1 /* hermes.c 2 * 3 * Driver core for the "Hermes" wireless MAC controller, as used in 4 * the Lucent Orinoco and Cabletron RoamAbout cards. It should also 5 * work on the hfa3841 and hfa3842 MAC controller chips used in the 6 * Prism II chipsets. 7 * 8 * This is not a complete driver, just low-level access routines for 9 * the MAC controller itself. 10 * 11 * Based on the prism2 driver from Absolute Value Systems' linux-wlan 12 * project, the Linux wvlan_cs driver, Lucent's HCF-Light 13 * (wvlan_hcf.c) library, and the NetBSD wireless driver (in no 14 * particular order). 15 * 16 * Copyright (C) 2000, David Gibson, Linuxcare Australia. 17 * (C) Copyright David Gibson, IBM Corp. 2001-2003. 18 * 19 * The contents of this file are subject to the Mozilla Public License 20 * Version 1.1 (the "License"); you may not use this file except in 21 * compliance with the License. You may obtain a copy of the License 22 * at http://www.mozilla.org/MPL/ 23 * 24 * Software distributed under the License is distributed on an "AS IS" 25 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 26 * the License for the specific language governing rights and 27 * limitations under the License. 28 * 29 * Alternatively, the contents of this file may be used under the 30 * terms of the GNU General Public License version 2 (the "GPL"), in 31 * which case the provisions of the GPL are applicable instead of the 32 * above. If you wish to allow the use of your version of this file 33 * only under the terms of the GPL and not to allow others to use your 34 * version of this file under the MPL, indicate your decision by 35 * deleting the provisions above and replace them with the notice and 36 * other provisions required by the GPL. If you do not delete the 37 * provisions above, a recipient may use your version of this file 38 * under either the MPL or the GPL. 39 */ 40 41 #include <linux/net.h> 42 #include <linux/module.h> 43 #include <linux/kernel.h> 44 #include <linux/delay.h> 45 46 #include "hermes.h" 47 48 /* These are maximum timeouts. Most often, card wil react much faster */ 49 #define CMD_BUSY_TIMEOUT (100) /* In iterations of ~1us */ 50 #define CMD_INIT_TIMEOUT (50000) /* in iterations of ~10us */ 51 #define CMD_COMPL_TIMEOUT (20000) /* in iterations of ~10us */ 52 #define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */ 53 54 /* 55 * AUX port access. To unlock the AUX port write the access keys to the 56 * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL 57 * register. Then read it and make sure it's HERMES_AUX_ENABLED. 58 */ 59 #define HERMES_AUX_ENABLE 0x8000 /* Enable auxiliary port access */ 60 #define HERMES_AUX_DISABLE 0x4000 /* Disable to auxiliary port access */ 61 #define HERMES_AUX_ENABLED 0xC000 /* Auxiliary port is open */ 62 #define HERMES_AUX_DISABLED 0x0000 /* Auxiliary port is closed */ 63 64 #define HERMES_AUX_PW0 0xFE01 65 #define HERMES_AUX_PW1 0xDC23 66 #define HERMES_AUX_PW2 0xBA45 67 68 /* HERMES_CMD_DOWNLD */ 69 #define HERMES_PROGRAM_DISABLE (0x0000 | HERMES_CMD_DOWNLD) 70 #define HERMES_PROGRAM_ENABLE_VOLATILE (0x0100 | HERMES_CMD_DOWNLD) 71 #define