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pxa2x0_com.c revision 1.1 
      1 /*	$NetBSD: pxa2x0_com.c,v 1.1 2003/06/05 13:48:27 scw 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 "opt_com.h"
     39 
     40 #ifndef COM_PXA2X0
     41 #error "You must use options COM_PXA2X0 to get PXA2x0 serial port support"
     42 #endif
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/device.h>
     47 #include <sys/termios.h>
     48 
     49 #include <machine/intr.h>
     50 #include <machine/bus.h>
     51 
     52 #include <dev/ic/comreg.h>
     53 #include <dev/ic/comvar.h>
     54 
     55 #include <arm/xscale/pxa2x0reg.h>
     56 #include <arm/xscale/pxa2x0var.h>
     57 
     58 #include "locators.h"
     59 
     60 static int	pxauart_match(struct device *, struct cfdata *, void *);
     61 static void	pxauart_attach(struct device *, struct device *, void *);
     62 
     63 CFATTACH_DECL(pxauart, sizeof(struct com_softc),
     64     pxauart_match, pxauart_attach, NULL, NULL);
     65 
     66 static int
     67 pxauart_match(struct device *parent, struct cfdata *cf, void *aux)
     68 {
     69 	struct pxaip_attach_args *pxa = aux;
     70 	bus_space_tag_t bt = &pxa2x0_a4x_bs_tag;	/* XXX: This sucks */
     71 	bus_space_handle_t bh;
     72 	int rv;
     73 
     74 	switch (pxa->pxa_addr) {
     75 	case PXA2X0_FFUART_BASE:
     76 		if (pxa->pxa_intr != PXA2X0_INT_FFUART)
     77 			return (0);
     78 		break;
     79 
     80 	case PXA2X0_STUART_BASE:
     81 		if (pxa->pxa_intr != PXA2X0_INT_STUART)
     82 			return (0);
     83 		break;
     84 
     85 #if 0
     86 	case PXA2X0_BTUART_BASE:	/* XXX: Config file option ... */
     87 		if (pxa->pxa_intr != PXA2X0_INT_BTUART)
     88 			return (0);
     89 		break;
     90 #endif
     91 
     92 	default:
     93 		return (0);
     94 	}
     95 
     96 	pxa->pxa_size = 0x20;
     97 
     98 	if (com_is_console(bt, pxa->pxa_addr, NULL))
     99 		return (1);
    100 
    101 	if (bus_space_map(bt, pxa->pxa_addr, pxa->pxa_size, 0, &bh))
    102 		return (0);
    103 
    104 	/* Make sure the UART is enabled */
    105 	bus_space_write_1(bt, bh, com_ier, IER_EUART);
    106 
    107 	rv = comprobe1(bt, bh);
    108 	bus_space_unmap(bt, bh, pxa->pxa_size);
    109 
    110 	return (rv);
    111 }
    112 
    113 static void
    114 pxauart_attach(struct device *parent, struct device *self, void *aux)
    115 {
    116 	struct com_softc *sc = (struct com_softc *)self;
    117 	struct pxaip_attach_args *pxa = aux;
    118 
    119 	sc->sc_iot = &pxa2x0_a4x_bs_tag;	/* XXX: This sucks */
    120 	sc->sc_iobase = pxa->pxa_addr;
    121 	sc->sc_frequency = PXA2X0_COM_FREQ;
    122 	sc->sc_hwflags = COM_HW_PXA2X0;
    123 
    124 	if (com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) == 0 &&
    125 	    bus_space_map(sc->sc_iot, sc->sc_iobase, pxa->pxa_size, 0,
    126 			  &sc->sc_ioh)) {
    127 		printf(": can't map registers\n");
    128 		return;
    129 	}
    130 
    131 	com_attach_subr(sc);
    132 
    133 	pxa2x0_intr_establish(pxa->pxa_intr, IPL_SERIAL, comintr, sc);
    134 }
    135