1/* $NetBSD: mkclock_pnpbus.c,v 1.5 2008/04/28 20:23:33 martin Exp $ */ 2/*- 3 * Copyright (c) 2006 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Tim Rightnour 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* 32 * Mostek MK48T18 time-of-day chip attachment to pnpbus, using two 33 * 8-bit ports for address selection and one 8-bit port for data. 34 * 35 * Note that this is essentially a stub driver. We cannot attach the clock 36 * with this driver because the clock and nvram part are one in the same, and 37 * share the same IO ports. If we attach the clock, the NVRAM driver will 38 * fail to attach. Instead, we note that we have an mk48txx device, and in 39 * the nvram driver, we will attach the clock goop there. 40 * 41 * Therefore the probe will always fail. 42 */ 43 44#include <sys/cdefs.h> 45__KERNEL_RCSID(0, "$NetBSD: mkclock_pnpbus.c,v 1.5 2008/04/28 20:23:33 martin Exp $"); 46 47#include <sys/param.h> 48#include <sys/kernel.h> 49#include <sys/systm.h> 50#include <sys/device.h> 51 52#include <sys/bus.h> 53#include <machine/residual.h> 54#include <machine/chpidpnp.h> 55 56#include <dev/isa/isavar.h> 57#include <prep/pnpbus/pnpbusvar.h> 58 59extern int prep_clock_mk48txx; 60 61static int mkclock_pnpbus_probe(device_t, cfdata_t, void *); 62 63CFATTACH_DECL_NEW(mkclock_pnpbus, 0, mkclock_pnpbus_probe, NULL, NULL, NULL); 64 65static int 66mkclock_pnpbus_probe(device_t parent, cfdata_t cf, void *aux) 67{ 68 struct pnpbus_dev_attach_args *pna = aux; 69 70 if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 71 pna->subtype == RealTimeClock && pna->chipid == MOTmk48) 72 prep_clock_mk48txx = 1; 73 74 return 0; 75} 76