1 files changed, 800 insertions, 0 deletions

diff --git a/drivers/net/tokenring/madgemc.c b/drivers/net/tokenring/madgemc.c
new file mode 100644
index 000000000000..cfae2bbf2167
--- /dev/null
+++ b/drivers/net/tokenring/madgemc.c
@@ -0,0 +1,800 @@
+/*
+ *  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");
+
+
+/*
+ * 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:
+ */
+