The patch adds support for the PCI cards: PCIcan and PCIcanx (1, 2 or 4... (3878fb6f) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/net/can/Kconfig

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Original line number	Diff line number	Diff line
		@@ -58,6 +58,13 @@ config CAN_EMS_PCI
		This driver is for the one or two channel CPC-PCI and CPC-PCIe
		cards from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de).

		config CAN_KVASER_PCI
		tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards"
		depends on PCI && CAN_SJA1000
		---help---
		This driver is for the the PCIcanx and PCIcan cards (1, 2 or
		4 channel) from Kvaser (http://www.kvaser.com).

		config CAN_DEBUG_DEVICES
		bool "CAN devices debugging messages"
		depends on CAN

drivers/net/can/sja1000/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -5,5 +5,6 @@
		obj-$(CONFIG_CAN_SJA1000) += sja1000.o
		obj-$(CONFIG_CAN_SJA1000_PLATFORM) += sja1000_platform.o
		obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
		obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o

		ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG

drivers/net/can/sja1000/kvaser_pci.c

0 → 100644

+411 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2008 Per Dalen <per.dalen@cnw.se>
		*
		* Parts of this software are based on (derived) the following:
		*
		* - Kvaser linux driver, version 4.72 BETA
		* Copyright (C) 2002-2007 KVASER AB
		*
		* - Lincan driver, version 0.3.3, OCERA project
		* Copyright (C) 2004 Pavel Pisa
		* Copyright (C) 2001 Arnaud Westenberg
		*
		* - Socketcan SJA1000 drivers
		* Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
		* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
		* Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
		* 38106 Braunschweig, GERMANY
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the version 2 of the GNU General Public License
		* as published by the Free Software Foundation
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software Foundation,
		* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/interrupt.h>
		#include <linux/netdevice.h>
		#include <linux/delay.h>
		#include <linux/pci.h>
		#include <linux/can.h>
		#include <linux/can/dev.h>
		#include <linux/io.h>

		#include "sja1000.h"

		#define DRV_NAME "kvaser_pci"

		MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
		MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
		MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
		MODULE_LICENSE("GPL v2");

		#define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */

		struct kvaser_pci {
		int channel;
		struct pci_dev *pci_dev;
		struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
		void __iomem *conf_addr;
		void __iomem *res_addr;
		int no_channels;
		u8 xilinx_ver;
		};

		#define KVASER_PCI_CAN_CLOCK (16000000 / 2)

		/*
		* The board configuration is probably following:
		* RX1 is connected to ground.
		* TX1 is not connected.
		* CLKO is not connected.
		* Setting the OCR register to 0xDA is a good idea.
		* This means normal output mode , push-pull and the correct polarity.
		*/
		#define KVASER_PCI_OCR (OCR_TX0_PUSHPULL \| OCR_TX1_PUSHPULL)

		/*
		* In the CDR register, you should set CBP to 1.
		* You will probably also want to set the clock divider value to 0
		* (meaning divide-by-2), the Pelican bit, and the clock-off bit
		* (you will have no need for CLKOUT anyway).
		*/
		#define KVASER_PCI_CDR (CDR_CBP \| CDR_CLKOUT_MASK)

		/*
		* These register values are valid for revision 14 of the Xilinx logic.
		*/
		#define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
		high nibble version number. */

		#define XILINX_PRESUMED_VERSION 14

		/*
		* Important S5920 registers
		*/
		#define S5920_INTCSR 0x38
		#define S5920_PTCR 0x60
		#define INTCSR_ADDON_INTENABLE_M 0x2000


		#define KVASER_PCI_PORT_BYTES 0x20

		#define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
		#define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
		#define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */

		#define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
		#define KVASER_PCI_DEVICE_ID1 0x8406

		#define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
		#define KVASER_PCI_DEVICE_ID2 0x0008

		static struct pci_device_id kvaser_pci_tbl[] = {
		{KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
		{KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
		{ 0,}
		};

		MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);

		static u8 kvaser_pci_read_reg(const struct net_device *dev, int port)
		{
		return ioread8((void __iomem *)(dev->base_addr + port));
		}

		static void kvaser_pci_write_reg(const struct net_device *dev, int port, u8 val)
		{
		iowrite8(val, (void __iomem *)(dev->base_addr + port));
		}

		static void kvaser_pci_disable_irq(struct net_device *dev)
		{
		struct sja1000_priv *priv = netdev_priv(dev);
		struct kvaser_pci *board = priv->priv;
		u32 intcsr;

		/* Disable interrupts from card */
		intcsr = ioread32(board->conf_addr + S5920_INTCSR);
		intcsr &= ~INTCSR_ADDON_INTENABLE_M;
		iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
		}

		static void kvaser_pci_enable_irq(struct net_device *dev)
		{
		struct sja1000_priv *priv = netdev_priv(dev);
		struct kvaser_pci *board = priv->priv;
		u32 tmp_en_io;

		/* Enable interrupts from card */
		tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
		tmp_en_io \|= INTCSR_ADDON_INTENABLE_M;
		iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
		}

		static int number_of_sja1000_chip(void __iomem *base_addr)
		{
		u8 status;
		int i;

		for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
		/* reset chip */
		iowrite8(MOD_RM, base_addr +
		(i * KVASER_PCI_PORT_BYTES) + REG_MOD);
		status = ioread8(base_addr +
		(i * KVASER_PCI_PORT_BYTES) + REG_MOD);
		/* check reset bit */
		if (!(status & MOD_RM))
		break;
		}

		return i;
		}

		static void kvaser_pci_del_chan(struct net_device *dev)
		{
		struct sja1000_priv *priv;
		struct kvaser_pci *board;
		int i;

		if (!dev)
		return;
		priv = netdev_priv(dev);
		board = priv->priv;
		if (!board)
		return;

		dev_info(&board->pci_dev->dev, "Removing device %s\n",
		dev->name);

		/* Disable PCI interrupts */
		kvaser_pci_disable_irq(dev);

		for (i = 0; i < board->no_channels - 1; i++) {
		if (board->slave_dev[i]) {
		dev_info(&board->pci_dev->dev, "Removing device %s\n",
		board->slave_dev[i]->name);
		unregister_sja1000dev(board->slave_dev[i]);
		free_sja1000dev(board->slave_dev[i]);
		}
		}
		unregister_sja1000dev(dev);

		pci_iounmap(board->pci_dev, (void __iomem *)dev->base_addr);
		pci_iounmap(board->pci_dev, board->conf_addr);
		pci_iounmap(board->pci_dev, board->res_addr);

		free_sja1000dev(dev);
		}

		static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
		struct net_device **master_dev,
		void __iomem *conf_addr,
		void __iomem *res_addr,
		unsigned long base_addr)
		{
		struct net_device *dev;
		struct sja1000_priv *priv;
		struct kvaser_pci *board;
		int err, init_step;

		dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
		if (dev == NULL)
		return -ENOMEM;

		priv = netdev_priv(dev);
		board = priv->priv;

		board->pci_dev = pdev;
		board->channel = channel;

		/* S5920 */
		board->conf_addr = conf_addr;

		/* XILINX board wide address */
		board->res_addr = res_addr;

		if (channel == 0) {
		board->xilinx_ver =
		ioread8(board->res_addr + XILINX_VERINT) >> 4;
		init_step = 2;

		/* Assert PTADR# - we're in passive mode so the other bits are
		not important */
		iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);

