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Date:	Mon, 1 Feb 2010 11:56:11 -0800
From:	"Ira W. Snyder" <iws@...o.caltech.edu>
To:	"Pavel B. Cheblakov" <P.B.Cheblakov@....nsk.su>
Cc:	netdev@...r.kernel.org, Socketcan-core@...ts.berlios.de
Subject: Re: [net-next-2.6 v2] can: add support for CAN interface cards
 based on the PLX90xx PCI bridge

On Tue, Feb 02, 2010 at 01:42:44AM +0600, Pavel B. Cheblakov wrote:
> From: Pavel Cheblakov <P.B.Cheblakov@....nsk.su>
> 
> This driver is for CAN interface cards based on the PLX90xx PCI bridge.
> Driver supports now:
>  - Adlink PCI-7841/cPCI-7841 card (http://www.adlinktech.com/)
>  - Adlink PCI-7841/cPCI-7841 SE card
>  - Marathon CAN-bus-PCI card (http://www.marathon.ru/)
>  - TEWS TECHNOLOGIES TPMC810 card (http://www.tews.com/)
> 
> Changes since v1:
>  - Added some defines for static inline int plx_pci_check_sja1000(...)
>  - static struct pci_device_id plx_pci_tbl[] replaced by
>    static DEFINE_PCI_DEVICE_TABLE(plx_pci_tbl)
>  - Typo fixed
> 

Hello,

Any ideas if this driver could support the Janz PCI CAN cards as well? I
don't have any documentation for the cards, and I'd love to get away
from their closed-source drivers.

Here is the lspci output of two of these cards, if it helps:

iws@...cwdc ~ $ lspci -v -s 01:
01:0d.0 CANBUS: PLX Technology, Inc. PCI9030 32-bit 33MHz PCI <-> IOBus Bridge
	Subsystem: Janz Computer AG Device 0101
	Flags: medium devsel, IRQ 153
	Memory at febff800 (32-bit, non-prefetchable) [size=128]
	I/O ports at e880 [size=128]
	Memory at febfb000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfa000 (32-bit, non-prefetchable) [size=4K]
	Memory at febf9000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>

01:0e.0 Bridge: PLX Technology, Inc. PCI <-> IOBus Bridge (rev 02)
	Subsystem: Janz Computer AG Device 0100
	Flags: medium devsel, IRQ 161
	Memory at febffc00 (32-bit, non-prefetchable) [size=128]
	I/O ports at ec00 [size=128]
	Memory at febfe000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfd000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfc000 (32-bit, non-prefetchable) [size=4K]
	Expansion ROM at 50000000 [disabled] [size=2K]

iws@...cwdc ~ $ lspci -v -s 01: -n
01:0d.0 0c09: 10b5:9030
	Subsystem: 13c3:0101
	Flags: medium devsel, IRQ 153
	Memory at febff800 (32-bit, non-prefetchable) [size=128]
	I/O ports at e880 [size=128]
	Memory at febfb000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfa000 (32-bit, non-prefetchable) [size=4K]
	Memory at febf9000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>

01:0e.0 0680: 10b5:9050 (rev 02)
	Subsystem: 13c3:0100
	Flags: medium devsel, IRQ 161
	Memory at febffc00 (32-bit, non-prefetchable) [size=128]
	I/O ports at ec00 [size=128]
	Memory at febfe000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfd000 (32-bit, non-prefetchable) [size=4K]
	Memory at febfc000 (32-bit, non-prefetchable) [size=4K]
	Expansion ROM at 50000000 [disabled] [size=2K]


Thanks,
Ira


> Signed-off-by: Pavel Cheblakov <P.B.Cheblakov@....nsk.su>
> Acked-by: Wolfgang Grandegger <wg@...ndegger.com>
> ---
>  drivers/net/can/sja1000/Kconfig   |   12 +
>  drivers/net/can/sja1000/Makefile  |    1 +
>  drivers/net/can/sja1000/plx_pci.c |  472 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 485 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/net/can/sja1000/plx_pci.c
> 
> diff --git a/drivers/net/can/sja1000/Kconfig b/drivers/net/can/sja1000/Kconfig
> index 4c67492..9e277d6 100644
> --- a/drivers/net/can/sja1000/Kconfig
> +++ b/drivers/net/can/sja1000/Kconfig
> @@ -44,4 +44,16 @@ config CAN_KVASER_PCI
>  	  This driver is for the the PCIcanx and PCIcan cards (1, 2 or
>  	  4 channel) from Kvaser (http://www.kvaser.com).
