Annotation of sys/arch/arm/xscale/pxa2x0.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pxa2x0.c,v 1.11 2005/11/11 23:59:58 deraadt Exp $ */
! 2: /* $NetBSD: pxa2x0.c,v 1.5 2003/12/12 16:42:44 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2002 Genetec Corporation. All rights reserved.
! 6: * Written by Hiroyuki Bessho for Genetec Corporation.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed for the NetBSD Project by
! 19: * Genetec Corporation.
! 20: * 4. The name of Genetec Corporation may not be used to endorse or
! 21: * promote products derived from this software without specific prior
! 22: * written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 26: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 27: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
! 28: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 29: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 30: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 31: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 32: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 33: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 34: * POSSIBILITY OF SUCH DAMAGE.
! 35: *
! 36: *
! 37: * Autoconfiguration support for the Intel PXA2[15]0 application
! 38: * processor. This code is derived from arm/sa11x0/sa11x0.c
! 39: */
! 40:
! 41: /*-
! 42: * Copyright (c) 2001, The NetBSD Foundation, Inc. All rights reserved.
! 43: *
! 44: * This code is derived from software contributed to The NetBSD Foundation
! 45: * by IWAMOTO Toshihiro and Ichiro FUKUHARA.
! 46: *
! 47: * Redistribution and use in source and binary forms, with or without
! 48: * modification, are permitted provided that the following conditions
! 49: * are met:
! 50: * 1. Redistributions of source code must retain the above copyright
! 51: * notice, this list of conditions and the following disclaimer.
! 52: * 2. Redistributions in binary form must reproduce the above copyright
! 53: * notice, this list of conditions and the following disclaimer in the
! 54: * documentation and/or other materials provided with the distribution.
! 55: * 3. All advertising materials mentioning features or use of this software
! 56: * must display the following acknowledgement:
! 57: * This product includes software developed by the NetBSD
! 58: * Foundation, Inc. and its contributors.
! 59: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 60: * contributors may be used to endorse or promote products derived
! 61: * from this software without specific prior written permission.
! 62: */
! 63: /*-
! 64: * Copyright (c) 1999
! 65: * Shin Takemura and PocketBSD Project. All rights reserved.
! 66: *
! 67: * Redistribution and use in source and binary forms, with or without
! 68: * modification, are permitted provided that the following conditions
! 69: * are met:
! 70: * 1. Redistributions of source code must retain the above copyright
! 71: * notice, this list of conditions and the following disclaimer.
! 72: * 2. Redistributions in binary form must reproduce the above copyright
! 73: * notice, this list of conditions and the following disclaimer in the
! 74: * documentation and/or other materials provided with the distribution.
! 75: * 3. All advertising materials mentioning features or use of this software
! 76: * must display the following acknowledgement:
! 77: * This product includes software developed by the PocketBSD project
! 78: * and its contributors.
! 79: * 4. Neither the name of the project nor the names of its contributors
! 80: * may be used to endorse or promote products derived from this software
! 81: * without specific prior written permission.
! 82: *
