| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* $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) */ |