[TG3]: Set minimal hw interrupt mitigation.

[linux-2.6/verdex.git] / drivers / net / tokenring / madgemc.c

/*
 *  madgemc.c: Driver for the Madge Smart 16/4 MC16 MCA token ring card.
 *
 *  Written 2000 by Adam Fritzler
 *
 *  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:
 *      - Madge Smart 16/4 Ringnode MC16
 *      - Madge Smart 16/4 Ringnode MC32 (??)
 *
 *  Maintainer(s):
 *    AF        Adam Fritzler           mid@auk.cx
 *
 *  Modification History:
 *      16-Jan-00       AF      Created
 *
 */
static const char version[] = "madgemc.c: v0.91 23/01/2000 by Adam Fritzler\n";

#include <linux/module.h>
#include <linux/mca-legacy.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 <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>

#include "tms380tr.h"
#include "madgemc.h"            /* Madge-specific constants */

#define MADGEMC_IO_EXTENT 32
#define MADGEMC_SIF_OFFSET 0x08

struct madgemc_card {
        struct net_device *dev;

        /*
         * These are read from the BIA ROM.
         */
        unsigned int manid;
        unsigned int cardtype;
        unsigned int cardrev;
        unsigned int ramsize;
        
        /*
         * These are read from the MCA POS registers.  
         */
        unsigned int burstmode:2;
        unsigned int fairness:1; /* 0 = Fair, 1 = Unfair */
        unsigned int arblevel:4;
        unsigned int ringspeed:2; /* 0 = 4mb, 1 = 16, 2 = Auto/none */
        unsigned int cabletype:1; /* 0 = RJ45, 1 = DB9 */

        struct madgemc_card *next;
};
static struct madgemc_card *madgemc_card_list;


static int madgemc_open(struct net_device *dev);
static int madgemc_close(struct net_device *dev);
static int madgemc_chipset_init(struct net_device *dev);
static void madgemc_read_rom(struct madgemc_card *card);
static unsigned short madgemc_setnselout_pins(struct net_device *dev);
static void madgemc_setcabletype(struct net_device *dev, int type);

static int madgemc_mcaproc(char *buf, int slot, void *d);

static void madgemc_setregpage(struct net_device *dev, int page);
static void madgemc_setsifsel(struct net_device *dev, int val);
static void madgemc_setint(struct net_device *dev, int val);

static irqreturn_t madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs);

/*
 * These work around paging, however they don't guarentee you're on the
 * right page.
 */
#define SIFREADB(reg) (inb(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
#define SIFWRITEB(val, reg) (outb(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
#define SIFREADW(reg) (inw(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
#define SIFWRITEW(val, reg) (outw(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))

/*
 * Read a byte-length value from the register.
 */
static unsigned short madgemc_sifreadb(struct net_device *dev, unsigned short reg)
{
        unsigned short ret;
        if (reg<0x8)    
                ret = SIFREADB(reg);
        else {
                madgemc_setregpage(dev, 1);     
                ret = SIFREADB(reg);
                madgemc_setregpage(dev, 0);
        }
        return ret;
}

/*
 * Write a byte-length value to a register.
 */
static void madgemc_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
{
        if (reg<0x8)
                SIFWRITEB(val, reg);
        else {
                madgemc_setregpage(dev, 1);
                SIFWRITEB(val, reg);
                madgemc_setregpage(dev, 0);
        }
        return;
}

/*
 * Read a word-length value from a register
 */
static unsigned short madgemc_sifreadw(struct net_device *dev, unsigned short reg)
{
        unsigned short ret;
        if (reg<0x8)    
                ret = SIFREADW(reg);
        else {
                madgemc_setregpage(dev, 1);     
                ret = SIFREADW(reg);
                madgemc_setregpage(dev, 0);
        }
        return ret;
}

