1a88394cfSJeff Kirsher /* 2a88394cfSJeff Kirsher * xircom_cb: A driver for the (tulip-like) Xircom Cardbus ethernet cards 3a88394cfSJeff Kirsher * 4a88394cfSJeff Kirsher * This software is (C) by the respective authors, and licensed under the GPL 5a88394cfSJeff Kirsher * License. 6a88394cfSJeff Kirsher * 7a88394cfSJeff Kirsher * Written by Arjan van de Ven for Red Hat, Inc. 8a88394cfSJeff Kirsher * Based on work by Jeff Garzik, Doug Ledford and Donald Becker 9a88394cfSJeff Kirsher * 10a88394cfSJeff Kirsher * This software may be used and distributed according to the terms 11a88394cfSJeff Kirsher * of the GNU General Public License, incorporated herein by reference. 12a88394cfSJeff Kirsher * 13a88394cfSJeff Kirsher * 14a88394cfSJeff Kirsher * $Id: xircom_cb.c,v 1.33 2001/03/19 14:02:07 arjanv Exp $ 15a88394cfSJeff Kirsher */ 16a88394cfSJeff Kirsher 17a88394cfSJeff Kirsher #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18a88394cfSJeff Kirsher 19a88394cfSJeff Kirsher #include <linux/module.h> 20a88394cfSJeff Kirsher #include <linux/kernel.h> 21a88394cfSJeff Kirsher #include <linux/string.h> 22a88394cfSJeff Kirsher #include <linux/errno.h> 23a88394cfSJeff Kirsher #include <linux/ioport.h> 24a88394cfSJeff Kirsher #include <linux/slab.h> 25a88394cfSJeff Kirsher #include <linux/interrupt.h> 26a88394cfSJeff Kirsher #include <linux/pci.h> 27a88394cfSJeff Kirsher #include <linux/netdevice.h> 28a88394cfSJeff Kirsher #include <linux/etherdevice.h> 29a88394cfSJeff Kirsher #include <linux/skbuff.h> 30a88394cfSJeff Kirsher #include <linux/delay.h> 31a88394cfSJeff Kirsher #include <linux/init.h> 32a88394cfSJeff Kirsher #include <linux/bitops.h> 33a88394cfSJeff Kirsher 34a88394cfSJeff Kirsher #include <asm/uaccess.h> 35a88394cfSJeff Kirsher #include <asm/io.h> 36a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 37a88394cfSJeff Kirsher #include <asm/irq.h> 38a88394cfSJeff Kirsher #endif 39a88394cfSJeff Kirsher 40a88394cfSJeff Kirsher MODULE_DESCRIPTION("Xircom Cardbus ethernet driver"); 41a88394cfSJeff Kirsher MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>"); 42a88394cfSJeff Kirsher MODULE_LICENSE("GPL"); 43a88394cfSJeff Kirsher 44a88394cfSJeff Kirsher 45a88394cfSJeff Kirsher 46a88394cfSJeff Kirsher /* IO registers on the card, offsets */ 47a88394cfSJeff Kirsher #define CSR0 0x00 48a88394cfSJeff Kirsher #define CSR1 0x08 49a88394cfSJeff Kirsher #define CSR2 0x10 50a88394cfSJeff Kirsher #define CSR3 0x18 51a88394cfSJeff Kirsher #define CSR4 0x20 52a88394cfSJeff Kirsher #define CSR5 0x28 53a88394cfSJeff Kirsher #define CSR6 0x30 54a88394cfSJeff Kirsher #define CSR7 0x38 55a88394cfSJeff Kirsher #define CSR8 0x40 56a88394cfSJeff Kirsher #define CSR9 0x48 57a88394cfSJeff Kirsher #define CSR10 0x50 58a88394cfSJeff Kirsher #define CSR11 0x58 59a88394cfSJeff Kirsher #define CSR12 0x60 60a88394cfSJeff Kirsher #define CSR13 0x68 61a88394cfSJeff Kirsher #define CSR14 0x70 62a88394cfSJeff Kirsher #define CSR15 0x78 63a88394cfSJeff Kirsher #define CSR16 0x80 64a88394cfSJeff Kirsher 65a88394cfSJeff Kirsher /* PCI registers */ 66a88394cfSJeff Kirsher #define PCI_POWERMGMT 0x40 67a88394cfSJeff Kirsher 68a88394cfSJeff Kirsher /* Offsets of the buffers within the descriptor pages, in bytes */ 69a88394cfSJeff Kirsher 70a88394cfSJeff Kirsher #define NUMDESCRIPTORS 4 71a88394cfSJeff Kirsher 72a88394cfSJeff Kirsher static int bufferoffsets[NUMDESCRIPTORS] = {128,2048,4096,6144}; 73a88394cfSJeff Kirsher 74a88394cfSJeff Kirsher 75a88394cfSJeff Kirsher struct xircom_private { 76a88394cfSJeff Kirsher /* Send and receive buffers, kernel-addressable and dma addressable forms */ 77a88394cfSJeff Kirsher 78a88394cfSJeff Kirsher __le32 *rx_buffer; 79a88394cfSJeff Kirsher __le32 *tx_buffer; 80a88394cfSJeff Kirsher 81a88394cfSJeff Kirsher dma_addr_t rx_dma_handle; 82a88394cfSJeff Kirsher dma_addr_t tx_dma_handle; 83a88394cfSJeff Kirsher 84a88394cfSJeff Kirsher struct sk_buff *tx_skb[4]; 85a88394cfSJeff Kirsher 86a88394cfSJeff Kirsher unsigned long io_port; 87a88394cfSJeff Kirsher int open; 88a88394cfSJeff Kirsher 89a88394cfSJeff Kirsher /* transmit_used is the rotating counter that indicates which transmit 90a88394cfSJeff Kirsher descriptor has to be used next */ 91a88394cfSJeff Kirsher int transmit_used; 92a88394cfSJeff Kirsher 93a88394cfSJeff Kirsher /* Spinlock to serialize register operations. 94a88394cfSJeff Kirsher It must be helt while manipulating the following registers: 95a88394cfSJeff Kirsher CSR0, CSR6, CSR7, CSR9, CSR10, CSR15 96a88394cfSJeff Kirsher */ 97a88394cfSJeff Kirsher spinlock_t lock; 98a88394cfSJeff Kirsher 99a88394cfSJeff Kirsher struct pci_dev *pdev; 100a88394cfSJeff Kirsher struct net_device *dev; 101a88394cfSJeff Kirsher }; 102a88394cfSJeff Kirsher 103a88394cfSJeff Kirsher 104a88394cfSJeff Kirsher /* Function prototypes */ 105a88394cfSJeff Kirsher static int xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id); 106a88394cfSJeff Kirsher static void xircom_remove(struct pci_dev *pdev); 107a88394cfSJeff Kirsher static irqreturn_t xircom_interrupt(int irq, void *dev_instance); 108a88394cfSJeff Kirsher static netdev_tx_t xircom_start_xmit(struct sk_buff *skb, 109a88394cfSJeff Kirsher struct net_device *dev); 110a88394cfSJeff Kirsher static int xircom_open(struct net_device *dev); 111a88394cfSJeff Kirsher static int xircom_close(struct net_device *dev); 112a88394cfSJeff Kirsher static void xircom_up(struct xircom_private *card); 113a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 114a88394cfSJeff Kirsher static void xircom_poll_controller(struct net_device *dev); 115a88394cfSJeff Kirsher #endif 116a88394cfSJeff Kirsher 117a88394cfSJeff Kirsher static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset); 118a88394cfSJeff Kirsher static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset); 119a88394cfSJeff Kirsher static void read_mac_address(struct xircom_private *card); 120a88394cfSJeff Kirsher static void transceiver_voodoo(struct xircom_private *card); 121a88394cfSJeff Kirsher static void initialize_card(struct xircom_private *card); 122a88394cfSJeff Kirsher static void trigger_transmit(struct xircom_private *card); 123a88394cfSJeff Kirsher static void trigger_receive(struct xircom_private *card); 124a88394cfSJeff Kirsher static void setup_descriptors(struct xircom_private *card); 125a88394cfSJeff Kirsher static void remove_descriptors(struct xircom_private *card); 126a88394cfSJeff Kirsher static int link_status_changed(struct xircom_private *card); 127a88394cfSJeff Kirsher static void activate_receiver(struct xircom_private *card); 128a88394cfSJeff Kirsher static void deactivate_receiver(struct xircom_private *card); 129a88394cfSJeff Kirsher static void activate_transmitter(struct xircom_private *card); 130a88394cfSJeff Kirsher static void deactivate_transmitter(struct xircom_private *card); 131a88394cfSJeff Kirsher static void enable_transmit_interrupt(struct xircom_private *card); 132a88394cfSJeff Kirsher static void enable_receive_interrupt(struct xircom_private *card); 133a88394cfSJeff Kirsher static void enable_link_interrupt(struct xircom_private *card); 134a88394cfSJeff Kirsher static void disable_all_interrupts(struct xircom_private *card); 