summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/intersil/orinoco/hermes.c
blob: 43790fbea0e00ab6c7d292ee71d9209e9cf36ba5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
/* hermes.c
 *
 * Driver core for the "Hermes" wireless MAC controller, as used in
 * the Lucent Orinoco and Cabletron RoamAbout cards. It should also
 * work on the hfa3841 and hfa3842 MAC controller chips used in the
 * Prism II chipsets.
 *
 * This is not a complete driver, just low-level access routines for
 * the MAC controller itself.
 *
 * Based on the prism2 driver from Absolute Value Systems' linux-wlan
 * project, the Linux wvlan_cs driver, Lucent's HCF-Light
 * (wvlan_hcf.c) library, and the NetBSD wireless driver (in no
 * particular order).
 *
 * Copyright (C) 2000, David Gibson, Linuxcare Australia.
 * (C) Copyright David Gibson, IBM Corp. 2001-2003.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License version 2 (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of the
 * above.  If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the GPL.  If you do not delete the
 * provisions above, a recipient may use your version of this file
 * under either the MPL or the GPL.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>

#include "hermes.h"

/* These are maximum timeouts. Most often, card wil react much faster */
#define CMD_BUSY_TIMEOUT (100) /* In iterations of ~1us */
#define CMD_INIT_TIMEOUT (50000) /* in iterations of ~10us */
#define CMD_COMPL_TIMEOUT (20000) /* in iterations of ~10us */
#define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */

/*
 * AUX port access.  To unlock the AUX port write the access keys to the
 * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL
 * register.  Then read it and make sure it's HERMES_AUX_ENABLED.
 */
#define HERMES_AUX_ENABLE	0x8000	/* Enable auxiliary port access */
#define HERMES_AUX_DISABLE	0x4000	/* Disable to auxiliary port access */
#define HERMES_AUX_ENABLED	0xC000	/* Auxiliary port is open */
#define HERMES_AUX_DISABLED	0x0000	/* Auxiliary port is closed */

#define HERMES_AUX_PW0	0xFE01
#define HERMES_AUX_PW1	0xDC23
#define HERMES_AUX_PW2	0xBA45

/* HERMES_CMD_DOWNLD */
#define HERMES_PROGRAM_DISABLE             (0x0000 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_ENABLE_VOLATILE     (0x0100 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_ENABLE_NON_VOLATILE (0x0200 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_NON_VOLATILE        (0x0300 | HERMES_CMD_DOWNLD)

/*
 * Debugging helpers
 */

#define DMSG(stuff...) do {printk(KERN_DEBUG "hermes @ %p: " , hw->iobase); \
			printk(stuff); } while (0)

#undef HERMES_DEBUG
#ifdef HERMES_DEBUG
#include <stdarg.h>

#define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff)

#else /* ! HERMES_DEBUG */

#define DEBUG(lvl, stuff...) do { } while (0)

#endif /* ! HERMES_DEBUG */

static const struct hermes_ops hermes_ops_local;

/*
 * Internal functions
 */

/* Issue a command to the chip. Waiting for it to complete is the caller's
   problem.

   Returns -EBUSY if the command register is busy, 0 on success.

   Callable from any context.
*/
static int hermes_issue_cmd(struct hermes *hw, u16 cmd, u16 param0,
			    u16 param1, u16 param2)
{
	int k = CMD_BUSY_TIMEOUT;
	u16 reg;

