1 /* $OpenBSD: z8530var.h,v 1.5 2003/06/02 23:27:56 millert Exp $ */ 2 /* $NetBSD: z8530var.h,v 1.4 2000/11/08 23:41:42 eeh Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by the University of 15 * California, Lawrence Berkeley Laboratory. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 42 */ 43 44 #include <machine/bus.h> 45 #include <sparc64/dev/z8530sc.h> 46 47 /* 48 * Need to override cn_console_dev() for zstty and zskbd. 49 */ 50 #ifdef cn_isconsole 51 #undef cn_isconsole 52 #endif 53 extern struct consdev *cn_hw; 54 extern struct consdev *cn_tab; 55 #define cn_isconsole(d) ((d) == cn_tab->cn_dev || (d) == cn_hw->cn_dev) 56 57 struct zsc_softc { 58 struct device zsc_dev; /* base device */ 59 bus_space_tag_t zsc_bustag; /* bus space/dma tags */ 60 bus_dma_tag_t zsc_dmatag; 61 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 62 63 /* Machine-dependent part follows... */ 64 void *zsc_softintr; 65 int zsc_promunit; /* PROM's view of zs devices */ 66 int zsc_node; /* PROM node, if any */ 67 struct evcnt zsc_intrcnt; /* count interrupts */ 68 struct zs_chanstate zsc_cs_store[2]; 69 }; 70 71 /* 72 * Functions to read and write individual registers in a channel. 73 * The ZS chip requires a 1.6 uSec. recovery time between accesses. 74 * On the SparcStation the recovery time is handled in hardware. 75 * On the older Sun4 machine it isn't, and software must do it. 76 * 77 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?). 78 * Thus we leave in the delay (done in the functions below). 79 * XXX: (ABB) Think about this more. 80 * 81 * The functions below could be macros instead if we are concerned 82 * about the function call overhead where ZS_DELAY does nothing. 83 */ 84 85 u_char zs_read_reg(struct zs_chanstate *cs, u_char reg); 86 u_char zs_read_csr(struct zs_chanstate *cs); 87 u_char zs_read_data(struct zs_chanstate *cs); 88 89 void zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val); 90 void zs_write_csr(struct zs_chanstate *cs, u_char val); 91 void zs_write_data(struct zs_chanstate *cs, u_char val); 92 93 /* The sparc has splzs() in psl.h */ 94 95 /* We want to call it "zs" instead of "zsc" (sigh). */ 96 #ifndef ZSCCF_CHANNEL 97 #define ZSCCF_CHANNEL 0 98 #define ZSCCF_CHANNEL_DEFAULT -1 99 #endif 100