From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0FE3C43381 for ; Fri, 5 Mar 2021 17:22:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF3406509F for ; Fri, 5 Mar 2021 17:22:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229512AbhCERVu (ORCPT ); Fri, 5 Mar 2021 12:21:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229465AbhCERVc (ORCPT ); Fri, 5 Mar 2021 12:21:32 -0500 Received: from mail-wr1-x42c.google.com (mail-wr1-x42c.google.com [IPv6:2a00:1450:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92C76C061574 for ; Fri, 5 Mar 2021 09:21:31 -0800 (PST) Received: by mail-wr1-x42c.google.com with SMTP id d11so2911790wrj.7 for ; Fri, 05 Mar 2021 09:21:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=maxiluxsystems-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=xpnDtJcA9bj8waI+3svnc91FUe91K2daFVSXTcPdcz8=; b=iSdF/02CEyw+Xl0GatGsrHBecJJMeCAF9bkGP6UWVejUL1WUK4B0Y6YF0Ae5WdCIkX 70P8fWy8Y5KI+0n6Hv430Y7B3xPe3GvNvXiTGs9xs3g7JYMui2LoSCpxh84LLn0j7ED8 ENf0eu84AG+CYQG/RENO+D9+uIGcqQDiLvXGmbaTCMgNUC+zOcK5zlt2+X37aZrj+5zH +p7jvmw1vIRDavbDHZRg9c5jywVzlHk/Yc8zB1dM5w6kdfO7CaEntwBIEB8pFFZHSulI 3POnm4JpuBu7/lQtBppZ+Kxl+b9N38I5KeCcN16PkFZ68Yq4MMaJFB0v0HYfWJHhIykJ QwoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=xpnDtJcA9bj8waI+3svnc91FUe91K2daFVSXTcPdcz8=; b=c8O96YHeF+yRt5fmJ29GCsqsvZtVDGtCTn+YjZSwbQ8YIrp/lmCJ5MrPK2Z0HOKQ+K Gg6/lItzqJkuOf6Bs7iaREweKi0d5g465Mt7N17JxLf83+kMjMa2WNnQ19sKrsDHEgDk Y/uA7lX+qAgs9YIaDV/Wri0YqWXgMGAjwGUtie7lu2HIIb8YqbFTHCSoyEDD2wFtLG+a KBiT2tY5APnEhunoMkKp3csxxH+ISS8iK1yjWl1XUi3jsEd02HzOhYuUagKo7Ux6pTRG rxj53jBUzwchTCBZJuOLNiw2RxDCtlSY/aXvuj743XHlIbihl+0XwhoRpa7WUOeih3Tm qh6Q== X-Gm-Message-State: AOAM530Ty+PeV9ZqdVS7xwTjLiI/krsaQVPP+XbqD+oaAR7nG1rQP72Y WcYU5QAtuCR55vvDBgaXmp1/MkoJiQgQrg== X-Google-Smtp-Source: ABdhPJx3DlhiQ18ZoeYroAvLNbretXczqll5CdqrlRxX2fSpG948aOZ6hKDTV578DwMrvaI/18nxRg== X-Received: by 2002:adf:a4d1:: with SMTP id h17mr10451184wrb.57.1614964890200; Fri, 05 Mar 2021 09:21:30 -0800 (PST) Received: from localhost.localdomain ([185.69.145.254]) by smtp.gmail.com with ESMTPSA id c9sm5174926wmb.33.2021.03.05.09.21.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Mar 2021 09:21:29 -0800 (PST) From: Torin Cooper-Bennun To: linux-can@vger.kernel.org Cc: Marc Kleine-Budde , Pankaj Sharma , Torin Cooper-Bennun Subject: [PATCH 1/3] can: m_can: add infrastructure for internal timestamps Date: Fri, 5 Mar 2021 17:20:13 +0000 Message-Id: <20210305172015.1506525-2-torin@maxiluxsystems.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210305172015.1506525-1-torin@maxiluxsystems.com> References: <20210305172015.1506525-1-torin@maxiluxsystems.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Add infrastucture to allow internal timestamps from the M_CAN to be configured and retrieved. Signed-off-by: Torin Cooper-Bennun --- drivers/net/can/m_can/m_can.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 0c8d36bc668c..ea79cf0640a8 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -148,6 +148,19 @@ enum m_can_reg { #define NBTP_NTSEG2_SHIFT 0 #define NBTP_NTSEG2_MASK (0x7f << NBTP_NTSEG2_SHIFT) +/* Timestamp Counter Configuration Register (TSCC) */ +#define TSCC_TCP_SHIFT 16 +#define TSCC_TCP_MASK (0xf << TSCC_TCP_SHIFT) +#define TSCC_TSS_SHIFT 0 +#define TSCC_TSS_MASK (0x3 << TSCC_TSS_SHIFT) +#define TSCC_TSS_DISABLE (0x0 << TSCC_TSS_SHIFT) +#define TSCC_TSS_INTERNAL (0x1 << TSCC_TSS_SHIFT) +#define TSCC_TSS_EXTERNAL (0x2 << TSCC_TSS_SHIFT) + +/* Timestamp Counter Value Register (TSCV) */ +#define TSCV_TSC_SHIFT 0 +#define TSCV_TSC_MASK (0xffff << TSCV_TSC_SHIFT) + /* Error Counter Register(ECR) */ #define ECR_RP BIT(15) #define ECR_REC_SHIFT 8 @@ -302,6 +315,8 @@ enum m_can_reg { #define RX_BUF_ANMF BIT(31) #define RX_BUF_FDF BIT(21) #define RX_BUF_BRS BIT(20) +#define RX_BUF_RXTS_SHIFT 0 +#define RX_BUF_RXTS_MASK (0xffff << RX_BUF_RXTS_SHIFT) /* Tx Buffer Element */ /* T0 */ @@ -319,6 +334,8 @@ enum m_can_reg { /* E1 */ #define TX_EVENT_MM_SHIFT TX_BUF_MM_SHIFT #define TX_EVENT_MM_MASK (0xff << TX_EVENT_MM_SHIFT) +#define TX_EVENT_TXTS_SHIFT 0 +#define TX_EVENT_TXTS_MASK (0xffff << TX_EVENT_TXTS_SHIFT) static inline u32 m_can_read(struct m_can_classdev *cdev, enum m_can_reg reg) { @@ -413,6 +430,20 @@ static inline void m_can_disable_all_interrupts(struct m_can_classdev *cdev) m_can_write(cdev, M_CAN_ILE, 0x0); } +/* Retrieve internal timestamp counter from TSCV.TSC, and shift it to 32-bit + * width. + */ +static u32 m_can_get_timestamp(struct m_can_classdev *cdev) +{ + u32 tscv; + u32 tsc; + + tscv = m_can_read(cdev, M_CAN_TSCV); + tsc = (tscv & TSCV_TSC_MASK) >> TSCV_TSC_SHIFT; + + return (tsc << 16); +} + static void m_can_clean(struct net_device *net) { struct m_can_classdev *cdev = netdev_priv(net); -- 2.30.1