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      1 /*	$NetBSD: obio_wdt.c,v 1.8 2019/01/08 19:41:10 jdolecek Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Microsoft
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *     This product includes software developed by Microsoft
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     20  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTERS BE LIABLE FOR ANY DIRECT,
     23  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * obio attachment for GEMINI watchdog timers
     34  */
     35 #include "opt_gemini.h"
     36 #include "locators.h"
     37 
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: obio_wdt.c,v 1.8 2019/01/08 19:41:10 jdolecek Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/callout.h>
     43 #include <sys/cdefs.h>
     44 #include <sys/device.h>
     45 #include <sys/kernel.h>
     46 #include <sys/systm.h>
     47 #include <sys/wdog.h>
     48 
     49 #include <sys/bus.h>
     50 #include <dev/sysmon/sysmonvar.h>
     51 
     52 #include <arm/gemini/gemini_obiovar.h>
     53 #include <arm/gemini/gemini_wdtvar.h>
     54 #include <arm/gemini/gemini_reg.h>
     55 
     56 static int geminiwdt_match(device_t, cfdata_t, void *);
     57 static void geminiwdt_attach(device_t, device_t, void *);
     58 
     59 CFATTACH_DECL_NEW(obiowdt, sizeof(struct geminiwdt_softc),
     60     geminiwdt_match, geminiwdt_attach, NULL, NULL);
     61 
     62 static int
     63 geminiwdt_match(device_t parent, cfdata_t cf, void *aux)
     64 {
     65 	struct obio_attach_args *obio = aux;
     66 
     67 	if (obio->obio_addr == OBIOCF_ADDR_DEFAULT)
     68 		panic("geminiwdt must have addr specified in config.");
     69 
     70 	if (obio->obio_addr == GEMINI_WATCHDOG_BASE)
     71 		return 1;
     72 
     73 	return 0;
     74 }
     75 
     76 static void
     77 geminiwdt_attach(device_t parent, device_t self, void *aux)
     78 {
     79 	geminiwdt_softc_t *sc = device_private(self);
     80 	struct obio_attach_args *obio = aux;
     81 
     82 	sc->sc_dev = self;
     83 	sc->sc_addr = obio->obio_addr;
     84 	sc->sc_size = (obio->obio_size == OBIOCF_SIZE_DEFAULT)
     85 		? GEMINI_WDT_WDINTERLEN + 4
     86 		: obio->obio_size;
     87 
     88 	sc->sc_smw.smw_name = device_xname(sc->sc_dev);
     89 	sc->sc_smw.smw_cookie = sc;
     90 	sc->sc_smw.smw_setmode = geminiwdt_setmode;
     91 	sc->sc_smw.smw_tickle = geminiwdt_tickle;
     92 	sc->sc_smw.smw_period = 0;
     93 	sc->sc_iot = obio->obio_iot;
     94 
     95 	if (bus_space_map(sc->sc_iot, sc->sc_addr, sc->sc_size, 0, &sc->sc_ioh))
     96 		panic("%s: Cannot map registers", device_xname(self));
     97 
     98 	geminiwdt_sc = sc;
     99 
    100 	sc->sc_armed = 1;	/* fake armed so can disarm */
    101 	geminiwdt_enable(0);	/* disable, stop, disarm */
    102 
    103 	if (sysmon_wdog_register(&sc->sc_smw) != 0) {
    104 		geminiwdt_sc = NULL;
    105 		aprint_error("%s: unable to register with sysmon\n",
    106 			     device_xname(sc->sc_dev));
    107 	}
    108 
    109 	aprint_normal("\n");
    110 	aprint_naive("\n");
    111 }
    112