FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/hd44780var.h

     /* $NetBSD: hd44780var.h,v 1.8 2015/09/06 06:01:00 dholland Exp $ */
     
     /*
      * Copyright (c) 2002 Dennis I. Chernoivanov
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _DEV_IC_HD44780VAR_H_
    #define _DEV_IC_HD44780VAR_H_
    
    #include <sys/ioccom.h>
    
    /* IOCTL definitions */
    #define HLCD_DISPCTL            _IOW('h',   1, struct hd44780_dispctl)
    #define HLCD_RESET              _IO('h',    2)
    #define HLCD_CLEAR              _IO('h',    3)
    #define HLCD_CURSOR_LEFT        _IO('h',    4)
    #define HLCD_CURSOR_RIGHT       _IO('h',    5)
    #define HLCD_GET_CURSOR_POS     _IOR('h',   6, struct hd44780_io)
    #define HLCD_SET_CURSOR_POS     _IOW('h',   7, struct hd44780_io)
    #define HLCD_GETC               _IOR('h',   8, struct hd44780_io)
    #define HLCD_PUTC               _IOW('h',   9, struct hd44780_io)
    #define HLCD_SHIFT_LEFT         _IO('h',   10)
    #define HLCD_SHIFT_RIGHT        _IO('h',   11)
    #define HLCD_HOME               _IO('h',   12)
    #define HLCD_WRITE              _IOWR('h', 13, struct hd44780_io)
    #define HLCD_READ               _IOWR('h', 14, struct hd44780_io)
    #define HLCD_REDRAW             _IOW('h',  15, struct hd44780_io)
    #define HLCD_WRITE_INST         _IOW('h',  16, struct hd44780_io)
    #define HLCD_WRITE_DATA         _IOW('h',  17, struct hd44780_io)
    #define HLCD_GET_INFO           _IOR('h',  18, struct hd44780_info)
    #define HLCD_GET_CHIPNO         _IOR('h',  19, uint8_t)
    #define HLCD_SET_CHIPNO         _IOW('h',  20, uint8_t)
    
    struct hd44780_dispctl {
            uint8_t chip;
            uint8_t display_on:1,
                    blink_on:1,
                    cursor_on:1;
    };
    
    struct hd44780_io {
            uint8_t chip;
            uint8_t dat;
            uint8_t len;
            uint8_t buf[HD_MAX_CHARS];
    };
    
    struct hd44780_info {
            uint8_t lines;
            uint8_t phys_rows;
            uint8_t virt_rows;
    
            uint8_t is_wide:1,
                    is_bigfont:1,
                    kp_present:1;
    };
    
    #ifdef _KERNEL
    
    struct  hlcd_screen {
            int hlcd_curon;
            int hlcd_curx;
            int hlcd_cury;
            uint8_t *image;                 /* characters of screen */
            struct hd44780_chip *hlcd_sc;
    };
    
    /* HLCD driver structure */
    struct hd44780_chip {
    #define HD_8BIT                 0x01    /* 8-bit if set, 4-bit otherwise */
    #define HD_MULTILINE            0x02    /* 2 lines if set, 1 otherwise */
    #define HD_BIGFONT              0x04    /* 5x10 if set, 5x8 otherwise */
    #define HD_KEYPAD               0x08    /* if set, keypad is connected */
    #define HD_UP                   0x10    /* if set, lcd has been initialized */
    #define HD_TIMEDOUT             0x20    /* lcd has recently stopped talking */
    #define HD_MULTICHIP            0x40    /* two HD44780 controllers (4-line) */
           uint8_t sc_flags;
   
           uint8_t sc_cols;                /* visible columns */
           uint8_t sc_vcols;               /* virtual columns (normally 40) */
           uint8_t sc_dev_ok;
           uint8_t sc_curchip;
   
           bus_space_tag_t sc_iot;
   
           bus_space_handle_t sc_ioir;     /* instruction register */
           bus_space_handle_t sc_iodr;     /* data register */
   
           device_t sc_dev;                /* Pointer to parent device */
           struct hlcd_screen sc_screen;   /* currently displayed screen copy */
           struct hlcd_screen *sc_curscr;  /* active screen */
           struct callout redraw;          /* wsdisplay refresh/redraw timer */
   
           /* Generic write/read byte entries. */
           void     (* sc_writereg)(struct hd44780_chip *, uint32_t, uint32_t,
             uint8_t);
           uint8_t (* sc_readreg)(struct hd44780_chip *, uint32_t, uint32_t);
   };
   
   #define hd44780_ir_write(sc, en, dat) \
           do {                                                            \
                   hd44780_busy_wait(sc, (en));                                    \
                   (sc)->sc_writereg((sc), (en), 0, (dat));                \
           } while(0)
   
   #define hd44780_ir_read(sc, en) \
           (sc)->sc_readreg((sc), (en), 0)
   
   #define hd44780_dr_write(sc, en, dat) \
           (sc)->sc_writereg((sc), (en), 1, (dat))
   
   #define hd44780_dr_read(sc, en) \
           (sc)->sc_readreg((sc), (en), 1)
   
   void hd44780_attach_subr(struct hd44780_chip *);
   void hd44780_busy_wait(struct hd44780_chip *, uint32_t);
   int  hd44780_init(struct hd44780_chip *);
   int  hd44780_chipinit(struct hd44780_chip *, uint32_t);
   int  hd44780_ioctl_subr(struct hd44780_chip *, u_long, void *);
   void hd44780_ddram_redraw(struct hd44780_chip *, uint32_t, struct hd44780_io *);
   
   #define HD_DDRAM_READ   0x0
   #define HD_DDRAM_WRITE  0x1
   int  hd44780_ddram_io(struct hd44780_chip *, uint32_t, struct hd44780_io *,
       uint8_t);
   
   #if defined(HD44780_STD_WIDE) || defined(HD44780_STD_SHORT)
   void     hd44780_writereg(struct hd44780_chip *, uint32_t, uint32_t, uint8_t);
   uint8_t hd44780_readreg(struct hd44780_chip *, uint32_t, uint32_t);
   #endif
   
   #endif /* _KERNEL */
   
   #endif /* _DEV_IC_HD44780VAR_H_ */

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