diff options
Diffstat (limited to 'drivers/net/wireless/arlan-main.c')
| -rw-r--r-- | drivers/net/wireless/arlan-main.c | 1896 |
1 files changed, 1896 insertions, 0 deletions
diff --git a/drivers/net/wireless/arlan-main.c b/drivers/net/wireless/arlan-main.c new file mode 100644 index 000000000000..4f304c6e693a --- /dev/null +++ b/drivers/net/wireless/arlan-main.c @@ -0,0 +1,1896 @@ +/* + * Copyright (C) 1997 Cullen Jennings + * Copyright (C) 1998 Elmer Joandiu, elmer@ylenurme.ee + * GNU General Public License applies + * This module provides support for the Arlan 655 card made by Aironet + */ + +#include <linux/config.h> +#include "arlan.h" + +#if BITS_PER_LONG != 32 +# error FIXME: this driver requires a 32-bit platform +#endif + +static const char *arlan_version = "C.Jennigs 97 & Elmer.Joandi@ut.ee Oct'98, http://www.ylenurme.ee/~elmer/655/"; + +struct net_device *arlan_device[MAX_ARLANS]; + +static int SID = SIDUNKNOWN; +static int radioNodeId = radioNodeIdUNKNOWN; +static char encryptionKey[12] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'}; +int arlan_debug = debugUNKNOWN; +static int spreadingCode = spreadingCodeUNKNOWN; +static int channelNumber = channelNumberUNKNOWN; +static int channelSet = channelSetUNKNOWN; +static int systemId = systemIdUNKNOWN; +static int registrationMode = registrationModeUNKNOWN; +static int keyStart; +static int tx_delay_ms; +static int retries = 5; +static int tx_queue_len = 1; +static int arlan_EEPROM_bad; + +#ifdef ARLAN_DEBUGGING + +static int arlan_entry_debug; +static int arlan_exit_debug; +static int testMemory = testMemoryUNKNOWN; +static int irq = irqUNKNOWN; +static int txScrambled = 1; +static int mdebug; + +module_param(irq, int, 0); +module_param(mdebug, int, 0); +module_param(testMemory, int, 0); +module_param(arlan_entry_debug, int, 0); +module_param(arlan_exit_debug, int, 0); +module_param(txScrambled, int, 0); +MODULE_PARM_DESC(irq, "(unused)"); +MODULE_PARM_DESC(testMemory, "(unused)"); +MODULE_PARM_DESC(mdebug, "Arlan multicast debugging (0-1)"); +#endif + +module_param(arlan_debug, int, 0); +module_param(spreadingCode, int, 0); +module_param(channelNumber, int, 0); +module_param(channelSet, int, 0); +module_param(systemId, int, 0); +module_param(registrationMode, int, 0); +module_param(radioNodeId, int, 0); +module_param(SID, int, 0); +module_param(keyStart, int, 0); +module_param(tx_delay_ms, int, 0); +module_param(retries, int, 0); +module_param(tx_queue_len, int, 0); +module_param(arlan_EEPROM_bad, int, 0); +MODULE_PARM_DESC(arlan_debug, "Arlan debug enable (0-1)"); +MODULE_PARM_DESC(retries, "Arlan maximum packet retransmisions"); +#ifdef ARLAN_ENTRY_EXIT_DEBUGGING +MODULE_PARM_DESC(arlan_entry_debug, "Arlan driver function entry debugging"); +MODULE_PARM_DESC(arlan_exit_debug, "Arlan driver function exit debugging"); +MODULE_PARM_DESC(arlan_entry_and_exit_debug, "Arlan driver function entry and exit debugging"); +#else +MODULE_PARM_DESC(arlan_entry_debug, "(ignored)"); +MODULE_PARM_DESC(arlan_exit_debug, "(ignored)"); +MODULE_PARM_DESC(arlan_entry_and_exit_debug, "(ignored)"); +#endif + +struct arlan_conf_stru arlan_conf[MAX_ARLANS]; +static int arlans_found; + +static int arlan_open(struct net_device *dev); +static int arlan_tx(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static int arlan_close(struct net_device *dev); +static struct net_device_stats * + arlan_statistics (struct net_device *dev); +static void arlan_set_multicast (struct net_device *dev); +static int arlan_hw_tx (struct net_device* dev, char *buf, int length ); +static int arlan_hw_config (struct net_device * dev); +static void arlan_tx_done_interrupt (struct net_device * dev, int status); +static void arlan_rx_interrupt (struct net_device * dev, u_char rxStatus, u_short, u_short); +static void arlan_process_interrupt (struct net_device * dev); +static void arlan_tx_timeout (struct net_device *dev); + +static inline long us2ticks(int us) +{ + return us * (1000000 / HZ); +} + + +#ifdef ARLAN_ENTRY_EXIT_DEBUGGING +#define ARLAN_DEBUG_ENTRY(name) \ + {\ + struct timeval timev;\ + do_gettimeofday(&timev);\ + if (arlan_entry_debug || arlan_entry_and_exit_debug)\ + printk("--->>>" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec));\ + } +#define ARLAN_DEBUG_EXIT(name) \ + {\ + struct timeval timev;\ + do_gettimeofday(&timev);\ + if (arlan_exit_debug || arlan_entry_and_exit_debug)\ + printk("<<<---" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec) );\ + } +#else +#define ARLAN_DEBUG_ENTRY(name) +#define ARLAN_DEBUG_EXIT(name) +#endif + + +#define arlan_interrupt_ack(dev)\ + clearClearInterrupt(dev);\ + setClearInterrupt(dev); + +static inline int arlan_drop_tx(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + priv->stats.tx_errors++; + if (priv->Conf->tx_delay_ms) + { + priv->tx_done_delayed = jiffies + priv->Conf->tx_delay_ms * HZ / 1000 + 1; + } + else + { + priv->waiting_command_mask &= ~ARLAN_COMMAND_TX; + TXHEAD(dev).offset = 0; + TXTAIL(dev).offset = 0; + priv->txLast = 0; + priv->bad = 0; + if (!priv->under_reset && !priv->under_config) + netif_wake_queue (dev); + } + return 1; +} + + +int arlan_command(struct net_device *dev, int command_p) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + int udelayed = 0; + int i = 0; + unsigned long flags; + + ARLAN_DEBUG_ENTRY("arlan_command"); + + if (priv->card_polling_interval) + priv->card_polling_interval = 1; + + if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS) + printk(KERN_DEBUG "arlan_command, %lx commandByte %x waiting %lx incoming %x \n", + jiffies, READSHMB(arlan->commandByte), + priv->waiting_command_mask, command_p); + + priv->waiting_command_mask |= command_p; + + if (priv->waiting_command_mask & ARLAN_COMMAND_RESET) + if (time_after(jiffies, priv->lastReset + 5 * HZ)) + priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET; + + if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ACK) + { + arlan_interrupt_ack(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ACK; + } + if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ENABLE) + { + setInterruptEnable(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ENABLE; + } + + /* Card access serializing lock */ + spin_lock_irqsave(&priv->lock, flags); + + /* Check cards status and waiting */ + + if (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW)) + { + while (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW)) + { + if (READSHMB(arlan->resetFlag) || + READSHMB(arlan->commandByte)) /* || + (readControlRegister(dev) & ARLAN_ACCESS)) + */ + udelay(40); + else + priv->waiting_command_mask &= ~(ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW); + + udelayed++; + + if (priv->waiting_command_mask & ARLAN_COMMAND_LONG_WAIT_NOW) + { + if (udelayed * 40 > 1000000) + { + printk(KERN_ERR "%s long wait too long \n", dev->name); + priv->waiting_command_mask |= ARLAN_COMMAND_RESET; + break; + } + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_WAIT_NOW) + { + if (udelayed * 40 > 1000) + { + printk(KERN_ERR "%s short wait too long \n", dev->name); + goto bad_end; + } + } + } + } + else + { + i = 0; + while ((READSHMB(arlan->resetFlag) || + READSHMB(arlan->commandByte)) && + conf->pre_Command_Wait > (i++) * 10) + udelay(10); + + + if ((READSHMB(arlan->resetFlag) || + READSHMB(arlan->commandByte)) && + !