1/* $NetBSD: mcclock_tlsb.c,v 1.16 2008/03/29 05:42:45 tsutsui Exp $ */ 2 3/* 4 * Copyright (c) 1997 by Matthew Jacob 5 * NASA AMES Research Center. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35__KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.16 2008/03/29 05:42:45 tsutsui Exp $"); 36 37#include <sys/param.h> 38#include <sys/kernel.h> 39#include <sys/systm.h> 40#include <sys/device.h> 41 42#include <sys/bus.h> 43 44#include <alpha/tlsb/gbusvar.h> 45 46#include <alpha/tlsb/tlsbreg.h> /* XXX */ 47 48#include <dev/clock_subr.h> 49 50#include <dev/ic/mc146818reg.h> 51#include <dev/ic/mc146818var.h> 52 53#include <alpha/alpha/mcclockvar.h> 54 55#include "ioconf.h" 56 57#define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) 58/* 59 * Registers are 64 bytes apart (and 1 byte wide) 60 */ 61#define REGSHIFT 6 62 63struct mcclock_tlsb_softc { 64 struct mc146818_softc sc_mc146818; 65 unsigned long regbase; 66}; 67 68int mcclock_tlsb_match(device_t, cfdata_t, void *); 69void mcclock_tlsb_attach(device_t, device_t, void *); 70 71CFATTACH_DECL_NEW(mcclock_tlsb, sizeof(struct mcclock_tlsb_softc), 72 mcclock_tlsb_match, mcclock_tlsb_attach, NULL, NULL); 73 74static void mcclock_tlsb_write(struct mc146818_softc *, u_int, u_int); 75static u_int mcclock_tlsb_read(struct mc146818_softc *, u_int); 76 77 78int 79mcclock_tlsb_match(device_t parent, cfdata_t cf, void *aux) 80{ 81 struct gbus_attach_args *ga = aux; 82 83 if (strcmp(ga->ga_name, mcclock_cd.cd_name)) 84 return (0); 85 return (1); 86} 87 88void 89mcclock_tlsb_attach(device_t parent, device_t self, void *aux) 90{ 91 struct mcclock_tlsb_softc *tsc = device_private(self); 92 struct gbus_attach_args *ga = aux; 93 struct mc146818_softc *sc = &tsc->sc_mc146818; 94 95 /* XXX Should be bus.h'd, so we can accommodate the kn7aa. */ 96 tsc->regbase = TLSB_GBUS_BASE + ga->ga_offset; 97 98 sc->sc_dev = self; 99 sc->sc_mcread = mcclock_tlsb_read; 100 sc->sc_mcwrite = mcclock_tlsb_write; 101 102 mcclock_attach(sc); 103} 104 105static void 106mcclock_tlsb_write(struct mc146818_softc *sc, u_int reg, u_int val) 107{ 108 struct mcclock_tlsb_softc *tsc = (void *)sc; 109 unsigned char *ptr = (unsigned char *) 110 KV(tsc->regbase + (reg << REGSHIFT)); 111 112 *ptr = val; 113} 114 115static u_int 116mcclock_tlsb_read(struct mc146818_softc *sc, u_int reg) 117{ 118 struct mcclock_tlsb_softc *tsc = (void *)sc; 119 unsigned char *ptr = (unsigned char *) 120 KV(tsc->regbase + (reg << REGSHIFT)); 121 122 return *ptr; 123} 124