patch-2.3.9 linux/drivers/char/dz.h

• Lines: 243
• Date: Fri Jun 25 17:39:14 1999
• Orig file: v2.3.8/linux/drivers/char/dz.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.8/linux/drivers/char/dz.h linux/drivers/char/dz.h
@@ -0,0 +1,242 @@
+/*
+ * dz.h: Serial port driver for DECStations equiped 
+ *       with the DZ chipset.
+ *
+ * Copyright (C) 1998 Olivier A. D. Lebaillif 
+ *             
+ * Email: olivier.lebaillif@ifrsys.com
+ *
+ */
+#ifndef DZ_SERIAL_H
+#define DZ_SERIAL_H
+
+/*
+ * Definitions for the Control and Status Received.
+ */
+#define DZ_TRDY        0x8000                 /* Transmitter empty */
+#define DZ_TIE         0x4000                 /* Transmitter Interrupt Enable */
+#define DZ_RDONE       0x0080                 /* Receiver data ready */
+#define DZ_RIE         0x0040                 /* Receive Interrupt Enable */
+#define DZ_MSE         0x0020                 /* Master Scan Enable */
+#define DZ_CLR         0x0010                 /* Master reset */
+#define DZ_MAINT       0x0008                 /* Loop Back Mode */
+
+/*
+ * Definitions for the Received buffer. 
+ */
+#define DZ_RBUF_MASK   0x00FF                 /* Data Mask in the Receive Buffer */
+#define DZ_LINE_MASK   0x0300                 /* Line Mask in the Receive Buffer */
+#define DZ_DVAL        0x8000                 /* Valid Data indicator */
+#define DZ_OERR        0x4000                 /* Overrun error indicator */
+#define DZ_FERR        0x2000                 /* Frame error indicator */
+#define DZ_PERR        0x1000                 /* Parity error indicator */
+
+#define LINE(x) (x & DZ_LINE_MASK) >> 8       /* Get the line number from the input buffer */
+#define UCHAR(x) (unsigned char)(x & DZ_RBUF_MASK)
+
+/*
+ * Definitions for the Transmit Register.
+ */
+#define DZ_LINE_KEYBOARD 0x0001
+#define DZ_LINE_MOUSE    0x0002
+#define DZ_LINE_MODEM    0x0004
+#define DZ_LINE_PRINTER  0x0008
+
+#define DZ_MODEM_DTR     0x0400               /* DTR for the modem line (2) */
+
+/*
+ * Definitions for the Modem Status Register.
+ */
+#define DZ_MODEM_DSR     0x0200               /* DSR for the modem line (2) */
+
+/*
+ * Definitions for the Transmit Data Register.
+ */
+#define DZ_BRK0          0x0100               /* Break assertion for line 0 */
+#define DZ_BRK1          0x0200               /* Break assertion for line 1 */
+#define DZ_BRK2          0x0400               /* Break assertion for line 2 */
+#define DZ_BRK3          0x0800               /* Break assertion for line 3 */
+
+/*
+ * Definitions for the Line Parameter Register.
+ */
+#define DZ_KEYBOARD      0x0000               /* line 0 = keyboard */
+#define DZ_MOUSE         0x0001               /* line 1 = mouse */
+#define DZ_MODEM         0x0002               /* line 2 = modem */
+#define DZ_PRINTER       0x0003               /* line 3 = printer */
+
+#define DZ_CSIZE         0x0018               /* Number of bits per byte (mask) */
+#define DZ_CS5           0x0000               /* 5 bits per byte */
+#define DZ_CS6           0x0008               /* 6 bits per byte */
+#define DZ_CS7           0x0010               /* 7 bits per byte */
+#define DZ_CS8           0x0018               /* 8 bits per byte */
+
+#define DZ_CSTOPB        0x0020               /* 2 stop bits instead of one */ 
+
+#define DZ_PARENB        0x0040               /* Parity enable */
+#define DZ_PARODD        0x0080               /* Odd parity instead of even */
+
+#define DZ_CBAUD         0x0E00               /* Baud Rate (mask) */
+#define DZ_B50           0x0000
+#define DZ_B75           0x0100
+#define DZ_B110          0x0200
+#define DZ_B134          0x0300
+#define DZ_B150          0x0400
+#define DZ_B300          0x0500
+#define DZ_B600          0x0600
+#define DZ_B1200         0x0700 
+#define DZ_B1800         0x0800
+#define DZ_B2000         0x0900
+#define DZ_B2400         0x0A00
+#define DZ_B3600         0x0B00
+#define DZ_B4800         0x0C00
+#define DZ_B7200         0x0D00
+#define DZ_B9600         0x0E00
+
+#define DZ_CREAD         0x1000               /* Enable receiver */
+#define DZ_RXENAB        0x1000               /* enable receive char */
+/*
+ * Addresses for the DZ registers
+ */
+#define DZ_CSR       0x00            /* Control and Status Register */
+#define DZ_RBUF      0x08            /* Receive Buffer */
+#define DZ_LPR       0x08            /* Line Parameters Register */
+#define DZ_TCR       0x10            /* Transmitter Control Register */
+#define DZ_MSR       0x18            /* Modem Status Register */
+#define DZ_TDR       0x18            /* Transmit Data Register */
+
+
+#define DZ_NB_PORT 4
+
+#define DZ_XMIT_SIZE   4096                 /* buffer size */
+#define WAKEUP_CHARS   DZ_XMIT_SIZE/4
+
+#define DZ_EVENT_WRITE_WAKEUP   0
+
+#ifndef MIN
+#define MIN(a,b)        ((a) < (b) ? (a) : (b))
+
+#define DZ_INITIALIZED       0x80000000 /* Serial port was initialized */
+#define DZ_CALLOUT_ACTIVE    0x40000000 /* Call out device is active */
+#define DZ_NORMAL_ACTIVE     0x20000000 /* Normal device is active */
+#define DZ_BOOT_AUTOCONF     0x10000000 /* Autoconfigure port on bootup */
+#define DZ_CLOSING           0x08000000 /* Serial port is closing */