(priv->waiting_command_mask & ARLAN_COMMAND_RESET)) + { + goto card_busy_end; + } + } + if (priv->waiting_command_mask & ARLAN_COMMAND_RESET) + priv->under_reset = 1; + if (priv->waiting_command_mask & ARLAN_COMMAND_CONF) + priv->under_config = 1; + + /* Issuing command */ + arlan_lock_card_access(dev); + if (priv->waiting_command_mask & ARLAN_COMMAND_POWERUP) + { + // if (readControlRegister(dev) & (ARLAN_ACCESS && ARLAN_POWER)) + setPowerOn(dev); + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERUP; + priv->waiting_command_mask |= ARLAN_COMMAND_RESET; + priv->card_polling_interval = HZ / 10; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_ACTIVATE) + { + WRITESHMB(arlan->commandByte, ARLAN_COM_ACTIVATE); + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_ACTIVATE; + priv->card_polling_interval = HZ / 10; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_RX_ABORT) + { + if (priv->rx_command_given) + { + WRITESHMB(arlan->commandByte, ARLAN_COM_RX_ABORT); + arlan_interrupt_lancpu(dev); + priv->rx_command_given = 0; + } + priv->waiting_command_mask &= ~ARLAN_COMMAND_RX_ABORT; + priv->card_polling_interval = 1; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_TX_ABORT) + { + if (priv->tx_command_given) + { + WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ABORT); + arlan_interrupt_lancpu(dev); + priv->tx_command_given = 0; + } + priv->waiting_command_mask &= ~ARLAN_COMMAND_TX_ABORT; + priv->card_polling_interval = 1; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_RESET) + { + priv->under_reset=1; + netif_stop_queue (dev); + + arlan_drop_tx(dev); + if (priv->tx_command_given || priv->rx_command_given) + { + printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name); + } + netif_stop_queue (dev); + if (arlan_debug & ARLAN_DEBUG_RESET) + printk(KERN_ERR "%s: Doing chip reset\n", dev->name); + priv->lastReset = jiffies; + WRITESHM(arlan->commandByte, 0, u_char); + /* hold card in reset state */ + setHardwareReset(dev); + /* set reset flag and then release reset */ + WRITESHM(arlan->resetFlag, 0xff, u_char); + clearChannelAttention(dev); + clearHardwareReset(dev); + priv->card_polling_interval = HZ / 4; + priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET; + priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK; +// priv->waiting_command_mask |= ARLAN_COMMAND_INT_RENABLE; +// priv->waiting_command_mask |= ARLAN_COMMAND_RX; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RACK) + { + clearHardwareReset(dev); + clearClearInterrupt(dev); + setClearInterrupt(dev); + setInterruptEnable(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RACK; + priv->waiting_command_mask |= ARLAN_COMMAND_CONF; + priv->under_config = 1; + priv->under_reset = 0; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RENABLE) + { + setInterruptEnable(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RENABLE; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF) + { + if (priv->tx_command_given || priv->rx_command_given) + { + printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name); + } + arlan_drop_tx(dev); + setInterruptEnable(dev); + arlan_hw_config(dev); + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF; + priv->card_polling_interval = HZ / 10; +// priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK; +// priv->waiting_command_mask |= ARLAN_COMMAND_INT_ENABLE; + priv->waiting_command_mask |= ARLAN_COMMAND_CONF_WAIT; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF_WAIT) + { + if (READSHMB(arlan->configuredStatusFlag) != 0 && + READSHMB(arlan->diagnosticInfo) == 0xff) + { + priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF_WAIT; + priv->waiting_command_mask |= ARLAN_COMMAND_RX; + priv->waiting_command_mask |= ARLAN_COMMAND_TBUSY_CLEAR; + priv->card_polling_interval = HZ / 10; + priv->tx_command_given = 0; + priv->under_config = 0; + } + else + { + priv->card_polling_interval = 1; + if (arlan_debug & ARLAN_DEBUG_TIMING) + printk(KERN_ERR "configure delayed \n"); + } + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_RX) + { + if (!registrationBad(dev)) + { + setInterruptEnable(dev); + memset_io(arlan->commandParameter, 0, 0xf); + WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_RX_ENABLE); + WRITESHMB(arlan->commandParameter[0], conf->rxParameter); + arlan_interrupt_lancpu(dev); + priv->rx_command_given = 0; // mnjah, bad + priv->waiting_command_mask &= ~ARLAN_COMMAND_RX; + priv->card_polling_interval = 1; + } + else + priv->card_polling_interval = 2; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_TBUSY_CLEAR) + { + if ( !registrationBad(dev) && + (netif_queue_stopped(dev) || !netif_running(dev)) ) + { + priv->waiting_command_mask &= ~ARLAN_COMMAND_TBUSY_CLEAR; + netif_wake_queue (dev); + } + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_TX) + { + if (!test_and_set_bit(0, (void *) &priv->tx_command_given)) + { + if (time_after(jiffies, + priv->tx_last_sent + us2ticks(conf->rx_tweak1)) + || time_before(jiffies, + priv->last_rx_int_ack_time + us2ticks(conf->rx_tweak2))) + { + setInterruptEnable(dev); + memset_io(arlan->commandParameter, 0, 0xf); + WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ENABLE | ARLAN_COM_INT); + memcpy_toio(arlan->commandParameter, &TXLAST(dev), 14); +// for ( i=1 ; i < 15 ; i++) printk("%02x:",READSHMB(arlan->commandParameter[i])); + priv->tx_last_sent = jiffies; + arlan_interrupt_lancpu(dev); + priv->tx_command_given = 1; + priv->waiting_command_mask &= ~ARLAN_COMMAND_TX; + priv->card_polling_interval = 1; + } + else + { + priv->tx_command_given = 0; + priv->card_polling_interval = 1; + } + } + else if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS) + printk(KERN_ERR "tx command when tx chain locked \n"); + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOPINT) + { + { + WRITESHMB(arlan->commandByte, ARLAN_COM_NOP | ARLAN_COM_INT); + } + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOPINT; + priv->card_polling_interval = HZ / 3; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOP) + { + WRITESHMB(arlan->commandByte, ARLAN_COM_NOP); + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOP; + priv->card_polling_interval = HZ / 3; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_SLOW_POLL) + { + WRITESHMB(arlan->commandByte, ARLAN_COM_GOTO_SLOW_POLL); + arlan_interrupt_lancpu(dev); + priv->waiting_command_mask &= ~ARLAN_COMMAND_SLOW_POLL; + priv->card_polling_interval = HZ / 3; + } + else if (priv->waiting_command_mask & ARLAN_COMMAND_POWERDOWN) + { + setPowerOff(dev); + if (arlan_debug & ARLAN_DEBUG_CARD_STATE) + printk(KERN_WARNING "%s: Arlan Going Standby\n", dev->name); + priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERDOWN; + priv->card_polling_interval = 3 * HZ; + } + arlan_unlock_card_access(dev); + for (i = 0; READSHMB(arlan->commandByte) && i < 20; i++) + udelay(10); + if (READSHMB(arlan->commandByte)) + if (arlan_debug & ARLAN_DEBUG_CARD_STATE) + printk(KERN_ERR "card busy leaving command %lx\n", priv->waiting_command_mask); + + spin_unlock_irqrestore(&priv->lock, flags); + ARLAN_DEBUG_EXIT("arlan_command"); + priv->last_command_buff_free_time = jiffies; + return 0; + +card_busy_end: + if (time_after(jiffies, priv->last_command_buff_free_time + HZ)) + priv->waiting_command_mask |= ARLAN_COMMAND_CLEAN_AND_RESET; + + if (arlan_debug & ARLAN_DEBUG_CARD_STATE) + printk(KERN_ERR "%s arlan_command card busy end \n", dev->name); + spin_unlock_irqrestore(&priv->lock, flags); + ARLAN_DEBUG_EXIT("arlan_command"); + return 1; + +bad_end: + printk(KERN_ERR "%s arlan_command bad end \n", dev->name); + + spin_unlock_irqrestore(&priv->lock, flags); + ARLAN_DEBUG_EXIT("arlan_command"); + + return -1; +} + +static inline void arlan_command_process(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + int times = 0; + while (priv->waiting_command_mask && times < 8) + { + if (priv->waiting_command_mask) + { + if (arlan_command(dev, 0)) + break; + times++; + } + /* if long command, we won't repeat trying */ ; + if (priv->card_polling_interval > 1) + break; + times++; + } +} + + +static inline void arlan_retransmit_now(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + + ARLAN_DEBUG_ENTRY("arlan_retransmit_now"); + if (TXLAST(dev).offset == 0) + { + if (TXHEAD(dev).offset) + { + priv->txLast = 0; + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to head \n"); + + } + else if (TXTAIL(dev).offset) + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to tail \n"); + priv->txLast = 1; + } + else + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "ReTransmit buff empty"); + netif_wake_queue (dev); + return; + + } + arlan_command(dev, ARLAN_COMMAND_TX); + + priv->Conf->driverRetransmissions++; + priv->retransmissions++; + + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("Retransmit %d bytes \n", TXLAST(dev).length); + + ARLAN_DEBUG_EXIT("arlan_retransmit_now"); +} + + + +static void arlan_registration_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *) data; + struct arlan_private *priv = netdev_priv(dev); + int bh_mark_needed = 0; + int next_tick = 1; + long lostTime = ((long)jiffies - (long)priv->registrationLastSeen) + * (1000/HZ); + + if (registrationBad(dev)) + { + priv->registrationLostCount++; + if (lostTime > 7000 && lostTime < 7200) + { + printk(KERN_NOTICE "%s registration Lost \n", dev->name); + } + if (lostTime / priv->reRegisterExp > 2000) + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF); + if (lostTime / (priv->reRegisterExp) > 3500) + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET); + if (priv->reRegisterExp < 400) + priv->reRegisterExp += 2; + if (lostTime > 7200) + { + next_tick = HZ; + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET); + } + } + else + { + if (priv->Conf->registrationMode && lostTime > 10000 && + priv->registrationLostCount) + { + printk(KERN_NOTICE "%s registration is back after %ld milliseconds\n", + dev->name, lostTime); + } + priv->registrationLastSeen = jiffies; + priv->registrationLostCount = 0; + priv->reRegisterExp = 1; + if (!netif_running(dev) ) + netif_wake_queue(dev); + if (time_after(priv->tx_last_sent,priv->tx_last_cleared) && + time_after(jiffies, priv->tx_last_sent * 5*HZ) ){ + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET); + priv->tx_last_cleared = jiffies; + } + } + + + if (!registrationBad(dev) && priv->ReTransmitRequested) + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk(KERN_ERR "Retransmit from timer \n"); + priv->ReTransmitRequested = 0; + arlan_retransmit_now(dev); + } + if (!registrationBad(dev) && + time_after(jiffies, priv->tx_done_delayed) && + priv->tx_done_delayed != 0) + { + TXLAST(dev).offset = 0; + if (priv->txLast) + priv->txLast = 0; + else if (TXTAIL(dev).offset) + priv->txLast = 1; + if (TXLAST(dev).offset) + { + arlan_retransmit_now(dev); + dev->trans_start = jiffies; + } + if (!(TXHEAD(dev).offset && TXTAIL(dev).offset)) + { + netif_wake_queue (dev); + } + priv->tx_done_delayed = 0; + bh_mark_needed = 1; + } + if (bh_mark_needed) + { + netif_wake_queue (dev); + } + arlan_process_interrupt(dev); + + if (next_tick < priv->card_polling_interval) + next_tick = priv->card_polling_interval; + + priv->timer.expires = jiffies + next_tick; + + add_timer(&priv->timer); +} + + +#ifdef ARLAN_DEBUGGING + +static void arlan_print_registers(struct net_device *dev, int line) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem *arlan = priv->card; + + u_char hostcpuLock, lancpuLock, controlRegister, cntrlRegImage, + txStatus, rxStatus, interruptInProgress, commandByte; + + + ARLAN_DEBUG_ENTRY("arlan_print_registers"); + READSHM(interruptInProgress, arlan->interruptInProgress, u_char); + READSHM(hostcpuLock, arlan->hostcpuLock, u_char); + READSHM(lancpuLock, arlan->lancpuLock, u_char); + READSHM(controlRegister, arlan->controlRegister, u_char); + READSHM(cntrlRegImage, arlan->cntrlRegImage, u_char); + READSHM(txStatus, arlan->txStatus, u_char); + READSHM(rxStatus, arlan->rxStatus, u_char); + READSHM(commandByte, arlan->commandByte, u_char); + + printk(KERN_WARNING "line %04d IP %02x HL %02x LL %02x CB %02x CR %02x CRI %02x TX %02x RX %02x\n", + line, interruptInProgress, hostcpuLock, lancpuLock, commandByte, + controlRegister, cntrlRegImage, txStatus, rxStatus); + + ARLAN_DEBUG_EXIT("arlan_print_registers"); +} +#endif + + +static int arlan_hw_tx(struct net_device *dev, char *buf, int length) +{ + int i; + + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + + int tailStarts = 0x800; + int headEnds = 0x0; + + + ARLAN_DEBUG_ENTRY("arlan_hw_tx"); + if (TXHEAD(dev).offset) + headEnds = (((TXHEAD(dev).offset + TXHEAD(dev).length - offsetof(struct arlan_shmem, txBuffer)) / 64) + 1) * 64; + if (TXTAIL(dev).offset) + tailStarts = 0x800 - (((TXTAIL(dev).offset - offsetof(struct arlan_shmem, txBuffer)) / 64) + 2) * 64; + + + if (!TXHEAD(dev).offset && length < tailStarts) + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk(KERN_ERR "TXHEAD insert, tailStart %d\n", tailStarts); + + TXHEAD(dev).offset = + offsetof(struct arlan_shmem, txBuffer); + TXHEAD(dev).length = length - ARLAN_FAKE_HDR_LEN; + for (i = 0; i < 6; i++) + TXHEAD(dev).dest[i] = buf[i]; + TXHEAD(dev).clear = conf->txClear; + TXHEAD(dev).retries = conf->txRetries; /* 0 is use default */ + TXHEAD(dev).routing = conf->txRouting; + TXHEAD(dev).scrambled = conf->txScrambled; + memcpy_toio((char __iomem *)arlan + TXHEAD(dev).offset, buf + ARLAN_FAKE_HDR_LEN, TXHEAD(dev).length); + } + else if (!TXTAIL(dev).offset && length < (0x800 - headEnds)) + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk(KERN_ERR "TXTAIL insert, headEnd %d\n", headEnds); + + TXTAIL(dev).offset = + offsetof(struct arlan_shmem, txBuffer) + 0x800 - (length / 64 + 2) * 64; + TXTAIL(dev).length = length - ARLAN_FAKE_HDR_LEN; + for (i = 0; i < 6; i++) + TXTAIL(dev).dest[i] = buf[i]; + TXTAIL(dev).clear = conf->txClear; + TXTAIL(dev).retries = conf->txRetries; + TXTAIL(dev).routing = conf->txRouting; + TXTAIL(dev).scrambled = conf->txScrambled; + memcpy_toio(((char __iomem *)arlan + TXTAIL(dev).offset), buf + ARLAN_FAKE_HDR_LEN, TXTAIL(dev).length); + } + else + { + netif_stop_queue (dev); + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk(KERN_ERR "TX TAIL & HEAD full, return, tailStart %d headEnd %d\n", tailStarts, headEnds); + return -1; + } + priv->out_bytes += length; + priv->out_bytes10 += length; + if (conf->measure_rate < 1) + conf->measure_rate = 1; + if (time_after(jiffies, priv->out_time + conf->measure_rate * HZ)) + { + conf->out_speed = priv->out_bytes / conf->measure_rate; + priv->out_bytes = 0; + priv->out_time = jiffies; + } + if (time_after(jiffies, priv->out_time10 + conf->measure_rate * 10*HZ)) + { + conf->out_speed10 = priv->out_bytes10 / (10 * conf->measure_rate); + priv->out_bytes10 = 0; + priv->out_time10 = jiffies; + } + if (TXHEAD(dev).offset && TXTAIL(dev).offset) + { + netif_stop_queue (dev); + return 0; + } + else + netif_start_queue (dev); + + + IFDEBUG(ARLAN_DEBUG_HEADER_DUMP) + printk(KERN_WARNING "%s Transmit t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name, + (unsigned char) buf[0], (unsigned char) buf[1], (unsigned char) buf[2], (unsigned char) buf[3], + (unsigned char) buf[4], (unsigned char) buf[5], (unsigned char) buf[6], (unsigned char) buf[7], + (unsigned char) buf[8], (unsigned char) buf[9], (unsigned char) buf[10], (unsigned char) buf[11]); + + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "TX command prepare for buffer %d\n", priv->txLast); + + arlan_command(dev, ARLAN_COMMAND_TX); + + priv->tx_last_sent = jiffies; + + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("%s TX Qued %d bytes \n", dev->name, length); + + ARLAN_DEBUG_EXIT("arlan_hw_tx"); + + return 0; +} + + +static int arlan_hw_config(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + + ARLAN_DEBUG_ENTRY("arlan_hw_config"); + + printk(KERN_NOTICE "%s arlan configure called \n", dev->name); + if (arlan_EEPROM_bad) + printk(KERN_NOTICE "arlan configure with eeprom bad option \n"); + + + WRITESHM(arlan->spreadingCode, conf->spreadingCode, u_char); + WRITESHM(arlan->channelSet, conf->channelSet, u_char); + + if (arlan_EEPROM_bad) + WRITESHM(arlan->defaultChannelSet, conf->channelSet, u_char); + + WRITESHM(arlan->channelNumber, conf->channelNumber, u_char); + + WRITESHM(arlan->scramblingDisable, conf->scramblingDisable, u_char); + WRITESHM(arlan->txAttenuation, conf->txAttenuation, u_char); + + WRITESHM(arlan->systemId, conf->systemId, u_int); + + WRITESHM(arlan->maxRetries, conf->maxRetries, u_char); + WRITESHM(arlan->receiveMode, conf->receiveMode, u_char); + WRITESHM(arlan->priority, conf->priority, u_char); + WRITESHM(arlan->rootOrRepeater, conf->rootOrRepeater, u_char); + WRITESHM(arlan->SID, conf->SID, u_int); + + WRITESHM(arlan->registrationMode, conf->registrationMode, u_char); + + WRITESHM(arlan->registrationFill, conf->registrationFill, u_char); + WRITESHM(arlan->localTalkAddress, conf->localTalkAddress, u_char); + WRITESHM(arlan->codeFormat, conf->codeFormat, u_char); + WRITESHM(arlan->numChannels, conf->numChannels, u_char); + WRITESHM(arlan->channel1, conf->channel1, u_char); + WRITESHM(arlan->channel2, conf->channel2, u_char); + WRITESHM(arlan->channel3, conf->channel3, u_char); + WRITESHM(arlan->channel4, conf->channel4, u_char); + WRITESHM(arlan->radioNodeId, conf->radioNodeId, u_short); + WRITESHM(arlan->SID, conf->SID, u_int); + WRITESHM(arlan->waitTime, conf->waitTime, u_short); + WRITESHM(arlan->lParameter, conf->lParameter, u_short); + memcpy_toio(&(arlan->_15), &(conf->_15), 3); + WRITESHM(arlan->_15, conf->_15, u_short); + WRITESHM(arlan->headerSize, conf->headerSize, u_short); + if (arlan_EEPROM_bad) + WRITESHM(arlan->hardwareType, conf->hardwareType, u_char); + WRITESHM(arlan->radioType, conf->radioType, u_char); + if (arlan_EEPROM_bad) + WRITESHM(arlan->radioModule, conf->radioType, u_char); + + memcpy_toio(arlan->encryptionKey + keyStart, encryptionKey, 8); + memcpy_toio(arlan->name, conf->siteName, 16); + + WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_CONF); /* do configure */ + memset_io(arlan->commandParameter, 0, 0xf); /* 0xf */ + memset_io(arlan->commandParameter + 1, 0, 2); + if (conf->writeEEPROM) + { + memset_io(arlan->commandParameter, conf->writeEEPROM, 1); +// conf->writeEEPROM=0; + } + if (conf->registrationMode && conf->registrationInterrupts) + memset_io(arlan->commandParameter + 3, 1, 1); + else + memset_io(arlan->commandParameter + 3, 0, 1); + + priv->irq_test_done = 0; + + if (conf->tx_queue_len) + dev->tx_queue_len = conf->tx_queue_len; + udelay(100); + + ARLAN_DEBUG_EXIT("arlan_hw_config"); + return 0; +} + + +static int