1 /* $NetBSD: i80312_gpio.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $ */
2
3 /*
4 * Copyright (c) 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Intel i80312 Companion I/O general purpose I/O support.
40 */
41
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: i80312_gpio.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47
48 #include <sys/bus.h>
49
50 #include <arm/xscale/i80312reg.h>
51 #include <arm/xscale/i80312var.h>
52
53 /*
54 * i80312_gpio_set_direction:
55 *
56 * Set the direction of the indicated GPIO pins (1 == output).
57 */
58 void
i80312_gpio_set_direction(uint8_t which,uint8_t val)59 i80312_gpio_set_direction(uint8_t which, uint8_t val)
60 {
61 struct i80312_softc *sc = i80312_softc;
62
63 sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val;
64 bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOE,
65 ~sc->sc_gpio_dir);
66 }
67
68 /*
69 * i80312_gpio_set_val:
70 *
71 * Set the value of the indicated GPIO pins.
72 */
73 void
i80312_gpio_set_val(uint8_t which,uint8_t val)74 i80312_gpio_set_val(uint8_t which, uint8_t val)
75 {
76 struct i80312_softc *sc = i80312_softc;
77
78 sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val;
79 bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOD,
80 ~sc->sc_gpio_val);
81 }
82
83 /*
84 * i80312_gpio_get_val:
85 *
86 * Get the current state of the GPIO pins.
87 */
88 uint8_t
i80312_gpio_get_val(void)89 i80312_gpio_get_val(void)
90 {
91 struct i80312_softc *sc = i80312_softc;
92
93 return (bus_space_read_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GID));
94 }
95