sys/arch/sparc64/dev/auxio.c

   1 /*      $NetBSD: auxio.c,v 1.19 2008/05/29 14:51:26 mrg Exp $   */
   2
   3 /*
   4  * Copyright (c) 2000, 2001 Matthew R. Green
   5  * 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 ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  * 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 /*
  30  * AUXIO registers support on the sbus & ebus2, used for the floppy driver
  31  * and to control the system LED, for the BLINK option.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: auxio.c,v 1.19 2008/05/29 14:51:26 mrg Exp $");
  36
  37 #include "opt_auxio.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/callout.h>
  43 #include <sys/errno.h>
  44 #include <sys/device.h>
  45 #include <sys/malloc.h>
  46
  47 #include <machine/autoconf.h>
  48 #include <machine/cpu.h>
  49
  50 #include <dev/ebus/ebusreg.h>
  51 #include <dev/ebus/ebusvar.h>
  52 #include <sparc64/dev/sbusvar.h>
  53 #include <sparc64/dev/auxioreg.h>
  54 #include <sparc64/dev/auxiovar.h>
  55
  56 /*
  57  * on sun4u, auxio exists with one register (LED) on the sbus, and 5
  58  * registers on the ebus2 (pci) (LED, PCIMODE, FREQUENCY, SCSI
  59  * OSCILLATOR, and TEMP SENSE.
  60  */
  61
  62 struct auxio_softc {
  63         struct device           sc_dev;
  64
  65         /* parent's tag */
  66         bus_space_tag_t         sc_tag;
  67
  68         /* handles to the various auxio regsiter sets */
  69         bus_space_handle_t      sc_led;
  70         bus_space_handle_t      sc_pci;
  71         bus_space_handle_t      sc_freq;
  72         bus_space_handle_t      sc_scsi;
  73         bus_space_handle_t      sc_temp;
  74
  75         int                     sc_flags;
  76 #define AUXIO_LEDONLY           0x1
  77 #define AUXIO_EBUS              0x2
  78 #define AUXIO_SBUS              0x4
  79 };
  80
  81 #define AUXIO_ROM_NAME          "auxio"
  82
  83 void    auxio_attach_common(struct auxio_softc *);
  84 int     auxio_ebus_match(struct device *, struct cfdata *, void *);
  85 void    auxio_ebus_attach(struct device *, struct device *, void *);
  86 int     auxio_sbus_match(struct device *, struct cfdata *, void *);
  87 void    auxio_sbus_attach(struct device *, struct device *, void *);
  88
  89 CFATTACH_DECL(auxio_ebus, sizeof(struct auxio_softc),
  90     auxio_ebus_match, auxio_ebus_attach, NULL, NULL);
  91
  92 CFATTACH_DECL(auxio_sbus, sizeof(struct auxio_softc),
  93     auxio_sbus_match, auxio_sbus_attach, NULL, NULL);
  94
  95 extern struct cfdriver auxio_cd;
  96
  97 #ifdef BLINK
  98 static callout_t blink_ch;
  99 static void auxio_blink(void *);
 100
 101 /* let someone disable it if it's already turned on; XXX sysctl? */
 102 int do_blink = 1;
 103
 104 static void
 105 auxio_blink(void *x)
 106 {
 107         struct auxio_softc *sc = x;
 108         int s;
 109         uint32_t led;
 110
 111         if (do_blink == 0)
 112                 return;
 113
 114         s = splhigh();
 115         if (sc->sc_flags & AUXIO_EBUS)
 116                 led = le32toh(bus_space_read_4(sc->sc_tag, sc->sc_led, 0));
 117         else
 118                 led = bus_space_read_1(sc->sc_tag, sc->sc_led, 0);
 119
 120         led = led ^ AUXIO_LED_LED;
 121         if (sc->sc_flags & AUXIO_EBUS)
 122                 bus_space_write_4(sc->sc_tag, sc->sc_led, 0, htole32(led));
 123         else
 124                 bus_space_write_1(sc->sc_tag, sc->sc_led, 0, led);
 125         splx(s);
 126
 127         /*
 128          * Blink rate is:
 129          *      full cycle every second if completely idle (loadav = 0)
 130          *      full cycle every 2 seconds if loadav = 1
 131          *      full cycle every 3 seconds if loadav = 2
 132          * etc.
