- 根目录:
- drivers
- net
- hamradio
- scc.c
#define RCS_ID "$Id: scc.c,v 1.75 1998/11/04 15:15:01 jreuter Exp jreuter $"
#define VERSION "3.0"
#undef SCC_LDELAY
#undef SCC_DONT_CHECK
#define SCC_MAXCHIPS 4
#define SCC_BUFSIZE 384
#undef SCC_DEBUG
#define SCC_DEFAULT_CLOCK 4915200
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <linux/socket.h>
#include <linux/init.h>
#include <linux/scc.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/bitops.h>
#include <net/net_namespace.h>
#include <net/ax25.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include "z8530.h"
static const char banner[] __initconst = KERN_INFO \
"AX.25: Z8530 SCC driver version "VERSION".dl1bke\n";
static void t_dwait(unsigned long);
static void t_txdelay(unsigned long);
static void t_tail(unsigned long);
static void t_busy(unsigned long);
static void t_maxkeyup(unsigned long);
static void t_idle(unsigned long);
static void scc_tx_done(struct scc_channel *);
static void scc_start_tx_timer(struct scc_channel *, void (*)(unsigned long), unsigned long);
static void scc_start_maxkeyup(struct scc_channel *);
static void scc_start_defer(struct scc_channel *);
static void z8530_init(void);
static void init_channel(struct scc_channel *scc);
static void scc_key_trx (struct scc_channel *scc, char tx);
static void scc_init_timer(struct scc_channel *scc);
static int scc_net_alloc(const char *name, struct scc_channel *scc);
static void scc_net_setup(struct net_device *dev);
static int scc_net_open(struct net_device *dev);
static int scc_net_close(struct net_device *dev);
static void scc_net_rx(struct scc_channel *scc, struct sk_buff *skb);
static netdev_tx_t scc_net_tx(struct sk_buff *skb,
struct net_device *dev);
static int scc_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static int scc_net_set_mac_address(struct net_device *dev, void *addr);
static struct net_device_stats * scc_net_get_stats(struct net_device *dev);
static unsigned char SCC_DriverName[] = "scc";
static struct irqflags { unsigned char used : 1; } Ivec[NR_IRQS];
static struct scc_channel SCC_Info[2 * SCC_MAXCHIPS];
static struct scc_ctrl {
io_port chan_A;
io_port chan_B;
int irq;
} SCC_ctrl[SCC_MAXCHIPS+1];
static unsigned char Driver_Initialized;
static int Nchips;
static io_port Vector_Latch;
static DEFINE_SPINLOCK(iolock);
static inline unsigned char InReg(io_port port, unsigned char reg)
{
unsigned long flags;
unsigned char r;
spin_lock_irqsave(&iolock, flags);
#ifdef SCC_LDELAY
Outb(port, reg);
udelay(SCC_LDELAY);
r=Inb(port);
udelay(SCC_LDELAY);
#else
Outb(port, reg);
r=Inb(port);
#endif
spin_unlock_irqrestore(&iolock, flags);
return r;
}
static inline void OutReg(io_port port, unsigned char reg, unsigned char val)
{
unsigned long flags;
spin_lock_irqsave(&iolock, flags);
#ifdef SCC_LDELAY
Outb(port, reg); udelay(SCC_LDELAY);
Outb(port, val); udelay(SCC_LDELAY);
#else
Outb(port, reg);
Outb(port, val);
#endif
spin_unlock_irqrestore(&iolock, flags);
}
static inline void wr(struct scc_channel *scc, unsigned char reg,
unsigned char val)
{
OutReg(scc->ctrl, reg, (scc->wreg[reg] = val));
}
static inline void or(struct scc_channel *scc, unsigned char reg, unsigned char val)
{
OutReg(scc->ctrl, reg, (scc->wreg[reg] |= val));
}
static inline void cl(struct scc_channel *scc, unsigned char reg, unsigned char val)
{
OutReg(scc->ctrl, reg, (scc->wreg[reg] &= ~val));
}
static inline void scc_discard_buffers(struct scc_channel *scc)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
if (scc->tx_buff != NULL)
{
dev_kfree_skb(scc->tx_buff);
scc->tx_buff = NULL;
}
while (!skb_queue_empty(&scc->tx_queue))
dev_kfree_skb(skb_dequeue(&scc->tx_queue));
spin_unlock_irqrestore(&scc->lock, flags);
}
static inline void scc_notify(struct scc_channel *scc, int event)
{
struct sk_buff *skb;
char *bp;
if (scc->kiss.fulldup != KISS_DUPLEX_OPTIMA)
return;
skb = dev_alloc_skb(2);
if (skb != NULL)
{
bp = skb_put(skb, 2);
*bp++ = PARAM_HWEVENT;
*bp++ = event;
scc_net_rx(scc, skb);
} else
scc->stat.nospace++;
}
static inline void flush_rx_FIFO(struct scc_channel *scc)
{
int k;
for (k=0; k<3; k++)
Inb(scc->data);
if(scc->rx_buff != NULL)
{
scc->stat.rxerrs++;
dev_kfree_skb_irq(scc->rx_buff);
scc->rx_buff = NULL;
}
}
