1 files changed, 106 insertions, 0 deletions

diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
new file mode 100644
index 000000000000..63df3ca02ac2
--- /dev/null
+++ b/arch/um/drivers/line.h
@@ -0,0 +1,106 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __LINE_H__
+#define __LINE_H__
+
+#include "linux/list.h"
+#include "linux/workqueue.h"
+#include "linux/tty.h"
+#include "linux/interrupt.h"
+#include "linux/spinlock.h"
+#include "linux/mutex.h"
+#include "chan_user.h"
+#include "mconsole_kern.h"
+
+/* There's only one modifiable field in this - .mc.list */
+struct line_driver {
+        const char *name;
+        const char *device_name;
+        const short major;
+        const short minor_start;
+        const short type;
+        const short subtype;
+        const int read_irq;
+        const char *read_irq_name;
+        const int write_irq;
+        const char *write_irq_name;
+        struct mc_device mc;
+};
+
+struct line {
+        struct tty_struct *tty;
+        spinlock_t count_lock;
+        unsigned long count;
+        int valid;
+
+        char *init_str;
+        int init_pri;
+        struct list_head chan_list;
+
+        /*This lock is actually, mostly, local to*/
+        spinlock_t lock;
+        int throttled;
+        /* Yes, this is a real circular buffer.
+         * XXX: And this should become a struct kfifo!
+         *
+         * buffer points to a buffer allocated on demand, of length
+         * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
+        char *buffer;
+        char *head;
+        char *tail;
+
+        int sigio;
+        struct delayed_work task;
+        const struct line_driver *driver;
+        int have_irq;
+};
+
+#define LINE_INIT(str, d) \
+        { .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \
+          .init_str =   str,    \
+          .init_pri =   INIT_STATIC, \
+          .valid =      1, \
+          .lock =       __SPIN_LOCK_UNLOCKED((str).lock), \
+          .driver =     d }
+
+extern void line_close(struct tty_struct *tty, struct file * filp);
+extern int line_open(struct line *lines, struct tty_struct *tty);
+extern int line_setup(struct line *lines, unsigned int sizeof_lines,
+                      char *init, char **error_out);
+extern int line_write(struct tty_struct *tty, const unsigned char *buf,
+                      int len);
+extern int line_put_char(struct tty_struct *tty, unsigned char ch);
+extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
+extern int line_chars_in_buffer(struct tty_struct *tty);
+extern void line_flush_buffer(struct tty_struct *tty);
+extern void line_flush_chars(struct tty_struct *tty);
+extern int line_write_room(struct tty_struct *tty);
+extern int line_ioctl(struct tty_struct *tty, unsigned int cmd,
+                                unsigned long arg);
+extern void line_throttle(struct tty_struct *tty);
+extern void line_unthrottle(struct tty_struct *tty);
+
+extern char *add_xterm_umid(char *base);
+extern int line_setup_irq(int fd, int input, int output, struct line *line,
+                          void *data);
+extern void line_close_chan(struct line *line);
+extern struct tty_driver *register_lines(struct line_driver *line_driver,
+                                         const struct tty_operations *driver,
+                                         struct line *lines, int nlines);
+extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
+extern void close_lines(struct line *lines, int nlines);
+
+extern int line_config(struct line *lines, unsigned int sizeof_lines,
+                       char *str, const struct chan_opts *opts,
+                       char **error_out);
+extern int line_id(char **str, int *start_out, int *end_out);
+extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
+                       char **error_out);
+extern int line_get_config(char *dev, struct line *lines,
+                           unsigned int sizeof_lines, char *str,
+                           int size, char **error_out);
+
+#endif