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/bitops.h> 32a88394cfSJeff Kirsher 33a88394cfSJeff Kirsher #include <asm/uaccess.h> 34a88394cfSJeff Kirsher #include <asm/io.h> 35a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 36a88394cfSJeff Kirsher #include <asm/irq.h> 37a88394cfSJeff Kirsher #endif 38a88394cfSJeff Kirsher 39a88394cfSJeff Kirsher MODULE_DESCRIPTION("Xircom Cardbus ethernet driver"); 40a88394cfSJeff Kirsher MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>"); 41a88394cfSJeff Kirsher MODULE_LICENSE("GPL"); 42a88394cfSJeff Kirsher 43ebaf7f8fSFrancois Romieu #define xw32(reg, val) iowrite32(val, ioaddr + (reg)) 44ebaf7f8fSFrancois Romieu #define xr32(reg) ioread32(ioaddr + (reg)) 45ebaf7f8fSFrancois Romieu #define xr8(reg) ioread8(ioaddr + (reg)) 46a88394cfSJeff Kirsher 47a88394cfSJeff Kirsher /* IO registers on the card, offsets */ 48a88394cfSJeff Kirsher #define CSR0 0x00 49a88394cfSJeff Kirsher #define CSR1 0x08 50a88394cfSJeff Kirsher #define CSR2 0x10 51a88394cfSJeff Kirsher #define CSR3 0x18 52a88394cfSJeff Kirsher #define CSR4 0x20 53a88394cfSJeff Kirsher #define CSR5 0x28 54a88394cfSJeff Kirsher #define CSR6 0x30 55a88394cfSJeff Kirsher #define CSR7 0x38 56a88394cfSJeff Kirsher #define CSR8 0x40 57a88394cfSJeff Kirsher #define CSR9 0x48 58a88394cfSJeff Kirsher #define CSR10 0x50 59a88394cfSJeff Kirsher #define CSR11 0x58 60a88394cfSJeff Kirsher #define CSR12 0x60 61a88394cfSJeff Kirsher #define CSR13 0x68 62a88394cfSJeff Kirsher #define CSR14 0x70 63a88394cfSJeff Kirsher #define CSR15 0x78 64a88394cfSJeff Kirsher #define CSR16 0x80 65a88394cfSJeff Kirsher 66a88394cfSJeff Kirsher /* PCI registers */ 67a88394cfSJeff Kirsher #define PCI_POWERMGMT 0x40 68a88394cfSJeff Kirsher 69a88394cfSJeff Kirsher /* Offsets of the buffers within the descriptor pages, in bytes */ 70a88394cfSJeff Kirsher 71a88394cfSJeff Kirsher #define NUMDESCRIPTORS 4 72a88394cfSJeff Kirsher 73a88394cfSJeff Kirsher static int bufferoffsets[NUMDESCRIPTORS] = {128,2048,4096,6144}; 74a88394cfSJeff Kirsher 75a88394cfSJeff Kirsher 76a88394cfSJeff Kirsher struct xircom_private { 77a88394cfSJeff Kirsher /* Send and receive buffers, kernel-addressable and dma addressable forms */ 78a88394cfSJeff Kirsher 79a88394cfSJeff Kirsher __le32 *rx_buffer; 80a88394cfSJeff Kirsher __le32 *tx_buffer; 81a88394cfSJeff Kirsher 82a88394cfSJeff Kirsher dma_addr_t rx_dma_handle; 83a88394cfSJeff Kirsher dma_addr_t tx_dma_handle; 84a88394cfSJeff Kirsher 85a88394cfSJeff Kirsher struct sk_buff *tx_skb[4]; 86a88394cfSJeff Kirsher 87ebaf7f8fSFrancois Romieu void __iomem *ioaddr; 88a88394cfSJeff Kirsher int open; 89a88394cfSJeff Kirsher 90a88394cfSJeff Kirsher /* transmit_used is the rotating counter that indicates which transmit 91a88394cfSJeff Kirsher descriptor has to be used next */ 92a88394cfSJeff Kirsher int transmit_used; 93a88394cfSJeff Kirsher 94a88394cfSJeff Kirsher /* Spinlock to serialize register operations. 95a88394cfSJeff Kirsher It must be helt while manipulating the following registers: 96a88394cfSJeff Kirsher CSR0, CSR6, CSR7, CSR9, CSR10, CSR15 97a88394cfSJeff Kirsher */ 98a88394cfSJeff Kirsher spinlock_t lock; 99a88394cfSJeff Kirsher 100a88394cfSJeff Kirsher struct pci_dev *pdev; 101a88394cfSJeff Kirsher struct net_device *dev; 102a88394cfSJeff Kirsher }; 103a88394cfSJeff Kirsher 104a88394cfSJeff Kirsher 105a88394cfSJeff Kirsher /* Function prototypes */ 106a88394cfSJeff Kirsher static int xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id); 107a88394cfSJeff Kirsher static void xircom_remove(struct pci_dev *pdev); 108a88394cfSJeff Kirsher static irqreturn_t xircom_interrupt(int irq, void *dev_instance); 109a88394cfSJeff Kirsher static netdev_tx_t xircom_start_xmit(struct sk_buff *skb, 110a88394cfSJeff Kirsher struct net_device *dev); 111a88394cfSJeff Kirsher static int xircom_open(struct net_device *dev); 112a88394cfSJeff Kirsher static int xircom_close(struct net_device *dev); 113a88394cfSJeff Kirsher static void xircom_up(struct xircom_private *card); 114a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 115a88394cfSJeff Kirsher static void xircom_poll_controller(struct net_device *dev); 116a88394cfSJeff Kirsher #endif 117a88394cfSJeff Kirsher 118a88394cfSJeff Kirsher static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset); 119a88394cfSJeff Kirsher static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset); 120a88394cfSJeff Kirsher static void read_mac_address(struct xircom_private *card); 121a88394cfSJeff Kirsher static void transceiver_voodoo(struct xircom_private *card); 122a88394cfSJeff Kirsher static void initialize_card(struct xircom_private *card); 123a88394cfSJeff Kirsher static void trigger_transmit(struct xircom_private *card); 124a88394cfSJeff Kirsher static void trigger_receive(struct xircom_private *card); 125a88394cfSJeff Kirsher static void setup_descriptors(struct xircom_private *card); 126a88394cfSJeff Kirsher static void remove_descriptors(struct xircom_private *card); 127a88394cfSJeff Kirsher static int link_status_changed(struct xircom_private *card); 128a88394cfSJeff Kirsher static void activate_receiver(struct xircom_private *card); 129a88394cfSJeff Kirsher static void deactivate_receiver(struct xircom_private *card); 130a88394cfSJeff Kirsher static void activate_transmitter(struct xircom_private *card); 131a88394cfSJeff Kirsher static void deactivate_transmitter(struct xircom_private *card); 132a88394cfSJeff Kirsher static void enable_transmit_interrupt(struct xircom_private *card); 133a88394cfSJeff Kirsher static void enable_receive_interrupt(struct xircom_private *card); 134a88394cfSJeff Kirsher static void enable_link_interrupt(struct xircom_private *card); 135a88394cfSJeff Kirsher static void disable_all_interrupts(struct xircom_private *card); 136a88394cfSJeff Kirsher static int link_status(struct xircom_private *card); 137a88394cfSJeff Kirsher 138a88394cfSJeff Kirsher 139a88394cfSJeff Kirsher 1409baa3c34SBenoit Taine static const struct pci_device_id xircom_pci_table[] = { 141ebaf7f8fSFrancois Romieu { PCI_VDEVICE(XIRCOM, 0x0003), }, 142a88394cfSJeff Kirsher {0,}, 143a88394cfSJeff Kirsher }; 144a88394cfSJeff Kirsher MODULE_DEVICE_TABLE(pci, xircom_pci_table); 145a88394cfSJeff Kirsher 146a88394cfSJeff Kirsher static struct pci_driver xircom_ops = { 147a88394cfSJeff Kirsher .name = "xircom_cb", 148a88394cfSJeff Kirsher .id_table = xircom_pci_table, 149a88394cfSJeff Kirsher .probe = xircom_probe, 150779c1a85SBill Pemberton .remove = xircom_remove, 151a88394cfSJeff Kirsher }; 152a88394cfSJeff Kirsher 153a88394cfSJeff Kirsher 154a88394cfSJeff Kirsher #if defined DEBUG && DEBUG > 1 155a88394cfSJeff Kirsher static void print_binary(unsigned int number) 156a88394cfSJeff Kirsher { 157a88394cfSJeff Kirsher