v4.19.13 snapshot.
diff --git a/include/linux/lp.h b/include/linux/lp.h
new file mode 100644
index 0000000..be8a07e
--- /dev/null
+++ b/include/linux/lp.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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