1 /* $NetBSD: tx39clock.c,v 1.13 2002/10/02 05:26:50 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999-2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 "opt_tx39clock_debug.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 44 #include <dev/clock_subr.h> 45 46 #include <machine/bus.h> 47 #include <machine/sysconf.h> 48 49 #include <hpcmips/tx/tx39var.h> 50 #include <hpcmips/tx/tx39icureg.h> 51 #include <hpcmips/tx/tx39clockvar.h> 52 #include <hpcmips/tx/tx39clockreg.h> 53 #include <hpcmips/tx/tx39timerreg.h> 54 55 #ifdef TX39CLOCK_DEBUG 56 #define DPRINTF_ENABLE 57 #define DPRINTF_DEBUG tx39clock_debug 58 #endif 59 #include <machine/debug.h> 60 61 #define ISSETPRINT(r, m) \ 62 dbg_bitmask_print(r, TX39_CLOCK_EN ## m ## CLK, #m) 63 64 void tx39clock_init(struct device *); 65 void tx39clock_get(struct device *, time_t, struct clock_ymdhms *); 66 void tx39clock_set(struct device *, struct clock_ymdhms *); 67 68 struct platform_clock tx39_clock = { 69 #define CLOCK_RATE 100 70 CLOCK_RATE, tx39clock_init, tx39clock_get, tx39clock_set, 71 }; 72 73 struct txtime { 74 u_int32_t t_hi; 75 u_int32_t t_lo; 76 }; 77 78 struct tx39clock_softc { 79 struct device sc_dev; 80 tx_chipset_tag_t sc_tc; 81 82 int sc_alarm; 83 int sc_enabled; 84 int sc_year; 85 struct clock_ymdhms sc_epoch; 86 }; 87 88 int tx39clock_match(struct device *, struct cfdata *, void *); 89 void tx39clock_attach(struct device *, struct device *, void *); 90 #ifdef TX39CLOCK_DEBUG 91 void tx39clock_dump(tx_chipset_tag_t); 92 #endif 93 94 void tx39clock_cpuspeed(int *, int *); 95 96 void __tx39timer_rtcfreeze(tx_chipset_tag_t); 97 void __tx39timer_rtcreset(tx_chipset_tag_t); 98 __inline__ void __tx39timer_rtcget(struct txtime *); 99 __inline__ time_t __tx39timer_rtc2sec(struct txtime *); 100 101 CFATTACH_DECL(tx39clock, sizeof(struct tx39clock_softc), 102 tx39clock_match, tx39clock_attach, NULL, NULL); 103 104 int 105 tx39clock_match(struct device *parent, struct cfdata *cf, void *aux) 106 { 107 108 return (ATTACH_FIRST); 109 } 110 111 void 112 tx39clock_attach(struct device *parent, struct device *self, void *aux) 113 { 114 struct txsim_attach_args *ta = aux; 115 struct tx39clock_softc *sc = (void*)self; 116 tx_chipset_tag_t tc; 117 txreg_t reg; 118 119 tc = sc->sc_tc = ta->ta_tc; 120 tx_conf_register_clock(tc, self); 121 122 /* Reset timer module */ 123 tx_conf_write(tc, TX39_TIMERCONTROL_REG, 0); 124 125 /* Enable periodic timer */ 126 reg = tx_conf_read(tc, TX39_TIMERCONTROL_REG); 127 reg |= TX39_TIMERCONTROL_ENPERTIMER; 128 tx_conf_write(tc, TX39_TIMERCONTROL_REG, reg); 129 130 sc->sc_enabled = 0; 131 /* 132 * RTC and ALARM 133 * RTCINT ... INTR5 bit 31 (roll over) 134 * ALARMINT ... INTR5 bit 30 135 * PERINT ... INTR5 bit 29 136 */ 137 138 platform_clock_attach(self, &tx39_clock); 139 140 #ifdef TX39CLOCK_DEBUG 141 