HERMES_PROGRAM_ENABLE_NON_VOLATILE (0x0200 | HERMES_CMD_DOWNLD) 72 #define HERMES_PROGRAM_NON_VOLATILE (0x0300 | HERMES_CMD_DOWNLD) 73 74 /* 75 * Debugging helpers 76 */ 77 78 #define DMSG(stuff...) do {printk(KERN_DEBUG "hermes @ %p: " , hw->iobase); \ 79 printk(stuff); } while (0) 80 81 #undef HERMES_DEBUG 82 #ifdef HERMES_DEBUG 83 84 #define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff) 85 86 #else /* ! HERMES_DEBUG */ 87 88 #define DEBUG(lvl, stuff...) do { } while (0) 89 90 #endif /* ! HERMES_DEBUG */ 91 92 static const struct hermes_ops hermes_ops_local; 93 94 /* 95 * Internal functions 96 */ 97 98 /* Issue a command to the chip. Waiting for it to complete is the caller's 99 problem. 100 101 Returns -EBUSY if the command register is busy, 0 on success. 102 103 Callable from any context. 104 */ 105 static int hermes_issue_cmd(struct hermes *hw, u16 cmd, u16 param0, 106 u16 param1, u16 param2) 107 { 108 int k = CMD_BUSY_TIMEOUT; 109 u16 reg; 110 111 /* First wait for the command register to unbusy */ 112 reg = hermes_read_regn(hw, CMD); 113 while ((reg & HERMES_CMD_BUSY) && k) { 114 k--; 115 udelay(1); 116 reg = hermes_read_regn(hw, CMD); 117 } 118 if (reg & HERMES_CMD_BUSY) 119 return -EBUSY; 120 121 hermes_write_regn(hw, PARAM2, param2); 122 hermes_write_regn(hw, PARAM1, param1); 123 hermes_write_regn(hw, PARAM0, param0); 124 hermes_write_regn(hw, CMD, cmd); 125 126 return 0; 127 } 128 129 /* 130 * Function definitions 131 */ 132 133 /* For doing cmds that wipe the magic constant in SWSUPPORT0 */ 134 static int hermes_doicmd_wait(struct hermes *hw, u16 cmd, 135 u16 parm0, u16 parm1, u16 parm2, 136 struct hermes_response *resp) 137 { 138 int err = 0; 139 int k; 140 u16 status, reg; 141 142 err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2); 143 if (err) 144 return err; 145 146 reg = hermes_read_regn(hw, EVSTAT); 147 k = CMD_INIT_TIMEOUT; 148 while ((!(reg & HERMES_EV_CMD)) && k) { 149 k--; 150 udelay(10); 151 reg = hermes_read_regn(hw, EVSTAT); 152 } 153 154 hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC); 155 156 if (!hermes_present(hw)) { 157 DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n", 158 hw->iobase); 159 err = -ENODEV; 160 goto out; 161 } 162 163 if (!(reg & HERMES_EV_CMD)) { 164 printk(KERN_ERR "hermes @ %p: " 165 "Timeout waiting for card to reset (reg=0x%04x)!\n", 166 hw->iobase, reg); 167 err = -ETIMEDOUT; 168 goto out; 169 } 170 171 status = hermes_read_regn(hw, STATUS); 172 if (resp) { 173 resp->status = status; 174 resp->resp0 = hermes_read_regn(hw, RESP0); 175 resp->resp1 = hermes_read_regn(hw, RESP1); 176 resp->resp2 = hermes_read_regn(hw, RESP2); 177 } 178 179 hermes_write_regn(hw, EVACK, HERMES_EV_CMD); 180 181 if (status & HERMES_STATUS_RESULT) 182 err = -EIO; 183 out: 184 return err; 185 } 186 187 void hermes_struct_init(struct hermes *hw, void __iomem *address, 188 int reg_spacing) 189 { 190 hw->iobase = address; 191 hw->reg_spacing = reg_spacing; 192 hw->inten = 0x0; 193 hw->eeprom_pda = false; 194 hw->ops = &hermes_ops_local; 195 } 196 EXPORT_SYMBOL(hermes_struct_init); 197 198 static int hermes_init(struct