>  
> +config CAN_PLX_PCI
> +	tristate "PLX90xx PCI-bridge based Cards"
> +	depends on PCI
> +	---help---
> +	  This driver is for CAN interface cards based on
> +	  the PLX90xx PCI bridge.
> +	  Driver supports now:
> +	   - Adlink PCI-7841/cPCI-7841 card (http://www.adlinktech.com/)
> +	   - Adlink PCI-7841/cPCI-7841 SE card
> +	   - Marathon CAN-bus-PCI card (http://www.marathon.ru/)
> +	   - TEWS TECHNOLOGIES TPMC810 card (http://www.tews.com/)
> +
>  endif
> diff --git a/drivers/net/can/sja1000/Makefile b/drivers/net/can/sja1000/Makefile
> index 9d245ac..ce92455 100644
> --- a/drivers/net/can/sja1000/Makefile
> +++ b/drivers/net/can/sja1000/Makefile
> @@ -8,5 +8,6 @@ obj-$(CONFIG_CAN_SJA1000_PLATFORM) += sja1000_platform.o
>  obj-$(CONFIG_CAN_SJA1000_OF_PLATFORM) += sja1000_of_platform.o
>  obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
>  obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o
> +obj-$(CONFIG_CAN_PLX_PCI) += plx_pci.o
>  
>  ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
> diff --git a/drivers/net/can/sja1000/plx_pci.c b/drivers/net/can/sja1000/plx_pci.c
> new file mode 100644
> index 0000000..6b46a63
> --- /dev/null
> +++ b/drivers/net/can/sja1000/plx_pci.c
> @@ -0,0 +1,472 @@
> +/*
> + * Copyright (C) 2008-2010 Pavel Cheblakov <P.B.Cheblakov@....nsk.su>
> + *
> + * Derived from the ems_pci.c driver:
> + *	Copyright (C) 2007 Wolfgang Grandegger <wg@...ndegger.com>
> + *	Copyright (C) 2008 Markus Plessing <plessing@...-wuensche.com>
> + *	Copyright (C) 2008 Sebastian Haas <haas@...-wuensche.com>
> + *
> + * 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  "sja1000_plx_pci"
> +
> +MODULE_AUTHOR("Pavel Cheblakov <P.B.Cheblakov@....nsk.su>");
> +MODULE_DESCRIPTION("Socket-CAN driver for PLX90xx PCI-bridge cards with "
> +		   "the SJA1000 chips");
> +MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "
> +			"Adlink PCI-7841/cPCI-7841 SE, "
> +			"Marathon CAN-bus-PCI, "
> +			"TEWS TECHNOLOGIES TPMC810");
> +MODULE_LICENSE("GPL v2");
> +
> +#define PLX_PCI_MAX_CHAN 2
> +
> +struct plx_pci_card {
> +	int channels;			/* detected channels count */
> +	struct net_device *net_dev[PLX_PCI_MAX_CHAN];
> +	void __iomem *conf_addr;
> +};
> +
> +#define PLX_PCI_CAN_CLOCK (16000000 / 2)
> +
> +/* PLX90xx registers */
> +#define PLX_INTCSR	0x4c		/* Interrupt Control/Status */
> +#define PLX_CNTRL	0x50		/* User I/O, Direct Slave Response,
> +					 * Serial EEPROM, and Initialization
> +					 * Control register
> +					 */
> +
> +#define PLX_LINT1_EN	0x1		/* Local interrupt 1 enable */
> +#define PLX_LINT2_EN	(1 << 3)	/* Local interrupt 2 enable */
> +#define PLX_PCI_INT_EN	(1 << 6)	/* PCI Interrupt Enable */
> +#define PLX_PCI_RESET	(1 << 30)	/* PCI Adapter Software Reset */
> +
> +/*
> + * 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 PLX_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 7
> + * (meaning direct oscillator output) because the second SJA1000 chip
> + * is driven by the first one CLKOUT output.
