Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/pci/alpm.c
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1 /*- 2 * Copyright (c) 1998, 1999, 2001 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Power Management support for the Acer M15x3 chipsets 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD: releng/5.4/sys/pci/alpm.c 142884 2005-03-01 08:11:52Z imp $"); 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/systm.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/uio.h> 40 41 #include <machine/bus_pio.h> 42 #include <machine/bus_memio.h> 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pcireg.h> 49 50 #include <dev/iicbus/iiconf.h> 51 #include <dev/smbus/smbconf.h> 52 #include "smbus_if.h" 53 54 #define ALPM_DEBUG(x) if (alpm_debug) (x) 55 56 #ifdef DEBUG 57 static int alpm_debug = 1; 58 #else 59 static int alpm_debug = 0; 60 #endif 61 62 #define ACER_M1543_PMU_ID 0x710110b9 63 64 /* Uncomment this line to force another I/O base address for SMB */ 65 /* #define ALPM_SMBIO_BASE_ADDR 0x3a80 */ 66 67 /* I/O registers offsets - the base address is programmed via the 68 * SMBBA PCI configuration register 69 */ 70 #define SMBSTS 0x0 /* SMBus host/slave status register */ 71 #define SMBCMD 0x1 /* SMBus host/slave command register */ 72 #define SMBSTART 0x2 /* start to generate programmed cycle */ 73 #define SMBHADDR 0x3 /* host address register */ 74 #define SMBHDATA 0x4 /* data A register for host controller */ 75 #define SMBHDATB 0x5 /* data B register for host controller */ 76 #define SMBHBLOCK 0x6 /* block register for host controller */ 77 #define SMBHCMD 0x7 /* command register for host controller */ 78 79 /* SMBSTS masks */ 80 #define TERMINATE 0x80 81 #define BUS_COLLI 0x40 82 #define DEVICE_ERR 0x20 83 #define SMI_I_STS 0x10 84 #define HST_BSY 0x08 85 #define IDL_STS 0x04 86 #define HSTSLV_STS 0x02 87 #define HSTSLV_BSY 0x01 88 89 /* SMBCMD masks */ 90 #define SMB_BLK_CLR 0x80 91 #define T_OUT_CMD 0x08 92 #define ABORT_HOST 0x04 93 94 /* SMBus commands */ 95 #define SMBQUICK 0x00 96 #define SMBSRBYTE 0x10 /* send/receive byte */ 97 #define SMBWRBYTE 0x20 /* write/read byte */ 98 #define SMBWRWORD 0x30 /* write/read word */ 99 #define SMBWRBLOCK 0x40 /* write/read block */ 100 101 /* PCI configuration registers and masks 102 */ 103 #define COM 0x4 104 #define COM_ENABLE_IO 0x1 105 106 #define SMBBA 0x14 107 108 #define ATPC 0x5b 109 #define ATPC_SMBCTRL 0x04 /* XX linux has this as 0x6 */ 110 111 #define SMBHSI 0xe0 112 #define SMBHSI_SLAVE 0x2 113 #define SMBHSI_HOST 0x1 114 115 #define SMBHCBC 0xe2 116 #define SMBHCBC_CLOCK 0x70 117 118 #define SMBCLOCK_149K 0x0 119 #define SMBCLOCK_74K 0x20 120 #define SMBCLOCK_37K 0x40 121 #define SMBCLOCK_223K 0x80 122 #define SMBCLOCK_111K 0xa0 123 #define SMBCLOCK_55K 0xc0 124 125 struct alpm_softc { 126 int base; 127 struct resource *res; 128 bus_space_tag_t smbst; 129 bus_space_handle_t smbsh; 130 device_t smbus; 131 }; 132 133 #define ALPM_SMBINB(alpm,register) \ 134 (bus_space_read_1(alpm->smbst, alpm->smbsh, register)) 135 #define ALPM_SMBOUTB(alpm,register,value) \ 136 (bus_space_write_1(alpm->smbst, alpm->smbsh, register, value)) 137 138 static int 139 alpm_probe(device_t dev) 140 { 141 #ifdef ALPM_SMBIO_BASE_ADDR 142 u_int32_t l; 143 #endif 144 145 if (pci_get_devid(dev) == ACER_M1543_PMU_ID) { 146 device_set_desc(dev, "AcerLabs M15x3 Power Management Unit"); 147 148 #ifdef ALPM_SMBIO_BASE_ADDR 149 if (bootverbose || alpm_debug) 150 device_printf(dev, "forcing base I/O at 0x%x\n", 151 ALPM_SMBIO_BASE_ADDR); 152 153 /* disable I/O */ 154 l = pci_read_config(dev, COM, 2); 155 pci_write_config(dev, COM, l & ~COM_ENABLE_IO, 2); 156 157 /* set the I/O base address */ 158 pci_write_config(dev, SMBBA, ALPM_SMBIO_BASE_ADDR | 0x1, 4); 159 160 /* enable I/O */ 161 pci_write_config(dev, COM, l | COM_ENABLE_IO, 2); 162 163 if (bus_set_resource(dev, SYS_RES_IOPORT, SMBBA, 164 ALPM_SMBIO_BASE_ADDR, 256)) { 