Linux-2.6.33.2/drivers/net/tokenring/skisa.c
/*
* skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
*
* Based on tmspci written 1999 by Adam Fritzler
*
* Written 2000 by Jochen Friedrich
* Dedicated to my girlfriend Steffi Bopp
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* This driver module supports the following cards:
* - SysKonnect TR4/16(+) ISA (SK-4190)
*
* Maintainer(s):
* AF Adam Fritzler
* JF Jochen Friedrich jochen@scram.de
*
* Modification History:
* 14-Jan-01 JF Created
* 28-Oct-02 JF Fixed probe of card for static compilation.
* Fixed module init to not make hotplug go wild.
* 09-Nov-02 JF Fixed early bail out on out of memory
* situations if multiple cards are found.
* Cleaned up some unnecessary console SPAM.
* 09-Dec-02 JF Fixed module reference counting.
* 02-Jan-03 JF Renamed to skisa.c
*
*/
static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pci.h>
#include <asm/dma.h>
#include "tms380tr.h"
#define SK_ISA_IO_EXTENT 32
/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int portlist[] __initdata = {
0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
0
};
/* A zero-terminated list of IRQs to be probed.
* Used again after initial probe for sktr_chipset_init, called from sktr_open.
*/
static const unsigned short irqlist[] = {
3, 5, 9, 10, 11, 12, 15,
0
};
/* A zero-terminated list of DMAs to be probed. */
static int dmalist[] __initdata = {
5, 6, 7,
0
};
static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
static u64 dma_mask = ISA_MAX_ADDRESS;
static int sk_isa_open(struct net_device *dev);
static void sk_isa_read_eeprom(struct net_device *dev);
static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
{
return inb(dev->base_addr + reg);
}
static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
{
return inw(dev->base_addr + reg);
}
static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
{
outb(val, dev->base_addr + reg);
}
static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
{
outw(val, dev->base_addr + reg);
}
static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
{
unsigned char old, chk1, chk2;
if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
return -ENODEV;
old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
chk1 = 0; /* Begin with check value 0 */
do {
/* Write new SIFADR value */
outb(chk1, ioaddr + SIFADR);
/* Read, invert and write */
chk2 = inb(ioaddr + SIFADD);
chk2 ^= 0x0FE;
outb(chk2, ioaddr + SIFADR);
/* Read, invert and compare */
chk2 = inb(ioaddr + SIFADD);
chk2 ^= 0x0FE;
if(chk1 != chk2) {
release_region(ioaddr, SK_ISA_IO_EXTENT);
return -ENODEV;
}
chk1 -= 2;
} while(chk1 != 0); /* Repeat 128 times (all byte values) */
/* Restore the SIFADR value */
outb(old, ioaddr + SIFADR);
dev->base_addr = ioaddr;
return 0;
}
static struct net_device_ops sk_isa_netdev_ops __read_mostly;
static int __init setup_card(struct net_device *dev, struct device *pdev)
{
struct net_local *tp;
static int versionprinted;
const unsigned *port;
int j, err = 0;
if (!dev)
return -ENOMEM;
if (dev->base_addr) /* probe specific location */
err = sk_isa_probe1(dev, dev->base_addr);
else {
for (port = portlist; *port; port++) {
err = sk_isa_probe1(dev, *port);
if (!err)
break;
}
}
if (err)
goto out5;
/* At this point we have found a valid card. */
if (versionprinted++ == 0)
printk(KERN_DEBUG "%s", version);
err = -EIO;
pdev->dma_mask = &dma_mask;
if (tmsdev_init(dev, pdev))
goto out4;
dev->base_addr &= ~3;
sk_isa_read_eeprom(dev);
printk(KERN_DEBUG "skisa.c: Ring Station Address: %pM\n",
dev->dev_addr);
tp = netdev_priv(dev);
tp->setnselout = sk_isa_setnselout_pins;
tp->sifreadb = sk_isa_sifreadb;
tp->sifreadw = sk_isa_sifreadw;
tp->sifwriteb = sk_isa_sifwriteb;
tp->sifwritew = sk_isa_sifwritew;
memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
tp->tmspriv = NULL;
dev->netdev_ops = &sk_isa_netdev_ops;
if (dev->irq == 0)
{
for(j = 0; irqlist[j] != 0; j++)
{
dev->irq = irqlist[j];
if (!request_irq(dev->irq, tms380tr_interrupt, 0,
isa_cardname, dev))
break;
}
if(irqlist[j] == 0)
{
printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
goto out3;
}
}
else
{
for(j = 0; irqlist[j] != 0; j++)
if (irqlist[j] == dev->irq)
break;
if (irqlist[j] == 0)
{
printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
dev->irq);
goto out3;
}
if (request_irq(dev->irq, tms380tr_interrupt, 0,
isa_cardname, dev))
{
printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
dev->irq);
goto out3;
}
}
if (dev->dma == 0)
{
for(j = 0; dmalist[j] != 0; j++)
{
dev->dma = dmalist[j];
if (!request_dma(dev->dma, isa_cardname))
break;
}
if(dmalist[j] == 0)
{
printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
goto out2;
}
}
else
{
for(j = 0; dmalist[j] != 0; j++)
if (dmalist[j] == dev->dma)
break;
if (dmalist[j] == 0)
{
printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
dev->dma);
goto out2;
}
if (request_dma(dev->dma, isa_cardname))
{
printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
dev->dma);
goto out2;
}
}
err = register_netdev(dev);
if (err)
goto out;
printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
dev->name, dev->base_addr, dev->irq, dev->dma);
return 0;
out:
free_dma(dev->dma);
out2:
free_irq(dev->irq, dev);
out3:
tmsdev_term(dev);
out4:
release_region(dev->base_addr, SK_ISA_IO_EXTENT);
out5:
return err;
}
/*
* Reads MAC address from adapter RAM, which should've read it from
* the onboard ROM.
