3 files changed, 866 insertions, 0 deletions

diff --git a/drivers/sn/Kconfig b/drivers/sn/Kconfig
index 13b8d249da5c..d95265b187a3 100644
--- a/drivers/sn/Kconfig
+++ b/drivers/sn/Kconfig
@@ -17,4 +17,18 @@ config SGI_IOC4
         If you have an SGI Altix with an IOC4-based
         I/O controller say Y.  Otherwise say N.
 
+config SGI_IOC3
+        tristate "SGI IOC3 Base IO support"
+        depends on (IA64_GENERIC || IA64_SGI_SN2)
+        default m
+        ---help---
+        This option enables basic support for the SGI IOC3-based Base IO
+        controller card.  This option does not enable any specific
+        functions on such a card, but provides necessary infrastructure
+        for other drivers to utilize.
+
+        If you have an SGI Altix with an IOC3-based
+        I/O controller or a PCI IOC3 serial card say Y.
+        Otherwise say N.
+
 endmenu
diff --git a/drivers/sn/Makefile b/drivers/sn/Makefile
index c2a284185372..2cda011597c0 100644
--- a/drivers/sn/Makefile
+++ b/drivers/sn/Makefile
@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_SGI_IOC4) += ioc4.o
+obj-$(CONFIG_SGI_IOC3) += ioc3.o
diff --git a/drivers/sn/ioc3.c b/drivers/sn/ioc3.c
new file mode 100644
index 000000000000..aaa009f4a7bf
--- /dev/null
+++ b/drivers/sn/ioc3.c
@@ -0,0 +1,851 @@
+/*
+ * SGI IOC3 master driver and IRQ demuxer
+ *
+ * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
+ * Heavily based on similar work by:
+ *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
+ *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/ioc3.h>
+#include <linux/rwsem.h>
+
+#define IOC3_PCI_SIZE 0x100000
+
+static LIST_HEAD(ioc3_devices);
+static int ioc3_counter;
+static DECLARE_RWSEM(ioc3_devices_rwsem);
+
+static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
+static struct ioc3_submodule *ioc3_ethernet;
+static rwlock_t ioc3_submodules_lock = RW_LOCK_UNLOCKED;
+
+/* NIC probing code */
+
+#define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */
+
+static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
+{
+        return (pulse << 10) | (sample << 2);
+}
+
+static int nic_wait(struct ioc3_driver_data *idd)
+{
+        volatile unsigned mcr;
+
+        do {
+                mcr = (volatile unsigned)idd->vma->mcr;
+        } while (!(mcr & 2));
+
+        return mcr & 1;
+}
+
+static int nic_reset(struct ioc3_driver_data *idd)
+{
+        int presence;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        idd->vma->mcr = mcr_pack(500, 65);
+        presence = nic_wait(idd);
+        local_irq_restore(flags);
+
+        udelay(500);
+
+        return presence;
+}
+
+static inline int nic_read_bit(struct ioc3_driver_data *idd)
+{
+        int result;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        idd->vma->mcr = mcr_pack(6, 13);
+        result = nic_wait(idd);
+        local_irq_restore(flags);
+
+        udelay(500);
+
+        return result;
+}
+
+static inline void nic_write_bit(struct ioc3_driver_data *idd, int bit)
+{
+        if (bit)
+                idd->vma->mcr = mcr_pack(6, 110);
+        else
+                idd->vma->mcr = mcr_pack(80, 30);
+
+        nic_wait(idd);
+}
+
+static unsigned nic_read_byte(struct ioc3_driver_data *idd)
+{
+        unsigned result = 0;
+        int i;
+
+        for (i = 0; i < 8; i++)
+                result = (result >> 1) | (nic_read_bit(idd) << 7);
+
+        return result;
+}
+
+static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
+{
+        int i, bit;
+
+        for (i = 8; i; i--) {
+                bit = byte & 1;
+                byte >>= 1;
+
+                nic_write_bit(idd, bit);
+        }
+}
+
+static unsigned long
+nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
+{
+        int a, b, index, disc;
+
+        nic_reset(idd);
+
+        /* Search ROM.  */
+        nic_write_byte(idd, 0xF0);
+
+        /* Algorithm from ``Book of iButton Standards''.  */
+        for (index = 0, disc = 0; index < 64; index++) {
+                a = nic_read_bit(idd);
+                b = nic_read_bit(idd);
+
+                if (a && b) {
+                        printk(KERN_WARNING "IOC3 NIC search failed.\n");
+                        *last = 0;
+                        return 0;
+                }
+
+                if (!a && !b) {
+                        if (index == *last) {
+                                addr |= 1UL << index;