/*
 * Write a word-length value to a register.
 */
static void madgemc_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
{
        if (reg<0x8)
                SIFWRITEW(val, reg);
        else {
                madgemc_setregpage(dev, 1);
                SIFWRITEW(val, reg);
                madgemc_setregpage(dev, 0);
        }
        return;
}



static int __init madgemc_probe(void)
{       
        static int versionprinted;
        struct net_device *dev;
        struct net_local *tp;
        struct madgemc_card *card;
        int i,slot = 0;
        __u8 posreg[4];

        if (!MCA_bus)
                return -1;      
 
        while (slot != MCA_NOTFOUND) {
                /*
                 * Currently we only support the MC16/32 (MCA ID 002d)
                 */
                slot = mca_find_unused_adapter(0x002d, slot);
                if (slot == MCA_NOTFOUND)
                        break;

                /*
                 * If we get here, we have an adapter.
                 */
                if (versionprinted++ == 0)
                        printk("%s", version);

                dev = alloc_trdev(sizeof(struct net_local));
                if (dev == NULL) {
                        printk("madgemc: unable to allocate dev space\n");
                        if (madgemc_card_list)
                                return 0;
                        return -1;
                }

                SET_MODULE_OWNER(dev);
                dev->dma = 0;

                /*
                 * Fetch MCA config registers
                 */
                for(i=0;i<4;i++)
                        posreg[i] = mca_read_stored_pos(slot, i+2);
                
                card = kmalloc(sizeof(struct madgemc_card), GFP_KERNEL);
                if (card==NULL) {
                        printk("madgemc: unable to allocate card struct\n");
                        free_netdev(dev);
                        if (madgemc_card_list)
                                return 0;
                        return -1;
                }
                card->dev = dev;

                /*
                 * Parse configuration information.  This all comes
                 * directly from the publicly available @002d.ADF.
                 * Get it from Madge or your local ADF library.
                 */

                /*
                 * Base address 
                 */
                dev->base_addr = 0x0a20 + 
                        ((posreg[2] & MC16_POS2_ADDR2)?0x0400:0) +
                        ((posreg[0] & MC16_POS0_ADDR1)?0x1000:0) +
                        ((posreg[3] & MC16_POS3_ADDR3)?0x2000:0);

                /*
                 * Interrupt line
                 */
                switch(posreg[0] >> 6) { /* upper two bits */
                case 0x1: dev->irq = 3; break;
                case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
                case 0x3: dev->irq = 10; break;
                default: dev->irq = 0; break;
                }

                if (dev->irq == 0) {
                        printk("%s: invalid IRQ\n", dev->name);
                        goto getout1;
                }

                if (!request_region(dev->base_addr, MADGEMC_IO_EXTENT, 
                                   "madgemc")) {
                        printk(KERN_INFO "madgemc: unable to setup Smart MC in slot %d because of I/O base conflict at 0x%04lx\n", slot, dev->base_addr);
                        dev->base_addr += MADGEMC_SIF_OFFSET;
                        goto getout1;
                }
                dev->base_addr += MADGEMC_SIF_OFFSET;
                
                /*
                 * Arbitration Level
                 */
                card->arblevel = ((posreg[0] >> 1) & 0x7) + 8;

                /*
                 * Burst mode and Fairness
                 */
                card->burstmode = ((posreg[2] >> 6) & 0x3);
                card->fairness = ((posreg[2] >> 4) & 0x1);

                /*
                 * Ring Speed
                 */
                if ((posreg[1] >> 2)&0x1)
                        card->ringspeed = 2; /* not selected */
                else if ((posreg[2] >> 5) & 0x1)
                        card->ringspeed = 1; /* 16Mb */
                else
                        card->ringspeed = 0; /* 4Mb */

                /* 
                 * Cable type
                 */
                if ((posreg[1] >> 6)&0x1)
                        card->cabletype = 1; /* STP/DB9 */
                else
                        card->cabletype = 0; /* UTP/RJ-45 */


