Annotation of sys/arch/sparc64/dev/rtc.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rtc.c,v 1.3 2007/04/24 18:30:45 kettenis Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1992, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: * Copyright (c) 1994 Gordon W. Ross
! 7: * Copyright (c) 1993 Adam Glass
! 8: * Copyright (c) 1996 Paul Kranenburg
! 9: * Copyright (c) 1996
! 10: * The President and Fellows of Harvard College. All rights reserved.
! 11: *
! 12: * This software was developed by the Computer Systems Engineering group
! 13: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 14: * contributed to Berkeley.
! 15: *
! 16: * All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by Harvard University.
! 19: * This product includes software developed by the University of
! 20: * California, Lawrence Berkeley Laboratory.
! 21: *
! 22: * Redistribution and use in source and binary forms, with or without
! 23: * modification, are permitted provided that the following conditions
! 24: * are met:
! 25: *
! 26: * 1. Redistributions of source code must retain the above copyright
! 27: * notice, this list of conditions and the following disclaimer.
! 28: * 2. Redistributions in binary form must reproduce the above copyright
! 29: * notice, this list of conditions and the following disclaimer in the
! 30: * documentation and/or other materials provided with the distribution.
! 31: * 3. All advertising materials mentioning features or use of this software
! 32: * must display the following acknowledgement:
! 33: * This product includes software developed by the University of
! 34: * California, Berkeley and its contributors.
! 35: * This product includes software developed by Paul Kranenburg.
! 36: * This product includes software developed by Harvard University.
! 37: * 4. Neither the name of the University nor the names of its contributors
! 38: * may be used to endorse or promote products derived from this software
! 39: * without specific prior written permission.
! 40: *
! 41: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 44: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 51: * SUCH DAMAGE.
! 52: *
! 53: */
! 54:
! 55: /*
! 56: * Driver for rtc device on Blade 1000, Fire V210, etc.
! 57: */
! 58:
! 59: #include <sys/param.h>
! 60: #include <sys/kernel.h>
! 61: #include <sys/device.h>
! 62: #include <sys/malloc.h>
! 63: #include <sys/proc.h>
! 64: #include <sys/signalvar.h>
! 65: #include <sys/systm.h>
! 66:
! 67: #include <machine/bus.h>
! 68: #include <machine/autoconf.h>
! 69:
! 70: #include <dev/clock_subr.h>
! 71: #include <dev/ic/mc146818reg.h>
! 72:
! 73: #include <sparc64/dev/ebusreg.h>
! 74: #include <sparc64/dev/ebusvar.h>
! 75:
! 76: extern todr_chip_handle_t todr_handle;
! 77:
! 78: struct rtc_softc {
! 79: struct device sc_dv;
! 80: bus_space_tag_t sc_iot;
! 81: bus_space_handle_t sc_ioh;
! 82: struct intrhand *sc_ih;
! 83: };
! 84:
! 85: int rtc_match(struct device *, void *, void *);
! 86: void rtc_attach(struct device *, struct device *, void *);
! 87:
! 88: struct cfattach rtc_ca = {
! 89: sizeof(struct rtc_softc), rtc_match, rtc_attach
! 90: };
! 91:
! 92: struct cfdriver rtc_cd = {
! 93: NULL, "rtc", DV_DULL
! 94: };
! 95:
! 96: int rtc_intr(void *arg);
! 97:
! 98: u_int8_t rtc_read_reg(struct rtc_softc *, bus_size_t);
! 99: void rtc_write_reg(struct rtc_softc *sc, bus_size_t, u_int8_t);
! 100:
! 101: int rtc_gettime(todr_chip_handle_t, struct timeval *);
! 102: int rtc_settime(todr_chip_handle_t, struct timeval *);