int i,i2; 158a88394cfSJeff Kirsher char buffer[64]; 159a88394cfSJeff Kirsher memset(buffer,0,64); 160a88394cfSJeff Kirsher i2=0; 161a88394cfSJeff Kirsher for (i=31;i>=0;i--) { 162a88394cfSJeff Kirsher if (number & (1<<i)) 163a88394cfSJeff Kirsher buffer[i2++]='1'; 164a88394cfSJeff Kirsher else 165a88394cfSJeff Kirsher buffer[i2++]='0'; 166a88394cfSJeff Kirsher if ((i&3)==0) 167a88394cfSJeff Kirsher buffer[i2++]=' '; 168a88394cfSJeff Kirsher } 169a88394cfSJeff Kirsher pr_debug("%s\n",buffer); 170a88394cfSJeff Kirsher } 171a88394cfSJeff Kirsher #endif 172a88394cfSJeff Kirsher 173a88394cfSJeff Kirsher static const struct net_device_ops netdev_ops = { 174a88394cfSJeff Kirsher .ndo_open = xircom_open, 175a88394cfSJeff Kirsher .ndo_stop = xircom_close, 176a88394cfSJeff Kirsher .ndo_start_xmit = xircom_start_xmit, 177a88394cfSJeff Kirsher .ndo_change_mtu = eth_change_mtu, 178a88394cfSJeff Kirsher .ndo_set_mac_address = eth_mac_addr, 179a88394cfSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 180a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 181a88394cfSJeff Kirsher .ndo_poll_controller = xircom_poll_controller, 182a88394cfSJeff Kirsher #endif 183a88394cfSJeff Kirsher }; 184a88394cfSJeff Kirsher 185a88394cfSJeff Kirsher /* xircom_probe is the code that gets called on device insertion. 186a88394cfSJeff Kirsher it sets up the hardware and registers the device to the networklayer. 187a88394cfSJeff Kirsher 188a88394cfSJeff Kirsher TODO: Send 1 or 2 "dummy" packets here as the card seems to discard the 189a88394cfSJeff Kirsher first two packets that get send, and pump hates that. 190a88394cfSJeff Kirsher 191a88394cfSJeff Kirsher */ 192779c1a85SBill Pemberton static int xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id) 193a88394cfSJeff Kirsher { 194d59a1881SFrancois Romieu struct device *d = &pdev->dev; 195a88394cfSJeff Kirsher struct net_device *dev = NULL; 196a88394cfSJeff Kirsher struct xircom_private *private; 197a88394cfSJeff Kirsher unsigned long flags; 198a88394cfSJeff Kirsher unsigned short tmp16; 199d59a1881SFrancois Romieu int rc; 200a88394cfSJeff Kirsher 201a88394cfSJeff Kirsher /* First do the PCI initialisation */ 202a88394cfSJeff Kirsher 203d59a1881SFrancois Romieu rc = pci_enable_device(pdev); 204d59a1881SFrancois Romieu if (rc < 0) 205d59a1881SFrancois Romieu goto out; 206a88394cfSJeff Kirsher 207a88394cfSJeff Kirsher /* disable all powermanagement */ 208a88394cfSJeff Kirsher pci_write_config_dword(pdev, PCI_POWERMGMT, 0x0000); 209a88394cfSJeff Kirsher 210a88394cfSJeff Kirsher pci_set_master(pdev); /* Why isn't this done by pci_enable_device ?*/ 211a88394cfSJeff Kirsher 212a88394cfSJeff Kirsher /* clear PCI status, if any */ 213a88394cfSJeff Kirsher pci_read_config_word (pdev,PCI_STATUS, &tmp16); 214a88394cfSJeff Kirsher pci_write_config_word (pdev, PCI_STATUS,tmp16); 215a88394cfSJeff Kirsher 216d59a1881SFrancois Romieu rc = pci_request_regions(pdev, "xircom_cb"); 217d59a1881SFrancois Romieu if (rc < 0) { 218a88394cfSJeff Kirsher pr_err("%s: failed to allocate io-region\n", __func__); 219d59a1881SFrancois Romieu goto err_disable; 220a88394cfSJeff Kirsher } 221a88394cfSJeff Kirsher 222d59a1881SFrancois Romieu rc = -ENOMEM; 223a88394cfSJeff Kirsher /* 224a88394cfSJeff Kirsher Before changing the hardware, allocate the memory. 225a88394cfSJeff Kirsher This way, we can fail gracefully if not enough memory 226a88394cfSJeff Kirsher is available. 227a88394cfSJeff Kirsher */ 228a88394cfSJeff Kirsher dev = alloc_etherdev(sizeof(struct xircom_private)); 22941de8d4cSJoe Perches if (!dev) 230d59a1881SFrancois Romieu goto err_release; 23141de8d4cSJoe Perches 232a88394cfSJeff Kirsher private = netdev_priv(dev); 233a88394cfSJeff Kirsher 234a88394cfSJeff Kirsher /* Allocate the send/receive buffers */ 235d59a1881SFrancois Romieu private->rx_buffer = dma_alloc_coherent(d, 8192, 236d59a1881SFrancois Romieu &private->rx_dma_handle, 237d59a1881SFrancois Romieu GFP_KERNEL); 238d0320f75SJoe Perches if (private->rx_buffer == NULL) 239a88394cfSJeff Kirsher goto rx_buf_fail; 240d0320f75SJoe Perches 241d59a1881SFrancois Romieu private->tx_buffer = dma_alloc_coherent(d, 8192, 242d59a1881SFrancois Romieu &private->tx_dma_handle, 243d59a1881SFrancois Romieu GFP_KERNEL); 244d0320f75SJoe Perches if (private->tx_buffer == NULL) 245a88394cfSJeff Kirsher goto tx_buf_fail; 246a88394cfSJeff Kirsher 247a88394cfSJeff Kirsher SET_NETDEV_DEV(dev, &pdev->dev); 248a88394cfSJeff Kirsher 249a88394cfSJeff Kirsher 250a88394cfSJeff Kirsher private->dev = dev; 251a88394cfSJeff Kirsher private->pdev = pdev; 252ebaf7f8fSFrancois Romieu 253ebaf7f8fSFrancois Romieu /* IO range. */ 254ebaf7f8fSFrancois Romieu private->ioaddr = pci_iomap(pdev, 0, 0); 255ebaf7f8fSFrancois Romieu if (!private->ioaddr) 256ebaf7f8fSFrancois Romieu goto reg_fail; 257ebaf7f8fSFrancois Romieu 258a88394cfSJeff Kirsher spin_lock_init(&private->lock); 259a88394cfSJeff Kirsher 260a88394cfSJeff Kirsher initialize_card(private); 261a88394cfSJeff Kirsher read_mac_address(private); 262a88394cfSJeff Kirsher setup_descriptors(private); 263a88394cfSJeff Kirsher 264a88394cfSJeff Kirsher dev->netdev_ops = &netdev_ops; 265a88394cfSJeff Kirsher pci_set_drvdata(pdev, dev); 266a88394cfSJeff Kirsher 267d59a1881SFrancois Romieu rc = register_netdev(dev); 268d59a1881SFrancois Romieu if (rc < 0) { 269a88394cfSJeff Kirsher pr_err("%s: netdevice registration failed\n", __func__); 270ebaf7f8fSFrancois Romieu goto err_unmap; 271a88394cfSJeff Kirsher } 272a88394cfSJeff Kirsher 273a88394cfSJeff Kirsher netdev_info(dev, "Xircom cardbus revision %i at irq %i\n", 274a88394cfSJeff Kirsher pdev->revision, pdev->irq); 275a88394cfSJeff Kirsher /* start the transmitter to get a heartbeat */ 276a88394cfSJeff Kirsher /* TODO: send 2 dummy packets here */ 277a88394cfSJeff Kirsher transceiver_voodoo(private); 278a88394cfSJeff Kirsher 279a88394cfSJeff Kirsher spin_lock_irqsave(&private->lock,flags); 280a88394cfSJeff Kirsher activate_transmitter(private); 281a88394cfSJeff Kirsher activate_receiver(private); 282a88394cfSJeff Kirsher spin_unlock_irqrestore(&private->lock,flags); 283a88394cfSJeff Kirsher 284a88394cfSJeff Kirsher trigger_receive(private); 285d59a1881SFrancois Romieu out: 286d59a1881SFrancois Romieu return rc; 287a88394cfSJeff Kirsher 288ebaf7f8fSFrancois Romieu err_unmap: 289ebaf7f8fSFrancois Romieu pci_iounmap(pdev, private->ioaddr); 290a88394cfSJeff Kirsher reg_fail: 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 */ 310779c1a85SBill Pemberton static void 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); 317ebaf7f8fSFrancois Romieu pci_iounmap(pdev, card->ioaddr); 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); 329ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 330a88394cfSJeff Kirsher unsigned