135a88394cfSJeff Kirsher static int link_status(struct xircom_private *card); 136a88394cfSJeff Kirsher 137a88394cfSJeff Kirsher 138a88394cfSJeff Kirsher 139a88394cfSJeff Kirsher static DEFINE_PCI_DEVICE_TABLE(xircom_pci_table) = { 140a88394cfSJeff Kirsher {0x115D, 0x0003, PCI_ANY_ID, PCI_ANY_ID,}, 141a88394cfSJeff Kirsher {0,}, 142a88394cfSJeff Kirsher }; 143a88394cfSJeff Kirsher MODULE_DEVICE_TABLE(pci, xircom_pci_table); 144a88394cfSJeff Kirsher 145a88394cfSJeff Kirsher static struct pci_driver xircom_ops = { 146a88394cfSJeff Kirsher .name = "xircom_cb", 147a88394cfSJeff Kirsher .id_table = xircom_pci_table, 148a88394cfSJeff Kirsher .probe = xircom_probe, 149a88394cfSJeff Kirsher .remove = xircom_remove, 150a88394cfSJeff Kirsher .suspend =NULL, 151a88394cfSJeff Kirsher .resume =NULL 152a88394cfSJeff Kirsher }; 153a88394cfSJeff Kirsher 154a88394cfSJeff Kirsher 155a88394cfSJeff Kirsher #if defined DEBUG && DEBUG > 1 156a88394cfSJeff Kirsher static void print_binary(unsigned int number) 157a88394cfSJeff Kirsher { 158a88394cfSJeff Kirsher int i,i2; 159a88394cfSJeff Kirsher char buffer[64]; 160a88394cfSJeff Kirsher memset(buffer,0,64); 161a88394cfSJeff Kirsher i2=0; 162a88394cfSJeff Kirsher for (i=31;i>=0;i--) { 163a88394cfSJeff Kirsher if (number & (1<<i)) 164a88394cfSJeff Kirsher buffer[i2++]='1'; 165a88394cfSJeff Kirsher else 166a88394cfSJeff Kirsher buffer[i2++]='0'; 167a88394cfSJeff Kirsher if ((i&3)==0) 168a88394cfSJeff Kirsher buffer[i2++]=' '; 169a88394cfSJeff Kirsher } 170a88394cfSJeff Kirsher pr_debug("%s\n",buffer); 171a88394cfSJeff Kirsher } 172a88394cfSJeff Kirsher #endif 173a88394cfSJeff Kirsher 174a88394cfSJeff Kirsher static const struct net_device_ops netdev_ops = { 175a88394cfSJeff Kirsher .ndo_open = xircom_open, 176a88394cfSJeff Kirsher .ndo_stop = xircom_close, 177a88394cfSJeff Kirsher .ndo_start_xmit = xircom_start_xmit, 178a88394cfSJeff Kirsher .ndo_change_mtu = eth_change_mtu, 179a88394cfSJeff Kirsher .ndo_set_mac_address = eth_mac_addr, 180a88394cfSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 181a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 182a88394cfSJeff Kirsher .ndo_poll_controller = xircom_poll_controller, 183a88394cfSJeff Kirsher #endif 184a88394cfSJeff Kirsher }; 185a88394cfSJeff Kirsher 186a88394cfSJeff Kirsher /* xircom_probe is the code that gets called on device insertion. 187a88394cfSJeff Kirsher it sets up the hardware and registers the device to the networklayer. 188a88394cfSJeff Kirsher 189a88394cfSJeff Kirsher TODO: Send 1 or 2 "dummy" packets here as the card seems to discard the 190a88394cfSJeff Kirsher first two packets that get send, and pump hates that. 191a88394cfSJeff Kirsher 192a88394cfSJeff Kirsher */ 193a88394cfSJeff Kirsher static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id) 194a88394cfSJeff Kirsher { 195d59a1881SFrancois Romieu struct device *d = &pdev->dev; 196a88394cfSJeff Kirsher struct net_device *dev = NULL; 197a88394cfSJeff Kirsher struct xircom_private *private; 198a88394cfSJeff Kirsher unsigned long flags; 199a88394cfSJeff Kirsher unsigned short tmp16; 200d59a1881SFrancois Romieu int rc; 201a88394cfSJeff Kirsher 202a88394cfSJeff Kirsher /* First do the PCI initialisation */ 203a88394cfSJeff Kirsher 204d59a1881SFrancois Romieu rc = pci_enable_device(pdev); 205d59a1881SFrancois Romieu if (rc < 0) 206d59a1881SFrancois Romieu goto out; 207a88394cfSJeff Kirsher 208a88394cfSJeff Kirsher /* disable all powermanagement */ 209a88394cfSJeff Kirsher pci_write_config_dword(pdev, PCI_POWERMGMT, 0x0000); 210a88394cfSJeff Kirsher 211a88394cfSJeff Kirsher pci_set_master(pdev); /* Why isn't this done by pci_enable_device ?*/ 212a88394cfSJeff Kirsher 213a88394cfSJeff Kirsher /* clear PCI status, if any */ 214a88394cfSJeff Kirsher pci_read_config_word (pdev,PCI_STATUS, &tmp16); 215a88394cfSJeff Kirsher pci_write_config_word (pdev, PCI_STATUS,tmp16); 216a88394cfSJeff Kirsher 217d59a1881SFrancois Romieu rc = pci_request_regions(pdev, "xircom_cb"); 218d59a1881SFrancois Romieu if (rc < 0) { 219a88394cfSJeff Kirsher pr_err("%s: failed to allocate io-region\n", __func__); 220d59a1881SFrancois Romieu goto err_disable; 221a88394cfSJeff Kirsher } 222a88394cfSJeff Kirsher 223d59a1881SFrancois Romieu rc = -ENOMEM; 224a88394cfSJeff Kirsher /* 225a88394cfSJeff Kirsher Before changing the hardware, allocate the memory. 226a88394cfSJeff Kirsher This way, we can fail gracefully if not enough memory 227a88394cfSJeff Kirsher is available. 228a88394cfSJeff Kirsher */ 229a88394cfSJeff Kirsher dev = alloc_etherdev(sizeof(struct xircom_private)); 23041de8d4cSJoe Perches if (!dev) 231d59a1881SFrancois Romieu goto err_release; 23241de8d4cSJoe Perches 233a88394cfSJeff Kirsher private = netdev_priv(dev); 234a88394cfSJeff Kirsher 235a88394cfSJeff Kirsher /* Allocate the send/receive buffers */ 236d59a1881SFrancois Romieu private->rx_buffer = dma_alloc_coherent(d, 8192, 237d59a1881SFrancois Romieu &private->rx_dma_handle, 238d59a1881SFrancois Romieu GFP_KERNEL); 239a88394cfSJeff Kirsher if (private->rx_buffer == NULL) { 240a88394cfSJeff Kirsher pr_err("%s: no memory for rx buffer\n", __func__); 241a88394cfSJeff Kirsher goto rx_buf_fail; 242a88394cfSJeff Kirsher } 243d59a1881SFrancois Romieu private->tx_buffer = dma_alloc_coherent(d, 8192, 244d59a1881SFrancois Romieu &private->tx_dma_handle, 245d59a1881SFrancois Romieu GFP_KERNEL); 246a88394cfSJeff Kirsher if (private->tx_buffer == NULL) { 247a88394cfSJeff Kirsher pr_err("%s: no memory for tx buffer\n", __func__); 248a88394cfSJeff Kirsher goto tx_buf_fail; 249a88394cfSJeff Kirsher } 250a88394cfSJeff Kirsher 251a88394cfSJeff Kirsher SET_NETDEV_DEV(dev, &pdev->dev); 252a88394cfSJeff Kirsher 253a88394cfSJeff Kirsher 254a88394cfSJeff Kirsher private->dev = dev; 255a88394cfSJeff Kirsher private->pdev = pdev; 256a88394cfSJeff Kirsher private->io_port = pci_resource_start(pdev, 0); 257a88394cfSJeff Kirsher spin_lock_init(&private->lock); 258a88394cfSJeff Kirsher dev->irq = pdev->irq; 259a88394cfSJeff Kirsher dev->base_addr = private->io_port; 260a88394cfSJeff Kirsher 261a88394cfSJeff Kirsher initialize_card(private); 262a88394cfSJeff Kirsher read_mac_address(private); 263a88394cfSJeff Kirsher setup_descriptors(private); 264a88394cfSJeff Kirsher 265a88394cfSJeff Kirsher dev->netdev_ops = &netdev_ops; 266a88394cfSJeff Kirsher pci_set_drvdata(pdev, dev); 267a88394cfSJeff Kirsher 268d59a1881SFrancois Romieu rc = register_netdev(dev); 269d59a1881SFrancois Romieu if (rc < 0) { 270a88394cfSJeff Kirsher pr_err("%s: netdevice registration failed\n", __func__); 271a88394cfSJeff Kirsher goto reg_fail; 272a88394cfSJeff Kirsher } 273a88394cfSJeff Kirsher 274a88394cfSJeff Kirsher netdev_info(dev, "Xircom cardbus revision %i at irq %i\n", 275a88394cfSJeff Kirsher pdev->revision, pdev->irq); 276a88394cfSJeff Kirsher /* start the transmitter to get a heartbeat */ 277a88394cfSJeff Kirsher /* TODO: send 2 dummy packets here */ 278a88394cfSJeff Kirsher transceiver_voodoo(private); 279a88394cfSJeff Kirsher 280a88394cfSJeff Kirsher spin_lock_irqsave(&private->lock,flags); 281a88394cfSJeff Kirsher activate_transmitter(private); 282a88394cfSJeff Kirsher activate_receiver(private); 283a88394cfSJeff Kirsher spin_unlock_irqrestore(&private->lock,flags); 284a88394cfSJeff Kirsher 285a88394cfSJeff Kirsher trigger_receive(private); 286d59a1881SFrancois Romieu out: 287d59a1881SFrancois Romieu return rc; 288a88394cfSJeff Kirsher 289a88394cfSJeff Kirsher reg_fail: 290d59a1881SFrancois Romieu pci_set_drvdata(pdev, NULL); 291d59a1881SFrancois Romieu dma_free_coherent(d, 8192, private->tx_buffer, private->tx_dma_handle); 292a88394cfSJeff Kirsher tx_buf_fail: 293d59a1881SFrancois Romieu dma_free_coherent(d, 8192, private->rx_buffer, private->rx_dma_handle); 294a88394cfSJeff Kirsher rx_buf_fail: 295a88394cfSJeff Kirsher free_netdev(dev); 296d59a1881SFrancois Romieu err_release: 297d59a1881SFrancois Romieu pci_release_regions(pdev); 298d59a1881SFrancois Romieu err_disable: 299d59a1881SFrancois Romieu pci_disable_device(pdev); 300d59a1881SFrancois Romieu goto out; 301a88394cfSJeff Kirsher } 302a88394cfSJeff Kirsher 303a88394cfSJeff Kirsher 304a88394cfSJeff Kirsher /* 305a88394cfSJeff Kirsher xircom_remove is called on module-unload or on device-eject. 