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/* trioserial.h: Definitions for the Aplio TRIO serial driver.

 *

 * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>,

 *                     D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,

 *                     The Silver Hammer Group, Ltd.

 *

 * Based on:

 *

 * drivers/char/68328serial.h

 *

 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)

 */

#ifndef _TRIO_SERIAL_H

#define _TRIO_SERIAL_H

#include <linux/config.h>

#include <asm/page.h>

#include <asm/arch-trio/hardware.h>

struct serial_struct {

        int     type;

        int     line;

        int     port;

        int     irq;

        int     flags;

        int     xmit_fifo_size;

        int     custom_divisor;

        int     baud_base;

        unsigned short  close_delay;

        char    reserved_char[2];

        int     hub6;  /* FIXME: We don't have AT&T Hub6 boards! */

        unsigned short  closing_wait; /* time to wait before closing */

        unsigned short  closing_wait2; /* no longer used... */

        int     reserved[4];

};

/*

 * For the close wait times, 0 means wait forever for serial port to

 * flush its output.  65535 means don't wait at all.

 */

#define S_CLOSING_WAIT_INF      0

#define S_CLOSING_WAIT_NONE     65535

/*

 * Definitions for S_struct (and serial_struct) flags field

 */

#define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 

                                   on the callout port */

#define S_FOURPORT  0x0002      /* Set OU1, OUT2 per AST Fourport settings */

#define S_SAK   0x0004  /* Secure Attention Key (Orange book) */

#define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */

#define S_SPD_MASK      0x0030

#define S_SPD_HI        0x0010  /* Use 56000 instead of 38400 bps */

#define S_SPD_VHI       0x0020  /* Use 115200 instead of 38400 bps */

#define S_SPD_CUST      0x0030  /* Use user-specified divisor */

#define S_SKIP_TEST     0x0040 /* Skip UART test during autoconfiguration */

#define S_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */

#define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */

#define S_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */

#define S_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */

#define S_FLAGS 0x0FFF  /* Possible legal S flags */

#define S_USR_MASK 0x0430       /* Legal flags that non-privileged

                                 * users can set or reset */

/* Internal flags used only by kernel/chr_drv/serial.c */

#define S_INITIALIZED   0x80000000 /* Serial port was initialized */

#define S_CALLOUT_ACTIVE        0x40000000 /* Call out device is active */

#define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */

#define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */

#define S_CLOSING               0x08000000 /* Serial port is closing */

#define S_CTS_FLOW              0x04000000 /* Do CTS flow control */

#define S_CHECK_CD              0x02000000 /* i.e., CLOCAL */

/* Software state per channel */

#ifdef __KERNEL__

/*

 * This is our internal structure for each serial port's state.

 *

 * Many fields are paralleled by the structure used by the serial_struct

 * structure.

 *

 * For definitions of the flags field, see tty.h

 */

struct trio_serial {

        char soft_carrier;  /* Use soft carrier on this channel */

        char break_abort;   /* Is serial console in, so process brk/abrt */

#if 0

        char cons_keyb;     /* Channel runs the keyboard */

        char cons_mouse;    /* Channel runs the mouse */

        char kgdb_channel;  /* Kgdb is running on this channel */

#endif

        char is_cons;       /* Is this our console. */

        /* We need to know the current clock divisor

         * to read the bps rate the chip has currently

         * loaded.

         */

        unsigned char clk_divisor;  /* May be 1, 16, 32, or 64 */

        int baud;

        int                     magic;

        int                     baud_base;

        int                     port;

        int                     irq;

        int                     irqmask;

        int                     flags;          /* defined in tty.h */

        int                     type;           /* UART type */

        int                     use_ints;

        struct uart_regs        *uart;

        struct tty_struct       *tty;

        int                     read_status_mask;

        int                     ignore_status_mask;

        int                     timeout;

        int                     xmit_fifo_size;

        int                     custom_divisor;

        int                     x_char; /* xon/xoff character */

        int                     close_delay;

        unsigned short          closing_wait;

        unsigned short          closing_wait2;

        unsigned long           event;

        unsigned long           last_active;

        int                     line;

        int                     count;      /* # of fd on device */

        int                     blocked_open; /* # of blocked opens */

        long                    session; /* Session of opening process */

        long                    pgrp; /* pgrp of opening process */

        unsigned char           *xmit_buf;

        unsigned char           *rx_buf;

        int                     xmit_head;

        int                     xmit_tail;

        int                     xmit_cnt;

        struct tq_struct        tqueue;

        struct tq_struct        tqueue_hangup;

        struct termios          normal_termios;

        struct termios          callout_termios;

        struct wait_queue       *open_wait;

        struct wait_queue       *close_wait;

};

#define SERIAL_MAGIC 0x5301

/*

 * The size of the serial xmit buffer is 1 page, or 4096 bytes

 */

#define SERIAL_XMIT_SIZE        PAGE_SIZE

#define SERIAL_RX_SIZE          PAGE_SIZE

/*

 * Events are used to schedule things to happen at timer-interrupt

 * time, instead of at rs interrupt time.

