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flash.c revision 1.2 
      1 /*	$NetBSD: flash.c,v 1.2 2007/10/17 19:54:19 garbled Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Lennart Augustsson (lennart (at) augustsson.net) at Sandburst Corp.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: flash.c,v 1.2 2007/10/17 19:54:19 garbled Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/device.h>
     44 #include <sys/systm.h>
     45 
     46 #include <machine/bus.h>
     47 #include <arch/evbppc/pmppc/dev/mainbus.h>
     48 
     49 struct flash_softc {
     50 	struct device sc_dev;
     51 	bus_space_tag_t sc_tag;
     52 	bus_space_handle_t sc_handle;
     53 	u_int32_t sc_addr;
     54 	u_int32_t sc_size;
     55 	u_int32_t sc_width;
     56 };
     57 
     58 static int	flash_match(struct device *, struct cfdata *, void *);
     59 static void	flash_attach(struct device *, struct device *, void *);
     60 
     61 CFATTACH_DECL(flash, sizeof(struct flash_softc),
     62     flash_match, flash_attach, NULL, NULL);
     63 
     64 int
     65 flash_match(struct device *parent, struct cfdata *cf, void *aux)
     66 {
     67 	struct mainbus_attach_args *maa = aux;
     68 
     69 	return (strcmp(maa->mb_name, "flash") == 0);
     70 }
     71 
     72 void
     73 flash_attach(struct device *parent, struct device *self, void *aux)
     74 {
     75 	struct mainbus_attach_args *maa = aux;
     76 	struct flash_softc *sc = (struct flash_softc *)self;
     77 
     78 	sc->sc_tag = maa->mb_bt;
     79 	sc->sc_addr = maa->mb_addr;
     80 	sc->sc_size = maa->u.mb_flash.size / 8; /* bytes */
     81 	sc->sc_width = maa->u.mb_flash.width;
     82 
     83 	printf(": %d Mbyte, %d bits wide\n", sc->sc_size / (1024*1024),
     84 	       sc->sc_width);
     85 #if 0
     86 	/* The extend map doesn't cover this area. */
     87 	if (bus_space_map(sc->sc_tag, sc->sc_addr, sc->sc_size, 0,
     88 			  &sc->sc_handle)) {
     89 		printf("%s: can't map i/o space\n", self->dv_xname);
     90 		return;
     91 	}
     92 #endif
     93 
     94 	printf("%s: driver not implemented\n", self->dv_xname);
     95 }
     96