+                        } else if (index > *last) {
+                                addr &= ~(1UL << index);
+                                disc = index;
+                        } else if ((addr & (1UL << index)) == 0)
+                                disc = index;
+                        nic_write_bit(idd, (addr>>index)&1);
+                        continue;
+                } else {
+                        if (a)
+                                addr |= 1UL << index;
+                        else
+                                addr &= ~(1UL << index);
+                        nic_write_bit(idd, a);
+                        continue;
+                }
+        }
+        *last = disc;
+        return addr;
+}
+
+static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
+{
+        int index;
+
+        nic_reset(idd);
+        nic_write_byte(idd, 0xF0);
+        for (index = 0; index < 64; index++) {
+                nic_read_bit(idd);
+                nic_read_bit(idd);
+                nic_write_bit(idd, (addr>>index)&1);
+        }
+}
+
+static void crc16_byte(unsigned int *crc, unsigned char db)
+{
+        int i;
+
+        for(i=0;i<8;i++) {
+                *crc <<= 1;
+                if((db^(*crc>>16)) & 1)
+                        *crc ^= 0x8005;
+                db >>= 1;
+        }
+        *crc &= 0xFFFF;
+}
+
+static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
+{
+        while(size--)
+                crc16_byte(&crc, *(dbs++));
+        return crc;
+}
+
+static void crc8_byte(unsigned int *crc, unsigned char db)
+{
+        int i,f;
+
+        for(i=0;i<8;i++) {
+                f = (*crc ^ db) & 1;
+                *crc >>= 1;
+                db >>= 1;
+                if(f)
+                        *crc ^= 0x8c;
+        }
+        *crc &= 0xff;
+}
+
+static unsigned int crc8_addr(unsigned long addr)
+{
+        int i;
+        unsigned int crc = 0x00;
+
+        for(i=0;i<8;i++)
+                crc8_byte(&crc, addr>>(i<<3));
+        return crc;
+}
+
+static void
+read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
+                        unsigned char *redir, unsigned char *data)
+{
+        int loops = 16, i;
+
+        while(redir[page] != 0xFF) {
+                page = redir[page]^0xFF;
+                loops--;
+                if(loops<0) {
+                        printk(KERN_ERR "IOC3: NIC circular redirection\n");
+                        return;
+                }
+        }
+        loops = 3;
+        while(loops>0) {
+                nic_addr(idd, addr);
+                nic_write_byte(idd, 0xF0);
+                nic_write_byte(idd, (page << 5) & 0xE0);
+                nic_write_byte(idd, (page >> 3) & 0x1F);
+                for(i=0;i<0x20;i++)
+                        data[i] = nic_read_byte(idd);
+                if(crc16_area(data, 0x20, 0x0000) == 0x800d)
+                        return;
+                loops--;
+        }
+        printk(KERN_ERR "IOC3: CRC error in data page\n");
+        for(i=0;i<0x20;i++)
+                data[i] = 0x00;
+}
+
+static void
+read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
+                                         unsigned char *redir)
+{
+        int i,j,loops = 3,crc_ok;
+        unsigned int crc;
+
+        while(loops>0) {
+                crc_ok = 1;
+                nic_addr(idd, addr);
+                nic_write_byte(idd, 0xAA);
+                nic_write_byte(idd, 0x00);
+                nic_write_byte(idd, 0x01);
+                for(i=0;i<64;i+=8) {
+                        for(j=0;j<8;j++)
+                                redir[i+j] = nic_read_byte(idd);
+                        crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
+                        crc16_byte(&crc, nic_read_byte(idd));
+                        crc16_byte(&crc, nic_read_byte(idd));
+                        if(crc != 0x800d)
+                                crc_ok = 0;
+                }
+                if(crc_ok)
+                        return;
+                loops--;
+        }
+        printk(KERN_ERR "IOC3: CRC error in redirection page\n");
+        for(i=0;i<64;i++)
+                redir[i] = 0xFF;
+}
+
+static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
+{
+        unsigned char redir[64];
+        unsigned char data[64],part[32];
+        int i,j;
+
+        /* read redirections */
+        read_redir_map(idd, addr, redir);
