Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 279 insertions, 0 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
new file mode 100644
index 000000000000..b368b296d035
--- /dev/null
+++ b/include/linux/tty_driver.h
@@ -0,0 +1,279 @@
+#ifndef _LINUX_TTY_DRIVER_H
+#define _LINUX_TTY_DRIVER_H
+
+/*
+ * This structure defines the interface between the low-level tty
+ * driver and the tty routines.  The following routines can be
+ * defined; unless noted otherwise, they are optional, and can be
+ * filled in with a null pointer.
+ *
+ * int  (*open)(struct tty_struct * tty, struct file * filp);
+ *
+ *      This routine is called when a particular tty device is opened.
+ *      This routine is mandatory; if this routine is not filled in,
+ *      the attempted open will fail with ENODEV.
+ *     
+ * void (*close)(struct tty_struct * tty, struct file * filp);
+ *
+ *      This routine is called when a particular tty device is closed.
+ *
+ * int (*write)(struct tty_struct * tty,
+ *               const unsigned char *buf, int count);
+ *
+ *      This routine is called by the kernel to write a series of
+ *      characters to the tty device.  The characters may come from
+ *      user space or kernel space.  This routine will return the
+ *      number of characters actually accepted for writing.  This
+ *      routine is mandatory.
+ *
+ * void (*put_char)(struct tty_struct *tty, unsigned char ch);
+ *
+ *      This routine is called by the kernel to write a single
+ *      character to the tty device.  If the kernel uses this routine,
+ *      it must call the flush_chars() routine (if defined) when it is
+ *      done stuffing characters into the driver.  If there is no room
+ *      in the queue, the character is ignored.
+ *
+ * void (*flush_chars)(struct tty_struct *tty);
+ *
+ *      This routine is called by the kernel after it has written a
+ *      series of characters to the tty device using put_char().  
+ * 
+ * int  (*write_room)(struct tty_struct *tty);
+ *
+ *      This routine returns the numbers of characters the tty driver
+ *      will accept for queuing to be written.  This number is subject
+ *      to change as output buffers get emptied, or if the output flow
+ *      control is acted.
+ * 
+ * int  (*ioctl)(struct tty_struct *tty, struct file * file,
+ *          unsigned int cmd, unsigned long arg);
+ *
+ *      This routine allows the tty driver to implement
+ *      device-specific ioctl's.  If the ioctl number passed in cmd
+ *      is not recognized by the driver, it should return ENOIOCTLCMD.
+ * 
+ * void (*set_termios)(struct tty_struct *tty, struct termios * old);
+ *
+ *      This routine allows the tty driver to be notified when
+ *      device's termios settings have changed.  Note that a
+ *      well-designed tty driver should be prepared to accept the case
+ *      where old == NULL, and try to do something rational.
+ *
+ * void (*set_ldisc)(struct tty_struct *tty);
+ *
+ *      This routine allows the tty driver to be notified when the
+ *      device's termios settings have changed.
+ * 
+ * void (*throttle)(struct tty_struct * tty);
+ *
+ *      This routine notifies the tty driver that input buffers for
+ *      the line discipline are close to full, and it should somehow
+ *      signal that no more characters should be sent to the tty.
+ * 
+ * void (*unthrottle)(struct tty_struct * tty);
+ *
+ *      This routine notifies the tty drivers that it should signals
+ *      that characters can now be sent to the tty without fear of
+ *      overrunning the input buffers of the line disciplines.
+ * 
+ * void (*stop)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it should stop
+ *      outputting characters to the tty device.  
+ * 
+ * void (*start)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it resume sending
+ *      characters to the tty device.
+ * 
+ * void (*hangup)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it should hangup the
+ *      tty device.
+ *
+ * void (*break_ctl)(struct tty_stuct *tty, int state);
+ *
+ *      This optional routine requests the tty driver to turn on or
+ *      off BREAK status on the RS-232 port.  If state is -1,
+ *      then the BREAK status should be turned on; if state is 0, then
+ *      BREAK should be turned off.
