| /* |
| * 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 |
| |
| #define SERIAL_MAGIC 0x5301 |
| |
| /* |
| * 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; |
| wait_queue_head_t open_wait; |
| wait_queue_head_t 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 DECLARE_MUTEX(tmp_buf_sem); |
| |
| 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 */ |