+        /* read data pages */
+        read_redir_page(idd, addr, 0, redir, data);
+        read_redir_page(idd, addr, 1, redir, data+32);
+        /* assemble the part # */
+        j=0;
+        for(i=0;i<19;i++)
+                if(data[i+11] != ' ')
+                        part[j++] = data[i+11];
+        for(i=0;i<6;i++)
+                if(data[i+32] != ' ')
+                        part[j++] = data[i+32];
+        part[j] = 0;
+        /* skip Octane power supplies */
+        if(!strncmp(part, "060-0035-", 9))
+                return;
+        if(!strncmp(part, "060-0038-", 9))
+                return;
+        strcpy(idd->nic_part, part);
+        /* assemble the serial # */
+        j=0;
+        for(i=0;i<10;i++)
+                if(data[i+1] != ' ')
+                        idd->nic_serial[j++] = data[i+1];
+        idd->nic_serial[j] = 0;
+}
+
+static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
+{
+        int i, loops = 3;
+        unsigned char data[13];
+
+        while(loops>0) {
+                nic_addr(idd, addr);
+                nic_write_byte(idd, 0xF0);
+                nic_write_byte(idd, 0x00);
+                nic_write_byte(idd, 0x00);
+                nic_read_byte(idd);
+                for(i=0;i<13;i++)
+                        data[i] = nic_read_byte(idd);
+                if(crc16_area(data, 13, 0x0000) == 0x800d) {
+                        for(i=10;i>4;i--)
+                                idd->nic_mac[10-i] = data[i];
+                        return;
+                }
+                loops--;
+        }
+        printk(KERN_ERR "IOC3: CRC error in MAC address\n");
+        for(i=0;i<6;i++)
+                idd->nic_mac[i] = 0x00;
+}
+
+static void probe_nic(struct ioc3_driver_data *idd)
+{
+        int save = 0, loops = 3;
+        unsigned long first, addr;
+
+        idd->vma->gpcr_s = GPCR_MLAN_EN;
+
+        while(loops>0) {
+                idd->nic_part[0] = 0;
+                idd->nic_serial[0] = 0;
+                addr = first = nic_find(idd, &save, 0);
+                if(!first)
+                        return;
+                while(1) {
+                        if(crc8_addr(addr))
+                                break;
+                        else {
+                                switch(addr & 0xFF) {
+                                case 0x0B:
+                                        read_nic(idd, addr);
+                                        break;
+                                case 0x09:
+                                case 0x89:
+                                case 0x91:
+                                        read_mac(idd, addr);
+                                        break;
+                                }
+                        }
+                        addr = nic_find(idd, &save, addr);
+                        if(addr == first)
+                                return;
+                }
+                loops--;
+        }
+        printk(KERN_ERR "IOC3: CRC error in NIC address\n");
+}
+
+/* Interrupts */
+
+static inline void
+write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&idd->ir_lock, flags);
+        switch (which) {
+        case IOC3_W_IES:
+                writel(val, &idd->vma->sio_ies);
+                break;
+        case IOC3_W_IEC:
+                writel(val, &idd->vma->sio_iec);
+                break;
+        }
+        spin_unlock_irqrestore(&idd->ir_lock, flags);
+}
+static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
+{
+        unsigned long flag;
+        uint32_t intrs = 0;
+
+        spin_lock_irqsave(&idd->ir_lock, flag);
+        intrs = readl(&idd->vma->sio_ir);
+        intrs &= readl(&idd->vma->sio_ies);
+        spin_unlock_irqrestore(&idd->ir_lock, flag);
+        return intrs;
+}
+
+static irqreturn_t ioc3_intr_io(int irq, void *arg, struct pt_regs *regs)
+{
+        unsigned long flags;
+        struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
+        int handled = 1, id;
+        unsigned int pending;
+
+        read_lock_irqsave(&ioc3_submodules_lock, flags);
+
+        if(idd->dual_irq && idd->vma->eisr) {
+                /* send Ethernet IRQ to the driver */
+                if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
+                                                ioc3_ethernet->intr) {
+                        handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
