diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-05-20 18:15:19 +0400 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-12 11:21:25 +0400 |
commit | a88394cfb58007cca945699545469017beb0d206 (patch) | |
tree | 7efa1efcaf18d1b8f7bede1f25acdfc0c657c086 /drivers/net/tulip/xircom_cb.c | |
parent | 5ff2241dd42ade03572753f9ed7743719b47c474 (diff) | |
download | linux-a88394cfb58007cca945699545469017beb0d206.tar.xz |
ewrk3/tulip: Move the DEC - Tulip drivers
Move the DEC - Tulip driver into drivers/net/ethernet/dec/tulip/
and make the necessary Kconfig and Makefile changes.
The Digital Equioment (DEC) driver ewrk3 was moved into
drivers/net/ethernet/dec/ and the remaining drivers (Tulip)
were moved into drivers/net/ethernet/dec/tulip/
CC: Tobias Ringstrom <tori@unhappy.mine.nu>
CC: Grant Grundler <grundler@parisc-linux.org>
CC: David Davies <davies@maniac.ultranet.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Diffstat (limited to 'drivers/net/tulip/xircom_cb.c')
-rw-r--r-- | drivers/net/tulip/xircom_cb.c | 1154 |
1 files changed, 0 insertions, 1154 deletions
diff --git a/drivers/net/tulip/xircom_cb.c b/drivers/net/tulip/xircom_cb.c deleted file mode 100644 index 988b8eb24d37..000000000000 --- a/drivers/net/tulip/xircom_cb.c +++ /dev/null @@ -1,1154 +0,0 @@ -/* - * 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) - |