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      1 /*	$NetBSD: com_obio.c,v 1.1 2019/02/14 21:47:52 macallan Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas <matt (at) 3am-software.com>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: com_obio.c,v 1.1 2019/02/14 21:47:52 macallan Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 #include <sys/termios.h>
     39 
     40 #include <sys/bus.h>
     41 
     42 #include <arm/xscale/i80321var.h>
     43 
     44 #include <evbarm/iyonix/obiovar.h>
     45 
     46 #include <dev/ic/comreg.h>
     47 #include <dev/ic/comvar.h>
     48 
     49 struct com_obio_softc {
     50 	struct com_softc sc_com;
     51 
     52 	void *sc_ih;
     53 };
     54 
     55 int	com_obio_match(device_t, cfdata_t , void *);
     56 void	com_obio_attach(device_t, device_t, void *);
     57 
     58 CFATTACH_DECL_NEW(com_obio, sizeof(struct com_obio_softc),
     59     com_obio_match, com_obio_attach, NULL, NULL);
     60 
     61 int
     62 com_obio_match(device_t parent, cfdata_t cf, void *aux)
     63 {
     64 	/* We take it on faith that the device is there. */
     65 	return (1);
     66 }
     67 
     68 void
     69 com_obio_attach(device_t parent, device_t self, void *aux)
     70 {
     71 	struct obio_attach_args *oba = aux;
     72 	struct com_obio_softc *osc = device_private(self);
     73 	struct com_softc *sc = &osc->sc_com;
     74 	bus_space_handle_t ioh;
     75 	int error;
     76 
     77 	sc->sc_dev = self;
     78 	sc->sc_frequency = COM_FREQ;
     79 	sc->sc_hwflags = COM_HW_NO_TXPRELOAD;
     80 	error = bus_space_map(oba->oba_st, oba->oba_addr, 8, 0, &ioh);
     81 	com_init_regs(&sc->sc_regs, oba->oba_st, ioh, oba->oba_addr);
     82 
     83 	if (error) {
     84 		aprint_error(": failed to map registers: %d\n", error);
     85 		return;
     86 	}
     87 
     88 	com_attach_subr(sc);
     89 
     90 	osc->sc_ih = i80321_intr_establish(oba->oba_irq, IPL_SERIAL,
     91 	    comintr, sc);
     92 	if (osc->sc_ih == NULL)
     93 		aprint_error_dev(self,
     94 		    "unable to establish interrupt at irq %d\n", oba->oba_irq);
     95 }
     96