	/* First wait for the command register to unbusy */
	reg = hermes_read_regn(hw, CMD);
	while ((reg & HERMES_CMD_BUSY) && k) {
		k--;
		udelay(1);
		reg = hermes_read_regn(hw, CMD);
	}
	if (reg & HERMES_CMD_BUSY)
		return -EBUSY;

	hermes_write_regn(hw, PARAM2, param2);
	hermes_write_regn(hw, PARAM1, param1);
	hermes_write_regn(hw, PARAM0, param0);
	hermes_write_regn(hw, CMD, cmd);

	return 0;
}

/*
 * Function definitions
 */

/* For doing cmds that wipe the magic constant in SWSUPPORT0 */
static int hermes_doicmd_wait(struct hermes *hw, u16 cmd,
			      u16 parm0, u16 parm1, u16 parm2,
			      struct hermes_response *resp)
{
	int err = 0;
	int k;
	u16 status, reg;

	err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2);
	if (err)
		return err;

	reg = hermes_read_regn(hw, EVSTAT);
	k = CMD_INIT_TIMEOUT;
	while ((!(reg & HERMES_EV_CMD)) && k) {
		k--;
		udelay(10);
		reg = hermes_read_regn(hw, EVSTAT);
	}

	hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);

	if (!hermes_present(hw)) {
		DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n",
		       hw->iobase);
		err = -ENODEV;
		goto out;
	}

	if (!(reg & HERMES_EV_CMD)) {
		printk(KERN_ERR "hermes @ %p: "
		       "Timeout waiting for card to reset (reg=0x%04x)!\n",
		       hw->iobase, reg);
		err = -ETIMEDOUT;
		goto out;
	}

	status = hermes_read_regn(hw, STATUS);
	if (resp) {
		resp->status = status;
		resp->resp0 = hermes_read_regn(hw, RESP0);
		resp->resp1 = hermes_read_regn(hw, RESP1);
		resp->resp2 = hermes_read_regn(hw, RESP2);
	}

	hermes_write_regn(hw, EVACK, HERMES_EV_CMD);

	if (status & HERMES_STATUS_RESULT)
		err = -EIO;
out:
	return err;
}

void hermes_struct_init(struct hermes *hw, void __iomem *address,
			int reg_spacing)
{
	hw->iobase = address;
	hw->reg_spacing = reg_spacing;
	hw->inten = 0x0;
	hw->eeprom_pda = false;
	hw->ops = &hermes_ops_local;
}
EXPORT_SYMBOL(hermes_struct_init);

static int hermes_init(struct hermes *hw)
{
	u16 reg;
	int err = 0;
	int k;

	/* We don't want to be interrupted while resetting the chipset */
	hw->inten = 0x0;
	hermes_write_regn(hw, INTEN, 0);
	hermes_write_regn(hw, EVACK, 0xffff);

	/* Normally it's a "can't happen" for the command register to
	   be busy when we go to issue a command because we are
	   serializing all commands.  However we want to have some
	   chance of resetting the card even if it gets into a stupid
	   state, so we actually wait to see if the command register
	   will unbusy itself here. */
	k = CMD_BUSY_TIMEOUT;
	reg = hermes_read_regn(hw, CMD);
	while (k && (reg & HERMES_CMD_BUSY)) {
		if (reg == 0xffff) /* Special case - the card has probably been
				      removed, so don't wait for the timeout */
			return -ENODEV;

		k--;
		udelay(1);
		reg = hermes_read_regn(hw, CMD);
	}

	/* No need to explicitly handle the timeout - if we've timed
	   out hermes_issue_cmd() will probably return -EBUSY below */

	/* According to the documentation, EVSTAT may contain
	   obsolete event occurrence information.  We have to acknowledge
	   it by writing EVACK. */
	reg = hermes_read_regn(hw, EVSTAT);
	hermes_write_regn(hw, EVACK, reg);