> + */
> +#define PLX_PCI_CDR			(CDR_CBP | CDR_CLKOUT_MASK)
> +
> +/* SJA1000 Control Register in the BasicCAN Mode */
> +#define REG_CR				0x00
> +
> +/* States of some SJA1000 registers after hardware reset in the BasicCAN mode*/
> +#define REG_CR_BASICCAN_INITIAL		0x21
> +#define REG_CR_BASICCAN_INITIAL_MASK	0xa1
> +#define REG_SR_BASICCAN_INITIAL		0x0c
> +#define REG_IR_BASICCAN_INITIAL		0xe0
> +
> +/* States of some SJA1000 registers after hardware reset in the PeliCAN mode*/
> +#define REG_MOD_PELICAN_INITIAL		0x01
> +#define REG_SR_PELICAN_INITIAL		0x3c
> +#define REG_IR_PELICAN_INITIAL		0x00
> +
> +#define ADLINK_PCI_VENDOR_ID		0x144A
> +#define ADLINK_PCI_DEVICE_ID		0x7841
> +
> +#define MARATHON_PCI_DEVICE_ID		0x2715
> +
> +#define TEWS_PCI_VENDOR_ID		0x1498
> +#define TEWS_PCI_DEVICE_ID_TMPC810	0x032A
> +
> +static void plx_pci_reset_common(struct pci_dev *pdev);
> +static void plx_pci_reset_marathon(struct pci_dev *pdev);
> +
> +struct plx_pci_channel_map {
> +	u32 bar;
> +	u32 offset;
> +	u32 size;		/* 0x00 - auto, e.g. length of entire bar */
> +};
> +
> +struct plx_pci_card_info {
> +	const char *name;
> +	int channel_count;
> +	u32 can_clock;
> +	u8 ocr;			/* output control register */
> +	u8 cdr;			/* clock divider register */
> +
> +	/* Parameters for mapping local configuration space */
> +	struct plx_pci_channel_map conf_map;
> +
> +	/* Parameters for mapping the SJA1000 chips */
> +	struct plx_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CHAN];
> +
> +	/* Pointer to device-dependent reset function */
> +	void (*reset_func)(struct pci_dev *pdev);
> +};
> +
> +static struct plx_pci_card_info plx_pci_card_info_adlink __devinitdata = {
> +	"Adlink PCI-7841/cPCI-7841", 2,
> +	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
> +	{1, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
> +	&plx_pci_reset_common
> +	/* based on PLX9052 */
> +};
> +
> +static struct plx_pci_card_info plx_pci_card_info_adlink_se __devinitdata = {
> +	"Adlink PCI-7841/cPCI-7841 SE", 2,
> +	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
> +	{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
> +	&plx_pci_reset_common
> +	/* based on PLX9052 */
> +};
> +
> +static struct plx_pci_card_info plx_pci_card_info_marathon __devinitdata = {
> +	"Marathon CAN-bus-PCI", 2,
> +	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
> +	{0, 0x00, 0x00}, { {2, 0x00, 0x00}, {4, 0x00, 0x00} },
> +	&plx_pci_reset_marathon
> +	/* based on PLX9052 */
> +};
> +
> +static struct plx_pci_card_info plx_pci_card_info_tews __devinitdata = {
> +	"TEWS TECHNOLOGIES TPMC810", 2,
> +	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