int status; 331a88394cfSJeff Kirsher int i; 332a88394cfSJeff Kirsher 333a88394cfSJeff Kirsher spin_lock(&card->lock); 334ebaf7f8fSFrancois Romieu status = xr32(CSR5); 335a88394cfSJeff Kirsher 336a88394cfSJeff Kirsher #if defined DEBUG && DEBUG > 1 337a88394cfSJeff Kirsher print_binary(status); 338a88394cfSJeff Kirsher pr_debug("tx status 0x%08x 0x%08x\n", 339a88394cfSJeff Kirsher card->tx_buffer[0], card->tx_buffer[4]); 340a88394cfSJeff Kirsher pr_debug("rx status 0x%08x 0x%08x\n", 341a88394cfSJeff Kirsher card->rx_buffer[0], card->rx_buffer[4]); 342a88394cfSJeff Kirsher #endif 343a88394cfSJeff Kirsher /* Handle shared irq and hotplug */ 344a88394cfSJeff Kirsher if (status == 0 || status == 0xffffffff) { 345a88394cfSJeff Kirsher spin_unlock(&card->lock); 346a88394cfSJeff Kirsher return IRQ_NONE; 347a88394cfSJeff Kirsher } 348a88394cfSJeff Kirsher 349a88394cfSJeff Kirsher if (link_status_changed(card)) { 350a88394cfSJeff Kirsher int newlink; 351a88394cfSJeff Kirsher netdev_dbg(dev, "Link status has changed\n"); 352a88394cfSJeff Kirsher newlink = link_status(card); 353a88394cfSJeff Kirsher netdev_info(dev, "Link is %d mbit\n", newlink); 354a88394cfSJeff Kirsher if (newlink) 355a88394cfSJeff Kirsher netif_carrier_on(dev); 356a88394cfSJeff Kirsher else 357a88394cfSJeff Kirsher netif_carrier_off(dev); 358a88394cfSJeff Kirsher 359a88394cfSJeff Kirsher } 360a88394cfSJeff Kirsher 361a88394cfSJeff Kirsher /* Clear all remaining interrupts */ 362a88394cfSJeff Kirsher status |= 0xffffffff; /* FIXME: make this clear only the 363a88394cfSJeff Kirsher real existing bits */ 364ebaf7f8fSFrancois Romieu xw32(CSR5, status); 365a88394cfSJeff Kirsher 366a88394cfSJeff Kirsher 367a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 368a88394cfSJeff Kirsher investigate_write_descriptor(dev,card,i,bufferoffsets[i]); 369a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 370a88394cfSJeff Kirsher investigate_read_descriptor(dev,card,i,bufferoffsets[i]); 371a88394cfSJeff Kirsher 372a88394cfSJeff Kirsher spin_unlock(&card->lock); 373a88394cfSJeff Kirsher return IRQ_HANDLED; 374a88394cfSJeff Kirsher } 375a88394cfSJeff Kirsher 376a88394cfSJeff Kirsher static netdev_tx_t xircom_start_xmit(struct sk_buff *skb, 377a88394cfSJeff Kirsher struct net_device *dev) 378a88394cfSJeff Kirsher { 379a88394cfSJeff Kirsher struct xircom_private *card; 380a88394cfSJeff Kirsher unsigned long flags; 381a88394cfSJeff Kirsher int nextdescriptor; 382a88394cfSJeff Kirsher int desc; 383a88394cfSJeff Kirsher 384a88394cfSJeff Kirsher card = netdev_priv(dev); 385a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock,flags); 386a88394cfSJeff Kirsher 387a88394cfSJeff Kirsher /* First see if we can free some descriptors */ 388a88394cfSJeff Kirsher for (desc=0;desc<NUMDESCRIPTORS;desc++) 389a88394cfSJeff Kirsher investigate_write_descriptor(dev,card,desc,bufferoffsets[desc]); 390a88394cfSJeff Kirsher 391a88394cfSJeff Kirsher 392a88394cfSJeff Kirsher nextdescriptor = (card->transmit_used +1) % (NUMDESCRIPTORS); 393a88394cfSJeff Kirsher desc = card->transmit_used; 394a88394cfSJeff Kirsher 395a88394cfSJeff Kirsher /* only send the packet if the descriptor is free */ 396a88394cfSJeff Kirsher if (card->tx_buffer[4*desc]==0) { 397a88394cfSJeff Kirsher /* Copy the packet data; zero the memory first as the card 398a88394cfSJeff Kirsher sometimes sends more than you ask it to. */ 399a88394cfSJeff Kirsher 400a88394cfSJeff Kirsher memset(&card->tx_buffer[bufferoffsets[desc]/4],0,1536); 401a88394cfSJeff Kirsher skb_copy_from_linear_data(skb, 402a88394cfSJeff Kirsher &(card->tx_buffer[bufferoffsets[desc] / 4]), 403a88394cfSJeff Kirsher skb->len); 404a88394cfSJeff Kirsher /* FIXME: The specification tells us that the length we send HAS to be a multiple of 405a88394cfSJeff Kirsher 4 bytes. */ 406a88394cfSJeff Kirsher 407a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] = cpu_to_le32(skb->len); 408a88394cfSJeff Kirsher if (desc == NUMDESCRIPTORS - 1) /* bit 25: last descriptor of the ring */ 409a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] |= cpu_to_le32(1<<25); 410a88394cfSJeff Kirsher 411a88394cfSJeff Kirsher card->tx_buffer[4*desc+1] |= cpu_to_le32(0xF0000000); 412a88394cfSJeff Kirsher /* 0xF0... means want interrupts*/ 413a88394cfSJeff Kirsher card->tx_skb[desc] = skb; 414a88394cfSJeff Kirsher 415a88394cfSJeff Kirsher wmb(); 416a88394cfSJeff Kirsher /* This gives the descriptor to the card */ 417a88394cfSJeff Kirsher card->tx_buffer[4*desc] = cpu_to_le32(0x80000000); 418a88394cfSJeff Kirsher trigger_transmit(card); 419a88394cfSJeff Kirsher if (card->tx_buffer[nextdescriptor*4] & cpu_to_le32(0x8000000)) { 420a88394cfSJeff Kirsher /* next descriptor is occupied... */ 421a88394cfSJeff Kirsher netif_stop_queue(dev); 422a88394cfSJeff Kirsher } 423a88394cfSJeff Kirsher card->transmit_used = nextdescriptor; 424a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 425a88394cfSJeff Kirsher return NETDEV_TX_OK; 426a88394cfSJeff Kirsher } 427a88394cfSJeff Kirsher 428a88394cfSJeff Kirsher /* Uh oh... no free descriptor... drop the packet */ 429a88394cfSJeff Kirsher netif_stop_queue(dev); 430a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 431a88394cfSJeff Kirsher trigger_transmit(card); 432a88394cfSJeff Kirsher 433a88394cfSJeff Kirsher return NETDEV_TX_BUSY; 434a88394cfSJeff Kirsher } 435a88394cfSJeff Kirsher 436a88394cfSJeff Kirsher 437a88394cfSJeff Kirsher 438a88394cfSJeff Kirsher 439a88394cfSJeff Kirsher static int xircom_open(struct net_device *dev) 440a88394cfSJeff Kirsher { 441a88394cfSJeff Kirsher struct xircom_private *xp = netdev_priv(dev); 442ebaf7f8fSFrancois Romieu const int irq = xp->pdev->irq; 443a88394cfSJeff Kirsher int retval; 444a88394cfSJeff Kirsher 445ebaf7f8fSFrancois Romieu netdev_info(dev, "xircom cardbus adaptor found, using irq %i\n", irq); 446ebaf7f8fSFrancois Romieu retval = request_irq(irq, xircom_interrupt, IRQF_SHARED, dev->name, dev); 447a88394cfSJeff Kirsher if (retval) 448a88394cfSJeff Kirsher return retval; 449a88394cfSJeff Kirsher 450a88394cfSJeff Kirsher xircom_up(xp); 451a88394cfSJeff Kirsher xp->open = 1; 452a88394cfSJeff Kirsher 453a88394cfSJeff Kirsher return 0; 454a88394cfSJeff Kirsher } 455a88394cfSJeff Kirsher 456a88394cfSJeff Kirsher static int xircom_close(struct net_device *dev) 457a88394cfSJeff Kirsher { 458a88394cfSJeff Kirsher struct xircom_private *card; 459a88394cfSJeff Kirsher unsigned long flags; 460a88394cfSJeff Kirsher 461a88394cfSJeff Kirsher card = netdev_priv(dev); 462a88394cfSJeff Kirsher netif_stop_queue(dev); /* we don't want new packets */ 463a88394cfSJeff Kirsher 464a88394cfSJeff Kirsher 465a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock,flags); 466a88394cfSJeff Kirsher 467a88394cfSJeff Kirsher disable_all_interrupts(card); 