sys/arch/sun2/dev/zs_any.c

   1 /*      $NetBSD: zs_any.c,v 1.17 2008/03/29 19:15:35 tsutsui Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Gordon W. Ross and Matthew Fredette.
   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 /*
  33  * Zilog Z8530 Dual UART driver (machine-dependent part)
  34  *
  35  * Runs two serial lines per chip using slave drivers.
  36  * Plain tty/async lines use the zs_async slave.
  37  * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves.
  38  */
  39
  40 #include <sys/cdefs.h>
  41 __KERNEL_RCSID(0, "$NetBSD: zs_any.c,v 1.17 2008/03/29 19:15:35 tsutsui Exp $");
  42
  43 #include "opt_kgdb.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/conf.h>
  48 #include <sys/device.h>
  49 #include <sys/file.h>
  50 #include <sys/ioctl.h>
  51 #include <sys/kernel.h>
  52 #include <sys/proc.h>
  53 #include <sys/tty.h>
  54 #include <sys/time.h>
  55 #include <sys/syslog.h>
  56
  57 #include <machine/autoconf.h>
  58 #include <machine/bus.h>
  59 #include <machine/z8530var.h>
  60
  61 #ifdef  KGDB
  62 #include <uvm/uvm_extern.h>
  63
  64 #include <machine/idprom.h>
  65 #include <machine/pmap.h>
  66 #include <sun2/dev/cons.h>
  67 #endif
  68
  69 #include <sun2/sun2/machdep.h>
  70 #include <dev/ic/z8530reg.h>
  71 #include <dev/sun/kbd_reg.h>
  72
  73 /****************************************************************
  74  * Autoconfig
  75  ****************************************************************/
  76
  77 /* Definition of the driver for autoconfig. */
  78 static int      zs_any_match(device_t, cfdata_t, void *);
  79 static void     zs_any_attach(device_t, device_t, void *);
  80
  81 CFATTACH_DECL_NEW(zs_obio, sizeof(struct zsc_softc),
  82     zs_any_match, zs_any_attach, NULL, NULL);
  83
  84 CFATTACH_DECL_NEW(zs_obmem, sizeof(struct zsc_softc),
  85     zs_any_match, zs_any_attach, NULL, NULL);
  86
  87 CFATTACH_DECL_NEW(zs_mbmem, sizeof(struct zsc_softc),
  88     zs_any_match, zs_any_attach, NULL, NULL);
  89
  90 /*
  91  * Is the zs chip present?
  92  */
  93 static int
  94 zs_any_match(device_t parent, cfdata_t cf, void *aux)
  95 {
  96         struct mainbus_attach_args *ma = aux;
  97         bus_space_handle_t bh;
  98         int matched;
  99
 100         /* Make sure there is something there... */
 101         if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice),
 102                           0, &bh))
 103                 return (0);
 104         matched = (bus_space_peek_1(ma->ma_bustag, bh, 0, NULL) == 0);
 105         bus_space_unmap(ma->ma_bustag, bh, sizeof(struct zsdevice));
 106         if (!matched)
 107                 return (0);
 108
 109         /* Default interrupt priority (always splbio==2) */
 110         if (ma->ma_pri == -1)
 111                 ma->ma_pri = ZSHARD_PRI;
 112
 113         return (1);
 114 }
 115
 116 /*
 117  * Attach a found zs.
 118  */
 119 static void
 120 zs_any_attach(device_t parent, device_t self, void *aux)
 121 {
 122         struct zsc_softc *zsc = device_private(self);
 123         struct mainbus_attach_args *ma = aux;
 124         bus_space_handle_t bh;
 125
 126         zsc->zsc_dev = self;
 127         zsc->zsc_bustag = ma->ma_bustag;
 128         zsc->zsc_dmatag = ma->ma_dmatag;
 129         /* XXX device_unit() abuse */
 130         zsc->zsc_promunit = device_unit(self);
 131         zsc->zsc_node = 0;
 132
 133         /* Map in the device. */
 134         if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice),
 135                           BUS_SPACE_MAP_LINEAR, &bh)) {
 136                 aprint_normal("\n");
 137                 panic("%s: can't map", __func__);
 138         }
 139
 140         /* This is where we break the bus_space(9) abstraction: */
 141         zs_attach(zsc, (void *)bh, ma->ma_pri);
 142 }
 143
 144 int
 145 zs_console_flags(int promunit, int node, int channel)
 146 {
 147         int cookie, flags = 0;
 148
 149         /*
 150          * Use `promunit' and `channel' to derive the PROM
 151          * stdio handles that correspond to this device.
 152          */
 153         if (promunit == 0)
 154                 cookie = PROMDEV_TTYA + channel;
 155         else if (promunit == 1 && channel == 0)
 156                 cookie = PROMDEV_KBD;
 157         else
 158                 cookie = -1;
 159
 160         /*
 161          * We have the console keyboard only if it's a Sun-2
 162          * keyboard or better. (i.e., not a Sun-1 parallel kbd).
 163          */
 164         if (cookie == prom_stdin() &&
 165             (cookie != PROMDEV_KBD || prom_kbdid() >= KB_SUN2))
 166                 flags |= ZS_HWFLAG_CONSOLE_INPUT;
 167
 168         /*
 169          * Prevent the keyboard from matching the output device
 170          * (note that PROMDEV_KBD == PROMDEV_SCREEN == 0!).
 171          */
 172         if (cookie != PROMDEV_KBD && cookie == prom_stdout())
 173                 flags |= ZS_HWFLAG_CONSOLE_OUTPUT;
 174
 175         return (flags);
 176 }
 177
 178 #ifdef  KGDB
 179 /*
 180  * Find a zs mapped by the PROM.  Currently this only works to find
 181  * zs0 on obio.
 182  */
 183 void *
 184 zs_find_prom(int unit)
 185 {
 186         bus_addr_t zs0_phys;
 187         vaddr_t va;
 188
 189         if (unit != 0)
 190                 return (NULL);
 191
 192         /*
 193          * The physical address of zs0 is model-dependent.
 194          */
 195         zs0_phys = (cpu_machine_id == ID_SUN2_120 ? 0x002000 : 0x7f2000);
 196         if (find_prom_map(zs0_phys, PMAP_OBIO, sizeof(struct zsdevice), &va))
 197                 return (NULL);
 198
 199         return (void *)va;
 200 }
 201 #endif  /* KGDB */