+                                                        idd, 0, regs);
+                }
+        }
+        pending = get_pending_intrs(idd);       /* look at the IO IRQs */
+
+        for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
+                if(idd->active[id] && ioc3_submodules[id]
+                                && (pending & ioc3_submodules[id]->irq_mask)
+                                && ioc3_submodules[id]->intr) {
+                        write_ireg(idd, ioc3_submodules[id]->irq_mask,
+                                                        IOC3_W_IEC);
+                        if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
+                                   idd, pending & ioc3_submodules[id]->irq_mask,
+                                        regs))
+                                pending &= ~ioc3_submodules[id]->irq_mask;
+                        if (ioc3_submodules[id]->reset_mask)
+                                write_ireg(idd, ioc3_submodules[id]->irq_mask,
+                                                        IOC3_W_IES);
+                }
+        }
+        read_unlock_irqrestore(&ioc3_submodules_lock, flags);
+        if(pending) {
+                printk(KERN_WARNING
+                  "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
+                write_ireg(idd, pending, IOC3_W_IEC);
+                handled = 1;
+        }
+        return handled?IRQ_HANDLED:IRQ_NONE;
+}
+
+static irqreturn_t ioc3_intr_eth(int irq, void *arg, struct pt_regs *regs)
+{
+        unsigned long flags;
+        struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
+        int handled = 1;
+
+        if(!idd->dual_irq)
+                return IRQ_NONE;
+        read_lock_irqsave(&ioc3_submodules_lock, flags);
+        if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
+                                && ioc3_ethernet->intr)
+                handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0,
+                                                                regs);
+        read_unlock_irqrestore(&ioc3_submodules_lock, flags);
+        return handled?IRQ_HANDLED:IRQ_NONE;
+}
+
+void ioc3_enable(struct ioc3_submodule *is,
+                                struct ioc3_driver_data *idd, unsigned int irqs)
+{
+        write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
+}
+
+void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
+                                unsigned int irqs)
+{
+        writel(irqs & is->irq_mask, &idd->vma->sio_ir);
+}
+
+void ioc3_disable(struct ioc3_submodule *is,
+                                struct ioc3_driver_data *idd, unsigned int irqs)
+{
+        write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
+}
+
+void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
+{
+        unsigned long flags;
+        spin_lock_irqsave(&idd->gpio_lock, flags);
+        writel(val, &idd->vma->gpcr_s);
+        spin_unlock_irqrestore(&idd->gpio_lock, flags);
+}
+
+/* Keep it simple, stupid! */
+static int find_slot(void **tab, int max)
+{
+        int i;
+        for(i=0;i<max;i++)
+                if(!(tab[i]))
+                        return i;
+        return -1;
+}
+
+/* Register an IOC3 submodule */
+int ioc3_register_submodule(struct ioc3_submodule *is)
+{
+        struct ioc3_driver_data *idd;
+        int alloc_id;
+        unsigned long flags;
+
+        write_lock_irqsave(&ioc3_submodules_lock, flags);
+        alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
+        if(alloc_id != -1) {
+                ioc3_submodules[alloc_id] = is;
+                if(is->ethernet) {
+                        if(ioc3_ethernet==NULL)
+                                ioc3_ethernet=is;
+                        else
+                                printk(KERN_WARNING
+                                  "IOC3 Ethernet module already registered!\n");
+                }
+        }
+        write_unlock_irqrestore(&ioc3_submodules_lock, flags);
+
+        if(alloc_id == -1) {
+                printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
+                return -ENOMEM;
+        }
+
+        is->id=alloc_id;
+
+        /* Initialize submodule for each IOC3 */
+        if (!is->probe)
+                return 0;
+
+        down_read(&ioc3_devices_rwsem);
+        list_for_each_entry(idd, &ioc3_devices, list) {
