Home | History | Annotate | Line # | Download | only in xscale
pxa2x0_com.c revision 1.6.4.1 
      1 /*	$NetBSD: pxa2x0_com.c,v 1.6.4.1 2007/01/12 01:00:42 ad 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: pxa2x0_com.c,v 1.6.4.1 2007/01/12 01:00:42 ad Exp $");
     40 
     41 #include "opt_com.h"
     42 
     43 #ifndef COM_PXA2X0
     44 #error "You must use options COM_PXA2X0 to get PXA2x0 serial port support"
     45 #endif
     46 
     47 #include <sys/param.h>
     48 #include <sys/systm.h>
     49 #include <sys/device.h>
     50 #include <sys/termios.h>
     51 
     52 #include <machine/intr.h>
     53 #include <machine/bus.h>
     54 
     55 #include <dev/ic/comreg.h>
     56 #include <dev/ic/comvar.h>
     57 
     58 #include <arm/xscale/pxa2x0reg.h>
     59 #include <arm/xscale/pxa2x0var.h>
     60 
     61 #include "locators.h"
     62 
     63 static int	pxauart_match(struct device *, struct cfdata *, void *);
     64 static void	pxauart_attach(struct device *, struct device *, void *);
     65 
     66 CFATTACH_DECL(pxauart, sizeof(struct com_softc),
     67     pxauart_match, pxauart_attach, NULL, NULL);
     68 
     69 static int
     70 pxauart_match(struct device *parent, struct cfdata *cf, void *aux)
     71 {
     72 	struct pxaip_attach_args *pxa = aux;
     73 	bus_space_tag_t bt = &pxa2x0_a4x_bs_tag;	/* XXX: This sucks */
     74 	bus_space_handle_t bh;
     75 	int rv;
     76 
     77 	switch (pxa->pxa_addr) {
     78 	case PXA2X0_FFUART_BASE:
     79 		if (pxa->pxa_intr != PXA2X0_INT_FFUART)
     80 			return (0);
     81 		break;
     82 
     83 	case PXA2X0_STUART_BASE:
     84 		if (pxa->pxa_intr != PXA2X0_INT_STUART)
     85 			return (0);
     86 		break;
     87 
     88 	case PXA2X0_BTUART_BASE:	/* XXX: Config file option ... */
     89 		if (pxa->pxa_intr != PXA2X0_INT_BTUART)
     90 			return (0);
     91 		break;
     92 
     93 	case PXA2X0_HWUART_BASE:
     94 		if (pxa->pxa_intr != PXA2X0_INT_HWUART)
     95 			return (0);
     96 		break;
     97 
     98 	default:
     99 		return (0);
    100 	}
    101 
    102 	pxa->pxa_size = 0x20;
    103 
    104 	if (com_is_console(bt, pxa->pxa_addr, NULL))
    105 		return (1);
    106 
    107 	if (bus_space_map(bt, pxa->pxa_addr, pxa->pxa_size, 0, &bh))
    108 		return (0);
    109 
    110 	/* Make sure the UART is enabled */
    111 	bus_space_write_1(bt, bh, com_ier, IER_EUART);
    112 
    113 	rv = comprobe1(bt, bh);
    114 	bus_space_unmap(bt, bh, pxa->pxa_size);
    115 
    116 	return (rv);
    117 }
    118 
    119 static void
    120 pxauart_attach(struct device *parent, struct device *self, void *aux)
    121 {
    122 	struct com_softc *sc = (struct com_softc *)self;
    123 	struct pxaip_attach_args *pxa = aux;
    124 	bus_space_tag_t iot;
    125 	bus_space_handle_t ioh;
    126 	bus_addr_t iobase;
    127 
    128 	iot = &pxa2x0_a4x_bs_tag;	/* XXX: This sucks */
    129 	iobase = pxa->pxa_addr;
    130 	sc->sc_frequency = PXA2X0_COM_FREQ;
    131 	sc->sc_type = COM_TYPE_PXA2x0;
    132 
    133 	if (com_is_console(iot, iobase, &ioh) == 0 &&
    134 	    bus_space_map(iot, iobase, pxa->pxa_size, 0, &ioh)) {
    135 		printf(": can't map registers\n");
    136 		return;
    137 	}
    138 	COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
    139 
    140 	com_attach_subr(sc);
    141 
    142 	pxa2x0_intr_establish(pxa->pxa_intr, IPL_SERIAL, comintr, sc);
    143 }
    144