> +	{0, 0x00, 0x00}, { {2, 0x000, 0x80}, {2, 0x100, 0x80} },
> +	&plx_pci_reset_common
> +	/* based on PLX9030 */
> +};
> +
> +static DEFINE_PCI_DEVICE_TABLE(plx_pci_tbl) = {
> +	{
> +		/* Adlink PCI-7841/cPCI-7841 */
> +		ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
> +		PCI_ANY_ID, PCI_ANY_ID,
> +		PCI_CLASS_NETWORK_OTHER << 8, ~0,
> +		(kernel_ulong_t)&plx_pci_card_info_adlink
> +	},
> +	{
> +		/* Adlink PCI-7841/cPCI-7841 SE */
> +		ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
> +		PCI_ANY_ID, PCI_ANY_ID,
> +		PCI_CLASS_COMMUNICATION_OTHER << 8, ~0,
> +		(kernel_ulong_t)&plx_pci_card_info_adlink_se
> +	},
> +	{
> +		/* Marathon CAN-bus-PCI card */
> +		PCI_VENDOR_ID_PLX, MARATHON_PCI_DEVICE_ID,
> +		PCI_ANY_ID, PCI_ANY_ID,
> +		0, 0,
> +		(kernel_ulong_t)&plx_pci_card_info_marathon
> +	},
> +	{
> +		/* TEWS TECHNOLOGIES TPMC810 card */
> +		TEWS_PCI_VENDOR_ID, TEWS_PCI_DEVICE_ID_TMPC810,
> +		PCI_ANY_ID, PCI_ANY_ID,
> +		0, 0,
> +		(kernel_ulong_t)&plx_pci_card_info_tews
> +	},
> +	{ 0,}
> +};
> +MODULE_DEVICE_TABLE(pci, plx_pci_tbl);
> +
> +static u8 plx_pci_read_reg(const struct sja1000_priv *priv, int port)
> +{
> +	return ioread8(priv->reg_base + port);
> +}
> +
> +static void plx_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val)
> +{
> +	iowrite8(val, priv->reg_base + port);
> +}
> +
> +/*
> + * Check if a CAN controller is present at the specified location
> + * by trying to switch 'em from the Basic mode into the PeliCAN mode.
> + * Also check states of some registers in reset mode.
> + */
> +static inline int plx_pci_check_sja1000(const struct sja1000_priv *priv)
> +{
> +	int flag = 0;
> +
> +	/*
> +	 * Check registers after hardware reset (the Basic mode)
> +	 * See states on p. 10 of the Datasheet.
> +	 */
> +	if ((priv->read_reg(priv, REG_CR) & REG_CR_BASICCAN_INITIAL_MASK) ==
> +	    REG_CR_BASICCAN_INITIAL &&
> +	    (priv->read_reg(priv, REG_SR) == REG_SR_BASICCAN_INITIAL) &&
> +	    (priv->read_reg(priv, REG_IR) == REG_IR_BASICCAN_INITIAL))
> +		flag = 1;
> +
> +	/* Bring the SJA1000 into the PeliCAN mode*/
> +	priv->write_reg(priv, REG_CDR, CDR_PELICAN);
> +
> +	/*
> +	 * Check registers after reset in the PeliCAN mode.
> +	 * See states on p. 23 of the Datasheet.
> +	 */
> +	if (priv->read_reg(priv, REG_MOD) == REG_MOD_PELICAN_INITIAL &&
> +	    priv->read_reg(priv, REG_SR) == REG_SR_PELICAN_INITIAL &&
> +	    priv->read_reg(priv, REG_IR) == REG_IR_PELICAN_INITIAL)
> +		return flag;
> +
> +	return 0;
> +}
> +
> +/*
> + * PLX90xx software reset
> + * Also LRESET# asserts and brings to reset device on the Local Bus (if wired).
> + * For most cards it's enough for reset the SJA1000 chips.
