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bbc_i2c: Remove unneeded err variable
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ssb / pcmcia.c
blobc821c6b2a6a0b778da37a7994ad1ad2d57335428
1 /*
2 * Sonics Silicon Backplane
3 * PCMCIA-Hostbus related functions
4 *
5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2007-2008 Michael Buesch <m@bues.ch>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11 #include <linux/ssb/ssb.h>
12 #include <linux/delay.h>
13 #include <linux/io.h>
14 #include <linux/etherdevice.h>
15
16 #include <pcmcia/cistpl.h>
17 #include <pcmcia/ciscode.h>
18 #include <pcmcia/ds.h>
19 #include <pcmcia/cisreg.h>
20
21 #include "ssb_private.h"
22
23
24 /* Define the following to 1 to enable a printk on each coreswitch. */
25 #define SSB_VERBOSE_PCMCIACORESWITCH_DEBUG 0
26
27
28 /* PCMCIA configuration registers */
29 #define SSB_PCMCIA_ADDRESS0 0x2E
30 #define SSB_PCMCIA_ADDRESS1 0x30
31 #define SSB_PCMCIA_ADDRESS2 0x32
32 #define SSB_PCMCIA_MEMSEG 0x34
33 #define SSB_PCMCIA_SPROMCTL 0x36
34 #define SSB_PCMCIA_SPROMCTL_IDLE 0
35 #define SSB_PCMCIA_SPROMCTL_WRITE 1
36 #define SSB_PCMCIA_SPROMCTL_READ 2
37 #define SSB_PCMCIA_SPROMCTL_WRITEEN 4
38 #define SSB_PCMCIA_SPROMCTL_WRITEDIS 7
39 #define SSB_PCMCIA_SPROMCTL_DONE 8
40 #define SSB_PCMCIA_SPROM_DATALO 0x38
41 #define SSB_PCMCIA_SPROM_DATAHI 0x3A
42 #define SSB_PCMCIA_SPROM_ADDRLO 0x3C
43 #define SSB_PCMCIA_SPROM_ADDRHI 0x3E
44
45 /* Hardware invariants CIS tuples */
46 #define SSB_PCMCIA_CIS 0x80
47 #define SSB_PCMCIA_CIS_ID 0x01
48 #define SSB_PCMCIA_CIS_BOARDREV 0x02
49 #define SSB_PCMCIA_CIS_PA 0x03
50 #define SSB_PCMCIA_CIS_PA_PA0B0_LO 0
51 #define SSB_PCMCIA_CIS_PA_PA0B0_HI 1
52 #define SSB_PCMCIA_CIS_PA_PA0B1_LO 2
53 #define SSB_PCMCIA_CIS_PA_PA0B1_HI 3
54 #define SSB_PCMCIA_CIS_PA_PA0B2_LO 4
55 #define SSB_PCMCIA_CIS_PA_PA0B2_HI 5
56 #define SSB_PCMCIA_CIS_PA_ITSSI 6
57 #define SSB_PCMCIA_CIS_PA_MAXPOW 7
58 #define SSB_PCMCIA_CIS_OEMNAME 0x04
59 #define SSB_PCMCIA_CIS_CCODE 0x05
60 #define SSB_PCMCIA_CIS_ANTENNA 0x06
61 #define SSB_PCMCIA_CIS_ANTGAIN 0x07
62 #define SSB_PCMCIA_CIS_BFLAGS 0x08
63 #define SSB_PCMCIA_CIS_LEDS 0x09
64
65 /* PCMCIA SPROM size. */
66 #define SSB_PCMCIA_SPROM_SIZE 256
67 #define SSB_PCMCIA_SPROM_SIZE_BYTES (SSB_PCMCIA_SPROM_SIZE * sizeof(u16))
68
69
70 /* Write to a PCMCIA configuration register. */
71 static int ssb_pcmcia_cfg_write(struct ssb_bus *bus, u8 offset, u8 value)
72 {
73 int res;
74
75 res = pcmcia_write_config_byte(bus->host_pcmcia, offset, value);
76 if (unlikely(res != 0))
77 return -EBUSY;
78
79 return 0;
80 }
81
82 /* Read from a PCMCIA configuration register. */
83 static int ssb_pcmcia_cfg_read(struct ssb_bus *bus, u8 offset, u8 *value)
84 {
85 int res;
86
87 res = pcmcia_read_config_byte(bus->host_pcmcia, offset, value);
88 if (unlikely(res != 0))
89 return -EBUSY;
90
91 return 0;
92 }
93
94 int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
95 u8 coreidx)
96 {
97 int err;
98 int attempts = 0;
99 u32 cur_core;
100 u32 addr;
101 u32 read_addr;
102 u8 val;
103
104 addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
105 while (1) {
106 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS0,
107 (addr & 0x0000F000) >> 12);
108 if (err)
109 goto error;
110 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS1,
111 (addr & 0x00FF0000) >> 16);
112 if (err)
113 goto error;
114 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS2,
115 (addr & 0xFF000000) >> 24);
116 if (err)
117 goto error;
118
119 read_addr = 0;
