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      1 /*      $NetBSD: epcomvar.h,v 1.9 2021/11/21 08:44:28 skrll Exp $        */
      2 /*-
      3  * Copyright (c) 2004 Jesse Off
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     24  * SUCH DAMAGE.
     25  *
     26  */
     27 
     28 #ifndef _EPCOMVAR_H_
     29 #define _EPCOMVAR_H_
     30 
     31 #ifdef RND_COM
     32 #include <sys/rndsource.h>
     33 #endif
     34 
     35 /* Hardware flag masks */
     36 #define COM_HW_NOIEN		0x01
     37 #define COM_HW_DEV_OK		0x20
     38 #define COM_HW_CONSOLE		0x40
     39 #define COM_HW_KGDB		0x80
     40 
     41 #define RX_TTY_BLOCKED		0x01
     42 #define RX_TTY_OVERFLOWED	0x02
     43 #define RX_IBUF_BLOCKED		0x04
     44 #define RX_IBUF_OVERFLOWED	0x08
     45 #define RX_ANY_BLOCK		0x0f
     46 
     47 #define EPCOM_RING_SIZE	2048
     48 
     49 struct epcom_softc {
     50 	device_t		sc_dev;
     51 	bus_addr_t		sc_hwbase;
     52 	bus_space_tag_t		sc_iot;
     53 	bus_space_handle_t 	sc_ioh;
     54 
     55 	void			*sc_si;
     56 
     57 	struct tty		*sc_tty;
     58 
     59 	u_char			*sc_rbuf, *sc_ebuf;
     60 
     61  	u_char			*sc_tba;
     62  	u_int			sc_tbc;
     63 
     64 	u_char			*volatile sc_rbget,
     65 				*volatile sc_rbput;
     66  	volatile u_int		sc_rbavail;
     67 
     68 	/* status flags */
     69 	int			sc_hwflags, sc_swflags;
     70 
     71 	volatile u_int		sc_rx_flags,
     72 				sc_tx_busy,
     73 				sc_tx_done,
     74 				sc_tx_stopped,
     75 				sc_st_check,
     76 				sc_rx_ready;
     77 
     78 	/* control registers */
     79 	u_int			sc_lcrlo;
     80 	u_int			sc_lcrmid;
     81 	u_int			sc_lcrhi;
     82 	u_int			sc_ctrl;
     83 
     84 	/* power management hooks */
     85 	int			(*enable)(struct epcom_softc *);
     86 	int			(*disable)(struct epcom_softc *);
     87 
     88 	int			enabled;
     89 #ifdef RND_COM
     90 	krndsource_t  rnd_source;
     91 #endif
     92 };
     93 
     94 void	epcom_attach_subr(struct epcom_softc *);
     95 
     96 int	epcomintr(void* arg);
     97 int	epcomcnattach(bus_space_tag_t, bus_addr_t, bus_space_handle_t,
     98 		       int, tcflag_t);
     99 int	epcom_kgdb_attach(bus_space_tag_t, bus_addr_t, int, tcflag_t);
    100 
    101 #endif /* _EPCOMVAR_H_ */
    102