	/* We don't use hermes_docmd_wait here, because the reset wipes
	   the magic constant in SWSUPPORT0 away, and it gets confused */
	err = hermes_doicmd_wait(hw, HERMES_CMD_INIT, 0, 0, 0, NULL);

	return err;
}

/* Issue a command to the chip, and (busy!) wait for it to
 * complete.
 *
 * Returns:
 *     < 0 on internal error
 *       0 on success
 *     > 0 on error returned by the firmware
 *
 * Callable from any context, but locking is your problem. */
static int hermes_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0,
			     struct hermes_response *resp)
{
	int err;
	int k;
	u16 reg;
	u16 status;

	err = hermes_issue_cmd(hw, cmd, parm0, 0, 0);
	if (err) {
		if (!hermes_present(hw)) {
			if (net_ratelimit())
				printk(KERN_WARNING "hermes @ %p: "
				       "Card removed while issuing command "
				       "0x%04x.\n", hw->iobase, cmd);
			err = -ENODEV;
		} else
			if (net_ratelimit())
				printk(KERN_ERR "hermes @ %p: "
				       "Error %d issuing command 0x%04x.\n",
				       hw->iobase, err, cmd);
		goto out;
	}

	reg = hermes_read_regn(hw, EVSTAT);
	k = CMD_COMPL_TIMEOUT;
	while ((!(reg & HERMES_EV_CMD)) && k) {
		k--;
		udelay(10);
		reg = hermes_read_regn(hw, EVSTAT);
	}

	if (!hermes_present(hw)) {
		printk(KERN_WARNING "hermes @ %p: Card removed "
		       "while waiting for command 0x%04x completion.\n",
		       hw->iobase, cmd);
		err = -ENODEV;
		goto out;
	}

	if (!(reg & HERMES_EV_CMD)) {
		printk(KERN_ERR "hermes @ %p: Timeout waiting for "
		       "command 0x%04x completion.\n", hw->iobase, cmd);
		err = -ETIMEDOUT;
		goto out;
	}

	status = hermes_read_regn(hw, STATUS);
	if (resp) {
		resp->status = status;
		resp->resp0 = hermes_read_regn(hw, RESP0);
		resp->resp1 = hermes_read_regn(hw, RESP1);
		resp->resp2 = hermes_read_regn(hw, RESP2);
	}

	hermes_write_regn(hw, EVACK, HERMES_EV_CMD);

	if (status & HERMES_STATUS_RESULT)
		err = -EIO;

 out:
	return err;
}

static int hermes_allocate(struct hermes *hw, u16 size, u16 *fid)
{
	int err = 0;
	int k;
	u16 reg;

	if ((size < HERMES_ALLOC_LEN_MIN) || (size > HERMES_ALLOC_LEN_MAX))
		return -EINVAL;

	err = hermes_docmd_wait(hw, HERMES_CMD_ALLOC, size, NULL);
	if (err)
		return err;

	reg = hermes_read_regn(hw, EVSTAT);
	k = ALLOC_COMPL_TIMEOUT;
	while ((!(reg & HERMES_EV_ALLOC)) && k) {
		k--;
		udelay(10);
		reg = hermes_read_regn(hw, EVSTAT);
	}

	if (!hermes_present(hw)) {
		printk(KERN_WARNING "hermes @ %p: "
		       "Card removed waiting for frame allocation.\n",
		       hw->iobase);
		return -ENODEV;
	}

	if (!(reg & HERMES_EV_ALLOC)) {
		printk(KERN_ERR "hermes @ %p: "
		       "Timeout waiting for frame allocation\n",
		       hw->iobase);
		return -ETIMEDOUT;
	}

	*fid = hermes_read_regn(hw, ALLOCFID);
	hermes_write_regn(hw, EVACK, HERMES_EV_ALLOC);

	return 0;
}

/* Set up a BAP to read a particular chunk of data from card's internal buffer.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error
 * from firmware
 *
 * Callable from any context */
static int hermes_bap_seek(struct hermes *hw, int bap, u16 id, u16 offset)
{
	int sreg = bap ? HERMES_SELECT1 : HERMES_SELECT0;
	int oreg = bap ? HERMES_OFFSET1 : HERMES_OFFSET0;
	int k;
	u16 reg;

