cregit-Linux how code gets into the kernel

Release 4.15 include/linux/scc.h

Directory: include/linux
/* 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) */

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)26696.38%866.67%
Alan Cox51.81%18.33%
David Howells31.09%18.33%
Greg Kroah-Hartman10.36%18.33%
Jeroen Vreeken10.36%18.33%
Total276100.00%12100.00%
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