/*
- * xircom_cb: A driver for the (tulip-like) Xircom Cardbus ethernet cards
+ * xircom_cb: A driver for the (tulip-like) Xircom Cardbus ethernet cards
*
* This software is (C) by the respective authors, and licensed under the GPL
* License.
*
* Written by Arjan van de Ven for Red Hat, Inc.
- * Based on work by Jeff Garzik, Doug Ledford and Donald Becker
+ * Based on work by Jeff Garzik, Doug Ledford and Donald Becker
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
#include <asm/uaccess.h>
#include <asm/io.h>
-#ifdef CONFIG_NET_POLL_CONTROLLER
-#include <asm/irq.h>
-#endif
#ifdef DEBUG
#define enter(x) printk("Enter: %s, %s line %i\n",x,__FILE__,__LINE__)
unsigned long io_port;
int open;
-
+
/* transmit_used is the rotating counter that indicates which transmit
descriptor has to be used next */
int transmit_used;
MODULE_DEVICE_TABLE(pci, xircom_pci_table);
static struct pci_driver xircom_ops = {
- .name = "xircom_cb",
- .id_table = xircom_pci_table,
- .probe = xircom_probe,
- .remove = xircom_remove,
+ .name = "xircom_cb",
+ .id_table = xircom_pci_table,
+ .probe = xircom_probe,
+ .remove = xircom_remove,
.suspend =NULL,
.resume =NULL
};
buffer[i2++]='1';
else
buffer[i2++]='0';
- if ((i&3)==0)
+ if ((i&3)==0)
buffer[i2++]=' ';
}
printk("%s\n",buffer);
/* xircom_probe is the code that gets called on device insertion.
it sets up the hardware and registers the device to the networklayer.
-
+
TODO: Send 1 or 2 "dummy" packets here as the card seems to discard the
first two packets that get send, and pump hates that.
-
+
*/
static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
unsigned long flags;
unsigned short tmp16;
enter("xircom_probe");
-
+
/* First do the PCI initialisation */
if (pci_enable_device(pdev))
/* disable all powermanagement */
pci_write_config_dword(pdev, PCI_POWERMGMT, 0x0000);
-
+
pci_set_master(pdev); /* Why isn't this done by pci_enable_device ?*/
- /* clear PCI status, if any */
- pci_read_config_word (pdev,PCI_STATUS, &tmp16);
+ /* clear PCI status, if any */
+ pci_read_config_word (pdev,PCI_STATUS, &tmp16);
pci_write_config_word (pdev, PCI_STATUS,tmp16);
-
+
pci_read_config_byte(pdev, PCI_REVISION_ID, &chip_rev);
-
+
if (!request_region(pci_resource_start(pdev, 0), 128, "xircom_cb")) {
printk(KERN_ERR "xircom_probe: failed to allocate io-region\n");
return -ENODEV;
}
- /*
+ /*
Before changing the hardware, allocate the memory.
This way, we can fail gracefully if not enough memory
- is available.
+ is available.
*/
dev = alloc_etherdev(sizeof(struct xircom_private));
if (!dev) {
goto device_fail;
}
private = netdev_priv(dev);
-
+
/* Allocate the send/receive buffers */
private->rx_buffer = pci_alloc_consistent(pdev,8192,&private->rx_dma_handle);
if (private->rx_buffer == NULL) {
printk(KERN_ERR "xircom_probe: no memory for rx buffer \n");
goto rx_buf_fail;
- }
+ }
private->tx_buffer = pci_alloc_consistent(pdev,8192,&private->tx_dma_handle);
if (private->tx_buffer == NULL) {
printk(KERN_ERR "xircom_probe: no memory for tx buffer \n");
spin_lock_init(&private->lock);
dev->irq = pdev->irq;
dev->base_addr = private->io_port;
-
+
initialize_card(private);
read_mac_address(private);
setup_descriptors(private);
-
+
dev->open = &xircom_open;
dev->hard_start_xmit = &xircom_start_xmit;
dev->stop = &xircom_close;
printk(KERN_ERR "xircom_probe: netdevice registration failed.\n");
goto reg_fail;
}
-
+
printk(KERN_INFO "%s: Xircom cardbus revision %i at irq %i \n", dev->name, chip_rev, pdev->irq);
/* start the transmitter to get a heartbeat */
/* TODO: send 2 dummy packets here */
transceiver_voodoo(private);
-
+
spin_lock_irqsave(&private->lock,flags);