+ *
+ *      If this routine is implemented, the high-level tty driver will
+ *      handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
+ *      TIOCCBRK.  Otherwise, these ioctls will be passed down to the
+ *      driver to handle.
+ *
+ * void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+ * 
+ *      This routine waits until the device has written out all of the
+ *      characters in its transmitter FIFO.
+ *
+ * void (*send_xchar)(struct tty_struct *tty, char ch);
+ *
+ *      This routine is used to send a high-priority XON/XOFF
+ *      character to the device.
+ */
+
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/cdev.h>
+
+struct tty_struct;
+
+struct tty_operations {
+        int  (*open)(struct tty_struct * tty, struct file * filp);
+        void (*close)(struct tty_struct * tty, struct file * filp);
+        int  (*write)(struct tty_struct * tty,
+                      const unsigned char *buf, int count);
+        void (*put_char)(struct tty_struct *tty, unsigned char ch);
+        void (*flush_chars)(struct tty_struct *tty);
+        int  (*write_room)(struct tty_struct *tty);
+        int  (*chars_in_buffer)(struct tty_struct *tty);
+        int  (*ioctl)(struct tty_struct *tty, struct file * file,
+                    unsigned int cmd, unsigned long arg);
+        void (*set_termios)(struct tty_struct *tty, struct termios * old);
+        void (*throttle)(struct tty_struct * tty);
+        void (*unthrottle)(struct tty_struct * tty);
+        void (*stop)(struct tty_struct *tty);
+        void (*start)(struct tty_struct *tty);
+        void (*hangup)(struct tty_struct *tty);
+        void (*break_ctl)(struct tty_struct *tty, int state);
+        void (*flush_buffer)(struct tty_struct *tty);
+        void (*set_ldisc)(struct tty_struct *tty);
+        void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+        void (*send_xchar)(struct tty_struct *tty, char ch);
+        int (*read_proc)(char *page, char **start, off_t off,
+                          int count, int *eof, void *data);
+        int (*write_proc)(struct file *file, const char __user *buffer,
+                          unsigned long count, void *data);
+        int (*tiocmget)(struct tty_struct *tty, struct file *file);
+        int (*tiocmset)(struct tty_struct *tty, struct file *file,
+                        unsigned int set, unsigned int clear);
+};
+
+struct tty_driver {
+        int     magic;          /* magic number for this structure */
+        struct cdev cdev;
+        struct module   *owner;
+        const char      *driver_name;
+        const char      *devfs_name;
+        const char      *name;
+        int     name_base;      /* offset of printed name */
+        int     major;          /* major device number */
+        int     minor_start;    /* start of minor device number */
+        int     minor_num;      /* number of *possible* devices */
+        int     num;            /* number of devices allocated */
+        short   type;           /* type of tty driver */
+        short   subtype;        /* subtype of tty driver */
+        struct termios init_termios; /* Initial termios */
+        int     flags;          /* tty driver flags */
+        int     refcount;       /* for loadable tty drivers */
+        struct proc_dir_entry *proc_entry; /* /proc fs entry */
+        struct tty_driver *other; /* only used for the PTY driver */
+
+        /*
+         * Pointer to the tty data structures
+         */
+        struct tty_struct **ttys;
+        struct termios **termios;
+        struct termios **termios_locked;
+        void *driver_state;     /* only used for the PTY driver */
+        
+        /*
+         * Interface routines from the upper tty layer to the tty
+         * driver.      Will be replaced with struct tty_operations.
