aboutsummaryrefslogtreecommitdiff
path: root/drivers/ssb/pcmcia.c
blob: 45502098e0c785defeb98ceafe304edad14571f1 (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
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
/*
 * Sonics Silicon Backplane
 * PCMCIA-Hostbus related functions
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2007-2008 Michael Buesch <m@bues.ch>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include "ssb_private.h"

#include <linux/ssb/ssb.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/etherdevice.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>


/* Define the following to 1 to enable a printk on each coreswitch. */
#define SSB_VERBOSE_PCMCIACORESWITCH_DEBUG		0


/* PCMCIA configuration registers */
#define SSB_PCMCIA_ADDRESS0		0x2E
#define SSB_PCMCIA_ADDRESS1		0x30
#define SSB_PCMCIA_ADDRESS2		0x32
#define SSB_PCMCIA_MEMSEG		0x34
#define SSB_PCMCIA_SPROMCTL		0x36
#define  SSB_PCMCIA_SPROMCTL_IDLE	0
#define  SSB_PCMCIA_SPROMCTL_WRITE	1
#define  SSB_PCMCIA_SPROMCTL_READ	2
#define  SSB_PCMCIA_SPROMCTL_WRITEEN	4
#define  SSB_PCMCIA_SPROMCTL_WRITEDIS	7
#define  SSB_PCMCIA_SPROMCTL_DONE	8
#define SSB_PCMCIA_SPROM_DATALO		0x38
#define SSB_PCMCIA_SPROM_DATAHI		0x3A
#define SSB_PCMCIA_SPROM_ADDRLO		0x3C
#define SSB_PCMCIA_SPROM_ADDRHI		0x3E

/* Hardware invariants CIS tuples */
#define SSB_PCMCIA_CIS			0x80
#define  SSB_PCMCIA_CIS_ID		0x01
#define  SSB_PCMCIA_CIS_BOARDREV	0x02
#define  SSB_PCMCIA_CIS_PA		0x03
#define   SSB_PCMCIA_CIS_PA_PA0B0_LO	0
#define   SSB_PCMCIA_CIS_PA_PA0B0_HI	1
#define   SSB_PCMCIA_CIS_PA_PA0B1_LO	2
#define   SSB_PCMCIA_CIS_PA_PA0B1_HI	3
#define   SSB_PCMCIA_CIS_PA_PA0B2_LO	4
#define   SSB_PCMCIA_CIS_PA_PA0B2_HI	5
#define   SSB_PCMCIA_CIS_PA_ITSSI	6
#define   SSB_PCMCIA_CIS_PA_MAXPOW	7
#define  SSB_PCMCIA_CIS_OEMNAME		0x04
#define  SSB_PCMCIA_CIS_CCODE		0x05
#define  SSB_PCMCIA_CIS_ANTENNA		0x06
#define  SSB_PCMCIA_CIS_ANTGAIN		0x07
#define  SSB_PCMCIA_CIS_BFLAGS		0x08
#define  SSB_PCMCIA_CIS_LEDS		0x09

/* PCMCIA SPROM size. */
#define SSB_PCMCIA_SPROM_SIZE		256
#define SSB_PCMCIA_SPROM_SIZE_BYTES	(SSB_PCMCIA_SPROM_SIZE * sizeof(u16))


/* Write to a PCMCIA configuration register. */
static int ssb_pcmcia_cfg_write(struct ssb_bus *bus, u8 offset, u8 value)
{
	int res;

	res = pcmcia_write_config_byte(bus->host_pcmcia, offset, value);
	if (unlikely(res != 0))
		return -EBUSY;

	return 0;
}

/* Read from a PCMCIA configuration register. */
static int ssb_pcmcia_cfg_read(struct ssb_bus *bus, u8 offset, u8 *value)
{
	int res;

	res = pcmcia_read_config_byte(bus->host_pcmcia, offset, value);
	if (unlikely(res != 0))
		return -EBUSY;

	return 0;
}

int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
			      u8 coreidx)
{
	int err;
	int attempts = 0;
	u32 cur_core;
	u32 addr;
	u32 read_addr;
	u8 val;

	addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
	while (1) {
		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS0,
					   (addr & 0x0000F000) >> 12);
		if (err)
			goto error;
		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS1,
					   (addr & 0x00FF0000) >> 16);
		if (err)
			goto error;
		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS2,
					   (addr & 0xFF000000) >> 24);
		if (err)
			goto error;

		read_addr = 0;