hermes *hw) 199 { 200 u16 reg; 201 int err = 0; 202 int k; 203 204 /* We don't want to be interrupted while resetting the chipset */ 205 hw->inten = 0x0; 206 hermes_write_regn(hw, INTEN, 0); 207 hermes_write_regn(hw, EVACK, 0xffff); 208 209 /* Normally it's a "can't happen" for the command register to 210 be busy when we go to issue a command because we are 211 serializing all commands. However we want to have some 212 chance of resetting the card even if it gets into a stupid 213 state, so we actually wait to see if the command register 214 will unbusy itself here. */ 215 k = CMD_BUSY_TIMEOUT; 216 reg = hermes_read_regn(hw, CMD); 217 while (k && (reg & HERMES_CMD_BUSY)) { 218 if (reg == 0xffff) /* Special case - the card has probably been 219 removed, so don't wait for the timeout */ 220 return -ENODEV; 221 222 k--; 223 udelay(1); 224 reg = hermes_read_regn(hw, CMD); 225 } 226 227 /* No need to explicitly handle the timeout - if we've timed 228 out hermes_issue_cmd() will probably return -EBUSY below */ 229 230 /* According to the documentation, EVSTAT may contain 231 obsolete event occurrence information. We have to acknowledge 232 it by writing EVACK. */ 233 reg = hermes_read_regn(hw, EVSTAT); 234 hermes_write_regn(hw, EVACK, reg); 235 236 /* We don't use hermes_docmd_wait here, because the reset wipes 237 the magic constant in SWSUPPORT0 away, and it gets confused */ 238 err = hermes_doicmd_wait(hw, HERMES_CMD_INIT, 0, 0, 0, NULL); 239 240 return err; 241 } 242 243 /* Issue a command to the chip, and (busy!) wait for it to 244 * complete. 245 * 246 * Returns: 247 * < 0 on internal error 248 * 0 on success 249 * > 0 on error returned by the firmware 250 * 251 * Callable from any context, but locking is your problem. */ 252 static int hermes_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0, 253 struct hermes_response *resp) 254 { 255 int err; 256 int k; 257 u16 reg; 258 u16 status; 259 260 err = hermes_issue_cmd(hw, cmd, parm0, 0, 0); 261 if (err) { 262 if (!hermes_present(hw)) { 263 if (net_ratelimit()) 264 printk(KERN_WARNING "hermes @ %p: " 265 "Card removed while issuing command " 266 "0x%04x.\n", hw->iobase, cmd); 267 err = -ENODEV; 268 } else 269 if (net_ratelimit()) 270 printk(KERN_ERR "hermes @ %p: " 271 "Error %d issuing command 0x%04x.\n", 272 hw->iobase, err, cmd); 273 goto out; 274 } 275 276 reg = hermes_read_regn(hw, EVSTAT); 277 k = CMD_COMPL_TIMEOUT; 278 while ((!(reg & HERMES_EV_CMD)) && k) { 279 k--; 280 udelay(10); 281 reg = hermes_read_regn(hw, EVSTAT); 282 } 283 284 if (!hermes_present(hw)) { 285 printk(KERN_WARNING "hermes @ %p: Card removed " 286 "while waiting for command 0x%04x completion.\n", 287 hw->iobase, cmd); 288 err = -ENODEV; 289 goto out; 290 } 291 292 if (!(reg & HERMES_EV_CMD)) { 293 printk(KERN_ERR "hermes @ %p: Timeout waiting for " 294 "command 0x%04x completion.