120
121 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS0, &val);
122 if (err)
123 goto error;
124 read_addr |= ((u32)(val & 0x0F)) << 12;
125 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS1, &val);
126 if (err)
127 goto error;
128 read_addr |= ((u32)val) << 16;
129 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS2, &val);
130 if (err)
131 goto error;
132 read_addr |= ((u32)val) << 24;
133
134 cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
135 if (cur_core == coreidx)
136 break;
137
138 err = -ETIMEDOUT;
139 if (attempts++ > SSB_BAR0_MAX_RETRIES)
140 goto error;
141 udelay(10);
142 }
143
144 return 0;
145 error:
146 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
147 return err;
148 }
149
150 int ssb_pcmcia_switch_core(struct ssb_bus *bus,
151 struct ssb_device *dev)
152 {
153 int err;
154
155 #if SSB_VERBOSE_PCMCIACORESWITCH_DEBUG
156 ssb_printk(KERN_INFO PFX
157 "Switching to %s core, index %d\n",
158 ssb_core_name(dev->id.coreid),
159 dev->core_index);
160 #endif
161
162 err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
163 if (!err)
164 bus->mapped_device = dev;
165
166 return err;
167 }
168
169 int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
170 {
171 int attempts = 0;
172 int err;
173 u8 val;
174
175 SSB_WARN_ON((seg != 0) && (seg != 1));
176 while (1) {
177 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_MEMSEG, seg);
178 if (err)
179 goto error;
180 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_MEMSEG, &val);
181 if (err)
182 goto error;
183 if (val == seg)
184 break;
185
186 err = -ETIMEDOUT;
187 if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
188 goto error;
189 udelay(10);
190 }
191 bus->mapped_pcmcia_seg = seg;
192
193 return 0;
194 error:
195 ssb_printk(KERN_ERR PFX "Failed to switch pcmcia segment\n");
196 return err;
197 }
198
199 static int select_core_and_segment(struct ssb_device *dev,
200 u16 *offset)
201 {
202 struct ssb_bus *bus = dev->bus;
203 int err;
204 u8 need_segment;
205
206 if (*offset >= 0x800) {
207 *offset -= 0x800;
208 need_segment = 1;
209 } else
210 need_segment = 0;
211
212 if (unlikely(dev != bus->mapped_device)) {
213 err = ssb_pcmcia_switch_core(bus, dev);
214 if (unlikely(err))
215 return err;
216 }
217 if (unlikely(need_segment != bus->mapped_pcmcia_seg)) {
218 err = ssb_pcmcia_switch_segment(bus, need_segment);
219 if (unlikely(err))
220 return err;
221 }
222
223 return 0;
224 }
225
226 static u8 ssb_pcmcia_read8(struct ssb_device *dev, u16 offset)
227 {
228 struct ssb_bus *bus = dev->bus;
229 unsigned long flags;
230 int err;
231 u8 value = 0xFF;
232
233 spin_lock_irqsave(&bus->bar_lock, flags);
234 err = select_core_and_segment(dev, &offset);
235 if (likely(!err))
236 value = readb(bus->mmio + offset);
237 spin_unlock_irqrestore(&bus->bar_lock, flags);
238
239 return value;
240 }
241
242 static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
243 {
244 struct ssb_bus *bus = dev->bus;
245 unsigned long flags;
246 int err;
247 u16 value = 0xFFFF;
248
249 spin_lock_irqsave(&bus->bar_lock, flags);
250 err = select_core_and_segment(dev, &offset);
251 if (likely(!err))
252 value = readw(bus->mmio + offset);
253 spin_unlock_irqrestore(&bus->bar_lock, flags);
254
255 return value;
256 }
257
258 static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
259 {
260 struct ssb_bus *bus = dev->bus;
261 unsigned long flags;
262 int err;
263 u32 lo = 0xFFFFFFFF, hi = 0xFFFFFFFF;
264
265 spin_lock_irqsave(&bus->bar_lock, flags);
266 err = select_core_and_segment(dev, &offset);