> + */
> +static void plx_pci_reset_common(struct pci_dev *pdev)
> +{
> +	struct plx_pci_card *card = pci_get_drvdata(pdev);
> +	u32 cntrl;
> +
> +	cntrl = ioread32(card->conf_addr + PLX_CNTRL);
> +	cntrl |= PLX_PCI_RESET;
> +	iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
> +	udelay(100);
> +	cntrl ^= PLX_PCI_RESET;
> +	iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
> +};
> +
> +/* Special reset function for Marathon card */
> +static void plx_pci_reset_marathon(struct pci_dev *pdev)
> +{
> +	void __iomem *reset_addr;
> +	int i;
> +	int reset_bar[2] = {3, 5};
> +
> +	plx_pci_reset_common(pdev);
> +
> +	for (i = 0; i < 2; i++) {
> +		reset_addr = pci_iomap(pdev, reset_bar[i], 0);
> +		if (!reset_addr) {
> +			dev_err(&pdev->dev, "Failed to remap reset "
> +				"space %d (BAR%d)\n", i, reset_bar[i]);
> +		} else {
> +			/* reset the SJA1000 chip */
> +			iowrite8(0x1, reset_addr);
> +			udelay(100);
> +			pci_iounmap(pdev, reset_addr);
> +		}
> +	}
> +}
> +
> +static void plx_pci_del_card(struct pci_dev *pdev)
> +{
> +	struct plx_pci_card *card = pci_get_drvdata(pdev);
> +	struct net_device *dev;
> +	struct sja1000_priv *priv;
> +	int i = 0;
> +
> +	for (i = 0; i < card->channels; i++) {
> +		dev = card->net_dev[i];
> +		if (!dev)
> +			continue;
> +
> +		dev_info(&pdev->dev, "Removing %s\n", dev->name);
> +		unregister_sja1000dev(dev);
> +		priv = netdev_priv(dev);
> +		if (priv->reg_base)
> +			pci_iounmap(pdev, priv->reg_base);
> +		free_sja1000dev(dev);
> +	}
> +
> +	plx_pci_reset_common(pdev);
> +
> +	/*
> +	 * Disable interrupts from PCI-card (PLX90xx) and disable Local_1,
> +	 * Local_2 interrupts
> +	 */
> +	iowrite32(0x0, card->conf_addr + PLX_INTCSR);
> +
> +	if (card->conf_addr)
> +		pci_iounmap(pdev, card->conf_addr);
> +
> +	kfree(card);
> +
> +	pci_disable_device(pdev);
> +	pci_set_drvdata(pdev, NULL);
> +}
> +
> +/*
> + * Probe PLX90xx based device for the SJA1000 chips and register each
> + * available CAN channel to SJA1000 Socket-CAN subsystem.
> + */
> +static int __devinit plx_pci_add_card(struct pci_dev *pdev,
> +				      const struct pci_device_id *ent)
> +{
> +	struct sja1000_priv *priv;
> +	struct net_device *dev;
> +	struct plx_pci_card *card;
> +	struct plx_pci_card_info *ci;
> +	int err, i;
> +	u32 val;
> +	void __iomem *addr;
> +
> +	ci = (struct plx_pci_card_info *)ent->driver_data;
> +
> +	if (pci_enable_device(pdev) < 0) {
> +		dev_err(&pdev->dev, "Failed to enable PCI device\n");
> +		return -ENODEV;
> +	}
> +
> +	dev_info(&pdev->dev, "Detected \"%s\" card at slot #%i\n",
> +		 ci->name, PCI_SLOT(pdev->devfn));
> +
> +	/* Allocate card structures to hold addresses, ... */
> +	card = kzalloc(sizeof(*card), GFP_KERNEL);
> +	if (!card) {
> +		dev_err(&pdev->dev, "Unable to allocate memory\n");
> +		pci_disable_device(pdev);
> +		return -ENOMEM;
> +	}
> +
> +	pci_set_drvdata(pdev, card);
