- 根目录:
- drivers
- sn
- ioc3.c
/*
* 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 * __devinitdata
ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
"MENET 4", "CADduo", "Altix Serial"};
static int __devinit 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 __devinit
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 __devexit 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 = __devexit_p(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);