\n", hw->iobase, cmd); 295 err = -ETIMEDOUT; 296 goto out; 297 } 298 299 status = hermes_read_regn(hw, STATUS); 300 if (resp) { 301 resp->status = status; 302 resp->resp0 = hermes_read_regn(hw, RESP0); 303 resp->resp1 = hermes_read_regn(hw, RESP1); 304 resp->resp2 = hermes_read_regn(hw, RESP2); 305 } 306 307 hermes_write_regn(hw, EVACK, HERMES_EV_CMD); 308 309 if (status & HERMES_STATUS_RESULT) 310 err = -EIO; 311 312 out: 313 return err; 314 } 315 316 static int hermes_allocate(struct hermes *hw, u16 size, u16 *fid) 317 { 318 int err = 0; 319 int k; 320 u16 reg; 321 322 if ((size < HERMES_ALLOC_LEN_MIN) || (size > HERMES_ALLOC_LEN_MAX)) 323 return -EINVAL; 324 325 err = hermes_docmd_wait(hw, HERMES_CMD_ALLOC, size, NULL); 326 if (err) 327 return err; 328 329 reg = hermes_read_regn(hw, EVSTAT); 330 k = ALLOC_COMPL_TIMEOUT; 331 while ((!(reg & HERMES_EV_ALLOC)) && k) { 332 k--; 333 udelay(10); 334 reg = hermes_read_regn(hw, EVSTAT); 335 } 336 337 if (!hermes_present(hw)) { 338 printk(KERN_WARNING "hermes @ %p: " 339 "Card removed waiting for frame allocation.\n", 340 hw->iobase); 341 return -ENODEV; 342 } 343 344 if (!(reg & HERMES_EV_ALLOC)) { 345 printk(KERN_ERR "hermes @ %p: " 346 "Timeout waiting for frame allocation\n", 347 hw->iobase); 348 return -ETIMEDOUT; 349 } 350 351 *fid = hermes_read_regn(hw, ALLOCFID); 352 hermes_write_regn(hw, EVACK, HERMES_EV_ALLOC); 353 354 return 0; 355 } 356 357 /* Set up a BAP to read a particular chunk of data from card's internal buffer. 358 * 359 * Returns: 360 * < 0 on internal failure (errno) 361 * 0 on success 362 * > 0 on error 363 * from firmware 364 * 365 * Callable from any context */ 366 static int hermes_bap_seek(struct hermes *hw, int bap, u16 id, u16 offset) 367 { 368 int sreg = bap ? HERMES_SELECT1 : HERMES_SELECT0; 369 int oreg = bap ? HERMES_OFFSET1 : HERMES_OFFSET0; 370 int k; 371 u16 reg; 372 373 /* Paranoia.. */ 374 if ((offset > HERMES_BAP_OFFSET_MAX) || (offset % 2)) 375 return -EINVAL; 376 377 k = HERMES_BAP_BUSY_TIMEOUT; 378 reg = hermes_read_reg(hw, oreg); 379 while ((reg & HERMES_OFFSET_BUSY) && k) { 380 k--; 381 udelay(1); 382 reg = hermes_read_reg(hw, oreg); 383 } 384 385 if (reg & HERMES_OFFSET_BUSY) 386 return -ETIMEDOUT; 387 388 /* Now we actually set up the transfer */ 389 hermes_write_reg(hw, sreg, id); 390 hermes_write_reg(hw, oreg, offset); 391 392 /* Wait for the BAP to be ready */ 393 k = HERMES_BAP_BUSY_TIMEOUT; 394 reg = hermes_read_reg(hw, oreg); 395 while ((reg & (HERMES_OFFSET_BUSY | HERMES_OFFSET_ERR)) && k) { 396 k--; 397 udelay(1); 398 reg = hermes_read_reg(hw, oreg); 399 } 400 401 if (reg != offset) { 402 printk(KERN_ERR "hermes @ %p: BAP%d offset %s: " 403 "reg=0x%x id=0x%x offset=0x%x\n", hw->iobase, bap, 404 (reg & HERMES_OFFSET_BUSY) ? "timeout" : "error", 405 reg, id, offset); 406 407 if (reg & HERMES_OFFSET_BUSY) 408 return -ETIMEDOUT; 409 410 return -EIO; /* error or wrong offset */ 411 } 412 413 return 0; 414 } 415 416 /* Read a block of data from the chip's buffer, via the 417 * BAP. Synchronization/serialization is the caller's problem. len 418 * must be even. 419 * 420 * Returns: 421 * < 0 on internal failure (errno) 422 * 0 on success 423 * > 0 on error from firmware 424 */ 425 static int hermes_bap_pread(struct hermes *hw, int bap, void *buf, int len, 426 u16 id, u16 offset) 427 { 428 int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; 429 int err = 0; 430 431 if ((len < 0) || (len % 2)) 432 return -EINVAL; 433 434 err = hermes_bap_seek(hw, bap, id, offset); 435 if (err) 436 goto out; 437 438 /* Actually do the transfer */ 439 hermes_read_words(hw, dreg, buf, len / 2); 440 441 out: 442 return err; 443 } 444 445 /* Write a block of data to the chip's buffer, via the 446 * BAP. Synchronization/serialization is the caller's problem. 