306a88394cfSJeff Kirsher it unregisters the irq, io-region and network device. 307a88394cfSJeff Kirsher Interrupts and such are already stopped in the "ifconfig ethX down" 308a88394cfSJeff Kirsher code. 309a88394cfSJeff Kirsher */ 310a88394cfSJeff Kirsher static void __devexit xircom_remove(struct pci_dev *pdev) 311a88394cfSJeff Kirsher { 312a88394cfSJeff Kirsher struct net_device *dev = pci_get_drvdata(pdev); 313a88394cfSJeff Kirsher struct xircom_private *card = netdev_priv(dev); 314d59a1881SFrancois Romieu struct device *d = &pdev->dev; 315a88394cfSJeff Kirsher 316a88394cfSJeff Kirsher unregister_netdev(dev); 317a88394cfSJeff Kirsher pci_set_drvdata(pdev, NULL); 318d59a1881SFrancois Romieu dma_free_coherent(d, 8192, card->tx_buffer, card->tx_dma_handle); 319d59a1881SFrancois Romieu dma_free_coherent(d, 8192, card->rx_buffer, card->rx_dma_handle); 320d59a1881SFrancois Romieu free_netdev(dev); 321d59a1881SFrancois Romieu pci_release_regions(pdev); 322d59a1881SFrancois Romieu pci_disable_device(pdev); 323a88394cfSJeff Kirsher } 324a88394cfSJeff Kirsher 325a88394cfSJeff Kirsher static irqreturn_t xircom_interrupt(int irq, void *dev_instance) 326a88394cfSJeff Kirsher { 327a88394cfSJeff Kirsher struct net_device *dev = (struct net_device *) dev_instance; 328a88394cfSJeff Kirsher struct xircom_private *card = netdev_priv(dev); 329a88394cfSJeff Kirsher unsigned int status; 330a88394cfSJeff Kirsher int i; 331a88394cfSJeff Kirsher 332a88394cfSJeff Kirsher spin_lock(&card->lock); 333a88394cfSJeff Kirsher status = inl(card->io_port+CSR5); 334a88394cfSJeff Kirsher 335a88394cfSJeff Kirsher #if defined DEBUG && DEBUG > 1 336a88394cfSJeff Kirsher print_binary(status); 337a88394cfSJeff Kirsher pr_debug("tx status 0x%08x 0x%08x\n", 338a88394cfSJeff Kirsher card->tx_buffer[0], card->tx_buffer[4]); 339a88394cfSJeff Kirsher pr_debug("rx status 0x%08x 0x%08x\n", 340a88394cfSJeff Kirsher card->rx_buffer[0], card->rx_buffer[4]); 341a88394cfSJeff Kirsher #endif 342a88394cfSJeff Kirsher /* Handle shared irq and hotplug */ 343a88394cfSJeff Kirsher if (status == 0 || status == 0xffffffff) { 344a88394cfSJeff Kirsher spin_unlock(&card->lock); 345a88394cfSJeff Kirsher return IRQ_NONE; 346a88394cfSJeff Kirsher } 347a88394cfSJeff Kirsher 348a88394cfSJeff Kirsher if (link_status_changed(card)) { 349a88394cfSJeff Kirsher int newlink; 350a88394cfSJeff Kirsher netdev_dbg(dev, "Link status has changed\n"); 351a88394cfSJeff Kirsher newlink = link_status(card); 352a88394cfSJeff Kirsher netdev_info(dev, "Link is %d mbit\n", newlink); 353a88394cfSJeff Kirsher if (newlink) 354a88394cfSJeff Kirsher netif_carrier_on(dev); 355a88394cfSJeff Kirsher else 356a88394cfSJeff Kirsher netif_carrier_off(dev); 357a88394cfSJeff Kirsher 358a88394cfSJeff Kirsher } 359a88394cfSJeff Kirsher 360a88394cfSJeff Kirsher /* Clear all remaining interrupts */ 361a88394cfSJeff Kirsher status |= 0xffffffff; /* FIXME: make this clear only the 362a88394cfSJeff Kirsher real existing bits */ 363a88394cfSJeff Kirsher outl(status,card->io_port+CSR5); 364a88394cfSJeff Kirsher 365a88394cfSJeff Kirsher 366a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 367a88394cfSJeff Kirsher investigate_write_descriptor(dev,card,i,bufferoffsets[i]); 368a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 369a88394cfSJeff Kirsher investigate_read_descriptor(dev,card,i,bufferoffsets[i]); 370a88394cfSJeff Kirsher 371a88394cfSJeff Kirsher spin_unlock(&card->lock); 372a88394cfSJeff Kirsher return IRQ_HANDLED; 373a88394cfSJeff Kirsher } 374a88394cfSJeff Kirsher 375a88394cfSJeff Kirsher static netdev_tx_t xircom_start_xmit(struct sk_buff *skb, 376a88394cfSJeff Kirsher struct net_device *dev) 377a88394cfSJeff Kirsher { 378a88394cfSJeff Kirsher struct xircom_private *card; 379a88394cfSJeff Kirsher unsigned long flags; 380a88394cfSJeff Kirsher int nextdescriptor; 381a88394cfSJeff Kirsher int desc; 382a88394cfSJeff Kirsher 383a88394cfSJeff Kirsher card = netdev_priv(dev); 384a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock,flags); 385a88394cfSJeff Kirsher 386a88394cfSJeff Kirsher /* First see if we can free some descriptors */ 387a88394cfSJeff Kirsher for (desc=0;desc<NUMDESCRIPTORS;desc++) 388a88394cfSJeff Kirsher investigate_write_descriptor(dev,card,desc,bufferoffsets[desc]); 389a88394cfSJeff Kirsher 390a88394cfSJeff Kirsher 391a88394cfSJeff Kirsher nextdescriptor = (card->transmit_used +1) % (NUMDESCRIPTORS); 392a88394cfSJeff Kirsher desc = card->transmit_used; 393a88394cfSJeff Kirsher 394a88394cfSJeff Kirsher /* only send the packet if the descriptor is free */ 395a88394cfSJeff Kirsher if (card->tx_buffer[4*desc]==0) { 396a88394cfSJeff Kirsher /* Copy the packet data; zero the memory first as the card 397a88394cfSJeff Kirsher sometimes sends more than you ask it to. */ 398a88394cfSJeff Kirsher 399a88394cfSJeff Kirsher memset(&card->tx_buffer[bufferoffsets[desc]/4],0,1536); 400a88394cfSJeff Kirsher skb_copy_from_linear_data(skb, 401a88394cfSJeff Kirsher &(card->tx_buffer[bufferoffsets[desc] / 4]), 402a88394cfSJeff Kirsher skb->len); 403a88394cfSJeff Kirsher /* FIXME: The specification tells us that the length we send HAS to be a multiple of 404a88394cfSJeff Kirsher 4 bytes. */ 405a88394cfSJeff Kirsher 406a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] = cpu_to_le32(skb->len); 407a88394cfSJeff Kirsher if (desc == NUMDESCRIPTORS - 1) /* bit 25: last descriptor of the ring */ 408a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] |= cpu_to_le32(1<<25); 409a88394cfSJeff Kirsher 410a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] |= cpu_to_le32(0xF0000000); 411a88394cfSJeff Kirsher /* 0xF0... means want interrupts*/ 412a88394cfSJeff Kirsher card->tx_skb[desc] = skb; 413a88394cfSJeff Kirsher 414a88394cfSJeff Kirsher wmb(); 415a88394cfSJeff Kirsher /* This gives the descriptor to the card */ 416a88394cfSJeff Kirsher card->tx_buffer[4*desc] = cpu_to_le32(0x80000000); 417a88394cfSJeff Kirsher trigger_transmit(card); 418a88394cfSJeff Kirsher if (card->tx_buffer[nextdescriptor*4] & cpu_to_le32(0x8000000)) { 419a88394cfSJeff Kirsher /* next descriptor is occupied... */ 420a88394cfSJeff Kirsher netif_stop_queue(dev); 