> +
> +	card->channels = 0;
> +
> +	/* Remap PLX90xx configuration space */
> +	addr = pci_iomap(pdev, ci->conf_map.bar, ci->conf_map.size);
> +	if (!addr) {
> +		err = -ENOMEM;
> +		dev_err(&pdev->dev, "Failed to remap configuration space "
> +			"(BAR%d)\n", ci->conf_map.bar);
> +		goto failure_cleanup;
> +	}
> +	card->conf_addr = addr + ci->conf_map.offset;
> +
> +	ci->reset_func(pdev);
> +
> +	/* Detect available channels */
> +	for (i = 0; i < ci->channel_count; i++) {
> +		struct plx_pci_channel_map *cm = &ci->chan_map_tbl[i];
> +
> +		dev = alloc_sja1000dev(0);
> +		if (!dev) {
> +			err = -ENOMEM;
> +			goto failure_cleanup;
> +		}
> +
> +		card->net_dev[i] = dev;
> +		priv = netdev_priv(dev);
> +		priv->priv = card;
> +		priv->irq_flags = IRQF_SHARED;
> +
> +		dev->irq = pdev->irq;
> +
> +		/*
> +		 * Remap IO space of the SJA1000 chips
> +		 * This is device-dependent mapping
> +		 */
> +		addr = pci_iomap(pdev, cm->bar, cm->size);
> +		if (!addr) {
> +			err = -ENOMEM;
> +			dev_err(&pdev->dev, "Failed to remap BAR%d\n", cm->bar);
> +			goto failure_cleanup;
> +		}
> +
> +		priv->reg_base = addr + cm->offset;
> +		priv->read_reg = plx_pci_read_reg;
> +		priv->write_reg = plx_pci_write_reg;
> +
> +		/* Check if channel is present */
> +		if (plx_pci_check_sja1000(priv)) {
> +			priv->can.clock.freq = ci->can_clock;
> +			priv->ocr = ci->ocr;
> +			priv->cdr = ci->cdr;
> +
> +			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);
> +				free_sja1000dev(dev);
> +				goto failure_cleanup;
> +			}
> +
> +			card->channels++;
> +
> +			dev_info(&pdev->dev, "Channel #%d at 0x%p, irq %d "
> +				 "registered as %s\n", i + 1, priv->reg_base,
> +				 dev->irq, dev->name);
> +		} else {
> +			dev_err(&pdev->dev, "Channel #%d not detected\n",
> +				i + 1);
> +			free_sja1000dev(dev);
> +		}
> +	}
> +
> +	if (!card->channels) {
> +		err = -ENODEV;
> +		goto failure_cleanup;
> +	}
> +
> +	/*
> +	 * Enable interrupts from PCI-card (PLX90xx) and enable Local_1,
> +	 * Local_2 interrupts from the SJA1000 chips
> +	 */
> +	val = ioread32(card->conf_addr + PLX_INTCSR);
> +	val |= PLX_LINT1_EN | PLX_LINT2_EN | PLX_PCI_INT_EN;
> +	iowrite32(val, card->conf_addr + PLX_INTCSR);
> +
> +	return 0;
> +
> +failure_cleanup:
> +	dev_err(&pdev->dev, "Error: %d. Cleaning Up.\n", err);
> +
> +	plx_pci_del_card(pdev);
> +
> +	return err;
> +}
> +
> +static struct pci_driver plx_pci_driver = {
> +	.name = DRV_NAME,
> +	.id_table = plx_pci_tbl,
> +	.probe = plx_pci_add_card,
> +	.remove = plx_pci_del_card,
> +};
> +
> +static int __init plx_pci_init(void)
> +{
> +	return pci_register_driver(&plx_pci_driver);
> +}
> +
> +static void __exit plx_pci_exit(void)
> +{
> +	pci_unregister_driver(&plx_pci_driver);
> +}
> +
> +module_init(plx_pci_init);
> +module_exit(plx_pci_exit);
> -- 
> 1.6.0.6
> 
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