elan520.c revision 1.25
1 /* $NetBSD: elan520.c,v 1.25 2008/03/03 04:16:26 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 /* 40 * Device driver for the AMD Elan SC520 System Controller. This attaches 41 * where the "pchb" driver might normally attach, and provides support for 42 * extra features on the SC520, such as the watchdog timer and GPIO. 43 * 44 * Information about the GP bus echo bug work-around is from code posted 45 * to the "soekris-tech" mailing list by Jasper Wallace. 46 */ 47 48 #include <sys/cdefs.h> 49 50 __KERNEL_RCSID(0, "$NetBSD: elan520.c,v 1.25 2008/03/03 04:16:26 dyoung Exp $"); 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/time.h> 55 #include <sys/device.h> 56 #include <sys/gpio.h> 57 #include <sys/mutex.h> 58 #include <sys/wdog.h> 59 60 #include <uvm/uvm_extern.h> 61 62 #include <machine/bus.h> 63 64 #include <dev/pci/pcivar.h> 65 66 #include <dev/pci/pcidevs.h> 67 68 #include "gpio.h" 69 #if NGPIO > 0 70 #include <dev/gpio/gpiovar.h> 71 #endif 72 73 #include <arch/i386/pci/elan520reg.h> 74 75 #include <dev/sysmon/sysmonvar.h> 76 77 #define ELAN_IRQ 1 78 #define PG0_PROT_SIZE PAGE_SIZE 79 80 struct elansc_softc { 81 struct device sc_dev; 82 device_t sc_par; 83 device_t sc_pex; 84 85 pci_chipset_tag_t sc_pc; 86 pcitag_t sc_tag; 87 bus_space_tag_t sc_memt; 88 bus_space_handle_t sc_memh; 89 int sc_echobug; 90 91 kmutex_t sc_mtx; 92 93 struct sysmon_wdog sc_smw; 94 void *sc_eih; 95 void *sc_pih; 96 void *sc_sh; 97 uint8_t sc_mpicmode; 98 uint8_t sc_picicr; 99 int sc_pg0par; 100 int sc_textpar; 101 #if NGPIO > 0 102 /* GPIO interface */ 103 struct gpio_chipset_tag sc_gpio_gc; 104 gpio_pin_t sc_gpio_pins[ELANSC_PIO_NPINS]; 105 #endif 106 }; 107 108 int elansc_wpvnmi = 1; 109 int elansc_pcinmi = 1; 110 int elansc_do_protect_pg0 = 1; 111 112 #if NGPIO > 0 113 static int elansc_gpio_pin_read(void *, int); 114 static void elansc_gpio_pin_write(void *, int, int); 115 static void elansc_gpio_pin_ctl(void *, int, int); 116 #endif 117 118 static void elansc_print_par(device_t, int, uint32_t); 119 static void elanpex_intr_establish(device_t, struct elansc_softc *); 120 static void elanpar_intr_establish(device_t, struct elansc_softc *); 121 static void elanpex_intr_disestablish(struct elansc_softc *); 122 static void elanpar_intr_disestablish(struct elansc_softc *); 123 124 static void 125 elansc_childdetached(device_t self, device_t child) 126 { 127 struct elansc_softc *sc = device_private(self); 128 129 if (child == sc->sc_par) 130 sc->sc_par = NULL; 131 if (child == sc->sc_pex) 132 sc->sc_pex = NULL; 133 /* elansc does not presently keep a pointer to 134 * the gpio, so there is nothing to do if it is detached. 135 */ 136 } 137 138 static void 139 elansc_wdogctl_write(struct elansc_softc *sc, uint16_t val) 140 { 141 uint8_t echo_mode = 0; /* XXX: gcc */ 142 143 KASSERT(mutex_owned(&sc->sc_mtx)); 144 145 /* Switch off GP bus echo mode if we need to. */ 146 if (sc->sc_echobug) { 147 echo_mode = bus_space_read_1(sc->sc_memt, sc->sc_memh, 148 MMCR_GPECHO); 149 bus_space_write_1(sc->sc_memt, sc->sc_memh, 150 MMCR_GPECHO, echo_mode & ~GPECHO_GP_ECHO_ENB); 151 } 152 153 /* Unlock the register. */ 154 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WDTMRCTL, 155 WDTMRCTL_UNLOCK1); 156 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WDTMRCTL, 157 WDTMRCTL_UNLOCK2); 158 159 /* Write the value. */ 160 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WDTMRCTL, val); 161 162 /* Switch GP bus echo mode back. */ 163 if (sc->sc_echobug) 164 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_GPECHO, 165 echo_mode); 166 } 167 168 static void 169 elansc_wdogctl_reset(struct elansc_softc *sc) 170 { 171 uint8_t echo_mode = 0/* XXX: gcc */; 172 173 KASSERT(mutex_owned(&sc->sc_mtx)); 174 175 /* Switch off GP bus echo mode if we need to. */ 176 if (sc->sc_echobug) { 177 echo_mode = bus_space_read_1(sc->sc_memt, sc->sc_memh, 178 MMCR_GPECHO); 179 bus_space_write_1(sc->sc_memt, sc->sc_memh, 180 MMCR_GPECHO, echo_mode & ~GPECHO_GP_ECHO_ENB); 181 } 182 183 /* Reset the watchdog. */ 184 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WDTMRCTL, 185 WDTMRCTL_RESET1); 186 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WDTMRCTL, 187 WDTMRCTL_RESET2); 188 189 /* Switch GP bus echo mode back. */ 190 if (sc->sc_echobug) 191 