1 /* $NetBSD: z8530var.h,v 1.6 2002/09/30 09:43:13 abs Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 45 */ 46 47 #include <machine/bus.h> 48 #include <dev/ic/z8530sc.h> 49 50 #include "kbd.h" /* NKBD */ 51 52 #if (NKBD > 0) 53 /* 54 * Need to override cn_console_dev() for zstty and zskbd. 55 */ 56 #ifdef cn_isconsole 57 #undef cn_isconsole 58 #endif 59 extern struct consdev *cn_hw; 60 extern struct consdev *cn_tab; 61 #define cn_isconsole(d) ((d) == cn_tab->cn_dev || (d) == cn_hw->cn_dev) 62 #endif 63 64 struct zsc_softc { 65 struct device zsc_dev; /* base device */ 66 bus_space_tag_t zsc_bustag; /* bus space/dma tags */ 67 bus_dma_tag_t zsc_dmatag; 68 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 69 70 /* Machine-dependent part follows... */ 71 void *zsc_softintr; 72 int zsc_promunit; /* PROM's view of zs devices */ 73 int zsc_node; /* PROM node, if any */ 74 struct evcnt zsc_intrcnt; /* count interrupts */ 75 struct zs_chanstate zsc_cs_store[2]; 76 }; 77 78 /* 79 * Functions to read and write individual registers in a channel. 80 * The ZS chip requires a 1.6 uSec. recovery time between accesses. 81 * On the SparcStation the recovery time is handled in hardware. 82 * On the older Sun4 machine it isn't, and software must do it. 83 * 84 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?). 85 * Thus we leave in the delay (done in the functions below). 86 * XXX: (ABB) Think about this more. 87 * 88 * The functions below could be macros instead if we are concerned 89 * about the function call overhead where ZS_DELAY does nothing. 90 */ 91 92 u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg)); 93 u_char zs_read_csr __P((struct zs_chanstate *cs)); 94 u_char zs_read_data __P((struct zs_chanstate *cs)); 95 96 void zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val)); 97 void zs_write_csr __P((struct zs_chanstate *cs, u_char val)); 98 void zs_write_data __P((struct zs_chanstate *cs, u_char val)); 99 100 /* The sparc has splzs() in psl.h */ 101 102 /* We want to call it "zs" instead of "zsc" (sigh). */ 103 #ifndef ZSCCF_CHANNEL 104 #define ZSCCF_CHANNEL 0 105 #define ZSCCF_CHANNEL_DEFAULT -1 106 #endif 107 108 #undef cn_trap 109 #define cn_trap() zs_abort(NULL) 110