sys/arch/arm/gemini/gemini_com.c

   1 /*      $NetBSD: gemini_com.c,v 1.1 2008/10/24 04:23:18 matt Exp $      */
   2
   3 /* adapted from:
   4  *      NetBSD: omap_com.c,v 1.2 2008/03/14 15:09:09 cube Exp
   5  */
   6
   7 /*
   8  * Based on arch/arm/xscale/pxa2x0_com.c
   9  *
  10  * Copyright 2003 Wasabi Systems, Inc.
  11  * All rights reserved.
  12  *
  13  * Written by Steve C. Woodford for Wasabi Systems, Inc.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  * 3. All advertising materials mentioning features or use of this software
  24  *    must display the following acknowledgement:
  25  *      This product includes software developed for the NetBSD Project by
  26  *      Wasabi Systems, Inc.
  27  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  28  *    or promote products derived from this software without specific prior
  29  *    written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  33  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  34  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  35  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  36  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  37  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  38  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  39  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGE.
  42  */
  43
  44 #include <sys/cdefs.h>
  45 __KERNEL_RCSID(0, "$NetBSD: gemini_com.c,v 1.1 2008/10/24 04:23:18 matt Exp $");
  46
  47 #include "opt_com.h"
  48
  49 #include <sys/param.h>
  50 #include <sys/systm.h>
  51 #include <sys/device.h>
  52 #include <sys/termios.h>
  53
  54 #include <machine/intr.h>
  55 #include <machine/bus.h>
  56
  57 #include <arm/pic/picvar.h>
  58
  59 #include <dev/ic/comreg.h>
  60 #include <dev/ic/comvar.h>
  61
  62 #include <arm/gemini/gemini_reg.h>
  63 #include <arm/gemini/gemini_obiovar.h>
  64
  65 #include <arm/gemini/gemini_com.h>
  66
  67 #include "locators.h"
  68
  69 static int      gemini_com_match(device_t, cfdata_t , void *);
  70 static void     gemini_com_attach(device_t, device_t, void *);
  71
  72 CFATTACH_DECL_NEW(gemini_com, sizeof(struct com_softc),
  73     gemini_com_match, gemini_com_attach, NULL, NULL);
  74
  75 static int
  76 gemini_com_match(device_t parent, cfdata_t cf, void *aux)
  77 {
  78         struct obio_attach_args *obio = aux;
  79         bus_space_handle_t bh;
  80         int rv;
  81
  82         if (obio->obio_addr == -1 || obio->obio_intr == -1)
  83             panic("gemini_com must have addr and intr specified in config.");
  84
  85         if (obio->obio_size == 0)
  86                 obio->obio_size = GEMINI_UART_SIZE;
  87
  88         if (com_is_console(obio->obio_iot, obio->obio_addr, NULL))
  89                 return (1);
  90
  91         if (bus_space_map(obio->obio_iot, obio->obio_addr, obio->obio_size,
  92                           0, &bh))
  93                 return (0);
  94
  95         rv = comprobe1(obio->obio_iot, bh);
  96
  97         bus_space_unmap(obio->obio_iot, bh, obio->obio_size);
  98
  99         return (rv);
 100 }
 101
 102 static void
 103 gemini_com_attach(device_t parent, device_t self, void *aux)
 104 {
 105         struct com_softc *sc = device_private(self);
 106         struct obio_attach_args *obio = aux;
 107         bus_space_tag_t iot;
 108         bus_space_handle_t ioh;
 109         bus_addr_t iobase;
 110
 111         sc->sc_dev = self;
 112         iot = obio->obio_iot;
 113         iobase = obio->obio_addr;
 114         sc->sc_frequency = GEMINI_COM_FREQ;
 115         sc->sc_type = COM_TYPE_16550_NOERS;
 116
 117         if (com_is_console(iot, iobase, &ioh) == 0 &&
 118             bus_space_map(iot, iobase, obio->obio_size, 0, &ioh)) {
 119                 panic(": can't map registers\n");
 120                 return;
 121         }
 122         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 123
 124         com_attach_subr(sc);
 125         aprint_naive("\n");
 126
 127         intr_establish(obio->obio_intr, IPL_SERIAL, IST_LEVEL_HIGH,
 128                 comintr, sc);
 129 }