421a88394cfSJeff Kirsher } 422a88394cfSJeff Kirsher card->transmit_used = nextdescriptor; 423a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 424a88394cfSJeff Kirsher return NETDEV_TX_OK; 425a88394cfSJeff Kirsher } 426a88394cfSJeff Kirsher 427a88394cfSJeff Kirsher /* Uh oh... no free descriptor... drop the packet */ 428a88394cfSJeff Kirsher netif_stop_queue(dev); 429a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 430a88394cfSJeff Kirsher trigger_transmit(card); 431a88394cfSJeff Kirsher 432a88394cfSJeff Kirsher return NETDEV_TX_BUSY; 433a88394cfSJeff Kirsher } 434a88394cfSJeff Kirsher 435a88394cfSJeff Kirsher 436a88394cfSJeff Kirsher 437a88394cfSJeff Kirsher 438a88394cfSJeff Kirsher static int xircom_open(struct net_device *dev) 439a88394cfSJeff Kirsher { 440a88394cfSJeff Kirsher struct xircom_private *xp = netdev_priv(dev); 441a88394cfSJeff Kirsher int retval; 442a88394cfSJeff Kirsher 443a88394cfSJeff Kirsher netdev_info(dev, "xircom cardbus adaptor found, using irq %i\n", 444a88394cfSJeff Kirsher dev->irq); 445a88394cfSJeff Kirsher retval = request_irq(dev->irq, xircom_interrupt, IRQF_SHARED, dev->name, dev); 446a88394cfSJeff Kirsher if (retval) 447a88394cfSJeff Kirsher return retval; 448a88394cfSJeff Kirsher 449a88394cfSJeff Kirsher xircom_up(xp); 450a88394cfSJeff Kirsher xp->open = 1; 451a88394cfSJeff Kirsher 452a88394cfSJeff Kirsher return 0; 453a88394cfSJeff Kirsher } 454a88394cfSJeff Kirsher 455a88394cfSJeff Kirsher static int xircom_close(struct net_device *dev) 456a88394cfSJeff Kirsher { 457a88394cfSJeff Kirsher struct xircom_private *card; 458a88394cfSJeff Kirsher unsigned long flags; 459a88394cfSJeff Kirsher 460a88394cfSJeff Kirsher card = netdev_priv(dev); 461a88394cfSJeff Kirsher netif_stop_queue(dev); /* we don't want new packets */ 462a88394cfSJeff Kirsher 463a88394cfSJeff Kirsher 464a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock,flags); 465a88394cfSJeff Kirsher 466a88394cfSJeff Kirsher disable_all_interrupts(card); 467a88394cfSJeff Kirsher #if 0 468a88394cfSJeff Kirsher /* We can enable this again once we send dummy packets on ifconfig ethX up */ 469a88394cfSJeff Kirsher deactivate_receiver(card); 470a88394cfSJeff Kirsher deactivate_transmitter(card); 471a88394cfSJeff Kirsher #endif 472a88394cfSJeff Kirsher remove_descriptors(card); 473a88394cfSJeff Kirsher 474a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 475a88394cfSJeff Kirsher 476a88394cfSJeff Kirsher card->open = 0; 477a88394cfSJeff Kirsher free_irq(dev->irq,dev); 478a88394cfSJeff Kirsher 479a88394cfSJeff Kirsher return 0; 480a88394cfSJeff Kirsher 481a88394cfSJeff Kirsher } 482a88394cfSJeff Kirsher 483a88394cfSJeff Kirsher 484a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 485a88394cfSJeff Kirsher static void xircom_poll_controller(struct net_device *dev) 486a88394cfSJeff Kirsher { 487a88394cfSJeff Kirsher disable_irq(dev->irq); 488a88394cfSJeff Kirsher xircom_interrupt(dev->irq, dev); 489a88394cfSJeff Kirsher enable_irq(dev->irq); 490a88394cfSJeff Kirsher } 491a88394cfSJeff Kirsher #endif 492a88394cfSJeff Kirsher 493a88394cfSJeff Kirsher 494a88394cfSJeff Kirsher static void initialize_card(struct xircom_private *card) 495a88394cfSJeff Kirsher { 496a88394cfSJeff Kirsher unsigned int val; 497a88394cfSJeff Kirsher unsigned long flags; 498a88394cfSJeff Kirsher 499a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 500a88394cfSJeff Kirsher 501a88394cfSJeff Kirsher /* First: reset the card */ 502a88394cfSJeff Kirsher val = inl(card->io_port + CSR0); 503a88394cfSJeff Kirsher val |= 0x01; /* Software reset */ 504a88394cfSJeff Kirsher outl(val, card->io_port + CSR0); 505a88394cfSJeff Kirsher 506a88394cfSJeff Kirsher udelay(100); /* give the card some time to reset */ 507a88394cfSJeff Kirsher 508a88394cfSJeff Kirsher val = inl(card->io_port + CSR0); 509a88394cfSJeff Kirsher val &= ~0x01; /* disable Software reset */ 510a88394cfSJeff Kirsher outl(val, card->io_port + CSR0); 511a88394cfSJeff Kirsher 512a88394cfSJeff Kirsher 513a88394cfSJeff Kirsher val = 0; /* Value 0x00 is a safe and conservative value 514a88394cfSJeff Kirsher for the PCI configuration settings */ 515a88394cfSJeff Kirsher outl(val, card->io_port + CSR0); 516a88394cfSJeff Kirsher 517a88394cfSJeff Kirsher 518a88394cfSJeff Kirsher disable_all_interrupts(card); 519a88394cfSJeff Kirsher deactivate_receiver(card); 520a88394cfSJeff Kirsher deactivate_transmitter(card); 521a88394cfSJeff Kirsher 522a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 523a88394cfSJeff Kirsher } 524a88394cfSJeff Kirsher 525a88394cfSJeff Kirsher /* 526a88394cfSJeff Kirsher trigger_transmit causes the card to check for frames to be transmitted. 527a88394cfSJeff Kirsher This is accomplished by writing to the CSR1 port. The documentation 528a88394cfSJeff Kirsher claims that the act of writing is sufficient and that the value is 529a88394cfSJeff Kirsher ignored; I chose zero. 530a88394cfSJeff Kirsher */ 531a88394cfSJeff Kirsher static void trigger_transmit(struct xircom_private *card) 532a88394cfSJeff Kirsher { 533a88394cfSJeff Kirsher unsigned int val; 534a88394cfSJeff Kirsher 535a88394cfSJeff Kirsher val = 0; 536a88394cfSJeff Kirsher outl(val, card->io_port + CSR1); 537a88394cfSJeff Kirsher } 538a88394cfSJeff Kirsher 539a88394cfSJeff Kirsher /* 540a88394cfSJeff Kirsher trigger_receive causes the card to check for empty frames in the 541a88394cfSJeff Kirsher descriptor list in which packets can be received. 542a88394cfSJeff Kirsher This is accomplished by writing to the CSR2 port. The documentation 543a88394cfSJeff Kirsher claims that the act of writing is sufficient and that the value is 544a88394cfSJeff Kirsher ignored; I chose zero. 545a88394cfSJeff Kirsher */ 546a88394cfSJeff Kirsher static void trigger_receive(struct xircom_private *card) 547a88394cfSJeff Kirsher { 548a88394cfSJeff Kirsher unsigned int val; 549a88394cfSJeff Kirsher 550a88394cfSJeff Kirsher val = 0; 551a88394cfSJeff Kirsher outl(val, card->io_port + CSR2); 552a88394cfSJeff Kirsher } 553a88394cfSJeff Kirsher 554a88394cfSJeff Kirsher /* 555a88394cfSJeff Kirsher setup_descriptors initializes the send and receive buffers to be valid 556a88394cfSJeff Kirsher descriptors and programs the addresses into the card. 557a88394cfSJeff Kirsher */ 558a88394cfSJeff Kirsher static void setup_descriptors(struct xircom_private *card) 559a88394cfSJeff Kirsher { 560a88394cfSJeff Kirsher u32 address; 561a88394cfSJeff Kirsher int i; 562a88394cfSJeff Kirsher 563a88394cfSJeff Kirsher BUG_ON(card->rx_buffer == NULL); 564a88394cfSJeff Kirsher BUG_ON(card->tx_buffer == NULL); 565a88394cfSJeff Kirsher 566a88394cfSJeff Kirsher /* Receive descriptors */ 567a88394cfSJeff Kirsher memset(card->rx_buffer, 0, 128); /* clear the descriptors */ 568a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++ ) { 569a88394cfSJeff Kirsher 570a88394cfSJeff Kirsher /* Rx Descr0: It's empty, let the card own it, no errors -> 0x80000000 */ 571a88394cfSJeff Kirsher card->rx_buffer[i*4 + 0] = cpu_to_le32(0x80000000); 572a88394cfSJeff Kirsher /* Rx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ 573a88394cfSJeff Kirsher card->rx_buffer[i*4 + 1] = cpu_to_le32(1536); 574a88394cfSJeff Kirsher