tx39clock_dump(tc); 142 #endif /* TX39CLOCK_DEBUG */ 143 } 144 145 /* 146 * cpuclock ... CPU clock (Hz) 147 * cpuspeed ... instructions-per-microsecond 148 */ 149 void 150 tx39clock_cpuspeed(int *cpuclock, int *cpuspeed) 151 { 152 struct txtime t0, t1; 153 int elapsed; 154 155 __tx39timer_rtcget(&t0); 156 __asm__ __volatile__(" 157 .set noreorder; 158 li $8, 10000000; 159 1: nop; 160 nop; 161 nop; 162 nop; 163 nop; 164 nop; 165 nop; 166 add $8, $8, -1; 167 bnez $8, 1b; 168 nop; 169 .set reorder; 170 "); 171 __tx39timer_rtcget(&t1); 172 173 elapsed = t1.t_lo - t0.t_lo; 174 175 *cpuclock = (100000000 / elapsed) * TX39_RTCLOCK; 176 *cpuspeed = *cpuclock / 1000000; 177 } 178 179 void 180 __tx39timer_rtcfreeze(tx_chipset_tag_t tc) 181 { 182 txreg_t reg; 183 184 reg = tx_conf_read(tc, TX39_TIMERCONTROL_REG); 185 186 /* Freeze RTC */ 187 reg |= TX39_TIMERCONTROL_FREEZEPRE; /* Upper 8bit */ 188 reg |= TX39_TIMERCONTROL_FREEZERTC; /* Lower 32bit */ 189 190 /* Freeze periodic timer */ 191 reg |= TX39_TIMERCONTROL_FREEZETIMER; 192 reg &= ~TX39_TIMERCONTROL_ENPERTIMER; 193 tx_conf_write(tc, TX39_TIMERCONTROL_REG, reg); 194 } 195 196 __inline__ time_t 197 __tx39timer_rtc2sec(struct txtime *t) 198 { 199 /* This rely on RTC is 32.768kHz */ 200 return ((t->t_lo >> 15) | (t->t_hi << 17)); 201 } 202 203 __inline__ void 204 __tx39timer_rtcget(struct txtime *t) 205 { 206 tx_chipset_tag_t tc; 207 txreg_t reghi, reglo, oreghi, oreglo; 208 int retry; 209 210 tc = tx_conf_get_tag(); 211 212 retry = 10; 213 214 do { 215 oreglo = tx_conf_read(tc, TX39_TIMERRTCLO_REG); 216 reglo = tx_conf_read(tc, TX39_TIMERRTCLO_REG); 217 218 oreghi = tx_conf_read(tc, TX39_TIMERRTCHI_REG); 219 reghi = tx_conf_read(tc, TX39_TIMERRTCHI_REG); 220 } while ((reghi != oreghi || reglo != oreglo) && (--retry > 0)); 221 222 if (retry < 0) { 223 printf("RTC timer read error.\n"); 224 } 225 226 t->t_hi = TX39_TIMERRTCHI(reghi); 227 t->t_lo = reglo; 228 } 229 230 void 231 __tx39timer_rtcreset(tx_chipset_tag_t tc) 232 { 233 txreg_t reg; 234 235 reg = tx_conf_read(tc, TX39_TIMERCONTROL_REG); 236 237 /* Reset counter and stop */ 238 reg |= TX39_TIMERCONTROL_RTCCLR; 239 tx_conf_write(tc, TX39_TIMERCONTROL_REG, reg); 240 241 /* Count again */ 242 reg &= ~TX39_TIMERCONTROL_RTCCLR; 243 tx_conf_write(tc, TX39_TIMERCONTROL_REG, reg); 244 } 245 246 void 247 tx39clock_init(struct device *dev) 248 { 249 struct tx39clock_softc *sc = (void*)dev; 250 tx_chipset_tag_t tc = sc->sc_tc; 251 txreg_t reg; 252 int pcnt; 253 254 /* 255 * Setup periodic timer (interrupting hz times per second.) 