activate_transmitter(private);
activate_receiver(private);
spin_unlock_irqrestore(&private->lock,flags);
-
+
trigger_receive(private);
-
+
leave("xircom_probe");
return 0;
free_netdev(dev);
pci_set_drvdata(pdev, NULL);
leave("xircom_remove");
-}
+}
static irqreturn_t xircom_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
{
spin_lock(&card->lock);
status = inl(card->io_port+CSR5);
-#ifdef DEBUG
+#ifdef DEBUG
print_binary(status);
printk("tx status 0x%08x 0x%08x \n",card->tx_buffer[0],card->tx_buffer[4]);
printk("rx status 0x%08x 0x%08x \n",card->rx_buffer[0],card->rx_buffer[4]);
-#endif
+#endif
/* Handle shared irq and hotplug */
if (status == 0 || status == 0xffffffff) {
spin_unlock(&card->lock);
netif_carrier_on(dev);
else
netif_carrier_off(dev);
-
+
}
- /* Clear all remaining interrupts */
+ /* Clear all remaining interrupts */
status |= 0xffffffff; /* FIXME: make this clear only the
real existing bits */
outl(status,card->io_port+CSR5);
+
-
- for (i=0;i<NUMDESCRIPTORS;i++)
+ for (i=0;i<NUMDESCRIPTORS;i++)
investigate_write_descriptor(dev,card,i,bufferoffsets[i]);
- for (i=0;i<NUMDESCRIPTORS;i++)
+ for (i=0;i<NUMDESCRIPTORS;i++)
investigate_read_descriptor(dev,card,i,bufferoffsets[i]);
-
+
spin_unlock(&card->lock);
leave("xircom_interrupt");
return IRQ_HANDLED;
int nextdescriptor;
int desc;
enter("xircom_start_xmit");
-
+
card = netdev_priv(dev);
spin_lock_irqsave(&card->lock,flags);
-
+
/* First see if we can free some descriptors */
- for (desc=0;desc<NUMDESCRIPTORS;desc++)
+ for (desc=0;desc<NUMDESCRIPTORS;desc++)
investigate_write_descriptor(dev,card,desc,bufferoffsets[desc]);
-
-
+
+
nextdescriptor = (card->transmit_used +1) % (NUMDESCRIPTORS);
desc = card->transmit_used;
-
+
/* only send the packet if the descriptor is free */
if (card->tx_buffer[4*desc]==0) {
/* Copy the packet data; zero the memory first as the card
sometimes sends more than you ask it to. */
-
+
memset(&card->tx_buffer[bufferoffsets[desc]/4],0,1536);
memcpy(&(card->tx_buffer[bufferoffsets[desc]/4]),skb->data,skb->len);
-
-
+
+
/* FIXME: The specification tells us that the length we send HAS to be a multiple of
4 bytes. */
-
+
card->tx_buffer[4*desc+1] = skb->len;
if (desc == NUMDESCRIPTORS-1)
card->tx_buffer[4*desc+1] |= (1<<25); /* bit 25: last descriptor of the ring */
card->tx_buffer[4*desc+1] |= 0xF0000000;
- /* 0xF0... means want interrupts*/
+ /* 0xF0... means want interrupts*/
card->tx_skb[desc] = skb;
-
+
wmb();
/* This gives the descriptor to the card */
card->tx_buffer[4*desc] = 0x80000000;
netif_stop_queue(dev);
}
card->transmit_used = nextdescriptor;
- leave("xircom-start_xmit - sent");
+ leave("xircom-start_xmit - sent");
spin_unlock_irqrestore(&card->lock,flags);
return 0;
}
-
+
/* Uh oh... no free descriptor... drop the packet */
netif_stop_queue(dev);
spin_unlock_irqrestore(&card->lock,flags);
trigger_transmit(card);
-
+
return -EIO;
}
int retval;
enter("xircom_open");
printk(KERN_INFO "xircom cardbus adaptor found, registering as %s, using irq %i \n",dev->name,dev->irq);
- retval = request_irq(dev->irq, &xircom_interrupt, IRQF_SHARED, dev->name, dev);
+ retval = request_irq(dev->irq, &xircom_interrupt, SA_SHIRQ, dev->name, dev);
if (retval) {
leave("xircom_open - No IRQ");
return retval;
}
-
+
xircom_up(xp);
xp->open = 1;
leave("xircom_open");
{
struct xircom_private *card;
unsigned long flags;
-
+
enter("xircom_close");
card = netdev_priv(dev);
netif_stop_queue(dev); /* we don't want new packets */
-
+
spin_lock_irqsave(&card->lock,flags);
-
+
disable_all_interrupts(card);
-#if 0
+#if 0
/* We can enable this again once we send dummy packets on ifconfig ethX up */
deactivate_receiver(card);