165 device_printf(dev, "could not set bus resource\n"); 166 return (ENXIO); 167 } 168 #endif 169 return (BUS_PROBE_DEFAULT); 170 } 171 172 return (ENXIO); 173 } 174 175 static int 176 alpm_attach(device_t dev) 177 { 178 int rid; 179 u_int32_t l; 180 struct alpm_softc *alpm; 181 182 alpm = device_get_softc(dev); 183 184 /* Unlock SMBIO base register access */ 185 l = pci_read_config(dev, ATPC, 1); 186 pci_write_config(dev, ATPC, l & ~ATPC_SMBCTRL, 1); 187 188 /* 189 * XX linux sets clock to 74k, should we? 190 l = pci_read_config(dev, SMBHCBC, 1); 191 l &= 0x1f; 192 l |= SMBCLOCK_74K; 193 pci_write_config(dev, SMBHCBC, l, 1); 194 */ 195 196 if (bootverbose || alpm_debug) { 197 l = pci_read_config(dev, SMBHSI, 1); 198 device_printf(dev, "%s/%s", 199 (l & SMBHSI_HOST) ? "host":"nohost", 200 (l & SMBHSI_SLAVE) ? "slave":"noslave"); 201 202 l = pci_read_config(dev, SMBHCBC, 1); 203 switch (l & SMBHCBC_CLOCK) { 204 case SMBCLOCK_149K: 205 printf(" 149K"); 206 break; 207 case SMBCLOCK_74K: 208 printf(" 74K"); 209 break; 210 case SMBCLOCK_37K: 211 printf(" 37K"); 212 break; 213 case SMBCLOCK_223K: 214 printf(" 223K"); 215 break; 216 case SMBCLOCK_111K: 217 printf(" 111K"); 218 break; 219 case SMBCLOCK_55K: 220 printf(" 55K"); 221 break; 222 default: 223 printf("unkown"); 224 break; 225 } 226 printf("\n"); 227 } 228 229 rid = SMBBA; 230 alpm->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 231 RF_ACTIVE); 232 233 if (alpm->res == NULL) { 234 device_printf(dev,"Could not allocate Bus space\n"); 235 return (ENXIO); 236 } 237 alpm->smbst = rman_get_bustag(alpm->res); 238 alpm->smbsh = rman_get_bushandle(alpm->res); 239 240 /* attach the smbus */ 241 alpm->smbus = device_add_child(dev, "smbus", -1); 242 bus_generic_attach(dev); 243 244 return (0); 245 } 246 247 static int 248 alpm_detach(device_t dev) 249 { 250 struct alpm_softc *alpm = device_get_softc(dev); 251 252 if (alpm->smbus) { 253 device_delete_child(dev, alpm->smbus); 254 alpm->smbus = NULL; 255 } 256 257 if (alpm->res) 258 bus_release_resource(dev, SYS_RES_IOPORT, SMBBA, alpm->res); 259 260 return (0); 261 } 262 263 static int 264 alpm_callback(device_t dev, int index, caddr_t *data) 265 { 266 int error = 0; 267 268 switch (index) { 269 case SMB_REQUEST_BUS: 270 case SMB_RELEASE_BUS: 271 /* ok, bus allocation accepted */ 272 break; 273 default: 274 error = EINVAL; 275 } 276 277 return (error); 278 } 279 280 static int 281 alpm_clear(struct alpm_softc *sc) 282 { 283 ALPM_SMBOUTB(sc, SMBSTS, 0xff); 284 DELAY(10); 285 286 return (0); 287 } 288 289 #if 0 290 static int 291 alpm_abort(struct alpm_softc *sc) 292 { 293 ALPM_SMBOUTB(sc, SMBCMD, T_OUT_CMD | ABORT_HOST); 294 295 return (0); 296 } 297 #endif 298 299 static int 300 alpm_idle(struct alpm_softc *sc) 301 { 302 u_char sts; 303 304 sts = ALPM_SMBINB(sc, SMBSTS); 305 306 ALPM_DEBUG(printf("alpm: idle? STS=0x%x\n", sts)); 307 308 return (sts & IDL_STS); 309 } 310 311 /* 312 * Poll the SMBus controller 313 */ 314 static int 315 alpm_wait(struct alpm_softc *sc) 316 { 317 int count = 10000; 318 u_char sts = 0; 319 int error; 320 321 /* wait for command to complete and SMBus controller is idle */ 322 while(count--) { 323 DELAY(10); 324 sts = ALPM_SMBINB(sc, SMBSTS); 325 if (sts & SMI_I_STS) 326 break; 327 } 328 329 ALPM_DEBUG(printf("alpm: STS=0x%x\n", sts)); 330 331 error = SMB_ENOERR; 332 333 if (!count) 334 error |= SMB_ETIMEOUT; 335 336 if (sts & TERMINATE) 337 error |= SMB_EABORT; 338 339 if (sts & BUS_COLLI) 340 error |= SMB_ENOACK; 341 342 if (sts & DEVICE_ERR) 343 error |= SMB_EBUSERR; 344 345 if (error != SMB_ENOERR) 346 alpm_clear(sc); 347 348 return (error); 349 } 350 351 static int 352 alpm_quick(device_t dev, u_char slave, int how) 353 { 354 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 355 int error; 356 357 alpm_clear(sc); 358 if (!alpm_idle(sc)) 359 return (EBUSY); 360 361 switch (how) { 362 case SMB_QWRITE: 363 ALPM_DEBUG(printf("alpm: QWRITE to 