256 */ 257 pcnt = TX39_TIMERCLK / CLOCK_RATE - 1; 258 reg = tx_conf_read(tc, TX39_TIMERPERIODIC_REG); 259 TX39_TIMERPERIODIC_PERVAL_CLR(reg); 260 reg = TX39_TIMERPERIODIC_PERVAL_SET(reg, pcnt); 261 tx_conf_write(tc, TX39_TIMERPERIODIC_REG, reg); 262 263 /* 264 * Enable periodic timer 265 */ 266 reg = tx_conf_read(tc, TX39_INTRENABLE6_REG); 267 reg |= TX39_INTRPRI13_TIMER_PERIODIC_BIT; 268 tx_conf_write(tc, TX39_INTRENABLE6_REG, reg); 269 } 270 271 void 272 tx39clock_get(struct device *dev, time_t base, struct clock_ymdhms *t) 273 { 274 struct tx39clock_softc *sc = (void *)dev; 275 struct clock_ymdhms dt; 276 struct txtime tt; 277 time_t sec; 278 279 __tx39timer_rtcget(&tt); 280 sec = __tx39timer_rtc2sec(&tt); 281 282 if (!sc->sc_enabled) { 283 DPRINTF(("bootstrap: %d sec from previous reboot\n", 284 (int)sec)); 285 286 sc->sc_enabled = 1; 287 base += sec; 288 } else { 289 dt.dt_year = sc->sc_year; 290 dt.dt_mon = sc->sc_epoch.dt_mon; 291 dt.dt_day = sc->sc_epoch.dt_day; 292 dt.dt_hour = sc->sc_epoch.dt_hour; 293 dt.dt_min = sc->sc_epoch.dt_min; 294 dt.dt_sec = sc->sc_epoch.dt_sec; 295 dt.dt_wday = sc->sc_epoch.dt_wday; 296 base = sec + clock_ymdhms_to_secs(&dt); 297 } 298 299 clock_secs_to_ymdhms(base, &dt); 300 301 t->dt_year = dt.dt_year % 100; 302 t->dt_mon = dt.dt_mon; 303 t->dt_day = dt.dt_day; 304 t->dt_hour = dt.dt_hour; 305 t->dt_min = dt.dt_min; 306 t->dt_sec = dt.dt_sec; 307 t->dt_wday = dt.dt_wday; 308 309 sc->sc_year = dt.dt_year; 310 } 311 312 void 313 tx39clock_set(struct device *dev, struct clock_ymdhms *dt) 314 { 315 struct tx39clock_softc *sc = (void *)dev; 316 317 if (sc->sc_enabled) { 318 sc->sc_epoch = *dt; 319 } 320 } 321 322 int 323 tx39clock_alarm_set(tx_chipset_tag_t tc, int msec) 324 { 325 struct tx39clock_softc *sc = tc->tc_clockt; 326 327 sc->sc_alarm = TX39_MSEC2RTC(msec); 328 tx39clock_alarm_refill(tc); 329 330 return (0); 331 } 332 333 void 334 tx39clock_alarm_refill(tx_chipset_tag_t tc) 335 { 336 struct tx39clock_softc *sc = tc->tc_clockt; 337 struct txtime t; 338 u_int64_t time; 339 340 __tx39timer_rtcget(&t); 341 342 time = ((u_int64_t)t.t_hi << 32) | (u_int64_t)t.t_lo; 343 time += (u_int64_t)sc->sc_alarm; 344 345 t.t_hi = (u_int32_t)((time >> 32) & TX39_TIMERALARMHI_MASK); 346 t.t_lo = (u_int32_t)(time & 0xffffffff); 347 348 tx_conf_write(tc, TX39_TIMERALARMHI_REG, t.t_hi); 349 tx_conf_write(tc, TX39_TIMERALARMLO_REG, t.t_lo); 350 } 351 352 #ifdef TX39CLOCK_DEBUG 353 void 354 tx39clock_dump(tx_chipset_tag_t tc) 355 { 356 txreg_t reg; 357 358 reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG); 359 360 printf(" "); 361 ISSETPRINT(reg, CHIM); 362 #ifdef TX391X 363 ISSETPRINT(reg, VID); 364 ISSETPRINT(reg, MBUS); 365 #endif /* TX391X */ 366 #ifdef TX392X 367 ISSETPRINT(reg, IRDA); 368 #endif /* TX392X */ 369 ISSETPRINT(reg, SPI); 370 ISSETPRINT(reg, TIMER); 371 ISSETPRINT(reg, FASTTIMER); 372 #ifdef TX392X 373 ISSETPRINT(reg, C48MOUT); 374 #endif /* TX392X */ 375 ISSETPRINT(reg, SIBM); 376 ISSETPRINT(reg, CSER); 377 ISSETPRINT(reg, IR); 378 ISSETPRINT(reg, UARTA); 379 ISSETPRINT(reg, UARTB); 380 printf("\n"); 381 } 382 #endif /* TX39CLOCK_DEBUG */ 383