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linux/drivers/net/can/sja1000/plx_pci.c
Greg Kroah-Hartman 1dd06ae8db drivers/net: fix up function prototypes after __dev* removals 
The __dev* removal patches for the network drivers ended up messing up
the function prototypes for a bunch of drivers.  This patch fixes all of
them back up to be properly aligned.

Bonus is that this almost removes 100 lines of code, always a nice
surprise.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-07 14:22:22 -05:00

632 lines
17 KiB
C
Raw Blame History

/*
* Copyright (C) 2008-2010 Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>
*
* Derived from the ems_pci.c driver:
* Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
* Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
* Copyright (C) 2008 Sebastian Haas <haas@ems-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/slab.h>
#include <linux/pci.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@inp.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, "
"esd CAN-PCI/CPCI/PCI104/200, "
"esd CAN-PCI/PMC/266, "
"esd CAN-PCIe/2000, "
"Connect Tech Inc. CANpro/104-Plus Opto (CRG001), "
"IXXAT PC-I 04/PCI")
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;
/* Pointer to device-dependent reset function */
void (*reset_func)(struct pci_dev *pdev);
};
#define PLX_PCI_CAN_CLOCK (16000000 / 2)
/* PLX9030/9050/9052 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 */
/* PLX9056 registers */
#define PLX9056_INTCSR 0x68 /* Interrupt Control/Status */
#define PLX9056_CNTRL 0x6c /* Control / Software Reset */
#define PLX9056_LINTI (1 << 11)
#define PLX9056_PCI_INT_EN (1 << 8)
#define PLX9056_PCI_RCR (1 << 29) /* Read Configuration Registers */
/*
* 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 ESD_PCI_SUB_SYS_ID_PCI200 0x0004
#define ESD_PCI_SUB_SYS_ID_PCI266 0x0009
#define ESD_PCI_SUB_SYS_ID_PMC266 0x000e
#define ESD_PCI_SUB_SYS_ID_CPCI200 0x010b
#define ESD_PCI_SUB_SYS_ID_PCIE2000 0x0200
#define ESD_PCI_SUB_SYS_ID_PCI104200 0x0501
#define IXXAT_PCI_VENDOR_ID 0x10b5
#define IXXAT_PCI_DEVICE_ID 0x9050
#define IXXAT_PCI_SUB_SYS_ID 0x2540
#define MARATHON_PCI_DEVICE_ID 0x2715
#define TEWS_PCI_VENDOR_ID 0x1498
#define TEWS_PCI_DEVICE_ID_TMPC810 0x032A
#define CTI_PCI_VENDOR_ID 0x12c4
#define CTI_PCI_DEVICE_ID_CRG001 0x0900
static void plx_pci_reset_common(struct pci_dev *pdev);
static void plx_pci_reset_marathon(struct pci_dev *pdev);
static void plx9056_pci_reset_common(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 = {
"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 = {
"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_esd200 = {
"esd CAN-PCI/CPCI/PCI104/200", 2,
PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
&plx_pci_reset_common
/* based on PLX9030/9050 */
};
static struct plx_pci_card_info plx_pci_card_info_esd266 = {
"esd CAN-PCI/PMC/266", 2,
PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
&plx9056_pci_reset_common
/* based on PLX9056 */
};
static struct plx_pci_card_info plx_pci_card_info_esd2000 = {
"esd CAN-PCIe/2000", 2,
PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
&plx9056_pci_reset_common
/* based on PEX8311 */
};
static struct plx_pci_card_info plx_pci_card_info_ixxat = {
"IXXAT PC-I 04/PCI", 2,
PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x200, 0x80} },
&plx_pci_reset_common
/* based on PLX9050 */
};
static struct plx_pci_card_info plx_pci_card_info_marathon = {
"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 = {
"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 struct plx_pci_card_info plx_pci_card_info_cti = {
"Connect Tech Inc. CANpro/104-Plus Opto (CRG001)", 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
},
{
/* esd CAN-PCI/200 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI200,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd200
},
{
/* esd CAN-CPCI/200 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_CPCI200,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd200
},
{
/* esd CAN-PCI104/200 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI104200,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd200
},
{
/* esd CAN-PCI/266 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI266,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd266
},
{
/* esd CAN-PMC/266 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PMC266,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd266
},
{
/* esd CAN-PCIE/2000 */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCIE2000,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_esd2000
},
{
/* IXXAT PC-I 04/PCI card */
IXXAT_PCI_VENDOR_ID, IXXAT_PCI_DEVICE_ID,
PCI_ANY_ID, IXXAT_PCI_SUB_SYS_ID,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_ixxat
},
{
/* 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
},
{
/* Connect Tech Inc. CANpro/104-Plus Opto (CRG001) card */
PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
CTI_PCI_VENDOR_ID, CTI_PCI_DEVICE_ID_CRG001,
0, 0,
(kernel_ulong_t)&plx_pci_card_info_cti
},
{ 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;
}
/*
* PLX9030/50/52 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);
};
/*
* PLX9056 software reset
* Assert LRESET# and reset device(s) on the Local Bus (if wired).
*/
static void plx9056_pci_reset_common(struct pci_dev *pdev)
{
struct plx_pci_card *card = pci_get_drvdata(pdev);
u32 cntrl;
/* issue a local bus reset */
cntrl = ioread32(card->conf_addr + PLX9056_CNTRL);
cntrl |= PLX_PCI_RESET;
iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
udelay(100);
cntrl ^= PLX_PCI_RESET;
iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
/* reload local configuration from EEPROM */
cntrl |= PLX9056_PCI_RCR;
iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
/*
* There is no safe way to poll for the end
* of reconfiguration process. Waiting for 10ms
* is safe.
*/
mdelay(10);
cntrl ^= PLX9056_PCI_RCR;
iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
};
/* Special reset function for Marathon card */
static void plx_pci_reset_marathon(struct pci_dev *pdev)
{
void __iomem *reset_addr;
int i;
static const 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 < PLX_PCI_MAX_CHAN; 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);
}
card->reset_func(pdev);
/*
* Disable interrupts from PCI-card and disable local
* interrupts
*/
if (pdev->device != PCI_DEVICE_ID_PLX_9056)
iowrite32(0x0, card->conf_addr + PLX_INTCSR);
else
iowrite32(0x0, card->conf_addr + PLX9056_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 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);
card->reset_func = ci->reset_func;
/* 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);
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);
card->net_dev[i] = NULL;
}
}
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
*/
if (pdev->device != PCI_DEVICE_ID_PLX_9056) {
val = ioread32(card->conf_addr + PLX_INTCSR);
if (pdev->subsystem_vendor == PCI_VENDOR_ID_ESDGMBH)
val |= PLX_LINT1_EN | PLX_PCI_INT_EN;
else
val |= PLX_LINT1_EN | PLX_LINT2_EN | PLX_PCI_INT_EN;
iowrite32(val, card->conf_addr + PLX_INTCSR);
} else {
iowrite32(PLX9056_LINTI | PLX9056_PCI_INT_EN,
card->conf_addr + PLX9056_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,
};
module_pci_driver(plx_pci_driver);
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