1 /* $NetBSD: nslu2_buttons.c,v 1.2 2006/03/01 21:02:50 scw 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: nslu2_buttons.c,v 1.2 2006/03/01 21:02:50 scw Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 46 #include <dev/sysmon/sysmonvar.h> 47 #include <dev/sysmon/sysmon_taskq.h> 48 49 #include <arm/xscale/ixp425reg.h> 50 #include <arm/xscale/ixp425var.h> 51 52 #include <evbarm/nslu2/nslu2reg.h> 53 54 struct slugbutt_softc { 55 struct device sc_dev; 56 struct sysmon_pswitch sc_smpwr; 57 struct sysmon_pswitch sc_smrst; 58 }; 59 60 static int slugbutt_attached; 61 62 #define SLUGBUTT_PWR_BIT (1u << GPIO_BUTTON_PWR) 63 #define SLUGBUTT_RST_BIT (1u << GPIO_BUTTON_RST) 64 65 static void 66 power_event(void *arg) 67 { 68 struct slugbutt_softc *sc = arg; 69 70 sysmon_pswitch_event(&sc->sc_smpwr, PSWITCH_EVENT_PRESSED); 71 } 72 73 static int 74 power_intr(void *arg) 75 { 76 struct slugbutt_softc *sc = arg; 77 int rv; 78 79 GPIO_CONF_WRITE_4(ixp425_softc, IXP425_GPIO_GPISR, SLUGBUTT_PWR_BIT); 80 81 rv = sysmon_task_queue_sched(0, power_event, sc); 82 if (rv) { 83 printf("%s: WARNING: unable to queue power button " 84 "callback: %d\n", sc->sc_dev.dv_xname, rv); 85 } 86 87 return (1); 88 } 89 90 static void 91 reset_event(void *arg) 92 { 93 struct slugbutt_softc *sc = arg; 94 95 sysmon_pswitch_event(&sc->sc_smrst, PSWITCH_EVENT_PRESSED); 96 } 97 98 static int 99 reset_intr(void *arg) 100 { 101 struct slugbutt_softc *sc = arg; 102 int rv; 103 104 GPIO_CONF_WRITE_4(ixp425_softc, IXP425_GPIO_GPISR, SLUGBUTT_RST_BIT); 105 106 rv = sysmon_task_queue_sched(0, reset_event, sc); 107 if (rv) { 108 printf("%s: WARNING: unable to queue reset button " 109 "callback: %d\n", sc->sc_dev.dv_xname, rv); 110 } 111 112 return (1); 113 } 114 115 static void 116 slugbutt_deferred(struct device *self) 117 { 118 struct slugbutt_softc *sc = (struct slugbutt_softc *) self; 119 struct ixp425_softc *ixsc = ixp425_softc; 120 uint32_t reg; 121 122 /* Configure the GPIO pins as inputs */ 123 reg = GPIO_CONF_READ_4(ixsc, IXP425_GPIO_GPOER); 124 reg |= SLUGBUTT_PWR_BIT | SLUGBUTT_RST_BIT; 125 GPIO_CONF_WRITE_4(ixsc, IXP425_GPIO_GPOER, reg); 126 127 /* Configure the input type: Falling edge */ 128 reg = GPIO_CONF_READ_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_PWR)); 129 reg &= ~GPIO_TYPE(GPIO_BUTTON_PWR, GPIO_TYPE_MASK); 130 reg |= GPIO_TYPE(GPIO_BUTTON_PWR, GPIO_TYPE_EDG_FALLING); 131 GPIO_CONF_WRITE_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_PWR), reg); 132 133 reg = GPIO_CONF_READ_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_RST)); 134 reg &= ~GPIO_TYPE(GPIO_BUTTON_RST, GPIO_TYPE_MASK); 135 reg |= GPIO_TYPE(GPIO_BUTTON_RST, GPIO_TYPE_EDG_FALLING); 136 GPIO_CONF_WRITE_4(ixsc, GPIO_TYPE_REG(GPIO_BUTTON_RST), reg); 137 138 /* Clear any existing interrupt */ 139 GPIO_CONF_WRITE_4(ixsc, IXP425_GPIO_GPISR, SLUGBUTT_PWR_BIT | 140 SLUGBUTT_RST_BIT); 141 142 sysmon_task_queue_init(); 143 144 sc->sc_smpwr.smpsw_name = sc->sc_dev.dv_xname; 145 sc->sc_smpwr.smpsw_type = PSWITCH_TYPE_POWER; 146 147 if (sysmon_pswitch_register(&sc->sc_smpwr) != 0) { 148 printf("%s: unable to register power button with sysmon\n", 149 sc->sc_dev.dv_xname); 150 return; 151 } 152 153 sc->sc_smrst.smpsw_name = sc->sc_dev.dv_xname; 154 sc->sc_smrst.smpsw_type = PSWITCH_TYPE_RESET; 155 156 if (sysmon_pswitch_register(&sc->sc_smrst) != 0) { 157 printf("%s: unable to register reset button with sysmon\n", 158 sc->sc_dev.dv_xname); 159 return; 160 } 161 162 /* Hook the interrupts */ 163 ixp425_intr_establish(BUTTON_PWR_INT, IPL_TTY, power_intr, sc); 164 ixp425_intr_establish(BUTTON_RST_INT, IPL_TTY, reset_intr, sc); 165 } 166 167 168 static int 169 slugbutt_match(struct device *parent, struct cfdata *cf, void *arg) 170 { 171 172 return (slugbutt_attached == 0); 173 } 174 175 static void 176 slugbutt_attach(struct device *parent, struct device *self, void *arg) 177 { 178 179 slugbutt_attached = 1; 180 181 aprint_normal(": Power and Reset buttons\n"); 182 183 /* Defer, to ensure ixp425_softc has been initialised */ 184 config_interrupts(self, slugbutt_deferred); 185 } 186 187 CFATTACH_DECL(slugbutt, sizeof(struct slugbutt_softc), 188 slugbutt_match, slugbutt_attach, NULL, NULL); 189