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linux/drivers/net/wan/wanxl.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

856 lines
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/*
* wanXL serial card driver for Linux
* host part
*
* Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* Status:
* - Only DTE (external clock) support with NRZ and NRZI encodings
* - wanXL100 will require minor driver modifications, no access to hw
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/hdlc.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <asm/io.h>
#include "wanxl.h"
static const char* version = "wanXL serial card driver version: 0.48";
#define PLX_CTL_RESET 0x40000000 /* adapter reset */
#undef DEBUG_PKT
#undef DEBUG_PCI
/* MAILBOX #1 - PUTS COMMANDS */
#define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
#ifdef __LITTLE_ENDIAN
#define MBX1_CMD_BSWAP 0x8C000001 /* little-endian Byte Swap Mode */
#else
#define MBX1_CMD_BSWAP 0x8C000000 /* big-endian Byte Swap Mode */
#endif
/* MAILBOX #2 - DRAM SIZE */
#define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
typedef struct {
struct net_device *dev;
struct card_t *card;
spinlock_t lock; /* for wanxl_xmit */
int node; /* physical port #0 - 3 */
unsigned int clock_type;
int tx_in, tx_out;
struct sk_buff *tx_skbs[TX_BUFFERS];
}port_t;
typedef struct {
desc_t rx_descs[RX_QUEUE_LENGTH];
port_status_t port_status[4];
}card_status_t;
typedef struct card_t {
int n_ports; /* 1, 2 or 4 ports */
u8 irq;
u8 __iomem *plx; /* PLX PCI9060 virtual base address */
struct pci_dev *pdev; /* for pci_name(pdev) */
int rx_in;
struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
card_status_t *status; /* shared between host and card */
dma_addr_t status_address;
port_t ports[0]; /* 1 - 4 port_t structures follow */
}card_t;
static inline port_t* dev_to_port(struct net_device *dev)
{
return (port_t *)dev_to_hdlc(dev)->priv;
}
static inline port_status_t* get_status(port_t *port)
{
return &port->card->status->port_status[port->node];
}
#ifdef DEBUG_PCI
static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
size_t size, int direction)
{
dma_addr_t addr = pci_map_single(pdev, ptr, size, direction);
if (addr + size > 0x100000000LL)
printk(KERN_CRIT "wanXL %s: pci_map_single() returned memory"
" at 0x%LX!\n", pci_name(pdev),
(unsigned long long)addr);
return addr;
}
#undef pci_map_single
#define pci_map_single pci_map_single_debug
#endif
/* Cable and/or personality module change interrupt service */
static inline void wanxl_cable_intr(port_t *port)
{
u32 value = get_status(port)->cable;
int valid = 1;
const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";
switch(value & 0x7) {
case STATUS_CABLE_V35: cable = "V.35"; break;
case STATUS_CABLE_X21: cable = "X.21"; break;
case STATUS_CABLE_V24: cable = "V.24"; break;
case STATUS_CABLE_EIA530: cable = "EIA530"; break;
case STATUS_CABLE_NONE: cable = "no"; break;
default: cable = "invalid";
}
switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
case STATUS_CABLE_V35: pm = "V.35"; break;
case STATUS_CABLE_X21: pm = "X.21"; break;
case STATUS_CABLE_V24: pm = "V.24"; break;
case STATUS_CABLE_EIA530: pm = "EIA530"; break;
case STATUS_CABLE_NONE: pm = "no personality"; valid = 0; break;
default: pm = "invalid personality"; valid = 0;
}
if (valid) {
if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
", DSR off";
dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
", carrier off";
}
dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
}
printk(KERN_INFO "%s: %s%s module, %s cable%s%s\n",
port->dev->name, pm, dte, cable, dsr, dcd);
if (value & STATUS_CABLE_DCD)
netif_carrier_on(port->dev);
else
netif_carrier_off(port->dev);
}
/* Transmit complete interrupt service */
static inline void wanxl_tx_intr(port_t *port)
{
struct net_device *dev = port->dev;
struct net_device_stats *stats = hdlc_stats(dev);
while (1) {
desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
struct sk_buff *skb = port->tx_skbs[port->tx_in];
switch (desc->stat) {
case PACKET_FULL:
case PACKET_EMPTY:
netif_wake_queue(dev);
return;
case PACKET_UNDERRUN:
stats->tx_errors++;
stats->tx_fifo_errors++;
break;
default:
stats->tx_packets++;
stats->tx_bytes += skb->len;