468a88394cfSJeff Kirsher #if 0 469a88394cfSJeff Kirsher /* We can enable this again once we send dummy packets on ifconfig ethX up */ 470a88394cfSJeff Kirsher deactivate_receiver(card); 471a88394cfSJeff Kirsher deactivate_transmitter(card); 472a88394cfSJeff Kirsher #endif 473a88394cfSJeff Kirsher remove_descriptors(card); 474a88394cfSJeff Kirsher 475a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock,flags); 476a88394cfSJeff Kirsher 477a88394cfSJeff Kirsher card->open = 0; 478ebaf7f8fSFrancois Romieu free_irq(card->pdev->irq, dev); 479a88394cfSJeff Kirsher 480a88394cfSJeff Kirsher return 0; 481a88394cfSJeff Kirsher 482a88394cfSJeff Kirsher } 483a88394cfSJeff Kirsher 484a88394cfSJeff Kirsher 485a88394cfSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 486a88394cfSJeff Kirsher static void xircom_poll_controller(struct net_device *dev) 487a88394cfSJeff Kirsher { 488ebaf7f8fSFrancois Romieu struct xircom_private *xp = netdev_priv(dev); 489ebaf7f8fSFrancois Romieu const int irq = xp->pdev->irq; 490ebaf7f8fSFrancois Romieu 491ebaf7f8fSFrancois Romieu disable_irq(irq); 492ebaf7f8fSFrancois Romieu xircom_interrupt(irq, dev); 493ebaf7f8fSFrancois Romieu enable_irq(irq); 494a88394cfSJeff Kirsher } 495a88394cfSJeff Kirsher #endif 496a88394cfSJeff Kirsher 497a88394cfSJeff Kirsher 498a88394cfSJeff Kirsher static void initialize_card(struct xircom_private *card) 499a88394cfSJeff Kirsher { 500ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 501a88394cfSJeff Kirsher unsigned long flags; 502ebaf7f8fSFrancois Romieu u32 val; 503a88394cfSJeff Kirsher 504a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 505a88394cfSJeff Kirsher 506a88394cfSJeff Kirsher /* First: reset the card */ 507ebaf7f8fSFrancois Romieu val = xr32(CSR0); 508a88394cfSJeff Kirsher val |= 0x01; /* Software reset */ 509ebaf7f8fSFrancois Romieu xw32(CSR0, val); 510a88394cfSJeff Kirsher 511a88394cfSJeff Kirsher udelay(100); /* give the card some time to reset */ 512a88394cfSJeff Kirsher 513ebaf7f8fSFrancois Romieu val = xr32(CSR0); 514a88394cfSJeff Kirsher val &= ~0x01; /* disable Software reset */ 515ebaf7f8fSFrancois Romieu xw32(CSR0, val); 516a88394cfSJeff Kirsher 517a88394cfSJeff Kirsher 518a88394cfSJeff Kirsher val = 0; /* Value 0x00 is a safe and conservative value 519a88394cfSJeff Kirsher for the PCI configuration settings */ 520ebaf7f8fSFrancois Romieu xw32(CSR0, val); 521a88394cfSJeff Kirsher 522a88394cfSJeff Kirsher 523a88394cfSJeff Kirsher disable_all_interrupts(card); 524a88394cfSJeff Kirsher deactivate_receiver(card); 525a88394cfSJeff Kirsher deactivate_transmitter(card); 526a88394cfSJeff Kirsher 527a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 528a88394cfSJeff Kirsher } 529a88394cfSJeff Kirsher 530a88394cfSJeff Kirsher /* 531a88394cfSJeff Kirsher trigger_transmit causes the card to check for frames to be transmitted. 532a88394cfSJeff Kirsher This is accomplished by writing to the CSR1 port. The documentation 533a88394cfSJeff Kirsher claims that the act of writing is sufficient and that the value is 534a88394cfSJeff Kirsher ignored; I chose zero. 535a88394cfSJeff Kirsher */ 536a88394cfSJeff Kirsher static void trigger_transmit(struct xircom_private *card) 537a88394cfSJeff Kirsher { 538ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 539a88394cfSJeff Kirsher 540ebaf7f8fSFrancois Romieu xw32(CSR1, 0); 541a88394cfSJeff Kirsher } 542a88394cfSJeff Kirsher 543a88394cfSJeff Kirsher /* 544a88394cfSJeff Kirsher trigger_receive causes the card to check for empty frames in the 545a88394cfSJeff Kirsher descriptor list in which packets can be received. 546a88394cfSJeff Kirsher This is accomplished by writing to the CSR2 port. The documentation 547a88394cfSJeff Kirsher claims that the act of writing is sufficient and that the value is 548a88394cfSJeff Kirsher ignored; I chose zero. 549a88394cfSJeff Kirsher */ 550a88394cfSJeff Kirsher static void trigger_receive(struct xircom_private *card) 551a88394cfSJeff Kirsher { 552ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 553a88394cfSJeff Kirsher 554ebaf7f8fSFrancois Romieu xw32(CSR2, 0); 555a88394cfSJeff Kirsher } 556a88394cfSJeff Kirsher 557a88394cfSJeff Kirsher /* 558a88394cfSJeff Kirsher setup_descriptors initializes the send and receive buffers to be valid 559a88394cfSJeff Kirsher descriptors and programs the addresses into the card. 560a88394cfSJeff Kirsher */ 561a88394cfSJeff Kirsher static void setup_descriptors(struct xircom_private *card) 562a88394cfSJeff Kirsher { 563ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 564a88394cfSJeff Kirsher u32 address; 565a88394cfSJeff Kirsher int i; 566a88394cfSJeff Kirsher 567a88394cfSJeff Kirsher BUG_ON(card->rx_buffer == NULL); 568a88394cfSJeff Kirsher BUG_ON(card->tx_buffer == NULL); 569a88394cfSJeff Kirsher 570a88394cfSJeff Kirsher /* Receive descriptors */ 571a88394cfSJeff Kirsher memset(card->rx_buffer, 0, 128); /* clear the descriptors */ 572a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++ ) { 573a88394cfSJeff Kirsher 574a88394cfSJeff Kirsher /* Rx Descr0: It's empty, let the card own it, no errors -> 0x80000000 */ 575a88394cfSJeff Kirsher card->rx_buffer[i*4 + 0] = cpu_to_le32(0x80000000); 576a88394cfSJeff Kirsher /* Rx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ 577a88394cfSJeff Kirsher card->rx_buffer[i*4 + 1] = cpu_to_le32(1536); 578a88394cfSJeff Kirsher if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */ 579a88394cfSJeff Kirsher card->rx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25); 580a88394cfSJeff Kirsher 581a88394cfSJeff Kirsher /* Rx Descr2: address of the buffer 582a88394cfSJeff Kirsher we store the buffer at the 2nd half of the page */ 583a88394cfSJeff Kirsher 584a88394cfSJeff Kirsher address = card->rx_dma_handle; 585a88394cfSJeff Kirsher card->rx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); 586a88394cfSJeff Kirsher /* Rx Desc3: address of 2nd buffer -> 0 */ 587a88394cfSJeff Kirsher card->rx_buffer[i*4 + 3] = 0; 588a88394cfSJeff Kirsher } 589a88394cfSJeff Kirsher 590a88394cfSJeff Kirsher wmb(); 591a88394cfSJeff Kirsher /* Write the receive descriptor ring address to the card */ 592a88394cfSJeff Kirsher address = card->rx_dma_handle; 593ebaf7f8fSFrancois Romieu xw32(CSR3, address); /* Receive descr list address */ 594a88394cfSJeff Kirsher 595a88394cfSJeff Kirsher 596a88394cfSJeff Kirsher /* transmit descriptors */ 597a88394cfSJeff Kirsher memset(card->tx_buffer, 0, 128); /* clear the descriptors */ 598a88394cfSJeff Kirsher 599a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++ ) { 600a88394cfSJeff Kirsher /* Tx Descr0: Empty, we own it, no errors -> 0x00000000 */ 601a88394cfSJeff Kirsher card->tx_buffer[i*4 + 0] = 0x00000000; 602a88394cfSJeff Kirsher /* Tx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ 603a88394cfSJeff Kirsher card->tx_buffer[i*4 + 1] = cpu_to_le32(1536); 604a88394cfSJeff Kirsher if (i == NUMDESCRIPTORS - 1) /* bit 25 is "last descriptor" */ 605a88394cfSJeff Kirsher card->tx_buffer[i*4 + 1] |= cpu_to_le32(1 << 25); 606a88394cfSJeff Kirsher 607a88394cfSJeff Kirsher /* Tx Descr2: address of the buffer 608a88394cfSJeff Kirsher we store the buffer at the 2nd half of the page */ 609a88394cfSJeff Kirsher address = card->tx_dma_handle; 610a88394cfSJeff Kirsher card->tx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); 611a88394cfSJeff Kirsher /* Tx Desc3: address of 2nd buffer -> 0 */ 612a88394cfSJeff Kirsher card->tx_buffer[i*4 + 3] = 0; 613a88394cfSJeff Kirsher } 614a88394cfSJeff Kirsher 615a88394cfSJeff Kirsher wmb(); 616a88394cfSJeff Kirsher /* wite the transmit descriptor ring to the card */ 617a88394cfSJeff Kirsher address = card->tx_dma_handle; 618ebaf7f8fSFrancois Romieu xw32(CSR4, address); /* xmit descr list address */ 619a88394cfSJeff Kirsher } 620a88394cfSJeff Kirsher 621a88394cfSJeff Kirsher /* 622a88394cfSJeff Kirsher remove_descriptors informs the card the descriptors are no longer 623a88394cfSJeff Kirsher valid by setting the address in the card to 0x00. 624a88394cfSJeff Kirsher */ 625a88394cfSJeff Kirsher static void remove_descriptors(struct xircom_private *card) 626a88394cfSJeff Kirsher { 627ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 628a88394cfSJeff Kirsher unsigned int val; 629a88394cfSJeff Kirsher 630a88394cfSJeff Kirsher val = 0; 631ebaf7f8fSFrancois Romieu xw32(CSR3, val); /* Receive descriptor address */ 632ebaf7f8fSFrancois Romieu xw32(CSR4, val); /* Send descriptor address */ 633a88394cfSJeff Kirsher } 634a88394cfSJeff Kirsher 635a88394cfSJeff Kirsher /* 636a88394cfSJeff Kirsher link_status_changed returns 1 if the card has indicated that 637a88394cfSJeff Kirsher the link status has changed. The new link status has to be read from CSR12. 638a88394cfSJeff Kirsher 639a88394cfSJeff Kirsher This function also clears the status-bit. 640a88394cfSJeff Kirsher */ 641a88394cfSJeff Kirsher static int link_status_changed(struct xircom_private *card) 642a88394cfSJeff Kirsher { 643ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 644a88394cfSJeff Kirsher unsigned int val; 645a88394cfSJeff Kirsher 646ebaf7f8fSFrancois Romieu val = xr32(CSR5); /* Status register */ 647ebaf7f8fSFrancois Romieu if (!(val & (1 << 27))) /* no change */ 648a88394cfSJeff Kirsher return 0; 649a88394cfSJeff Kirsher 650a88394cfSJeff Kirsher /* clear the event by writing a 1 to the bit in the 651a88394cfSJeff Kirsher status register. */ 652a88394cfSJeff Kirsher val = (1 << 27); 653ebaf7f8fSFrancois Romieu xw32(CSR5, val); 654a88394cfSJeff Kirsher 655a88394cfSJeff Kirsher return 1; 656a88394cfSJeff Kirsher } 657a88394cfSJeff Kirsher 658a88394cfSJeff Kirsher 659a88394cfSJeff Kirsher /* 660a88394cfSJeff Kirsher transmit_active returns 1 if the transmitter on the card is 661a88394cfSJeff Kirsher in a non-stopped state. 662a88394cfSJeff Kirsher */ 663a88394cfSJeff Kirsher static int transmit_active(struct xircom_private *card) 664a88394cfSJeff Kirsher { 665ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 666a88394cfSJeff Kirsher 667ebaf7f8fSFrancois Romieu if (!(xr32(CSR5) & (7 << 20))) /* transmitter disabled */ 668a88394cfSJeff Kirsher return 0; 669a88394cfSJeff Kirsher 670a88394cfSJeff Kirsher return 1; 671a88394cfSJeff Kirsher } 672a88394cfSJeff Kirsher 673a88394cfSJeff Kirsher /* 674a88394cfSJeff Kirsher receive_active returns 1 if the receiver on the card is 675a88394cfSJeff Kirsher in a non-stopped state. 676a88394cfSJeff Kirsher */ 677a88394cfSJeff Kirsher static int receive_active(struct xircom_private *card) 678a88394cfSJeff Kirsher { 679ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 680a88394cfSJeff Kirsher 681ebaf7f8fSFrancois Romieu if (!(xr32(CSR5) & (7 << 17))) /* receiver disabled */ 682a88394cfSJeff Kirsher return 0; 683a88394cfSJeff Kirsher 684a88394cfSJeff Kirsher return 1; 685a88394cfSJeff Kirsher } 686a88394cfSJeff Kirsher 687a88394cfSJeff Kirsher /* 688a88394cfSJeff Kirsher activate_receiver enables the receiver on the card. 689a88394cfSJeff Kirsher Before being allowed to active the receiver, the receiver 690a88394cfSJeff Kirsher must be completely de-activated. To achieve this, 691a88394cfSJeff Kirsher this code actually disables the receiver first; then it waits for the 692a88394cfSJeff Kirsher receiver to become inactive, then it activates the receiver and then 693a88394cfSJeff Kirsher it waits for the receiver to be active. 694a88394cfSJeff Kirsher 695a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 696a88394cfSJeff Kirsher */ 697a88394cfSJeff Kirsher static void activate_receiver(struct xircom_private *card) 698a88394cfSJeff Kirsher { 699ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 700a88394cfSJeff Kirsher unsigned int val; 701a88394cfSJeff Kirsher int counter; 702a88394cfSJeff Kirsher 703ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 704a88394cfSJeff Kirsher 705a88394cfSJeff Kirsher /* If the "active" bit is set and the receiver is already 706a88394cfSJeff Kirsher active, no need to do the expensive thing */ 707a88394cfSJeff Kirsher if ((val&2) && (receive_active(card))) 708a88394cfSJeff Kirsher return; 709a88394cfSJeff Kirsher 710a88394cfSJeff Kirsher 711a88394cfSJeff Kirsher val = val & ~2; /* disable the receiver */ 712ebaf7f8fSFrancois Romieu xw32(CSR6, val); 713a88394cfSJeff Kirsher 714a88394cfSJeff Kirsher counter = 10; 715a88394cfSJeff Kirsher while (counter > 0) { 716a88394cfSJeff Kirsher if (!receive_active(card)) 717a88394cfSJeff Kirsher break; 718a88394cfSJeff Kirsher /* wait a while */ 719a88394cfSJeff Kirsher udelay(50); 720a88394cfSJeff Kirsher counter--; 721a88394cfSJeff Kirsher if (counter <= 0) 722a88394cfSJeff Kirsher netdev_err(card->dev, "Receiver failed to deactivate\n"); 723a88394cfSJeff Kirsher } 724a88394cfSJeff Kirsher 725a88394cfSJeff Kirsher /* enable the receiver */ 726ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 727a88394cfSJeff Kirsher val = val | 2; /* enable the receiver */ 728ebaf7f8fSFrancois Romieu xw32(CSR6, val); 729a88394cfSJeff Kirsher 730a88394cfSJeff Kirsher /* now wait for the card to activate again */ 731a88394cfSJeff Kirsher counter = 10; 732a88394cfSJeff Kirsher while (counter > 0) { 733a88394cfSJeff Kirsher if (receive_active(card)) 734a88394cfSJeff Kirsher break; 735a88394cfSJeff Kirsher /* wait a while */ 736a88394cfSJeff Kirsher udelay(50); 737a88394cfSJeff Kirsher counter--; 738a88394cfSJeff Kirsher if (counter <= 0) 739a88394cfSJeff Kirsher netdev_err(card->dev, 740a88394cfSJeff Kirsher "Receiver failed to re-activate\n"); 741a88394cfSJeff Kirsher } 742a88394cfSJeff Kirsher } 743a88394cfSJeff Kirsher 744a88394cfSJeff Kirsher /* 745a88394cfSJeff Kirsher deactivate_receiver disables the receiver on the card. 746a88394cfSJeff Kirsher To achieve this this code disables the receiver first; 747a88394cfSJeff Kirsher then it waits for the receiver to become inactive. 