sys/dev/pci/com_puc.c

   1 /*      $NetBSD: com_puc.c,v 1.18 2008/03/14 15:09:11 cube Exp $        */
   2
   3 /*
   4  * Copyright (c) 1998 Christopher G. Demetriou.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Christopher G. Demetriou
  17  *      for the NetBSD Project.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Machine-independent ns16x50 serial port ('com') driver attachment to
  35  * "PCI Universal Communications" controller driver.
  36  *
  37  * Author: Christopher G. Demetriou, May 17, 1998.
  38  */
  39
  40 #include <sys/cdefs.h>
  41 __KERNEL_RCSID(0, "$NetBSD: com_puc.c,v 1.18 2008/03/14 15:09:11 cube Exp $");
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/device.h>
  46 #include <sys/tty.h>
  47
  48 #include <sys/bus.h>
  49
  50 #include <dev/pci/pcivar.h>
  51 #include <dev/pci/pucvar.h>
  52 #include <dev/ic/comreg.h>
  53 #include <dev/ic/comvar.h>
  54 #include <dev/pci/cybervar.h>
  55
  56 struct com_puc_softc {
  57         struct com_softc sc_com;        /* real "com" softc */
  58
  59         /* puc-specific goo. */
  60         void    *sc_ih;                 /* interrupt handler */
  61 };
  62
  63 static int
  64 com_puc_probe(device_t parent, cfdata_t match, void *aux)
  65 {
  66         struct puc_attach_args *aa = aux;
  67
  68         /*
  69          * Locators already matched, just check the type.
  70          */
  71         if (aa->type != PUC_PORT_TYPE_COM)
  72                 return (0);
  73
  74         return (1);
  75 }
  76
  77 static void
  78 com_puc_attach(device_t parent, device_t self, void *aux)
  79 {
  80         struct com_puc_softc *psc = device_private(self);
  81         struct com_softc *sc = &psc->sc_com;
  82         struct puc_attach_args *aa = aux;
  83         const char *intrstr;
  84
  85         sc->sc_dev = self;
  86
  87         /*
  88          * XXX This driver assumes that 'com' ports attached to 'puc'
  89          * XXX can not be console.  That isn't unreasonable, because PCI
  90          * XXX devices are supposed to be dynamically mapped, and com
  91          * XXX console ports want fixed addresses.  When/if baseboard
  92          * XXX 'com' ports are identified as PCI/communications/serial
  93          * XXX devices and are known to be mapped at the standard
  94          * XXX addresses, if they can be the system console then we have
  95          * XXX to cope with doing the mapping right.  Then this will get
  96          * XXX really ugly.  Of course, by then we might know the real
  97          * XXX definition of PCI/communications/serial, and attach 'com'
  98          * XXX directly on PCI.
  99          */
 100
 101         aprint_naive(": Serial port\n");
 102
 103         COM_INIT_REGS(sc->sc_regs, aa->t, aa->h, aa->a);
 104         sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
 105
 106         /* Enable Cyberserial 8X clock. */
 107         if (aa->flags & (PUC_COM_SIIG10x|PUC_COM_SIIG20x)) {
 108                 int usrregno;
 109
 110                 if      (aa->flags & PUC_PORT_USR3) usrregno = 3;
 111                 else if (aa->flags & PUC_PORT_USR2) usrregno = 2;
 112                 else if (aa->flags & PUC_PORT_USR1) usrregno = 1;
 113                 else /* (aa->flags & PUC_PORT_USR0) */ usrregno = 0;
 114
 115                 if (aa->flags & PUC_COM_SIIG10x)
 116                         write_siig10x_usrreg(aa->pc, aa->tag, usrregno, 1);
 117                 else
 118                         write_siig20x_usrreg(aa->pc, aa->tag, usrregno, 1);
 119         }
 120
 121         intrstr = pci_intr_string(aa->pc, aa->intrhandle);
 122         psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
 123             comintr, sc);
 124         if (psc->sc_ih == NULL) {
 125                 aprint_error(": couldn't establish interrupt");
 126                 if (intrstr != NULL)
 127                         aprint_error(" at %s", intrstr);
 128                 aprint_error("\n");
 129                 return;
 130         }
 131         aprint_normal(": interrupting at %s\n", intrstr);
 132         aprint_normal("%s", device_xname(self));
 133
 134         com_attach_subr(sc);
 135 }
 136
 137 CFATTACH_DECL_NEW(com_puc, sizeof(struct com_puc_softc),
 138     com_puc_probe, com_puc_attach, NULL, NULL);