                /* 
                 * ROM Info. This requires us to actually twiddle
                 * bits on the card, so we must ensure above that 
                 * the base address is free of conflict (request_region above).
                 */
                madgemc_read_rom(card);
                
                if (card->manid != 0x4d) { /* something went wrong */
                        printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
                        goto getout;
                }
                
                if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
                        printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
                        goto getout;
                }
               
                /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
                if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
                        card->ramsize = 128;
                else
                        card->ramsize = 256;

                printk("%s: %s Rev %d at 0x%04lx IRQ %d\n", 
                       dev->name, 
                       (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
                       MADGEMC32_CARDNAME, card->cardrev, 
                       dev->base_addr, dev->irq);

                if (card->cardtype == 0x0d)
                        printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
                
                if (card->ringspeed==2) { /* Unknown */
                        printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
                        card->ringspeed = 1; /* default to 16mb */
                }
                
                printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);

                printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name, 
                       (card->ringspeed)?16:4, 
                       card->cabletype?"STP/DB9":"UTP/RJ-45");
                printk("%s:     Arbitration Level: %d\n", dev->name, 
                       card->arblevel);

                printk("%s:     Burst Mode: ", dev->name);
                switch(card->burstmode) {
                case 0: printk("Cycle steal"); break;
                case 1: printk("Limited burst"); break;
                case 2: printk("Delayed release"); break;
                case 3: printk("Immediate release"); break;
                }
                printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");


                /* 
                 * Enable SIF before we assign the interrupt handler,
                 * just in case we get spurious interrupts that need
                 * handling.
                 */ 
                outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
                madgemc_setsifsel(dev, 1);
                if (request_irq(dev->irq, madgemc_interrupt, SA_SHIRQ,
                               "madgemc", dev)) 
                        goto getout;
                
                madgemc_chipset_init(dev); /* enables interrupts! */
                madgemc_setcabletype(dev, card->cabletype);

                /* Setup MCA structures */
                mca_set_adapter_name(slot, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
                mca_set_adapter_procfn(slot, madgemc_mcaproc, dev);
                mca_mark_as_used(slot);

                printk("%s:     Ring Station Address: ", dev->name);
                printk("%2.2x", dev->dev_addr[0]);
                for (i = 1; i < 6; i++)
                        printk(":%2.2x", dev->dev_addr[i]);
                printk("\n");

                /* XXX is ISA_MAX_ADDRESS correct here? */
                if (tmsdev_init(dev, ISA_MAX_ADDRESS, NULL)) {
                        printk("%s: unable to get memory for dev->priv.\n", 
                               dev->name);
                        release_region(dev->base_addr-MADGEMC_SIF_OFFSET, 
                               MADGEMC_IO_EXTENT); 
                        
                        kfree(card);
                        tmsdev_term(dev);
                        free_netdev(dev);
                        if (madgemc_card_list)
                                return 0;
                        return -1;
                }
                tp = netdev_priv(dev);

                /* 
                 * The MC16 is physically a 32bit card.  However, Madge
                 * insists on calling it 16bit, so I'll assume here that
                 * they know what they're talking about.  Cut off DMA
                 * at 16mb.
                 */
                tp->setnselout = madgemc_setnselout_pins;
                tp->sifwriteb = madgemc_sifwriteb;
                tp->sifreadb = madgemc_sifreadb;
                tp->sifwritew = madgemc_sifwritew;
                tp->sifreadw = madgemc_sifreadw;
                tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;

                memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);

                dev->open = madgemc_open;
                dev->stop = madgemc_close;

                if (register_netdev(dev) == 0) {
                        /* Enlist in the card list */
                        card->next = madgemc_card_list;
                        madgemc_card_list = card;
                        slot++;
                        continue; /* successful, try to find another */
                }
                
                free_irq(dev->irq, dev);
        getout:
                release_region(dev->base_addr-MADGEMC_SIF_OFFSET, 
                               MADGEMC_IO_EXTENT); 
        getout1:
                kfree(card);
                free_netdev(dev);
                slot++;
        }