static void start_hunt(struct scc_channel *scc)
{
if ((scc->modem.clocksrc != CLK_EXTERNAL))
OutReg(scc->ctrl,R14,SEARCH|scc->wreg[R14]);
or(scc,R3,ENT_HM|RxENABLE);
}
static inline void scc_txint(struct scc_channel *scc)
{
struct sk_buff *skb;
scc->stat.txints++;
skb = scc->tx_buff;
if (skb == NULL)
{
skb = skb_dequeue(&scc->tx_queue);
scc->tx_buff = skb;
netif_wake_queue(scc->dev);
if (skb == NULL)
{
scc_tx_done(scc);
Outb(scc->ctrl, RES_Tx_P);
return;
}
if (skb->len == 0)
{
dev_kfree_skb_irq(skb);
scc->tx_buff = NULL;
scc_tx_done(scc);
Outb(scc->ctrl, RES_Tx_P);
return;
}
scc->stat.tx_state = TXS_ACTIVE;
OutReg(scc->ctrl, R0, RES_Tx_CRC);
or(scc,R10,ABUNDER);
Outb(scc->data,*skb->data);
skb_pull(skb, 1);
if (!scc->enhanced)
Outb(scc->ctrl,RES_EOM_L);
return;
}
if (skb->len == 0)
{
Outb(scc->ctrl, RES_Tx_P);
cl(scc, R10, ABUNDER);
dev_kfree_skb_irq(skb);
scc->tx_buff = NULL;
scc->stat.tx_state = TXS_NEWFRAME;
return;
}
Outb(scc->data,*skb->data);
skb_pull(skb, 1);
}
static inline void scc_exint(struct scc_channel *scc)
{
unsigned char status,changes,chg_and_stat;
scc->stat.exints++;
status = InReg(scc->ctrl,R0);
changes = status ^ scc->status;
chg_and_stat = changes & status;
if (chg_and_stat & BRK_ABRT)
flush_rx_FIFO(scc);
if ((changes & SYNC_HUNT) && scc->kiss.softdcd)
{
if (status & SYNC_HUNT)
{
scc->dcd = 0;
flush_rx_FIFO(scc);
if ((scc->modem.clocksrc != CLK_EXTERNAL))
OutReg(scc->ctrl,R14,SEARCH|scc->wreg[R14]);
} else {
scc->dcd = 1;
}
scc_notify(scc, scc->dcd? HWEV_DCD_OFF:HWEV_DCD_ON);
}
if((changes & DCD) && !scc->kiss.softdcd)
{
if(status & DCD)
{
start_hunt(scc);
scc->dcd = 1;
} else {
cl(scc,R3,ENT_HM|RxENABLE);
flush_rx_FIFO(scc);
scc->dcd = 0;
}
scc_notify(scc, scc->dcd? HWEV_DCD_ON:HWEV_DCD_OFF);
}
#ifdef notdef
if (chg_and_stat & CTS)
{
if (scc->kiss.txdelay == 0)
scc_start_tx_timer(scc, t_txdelay, 0);
}
#endif
if (scc->stat.tx_state == TXS_ACTIVE && (status & TxEOM))
{
scc->stat.tx_under++;
Outb(scc->ctrl, RES_EXT_INT);
if (scc->tx_buff != NULL)
{
dev_kfree_skb_irq(scc->tx_buff);
scc->tx_buff = NULL;
}
or(scc,R10,ABUNDER);
scc_start_tx_timer(scc, t_txdelay, 0);
}
scc->status = status;
Outb(scc->ctrl,RES_EXT_INT);
}
static inline void scc_rxint(struct scc_channel *scc)
{
struct sk_buff *skb;
scc->stat.rxints++;
if((scc->wreg[5] & RTS) && scc->kiss.fulldup == KISS_DUPLEX_HALF)
{
Inb(scc->data);
or(scc,R3,ENT_HM);
return;
}
skb = scc->rx_buff;
if (skb == NULL)
{
skb = dev_alloc_skb(scc->stat.bufsize);
if (skb == NULL)
{
scc->dev_stat.rx_dropped++;
scc->stat.nospace++;
Inb(scc->data);
or(scc, R3, ENT_HM);
return;
}
scc->rx_buff = skb;
*(skb_put(skb, 1)) = 0;
}
if (skb->len >= scc->stat.bufsize)
{
#ifdef notdef
printk(KERN_DEBUG "z8530drv: oops, scc_rxint() received huge frame...\n");
#endif
dev_kfree_skb_irq(skb);
scc->rx_buff = NULL;
Inb(scc->data);
or(scc, R3, ENT_HM);
return;
}
*(skb_put(skb, 1)) = Inb(scc->data);
}
static inline void scc_spint(struct scc_channel *scc)
{
unsigned char status;
struct sk_buff *skb;
scc->stat.spints++;
status = InReg(scc->ctrl,R1);
Inb(scc->data);
skb = scc->rx_buff;
if(status & Rx_OVR)
{
scc->stat.rx_over++;
or(scc,R3,ENT_HM);
if (skb != NULL)
dev_kfree_skb_irq(skb);
scc->rx_buff = skb = NULL;
}
if(status & END_FR && skb != NULL)
{
if (!(status & CRC_ERR) && (status & 0xe) == RES8 && skb->len > 0)
{
skb_trim(skb, skb->len-1);
scc_net_rx(scc, skb);
scc->rx_buff = NULL;
scc->stat.rxframes++;
} else {
dev_kfree_skb_irq(skb);
scc->rx_buff = NULL;
scc->stat.rxerrs++;
}
}
Outb(scc->ctrl,ERR_RES);
}
static void scc_isr_dispatch(struct scc_channel *scc, int vector)
{
spin_lock(&scc->lock);
switch (vector & VECTOR_MASK)
{
case TXINT: scc_txint(scc); break;
case EXINT: scc_exint(scc); break;
case RXINT: scc_rxint(scc); break;
case SPINT: scc_spint(scc); break;
}
spin_unlock(&scc->lock);
}
#define SCC_IRQTIMEOUT 30000
static irqreturn_t scc_isr(int irq, void *dev_id)
{
int chip_irq = (long) dev_id;
unsigned char vector;
struct scc_channel *scc;
struct scc_ctrl *ctrl;
int k;
if (Vector_Latch)
{
for(k=0; k < SCC_IRQTIMEOUT; k++)
{
Outb(Vector_Latch, 0);
if((vector=Inb(Vector_Latch)) >= 16 * Nchips) break;
if (vector & 0x01) break;
scc=&SCC_Info[vector >> 3 ^ 0x01];
if (!scc->dev) break;
scc_isr_dispatch(scc, vector);
