sys/arch/amiga/dev/drbbc.c

   1 /*      $NetBSD: drbbc.c,v 1.17 2008/04/28 20:23:12 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Ignatios Souvatzis.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: drbbc.c,v 1.17 2008/04/28 20:23:12 martin Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/device.h>
  38 #include <sys/systm.h>
  39
  40 #include <uvm/uvm_extern.h>
  41
  42 #if 0
  43 #include <machine/psl.h>
  44 #endif
  45 #include <machine/cpu.h>
  46 #include <amiga/amiga/device.h>
  47 #include <amiga/amiga/custom.h>
  48 #include <amiga/amiga/cia.h>
  49 #include <amiga/amiga/drcustom.h>
  50 #include <amiga/dev/rtc.h>
  51
  52 #include <dev/clock_subr.h>
  53 #include <dev/ic/ds.h>
  54
  55 int draco_ds_read_bit(void *);
  56 void draco_ds_write_bit(void *, int);
  57 void draco_ds_reset(void *);
  58
  59 void drbbc_attach(struct device *, struct device *, void *);
  60 int drbbc_match(struct device *, struct cfdata *, void *);
  61
  62 int dracougettod(todr_chip_handle_t, struct timeval *);
  63 int dracousettod(todr_chip_handle_t, struct timeval *);
  64
  65 static struct todr_chip_handle dracotodr;
  66 struct drbbc_softc {
  67         struct device sc_dev;
  68         struct ds_handle sc_dsh;
  69 };
  70
  71 CFATTACH_DECL(drbbc, sizeof(struct drbbc_softc),
  72     drbbc_match, drbbc_attach, NULL, NULL);
  73
  74 struct drbbc_softc *drbbc_sc;
  75
  76 int
  77 drbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp)
  78 {
  79         static int drbbc_matched = 0;
  80
  81         /* Allow only one instance. */
  82         if (!is_draco() || !matchname(auxp, "drbbc") || drbbc_matched)
  83                 return (0);
  84
  85         drbbc_matched = 1;
  86         return (1);
  87 }
  88
  89 void
  90 drbbc_attach(struct device *pdp, struct device *dp, void *auxp)
  91 {
  92         int i;
  93         struct drbbc_softc *sc;
  94         u_int8_t rombuf[8];
  95
  96         sc = (struct drbbc_softc *)dp;
  97
  98         sc->sc_dsh.ds_read_bit = draco_ds_read_bit;
  99         sc->sc_dsh.ds_write_bit = draco_ds_write_bit;
 100         sc->sc_dsh.ds_reset = draco_ds_reset;
 101         sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE);
 102
 103         sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle);
 104
 105         ds_write_byte(&sc->sc_dsh, DS_ROM_READ);
 106         for (i=0; i<8; ++i)
 107                 rombuf[i] = ds_read_byte(&sc->sc_dsh);
 108
 109         hostid = (rombuf[3] << 24) + (rombuf[2] << 16) +
 110                 (rombuf[1] << 8) + rombuf[7];
 111
 112         printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n",
 113                 rombuf[7], rombuf[6], rombuf[5], rombuf[4],
 114                 rombuf[3], rombuf[2], rombuf[1], rombuf[0],
 115                 hostid);
 116
 117         drbbc_sc = sc;
 118         dracotodr.cookie = sc;
 119         dracotodr.todr_gettime = dracougettod;
 120         dracotodr.todr_settime = dracousettod;
 121         todr_attach(&dracotodr);
 122 }
 123
 124 int
 125 draco_ds_read_bit(void *p)
 126 {
 127         struct drioct *draco_ioctl;
 128
 129         draco_ioctl = p;
 130
 131         while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
 132
 133         draco_ioctl->io_clockw1 = 0;
 134
 135         while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
 136
 137         return (draco_ioctl->io_status & DRSTAT_CLKDAT);
 138 }
 139
 140 void
 141 draco_ds_write_bit(void *p, int b)
 142 {
 143         struct drioct *draco_ioctl;
 144
 145         draco_ioctl = p;
 146
 147         while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
 148
 149         if (b)
 150                 draco_ioctl->io_clockw1 = 0;
 151         else
 152                 draco_ioctl->io_clockw0 = 0;
 153 }
 154
 155 void
 156 draco_ds_reset(void *p)
 157 {
 158         struct drioct *draco_ioctl;
 159
 160         draco_ioctl = p;
 161
 162         draco_ioctl->io_clockrst = 0;
 163 }
 164
 165 int
 166 dracougettod(todr_chip_handle_t h, struct timeval *tvp)
 167 {
 168         u_int32_t clkbuf;
 169         u_int32_t usecs;
 170
 171         drbbc_sc->sc_dsh.ds_reset(drbbc_sc->sc_dsh.ds_hw_handle);
 172
 173         ds_write_byte(&drbbc_sc->sc_dsh, DS_ROM_SKIP);
 174
 175         ds_write_byte(&drbbc_sc->sc_dsh, DS_MEM_READ_MEMORY);
 176         /* address of seconds/256: */
 177         ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
 178         ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
 179
 180         usecs = (ds_read_byte(&drbbc_sc->sc_dsh) * 1000000) / 256;
 181         clkbuf = ds_read_byte(&drbbc_sc->sc_dsh)
 182             + (ds_read_byte(&drbbc_sc->sc_dsh)<<8)
 183             + (ds_read_byte(&drbbc_sc->sc_dsh)<<16)
 184             + (ds_read_byte(&drbbc_sc->sc_dsh)<<24);
 185
 186         /* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */
 187
 188         clkbuf += (8*365 + 2) * 86400;
 189
 190         tvp->tv_sec = clkbuf;
 191         tvp->tv_usec = usecs;
 192
 193         return (0);
 194 }
 195
 196 int
 197 dracousettod(todr_chip_handle_t h, struct timeval *tvp)
 198 {
 199         return (ENXIO);
 200 }