+         */
+        int  (*open)(struct tty_struct * tty, struct file * filp);
+        void (*close)(struct tty_struct * tty, struct file * filp);
+        int  (*write)(struct tty_struct * tty,
+                      const unsigned char *buf, int count);
+        void (*put_char)(struct tty_struct *tty, unsigned char ch);
+        void (*flush_chars)(struct tty_struct *tty);
+        int  (*write_room)(struct tty_struct *tty);
+        int  (*chars_in_buffer)(struct tty_struct *tty);
+        int  (*ioctl)(struct tty_struct *tty, struct file * file,
+                    unsigned int cmd, unsigned long arg);
+        void (*set_termios)(struct tty_struct *tty, struct termios * old);
+        void (*throttle)(struct tty_struct * tty);
+        void (*unthrottle)(struct tty_struct * tty);
+        void (*stop)(struct tty_struct *tty);
+        void (*start)(struct tty_struct *tty);
+        void (*hangup)(struct tty_struct *tty);
+        void (*break_ctl)(struct tty_struct *tty, int state);
+        void (*flush_buffer)(struct tty_struct *tty);
+        void (*set_ldisc)(struct tty_struct *tty);
+        void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+        void (*send_xchar)(struct tty_struct *tty, char ch);
+        int (*read_proc)(char *page, char **start, off_t off,
+                          int count, int *eof, void *data);
+        int (*write_proc)(struct file *file, const char __user *buffer,
+                          unsigned long count, void *data);
+        int (*tiocmget)(struct tty_struct *tty, struct file *file);
+        int (*tiocmset)(struct tty_struct *tty, struct file *file,
+                        unsigned int set, unsigned int clear);
+
+        struct list_head tty_drivers;
+};
+
+extern struct list_head tty_drivers;
+
+struct tty_driver *alloc_tty_driver(int lines);
+void put_tty_driver(struct tty_driver *driver);
+void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
+
+/* tty driver magic number */
+#define TTY_DRIVER_MAGIC                0x5402
+
+/*
+ * tty driver flags
+ * 
+ * TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
+ *      termios setting when the last process has closed the device.
+ *      Used for PTY's, in particular.
+ * 
+ * TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
+ *      guarantee never not to set any special character handling
+ *      flags if ((IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR ||
+ *      !INPCK)).  That is, if there is no reason for the driver to
+ *      send notifications of parity and break characters up to the
+ *      line driver, it won't do so.  This allows the line driver to
+ *      optimize for this case if this flag is set.  (Note that there
+ *      is also a promise, if the above case is true, not to signal
+ *      overruns, either.)
+ *
+ * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
+ *      is only used by tty_register_driver().
+ *
+ * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
+ *      use dynamic memory keyed through the devpts filesystem.  This
+ *      is only applicable to the pty driver.
+ */
+#define TTY_DRIVER_INSTALLED            0x0001
+#define TTY_DRIVER_RESET_TERMIOS        0x0002
+#define TTY_DRIVER_REAL_RAW             0x0004
+#define TTY_DRIVER_NO_DEVFS             0x0008
+#define TTY_DRIVER_DEVPTS_MEM           0x0010
+
+/* tty driver types */
+#define TTY_DRIVER_TYPE_SYSTEM          0x0001
+#define TTY_DRIVER_TYPE_CONSOLE         0x0002
+#define TTY_DRIVER_TYPE_SERIAL          0x0003
+#define TTY_DRIVER_TYPE_PTY             0x0004
+#define TTY_DRIVER_TYPE_SCC             0x0005  /* scc driver */
+#define TTY_DRIVER_TYPE_SYSCONS         0x0006
+
+/* system subtypes (magic, used by tty_io.c) */
+#define SYSTEM_TYPE_TTY                 0x0001
+#define SYSTEM_TYPE_CONSOLE             0x0002
+#define SYSTEM_TYPE_SYSCONS             0x0003
+#define SYSTEM_TYPE_SYSPTMX             0x0004
+
+/* pty subtypes (magic, used by tty_io.c) */
+#define PTY_TYPE_MASTER                 0x0001
+#define PTY_TYPE_SLAVE                  0x0002
+
+/* serial subtype definitions */
+#define SERIAL_TYPE_NORMAL      1
+
+#endif /* #ifdef _LINUX_TTY_DRIVER_H */