OutReg(scc->ctrl,R0,RES_H_IUS);
}
if (k == SCC_IRQTIMEOUT)
printk(KERN_WARNING "z8530drv: endless loop in scc_isr()?\n");
return IRQ_HANDLED;
}
ctrl = SCC_ctrl;
while (ctrl->chan_A)
{
if (ctrl->irq != chip_irq)
{
ctrl++;
continue;
}
scc = NULL;
for (k = 0; InReg(ctrl->chan_A,R3) && k < SCC_IRQTIMEOUT; k++)
{
vector=InReg(ctrl->chan_B,R2);
if (vector & 0x01) break;
scc = &SCC_Info[vector >> 3 ^ 0x01];
if (!scc->dev) break;
scc_isr_dispatch(scc, vector);
}
if (k == SCC_IRQTIMEOUT)
{
printk(KERN_WARNING "z8530drv: endless loop in scc_isr()?!\n");
break;
}
if (scc != NULL)
{
OutReg(scc->ctrl,R0,RES_H_IUS);
ctrl = SCC_ctrl;
} else
ctrl++;
}
return IRQ_HANDLED;
}
static inline void set_brg(struct scc_channel *scc, unsigned int tc)
{
cl(scc,R14,BRENABL);
wr(scc,R12,tc & 255);
wr(scc,R13,tc >> 8);
or(scc,R14,BRENABL);
}
static inline void set_speed(struct scc_channel *scc)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
if (scc->modem.speed > 0)
set_brg(scc, (unsigned) (scc->clock / (scc->modem.speed * 64)) - 2);
spin_unlock_irqrestore(&scc->lock, flags);
}
static inline void init_brg(struct scc_channel *scc)
{
wr(scc, R14, BRSRC);
OutReg(scc->ctrl, R14, SSBR|scc->wreg[R14]);
OutReg(scc->ctrl, R14, SNRZI|scc->wreg[R14]);
}
static void init_channel(struct scc_channel *scc)
{
del_timer(&scc->tx_t);
del_timer(&scc->tx_wdog);
disable_irq(scc->irq);
wr(scc,R4,X1CLK|SDLC);
wr(scc,R1,0);
wr(scc,R3,Rx8|RxCRC_ENAB);
wr(scc,R5,Tx8|DTR|TxCRC_ENAB);
wr(scc,R6,0);
wr(scc,R7,FLAG);
wr(scc,R9,VIS);
wr(scc,R10,(scc->modem.nrz? NRZ : NRZI)|CRCPS|ABUNDER);
wr(scc,R14, 0);
switch(scc->modem.clocksrc)
{
case CLK_DPLL:
wr(scc, R11, RCDPLL|TCDPLL|TRxCOI|TRxCDP);
init_brg(scc);
break;
case CLK_DIVIDER:
wr(scc, R11, ((scc->brand & BAYCOM)? TRxCDP : TRxCBR) | RCDPLL|TCRTxCP|TRxCOI);
init_brg(scc);
break;
case CLK_EXTERNAL:
wr(scc, R11, (scc->brand & BAYCOM)? RCTRxCP|TCRTxCP : RCRTxCP|TCTRxCP);
OutReg(scc->ctrl, R14, DISDPLL);
break;
}
set_speed(scc);
if(scc->enhanced)
{
or(scc,R15,SHDLCE|FIFOE);
wr(scc,R7,AUTOEOM);
}
if(scc->kiss.softdcd || (InReg(scc->ctrl,R0) & DCD))
{
start_hunt(scc);
}
wr(scc,R15, BRKIE|TxUIE|(scc->kiss.softdcd? SYNCIE:DCDIE));
Outb(scc->ctrl,RES_EXT_INT);
Outb(scc->ctrl,RES_EXT_INT);
or(scc,R1,INT_ALL_Rx|TxINT_ENAB|EXT_INT_ENAB);
scc->status = InReg(scc->ctrl,R0);
or(scc,R9,MIE);
scc_init_timer(scc);
enable_irq(scc->irq);
}
static void scc_key_trx(struct scc_channel *scc, char tx)
{
unsigned int time_const;
if (scc->brand & PRIMUS)
Outb(scc->ctrl + 4, scc->option | (tx? 0x80 : 0));
if (scc->modem.speed < 300)
scc->modem.speed = 1200;
time_const = (unsigned) (scc->clock / (scc->modem.speed * (tx? 2:64))) - 2;
disable_irq(scc->irq);
if (tx)
{
or(scc, R1, TxINT_ENAB);
or(scc, R15, TxUIE);
}
if (scc->modem.clocksrc == CLK_DPLL)
{
if (tx)
{
#ifdef CONFIG_SCC_TRXECHO
cl(scc, R3, RxENABLE|ENT_HM);
cl(scc, R15, DCDIE|SYNCIE);
#endif
set_brg(scc, time_const);
wr(scc, R11, RCDPLL|TCBR|TRxCOI|TRxCBR);
if (scc->kiss.tx_inhibit)
{
or(scc,R5, TxENAB);
scc->wreg[R5] |= RTS;
} else {
or(scc,R5,RTS|TxENAB);
}
} else {
cl(scc,R5,RTS|TxENAB);
set_brg(scc, time_const);
wr(scc, R11, RCDPLL|TCDPLL|TRxCOI|TRxCDP);
#ifndef CONFIG_SCC_TRXECHO
if (scc->kiss.softdcd)
#endif
{
or(scc,R15, scc->kiss.softdcd? SYNCIE:DCDIE);
start_hunt(scc);
}
}
} else {
if (tx)
{
#ifdef CONFIG_SCC_TRXECHO
if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
{
cl(scc, R3, RxENABLE);
cl(scc, R15, DCDIE|SYNCIE);
}
#endif
if (scc->kiss.tx_inhibit)
{
or(scc,R5, TxENAB);
scc->wreg[R5] |= RTS;
} else {
or(scc,R5,RTS|TxENAB);
}
} else {
cl(scc,R5,RTS|TxENAB);
if ((scc->kiss.fulldup == KISS_DUPLEX_HALF) &&
#ifndef CONFIG_SCC_TRXECHO
scc->kiss.softdcd)
#else
1)
#endif
{
or(scc, R15, scc->kiss.softdcd? SYNCIE:DCDIE);
start_hunt(scc);
}
}
}
enable_irq(scc->irq);
}
static void __scc_start_tx_timer(struct scc_channel *scc, void (*handler)(unsigned long), unsigned long when)
{
del_timer(&scc->tx_t);
if (when == 0)
{
handler((unsigned long) scc);
} else
if (when != TIMER_OFF)
{
scc->tx_t.data = (unsigned long) scc;
scc->tx_t.function = handler;
scc->tx_t.expires = jiffies + (when*HZ)/100;
add_timer(&scc->tx_t);
}
}
static void scc_start_tx_timer(struct scc_channel *scc, void (*handler)(unsigned long), unsigned long when)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