0x%x", slave)); 364 ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB); 365 break; 366 case SMB_QREAD: 367 ALPM_DEBUG(printf("alpm: QREAD to 0x%x", slave)); 368 ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB); 369 break; 370 default: 371 panic("%s: unknown QUICK command (%x)!", __func__, 372 how); 373 } 374 ALPM_SMBOUTB(sc, SMBCMD, SMBQUICK); 375 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 376 377 error = alpm_wait(sc); 378 379 ALPM_DEBUG(printf(", error=0x%x\n", error)); 380 381 return (error); 382 } 383 384 static int 385 alpm_sendb(device_t dev, u_char slave, char byte) 386 { 387 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 388 int error; 389 390 alpm_clear(sc); 391 if (!alpm_idle(sc)) 392 return (SMB_EBUSY); 393 394 ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB); 395 ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE); 396 ALPM_SMBOUTB(sc, SMBHDATA, byte); 397 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 398 399 error = alpm_wait(sc); 400 401 ALPM_DEBUG(printf("alpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error)); 402 403 return (error); 404 } 405 406 static int 407 alpm_recvb(device_t dev, u_char slave, char *byte) 408 { 409 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 410 int error; 411 412 alpm_clear(sc); 413 if (!alpm_idle(sc)) 414 return (SMB_EBUSY); 415 416 ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB); 417 ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE); 418 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 419 420 if ((error = alpm_wait(sc)) == SMB_ENOERR) 421 *byte = ALPM_SMBINB(sc, SMBHDATA); 422 423 ALPM_DEBUG(printf("alpm: RECVB from 0x%x, byte=0x%x, error=0x%x\n", slave, *byte, error)); 424 425 return (error); 426 } 427 428 static int 429 alpm_writeb(device_t dev, u_char slave, char cmd, char byte) 430 { 431 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 432 int error; 433 434 alpm_clear(sc); 435 if (!alpm_idle(sc)) 436 return (SMB_EBUSY); 437 438 ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB); 439 ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE); 440 ALPM_SMBOUTB(sc, SMBHDATA, byte); 441 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 442 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 443 444 error = alpm_wait(sc); 445 446 ALPM_DEBUG(printf("alpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error)); 447 448 return (error); 449 } 450 451 static int 452 alpm_readb(device_t dev, u_char slave, char cmd, char *byte) 453 { 454 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 455 int error; 456 457 alpm_clear(sc); 458 if (!alpm_idle(sc)) 459 return (SMB_EBUSY); 460 461 ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB); 462 ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE); 463 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 464 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 465 466 if ((error = alpm_wait(sc)) == SMB_ENOERR) 467 *byte = ALPM_SMBINB(sc, SMBHDATA); 468 469 ALPM_DEBUG(printf("alpm: READB from 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, *byte, error)); 470 471 return (error); 472 } 473 474 static int 475 alpm_writew(device_t dev, u_char slave, char cmd, short word) 476 { 477 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 478 int error; 479 480 alpm_clear(sc); 481 if (!alpm_idle(sc)) 482 return (SMB_EBUSY); 483 484 ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB); 485 ALPM_SMBOUTB(sc, SMBCMD, SMBWRWORD); 486 ALPM_SMBOUTB(sc, SMBHDATA, word & 0x00ff); 487 ALPM_SMBOUTB(sc, SMBHDATB, (word & 0xff00) >> 8); 488 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 489 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 490 491 error = alpm_wait(sc); 492 493 ALPM_DEBUG(printf("alpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error)); 494 495 return (error); 496 } 497 498 static int 499 alpm_readw(device_t dev, u_char slave, char cmd, short *word) 500 { 501 