Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
kernel-fxtec-pro1x/drivers/sn/ioc3.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

844 lines
20 KiB
C
Raw Blame History

/*
* 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>
#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 = (struct ioc3_driver_data *)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",
__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, DMA_64BIT_MASK);
if (!ret) {
ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
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_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 ",
__FUNCTION__, 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 ",
__FUNCTION__, 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 ",
__FUNCTION__, 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_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",
__FUNCTION__,
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_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_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);
Reference in a new issue View git blame Copy permalink