diff options
Diffstat (limited to 'kernel/include/linux/scc.h')
| -rw-r--r-- | kernel/include/linux/scc.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/kernel/include/linux/scc.h b/kernel/include/linux/scc.h new file mode 100644 index 000000000..c5a004962 --- /dev/null +++ b/kernel/include/linux/scc.h @@ -0,0 +1,85 @@ +/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */ +#ifndef _SCC_H +#define _SCC_H + +#include <uapi/linux/scc.h> + + +enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */ + +/* Vector masks in RR2B */ + +#define VECTOR_MASK 0x06 +#define TXINT 0x00 +#define EXINT 0x02 +#define RXINT 0x04 +#define SPINT 0x06 + +#ifdef CONFIG_SCC_DELAY +#define Inb(port) inb_p(port) +#define Outb(port, val) outb_p(val, port) +#else +#define Inb(port) inb(port) +#define Outb(port, val) outb(val, port) +#endif + +/* SCC channel control structure for KISS */ + +struct scc_kiss { + unsigned char txdelay; /* Transmit Delay 10 ms/cnt */ + unsigned char persist; /* Persistence (0-255) as a % */ + unsigned char slottime; /* Delay to wait on persistence hit */ + unsigned char tailtime; /* Delay after last byte written */ + unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */ + unsigned char waittime; /* Waittime before any transmit attempt */ + unsigned int maxkeyup; /* Maximum time to transmit (seconds) */ + unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */ + unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */ + unsigned int maxdefer; /* Timer for CSMA channel busy limit */ + unsigned char tx_inhibit; /* Transmit is not allowed when set */ + unsigned char group; /* Group ID for AX.25 TX interlocking */ + unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */ + unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */ +}; + + +/* SCC channel structure */ + +struct scc_channel { + int init; /* channel exists? */ + + struct net_device *dev; /* link to device control structure */ + struct net_device_stats dev_stat;/* device statistics */ + + char brand; /* manufacturer of the board */ + long clock; /* used clock */ + + io_port ctrl; /* I/O address of CONTROL register */ + io_port data; /* I/O address of DATA register */ + io_port special; /* I/O address of special function port */ + int irq; /* Number of Interrupt */ + + char option; + char enhanced; /* Enhanced SCC support */ + + unsigned char wreg[16]; /* Copy of last written value in WRx */ + unsigned char status; /* Copy of R0 at last external interrupt */ + unsigned char dcd; /* DCD status */ + + struct scc_kiss kiss; /* control structure for KISS params */ + struct scc_stat stat; /* statistical information */ + struct scc_modem modem; /* modem information */ + + struct sk_buff_head tx_queue; /* next tx buffer */ + struct sk_buff *rx_buff; /* pointer to frame currently received */ + struct sk_buff *tx_buff; /* pointer to frame currently transmitted */ + + /* Timer */ + struct timer_list tx_t; /* tx timer for this channel */ + struct timer_list tx_wdog; /* tx watchdogs */ + + /* Channel lock */ + spinlock_t lock; /* Channel guard lock */ +}; + +#endif /* defined(_SCC_H) */ |