267 if (likely(!err)) {
268 lo = readw(bus->mmio + offset);
269 hi = readw(bus->mmio + offset + 2);
270 }
271 spin_unlock_irqrestore(&bus->bar_lock, flags);
272
273 return (lo | (hi << 16));
274 }
275
276 #ifdef CONFIG_SSB_BLOCKIO
277 static void ssb_pcmcia_block_read(struct ssb_device *dev, void *buffer,
278 size_t count, u16 offset, u8 reg_width)
279 {
280 struct ssb_bus *bus = dev->bus;
281 unsigned long flags;
282 void __iomem *addr = bus->mmio + offset;
283 int err;
284
285 spin_lock_irqsave(&bus->bar_lock, flags);
286 err = select_core_and_segment(dev, &offset);
287 if (unlikely(err)) {
288 memset(buffer, 0xFF, count);
289 goto unlock;
290 }
291 switch (reg_width) {
292 case sizeof(u8): {
293 u8 *buf = buffer;
294
295 while (count) {
296 *buf = __raw_readb(addr);
297 buf++;
298 count--;
299 }
300 break;
301 }
302 case sizeof(u16): {
303 __le16 *buf = buffer;
304
305 SSB_WARN_ON(count & 1);
306 while (count) {
307 *buf = (__force __le16)__raw_readw(addr);
308 buf++;
309 count -= 2;
310 }
311 break;
312 }
313 case sizeof(u32): {
314 __le16 *buf = buffer;
315
316 SSB_WARN_ON(count & 3);
317 while (count) {
318 *buf = (__force __le16)__raw_readw(addr);
319 buf++;
320 *buf = (__force __le16)__raw_readw(addr + 2);
321 buf++;
322 count -= 4;
323 }
324 break;
325 }
326 default:
327 SSB_WARN_ON(1);
328 }
329 unlock:
330 spin_unlock_irqrestore(&bus->bar_lock, flags);
331 }
332 #endif /* CONFIG_SSB_BLOCKIO */
333
334 static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value)
335 {
336 struct ssb_bus *bus = dev->bus;
337 unsigned long flags;
338 int err;
339
340 spin_lock_irqsave(&bus->bar_lock, flags);
341 err = select_core_and_segment(dev, &offset);
342 if (likely(!err))
343 writeb(value, bus->mmio + offset);
344 mmiowb();
345 spin_unlock_irqrestore(&bus->bar_lock, flags);
346 }
347
348 static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
349 {
350 struct ssb_bus *bus = dev->bus;
351 unsigned long flags;
352 int err;
353
354 spin_lock_irqsave(&bus->bar_lock, flags);
355 err = select_core_and_segment(dev, &offset);
356 if (likely(!err))
357 writew(value, bus->mmio + offset);
358 mmiowb();
359 spin_unlock_irqrestore(&bus->bar_lock, flags);
360 }
361
362 static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
363 {
364 struct ssb_bus *bus = dev->bus;
365 unsigned long flags;
366 int err;
367
368 spin_lock_irqsave(&bus->bar_lock, flags);
369 err = select_core_and_segment(dev, &offset);
370 if (likely(!err)) {
371 writew((value & 0x0000FFFF), bus->mmio + offset);
372 writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
373 }
374 mmiowb();
375 spin_unlock_irqrestore(&bus->bar_lock, flags);
376 }
377
378 #ifdef CONFIG_SSB_BLOCKIO
379 static void ssb_pcmcia_block_write(struct ssb_device *dev, const void *buffer,
380 size_t count, u16 offset, u8 reg_width)
381 {
382 struct ssb_bus *bus = dev->bus;
383 unsigned long flags;
384 void __iomem *addr = bus->mmio + offset;
385 int err;
386
387 spin_lock_irqsave(&bus->bar_lock, flags);
388 err = select_core_and_segment(dev, &offset);
389 if (unlikely(err))
390 goto unlock;
391 switch (reg_width) {
392 case sizeof(u8): {
393 const u8 *buf = buffer;
394
395 while (count) {
396 __raw_writeb(*buf, addr);
397 buf++;
398 count--;
399 }
400 break;
401 }
402 case sizeof(u16): {
403 const __le16 *buf = buffer;
404
405 SSB_WARN_ON(count & 1);
406 while (count) {
407 __raw_writew((__force u16)(*buf), addr);
408 buf++;
409 count -= 2;
410 }
411 break;
412 }
413 case sizeof(u32): {
414 const __le16 *buf = buffer;
