+++ /dev/null
-/*
- * 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
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- *
- * $Id: xircom_cb.c,v 1.33 2001/03/19 14:02:07 arjanv Exp $
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#ifdef CONFIG_NET_POLL_CONTROLLER
-#include <asm/irq.h>
-#endif
-
-MODULE_DESCRIPTION("Xircom Cardbus ethernet driver");
-MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>");
-MODULE_LICENSE("GPL");
-
-
-
-/* IO registers on the card, offsets */
-#define CSR0 0x00
-#define CSR1 0x08
-#define CSR2 0x10
-#define CSR3 0x18
-#define CSR4 0x20
-#define CSR5 0x28
-#define CSR6 0x30
-#define CSR7 0x38
-#define CSR8 0x40
-#define CSR9 0x48
-#define CSR10 0x50
-#define CSR11 0x58
-#define CSR12 0x60
-#define CSR13 0x68
-#define CSR14 0x70
-#define CSR15 0x78
-#define CSR16 0x80
-
-/* PCI registers */
-#define PCI_POWERMGMT 0x40
-
-/* Offsets of the buffers within the descriptor pages, in bytes */
-
-#define NUMDESCRIPTORS 4
-
-static int bufferoffsets[NUMDESCRIPTORS] = {128,2048,4096,6144};
-
-
-struct xircom_private {
- /* Send and receive buffers, kernel-addressable and dma addressable forms */
-
- __le32 *rx_buffer;
- __le32 *tx_buffer;
-
- dma_addr_t rx_dma_handle;
- dma_addr_t tx_dma_handle;
-
- struct sk_buff *tx_skb[4];
-
- 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;
-
- /* Spinlock to serialize register operations.
- It must be helt while manipulating the following registers:
- CSR0, CSR6, CSR7, CSR9, CSR10, CSR15
- */
- spinlock_t lock;
-
- struct pci_dev *pdev;
- struct net_device *dev;
-};
-
-
-/* Function prototypes */
-static int xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id);
-static void xircom_remove(struct pci_dev *pdev);
-static irqreturn_t xircom_interrupt(int irq, void *dev_instance);
-static netdev_tx_t xircom_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-static int xircom_open(struct net_device *dev);
-static int xircom_close(struct net_device *dev);
-static void xircom_up(struct xircom_private *card);
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void xircom_poll_controller(struct net_device *dev);
-#endif
-
-static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset);
-static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset);
-static void read_mac_address(struct xircom_private *card);
-static void transceiver_voodoo(struct xircom_private *card);
-static void initialize_card(struct xircom_private *card);
-static void trigger_transmit(struct xircom_private *card);
-static void trigger_receive(struct xircom_private *card);
-static void setup_descriptors(struct xircom_private *card);
-static void remove_descriptors(struct xircom_private *card);
-static int link_status_changed(struct xircom_private *card);
-static void activate_receiver(struct xircom_private *card);
-static void deactivate_receiver(struct xircom_private *card);
-static void activate_transmitter(struct xircom_private *card);
-static void deactivate_transmitter(struct xircom_private *card);
-static void enable_transmit_interrupt(struct xircom_private *card);
-static void enable_receive_interrupt(struct xircom_private *card);
-static void enable_link_interrupt(struct xircom_private *card);
-static void disable_all_interrupts(struct xircom_private *card);
-static int link_status(struct xircom_private *card);
-
-
-
-static DEFINE_PCI_DEVICE_TABLE(xircom_pci_table) = {
- {0x115D, 0x0003, PCI_ANY_ID, PCI_ANY_ID,},
- {0,},
-};
-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,
- .suspend =NULL,
- .resume =NULL
-};
-
-
-#if defined DEBUG && DEBUG > 1
-static void print_binary(unsigned int number)
-{
- int i,i2;
- char buffer[64];
- memset(buffer,0,64);
- i2=0;
- for (i=31;i>=0;i--) {
- if (number & (1<<i))
- buffer[i2++]='1';
- else
- buffer[i2++]='0';
- if ((i&3)==0)
- buffer[i2++]=' ';
- }
- pr_debug("%s\n",buffer);
-}
-#endif
-
-static const struct net_device_ops netdev_ops = {
- .ndo_open = xircom_open,
- .ndo_stop = xircom_close,
- .ndo_start_xmit = xircom_start_xmit,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-#ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_poll_controller = xircom_poll_controller,
-#endif
-};
-
-/* 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)
-{
- struct net_device *dev = NULL;
- struct xircom_private *private;
- unsigned long flags;
- unsigned short tmp16;
-
- /* First do the PCI initialisation */
-
- if (pci_enable_device(pdev))
- return -ENODEV;
-
- /* 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);
- pci_write_config_word (pdev, PCI_STATUS,tmp16);
-
- if (!request_region(pci_resource_start(pdev, 0), 128, "xircom_cb")) {
- pr_err("%s: failed to allocate io-region\n", __func__);
- return -ENODEV;
- }
-
- /*
- Before changing the hardware, allocate the memory.
