1 /* $NetBSD: drbbc.c,v 1.16 2006/09/07 20:59:47 mhitch Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ignatios Souvatzis. 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: drbbc.c,v 1.16 2006/09/07 20:59:47 mhitch Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 #include <sys/systm.h> 46 47 #include <uvm/uvm_extern.h> 48 49 #if 0 50 #include <machine/psl.h> 51 #endif 52 #include <machine/cpu.h> 53 #include <amiga/amiga/device.h> 54 #include <amiga/amiga/custom.h> 55 #include <amiga/amiga/cia.h> 56 #include <amiga/amiga/drcustom.h> 57 #include <amiga/dev/rtc.h> 58 59 #include <dev/clock_subr.h> 60 #include <dev/ic/ds.h> 61 62 int draco_ds_read_bit(void *); 63 void draco_ds_write_bit(void *, int); 64 void draco_ds_reset(void *); 65 66 void drbbc_attach(struct device *, struct device *, void *); 67 int drbbc_match(struct device *, struct cfdata *, void *); 68 69 int dracougettod(todr_chip_handle_t, volatile struct timeval *); 70 int dracousettod(todr_chip_handle_t, volatile struct timeval *); 71 72 static struct todr_chip_handle dracotodr; 73 struct drbbc_softc { 74 struct device sc_dev; 75 struct ds_handle sc_dsh; 76 }; 77 78 CFATTACH_DECL(drbbc, sizeof(struct drbbc_softc), 79 drbbc_match, drbbc_attach, NULL, NULL); 80 81 struct drbbc_softc *drbbc_sc; 82 83 int 84 drbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp) 85 { 86 static int drbbc_matched = 0; 87 88 /* Allow only one instance. */ 89 if (!is_draco() || !matchname(auxp, "drbbc") || drbbc_matched) 90 return (0); 91 92 drbbc_matched = 1; 93 return (1); 94 } 95 96 void 97 drbbc_attach(struct device *pdp, struct device *dp, void *auxp) 98 { 99 int i; 100 struct drbbc_softc *sc; 101 u_int8_t rombuf[8]; 102 103 sc = (struct drbbc_softc *)dp; 104 105 sc->sc_dsh.ds_read_bit = draco_ds_read_bit; 106 sc->sc_dsh.ds_write_bit = draco_ds_write_bit; 107 sc->sc_dsh.ds_reset = draco_ds_reset; 108 sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE); 109 110 sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle); 111 112 ds_write_byte(&sc->sc_dsh, DS_ROM_READ); 113 for (i=0; i<8; ++i) 114 rombuf[i] = ds_read_byte(&sc->sc_dsh); 115 116 hostid = (rombuf[3] << 24) + (rombuf[2] << 16) + 117 (rombuf[1] << 8) + rombuf[7]; 118 119 printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n", 120 rombuf[7], rombuf[6], rombuf[5], rombuf[4], 121 rombuf[3], rombuf[2], rombuf[1], rombuf[0], 122 hostid); 123 124 drbbc_sc = sc; 125 dracotodr.cookie = sc; 126 dracotodr.todr_gettime = dracougettod; 127 dracotodr.todr_settime = dracousettod; 128 todr_attach(&dracotodr); 129 } 130 131 int 132 draco_ds_read_bit(void *p) 133 { 134 struct drioct *draco_ioctl; 135 136 draco_ioctl = p; 137 138 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 139 140 draco_ioctl->io_clockw1 = 0; 141 142 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 143 144 return (draco_ioctl->io_status & DRSTAT_CLKDAT); 145 } 146 147 void 148 draco_ds_write_bit(void *p, int b) 149 { 150 struct drioct *draco_ioctl; 151 152 draco_ioctl = p; 153 154 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 155 156 if (b) 157 draco_ioctl->io_clockw1 = 0; 158 else 159 draco_ioctl->io_clockw0 = 0; 160 } 161 162 void 163 draco_ds_reset(void *p) 164 { 165 struct drioct *draco_ioctl; 166 167 draco_ioctl = p; 168 169 draco_ioctl->io_clockrst = 0; 170 } 171 172 int 173 dracougettod(todr_chip_handle_t h, volatile struct timeval *tvp) 174 { 175 u_int32_t clkbuf; 176 u_int32_t usecs; 177 178 drbbc_sc->sc_dsh.ds_reset(drbbc_sc->sc_dsh.ds_hw_handle); 179 180 ds_write_byte(&drbbc_sc->sc_dsh, DS_ROM_SKIP); 181 182 ds_write_byte(&drbbc_sc->sc_dsh, DS_MEM_READ_MEMORY); 183 /* address of seconds/256: */ 184 ds_write_byte(&drbbc_sc->sc_dsh, 0x02); 185 ds_write_byte(&drbbc_sc->sc_dsh, 0x02); 186 187 usecs = (ds_read_byte(&drbbc_sc->sc_dsh) * 1000000) / 256; 188 clkbuf = ds_read_byte(&drbbc_sc->sc_dsh) 189 + (ds_read_byte(&drbbc_sc->sc_dsh)<<8) 190 + (ds_read_byte(&drbbc_sc->sc_dsh)<<16) 191 + (ds_read_byte(&drbbc_sc->sc_dsh)<<24); 192 193 /* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */ 194 195 clkbuf += (8*365 + 2) * 86400; 196 197 tvp->tv_sec = clkbuf; 198 tvp->tv_usec = usecs; 199 200 return (0); 201 } 202 203 int 204 dracousettod(todr_chip_handle_t h, volatile struct timeval *tvp) 205 { 206 return (ENXIO); 207 } 208