}
desc->stat = PACKET_EMPTY; /* Free descriptor */
pci_unmap_single(port->card->pdev, desc->address, skb->len,
PCI_DMA_TODEVICE);
dev_kfree_skb_irq(skb);
port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
}
}
/* Receive complete interrupt service */
static inline void wanxl_rx_intr(card_t *card)
{
desc_t *desc;
while (desc = &card->status->rx_descs[card->rx_in],
desc->stat != PACKET_EMPTY) {
if ((desc->stat & PACKET_PORT_MASK) > card->n_ports)
printk(KERN_CRIT "wanXL %s: received packet for"
" nonexistent port\n", pci_name(card->pdev));
else {
struct sk_buff *skb = card->rx_skbs[card->rx_in];
port_t *port = &card->ports[desc->stat &
PACKET_PORT_MASK];
struct net_device *dev = port->dev;
struct net_device_stats *stats = hdlc_stats(dev);
if (!skb)
stats->rx_dropped++;
else {
pci_unmap_single(card->pdev, desc->address,
BUFFER_LENGTH,
PCI_DMA_FROMDEVICE);
skb_put(skb, desc->length);
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s RX(%i):", dev->name,
skb->len);
debug_frame(skb);
#endif
stats->rx_packets++;
stats->rx_bytes += skb->len;
dev->last_rx = jiffies;
skb->protocol = hdlc_type_trans(skb, dev);
netif_rx(skb);
skb = NULL;
}
if (!skb) {
skb = dev_alloc_skb(BUFFER_LENGTH);
desc->address = skb ?
pci_map_single(card->pdev, skb->data,
BUFFER_LENGTH,
PCI_DMA_FROMDEVICE) : 0;
card->rx_skbs[card->rx_in] = skb;
}
}
desc->stat = PACKET_EMPTY; /* Free descriptor */
card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
}
}
static irqreturn_t wanxl_intr(int irq, void* dev_id)
{
card_t *card = dev_id;
int i;
u32 stat;
int handled = 0;
while((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
handled = 1;
writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);
for (i = 0; i < card->n_ports; i++) {
if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
wanxl_tx_intr(&card->ports[i]);
if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
wanxl_cable_intr(&card->ports[i]);
}
if (stat & (1 << DOORBELL_FROM_CARD_RX))
wanxl_rx_intr(card);
}
return IRQ_RETVAL(handled);
}
static int wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
{
port_t *port = dev_to_port(dev);
desc_t *desc;
spin_lock(&port->lock);
desc = &get_status(port)->tx_descs[port->tx_out];
if (desc->stat != PACKET_EMPTY) {
/* should never happen - previous xmit should stop queue */
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
netif_stop_queue(dev);
spin_unlock_irq(&port->lock);
return 1; /* request packet to be queued */
}
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
debug_frame(skb);
#endif
port->tx_skbs[port->tx_out] = skb;
desc->address = pci_map_single(port->card->pdev, skb->data, skb->len,
PCI_DMA_TODEVICE);
desc->length = skb->len;
desc->stat = PACKET_FULL;
writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
port->card->plx + PLX_DOORBELL_TO_CARD);
dev->trans_start = jiffies;
port->tx_out = (port->tx_out + 1) % TX_BUFFERS;
if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
netif_stop_queue(dev);
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
}
spin_unlock(&port->lock);
return 0;
}
static int wanxl_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
port_t *port = dev_to_port(dev);
if (encoding != ENCODING_NRZ &&
encoding != ENCODING_NRZI)
return -EINVAL;
if (parity != PARITY_NONE &&
parity != PARITY_CRC32_PR1_CCITT &&
parity != PARITY_CRC16_PR1_CCITT &&
parity != PARITY_CRC32_PR0_CCITT &&
parity != PARITY_CRC16_PR0_CCITT)
return -EINVAL;
get_status(port)->encoding = encoding;
get_status(port)->parity = parity;
return 0;
}
static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
const size_t size = sizeof(sync_serial_settings);
sync_serial_settings line;
port_t *port = dev_to_port(dev);
if (cmd != SIOCWANDEV)
return hdlc_ioctl(dev, ifr, cmd);
switch (ifr->ifr_settings.type) {
case IF_GET_IFACE:
ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
if (ifr->ifr_settings.size < size) {
ifr->ifr_settings.size = size; /* data size wanted */
return -ENOBUFS;
}
line.clock_type = get_status(port)->clocking;
line.clock_rate = 0;
line.loopback = 0;
if (copy_to_user(ifr->ifr_settings.ifs_ifsu.sync, &line, size))
return -EFAULT;
return 0;
case IF_IFACE_SYNC_SERIAL:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (dev->flags & IFF_UP)