deactivate_transmitter(card);
-#endif
+#endif
remove_descriptors(card);
-
+
spin_unlock_irqrestore(&card->lock,flags);
-
+
card->open = 0;
free_irq(dev->irq,dev);
-
+
leave("xircom_close");
-
+
return 0;
-
+
}
{
struct xircom_private *card = netdev_priv(dev);
return &card->stats;
-}
-
+}
+
#ifdef CONFIG_NET_POLL_CONTROLLER
static void xircom_poll_controller(struct net_device *dev)
outl(val, card->io_port + CSR0);
- val = 0; /* Value 0x00 is a safe and conservative value
+ val = 0; /* Value 0x00 is a safe and conservative value
for the PCI configuration settings */
outl(val, card->io_port + CSR0);
enter("setup_descriptors");
- BUG_ON(card->rx_buffer == NULL);
- BUG_ON(card->tx_buffer == NULL);
+ if (card->rx_buffer == NULL)
+ BUG();
+ if (card->tx_buffer == NULL)
+ BUG();
/* Receive descriptors */
memset(card->rx_buffer, 0, 128); /* clear the descriptors */
/* Rx Descr2: address of the buffer
we store the buffer at the 2nd half of the page */
-
+
address = (unsigned long) card->rx_dma_handle;
card->rx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]);
/* Rx Desc3: address of 2nd buffer -> 0 */
card->rx_buffer[i*4 + 3] = 0;
}
-
+
wmb();
/* Write the receive descriptor ring address to the card */
address = (unsigned long) card->rx_dma_handle;
- val = cpu_to_le32(address);
+ val = cpu_to_le32(address);
outl(val, card->io_port + CSR3); /* Receive descr list address */
/* transmit descriptors */
memset(card->tx_buffer, 0, 128); /* clear the descriptors */
-
+
for (i=0;i<NUMDESCRIPTORS;i++ ) {
/* Tx Descr0: Empty, we own it, no errors -> 0x00000000 */
card->tx_buffer[i*4 + 0] = 0x00000000;
card->tx_buffer[i*4 + 1] = 1536;
if (i==NUMDESCRIPTORS-1)
card->tx_buffer[i*4 + 1] |= (1 << 25); /* bit 25 is "last descriptor" */
-
+
/* Tx Descr2: address of the buffer
we store the buffer at the 2nd half of the page */
address = (unsigned long) card->tx_dma_handle;
activate_receiver enables the receiver on the card.
Before being allowed to active the receiver, the receiver
must be completely de-activated. To achieve this,
-this code actually disables the receiver first; then it waits for the
+this code actually disables the receiver first; then it waits for the
receiver to become inactive, then it activates the receiver and then
it waits for the receiver to be active.
val = inl(card->io_port + CSR6); /* Operation mode */
-
+
/* If the "active" bit is set and the receiver is already
active, no need to do the expensive thing */
if ((val&2) && (receive_active(card)))
return;
-
-
+
+
val = val & ~2; /* disable the receiver */
outl(val, card->io_port + CSR6);
/*
deactivate_receiver disables the receiver on the card.
-To achieve this this code disables the receiver first;
+To achieve this this code disables the receiver first;
then it waits for the receiver to become inactive.
must be called with the lock held and interrupts disabled.
activate_transmitter enables the transmitter on the card.
Before being allowed to active the transmitter, the transmitter
must be completely de-activated. To achieve this,
-this code actually disables the transmitter first; then it waits for the
+this code actually disables the transmitter first; then it waits for the
transmitter to become inactive, then it activates the transmitter and then
it waits for the transmitter to be active again.
val = inl(card->io_port + CSR6); /* Operation mode */
/* If the "active" bit is set and the receiver is already
- active, no need to do the expensive thing */
+ active, no need to do the expensive thing */
if ((val&(1<<13)) && (transmit_active(card)))
return;
/*
deactivate_transmitter disables the transmitter on the card.
