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