+#define DZ_CTS_FLOW          0x04000000 /* Do CTS flow control */
+#define DZ_CHECK_CD          0x02000000 /* i.e., CLOCAL */
+
+#define DZ_CLOSING_WAIT_INF  0
+#define DZ_CLOSING_WAIT_NONE 65535
+
+#define DZ_SPLIT_TERMIOS   0x0008 /* Separate termios for dialin/callout */
+#define DZ_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
+#define DZ_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
+
+struct dz_serial {
+  unsigned                port;                /* base address for the port */
+  int                     type;
+  int                     flags; 
+  int                     baud_base;
+  int                     blocked_open;
+  unsigned short          close_delay;
+  unsigned short          closing_wait;
+  unsigned short          line;                /* port/line number */
+  unsigned short          cflags;              /* line configuration flag */
+  unsigned short          x_char;              /* xon/xoff character */
+  unsigned short          read_status_mask;    /* mask for read condition */
+  unsigned short          ignore_status_mask;  /* mask for ignore condition */
+  unsigned long           event;               /* mask used in BH */
+  unsigned char           *xmit_buf;           /* Transmit buffer */
+  int                     xmit_head;           /* Position of the head */
+  int                     xmit_tail;           /* Position of the tail */
+  int                     xmit_cnt;            /* Count of the chars in the buffer */
+  int                     count;               /* indicates how many times it has been opened */
+  int                     magic;
+
+  struct async_icount     icount;              /* keep track of things ... */
+  struct tty_struct       *tty;                /* tty associated */
+  struct tq_struct        tqueue;              /* Queue for BH */
+  struct tq_struct        tqueue_hangup;
+  struct termios          normal_termios;
+  struct termios          callout_termios;
+  struct wait_queue       *open_wait;
+  struct wait_queue       *close_wait;
+
+  long                    session;             /* Session of opening process */
+  long                    pgrp;                /* pgrp of opening process */
+
+  unsigned char           is_console;          /* flag indicating a serial console */
+  unsigned char           is_initialized;
+};
+
+static struct dz_serial multi[DZ_NB_PORT];    /* Four serial lines in the DZ chip */
+static struct dz_serial *dz_console;
+static struct tty_driver serial_driver, callout_driver;
+
+static struct tty_struct *serial_table[DZ_NB_PORT];
+static struct termios *serial_termios[DZ_NB_PORT];
+static struct termios *serial_termios_locked[DZ_NB_PORT];
+
+static int serial_refcount;
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write.  We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open.
+ */
+static unsigned char *tmp_buf;
+static struct semaphore tmp_buf_sem = MUTEX;
+
+static char *dz_name = "DECstation DZ serial driver version ";
+static char *dz_version = "1.02";
+
+static inline unsigned short dz_in (struct dz_serial *, unsigned);
+static inline void dz_out (struct dz_serial *, unsigned, unsigned short);
+
+static inline void dz_sched_event (struct dz_serial *, int);
+static inline void receive_chars (struct dz_serial *);
+static inline void transmit_chars (struct dz_serial *);
+static inline void check_modem_status (struct dz_serial *);
+
+static void dz_stop (struct tty_struct *);
+static void dz_start (struct tty_struct *);
+static void dz_interrupt (int, void *, struct pt_regs *);
+static void do_serial_bh (void);
+static void do_softint (void *);
+static void do_serial_hangup (void *);
+static void change_speed (struct dz_serial *);
+static void dz_flush_chars (struct tty_struct *);
+static void dz_console_print (struct console *, const char *, unsigned int);
+static void dz_flush_buffer (struct tty_struct *);
+static void dz_throttle (struct tty_struct *);
+static void dz_unthrottle (struct tty_struct *);
+static void dz_send_xchar (struct tty_struct *, char);
+static void shutdown (struct dz_serial *);
+static void send_break (struct dz_serial *, int);
+static void dz_set_termios (struct tty_struct *, struct termios *);
+static void dz_close (struct tty_struct *, struct file *);
+static void dz_hangup (struct tty_struct *);
+static void show_serial_version (void);
+
+static int dz_write (struct tty_struct *, int, const unsigned char *, int);
+static int dz_write_room (struct tty_struct *);
+static int dz_chars_in_buffer (struct tty_struct *);
+static int startup (struct dz_serial *);
+static int get_serial_info (struct dz_serial *, struct serial_struct *);
+static int set_serial_info (struct dz_serial *, struct serial_struct *);
+static int get_lsr_info (struct dz_serial *, unsigned int *);
+static int dz_ioctl (struct tty_struct *, struct file *, unsigned int, unsigned long);
+static int block_til_ready (struct tty_struct *, struct file *, struct dz_serial *);
+static int dz_open (struct tty_struct *, struct file *);
+
+#ifdef MODULE
+int init_module (void)
+void cleanup_module (void)
+#endif
+
+#endif
+
+#endif /* DZ_SERIAL_H */