        if (madgemc_card_list)
                return 0;
        return -1;
}

/*
 * Handle interrupts generated by the card
 *
 * The MicroChannel Madge cards need slightly more handling
 * after an interrupt than other TMS380 cards do.
 *
 * First we must make sure it was this card that generated the
 * interrupt (since interrupt sharing is allowed).  Then,
 * because we're using level-triggered interrupts (as is
 * standard on MCA), we must toggle the interrupt line
 * on the card in order to claim and acknowledge the interrupt.
 * Once that is done, the interrupt should be handlable in
 * the normal tms380tr_interrupt() routine.
 *
 * There's two ways we can check to see if the interrupt is ours,
 * both with their own disadvantages...
 *
 * 1)   Read in the SIFSTS register from the TMS controller.  This
 *      is guarenteed to be accurate, however, there's a fairly
 *      large performance penalty for doing so: the Madge chips
 *      must request the register from the Eagle, the Eagle must
 *      read them from its internal bus, and then take the route
 *      back out again, for a 16bit read.  
 *
 * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 *      The major disadvantage here is that the accuracy of the
 *      bit is in question.  However, it cuts out the extra read
 *      cycles it takes to read the Eagle's SIF, as its only an
 *      8bit read, and theoretically the Madge bit is directly
 *      connected to the interrupt latch coming out of the Eagle
 *      hardware (that statement is not verified).  
 *
 * I can't determine which of these methods has the best win.  For now,
 * we make a compromise.  Use the Madge way for the first interrupt,
 * which should be the fast-path, and then once we hit the first 
 * interrupt, keep on trying using the SIF method until we've
 * exhausted all contiguous interrupts.
 *
 */
static irqreturn_t madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        int pending,reg1;
        struct net_device *dev;

        if (!dev_id) {
                printk("madgemc_interrupt: was not passed a dev_id!\n");
                return IRQ_NONE;
        }

        dev = (struct net_device *)dev_id;

        /* Make sure its really us. -- the Madge way */
        pending = inb(dev->base_addr + MC_CONTROL_REG0);
        if (!(pending & MC_CONTROL_REG0_SINTR))
                return IRQ_NONE; /* not our interrupt */

        /*
         * Since we're level-triggered, we may miss the rising edge
         * of the next interrupt while we're off handling this one,
         * so keep checking until the SIF verifies that it has nothing
         * left for us to do.
         */
        pending = STS_SYSTEM_IRQ;
        do {
                if (pending & STS_SYSTEM_IRQ) {

                        /* Toggle the interrupt to reset the latch on card */
                        reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
                        outb(reg1 ^ MC_CONTROL_REG1_SINTEN, 
                             dev->base_addr + MC_CONTROL_REG1);
                        outb(reg1, dev->base_addr + MC_CONTROL_REG1);

                        /* Continue handling as normal */
                        tms380tr_interrupt(irq, dev_id, regs);

                        pending = SIFREADW(SIFSTS); /* restart - the SIF way */

                } else
                        return IRQ_HANDLED; 
        } while (1);

        return IRQ_HANDLED; /* not reachable */
}

/*
 * Set the card to the prefered ring speed.
 *
 * Unlike newer cards, the MC16/32 have their speed selection
 * circuit connected to the Madge ASICs and not to the TMS380
 * NSELOUT pins. Set the ASIC bits correctly here, and return 
 * zero to leave the TMS NSELOUT bits unaffected.
 *
 */
unsigned short madgemc_setnselout_pins(struct net_device *dev)
{
        unsigned char reg1;
        struct net_local *tp = netdev_priv(dev);
        
        reg1 = inb(dev->base_addr + MC_CONTROL_REG1);

        if(tp->DataRate == SPEED_16)
                reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
        else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
                reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
        outb(reg1, dev->base_addr + MC_CONTROL_REG1);

