1 /* $NetBSD: nslu2_buttons.c,v 1.4 2012/10/14 14:20:58 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: nslu2_buttons.c,v 1.4 2012/10/14 14:20:58 msaitoh Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 39 #include <dev/sysmon/sysmonvar.h> 40 #include <dev/sysmon/sysmon_taskq.h> 41 42 #include <arm/xscale/ixp425reg.h> 43 #include <arm/xscale/ixp425var.h> 44 45 #include <evbarm/nslu2/nslu2reg.h> 46 47 struct slugbutt_softc { 48 device_t sc_dev; 49 struct sysmon_pswitch sc_smpwr; 50 struct sysmon_pswitch sc_smrst; 51 }; 52 53 static int slugbutt_attached; 54 55 #define SLUGBUTT_PWR_BIT (1u << GPIO_BUTTON_PWR) 56 #define SLUGBUTT_RST_BIT (1u << GPIO_BUTTON_RST) 57 58 static void 59 power_event(void *arg) 60 { 61 struct slugbutt_softc *sc = arg; 62 63 sysmon_pswitch_event(&sc->sc_smpwr, PSWITCH_EVENT_PRESSED); 64 } 65 66 static int 67 power_intr(void *arg) 68 { 69 struct slugbutt_softc *sc = arg; 70 int rv; 71 72 GPIO_CONF_WRITE_4(ixp425_softc, IXP425_GPIO_GPISR, SLUGBUTT_PWR_BIT); 73 74 rv = sysmon_task_queue_sched(0, power_event, sc); 75 if (rv) { 76 printf("%s: WARNING: unable to queue power button " 77 "callback: %d\n", device_xname(sc->sc_dev), rv); 78 } 79 80 return (1); 81 } 82 83 static void 84 reset_event(void *arg) 85 { 86 struct slugbutt_softc *sc = arg; 87 88 sysmon_pswitch_event(&sc->sc_smrst, PSWITCH_EVENT_PRESSED); 89 } 90 91 static int 92 reset_intr(void *arg) 93 { 94 struct slugbutt_softc *sc = arg; 95 int rv; 96 97 GPIO_CONF_WRITE_4(ixp425_softc, IXP425_GPIO_GPISR, SLUGBUTT_RST_BIT); 98 99 rv = sysmon_task_queue_sched(0, reset_event, sc); 100 if (rv) { 101 printf("%s: WARNING: unable to queue reset button " 102 "callback: %d\n", device_xname(sc->sc_dev), rv); 103 } 104 105 return (1); 106 } 107 108 static void 109 slugbutt_deferred(device_t self) 110 { 111 struct slugbutt_softc *sc = device_private(self); 112 struct ixp425_softc *ixsc = ixp425_softc; 113 uint32_t reg; 114 115 sc->sc_dev = self; 116 117 /* Configure the GPIO pins as inputs */ 118 reg = GPIO_CONF_READ_4(ixsc, IXP425_GPIO_GPOER); 119 reg |= SLUGBUTT_PWR_BIT | SLUGBUTT_RST_BIT; 120 GPIO_CONF_WRITE_4(ixsc, IXP425_GPIO_GPOER, reg); 121 122 /* Configure the input type: Falling edge */ 123 reg = GPIO_CONF_READ_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_PWR)); 124 reg &= ~GPIO_TYPE(GPIO_BUTTON_PWR, GPIO_TYPE_MASK); 125 reg |= GPIO_TYPE(GPIO_BUTTON_PWR, GPIO_TYPE_EDG_FALLING); 126 GPIO_CONF_WRITE_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_PWR), reg); 127 128 reg = GPIO_CONF_READ_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_RST)); 129 reg &= ~GPIO_TYPE(GPIO_BUTTON_RST, GPIO_TYPE_MASK); 130 reg |= GPIO_TYPE(GPIO_BUTTON_RST, GPIO_TYPE_EDG_FALLING); 131 GPIO_CONF_WRITE_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_RST), reg); 132 133 /* Clear any existing interrupt */ 134 GPIO_CONF_WRITE_4(ixsc, IXP425_GPIO_GPISR, SLUGBUTT_PWR_BIT | 135 SLUGBUTT_RST_BIT); 136 137 sysmon_task_queue_init(); 138 139 sc->sc_smpwr.smpsw_name = device_xname(sc->sc_dev); 140 sc->sc_smpwr.smpsw_type = PSWITCH_TYPE_POWER; 141 142 if (sysmon_pswitch_register(&sc->sc_smpwr) != 0) { 143 printf("%s: unable to register power button with sysmon\n", 144 device_xname(sc->sc_dev)); 145 return; 146 } 147 148 sc->sc_smrst.smpsw_name = device_xname(sc->sc_dev); 149 sc->sc_smrst.smpsw_type = PSWITCH_TYPE_RESET; 150 151 if (sysmon_pswitch_register(&sc->sc_smrst) != 0) { 152 printf("%s: unable to register reset button with sysmon\n", 153 device_xname(sc->sc_dev)); 154 return; 155 } 156 157 /* Hook the interrupts */ 158 ixp425_intr_establish(BUTTON_PWR_INT, IPL_TTY, power_intr, sc); 159 ixp425_intr_establish(BUTTON_RST_INT, IPL_TTY, reset_intr, sc); 160 } 161 162 163 static int 164 slugbutt_match(device_t parent, cfdata_t cf, void *aux) 165 { 166 167 return (slugbutt_attached == 0); 168 } 169 170 static void 171 slugbutt_attach(device_t parent, device_t self, void *aux) 172 { 173 174 slugbutt_attached = 1; 175 176 aprint_normal(": Power and Reset buttons\n"); 177 178 /* Defer, to ensure ixp425_softc has been initialised */ 179 config_interrupts(self, slugbutt_deferred); 180 } 181 182 CFATTACH_DECL_NEW(slugbutt, sizeof(struct slugbutt_softc), 183 slugbutt_match, slugbutt_attach, NULL, NULL); 184
Indexes created Sun Oct 25 00:26:45 UTC 2026