1 /* $NetBSD: z8530var.h,v 1.11 2011/07/01 21:00:57 dyoung 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. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 #include <sys/bus.h> 44 #include <dev/ic/z8530sc.h> 45 46 struct zsc_softc { 47 device_t zsc_dev; /* base device */ 48 bus_space_tag_t zsc_bustag; /* bus space/DMA tags */ 49 bus_dma_tag_t zsc_dmatag; 50 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 51 52 /* Machine-dependent part follows... */ 53 int zsc_promunit; /* PROM's view of zs devices */ 54 int zsc_node; /* PROM node, if any */ 55 struct evcnt zsc_intrcnt; /* count interrupts */ 56 struct zs_chanstate zsc_cs_store[2]; 57 void *zsc_sicookie; /* softint(9) cookie */ 58 }; 59 60 /* 61 * Functions to read and write individual registers in a channel. 62 * The ZS chip requires a 1.6 uSec. recovery time between accesses. 63 * On the SparcStation the recovery time is handled in hardware. 64 * On the older Sun4 machine it isn't, and software must do it. 65 * 66 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?). 67 * Thus we leave in the delay (done in the functions below). 68 * XXX: (ABB) Think about this more. 69 * 70 * The functions below could be macros instead if we are concerned 71 * about the function call overhead where ZS_DELAY does nothing. 72 */ 73 74 uint8_t zs_read_reg(struct zs_chanstate *cs, uint8_t reg); 75 uint8_t zs_read_csr(struct zs_chanstate *cs); 76 uint8_t zs_read_data(struct zs_chanstate *cs); 77 78 void zs_write_reg(struct zs_chanstate *cs, uint8_t reg, uint8_t val); 79 void zs_write_csr(struct zs_chanstate *cs, uint8_t val); 80 void zs_write_data(struct zs_chanstate *cs, uint8_t val); 81 82 /* The sparc has splzs() in psl.h */ 83 84 /* We want to call it "zs" instead of "zsc" (sigh). */ 85 #ifndef ZSCCF_CHANNEL 86 #define ZSCCF_CHANNEL 0 87 #define ZSCCF_CHANNEL_DEFAULT -1 88 #endif 89 90 #undef cn_trap 91 #define cn_trap() zs_abort(NULL) 92