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      1 /*	$NetBSD: cmu.c,v 1.14 2012/10/27 17:17:55 chs Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 SASAKI Takesi
      5  * Copyright (c) 1999, 2000, 2002 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/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: cmu.c,v 1.14 2012/10/27 17:17:55 chs Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 
     45 #include <mips/cpuregs.h>
     46 
     47 #include <machine/bus.h>
     48 #include <machine/debug.h>
     49 
     50 #include "opt_vr41xx.h"
     51 #include <hpcmips/vr/vr.h>
     52 #include <hpcmips/vr/vrcpudef.h>
     53 #include <hpcmips/vr/vripif.h>
     54 #include <hpcmips/vr/vripreg.h>
     55 
     56 #include <hpcmips/vr/cmureg.h>
     57 
     58 #include <machine/config_hook.h>
     59 
     60 struct vrcmu_softc {
     61 	bus_space_tag_t sc_iot;
     62 	bus_space_handle_t sc_ioh;
     63 	config_hook_tag sc_hardpower;
     64 	int sc_save;
     65 	struct vrcmu_chipset_tag sc_chipset;
     66 };
     67 
     68 int	vrcmu_match(device_t, cfdata_t, void *);
     69 void	vrcmu_attach(device_t, device_t, void *);
     70 int	vrcmu_supply(vrcmu_chipset_tag_t, u_int16_t, int);
     71 int	vrcmu_hardpower(void *, int, long, void *);
     72 
     73 CFATTACH_DECL_NEW(vrcmu, sizeof(struct vrcmu_softc),
     74     vrcmu_match, vrcmu_attach, NULL, NULL);
     75 
     76 int
     77 vrcmu_match(device_t parent, cfdata_t cf, void *aux)
     78 {
     79 
     80 	return (2);		/* 1st attach group of vrip */
     81 }
     82 
     83 void
     84 vrcmu_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct vrip_attach_args *va = aux;
     87 	struct vrcmu_softc *sc = device_private(self);
     88 
     89 	sc->sc_iot = va->va_iot;
     90 	sc->sc_chipset.cc_sc = sc;
     91 	sc->sc_chipset.cc_clock = vrcmu_supply;
     92 	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size,
     93 	    0 /* no flags */, &sc->sc_ioh)) {
     94 		printf(": can't map i/o space\n");
     95 		return;
     96 	}
     97 	printf ("\n");
     98 
     99 	vrip_register_cmu(va->va_vc, &sc->sc_chipset);
    100 	sc->sc_hardpower = config_hook(CONFIG_HOOK_PMEVENT,
    101 	    CONFIG_HOOK_PMEVENT_HARDPOWER,
    102 	    CONFIG_HOOK_SHARE,
    103 	    vrcmu_hardpower, sc);
    104 }
    105 
    106 int
    107 vrcmu_supply(vrcmu_chipset_tag_t cc, u_int16_t mask, int onoff)
    108 {
    109 	struct vrcmu_softc *sc = cc->cc_sc;
    110 	u_int16_t reg;
    111 
    112 	reg = bus_space_read_2(sc->sc_iot, sc->sc_ioh, 0);
    113 #ifdef VRCMU_VERBOSE
    114 	printf("cmu register(enter):");
    115 	dbg_bit_print(reg);
    116 #endif
    117 	if (onoff)
    118 		reg |= mask;
    119 	else
    120 		reg &= ~mask;
    121 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, reg);
    122 #ifdef VRCMU_VERBOSE
    123 	printf("cmu register(exit) :");
    124 	dbg_bit_print(reg);
    125 #endif
    126 	return (0);
    127 }
    128 
    129 int
    130 vrcmu_hardpower(void *ctx, int type, long id, void *msg)
    131 {
    132 	struct vrcmu_softc *sc = ctx;
    133 	int why = (int)msg;
    134 
    135 	switch (why) {
    136 	case PWR_STANDBY:
    137 	case PWR_SUSPEND:
    138 		sc->sc_save = bus_space_read_2(sc->sc_iot, sc->sc_ioh, 0);
    139 		bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, 0);
    140 		break;
    141 	case PWR_RESUME:
    142 		bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, sc->sc_save);
    143 		break;
    144 	}
    145 	return (0);
    146 }
    147