arlan_read_card_configuration(struct net_device *dev) +{ + u_char tlx415; + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + + ARLAN_DEBUG_ENTRY("arlan_read_card_configuration"); + + if (radioNodeId == radioNodeIdUNKNOWN) + { + READSHM(conf->radioNodeId, arlan->radioNodeId, u_short); + } + else + conf->radioNodeId = radioNodeId; + + if (SID == SIDUNKNOWN) + { + READSHM(conf->SID, arlan->SID, u_int); + } + else conf->SID = SID; + + if (spreadingCode == spreadingCodeUNKNOWN) + { + READSHM(conf->spreadingCode, arlan->spreadingCode, u_char); + } + else + conf->spreadingCode = spreadingCode; + + if (channelSet == channelSetUNKNOWN) + { + READSHM(conf->channelSet, arlan->channelSet, u_char); + } + else conf->channelSet = channelSet; + + if (channelNumber == channelNumberUNKNOWN) + { + READSHM(conf->channelNumber, arlan->channelNumber, u_char); + } + else conf->channelNumber = channelNumber; + + READSHM(conf->scramblingDisable, arlan->scramblingDisable, u_char); + READSHM(conf->txAttenuation, arlan->txAttenuation, u_char); + + if (systemId == systemIdUNKNOWN) + { + READSHM(conf->systemId, arlan->systemId, u_int); + } + else conf->systemId = systemId; + + READSHM(conf->maxDatagramSize, arlan->maxDatagramSize, u_short); + READSHM(conf->maxFrameSize, arlan->maxFrameSize, u_short); + READSHM(conf->maxRetries, arlan->maxRetries, u_char); + READSHM(conf->receiveMode, arlan->receiveMode, u_char); + READSHM(conf->priority, arlan->priority, u_char); + READSHM(conf->rootOrRepeater, arlan->rootOrRepeater, u_char); + + if (SID == SIDUNKNOWN) + { + READSHM(conf->SID, arlan->SID, u_int); + } + else conf->SID = SID; + + if (registrationMode == registrationModeUNKNOWN) + { + READSHM(conf->registrationMode, arlan->registrationMode, u_char); + } + else conf->registrationMode = registrationMode; + + READSHM(conf->registrationFill, arlan->registrationFill, u_char); + READSHM(conf->localTalkAddress, arlan->localTalkAddress, u_char); + READSHM(conf->codeFormat, arlan->codeFormat, u_char); + READSHM(conf->numChannels, arlan->numChannels, u_char); + READSHM(conf->channel1, arlan->channel1, u_char); + READSHM(conf->channel2, arlan->channel2, u_char); + READSHM(conf->channel3, arlan->channel3, u_char); + READSHM(conf->channel4, arlan->channel4, u_char); + READSHM(conf->waitTime, arlan->waitTime, u_short); + READSHM(conf->lParameter, arlan->lParameter, u_short); + READSHM(conf->_15, arlan->_15, u_short); + READSHM(conf->headerSize, arlan->headerSize, u_short); + READSHM(conf->hardwareType, arlan->hardwareType, u_char); + READSHM(conf->radioType, arlan->radioModule, u_char); + + if (conf->radioType == 0) + conf->radioType = 0xc; + + WRITESHM(arlan->configStatus, 0xA5, u_char); + READSHM(tlx415, arlan->configStatus, u_char); + + if (tlx415 != 0xA5) + printk(KERN_INFO "%s tlx415 chip \n", dev->name); + + conf->txClear = 0; + conf->txRetries = 1; + conf->txRouting = 1; + conf->txScrambled = 0; + conf->rxParameter = 1; + conf->txTimeoutMs = 4000; + conf->waitCardTimeout = 100000; + conf->receiveMode = ARLAN_RCV_CLEAN; + memcpy_fromio(conf->siteName, arlan->name, 16); + conf->siteName[16] = '\0'; + conf->retries = retries; + conf->tx_delay_ms = tx_delay_ms; + conf->ReTransmitPacketMaxSize = 200; + conf->waitReTransmitPacketMaxSize = 200; + conf->txAckTimeoutMs = 900; + conf->fastReTransCount = 3; + + ARLAN_DEBUG_EXIT("arlan_read_card_configuration"); + + return 0; +} + + +static int lastFoundAt = 0xbe000; + + +/* + * This is the real probe routine. Linux has a history of friendly device + * probes on the ISA bus. A good device probes avoids doing writes, and + * verifies that the correct device exists and functions. + */ +#define ARLAN_SHMEM_SIZE 0x2000 +static int __init arlan_check_fingerprint(unsigned long memaddr) +{ + static const char probeText[] = "TELESYSTEM SLW INC. ARLAN \0"; + volatile struct arlan_shmem __iomem *arlan = (struct arlan_shmem *) memaddr; + unsigned long paddr = virt_to_phys((void *) memaddr); + char tempBuf[49]; + + ARLAN_DEBUG_ENTRY("arlan_check_fingerprint"); + + if (!request_mem_region(paddr, ARLAN_SHMEM_SIZE, "arlan")) { + // printk(KERN_WARNING "arlan: memory region %lx excluded from probing \n",paddr); + return -ENODEV; + } + + memcpy_fromio(tempBuf, arlan->textRegion, 29); + tempBuf[30] = 0; + + /* check for card at this address */ + if (0 != strncmp(tempBuf, probeText, 29)){ + release_mem_region(paddr, ARLAN_SHMEM_SIZE); + return -ENODEV; + } + +// printk(KERN_INFO "arlan found at 0x%x \n",memaddr); + ARLAN_DEBUG_EXIT("arlan_check_fingerprint"); + + return 0; +} + +static int arlan_change_mtu(struct net_device *dev, int new_mtu) +{ + struct arlan_private *priv = netdev_priv(dev); + struct arlan_conf_stru *conf = priv->Conf; + + ARLAN_DEBUG_ENTRY("arlan_change_mtu"); + if (new_mtu > 2032) + return -EINVAL; + dev->mtu = new_mtu; + if (new_mtu < 256) + new_mtu = 256; /* cards book suggests 1600 */ + conf->maxDatagramSize = new_mtu; + conf->maxFrameSize = new_mtu + 48; + + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF); + printk(KERN_NOTICE "%s mtu changed to %d \n", dev->name, new_mtu); + + ARLAN_DEBUG_EXIT("arlan_change_mtu"); + + return 0; +} + +static int arlan_mac_addr(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + + + ARLAN_DEBUG_ENTRY("arlan_mac_addr"); + return -EINVAL; + + if (!netif_running(dev)) + return -EBUSY; + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + ARLAN_DEBUG_EXIT("arlan_mac_addr"); + return 0; +} + + + +static int __init arlan_setup_device(struct net_device *dev, int num) +{ + struct arlan_private *ap = netdev_priv(dev); + int err; + + ARLAN_DEBUG_ENTRY("arlan_setup_device"); + + ap->conf = (struct arlan_shmem *)(ap+1); + + dev->tx_queue_len = tx_queue_len; + dev->open = arlan_open; + dev->stop = arlan_close; + dev->hard_start_xmit = arlan_tx; + dev->get_stats = arlan_statistics; + dev->set_multicast_list = arlan_set_multicast; + dev->change_mtu = arlan_change_mtu; + dev->set_mac_address = arlan_mac_addr; + dev->tx_timeout = arlan_tx_timeout; + dev->watchdog_timeo = 3*HZ; + + ap->irq_test_done = 0; + ap->Conf = &arlan_conf[num]; + + ap->Conf->pre_Command_Wait = 40; + ap->Conf->rx_tweak1 = 30; + ap->Conf->rx_tweak2 = 0; + + + err = register_netdev(dev); + if (err) { + release_mem_region(virt_to_phys((void *) dev->mem_start), + ARLAN_SHMEM_SIZE); + free_netdev(dev); + return err; + } + arlan_device[num] = dev; + ARLAN_DEBUG_EXIT("arlan_setup_device"); + return 0; +} + +static int __init arlan_probe_here(struct net_device *dev, + unsigned long memaddr) +{ + struct arlan_private *ap = netdev_priv(dev); + + ARLAN_DEBUG_ENTRY("arlan_probe_here"); + + if (arlan_check_fingerprint(memaddr)) + return -ENODEV; + + printk(KERN_NOTICE "%s: Arlan found at %x, \n ", dev->name, + (int) virt_to_phys((void*)memaddr)); + + ap->card = (void *) memaddr; + dev->mem_start = memaddr; + dev->mem_end = memaddr + ARLAN_SHMEM_SIZE-1; + + if (dev->irq < 2) + { + READSHM(dev->irq, ap->card->irqLevel, u_char); + } else if (dev->irq == 2) + dev->irq = 9; + + arlan_read_card_configuration(dev); + + ARLAN_DEBUG_EXIT("arlan_probe_here"); + return 0; +} + + +static int arlan_open(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + int ret = 0; + + ARLAN_DEBUG_ENTRY("arlan_open"); + + ret = request_irq(dev->irq, &arlan_interrupt, 0, dev->name, dev); + if (ret) + { + printk(KERN_ERR "%s: unable to get IRQ %d .