748a88394cfSJeff Kirsher 749a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 750a88394cfSJeff Kirsher */ 751a88394cfSJeff Kirsher static void deactivate_receiver(struct xircom_private *card) 752a88394cfSJeff Kirsher { 753ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 754a88394cfSJeff Kirsher unsigned int val; 755a88394cfSJeff Kirsher int counter; 756a88394cfSJeff Kirsher 757ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 758a88394cfSJeff Kirsher val = val & ~2; /* disable the receiver */ 759ebaf7f8fSFrancois Romieu xw32(CSR6, val); 760a88394cfSJeff Kirsher 761a88394cfSJeff Kirsher counter = 10; 762a88394cfSJeff Kirsher while (counter > 0) { 763a88394cfSJeff Kirsher if (!receive_active(card)) 764a88394cfSJeff Kirsher break; 765a88394cfSJeff Kirsher /* wait a while */ 766a88394cfSJeff Kirsher udelay(50); 767a88394cfSJeff Kirsher counter--; 768a88394cfSJeff Kirsher if (counter <= 0) 769a88394cfSJeff Kirsher netdev_err(card->dev, "Receiver failed to deactivate\n"); 770a88394cfSJeff Kirsher } 771a88394cfSJeff Kirsher } 772a88394cfSJeff Kirsher 773a88394cfSJeff Kirsher 774a88394cfSJeff Kirsher /* 775a88394cfSJeff Kirsher activate_transmitter enables the transmitter on the card. 776a88394cfSJeff Kirsher Before being allowed to active the transmitter, the transmitter 777a88394cfSJeff Kirsher must be completely de-activated. To achieve this, 778a88394cfSJeff Kirsher this code actually disables the transmitter first; then it waits for the 779a88394cfSJeff Kirsher transmitter to become inactive, then it activates the transmitter and then 780a88394cfSJeff Kirsher it waits for the transmitter to be active again. 781a88394cfSJeff Kirsher 782a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 783a88394cfSJeff Kirsher */ 784a88394cfSJeff Kirsher static void activate_transmitter(struct xircom_private *card) 785a88394cfSJeff Kirsher { 786ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 787a88394cfSJeff Kirsher unsigned int val; 788a88394cfSJeff Kirsher int counter; 789a88394cfSJeff Kirsher 790ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 791a88394cfSJeff Kirsher 792a88394cfSJeff Kirsher /* If the "active" bit is set and the receiver is already 793a88394cfSJeff Kirsher active, no need to do the expensive thing */ 794a88394cfSJeff Kirsher if ((val&(1<<13)) && (transmit_active(card))) 795a88394cfSJeff Kirsher return; 796a88394cfSJeff Kirsher 797a88394cfSJeff Kirsher val = val & ~(1 << 13); /* disable the transmitter */ 798ebaf7f8fSFrancois Romieu xw32(CSR6, val); 799a88394cfSJeff Kirsher 800a88394cfSJeff Kirsher counter = 10; 801a88394cfSJeff Kirsher while (counter > 0) { 802a88394cfSJeff Kirsher if (!transmit_active(card)) 803a88394cfSJeff Kirsher break; 804a88394cfSJeff Kirsher /* wait a while */ 805a88394cfSJeff Kirsher udelay(50); 806a88394cfSJeff Kirsher counter--; 807a88394cfSJeff Kirsher if (counter <= 0) 808a88394cfSJeff Kirsher netdev_err(card->dev, 809a88394cfSJeff Kirsher "Transmitter failed to deactivate\n"); 810a88394cfSJeff Kirsher } 811a88394cfSJeff Kirsher 812a88394cfSJeff Kirsher /* enable the transmitter */ 813ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 814a88394cfSJeff Kirsher val = val | (1 << 13); /* enable the transmitter */ 815ebaf7f8fSFrancois Romieu xw32(CSR6, val); 816a88394cfSJeff Kirsher 817a88394cfSJeff Kirsher /* now wait for the card to activate again */ 818a88394cfSJeff Kirsher counter = 10; 819a88394cfSJeff Kirsher while (counter > 0) { 820a88394cfSJeff Kirsher if (transmit_active(card)) 821a88394cfSJeff Kirsher break; 822a88394cfSJeff Kirsher /* wait a while */ 823a88394cfSJeff Kirsher udelay(50); 824a88394cfSJeff Kirsher counter--; 825a88394cfSJeff Kirsher if (counter <= 0) 826a88394cfSJeff Kirsher netdev_err(card->dev, 827a88394cfSJeff Kirsher "Transmitter failed to re-activate\n"); 828a88394cfSJeff Kirsher } 829a88394cfSJeff Kirsher } 830a88394cfSJeff Kirsher 831a88394cfSJeff Kirsher /* 832a88394cfSJeff Kirsher deactivate_transmitter disables the transmitter on the card. 833a88394cfSJeff Kirsher To achieve this this code disables the transmitter first; 834a88394cfSJeff Kirsher then it waits for the transmitter to become inactive. 835a88394cfSJeff Kirsher 836a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 837a88394cfSJeff Kirsher */ 838a88394cfSJeff Kirsher static void deactivate_transmitter(struct xircom_private *card) 839a88394cfSJeff Kirsher { 840ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 841a88394cfSJeff Kirsher unsigned int val; 842a88394cfSJeff Kirsher int counter; 843a88394cfSJeff Kirsher 844ebaf7f8fSFrancois Romieu val = xr32(CSR6); /* Operation mode */ 845a88394cfSJeff Kirsher val = val & ~2; /* disable the transmitter */ 846ebaf7f8fSFrancois Romieu xw32(CSR6, val); 847a88394cfSJeff Kirsher 848a88394cfSJeff Kirsher counter = 20; 849a88394cfSJeff Kirsher while (counter > 0) { 850a88394cfSJeff Kirsher if (!transmit_active(card)) 851a88394cfSJeff Kirsher break; 852a88394cfSJeff Kirsher /* wait a while */ 853a88394cfSJeff Kirsher udelay(50); 854a88394cfSJeff Kirsher counter--; 855a88394cfSJeff Kirsher if (counter <= 0) 856a88394cfSJeff Kirsher netdev_err(card->dev, 857a88394cfSJeff Kirsher "Transmitter failed to deactivate\n"); 858a88394cfSJeff Kirsher } 859a88394cfSJeff Kirsher } 860a88394cfSJeff Kirsher 861a88394cfSJeff Kirsher 862a88394cfSJeff Kirsher /* 863a88394cfSJeff Kirsher enable_transmit_interrupt enables the transmit interrupt 864a88394cfSJeff Kirsher 865a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 866a88394cfSJeff Kirsher */ 867a88394cfSJeff Kirsher static void enable_transmit_interrupt(struct xircom_private *card) 868a88394cfSJeff Kirsher { 869ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 870a88394cfSJeff Kirsher unsigned int val; 871a88394cfSJeff Kirsher 872ebaf7f8fSFrancois Romieu val = xr32(CSR7); /* Interrupt enable register */ 873a88394cfSJeff Kirsher val |= 1; /* enable the transmit interrupt */ 874ebaf7f8fSFrancois Romieu xw32(CSR7, val); 875a88394cfSJeff Kirsher } 876a88394cfSJeff Kirsher 877a88394cfSJeff Kirsher 878a88394cfSJeff Kirsher /* 879a88394cfSJeff Kirsher enable_receive_interrupt enables the receive interrupt 880a88394cfSJeff Kirsher 881a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 882a88394cfSJeff Kirsher */ 883a88394cfSJeff Kirsher static void enable_receive_interrupt(struct xircom_private *card) 884a88394cfSJeff Kirsher { 885ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 886a88394cfSJeff Kirsher unsigned int val; 887a88394cfSJeff