if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */ 575a88394cfSJeff Kirsher card->rx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25); 576a88394cfSJeff Kirsher 577a88394cfSJeff Kirsher /* Rx Descr2: address of the buffer 578a88394cfSJeff Kirsher we store the buffer at the 2nd half of the page */ 579a88394cfSJeff Kirsher 580a88394cfSJeff Kirsher address = card->rx_dma_handle; 581a88394cfSJeff Kirsher card->rx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); 582a88394cfSJeff Kirsher /* Rx Desc3: address of 2nd buffer -> 0 */ 583a88394cfSJeff Kirsher card->rx_buffer[i*4 + 3] = 0; 584a88394cfSJeff Kirsher } 585a88394cfSJeff Kirsher 586a88394cfSJeff Kirsher wmb(); 587a88394cfSJeff Kirsher /* Write the receive descriptor ring address to the card */ 588a88394cfSJeff Kirsher address = card->rx_dma_handle; 589a88394cfSJeff Kirsher outl(address, card->io_port + CSR3); /* Receive descr list address */ 590a88394cfSJeff Kirsher 591a88394cfSJeff Kirsher 592a88394cfSJeff Kirsher /* transmit descriptors */ 593a88394cfSJeff Kirsher memset(card->tx_buffer, 0, 128); /* clear the descriptors */ 594a88394cfSJeff Kirsher 595a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++ ) { 596a88394cfSJeff Kirsher /* Tx Descr0: Empty, we own it, no errors -> 0x00000000 */ 597a88394cfSJeff Kirsher card->tx_buffer[i*4 + 0] = 0x00000000; 598a88394cfSJeff Kirsher /* Tx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ 599a88394cfSJeff Kirsher card->tx_buffer[i*4 + 1] = cpu_to_le32(1536); 600a88394cfSJeff Kirsher if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */ 601a88394cfSJeff Kirsher card->tx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25); 602a88394cfSJeff Kirsher 603a88394cfSJeff Kirsher /* Tx Descr2: address of the buffer 604a88394cfSJeff Kirsher we store the buffer at the 2nd half of the page */ 605a88394cfSJeff Kirsher address = card->tx_dma_handle; 606a88394cfSJeff Kirsher card->tx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); 607a88394cfSJeff Kirsher /* Tx Desc3: address of 2nd buffer -> 0 */ 608a88394cfSJeff Kirsher card->tx_buffer[i*4 + 3] = 0; 609a88394cfSJeff Kirsher } 610a88394cfSJeff Kirsher 611a88394cfSJeff Kirsher wmb(); 612a88394cfSJeff Kirsher /* wite the transmit descriptor ring to the card */ 613a88394cfSJeff Kirsher address = card->tx_dma_handle; 614a88394cfSJeff Kirsher outl(address, card->io_port + CSR4); /* xmit descr list address */ 615a88394cfSJeff Kirsher } 616a88394cfSJeff Kirsher 617a88394cfSJeff Kirsher /* 618a88394cfSJeff Kirsher remove_descriptors informs the card the descriptors are no longer 619a88394cfSJeff Kirsher valid by setting the address in the card to 0x00. 620a88394cfSJeff Kirsher */ 621a88394cfSJeff Kirsher static void remove_descriptors(struct xircom_private *card) 622a88394cfSJeff Kirsher { 623a88394cfSJeff Kirsher unsigned int val; 624a88394cfSJeff Kirsher 625a88394cfSJeff Kirsher val = 0; 626a88394cfSJeff Kirsher outl(val, card->io_port + CSR3); /* Receive descriptor address */ 627a88394cfSJeff Kirsher outl(val, card->io_port + CSR4); /* Send descriptor address */ 628a88394cfSJeff Kirsher } 629a88394cfSJeff Kirsher 630a88394cfSJeff Kirsher /* 631a88394cfSJeff Kirsher link_status_changed returns 1 if the card has indicated that 632a88394cfSJeff Kirsher the link status has changed. The new link status has to be read from CSR12. 633a88394cfSJeff Kirsher 634a88394cfSJeff Kirsher This function also clears the status-bit. 635a88394cfSJeff Kirsher */ 636a88394cfSJeff Kirsher static int link_status_changed(struct xircom_private *card) 637a88394cfSJeff Kirsher { 638a88394cfSJeff Kirsher unsigned int val; 639a88394cfSJeff Kirsher 640a88394cfSJeff Kirsher val = inl(card->io_port + CSR5); /* Status register */ 641a88394cfSJeff Kirsher 642a88394cfSJeff Kirsher if ((val & (1 << 27)) == 0) /* no change */ 643a88394cfSJeff Kirsher return 0; 644a88394cfSJeff Kirsher 645a88394cfSJeff Kirsher /* clear the event by writing a 1 to the bit in the 646a88394cfSJeff Kirsher status register. */ 647a88394cfSJeff Kirsher val = (1 << 27); 648a88394cfSJeff Kirsher outl(val, card->io_port + CSR5); 649a88394cfSJeff Kirsher 650a88394cfSJeff Kirsher return 1; 651a88394cfSJeff Kirsher } 652a88394cfSJeff Kirsher 653a88394cfSJeff Kirsher 654a88394cfSJeff Kirsher /* 655a88394cfSJeff Kirsher transmit_active returns 1 if the transmitter on the card is 656a88394cfSJeff Kirsher in a non-stopped state. 657a88394cfSJeff Kirsher */ 658a88394cfSJeff Kirsher static int transmit_active(struct xircom_private *card) 659a88394cfSJeff Kirsher { 660a88394cfSJeff Kirsher unsigned int val; 661a88394cfSJeff Kirsher 662a88394cfSJeff Kirsher val = inl(card->io_port + CSR5); /* Status register */ 663a88394cfSJeff Kirsher 664a88394cfSJeff Kirsher if ((val & (7 << 20)) == 0) /* transmitter disabled */ 665a88394cfSJeff Kirsher return 0; 666a88394cfSJeff Kirsher 667a88394cfSJeff Kirsher return 1; 668a88394cfSJeff Kirsher } 669a88394cfSJeff Kirsher 670a88394cfSJeff Kirsher /* 671a88394cfSJeff Kirsher receive_active returns 1 if the receiver on the card is 672a88394cfSJeff Kirsher in a non-stopped state. 673a88394cfSJeff Kirsher */ 674a88394cfSJeff Kirsher static int receive_active(struct xircom_private *card) 675a88394cfSJeff Kirsher { 676a88394cfSJeff Kirsher unsigned int val; 677a88394cfSJeff Kirsher 678a88394cfSJeff Kirsher val = inl(card->io_port + CSR5); /* Status register */ 679a88394cfSJeff Kirsher 680a88394cfSJeff Kirsher if ((val & (7 << 17)) == 0) /* receiver disabled */ 681a88394cfSJeff Kirsher return 0; 682a88394cfSJeff Kirsher 683a88394cfSJeff Kirsher return 1; 684a88394cfSJeff Kirsher } 685a88394cfSJeff Kirsher 686a88394cfSJeff Kirsher /* 687a88394cfSJeff Kirsher activate_receiver enables the receiver on the card. 688a88394cfSJeff Kirsher Before being allowed to active the receiver, the receiver 689a88394cfSJeff Kirsher must be completely de-activated. To achieve this, 690a88394cfSJeff Kirsher this code actually disables the receiver first; then it waits for the 691a88394cfSJeff Kirsher receiver to become inactive, then it activates the receiver and then 692a88394cfSJeff Kirsher it waits for the receiver to be active. 