*
* Calling this on a board that does not support it can be a very
* dangerous thing. The Madge board, for instance, will lock your
* machine hard when this is called. Luckily, its supported in a
* separate driver. --ASF
*/
static void sk_isa_read_eeprom(struct net_device *dev)
{
int i;
/* Address: 0000:0000 */
sk_isa_sifwritew(dev, 0, SIFADX);
sk_isa_sifwritew(dev, 0, SIFADR);
/* Read six byte MAC address data */
dev->addr_len = 6;
for(i = 0; i < 6; i++)
dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
}
static unsigned short sk_isa_setnselout_pins(struct net_device *dev)
{
return 0;
}
static int sk_isa_open(struct net_device *dev)
{
struct net_local *tp = netdev_priv(dev);
unsigned short val = 0;
unsigned short oldval;
int i;
val = 0;
for(i = 0; irqlist[i] != 0; i++)
{
if(irqlist[i] == dev->irq)
break;
}
val |= CYCLE_TIME << 2;
val |= i << 4;
i = dev->dma - 5;
val |= i;
if(tp->DataRate == SPEED_4)
val |= LINE_SPEED_BIT;
else
val &= ~LINE_SPEED_BIT;
oldval = sk_isa_sifreadb(dev, POSREG);
/* Leave cycle bits alone */
oldval |= 0xf3;
val &= oldval;
sk_isa_sifwriteb(dev, val, POSREG);
return tms380tr_open(dev);
}
#define ISATR_MAX_ADAPTERS 3
static int io[ISATR_MAX_ADAPTERS];
static int irq[ISATR_MAX_ADAPTERS];
static int dma[ISATR_MAX_ADAPTERS];
MODULE_LICENSE("GPL");
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(dma, int, NULL, 0);
static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
static struct platform_driver sk_isa_driver = {
.driver = {
.name = "skisa",
},
};
static int __init sk_isa_init(void)
{
struct net_device *dev;
struct platform_device *pdev;
int i, num = 0, err = 0;
sk_isa_netdev_ops = tms380tr_netdev_ops;
sk_isa_netdev_ops.ndo_open = sk_isa_open;
sk_isa_netdev_ops.ndo_stop = tms380tr_close;
err = platform_driver_register(&sk_isa_driver);
if (err)
return err;
for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
dev = alloc_trdev(sizeof(struct net_local));
if (!dev)
continue;
dev->base_addr = io[i];
dev->irq = irq[i];
dev->dma = dma[i];
pdev = platform_device_register_simple("skisa",
i, NULL, 0);
if (IS_ERR(pdev)) {
free_netdev(dev);
continue;
}
err = setup_card(dev, &pdev->dev);
if (!err) {
sk_isa_dev[i] = pdev;
platform_set_drvdata(sk_isa_dev[i], dev);
++num;
} else {
platform_device_unregister(pdev);
free_netdev(dev);
}
}
printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
/* Probe for cards. */
if (num == 0) {
printk(KERN_NOTICE "skisa.c: No cards found.\n");
platform_driver_unregister(&sk_isa_driver);
return -ENODEV;
}
return 0;
}
static void __exit sk_isa_cleanup(void)
{
struct net_device *dev;
int i;
for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
struct platform_device *pdev = sk_isa_dev[i];
if (!pdev)
continue;
dev = platform_get_drvdata(pdev);
unregister_netdev(dev);
release_region(dev->base_addr, SK_ISA_IO_EXTENT);
free_irq(dev->irq, dev);
free_dma(dev->dma);
tmsdev_term(dev);
free_netdev(dev);
platform_set_drvdata(pdev, NULL);
platform_device_unregister(pdev);
}
platform_driver_unregister(&sk_isa_driver);
}
module_init(sk_isa_init);
module_exit(sk_isa_cleanup);