- This way, we can fail gracefully if not enough memory
- is available.
- */
- dev = alloc_etherdev(sizeof(struct xircom_private));
- if (!dev) {
- pr_err("%s: failed to allocate etherdev\n", __func__);
- 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) {
- pr_err("%s: no memory for rx buffer\n", __func__);
- goto rx_buf_fail;
- }
- private->tx_buffer = pci_alloc_consistent(pdev,8192,&private->tx_dma_handle);
- if (private->tx_buffer == NULL) {
- pr_err("%s: no memory for tx buffer\n", __func__);
- goto tx_buf_fail;
- }
-
- SET_NETDEV_DEV(dev, &pdev->dev);
-
-
- private->dev = dev;
- private->pdev = pdev;
- private->io_port = pci_resource_start(pdev, 0);
- 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->netdev_ops = &netdev_ops;
- pci_set_drvdata(pdev, dev);
-
- if (register_netdev(dev)) {
- pr_err("%s: netdevice registration failed\n", __func__);
- goto reg_fail;
- }
-
- netdev_info(dev, "Xircom cardbus revision %i at irq %i\n",
- pdev->revision, 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);
-
- return 0;
-
-reg_fail:
- kfree(private->tx_buffer);
-tx_buf_fail:
- kfree(private->rx_buffer);
-rx_buf_fail:
- free_netdev(dev);
-device_fail:
- return -ENODEV;
-}
-
-
-/*
- xircom_remove is called on module-unload or on device-eject.
- it unregisters the irq, io-region and network device.
- Interrupts and such are already stopped in the "ifconfig ethX down"
- code.
- */
-static void __devexit xircom_remove(struct pci_dev *pdev)
-{
- struct net_device *dev = pci_get_drvdata(pdev);
- struct xircom_private *card = netdev_priv(dev);
-
- pci_free_consistent(pdev,8192,card->rx_buffer,card->rx_dma_handle);
- pci_free_consistent(pdev,8192,card->tx_buffer,card->tx_dma_handle);
-
- release_region(dev->base_addr, 128);
- unregister_netdev(dev);
- free_netdev(dev);
- pci_set_drvdata(pdev, NULL);
-}
-
-static irqreturn_t xircom_interrupt(int irq, void *dev_instance)
-{
- struct net_device *dev = (struct net_device *) dev_instance;
- struct xircom_private *card = netdev_priv(dev);
- unsigned int status;
- int i;
-
- spin_lock(&card->lock);
- status = inl(card->io_port+CSR5);
-
-#if defined DEBUG && DEBUG > 1
- print_binary(status);
- pr_debug("tx status 0x%08x 0x%08x\n",
- card->tx_buffer[0], card->tx_buffer[4]);
- pr_debug("rx status 0x%08x 0x%08x\n",
- card->rx_buffer[0], card->rx_buffer[4]);
-#endif
- /* Handle shared irq and hotplug */
- if (status == 0 || status == 0xffffffff) {
- spin_unlock(&card->lock);
- return IRQ_NONE;
- }
-
- if (link_status_changed(card)) {
- int newlink;
- netdev_dbg(dev, "Link status has changed\n");
- newlink = link_status(card);
- netdev_info(dev, "Link is %d mbit\n", newlink);
- if (newlink)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
-
- }
-
- /* 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++)
- investigate_write_descriptor(dev,card,i,bufferoffsets[i]);
- for (i=0;i<NUMDESCRIPTORS;i++)
- investigate_read_descriptor(dev,card,i,bufferoffsets[i]);
-
- spin_unlock(&card->lock);
- return IRQ_HANDLED;
-}
-
-static netdev_tx_t xircom_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct xircom_private *card;
- unsigned long flags;
- int nextdescriptor;
- int desc;
-
- card = netdev_priv(dev);
- spin_lock_irqsave(&card->lock,flags);
-
- /* First see if we can free some descriptors */
- 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);
- skb_copy_from_linear_data(skb,
