1 /* $NetBSD: i82072.c,v 1.11 2009/03/14 15:36:10 dsl Exp $ */ 2 /*- 3 * Copyright (c) 2000 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Wayne Knowles 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: i82072.c,v 1.11 2009/03/14 15:36:10 dsl Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/syslog.h> 38 #include <sys/socket.h> 39 #include <sys/device.h> 40 #include <sys/conf.h> 41 #include <sys/event.h> 42 43 #include <machine/cpu.h> 44 #include <machine/autoconf.h> 45 #include <machine/mainboard.h> 46 #include <machine/bus.h> 47 48 dev_type_open(fdopen); 49 dev_type_strategy(fdstrategy); 50 51 const struct bdevsw fd_bdevsw = { 52 fdopen, nullclose, fdstrategy, noioctl, nodump, nosize, D_DISK 53 }; 54 55 const struct cdevsw fd_cdevsw = { 56 fdopen, nullclose, noread, nowrite, noioctl, 57 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 58 }; 59 60 #define I82072_STATUS 0x000003 61 #define I82072_DATA 0x000007 62 #define I82072_TC 0x800003 63 64 struct fd_softc { 65 struct device dev; 66 struct evcnt fd_intrcnt; 67 bus_space_tag_t fd_bst; 68 bus_space_handle_t fd_bsh; 69 int unit; 70 }; 71 72 static int fd_match (struct device *, struct cfdata *, void *); 73 static void fd_attach (struct device *, struct device *, void *); 74 static void fd_reset (struct fd_softc *); 75 76 CFATTACH_DECL(fd, sizeof(struct fd_softc), 77 fd_match, fd_attach, NULL, NULL); 78 79 static int fd_intr (void *); 80 81 int 82 fd_match(struct device *parent, struct cfdata *cf, void *aux) 83 { 84 return 1; 85 } 86 87 void 88 fd_attach(struct device *parent, struct device *self, void *aux) 89 { 90 struct fd_softc *sc = (void *)self; 91 struct confargs *ca = aux; 92 93 sc->fd_bst = ca->ca_bustag; 94 if (bus_space_map(ca->ca_bustag, ca->ca_addr, 95 0x1000000, 96 BUS_SPACE_MAP_LINEAR, 97 &sc->fd_bsh) != 0) { 98 printf("%s: cannot map registers\n", self->dv_xname); 99 return; 100 } 101 evcnt_attach_dynamic(&sc->fd_intrcnt, EVCNT_TYPE_INTR, NULL, 102 self->dv_xname, "intr"); 103 104 bus_intr_establish(sc->fd_bst, SYS_INTR_FDC, 0, 0, fd_intr, sc); 105 106 fd_reset(sc); 107 printf(": not fully implemented\n"); 108 } 109 110 void 111 fd_reset(struct fd_softc *sc) 112 { 113 /* This clears any pending interrupts from the i82072 FDC */ 114 bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_STATUS, 0x80); 115 DELAY(1000); 116 bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_TC, 0x01); 117 DELAY(1000); 118 } 119 120 int 121 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 122 { 123 return (EBADF); 124 } 125 126 void 127 fdstrategy(struct buf *bp) 128 { 129 panic("fdstrategy"); 130 } 131 132 static int 133 fd_intr(void *arg) 134 { 135 struct fd_softc *sc = arg; 136 137 sc->fd_intrcnt.ev_count++; 138 fd_reset(sc); 139 return 0; 140 } 141