1 /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */ 2 #ifndef _SCC_H 3 #define _SCC_H 4 5 #include <uapi/linux/scc.h> 6 7 8 enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */ 9 10 /* Vector masks in RR2B */ 11 12 #define VECTOR_MASK 0x06 13 #define TXINT 0x00 14 #define EXINT 0x02 15 #define RXINT 0x04 16 #define SPINT 0x06 17 18 #ifdef CONFIG_SCC_DELAY 19 #define Inb(port) inb_p(port) 20 #define Outb(port, val) outb_p(val, port) 21 #else 22 #define Inb(port) inb(port) 23 #define Outb(port, val) outb(val, port) 24 #endif 25 26 /* SCC channel control structure for KISS */ 27 28 struct scc_kiss { 29 unsigned char txdelay; /* Transmit Delay 10 ms/cnt */ 30 unsigned char persist; /* Persistence (0-255) as a % */ 31 unsigned char slottime; /* Delay to wait on persistence hit */ 32 unsigned char tailtime; /* Delay after last byte written */ 33 unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */ 34 unsigned char waittime; /* Waittime before any transmit attempt */ 35 unsigned int maxkeyup; /* Maximum time to transmit (seconds) */ 36 unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */ 37 unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */ 38 unsigned int maxdefer; /* Timer for CSMA channel busy limit */ 39 unsigned char tx_inhibit; /* Transmit is not allowed when set */ 40 unsigned char group; /* Group ID for AX.25 TX interlocking */ 41 unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */ 42 unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */ 43 }; 44 45 46 /* SCC channel structure */ 47 48 struct scc_channel { 49 int init; /* channel exists? */ 50 51 struct net_device *dev; /* link to device control structure */ 52 struct net_device_stats dev_stat;/* device statistics */ 53 54 char brand; /* manufacturer of the board */ 55 long clock; /* used clock */ 56 57 io_port ctrl; /* I/O address of CONTROL register */ 58 io_port data; /* I/O address of DATA register */ 59 io_port special; /* I/O address of special function port */ 60 int irq; /* Number of Interrupt */ 61 62 char option; 63 char enhanced; /* Enhanced SCC support */ 64 65 unsigned char wreg[16]; /* Copy of last written value in WRx */ 66 unsigned char status; /* Copy of R0 at last external interrupt */ 67 unsigned char dcd; /* DCD status */ 68 69 struct scc_kiss kiss; /* control structure for KISS params */ 70 struct scc_stat stat; /* statistical information */ 71 struct scc_modem modem; /* modem information */ 72 73 struct sk_buff_head tx_queue; /* next tx buffer */ 74 struct sk_buff *rx_buff; /* pointer to frame currently received */ 75 struct sk_buff *tx_buff; /* pointer to frame currently transmitted */ 76 77 /* Timer */ 78 struct timer_list tx_t; /* tx timer for this channel */ 79 struct timer_list tx_wdog; /* tx watchdogs */ 80 81 /* Channel lock */ 82 spinlock_t lock; /* Channel guard lock */ 83 }; 84 85 #endif /* defined(_SCC_H) */ 86