 */

#define RS_EVENT_WRITE_WAKEUP   0

#endif /* __KERNEL__ */

#if defined(CONFIG_M68328) || defined(CONFIG_M68EZ328)

#define BASE 0xfffff900

#define VSP(X) (*(volatile unsigned short *)(X))

#define VCP(X) (*(volatile unsigned char *)(X))

/* UART status and control */

#define USTCNT VSP(BASE)

#define USTCNT_EN               (1 << 15)

#define USTCNT_RXEN     (1 << 14)

#define USTCNT_TXEN     (1 << 13)

#define USTCNT_CLKMODE  (1 << 12)

#define USTCNT_PARITY   (1 << 11)

#define USTCNT_ODDEVEN  (1 << 10)

#define USTCNT_STOP     (1 <<  9)

#define USTCNT_WLEN     (1 <<  8)

#define USTCNT_CTSEN    (1 <<  6)

#define USTCNT_RXFULLEN (1 <<  5)

#define USTCNT_RXHALFEN (1 <<  4)

#define USTCNT_READYEN  (1 <<  3)

#define USTCNT_TXEMPTYEN        (1 <<  2)

#define USTCNT_TXHALFEN (1 <<  1)

#define USTCNT_TXAVAILEN        (1 <<  0)

/* UART baud control */

#define UBAUD VSP(BASE+2)

#define UBAUD_GPIOF     (1 << 15)

#define UBAUD_GPIOSC    (1 << 14)

#define UBAUD_GPIODDR   (1 << 13)

#define UBAUD_GPIOSRC   (1 << 12)

#define UBAUD_BAUDSRC   (1 << 11)

#define UBAUD_DIVMASK   (0x7 << 8)

#define UBAUD_GETDIV(X) ((0x7 & (X)) >> 8)

#define UBAUD_SETDIV(X) ((0x7 & (X)) << 8)

#define UBAUD_PRESCALEMASK      (0x3f << 0)

#define UBAUD_PRESCALE(X)       ((0x3f & (X)) << 0)

/* UART RX and status */

#define URX VSP(BASE + 4)

#define URX_FIFOFULL    (1<<15)

#define URX_FIFOHALF    (1<<14)

#define URX_DATARDY     (1<<13)

#define URX_OVERRUN     (1<<11)

#define URX_FRAMEERR    (1<<10)

#define URX_BREAK       (1<< 9)

#define URX_PARITYERR   (1<< 8)

#define URX_CHARSTAT    (URX_OVERRUN |URX_FRAMEERR |URX_BREAK |URX_PARITYERR)

#define URX_CHARMASK    (0xff << 0)

#define URX_CHAR(X)     ((0xff & (X)) << 0)

/* UART TX and status */

#define UTX VCP(BASE + 6)

#define UTX_FIFOEMPTY   (1<< 7)

#define UTX_FIFOHALF    (1<< 6)

#define UTX_TXAVAIL     (1<< 5)

#define UTX_SENDBREAK   (1<< 4)

#define UTX_IGNCTS      (1<< 3)

#define UTX_CTSSTAT     (1<< 1)

#define UTX_CTSDELTA    (1<< 0)

#define UTX_CHARMASK    (0xff << 0)

#define UTX_CHAR VCP(BASE + 7)

/* UART misc */

#define UMISC VSP(BASE + 8)

#define UMISC_CLKSRC    (1<<14)

#define UMISC_GENPTERR  (1<<13)

#define UMISC_LOOP      (1<<12)

#define UMISC_RTSCTL    (1<< 7)

#define UMISC_RTS       (1<< 6)

#define UMISC_IRDAEN    (1<< 5)

#define UMISC_LOOPIR    (1<< 4)

#define UMISC_RXPOL     (1<< 3)

#define UMISC_TXPOL     (1<< 2)

#endif /* CONFIG_MC68328 */

#endif /* !(_MC683XX_SERIAL_H) */