+                /* set to 1 for IRQs in probe */
+                idd->active[alloc_id] = 1;
+                idd->active[alloc_id] = !is->probe(is, idd);
+        }
+        up_read(&ioc3_devices_rwsem);
+
+        return 0;
+}
+
+/* Unregister an IOC3 submodule */
+void ioc3_unregister_submodule(struct ioc3_submodule *is)
+{
+        struct ioc3_driver_data *idd;
+        unsigned long flags;
+
+        write_lock_irqsave(&ioc3_submodules_lock, flags);
+        if(ioc3_submodules[is->id]==is)
+                ioc3_submodules[is->id]=NULL;
+        else
+                printk(KERN_WARNING
+                        "IOC3 submodule %s has wrong ID.\n",is->name);
+        if(ioc3_ethernet==is)
+                ioc3_ethernet = NULL;
+        write_unlock_irqrestore(&ioc3_submodules_lock, flags);
+
+        /* Remove submodule for each IOC3 */
+        down_read(&ioc3_devices_rwsem);
+        list_for_each_entry(idd, &ioc3_devices, list)
+                if(idd->active[is->id]) {
+                        if(is->remove)
+                                if(is->remove(is, idd))
+                                        printk(KERN_WARNING
+                                               "%s: IOC3 submodule %s remove failed "
+                                               "for pci_dev %s.\n",
+                                               __FUNCTION__, module_name(is->owner),
+                                               pci_name(idd->pdev));
+                        idd->active[is->id] = 0;
+                        if(is->irq_mask)
+                                write_ireg(idd, is->irq_mask, IOC3_W_IEC);
+                }
+        up_read(&ioc3_devices_rwsem);
+}
+
+/*********************
+ * Device management *
+ *********************/
+
+static char *
+ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
+                        "MENET 4", "CADduo", "Altix Serial"};
+
+static int ioc3_class(struct ioc3_driver_data *idd)
+{
+        int res = IOC3_CLASS_NONE;
+        /* NIC-based logic */
+        if(!strncmp(idd->nic_part, "030-0891-", 9))
+                res = IOC3_CLASS_BASE_IP30;
+        if(!strncmp(idd->nic_part, "030-1155-", 9))
+                res = IOC3_CLASS_CADDUO;
+        if(!strncmp(idd->nic_part, "030-1657-", 9))
+                res = IOC3_CLASS_SERIAL;
+        if(!strncmp(idd->nic_part, "030-1664-", 9))
+                res = IOC3_CLASS_SERIAL;
+        /* total random heuristics */
+#ifdef CONFIG_SGI_IP27
+        if(!idd->nic_part[0])
+                res = IOC3_CLASS_BASE_IP27;
+#endif
+        /* print educational message */
+        printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
+                        idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
+        return res;
+}
+/* Adds a new instance of an IOC3 card */
+static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
+{
+        struct ioc3_driver_data *idd;
+        uint32_t pcmd;
+        int ret, id;
+
+        /* Enable IOC3 and take ownership of it */
+        if ((ret = pci_enable_device(pdev))) {
+                printk(KERN_WARNING
+                       "%s: Failed to enable IOC3 device for pci_dev %s.\n",
+                       __FUNCTION__, pci_name(pdev));
+                goto out;
+        }
+        pci_set_master(pdev);
+
+#ifdef USE_64BIT_DMA
+        ret = pci_set_dma_mask(pdev, 0xffffffffffffffffULL);
+        if (!ret) {
+                ret = pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL);
+                if (ret < 0) {
+                        printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
+                               "for consistent allocations\n",
+                                __FUNCTION__);
+                }
+        }
+#endif
+
+        /* Set up per-IOC3 data */
+        idd = kmalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
+        if (!idd) {
+                printk(KERN_WARNING
+                       "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
+                       __FUNCTION__, pci_name(pdev));
+                ret = -ENODEV;
+                goto out_idd;
+        }
+        memset(idd, 0, sizeof(struct ioc3_driver_data));
+        spin_lock_init(&idd->ir_lock);
+        spin_lock_init(&idd->gpio_lock);
+        idd->pdev = pdev;
+
+        /* Map all IOC3 registers.  These are shared between subdevices
+         * so the main IOC3 module manages them.
