sys/arch/mvme68k/dev/zs_pcctwo.c

   1 /*      $NetBSD: zs_pcctwo.c,v 1.13 2008/03/29 19:15:35 tsutsui Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2000 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, Jason R. Thorpe and Steve C. Woodford.
   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  *
  38  * Modified for NetBSD/mvme68k by Jason R. Thorpe <thorpej@NetBSD.org>
  39  *
  40  * Modified to attach to the PCCchip2/MCchip backend by Steve Woodford.
  41  */
  42
  43 #include <sys/cdefs.h>
  44 __KERNEL_RCSID(0, "$NetBSD: zs_pcctwo.c,v 1.13 2008/03/29 19:15:35 tsutsui Exp $");
  45
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/proc.h>
  49 #include <sys/device.h>
  50 #include <sys/conf.h>
  51 #include <sys/file.h>
  52 #include <sys/ioctl.h>
  53 #include <sys/tty.h>
  54 #include <sys/time.h>
  55 #include <sys/kernel.h>
  56 #include <sys/syslog.h>
  57
  58 #include <dev/cons.h>
  59 #include <dev/ic/z8530reg.h>
  60 #include <machine/z8530var.h>
  61
  62 #include <machine/cpu.h>
  63 #include <machine/bus.h>
  64
  65 #include <dev/mvme/pcctworeg.h>
  66 #include <dev/mvme/pcctwovar.h>
  67
  68 #include <mvme68k/dev/mainbus.h>
  69 #include <mvme68k/dev/zsvar.h>
  70
  71 #include "ioconf.h"
  72
  73 /* Definition of the driver for autoconfig. */
  74 static int      zsc_pcctwo_match(device_t, cfdata_t, void *);
  75 static void     zsc_pcctwo_attach(device_t, device_t, void *);
  76
  77 CFATTACH_DECL_NEW(zsc_pcctwo, sizeof(struct zsc_softc),
  78     zsc_pcctwo_match, zsc_pcctwo_attach, NULL, NULL);
  79
  80 cons_decl(zsc_pcctwo);
  81
  82
  83 /*
  84  * Is the zs chip present?
  85  */
  86 static int
  87 zsc_pcctwo_match(device_t parent, cfdata_t cf, void *aux)
  88 {
  89         struct pcctwo_attach_args *pa = aux;
  90
  91         if (strcmp(pa->pa_name, zsc_cd.cd_name) ||
  92             (machineid != MVME_162 && machineid != MVME_172))
  93                 return 0;
  94
  95         pa->pa_ipl = cf->pcctwocf_ipl;
  96         if (pa->pa_ipl == -1)
  97                 pa->pa_ipl = ZSHARD_PRI;
  98         return 1;
  99 }
 100
 101 /*
 102  * Attach a found zs.
 103  */
 104 static void
 105 zsc_pcctwo_attach(device_t parent, device_t self, void *aux)
 106 {
 107         struct zsc_softc *zsc = device_private(self);
 108         struct pcctwo_attach_args *pa = aux;
 109         struct zsdevice zs;
 110         bus_space_handle_t bush;
 111         int zs_level;
 112         static int vector = MCCHIPV_ZS0;
 113
 114         zsc->zsc_dev = self;
 115
 116         /* Map the device's registers */
 117         bus_space_map(pa->pa_bust, pa->pa_offset, 8, 0, &bush);
 118
 119         zs_level = pa->pa_ipl;
 120
 121         /* XXX: This is a gross hack. I need to bus-space zs.c ... */
 122         zs.zs_chan_b.zc_csr = (volatile uint8_t *)bush + 1;
 123         zs.zs_chan_b.zc_data = (volatile uint8_t *)bush + 3;
 124         zs.zs_chan_a.zc_csr = (volatile uint8_t *)bush + 5;
 125         zs.zs_chan_a.zc_data = (volatile uint8_t *)bush + 7;
 126
 127         /* Do common parts of SCC configuration. */
 128         zs_config(zsc, &zs, vector + PCCTWO_VECBASE, PCLK_162);
 129
 130         evcnt_attach_dynamic(&zsc->zsc_evcnt, EVCNT_TYPE_INTR,
 131             pcctwointr_evcnt(zs_level), "rs232", device_xname(zsc->zsc_dev));
 132
 133         /*
 134          * Now safe to install interrupt handlers.
 135          */
 136         pcctwointr_establish(vector++, zshard_unshared, zs_level, zsc, NULL);
 137
 138         /*
 139          * Set master interrupt enable.
 140          */
 141         zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]);
 142 }
 143
 144 /****************************************************************
 145  * Console support functions (MVME PCC specific!)
 146  ****************************************************************/
 147
 148 /*
 149  * Check for SCC console.  The MVME-1x2 always uses unit 0 chan 0.
 150  */
 151 void
 152 zsc_pcctwocnprobe(struct consdev *cp)
 153 {
 154         extern const struct cdevsw zstty_cdevsw;
 155
 156         if (machineid != MVME_162 && machineid != MVME_172) {
 157                 cp->cn_pri = CN_DEAD;
 158                 return;
 159         }
 160
 161         /* Initialize required fields. */
 162         cp->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0);
 163         cp->cn_pri = CN_NORMAL;
 164 }
 165
 166 void
 167 zsc_pcctwocninit(struct consdev *cp)
 168 {
 169         bus_space_handle_t bush;
 170         struct zsdevice zs;
 171
 172         bus_space_map(&_mainbus_space_tag,
 173             intiobase_phys + MAINBUS_PCCTWO_OFFSET + MCCHIP_ZS0_OFF, 8, 0,
 174             &bush);
 175
 176         /* XXX: This is a gross hack. I need to bus-space zs.c ... */
 177         zs.zs_chan_b.zc_csr = (volatile uint8_t *)bush + 1;
 178         zs.zs_chan_b.zc_data = (volatile uint8_t *)bush + 3;
 179         zs.zs_chan_a.zc_csr = (volatile uint8_t *)bush + 5;
 180         zs.zs_chan_a.zc_data = (volatile uint8_t *)bush + 7;
 181
 182         /* Do common parts of console init. */
 183         zs_cnconfig(0, 0, &zs, PCLK_162);
 184 }