sys/arch/arm/xscale/i80321_gpio.c

   1 /*      $NetBSD: i80321_gpio.c,v 1.1.4.3 2004/09/21 13:13:42 skrll Exp $        */
   2
   3 /*
   4  * Copyright (c) 2001, 2003 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 i80321 I/O Processor general purpose I/O support.
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44
  45 #include <machine/bus.h>
  46
  47 #include <arm/xscale/i80321reg.h>
  48 #include <arm/xscale/i80321var.h>
  49
  50 /*
  51  * i80321_gpio_set_direction:
  52  *
  53  *      Set the direction of the indicated GPIO pins (1 == output).
  54  */
  55 void
  56 i80321_gpio_set_direction(uint8_t which, uint8_t val)
  57 {
  58         struct i80321_softc *sc = i80321_softc;
  59
  60         sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val;
  61         bus_space_write_1(sc->sc_st, sc->sc_sh, ICU_GPOE, ~sc->sc_gpio_dir);
  62 }
  63
  64 /*
  65  * i80321_gpio_set_val:
  66  *
  67  *      Set the value of the indicated GPIO pins.
  68  */
  69 void
  70 i80321_gpio_set_val(uint8_t which, uint8_t val)
  71 {
  72         struct i80321_softc *sc = i80321_softc;
  73
  74         sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val;
  75         bus_space_write_1(sc->sc_st, sc->sc_sh, ICU_GPOD, sc->sc_gpio_val);
  76 }
  77
  78 /*
  79  * i80321_gpio_get_val:
  80  *
  81  *      Get the current state of the GPIO pins.
  82  */
  83 uint8_t
  84 i80321_gpio_get_val(void)
  85 {
  86         struct i80321_softc *sc = i80321_softc;
  87
  88         return (bus_space_read_1(sc->sc_st, sc->sc_sh, ICU_GPID));
  89 }