return -EBUSY;
if (copy_from_user(&line, ifr->ifr_settings.ifs_ifsu.sync,
size))
return -EFAULT;
if (line.clock_type != CLOCK_EXT &&
line.clock_type != CLOCK_TXFROMRX)
return -EINVAL; /* No such clock setting */
if (line.loopback != 0)
return -EINVAL;
get_status(port)->clocking = line.clock_type;
return 0;
default:
return hdlc_ioctl(dev, ifr, cmd);
}
}
static int wanxl_open(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
unsigned long timeout;
int i;
if (get_status(port)->open) {
printk(KERN_ERR "%s: port already open\n", dev->name);
return -EIO;
}
if ((i = hdlc_open(dev)) != 0)
return i;
port->tx_in = port->tx_out = 0;
for (i = 0; i < TX_BUFFERS; i++)
get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
/* signal the card */
writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);
timeout = jiffies + HZ;
do
if (get_status(port)->open) {
netif_start_queue(dev);
return 0;
}
while (time_after(timeout, jiffies));
printk(KERN_ERR "%s: unable to open port\n", dev->name);
/* ask the card to close the port, should it be still alive */
writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
return -EFAULT;
}
static int wanxl_close(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
unsigned long timeout;
int i;
hdlc_close(dev);
/* signal the card */
writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
port->card->plx + PLX_DOORBELL_TO_CARD);
timeout = jiffies + HZ;
do
if (!get_status(port)->open)
break;
while (time_after(timeout, jiffies));
if (get_status(port)->open)
printk(KERN_ERR "%s: unable to close port\n", dev->name);
netif_stop_queue(dev);
for (i = 0; i < TX_BUFFERS; i++) {
desc_t *desc = &get_status(port)->tx_descs[i];
if (desc->stat != PACKET_EMPTY) {
desc->stat = PACKET_EMPTY;
pci_unmap_single(port->card->pdev, desc->address,
port->tx_skbs[i]->len,
PCI_DMA_TODEVICE);
dev_kfree_skb(port->tx_skbs[i]);
}
}
return 0;
}
static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
{
struct net_device_stats *stats = hdlc_stats(dev);
port_t *port = dev_to_port(dev);
stats->rx_over_errors = get_status(port)->rx_overruns;
stats->rx_frame_errors = get_status(port)->rx_frame_errors;
stats->rx_errors = stats->rx_over_errors + stats->rx_frame_errors;
return stats;
}
static int wanxl_puts_command(card_t *card, u32 cmd)
{
unsigned long timeout = jiffies + 5 * HZ;
writel(cmd, card->plx + PLX_MAILBOX_1);
do {
if (readl(card->plx + PLX_MAILBOX_1) == 0)
return 0;
schedule();
}while (time_after(timeout, jiffies));
return -1;
}
static void wanxl_reset(card_t *card)
{
u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
writel(0x80, card->plx + PLX_MAILBOX_0);
writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
readl(card->plx + PLX_CONTROL); /* wait for posted write */
udelay(1);
writel(old_value, card->plx + PLX_CONTROL);
readl(card->plx + PLX_CONTROL); /* wait for posted write */
}
static void wanxl_pci_remove_one(struct pci_dev *pdev)
{
card_t *card = pci_get_drvdata(pdev);
int i;
for (i = 0; i < card->n_ports; i++) {
unregister_hdlc_device(card->ports[i].dev);
free_netdev(card->ports[i].dev);
}
/* unregister and free all host resources */
if (card->irq)
free_irq(card->irq, card);
wanxl_reset(card);
for (i = 0; i < RX_QUEUE_LENGTH; i++)
if (card->rx_skbs[i]) {
pci_unmap_single(card->pdev,
card->status->rx_descs[i].address,
BUFFER_LENGTH, PCI_DMA_FROMDEVICE);
dev_kfree_skb(card->rx_skbs[i]);
}
if (card->plx)
iounmap(card->plx);
if (card->status)
pci_free_consistent(pdev, sizeof(card_status_t),
card->status, card->status_address);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
kfree(card);
}
#include "wanxlfw.inc"
static int __devinit wanxl_pci_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
card_t *card;
u32 ramsize, stat;
unsigned long timeout;
u32 plx_phy; /* PLX PCI base address */
u32 mem_phy; /* memory PCI base addr */
u8 __iomem *mem; /* memory virtual base addr */
int i, ports, alloc_size;
#ifndef MODULE
static int printed_version;
if (!printed_version) {
printed_version++;
printk(KERN_INFO "%s\n", version);
}
#endif
i = pci_enable_device(pdev);
if (i)
return i;
/* QUICC can only access first 256 MB of host RAM directly,
but PLX9060 DMA does 32-bits for actual packet data transfers */
/* FIXME when PCI/DMA subsystems are fixed.