__scc_start_tx_timer(scc, handler, when);
spin_unlock_irqrestore(&scc->lock, flags);
}
static void scc_start_defer(struct scc_channel *scc)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
del_timer(&scc->tx_wdog);
if (scc->kiss.maxdefer != 0 && scc->kiss.maxdefer != TIMER_OFF)
{
scc->tx_wdog.data = (unsigned long) scc;
scc->tx_wdog.function = t_busy;
scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxdefer;
add_timer(&scc->tx_wdog);
}
spin_unlock_irqrestore(&scc->lock, flags);
}
static void scc_start_maxkeyup(struct scc_channel *scc)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
del_timer(&scc->tx_wdog);
if (scc->kiss.maxkeyup != 0 && scc->kiss.maxkeyup != TIMER_OFF)
{
scc->tx_wdog.data = (unsigned long) scc;
scc->tx_wdog.function = t_maxkeyup;
scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxkeyup;
add_timer(&scc->tx_wdog);
}
spin_unlock_irqrestore(&scc->lock, flags);
}
static void scc_tx_done(struct scc_channel *scc)
{
switch (scc->kiss.fulldup)
{
case KISS_DUPLEX_LINK:
scc->stat.tx_state = TXS_IDLE2;
if (scc->kiss.idletime != TIMER_OFF)
scc_start_tx_timer(scc, t_idle,
scc->kiss.idletime*100);
break;
case KISS_DUPLEX_OPTIMA:
scc_notify(scc, HWEV_ALL_SENT);
break;
default:
scc->stat.tx_state = TXS_BUSY;
scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
}
netif_wake_queue(scc->dev);
}
static unsigned char Rand = 17;
static inline int is_grouped(struct scc_channel *scc)
{
int k;
struct scc_channel *scc2;
unsigned char grp1, grp2;
grp1 = scc->kiss.group;
for (k = 0; k < (Nchips * 2); k++)
{
scc2 = &SCC_Info[k];
grp2 = scc2->kiss.group;
if (scc2 == scc || !(scc2->dev && grp2))
continue;
if ((grp1 & 0x3f) == (grp2 & 0x3f))
{
if ( (grp1 & TXGROUP) && (scc2->wreg[R5] & RTS) )
return 1;
if ( (grp1 & RXGROUP) && scc2->dcd )
return 1;
}
}
return 0;
}
static void t_dwait(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
if (scc->stat.tx_state == TXS_WAIT)
{
if (skb_queue_empty(&scc->tx_queue)) {
scc->stat.tx_state = TXS_IDLE;
netif_wake_queue(scc->dev);
return;
}
scc->stat.tx_state = TXS_BUSY;
}
if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
{
Rand = Rand * 17 + 31;
if (scc->dcd || (scc->kiss.persist) < Rand || (scc->kiss.group && is_grouped(scc)) )
{
scc_start_defer(scc);
scc_start_tx_timer(scc, t_dwait, scc->kiss.slottime);
return ;
}
}
if ( !(scc->wreg[R5] & RTS) )
{
scc_key_trx(scc, TX_ON);
scc_start_tx_timer(scc, t_txdelay, scc->kiss.txdelay);
} else {
scc_start_tx_timer(scc, t_txdelay, 0);
}
}
static void t_txdelay(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
scc_start_maxkeyup(scc);
if (scc->tx_buff == NULL)
{
disable_irq(scc->irq);
scc_txint(scc);
enable_irq(scc->irq);
}
}
static void t_tail(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
del_timer(&scc->tx_wdog);
scc_key_trx(scc, TX_OFF);
spin_unlock_irqrestore(&scc->lock, flags);
if (scc->stat.tx_state == TXS_TIMEOUT)
{
scc->stat.tx_state = TXS_WAIT;
scc_start_tx_timer(scc, t_dwait, scc->kiss.mintime*100);
return;
}
scc->stat.tx_state = TXS_IDLE;
netif_wake_queue(scc->dev);
}
static void t_busy(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
del_timer(&scc->tx_t);
netif_stop_queue(scc->dev);
scc_discard_buffers(scc);
scc->stat.txerrs++;
scc->stat.tx_state = TXS_IDLE;
netif_wake_queue(scc->dev);
}
static void t_maxkeyup(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
netif_stop_queue(scc->dev);
scc_discard_buffers(scc);
del_timer(&scc->tx_t);
cl(scc, R1, TxINT_ENAB);
cl(scc, R15, TxUIE);
OutReg(scc->ctrl, R0, RES_Tx_P);
spin_unlock_irqrestore(&scc->lock, flags);
scc->stat.txerrs++;
scc->stat.tx_state = TXS_TIMEOUT;
scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
}
static void t_idle(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
del_timer(&scc->tx_wdog);
scc_key_trx(scc, TX_OFF);
if(scc->kiss.mintime)
scc_start_tx_timer(scc, t_dwait, scc->kiss.mintime*100);
scc->stat.tx_state = TXS_WAIT;
}
static void scc_init_timer(struct scc_channel *scc)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
scc->stat.tx_state = TXS_IDLE;
spin_unlock_irqrestore(&scc->lock, flags);
}
#define CAST(x) (unsigned long)(x)