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_GPECHO, 192 echo_mode); 193 } 194 195 static const struct { 196 int period; /* whole seconds */ 197 uint16_t exp; /* exponent select */ 198 } elansc_wdog_periods[] = { 199 { 1, WDTMRCTL_EXP_SEL25 }, 200 { 2, WDTMRCTL_EXP_SEL26 }, 201 { 4, WDTMRCTL_EXP_SEL27 }, 202 { 8, WDTMRCTL_EXP_SEL28 }, 203 { 16, WDTMRCTL_EXP_SEL29 }, 204 { 32, WDTMRCTL_EXP_SEL30 }, 205 { 0, 0 }, 206 }; 207 208 static int 209 elansc_wdog_arm(struct elansc_softc *sc) 210 { 211 struct sysmon_wdog *smw = &sc->sc_smw; 212 int i; 213 uint16_t exp_sel = 0; /* XXX: gcc */ 214 215 KASSERT(mutex_owned(&sc->sc_mtx)); 216 217 if (smw->smw_period == WDOG_PERIOD_DEFAULT) { 218 smw->smw_period = 32; 219 exp_sel = WDTMRCTL_EXP_SEL30; 220 } else { 221 for (i = 0; elansc_wdog_periods[i].period != 0; i++) { 222 if (elansc_wdog_periods[i].period == 223 smw->smw_period) { 224 exp_sel = elansc_wdog_periods[i].exp; 225 break; 226 } 227 } 228 if (elansc_wdog_periods[i].period == 0) 229 return EINVAL; 230 } 231 elansc_wdogctl_write(sc, WDTMRCTL_ENB | 232 WDTMRCTL_WRST_ENB | exp_sel); 233 elansc_wdogctl_reset(sc); 234 return 0; 235 } 236 237 static int 238 elansc_wdog_setmode(struct sysmon_wdog *smw) 239 { 240 struct elansc_softc *sc = smw->smw_cookie; 241 int rc = 0; 242 243 mutex_enter(&sc->sc_mtx); 244 245 if (!device_is_active(&sc->sc_dev)) 246 rc = EBUSY; 247 else if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 248 elansc_wdogctl_write(sc, 249 WDTMRCTL_WRST_ENB | WDTMRCTL_EXP_SEL30); 250 } else 251 rc = elansc_wdog_arm(sc); 252 253 mutex_exit(&sc->sc_mtx); 254 return rc; 255 } 256 257 static int 258 elansc_wdog_tickle(struct sysmon_wdog *smw) 259 { 260 struct elansc_softc *sc = smw->smw_cookie; 261 262 mutex_enter(&sc->sc_mtx); 263 elansc_wdogctl_reset(sc); 264 mutex_exit(&sc->sc_mtx); 265 return 0; 266 } 267 268 static int 269 elansc_match(device_t parent, struct cfdata *match, void *aux) 270 { 271 struct pci_attach_args *pa = aux; 272 273 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD && 274 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_SC520_SC) 275 return (10); /* beat pchb */ 276 277 return (0); 278 } 279 280 static const char *elansc_speeds[] = { 281 "(reserved 00)", 282 "100MHz", 283 "133MHz", 284 "(reserved 11)", 285 }; 286 287 static int 288 elanpar_intr(void *arg) 289 { 290 struct elansc_softc *sc = arg; 291 uint16_t wpvsta; 292 unsigned win; 293 uint32_t par; 294 const char *wpvstr; 295 296 wpvsta = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_WPVSTA); 297 298 if ((wpvsta & MMCR_WPVSTA_WPV_STA) == 0) 299 return 0; 300 301 win = __SHIFTOUT(wpvsta, MMCR_WPVSTA_WPV_WINDOW); 302 303 par = bus_space_read_4(sc->sc_memt, sc->sc_memh, MMCR_PAR(win)); 304 305 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WPVSTA, 306 MMCR_WPVSTA_WPV_STA); 307 308 switch (wpvsta & MMCR_WPVSTA_WPV_MSTR) { 309 case MMCR_WPVSTA_WPV_MSTR_CPU: 310 wpvstr = "cpu"; 311 break; 312 case MMCR_WPVSTA_WPV_MSTR_PCI: 313 wpvstr = "pci"; 314 break; 315 case MMCR_WPVSTA_WPV_MSTR_GP: 316 wpvstr = "gp"; 317 break; 318 default: 319 wpvstr = "unknown"; 320 break; 321 } 322 aprint_error_dev(sc->sc_par, 323 "%s violated write-protect window %u\n", wpvstr, win); 324 elansc_print_par(sc->sc_par, win, par); 325 return 0; 326 } 327 328 static int 329 elanpex_intr(void *arg) 330 { 331 static struct { 332 const char *string; 333 bool nonfatal; 334 } cmd[16] = { 335 [0] = {.string = "not latched"} 336 , [1] = {.string = "special cycle"} 337 , [2] = {.string = "i/o read"} 338 , [3] = {.string = "i/o write"} 339 , [4] = {.string = "4"} 340 , [5] = {.string = "5"} 341 , [6] = {.string = "memory rd"} 342 , [7] = {.string = "memory wr"} 343 , [8] = {.string = "8"} 344 , [9] = {.string = "9"} 345 , [10] = {.string = "cfg rd", .nonfatal = true} 346 , [11] = {.string = "cfg wr"} 347 , [12] = {.string = "memory rd mul"} 348 , [13] = {.string = "dual-address cycle"} 349 , [14] = {.string = "memory rd line"} 350 , [15] = {.string = "memory wr & inv"} 351 }; 352 353 static const struct { 354 uint16_t bit; 355 const char *msg; 356 } mmsg[] = { 357 {MMCR_HBMSTIRQSTA_M_RTRTO_IRQ_STA, "retry timeout"} 358 , {MMCR_HBMSTIRQSTA_M_TABRT_IRQ_STA, "target abort"} 359 , {MMCR_HBMSTIRQSTA_M_MABRT_IRQ_STA, "abort"} 360 , {MMCR_HBMSTIRQSTA_M_SERR_IRQ_STA, "system error"} 361 , {MMCR_HBMSTIRQSTA_M_RPER_IRQ_STA, "received