+         */
+        idd->pma = pci_resource_start(pdev, 0);
+        if (!idd->pma) {
+                printk(KERN_WARNING
+                       "%s: Unable to find IOC3 resource "
+                       "for pci_dev %s.\n",
+                       __FUNCTION__, pci_name(pdev));
+                ret = -ENODEV;
+                goto out_pci;
+        }
+        if (!request_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
+                printk(KERN_WARNING
+                       "%s: Unable to request IOC3 region "
+                       "for pci_dev %s.\n",
+                       __FUNCTION__, pci_name(pdev));
+                ret = -ENODEV;
+                goto out_pci;
+        }
+        idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
+        if (!idd->vma) {
+                printk(KERN_WARNING
+                       "%s: Unable to remap IOC3 region "
+                       "for pci_dev %s.\n",
+                       __FUNCTION__, pci_name(pdev));
+                ret = -ENODEV;
+                goto out_misc_region;
+        }
+
+        /* Track PCI-device specific data */
+        pci_set_drvdata(pdev, idd);
+        down_write(&ioc3_devices_rwsem);
+        list_add(&idd->list, &ioc3_devices);
+        idd->id = ioc3_counter++;
+        up_write(&ioc3_devices_rwsem);
+
+        idd->gpdr_shadow = idd->vma->gpdr;
+
+        /* Read IOC3 NIC contents */
+        probe_nic(idd);
+
+        /* Detect IOC3 class */
+        idd->class = ioc3_class(idd);
+
+        /* Initialize IOC3 */
+       pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
+       pci_write_config_dword(pdev, PCI_COMMAND,
+                               pcmd | PCI_COMMAND_MEMORY |
+                               PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
+                               PCI_SCR_DROP_MODE_EN);
+
+        write_ireg(idd, ~0, IOC3_W_IEC);
+        writel(~0, &idd->vma->sio_ir);
+
+        /* Set up IRQs */
+        if(idd->class == IOC3_CLASS_BASE_IP30
+                                || idd->class == IOC3_CLASS_BASE_IP27) {
+                writel(0, &idd->vma->eier);
+                writel(~0, &idd->vma->eisr);
+
+                idd->dual_irq = 1;
+                if (!request_irq(pdev->irq, ioc3_intr_eth, SA_SHIRQ,
+                                 "ioc3-eth", (void *)idd)) {
+                        idd->irq_eth = pdev->irq;
+                } else {
+                        printk(KERN_WARNING
+                               "%s : request_irq fails for IRQ 0x%x\n ",
+                               __FUNCTION__, pdev->irq);
+                }
+                if (!request_irq(pdev->irq+2, ioc3_intr_io, SA_SHIRQ,
+                                 "ioc3-io", (void *)idd)) {
+                        idd->irq_io = pdev->irq+2;
+                } else {
+                        printk(KERN_WARNING
+                               "%s : request_irq fails for IRQ 0x%x\n ",
+                               __FUNCTION__, pdev->irq+2);
+                }
+        } else {
+                if (!request_irq(pdev->irq, ioc3_intr_io, SA_SHIRQ,
+                                 "ioc3", (void *)idd)) {
+                        idd->irq_io = pdev->irq;
+                } else {
+                        printk(KERN_WARNING
+                               "%s : request_irq fails for IRQ 0x%x\n ",
+                               __FUNCTION__, pdev->irq);
+                }
+        }
+
+        /* Add this IOC3 to all submodules */
+        read_lock(&ioc3_submodules_lock);