! 83: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 84: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 85: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 86: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 87: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 88: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 89: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 90: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 91: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 92: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 93: * SUCH DAMAGE.
! 94: *
! 95: */
! 96:
! 97: #include <sys/cdefs.h>
! 98: /*
! 99: __KERNEL_RCSID(0, "$NetBSD: pxa2x0.c,v 1.5 2003/12/12 16:42:44 thorpej Exp $");
! 100: */
! 101:
! 102: #include "pxaintc.h"
! 103: #include "pxagpio.h"
! 104: #include "pxadmac.h"
! 105:
! 106: #include <sys/param.h>
! 107: #include <sys/systm.h>
! 108: #include <sys/device.h>
! 109: #include <sys/kernel.h>
! 110: #include <sys/reboot.h>
! 111:
! 112: #include <machine/cpu.h>
! 113: #include <machine/bus.h>
! 114:
! 115: #include <arm/cpufunc.h>
! 116: #include <arm/mainbus/mainbus.h>
! 117: #include <arm/xscale/pxa2x0reg.h>
! 118: #include <arm/xscale/pxa2x0var.h>
! 119:
! 120: struct pxaip_softc {
! 121: struct device sc_dev;
! 122: bus_space_tag_t sc_bust;
! 123: bus_dma_tag_t sc_dmat;
! 124: bus_space_handle_t sc_bush_clk;
! 125: bus_space_handle_t sc_bush_rtc;
! 126: };
! 127:
! 128: /* prototypes */
! 129: int pxaip_match(struct device *, void *, void *);
! 130: void pxaip_attach(struct device *, struct device *, void *);
! 131: int pxaip_search(struct device *, void *, void *);
! 132: void pxaip_attach_critical(struct pxaip_softc *);
! 133: int pxaip_print(void *, const char *);
! 134:
! 135: int pxaip_measure_cpuclock(struct pxaip_softc *);
! 136:
! 137: /* attach structures */
! 138: #ifdef __NetBSD__
! 139: CFATTACH_DECL(pxaip, sizeof(struct pxaip_softc),
! 140: pxaip_match, pxaip_attach, NULL, NULL);
! 141: #else
! 142: struct cfattach pxaip_ca = {
! 143: sizeof(struct pxaip_softc), pxaip_match, pxaip_attach
! 144: };
! 145:
! 146: struct cfdriver pxaip_cd = {
! 147: NULL, "pxaip", DV_DULL
! 148: };
! 149: #endif
! 150:
! 151: struct pxaip_softc *pxaip_sc;
! 152:
! 153: int
! 154: pxaip_match(struct device *parent, void *match, void *aux)
! 155: {
! 156:
! 157: return 1;
! 158: }
! 159:
! 160: void
! 161: pxaip_attach(struct device *parent, struct device *self, void *aux)
! 162: {
! 163: struct pxaip_softc *sc = (struct pxaip_softc *)self;
! 164: extern int freq;
! 165: int cpuclock;
! 166:
! 167: pxaip_sc = sc;
! 168: sc->sc_bust = &pxa2x0_bs_tag;
! 169: sc->sc_dmat = &pxa2x0_bus_dma_tag;
! 170:
! 171: if (bus_space_map(sc->sc_bust, PXA2X0_CLKMAN_BASE, PXA2X0_CLKMAN_SIZE,
! 172: 0, &sc->sc_bush_clk))
! 173: panic("pxaip_attach: failed to map CLKMAN");
! 174:
! 175: if (bus_space_map(sc->sc_bust, PXA2X0_RTC_BASE, PXA2X0_RTC_SIZE,
! 176: 0, &sc->sc_bush_rtc))
! 177: panic("pxaip_attach: failed to map RTC");
! 178:
! 179: /*
! 180: * Calculate clock speed
! 181: * This takes 2 secs at most.
! 182: */
! 183: cpuclock = pxaip_measure_cpuclock(sc) / 1000;
! 184: if (cpuclock % 1000 > 500)
! 185: cpuclock = cpuclock + 1000 - cpuclock % 1000;
! 186: freq = cpuclock / 1000;
! 187:
! 188: printf(": CPU clock = %d.%03d MHz\n", cpuclock/1000, cpuclock%1000);
! 189:
! 190: /*
! 191: * Attach critical devices
! 192: */
! 193: pxaip_attach_critical(sc);
! 194:
! 195: /*
! 196: * Attach all other devices
! 197: */
! 198: config_search(pxaip_search, self, sc);
! 199:
! 200: }
! 201:
! 202: int
! 203: pxaip_search(struct device *parent, void *c, void *aux)
! 204: {
! 205: struct pxaip_softc *sc = aux;
! 206: struct pxaip_attach_args aa;
! 207: struct cfdata *cf = c;
! 208:
! 209: aa.pxa_iot = sc->sc_bust;
! 210: aa.pxa_dmat = sc->sc_dmat;
