Linux-2.6.12-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!
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
new file mode 100644
index 0000000..b368b29
--- /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 */