! 103: int rtc_getcal(todr_chip_handle_t, int *);
! 104: int rtc_setcal(todr_chip_handle_t, int);
! 105:
! 106: int
! 107: rtc_match(struct device *parent, void *cf, void *aux)
! 108: {
! 109: struct ebus_attach_args *ea = aux;
! 110:
! 111: if (strcmp("rtc", ea->ea_name) == 0)
! 112: return (1);
! 113: return (0);
! 114: }
! 115:
! 116: void
! 117: rtc_attach(struct device *parent, struct device *self, void *aux)
! 118: {
! 119: struct rtc_softc *sc = (void *)self;
! 120: struct ebus_attach_args *ea = aux;
! 121: todr_chip_handle_t handle;
! 122: char *model;
! 123:
! 124: if (ebus_bus_map(ea->ea_iotag, 0,
! 125: EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
! 126: ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
! 127: sc->sc_iot = ea->ea_iotag;
! 128: } else if (ebus_bus_map(ea->ea_memtag, 0,
! 129: EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
! 130: ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
! 131: sc->sc_iot = ea->ea_memtag;
! 132: } else {
! 133: printf("%s: can't map register\n", self->dv_xname);
! 134: return;
! 135: }
! 136:
! 137: model = getpropstring(ea->ea_node, "model");
! 138: #ifdef DIAGNOSTIC
! 139: if (model == NULL)
! 140: panic("rtc_attach: no model property");
! 141: #endif
! 142: printf(": %s\n", model);
! 143:
! 144: /* Setup our todr_handle */
! 145: handle = malloc(sizeof(struct todr_chip_handle), M_DEVBUF, M_NOWAIT);
! 146: if (handle == NULL)
! 147: panic("couldn't allocate todr_handle");
! 148: handle->cookie = sc;
! 149: handle->todr_gettime = rtc_gettime;
! 150: handle->todr_settime = rtc_settime;
! 151: handle->todr_getcal = rtc_getcal;
! 152: handle->todr_setcal = rtc_setcal;
! 153:
! 154: handle->bus_cookie = NULL;
! 155: handle->todr_setwen = NULL;
! 156: todr_handle = handle;
! 157:
! 158: /*
! 159: * Turn interrupts off, just in case. (Although they shouldn't
! 160: * be wired to an interrupt controller on sparcs).
! 161: */
! 162: rtc_write_reg(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
! 163:
! 164: /*
! 165: * On ds1287 models (which really are ns87317 chips), the
! 166: * interrupt is wired to the powerbutton.
! 167: */
! 168: if(strcmp(model, "ds1287") == 0 && ea->ea_nintrs > 0) {
! 169: sc->sc_ih = bus_intr_establish(sc->sc_iot, ea->ea_intrs[0],
! 170: IPL_BIO, 0, rtc_intr, sc, self->dv_xname);
! 171: if (sc->sc_ih == NULL) {
! 172: printf("%s: can't establush interrupt\n",
! 173: self->dv_xname);
! 174: }
! 175: }
! 176: }
! 177:
! 178: int
! 179: rtc_intr(void *arg)
! 180: {
! 181: extern int kbd_reset;
! 182:
! 183: if (kbd_reset == 1) {
! 184: kbd_reset = 0;
! 185: psignal(initproc, SIGUSR2);
! 186: }
! 187: return (1);
! 188: }
! 189:
! 190: /*
! 191: * Register access is indirect, through an address and data port.
! 192: */
! 193:
! 194: #define RTC_ADDR 0
! 195: #define RTC_DATA 1
! 196:
! 197: u_int8_t
! 198: rtc_read_reg(struct rtc_softc *sc, bus_size_t reg)
! 199: {
! 200: bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR, reg);
! 201: return (bus_space_read_1(sc->sc_iot, sc->sc_ioh, RTC_DATA));
! 202: }
! 203:
! 204: void
! 205: rtc_write_reg(struct rtc_softc *sc, bus_size_t reg, u_int8_t val)
! 206: {
! 207: bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR, reg);
! 208: bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_DATA, val);
! 209: }
! 210:
! 211: /*
! 212: * RTC todr routines.
! 213: */
! 214:
! 215: /*
! 216: * Get time-of-day and convert to a `struct timeval'
! 217: * Return 0 on success; an error number otherwise.
