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cmu.c revision 1.8 
      1 /*	$NetBSD: cmu.c,v 1.8 2002/01/29 18:53:21 uch Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 SASAKI Takesi
      5  * Copyright (c) 1999,2000 PocketBSD Project. All rights reserved.
      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, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the PocketBSD project
     19  *	and its contributors.
     20  * 4. Neither the name of the project nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/device.h>
     41 
     42 #include <mips/cpuregs.h>
     43 
     44 #include <machine/bus.h>
     45 #include <machine/debug.h>
     46 
     47 #include "opt_vr41xx.h"
     48 #include <hpcmips/vr/vr.h>
     49 #include <hpcmips/vr/vrcpudef.h>
     50 #include <hpcmips/vr/vripif.h>
     51 #include <hpcmips/vr/vripreg.h>
     52 
     53 #include <hpcmips/vr/cmureg.h>
     54 
     55 #include <machine/config_hook.h>
     56 
     57 struct vrcmu_softc {
     58 	struct device sc_dev;
     59 	bus_space_tag_t sc_iot;
     60 	bus_space_handle_t sc_ioh;
     61 	config_hook_tag sc_hardpower;
     62 	int sc_save;
     63 	struct vrcmu_chipset_tag sc_chipset;
     64 };
     65 
     66 int	vrcmu_match(struct device *, struct cfdata *, void *);
     67 void	vrcmu_attach(struct device *, struct device *, void *);
     68 int	vrcmu_supply(vrcmu_chipset_tag_t, u_int16_t, int);
     69 int	vrcmu_hardpower(void *, int, long, void *);
     70 
     71 struct cfattach vrcmu_ca = {
     72 	sizeof(struct vrcmu_softc), vrcmu_match, vrcmu_attach
     73 };
     74 
     75 int
     76 vrcmu_match(struct device *parent, struct cfdata *cf, void *aux)
     77 {
     78 
     79 	return (2);		/* 1st attach group of vrip */
     80 }
     81 
     82 void
     83 vrcmu_attach(struct device *parent, struct device *self, void *aux)
     84 {
     85 	struct vrip_attach_args *va = aux;
     86 	struct vrcmu_softc *sc = (void *)self;
     87 
     88 	sc->sc_iot = va->va_iot;
     89 	sc->sc_chipset.cc_sc = sc;
     90 	sc->sc_chipset.cc_clock = vrcmu_supply;
     91 	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size,
     92 	    0 /* no flags */, &sc->sc_ioh)) {
     93 		printf(": can't map i/o space\n");
     94 		return;
     95 	}
     96 	printf ("\n");
     97 
     98 	vrip_register_cmu(va->va_vc, &sc->sc_chipset);
     99 	sc->sc_hardpower = config_hook(CONFIG_HOOK_PMEVENT,
    100 	    CONFIG_HOOK_PMEVENT_HARDPOWER,
    101 	    CONFIG_HOOK_SHARE,
    102 	    vrcmu_hardpower, sc);
    103 }
    104 
    105 /* For serial console */
    106 void
    107 __vrcmu_supply(u_int16_t mask, int onoff)
    108 {
    109 	u_int16_t reg;
    110 	u_int32_t addr;
    111 
    112 	addr = MIPS_PHYS_TO_KSEG1(VRIP_CMU_ADDR);
    113 	reg = *((volatile u_int16_t *)addr);
    114 	if (onoff)
    115 		reg |= mask;
    116 	else
    117 		reg &= ~mask;
    118 	*((volatile u_int16_t *)addr) = reg;
    119 }
    120 
    121 int
    122 vrcmu_supply(vrcmu_chipset_tag_t cc, u_int16_t mask, int onoff)
    123 {
    124 	struct vrcmu_softc *sc = cc->cc_sc;
    125 	u_int16_t reg;
    126 
    127 	reg = bus_space_read_2(sc->sc_iot, sc->sc_ioh, 0);
    128 #ifdef VRCMU_VERBOSE
    129 	printf("cmu register(enter):");
    130 	dbg_bit_print(reg);
    131 #endif
    132 	if (onoff)
    133 		reg |= mask;
    134 	else
    135 		reg &= ~mask;
    136 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, reg);
    137 #ifdef VRCMU_VERBOSE
    138 	printf("cmu register(exit) :");
    139 	dbg_bit_print(reg);
    140 #endif
    141 	return (0);
    142 }
    143 
    144 int
    145 vrcmu_hardpower(void *ctx, int type, long id, void *msg)
    146 {
    147 	struct vrcmu_softc *sc = ctx;
    148 	int why = (int)msg;
    149 
    150 	switch (why) {
    151 	case PWR_STANDBY:
    152 	case PWR_SUSPEND:
    153 		sc->sc_save = bus_space_read_2(sc->sc_iot, sc->sc_ioh, 0);
    154 		bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, 0);
    155 		break;
    156 	case PWR_RESUME:
    157 		bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, sc->sc_save);
    158 		break;
    159 	}
    160 	return (0);
    161 }
    162