+        for(id=0;id<IOC3_MAX_SUBMODULES;id++)
+                if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
+                        idd->active[id] = 1;
+                        idd->active[id] = !ioc3_submodules[id]->probe
+                                                (ioc3_submodules[id], idd);
+                }
+        read_unlock(&ioc3_submodules_lock);
+
+        printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
+
+        return 0;
+
+out_misc_region:
+        release_region(idd->pma, IOC3_PCI_SIZE);
+out_pci:
+        kfree(idd);
+out_idd:
+        pci_disable_device(pdev);
+out:
+        return ret;
+}
+
+/* Removes a particular instance of an IOC3 card. */
+static void ioc3_remove(struct pci_dev *pdev)
+{
+        int id;
+        struct ioc3_driver_data *idd;
+
+        idd = pci_get_drvdata(pdev);
+
+        /* Remove this IOC3 from all submodules */
+        read_lock(&ioc3_submodules_lock);
+        for(id=0;id<IOC3_MAX_SUBMODULES;id++)
+                if(idd->active[id]) {
+                        if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
+                                if(ioc3_submodules[id]->remove(ioc3_submodules[id],
+                                                                idd))
+                                        printk(KERN_WARNING
+                                               "%s: IOC3 submodule 0x%s remove failed "
+                                               "for pci_dev %s.\n",
+                                                __FUNCTION__,
+                                                module_name(ioc3_submodules[id]->owner),
+                                                pci_name(pdev));
+                        idd->active[id] = 0;
+                }
+        read_unlock(&ioc3_submodules_lock);
+
+        /* Clear and disable all IRQs */
+        write_ireg(idd, ~0, IOC3_W_IEC);
+        writel(~0, &idd->vma->sio_ir);
+
+        /* Release resources */
+        free_irq(idd->irq_io, (void *)idd);
+        if(idd->dual_irq)
+                free_irq(idd->irq_eth, (void *)idd);
+        iounmap(idd->vma);
+        release_region(idd->pma, IOC3_PCI_SIZE);
+
+        /* Disable IOC3 and relinquish */
+        pci_disable_device(pdev);
+
+        /* Remove and free driver data */
+        down_write(&ioc3_devices_rwsem);
+        list_del(&idd->list);
+        up_write(&ioc3_devices_rwsem);
+        kfree(idd);
+}
+
+static struct pci_device_id ioc3_id_table[] = {
+        {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
+        {0}
+};
+
+static struct pci_driver ioc3_driver = {
+        .name = "IOC3",
+        .id_table = ioc3_id_table,
+        .probe = ioc3_probe,
+        .remove = ioc3_remove,
+};
+
+MODULE_DEVICE_TABLE(pci, ioc3_id_table);
+
+/*********************
+ * Module management *
+ *********************/
+
+/* Module load */
+static int __devinit ioc3_init(void)
+{
+        if (ia64_platform_is("sn2"))
+                return pci_register_driver(&ioc3_driver);
+        return 0;
+}
+
+/* Module unload */
+static void __devexit ioc3_exit(void)
+{
+        pci_unregister_driver(&ioc3_driver);
+}
+
+module_init(ioc3_init);
+module_exit(ioc3_exit);
+
+MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
+MODULE_DESCRIPTION("PCI driver for SGI IOC3");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(ioc3_register_submodule);
+EXPORT_SYMBOL(ioc3_unregister_submodule);
+EXPORT_SYMBOL(ioc3_ack);
+EXPORT_SYMBOL(ioc3_gpcr_set);
+EXPORT_SYMBOL(ioc3_disable);
+EXPORT_SYMBOL(ioc3_enable);