patch-2.2.11 linux/drivers/char/dz.h
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- Lines: 243
- Date:
Mon Aug 9 12:04:39 1999
- Orig file:
v2.2.10/linux/drivers/char/dz.h
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.2.10/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 */
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