Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / lp.h

diff --git a/kernel/include/linux/lp.h b/kernel/include/linux/lp.h
new file mode 100644 (file)
index 0000000..0dd276a
--- /dev/null
+++ b/kernel/include/linux/lp.h
@@ -0,0 +1,100 @@
+/*
+ * 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