parity error"} 362 , {MMCR_HBMSTIRQSTA_M_DPER_IRQ_STA, "detected parity error"} 363 }, tmsg[] = { 364 {MMCR_HBTGTIRQSTA_T_DLYTO_IRQ_STA, "delayed txn timeout"} 365 , {MMCR_HBTGTIRQSTA_T_APER_IRQ_STA, "address parity"} 366 , {MMCR_HBTGTIRQSTA_T_DPER_IRQ_STA, "data parity"} 367 }; 368 uint8_t pciarbsta; 369 uint16_t mstcmd, mstirq, tgtid, tgtirq; 370 uint32_t mstaddr; 371 uint16_t mstack = 0, tgtack = 0; 372 int fatal = 0, i, handled = 0; 373 struct elansc_softc *sc = arg; 374 375 pciarbsta = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_PCIARBSTA); 376 mstirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQSTA); 377 mstaddr = bus_space_read_4(sc->sc_memt, sc->sc_memh, MMCR_MSTINTADD); 378 tgtirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQSTA); 379 380 if ((pciarbsta & MMCR_PCIARBSTA_GNT_TO_STA) != 0) { 381 aprint_error_dev(sc->sc_pex, 382 "grant time-out, GNT%" __PRIuBITS "# asserted\n", 383 __SHIFTOUT(pciarbsta, MMCR_PCIARBSTA_GNT_TO_ID)); 384 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_PCIARBSTA, 385 MMCR_PCIARBSTA_GNT_TO_STA); 386 handled = true; 387 } 388 389 mstcmd = __SHIFTOUT(mstirq, MMCR_HBMSTIRQSTA_M_CMD_IRQ_ID); 390 391 for (i = 0; i < __arraycount(mmsg); i++) { 392 if ((mstirq & mmsg[i].bit) == 0) 393 continue; 394 aprint_error_dev(sc->sc_pex, 395 "%s %08" PRIx32 " master %s\n", 396 cmd[mstcmd].string, mstaddr, mmsg[i].msg); 397 398 mstack |= mmsg[i].bit; 399 if (!cmd[mstcmd].nonfatal) 400 fatal = true; 401 } 402 403 tgtid = __SHIFTOUT(tgtirq, MMCR_HBTGTIRQSTA_T_IRQ_ID); 404 405 for (i = 0; i < __arraycount(tmsg); i++) { 406 if ((tgtirq & tmsg[i].bit) == 0) 407 continue; 408 aprint_error_dev(sc->sc_pex, "%1x target %s\n", tgtid, 409 tmsg[i].msg); 410 tgtack |= tmsg[i].bit; 411 } 412 413 /* acknowledge interrupts */ 414 if (tgtack != 0) { 415 handled = true; 416 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQSTA, 417 tgtack); 418 } 419 if (mstack != 0) { 420 handled = true; 421 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQSTA, 422 mstack); 423 } 424 return fatal ? 0 : (handled ? 1 : 0); 425 } 426 427 #define elansc_print_1(__dev, __sc, __reg) \ 428 do { \ 429 aprint_debug_dev(__dev, \ 430 "%s: %s %02" PRIx8 "\n", __func__, #__reg, \ 431 bus_space_read_1((__sc)->sc_memt, (__sc)->sc_memh, __reg)); \ 432 } while (/*CONSTCOND*/0) 433 434 static void 435 elansc_print_par(device_t dev, int i, uint32_t par) 436 { 437 uint32_t addr, sz, unit; 438 const char *tgtstr; 439 440 switch (par & MMCR_PAR_TARGET) { 441 default: 442 case MMCR_PAR_TARGET_OFF: 443 tgtstr = "off"; 444 break; 445 case MMCR_PAR_TARGET_GPIO: 446 tgtstr = "gpio"; 447 break; 448 case MMCR_PAR_TARGET_GPMEM: 449 tgtstr = "gpmem"; 450 break; 451 case MMCR_PAR_TARGET_PCI: 452 tgtstr = "pci"; 453 break; 454 case MMCR_PAR_TARGET_BOOTCS: 455 tgtstr = "bootcs"; 456 break; 457 case MMCR_PAR_TARGET_ROMCS1: 458 tgtstr = "romcs1"; 459 break; 460 case MMCR_PAR_TARGET_ROMCS2: 461 tgtstr = "romcs2"; 462 break; 463 case MMCR_PAR_TARGET_SDRAM: 464 tgtstr = "sdram"; 465 break; 466 } 467 if ((par & MMCR_PAR_TARGET) == MMCR_PAR_TARGET_GPIO) { 468 unit = 1; 469 sz = __SHIFTOUT(par, MMCR_PAR_IO_SZ); 470 addr = __SHIFTOUT(par, MMCR_PAR_IO_ST_ADR); 471 } else if ((par & MMCR_PAR_PG_SZ) != 0) { 472 unit = 64 * 1024; 473 sz = __SHIFTOUT(par, MMCR_PAR_64KB_SZ); 474 addr = __SHIFTOUT(par, MMCR_PAR_64KB_ST_ADR); 475 } else { 476 unit = 4 * 1024; 477 sz = __SHIFTOUT(par, MMCR_PAR_4KB_SZ); 478 addr = __SHIFTOUT(par, MMCR_PAR_4KB_ST_ADR); 479 } 480 481 aprint_debug_dev(dev, 482 "PAR[%d] %08" PRIx32 " tgt %s attr %1" __PRIxBITS 483 " start %08" PRIx32 " size %" PRIu32 "\n", 484 i, par, tgtstr, __SHIFTOUT(par, MMCR_PAR_ATTR), 485 addr * unit, (sz + 1) * unit); 486 } 487 488 static void 489 elansc_print_all_par(device_t dev, 490 bus_space_tag_t memt, bus_space_handle_t memh) 491 { 492 int i; 493 uint32_t par; 494 495 for (i = 0; i < 16; i++) { 496 par = bus_space_read_4(memt, memh, MMCR_PAR(i)); 497 elansc_print_par(dev, i, par); 498 } 499 } 500 501 static int 502 elansc_alloc_par(bus_space_tag_t memt, bus_space_handle_t memh) 503 { 504 int i; 505 uint32_t par; 506 507 for (i = 0; i < 16; i++) { 508 509 par = bus_space_read_4(memt, memh, MMCR_PAR(i)); 510 511 if ((par & MMCR_PAR_TARGET) == MMCR_PAR_TARGET_OFF) 512 break; 513 } 514 if (i == 16) 515 return -1; 516 return i; 517 } 518 519 static