        return 0; /* no change */
}

/*
 * Set the register page.  This equates to the SRSX line
 * on the TMS380Cx6.
 *
 * Register selection is normally done via three contiguous
 * bits.  However, some boards (such as the MC16/32) use only
 * two bits, plus a separate bit in the glue chip.  This
 * sets the SRSX bit (the top bit).  See page 4-17 in the
 * Yellow Book for which registers are affected.
 *
 */
static void madgemc_setregpage(struct net_device *dev, int page)
{       
        static int reg1;

        reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
        if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
                outb(reg1 ^ MC_CONTROL_REG1_SRSX, 
                     dev->base_addr + MC_CONTROL_REG1);
        }
        else if (page == 1) {
                outb(reg1 | MC_CONTROL_REG1_SRSX, 
                     dev->base_addr + MC_CONTROL_REG1);
        }
        reg1 = inb(dev->base_addr + MC_CONTROL_REG1);

        return;
}

/*
 * The SIF registers are not mapped into register space by default
 * Set this to 1 to map them, 0 to map the BIA ROM.
 *
 */
static void madgemc_setsifsel(struct net_device *dev, int val)
{
        unsigned int reg0;

        reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
        if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
                outb(reg0 ^ MC_CONTROL_REG0_SIFSEL, 
                     dev->base_addr + MC_CONTROL_REG0);
        } else if (val == 1) {
                outb(reg0 | MC_CONTROL_REG0_SIFSEL, 
                     dev->base_addr + MC_CONTROL_REG0);
        }       
        reg0 = inb(dev->base_addr + MC_CONTROL_REG0);

        return;
}

/*
 * Enable SIF interrupts
 *
 * This does not enable interrupts in the SIF, but rather
 * enables SIF interrupts to be passed onto the host.
 *
 */
static void madgemc_setint(struct net_device *dev, int val)
{
        unsigned int reg1;

        reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
        if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
                outb(reg1 ^ MC_CONTROL_REG1_SINTEN, 
                     dev->base_addr + MC_CONTROL_REG1);
        } else if (val == 1) {
                outb(reg1 | MC_CONTROL_REG1_SINTEN, 
                     dev->base_addr + MC_CONTROL_REG1);
        }

        return;
}

/*
 * Cable type is set via control register 7. Bit zero high
 * for UTP, low for STP.
 */
static void madgemc_setcabletype(struct net_device *dev, int type)
{
        outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
             dev->base_addr + MC_CONTROL_REG7);
}

/*
 * Enable the functions of the Madge chipset needed for
 * full working order. 
 */
static int madgemc_chipset_init(struct net_device *dev)
{
        outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
        tms380tr_wait(100); /* wait for card to reset */

        /* bring back into normal operating mode */
        outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);

        /* map SIF registers */
        madgemc_setsifsel(dev, 1);

        /* enable SIF interrupts */
        madgemc_setint(dev, 1); 

        return 0;
}

/*
 * Disable the board, and put back into power-up state.
 */
void madgemc_chipset_close(struct net_device *dev)
{
        /* disable interrupts */
        madgemc_setint(dev, 0);
        /* unmap SIF registers */
        madgemc_setsifsel(dev, 0);

        return;
}

/*
 * Read the card type (MC16 or MC32) from the card.
 *
 * The configuration registers are stored in two separate
 * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 * for page zero, or setting bit 3 for page one.
 *
 * Page zero contains the following data:
 *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 *      Byte 1: Card type:
 *                      0x08 for MC16
 *                      0x0D for MC32
 *      Byte 2: Card revision
 *      Byte 3: Mirror of POS config register 0
 *      Byte 4: Mirror of POS 1
 *      Byte 5: Mirror of POS 2
 *
 * Page one contains the following data:
 *      Byte 0: Unused
 *      Byte 1-6: BIA, MSB to LSB.
 *
 * Note that to read the BIA, we must unmap the SIF registers
 * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 * will reside in the same logical location.  For this reason,
 * _never_ read the BIA while the Eagle processor is running!
 * The SIF will be completely inaccessible until the BIA operation
 * is complete.
 *
 */
static void madgemc_read_rom(struct madgemc_card *card)
{
        unsigned long ioaddr;
        unsigned char reg0, reg1, tmpreg0, i;

