d1400b88f9
keyboard error is received. For zs(4) and com(4), -1 causes the driver to flush it's buffer. This should eliminate missed keyboard codes, such as the "key repeats forever until another key is hit" problem that happens because the keyboard idle code gets flushed from the input buffer.
145 lines
4.6 KiB
C
145 lines
4.6 KiB
C
/* $NetBSD: kbdsunvar.h,v 1.4 2005/02/20 22:17:28 heas 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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