	/* Paranoia.. */
	if ((offset > HERMES_BAP_OFFSET_MAX) || (offset % 2))
		return -EINVAL;

	k = HERMES_BAP_BUSY_TIMEOUT;
	reg = hermes_read_reg(hw, oreg);
	while ((reg & HERMES_OFFSET_BUSY) && k) {
		k--;
		udelay(1);
		reg = hermes_read_reg(hw, oreg);
	}

	if (reg & HERMES_OFFSET_BUSY)
		return -ETIMEDOUT;

	/* Now we actually set up the transfer */
	hermes_write_reg(hw, sreg, id);
	hermes_write_reg(hw, oreg, offset);

	/* Wait for the BAP to be ready */
	k = HERMES_BAP_BUSY_TIMEOUT;
	reg = hermes_read_reg(hw, oreg);
	while ((reg & (HERMES_OFFSET_BUSY | HERMES_OFFSET_ERR)) && k) {
		k--;
		udelay(1);
		reg = hermes_read_reg(hw, oreg);
	}

	if (reg != offset) {
		printk(KERN_ERR "hermes @ %p: BAP%d offset %s: "
		       "reg=0x%x id=0x%x offset=0x%x\n", hw->iobase, bap,
		       (reg & HERMES_OFFSET_BUSY) ? "timeout" : "error",
		       reg, id, offset);

		if (reg & HERMES_OFFSET_BUSY)
			return -ETIMEDOUT;

		return -EIO;		/* error or wrong offset */
	}

	return 0;
}

/* Read a block of data from the chip's buffer, via the
 * BAP. Synchronization/serialization is the caller's problem.  len
 * must be even.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error from firmware
 */
static int hermes_bap_pread(struct hermes *hw, int bap, void *buf, int len,
			    u16 id, u16 offset)
{
	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
	int err = 0;

	if ((len < 0) || (len % 2))
		return -EINVAL;

	err = hermes_bap_seek(hw, bap, id, offset);
	if (err)
		goto out;

	/* Actually do the transfer */
	hermes_read_words(hw, dreg, buf, len / 2);

 out:
	return err;
}

/* Write a block of data to the chip's buffer, via the
 * BAP. Synchronization/serialization is the caller's problem.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error from firmware
 */
static int hermes_bap_pwrite(struct hermes *hw, int bap, const void *buf,
			     int len, u16 id, u16 offset)
{
	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
	int err = 0;

	if (len < 0)
		return -EINVAL;

	err = hermes_bap_seek(hw, bap, id, offset);
	if (err)
		goto out;

	/* Actually do the transfer */
	hermes_write_bytes(hw, dreg, buf, len);

 out:
	return err;
}

/* Read a Length-Type-Value record from the card.
 *
 * If length is NULL, we ignore the length read from the card, and
 * read the entire buffer regardless. This is useful because some of
 * the configuration records appear to have incorrect lengths in
 * practice.
 *
 * Callable from user or bh context.  */
static int hermes_read_ltv(struct hermes *hw, int bap, u16 rid,
			   unsigned bufsize, u16 *length, void *buf)
{
	int err = 0;
	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
	u16 rlength, rtype;
	unsigned nwords;

	if (bufsize % 2)
		return -EINVAL;

	err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS, rid, NULL);
	if (err)
		return err;

	err = hermes_bap_seek(hw, bap, rid, 0);
	if (err)
		return err;

	rlength = hermes_read_reg(hw, dreg);

	if (!rlength)
		return -ENODATA;

	rtype = hermes_read_reg(hw, dreg);

	if (length)
		*length = rlength;

	if (rtype != rid)
		printk(KERN_WARNING "hermes @ %p: %s(): "
		       "rid (0x%04x) does not match type (0x%04x)\n",
		       hw->iobase, __func__, rid, rtype);
	if (HERMES_RECLEN_TO_BYTES(rlength) > bufsize)
		printk(KERN_WARNING "hermes @ %p: "
		       "Truncating LTV record from %d to %d bytes. "
		       "(rid=0x%04x, len=0x%04x)\n", hw->iobase,
		       HERMES_RECLEN_TO_BYTES(rlength), bufsize, rid, rlength);