static unsigned int scc_set_param(struct scc_channel *scc, unsigned int cmd, unsigned int arg)
{
switch (cmd)
{
case PARAM_TXDELAY: scc->kiss.txdelay=arg; break;
case PARAM_PERSIST: scc->kiss.persist=arg; break;
case PARAM_SLOTTIME: scc->kiss.slottime=arg; break;
case PARAM_TXTAIL: scc->kiss.tailtime=arg; break;
case PARAM_FULLDUP: scc->kiss.fulldup=arg; break;
case PARAM_DTR: break;
case PARAM_GROUP: scc->kiss.group=arg; break;
case PARAM_IDLE: scc->kiss.idletime=arg; break;
case PARAM_MIN: scc->kiss.mintime=arg; break;
case PARAM_MAXKEY: scc->kiss.maxkeyup=arg; break;
case PARAM_WAIT: scc->kiss.waittime=arg; break;
case PARAM_MAXDEFER: scc->kiss.maxdefer=arg; break;
case PARAM_TX: scc->kiss.tx_inhibit=arg; break;
case PARAM_SOFTDCD:
scc->kiss.softdcd=arg;
if (arg)
{
or(scc, R15, SYNCIE);
cl(scc, R15, DCDIE);
start_hunt(scc);
} else {
or(scc, R15, DCDIE);
cl(scc, R15, SYNCIE);
}
break;
case PARAM_SPEED:
if (arg < 256)
scc->modem.speed=arg*100;
else
scc->modem.speed=arg;
if (scc->stat.tx_state == 0)
set_speed(scc);
break;
case PARAM_RTS:
if ( !(scc->wreg[R5] & RTS) )
{
if (arg != TX_OFF) {
scc_key_trx(scc, TX_ON);
scc_start_tx_timer(scc, t_txdelay, scc->kiss.txdelay);
}
} else {
if (arg == TX_OFF)
{
scc->stat.tx_state = TXS_BUSY;
scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
}
}
break;
case PARAM_HWEVENT:
scc_notify(scc, scc->dcd? HWEV_DCD_ON:HWEV_DCD_OFF);
break;
default: return -EINVAL;
}
return 0;
}
static unsigned long scc_get_param(struct scc_channel *scc, unsigned int cmd)
{
switch (cmd)
{
case PARAM_TXDELAY: return CAST(scc->kiss.txdelay);
case PARAM_PERSIST: return CAST(scc->kiss.persist);
case PARAM_SLOTTIME: return CAST(scc->kiss.slottime);
case PARAM_TXTAIL: return CAST(scc->kiss.tailtime);
case PARAM_FULLDUP: return CAST(scc->kiss.fulldup);
case PARAM_SOFTDCD: return CAST(scc->kiss.softdcd);
case PARAM_DTR: return CAST((scc->wreg[R5] & DTR)? 1:0);
case PARAM_RTS: return CAST((scc->wreg[R5] & RTS)? 1:0);
case PARAM_SPEED: return CAST(scc->modem.speed);
case PARAM_GROUP: return CAST(scc->kiss.group);
case PARAM_IDLE: return CAST(scc->kiss.idletime);
case PARAM_MIN: return CAST(scc->kiss.mintime);
case PARAM_MAXKEY: return CAST(scc->kiss.maxkeyup);
case PARAM_WAIT: return CAST(scc->kiss.waittime);
case PARAM_MAXDEFER: return CAST(scc->kiss.maxdefer);
case PARAM_TX: return CAST(scc->kiss.tx_inhibit);
default: return NO_SUCH_PARAM;
}
}
#undef CAST
static void scc_stop_calibrate(unsigned long channel)
{
struct scc_channel *scc = (struct scc_channel *) channel;
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
del_timer(&scc->tx_wdog);
scc_key_trx(scc, TX_OFF);
wr(scc, R6, 0);
wr(scc, R7, FLAG);
Outb(scc->ctrl,RES_EXT_INT);
Outb(scc->ctrl,RES_EXT_INT);
netif_wake_queue(scc->dev);
spin_unlock_irqrestore(&scc->lock, flags);
}
static void
scc_start_calibrate(struct scc_channel *scc, int duration, unsigned char pattern)
{
unsigned long flags;
spin_lock_irqsave(&scc->lock, flags);
netif_stop_queue(scc->dev);
scc_discard_buffers(scc);
del_timer(&scc->tx_wdog);
scc->tx_wdog.data = (unsigned long) scc;
scc->tx_wdog.function = scc_stop_calibrate;
scc->tx_wdog.expires = jiffies + HZ*duration;
add_timer(&scc->tx_wdog);
wr(scc, R6, 0);
wr(scc, R7, pattern);
Outb(scc->ctrl,RES_EXT_INT);
Outb(scc->ctrl,RES_EXT_INT);
scc_key_trx(scc, TX_ON);
spin_unlock_irqrestore(&scc->lock, flags);
}
static void z8530_init(void)
{
struct scc_channel *scc;
int chip, k;
unsigned long flags;
char *flag;
printk(KERN_INFO "Init Z8530 driver: %u channels, IRQ", Nchips*2);
flag=" ";
for (k = 0; k < nr_irqs; k++)
if (Ivec[k].used)
{
printk("%s%d", flag, k);
flag=",";
}
printk("\n");
for (chip = 0; chip < Nchips; chip++)
{
scc=&SCC_Info[2*chip];
if (!scc->ctrl) continue;
if(scc->brand & EAGLE)
Outb(scc->special,0x08);
if(scc->brand & (PC100 | PRIMUS))
Outb(scc->special,scc->option);
spin_lock_irqsave(&scc->lock, flags);
Outb(scc->ctrl, 0);
OutReg(scc->ctrl,R9,FHWRES);
udelay(100);
wr(scc, R2, chip*16);
wr(scc, R9, VIS);
spin_unlock_irqrestore(&scc->lock, flags);
}
Driver_Initialized = 1;
}
static int scc_net_alloc(const char *name, struct scc_channel *scc)
{
int err;
struct net_device *dev;
dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, scc_net_setup);
if (!dev)
return -ENOMEM;
dev->ml_priv = scc;
