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/cdefs.h>
37 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/systm.h>
41 #include <sys/limits.h>
42 #include <sys/malloc.h>
43 #include <sys/ctype.h>
45 #include <sys/queue.h>
46 #include <dev/misc/gpio/gpio.h>
49 #include <sys/devfs.h>
52 LIST_ENTRY(ledsc) list;
59 struct gpio_mapping *gp_map;
62 DEVFS_DECLARE_CLONE_BITMAP(nled);
63 static struct lock led_lock;
64 static LIST_HEAD(, ledsc) led_list = LIST_HEAD_INITIALIZER(&led_list);
65 static MALLOC_DEFINE(M_LED, "LED", "LED driver");
69 led_open(struct dev_open_args *ap)
74 dev = ap->a_head.a_dev;
86 led_close(struct dev_close_args *ap)
91 dev = ap->a_head.a_dev;
101 led_write(struct dev_write_args *ap)
109 dev = ap->a_head.a_dev;
112 if (ap->a_uio->uio_resid > sizeof(int))
115 len = ap->a_uio->uio_resid;
117 error = uiomove((void *)&data, ap->a_uio->uio_resid, ap->a_uio);
122 data = ((char *)&data)[0];
127 gpio_pin_write(sc->gp, sc->gp_map, 0, data);
133 led_read(struct dev_read_args *ap)
140 dev = ap->a_head.a_dev;
143 if (ap->a_uio->uio_resid < sizeof(int))
146 data = gpio_pin_read(sc->gp, sc->gp_map, 0);
148 error = uiomove((void *)&data,
149 (ap->a_uio->uio_resid > sizeof(int))?(sizeof(int)):(ap->a_uio->uio_resid),
156 led_ioctl(struct dev_ioctl_args *ap)
158 /* XXX: set a name */
162 static struct dev_ops nled_ops = {
165 .d_close = led_close,
166 .d_write = led_write,
168 .d_ioctl = led_ioctl,
173 led_attach(struct gpio *gp, void *arg, int pin, u_int32_t mask)
180 lockmgr(&led_lock, LK_EXCLUSIVE);
181 sc = kmalloc(sizeof(struct ledsc), M_LED, M_WAITOK);
183 /* XXX: check for name collisions */
184 sc->name = kstrdup((char *)arg, M_LED);
188 sc->gp_map = gpio_map(gp, NULL, pin, 1);
189 if (sc->gp_map == NULL) {
193 sc->unit = devfs_clone_bitmap_get(&DEVFS_CLONE_BITMAP(nled), 0);
195 LIST_INSERT_HEAD(&led_list, sc, list);
196 sc->dev = make_dev(&nled_ops, sc->unit,
197 UID_ROOT, GID_WHEEL, 0600, "led/%s", sc->name);
198 sc->dev->si_drv1 = sc;
199 lockmgr(&led_lock, LK_RELEASE);
201 kprintf("gpio_led: Attached led '%s' to gpio %s, pin %d\n",
202 sc->name, sc->gp->driver_name, pin);
208 led_detach(struct gpio *gp, void *arg, int pin)
214 led_switch(const char *name, int on_off)
221 lockmgr(&led_lock, LK_EXCLUSIVE);
222 LIST_FOREACH(sc, &led_list, list) {
223 if (strcmp(name, sc->name) != 0)
226 gpio_pin_write(sc->gp, sc->gp_map, 0, on_off);
230 lockmgr(&led_lock, LK_RELEASE);
233 struct gpio_consumer led_gpio_cons = {
234 .consumer_name = "led",
235 .consumer_attach = led_attach,
236 .consumer_detach = led_detach,
240 led_drvinit(void *unused)
242 lockinit(&led_lock, "led_lock", 0, 0);
243 devfs_clone_bitmap_init(&DEVFS_CLONE_BITMAP(nled));
244 gpio_consumer_register(&led_gpio_cons);
247 SYSINIT(leddev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, led_drvinit, NULL);