2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
39 #include <sys/limits.h>
40 #include <sys/malloc.h>
41 #include <sys/ctype.h>
43 #include <sys/queue.h>
44 #include <dev/misc/gpio/gpio.h>
47 #include <sys/devfs.h>
50 LIST_ENTRY(ledsc) list;
57 struct gpio_mapping *gp_map;
60 DEVFS_DECLARE_CLONE_BITMAP(nled);
61 static struct lock led_lock;
62 static LIST_HEAD(, ledsc) led_list = LIST_HEAD_INITIALIZER(&led_list);
63 static MALLOC_DEFINE(M_LED, "LED", "LED driver");
67 led_open(struct dev_open_args *ap)
72 dev = ap->a_head.a_dev;
84 led_close(struct dev_close_args *ap)
89 dev = ap->a_head.a_dev;
99 led_write(struct dev_write_args *ap)
107 dev = ap->a_head.a_dev;
110 if (ap->a_uio->uio_resid > sizeof(int))
113 len = ap->a_uio->uio_resid;
115 error = uiomove((void *)&data, ap->a_uio->uio_resid, ap->a_uio);
120 data = ((char *)&data)[0];
125 gpio_pin_write(sc->gp, sc->gp_map, 0, data);
131 led_read(struct dev_read_args *ap)
138 dev = ap->a_head.a_dev;
141 if (ap->a_uio->uio_resid < sizeof(int))
144 data = gpio_pin_read(sc->gp, sc->gp_map, 0);
146 error = uiomove((void *)&data,
147 (ap->a_uio->uio_resid > sizeof(int))?(sizeof(int)):(ap->a_uio->uio_resid),
154 led_ioctl(struct dev_ioctl_args *ap)
156 /* XXX: set a name */
160 static struct dev_ops nled_ops = {
163 .d_close = led_close,
164 .d_write = led_write,
166 .d_ioctl = led_ioctl,
171 led_attach(struct gpio *gp, void *arg, int pin, u_int32_t mask)
178 lockmgr(&led_lock, LK_EXCLUSIVE);
179 sc = kmalloc(sizeof(struct ledsc), M_LED, M_WAITOK);
181 /* XXX: check for name collisions */
182 sc->name = kstrdup((char *)arg, M_LED);
186 sc->gp_map = gpio_map(gp, NULL, pin, 1);
187 if (sc->gp_map == NULL) {
191 sc->unit = devfs_clone_bitmap_get(&DEVFS_CLONE_BITMAP(nled), 0);
193 LIST_INSERT_HEAD(&led_list, sc, list);
194 sc->dev = make_dev(&nled_ops, sc->unit,
195 UID_ROOT, GID_WHEEL, 0600, "led/%s", sc->name);
196 sc->dev->si_drv1 = sc;
197 lockmgr(&led_lock, LK_RELEASE);
199 kprintf("gpio_led: Attached led '%s' to gpio %s, pin %d\n",
200 sc->name, sc->gp->driver_name, pin);
206 led_detach(struct gpio *gp, void *arg, int pin)
213 led_switch(const char *name, int on_off)
220 lockmgr(&led_lock, LK_EXCLUSIVE);
221 LIST_FOREACH(sc, &led_list, list) {
222 if (strcmp(name, sc->name) != 0)
225 gpio_pin_write(sc->gp, sc->gp_map, 0, on_off);
229 lockmgr(&led_lock, LK_RELEASE);
232 struct gpio_consumer led_gpio_cons = {
233 .consumer_name = "led",
234 .consumer_attach = led_attach,
235 .consumer_detach = led_detach,
239 led_drvinit(void *unused)
241 lockinit(&led_lock, "led_lock", 0, 0);
242 devfs_clone_bitmap_init(&DEVFS_CLONE_BITMAP(nled));
243 gpio_consumer_register(&led_gpio_cons);
246 SYSINIT(leddev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, led_drvinit, NULL);