		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS0, &val);
		if (err)
			goto error;
		read_addr |= ((u32)(val & 0x0F)) << 12;
		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS1, &val);
		if (err)
			goto error;
		read_addr |= ((u32)val) << 16;
		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS2, &val);
		if (err)
			goto error;
		read_addr |= ((u32)val) << 24;

		cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
		if (cur_core == coreidx)
			break;

		err = -ETIMEDOUT;
		if (attempts++ > SSB_BAR0_MAX_RETRIES)
			goto error;
		udelay(10);
	}

	return 0;
error:
	pr_err("Failed to switch to core %u\n", coreidx);
	return err;
}

static int ssb_pcmcia_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
{
	int err;

#if SSB_VERBOSE_PCMCIACORESWITCH_DEBUG
	pr_info("Switching to %s core, index %d\n",
		ssb_core_name(dev->id.coreid), dev->core_index);
#endif

	err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
	if (!err)
		bus->mapped_device = dev;

	return err;
}

int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
{
	int attempts = 0;
	int err;
	u8 val;

	WARN_ON((seg != 0) && (seg != 1));
	while (1) {
		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_MEMSEG, seg);
		if (err)
			goto error;
		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_MEMSEG, &val);
		if (err)
			goto error;
		if (val == seg)
			break;

		err = -ETIMEDOUT;
		if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
			goto error;
		udelay(10);
	}
	bus->mapped_pcmcia_seg = seg;

	return 0;
error:
	pr_err("Failed to switch pcmcia segment\n");
	return err;
}

static int select_core_and_segment(struct ssb_device *dev,
				   u16 *offset)
{
	struct ssb_bus *bus = dev->bus;
	int err;
	u8 need_segment;

	if (*offset >= 0x800) {
		*offset -= 0x800;
		need_segment = 1;
	} else
		need_segment = 0;

	if (unlikely(dev != bus->mapped_device)) {
		err = ssb_pcmcia_switch_core(bus, dev);
		if (unlikely(err))
			return err;
	}
	if (unlikely(need_segment != bus->mapped_pcmcia_seg)) {
		err = ssb_pcmcia_switch_segment(bus, need_segment);
		if (unlikely(err))
			return err;
	}

	return 0;
}

static u8 ssb_pcmcia_read8(struct ssb_device *dev, u16 offset)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;
	u8 value = 0xFF;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err))
		value = readb(bus->mmio + offset);
	spin_unlock_irqrestore(&bus->bar_lock, flags);

	return value;
}

static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;
	u16 value = 0xFFFF;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err))
		value = readw(bus->mmio + offset);
	spin_unlock_irqrestore(&bus->bar_lock, flags);

	return value;
}

static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;
	u32 lo = 0xFFFFFFFF, hi = 0xFFFFFFFF;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err)) {
		lo = readw(bus->mmio + offset);
		hi = readw(bus->mmio + offset + 2);
	}
	spin_unlock_irqrestore(&bus->bar_lock, flags);

	return (lo | (hi << 16));
}

#ifdef CONFIG_SSB_BLOCKIO
static void ssb_pcmcia_block_read(struct ssb_device *dev, void *buffer,
				  size_t count, u16 offset, u8 reg_width)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	void __iomem *addr = bus->mmio + offset;
	int err;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (unlikely(err)) {
		memset(buffer, 0xFF, count);
		goto unlock;
	}
	switch (reg_width) {
	case sizeof(u8): {
		u8 *buf = buffer;

		while (count) {
			*buf = __raw_readb(addr);
			buf++;
			count--;
		}
		break;
	}
	case sizeof(u16): {
		__le16 *buf = buffer;

		WARN_ON(count & 1);
		while (count) {
			*buf = (__force __le16)__raw_readw(addr);
			buf++;
			count -= 2;
		}
		break;
	}
	case sizeof(u32): {
		__le16 *buf = buffer;

		WARN_ON(count & 3);
		while (count) {
			*buf = (__force __le16)__raw_readw(addr);
			buf++;
			*buf = (__force __le16)__raw_readw(addr + 2);
			buf++;
			count -= 4;
		}
		break;
	}
	default:
		WARN_ON(1);
	}
unlock:
	spin_unlock_irqrestore(&bus->bar_lock, flags);
}
#endif /* CONFIG_SSB_BLOCKIO */

static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err))
		writeb(value, bus->mmio + offset);
	spin_unlock_irqrestore(&bus->bar_lock, flags);
}

static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err))
		writew(value, bus->mmio + offset);
	spin_unlock_irqrestore(&bus->bar_lock, flags);
}

static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	int err;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (likely(!err)) {
		writew((value & 0x0000FFFF), bus->mmio + offset);
		writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
	}
	spin_unlock_irqrestore(&bus->bar_lock, flags);
}