415
416 SSB_WARN_ON(count & 3);
417 while (count) {
418 __raw_writew((__force u16)(*buf), addr);
419 buf++;
420 __raw_writew((__force u16)(*buf), addr + 2);
421 buf++;
422 count -= 4;
423 }
424 break;
425 }
426 default:
427 SSB_WARN_ON(1);
428 }
429 unlock:
430 mmiowb();
431 spin_unlock_irqrestore(&bus->bar_lock, flags);
432 }
433 #endif /* CONFIG_SSB_BLOCKIO */
434
435 /* Not "static", as it's used in main.c */
436 const struct ssb_bus_ops ssb_pcmcia_ops = {
437 .read8 = ssb_pcmcia_read8,
438 .read16 = ssb_pcmcia_read16,
439 .read32 = ssb_pcmcia_read32,
440 .write8 = ssb_pcmcia_write8,
441 .write16 = ssb_pcmcia_write16,
442 .write32 = ssb_pcmcia_write32,
443 #ifdef CONFIG_SSB_BLOCKIO
444 .block_read = ssb_pcmcia_block_read,
445 .block_write = ssb_pcmcia_block_write,
446 #endif
447 };
448
449 static int ssb_pcmcia_sprom_command(struct ssb_bus *bus, u8 command)
450 {
451 unsigned int i;
452 int err;
453 u8 value;
454
455 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROMCTL, command);
456 if (err)
457 return err;
458 for (i = 0; i < 1000; i++) {
459 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROMCTL, &value);
460 if (err)
461 return err;
462 if (value & SSB_PCMCIA_SPROMCTL_DONE)
463 return 0;
464 udelay(10);
465 }
466
467 return -ETIMEDOUT;
468 }
469
470 /* offset is the 16bit word offset */
471 static int ssb_pcmcia_sprom_read(struct ssb_bus *bus, u16 offset, u16 *value)
472 {
473 int err;
474 u8 lo, hi;
475
476 offset *= 2; /* Make byte offset */
477
478 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
479 (offset & 0x00FF));
480 if (err)
481 return err;
482 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
483 (offset & 0xFF00) >> 8);
484 if (err)
485 return err;
486 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_READ);
487 if (err)
488 return err;
489 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATALO, &lo);
490 if (err)
491 return err;
492 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATAHI, &hi);
493 if (err)
494 return err;
495 *value = (lo | (((u16)hi) << 8));
496
497 return 0;
498 }
499
500 /* offset is the 16bit word offset */
501 static int ssb_pcmcia_sprom_write(struct ssb_bus *bus, u16 offset, u16 value)
502 {
503 int err;
504
505 offset *= 2; /* Make byte offset */
506
507 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
508 (offset & 0x00FF));
509 if (err)
510 return err;
511 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
512 (offset & 0xFF00) >> 8);
513 if (err)
514 return err;
515 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATALO,
516 (value & 0x00FF));
517 if (err)
518 return err;
519 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATAHI,
520 (value & 0xFF00) >> 8);
521 if (err)
522 return err;
523 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITE);
524 if (err)
525 return err;
526 msleep(20);
527
528 return 0;
529 }
530
531 /* Read the SPROM image. bufsize is in 16bit words. */
532 static int ssb_pcmcia_sprom_read_all(struct ssb_bus *bus, u16 *sprom)
533 {
534 int err, i;
535
536 for (i = 0; i < SSB_PCMCIA_SPROM_SIZE; i++) {
537 err = ssb_pcmcia_sprom_read(bus, i, &sprom[i]);
538 if (err)
539 return err;
540 }
541
542 return 0;
543 }
544
545 /* Write the SPROM image. size is in 16bit words. */
546 static int ssb_pcmcia_sprom_write_all(struct ssb_bus *bus, const u16 *sprom)
547 {
548 int i, err;
549 bool failed = 0;
550 size_t size = SSB_PCMCIA_SPROM_SIZE;
551
552 ssb_printk(KERN_NOTICE PFX
553 "Writing SPROM. Do NOT turn off the power! "
554 "Please stand by...\n");
