1 /* $NetBSD: obsled.c,v 1.12 2024/09/07 06:17:38 andvar 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 1.12 2024/09/07 06:17:38 andvar 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 device_t 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(device_t, device_t, void *); 55 static int obsled_match(device_t, cfdata_t, void *); 56 static int obsled_sysctl_verify(SYSCTLFN_PROTO); 57 static void obsled_set_state(struct obsled_softc *); 58 59 CFATTACH_DECL_NEW(obsled, sizeof(struct obsled_softc), 60 obsled_match, obsled_attach, NULL, NULL); 61 62 static int 63 obsled_match(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux) 80 { 81 struct obsled_softc *sc = device_private(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 << device_unit(sc->sc_dev)); */ 87 88 snprintf(led_name, sizeof(led_name), 89 "led%d", (1 << device_unit(sc->sc_dev)) & 0x7); 90 aprint_naive(": OpenBlockS %s\n", led_name); 91 aprint_normal(": OpenBlockS %s\n", led_name); 92 93 sc->sc_dev = self; 94 sc->sc_tag = ga->ga_tag; 95 sc->sc_addr = ga->ga_addr; 96 sc->sc_led_state = 0; 97 98 obs266_led_set(OBS266_LED_OFF); 99 100 /* add sysctl interface */ 101 err = sysctl_createv(NULL, 0, 102 NULL, (const struct sysctlnode **)&node, 103 0, CTLTYPE_NODE, 104 "obsled", 105 NULL, 106 NULL, 0, NULL, 0, 107 CTL_HW, CTL_CREATE, CTL_EOL); 108 if (err != 0) 109 return; 110 node_mib = node->sysctl_num; 111 err = sysctl_createv(NULL, 0, 112 NULL, (const struct sysctlnode **)&node, 113 CTLFLAG_READWRITE, CTLTYPE_INT, 114 led_name, 115 SYSCTL_DESCR("OpenBlockS LED state (0=off, 1=on)"), 116 obsled_sysctl_verify, 0, (void *)sc, 0, 117 CTL_HW, node_mib, CTL_CREATE, CTL_EOL); 118 if (err != 0) 119 return; 120 121 sc->sc_led_state_mib = node->sysctl_num; 122 #if 0 123 { 124 gpio_tag_t tag = sc->sc_tag; 125 (*(tag)->io_or_write)((tag)->cookie, sc->sc_addr, 0); 126 } 127 #endif 128 } 129 130 static int 131 obsled_sysctl_verify(SYSCTLFN_ARGS) 132 { 133 struct obsled_softc *sc = rnode->sysctl_data; 134 struct sysctlnode node; 135 int err, state; 136 137 node = *rnode; 138 state = sc->sc_led_state; 139 node.sysctl_data = &state; 140 141 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 142 if (err != 0 || newp == NULL) 143 return err; 144 145 if (node.sysctl_num == sc->sc_led_state_mib) { 146 if (state < 0 || state > 1) 147 return EINVAL; 148 sc->sc_led_state = state; 149 obsled_set_state(sc); 150 } 151 152 return 0; 153 } 154 155 static void 156 obsled_set_state(struct obsled_softc *sc) 157 { 158 gpio_tag_t tag = sc->sc_tag; 159 160 (*(tag)->io_or_write)((tag)->cookie, 161 sc->sc_addr, 162 (~(sc->sc_led_state) & 1)); 163 /* GPIO LED input ON=0/OFF=1 */ 164 } 165 166 /* 167 * Setting LED interface for inside kernel. 168 * Argument `led' is 3-bit LED state (led=0-7/ON=1/OFF=0). 169 */ 170 void 171 obs266_led_set(int led) 172 { 173 device_t dv; 174 deviter_t di; 175 176 /* 177 * Searching "obsled" devices from device tree. 178 * Do you have a better idea? 179 */ 180 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); dv != NULL; 181 dv = deviter_next(&di)) { 182 if (device_is_a(dv, "obsles")) { 183 struct obsled_softc *sc = device_private(dv); 184 sc->sc_led_state = 185 (led & (1 << device_unit(dv))) >> device_unit(dv); 186 obsled_set_state(sc); 187 } 188 } 189 deviter_release(&di); 190 } 191
Indexes created Tue Sep 30 20:09:53 GMT 2025