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      1 /*	$NetBSD: pwrsw_obio.c,v 1.4 2023/12/20 15:00:08 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 2005 NONAKA Kimihiro <nonaka (at) netbsd.org>
      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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "btn_obio.h"
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: pwrsw_obio.c,v 1.4 2023/12/20 15:00:08 thorpej Exp $");
     32 
     33 #include <sys/types.h>
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/device.h>
     37 #include <sys/conf.h>
     38 #include <sys/ioctl.h>
     39 
     40 #include <dev/sysmon/sysmonvar.h>
     41 #include <dev/sysmon/sysmon_taskq.h>
     42 
     43 #include <sh3/devreg.h>
     44 
     45 #include <landisk/landisk/landiskreg.h>
     46 #include <landisk/dev/obiovar.h>
     47 
     48 struct pwrsw_obio_softc {
     49 	device_t		sc_dev;
     50 	void			*sc_ih;
     51 
     52 	struct sysmon_pswitch	sc_smpsw; /* our sysmon glue */
     53 
     54 	int			sc_flags;
     55 #define	SYSMON_ATTACHED	1
     56 };
     57 
     58 static int pwrsw_obio_probe(device_t, cfdata_t, void *);
     59 static void pwrsw_obio_attach(device_t, device_t, void *);
     60 
     61 static int pwrsw_intr(void *aux);
     62 static void pwrsw_pressed_event(void *arg);
     63 
     64 CFATTACH_DECL_NEW(pwrsw_obio, sizeof(struct pwrsw_obio_softc),
     65     pwrsw_obio_probe, pwrsw_obio_attach, NULL, NULL);
     66 
     67 static struct pwrsw_obio_softc *pwrsw_softc;
     68 
     69 static int
     70 pwrsw_obio_probe(device_t parent, cfdata_t cfp, void *aux)
     71 {
     72 	struct obio_attach_args *oa = aux;
     73 
     74 	if (pwrsw_softc)
     75 		return (0);
     76 
     77 	oa->oa_nio = 0;
     78 	oa->oa_niomem = 0;
     79 	oa->oa_nirq = 1;
     80 	oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW;
     81 
     82 	return (1);
     83 }
     84 
     85 static void
     86 pwrsw_obio_attach(device_t parent, device_t self, void *aux)
     87 {
     88 	struct pwrsw_obio_softc *sc;
     89 
     90 	aprint_naive("\n");
     91 	aprint_normal(": Power Switch\n");
     92 
     93 	sc = device_private(self);
     94 	sc->sc_dev = self;
     95 
     96 	pwrsw_softc = sc;
     97 
     98 	sc->sc_smpsw.smpsw_name = device_xname(self);
     99 	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;
    100 
    101 	sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY,
    102 	    pwrsw_intr, sc);
    103 	if (sc->sc_ih == NULL) {
    104 		aprint_error_dev(self, "unable to establish interrupt");
    105 		panic("extintr_establish");
    106 	}
    107 
    108 	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
    109 		aprint_error_dev(self, "unable to register with sysmon\n");
    110 		return;
    111 	}
    112 	sc->sc_flags |= SYSMON_ATTACHED;
    113 }
    114 
    115 static int
    116 pwrsw_intr(void *arg)
    117 {
    118 	struct pwrsw_obio_softc *sc = arg;
    119 	int status;
    120 
    121 	status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
    122 	if (status == -1) {
    123 		return (0);
    124 	}
    125 
    126 	status = ~status;
    127 	if (status & BTN_POWER_BIT) {
    128 		if (sc->sc_flags & SYSMON_ATTACHED) {
    129 			sysmon_task_queue_sched(0, pwrsw_pressed_event, sc);
    130 			extintr_disable(sc->sc_ih);
    131 #if NBTN_OBIO > 0
    132 			extintr_disable_by_num(LANDISK_INTR_BTN);
    133 #endif
    134 		} else {
    135 			aprint_normal_dev(sc->sc_dev, "pressed\n");
    136 		}
    137 		_reg_write_1(LANDISK_PWRSW_INTCLR, 1);
    138 		return (1);
    139 	}
    140 	return (0);
    141 }
    142 
    143 static void
    144 pwrsw_pressed_event(void *arg)
    145 {
    146 	struct pwrsw_obio_softc *sc = arg;
    147 
    148 	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
    149 }
    150