sys/arch/arm/xscale/ixp425_com.c

   1 /*      $NetBSD: ixp425_com.c,v 1.16 2006/07/13 22:56:00 gdamore Exp $  */
   2
   3 /*
   4  * Copyright 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Steve C. Woodford for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <sys/cdefs.h>
  39 __KERNEL_RCSID(0, "$NetBSD: ixp425_com.c,v 1.16 2006/07/13 22:56:00 gdamore Exp $");
  40
  41 #include "opt_com.h"
  42 #ifndef COM_PXA2X0
  43 #error "You must use options COM_PXA2X0 to get IXP425 serial port support"
  44 #endif
  45
  46 #include <sys/systm.h>
  47 #include <sys/param.h>
  48 #include <sys/device.h>
  49 #include <sys/termios.h>
  50
  51 #include <machine/intr.h>
  52 #include <machine/bus.h>
  53
  54 #include <dev/ic/comreg.h>
  55 #include <dev/ic/comvar.h>
  56
  57 #include <arm/xscale/ixp425reg.h>
  58 #include <arm/xscale/ixp425var.h>
  59 #include <arm/xscale/ixp425_sipvar.h>
  60
  61 static int      ixsipcom_match(device_t, cfdata_t , void *);
  62 static void     ixsipcom_attach(device_t, device_t, void *);
  63
  64 CFATTACH_DECL_NEW(ixsipcom, sizeof(struct com_softc),
  65     ixsipcom_match, ixsipcom_attach, NULL, NULL);
  66
  67 static const int uart_irq[] = {IXP425_INT_UART0, IXP425_INT_UART1};
  68
  69 static int
  70 ixsipcom_match(device_t parent, cfdata_t match, void *aux)
  71 {
  72         struct ixpsip_attach_args *sa = aux;
  73         bus_space_tag_t bt = &ixp425_a4x_bs_tag;
  74         bus_space_handle_t bh;
  75         int rv;
  76
  77         if (strcmp(match->cf_name, "ixsipcom") == 0)
  78                 return 1;
  79
  80         if (com_is_console(bt, sa->sa_addr, NULL))
  81                 return (1);
  82
  83         if (bus_space_map(bt, sa->sa_addr, sa->sa_size, 0, &bh))
  84                 return (0);
  85
  86         /* Make sure the UART is enabled */
  87         bus_space_write_1(bt, bh, com_ier, IER_EUART);
  88
  89         rv = comprobe1(bt, bh);
  90         bus_space_unmap(bt, bh, sa->sa_size);
  91
  92         return (rv);
  93 }
  94
  95 static void
  96 ixsipcom_attach(device_t parent, device_t self, void *aux)
  97 {
  98         struct com_softc *sc = device_private(self);
  99         struct ixpsip_attach_args *sa = aux;
 100         bus_space_tag_t iot;
 101         bus_space_handle_t ioh;
 102         bus_addr_t iobase;
 103
 104         sc->sc_dev = self;
 105         iot = &ixp425_a4x_bs_tag;
 106         iobase = sa->sa_addr;
 107         sc->sc_frequency = IXP425_UART_FREQ;
 108         sc->sc_type = COM_TYPE_PXA2x0;
 109
 110         if (com_is_console(iot, iobase, &ioh) == 0 &&
 111             bus_space_map(iot, iobase, sa->sa_size, 0, &ioh)) {
 112                 aprint_error(": can't map registers\n");
 113                 return;
 114         }
 115         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 116
 117         com_attach_subr(sc);
 118
 119         ixp425_intr_establish(uart_irq[sa->sa_index], IPL_SERIAL, comintr, sc);
 120 }