1 /* $NetBSD: stub_ebus.c,v 1.1 2011/01/26 01:18:50 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code was written by Alessandro Forin and Neil Pittman 8 * at Microsoft Research and contributed to The NetBSD Foundation 9 * by Microsoft Corporation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* Before including this file for "foo" you need to define 34 #define STUBSTRING "foo" 35 #define STUBBANNER "8MB flash memory" -- tell the user what it is 36 #define STUBSTRUCT _Flash -- whatever that struct is defined in emipsreg.h 37 #define STUBMATCH(_f_) (((_f_)->BaseAddressAndTag & FLASHBT_TAG) == PMTTAG_FLASH) 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/proc.h> 43 #include <sys/errno.h> 44 #include <sys/ioctl.h> 45 #include <sys/device.h> 46 #include <sys/conf.h> 47 48 #include <emips/ebus/ebusvar.h> 49 #include <emips/emips/machdep.h> 50 #include <machine/emipsreg.h> 51 52 /* 53 * Device softc 54 */ 55 struct stub_softc { 56 struct device sc_dev; 57 struct STUBSTRUCT *sc_dp; 58 }; 59 60 static int stub_ebus_match (struct device *, struct cfdata *, void *); 61 static void stub_ebus_attach (struct device *, struct device *, void *); 62 63 CFATTACH_DECL(stub_ebus, sizeof (struct stub_softc), 64 stub_ebus_match, stub_ebus_attach, NULL, NULL); 65 66 static int 67 stub_ebus_match(struct device *parent, struct cfdata *match, void *aux) 68 { 69 struct ebus_attach_args *ia = aux; 70 struct STUBSTRUCT *f = (struct STUBSTRUCT *)ia->ia_vaddr; 71 72 if (strcmp(STUBSTRING, ia->ia_name) != 0) 73 return (0); 74 if ((f == NULL) || (! STUBMATCH(f))) 75 return (0); 76 77 return (1); 78 } 79 80 static void 81 stub_ebus_attach(struct device *parent, struct device *self, void *aux) 82 { 83 struct ebus_attach_args *ia =aux; 84 struct stub_softc *sc = (struct stub_softc *)self; 85 86 sc->sc_dp = (struct STUBSTRUCT*)ia->ia_vaddr; 87 88 #if DEBUG 89 printf(" virt=%p", (void*)sc->sc_dp); 90 #endif 91 printf(": %s\n", STUBBANNER); 92 93 } 94 95 /* Required funcs 96 */ 97 static int stubopen(dev_t device, int flags, int fmt, struct lwp *process); 98 static int stubclose(dev_t device, int flags, int fmt, struct lwp *process); 99 100 /* just define the character device handlers because that is all we need */ 101 const struct cdevsw stub_cdevsw = { 102 stubopen, 103 stubclose, 104 noread, 105 nowrite, 106 noioctl, 107 nostop, 108 notty, 109 nopoll, 110 nommap, 111 nokqfilter, 112 }; 113 114 /* 115 * Handle an open request on the device. 116 */ 117 static int 118 stubopen(dev_t device, int flags, int fmt, struct lwp *process) 119 { 120 return 0; /* this always succeeds */ 121 } 122 123 /* 124 * Handle the close request for the device. 125 */ 126 static int 127 stubclose(dev_t device, int flags, int fmt, struct lwp *process) 128 { 129 return 0; /* again this always succeeds */ 130 } 131