From patchwork Sat Aug 15 19:43:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pavel Pisa X-Patchwork-Id: 1345401 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=cmp.felk.cvut.cz Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BTZlQ3Y1kz9sTR for ; Sun, 16 Aug 2020 08:30:58 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729392AbgHOWau (ORCPT ); Sat, 15 Aug 2020 18:30:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729297AbgHOWan (ORCPT ); Sat, 15 Aug 2020 18:30:43 -0400 Received: from relay.felk.cvut.cz (relay.felk.cvut.cz [IPv6:2001:718:2:1611:0:1:0:70]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 11A38C0045B3 for ; Sat, 15 Aug 2020 12:59:26 -0700 (PDT) Received: from cmp.felk.cvut.cz (haar.felk.cvut.cz [147.32.84.19]) by relay.felk.cvut.cz (8.15.2/8.15.2) with ESMTP id 07FJwa7T068168; Sat, 15 Aug 2020 21:58:36 +0200 (CEST) (envelope-from pisa@cmp.felk.cvut.cz) Received: from haar.felk.cvut.cz (localhost [127.0.0.1]) by cmp.felk.cvut.cz (8.14.0/8.12.3/SuSE Linux 0.6) with ESMTP id 07FJwaPg001035; Sat, 15 Aug 2020 21:58:36 +0200 Received: (from pisa@localhost) by haar.felk.cvut.cz (8.14.0/8.13.7/Submit) id 07FJwad3001034; Sat, 15 Aug 2020 21:58:36 +0200 From: Pavel Pisa To: linux-can@vger.kernel.org, devicetree@vger.kernel.org, "Marc Kleine-Budde" , Oliver Hartkopp Cc: Wolfgang Grandegger , David Miller , Rob Herring , mark.rutland@arm.com, Carsten Emde , armbru@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Marin Jerabek , Ondrej Ille , Jiri Novak , Jaroslav Beran , Petr Porazil , Pavel Pisa Subject: [PATCH v5 5/6] can: ctucanfd: CTU CAN FD open-source IP core - platform/SoC support. Date: Sat, 15 Aug 2020 21:43:07 +0200 Message-Id: <4ceda3a9d68263b4e0dfe66521a46f40b2e502f7.1597518433.git.ppisa@pikron.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-FELK-MailScanner-Information: X-MailScanner-ID: 07FJwa7T068168 X-FELK-MailScanner: Found to be clean X-FELK-MailScanner-SpamCheck: not spam, SpamAssassin (not cached, score=-0.497, required 6, autolearn=not spam, BAYES_00 -0.50, KHOP_HELO_FCRDNS 0.00, SPF_HELO_NONE 0.00, SPF_NONE 0.00) X-FELK-MailScanner-From: pisa@cmp.felk.cvut.cz X-FELK-MailScanner-Watermark: 1598126318.06685@XFUL32+Siwz7C+JDZTg5TA X-Spam-Status: No Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Platform bus adaptation for CTU CAN FD open-source IP core. The core has been tested together with OpenCores SJA1000 modified to be CAN FD frames tolerant on MicroZed Zynq based MZ_APO education kits designed by Petr Porazil from PiKRON.com company. FPGA design https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top. The kit description at the Computer Architectures course pages https://cw.fel.cvut.cz/wiki/courses/b35apo/documentation/mz_apo/start . Kit carrier board and mechanics design source files https://gitlab.com/pikron/projects/mz_apo/microzed_apo The work is documented in Martin Jeřábek's diploma theses Open-source and Open-hardware CAN FD Protocol Support https://dspace.cvut.cz/handle/10467/80366 . Signed-off-by: Pavel Pisa Signed-off-by: Martin Jerabek Signed-off-by: Ondrej Ille --- drivers/net/can/ctucanfd/Kconfig | 11 ++ drivers/net/can/ctucanfd/Makefile | 3 + .../net/can/ctucanfd/ctu_can_fd_platform.c | 142 ++++++++++++++++++ 3 files changed, 156 insertions(+) create mode 100644 drivers/net/can/ctucanfd/ctu_can_fd_platform.c diff --git a/drivers/net/can/ctucanfd/Kconfig b/drivers/net/can/ctucanfd/Kconfig index e1636373628a..a8c9cc38f216 100644 --- a/drivers/net/can/ctucanfd/Kconfig +++ b/drivers/net/can/ctucanfd/Kconfig @@ -21,4 +21,15 @@ config CAN_CTUCANFD_PCI PCIe board with PiKRON.com designed transceiver riser shield is available at https://gitlab.fel.cvut.cz/canbus/pcie-ctu_can_fd . +config CAN_CTUCANFD_PLATFORM + tristate "CTU CAN-FD IP core platform (FPGA, SoC) driver" + depends on OF + help + The core has been tested together with OpenCores SJA1000 + modified to be CAN FD frames tolerant on MicroZed Zynq based + MZ_APO education kits designed by Petr Porazil from PiKRON.com + company. FPGA design https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top. + The kit description at the Computer Architectures course pages + https://cw.fel.cvut.cz/b182/courses/b35apo/documentation/mz_apo/start . + endif diff --git a/drivers/net/can/ctucanfd/Makefile b/drivers/net/can/ctucanfd/Makefile index eb945260952d..a77ca72d534e 100644 --- a/drivers/net/can/ctucanfd/Makefile +++ b/drivers/net/can/ctucanfd/Makefile @@ -8,3 +8,6 @@ ctucanfd-y := ctu_can_fd.o ctu_can_fd_hw.o obj-$(CONFIG_CAN_CTUCANFD_PCI) += ctucanfd_pci.o ctucanfd_pci-y := ctu_can_fd_pci.o + +obj-$(CONFIG_CAN_CTUCANFD_PLATFORM) += ctucanfd_platform.o +ctucanfd_platform-y += ctu_can_fd_platform.o diff --git a/drivers/net/can/ctucanfd/ctu_can_fd_platform.c b/drivers/net/can/ctucanfd/ctu_can_fd_platform.c new file mode 100644 index 000000000000..c35b16b8566b --- /dev/null +++ b/drivers/net/can/ctucanfd/ctu_can_fd_platform.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/******************************************************************************* + * + * CTU CAN FD IP Core + * + * Copyright (C) 2015-2018 Ondrej Ille FEE CTU + * Copyright (C) 2018-2020 Ondrej Ille self-funded + * Copyright (C) 2018-2019 Martin Jerabek FEE CTU + * Copyright (C) 2018-2020 Pavel Pisa FEE CTU/self-funded + * + * Project advisors: + * Jiri Novak + * Pavel Pisa + * + * Department of Measurement (http://meas.fel.cvut.cz/) + * Faculty of Electrical Engineering (http://www.fel.cvut.cz) + * Czech Technical University (http://www.cvut.cz/) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + ******************************************************************************/ + +#include +#include +#include +#include +#include + +#include "ctu_can_fd.h" + +#define DRV_NAME "ctucanfd" + +static void ctucan_platform_set_drvdata(struct device *dev, + struct net_device *ndev) +{ + struct platform_device *pdev = container_of(dev, struct platform_device, + dev); + + platform_set_drvdata(pdev, ndev); +} + +/** + * ctucan_platform_probe - Platform registration call + * @pdev: Handle to the platform device structure + * + * This function does all the memory allocation and registration for the CAN + * device. + * + * Return: 0 on success and failure value on error + */ +static int ctucan_platform_probe(struct platform_device *pdev) +{ + struct resource *res; /* IO mem resources */ + struct device *dev = &pdev->dev; + void __iomem *addr; + int ret; + unsigned int ntxbufs; + int irq; + + /* Get the virtual base address for the device */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + addr = devm_ioremap_resource(dev, res); + if (IS_ERR(addr)) { + dev_err(dev, "Cannot remap address.\n"); + ret = PTR_ERR(addr); + goto err; + } + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "Cannot find interrupt.\n"); + ret = irq; + goto err; + } + + /* Number of tx bufs might be change in HW for future. If so, + * it will be passed as property via device tree + */ + ntxbufs = 4; + ret = ctucan_probe_common(dev, addr, irq, ntxbufs, 0, + 1, ctucan_platform_set_drvdata); + + if (ret < 0) + platform_set_drvdata(pdev, NULL); + +err: + return ret; +} + +/** + * ctucan_platform_remove - Unregister the device after releasing the resources + * @pdev: Handle to the platform device structure + * + * This function frees all the resources allocated to the device. + * Return: 0 always + */ +static int ctucan_platform_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ctucan_priv *priv = netdev_priv(ndev); + + netdev_dbg(ndev, "ctucan_remove"); + + unregister_candev(ndev); + pm_runtime_disable(&pdev->dev); + netif_napi_del(&priv->napi); + free_candev(ndev); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(ctucan_platform_pm_ops, ctucan_suspend, ctucan_resume); + +/* Match table for OF platform binding */ +static const struct of_device_id ctucan_of_match[] = { + { .compatible = "ctu,ctucanfd-2", }, + { .compatible = "ctu,ctucanfd", }, + { /* end of list */ }, +}; +MODULE_DEVICE_TABLE(of, ctucan_of_match); + +static struct platform_driver ctucanfd_driver = { + .probe = ctucan_platform_probe, + .remove = ctucan_platform_remove, + .driver = { + .name = DRV_NAME, + .pm = &ctucan_platform_pm_ops, + .of_match_table = ctucan_of_match, + }, +}; + +module_platform_driver(ctucanfd_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Martin Jerabek"); +MODULE_DESCRIPTION("CTU CAN FD for platform");