693a88394cfSJeff Kirsher 694a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 695a88394cfSJeff Kirsher */ 696a88394cfSJeff Kirsher static void activate_receiver(struct xircom_private *card) 697a88394cfSJeff Kirsher { 698a88394cfSJeff Kirsher unsigned int val; 699a88394cfSJeff Kirsher int counter; 700a88394cfSJeff Kirsher 701a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 702a88394cfSJeff Kirsher 703a88394cfSJeff Kirsher /* If the "active" bit is set and the receiver is already 704a88394cfSJeff Kirsher active, no need to do the expensive thing */ 705a88394cfSJeff Kirsher if ((val&2) && (receive_active(card))) 706a88394cfSJeff Kirsher return; 707a88394cfSJeff Kirsher 708a88394cfSJeff Kirsher 709a88394cfSJeff Kirsher val = val & ~2; /* disable the receiver */ 710a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 711a88394cfSJeff Kirsher 712a88394cfSJeff Kirsher counter = 10; 713a88394cfSJeff Kirsher while (counter > 0) { 714a88394cfSJeff Kirsher if (!receive_active(card)) 715a88394cfSJeff Kirsher break; 716a88394cfSJeff Kirsher /* wait a while */ 717a88394cfSJeff Kirsher udelay(50); 718a88394cfSJeff Kirsher counter--; 719a88394cfSJeff Kirsher if (counter <= 0) 720a88394cfSJeff Kirsher netdev_err(card->dev, "Receiver failed to deactivate\n"); 721a88394cfSJeff Kirsher } 722a88394cfSJeff Kirsher 723a88394cfSJeff Kirsher /* enable the receiver */ 724a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 725a88394cfSJeff Kirsher val = val | 2; /* enable the receiver */ 726a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 727a88394cfSJeff Kirsher 728a88394cfSJeff Kirsher /* now wait for the card to activate again */ 729a88394cfSJeff Kirsher counter = 10; 730a88394cfSJeff Kirsher while (counter > 0) { 731a88394cfSJeff Kirsher if (receive_active(card)) 732a88394cfSJeff Kirsher break; 733a88394cfSJeff Kirsher /* wait a while */ 734a88394cfSJeff Kirsher udelay(50); 735a88394cfSJeff Kirsher counter--; 736a88394cfSJeff Kirsher if (counter <= 0) 737a88394cfSJeff Kirsher netdev_err(card->dev, 738a88394cfSJeff Kirsher "Receiver failed to re-activate\n"); 739a88394cfSJeff Kirsher } 740a88394cfSJeff Kirsher } 741a88394cfSJeff Kirsher 742a88394cfSJeff Kirsher /* 743a88394cfSJeff Kirsher deactivate_receiver disables the receiver on the card. 744a88394cfSJeff Kirsher To achieve this this code disables the receiver first; 745a88394cfSJeff Kirsher then it waits for the receiver to become inactive. 746a88394cfSJeff Kirsher 747a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 748a88394cfSJeff Kirsher */ 749a88394cfSJeff Kirsher static void deactivate_receiver(struct xircom_private *card) 750a88394cfSJeff Kirsher { 751a88394cfSJeff Kirsher unsigned int val; 752a88394cfSJeff Kirsher int counter; 753a88394cfSJeff Kirsher 754a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 755a88394cfSJeff Kirsher val = val & ~2; /* disable the receiver */ 756a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 757a88394cfSJeff Kirsher 758a88394cfSJeff Kirsher counter = 10; 759a88394cfSJeff Kirsher while (counter > 0) { 760a88394cfSJeff Kirsher if (!receive_active(card)) 761a88394cfSJeff Kirsher break; 762a88394cfSJeff Kirsher /* wait a while */ 763a88394cfSJeff Kirsher udelay(50); 764a88394cfSJeff Kirsher counter--; 765a88394cfSJeff Kirsher if (counter <= 0) 766a88394cfSJeff Kirsher netdev_err(card->dev, "Receiver failed to deactivate\n"); 767a88394cfSJeff Kirsher } 768a88394cfSJeff Kirsher } 769a88394cfSJeff Kirsher 770a88394cfSJeff Kirsher 771a88394cfSJeff Kirsher /* 772a88394cfSJeff Kirsher activate_transmitter enables the transmitter on the card. 773a88394cfSJeff Kirsher Before being allowed to active the transmitter, the transmitter 774a88394cfSJeff Kirsher must be completely de-activated. To achieve this, 775a88394cfSJeff Kirsher this code actually disables the transmitter first; then it waits for the 776a88394cfSJeff Kirsher transmitter to become inactive, then it activates the transmitter and then 777a88394cfSJeff Kirsher it waits for the transmitter to be active again. 778a88394cfSJeff Kirsher 779a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 780a88394cfSJeff Kirsher */ 781a88394cfSJeff Kirsher static void activate_transmitter(struct xircom_private *card) 782a88394cfSJeff Kirsher { 783a88394cfSJeff Kirsher unsigned int val; 784a88394cfSJeff Kirsher int counter; 785a88394cfSJeff Kirsher 786a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 787a88394cfSJeff Kirsher 788a88394cfSJeff Kirsher /* If the "active" bit is set and the receiver is already 789a88394cfSJeff Kirsher active, no need to do the expensive thing */ 790a88394cfSJeff Kirsher if ((val&(1<<13)) && (transmit_active(card))) 791a88394cfSJeff Kirsher return; 792a88394cfSJeff Kirsher 793a88394cfSJeff Kirsher val = val & ~(1 << 13); /* disable the transmitter */ 794a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 795a88394cfSJeff Kirsher 796a88394cfSJeff Kirsher counter = 10; 797a88394cfSJeff Kirsher while (counter > 0) { 798a88394cfSJeff Kirsher if (!transmit_active(card)) 799a88394cfSJeff Kirsher break; 800a88394cfSJeff Kirsher /* wait a while */ 801a88394cfSJeff Kirsher udelay(50); 802a88394cfSJeff Kirsher counter--; 803a88394cfSJeff Kirsher if (counter <= 0) 804a88394cfSJeff Kirsher netdev_err(card->dev, 805a88394cfSJeff Kirsher "Transmitter failed to deactivate\n"); 806a88394cfSJeff Kirsher } 807a88394cfSJeff Kirsher 808a88394cfSJeff Kirsher /* enable the transmitter */ 809a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 810a88394cfSJeff Kirsher val = val | (1 << 13); /* enable the transmitter */ 811a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 812a88394cfSJeff Kirsher 813a88394cfSJeff Kirsher /* now wait for the card to activate again */ 814a88394cfSJeff Kirsher counter = 10; 815a88394cfSJeff Kirsher while (counter > 0) { 816a88394cfSJeff Kirsher if (transmit_active(card)) 817a88394cfSJeff Kirsher break; 818a88394cfSJeff Kirsher /* wait a while */ 819a88394cfSJeff Kirsher udelay(50); 820a88394cfSJeff Kirsher counter--; 821a88394cfSJeff Kirsher if (counter <= 0) 822a88394cfSJeff Kirsher netdev_err(card->dev, 823a88394cfSJeff Kirsher "Transmitter failed to re-activate\n"); 824a88394cfSJeff Kirsher } 825a88394cfSJeff Kirsher } 826a88394cfSJeff Kirsher 827a88394cfSJeff Kirsher /* 828a88394cfSJeff Kirsher deactivate_transmitter disables the transmitter on the card. 829a88394cfSJeff Kirsher To achieve this this code disables the transmitter first; 830a88394cfSJeff Kirsher then it waits for the transmitter to become inactive. 831a88394cfSJeff Kirsher 832a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 833a88394cfSJeff Kirsher */ 834a88394cfSJeff Kirsher static void deactivate_transmitter(struct xircom_private *card) 835a88394cfSJeff Kirsher { 836a88394cfSJeff Kirsher unsigned int val; 837a88394cfSJeff Kirsher int counter; 838a88394cfSJeff Kirsher 839a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); /* Operation mode */ 840a88394cfSJeff Kirsher val = val & ~2; /* disable the transmitter */ 841a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 842a88394cfSJeff Kirsher 843a88394cfSJeff Kirsher counter = 20; 844a88394cfSJeff Kirsher while (counter > 0) { 845a88394cfSJeff Kirsher if (!transmit_active(card)) 846a88394cfSJeff Kirsher break; 847a88394cfSJeff Kirsher /* wait a while */ 848a88394cfSJeff Kirsher udelay(50); 849a88394cfSJeff Kirsher counter--; 850a88394cfSJeff Kirsher if (counter <= 0) 851a88394cfSJeff Kirsher netdev_err(card->dev, 852a88394cfSJeff Kirsher "Transmitter failed to deactivate\n"); 853a88394cfSJeff Kirsher } 854a88394cfSJeff Kirsher } 855a88394cfSJeff Kirsher 856a88394cfSJeff Kirsher 857a88394cfSJeff Kirsher /* 858a88394cfSJeff Kirsher enable_transmit_interrupt enables the transmit interrupt 859a88394cfSJeff Kirsher 860a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 861a88394cfSJeff Kirsher */ 862a88394cfSJeff Kirsher static void enable_transmit_interrupt(struct xircom_private *card) 863a88394cfSJeff Kirsher { 864a88394cfSJeff Kirsher unsigned int val; 865a88394cfSJeff Kirsher 866a88394cfSJeff Kirsher val = inl(card->io_port + CSR7); /* Interrupt enable register */ 867a88394cfSJeff Kirsher val |= 1; /* enable the transmit interrupt */ 868a88394cfSJeff Kirsher outl(val, card->io_port + CSR7); 