- &(card->tx_buffer[bufferoffsets[desc] / 4]),
- 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] = cpu_to_le32(skb->len);
- if (desc == NUMDESCRIPTORS - 1) /* bit 25: last descriptor of the ring */
- card->tx_buffer[4*desc+1] |= cpu_to_le32(1<<25);
-
- card->tx_buffer[4*desc+1] |= cpu_to_le32(0xF0000000);
- /* 0xF0... means want interrupts*/
- card->tx_skb[desc] = skb;
-
- wmb();
- /* This gives the descriptor to the card */
- card->tx_buffer[4*desc] = cpu_to_le32(0x80000000);
- trigger_transmit(card);
- if (card->tx_buffer[nextdescriptor*4] & cpu_to_le32(0x8000000)) {
- /* next descriptor is occupied... */
- netif_stop_queue(dev);
- }
- card->transmit_used = nextdescriptor;
- spin_unlock_irqrestore(&card->lock,flags);
- return NETDEV_TX_OK;
- }
-
- /* Uh oh... no free descriptor... drop the packet */
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&card->lock,flags);
- trigger_transmit(card);
-
- return NETDEV_TX_BUSY;
-}
-
-
-
-
-static int xircom_open(struct net_device *dev)
-{
- struct xircom_private *xp = netdev_priv(dev);
- int retval;
-
- netdev_info(dev, "xircom cardbus adaptor found, using irq %i\n",
- dev->irq);
- retval = request_irq(dev->irq, xircom_interrupt, IRQF_SHARED, dev->name, dev);
- if (retval)
- return retval;
-
- xircom_up(xp);
- xp->open = 1;
-
- return 0;
-}
-
-static int xircom_close(struct net_device *dev)
-{
- struct xircom_private *card;
- unsigned long flags;
-
- 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
- /* We can enable this again once we send dummy packets on ifconfig ethX up */
- deactivate_receiver(card);
- deactivate_transmitter(card);
-#endif
- remove_descriptors(card);
-
- spin_unlock_irqrestore(&card->lock,flags);
-
- card->open = 0;
- free_irq(dev->irq,dev);
-
- return 0;
-
-}
-
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void xircom_poll_controller(struct net_device *dev)
-{
- disable_irq(dev->irq);
- xircom_interrupt(dev->irq, dev);
- enable_irq(dev->irq);
-}
-#endif
-
-
-static void initialize_card(struct xircom_private *card)
-{
- unsigned int val;
- unsigned long flags;
-
- spin_lock_irqsave(&card->lock, flags);
-
- /* First: reset the card */
- val = inl(card->io_port + CSR0);
- val |= 0x01; /* Software reset */
- outl(val, card->io_port + CSR0);
-
- udelay(100); /* give the card some time to reset */
-
- val = inl(card->io_port + CSR0);
- val &= ~0x01; /* disable Software reset */
- outl(val, card->io_port + CSR0);
-
-
- val = 0; /* Value 0x00 is a safe and conservative value
- for the PCI configuration settings */
- outl(val, card->io_port + CSR0);
-
-
- disable_all_interrupts(card);
- deactivate_receiver(card);
- deactivate_transmitter(card);
-
- spin_unlock_irqrestore(&card->lock, flags);
-}
-
-/*
-trigger_transmit causes the card to check for frames to be transmitted.
-This is accomplished by writing to the CSR1 port. The documentation
-claims that the act of writing is sufficient and that the value is
-ignored; I chose zero.
-*/
-static void trigger_transmit(struct xircom_private *card)
-{
- unsigned int val;
-
- val = 0;
- outl(val, card->io_port + CSR1);
-}
-
-/*
-trigger_receive causes the card to check for empty frames in the
-descriptor list in which packets can be received.
-This is accomplished by writing to the CSR2 port. The documentation
-claims that the act of writing is sufficient and that the value is
-ignored; I chose zero.