\n", + dev->name, dev->irq); + return ret; + } + + + priv->bad = 0; + priv->lastReset = 0; + priv->reset = 0; + memcpy_fromio(dev->dev_addr, arlan->lanCardNodeId, 6); + memset(dev->broadcast, 0xff, 6); + dev->tx_queue_len = tx_queue_len; + priv->interrupt_processing_active = 0; + spin_lock_init(&priv->lock); + + netif_start_queue (dev); + + priv->registrationLostCount = 0; + priv->registrationLastSeen = jiffies; + priv->txLast = 0; + priv->tx_command_given = 0; + priv->rx_command_given = 0; + + priv->reRegisterExp = 1; + priv->tx_last_sent = jiffies - 1; + priv->tx_last_cleared = jiffies; + priv->Conf->writeEEPROM = 0; + priv->Conf->registrationInterrupts = 1; + + init_timer(&priv->timer); + priv->timer.expires = jiffies + HZ / 10; + priv->timer.data = (unsigned long) dev; + priv->timer.function = &arlan_registration_timer; /* timer handler */ + + arlan_command(dev, ARLAN_COMMAND_POWERUP | ARLAN_COMMAND_LONG_WAIT_NOW); + mdelay(200); + add_timer(&priv->timer); + + ARLAN_DEBUG_EXIT("arlan_open"); + return 0; +} + + +static void arlan_tx_timeout (struct net_device *dev) +{ + printk(KERN_ERR "%s: arlan transmit timed out, kernel decided\n", dev->name); + /* Try to restart the adaptor. */ + arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET); + // dev->trans_start = jiffies; + // netif_start_queue (dev); +} + + +static int arlan_tx(struct sk_buff *skb, struct net_device *dev) +{ + short length; + unsigned char *buf; + + ARLAN_DEBUG_ENTRY("arlan_tx"); + + length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; + buf = skb->data; + + if (length + 0x12 > 0x800) { + printk(KERN_ERR "TX RING overflow \n"); + netif_stop_queue (dev); + } + + if (arlan_hw_tx(dev, buf, length) == -1) + goto bad_end; + + dev->trans_start = jiffies; + + dev_kfree_skb(skb); + + arlan_process_interrupt(dev); + ARLAN_DEBUG_EXIT("arlan_tx"); + return 0; + +bad_end: + arlan_process_interrupt(dev); + netif_stop_queue (dev); + ARLAN_DEBUG_EXIT("arlan_tx"); + return 1; +} + + +static inline int DoNotReTransmitCrap(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + if (TXLAST(dev).length < priv->Conf->ReTransmitPacketMaxSize) + return 1; + return 0; + +} + +static inline int DoNotWaitReTransmitCrap(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + if (TXLAST(dev).length < priv->Conf->waitReTransmitPacketMaxSize) + return 1; + return 0; +} + +static inline void arlan_queue_retransmit(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + ARLAN_DEBUG_ENTRY("arlan_queue_retransmit"); + + if (DoNotWaitReTransmitCrap(dev)) + { + arlan_drop_tx(dev); + } else + priv->ReTransmitRequested++; + + ARLAN_DEBUG_EXIT("arlan_queue_retransmit"); +} + +static inline void RetryOrFail(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + ARLAN_DEBUG_ENTRY("RetryOrFail"); + + if (priv->retransmissions > priv->Conf->retries || + DoNotReTransmitCrap(dev)) + { + arlan_drop_tx(dev); + } + else if (priv->bad <= priv->Conf->fastReTransCount) + { + arlan_retransmit_now(dev); + } + else arlan_queue_retransmit(dev); + + ARLAN_DEBUG_EXIT("RetryOrFail"); +} + + +static void arlan_tx_done_interrupt(struct net_device *dev, int status) +{ + struct arlan_private *priv = netdev_priv(dev); + + ARLAN_DEBUG_ENTRY("arlan_tx_done_interrupt"); + + priv->tx_last_cleared = jiffies; + priv->tx_command_given = 0; + switch (status) + { + case 1: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit OK\n"); + priv->stats.tx_packets++; + priv->bad = 0; + priv->reset = 0; + priv->retransmissions = 0; + if (priv->Conf->tx_delay_ms) + { + priv->tx_done_delayed = jiffies + (priv->Conf->tx_delay_ms * HZ) / 1000 + 1; + } + else + { + TXLAST(dev).offset = 0; + if (priv->txLast) + priv->txLast = 0; + else if (TXTAIL(dev).offset) + priv->txLast = 1; + if (TXLAST(dev).offset) + { + arlan_retransmit_now(dev); + dev->trans_start = jiffies; + } + if (!TXHEAD(dev).offset || !TXTAIL(dev).offset) + { + netif_wake_queue (dev); + } + } + } + break; + + case 2: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit timed out\n"); + priv->bad += 1; + //arlan_queue_retransmit(dev); + RetryOrFail(dev); + } + break; + + case 3: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit max retries\n"); + priv->bad += 1; + priv->reset = 0; + //arlan_queue_retransmit(dev); + RetryOrFail(dev); + } + break; + + case 4: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit aborted\n"); + priv->bad += 1; + arlan_queue_retransmit(dev); + //RetryOrFail(dev); + } + break; + + case 5: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit not registered\n"); + priv->bad += 1; + //debug=101; + arlan_queue_retransmit(dev); + } + break; + + case 6: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit destination full\n"); + priv->bad += 1; + priv->reset = 0; + //arlan_drop_tx(dev); + arlan_queue_retransmit(dev); + } + break; + + case 7: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit unknown ack\n"); + priv->bad += 1; + priv->reset = 0; + arlan_queue_retransmit(dev); + } + break; + + case 8: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit dest mail box full\n"); + priv->bad += 1; + priv->reset = 0; + //arlan_drop_tx(dev); + arlan_queue_retransmit(dev); + } + break; + + case 9: + { + IFDEBUG(ARLAN_DEBUG_TX_CHAIN) + printk("arlan intr: transmit root dest not reg.