-To achieve this this code disables the transmitter first;
+To achieve this this code disables the transmitter first;
then it waits for the transmitter to become inactive.
must be called with the lock held and interrupts disabled.
{
unsigned int val;
enter("enable_all_interrupts");
-
+
val = 0; /* disable all interrupts */
outl(val, card->io_port + CSR7);
unsigned int val;
enter("enable_promisc");
- val = inl(card->io_port + CSR6);
- val = val | (1 << 6);
+ val = inl(card->io_port + CSR6);
+ val = val | (1 << 6);
outl(val, card->io_port + CSR6);
leave("enable_promisc");
-/*
+/*
link_status() checks the the links status and will return 0 for no link, 10 for 10mbit link and 100 for.. guess what.
Must be called in locked state with interrupts disabled
{
unsigned int val;
enter("link_status");
-
+
val = inb(card->io_port + CSR12);
-
+
if (!(val&(1<<2))) /* bit 2 is 0 for 10mbit link, 1 for not an 10mbit link */
return 10;
if (!(val&(1<<1))) /* bit 1 is 0 for 100mbit link, 1 for not an 100mbit link */
return 100;
-
- /* If we get here -> no link at all */
+
+ /* If we get here -> no link at all */
leave("link_status");
return 0;
/*
read_mac_address() reads the MAC address from the NIC and stores it in the "dev" structure.
-
+
This function will take the spinlock itself and can, as a result, not be called with the lock helt.
*/
static void read_mac_address(struct xircom_private *card)
int i;
enter("read_mac_address");
-
+
spin_lock_irqsave(&card->lock, flags);
outl(1 << 12, card->io_port + CSR9); /* enable boot rom access */
outl(i + 3, card->io_port + CSR10);
data_count = inl(card->io_port + CSR9) & 0xff;
if ((tuple == 0x22) && (data_id == 0x04) && (data_count == 0x06)) {
- /*
+ /*
* This is it. We have the data we want.
*/
for (j = 0; j < 6; j++) {
spin_lock_irqsave(&card->lock, flags);
outl(0x0008, card->io_port + CSR15);
- udelay(25);
+ udelay(25);
outl(0xa8050000, card->io_port + CSR15);
udelay(25);
outl(0xa00f0000, card->io_port + CSR15);
udelay(25);
-
+
spin_unlock_irqrestore(&card->lock, flags);
netif_start_queue(card->dev);
spin_lock_irqsave(&card->lock, flags);
-
+
enable_link_interrupt(card);
enable_transmit_interrupt(card);
enable_receive_interrupt(card);
enable_common_interrupts(card);
enable_promisc(card);
-
+
/* The card can have received packets already, read them away now */
- for (i=0;i<NUMDESCRIPTORS;i++)
+ for (i=0;i<NUMDESCRIPTORS;i++)
investigate_read_descriptor(card->dev,card,i,bufferoffsets[i]);
/* Bufferoffset is in BYTES */
static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset)
{
- int status;
-
+ int status;
+
enter("investigate_read_descriptor");
status = card->rx_buffer[4*descnr];
-
+
if ((status > 0)) { /* packet received */
-
+
/* TODO: discard error packets */
-
+
short pkt_len = ((status >> 16) & 0x7ff) - 4; /* minus 4, we don't want the CRC */
struct sk_buff *skb;
dev->last_rx = jiffies;
card->stats.rx_packets++;
card->stats.rx_bytes += pkt_len;
-
+
out:
/* give the buffer back to the card */
card->rx_buffer[4*descnr] = 0x80000000;
int status;
enter("investigate_write_descriptor");
-
+
status = card->tx_buffer[4*descnr];
-#if 0
+#if 0
if (status & 0x8000) { /* Major error */
printk(KERN_ERR "Major transmit error status %x \n", status);
card->tx_buffer[4*descnr] = 0;
}
leave("investigate_write_descriptor");
-
+
}
static int __init xircom_init(void)
{
- return pci_register_driver(&xircom_ops);
+ pci_register_driver(&xircom_ops);
+ return 0;
}
static void __exit xircom_exit(void)
{
pci_unregister_driver(&xircom_ops);
-}
+}
-module_init(xircom_init)
+module_init(xircom_init)
module_exit(xircom_exit)
git://git.onelab.eu / linux-2.6.git / blobdiff