-*/
-static void trigger_receive(struct xircom_private *card)
-{
- unsigned int val;
-
- val = 0;
- outl(val, card->io_port + CSR2);
-}
-
-/*
-setup_descriptors initializes the send and receive buffers to be valid
-descriptors and programs the addresses into the card.
-*/
-static void setup_descriptors(struct xircom_private *card)
-{
- u32 address;
- int i;
-
- BUG_ON(card->rx_buffer == NULL);
- BUG_ON(card->tx_buffer == NULL);
-
- /* Receive descriptors */
- memset(card->rx_buffer, 0, 128); /* clear the descriptors */
- for (i=0;i<NUMDESCRIPTORS;i++ ) {
-
- /* Rx Descr0: It's empty, let the card own it, no errors -> 0x80000000 */
- card->rx_buffer[i*4 + 0] = cpu_to_le32(0x80000000);
- /* Rx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */
- card->rx_buffer[i*4 + 1] = cpu_to_le32(1536);
- if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */
- card->rx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25);
-
- /* Rx Descr2: address of the buffer
- we store the buffer at the 2nd half of the page */
-
- address = 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 = card->rx_dma_handle;
- outl(address, 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;
- /* Tx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */
- card->tx_buffer[i*4 + 1] = cpu_to_le32(1536);
- if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */
- card->tx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25);
-
- /* Tx Descr2: address of the buffer
- we store the buffer at the 2nd half of the page */
- address = card->tx_dma_handle;
- card->tx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]);
- /* Tx Desc3: address of 2nd buffer -> 0 */
- card->tx_buffer[i*4 + 3] = 0;
- }
-
- wmb();
- /* wite the transmit descriptor ring to the card */
- address = card->tx_dma_handle;
- outl(address, card->io_port + CSR4); /* xmit descr list address */
-}
-
-/*
-remove_descriptors informs the card the descriptors are no longer
-valid by setting the address in the card to 0x00.
-*/
-static void remove_descriptors(struct xircom_private *card)
-{
- unsigned int val;
-
- val = 0;
- outl(val, card->io_port + CSR3); /* Receive descriptor address */
- outl(val, card->io_port + CSR4); /* Send descriptor address */
-}
-
-/*
-link_status_changed returns 1 if the card has indicated that
-the link status has changed. The new link status has to be read from CSR12.
-
-This function also clears the status-bit.
-*/
-static int link_status_changed(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR5); /* Status register */
-
- if ((val & (1 << 27)) == 0) /* no change */
- return 0;
-
- /* clear the event by writing a 1 to the bit in the
- status register. */
- val = (1 << 27);
- outl(val, card->io_port + CSR5);
-
- return 1;
-}
-
-
-/*
-transmit_active returns 1 if the transmitter on the card is
-in a non-stopped state.
-*/
-static int transmit_active(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR5); /* Status register */
-
- if ((val & (7 << 20)) == 0) /* transmitter disabled */
- return 0;
-
- return 1;
-}
-
-/*
-receive_active returns 1 if the receiver on the card is
-in a non-stopped state.
-*/
-static int receive_active(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR5); /* Status register */
-
- if ((val & (7 << 17)) == 0) /* receiver disabled */
- return 0;
-
- return 1;
-}
-
-/*
-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
-receiver to become inactive, then it activates the receiver and then
-it waits for the receiver to be active.
-
-must be called with the lock held and interrupts disabled.
-*/
-static void activate_receiver(struct xircom_private *card)
-{
- unsigned int val;
- int counter;
-
- 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);
-
- counter = 10;
- while (counter > 0) {
- if (!receive_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev, "Receiver failed to deactivate\n");
- }
-
- /* enable the receiver */
- val = inl(card->io_port + CSR6); /* Operation mode */
- val = val | 2; /* enable the receiver */
- outl(val, card->io_port + CSR6);
-
- /* now wait for the card to activate again */
- counter = 10;
- while (counter > 0) {
- if (receive_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev,
- "Receiver failed to re-activate\n");
- }
-}
-
-/*
-deactivate_receiver disables the receiver on the card.
-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.
-*/
-static void deactivate_receiver(struct xircom_private *card)
-{
- unsigned int val;
- int counter;
-
- val = inl(card->io_port + CSR6); /* Operation mode */
- val = val & ~2; /* disable the receiver */
- outl(val, card->io_port + CSR6);
-
- counter = 10;
- while (counter > 0) {
- if (!receive_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev, "Receiver failed to deactivate\n");
- }
-}
-
-
-/*
-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
-transmitter to become inactive, then it activates the transmitter and then
-it waits for the transmitter to be active again.
