Commit 2dcb8e87 authored by Martin Jerabek's avatar Martin Jerabek Committed by Marc Kleine-Budde
Browse files

can: ctucanfd: add support for CTU CAN FD open-source IP core - bus independent part. 

This driver adds support for the CTU CAN FD open-source IP core.
More documentation and core sources at project page
(https://gitlab.fel.cvut.cz/canbus/ctucanfd_ip_core).
The core integration to Xilinx Zynq system as platform driver
is available (https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top).
Implementation on Intel FPGA based PCI Express board is available
from project (https://gitlab.fel.cvut.cz/canbus/pcie-ctucanfd).

More about CAN bus related projects used and developed at CTU FEE at
https://canbus.pages.fel.cvut.cz/ .

Link: https://lore.kernel.org/all/1906e4941560ae2ce4b8d181131fd4963aa31611.1647904780.git.pisa@cmp.felk.cvut.cz


Signed-off-by: default avatarMartin Jerabek <martin.jerabek01@gmail.com>
Signed-off-by: default avatarOndrej Ille <ondrej.ille@gmail.com>
Signed-off-by: default avatarPavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 1da9d6e3

drivers/net/can/Kconfig

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@@ -170,6 +170,7 @@ config PCH_CAN 


source "drivers/net/can/c_can/Kconfig"

source "drivers/net/can/cc770/Kconfig"

source "drivers/net/can/ctucanfd/Kconfig"

source "drivers/net/can/ifi_canfd/Kconfig"

source "drivers/net/can/m_can/Kconfig"

source "drivers/net/can/mscan/Kconfig"

drivers/net/can/Makefile

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@@ -16,6 +16,7 @@ obj-y += softing/ 
obj-$(CONFIG_CAN_AT91)		+= at91_can.o

obj-$(CONFIG_CAN_CC770)		+= cc770/

obj-$(CONFIG_CAN_C_CAN)		+= c_can/

obj-$(CONFIG_CAN_CTUCANFD)	+= ctucanfd/

obj-$(CONFIG_CAN_FLEXCAN)	+= flexcan/

obj-$(CONFIG_CAN_GRCAN)		+= grcan.o

obj-$(CONFIG_CAN_IFI_CANFD)	+= ifi_canfd/

drivers/net/can/ctucanfd/Kconfig

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config CAN_CTUCANFD

	tristate "CTU CAN-FD IP core"

	help

	  This driver adds support for the CTU CAN FD open-source IP core.

	  More documentation and core sources at project page

	  (https://gitlab.fel.cvut.cz/canbus/ctucanfd_ip_core).

	  The core integration to Xilinx Zynq system as platform driver

	  is available (https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top).

	  Implementation on Intel FPGA-based PCI Express board is available

	  from project (https://gitlab.fel.cvut.cz/canbus/pcie-ctucanfd) and

	  on Intel SoC from project (https://gitlab.fel.cvut.cz/canbus/intel-soc-ctucanfd).

	  Guidepost CTU FEE CAN bus projects page https://canbus.pages.fel.cvut.cz/ .

drivers/net/can/ctucanfd/Makefile

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# SPDX-License-Identifier: GPL-2.0-or-later

#

# Makefile for the CTU CAN-FD IP module drivers

#



obj-$(CONFIG_CAN_CTUCANFD) := ctucanfd.o

ctucanfd-y := ctucanfd_base.o

drivers/net/can/ctucanfd/ctucanfd.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */

/*******************************************************************************

 *

 * CTU CAN FD IP Core

 *

 * Copyright (C) 2015-2018 Ondrej Ille <ondrej.ille@gmail.com> FEE CTU

 * Copyright (C) 2018-2021 Ondrej Ille <ondrej.ille@gmail.com> self-funded

 * Copyright (C) 2018-2019 Martin Jerabek <martin.jerabek01@gmail.com> FEE CTU

 * Copyright (C) 2018-2021 Pavel Pisa <pisa@cmp.felk.cvut.cz> FEE CTU/self-funded

 *

 * Project advisors:

 *     Jiri Novak <jnovak@fel.cvut.cz>

 *     Pavel Pisa <pisa@cmp.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/)

 ******************************************************************************/



#ifndef __CTUCANFD__

#define __CTUCANFD__



#include <linux/netdevice.h>

#include <linux/can/dev.h>

#include <linux/list.h>



enum ctu_can_fd_can_registers;



struct ctucan_priv {

	struct can_priv can; /* must be first member! */



	void __iomem *mem_base;

	u32 (*read_reg)(struct ctucan_priv *priv,

			enum ctu_can_fd_can_registers reg);

	void (*write_reg)(struct ctucan_priv *priv,

			  enum ctu_can_fd_can_registers reg, u32 val);



	unsigned int txb_head;

	unsigned int txb_tail;

	u32 txb_prio;

	unsigned int ntxbufs;

	spinlock_t tx_lock; /* spinlock to serialize allocation and processing of TX buffers */



	struct napi_struct napi;

	struct device *dev;

	struct clk *can_clk;



	int irq_flags;

	unsigned long drv_flags;



	u32 rxfrm_first_word;



	struct list_head peers_on_pdev;

};



/**

 * ctucan_probe_common - Device type independent registration call

 *

 * This function does all the memory allocation and registration for the CAN

 * device.

 *

 * @dev:	Handle to the generic device structure

 * @addr:	Base address of CTU CAN FD core address

 * @irq:	Interrupt number

 * @ntxbufs:	Number of implemented Tx buffers

 * @can_clk_rate: Clock rate, if 0 then clock are taken from device node

 * @pm_enable_call: Whether pm_runtime_enable should be called

 * @set_drvdata_fnc: Function to set network driver data for physical device

 *

 * Return: 0 on success and failure value on error

 */

int ctucan_probe_common(struct device *dev, void __iomem *addr,

			int irq, unsigned int ntxbufs,

			unsigned long can_clk_rate,

			int pm_enable_call,

			void (*set_drvdata_fnc)(struct device *dev,

						struct net_device *ndev));



int ctucan_suspend(struct device *dev) __maybe_unused;

int ctucan_resume(struct device *dev) __maybe_unused;



#endif /*__CTUCANFD__*/