scc->dev = dev;
spin_lock_init(&scc->lock);
init_timer(&scc->tx_t);
init_timer(&scc->tx_wdog);
err = register_netdevice(dev);
if (err) {
printk(KERN_ERR "%s: can't register network device (%d)\n",
name, err);
free_netdev(dev);
scc->dev = NULL;
return err;
}
return 0;
}
static const struct net_device_ops scc_netdev_ops = {
.ndo_open = scc_net_open,
.ndo_stop = scc_net_close,
.ndo_start_xmit = scc_net_tx,
.ndo_set_mac_address = scc_net_set_mac_address,
.ndo_get_stats = scc_net_get_stats,
.ndo_do_ioctl = scc_net_ioctl,
};
static void scc_net_setup(struct net_device *dev)
{
dev->tx_queue_len = 16;
dev->netdev_ops = &scc_netdev_ops;
dev->header_ops = &ax25_header_ops;
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN);
dev->flags = 0;
dev->type = ARPHRD_AX25;
dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
dev->mtu = AX25_DEF_PACLEN;
dev->addr_len = AX25_ADDR_LEN;
}
static int scc_net_open(struct net_device *dev)
{
struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
if (!scc->init)
return -EINVAL;
scc->tx_buff = NULL;
skb_queue_head_init(&scc->tx_queue);
init_channel(scc);
netif_start_queue(dev);
return 0;
}
static int scc_net_close(struct net_device *dev)
{
struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
unsigned long flags;
netif_stop_queue(dev);
spin_lock_irqsave(&scc->lock, flags);
Outb(scc->ctrl,0);
wr(scc,R1,0);
wr(scc,R3,0);
spin_unlock_irqrestore(&scc->lock, flags);
del_timer_sync(&scc->tx_t);
del_timer_sync(&scc->tx_wdog);
scc_discard_buffers(scc);
return 0;
}
static void scc_net_rx(struct scc_channel *scc, struct sk_buff *skb)
{
if (skb->len == 0) {
dev_kfree_skb_irq(skb);
return;
}
scc->dev_stat.rx_packets++;
scc->dev_stat.rx_bytes += skb->len;
skb->protocol = ax25_type_trans(skb, scc->dev);
netif_rx(skb);
}
static netdev_tx_t scc_net_tx(struct sk_buff *skb, struct net_device *dev)
{
struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
unsigned long flags;
char kisscmd;
if (skb->len > scc->stat.bufsize || skb->len < 2) {
scc->dev_stat.tx_dropped++;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
scc->dev_stat.tx_packets++;
scc->dev_stat.tx_bytes += skb->len;
scc->stat.txframes++;
kisscmd = *skb->data & 0x1f;
skb_pull(skb, 1);
if (kisscmd) {
scc_set_param(scc, kisscmd, *skb->data);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
spin_lock_irqsave(&scc->lock, flags);
if (skb_queue_len(&scc->tx_queue) > scc->dev->tx_queue_len) {
struct sk_buff *skb_del;
skb_del = skb_dequeue(&scc->tx_queue);
dev_kfree_skb(skb_del);
}
skb_queue_tail(&scc->tx_queue, skb);
dev->trans_start = jiffies;
if(scc->stat.tx_state == TXS_IDLE || scc->stat.tx_state == TXS_IDLE2) {
scc->stat.tx_state = TXS_BUSY;
if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
__scc_start_tx_timer(scc, t_dwait, scc->kiss.waittime);
else
__scc_start_tx_timer(scc, t_dwait, 0);
}
spin_unlock_irqrestore(&scc->lock, flags);
return NETDEV_TX_OK;
}
static int scc_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct scc_kiss_cmd kiss_cmd;
struct scc_mem_config memcfg;
struct scc_hw_config hwcfg;
struct scc_calibrate cal;
struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
int chan;
unsigned char device_name[IFNAMSIZ];
void __user *arg = ifr->ifr_data;
if (!Driver_Initialized)
{
if (cmd == SIOCSCCCFG)
{
int found = 1;
if (!capable(CAP_SYS_RAWIO)) return -EPERM;
if (!arg) return -EFAULT;
if (Nchips >= SCC_MAXCHIPS)
return -EINVAL;
if (copy_from_user(&hwcfg, arg, sizeof(hwcfg)))
return -EFAULT;
if (hwcfg.irq == 2) hwcfg.irq = 9;
if (hwcfg.irq < 0 || hwcfg.irq >= nr_irqs)
return -EINVAL;
if (!Ivec[hwcfg.irq].used && hwcfg.irq)
{
if (request_irq(hwcfg.irq, scc_isr,
0, "AX.25 SCC",
(void *)(long) hwcfg.irq))
printk(KERN_WARNING "z8530drv: warning, cannot get IRQ %d\n", hwcfg.irq);
else
Ivec[hwcfg.irq].used = 1;
}
if (hwcfg.vector_latch && !Vector_Latch) {
if (!request_region(hwcfg.vector_latch, 1, "scc vector latch"))
printk(KERN_WARNING "z8530drv: warning, cannot reserve vector latch port 0x%lx\n, disabled.", hwcfg.vector_latch);
else
Vector_Latch = hwcfg.vector_latch;
}
if (hwcfg.clock == 0)
hwcfg.clock = SCC_DEFAULT_CLOCK;
#ifndef SCC_DONT_CHECK
if(request_region(hwcfg.ctrl_a, 1, "scc-probe"))
{
disable_irq(hwcfg.irq);
