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gencp_xsurf.c revision 1.2 
      1 /*      $NetBSD: gencp_xsurf.c,v 1.2 2012/10/27 17:17:26 chs Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Radoslaw Kujawa.
      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 /* Clockports on top of X-Surf. */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 #include <sys/systm.h>
     37 #include <sys/types.h>
     38 #include <sys/device.h>
     39 #include <sys/bus.h>
     40 #include <sys/conf.h>
     41 #include <sys/kmem.h>
     42 
     43 #include <machine/cpu.h>
     44 
     45 #include <amiga/amiga/device.h>
     46 
     47 #include <amiga/dev/zbusvar.h>
     48 #include <amiga/dev/xsurfvar.h>
     49 
     50 #include <amiga/clockport/clockportvar.h>
     51 
     52 static int	gencp_xsurf_match(device_t, cfdata_t, void *);
     53 static void	gencp_xsurf_attach(device_t, device_t, void *);
     54 
     55 CFATTACH_DECL_NEW(gencp_xsurf, sizeof(struct gencp_softc),
     56     gencp_xsurf_match, gencp_xsurf_attach, NULL, NULL);
     57 
     58 static int
     59 gencp_xsurf_match(device_t parent, cfdata_t cf, void *aux)
     60 {
     61 	struct xsurfbus_attach_args *xsb_aa;
     62 	static int attach_count = 0;
     63 
     64 	xsb_aa = aux;
     65 
     66 	if (strcmp(xsb_aa->xaa_name, "gencp_xsurf") != 0)
     67 		return 0;
     68 
     69 	/* No X-Surf with more than 2 clockports exists. */
     70 	if (attach_count >= 2)
     71 		return 0;
     72 
     73 	attach_count++;
     74 
     75 	return 1;
     76 }
     77 
     78 static void
     79 gencp_xsurf_attach(device_t parent, device_t self, void *aux)
     80 {
     81 	struct gencp_softc *sc;
     82 	struct bus_space_tag cpb_bst;
     83 	struct clockportbus_attach_args cpb_aa;
     84 	struct xsurfbus_attach_args *xsb_aa;
     85 
     86 	xsb_aa = aux;
     87 	sc = device_private(self);
     88 	sc->sc_dev = self;
     89 	sc->cpb_aa = &cpb_aa;
     90 
     91 	/* Set the address and bus access methods. */
     92 	cpb_bst.base = xsb_aa->xaa_base;
     93 	cpb_bst.absm = &amiga_bus_stride_4;
     94 
     95 	sc->cpb_aa->cp_iot = &cpb_bst;
     96 
     97 	gencp_attach(sc);
     98 }
     99