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Message-Id: <7f58b96630de26275fcaed73fdb8fb8f4ac94f36.1604095004.git.pisa@cmp.felk.cvut.cz>
Date: Fri, 30 Oct 2020 23:19:27 +0100
From: Pavel Pisa <pisa@....felk.cvut.cz>
To: linux-can@...r.kernel.org, devicetree@...r.kernel.org,
"Marc Kleine-Budde" <mkl@...gutronix.de>,
Oliver Hartkopp <socketcan@...tkopp.net>
Cc: Wolfgang Grandegger <wg@...ndegger.com>,
David Miller <davem@...emloft.net>,
Rob Herring <robh+dt@...nel.org>, mark.rutland@....com,
Carsten Emde <c.emde@...dl.org>, armbru@...hat.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Marin Jerabek <martin.jerabek01@...il.com>,
Ondrej Ille <ondrej.ille@...il.com>,
Jiri Novak <jnovak@....cvut.cz>,
Jaroslav Beran <jara.beran@...il.com>,
Petr Porazil <porazil@...ron.com>, Pavel Machek <pavel@....cz>,
Drew Fustini <pdp7pdp7@...il.com>,
Pavel Pisa <pisa@....felk.cvut.cz>
Subject: [PATCH v7 5/6] can: ctucanfd: CTU CAN FD open-source IP core - platform/SoC support.
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 <pisa@....felk.cvut.cz>
Signed-off-by: Martin Jerabek <martin.jerabek01@...il.com>
Signed-off-by: Ondrej Ille <ondrej.ille@...il.com>
---
drivers/net/can/ctucanfd/Kconfig | 12 ++
drivers/net/can/ctucanfd/Makefile | 1 +
drivers/net/can/ctucanfd/ctucanfd_platform.c | 142 +++++++++++++++++++
3 files changed, 155 insertions(+)
create mode 100644 drivers/net/can/ctucanfd/ctucanfd_platform.c
diff --git a/drivers/net/can/ctucanfd/Kconfig b/drivers/net/can/ctucanfd/Kconfig
index 039df460cf0c..20a9a1b5ae8d 100644
--- a/drivers/net/can/ctucanfd/Kconfig
+++ b/drivers/net/can/ctucanfd/Kconfig
@@ -20,3 +20,15 @@ config CAN_CTUCANFD_PCI
The project providing FPGA design for Intel EP4CGX15 based DB4CGX15
PCIe board with PiKRON.com designed transceiver riser shield is available
at https://gitlab.fel.cvut.cz/canbus/pcie-ctucanfd .
+
+config CAN_CTUCANFD_PLATFORM
+ tristate "CTU CAN-FD IP core platform (FPGA, SoC) driver"
+ depends on CAN_CTUCANFD
+ depends on OF || COMPILE_TEST
+ 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 .
diff --git a/drivers/net/can/ctucanfd/Makefile b/drivers/net/can/ctucanfd/Makefile
index b679859c7c9b..d4223812391d 100644
--- a/drivers/net/can/ctucanfd/Makefile
+++ b/drivers/net/can/ctucanfd/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_CAN_CTUCANFD) := ctucanfd.o
ctucanfd-y := ctucanfd_base.o ctucanfd_hw.o
obj-$(CONFIG_CAN_CTUCANFD_PCI) += ctucanfd_pci.o
+obj-$(CONFIG_CAN_CTUCANFD_PLATFORM) += ctucanfd_platform.o
diff --git a/drivers/net/can/ctucanfd/ctucanfd_platform.c b/drivers/net/can/ctucanfd/ctucanfd_platform.c
new file mode 100644
index 000000000000..d8146cfb2f39
--- /dev/null
+++ b/drivers/net/can/ctucanfd/ctucanfd_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 <ondrej.ille@...il.com> FEE CTU
+ * Copyright (C) 2018-2020 Ondrej Ille <ondrej.ille@...il.com> self-funded
+ * Copyright (C) 2018-2019 Martin Jerabek <martin.jerabek01@...il.com> FEE CTU
+ * Copyright (C) 2018-2020 Pavel Pisa <pisa@....felk.cvut.cz> FEE CTU/self-funded
+ *
+ * Project advisors:
+ * Jiri Novak <jnovak@....cvut.cz>
+ * Pavel Pisa <pisa@....felk.cvut.cz>
+ *
+ * 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 <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "ctucanfd.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");
--
2.20.1
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