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 502 int error; 503 u_char high, low; 504 505 alpm_clear(sc); 506 if (!alpm_idle(sc)) 507 return (SMB_EBUSY); 508 509 ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB); 510 ALPM_SMBOUTB(sc, SMBCMD, SMBWRWORD); 511 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 512 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 513 514 if ((error = alpm_wait(sc)) == SMB_ENOERR) { 515 low = ALPM_SMBINB(sc, SMBHDATA); 516 high = ALPM_SMBINB(sc, SMBHDATB); 517 518 *word = ((high & 0xff) << 8) | (low & 0xff); 519 } 520 521 ALPM_DEBUG(printf("alpm: READW from 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, *word, error)); 522 523 return (error); 524 } 525 526 static int 527 alpm_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf) 528 { 529 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 530 u_char remain, len, i; 531 int error = SMB_ENOERR; 532 533 alpm_clear(sc); 534 if(!alpm_idle(sc)) 535 return (SMB_EBUSY); 536 537 remain = count; 538 while (remain) { 539 len = min(remain, 32); 540 541 ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB); 542 543 /* set the cmd and reset the 544 * 32-byte long internal buffer */ 545 ALPM_SMBOUTB(sc, SMBCMD, SMBWRBLOCK | SMB_BLK_CLR); 546 547 ALPM_SMBOUTB(sc, SMBHDATA, len); 548 549 /* fill the 32-byte internal buffer */ 550 for (i=0; i<len; i++) { 551 ALPM_SMBOUTB(sc, SMBHBLOCK, buf[count-remain+i]); 552 DELAY(2); 553 } 554 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 555 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 556 557 if ((error = alpm_wait(sc)) != SMB_ENOERR) 558 goto error; 559 560 remain -= len; 561 } 562 563 error: 564 ALPM_DEBUG(printf("alpm: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error)); 565 566 return (error); 567 } 568 569 static int 570 alpm_bread(device_t dev, u_char slave, char cmd, u_char count, char *buf) 571 { 572 struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev); 573 u_char remain, len, i; 574 int error = SMB_ENOERR; 575 576 alpm_clear(sc); 577 if (!alpm_idle(sc)) 578 return (SMB_EBUSY); 579 580 remain = count; 581 while (remain) { 582 ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB); 583 584 /* set the cmd and reset the 585 * 32-byte long internal buffer */ 586 ALPM_SMBOUTB(sc, SMBCMD, SMBWRBLOCK | SMB_BLK_CLR); 587 588 ALPM_SMBOUTB(sc, SMBHCMD, cmd); 589 ALPM_SMBOUTB(sc, SMBSTART, 0xff); 590 591 if ((error = alpm_wait(sc)) != SMB_ENOERR) 592 goto error; 593 594 len = ALPM_SMBINB(sc, SMBHDATA); 595 596 /* read the 32-byte internal buffer */ 597 for (i=0; i<len; i++) { 598 buf[count-remain+i] = ALPM_SMBINB(sc, SMBHBLOCK); 599 DELAY(2); 600 } 601 602 remain -= len; 603 } 604 error: 605 ALPM_DEBUG(printf("alpm: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error)); 606 607 return (error); 608 } 609 610 static devclass_t alpm_devclass; 611 612 static device_method_t alpm_methods[] = { 613 /* device interface */ 614 DEVMETHOD(device_probe, alpm_probe), 615 DEVMETHOD(device_attach, alpm_attach), 616 DEVMETHOD(device_detach, alpm_detach), 617 618 /* smbus interface */ 619 DEVMETHOD(smbus_callback, alpm_callback), 620 DEVMETHOD(smbus_quick, alpm_quick), 621 DEVMETHOD(smbus_sendb, alpm_sendb), 622 DEVMETHOD(smbus_recvb, alpm_recvb), 623 DEVMETHOD(smbus_writeb, alpm_writeb), 624 DEVMETHOD(smbus_readb, alpm_readb), 625 DEVMETHOD(smbus_writew, alpm_writew), 626 DEVMETHOD(smbus_readw, alpm_readw), 627 DEVMETHOD(smbus_bwrite, alpm_bwrite), 628 DEVMETHOD(smbus_bread, alpm_bread), 629 630 { 0, 0 } 631 }; 632 633 static driver_t alpm_driver = { 634 "alpm", 635 alpm_methods, 636 sizeof(struct alpm_softc) 637 }; 638 639 DRIVER_MODULE(alpm, pci, alpm_driver, alpm_devclass, 0, 0); 640 MODULE_DEPEND(alpm, pci, 1, 1, 1); 641 MODULE_DEPEND(alpm, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER); 642 MODULE_VERSION(alpm, 1);
Cache object: bea4c54a0fd68bdfb193a0126236d7ab
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