obsled.c revision 1.3
1 /* $NetBSD: obsled.c,v 1.3 2005/09/04 12:20:15 shige Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Shigeyuki Fukushima. 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 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials provided 15 * with the distribution. 16 * 3. The name of the author may not be used to endorse or promote 17 * products derived from this software without specific prior 18 * written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 26 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: obsled.c,v 1.3 2005/09/04 12:20:15 shige Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/device.h> 38 #include <sys/queue.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 42 #include <machine/obs266.h> 43 44 #include <powerpc/ibm4xx/dev/gpiovar.h> 45 46 struct obsled_softc { 47 struct device sc_dev; 48 gpio_tag_t sc_tag; 49 int sc_addr; 50 int sc_led_state; /* LED status (ON=1/OFF=0) */ 51 int sc_led_state_mib; 52 }; 53 54 static void obsled_attach(struct device *, struct device *, void *); 55 static int obsled_match(struct device *, struct cfdata *, void *); 56 static int obsled_sysctl_verify(SYSCTLFN_PROTO); 57 static void obsled_set_state(struct obsled_softc *); 58 59 CFATTACH_DECL(obsled, sizeof(struct obsled_softc), 60 obsled_match, obsled_attach, NULL, NULL); 61 62 static int 63 obsled_match(struct device *parent, struct cfdata *cf, void *aux) 64 { 65 struct gpio_attach_args *ga = aux; 66 67 /* XXX: support only OpenBlockS266 LED */ 68 if (ga->ga_addr == OBS266_GPIO_LED1) 69 return (1); 70 else if (ga->ga_addr == OBS266_GPIO_LED2) 71 return (1); 72 else if (ga->ga_addr == OBS266_GPIO_LED4) 73 return (1); 74 75 return (0); 76 } 77 78 static void 79 obsled_attach(struct device *parent, struct device *self, void *aux) 80 { 81 struct obsled_softc *sc = (struct obsled_softc *)self; 82 struct gpio_attach_args *ga = aux; 83 struct sysctlnode *node; 84 int err, node_mib; 85 char led_name[5]; 86 /* int led = (1 << sc->sc_dev.dv_unit); */ 87 88 snprintf(led_name, sizeof(led_name), 89 "led%d", (1 << sc->sc_dev.dv_unit) & 0x7); 90 aprint_naive(": OpenBlockS %s\n", led_name); 91 aprint_normal(": OpenBlockS %s\n", led_name); 92 93 sc->sc_tag = ga->ga_tag; 94 sc->sc_addr = ga->ga_addr; 95 sc->sc_led_state = 0; 96 97 obs266_led_set(OBS266_LED_OFF); 98 99 /* add sysctl interface */ 100 err = sysctl_createv(NULL, 0, 101 NULL, NULL, 102 0, CTLTYPE_NODE, 103 "hw", 104 NULL, 105 NULL, 0, NULL, 0, 106 CTL_HW, CTL_EOL); 107 if (err != 0) 108 return; 109 err = sysctl_createv(NULL, 0, 110 NULL, (const struct sysctlnode **)&node, 111 0, CTLTYPE_NODE, 112 "obsled", 113 NULL, 114 NULL, 0, NULL, 0, 115 CTL_HW, CTL_CREATE, CTL_EOL); 116 if (err != 0) 117 return; 118 node_mib = node->sysctl_num; 119 err = sysctl_createv(NULL, 0, 120 NULL, (const struct sysctlnode **)&node, 121 CTLFLAG_READWRITE, CTLTYPE_INT, 122 led_name, 123 SYSCTL_DESCR("OpenBlockS LED state (0=off, 1=on)"), 124 obsled_sysctl_verify, 0, sc, 0, 125 CTL_HW, node_mib, CTL_CREATE, CTL_EOL); 126 if (err != 0) 127 return; 128 129 sc->sc_led_state_mib = node->sysctl_num; 130 #if 0 131 { 132 gpio_tag_t tag = sc->sc_tag; 133 (*(tag)->io_or_write)((tag)->cookie, sc->sc_addr, 0); 134 } 135 #endif 136 } 137 138 static int 139 obsled_sysctl_verify(SYSCTLFN_ARGS) 140 { 141 struct obsled_softc *sc = rnode->sysctl_data; 142 struct sysctlnode node; 143 int err, state; 144 145 node = *rnode; 146 state = sc->sc_led_state; 147 node.sysctl_data = &state; 148 149 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 150 if (err != 0 || newp == NULL) 151 return err; 152 153 if (node.sysctl_num == sc->sc_led_state_mib) { 154 if (state < 0 || state > 1) 155 return EINVAL; 156 sc->sc_led_state = state; 157 obsled_set_state(sc); 158 } 159 160 return 0; 161 } 162 163 static void 164 obsled_set_state(struct obsled_softc *sc) 165 { 166 gpio_tag_t tag = sc->sc_tag; 167 168 (*(tag)->io_or_write)((tag)->cookie, 169 sc->sc_addr, 170 (~(sc->sc_led_state) & 1)); 171 /* GPIO LED input ON=0/OFF=1 */ 172 } 173 174 /* 175 * Setting LED interface for inside kernel. 176 * Argumnt `led' is 3-bit LED state (led=0-7/ON=1/OFF=0). 177 */ 178 void 179 obs266_led_set(int led) 180 { 181 struct device *dp = NULL; 182 struct devicelist *dlp = &alldevs; 183 184 /* 185 * Sarching "obsled" devices from device tree. 186 * Do you have something better idea? 187 */ 188 for (dp = TAILQ_FIRST(dlp); dp != NULL; dp = TAILQ_NEXT(dp, dv_list)) { 189 if (dp->dv_cfdata != NULL 190 && strcmp(dp->dv_cfdata->cf_name, "obsled") == 0) { 191 struct obsled_softc *sc = (struct obsled_softc *)dp; 192 sc->sc_led_state = 193 (led & (1 << dp->dv_unit)) >> dp->dv_unit; 194 obsled_set_state(sc); 195 } 196 } 197 } 198
Indexes created Tue Sep 30 20:09:53 GMT 2025