timer_isa.c revision 1.12
1 /* $NetBSD: timer_isa.c,v 1.12 2008/07/05 08:46:25 tsutsui Exp $ */ 2 /* $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $ */ 3 /* NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp */ 4 5 /* 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah Hdr: clock.c 1.18 91/01/21 38 * 39 * @(#)clock.c 8.1 (Berkeley) 6/10/93 40 */ 41 /* 42 * Copyright (c) 1988 University of Utah. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * the Systems Programming Group of the University of Utah Computer 46 * Science Department and Ralph Campbell. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * from: Utah Hdr: clock.c 1.18 91/01/21 77 * 78 * @(#)clock.c 8.1 (Berkeley) 6/10/93 79 */ 80 81 #include <sys/cdefs.h> 82 __KERNEL_RCSID(0, "$NetBSD: timer_isa.c,v 1.12 2008/07/05 08:46:25 tsutsui Exp $"); 83 84 #include <sys/param.h> 85 #include <sys/kernel.h> 86 #include <sys/systm.h> 87 #include <sys/device.h> 88 89 #include <machine/bus.h> 90 91 #include <dev/isa/isareg.h> 92 #include <dev/isa/isavar.h> 93 94 #include <dev/ic/i8253reg.h> 95 96 #include <arc/arc/timervar.h> 97 #include <arc/isa/timer_isavar.h> 98 99 #define TIMER_IOSIZE 4 100 #define TIMER_IRQ 0 101 102 struct timer_isa_softc { 103 device_t sc_dev; 104 105 bus_space_tag_t sc_iot; 106 bus_space_handle_t sc_ioh; 107 }; 108 109 /* Definition of the driver for autoconfig. */ 110 static int timer_isa_match(device_t, cfdata_t, void *); 111 static void timer_isa_attach(device_t, device_t, void *); 112 113 CFATTACH_DECL_NEW(timer_isa, sizeof(struct timer_isa_softc), 114 timer_isa_match, timer_isa_attach, NULL, NULL); 115 116 /* ISA timer access code */ 117 static void timer_isa_init(device_t); 118 119 struct timerfns timerfns_isa = { 120 timer_isa_init 121 }; 122 123 int timer_isa_conf = 0; 124 125 static int 126 timer_isa_match(device_t parent, cfdata_t cf, void *aux) 127 { 128 struct isa_attach_args *ia = aux; 129 bus_space_handle_t ioh; 130 131 if (ia->ia_nio < 1 || 132 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 133 ia->ia_io[0].ir_addr != IO_TIMER1)) 134 return 0; 135 136 if (ia->ia_niomem > 0 && 137 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 138 return 0; 139 140 if (ia->ia_nirq > 0 && 141 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 142 ia->ia_irq[0].ir_irq != TIMER_IRQ)) 143 return 0; 144 145 if (ia->ia_ndrq > 0 && 146 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 147 return 0; 148 149 if (!timer_isa_conf) 150 return 0; 151 152 if (bus_space_map(ia->ia_iot, IO_TIMER1, TIMER_IOSIZE, 0, &ioh)) 153 return 0; 154 155 bus_space_unmap(ia->ia_iot, ioh, TIMER_IOSIZE); 156 157 ia->ia_nio = 1; 158 ia->ia_io[0].ir_addr = IO_TIMER1; 159 ia->ia_io[0].ir_size = TIMER_IOSIZE; 160 161 ia->ia_niomem = 0; 162 ia->ia_nirq = 0; 163 ia->ia_ndrq = 0; 164 165 return 1; 166 } 167 168 static void 169 timer_isa_attach(device_t parent, device_t self, void *aux) 170 { 171 struct timer_isa_softc *sc = device_private(self); 172 struct isa_attach_args *ia = aux; 173 void *ih; 174 175 sc->sc_dev = self; 176 177 aprint_normal("\n"); 178 179 sc->sc_iot = ia->ia_iot; 180 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 181 ia->ia_io[0].ir_size, 0, &sc->sc_ioh)) 182 panic("timer_isa_attach: couldn't map clock I/O space"); 183 184 ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, IST_PULSE, 185 IPL_CLOCK, (int (*)(void *))hardclock, 186 NULL /* clockframe is hardcoded */); 187 if (ih == NULL) 188 aprint_error_dev(self, "can't establish interrupt\n"); 189 190 timerattach(self, &timerfns_isa); 191 } 192 193 static void 194 timer_isa_init(device_t self) 195 { 196 struct timer_isa_softc *sc = device_private(self); 197 198 bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE, 199 TIMER_SEL0 | TIMER_16BIT | TIMER_RATEGEN); 200 bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0, 201 TIMER_DIV(hz) % 256); 202 bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0, 203 TIMER_DIV(hz) / 256); 204 } 205
Indexes created Wed Sep 24 22:09:59 GMT 2025