Outb(hwcfg.ctrl_a, 0);
OutReg(hwcfg.ctrl_a, R9, FHWRES);
udelay(100);
OutReg(hwcfg.ctrl_a,R13,0x55);
udelay(5);
if (InReg(hwcfg.ctrl_a,R13) != 0x55)
found = 0;
enable_irq(hwcfg.irq);
release_region(hwcfg.ctrl_a, 1);
}
else
found = 0;
#endif
if (found)
{
SCC_Info[2*Nchips ].ctrl = hwcfg.ctrl_a;
SCC_Info[2*Nchips ].data = hwcfg.data_a;
SCC_Info[2*Nchips ].irq = hwcfg.irq;
SCC_Info[2*Nchips+1].ctrl = hwcfg.ctrl_b;
SCC_Info[2*Nchips+1].data = hwcfg.data_b;
SCC_Info[2*Nchips+1].irq = hwcfg.irq;
SCC_ctrl[Nchips].chan_A = hwcfg.ctrl_a;
SCC_ctrl[Nchips].chan_B = hwcfg.ctrl_b;
SCC_ctrl[Nchips].irq = hwcfg.irq;
}
for (chan = 0; chan < 2; chan++)
{
sprintf(device_name, "%s%i", SCC_DriverName, 2*Nchips+chan);
SCC_Info[2*Nchips+chan].special = hwcfg.special;
SCC_Info[2*Nchips+chan].clock = hwcfg.clock;
SCC_Info[2*Nchips+chan].brand = hwcfg.brand;
SCC_Info[2*Nchips+chan].option = hwcfg.option;
SCC_Info[2*Nchips+chan].enhanced = hwcfg.escc;
#ifdef SCC_DONT_CHECK
printk(KERN_INFO "%s: data port = 0x%3.3x control port = 0x%3.3x\n",
device_name,
SCC_Info[2*Nchips+chan].data,
SCC_Info[2*Nchips+chan].ctrl);
#else
printk(KERN_INFO "%s: data port = 0x%3.3lx control port = 0x%3.3lx -- %s\n",
device_name,
chan? hwcfg.data_b : hwcfg.data_a,
chan? hwcfg.ctrl_b : hwcfg.ctrl_a,
found? "found" : "missing");
#endif
if (found)
{
request_region(SCC_Info[2*Nchips+chan].ctrl, 1, "scc ctrl");
request_region(SCC_Info[2*Nchips+chan].data, 1, "scc data");
if (Nchips+chan != 0 &&
scc_net_alloc(device_name,
&SCC_Info[2*Nchips+chan]))
return -EINVAL;
}
}
if (found) Nchips++;
return 0;
}
if (cmd == SIOCSCCINI)
{
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
if (Nchips == 0)
return -EINVAL;
z8530_init();
return 0;
}
return -EINVAL;
}
if (!scc->init)
{
if (cmd == SIOCSCCCHANINI)
{
if (!capable(CAP_NET_ADMIN)) return -EPERM;
if (!arg) return -EINVAL;
scc->stat.bufsize = SCC_BUFSIZE;
if (copy_from_user(&scc->modem, arg, sizeof(struct scc_modem)))
return -EINVAL;
if (scc->modem.speed < 4800)
{
scc->kiss.txdelay = 36;
scc->kiss.persist = 42;
scc->kiss.slottime = 16;
scc->kiss.tailtime = 4;
scc->kiss.fulldup = 0;
scc->kiss.waittime = 50;
scc->kiss.maxkeyup = 10;
scc->kiss.mintime = 3;
scc->kiss.idletime = 30;
scc->kiss.maxdefer = 120;
scc->kiss.softdcd = 0;
} else {
scc->kiss.txdelay = 10;
scc->kiss.persist = 64;
scc->kiss.slottime = 8;
scc->kiss.tailtime = 1;
scc->kiss.fulldup = 0;
scc->kiss.waittime = 50;
scc->kiss.maxkeyup = 7;
scc->kiss.mintime = 3;
scc->kiss.idletime = 30;
scc->kiss.maxdefer = 120;
scc->kiss.softdcd = 0;
}
scc->tx_buff = NULL;
skb_queue_head_init(&scc->tx_queue);
scc->init = 1;
return 0;
}
return -EINVAL;
}
switch(cmd)
{
case SIOCSCCRESERVED:
return -ENOIOCTLCMD;
case SIOCSCCSMEM:
if (!capable(CAP_SYS_RAWIO)) return -EPERM;
if (!arg || copy_from_user(&memcfg, arg, sizeof(memcfg)))
return -EINVAL;
scc->stat.bufsize = memcfg.bufsize;
return 0;
case SIOCSCCGSTAT:
if (!arg || copy_to_user(arg, &scc->stat, sizeof(scc->stat)))
return -EINVAL;
return 0;
case SIOCSCCGKISS:
if (!arg || copy_from_user(&kiss_cmd, arg, sizeof(kiss_cmd)))
return -EINVAL;
kiss_cmd.param = scc_get_param(scc, kiss_cmd.command);
if (copy_to_user(arg, &kiss_cmd, sizeof(kiss_cmd)))
return -EINVAL;
return 0;
case SIOCSCCSKISS:
if (!capable(CAP_NET_ADMIN)) return -EPERM;
if (!arg || copy_from_user(&kiss_cmd, arg, sizeof(kiss_cmd)))
return -EINVAL;
return scc_set_param(scc, kiss_cmd.command, kiss_cmd.param);
case SIOCSCCCAL:
if (!capable(CAP_SYS_RAWIO)) return -EPERM;
if (!arg || copy_from_user(&cal, arg, sizeof(cal)) || cal.time == 0)
return -EINVAL;
scc_start_calibrate(scc, cal.time, cal.pattern);
return 0;
default:
return -ENOIOCTLCMD;
}
return -EINVAL;
}
static int scc_net_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = (struct sockaddr *) addr;
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
return 0;
}
static struct net_device_stats *scc_net_get_stats(struct net_device *dev)
{
struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
scc->dev_stat.rx_errors = scc->stat.rxerrs + scc->stat.rx_over;
scc->dev_stat.tx_errors = scc->stat.txerrs + scc->stat.tx_under;
scc->dev_stat.rx_fifo_errors = scc->stat.rx_over;
scc->dev_stat.tx_fifo_errors = scc->stat.tx_under;
return &scc->dev_stat;
}