	nwords = min((unsigned)rlength - 1, bufsize / 2);
	hermes_read_words(hw, dreg, buf, nwords);

	return 0;
}

static int hermes_write_ltv(struct hermes *hw, int bap, u16 rid,
			    u16 length, const void *value)
{
	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
	int err = 0;
	unsigned count;

	if (length == 0)
		return -EINVAL;

	err = hermes_bap_seek(hw, bap, rid, 0);
	if (err)
		return err;

	hermes_write_reg(hw, dreg, length);
	hermes_write_reg(hw, dreg, rid);

	count = length - 1;

	hermes_write_bytes(hw, dreg, value, count << 1);

	err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS | HERMES_CMD_WRITE,
				rid, NULL);

	return err;
}

/*** Hermes AUX control ***/

static inline void
hermes_aux_setaddr(struct hermes *hw, u32 addr)
{
	hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7));
	hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F));
}

static inline int
hermes_aux_control(struct hermes *hw, int enabled)
{
	int desired_state = enabled ? HERMES_AUX_ENABLED : HERMES_AUX_DISABLED;
	int action = enabled ? HERMES_AUX_ENABLE : HERMES_AUX_DISABLE;
	int i;

	/* Already open? */
	if (hermes_read_reg(hw, HERMES_CONTROL) == desired_state)
		return 0;

	hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0);
	hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1);
	hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2);
	hermes_write_reg(hw, HERMES_CONTROL, action);

	for (i = 0; i < 20; i++) {
		udelay(10);
		if (hermes_read_reg(hw, HERMES_CONTROL) ==
		    desired_state)
			return 0;
	}

	return -EBUSY;
}

/*** Hermes programming ***/

/* About to start programming data (Hermes I)
 * offset is the entry point
 *
 * Spectrum_cs' Symbol fw does not require this
 * wl_lkm Agere fw does
 * Don't know about intersil
 */
static int hermesi_program_init(struct hermes *hw, u32 offset)
{
	int err;

	/* Disable interrupts?*/
	/*hw->inten = 0x0;*/
	/*hermes_write_regn(hw, INTEN, 0);*/
	/*hermes_set_irqmask(hw, 0);*/

	/* Acknowledge any outstanding command */
	hermes_write_regn(hw, EVACK, 0xFFFF);

	/* Using init_cmd_wait rather than cmd_wait */
	err = hw->ops->init_cmd_wait(hw,
				     0x0100 | HERMES_CMD_INIT,
				     0, 0, 0, NULL);
	if (err)
		return err;

	err = hw->ops->init_cmd_wait(hw,
				     0x0000 | HERMES_CMD_INIT,
				     0, 0, 0, NULL);
	if (err)
		return err;

	err = hermes_aux_control(hw, 1);
	pr_debug("AUX enable returned %d\n", err);

	if (err)
		return err;

	pr_debug("Enabling volatile, EP 0x%08x\n", offset);
	err = hw->ops->init_cmd_wait(hw,
				     HERMES_PROGRAM_ENABLE_VOLATILE,
				     offset & 0xFFFFu,
				     offset >> 16,
				     0,
				     NULL);
	pr_debug("PROGRAM_ENABLE returned %d\n", err);

	return err;
}

/* Done programming data (Hermes I)
 *
 * Spectrum_cs' Symbol fw does not require this
 * wl_lkm Agere fw does
 * Don't know about intersil
 */
static int hermesi_program_end(struct hermes *hw)
{
	struct hermes_response resp;
	int rc = 0;
	int err;

	rc = hw->ops->cmd_wait(hw, HERMES_PROGRAM_DISABLE, 0, &resp);

	pr_debug("PROGRAM_DISABLE returned %d, "
		 "r0 0x%04x, r1 0x%04x, r2 0x%04x\n",
		 rc, resp.resp0, resp.resp1, resp.resp2);

	if ((rc == 0) &&
	    ((resp.status & HERMES_STATUS_CMDCODE) != HERMES_CMD_DOWNLD))
		rc = -EIO;

	err = hermes_aux_control(hw, 0);
	pr_debug("AUX disable returned %d\n", err);

