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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 01526C2D0D3 for ; Sat, 21 Dec 2019 14:15:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA34421927 for ; Sat, 21 Dec 2019 14:15:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727274AbfLUOPC (ORCPT ); Sat, 21 Dec 2019 09:15:02 -0500 Received: from smtp7.web4u.cz ([81.91.87.87]:51180 "EHLO mx-8.mail.web4u.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727109AbfLUOPB (ORCPT ); Sat, 21 Dec 2019 09:15:01 -0500 Received: from mx-8.mail.web4u.cz (localhost [127.0.0.1]) by mx-8.mail.web4u.cz (Postfix) with ESMTP id 1B327203722; Sat, 21 Dec 2019 15:08:33 +0100 (CET) Received: from thor.pikron.com (unknown [89.102.8.6]) (Authenticated sender: ppisa@pikron.com) by mx-8.mail.web4u.cz (Postfix) with ESMTPA id B547D2036EA; Sat, 21 Dec 2019 15:08:32 +0100 (CET) From: pisa@cmp.felk.cvut.cz To: devicetree@vger.kernel.org, mkl@pengutronix.de, linux-can@vger.kernel.org, socketcan@hartkopp.net Cc: wg@grandegger.com, davem@davemloft.net, robh+dt@kernel.org, mark.rutland@arm.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, martin.jerabek01@gmail.com, ondrej.ille@gmail.com, jnovak@fel.cvut.cz, jara.beran@gmail.com, porazil@pikron.com, Pavel Pisa Subject: [PATCH v3 5/6] can: ctucanfd: CTU CAN FD open-source IP core - platform/SoC support. Date: Sat, 21 Dec 2019 15:07:34 +0100 Message-Id: <35776e315ff29fba5416b17f83168f2f32da5b99.1576922226.git.pisa@cmp.felk.cvut.cz> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-W4U-Auth: f74faddb69f87e885e46213eceaf79559e6df833 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Pavel Pisa 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/b182/courses/b35apo/documentation/mz_apo/start . 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 + drivers/net/can/ctucanfd/ctu_can_fd_platform.c | 145 +++++++++++++++++++++++++ 3 files changed, 159 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 798040e9bcef..c5b7c000fbb3 100644 --- a/drivers/net/can/ctucanfd/Kconfig +++ b/drivers/net/can/ctucanfd/Kconfig @@ -24,4 +24,15 @@ 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..53ec3c9f8ec2 --- /dev/null +++ b/drivers/net/can/ctucanfd/ctu_can_fd_platform.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0+ +/******************************************************************************* + * + * CTU CAN FD IP Core + * Copyright (C) 2015-2018 + * + * Authors: + * Ondrej Ille + * Martin Jerabek + * Jaroslav Beran + * + * 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" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Martin Jerabek"); +MODULE_DESCRIPTION("CTU CAN FD for platform"); + +#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 const struct dev_pm_ops ctucan_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ctucan_suspend, ctucan_resume) +}; + +/* Match table for OF platform binding */ +static const struct of_device_id ctucan_of_match[] = { + { .compatible = "ctu,canfd-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_dev_pm_ops, + .of_match_table = ctucan_of_match, + }, +}; + +module_platform_driver(ctucanfd_driver); -- 2.11.0