Jg43zeC+dNyfJ/GALSE7oL41cdMQiWpprn4cLvNLH3jh8ty5Ew4EenHBCJ7nptF9YdgGp JsaKD+KOGDTDI5AXMGEPXBWth+BM86m0mMv2gKPlMRbhzwmGF0K+uGt X-Developer-Key: i=amitsd@google.com; a=ed25519; pk=wD+XZSST4dmnNZf62/lqJpLm7fiyT8iv462zmQ3H6bI= X-Endpoint-Received: by B4 Relay for amitsd@google.com/20241031 with auth_id=262 X-Original-From: Amit Sunil Dhamne Reply-To: amitsd@google.com From: Amit Sunil Dhamne This commit adds a new AMS for responding to a "Get_Revision" request. Revision message consists of the following fields: +----------------------------------------------------+ | Header | RMDO | | No. of data objects = 1 | | +----------------------------------------------------+ While RMDO consists of: * B31..28 Revision Major * B27..24 Revision Minor * B23..20 Version Major * B19..16 Version Minor * B15..0 Reserved, shall be set to zero. As per the PD spec ("8.3.3.16.2.1 PR_Give_Revision State"), a request is only expected when an explicit contract is established and the port is in ready state. This AMS is only supported for PD >= 3.0. Signed-off-by: Amit Sunil Dhamne Reviewed-by: Badhri Jagan Sridharan --- drivers/usb/typec/tcpm/tcpm.c | 41 ++++++++++++++++++++++++++++++++++++++++- include/linux/usb/pd.h | 22 ++++++++++++++++++++-- 2 files changed, 60 insertions(+), 3 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 59621cfaee3d67a36f3ad6870bd1aa92d382f33a..460dbde9fe2239b10c43cfb12dce92c736b1cea9 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -185,7 +185,8 @@ S(UNSTRUCTURED_VDMS), \ S(STRUCTURED_VDMS), \ S(COUNTRY_INFO), \ - S(COUNTRY_CODES) + S(COUNTRY_CODES), \ + S(REVISION_INFORMATION) #define GENERATE_ENUM(e) e #define GENERATE_STRING(s) #s @@ -225,6 +226,7 @@ enum pd_msg_request { PD_MSG_CTRL_NOT_SUPP, PD_MSG_DATA_SINK_CAP, PD_MSG_DATA_SOURCE_CAP, + PD_MSG_DATA_REV, }; enum adev_actions { @@ -1244,6 +1246,24 @@ static u32 tcpm_forge_legacy_pdo(struct tcpm_port *port, u32 pdo, enum typec_rol } } +static int tcpm_pd_send_revision(struct tcpm_port *port) +{ + struct pd_message msg; + u32 rmdo; + + memset(&msg, 0, sizeof(msg)); + rmdo = RMDO(port->pd_rev.rev_major, port->pd_rev.rev_minor, + port->pd_rev.ver_major, port->pd_rev.ver_minor); + msg.payload[0] = cpu_to_le32(rmdo); + msg.header = PD_HEADER_LE(PD_DATA_REVISION, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + 1); + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + static int tcpm_pd_send_source_caps(struct tcpm_port *port) { struct pd_message msg; @@ -3547,6 +3567,17 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); break; + case PD_CTRL_GET_REVISION: + if (port->negotiated_rev >= PD_REV30 && port->pd_rev.rev_major) + tcpm_pd_handle_msg(port, PD_MSG_DATA_REV, + REVISION_INFORMATION); + else + tcpm_pd_handle_msg(port, + port->negotiated_rev < PD_REV30 ? + PD_MSG_CTRL_REJECT : + PD_MSG_CTRL_NOT_SUPP, + NONE_AMS); + break; default: tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ? @@ -3791,6 +3822,14 @@ static bool tcpm_send_queued_message(struct tcpm_port *port) tcpm_ams_finish(port); } break; + case PD_MSG_DATA_REV: + ret = tcpm_pd_send_revision(port); + if (ret) + tcpm_log(port, + "Unable to send revision msg, ret=%d", + ret); + tcpm_ams_finish(port); + break; default: break; } diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h index d50098fb16b5d2e2d9e39c55db4329224115e8b1..3068c3084eb6176d7d9184c3959a4110282a9fa0 100644 --- a/include/linux/usb/pd.h +++ b/include/linux/usb/pd.h @@ -33,7 +33,9 @@ enum pd_ctrl_msg_type { PD_CTRL_FR_SWAP = 19, PD_CTRL_GET_PPS_STATUS = 20, PD_CTRL_GET_COUNTRY_CODES = 21, - /* 22-31 Reserved */ + /* 22-23 Reserved */ + PD_CTRL_GET_REVISION = 24, + /* 25-31 Reserved */ }; enum pd_data_msg_type { @@ -46,7 +48,9 @@ enum pd_data_msg_type { PD_DATA_ALERT = 6, PD_DATA_GET_COUNTRY_INFO = 7, PD_DATA_ENTER_USB = 8, - /* 9-14 Reserved */ + /* 9-11 Reserved */ + PD_DATA_REVISION = 12, + /* 13-14 Reserved */ PD_DATA_VENDOR_DEF = 15, /* 16-31 Reserved */ }; @@ -453,6 +457,20 @@ static inline unsigned int rdo_max_power(u32 rdo) #define EUDO_TBT_SUPPORT BIT(14) #define EUDO_HOST_PRESENT BIT(13) +/* + * Request Message Data Object (PD Revision 3.1+ only) + * -------- + * <31:28> :: Revision Major + * <27:24> :: Revision Minor + * <23:20> :: Version Major + * <19:16> :: Version Minor + * <15:0> :: Reserved, Shall be set to zero + */ + +#define RMDO(rev_maj, rev_min, ver_maj, ver_min) \ + (((rev_maj) & 0xf) << 28 | ((rev_min) & 0xf) << 24 | \ + ((ver_maj) & 0xf) << 20 | ((ver_min) & 0xf) << 16) + /* USB PD timers and counters */ #define PD_T_NO_RESPONSE 5000 /* 4.5 - 5.5 seconds */ #define PD_T_DB_DETECT 10000 /* 10 - 15 seconds */