--- /dev/null
+/*
+ * 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/errno.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/ioc3.h>
+#include <linux/rwsem.h>
+#include <linux/slab.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 DEFINE_RWLOCK(ioc3_submodules_lock);
+
+/* 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)
+{
+ unsigned mcr;
+
+ do {
+ mcr = readl(&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);
+ writel(mcr_pack(500, 65), &idd->vma->mcr);
+ presence = nic_wait(idd);
+ local_irq_restore(flags);
+
+ udelay(500);
+
+ return presence;
+}
+
+static int nic_read_bit(struct ioc3_driver_data *idd)
+{
+ int result;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ writel(mcr_pack(6, 13), &idd->vma->mcr);
+ result = nic_wait(idd);
+ local_irq_restore(flags);
+
+ udelay(500);
+
+ return result;
+}
+
+static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
+{
+ if (bit)
+ writel(mcr_pack(6, 110), &idd->vma->mcr);
+ else
+ writel(mcr_pack(80, 30), &idd->vma->mcr);
+
+ 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;
+
+ writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
+
+ 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 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)
+{
+ unsigned long flags;
+ struct ioc3_driver_data *idd = arg;
+ int handled = 1, id;
+ unsigned int pending;
+
+ read_lock_irqsave(&ioc3_submodules_lock, flags);
+
+ if(idd->dual_irq && readb(&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);
+ }
+ }
+ 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))
+ 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)
+{
+ 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);
+ 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",
+ __func__, 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",
+ __func__, pci_name(pdev));
+ goto out;
+ }
+ pci_set_master(pdev);
+
+#ifdef USE_64BIT_DMA
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (!ret) {
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (ret < 0) {
+ printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
+ "for consistent allocations\n",
+ __func__);
+ }
+ }
+#endif
+
+ /* Set up per-IOC3 data */
+ idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
+ if (!idd) {
+ printk(KERN_WARNING
+ "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
+ __func__, pci_name(pdev));
+ ret = -ENODEV;
+ goto out_idd;
+ }
+ 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",
+ __func__, pci_name(pdev));
+ ret = -ENODEV;
+ goto out_pci;
+ }
+ if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
+ printk(KERN_WARNING
+ "%s: Unable to request IOC3 region "
+ "for pci_dev %s.\n",
+ __func__, 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",
+ __func__, 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_tail(&idd->list, &ioc3_devices);
+ idd->id = ioc3_counter++;
+ up_write(&ioc3_devices_rwsem);
+
+ idd->gpdr_shadow = readl(&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, IRQF_SHARED,
+ "ioc3-eth", (void *)idd)) {
+ idd->irq_eth = pdev->irq;
+ } else {
+ printk(KERN_WARNING
+ "%s : request_irq fails for IRQ 0x%x\n ",
+ __func__, pdev->irq);
+ }
+ if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
+ "ioc3-io", (void *)idd)) {
+ idd->irq_io = pdev->irq+2;
+ } else {
+ printk(KERN_WARNING
+ "%s : request_irq fails for IRQ 0x%x\n ",
+ __func__, pdev->irq+2);
+ }
+ } else {
+ if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
+ "ioc3", (void *)idd)) {
+ idd->irq_io = pdev->irq;
+ } else {
+ printk(KERN_WARNING
+ "%s : request_irq fails for IRQ 0x%x\n ",
+ __func__, pdev->irq);
+ }
+ }
+
+ /* Add this IOC3 to all submodules */
+ 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);
+ }
+
+ printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
+
+ return 0;
+
+out_misc_region:
+ release_mem_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 */
+ 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",
+ __func__,
+ module_name(ioc3_submodules[id]->owner),
+ pci_name(pdev));
+ idd->active[id] = 0;
+ }
+
+ /* 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_mem_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 __init ioc3_init(void)
+{
+ if (ia64_platform_is("sn2"))
+ return pci_register_driver(&ioc3_driver);
+ return -ENODEV;
+}
+
+/* Module unload */
+static void __exit 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_GPL(ioc3_register_submodule);
+EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
+EXPORT_SYMBOL_GPL(ioc3_ack);
+EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
+EXPORT_SYMBOL_GPL(ioc3_disable);
+EXPORT_SYMBOL_GPL(ioc3_enable);
Code Review / kvmfornfv.git / blobdiff