	/* Acknowledge any outstanding command */
	hermes_write_regn(hw, EVACK, 0xFFFF);

	/* Reinitialise, ignoring return */
	(void) hw->ops->init_cmd_wait(hw, 0x0000 | HERMES_CMD_INIT,
				      0, 0, 0, NULL);

	return rc ? rc : err;
}

static int hermes_program_bytes(struct hermes *hw, const char *data,
				u32 addr, u32 len)
{
	/* wl lkm splits the programming into chunks of 2000 bytes.
	 * This restriction appears to come from USB. The PCMCIA
	 * adapters can program the whole lot in one go */
	hermes_aux_setaddr(hw, addr);
	hermes_write_bytes(hw, HERMES_AUXDATA, data, len);
	return 0;
}

/* Read PDA from the adapter */
static int hermes_read_pda(struct hermes *hw, __le16 *pda, u32 pda_addr,
			   u16 pda_len)
{
	int ret;
	u16 pda_size;
	u16 data_len = pda_len;
	__le16 *data = pda;

	if (hw->eeprom_pda) {
		/* PDA of spectrum symbol is in eeprom */

		/* Issue command to read EEPROM */
		ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL);
		if (ret)
			return ret;
	} else {
		/* wl_lkm does not include PDA size in the PDA area.
		 * We will pad the information into pda, so other routines
		 * don't have to be modified */
		pda[0] = cpu_to_le16(pda_len - 2);
			/* Includes CFG_PROD_DATA but not itself */
		pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
		data_len = pda_len - 4;
		data = pda + 2;
	}

	/* Open auxiliary port */
	ret = hermes_aux_control(hw, 1);
	pr_debug("AUX enable returned %d\n", ret);
	if (ret)
		return ret;

	/* Read PDA */
	hermes_aux_setaddr(hw, pda_addr);
	hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2);

	/* Close aux port */
	ret = hermes_aux_control(hw, 0);
	pr_debug("AUX disable returned %d\n", ret);

	/* Check PDA length */
	pda_size = le16_to_cpu(pda[0]);
	pr_debug("Actual PDA length %d, Max allowed %d\n",
		 pda_size, pda_len);
	if (pda_size > pda_len)
		return -EINVAL;

	return 0;
}

static void hermes_lock_irqsave(spinlock_t *lock,
				unsigned long *flags) __acquires(lock)
{
	spin_lock_irqsave(lock, *flags);
}

static void hermes_unlock_irqrestore(spinlock_t *lock,
				     unsigned long *flags) __releases(lock)
{
	spin_unlock_irqrestore(lock, *flags);
}

static void hermes_lock_irq(spinlock_t *lock) __acquires(lock)
{
	spin_lock_irq(lock);
}

static void hermes_unlock_irq(spinlock_t *lock) __releases(lock)
{
	spin_unlock_irq(lock);
}

/* Hermes operations for local buses */
static const struct hermes_ops hermes_ops_local = {
	.init = hermes_init,
	.cmd_wait = hermes_docmd_wait,
	.init_cmd_wait = hermes_doicmd_wait,
	.allocate = hermes_allocate,
	.read_ltv = hermes_read_ltv,
	.write_ltv = hermes_write_ltv,
	.bap_pread = hermes_bap_pread,
	.bap_pwrite = hermes_bap_pwrite,
	.read_pda = hermes_read_pda,
	.program_init = hermesi_program_init,
	.program_end = hermesi_program_end,
	.program = hermes_program_bytes,
	.lock_irqsave = hermes_lock_irqsave,
	.unlock_irqrestore = hermes_unlock_irqrestore,
	.lock_irq = hermes_lock_irq,
	.unlock_irq = hermes_unlock_irq,
};