447 * 448 * Returns: 449 * < 0 on internal failure (errno) 450 * 0 on success 451 * > 0 on error from firmware 452 */ 453 static int hermes_bap_pwrite(struct hermes *hw, int bap, const void *buf, 454 int len, u16 id, u16 offset) 455 { 456 int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; 457 int err = 0; 458 459 if (len < 0) 460 return -EINVAL; 461 462 err = hermes_bap_seek(hw, bap, id, offset); 463 if (err) 464 goto out; 465 466 /* Actually do the transfer */ 467 hermes_write_bytes(hw, dreg, buf, len); 468 469 out: 470 return err; 471 } 472 473 /* Read a Length-Type-Value record from the card. 474 * 475 * If length is NULL, we ignore the length read from the card, and 476 * read the entire buffer regardless. This is useful because some of 477 * the configuration records appear to have incorrect lengths in 478 * practice. 479 * 480 * Callable from user or bh context. */ 481 static int hermes_read_ltv(struct hermes *hw, int bap, u16 rid, 482 unsigned bufsize, u16 *length, void *buf) 483 { 484 int err = 0; 485 int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; 486 u16 rlength, rtype; 487 unsigned nwords; 488 489 if (bufsize % 2) 490 return -EINVAL; 491 492 err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS, rid, NULL); 493 if (err) 494 return err; 495 496 err = hermes_bap_seek(hw, bap, rid, 0); 497 if (err) 498 return err; 499 500 rlength = hermes_read_reg(hw, dreg); 501 502 if (!rlength) 503 return -ENODATA; 504 505 rtype = hermes_read_reg(hw, dreg); 506 507 if (length) 508 *length = rlength; 509 510 if (rtype != rid) 511 printk(KERN_WARNING "hermes @ %p: %s(): " 512 "rid (0x%04x) does not match type (0x%04x)\n", 513 hw->iobase, __func__, rid, rtype); 514 if (HERMES_RECLEN_TO_BYTES(rlength) > bufsize) 515 printk(KERN_WARNING "hermes @ %p: " 516 "Truncating LTV record from %d to %d bytes. " 517 "(rid=0x%04x, len=0x%04x)\n", hw->iobase, 518 HERMES_RECLEN_TO_BYTES(rlength), bufsize, rid, rlength); 519 520 nwords = min((unsigned)rlength - 1, bufsize / 2); 521 hermes_read_words(hw, dreg, buf, nwords); 522 523 return 0; 524 } 525 526 static int hermes_write_ltv(struct hermes *hw, int bap, u16 rid, 527 u16 length, const void *value) 528 { 529 int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; 530 int err = 0; 531 unsigned count; 532 533 if (length == 0) 534 return -EINVAL; 535 536 err = hermes_bap_seek(hw, bap, rid, 0); 537 if (err) 538 return err; 539 540 hermes_write_reg(hw, dreg, length); 541 hermes_write_reg(hw, dreg, rid); 542 543 count = length - 1; 544 545 hermes_write_bytes(hw, dreg, value, count << 1); 546 547 err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS | HERMES_CMD_WRITE, 548 rid, NULL); 549 550 return err; 551 } 552 