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linux/drivers/net/wireless/arlan-main.c
Roel Kluin 9ab56078e6 arlan: inverted logic? 
Inverted logic

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-24 15:05:27 -04:00

1888 lines
51 KiB
C
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/*
* 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 "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 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(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_named(debug, 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_named(EEPROM_bad, arlan_EEPROM_bad, int, 0);
MODULE_PARM_DESC(debug, "Arlan debug enable (0-1)");
MODULE_PARM_DESC(retries, "Arlan maximum packet retransmisions");
#ifdef ARLAN_ENTRY_EXIT_DEBUGGING
static int arlan_entry_debug;
static int arlan_exit_debug;
static int arlan_entry_and_exit_debug;
module_param_named(entry_debug, arlan_entry_debug, int, 0);
module_param_named(exit_debug, arlan_exit_debug, int, 0);
module_param_named(entry_and_exit_debug, arlan_entry_and_exit_debug, int, 0);
MODULE_PARM_DESC(entry_debug, "Arlan driver function entry debugging");
MODULE_PARM_DESC(exit_debug, "Arlan driver function exit debugging");
MODULE_PARM_DESC(entry_and_exit_debug, "Arlan driver function entry and exit debugging");
#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);
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);
dev->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 const struct net_device_ops arlan_netdev_ops = {
.ndo_open = arlan_open,
.ndo_stop = arlan_close,
.ndo_start_xmit = arlan_tx,
.ndo_get_stats = arlan_statistics,
.ndo_set_multicast_list = arlan_set_multicast,
.ndo_change_mtu = arlan_change_mtu,
.ndo_set_mac_address = arlan_mac_addr,
.ndo_tx_timeout = arlan_tx_timeout,
.ndo_validate_addr = eth_validate_addr,
};
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->netdev_ops = &arlan_netdev_ops;
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 %llx, \n ", dev->name,
(u64) 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 NETDEV_TX_OK;
bad_end:
arlan_process_interrupt(dev);
netif_stop_queue (dev);
ARLAN_DEBUG_EXIT("arlan_tx");
return NETDEV_TX_BUSY;
}
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");
dev->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 %pM\n",
dev->name, dmi->dmi_addr);
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);
dev->stats.rx_dropped++;
break;
}
skb_reserve(skb, 2);
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 %pM f %pM imd %pM ims %pM\n",
dev->name, skbtmp,
&skbtmp[6],
immedDestAddress,
immedSrcAddress);
}
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->stats.rx_packets++;
dev->stats.rx_bytes += pkt_len;
}
break;
default:
printk(KERN_ERR "arlan intr: received unknown status\n");
dev->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 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(dev->stats.collisions, arlan->numReTransmissions, u_int);
READSHM(dev->stats.rx_crc_errors, arlan->numCRCErrors, u_int);
READSHM(dev->stats.rx_dropped, arlan->numFramesDiscarded, u_int);
READSHM(dev->stats.rx_fifo_errors, arlan->numRXBufferOverflows, u_int);
READSHM(dev->stats.rx_frame_errors, arlan->numReceiveFramesLost, u_int);
READSHM(dev->stats.rx_over_errors, arlan->numRXOverruns, u_int);
READSHM(dev->stats.rx_packets, arlan->numDatagramsReceived, u_int);
READSHM(dev->stats.tx_aborted_errors, arlan->numAbortErrors, u_int);
READSHM(dev->stats.tx_carrier_errors, arlan->numStatusTimeouts, u_int);
READSHM(dev->stats.tx_dropped, arlan->numDatagramsDiscarded, u_int);
READSHM(dev->stats.tx_fifo_errors, arlan->numTXUnderruns, u_int);
READSHM(dev->stats.tx_packets, arlan->numDatagramsTransmitted, u_int);
READSHM(dev->stats.tx_window_errors, arlan->numHoldOffs, u_int);
ARLAN_DEBUG_EXIT("arlan_statistics");
return &dev->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);
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 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 __exit 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");
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