#ifdef CONFIG_SSB_BLOCKIO
static void ssb_pcmcia_block_write(struct ssb_device *dev, const void *buffer,
				   size_t count, u16 offset, u8 reg_width)
{
	struct ssb_bus *bus = dev->bus;
	unsigned long flags;
	void __iomem *addr = bus->mmio + offset;
	int err;

	spin_lock_irqsave(&bus->bar_lock, flags);
	err = select_core_and_segment(dev, &offset);
	if (unlikely(err))
		goto unlock;
	switch (reg_width) {
	case sizeof(u8): {
		const u8 *buf = buffer;

		while (count) {
			__raw_writeb(*buf, addr);
			buf++;
			count--;
		}
		break;
	}
	case sizeof(u16): {
		const __le16 *buf = buffer;

		WARN_ON(count & 1);
		while (count) {
			__raw_writew((__force u16)(*buf), addr);
			buf++;
			count -= 2;
		}
		break;
	}
	case sizeof(u32): {
		const __le16 *buf = buffer;

		WARN_ON(count & 3);
		while (count) {
			__raw_writew((__force u16)(*buf), addr);
			buf++;
			__raw_writew((__force u16)(*buf), addr + 2);
			buf++;
			count -= 4;
		}
		break;
	}
	default:
		WARN_ON(1);
	}
unlock:
	spin_unlock_irqrestore(&bus->bar_lock, flags);
}
#endif /* CONFIG_SSB_BLOCKIO */

/* Not "static", as it's used in main.c */
const struct ssb_bus_ops ssb_pcmcia_ops = {
	.read8		= ssb_pcmcia_read8,
	.read16		= ssb_pcmcia_read16,
	.read32		= ssb_pcmcia_read32,
	.write8		= ssb_pcmcia_write8,
	.write16	= ssb_pcmcia_write16,
	.write32	= ssb_pcmcia_write32,
#ifdef CONFIG_SSB_BLOCKIO
	.block_read	= ssb_pcmcia_block_read,
	.block_write	= ssb_pcmcia_block_write,
#endif
};

static int ssb_pcmcia_sprom_command(struct ssb_bus *bus, u8 command)
{
	unsigned int i;
	int err;
	u8 value;

	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROMCTL, command);
	if (err)
		return err;
	for (i = 0; i < 1000; i++) {
		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROMCTL, &value);
		if (err)
			return err;
		if (value & SSB_PCMCIA_SPROMCTL_DONE)
			return 0;
		udelay(10);
	}

	return -ETIMEDOUT;
}

/* offset is the 16bit word offset */
static int ssb_pcmcia_sprom_read(struct ssb_bus *bus, u16 offset, u16 *value)
{
	int err;
	u8 lo, hi;

	offset *= 2; /* Make byte offset */

	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
				   (offset & 0x00FF));
	if (err)
		return err;
	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
				   (offset & 0xFF00) >> 8);
	if (err)
		return err;
	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_READ);
	if (err)
		return err;
	err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATALO, &lo);
	if (err)
		return err;
	err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATAHI, &hi);
	if (err)
		return err;
	*value = (lo | (((u16)hi) << 8));

	return 0;
}

/* offset is the 16bit word offset */
static int ssb_pcmcia_sprom_write(struct ssb_bus *bus, u16 offset, u16 value)
{
	int err;

	offset *= 2; /* Make byte offset */

	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
				   (offset & 0x00FF));
	if (err)
		return err;
	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
				   (offset & 0xFF00) >> 8);
	if (err)
		return err;
	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATALO,
				   (value & 0x00FF));
	if (err)
		return err;
	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATAHI,
				   (value & 0xFF00) >> 8);
	if (err)
		return err;
	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITE);
	if (err)
		return err;
	msleep(20);

	return 0;
}

/* Read the SPROM image. bufsize is in 16bit words. */
static int ssb_pcmcia_sprom_read_all(struct ssb_bus *bus, u16 *sprom)
{
	int err, i;

	for (i = 0; i < SSB_PCMCIA_SPROM_SIZE; i++) {
		err = ssb_pcmcia_sprom_read(bus, i, &sprom[i]);
		if (err)
			return err;
	}

	return 0;
}

/* Write the SPROM image. size is in 16bit words. */
static int ssb_pcmcia_sprom_write_all(struct ssb_bus *bus, const u16 *sprom)
{
	int i, err;
	bool failed = 0;
	size_t size = SSB_PCMCIA_SPROM_SIZE;