553 /*** Hermes AUX control ***/ 554 555 static inline void 556 hermes_aux_setaddr(struct hermes *hw, u32 addr) 557 { 558 hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7)); 559 hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F)); 560 } 561 562 static inline int 563 hermes_aux_control(struct hermes *hw, int enabled) 564 { 565 int desired_state = enabled ? HERMES_AUX_ENABLED : HERMES_AUX_DISABLED; 566 int action = enabled ? HERMES_AUX_ENABLE : HERMES_AUX_DISABLE; 567 int i; 568 569 /* Already open? */ 570 if (hermes_read_reg(hw, HERMES_CONTROL) == desired_state) 571 return 0; 572 573 hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0); 574 hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1); 575 hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2); 576 hermes_write_reg(hw, HERMES_CONTROL, action); 577 578 for (i = 0; i < 20; i++) { 579 udelay(10); 580 if (hermes_read_reg(hw, HERMES_CONTROL) == 581 desired_state) 582 return 0; 583 } 584 585 return -EBUSY; 586 } 587 588 /*** Hermes programming ***/ 589 590 /* About to start programming data (Hermes I) 591 * offset is the entry point 592 * 593 * Spectrum_cs' Symbol fw does not require this 594 * wl_lkm Agere fw does 595 * Don't know about intersil 596 */ 597 static int hermesi_program_init(struct hermes *hw, u32 offset) 598 { 599 int err; 600 601 /* Disable interrupts?*/ 602 /*hw->inten = 0x0;*/ 603 /*hermes_write_regn(hw, INTEN, 0);*/ 604 /*hermes_set_irqmask(hw, 0);*/ 605 606 /* Acknowledge any outstanding command */ 607 hermes_write_regn(hw, EVACK, 0xFFFF); 608 609 /* Using init_cmd_wait rather than cmd_wait */ 610 err = hw->ops->init_cmd_wait(hw, 611 0x0100 | HERMES_CMD_INIT, 612 0, 0, 0, NULL); 613 if (err) 614 return err; 615 616 err = hw->ops->init_cmd_wait(hw, 617 0x0000 | HERMES_CMD_INIT, 618 0, 0, 0, NULL); 619 if (err) 620 return err; 621 622 err = hermes_aux_control(hw, 1); 623 pr_debug("AUX enable returned %d\n", err); 624 625 if (err) 626 return err; 627 628 pr_debug("Enabling volatile, EP 0x%08x\n", offset); 629 err = hw->ops->init_cmd_wait(hw, 630 HERMES_PROGRAM_ENABLE_VOLATILE, 631 offset & 0xFFFFu, 632 offset >> 16, 633 0, 634 NULL); 635 pr_debug("PROGRAM_ENABLE returned %d\n", err); 636 637 return err; 638 } 639 640 /* Done programming data (Hermes I) 641 * 642 * Spectrum_cs' Symbol fw does not require this 643 * wl_lkm Agere fw does 644 * Don't know about intersil 645 */ 646 static int hermesi_program_end(struct hermes *hw) 647 { 648 struct hermes_response resp; 649 int rc = 0; 650 int err; 651 652 rc = hw->ops->cmd_wait(hw, HERMES_PROGRAM_DISABLE, 0, &resp); 653 654 pr_debug("PROGRAM_DISABLE returned %d, " 655 "r0 0x%04x, r1 0x%04x, r2 0x%04x\n", 656 rc, resp.resp0, resp.resp1, resp.resp2); 657 658 if ((rc == 0) && 659 ((resp.status & HERMES_STATUS_CMDCODE) != HERMES_CMD_DOWNLD)) 660 rc = -EIO; 661 662 err = hermes_aux_control(hw, 0); 663 pr_debug("AUX disable returned %d\n", err); 664 665 /* Acknowledge any outstanding command */ 666 hermes_write_regn(hw, EVACK, 0xFFFF); 667 668 /* Reinitialise, ignoring return */ 669 (void) hw->ops->init_cmd_wait(hw, 0x0000 | HERMES_CMD_INIT, 670 0, 0, 0, NULL); 671 672 return rc ? rc : err; 673 } 674 675 static int hermes_program_bytes(struct hermes *hw, const char *data, 676 u32 addr, u32 len) 677 { 678 /* wl lkm splits the programming into chunks of 2000 bytes. 