-
-must be called with the lock held and interrupts disabled.
-*/
-static void activate_transmitter(struct xircom_private *card)
-{
- unsigned int val;
- int counter;
-
- 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&(1<<13)) && (transmit_active(card)))
- return;
-
- val = val & ~(1 << 13); /* disable the transmitter */
- outl(val, card->io_port + CSR6);
-
- counter = 10;
- while (counter > 0) {
- if (!transmit_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev,
- "Transmitter failed to deactivate\n");
- }
-
- /* enable the transmitter */
- val = inl(card->io_port + CSR6); /* Operation mode */
- val = val | (1 << 13); /* enable the transmitter */
- outl(val, card->io_port + CSR6);
-
- /* now wait for the card to activate again */
- counter = 10;
- while (counter > 0) {
- if (transmit_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev,
- "Transmitter failed to re-activate\n");
- }
-}
-
-/*
-deactivate_transmitter disables the transmitter on the card.
-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.
-*/
-static void deactivate_transmitter(struct xircom_private *card)
-{
- unsigned int val;
- int counter;
-
- val = inl(card->io_port + CSR6); /* Operation mode */
- val = val & ~2; /* disable the transmitter */
- outl(val, card->io_port + CSR6);
-
- counter = 20;
- while (counter > 0) {
- if (!transmit_active(card))
- break;
- /* wait a while */
- udelay(50);
- counter--;
- if (counter <= 0)
- netdev_err(card->dev,
- "Transmitter failed to deactivate\n");
- }
-}
-
-
-/*
-enable_transmit_interrupt enables the transmit interrupt
-
-must be called with the lock held and interrupts disabled.
-*/
-static void enable_transmit_interrupt(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR7); /* Interrupt enable register */
- val |= 1; /* enable the transmit interrupt */
- outl(val, card->io_port + CSR7);
-}
-
-
-/*
-enable_receive_interrupt enables the receive interrupt
-
-must be called with the lock held and interrupts disabled.
-*/
-static void enable_receive_interrupt(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR7); /* Interrupt enable register */
- val = val | (1 << 6); /* enable the receive interrupt */
- outl(val, card->io_port + CSR7);
-}
-
-/*
-enable_link_interrupt enables the link status change interrupt
-
-must be called with the lock held and interrupts disabled.
-*/
-static void enable_link_interrupt(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR7); /* Interrupt enable register */
- val = val | (1 << 27); /* enable the link status chage interrupt */
- outl(val, card->io_port + CSR7);
-}
-
-
-
-/*
-disable_all_interrupts disables all interrupts
-
-must be called with the lock held and interrupts disabled.
-*/
-static void disable_all_interrupts(struct xircom_private *card)
-{
- unsigned int val;
-
- val = 0; /* disable all interrupts */
- outl(val, card->io_port + CSR7);
-}
-
-/*
-enable_common_interrupts enables several weird interrupts
-
-must be called with the lock held and interrupts disabled.
-*/
-static void enable_common_interrupts(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR7); /* Interrupt enable register */
- val |= (1<<16); /* Normal Interrupt Summary */
- val |= (1<<15); /* Abnormal Interrupt Summary */
- val |= (1<<13); /* Fatal bus error */
- val |= (1<<8); /* Receive Process Stopped */
- val |= (1<<7); /* Receive Buffer Unavailable */
- val |= (1<<5); /* Transmit Underflow */
- val |= (1<<2); /* Transmit Buffer Unavailable */
- val |= (1<<1); /* Transmit Process Stopped */
- outl(val, card->io_port + CSR7);
-}
-
-/*
-enable_promisc starts promisc mode
-
-must be called with the lock held and interrupts disabled.