void 520 elansc_disable_par(bus_space_tag_t memt, bus_space_handle_t memh, int idx) 521 { 522 uint32_t par; 523 par = bus_space_read_4(memt, memh, MMCR_PAR(idx)); 524 par &= ~MMCR_PAR_TARGET; 525 par |= MMCR_PAR_TARGET_OFF; 526 bus_space_write_4(memt, memh, MMCR_PAR(idx), par); 527 } 528 529 static int 530 elansc_protect_text(device_t self, struct elansc_softc *sc) 531 { 532 int i; 533 uint32_t par; 534 uint32_t protsize, unprotsize; 535 const uint32_t sfkb = 64 * 1024; 536 paddr_t start_pa, end_pa; 537 extern char kernel_text, etext; 538 bus_space_tag_t memt; 539 bus_space_handle_t memh; 540 541 memt = sc->sc_memt; 542 memh = sc->sc_memh; 543 544 if (!pmap_extract(pmap_kernel(), (vaddr_t)&kernel_text, &start_pa) || 545 !pmap_extract(pmap_kernel(), (vaddr_t)&etext, &end_pa)) 546 return -1; 547 548 if (&etext - &kernel_text != end_pa - start_pa) { 549 aprint_error_dev(self, "kernel text may not be contiguous\n"); 550 return -1; 551 } 552 553 if ((i = elansc_alloc_par(memt, memh)) == -1) { 554 aprint_error_dev(self, "cannot allocate PAR\n"); 555 return -1; 556 } 557 558 par = bus_space_read_4(memt, memh, MMCR_PAR(i)); 559 560 aprint_debug_dev(self, 561 "protect kernel text at physical addresses %p - %p\n", 562 (void *)start_pa, (void *)end_pa); 563 564 unprotsize = sfkb - start_pa % sfkb; 565 start_pa += unprotsize; 566 unprotsize += end_pa % sfkb; 567 end_pa -= end_pa % sfkb; 568 569 aprint_debug_dev(self, 570 "actually protect kernel text at physical addresses %p - %p\n", 571 (void *)start_pa, (void *)end_pa); 572 573 aprint_verbose_dev(self, 574 "%" PRIu32 " bytes of kernel text are unprotected\n", unprotsize); 575 576 protsize = end_pa - start_pa; 577 578 /* clear PG_SZ, attribute, target, size, address. */ 579 par = MMCR_PAR_TARGET_SDRAM | MMCR_PAR_ATTR_NOWRITE | MMCR_PAR_PG_SZ; 580 par |= __SHIFTIN(protsize / sfkb - 1, MMCR_PAR_64KB_SZ); 581 par |= __SHIFTIN(start_pa / sfkb, MMCR_PAR_64KB_ST_ADR); 582 bus_space_write_4(memt, memh, MMCR_PAR(i), par); 583 return i; 584 } 585 586 static int 587 elansc_protect_pg0(device_t self, struct elansc_softc *sc) 588 { 589 int i; 590 uint32_t par; 591 const paddr_t pg0_paddr = 0; 592 bus_space_tag_t memt; 593 bus_space_handle_t memh; 594 595 memt = sc->sc_memt; 596 memh = sc->sc_memh; 597 598 if (elansc_do_protect_pg0 == 0) 599 return -1; 600 601 if ((i = elansc_alloc_par(memt, memh)) == -1) 602 return -1; 603 604 par = bus_space_read_4(memt, memh, MMCR_PAR(i)); 605 606 aprint_debug_dev(self, "protect page 0\n"); 607 608 /* clear PG_SZ, attribute, target, size, address. */ 609 par = MMCR_PAR_TARGET_SDRAM | MMCR_PAR_ATTR_NOWRITE; 610 par |= __SHIFTIN(PG0_PROT_SIZE / PAGE_SIZE - 1, MMCR_PAR_4KB_SZ); 611 par |= __SHIFTIN(pg0_paddr / PAGE_SIZE, MMCR_PAR_4KB_ST_ADR); 612 bus_space_write_4(memt, memh, MMCR_PAR(i), par); 613 return i; 614 } 615 616 static void 617 elanpex_intr_ack(bus_space_tag_t memt, bus_space_handle_t memh) 618 { 619 bus_space_write_1(memt, memh, MMCR_PCIARBSTA, 620 MMCR_PCIARBSTA_GNT_TO_STA); 621 bus_space_write_2(memt, memh, MMCR_HBTGTIRQSTA, MMCR_TGTIRQ_ACT); 622 bus_space_write_2(memt, memh, MMCR_HBMSTIRQSTA, MMCR_MSTIRQ_ACT); 623 } 624 625 static bool 626 elansc_suspend(device_t dev PMF_FN_ARGS) 627 { 628 bool rc; 629 struct elansc_softc *sc = device_private(dev); 630 631 mutex_enter(&sc->sc_mtx); 632 rc = ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED); 633 mutex_exit(&sc->sc_mtx); 634 if (!rc) 635 aprint_debug_dev(dev, "watchdog enabled, suspend forbidden"); 636 return rc; 637 } 638 639 static bool 640 elansc_resume(device_t dev PMF_FN_ARGS) 641 { 642 struct elansc_softc *sc = device_private(dev); 643 644 mutex_enter(&sc->sc_mtx); 645 /* Set up the watchdog registers with some defaults. */ 646 elansc_wdogctl_write(sc, WDTMRCTL_WRST_ENB | WDTMRCTL_EXP_SEL30); 647 648 /* ...and clear it. */ 649 elansc_wdogctl_reset(sc); 650 mutex_exit(&sc->sc_mtx); 651 652 return true; 653 } 654 655 static int 656 elansc_detach(device_t self, int flags) 657 { 658 int rc; 659 struct elansc_softc *sc = device_private(self); 660 661 if ((rc = config_detach_children(self, flags)) != 0) 662 return rc; 663 664 pmf_device_deregister(self); 665 666 if ((rc = sysmon_wdog_unregister(&sc->sc_smw)) != 0) { 667 if (rc == ERESTART) 668 rc = EINTR; 669 return rc; 670 } 671 672 mutex_enter(&sc->sc_mtx); 673 674 /* Set up the watchdog