	pr_notice("Writing SPROM. Do NOT turn off the power! Please stand by...\n");
	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEEN);
	if (err) {
		pr_notice("Could not enable SPROM write access\n");
		return -EBUSY;
	}
	pr_notice("[ 0%%");
	msleep(500);
	for (i = 0; i < size; i++) {
		if (i == size / 4)
			pr_cont("25%%");
		else if (i == size / 2)
			pr_cont("50%%");
		else if (i == (size * 3) / 4)
			pr_cont("75%%");
		else if (i % 2)
			pr_cont(".");
		err = ssb_pcmcia_sprom_write(bus, i, sprom[i]);
		if (err) {
			pr_notice("Failed to write to SPROM\n");
			failed = 1;
			break;
		}
	}
	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEDIS);
	if (err) {
		pr_notice("Could not disable SPROM write access\n");
		failed = 1;
	}
	msleep(500);
	if (!failed) {
		pr_cont("100%% ]\n");
		pr_notice("SPROM written\n");
	}

	return failed ? -EBUSY : 0;
}

static int ssb_pcmcia_sprom_check_crc(const u16 *sprom, size_t size)
{
	//TODO
	return 0;
}

#define GOTO_ERROR_ON(condition, description) do {	\
	if (unlikely(condition)) {			\
		error_description = description;	\
		goto error;				\
	}						\
  } while (0)

static int ssb_pcmcia_get_mac(struct pcmcia_device *p_dev,
			tuple_t *tuple,
			void *priv)
{
	struct ssb_sprom *sprom = priv;

	if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
		return -EINVAL;
	if (tuple->TupleDataLen != ETH_ALEN + 2)
		return -EINVAL;
	if (tuple->TupleData[1] != ETH_ALEN)
		return -EINVAL;
	memcpy(sprom->il0mac, &tuple->TupleData[2], ETH_ALEN);
	return 0;
};

static int ssb_pcmcia_do_get_invariants(struct pcmcia_device *p_dev,
					tuple_t *tuple,
					void *priv)
{
	struct ssb_init_invariants *iv = priv;
	struct ssb_sprom *sprom = &iv->sprom;
	struct ssb_boardinfo *bi = &iv->boardinfo;
	const char *error_description;

	GOTO_ERROR_ON(tuple->TupleDataLen < 1, "VEN tpl < 1");
	switch (tuple->TupleData[0]) {
	case SSB_PCMCIA_CIS_ID:
		GOTO_ERROR_ON((tuple->TupleDataLen != 5) &&
			      (tuple->TupleDataLen != 7),
			      "id tpl size");
		bi->vendor = tuple->TupleData[1] |
			((u16)tuple->TupleData[2] << 8);
		break;
	case SSB_PCMCIA_CIS_BOARDREV:
		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
			"boardrev tpl size");
		sprom->board_rev = tuple->TupleData[1];
		break;
	case SSB_PCMCIA_CIS_PA:
		GOTO_ERROR_ON((tuple->TupleDataLen != 9) &&
			(tuple->TupleDataLen != 10),
			"pa tpl size");
		sprom->pa0b0 = tuple->TupleData[1] |
			((u16)tuple->TupleData[2] << 8);
		sprom->pa0b1 = tuple->TupleData[3] |
			((u16)tuple->TupleData[4] << 8);
		sprom->pa0b2 = tuple->TupleData[5] |
			((u16)tuple->TupleData[6] << 8);
		sprom->itssi_a = tuple->TupleData[7];
		sprom->itssi_bg = tuple->TupleData[7];
		sprom->maxpwr_a = tuple->TupleData[8];
		sprom->maxpwr_bg = tuple->TupleData[8];
		break;
	case SSB_PCMCIA_CIS_OEMNAME:
		/* We ignore this. */
		break;
	case SSB_PCMCIA_CIS_CCODE:
		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
			"ccode tpl size");
		sprom->country_code = tuple->TupleData[1];
		break;
	case SSB_PCMCIA_CIS_ANTENNA:
		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
			"ant tpl size");
		sprom->ant_available_a = tuple->TupleData[1];
		sprom->ant_available_bg = tuple->TupleData[1];
		break;
	case SSB_PCMCIA_CIS_ANTGAIN:
		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
			"antg tpl size");
		sprom->antenna_gain.a0 = tuple->TupleData[1];
		sprom->antenna_gain.a1 = tuple->TupleData[1];
		sprom->antenna_gain.a2 = tuple->TupleData[1];
		sprom->antenna_gain.a3 = tuple->TupleData[1];
		break;
	case SSB_PCMCIA_CIS_BFLAGS:
		GOTO_ERROR_ON((tuple->TupleDataLen != 3) &&
			(tuple->TupleDataLen != 5),
			"bfl tpl size");
		sprom->boardflags_lo = tuple->TupleData[1] |
			((u16)tuple->TupleData[2] << 8);
		break;
	case SSB_PCMCIA_CIS_LEDS:
		GOTO_ERROR_ON(tuple->TupleDataLen != 5,
			"leds tpl size");
		sprom->gpio0 = tuple->TupleData[1];
		sprom->gpio1 = tuple->TupleData[2];
		sprom->gpio2 = tuple->TupleData[3];
		sprom->gpio3 = tuple->TupleData[4];
		break;
	}
	return -ENOSPC; /* continue with next entry */

