sys/arch/hp700/dev/com_ssio.c

   1 /*      $NetBSD$        */
   2
   3 /*      $OpenBSD: com_ssio.c,v 1.2 2007/06/24 16:28:39 kettenis Exp $   */
   4
   5 /*
   6  * Copyright (c) 2007 Mark Kettenis
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20
  21 #include <sys/param.h>
  22 #include <sys/systm.h>
  23 #include <sys/device.h>
  24 #include <sys/tty.h>
  25
  26 #include <machine/bus.h>
  27 #include <machine/iomod.h>
  28
  29 #include <dev/ic/comreg.h>
  30 #include <dev/ic/comvar.h>
  31
  32 #include <hp700/hp700/machdep.h>
  33 #include <hp700/dev/ssiovar.h>
  34
  35 void *ssio_intr_establish(int, int, int (*)(void *), void *,
  36     const char *);
  37
  38 #define COM_SSIO_FREQ   1843200
  39
  40 struct com_ssio_softc {
  41         struct  com_softc sc_com;       /* real "com" softc */
  42         void    *sc_ih;                 /* interrupt handler */
  43 };
  44
  45 int     com_ssio_match(device_t, cfdata_t, void *);
  46 void    com_ssio_attach(device_t, device_t, void *);
  47
  48 CFATTACH_DECL_NEW(com_ssio, sizeof(struct com_ssio_softc), com_ssio_match,
  49     com_ssio_attach, NULL, NULL);
  50
  51 int
  52 com_ssio_match(device_t parent, cfdata_t match, void *aux)
  53 {
  54         cfdata_t cf = match;
  55         struct ssio_attach_args *saa = aux;
  56
  57         if (strcmp(saa->saa_name, "com") != 0)
  58                 return (0);
  59
  60         /* Check locators. */
  61         if (cf->ssiocf_irq != SSIO_UNK_IRQ && cf->ssiocf_irq != saa->saa_irq)
  62                 return (0);
  63
  64         return (1);
  65 }
  66
  67 void
  68 com_ssio_attach(device_t parent, device_t self, void *aux)
  69 {
  70         struct com_ssio_softc *sc_ssio = device_private(self);
  71         struct com_softc *sc = &sc_ssio->sc_com;
  72         struct ssio_attach_args *saa = aux;
  73         int pagezero_cookie;
  74
  75         bus_addr_t iobase;
  76         bus_space_handle_t ioh;
  77         bus_space_tag_t iot;
  78
  79         sc->sc_dev = self;
  80         iobase = saa->saa_iobase;
  81         iot = saa->saa_iot;
  82         if (bus_space_map(iot, iobase, COM_NPORTS,
  83             0, &ioh)) {
  84                 aprint_error(": can't map I/O space\n");
  85                 return;
  86         }
  87
  88         pagezero_cookie = hp700_pagezero_map();
  89         if (PAGE0->mem_cons.pz_class == PCL_DUPLEX &&
  90             PAGE0->mem_cons.pz_hpa == (struct iomod *)iobase) {
  91                 bus_space_unmap(iot, ioh, COM_NPORTS);
  92                 if (comcnattach(iot, iobase, B9600, COM_SSIO_FREQ,
  93                     COM_TYPE_NORMAL,
  94                     (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) {
  95                         aprint_error(": can't comcnattach\n");
  96                         hp700_pagezero_unmap(pagezero_cookie);
  97                         return;
  98                 }
  99         }
 100         hp700_pagezero_unmap(pagezero_cookie);
 101
 102         sc->sc_frequency = COM_SSIO_FREQ;
 103         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 104         com_attach_subr(sc);
 105
 106         sc_ssio->sc_ih = ssio_intr_establish(IPL_TTY, saa->saa_irq,
 107             comintr, sc, device_xname(self));
 108 }