sys/arch/evbarm/mpcsa/mpcsa_cf.c

   1 /*      $Id: mpcsa_cf.c,v 1.2 2008/07/03 01:15:39 matt Exp $    */
   2 /*      $NetBSD$        */
   3
   4 /*
   5  * Copyright (c) 2007 Embedtronics Oy. 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 copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/device.h>
  36 #include <arm/at91/at91reg.h>
  37 #include <arm/at91/at91var.h>
  38 #include <arm/at91/at91cfvar.h>
  39 #include <arm/at91/at91piovar.h>
  40
  41 #ifdef MPCA_CF_DEBUG
  42 int mpcsa_cf_debug = MPCA_CF_DEBUG;
  43 #define DPRINTFN(n,x)   if (mpcsa_cf_debug>(n)) printf x;
  44 #else
  45 #define DPRINTFN(n,x)
  46 #endif
  47
  48 struct at91_gpio_softc;
  49
  50 struct mpcsa_cf_softc {
  51         struct at91cf_softc     sc_dev;
  52         struct at91pio_softc    *sc_pioc;
  53 };
  54
  55 static int mpcsa_cf_match(struct device *, struct cfdata *, void *);
  56 static void mpcsa_cf_attach(struct device *, struct device *, void *);
  57
  58 CFATTACH_DECL_NEW(mpcsa_cf, sizeof(struct mpcsa_cf_softc),
  59               mpcsa_cf_match, mpcsa_cf_attach, NULL, NULL);
  60
  61 static int      mpcsa_cf_power_ctl(void *self, int onoff);
  62 static int      mpcsa_cf_card_detect(void *self);
  63 static int      mpcsa_cf_irq_line(void *self);
  64 static void *   mpcsa_cf_intr_establish(void *self, int which, int ipl, int (*ih_func)(void *), void *arg);
  65 static void     mpcsa_cf_intr_disestablish(void *self, int which, void *cookie);
  66
  67 struct at91cf_chipset_tag mpcsa_cf_tag = {
  68         mpcsa_cf_power_ctl,
  69         mpcsa_cf_card_detect,
  70         mpcsa_cf_irq_line,
  71         mpcsa_cf_intr_establish,
  72         mpcsa_cf_intr_disestablish
  73 };
  74
  75 static int
  76 mpcsa_cf_match(struct device *parent, struct cfdata *match, void *aux)
  77 {
  78         if (strcmp(match->cf_name, "at91cf") == 0 && strcmp(match->cf_atname, "mpcsa_cf") == 0)
  79                 return 2;
  80         return 0;
  81 }
  82
  83 static void
  84 mpcsa_cf_attach(struct device *parent, struct device *self, void *aux)
  85 {
  86         struct mpcsa_cf_softc *sc = device_private(self);
  87 //      at91cf_chipset_tag_t cscf = sc->sc_dev.sc_cscf;
  88         struct at91pio_softc *pioc;
  89
  90         if ((pioc = at91pio_sc(AT91_PIOC)) == NULL) {
  91                 printf("no PIOC!\n");
  92                 return;
  93         }
  94
  95         // configure PIO!
  96         sc->sc_pioc = pioc;
  97         at91pio_in(sc->sc_pioc, 3);     // CFIRQ
  98         at91pio_in(sc->sc_pioc, 4);     // CFCD
  99         at91pio_out(sc->sc_pioc, 5);    // CFRESET
 100
 101         // and call common routine
 102         at91cf_attach_common(parent, self, aux, &mpcsa_cf_tag);
 103 }
 104
 105 static int
 106 mpcsa_cf_power_ctl(void *self, int onoff)
 107 {
 108         struct mpcsa_cf_softc *sc = self;
 109         if (onoff) {
 110                 at91pio_set(sc->sc_pioc, 5);
 111                 return 20000;
 112         } else {
 113                 at91pio_clear(sc->sc_pioc, 5);
 114                 return 20000;
 115         }
 116 }
 117
 118 static int      mpcsa_cf_card_detect(void *self)
 119 {
 120         struct mpcsa_cf_softc *sc = self;
 121         return at91pio_read(sc->sc_pioc, 4) == 0;
 122 }
 123
 124 static int      mpcsa_cf_irq_line(void *self)
 125 {
 126         struct mpcsa_cf_softc *sc = self;
 127         return at91pio_read(sc->sc_pioc, 3);
 128 }
 129
 130 static void *   mpcsa_cf_intr_establish(void *self, int which, int ipl, int (*ih_func)(void *), void *ih_arg)
 131 {
 132         struct mpcsa_cf_softc *sc = self;
 133         return at91pio_intr_establish(sc->sc_pioc, which == CD_IRQ ? 4 : 3,
 134                                         ipl, ih_func, ih_arg);
 135 }
 136
 137 static void     mpcsa_cf_intr_disestablish(void *self, int which, void *cookie)
 138 {
 139         struct mpcsa_cf_softc *sc = self;
 140         at91pio_intr_disestablish(sc->sc_pioc, which == CD_IRQ ? 4 : 3, cookie);
 141 }
 142