679 * This restriction appears to come from USB. The PCMCIA 680 * adapters can program the whole lot in one go */ 681 hermes_aux_setaddr(hw, addr); 682 hermes_write_bytes(hw, HERMES_AUXDATA, data, len); 683 return 0; 684 } 685 686 /* Read PDA from the adapter */ 687 static int hermes_read_pda(struct hermes *hw, __le16 *pda, u32 pda_addr, 688 u16 pda_len) 689 { 690 int ret; 691 u16 pda_size; 692 u16 data_len = pda_len; 693 __le16 *data = pda; 694 695 if (hw->eeprom_pda) { 696 /* PDA of spectrum symbol is in eeprom */ 697 698 /* Issue command to read EEPROM */ 699 ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL); 700 if (ret) 701 return ret; 702 } else { 703 /* wl_lkm does not include PDA size in the PDA area. 704 * We will pad the information into pda, so other routines 705 * don't have to be modified */ 706 pda[0] = cpu_to_le16(pda_len - 2); 707 /* Includes CFG_PROD_DATA but not itself */ 708 pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */ 709 data_len = pda_len - 4; 710 data = pda + 2; 711 } 712 713 /* Open auxiliary port */ 714 ret = hermes_aux_control(hw, 1); 715 pr_debug("AUX enable returned %d\n", ret); 716 if (ret) 717 return ret; 718 719 /* Read PDA */ 720 hermes_aux_setaddr(hw, pda_addr); 721 hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2); 722 723 /* Close aux port */ 724 ret = hermes_aux_control(hw, 0); 725 pr_debug("AUX disable returned %d\n", ret); 726 727 /* Check PDA length */ 728 pda_size = le16_to_cpu(pda[0]); 729 pr_debug("Actual PDA length %d, Max allowed %d\n", 730 pda_size, pda_len); 731 if (pda_size > pda_len) 732 return -EINVAL; 733 734 return 0; 735 } 736 737 static void hermes_lock_irqsave(spinlock_t *lock, 738 unsigned long *flags) __acquires(lock) 739 { 740 spin_lock_irqsave(lock, *flags); 741 } 742 743 static void hermes_unlock_irqrestore(spinlock_t *lock, 744 unsigned long *flags) __releases(lock) 745 { 746 spin_unlock_irqrestore(lock, *flags); 747 } 748 749 static void hermes_lock_irq(spinlock_t *lock) __acquires(lock) 750 { 751 spin_lock_irq(lock); 752 } 753 754 static void hermes_unlock_irq(spinlock_t *lock) __releases(lock) 755 { 756 spin_unlock_irq(lock); 757 } 758 759 /* Hermes operations for local buses */ 760 static const struct hermes_ops hermes_ops_local = { 761 .init = hermes_init, 762 .cmd_wait = hermes_docmd_wait, 763 .init_cmd_wait = hermes_doicmd_wait, 764 .allocate = hermes_allocate, 765 .read_ltv = hermes_read_ltv, 766 .read_ltv_pr = hermes_read_ltv, 767 .write_ltv = hermes_write_ltv, 768 .bap_pread = hermes_bap_pread, 769 .bap_pwrite = hermes_bap_pwrite, 770 .read_pda = hermes_read_pda, 771 .program_init = hermesi_program_init, 772 .program_end = hermesi_program_end, 773 .program = hermes_program_bytes, 774 .lock_irqsave = hermes_lock_irqsave, 775 .unlock_irqrestore = hermes_unlock_irqrestore, 776 .lock_irq = hermes_lock_irq, 777 .unlock_irq = hermes_unlock_irq, 778 }; 779