! 218: */
! 219: int
! 220: rtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
! 221: {
! 222: struct rtc_softc *sc = handle->cookie;
! 223: struct clock_ymdhms dt;
! 224: int year;
! 225: u_int8_t csr;
! 226:
! 227: /* Stop updates. */
! 228: csr = rtc_read_reg(sc, MC_REGB);
! 229: csr |= MC_REGB_SET;
! 230: rtc_write_reg(sc, MC_REGB, csr);
! 231:
! 232: /* Read time */
! 233: dt.dt_sec = rtc_read_reg(sc, MC_SEC);
! 234: dt.dt_min = rtc_read_reg(sc, MC_MIN);
! 235: dt.dt_hour = rtc_read_reg(sc, MC_HOUR);
! 236: dt.dt_day = rtc_read_reg(sc, MC_DOM);
! 237: dt.dt_wday = rtc_read_reg(sc, MC_DOW);
! 238: dt.dt_mon = rtc_read_reg(sc, MC_MONTH);
! 239: year = rtc_read_reg(sc, MC_YEAR);
! 240:
! 241: if ((year += 1900) < POSIX_BASE_YEAR)
! 242: year += 100;
! 243:
! 244: dt.dt_year = year;
! 245:
! 246: /* time wears on */
! 247: csr = rtc_read_reg(sc, MC_REGB);
! 248: csr &= ~MC_REGB_SET;
! 249: rtc_write_reg(sc, MC_REGB, csr);
! 250:
! 251: /* simple sanity checks */
! 252: if (dt.dt_mon > 12 || dt.dt_day > 31 ||
! 253: dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60)
! 254: return (1);
! 255:
! 256: tv->tv_sec = clock_ymdhms_to_secs(&dt);
! 257: tv->tv_usec = 0;
! 258: return (0);
! 259: }
! 260:
! 261: /*
! 262: * Set the time-of-day clock based on the value of the `struct timeval' arg.
! 263: * Return 0 on success; an error number otherwise.
! 264: */
! 265: int
! 266: rtc_settime(todr_chip_handle_t handle, struct timeval *tv)
! 267: {
! 268: struct rtc_softc *sc = handle->cookie;
! 269: struct clock_ymdhms dt;
! 270: u_int8_t csr;
! 271: int year;
! 272:
! 273: /* Note: we ignore `tv_usec' */
! 274: clock_secs_to_ymdhms(tv->tv_sec, &dt);
! 275:
! 276: year = dt.dt_year % 100;
! 277:
! 278: /* enable write */
! 279: csr = rtc_read_reg(sc, MC_REGB);
! 280: csr |= MC_REGB_SET;
! 281: rtc_write_reg(sc, MC_REGB, csr);
! 282:
! 283: rtc_write_reg(sc, MC_SEC, dt.dt_sec);
! 284: rtc_write_reg(sc, MC_MIN, dt.dt_min);
! 285: rtc_write_reg(sc, MC_HOUR, dt.dt_hour);
! 286: rtc_write_reg(sc, MC_DOW, dt.dt_wday);
! 287: rtc_write_reg(sc, MC_DOM, dt.dt_day);
! 288: rtc_write_reg(sc, MC_MONTH, dt.dt_mon);
! 289: rtc_write_reg(sc, MC_YEAR, year);
! 290:
! 291: /* load them up */
! 292: csr = rtc_read_reg(sc, MC_REGB);
! 293: csr &= ~MC_REGB_SET;
! 294: rtc_write_reg(sc, MC_REGB, csr);
! 295: return (0);
! 296: }
! 297:
! 298: int
! 299: rtc_getcal(todr_chip_handle_t handle, int *vp)
! 300: {
! 301: return (EOPNOTSUPP);
! 302: }
! 303:
! 304: int
! 305: rtc_setcal(todr_chip_handle_t handle, int v)
! 306: {
! 307: return (EOPNOTSUPP);
! 308: }
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