sys/arch/hp700/dev/com_dino.c

   1 /*      $OpenBSD: com_dino.c,v 1.4 2007/07/15 19:25:49 kettenis Exp $   */
   2
   3 /*
   4  * Copyright (c) 2004 Michael Shalayeff
   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 OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
  20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  25  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  26  * THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/device.h>
  32 #include <sys/tty.h>
  33
  34 #include <machine/bus.h>
  35 #include <machine/intr.h>
  36 #include <machine/iomod.h>
  37 #include <machine/autoconf.h>
  38
  39 #include <dev/ic/comreg.h>
  40 #include <dev/ic/comvar.h>
  41
  42 #include <hp700/dev/cpudevs.h>
  43 #include <hp700/hp700/machdep.h>
  44
  45 void *dino_intr_establish(void *sc, int irq, int pri,
  46     int (*handler)(void *v), void *arg);
  47
  48 #define COM_DINO_FREQ   7272700
  49
  50 struct com_dino_softc {
  51         struct  com_softc sc_com;       /* real "com" softc */
  52         void    *sc_ih;                 /* interrupt handler */
  53 };
  54
  55 struct com_dino_regs {
  56         uint8_t         reset;
  57         uint8_t         pad0[3];
  58         uint8_t         test;
  59 #define COM_DINO_PAR_LOOP       0x01
  60 #define COM_DINO_CLK_SEL        0x02
  61         uint8_t         pad1[3];
  62         uint32_t        iodc;
  63         uint8_t         pad2[0x54];
  64         uint8_t         dither;
  65 };
  66
  67 int     com_dino_match(device_t, cfdata_t, void *);
  68 void    com_dino_attach(device_t, device_t, void *);
  69
  70 CFATTACH_DECL_NEW(com_dino, sizeof(struct com_dino_softc), com_dino_match,
  71     com_dino_attach, NULL, NULL);
  72
  73 int
  74 com_dino_match(device_t parent, cfdata_t match, void *aux)
  75 {
  76         struct confargs *ca = aux;
  77
  78         if (ca->ca_type.iodc_type != HPPA_TYPE_FIO ||
  79             ca->ca_type.iodc_sv_model != HPPA_FIO_GRS232)
  80                 return (0);
  81
  82         return (1);
  83         /* HOZER comprobe1(ca->ca_iot, ca->ca_hpa + IOMOD_DEVOFFSET); */
  84 }
  85
  86 void
  87 com_dino_attach(device_t parent, device_t self, void *aux)
  88 {
  89         void *sc_dino = device_private(parent);
  90         struct com_dino_softc *sc_comdino = device_private(self);
  91         struct com_softc *sc = &sc_comdino->sc_com;
  92         struct confargs *ca = aux;
  93         struct com_dino_regs *regs = (struct com_dino_regs *)ca->ca_hpa;
  94         int pagezero_cookie;
  95
  96         bus_addr_t iobase;
  97         bus_space_handle_t ioh;
  98
  99         sc->sc_dev = self;
 100         iobase = (bus_addr_t)ca->ca_hpa + IOMOD_DEVOFFSET;
 101         sc->sc_frequency = COM_DINO_FREQ;
 102
 103         /* Test if this is the console.  Compare either HPA or device path. */
 104         pagezero_cookie = hp700_pagezero_map();
 105         if (PAGE0->mem_cons.pz_class == PCL_DUPLEX &&
 106             PAGE0->mem_cons.pz_hpa == (struct iomod *)ca->ca_hpa) {
 107
 108                 /*
 109                  * This port is the console.  In this case we must call
 110                  * comcnattach() and later com_is_console() to initialize
 111                  * everything properly.
 112                  */
 113
 114                 if (comcnattach(ca->ca_iot, iobase, B9600,
 115                     sc->sc_frequency, COM_TYPE_NORMAL,
 116                     (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) {
 117                         aprint_error(": can't comcnattach\n");
 118                         hp700_pagezero_unmap(pagezero_cookie);
 119                         return;
 120                 }
 121         }
 122         hp700_pagezero_unmap(pagezero_cookie);
 123
 124         /*
 125          * Get the already initialized console ioh via com_is_console() if
 126          * this is the console or map the I/O space if this isn't the console.
 127          */
 128
 129         if (!com_is_console(ca->ca_iot, iobase, &ioh) &&
 130             bus_space_map(ca->ca_iot, iobase, COM_NPORTS, 0, &ioh) != 0) {
 131                 aprint_error(": can't map I/O space\n");
 132                 return;
 133         }
 134         COM_INIT_REGS(sc->sc_regs, ca->ca_iot, ioh, iobase);
 135
 136         /* select clock freq */
 137         regs->test = COM_DINO_CLK_SEL;
 138
 139         com_attach_subr(sc);
 140
 141         ca->ca_irq = 10;
 142
 143         sc_comdino->sc_ih = dino_intr_establish(sc_dino, ca->ca_irq, IPL_TTY,
 144             comintr, sc);
 145 }