registers with some defaults. */ 675 elansc_wdogctl_write(sc, WDTMRCTL_WRST_ENB | WDTMRCTL_EXP_SEL30); 676 677 /* ...and clear it. */ 678 elansc_wdogctl_reset(sc); 679 680 bus_space_unmap(sc->sc_memt, sc->sc_memh, PAGE_SIZE); 681 682 mutex_exit(&sc->sc_mtx); 683 mutex_destroy(&sc->sc_mtx); 684 return 0; 685 } 686 687 static void * 688 elansc_intr_establish(device_t dev, int (*handler)(void *), void *arg) 689 { 690 struct pic *pic; 691 void *ih; 692 693 if ((pic = intr_findpic(ELAN_IRQ)) == NULL) { 694 aprint_error_dev(dev, "PIC for irq %d not found\n", 695 ELAN_IRQ); 696 return NULL; 697 } else if ((ih = intr_establish(ELAN_IRQ, pic, ELAN_IRQ, 698 IST_LEVEL, IPL_HIGH, handler, arg)) == NULL) { 699 aprint_error_dev(dev, 700 "could not establish interrupt\n"); 701 return NULL; 702 } 703 aprint_verbose_dev(dev, "interrupting at irq %d\n", ELAN_IRQ); 704 return ih; 705 } 706 707 static bool 708 elanpex_resume(device_t self PMF_FN_ARGS) 709 { 710 struct elansc_softc *sc = device_private(device_parent(self)); 711 712 elanpex_intr_establish(self, sc); 713 return sc->sc_eih != NULL; 714 } 715 716 static bool 717 elanpex_suspend(device_t self PMF_FN_ARGS) 718 { 719 struct elansc_softc *sc = device_private(device_parent(self)); 720 721 elanpex_intr_disestablish(sc); 722 723 return true; 724 } 725 726 static bool 727 elanpar_resume(device_t self PMF_FN_ARGS) 728 { 729 struct elansc_softc *sc = device_private(device_parent(self)); 730 731 elanpar_intr_establish(self, sc); 732 return sc->sc_pih != NULL; 733 } 734 735 static bool 736 elanpar_suspend(device_t self PMF_FN_ARGS) 737 { 738 struct elansc_softc *sc = device_private(device_parent(self)); 739 740 elanpar_intr_disestablish(sc); 741 742 return true; 743 } 744 745 static void 746 elanpex_intr_establish(device_t self, struct elansc_softc *sc) 747 { 748 uint8_t sysarbctl; 749 uint16_t pcihostmap, mstirq, tgtirq; 750 751 pcihostmap = bus_space_read_2(sc->sc_memt, sc->sc_memh, 752 MMCR_PCIHOSTMAP); 753 /* Priority P2 (Master PIC IR1) */ 754 pcihostmap &= ~MMCR_PCIHOSTMAP_PCI_IRQ_MAP; 755 pcihostmap |= __SHIFTIN(__BIT(ELAN_IRQ), MMCR_PCIHOSTMAP_PCI_IRQ_MAP); 756 if (elansc_pcinmi) 757 pcihostmap |= MMCR_PCIHOSTMAP_PCI_NMI_ENB; 758 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_PCIHOSTMAP, 759 pcihostmap); 760 761 elanpex_intr_ack(sc->sc_memt, sc->sc_memh); 762 763 sysarbctl = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_SYSARBCTL); 764 mstirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQCTL); 765 tgtirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQCTL); 766 767 sysarbctl |= MMCR_SYSARBCTL_GNT_TO_INT_ENB; 768 769 mstirq |= MMCR_HBMSTIRQCTL_M_RTRTO_IRQ_ENB; 770 mstirq |= MMCR_HBMSTIRQCTL_M_TABRT_IRQ_ENB; 771 mstirq |= MMCR_HBMSTIRQCTL_M_MABRT_IRQ_ENB; 772 mstirq |= MMCR_HBMSTIRQCTL_M_SERR_IRQ_ENB; 773 mstirq |= MMCR_HBMSTIRQCTL_M_RPER_IRQ_ENB; 774 mstirq |= MMCR_HBMSTIRQCTL_M_DPER_IRQ_ENB; 775 776 tgtirq |= MMCR_HBTGTIRQCTL_T_DLYTO_IRQ_ENB; 777 tgtirq |= MMCR_HBTGTIRQCTL_T_APER_IRQ_ENB; 778 tgtirq |= MMCR_HBTGTIRQCTL_T_DPER_IRQ_ENB; 779 780 if (elansc_pcinmi) { 781 sc->sc_eih = nmi_establish(elanpex_intr, sc); 782 783 mstirq |= MMCR_HBMSTIRQCTL_M_RTRTO_IRQ_SEL; 784 mstirq |= MMCR_HBMSTIRQCTL_M_TABRT_IRQ_SEL; 785 mstirq |= MMCR_HBMSTIRQCTL_M_MABRT_IRQ_SEL; 786 mstirq |= MMCR_HBMSTIRQCTL_M_SERR_IRQ_SEL; 787 mstirq |= MMCR_HBMSTIRQCTL_M_RPER_IRQ_SEL; 788 mstirq |= MMCR_HBMSTIRQCTL_M_DPER_IRQ_SEL; 789 790 tgtirq |= MMCR_HBTGTIRQCTL_T_DLYTO_IRQ_SEL; 791 tgtirq |= MMCR_HBTGTIRQCTL_T_APER_IRQ_SEL; 792 tgtirq |= MMCR_HBTGTIRQCTL_T_DPER_IRQ_SEL; 793 } else 794 sc->sc_eih = elansc_intr_establish(self, elanpex_intr, sc); 795 796 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_SYSARBCTL, sysarbctl); 797 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQCTL, mstirq); 798 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQCTL, tgtirq); 799 } 800 801 static void 802 elanpex_attach(device_t parent, device_t self, void *aux) 803 { 804 struct elansc_softc *sc = device_private(parent); 805 806 aprint_naive(": PCI Exceptions\n"); 807 aprint_normal(": AMD Elan SC520 PCI Exceptions\n"); 808 809 elanpex_intr_establish(self, sc); 810 811 aprint_debug_dev(self, "HBMSTIRQCTL %04x\n", 812 bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQCTL)); 813 814 aprint_debug_dev(self, "HBTGTIRQCTL %04x\n", 815 bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQCTL)); 816 817 aprint_debug_dev(self, "PCIHOSTMAP %04x\n", 818 bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_PCIHOSTMAP)); 819 820 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, 821 pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG) | 822 PCI_COMMAND_PARITY_ENABLE|PCI_COMMAND_SERR_ENABLE); 823 824 if (!pmf_device_register(self, elanpex_suspend, elanpex_resume)) 825 aprint_error_dev(self, "could not establish power hooks\n"); 826 } 827 828 static void 829 elanpex_intr_disestablish(struct elansc_softc *sc) 830 { 831 uint8_t sysarbctl; 832 uint16_t pcihostmap, mstirq, tgtirq; 833 834 sysarbctl = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_SYSARBCTL); 835 sysarbctl &= ~MMCR_SYSARBCTL_GNT_TO_INT_ENB; 836 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_SYSARBCTL, sysarbctl); 837 838 mstirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQCTL); 839 mstirq &= ~MMCR_HBMSTIRQCTL_M_RTRTO_IRQ_ENB; 840 mstirq &= ~MMCR_HBMSTIRQCTL_M_TABRT_IRQ_ENB; 841 mstirq &= ~MMCR_HBMSTIRQCTL_M_MABRT_IRQ_ENB; 842 mstirq &= ~MMCR_HBMSTIRQCTL_M_SERR_IRQ_ENB; 843 mstirq &= ~MMCR_HBMSTIRQCTL_M_RPER_IRQ_ENB; 844 mstirq &= ~MMCR_HBMSTIRQCTL_M_DPER_IRQ_ENB; 845 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBMSTIRQCTL, mstirq); 846 847 tgtirq = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQCTL); 848 tgtirq &= ~MMCR_HBTGTIRQCTL_T_DLYTO_IRQ_ENB; 849 tgtirq &= ~MMCR_HBTGTIRQCTL_T_APER_IRQ_ENB; 850 tgtirq &= ~MMCR_HBTGTIRQCTL_T_DPER_IRQ_ENB; 851 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_HBTGTIRQCTL, tgtirq); 852 853 pcihostmap = bus_space_read_2(sc->sc_memt, sc->sc_memh, 854 MMCR_PCIHOSTMAP); 855 /* Priority P2 (Master PIC IR1) */ 856 pcihostmap &= ~MMCR_PCIHOSTMAP_PCI_IRQ_MAP; 857 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_PCIHOSTMAP, 858 pcihostmap); 859 860 if (elansc_pcinmi) 861 nmi_disestablish(sc->sc_eih); 862 else 863 intr_disestablish(sc->sc_eih); 864 sc->sc_eih = NULL; 865 866 } 867 868 static int 869 elanpex_detach(device_t self, int flags) 870 { 871 struct elansc_softc *sc = device_private(device_parent(self)); 872 873 pmf_device_deregister(self); 874 elanpex_intr_disestablish(sc); 875 876 return 0; 877 } 878 879 static void 880 elanpar_intr_establish(device_t self, struct elansc_softc *sc) 881 { 882 uint8_t adddecctl, wpvmap; 883 884 wpvmap = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_WPVMAP); 885 wpvmap &= ~MMCR_WPVMAP_INT_MAP; 886 if (elansc_wpvnmi) 887 wpvmap |= MMCR_WPVMAP_INT_NMI; 888 else 889 wpvmap |= __SHIFTIN(__BIT(ELAN_IRQ), MMCR_WPVMAP_INT_MAP); 890 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_WPVMAP, wpvmap); 891 892 /* clear interrupt status */ 893 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WPVSTA, 894 MMCR_WPVSTA_WPV_STA); 895 896 /* establish interrupt */ 897 if (elansc_wpvnmi) 898 sc->sc_pih = nmi_establish(elanpar_intr, sc); 899 else 900 sc->sc_pih = elansc_intr_establish(self, elanpar_intr, sc); 901 902 adddecctl = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_ADDDECCTL); 903 adddecctl |= MMCR_ADDDECCTL_WPV_INT_ENB; 904 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_ADDDECCTL, adddecctl); 905 } 906 907 static void 908 elanpar_attach(device_t parent, device_t self, void *aux) 909 { 910 struct elansc_softc *sc = device_private(parent); 911 912 aprint_naive(": Programmable Address Regions\n"); 913 aprint_normal(": AMD Elan SC520 Programmable Address Regions\n"); 914 915 elansc_print_1(self, sc, MMCR_WPVMAP); 916 elansc_print_all_par(self, sc->sc_memt, sc->sc_memh); 917 918 sc->sc_pg0par = elansc_protect_pg0(self, sc); 919 sc->sc_textpar = elansc_protect_text(self, sc); 920 921 elanpar_intr_establish(self, sc); 922 923 elansc_print_1(self, sc, MMCR_ADDDECCTL); 924 925 if (!pmf_device_register(self, elanpar_suspend, elanpar_resume)) 926 aprint_error_dev(self, "could not establish power hooks\n"); 927 } 928 929 static void 930 elanpar_intr_disestablish(struct elansc_softc *sc) 931 { 932 uint8_t adddecctl, wpvmap; 933 934 /* disable interrupt, acknowledge it, disestablish our 935 * handler, unmap it 936 */ 937 adddecctl = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_ADDDECCTL); 938 adddecctl &= ~MMCR_ADDDECCTL_WPV_INT_ENB; 939 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_ADDDECCTL, adddecctl); 940 941 