projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 | 2 | /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */ |
| 1da177e4 LT |
3 | #ifndef _SCC_H |
| 4 | #define _SCC_H | |
| 5 | ||
| 607ca46e | 6 | #include <uapi/linux/scc.h> |
| 1da177e4 | 7 | |
| 1da177e4 LT |
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 | ||
| 1da177e4 | 86 | #endif /* defined(_SCC_H) */ |