412 lines
10 KiB
C
412 lines
10 KiB
C
|
/*
|
||
|
|
* 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);
|