bus_space_write_2(sc->sc_memt, sc->sc_memh, MMCR_WPVSTA, 942 MMCR_WPVSTA_WPV_STA); 943 944 if (elansc_wpvnmi) 945 nmi_disestablish(sc->sc_pih); 946 else 947 intr_disestablish(sc->sc_pih); 948 sc->sc_pih = NULL; 949 950 wpvmap = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_WPVMAP); 951 wpvmap &= ~MMCR_WPVMAP_INT_MAP; 952 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_WPVMAP, wpvmap); 953 } 954 955 static int 956 elanpar_detach(device_t self, int flags) 957 { 958 struct elansc_softc *sc = device_private(device_parent(self)); 959 960 pmf_device_deregister(self); 961 962 if (sc->sc_textpar != -1) { 963 elansc_disable_par(sc->sc_memt, sc->sc_memh, sc->sc_textpar); 964 sc->sc_textpar = -1; 965 } 966 if (sc->sc_pg0par != -1) { 967 elansc_disable_par(sc->sc_memt, sc->sc_memh, sc->sc_pg0par); 968 sc->sc_pg0par = -1; 969 } 970 971 elanpar_intr_disestablish(sc); 972 973 return 0; 974 } 975 976 static void 977 elansc_attach(device_t parent, device_t self, void *aux) 978 { 979 struct elansc_softc *sc = device_private(self); 980 struct pci_attach_args *pa = aux; 981 uint16_t rev; 982 uint8_t cpuctl, picicr, ressta; 983 #if NGPIO > 0 984 struct gpiobus_attach_args gba; 985 int pin, reg, shift; 986 uint16_t data; 987 #endif 988 sc->sc_pc = pa->pa_pc; 989 sc->sc_tag = pa->pa_tag; 990 991 aprint_naive(": System Controller\n"); 992 aprint_normal(": AMD Elan SC520 System Controller\n"); 993 994 sc->sc_memt = pa->pa_memt; 995 if (bus_space_map(sc->sc_memt, MMCR_BASE_ADDR, PAGE_SIZE, 0, 996 &sc->sc_memh) != 0) { 997 aprint_error_dev(&sc->sc_dev, "unable to map registers\n"); 998 return; 999 } 1000 1001 mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_HIGH); 1002 1003 rev = bus_space_read_2(sc->sc_memt, sc->sc_memh, MMCR_REVID); 1004 cpuctl = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_CPUCTL); 1005 1006 aprint_normal_dev(&sc->sc_dev, 1007 "product %d stepping %d.%d, CPU clock %s\n", 1008 (rev & REVID_PRODID) >> REVID_PRODID_SHIFT, 1009 (rev & REVID_MAJSTEP) >> REVID_MAJSTEP_SHIFT, 1010 (rev & REVID_MINSTEP), 1011 elansc_speeds[cpuctl & CPUCTL_CPU_CLK_SPD_MASK]); 1012 1013 /* 1014 * SC520 rev A1 has a bug that affects the watchdog timer. If 1015 * the GP bus echo mode is enabled, writing to the watchdog control 1016 * register is blocked. 1017 * 1018 * The BIOS in some systems (e.g. the Soekris net4501) enables 1019 * GP bus echo for various reasons, so we need to switch it off 1020 * when we talk to the watchdog timer. 1021 * 1022 * XXX The step 1.1 (B1?) in my Soekris net4501 also has this 1023 * XXX problem, so we'll just enable it for all Elan SC520s 1024 * XXX for now. --thorpej (at) NetBSD.org 1025 */ 1026 if (1 || rev == ((PRODID_ELAN_SC520 << REVID_PRODID_SHIFT) | 1027 (0 << REVID_MAJSTEP_SHIFT) | (1))) 1028 sc->sc_echobug = 1; 1029 1030 /* 1031 * Determine cause of the last reset, and issue a warning if it 1032 * was due to watchdog expiry. 1033 */ 1034 ressta = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_RESSTA); 1035 if (ressta & RESSTA_WDT_RST_DET) 1036 aprint_error_dev(&sc->sc_dev, 1037 "WARNING: LAST RESET DUE TO WATCHDOG EXPIRATION!\n"); 1038 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_RESSTA, ressta); 1039 1040 elansc_print_1(self, sc, MMCR_MPICMODE); 1041 elansc_print_1(self, sc, MMCR_SL1PICMODE); 1042 elansc_print_1(self, sc, MMCR_SL2PICMODE); 1043 elansc_print_1(self, sc, MMCR_PICICR); 1044 1045 sc->sc_mpicmode = bus_space_read_1(sc->sc_memt, sc->sc_memh, 1046 MMCR_MPICMODE); 1047 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_MPICMODE, 1048 sc->sc_mpicmode | __BIT(ELAN_IRQ)); 1049 1050 sc->sc_picicr = bus_space_read_1(sc->sc_memt, sc->sc_memh, MMCR_PICICR); 1051 picicr = sc->sc_picicr; 1052 if (elansc_pcinmi || elansc_wpvnmi) 1053 picicr |= MMCR_PICICR_NMI_ENB; 1054 #if 0 1055 /* PC/AT compatibility */ 1056 picicr |= MMCR_PICICR_S1_GINT_MODE|MMCR_PICICR_M_GINT_MODE; 1057 #endif 1058 bus_space_write_1(sc->sc_memt, sc->sc_memh, MMCR_PICICR, picicr); 1059 1060 elansc_print_1(self, sc, MMCR_PICICR); 1061 elansc_print_1(self, sc, MMCR_MPICMODE); 1062 1063 mutex_enter(&sc->sc_mtx); 1064 /* Set up the watchdog registers with some defaults. */ 1065 elansc_wdogctl_write(sc, WDTMRCTL_WRST_ENB | WDTMRCTL_EXP_SEL30); 1066 1067 /* ...and clear it. */ 1068 elansc_wdogctl_reset(sc); 1069 mutex_exit(&sc->sc_mtx); 1070 1071 if (!pmf_device_register(self, elansc_suspend, elansc_resume)) 1072 aprint_error_dev(self, "could not establish power hooks\n"); 1073 1074 #if NGPIO > 0 1075 /* Initialize GPIO pins array */ 1076 for (pin = 0; pin < ELANSC_PIO_NPINS; pin++) { 1077 sc->sc_gpio_pins[pin].pin_num = pin; 1078 sc->sc_gpio_pins[pin].pin_caps = GPIO_PIN_INPUT | 1079 GPIO_PIN_OUTPUT; 1080 1081 /* Read initial state */ 1082 reg = (pin < 16 ? MMCR_PIODIR15_0 : MMCR_PIODIR31_16); 1083 shift = pin % 16; 1084 data = bus_space_read_2(sc->sc_memt, sc->sc_memh, reg); 1085 if ((data & (1 << shift)) == 0) 1086 sc->sc_gpio_pins[pin].pin_flags = GPIO_PIN_INPUT; 1087 else 1088 sc->sc_gpio_pins[pin].pin_flags = GPIO_PIN_OUTPUT; 1089 if (elansc_gpio_pin_read(sc, pin) == 0) 1090 sc->sc_gpio_pins[pin].pin_state = GPIO_PIN_LOW; 1091 else 1092 sc->sc_gpio_pins[pin].pin_state = GPIO_PIN_HIGH; 1093 } 1094 1095 /* Create controller tag */ 1096 sc->sc_gpio_gc.gp_cookie = sc; 1097 sc->sc_gpio_gc.gp_pin_read = elansc_gpio_pin_read; 1098 sc->sc_gpio_gc.gp_pin_write = elansc_gpio_pin_write; 1099 sc->sc_gpio_gc.gp_pin_ctl = elansc_gpio_pin_ctl; 1100 1101 gba.gba_gc = &sc->sc_gpio_gc; 1102 gba.gba_pins = sc->sc_gpio_pins; 1103 gba.gba_npins = ELANSC_PIO_NPINS; 1104 1105 sc->sc_par = config_found_ia(&sc->sc_dev, "elanparbus", NULL, NULL); 1106 sc->sc_pex = config_found_ia(&sc->sc_dev, "elanpexbus", NULL, NULL); 1107 /* Attach GPIO framework */ 1108 config_found_ia(&sc->sc_dev, "gpiobus", &gba, gpiobus_print); 1109 #endif /* NGPIO */ 1110 1111 /* 1112 * Hook up the watchdog timer. 1113 */ 1114 sc->sc_smw.smw_name = device_xname(&sc->sc_dev); 1115 sc->sc_smw.smw_cookie = sc; 1116 sc->sc_smw.smw_setmode = elansc_wdog_setmode; 1117 sc->sc_smw.smw_tickle = elansc_wdog_tickle; 1118 sc->sc_smw.smw_period = 32; /* actually 32.54 */ 1119 if (sysmon_wdog_register(&sc->sc_smw) != 0) { 1120 aprint_error_dev(&sc->sc_dev, 1121 "unable to register watchdog with sysmon\n"); 1122 } 1123 } 1124 1125 static int 1126 elanpex_match(device_t parent, struct cfdata *match, void *aux) 1127 { 1128 struct elansc_softc *sc = device_private(parent); 1129 1130 return sc->sc_pex == NULL; 1131 } 1132 1133 static int 1134 elanpar_match(device_t parent, struct cfdata *match, void *aux) 1135 { 1136 struct elansc_softc *sc = device_private(parent); 1137 1138 return sc->sc_par == NULL; 1139 } 1140 1141 CFATTACH_DECL_NEW(elanpar, sizeof(struct device), 1142 elanpar_match, elanpar_attach, elanpar_detach, NULL); 1143 1144 CFATTACH_DECL_NEW(elanpex, sizeof(struct device), 1145 elanpex_match, elanpex_attach, elanpex_detach, NULL); 1146 1147 CFATTACH_DECL2(elansc, sizeof(struct elansc_softc), 1148 elansc_match, elansc_attach, elansc_detach, NULL, NULL, 1149 elansc_childdetached); 1150 1151 #if NGPIO > 0 1152 static int 1153 elansc_gpio_pin_read(void *arg, int pin) 1154 { 1155 struct elansc_softc *sc = arg; 1156 int reg, shift; 1157 uint16_t data; 1158 1159 reg = (pin < 16 ? MMCR_PIODATA15_0 : MMCR_PIODATA31_16); 1160 shift = pin % 16; 1161 1162 mutex_enter(&sc->sc_mtx); 1163 data = bus_space_read_2(sc->sc_memt, sc->sc_memh, reg); 1164 mutex_exit(&sc->sc_mtx); 1165 1166 return ((data >> shift) & 0x1); 1167 } 1168 1169 static void 1170 elansc_gpio_pin_write(void *arg, int pin, int value) 1171 { 1172 struct elansc_softc *sc = arg; 1173 int reg, shift; 1174 uint16_t data; 1175 1176 reg = (pin < 16 ? MMCR_PIODATA15_0 : MMCR_PIODATA31_16); 1177 shift = pin % 16; 1178 1179 mutex_enter(&sc->sc_mtx); 1180 data = bus_space_read_2(sc->sc_memt, sc->sc_memh, reg); 1181 if (value == 0) 1182 data &= ~(1 << shift); 1183 else if (value == 1) 1184 data |= (1 << shift); 1185 1186 bus_space_write_2(sc->sc_memt, sc->sc_memh, reg, data); 1187 mutex_exit(&sc->sc_mtx); 1188 } 1189 1190 static void 1191 elansc_gpio_pin_ctl(void *arg, int pin, int flags) 1192 { 1193 struct elansc_softc *sc = arg; 1194 int reg, shift; 1195 uint16_t data; 1196 1197 reg = (pin < 16 ? MMCR_PIODIR15_0 : MMCR_PIODIR31_16); 1198 shift = pin % 16; 1199 mutex_enter(&sc->sc_mtx); 1200 data = bus_space_read_2(sc->sc_memt, sc->sc_memh, reg); 1201 if (flags & GPIO_PIN_INPUT) 1202 data &= ~(1 << shift); 1203 if (flags & GPIO_PIN_OUTPUT) 1204 data |= (1 << shift); 1205 1206 bus_space_write_2(sc->sc_memt, sc->sc_memh, reg, data); 1207 mutex_exit(&sc->sc_mtx); 1208 } 1209 #endif /* NGPIO */ 1210
Indexes created Tue Sep 30 20:09:53 GMT 2025