We set both dma_mask and consistent_dma_mask to 28 bits
and pray pci_alloc_consistent() will use this info. It should
work on most platforms */
if (pci_set_consistent_dma_mask(pdev, DMA_28BIT_MASK) ||
pci_set_dma_mask(pdev, DMA_28BIT_MASK)) {
printk(KERN_ERR "wanXL: No usable DMA configuration\n");
return -EIO;
}
i = pci_request_regions(pdev, "wanXL");
if (i) {
pci_disable_device(pdev);
return i;
}
switch (pdev->device) {
case PCI_DEVICE_ID_SBE_WANXL100: ports = 1; break;
case PCI_DEVICE_ID_SBE_WANXL200: ports = 2; break;
default: ports = 4;
}
alloc_size = sizeof(card_t) + ports * sizeof(port_t);
card = kmalloc(alloc_size, GFP_KERNEL);
if (card == NULL) {
printk(KERN_ERR "wanXL %s: unable to allocate memory\n",
pci_name(pdev));
pci_release_regions(pdev);
pci_disable_device(pdev);
return -ENOBUFS;
}
memset(card, 0, alloc_size);
pci_set_drvdata(pdev, card);
card->pdev = pdev;
card->status = pci_alloc_consistent(pdev, sizeof(card_status_t),
&card->status_address);
if (card->status == NULL) {
wanxl_pci_remove_one(pdev);
return -ENOBUFS;
}
#ifdef DEBUG_PCI
printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
" at 0x%LX\n", pci_name(pdev),
(unsigned long long)card->status_address);
#endif
/* FIXME when PCI/DMA subsystems are fixed.
We set both dma_mask and consistent_dma_mask back to 32 bits
to indicate the card can do 32-bit DMA addressing */
if (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) ||
pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
printk(KERN_ERR "wanXL: No usable DMA configuration\n");
wanxl_pci_remove_one(pdev);
return -EIO;
}
/* set up PLX mapping */
plx_phy = pci_resource_start(pdev, 0);
card->plx = ioremap_nocache(plx_phy, 0x70);
if (!card->plx) {
printk(KERN_ERR "wanxl: ioremap() failed\n");
wanxl_pci_remove_one(pdev);
return -EFAULT;
}
#if RESET_WHILE_LOADING
wanxl_reset(card);
#endif
timeout = jiffies + 20 * HZ;
while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
if (time_before(timeout, jiffies)) {
printk(KERN_WARNING "wanXL %s: timeout waiting for"
" PUTS to complete\n", pci_name(pdev));
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
switch(stat & 0xC0) {
case 0x00: /* hmm - PUTS completed with non-zero code? */
case 0x80: /* PUTS still testing the hardware */
break;
default:
printk(KERN_WARNING "wanXL %s: PUTS test 0x%X"
" failed\n", pci_name(pdev), stat & 0x30);
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
schedule();
}
/* get on-board memory size (PUTS detects no more than 4 MB) */
ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;
/* set up on-board RAM mapping */
mem_phy = pci_resource_start(pdev, 2);
/* sanity check the board's reported memory size */
if (ramsize < BUFFERS_ADDR +
(TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
printk(KERN_WARNING "wanXL %s: no enough on-board RAM"
" (%u bytes detected, %u bytes required)\n",
pci_name(pdev), ramsize, BUFFERS_ADDR +
(TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
printk(KERN_WARNING "wanXL %s: unable to Set Byte Swap"
" Mode\n", pci_name(pdev));
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
for (i = 0; i < RX_QUEUE_LENGTH; i++) {
struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
card->rx_skbs[i] = skb;
if (skb)
card->status->rx_descs[i].address =
pci_map_single(card->pdev, skb->data,
BUFFER_LENGTH,
PCI_DMA_FROMDEVICE);