! 211: #if 0
! 212: aa.pxa_addr = cf->cf_addr;
! 213: aa.pxa_size = cf->cf_size;
! 214: aa.pxa_intr = cf->cf_intr;
! 215: aa.pxa_index = cf->cf_index;
! 216: #else
! 217: aa.pxa_addr = (cf->cf_loc)[0];
! 218: aa.pxa_size = (cf->cf_loc)[1];
! 219: aa.pxa_intr = (cf->cf_loc)[2];
! 220: aa.pxa_index = (cf->cf_loc)[3];
! 221: #endif
! 222:
! 223: config_found(parent, &aa, pxaip_print);
! 224:
! 225: return 0;
! 226: }
! 227:
! 228: void
! 229: pxaip_attach_critical(struct pxaip_softc *sc)
! 230: {
! 231: struct pxaip_attach_args aa;
! 232:
! 233: aa.pxa_iot = sc->sc_bust;
! 234: aa.pxa_dmat = sc->sc_dmat;
! 235: aa.pxa_addr = PXA2X0_INTCTL_BASE;
! 236: aa.pxa_size = PXA2X0_INTCTL_SIZE;
! 237: aa.pxa_intr = -1;
! 238: if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
! 239: panic("pxaip_attach_critical: failed to attach INTC!");
! 240:
! 241: #if NPXAGPIO > 0
! 242: aa.pxa_iot = sc->sc_bust;
! 243: aa.pxa_dmat = sc->sc_dmat;
! 244: aa.pxa_addr = PXA2X0_GPIO_BASE;
! 245: aa.pxa_size = PXA2X0_GPIO_SIZE;
! 246: aa.pxa_intr = -1;
! 247: if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
! 248: panic("pxaip_attach_critical: failed to attach GPIO!");
! 249: #endif
! 250:
! 251: #if NPXADMAC > 0
! 252: aa.pxa_iot = sc->sc_bust;
! 253: aa.pxa_dmat = sc->sc_dmat;
! 254: aa.pxa_addr = PXA2X0_DMAC_BASE;
! 255: aa.pxa_size = PXA2X0_DMAC_SIZE;
! 256: aa.pxa_intr = PXA2X0_INT_DMA;
! 257: if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
! 258: panic("pxaip_attach_critical: failed to attach DMAC!");
! 259: #endif
! 260: }
! 261:
! 262: int
! 263: pxaip_print(void *aux, const char *name)
! 264: {
! 265: struct pxaip_attach_args *sa = (struct pxaip_attach_args*)aux;
! 266:
! 267: if (sa->pxa_addr != -1) {
! 268: printf(" addr 0x%lx", sa->pxa_addr);
! 269: if (sa->pxa_size > -1)
! 270: printf("-0x%lx", sa->pxa_addr + sa->pxa_size-1);
! 271: }
! 272: if (sa->pxa_intr != -1)
! 273: printf(" intr %d", sa->pxa_intr);
! 274:
! 275: return (UNCONF);
! 276: }
! 277:
! 278: static inline uint32_t
! 279: read_clock_counter(void)
! 280: {
! 281: uint32_t x;
! 282: __asm __volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (x));
! 283:
! 284: return x;
! 285: }
! 286:
! 287: int
! 288: pxaip_measure_cpuclock(struct pxaip_softc *sc)
! 289: {
! 290: uint32_t rtc0, rtc1, start, end;
! 291: uint32_t pmcr_save;
! 292: bus_space_handle_t ioh;
! 293: int irq;
! 294:
! 295: ioh = sc->sc_bush_rtc;
! 296: irq = disable_interrupts(I32_bit|F32_bit);
! 297:
! 298: __asm __volatile( "mrc p14, 0, %0, c0, c1, 0" : "=r" (pmcr_save));
! 299: /* Enable clock counter */
! 300: __asm __volatile( "mcr p14, 0, %0, c0, c1, 0" : : "r" (0x0001));
! 301:
! 302: rtc0 = bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR);
! 303: /* Wait for next second starts */
! 304: while ((rtc1 = bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR)) == rtc0)
! 305: ;
! 306: start = read_clock_counter();
! 307: while(rtc1 == bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR))
! 308: ; /* Wait for 1sec */
! 309: end = read_clock_counter();
! 310:
! 311: __asm __volatile( "mcr p14, 0, %0, c0, c1, 0" : : "r" (pmcr_save));
! 312: restore_interrupts(irq);
! 313:
! 314: return end - start;
! 315: }
! 316:
! 317: void
! 318: pxa2x0_turbo_mode(int f)
! 319: {
! 320: __asm __volatile("mcr p14, 0, %0, c6, c0, 0" : : "r" (f));
! 321: }
! 322:
! 323: void
! 324: pxa2x0_probe_sdram(vaddr_t memctl_va, paddr_t *start, paddr_t *size)
! 325: {
! 326: u_int32_t mdcnfg, dwid, dcac, drac, dnb;
! 327: int i;
! 328:
! 329: mdcnfg = *((volatile u_int32_t *)(memctl_va + MEMCTL_MDCNFG));
! 330:
! 331: /*
! 332: * Scan all 4 SDRAM banks
! 333: */
! 334: for (i = 0; i < PXA2X0_SDRAM_BANKS; i++) {
! 335: start[i] = 0;
! 336: size[i] = 0;
