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      1 /*	$NetBSD: mcclock_isa.c,v 1.15 2011/07/01 19:25:41 dyoung Exp $	*/
      2 /*	$OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $	*/
      3 /*	NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp 	*/
      4 
      5 /*
      6  * Copyright (c) 1988 University of Utah.
      7  * Copyright (c) 1992, 1993
      8  *	The Regents of the University of California.  All rights reserved.
      9  *
     10  * This code is derived from software contributed to Berkeley by
     11  * the Systems Programming Group of the University of Utah Computer
     12  * Science Department and Ralph Campbell.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  * 3. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  * from: Utah Hdr: clock.c 1.18 91/01/21
     39  *
     40  *	@(#)clock.c	8.1 (Berkeley) 6/10/93
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.15 2011/07/01 19:25:41 dyoung Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 
     50 #include <sys/bus.h>
     51 
     52 #include <dev/isa/isareg.h>
     53 #include <dev/isa/isavar.h>
     54 
     55 #include <dev/clock_subr.h>
     56 
     57 #include <dev/ic/mc146818reg.h>
     58 #include <dev/ic/mc146818var.h>
     59 
     60 #include <arc/isa/mcclock_isavar.h>
     61 
     62 int mcclock_isa_match(device_t, cfdata_t, void *);
     63 void mcclock_isa_attach(device_t, device_t, void *);
     64 
     65 CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
     66     mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
     67 
     68 /* Deskstation clock access code */
     69 static u_int mc_isa_read(struct mc146818_softc *, u_int);
     70 static void mc_isa_write(struct mc146818_softc *, u_int, u_int);
     71 
     72 int mcclock_isa_conf = 0;
     73 
     74 int
     75 mcclock_isa_match(device_t parent, cfdata_t cf, void *aux)
     76 {
     77 	struct isa_attach_args *ia = aux;
     78 	bus_space_handle_t ioh;
     79 
     80 	if (ia->ia_nio < 1 ||
     81 	    (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
     82 	     ia->ia_io[0].ir_addr != 0x70))
     83 		return 0;
     84 
     85 	if (ia->ia_niomem > 0 &&
     86 	    (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
     87 		return 0;
     88 
     89 	if (ia->ia_nirq > 0 &&
     90 	    (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ))
     91 		return 0;
     92 
     93 	if (ia->ia_ndrq > 0 &&
     94 	    (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
     95 		return 0;
     96 
     97 	if (!mcclock_isa_conf)
     98 		return 0;
     99 
    100 	if (bus_space_map(ia->ia_iot, 0x70, 0x02, 0, &ioh))
    101 		return 0;
    102 
    103 	bus_space_unmap(ia->ia_iot, ioh, 0x02);
    104 
    105 	ia->ia_nio = 1;
    106 	ia->ia_io[0].ir_addr = 0x70;
    107 	ia->ia_io[0].ir_size = 0x02;
    108 
    109 	ia->ia_niomem = 0;
    110 	ia->ia_nirq = 0;
    111 	ia->ia_ndrq = 0;
    112 
    113 	return 1;
    114 }
    115 
    116 void
    117 mcclock_isa_attach(device_t parent, device_t self, void *aux)
    118 {
    119 	struct mc146818_softc *sc = device_private(self);
    120 	struct isa_attach_args *ia = aux;
    121 
    122 	sc->sc_dev = self;
    123 	sc->sc_bst = ia->ia_iot;
    124 	if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr,
    125 	    ia->ia_io[0].ir_size, 0, &sc->sc_bsh))
    126 		panic("mcclock_isa_attach: couldn't map clock I/O space");
    127 
    128 	sc->sc_year0 = 1980;
    129 	sc->sc_mcread  = mc_isa_read;
    130 	sc->sc_mcwrite = mc_isa_write;
    131 
    132 	mc146818_attach(sc);
    133 
    134 	aprint_normal("\n");
    135 
    136 	/* Turn interrupts off, just in case. */
    137 	mc_isa_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
    138 }
    139 
    140 u_int
    141 mc_isa_read(struct mc146818_softc *sc, u_int reg)
    142 {
    143 
    144 	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
    145 	return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1);
    146 }
    147 
    148 void
    149 mc_isa_write(struct mc146818_softc *sc, u_int reg, u_int datum)
    150 {
    151 
    152 	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
    153 	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum);
    154 }
    155 
    156