Kirsher 888ebaf7f8fSFrancois Romieu val = xr32(CSR7); /* Interrupt enable register */ 889a88394cfSJeff Kirsher val = val | (1 << 6); /* enable the receive interrupt */ 890ebaf7f8fSFrancois Romieu xw32(CSR7, val); 891a88394cfSJeff Kirsher } 892a88394cfSJeff Kirsher 893a88394cfSJeff Kirsher /* 894a88394cfSJeff Kirsher enable_link_interrupt enables the link status change interrupt 895a88394cfSJeff Kirsher 896a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 897a88394cfSJeff Kirsher */ 898a88394cfSJeff Kirsher static void enable_link_interrupt(struct xircom_private *card) 899a88394cfSJeff Kirsher { 900ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 901a88394cfSJeff Kirsher unsigned int val; 902a88394cfSJeff Kirsher 903ebaf7f8fSFrancois Romieu val = xr32(CSR7); /* Interrupt enable register */ 904a88394cfSJeff Kirsher val = val | (1 << 27); /* enable the link status chage interrupt */ 905ebaf7f8fSFrancois Romieu xw32(CSR7, val); 906a88394cfSJeff Kirsher } 907a88394cfSJeff Kirsher 908a88394cfSJeff Kirsher 909a88394cfSJeff Kirsher 910a88394cfSJeff Kirsher /* 911a88394cfSJeff Kirsher disable_all_interrupts disables all interrupts 912a88394cfSJeff Kirsher 913a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 914a88394cfSJeff Kirsher */ 915a88394cfSJeff Kirsher static void disable_all_interrupts(struct xircom_private *card) 916a88394cfSJeff Kirsher { 917ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 918a88394cfSJeff Kirsher 919ebaf7f8fSFrancois Romieu xw32(CSR7, 0); 920a88394cfSJeff Kirsher } 921a88394cfSJeff Kirsher 922a88394cfSJeff Kirsher /* 923a88394cfSJeff Kirsher enable_common_interrupts enables several weird interrupts 924a88394cfSJeff Kirsher 925a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 926a88394cfSJeff Kirsher */ 927a88394cfSJeff Kirsher static void enable_common_interrupts(struct xircom_private *card) 928a88394cfSJeff Kirsher { 929ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 930a88394cfSJeff Kirsher unsigned int val; 931a88394cfSJeff Kirsher 932ebaf7f8fSFrancois Romieu val = xr32(CSR7); /* Interrupt enable register */ 933a88394cfSJeff Kirsher val |= (1<<16); /* Normal Interrupt Summary */ 934a88394cfSJeff Kirsher val |= (1<<15); /* Abnormal Interrupt Summary */ 935a88394cfSJeff Kirsher val |= (1<<13); /* Fatal bus error */ 936a88394cfSJeff Kirsher val |= (1<<8); /* Receive Process Stopped */ 937a88394cfSJeff Kirsher val |= (1<<7); /* Receive Buffer Unavailable */ 938a88394cfSJeff Kirsher val |= (1<<5); /* Transmit Underflow */ 939a88394cfSJeff Kirsher val |= (1<<2); /* Transmit Buffer Unavailable */ 940a88394cfSJeff Kirsher val |= (1<<1); /* Transmit Process Stopped */ 941ebaf7f8fSFrancois Romieu xw32(CSR7, val); 942a88394cfSJeff Kirsher } 943a88394cfSJeff Kirsher 944a88394cfSJeff Kirsher /* 945a88394cfSJeff Kirsher enable_promisc starts promisc mode 946a88394cfSJeff Kirsher 947a88394cfSJeff Kirsher must be called with the lock held and interrupts disabled. 948a88394cfSJeff Kirsher */ 949a88394cfSJeff Kirsher static int enable_promisc(struct xircom_private *card) 950a88394cfSJeff Kirsher { 951ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 952a88394cfSJeff Kirsher unsigned int val; 953a88394cfSJeff Kirsher 954ebaf7f8fSFrancois Romieu val = xr32(CSR6); 955a88394cfSJeff Kirsher val = val | (1 << 6); 956ebaf7f8fSFrancois Romieu xw32(CSR6, val); 957a88394cfSJeff Kirsher 958a88394cfSJeff Kirsher return 1; 959a88394cfSJeff Kirsher } 960a88394cfSJeff Kirsher 961a88394cfSJeff Kirsher 962a88394cfSJeff Kirsher 963a88394cfSJeff Kirsher 964a88394cfSJeff Kirsher /* 965a88394cfSJeff Kirsher link_status() checks the links status and will return 0 for no link, 10 for 10mbit link and 100 for.. guess what. 966a88394cfSJeff Kirsher 967a88394cfSJeff Kirsher Must be called in locked state with interrupts disabled 968a88394cfSJeff Kirsher */ 969a88394cfSJeff Kirsher static int link_status(struct xircom_private *card) 970a88394cfSJeff Kirsher { 971ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 972ebaf7f8fSFrancois Romieu u8 val; 973a88394cfSJeff Kirsher 974ebaf7f8fSFrancois Romieu val = xr8(CSR12); 975a88394cfSJeff Kirsher 976ebaf7f8fSFrancois Romieu /* bit 2 is 0 for 10mbit link, 1 for not an 10mbit link */ 977ebaf7f8fSFrancois Romieu if (!(val & (1 << 2))) 978a88394cfSJeff Kirsher return 10; 979ebaf7f8fSFrancois Romieu /* bit 1 is 0 for 100mbit link, 1 for not an 100mbit link */ 980ebaf7f8fSFrancois Romieu if (!(val & (1 << 1))) 981a88394cfSJeff Kirsher return 100; 982a88394cfSJeff Kirsher 983a88394cfSJeff Kirsher /* If we get here -> no link at all */ 984a88394cfSJeff Kirsher 985a88394cfSJeff Kirsher return 0; 986a88394cfSJeff Kirsher } 987a88394cfSJeff Kirsher 988a88394cfSJeff Kirsher 989a88394cfSJeff Kirsher 990a88394cfSJeff Kirsher 991a88394cfSJeff Kirsher 992a88394cfSJeff Kirsher /* 993a88394cfSJeff Kirsher read_mac_address() reads the MAC address from the NIC and stores it in the "dev" structure. 994a88394cfSJeff Kirsher 995a88394cfSJeff Kirsher This function will take the spinlock itself and can, as a result, not be called with the lock helt. 996a88394cfSJeff Kirsher */ 997a88394cfSJeff Kirsher static void read_mac_address(struct xircom_private *card) 998a88394cfSJeff Kirsher { 999ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 1000a88394cfSJeff Kirsher unsigned long flags; 1001ebaf7f8fSFrancois Romieu u8 link; 1002a88394cfSJeff Kirsher int i; 1003a88394cfSJeff Kirsher 1004a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 1005a88394cfSJeff Kirsher 1006ebaf7f8fSFrancois Romieu xw32(CSR9, 1 << 12); /* enable boot rom access */ 1007a88394cfSJeff Kirsher for (i = 0x100; i < 0x1f7; i += link + 2) { 1008ebaf7f8fSFrancois Romieu u8 tuple, data_id, data_count; 1009ebaf7f8fSFrancois Romieu 1010ebaf7f8fSFrancois Romieu xw32(CSR10, i); 1011ebaf7f8fSFrancois Romieu tuple = xr32(CSR9); 1012ebaf7f8fSFrancois Romieu xw32(CSR10, i + 1); 1013ebaf7f8fSFrancois Romieu link = xr32(CSR9); 1014ebaf7f8fSFrancois Romieu xw32(CSR10, i + 2); 1015ebaf7f8fSFrancois Romieu data_id = xr32(CSR9); 1016ebaf7f8fSFrancois Romieu xw32(CSR10, i + 3); 1017ebaf7f8fSFrancois Romieu data_count = xr32(CSR9); 1018a88394cfSJeff Kirsher if ((tuple == 0x22) && (data_id == 0x04) && (data_count == 0x06)) { 1019ebaf7f8fSFrancois Romieu int j; 1020ebaf7f8fSFrancois Romieu 1021a88394cfSJeff Kirsher for (j = 0; j < 6; j++) { 1022ebaf7f8fSFrancois Romieu xw32(CSR10, i + j + 4); 1023ebaf7f8fSFrancois Romieu card->dev->dev_addr[j] = xr32(CSR9) & 0xff; 1024a88394cfSJeff Kirsher } 1025a88394cfSJeff Kirsher break; 1026a88394cfSJeff Kirsher } else if (link == 0) { 1027a88394cfSJeff Kirsher break; 1028a88394cfSJeff Kirsher } 1029a88394cfSJeff Kirsher } 1030a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1031a88394cfSJeff Kirsher pr_debug(" %pM\n", card->dev->dev_addr); 1032a88394cfSJeff Kirsher } 1033a88394cfSJeff Kirsher 1034a88394cfSJeff Kirsher 1035a88394cfSJeff Kirsher /* 1036a88394cfSJeff Kirsher transceiver_voodoo() enables the external UTP plug thingy. 