        ioaddr = card->dev->base_addr;

        reg0 = inb(ioaddr + MC_CONTROL_REG0);
        reg1 = inb(ioaddr + MC_CONTROL_REG1);

        /* Switch to page zero and unmap SIF */
        tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
        outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
        
        card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
        card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
        card->cardrev = inb(ioaddr + MC_ROM_REVISION);

        /* Switch to rom page one */
        outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);

        /* Read BIA */
        card->dev->addr_len = 6;
        for (i = 0; i < 6; i++)
                card->dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
        
        /* Restore original register values */
        outb(reg0, ioaddr + MC_CONTROL_REG0);
        outb(reg1, ioaddr + MC_CONTROL_REG1);
        
        return;
}

static int madgemc_open(struct net_device *dev)
{  
        /*
         * Go ahead and reinitialize the chipset again, just to 
         * make sure we didn't get left in a bad state.
         */
        madgemc_chipset_init(dev);
        tms380tr_open(dev);
        return 0;
}

static int madgemc_close(struct net_device *dev)
{
        tms380tr_close(dev);
        madgemc_chipset_close(dev);
        return 0;
}

/*
 * Give some details available from /proc/mca/slotX
 */
static int madgemc_mcaproc(char *buf, int slot, void *d) 
{       
        struct net_device *dev = (struct net_device *)d;
        struct madgemc_card *curcard = madgemc_card_list;
        int len = 0;
        
        while (curcard) { /* search for card struct */
                if (curcard->dev == dev)
                        break;
                curcard = curcard->next;
        }
        len += sprintf(buf+len, "-------\n");
        if (curcard) {
                struct net_local *tp = netdev_priv(dev);
                int i;
                
                len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
                len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
                len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
                len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
                len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
                len += sprintf(buf+len, "Device: %s\n", dev->name);
                len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
                len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
                len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
                len += sprintf(buf+len, "Burst Mode: ");
                switch(curcard->burstmode) {
                case 0: len += sprintf(buf+len, "Cycle steal"); break;
                case 1: len += sprintf(buf+len, "Limited burst"); break;
                case 2: len += sprintf(buf+len, "Delayed release"); break;
                case 3: len += sprintf(buf+len, "Immediate release"); break;
                }
                len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
                
                len += sprintf(buf+len, "Ring Station Address: ");
                len += sprintf(buf+len, "%2.2x", dev->dev_addr[0]);
                for (i = 1; i < 6; i++)
                        len += sprintf(buf+len, " %2.2x", dev->dev_addr[i]);
                len += sprintf(buf+len, "\n");
        } else 
                len += sprintf(buf+len, "Card not configured\n");

        return len;
}

static void __exit madgemc_exit(void)
{
        struct net_device *dev;
        struct madgemc_card *this_card;
        
        while (madgemc_card_list) {
                dev = madgemc_card_list->dev;
                unregister_netdev(dev);
                release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
                free_irq(dev->irq, dev);
                tmsdev_term(dev);
                free_netdev(dev);
                this_card = madgemc_card_list;
                madgemc_card_list = this_card->next;
                kfree(this_card);
        }
}

module_init(madgemc_probe);
module_exit(madgemc_exit);

MODULE_LICENSE("GPL");

\f
/*
 * Local variables:
 *  compile-command: "gcc -DMODVERSIONS  -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 *  alt-compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 *  c-set-style "K&R"
 *  c-indent-level: 8
 *  c-basic-offset: 8
 *  tab-width: 8
 * End:
 */