1 /* $NetBSD: i82072.c,v 1.13 2014/03/16 05:20:25 dholland 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 1.13 2014/03/16 05:20:25 dholland 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 .d_open = fdopen, 53 .d_close = nullclose, 54 .d_strategy = fdstrategy, 55 .d_ioctl = noioctl, 56 .d_dump = nodump, 57 .d_psize = nosize, 58 .d_flag = D_DISK 59 }; 60 61 const struct cdevsw fd_cdevsw = { 62 .d_open = fdopen, 63 .d_close = nullclose, 64 .d_read = noread, 65 .d_write = nowrite, 66 .d_ioctl = noioctl, 67 .d_stop = nostop, 68 .d_tty = notty, 69 .d_poll = nopoll, 70 .d_mmap = nommap, 71 .d_kqfilter = nokqfilter, 72 .d_flag = D_DISK 73 }; 74 75 #define I82072_STATUS 0x000003 76 #define I82072_DATA 0x000007 77 #define I82072_TC 0x800003 78 79 struct fd_softc { 80 device_t dev; 81 struct evcnt fd_intrcnt; 82 bus_space_tag_t fd_bst; 83 bus_space_handle_t fd_bsh; 84 int unit; 85 }; 86 87 static int fd_match (device_t, cfdata_t, void *); 88 static void fd_attach (device_t, device_t, void *); 89 static void fd_reset (struct fd_softc *); 90 91 CFATTACH_DECL_NEW(fd, sizeof(struct fd_softc), 92 fd_match, fd_attach, NULL, NULL); 93 94 static int fd_intr (void *); 95 96 int 97 fd_match(device_t parent, cfdata_t cf, void *aux) 98 { 99 return 1; 100 } 101 102 void 103 fd_attach(device_t parent, device_t self, void *aux) 104 { 105 struct fd_softc *sc = device_private(self); 106 struct confargs *ca = aux; 107 108 sc->fd_bst = ca->ca_bustag; 109 if (bus_space_map(ca->ca_bustag, ca->ca_addr, 110 0x1000000, 111 BUS_SPACE_MAP_LINEAR, 112 &sc->fd_bsh) != 0) { 113 printf("%s: cannot map registers\n", device_xname(self)); 114 return; 115 } 116 evcnt_attach_dynamic(&sc->fd_intrcnt, EVCNT_TYPE_INTR, NULL, 117 device_xname(self), "intr"); 118 119 bus_intr_establish(sc->fd_bst, SYS_INTR_FDC, 0, 0, fd_intr, sc); 120 121 fd_reset(sc); 122 printf(": not fully implemented\n"); 123 } 124 125 void 126 fd_reset(struct fd_softc *sc) 127 { 128 /* This clears any pending interrupts from the i82072 FDC */ 129 bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_STATUS, 0x80); 130 DELAY(1000); 131 bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_TC, 0x01); 132 DELAY(1000); 133 } 134 135 int 136 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 137 { 138 return (EBADF); 139 } 140 141 void 142 fdstrategy(struct buf *bp) 143 { 144 panic("fdstrategy"); 145 } 146 147 static int 148 fd_intr(void *arg) 149 { 150 struct fd_softc *sc = arg; 151 152 sc->fd_intrcnt.ev_count++; 153 fd_reset(sc); 154 return 0; 155 } 156