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hpc.c revision 1.1 
      1 /*	$NetBSD: hpc.c,v 1.1 2001/05/11 03:11:20 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 Soren S. Jorvang
      5  * Copyright (c) 2001 Rafal K. Boni
      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 for the
     19  *          NetBSD Project.  See http://www.netbsd.org/ for
     20  *          information about NetBSD.
     21  * 4. The name of the author may not be used to endorse or promote products
     22  *    derived from this software without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/device.h>
     39 #include <sys/reboot.h>
     40 
     41 #include <machine/machtype.h>
     42 
     43 #include <sgimips/gio/gioreg.h>
     44 #include <sgimips/gio/giovar.h>
     45 
     46 #include <sgimips/hpc/hpcvar.h>
     47 #include <sgimips/hpc/hpcreg.h>
     48 #include <sgimips/hpc/iocreg.h>
     49 
     50 #include "locators.h"
     51 
     52 struct hpc_softc {
     53 	struct device 		sc_dev;
     54 
     55 	bus_addr_t		sc_base;
     56 
     57 	bus_space_tag_t		sc_ct;
     58 	bus_space_handle_t	sc_ch;
     59 };
     60 
     61 extern int mach_type;		/* IPxx type */
     62 extern int mach_subtype;	/* subtype: eg., Guiness/Fullhouse for IP22 */
     63 extern int mach_boardrev;	/* machine board revision, in case it matters */
     64 
     65 static int	hpc_match(struct device *, struct cfdata *, void *);
     66 static void	hpc_attach(struct device *, struct device *, void *);
     67 static int	hpc_print(void *, const char *);
     68 static int	hpc_search(struct device *, struct cfdata *, void *);
     69 
     70 static int	hpc_power_intr(void *);
     71 
     72 struct cfattach hpc_ca = {
     73         sizeof(struct hpc_softc), hpc_match, hpc_attach
     74 };
     75 
     76 static int
     77 hpc_match(parent, match, aux)
     78 	struct device *parent;
     79 	struct cfdata *match;
     80 	void *aux;
     81 {
     82 	struct gio_attach_args* ga = aux;
     83 
     84 	/* Make sure it's actually there and readable */
     85 	if (badaddr((void*)MIPS_PHYS_TO_KSEG1(ga->ga_addr), sizeof(u_int32_t)))
     86 		return 0;
     87 
     88         return 1;
     89 }
     90 
     91 static void
     92 hpc_attach(parent, self, aux)
     93 	struct device *parent;
     94 	struct device *self;
     95 	void *aux;
     96 {
     97 	struct hpc_softc *sc = (struct hpc_softc *)self;
     98 	struct gio_attach_args* ga = aux;
     99 	struct hpc_attach_args ha;
    100 
    101 	/*
    102 	 * XXX
    103 	 */
    104 	printf("\n");
    105 
    106 	sc->sc_ct = 1;
    107 	sc->sc_ch = ga->ga_ioh;
    108 
    109 	sc->sc_base = ga->ga_addr;
    110 	config_search(hpc_search, self, &ha);
    111 
    112 	/*
    113 	 * XXXrkb: only true for first HPC, but didn't know where else to
    114 	 * shove it (ip22_intr is too early).  I suppose I should request
    115 	 * a post-config callback or something, but where?
    116 	 */
    117 	cpu_intr_establish(9, IPL_NONE, hpc_power_intr, sc);
    118 }
    119 
    120 static int
    121 hpc_print(aux, name)
    122 	void *aux;
    123 	const char *name;
    124 {
    125 	struct hpc_attach_args *ha = aux;
    126 
    127 	if (name != 0)
    128 		return QUIET;
    129 
    130 	if (ha->ha_offset != HPCCF_OFFSET_DEFAULT)
    131 		printf(" offset 0x%lx", ha->ha_offset);
    132 
    133 	return UNCONF;
    134 }
    135 
    136 static int
    137 hpc_search(parent, cf, aux)
    138 	struct device *parent;
    139 	struct cfdata *cf;
    140 	void *aux;
    141 {
    142 	struct hpc_attach_args *haa = aux;
    143 	struct hpc_softc *sc = (struct hpc_softc *)parent;
    144 
    145 	do {
    146 		haa->ha_offset = cf->cf_loc[HPCCF_OFFSET];
    147 
    148 		haa->ha_iot = 1;
    149 		haa->ha_ioh = MIPS_PHYS_TO_KSEG1(sc->sc_base);
    150 		if ((*cf->cf_attach->ca_match)(parent, cf, haa) > 0)
    151 			config_attach(parent, cf, haa, hpc_print);
    152 	} while (cf->cf_fstate == FSTATE_STAR);
    153 
    154 	return 0;
    155 }
    156 
    157 static int
    158 hpc_power_intr(void * arg)
    159 {
    160 	u_int32_t pwr_reg;
    161 
    162 	pwr_reg = *((volatile u_int32_t *)MIPS_PHYS_TO_KSEG1(0x1fbd9850));
    163 	*((volatile u_int32_t *)MIPS_PHYS_TO_KSEG1(0x1fbd9850)) = pwr_reg;
    164 
    165 	printf("hpc_power_intr: panel reg = %08x\n", pwr_reg);
    166 
    167 	if (pwr_reg & 2)
    168 	    cpu_reboot(RB_HALT, NULL);
    169 
    170 	return 1;
    171 }
    172 
    173