}
mem = ioremap_nocache(mem_phy, PDM_OFFSET + sizeof(firmware));
if (!mem) {
printk(KERN_ERR "wanxl: ioremap() failed\n");
wanxl_pci_remove_one(pdev);
return -EFAULT;
}
for (i = 0; i < sizeof(firmware); i += 4)
writel(htonl(*(u32*)(firmware + i)), mem + PDM_OFFSET + i);
for (i = 0; i < ports; i++)
writel(card->status_address +
(void *)&card->status->port_status[i] -
(void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
writel(card->status_address, mem + PDM_OFFSET + 20);
writel(PDM_OFFSET, mem);
iounmap(mem);
writel(0, card->plx + PLX_MAILBOX_5);
if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
printk(KERN_WARNING "wanXL %s: unable to Abort and Jump\n",
pci_name(pdev));
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
stat = 0;
timeout = jiffies + 5 * HZ;
do {
if ((stat = readl(card->plx + PLX_MAILBOX_5)) != 0)
break;
schedule();
}while (time_after(timeout, jiffies));
if (!stat) {
printk(KERN_WARNING "wanXL %s: timeout while initializing card"
"firmware\n", pci_name(pdev));
wanxl_pci_remove_one(pdev);
return -ENODEV;
}
#if DETECT_RAM
ramsize = stat;
#endif
printk(KERN_INFO "wanXL %s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);
/* Allocate IRQ */
if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
printk(KERN_WARNING "wanXL %s: could not allocate IRQ%i.\n",
pci_name(pdev), pdev->irq);
wanxl_pci_remove_one(pdev);
return -EBUSY;
}
card->irq = pdev->irq;
for (i = 0; i < ports; i++) {
hdlc_device *hdlc;
port_t *port = &card->ports[i];
struct net_device *dev = alloc_hdlcdev(port);
if (!dev) {
printk(KERN_ERR "wanXL %s: unable to allocate"
" memory\n", pci_name(pdev));
wanxl_pci_remove_one(pdev);
return -ENOMEM;
}
port->dev = dev;
hdlc = dev_to_hdlc(dev);
spin_lock_init(&port->lock);
SET_MODULE_OWNER(dev);
dev->tx_queue_len = 50;
dev->do_ioctl = wanxl_ioctl;
dev->open = wanxl_open;
dev->stop = wanxl_close;
hdlc->attach = wanxl_attach;
hdlc->xmit = wanxl_xmit;
dev->get_stats = wanxl_get_stats;
port->card = card;
port->node = i;
get_status(port)->clocking = CLOCK_EXT;
if (register_hdlc_device(dev)) {
printk(KERN_ERR "wanXL %s: unable to register hdlc"
" device\n", pci_name(pdev));
free_netdev(dev);
wanxl_pci_remove_one(pdev);
return -ENOBUFS;
}
card->n_ports++;
}
printk(KERN_INFO "wanXL %s: port", pci_name(pdev));
for (i = 0; i < ports; i++)
printk("%s #%i: %s", i ? "," : "", i,
card->ports[i].dev->name);
printk("\n");
for (i = 0; i < ports; i++)
wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/
return 0;
}
static struct pci_device_id wanxl_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
PCI_ANY_ID, 0, 0, 0 },
{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
PCI_ANY_ID, 0, 0, 0 },
{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
PCI_ANY_ID, 0, 0, 0 },
{ 0, }
};
static struct pci_driver wanxl_pci_driver = {
.name = "wanXL",
.id_table = wanxl_pci_tbl,
.probe = wanxl_pci_init_one,
.remove = wanxl_pci_remove_one,
};
static int __init wanxl_init_module(void)
{
#ifdef MODULE
printk(KERN_INFO "%s\n", version);
#endif
return pci_register_driver(&wanxl_pci_driver);
}
static void __exit wanxl_cleanup_module(void)
{
pci_unregister_driver(&wanxl_pci_driver);
}
MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);
module_init(wanxl_init_module);
module_exit(wanxl_cleanup_module);
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