#ifdef CONFIG_PROC_FS
static inline struct scc_channel *scc_net_seq_idx(loff_t pos)
{
int k;
for (k = 0; k < Nchips*2; ++k) {
if (!SCC_Info[k].init)
continue;
if (pos-- == 0)
return &SCC_Info[k];
}
return NULL;
}
static void *scc_net_seq_start(struct seq_file *seq, loff_t *pos)
{
return *pos ? scc_net_seq_idx(*pos - 1) : SEQ_START_TOKEN;
}
static void *scc_net_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
unsigned k;
struct scc_channel *scc = v;
++*pos;
for (k = (v == SEQ_START_TOKEN) ? 0 : (scc - SCC_Info)+1;
k < Nchips*2; ++k) {
if (SCC_Info[k].init)
return &SCC_Info[k];
}
return NULL;
}
static void scc_net_seq_stop(struct seq_file *seq, void *v)
{
}
static int scc_net_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN) {
seq_puts(seq, "z8530drv-"VERSION"\n");
} else if (!Driver_Initialized) {
seq_puts(seq, "not initialized\n");
} else if (!Nchips) {
seq_puts(seq, "chips missing\n");
} else {
const struct scc_channel *scc = v;
const struct scc_stat *stat = &scc->stat;
const struct scc_kiss *kiss = &scc->kiss;
seq_printf(seq, "%s\t%3.3lx %3.3lx %d %lu %2.2x %d %3.3lx %3.3lx %d\n",
scc->dev->name,
scc->data, scc->ctrl, scc->irq, scc->clock, scc->brand,
scc->enhanced, Vector_Latch, scc->special,
scc->option);
seq_printf(seq, "\t%lu %d %d %d %d\n",
scc->modem.speed, scc->modem.nrz,
scc->modem.clocksrc, kiss->softdcd,
stat->bufsize);
seq_printf(seq, "\t%lu %lu %lu %lu\n",
stat->rxints, stat->txints, stat->exints, stat->spints);
seq_printf(seq, "\t%lu %lu %d / %lu %lu %d / %d %d\n",
stat->rxframes, stat->rxerrs, stat->rx_over,
stat->txframes, stat->txerrs, stat->tx_under,
stat->nospace, stat->tx_state);
#define K(x) kiss->x
seq_printf(seq, "\t%d %d %d %d %d %d %d %d %d %d %d %d\n",
K(txdelay), K(persist), K(slottime), K(tailtime),
K(fulldup), K(waittime), K(mintime), K(maxkeyup),
K(idletime), K(maxdefer), K(tx_inhibit), K(group));
#undef K
#ifdef SCC_DEBUG
{
int reg;
seq_printf(seq, "\tW ");
for (reg = 0; reg < 16; reg++)
seq_printf(seq, "%2.2x ", scc->wreg[reg]);
seq_printf(seq, "\n");
seq_printf(seq, "\tR %2.2x %2.2x XX ", InReg(scc->ctrl,R0), InReg(scc->ctrl,R1));
for (reg = 3; reg < 8; reg++)
seq_printf(seq, "%2.2x ", InReg(scc->ctrl, reg));
seq_printf(seq, "XX ");
for (reg = 9; reg < 16; reg++)
seq_printf(seq, "%2.2x ", InReg(scc->ctrl, reg));
seq_printf(seq, "\n");
}
#endif
seq_putc(seq, '\n');
}
return 0;
}
static const struct seq_operations scc_net_seq_ops = {
.start = scc_net_seq_start,
.next = scc_net_seq_next,
.stop = scc_net_seq_stop,
.show = scc_net_seq_show,
};
static int scc_net_seq_open(struct inode *inode, struct file *file)
{
return seq_open(file, &scc_net_seq_ops);
}
static const struct file_operations scc_net_seq_fops = {
.owner = THIS_MODULE,
.open = scc_net_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
#endif
static int __init scc_init_driver (void)
{
char devname[IFNAMSIZ];
printk(banner);
sprintf(devname,"%s0", SCC_DriverName);
rtnl_lock();
if (scc_net_alloc(devname, SCC_Info)) {
rtnl_unlock();
printk(KERN_ERR "z8530drv: cannot initialize module\n");
return -EIO;
}
rtnl_unlock();
proc_create("z8530drv", 0, init_net.proc_net, &scc_net_seq_fops);
return 0;
}
static void __exit scc_cleanup_driver(void)
{
io_port ctrl;
int k;
struct scc_channel *scc;
struct net_device *dev;
if (Nchips == 0 && (dev = SCC_Info[0].dev))
{
unregister_netdev(dev);
free_netdev(dev);
}
local_irq_disable();
for (k = 0; k < Nchips; k++)
if ( (ctrl = SCC_ctrl[k].chan_A) )
{
Outb(ctrl, 0);
OutReg(ctrl,R9,FHWRES);
udelay(50);
}
for (k = 0; k < nr_irqs ; k++)
if (Ivec[k].used) free_irq(k, NULL);
local_irq_enable();
for (k = 0; k < Nchips*2; k++)
{
scc = &SCC_Info[k];
if (scc->ctrl)
{
release_region(scc->ctrl, 1);
release_region(scc->data, 1);
}
if (scc->dev)
{
unregister_netdev(scc->dev);
free_netdev(scc->dev);
}
}
if (Vector_Latch)
release_region(Vector_Latch, 1);
remove_proc_entry("z8530drv", init_net.proc_net);
}
MODULE_AUTHOR("Joerg Reuter <jreuter@yaina.de>");
MODULE_DESCRIPTION("AX.25 Device Driver for Z8530 based HDLC cards");
MODULE_SUPPORTED_DEVICE("Z8530 based SCC cards for Amateur Radio");
MODULE_LICENSE("GPL");
module_init(scc_init_driver);
module_exit(scc_cleanup_driver);
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