		/* Enable interrupts from card */
		kvaser_pci_enable_irq(dev);
		} else {
		struct sja1000_priv master_priv = netdev_priv(master_dev);
		struct kvaser_pci *master_board = master_priv->priv;
		master_board->slave_dev[channel - 1] = dev;
		master_board->no_channels = channel + 1;
		board->xilinx_ver = master_board->xilinx_ver;
		}

		dev->base_addr = base_addr + channel * KVASER_PCI_PORT_BYTES;

		priv->read_reg = kvaser_pci_read_reg;
		priv->write_reg = kvaser_pci_write_reg;

		priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;

		priv->ocr = KVASER_PCI_OCR;
		priv->cdr = KVASER_PCI_CDR;

		priv->irq_flags = IRQF_SHARED;
		dev->irq = pdev->irq;

		init_step = 4;

		dev_info(&pdev->dev, "base_addr=%#lx conf_addr=%p irq=%d\n",
		dev->base_addr, board->conf_addr, dev->irq);

		SET_NETDEV_DEV(dev, &pdev->dev);

		/* Register SJA1000 device */
		err = register_sja1000dev(dev);
		if (err) {
		dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
		err);
		goto failure;
		}

		if (channel == 0)
		*master_dev = dev;

		return 0;

		failure:
		kvaser_pci_del_chan(dev);
		return err;
		}

		static int __devinit kvaser_pci_init_one(struct pci_dev *pdev,
		const struct pci_device_id *ent)
		{
		int err;
		struct net_device *master_dev = NULL;
		struct sja1000_priv *priv;
		struct kvaser_pci *board;
		int no_channels;
		void __iomem *base_addr = NULL;
		void __iomem *conf_addr = NULL;
		void __iomem *res_addr = NULL;
		int i;

		dev_info(&pdev->dev, "initializing device %04x:%04x\n",
		pdev->vendor, pdev->device);

		err = pci_enable_device(pdev);
		if (err)
		goto failure;

		err = pci_request_regions(pdev, DRV_NAME);
		if (err)
		goto failure_release_pci;

		/* S5920 */
		conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
		if (conf_addr == NULL) {
		err = -ENODEV;
		goto failure_release_regions;
		}

		/* XILINX board wide address */
		res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
		if (res_addr == NULL) {
		err = -ENOMEM;
		goto failure_iounmap;
		}

		base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
		if (base_addr == NULL) {
		err = -ENOMEM;
		goto failure_iounmap;
		}

		no_channels = number_of_sja1000_chip(base_addr);
		if (no_channels == 0) {
		err = -ENOMEM;
		goto failure_iounmap;
		}

		for (i = 0; i < no_channels; i++) {
		err = kvaser_pci_add_chan(pdev, i, &master_dev,
		conf_addr, res_addr,
		(unsigned long)base_addr);
		if (err)
		goto failure_cleanup;
		}

		priv = netdev_priv(master_dev);
		board = priv->priv;

		dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
		board->xilinx_ver, board->no_channels);

		pci_set_drvdata(pdev, master_dev);
		return 0;

		failure_cleanup:
		kvaser_pci_del_chan(master_dev);

		failure_iounmap:
		if (conf_addr != NULL)
		pci_iounmap(pdev, conf_addr);
		if (res_addr != NULL)
		pci_iounmap(pdev, res_addr);
		if (base_addr != NULL)
		pci_iounmap(pdev, base_addr);

		failure_release_regions:
		pci_release_regions(pdev);

		failure_release_pci:
		pci_disable_device(pdev);

		failure:
		return err;

		}

		static void __devexit kvaser_pci_remove_one(struct pci_dev *pdev)
		{
		struct net_device *dev = pci_get_drvdata(pdev);

		kvaser_pci_del_chan(dev);

		pci_release_regions(pdev);
		pci_disable_device(pdev);
		pci_set_drvdata(pdev, NULL);
		}

		static struct pci_driver kvaser_pci_driver = {
		.name = DRV_NAME,
		.id_table = kvaser_pci_tbl,
		.probe = kvaser_pci_init_one,
		.remove = __devexit_p(kvaser_pci_remove_one),
		};

		static int __init kvaser_pci_init(void)
		{
		return pci_register_driver(&kvaser_pci_driver);
		}

		static void __exit kvaser_pci_exit(void)
		{
		pci_unregister_driver(&kvaser_pci_driver);
		}

		module_init(kvaser_pci_init);
		module_exit(kvaser_pci_exit);