1037a88394cfSJeff Kirsher it's called voodoo as I stole this code and cannot cross-reference 1038a88394cfSJeff Kirsher it with the specification. 1039a88394cfSJeff Kirsher */ 1040a88394cfSJeff Kirsher static void transceiver_voodoo(struct xircom_private *card) 1041a88394cfSJeff Kirsher { 1042ebaf7f8fSFrancois Romieu void __iomem *ioaddr = card->ioaddr; 1043a88394cfSJeff Kirsher unsigned long flags; 1044a88394cfSJeff Kirsher 1045a88394cfSJeff Kirsher /* disable all powermanagement */ 1046a88394cfSJeff Kirsher pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); 1047a88394cfSJeff Kirsher 1048a88394cfSJeff Kirsher setup_descriptors(card); 1049a88394cfSJeff Kirsher 1050a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 1051a88394cfSJeff Kirsher 1052ebaf7f8fSFrancois Romieu xw32(CSR15, 0x0008); 1053a88394cfSJeff Kirsher udelay(25); 1054ebaf7f8fSFrancois Romieu xw32(CSR15, 0xa8050000); 1055a88394cfSJeff Kirsher udelay(25); 1056ebaf7f8fSFrancois Romieu xw32(CSR15, 0xa00f0000); 1057a88394cfSJeff Kirsher udelay(25); 1058a88394cfSJeff Kirsher 1059a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1060a88394cfSJeff Kirsher 1061a88394cfSJeff Kirsher netif_start_queue(card->dev); 1062a88394cfSJeff Kirsher } 1063a88394cfSJeff Kirsher 1064a88394cfSJeff Kirsher 1065a88394cfSJeff Kirsher static void xircom_up(struct xircom_private *card) 1066a88394cfSJeff Kirsher { 1067a88394cfSJeff Kirsher unsigned long flags; 1068a88394cfSJeff Kirsher int i; 1069a88394cfSJeff Kirsher 1070a88394cfSJeff Kirsher /* disable all powermanagement */ 1071a88394cfSJeff Kirsher pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); 1072a88394cfSJeff Kirsher 1073a88394cfSJeff Kirsher setup_descriptors(card); 1074a88394cfSJeff Kirsher 1075a88394cfSJeff Kirsher spin_lock_irqsave(&card->lock, flags); 1076a88394cfSJeff Kirsher 1077a88394cfSJeff Kirsher 1078a88394cfSJeff Kirsher enable_link_interrupt(card); 1079a88394cfSJeff Kirsher enable_transmit_interrupt(card); 1080a88394cfSJeff Kirsher enable_receive_interrupt(card); 1081a88394cfSJeff Kirsher enable_common_interrupts(card); 1082a88394cfSJeff Kirsher enable_promisc(card); 1083a88394cfSJeff Kirsher 1084a88394cfSJeff Kirsher /* The card can have received packets already, read them away now */ 1085a88394cfSJeff Kirsher for (i=0;i<NUMDESCRIPTORS;i++) 1086a88394cfSJeff Kirsher investigate_read_descriptor(card->dev,card,i,bufferoffsets[i]); 1087a88394cfSJeff Kirsher 1088a88394cfSJeff Kirsher 1089a88394cfSJeff Kirsher spin_unlock_irqrestore(&card->lock, flags); 1090a88394cfSJeff Kirsher trigger_receive(card); 1091a88394cfSJeff Kirsher trigger_transmit(card); 1092a88394cfSJeff Kirsher netif_start_queue(card->dev); 1093a88394cfSJeff Kirsher } 1094a88394cfSJeff Kirsher 1095a88394cfSJeff Kirsher /* Bufferoffset is in BYTES */ 1096a88394cfSJeff Kirsher static void 1097a88394cfSJeff Kirsher investigate_read_descriptor(struct net_device *dev, struct xircom_private *card, 1098a88394cfSJeff Kirsher int descnr, unsigned int bufferoffset) 1099a88394cfSJeff Kirsher { 1100a88394cfSJeff Kirsher int status; 1101a88394cfSJeff Kirsher 1102a88394cfSJeff Kirsher status = le32_to_cpu(card->rx_buffer[4*descnr]); 1103a88394cfSJeff Kirsher 1104a88394cfSJeff Kirsher if (status > 0) { /* packet received */ 1105a88394cfSJeff Kirsher 1106a88394cfSJeff Kirsher /* TODO: discard error packets */ 1107a88394cfSJeff Kirsher 1108a88394cfSJeff Kirsher short pkt_len = ((status >> 16) & 0x7ff) - 4; 1109a88394cfSJeff Kirsher /* minus 4, we don't want the CRC */ 1110a88394cfSJeff Kirsher struct sk_buff *skb; 1111a88394cfSJeff Kirsher 1112a88394cfSJeff Kirsher if (pkt_len > 1518) { 1113a88394cfSJeff Kirsher netdev_err(dev, "Packet length %i is bogus\n", pkt_len); 1114a88394cfSJeff Kirsher pkt_len = 1518; 1115a88394cfSJeff Kirsher } 1116a88394cfSJeff Kirsher 111721a4e469SPradeep A Dalvi skb = netdev_alloc_skb(dev, pkt_len + 2); 1118a88394cfSJeff Kirsher if (skb == NULL) { 1119a88394cfSJeff Kirsher dev->stats.rx_dropped++; 1120a88394cfSJeff Kirsher goto out; 1121a88394cfSJeff Kirsher } 1122a88394cfSJeff Kirsher skb_reserve(skb, 2); 1123a88394cfSJeff Kirsher skb_copy_to_linear_data(skb, 1124a88394cfSJeff Kirsher &card->rx_buffer[bufferoffset / 4], 1125a88394cfSJeff Kirsher pkt_len); 1126a88394cfSJeff Kirsher skb_put(skb, pkt_len); 1127a88394cfSJeff Kirsher skb->protocol = eth_type_trans(skb, dev); 1128a88394cfSJeff Kirsher netif_rx(skb); 1129a88394cfSJeff Kirsher dev->stats.rx_packets++; 1130a88394cfSJeff Kirsher dev->stats.rx_bytes += pkt_len; 1131a88394cfSJeff Kirsher 1132a88394cfSJeff Kirsher out: 1133a88394cfSJeff Kirsher /* give the buffer back to the card */ 1134a88394cfSJeff Kirsher card->rx_buffer[4*descnr] = cpu_to_le32(0x80000000); 1135a88394cfSJeff Kirsher trigger_receive(card); 1136a88394cfSJeff Kirsher } 1137a88394cfSJeff Kirsher } 1138a88394cfSJeff Kirsher 1139a88394cfSJeff Kirsher 1140a88394cfSJeff Kirsher /* Bufferoffset is in BYTES */ 1141a88394cfSJeff Kirsher static void 1142a88394cfSJeff Kirsher investigate_write_descriptor(struct net_device *dev, 1143a88394cfSJeff Kirsher struct xircom_private *card, 1144a88394cfSJeff Kirsher int descnr, unsigned int bufferoffset) 1145a88394cfSJeff Kirsher { 1146a88394cfSJeff Kirsher int status; 1147a88394cfSJeff Kirsher 1148a88394cfSJeff Kirsher status = le32_to_cpu(card->tx_buffer[4*descnr]); 1149a88394cfSJeff Kirsher #if 0 1150a88394cfSJeff Kirsher if (status & 0x8000) { /* Major error */ 1151a88394cfSJeff Kirsher pr_err("Major transmit error status %x\n", status); 1152a88394cfSJeff Kirsher card->tx_buffer[4*descnr] = 0; 1153a88394cfSJeff Kirsher netif_wake_queue (dev); 1154a88394cfSJeff Kirsher } 1155a88394cfSJeff Kirsher #endif 1156a88394cfSJeff Kirsher if (status > 0) { /* bit 31 is 0 when done */ 1157a88394cfSJeff Kirsher if (card->tx_skb[descnr]!=NULL) { 1158a88394cfSJeff Kirsher dev->stats.tx_bytes += card->tx_skb[descnr]->len; 1159a88394cfSJeff Kirsher dev_kfree_skb_irq(card->tx_skb[descnr]); 1160a88394cfSJeff Kirsher } 1161a88394cfSJeff Kirsher card->tx_skb[descnr] = NULL; 1162a88394cfSJeff Kirsher /* Bit 8 in the status field is 1 if there was a collision */ 1163a88394cfSJeff Kirsher if (status & (1 << 8)) 1164a88394cfSJeff Kirsher dev->stats.collisions++; 1165a88394cfSJeff Kirsher card->tx_buffer[4*descnr] = 0; /* descriptor is free again */ 1166a88394cfSJeff Kirsher netif_wake_queue (dev); 1167a88394cfSJeff Kirsher dev->stats.tx_packets++; 1168a88394cfSJeff Kirsher } 1169a88394cfSJeff Kirsher } 1170a88394cfSJeff Kirsher 117131d60ebfSPeter Hüwe module_pci_driver(xircom_ops); 1172