! 337:
! 338: switch (i) {
! 339: case 0:
! 340: case 1:
! 341: if ((i == 0 && (mdcnfg & MDCNFG_DE0) == 0) ||
! 342: (i == 1 && (mdcnfg & MDCNFG_DE1) == 0))
! 343: continue;
! 344: dwid = mdcnfg >> MDCNFD_DWID01_SHIFT;
! 345: dcac = mdcnfg >> MDCNFD_DCAC01_SHIFT;
! 346: drac = mdcnfg >> MDCNFD_DRAC01_SHIFT;
! 347: dnb = mdcnfg >> MDCNFD_DNB01_SHIFT;
! 348: break;
! 349:
! 350: case 2:
! 351: case 3:
! 352: if ((i == 2 && (mdcnfg & MDCNFG_DE2) == 0) ||
! 353: (i == 3 && (mdcnfg & MDCNFG_DE3) == 0))
! 354: continue;
! 355: dwid = mdcnfg >> MDCNFD_DWID23_SHIFT;
! 356: dcac = mdcnfg >> MDCNFD_DCAC23_SHIFT;
! 357: drac = mdcnfg >> MDCNFD_DRAC23_SHIFT;
! 358: dnb = mdcnfg >> MDCNFD_DNB23_SHIFT;
! 359: break;
! 360: default:
! 361: panic("pxa2x0_probe_sdram: impossible");
! 362: }
! 363:
! 364: dwid = 2 << (1 - (dwid & MDCNFD_DWID_MASK)); /* 16/32 width */
! 365: dcac = 1 << ((dcac & MDCNFD_DCAC_MASK) + 8); /* 8-11 columns */
! 366: drac = 1 << ((drac & MDCNFD_DRAC_MASK) + 11); /* 11-13 rows */
! 367: dnb = 2 << (dnb & MDCNFD_DNB_MASK); /* # of banks */
! 368:
! 369: size[i] = (paddr_t)(dwid * dcac * drac * dnb);
! 370: start[i] = PXA2X0_SDRAM0_START + (i * PXA2X0_SDRAM_BANK_SIZE);
! 371: }
! 372: }
! 373:
! 374: void
! 375: pxa2x0_clkman_config(u_int clk, int enable)
! 376: {
! 377: struct pxaip_softc *sc;
! 378: u_int32_t rv;
! 379:
! 380: KDASSERT(pxaip_sc != NULL);
! 381: sc = pxaip_sc;
! 382:
! 383: rv = bus_space_read_4(sc->sc_bust, sc->sc_bush_clk, CLKMAN_CKEN);
! 384: rv &= ~clk;
! 385:
! 386: if (enable)
! 387: rv |= clk;
! 388:
! 389: bus_space_write_4(sc->sc_bust, sc->sc_bush_clk, CLKMAN_CKEN, rv);
! 390: }
! 391:
! 392: void
! 393: pxa2x0_rtc_setalarm(u_int32_t secs)
! 394: {
! 395: struct pxaip_softc *sc;
! 396: u_int32_t rv;
! 397: int s;
! 398:
! 399: KDASSERT(pxaip_sc != NULL);
! 400: sc = pxaip_sc;
! 401:
! 402: s = splhigh();
! 403: bus_space_write_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RTAR, secs);
! 404: rv = bus_space_read_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RTSR);
! 405: if (secs == 0)
! 406: bus_space_write_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RTSR,
! 407: (rv | RTSR_AL) & ~RTSR_ALE);
! 408: else
! 409: bus_space_write_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RTSR,
! 410: (rv | RTSR_AL | RTSR_ALE));
! 411: splx(s);
! 412: }
! 413:
! 414: u_int32_t
! 415: pxa2x0_rtc_getalarm(void)
! 416: {
! 417: struct pxaip_softc *sc;
! 418:
! 419: KDASSERT(pxaip_sc != NULL);
! 420: sc = pxaip_sc;
! 421:
! 422: return (bus_space_read_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RTAR));
! 423: }
! 424:
! 425: u_int32_t
! 426: pxa2x0_rtc_getsecs(void)
! 427: {
! 428: struct pxaip_softc *sc;
! 429:
! 430: KDASSERT(pxaip_sc != NULL);
! 431: sc = pxaip_sc;
! 432:
! 433: return (bus_space_read_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RCNR));
! 434: }
! 435:
! 436: void
! 437: resettodr(void)
! 438: {
! 439: struct pxaip_softc *sc = pxaip_sc;
! 440:
! 441: bus_space_write_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RCNR,
! 442: (u_int32_t)time.tv_sec);
! 443: }
! 444:
! 445: void
! 446: inittodr(time_t base)
! 447: {
! 448: struct pxaip_softc *sc = pxaip_sc;
! 449: u_int32_t rcnr;
! 450:
! 451: /* XXX decide if RCNR can be valid, based on the last reset
! 452: * XXX reason, i.e. RCSR. */
! 453: rcnr = bus_space_read_4(sc->sc_bust, sc->sc_bush_rtc, RTC_RCNR);
! 454:
! 455: /* XXX check how much RCNR differs from the filesystem date. */
! 456: if (rcnr > base)
! 457: time.tv_sec = rcnr;
! 458: else {
! 459: printf("WARNING: using filesystem date -- CHECK AND RESET THE DATE!\n");
! 460: time.tv_sec = base;
! 461: }
! 462:
! 463: time.tv_usec = 0;
! 464: }
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