error:
	pr_err("PCMCIA: Failed to fetch device invariants: %s\n",
	       error_description);
	return -ENODEV;
}


int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
			      struct ssb_init_invariants *iv)
{
	struct ssb_sprom *sprom = &iv->sprom;
	int res;

	memset(sprom, 0xFF, sizeof(*sprom));
	sprom->revision = 1;
	sprom->boardflags_lo = 0;
	sprom->boardflags_hi = 0;

	/* First fetch the MAC address. */
	res = pcmcia_loop_tuple(bus->host_pcmcia, CISTPL_FUNCE,
				ssb_pcmcia_get_mac, sprom);
	if (res != 0) {
		pr_err("PCMCIA: Failed to fetch MAC address\n");
		return -ENODEV;
	}

	/* Fetch the vendor specific tuples. */
	res = pcmcia_loop_tuple(bus->host_pcmcia, SSB_PCMCIA_CIS,
				ssb_pcmcia_do_get_invariants, iv);
	if ((res == 0) || (res == -ENOSPC))
		return 0;

	pr_err("PCMCIA: Failed to fetch device invariants\n");
	return -ENODEV;
}

static ssize_t ssb_sprom_show(struct device *pcmciadev,
			      struct device_attribute *attr,
			      char *buf)
{
	struct pcmcia_device *pdev =
		container_of(pcmciadev, struct pcmcia_device, dev);
	struct ssb_bus *bus;

	bus = ssb_pcmcia_dev_to_bus(pdev);
	if (!bus)
		return -ENODEV;

	return ssb_attr_sprom_show(bus, buf,
				   ssb_pcmcia_sprom_read_all);
}

static ssize_t ssb_sprom_store(struct device *pcmciadev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct pcmcia_device *pdev =
		container_of(pcmciadev, struct pcmcia_device, dev);
	struct ssb_bus *bus;

	bus = ssb_pcmcia_dev_to_bus(pdev);
	if (!bus)
		return -ENODEV;

	return ssb_attr_sprom_store(bus, buf, count,
				    ssb_pcmcia_sprom_check_crc,
				    ssb_pcmcia_sprom_write_all);
}

static DEVICE_ATTR_ADMIN_RW(ssb_sprom);

static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
{
	u8 val;
	int err;

	err = ssb_pcmcia_cfg_read(bus, cor, &val);
	if (err)
		return err;
	val &= ~COR_SOFT_RESET;
	val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
	err = ssb_pcmcia_cfg_write(bus, cor, val);
	if (err)
		return err;
	msleep(40);

	return 0;
}

/* Initialize the PCMCIA hardware. This is called on Init and Resume. */
int ssb_pcmcia_hardware_setup(struct ssb_bus *bus)
{
	int err;

	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
		return 0;

	/* Switch segment to a known state and sync
	 * bus->mapped_pcmcia_seg with hardware state. */
	ssb_pcmcia_switch_segment(bus, 0);
	/* Init the COR register. */
	err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
	if (err)
		return err;
	/* Some cards also need this register to get poked. */
	err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
	if (err)
		return err;

	return 0;
}

void ssb_pcmcia_exit(struct ssb_bus *bus)
{
	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
		return;

	device_remove_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
}

int ssb_pcmcia_init(struct ssb_bus *bus)
{
	int err;

	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
		return 0;

	err = ssb_pcmcia_hardware_setup(bus);
	if (err)
		goto error;

	bus->sprom_size = SSB_PCMCIA_SPROM_SIZE;
	mutex_init(&bus->sprom_mutex);
	err = device_create_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
	if (err)
		goto error;

	return 0;
error:
	pr_err("Failed to initialize PCMCIA host device\n");
	return err;
}