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/module.h> 42#include <linux/kernel.h> 43#include <linux/init.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#include <stdarg.h> 84 85#define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff) 86 87#else /* ! HERMES_DEBUG */ 88 89#define DEBUG(lvl, stuff...) do { } while (0) 90 91#endif /* ! HERMES_DEBUG */ 92 93static const struct hermes_ops hermes_ops_local; 94 95/* 96 * Internal functions 97 */ 98 99/* Issue a command to the chip. Waiting for it to complete is the caller's 100 problem. 101 102 Returns -EBUSY if the command register is busy, 0 on success. 103 104 Callable from any context. 105*/ 106static int hermes_issue_cmd(hermes_t *hw, u16 cmd, u16 param0, 107 u16 param1, u16 param2) 108{ 109 int k = CMD_BUSY_TIMEOUT; 110 u16 reg; 111 112 /* First wait for the command register to unbusy */ 113 reg = hermes_read_regn(hw, CMD); 114 while ((reg & HERMES_CMD_BUSY) && k) { 115 k--; 116 udelay(1); 117 reg = hermes_read_regn(hw, CMD); 118 } 119 if (reg & HERMES_CMD_BUSY) 120 return -EBUSY; 121 122 hermes_write_regn(hw, PARAM2, param2); 123 hermes_write_regn(hw, PARAM1, param1); 124 hermes_write_regn(hw, PARAM0, param0); 125 hermes_write_regn(hw, CMD, cmd); 126 127 return 0; 128} 129 130/* 131 * Function definitions 132 */ 133 134/* For doing cmds that wipe the magic constant in SWSUPPORT0 */ 135static int hermes_doicmd_wait(hermes_t *hw, u16 cmd, 136 u16 parm0, u16 parm1, u16 parm2, 137 struct hermes_response *resp) 138{ 139 int err = 0; 140 int k; 141 u16 status, reg; 142 143 err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2); 144 if (err) 145 return err; 146 147 reg = hermes_read_regn(hw, EVSTAT); 148 k = CMD_INIT_TIMEOUT; 149 while ((!(reg & HERMES_EV_CMD)) && k) { 150 k--; 151 udelay(10); 152 reg = hermes_read_regn(hw, EVSTAT); 153 } 154 155 hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC); 156 157 if (!hermes_present(hw)) { 158 DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n", 159 hw->iobase); 160 err = -ENODEV; 161 goto out; 162 } 163 164 if (!(reg & HERMES_EV_CMD)) { 165 printk(KERN_ERR "hermes @ %p: " 166 "Timeout waiting for card to reset (reg=0x%04x)!\n", 167 hw->iobase, reg); 168 err = -ETIMEDOUT; 169 goto out; 170 } 171 172 status = hermes_read_regn(hw, STATUS); 173 if (resp) { 174 resp->status = status; 175 resp->resp0 = hermes_read_regn(hw, RESP0); 176 resp->resp1 = hermes_read_regn(hw, RESP1); 177 resp->resp2 = hermes_read_regn(hw, RESP2); 178 } 179 180 hermes_write_regn(hw, EVACK, HERMES_EV_CMD); 181 182 if (status & HERMES_STATUS_RESULT) 183 err = -EIO; 184out: 185 return err; 186} 187 188void hermes_struct_init(hermes_t *hw, void __iomem *address, 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} 196EXPORT_SYMBOL(hermes_struct_init); 197 198static int hermes_init(hermes_t *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. */ 252static int hermes_docmd_wait(hermes_t *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 316static int hermes_allocate(hermes_t *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 */ 366static int hermes_bap_seek(hermes_t *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 */ 425static int hermes_bap_pread(hermes_t *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 */ 453static int hermes_bap_pwrite(hermes_t *hw, int bap, const void *buf, int len, 454 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. */ 481static int hermes_read_ltv(hermes_t *hw, int bap, u16 rid, unsigned bufsize, 482 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 526static int hermes_write_ltv(hermes_t *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 555static inline void 556hermes_aux_setaddr(hermes_t *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 562static inline int 563hermes_aux_control(hermes_t *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 */ 597static int hermesi_program_init(hermes_t *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 */ 646static int hermesi_program_end(hermes_t *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 675static 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 */ 687static int hermes_read_pda(hermes_t *hw, __le16 *pda, u32 pda_addr, u16 pda_len) 688{ 689 int ret; 690 u16 pda_size; 691 u16 data_len = pda_len; 692 __le16 *data = pda; 693 694 if (hw->eeprom_pda) { 695 /* PDA of spectrum symbol is in eeprom */ 696 697 /* Issue command to read EEPROM */ 698 ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL); 699 if (ret) 700 return ret; 701 } else { 702 /* wl_lkm does not include PDA size in the PDA area. 703 * We will pad the information into pda, so other routines 704 * don't have to be modified */ 705 pda[0] = cpu_to_le16(pda_len - 2); 706 /* Includes CFG_PROD_DATA but not itself */ 707 pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */ 708 data_len = pda_len - 4; 709 data = pda + 2; 710 } 711 712 /* Open auxiliary port */ 713 ret = hermes_aux_control(hw, 1); 714 pr_debug("AUX enable returned %d\n", ret); 715 if (ret) 716 return ret; 717 718 /* Read PDA */ 719 hermes_aux_setaddr(hw, pda_addr); 720 hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2); 721 722 /* Close aux port */ 723 ret = hermes_aux_control(hw, 0); 724 pr_debug("AUX disable returned %d\n", ret); 725 726 /* Check PDA length */ 727 pda_size = le16_to_cpu(pda[0]); 728 pr_debug("Actual PDA length %d, Max allowed %d\n", 729 pda_size, pda_len); 730 if (pda_size > pda_len) 731 return -EINVAL; 732 733 return 0; 734} 735 736static void hermes_lock_irqsave(spinlock_t *lock, 737 unsigned long *flags) __acquires(lock) 738{ 739 spin_lock_irqsave(lock, *flags); 740} 741 742static void hermes_unlock_irqrestore(spinlock_t *lock, 743 unsigned long *flags) __releases(lock) 744{ 745 spin_unlock_irqrestore(lock, *flags); 746} 747 748static void hermes_lock_irq(spinlock_t *lock) __acquires(lock) 749{ 750 spin_lock_irq(lock); 751} 752 753static void hermes_unlock_irq(spinlock_t *lock) __releases(lock) 754{ 755 spin_unlock_irq(lock); 756} 757 758/* Hermes operations for local buses */ 759static const struct hermes_ops hermes_ops_local = { 760 .init = hermes_init, 761 .cmd_wait = hermes_docmd_wait, 762 .init_cmd_wait = hermes_doicmd_wait, 763 .allocate = hermes_allocate, 764 .read_ltv = hermes_read_ltv, 765 .write_ltv = hermes_write_ltv, 766 .bap_pread = hermes_bap_pread, 767 .bap_pwrite = hermes_bap_pwrite, 768 .read_pda = hermes_read_pda, 769 .program_init = hermesi_program_init, 770 .program_end = hermesi_program_end, 771 .program = hermes_program_bytes, 772 .lock_irqsave = hermes_lock_irqsave, 773 .unlock_irqrestore = hermes_unlock_irqrestore, 774 .lock_irq = hermes_lock_irq, 775 .unlock_irq = hermes_unlock_irq, 776}; 777