z8530var.h revision 1.5
1 /* $NetBSD: z8530var.h,v 1.5 1997/10/20 08:14:04 scottr Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Gordon W. Ross 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. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by the University of 28 * California, Berkeley and its contributors. 29 * 4. Neither the name of the University nor the names of its contributors 30 * may be used to endorse or promote products derived from this software 31 * without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 46 */ 47 48 #include <dev/ic/z8530sc.h> 49 50 /* 51 * Clock source info structure, added here so xzs_chanstate works 52 */ 53 struct zsclksrc { 54 long clk; /* clock rate, in MHz, present on signal line */ 55 int flags; /* Specifies how this source can be used 56 (RTxC divided, RTxC BRG, PCLK BRG, TRxC divided) 57 and also if the source is "external" and if it 58 is changeable (by an ioctl ex.). The 59 source usage flags are used by the tty 60 child. The other bits tell zsloadchannelregs 61 if it should call an md signal source 62 changing routine. ZSC_VARIABLE says if 63 an ioctl should be able to cahnge the 64 clock rate.*/ 65 }; 66 #define ZSC_PCLK 0x01 67 #define ZSC_RTXBRG 0x02 68 #define ZSC_RTXDIV 0x04 69 #define ZSC_TRXDIV 0x08 70 #define ZSC_VARIABLE 0x40 71 #define ZSC_EXTERN 0x80 72 73 #define ZSC_BRG 0x03 74 #define ZSC_DIV 0x0c 75 76 77 /* 78 * These are the machine-dependent (extended) variants of 79 * struct zs_chanstate and struct zsc_softc 80 */ 81 struct xzs_chanstate { 82 /* machine-independent part (First!)*/ 83 struct zs_chanstate xzs_cs; 84 /* machine-dependent extensions */ 85 int cs_hwflags; 86 int cs_chip; /* type of chip */ 87 /* Clock source info... */ 88 int cs_clock_count; /* how many signal sources available */ 89 struct zsclksrc cs_clocks[4]; /* info on available signal sources */ 90 long cs_cclk_flag; /* flag for current clock source */ 91 long cs_pclk_flag; /* flag for pending clock source */ 92 int cs_csource; /* current source # */ 93 int cs_psource; /* pending source # */ 94 }; 95 96 struct zsc_softc { 97 struct device zsc_dev; /* required first: base device */ 98 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 99 /* Machine-dependent part follows... */ 100 struct xzs_chanstate xzsc_xcs_store[2]; 101 }; 102 103 /* 104 * Functions to read and write individual registers in a channel. 105 * The ZS chip requires a 1.6 uSec. recovery time between accesses, 106 * and the Sun3 hardware does NOT take care of this for you. 107 * MacII hardware DOES dake care of the delay for us. :-) 108 * XXX - Then these should be inline functions! -gwr 109 * Some clock-chirped macs loose serial ports. It could be that the 110 * hardware delay is tied to the CPU speed, and that the minimum delay 111 * no longer's respected. For them, ZS_DELAY might help. 112 * XXX - no one seems to want to try and check this -wrs 113 */ 114 115 u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg)); 116 u_char zs_read_csr __P((struct zs_chanstate *cs)); 117 u_char zs_read_data __P((struct zs_chanstate *cs)); 118 119 void zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val)); 120 void zs_write_csr __P((struct zs_chanstate *cs, u_char val)); 121 void zs_write_data __P((struct zs_chanstate *cs, u_char val)); 122 123 /* XXX - Could define splzs() here instead of in psl.h */ 124 125 /* Hook for MD ioctl support */ 126 int zsmdioctl __P((struct zs_chanstate *cs, u_long cmd, caddr_t data)); 127 /* XXX - This is a bit gross... */ 128 #define ZS_MD_IOCTL zsmdioctl(cs, cmd, data) 129 130 /* Callback for "external" clock sources */ 131 void zsmd_setclock __P((struct zs_chanstate *cs)); 132 #define ZS_MD_SETCLK(cs) zsmd_setclock(cs) 133 134 135
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