869a88394cfSJeff Kirsher } 870a88394cfSJeff Kirsher 871a88394cfSJeff Kirsher 872a88394cfSJeff Kirsher /* 873a88394cfSJeff Kirsher enable_receive_interrupt enables the receive interrupt 874a88394cfSJeff Kirsher 875a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 876a88394cfSJeff Kirsher */ 877a88394cfSJeff Kirsher static void enable_receive_interrupt(struct xircom_private *card) 878a88394cfSJeff Kirsher { 879a88394cfSJeff Kirsher unsigned int val; 880a88394cfSJeff Kirsher 881a88394cfSJeff Kirsher val = inl(card->io_port + CSR7); /* Interrupt enable register */ 882a88394cfSJeff Kirsher val = val | (1 << 6); /* enable the receive interrupt */ 883a88394cfSJeff Kirsher outl(val, card->io_port + CSR7); 884a88394cfSJeff Kirsher } 885a88394cfSJeff Kirsher 886a88394cfSJeff Kirsher /* 887a88394cfSJeff Kirsher enable_link_interrupt enables the link status change interrupt 888a88394cfSJeff Kirsher 889a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 890a88394cfSJeff Kirsher */ 891a88394cfSJeff Kirsher static void enable_link_interrupt(struct xircom_private *card) 892a88394cfSJeff Kirsher { 893a88394cfSJeff Kirsher unsigned int val; 894a88394cfSJeff Kirsher 895a88394cfSJeff Kirsher val = inl(card->io_port + CSR7); /* Interrupt enable register */ 896a88394cfSJeff Kirsher val = val | (1 << 27); /* enable the link status chage interrupt */ 897a88394cfSJeff Kirsher outl(val, card->io_port + CSR7); 898a88394cfSJeff Kirsher } 899a88394cfSJeff Kirsher 900a88394cfSJeff Kirsher 901a88394cfSJeff Kirsher 902a88394cfSJeff Kirsher /* 903a88394cfSJeff Kirsher disable_all_interrupts disables all interrupts 904a88394cfSJeff Kirsher 905a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 906a88394cfSJeff Kirsher */ 907a88394cfSJeff Kirsher static void disable_all_interrupts(struct xircom_private *card) 908a88394cfSJeff Kirsher { 909a88394cfSJeff Kirsher unsigned int val; 910a88394cfSJeff Kirsher 911a88394cfSJeff Kirsher val = 0; /* disable all interrupts */ 912a88394cfSJeff Kirsher outl(val, card->io_port + CSR7); 913a88394cfSJeff Kirsher } 914a88394cfSJeff Kirsher 915a88394cfSJeff Kirsher /* 916a88394cfSJeff Kirsher enable_common_interrupts enables several weird interrupts 917a88394cfSJeff Kirsher 918a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 919a88394cfSJeff Kirsher */ 920a88394cfSJeff Kirsher static void enable_common_interrupts(struct xircom_private *card) 921a88394cfSJeff Kirsher { 922a88394cfSJeff Kirsher unsigned int val; 923a88394cfSJeff Kirsher 924a88394cfSJeff Kirsher val = inl(card->io_port + CSR7); /* Interrupt enable register */ 925a88394cfSJeff Kirsher val |= (1<<16); /* Normal Interrupt Summary */ 926a88394cfSJeff Kirsher val |= (1<<15); /* Abnormal Interrupt Summary */ 927a88394cfSJeff Kirsher val |= (1<<13); /* Fatal bus error */ 928a88394cfSJeff Kirsher val |= (1<<8); /* Receive Process Stopped */ 929a88394cfSJeff Kirsher val |= (1<<7); /* Receive Buffer Unavailable */ 930a88394cfSJeff Kirsher val |= (1<<5); /* Transmit Underflow */ 931a88394cfSJeff Kirsher val |= (1<<2); /* Transmit Buffer Unavailable */ 932a88394cfSJeff Kirsher val |= (1<<1); /* Transmit Process Stopped */ 933a88394cfSJeff Kirsher outl(val, card->io_port + CSR7); 934a88394cfSJeff Kirsher } 935a88394cfSJeff Kirsher 936a88394cfSJeff Kirsher /* 937a88394cfSJeff Kirsher enable_promisc starts promisc mode 938a88394cfSJeff Kirsher 939a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 940a88394cfSJeff Kirsher */ 941a88394cfSJeff Kirsher static int enable_promisc(struct xircom_private *card) 942a88394cfSJeff Kirsher { 943a88394cfSJeff Kirsher unsigned int val; 944a88394cfSJeff Kirsher 945a88394cfSJeff Kirsher val = inl(card->io_port + CSR6); 946a88394cfSJeff Kirsher val = val | (1 << 6); 947a88394cfSJeff Kirsher outl(val, card->io_port + CSR6); 948a88394cfSJeff Kirsher 949a88394cfSJeff Kirsher return 1; 950a88394cfSJeff Kirsher } 951a88394cfSJeff Kirsher 952a88394cfSJeff Kirsher 953a88394cfSJeff Kirsher 954a88394cfSJeff Kirsher 955a88394cfSJeff Kirsher /* 956a88394cfSJeff Kirsher link_status() checks the links status and will return 0 for no link, 10 for 10mbit link and 100 for.. guess what. 957a88394cfSJeff Kirsher 958a88394cfSJeff Kirsher Must be called in locked state with interrupts disabled 959a88394cfSJeff Kirsher */ 960a88394cfSJeff Kirsher static int link_status(struct xircom_private *card) 961a88394cfSJeff Kirsher { 962a88394cfSJeff Kirsher unsigned int val; 963a88394cfSJeff Kirsher 964a88394cfSJeff Kirsher val = inb(card->io_port + CSR12); 965a88394cfSJeff Kirsher 966a88394cfSJeff Kirsher if (!(val&(1<<2))) /* bit 2 is 0 for 10mbit link, 1 for not an 10mbit link */ 967a88394cfSJeff Kirsher return 10; 968a88394cfSJeff Kirsher if (!(val&(1<<1))) /* bit 1 is 0 for 100mbit link, 1 for not an 100mbit link */ 969a88394cfSJeff Kirsher return 100; 970a88394cfSJeff Kirsher 971a88394cfSJeff Kirsher /* If we get here -> no link at all */ 972a88394cfSJeff Kirsher 973a88394cfSJeff Kirsher return 0; 974a88394cfSJeff Kirsher } 975a88394cfSJeff Kirsher 976a88394cfSJeff Kirsher 977a88394cfSJeff Kirsher 978a88394cfSJeff Kirsher 979a88394cfSJeff Kirsher 980a88394cfSJeff Kirsher /* 981a88394cfSJeff Kirsher read_mac_address() reads the MAC address from the NIC and stores it in the "dev" structure. 982a88394cfSJeff Kirsher 983a88394cfSJeff Kirsher This function will take the spinlock itself and can, as a result, not be called with the lock helt. 984a88394cfSJeff Kirsher */ 985a88394cfSJeff Kirsher static void read_mac_address(struct xircom_private *card) 986a88394cfSJeff Kirsher { 987a88394cfSJeff Kirsher unsigned char j, tuple, link, data_id, data_count; 988a88394cfSJeff Kirsher unsigned long flags; 989a88394cfSJeff Kirsher int i; 990a88394cfSJeff Kirsher 991a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 992a88394cfSJeff Kirsher 993a88394cfSJeff Kirsher outl(1 << 12, card->io_port + CSR9); /* enable boot rom access */ 994a88394cfSJeff Kirsher for (i = 0x100; i < 0x1f7; i += link + 2) { 995a88394cfSJeff Kirsher outl(i, card->io_port + CSR10); 996a88394cfSJeff Kirsher tuple = inl(card->io_port + CSR9) & 0xff; 997a88394cfSJeff Kirsher outl(i + 1, card->io_port + CSR10); 998a88394cfSJeff Kirsher link = inl(card->io_port + CSR9) & 0xff; 999a88394cfSJeff Kirsher outl(i + 2, card->io_port + CSR10); 1000a88394cfSJeff Kirsher data_id = inl(card->io_port + CSR9) & 0xff; 1001a88394cfSJeff Kirsher outl(i + 3, card->io_port + CSR10); 1002a88394cfSJeff Kirsher data_count = inl(card->io_port + CSR9) & 0xff; 1003a88394cfSJeff Kirsher if ((tuple == 0x22) && (data_id == 0x04) && (data_count == 0x06)) { 1004a88394cfSJeff Kirsher /* 1005a88394cfSJeff Kirsher * This is it. We have the data we want. 1006a88394cfSJeff Kirsher */ 1007a88394cfSJeff Kirsher for (j = 0; j < 6; j++) { 1008a88394cfSJeff Kirsher outl(i + j + 4, card->io_port + CSR10); 1009a88394cfSJeff Kirsher card->dev->dev_addr[j] = inl(card->io_port + CSR9) & 0xff; 1010a88394cfSJeff Kirsher } 1011a88394cfSJeff Kirsher break; 1012a88394cfSJeff Kirsher } else if (link == 0) { 1013a88394cfSJeff Kirsher break; 1014a88394cfSJeff Kirsher } 1015a88394cfSJeff Kirsher } 1016a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1017a88394cfSJeff Kirsher pr_debug(" %pM\n", card->dev->dev_addr); 1018a88394cfSJeff Kirsher } 1019a88394cfSJeff Kirsher 1020a88394cfSJeff Kirsher 1021a88394cfSJeff Kirsher /* 1022a88394cfSJeff Kirsher transceiver_voodoo() enables the external UTP plug thingy. 