mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 20:20:55 +07:00
607ca46e97
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
|
|
* usr/include/linux/lp.h c.1991-1992 James Wiegand
|
|
* many modifications copyright (C) 1992 Michael K. Johnson
|
|
* Interrupt support added 1993 Nigel Gamble
|
|
* Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti
|
|
*/
|
|
#ifndef _LINUX_LP_H
|
|
#define _LINUX_LP_H
|
|
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/mutex.h>
|
|
#include <uapi/linux/lp.h>
|
|
|
|
/* Magic numbers for defining port-device mappings */
|
|
#define LP_PARPORT_UNSPEC -4
|
|
#define LP_PARPORT_AUTO -3
|
|
#define LP_PARPORT_OFF -2
|
|
#define LP_PARPORT_NONE -1
|
|
|
|
#define LP_F(minor) lp_table[(minor)].flags /* flags for busy, etc. */
|
|
#define LP_CHAR(minor) lp_table[(minor)].chars /* busy timeout */
|
|
#define LP_TIME(minor) lp_table[(minor)].time /* wait time */
|
|
#define LP_WAIT(minor) lp_table[(minor)].wait /* strobe wait */
|
|
#define LP_IRQ(minor) lp_table[(minor)].dev->port->irq /* interrupt # */
|
|
/* PARPORT_IRQ_NONE means polled */
|
|
#ifdef LP_STATS
|
|
#define LP_STAT(minor) lp_table[(minor)].stats /* statistics area */
|
|
#endif
|
|
#define LP_BUFFER_SIZE PAGE_SIZE
|
|
|
|
#define LP_BASE(x) lp_table[(x)].dev->port->base
|
|
|
|
#ifdef LP_STATS
|
|
struct lp_stats {
|
|
unsigned long chars;
|
|
unsigned long sleeps;
|
|
unsigned int maxrun;
|
|
unsigned int maxwait;
|
|
unsigned int meanwait;
|
|
unsigned int mdev;
|
|
};
|
|
#endif
|
|
|
|
struct lp_struct {
|
|
struct pardevice *dev;
|
|
unsigned long flags;
|
|
unsigned int chars;
|
|
unsigned int time;
|
|
unsigned int wait;
|
|
char *lp_buffer;
|
|
#ifdef LP_STATS
|
|
unsigned int lastcall;
|
|
unsigned int runchars;
|
|
struct lp_stats stats;
|
|
#endif
|
|
wait_queue_head_t waitq;
|
|
unsigned int last_error;
|
|
struct mutex port_mutex;
|
|
wait_queue_head_t dataq;
|
|
long timeout;
|
|
unsigned int best_mode;
|
|
unsigned int current_mode;
|
|
unsigned long bits;
|
|
};
|
|
|
|
/*
|
|
* The following constants describe the various signals of the printer port
|
|
* hardware. Note that the hardware inverts some signals and that some
|
|
* signals are active low. An example is LP_STROBE, which must be programmed
|
|
* with 1 for being active and 0 for being inactive, because the strobe signal
|
|
* gets inverted, but it is also active low.
|
|
*/
|
|
|
|
|
|
/*
|
|
* defines for 8255 control port
|
|
* base + 2
|
|
* accessed with LP_C(minor)
|
|
*/
|
|
#define LP_PINTEN 0x10 /* high to read data in or-ed with data out */
|
|
#define LP_PSELECP 0x08 /* inverted output, active low */
|
|
#define LP_PINITP 0x04 /* unchanged output, active low */
|
|
#define LP_PAUTOLF 0x02 /* inverted output, active low */
|
|
#define LP_PSTROBE 0x01 /* short high output on raising edge */
|
|
|
|
/*
|
|
* the value written to ports to test existence. PC-style ports will
|
|
* return the value written. AT-style ports will return 0. so why not
|
|
* make them the same ?
|
|
*/
|
|
#define LP_DUMMY 0x00
|
|
|
|
/*
|
|
* This is the port delay time, in microseconds.
|
|
* It is used only in the lp_init() and lp_reset() routine.
|
|
*/
|
|
#define LP_DELAY 50
|
|
|
|
#endif
|