 133          */
 134         s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
 135         callout_reset(&blink_ch, s, auxio_blink, sc);
 136 }
 137 #endif
 138
 139 void
 140 auxio_attach_common(struct auxio_softc *sc)
 141 {
 142 #ifdef BLINK
 143         static int do_once = 1;
 144
 145         /* only start one blinker */
 146         if (do_once) {
 147                 callout_init(&blink_ch, 0);
 148                 auxio_blink(sc);
 149                 do_once = 0;
 150         }
 151 #endif
 152         printf("\n");
 153 }
 154
 155 int
 156 auxio_ebus_match(struct device *parent, struct cfdata *cf, void *aux)
 157 {
 158         struct ebus_attach_args *ea = aux;
 159
 160         return (strcmp(AUXIO_ROM_NAME, ea->ea_name) == 0);
 161 }
 162
 163 void
 164 auxio_ebus_attach(struct device *parent, struct device *self, void *aux)
 165 {
 166         struct auxio_softc *sc = (struct auxio_softc *)self;
 167         struct ebus_attach_args *ea = aux;
 168
 169         sc->sc_tag = ea->ea_bustag;
 170
 171         if (ea->ea_nreg < 1) {
 172                 printf(": no registers??\n");
 173                 return;
 174         }
 175
 176         if (ea->ea_nreg != 5) {
 177                 printf(": not 5 (%d) registers, only setting led",
 178                     ea->ea_nreg);
 179                 sc->sc_flags = AUXIO_LEDONLY|AUXIO_EBUS;
 180         } else if (ea->ea_nvaddr == 5) {
 181                 sc->sc_flags = AUXIO_EBUS;
 182
 183                 sparc_promaddr_to_handle(sc->sc_tag,
 184                         ea->ea_vaddr[1], &sc->sc_pci);
 185                 sparc_promaddr_to_handle(sc->sc_tag,
 186                         ea->ea_vaddr[2], &sc->sc_freq);
 187                 sparc_promaddr_to_handle(sc->sc_tag,
 188                         ea->ea_vaddr[3], &sc->sc_scsi);
 189                 sparc_promaddr_to_handle(sc->sc_tag,
 190                         ea->ea_vaddr[4], &sc->sc_temp);
 191         } else {
 192                 sc->sc_flags = AUXIO_EBUS;
 193                 bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[1]),
 194                         ea->ea_reg[1].size, 0, &sc->sc_pci);
 195                 bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[2]),
 196                         ea->ea_reg[2].size, 0, &sc->sc_freq);
 197                 bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[3]),
 198                         ea->ea_reg[3].size, 0, &sc->sc_scsi);
 199                 bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[4]),
 200                         ea->ea_reg[4].size, 0, &sc->sc_temp);
 201         }
 202
 203         if (ea->ea_nvaddr > 0) {
 204                 sparc_promaddr_to_handle(sc->sc_tag,
 205                         ea->ea_vaddr[0], &sc->sc_led);
 206         } else {
 207                 bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
 208                         ea->ea_reg[0].size, 0, &sc->sc_led);
 209         }
 210
 211         auxio_attach_common(sc);
 212 }
 213
 214 int
 215 auxio_sbus_match(struct device *parent, struct cfdata *cf, void *aux)
 216 {
 217         struct sbus_attach_args *sa = aux;
 218
 219         return (strcmp(AUXIO_ROM_NAME, sa->sa_name) == 0);
 220 }
 221
 222 void
 223 auxio_sbus_attach(struct device *parent, struct device *self, void *aux)
 224 {
 225         struct auxio_softc *sc = (struct auxio_softc *)self;
 226         struct sbus_attach_args *sa = aux;
 227
 228         sc->sc_tag = sa->sa_bustag;
 229
 230         if (sa->sa_nreg < 1) {
 231                 printf(": no registers??\n");
 232                 return;
 233         }
 234
 235         if (sa->sa_nreg != 1) {
 236                 printf(": not 1 (%d/%d) registers??", sa->sa_nreg,
 237                     sa->sa_npromvaddrs);
 238                 return;
 239         }
 240
 241         /* sbus auxio only has one set of registers */
 242         sc->sc_flags = AUXIO_LEDONLY|AUXIO_SBUS;
 243         if (sa->sa_npromvaddrs > 0) {
 244                 sbus_promaddr_to_handle(sc->sc_tag,
 245                         sa->sa_promvaddr, &sc->sc_led);
 246         } else {
 247                 sbus_bus_map(sc->sc_tag, sa->sa_slot, sa->sa_offset,
 248                         sa->sa_size, 0, &sc->sc_led);
 249         }
 250
 251         auxio_attach_common(sc);
 252 }
 253
 254 int
 255 auxio_fd_control(u_int32_t bits)
 256 {
 257         struct auxio_softc *sc;
 258         u_int32_t led;
 259
 260         if (auxio_cd.cd_ndevs == 0) {
 261                 return ENXIO;
 262         }
 263
 264         /*
 265          * XXX This does not handle > 1 auxio correctly.
 266          * We'll assume the floppy drive is tied to first auxio found.
 267          */
 268         sc = device_lookup_private(&auxio_cd, 0);
 269         if (sc->sc_flags & AUXIO_EBUS)
 270                 led = le32toh(bus_space_read_4(sc->sc_tag, sc->sc_led, 0));
 271         else
 272                 led = bus_space_read_1(sc->sc_tag, sc->sc_led, 0);
 273
 274         led = (led & ~AUXIO_LED_FLOPPY_MASK) | bits;
 275
 276         if (sc->sc_flags & AUXIO_EBUS)
 277                 bus_space_write_4(sc->sc_tag, sc->sc_led, 0, htole32(led));
 278         else
 279                 bus_space_write_1(sc->sc_tag, sc->sc_led, 0, led);
 280
 281         return 0;
 282 }