1023a88394cfSJeff Kirsher it's called voodoo as I stole this code and cannot cross-reference 1024a88394cfSJeff Kirsher it with the specification. 1025a88394cfSJeff Kirsher */ 1026a88394cfSJeff Kirsher static void transceiver_voodoo(struct xircom_private *card) 1027a88394cfSJeff Kirsher { 1028a88394cfSJeff Kirsher unsigned long flags; 1029a88394cfSJeff Kirsher 1030a88394cfSJeff Kirsher /* disable all powermanagement */ 1031a88394cfSJeff Kirsher pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); 1032a88394cfSJeff Kirsher 1033a88394cfSJeff Kirsher setup_descriptors(card); 1034a88394cfSJeff Kirsher 1035a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 1036a88394cfSJeff Kirsher 1037a88394cfSJeff Kirsher outl(0x0008, card->io_port + CSR15); 1038a88394cfSJeff Kirsher udelay(25); 1039a88394cfSJeff Kirsher outl(0xa8050000, card->io_port + CSR15); 1040a88394cfSJeff Kirsher udelay(25); 1041a88394cfSJeff Kirsher outl(0xa00f0000, card->io_port + CSR15); 1042a88394cfSJeff Kirsher udelay(25); 1043a88394cfSJeff Kirsher 1044a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1045a88394cfSJeff Kirsher 1046a88394cfSJeff Kirsher netif_start_queue(card->dev); 1047a88394cfSJeff Kirsher } 1048a88394cfSJeff Kirsher 1049a88394cfSJeff Kirsher 1050a88394cfSJeff Kirsher static void xircom_up(struct xircom_private *card) 1051a88394cfSJeff Kirsher { 1052a88394cfSJeff Kirsher unsigned long flags; 1053a88394cfSJeff Kirsher int i; 1054a88394cfSJeff Kirsher 1055a88394cfSJeff Kirsher /* disable all powermanagement */ 1056a88394cfSJeff Kirsher pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); 1057a88394cfSJeff Kirsher 1058a88394cfSJeff Kirsher setup_descriptors(card); 1059a88394cfSJeff Kirsher 1060a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 1061a88394cfSJeff Kirsher 1062a88394cfSJeff Kirsher 1063a88394cfSJeff Kirsher enable_link_interrupt(card); 1064a88394cfSJeff Kirsher enable_transmit_interrupt(card); 1065a88394cfSJeff Kirsher enable_receive_interrupt(card); 1066a88394cfSJeff Kirsher enable_common_interrupts(card); 1067a88394cfSJeff Kirsher enable_promisc(card); 1068a88394cfSJeff Kirsher 1069a88394cfSJeff Kirsher /* The card can have received packets already, read them away now */ 1070a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 1071a88394cfSJeff Kirsher investigate_read_descriptor(card->dev,card,i,bufferoffsets[i]); 1072a88394cfSJeff Kirsher 1073a88394cfSJeff Kirsher 1074a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1075a88394cfSJeff Kirsher trigger_receive(card); 1076a88394cfSJeff Kirsher trigger_transmit(card); 1077a88394cfSJeff Kirsher netif_start_queue(card->dev); 1078a88394cfSJeff Kirsher } 1079a88394cfSJeff Kirsher 1080a88394cfSJeff Kirsher /* Bufferoffset is in BYTES */ 1081a88394cfSJeff Kirsher static void 1082a88394cfSJeff Kirsher investigate_read_descriptor(struct net_device *dev, struct xircom_private *card, 1083a88394cfSJeff Kirsher int descnr, unsigned int bufferoffset) 1084a88394cfSJeff Kirsher { 1085a88394cfSJeff Kirsher int status; 1086a88394cfSJeff Kirsher 1087a88394cfSJeff Kirsher status = le32_to_cpu(card->rx_buffer[4*descnr]); 1088a88394cfSJeff Kirsher 1089a88394cfSJeff Kirsher if (status > 0) { /* packet received */ 1090a88394cfSJeff Kirsher 1091a88394cfSJeff Kirsher /* TODO: discard error packets */ 1092a88394cfSJeff Kirsher 1093a88394cfSJeff Kirsher short pkt_len = ((status >> 16) & 0x7ff) - 4; 1094a88394cfSJeff Kirsher /* minus 4, we don't want the CRC */ 1095a88394cfSJeff Kirsher struct sk_buff *skb; 1096a88394cfSJeff Kirsher 1097a88394cfSJeff Kirsher if (pkt_len > 1518) { 1098a88394cfSJeff Kirsher netdev_err(dev, "Packet length %i is bogus\n", pkt_len); 1099a88394cfSJeff Kirsher pkt_len = 1518; 1100a88394cfSJeff Kirsher } 1101a88394cfSJeff Kirsher 110221a4e469SPradeep A Dalvi skb = netdev_alloc_skb(dev, pkt_len + 2); 1103a88394cfSJeff Kirsher if (skb == NULL) { 1104a88394cfSJeff Kirsher dev->stats.rx_dropped++; 1105a88394cfSJeff Kirsher goto out; 1106a88394cfSJeff Kirsher } 1107a88394cfSJeff Kirsher skb_reserve(skb, 2); 1108a88394cfSJeff Kirsher skb_copy_to_linear_data(skb, 1109a88394cfSJeff Kirsher &card->rx_buffer[bufferoffset / 4], 1110a88394cfSJeff Kirsher pkt_len); 1111a88394cfSJeff Kirsher skb_put(skb, pkt_len); 1112a88394cfSJeff Kirsher skb->protocol = eth_type_trans(skb, dev); 1113a88394cfSJeff Kirsher netif_rx(skb); 1114a88394cfSJeff Kirsher dev->stats.rx_packets++; 1115a88394cfSJeff Kirsher dev->stats.rx_bytes += pkt_len; 1116a88394cfSJeff Kirsher 1117a88394cfSJeff Kirsher out: 1118a88394cfSJeff Kirsher /* give the buffer back to the card */ 1119a88394cfSJeff Kirsher card->rx_buffer[4*descnr] = cpu_to_le32(0x80000000); 1120a88394cfSJeff Kirsher trigger_receive(card); 1121a88394cfSJeff Kirsher } 1122a88394cfSJeff Kirsher } 1123a88394cfSJeff Kirsher 1124a88394cfSJeff Kirsher 1125a88394cfSJeff Kirsher /* Bufferoffset is in BYTES */ 1126a88394cfSJeff Kirsher static void 1127a88394cfSJeff Kirsher investigate_write_descriptor(struct net_device *dev, 1128a88394cfSJeff Kirsher struct xircom_private *card, 1129a88394cfSJeff Kirsher int descnr, unsigned int bufferoffset) 1130a88394cfSJeff Kirsher { 1131a88394cfSJeff Kirsher int status; 1132a88394cfSJeff Kirsher 1133a88394cfSJeff Kirsher status = le32_to_cpu(card->tx_buffer[4*descnr]); 1134a88394cfSJeff Kirsher #if 0 1135a88394cfSJeff Kirsher if (status & 0x8000) { /* Major error */ 1136a88394cfSJeff Kirsher pr_err("Major transmit error status %x\n", status); 1137a88394cfSJeff Kirsher card->tx_buffer[4*descnr] = 0; 1138a88394cfSJeff Kirsher netif_wake_queue (dev); 1139a88394cfSJeff Kirsher } 1140a88394cfSJeff Kirsher #endif 1141a88394cfSJeff Kirsher if (status > 0) { /* bit 31 is 0 when done */ 1142a88394cfSJeff Kirsher if (card->tx_skb[descnr]!=NULL) { 1143a88394cfSJeff Kirsher dev->stats.tx_bytes += card->tx_skb[descnr]->len; 1144a88394cfSJeff Kirsher dev_kfree_skb_irq(card->tx_skb[descnr]); 1145a88394cfSJeff Kirsher } 1146a88394cfSJeff Kirsher card->tx_skb[descnr] = NULL; 1147a88394cfSJeff Kirsher /* Bit 8 in the status field is 1 if there was a collision */ 1148a88394cfSJeff Kirsher if (status & (1 << 8)) 1149a88394cfSJeff Kirsher dev->stats.collisions++; 1150a88394cfSJeff Kirsher card->tx_buffer[4*descnr] = 0; /* descriptor is free again */ 1151a88394cfSJeff Kirsher netif_wake_queue (dev); 1152a88394cfSJeff Kirsher dev->stats.tx_packets++; 1153a88394cfSJeff Kirsher } 1154a88394cfSJeff Kirsher } 1155a88394cfSJeff Kirsher 1156a88394cfSJeff Kirsher static int __init xircom_init(void) 1157a88394cfSJeff Kirsher { 1158a88394cfSJeff Kirsher return pci_register_driver(&xircom_ops); 1159a88394cfSJeff Kirsher } 1160a88394cfSJeff Kirsher 1161a88394cfSJeff Kirsher static void __exit xircom_exit(void) 1162a88394cfSJeff Kirsher { 1163a88394cfSJeff Kirsher pci_unregister_driver(&xircom_ops); 1164a88394cfSJeff Kirsher } 1165a88394cfSJeff Kirsher 1166a88394cfSJeff Kirsher module_init(xircom_init) 1167a88394cfSJeff Kirsher module_exit(xircom_exit) 1168a88394cfSJeff Kirsher 1169