844 lines
20 KiB
C
Executable file
844 lines
20 KiB
C
Executable file
/*
|
|
* 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);
|