Home | History | Annotate | Line # | Download | only in tc
dtvar.h revision 1.3 
      1 /*	$NetBSD: dtvar.h,v 1.3 2003/12/23 09:39:46 ad 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _DTVAR_H_
     40 #define _DTVAR_H_
     41 
     42 #define	DT_DEVICE_NO(a)		(((a) - DT_ADDR_FIRST) >> 1)
     43 #define	DT_GET_SHORT(b0, b1)	(((b0) << 8) | (b1))
     44 
     45 struct dt_msg {
     46 	uint8_t	dst;
     47 	uint8_t	src;
     48 	uint8_t	ctl;
     49 
     50 	/* varzise, checksum byte at end */
     51 	uint8_t	body[DT_MAX_MSG_SIZE-3];
     52 
     53 	union {
     54 		SLIST_ENTRY(dt_msg) slist;
     55 		SIMPLEQ_ENTRY(dt_msg) simpleq;
     56 	} chain;
     57 };
     58 
     59 #define	DT_CTL(l, s, p)	\
     60     ((l & 0x1f) | ((s & 0x03) << 5) | ((p & 0x01) << 7))
     61 #define	DT_CTL_P(c)		((c >> 7) & 0x01)
     62 #define	DT_CTL_SUBADDR(c)	((c >> 5) & 0x03)
     63 #define	DT_CTL_LEN(c)		(c & 0x1f)
     64 
     65 struct dt_device {
     66 	struct	device *dtdv_dv;
     67 	void	(*dtdv_handler)(void *, struct dt_msg *);
     68 };
     69 
     70 struct dt_state {
     71 	volatile u_int	*ds_data;
     72 	volatile u_int	*ds_poll;
     73 	int		ds_bad_pkts;
     74 	int		ds_state;
     75 	int		ds_escaped;
     76 	int		ds_len;
     77 	int		ds_ptr;
     78 };
     79 
     80 struct dt_softc {
     81 	struct device	sc_dv;
     82 	struct dt_msg	sc_msg;
     83 	void		*sc_sih;
     84 	SLIST_HEAD(, dt_msg) sc_free;
     85 	SIMPLEQ_HEAD(, dt_msg) sc_queue;
     86 };
     87 
     88 struct dt_attach_args {
     89 	int	dta_addr;
     90 };
     91 
     92 #define	DT_GET_ERROR	-1
     93 #define	DT_GET_DONE	0
     94 #define	DT_GET_NOTYET	1
     95 
     96 void	dt_cninit(void);
     97 int	dt_identify(int, struct dt_ident *);
     98 int	dt_msg_get(struct dt_msg *, int);
     99 void	dt_msg_dump(struct dt_msg *);
    100 int	dt_establish_handler(struct dt_softc *, struct dt_device *,
    101     struct device *, void (*)(void *, struct dt_msg *));
    102 
    103 extern int	dt_kbd_addr;
    104 extern struct	dt_device dt_kbd_dv;
    105 extern int	dt_ms_addr;
    106 extern struct	dt_device dt_ms_dv;
    107 extern struct	dt_state dt_state;
    108 
    109 #endif	/* !_DTVAR_H_ */
    110