193 lines
6.4 KiB
C
193 lines
6.4 KiB
C
diff -urN linux_lp.h.orig linux_lp.h
|
|
--- linux_lp.h.orig Thu Jan 1 00:00:00 1970
|
|
+++ linux_lp.h Fri Feb 16 19:44:52 2001
|
|
@@ -0,0 +1,188 @@
|
|
+#ifndef _LINUX_LP_H
|
|
+#define _LINUX_LP_H
|
|
+
|
|
+/*
|
|
+ * usr/include/linux/lp.h c.1991-1992 James Wiegand
|
|
+ * many modifications copyright (C) 1992 Michael K. Johnson
|
|
+ * Interrupt support added 1993 Nigel Gamble
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * Per POSIX guidelines, this module reserves the LP and lp prefixes
|
|
+ * These are the lp_table[minor].flags flags...
|
|
+ */
|
|
+#define LP_EXIST 0x0001
|
|
+#define LP_SELEC 0x0002
|
|
+#define LP_BUSY 0x0004
|
|
+#define LP_BUSY_BIT_POS 2
|
|
+#define LP_OFFL 0x0008
|
|
+#define LP_NOPA 0x0010
|
|
+#define LP_ERR 0x0020
|
|
+#define LP_ABORT 0x0040
|
|
+#define LP_CAREFUL 0x0080 /* obsoleted -arca */
|
|
+#define LP_ABORTOPEN 0x0100
|
|
+#define LP_TRUST_IRQ 0x0200
|
|
+
|
|
+/* timeout for each character. This is relative to bus cycles -- it
|
|
+ * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you
|
|
+ * have extremely slow printing, or if the machine seems to slow down
|
|
+ * a lot when you print. If you have slow printing, increase this
|
|
+ * number and recompile, and if your system gets bogged down, decrease
|
|
+ * this number. This can be changed with the tunelp(8) command as well.
|
|
+ */
|
|
+
|
|
+#define LP_INIT_CHAR 1000
|
|
+
|
|
+/* The parallel port specs apparently say that there needs to be
|
|
+ * a .5usec wait before and after the strobe.
|
|
+ */
|
|
+
|
|
+#define LP_INIT_WAIT 1
|
|
+
|
|
+/* This is the amount of time that the driver waits for the printer to
|
|
+ * catch up when the printer's buffer appears to be filled. If you
|
|
+ * want to tune this and have a fast printer (i.e. HPIIIP), decrease
|
|
+ * this number, and if you have a slow printer, increase this number.
|
|
+ * This is in hundredths of a second, the default 2 being .05 second.
|
|
+ * Or use the tunelp(8) command, which is especially nice if you want
|
|
+ * change back and forth between character and graphics printing, which
|
|
+ * are wildly different...
|
|
+ */
|
|
+
|
|
+#define LP_INIT_TIME 2
|
|
+
|
|
+/* IOCTL numbers */
|
|
+#define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */
|
|
+#define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */
|
|
+#define LPABORT 0x0604 /* call with TRUE arg to abort on error,
|
|
+ FALSE to retry. Default is retry. */
|
|
+#define LPSETIRQ 0x0605 /* call with new IRQ number,
|
|
+ or 0 for polling (no IRQ) */
|
|
+#define LPGETIRQ 0x0606 /* get the current IRQ number */
|
|
+#define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */
|
|
+/* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */
|
|
+#define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off-
|
|
+ line, and error indicators good on all writes,
|
|
+ FALSE to ignore them. Default is ignore. */
|
|
+#define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error,
|
|
+ FALSE to ignore error. Default is ignore. */
|
|
+#define LPGETSTATUS 0x060b /* return LP_S(minor) */
|
|
+#define LPRESET 0x060c /* reset printer */
|
|
+#ifdef LP_STATS
|
|
+#define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */
|
|
+#endif
|
|
+#define LPGETFLAGS 0x060e /* get status flags */
|
|
+#define LPTRUSTIRQ 0x060f /* set/unset the LP_TRUST_IRQ flag */
|
|
+
|
|
+/* timeout for printk'ing a timeout, in jiffies (100ths of a second).
|
|
+ This is also used for re-checking error conditions if LP_ABORT is
|
|
+ not set. This is the default behavior. */
|
|
+
|
|
+#define LP_TIMEOUT_INTERRUPT (60 * HZ)
|
|
+#define LP_TIMEOUT_POLLED (10 * HZ)
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+
|
|
+/* 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 256
|
|
+
|
|
+#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
|
|
+ struct wait_queue *wait_q;
|
|
+ unsigned int last_error;
|
|
+ volatile unsigned int irq_detected:1;
|
|
+ volatile unsigned int irq_missed:1;
|
|
+};
|
|
+
|
|
+/*
|
|
+ * 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.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * bit defines for 8255 status port
|
|
+ * base + 1
|
|
+ * accessed with LP_S(minor), which gets the byte...
|
|
+ */
|
|
+#define LP_PBUSY 0x80 /* inverted input, active high */
|
|
+#define LP_PACK 0x40 /* unchanged input, active low */
|
|
+#define LP_POUTPA 0x20 /* unchanged input, active high */
|
|
+#define LP_PSELECD 0x10 /* unchanged input, active high */
|
|
+#define LP_PERRORP 0x08 /* unchanged input, 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
|
|
+
|
|
+#define LP_POLLED(minor) (lp_table[(minor)].dev->port->irq == PARPORT_IRQ_NONE)
|
|
+#define LP_PREEMPTED(minor) (lp_table[(minor)].dev->port->waithead != NULL)
|
|
+
|
|
+/*
|
|
+ * function prototypes
|
|
+ */
|
|
+
|
|
+extern int lp_init(void);
|
|
+
|
|
+#endif
|
|
+
|
|
+#endif
|