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      1 /*	$NetBSD: dtvar.h,v 1.6 2011/06/04 01:37:36 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _DTVAR_H_
     33 #define _DTVAR_H_
     34 
     35 #define	DT_DEVICE_NO(a)		(((a) - DT_ADDR_FIRST) >> 1)
     36 #define	DT_GET_SHORT(b0, b1)	(((b0) << 8) | (b1))
     37 
     38 struct dt_msg {
     39 	uint8_t	dst;
     40 	uint8_t	src;
     41 	uint8_t	ctl;
     42 
     43 	/* varzise, checksum byte at end */
     44 	uint8_t	body[DT_MAX_MSG_SIZE-3];
     45 
     46 	union {
     47 		SLIST_ENTRY(dt_msg) slist;
     48 		SIMPLEQ_ENTRY(dt_msg) simpleq;
     49 	} chain;
     50 };
     51 
     52 #define	DT_CTL(l, s, p)	\
     53     ((l & 0x1f) | ((s & 0x03) << 5) | ((p & 0x01) << 7))
     54 #define	DT_CTL_P(c)		((c >> 7) & 0x01)
     55 #define	DT_CTL_SUBADDR(c)	((c >> 5) & 0x03)
     56 #define	DT_CTL_LEN(c)		(c & 0x1f)
     57 
     58 struct dt_device {
     59 	void	*dtdv_arg;
     60 	void	(*dtdv_handler)(void *, struct dt_msg *);
     61 };
     62 
     63 struct dt_state {
     64 	volatile u_int	*ds_data;
     65 	volatile u_int	*ds_poll;
     66 	int		ds_bad_pkts;
     67 	int		ds_state;
     68 	int		ds_escaped;
     69 	int		ds_len;
     70 	int		ds_ptr;
     71 };
     72 
     73 struct dt_softc {
     74 	device_t	sc_dev;
     75 	struct dt_msg	sc_msg;
     76 	void		*sc_sih;
     77 	SLIST_HEAD(, dt_msg) sc_free;
     78 	SIMPLEQ_HEAD(, dt_msg) sc_queue;
     79 };
     80 
     81 struct dt_attach_args {
     82 	int	dta_addr;
     83 };
     84 
     85 #define	DT_GET_ERROR	-1
     86 #define	DT_GET_DONE	0
     87 #define	DT_GET_NOTYET	1
     88 
     89 void	dt_cninit(void);
     90 int	dt_identify(int, struct dt_ident *);
     91 int	dt_msg_get(struct dt_msg *, int);
     92 void	dt_msg_dump(struct dt_msg *);
     93 int	dt_establish_handler(struct dt_softc *, struct dt_device *,
     94     void *, void (*)(void *, struct dt_msg *));
     95 
     96 extern int	dt_kbd_addr;
     97 extern struct	dt_device dt_kbd_dv;
     98 extern int	dt_ms_addr;
     99 extern struct	dt_device dt_ms_dv;
    100 extern struct	dt_state dt_state;
    101 
    102 #endif	/* !_DTVAR_H_ */
    103