1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */ 3 #ifndef _SCC_H 4 #define _SCC_H 5 6 #include <uapi/linux/scc.h> 7 8 9 enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */ 10 11 /* Vector masks in RR2B */ 12 13 #define VECTOR_MASK 0x06 14 #define TXINT 0x00 15 #define EXINT 0x02 16 #define RXINT 0x04 17 #define SPINT 0x06 18 19 #ifdef CONFIG_SCC_DELAY 20 #define Inb(port) inb_p(port) 21 #define Outb(port, val) outb_p(val, port) 22 #else 23 #define Inb(port) inb(port) 24 #define Outb(port, val) outb(val, port) 25 #endif 26 27 /* SCC channel control structure for KISS */ 28 29 struct scc_kiss { 30 unsigned char txdelay; /* Transmit Delay 10 ms/cnt */ 31 unsigned char persist; /* Persistence (0-255) as a % */ 32 unsigned char slottime; /* Delay to wait on persistence hit */ 33 unsigned char tailtime; /* Delay after last byte written */ 34 unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */ 35 unsigned char waittime; /* Waittime before any transmit attempt */ 36 unsigned int maxkeyup; /* Maximum time to transmit (seconds) */ 37 unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */ 38 unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */ 39 unsigned int maxdefer; /* Timer for CSMA channel busy limit */ 40 unsigned char tx_inhibit; /* Transmit is not allowed when set */ 41 unsigned char group; /* Group ID for AX.25 TX interlocking */ 42 unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */ 43 unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */ 44 }; 45 46 47 /* SCC channel structure */ 48 49 struct scc_channel { 50 int init; /* channel exists? */ 51 52 struct net_device *dev; /* link to device control structure */ 53 struct net_device_stats dev_stat;/* device statistics */ 54 55 char brand; /* manufacturer of the board */ 56 long clock; /* used clock */ 57 58 io_port ctrl; /* I/O address of CONTROL register */ 59 io_port data; /* I/O address of DATA register */ 60 io_port special; /* I/O address of special function port */ 61 int irq; /* Number of Interrupt */ 62 63 char option; 64 char enhanced; /* Enhanced SCC support */ 65 66 unsigned char wreg[16]; /* Copy of last written value in WRx */ 67 unsigned char status; /* Copy of R0 at last external interrupt */ 68 unsigned char dcd; /* DCD status */ 69 70 struct scc_kiss kiss; /* control structure for KISS params */ 71 struct scc_stat stat; /* statistical information */ 72 struct scc_modem modem; /* modem information */ 73 74 struct sk_buff_head tx_queue; /* next tx buffer */ 75 struct sk_buff *rx_buff; /* pointer to frame currently received */ 76 struct sk_buff *tx_buff; /* pointer to frame currently transmitted */ 77 78 /* Timer */ 79 struct timer_list tx_t; /* tx timer for this channel */ 80 struct timer_list tx_wdog; /* tx watchdogs */ 81 82 /* Channel lock */ 83 spinlock_t lock; /* Channel guard lock */ 84 }; 85 86 #endif /* defined(_SCC_H) */ 87