\n"); + priv->bad += 1; + priv->reset = 1; + //arlan_drop_tx(dev); + arlan_queue_retransmit(dev); + } + break; + + default: + { + printk(KERN_ERR "arlan intr: transmit status unknown\n"); + priv->bad += 1; + priv->reset = 1; + arlan_drop_tx(dev); + } + } + + ARLAN_DEBUG_EXIT("arlan_tx_done_interrupt"); +} + + +static void arlan_rx_interrupt(struct net_device *dev, u_char rxStatus, u_short rxOffset, u_short pkt_len) +{ + char *skbtmp; + int i = 0; + + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + + + ARLAN_DEBUG_ENTRY("arlan_rx_interrupt"); + // by spec, not WRITESHMB(arlan->rxStatus,0x00); + // prohibited here arlan_command(dev, ARLAN_COMMAND_RX); + + if (pkt_len < 10 || pkt_len > 2048) + { + printk(KERN_WARNING "%s: got too short or long packet, len %d \n", dev->name, pkt_len); + return; + } + if (rxOffset + pkt_len > 0x2000) + { + printk("%s: got too long packet, len %d offset %x\n", dev->name, pkt_len, rxOffset); + return; + } + priv->in_bytes += pkt_len; + priv->in_bytes10 += pkt_len; + if (conf->measure_rate < 1) + conf->measure_rate = 1; + if (time_after(jiffies, priv->in_time + conf->measure_rate * HZ)) + { + conf->in_speed = priv->in_bytes / conf->measure_rate; + priv->in_bytes = 0; + priv->in_time = jiffies; + } + if (time_after(jiffies, priv->in_time10 + conf->measure_rate * 10*HZ)) + { + conf->in_speed10 = priv->in_bytes10 / (10 * conf->measure_rate); + priv->in_bytes10 = 0; + priv->in_time10 = jiffies; + } + DEBUGSHM(1, "arlan rcv pkt rxStatus= %d ", arlan->rxStatus, u_char); + switch (rxStatus) + { + case 1: + case 2: + case 3: + { + /* Malloc up new buffer. */ + struct sk_buff *skb; + + DEBUGSHM(50, "arlan recv pkt offs=%d\n", arlan->rxOffset, u_short); + DEBUGSHM(1, "arlan rxFrmType = %d \n", arlan->rxFrmType, u_char); + DEBUGSHM(1, KERN_INFO "arlan rx scrambled = %d \n", arlan->scrambled, u_char); + + /* here we do multicast filtering to avoid slow 8-bit memcopy */ +#ifdef ARLAN_MULTICAST + if (!(dev->flags & IFF_ALLMULTI) && + !(dev->flags & IFF_PROMISC) && + dev->mc_list) + { + char hw_dst_addr[6]; + struct dev_mc_list *dmi = dev->mc_list; + int i; + + memcpy_fromio(hw_dst_addr, arlan->ultimateDestAddress, 6); + if (hw_dst_addr[0] == 0x01) + { + if (mdebug) + if (hw_dst_addr[1] == 0x00) + printk(KERN_ERR "%s mcast 0x0100 \n", dev->name); + else if (hw_dst_addr[1] == 0x40) + printk(KERN_ERR "%s m/bcast 0x0140 \n", dev->name); + while (dmi) + { if (dmi->dmi_addrlen == 6) + { + if (arlan_debug & ARLAN_DEBUG_HEADER_DUMP) + printk(KERN_ERR "%s mcl %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name, + dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2], + dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]); + for (i = 0; i < 6; i++) + if (dmi->dmi_addr[i] != hw_dst_addr[i]) + break; + if (i == 6) + break; + } + else + printk(KERN_ERR "%s: invalid multicast address length given.\n", dev->name); + dmi = dmi->next; + } + /* we reach here if multicast filtering is on and packet + * is multicast and not for receive */ + goto end_of_interrupt; + } + } +#endif // ARLAN_MULTICAST + /* multicast filtering ends here */ + pkt_len += ARLAN_FAKE_HDR_LEN; + + skb = dev_alloc_skb(pkt_len + 4); + if (skb == NULL) + { + printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name); + priv->stats.rx_dropped++; + break; + } + skb_reserve(skb, 2); + skb->dev = dev; + skbtmp = skb_put(skb, pkt_len); + + memcpy_fromio(skbtmp + ARLAN_FAKE_HDR_LEN, ((char __iomem *) arlan) + rxOffset, pkt_len - ARLAN_FAKE_HDR_LEN); + memcpy_fromio(skbtmp, arlan->ultimateDestAddress, 6); + memcpy_fromio(skbtmp + 6, arlan->rxSrc, 6); + WRITESHMB(arlan->rxStatus, 0x00); + arlan_command(dev, ARLAN_COMMAND_RX); + + IFDEBUG(ARLAN_DEBUG_HEADER_DUMP) + { + char immedDestAddress[6]; + char immedSrcAddress[6]; + memcpy_fromio(immedDestAddress, arlan->immedDestAddress, 6); + memcpy_fromio(immedSrcAddress, arlan->immedSrcAddress, 6); + + printk(KERN_WARNING "%s t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x imd %2x:%2x:%2x:%2x:%2x:%2x ims %2x:%2x:%2x:%2x:%2x:%2x\n", dev->name, + (unsigned char) skbtmp[0], (unsigned char) skbtmp[1], (unsigned char) skbtmp[2], (unsigned char) skbtmp[3], + (unsigned char) skbtmp[4], (unsigned char) skbtmp[5], (unsigned char) skbtmp[6], (unsigned char) skbtmp[7], + (unsigned char) skbtmp[8], (unsigned char) skbtmp[9], (unsigned char) skbtmp[10], (unsigned char) skbtmp[11], + immedDestAddress[0], immedDestAddress[1], immedDestAddress[2], + immedDestAddress[3], immedDestAddress[4], immedDestAddress[5], + immedSrcAddress[0], immedSrcAddress[1], immedSrcAddress[2], + immedSrcAddress[3], immedSrcAddress[4], immedSrcAddress[5]); + } + skb->protocol = eth_type_trans(skb, dev); + IFDEBUG(ARLAN_DEBUG_HEADER_DUMP) + if (skb->protocol != 0x608 && skb->protocol != 0x8) + { + for (i = 0; i <= 22; i++) + printk("%02x:", (u_char) skbtmp[i + 12]); + printk(KERN_ERR "\n"); + printk(KERN_WARNING "arlan kernel pkt type trans %x \n", skb->protocol); + } + netif_rx(skb); + dev->last_rx = jiffies; + priv->stats.rx_packets++; + priv->stats.rx_bytes += pkt_len; + } + break; + + default: + printk(KERN_ERR "arlan intr: received unknown status\n"); + priv->stats.rx_crc_errors++; + break; + } + ARLAN_DEBUG_EXIT("arlan_rx_interrupt"); +} + +static void arlan_process_interrupt(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + u_char rxStatus = READSHMB(arlan->rxStatus); + u_char txStatus = READSHMB(arlan->txStatus); + u_short rxOffset = READSHMS(arlan->rxOffset); + u_short pkt_len = READSHMS(arlan->rxLength); + int interrupt_count = 0; + + ARLAN_DEBUG_ENTRY("arlan_process_interrupt"); + + if (test_and_set_bit(0, (void *) &priv->interrupt_processing_active)) + { + if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS) + printk(KERN_ERR "interrupt chain reentering \n"); + goto end_int_process; + } + while ((rxStatus || txStatus || priv->interrupt_ack_requested) + && (interrupt_count < 5)) + { + if (rxStatus) + priv->last_rx_int_ack_time = jiffies; + + arlan_command(dev, ARLAN_COMMAND_INT_ACK); + arlan_command(dev, ARLAN_COMMAND_INT_ENABLE); + + IFDEBUG(ARLAN_DEBUG_INTERRUPT) + printk(KERN_ERR "%s: got IRQ rx %x tx %x comm %x rxOff %x rxLen %x \n", + dev->name, rxStatus, txStatus, READSHMB(arlan->commandByte), + rxOffset, pkt_len); + + if (rxStatus == 0 && txStatus == 0) + { + if (priv->irq_test_done) + { + if (!registrationBad(dev)) + IFDEBUG(ARLAN_DEBUG_INTERRUPT) printk(KERN_ERR "%s unknown interrupt(nop? regLost ?) reason tx %d rx %d ", + dev->name, txStatus, rxStatus); + } else { + IFDEBUG(ARLAN_DEBUG_INTERRUPT) + printk(KERN_INFO "%s irq $%d test OK \n", dev->name, dev->irq); + + } + priv->interrupt_ack_requested = 0; + goto ends; + } + if (txStatus != 0) + { + WRITESHMB(arlan->txStatus, 0x00); + arlan_tx_done_interrupt(dev, txStatus); + goto ends; + } + if (rxStatus == 1 || rxStatus == 2) + { /* a packet waiting */ + arlan_rx_interrupt(dev, rxStatus, rxOffset, pkt_len); + goto ends; + } + if (rxStatus > 2 && rxStatus < 0xff) + { + WRITESHMB(arlan->rxStatus, 0x00); + printk(KERN_ERR "%s unknown rxStatus reason tx %d rx %d ", + dev->name, txStatus, rxStatus); + goto ends; + } + if (rxStatus == 0xff) + { + WRITESHMB(arlan->rxStatus, 0x00); + arlan_command(dev, ARLAN_COMMAND_RX); + if (registrationBad(dev)) + netif_device_detach(dev); + if (!registrationBad(dev)) + { + priv->registrationLastSeen = jiffies; + if (!netif_queue_stopped(dev) && !priv->under_reset && !priv->under_config) + netif_wake_queue (dev); + } + goto ends; + } +ends: + + arlan_command_process(dev); + + rxStatus = READSHMB(arlan->rxStatus); + txStatus = READSHMB(arlan->txStatus); + rxOffset = READSHMS(arlan->rxOffset); + pkt_len = READSHMS(arlan->rxLength); + + + priv->irq_test_done = 1; + + interrupt_count++; + } + priv->interrupt_processing_active = 0; + +end_int_process: + arlan_command_process(dev); + + ARLAN_DEBUG_EXIT("arlan_process_interrupt"); + return; +} + +static irqreturn_t arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + u_char rxStatus = READSHMB(arlan->rxStatus); + u_char txStatus = READSHMB(arlan->txStatus); + + ARLAN_DEBUG_ENTRY("arlan_interrupt"); + + + if (!rxStatus && !txStatus) + priv->interrupt_ack_requested++; + + arlan_process_interrupt(dev); + + priv->irq_test_done = 1; + + ARLAN_DEBUG_EXIT("arlan_interrupt"); + return IRQ_HANDLED; + +} + + +static int arlan_close(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + + ARLAN_DEBUG_ENTRY("arlan_close"); + + del_timer_sync(&priv->timer); + + arlan_command(dev, ARLAN_COMMAND_POWERDOWN); + + IFDEBUG(ARLAN_DEBUG_STARTUP) + printk(KERN_NOTICE "%s: Closing device\n", dev->name); + + netif_stop_queue(dev); + free_irq(dev->irq, dev); + + ARLAN_DEBUG_EXIT("arlan_close"); + return 0; +} + +#ifdef ARLAN_DEBUGGING +static long alignLong(volatile u_char * ptr) +{ + long ret; + memcpy_fromio(&ret, (void *) ptr, 4); + return ret; +} +#endif + +/* + * Get the current statistics. + * This may be called with the card open or closed. + */ + +static struct net_device_stats *arlan_statistics(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + + + ARLAN_DEBUG_ENTRY("arlan_statistics"); + + /* Update the statistics from the device registers. */ + + READSHM(priv->stats.collisions, arlan->numReTransmissions, u_int); + READSHM(priv->stats.rx_crc_errors, arlan->numCRCErrors, u_int); + READSHM(priv->stats.rx_dropped, arlan->numFramesDiscarded, u_int); + READSHM(priv->stats.rx_fifo_errors, arlan->numRXBufferOverflows, u_int); + READSHM(priv->stats.rx_frame_errors, arlan->numReceiveFramesLost, u_int); + READSHM(priv->stats.rx_over_errors, arlan->numRXOverruns, u_int); + READSHM(priv->stats.rx_packets, arlan->numDatagramsReceived, u_int); + READSHM(priv->stats.tx_aborted_errors, arlan->numAbortErrors, u_int); + READSHM(priv->stats.tx_carrier_errors, arlan->numStatusTimeouts, u_int); + READSHM(priv->stats.tx_dropped, arlan->numDatagramsDiscarded, u_int); + READSHM(priv->stats.tx_fifo_errors, arlan->numTXUnderruns, u_int); + READSHM(priv->stats.tx_packets, arlan->numDatagramsTransmitted, u_int); + READSHM(priv->stats.tx_window_errors, arlan->numHoldOffs, u_int); + + ARLAN_DEBUG_EXIT("arlan_statistics"); + + return &priv->stats; +} + + +static void arlan_set_multicast(struct net_device *dev) +{ + struct arlan_private *priv = netdev_priv(dev); + volatile struct arlan_shmem __iomem *arlan = priv->card; + struct arlan_conf_stru *conf = priv->Conf; + int board_conf_needed = 0; + + + ARLAN_DEBUG_ENTRY("arlan_set_multicast"); + + if (dev->flags & IFF_PROMISC) + { + unsigned char recMode; + READSHM(recMode, arlan->receiveMode, u_char); + conf->receiveMode = (ARLAN_RCV_PROMISC | ARLAN_RCV_CONTROL); + if (conf->receiveMode != recMode) + board_conf_needed = 1; + } + else + { + /* turn off promiscuous mode */ + unsigned char recMode; + READSHM(recMode, arlan->receiveMode, u_char); + conf->receiveMode = ARLAN_RCV_CLEAN | ARLAN_RCV_CONTROL; + if (conf->receiveMode != recMode) + board_conf_needed = 1; + } + if (board_conf_needed) + arlan_command(dev, ARLAN_COMMAND_CONF); + + ARLAN_DEBUG_EXIT("arlan_set_multicast"); +} + + +struct net_device * __init arlan_probe(int unit) +{ + struct net_device *dev; + int err; + int m; + + ARLAN_DEBUG_ENTRY("arlan_probe"); + + if (arlans_found == MAX_ARLANS) + return ERR_PTR(-ENODEV); + + /* + * Reserve space for local data and a copy of the shared memory + * that is used by the /proc interface. + */ + dev = alloc_etherdev(sizeof(struct arlan_private) + + sizeof(struct arlan_shmem)); + if (!dev) + return ERR_PTR(-ENOMEM); + + SET_MODULE_OWNER(dev); + + if (unit >= 0) { + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + if (dev->mem_start) { + if (arlan_probe_here(dev, dev->mem_start) == 0) + goto found; + goto not_found; + } + + } + + + for (m = (int)phys_to_virt(lastFoundAt) + ARLAN_SHMEM_SIZE; + m <= (int)phys_to_virt(0xDE000); + m += ARLAN_SHMEM_SIZE) + { + if (arlan_probe_here(dev, m) == 0) + { + lastFoundAt = (int)virt_to_phys((void*)m); + goto found; + } + } + + if (lastFoundAt == 0xbe000) + printk(KERN_ERR "arlan: No Arlan devices found \n"); + + not_found: + free_netdev(dev); + return ERR_PTR(-ENODEV); + + found: + err = arlan_setup_device(dev, arlans_found); + if (err) + dev = ERR_PTR(err); + else if (!arlans_found++) + printk(KERN_INFO "Arlan driver %s\n", arlan_version); + + return dev; +} + +#ifdef MODULE +int init_module(void) +{ + int i = 0; + + ARLAN_DEBUG_ENTRY("init_module"); + + if (channelSet != channelSetUNKNOWN || channelNumber != channelNumberUNKNOWN || systemId != systemIdUNKNOWN) + return -EINVAL; + + for (i = 0; i < MAX_ARLANS; i++) { + struct net_device *dev = arlan_probe(i); + + if (IS_ERR(dev)) + return PTR_ERR(dev); + } + init_arlan_proc(); + printk(KERN_INFO "Arlan driver %s\n", arlan_version); + ARLAN_DEBUG_EXIT("init_module"); + return 0; +} + + +void cleanup_module(void) +{ + int i = 0; + struct net_device *dev; + + ARLAN_DEBUG_ENTRY("cleanup_module"); + + IFDEBUG(ARLAN_DEBUG_SHUTDOWN) + printk(KERN_INFO "arlan: unloading module\n"); + + cleanup_arlan_proc(); + + for (i = 0; i < MAX_ARLANS; i++) + { + dev = arlan_device[i]; + if (dev) { + arlan_command(dev, ARLAN_COMMAND_POWERDOWN ); + + unregister_netdev(dev); + release_mem_region(virt_to_phys((void *) dev->mem_start), + ARLAN_SHMEM_SIZE); + free_netdev(dev); + arlan_device[i] = NULL; + } + } + + ARLAN_DEBUG_EXIT("cleanup_module"); +} + + +#endif +MODULE_LICENSE("GPL"); |
