145 lines
4.6 KiB
C
145 lines
4.6 KiB
C
/* $NetBSD: kbdsunvar.h,v 1.5 2005/12/11 12:23:56 christos Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kbd.c 8.2 (Berkeley) 10/30/93
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*/
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/*
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* Keyboard driver - middle layer for sun keyboard off a serial line.
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* This code is used by kbd_zs and sunkbd (line discipline) drivers.
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*/
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/*
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* How many input characters we can buffer.
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* The port-specific var.h may override this.
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* Note: must be a power of two!
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*/
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#define KBD_RX_RING_SIZE 256
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#define KBD_RX_RING_MASK (KBD_RX_RING_SIZE - 1)
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/*
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* Output buffer. Only need a few chars.
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*/
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#define KBD_TX_RING_SIZE 16
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#define KBD_TX_RING_MASK (KBD_TX_RING_SIZE - 1)
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/*
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* Keyboard serial line speed defaults to 1200 bps.
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*/
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#define KBD_DEFAULT_BPS 1200
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#define KBD_RESET_TIMO 1000 /* mS. */
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struct kbd_sun_softc {
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/* upper layer (also inherits struct device) */
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struct kbd_softc k_kbd;
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union {
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void *ku_priv;
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struct zs_chanstate *ku_cs;
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} k_u;
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#define k_priv k_u.ku_priv
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#define k_cs k_u.ku_cs
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/*
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* The deviopen and deviclose routines are provided by the
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* underlying lower level driver and used as a back door when
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* opening and closing the internal device.
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*/
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int (*k_deviopen)(struct device *, int);
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int (*k_deviclose)(struct device *, int);
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/*
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* Callback provided by the lower layer (actual device driver).
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* Middle layer uses it to send commands to sun keyboard.
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*/
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void (*k_write_data)(struct kbd_sun_softc *, int);
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/* Was initialized once. */
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int k_isopen;
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/*
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* Magic sequence stuff (Stop-A, aka L1-A).
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* XXX: convert to cnmagic(9).
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*/
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char k_magic1_down;
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u_char k_magic1; /* L1 */
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u_char k_magic2; /* A */
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/* Expecting ID or layout byte from keyboard */
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int k_expect;
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#define KBD_EXPECT_IDCODE 1
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#define KBD_EXPECT_LAYOUT 2
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/* Flags to communicate with kbd_softint() */
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volatile int k_intr_flags;
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#define INTR_RX_OVERRUN 1
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#define INTR_TX_EMPTY 2
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#define INTR_ST_CHECK 4
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/* Transmit state */
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volatile int k_txflags;
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#define K_TXBUSY 1
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#define K_TXWANT 2
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/*
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* The transmit ring buffer.
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*/
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volatile u_int k_tbget; /* transmit buffer `get' index */
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volatile u_int k_tbput; /* transmit buffer `put' index */
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u_char k_tbuf[KBD_TX_RING_SIZE]; /* data */
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/*
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* The receive ring buffer.
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*/
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u_int k_rbget; /* ring buffer `get' index */
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volatile u_int k_rbput; /* ring buffer `put' index */
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u_short k_rbuf[KBD_RX_RING_SIZE]; /* rr1, data pairs */
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};
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/* Middle layer methods exported to the upper layer. */
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extern const struct kbd_ops kbd_ops_sun;
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/* Methods for the lower layer to call. */
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extern int kbd_sun_input(struct kbd_sun_softc *k, int);
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extern void kbd_sun_output(struct kbd_sun_softc *k, int c);
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extern void kbd_sun_start_tx(struct kbd_sun_softc *k);
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