-*/
-static int enable_promisc(struct xircom_private *card)
-{
- unsigned int val;
-
- val = inl(card->io_port + CSR6);
- val = val | (1 << 6);
- outl(val, card->io_port + CSR6);
-
- return 1;
-}
-
-
-
-
-/*
-link_status() checks 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
-*/
-static int link_status(struct xircom_private *card)
-{
- unsigned int val;
-
- 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 */
-
- 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)
-{
- unsigned char j, tuple, link, data_id, data_count;
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&card->lock, flags);
-
- outl(1 << 12, card->io_port + CSR9); /* enable boot rom access */
- for (i = 0x100; i < 0x1f7; i += link + 2) {
- outl(i, card->io_port + CSR10);
- tuple = inl(card->io_port + CSR9) & 0xff;
- outl(i + 1, card->io_port + CSR10);
- link = inl(card->io_port + CSR9) & 0xff;
- outl(i + 2, card->io_port + CSR10);
- data_id = inl(card->io_port + CSR9) & 0xff;
- 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++) {
- outl(i + j + 4, card->io_port + CSR10);
- card->dev->dev_addr[j] = inl(card->io_port + CSR9) & 0xff;
- }
- break;
- } else if (link == 0) {
- break;
- }
- }
- spin_unlock_irqrestore(&card->lock, flags);
- pr_debug(" %pM\n", card->dev->dev_addr);
-}
-
-
-/*
- transceiver_voodoo() enables the external UTP plug thingy.
- it's called voodoo as I stole this code and cannot cross-reference
- it with the specification.
- */
-static void transceiver_voodoo(struct xircom_private *card)
-{
- unsigned long flags;
-
- /* disable all powermanagement */
- pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000);
-
- setup_descriptors(card);
-
- spin_lock_irqsave(&card->lock, flags);
-
- outl(0x0008, card->io_port + CSR15);
- 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);
-}
-
-
-static void xircom_up(struct xircom_private *card)
-{
- unsigned long flags;
- int i;
-
- /* disable all powermanagement */
- pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000);
-
- setup_descriptors(card);
-
- 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++)
- investigate_read_descriptor(card->dev,card,i,bufferoffsets[i]);
-
-
- spin_unlock_irqrestore(&card->lock, flags);
- trigger_receive(card);
- trigger_transmit(card);
- netif_start_queue(card->dev);
-}
-
-/* Bufferoffset is in BYTES */
-static void
-investigate_read_descriptor(struct net_device *dev, struct xircom_private *card,
- int descnr, unsigned int bufferoffset)
-{
- int status;
-
- status = le32_to_cpu(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;
-
- if (pkt_len > 1518) {
- netdev_err(dev, "Packet length %i is bogus\n", pkt_len);
- pkt_len = 1518;
- }
-
- skb = dev_alloc_skb(pkt_len + 2);
- if (skb == NULL) {
- dev->stats.rx_dropped++;
- goto out;
- }
- skb_reserve(skb, 2);
- skb_copy_to_linear_data(skb,
- &card->rx_buffer[bufferoffset / 4],
- pkt_len);
- skb_put(skb, pkt_len);
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
-
-out:
- /* give the buffer back to the card */
- card->rx_buffer[4*descnr] = cpu_to_le32(0x80000000);
- trigger_receive(card);
- }
-}
-
-
-/* Bufferoffset is in BYTES */
-static void
-investigate_write_descriptor(struct net_device *dev,
- struct xircom_private *card,
- int descnr, unsigned int bufferoffset)
-{
- int status;
-
- status = le32_to_cpu(card->tx_buffer[4*descnr]);
-#if 0
- if (status & 0x8000) { /* Major error */
- pr_err("Major transmit error status %x\n", status);
- card->tx_buffer[4*descnr] = 0;
- netif_wake_queue (dev);
- }
-#endif
- if (status > 0) { /* bit 31 is 0 when done */
- if (card->tx_skb[descnr]!=NULL) {
- dev->stats.tx_bytes += card->tx_skb[descnr]->len;
- dev_kfree_skb_irq(card->tx_skb[descnr]);
- }
- card->tx_skb[descnr] = NULL;
- /* Bit 8 in the status field is 1 if there was a collision */
- if (status & (1 << 8))
- dev->stats.collisions++;
- card->tx_buffer[4*descnr] = 0; /* descriptor is free again */
- netif_wake_queue (dev);
- dev->stats.tx_packets++;
- }
-}
-
-static int __init xircom_init(void)
-{
- return pci_register_driver(&xircom_ops);
-}
-
-static void __exit xircom_exit(void)
-{
- pci_unregister_driver(&xircom_ops);
-}
-
-module_init(xircom_init)
-module_exit(xircom_exit)
-
git.openpandora.org / pandora-kernel.git / blobdiff