555 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEEN);
556 if (err) {
557 ssb_printk(KERN_NOTICE PFX
558 "Could not enable SPROM write access.\n");
559 return -EBUSY;
560 }
561 ssb_printk(KERN_NOTICE PFX "[ 0%%");
562 msleep(500);
563 for (i = 0; i < size; i++) {
564 if (i == size / 4)
565 ssb_printk("25%%");
566 else if (i == size / 2)
567 ssb_printk("50%%");
568 else if (i == (size * 3) / 4)
569 ssb_printk("75%%");
570 else if (i % 2)
571 ssb_printk(".");
572 err = ssb_pcmcia_sprom_write(bus, i, sprom[i]);
573 if (err) {
574 ssb_printk(KERN_NOTICE PFX
575 "Failed to write to SPROM.\n");
576 failed = 1;
577 break;
578 }
579 }
580 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEDIS);
581 if (err) {
582 ssb_printk(KERN_NOTICE PFX
583 "Could not disable SPROM write access.\n");
584 failed = 1;
585 }
586 msleep(500);
587 if (!failed) {
588 ssb_printk("100%% ]\n");
589 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
590 }
591
592 return failed ? -EBUSY : 0;
593 }
594
595 static int ssb_pcmcia_sprom_check_crc(const u16 *sprom, size_t size)
596 {
597 //TODO
598 return 0;
599 }
600
601 #define GOTO_ERROR_ON(condition, description) do { \
602 if (unlikely(condition)) { \
603 error_description = description; \
604 goto error; \
605 } \
606 } while (0)
607
608 static int ssb_pcmcia_get_mac(struct pcmcia_device *p_dev,
609 tuple_t *tuple,
610 void *priv)
611 {
612 struct ssb_sprom *sprom = priv;
613
614 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
615 return -EINVAL;
616 if (tuple->TupleDataLen != ETH_ALEN + 2)
617 return -EINVAL;
618 if (tuple->TupleData[1] != ETH_ALEN)
619 return -EINVAL;
620 memcpy(sprom->il0mac, &tuple->TupleData[2], ETH_ALEN);
621 return 0;
622 };
623
624 static int ssb_pcmcia_do_get_invariants(struct pcmcia_device *p_dev,
625 tuple_t *tuple,
626 void *priv)
627 {
628 struct ssb_init_invariants *iv = priv;
629 struct ssb_sprom *sprom = &iv->sprom;
630 struct ssb_boardinfo *bi = &iv->boardinfo;
631 const char *error_description;
632
633 GOTO_ERROR_ON(tuple->TupleDataLen < 1, "VEN tpl < 1");
634 switch (tuple->TupleData[0]) {
635 case SSB_PCMCIA_CIS_ID:
636 GOTO_ERROR_ON((tuple->TupleDataLen != 5) &&
637 (tuple->TupleDataLen != 7),
638 "id tpl size");
639 bi->vendor = tuple->TupleData[1] |
640 ((u16)tuple->TupleData[2] << 8);
641 break;
642 case SSB_PCMCIA_CIS_BOARDREV:
643 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
644 "boardrev tpl size");
645 sprom->board_rev = tuple->TupleData[1];
646 break;
647 case SSB_PCMCIA_CIS_PA:
648 GOTO_ERROR_ON((tuple->TupleDataLen != 9) &&
649 (tuple->TupleDataLen != 10),
650 "pa tpl size");
651 sprom->pa0b0 = tuple->TupleData[1] |
652 ((u16)tuple->TupleData[2] << 8);
653 sprom->pa0b1 = tuple->TupleData[3] |
654 ((u16)tuple->TupleData[4] << 8);
655 sprom->pa0b2 = tuple->TupleData[5] |
656 ((u16)tuple->TupleData[6] << 8);
657 sprom->itssi_a = tuple->TupleData[7];
658 sprom->itssi_bg = tuple->TupleData[7];
659 sprom->maxpwr_a = tuple->TupleData[8];
660 sprom->maxpwr_bg = tuple->TupleData[8];
661 break;
662 case SSB_PCMCIA_CIS_OEMNAME:
663 /* We ignore this. */
664 break;
665 case SSB_PCMCIA_CIS_CCODE:
666 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
667 "ccode tpl size");
668 sprom->country_code = tuple->TupleData[1];
669 break;
670 case SSB_PCMCIA_CIS_ANTENNA:
671 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
672 "ant tpl size");
673 sprom->ant_available_a = tuple->TupleData[1];
674 sprom->ant_available_bg = tuple->TupleData[1];
675 break;
676 case SSB_PCMCIA_CIS_ANTGAIN:
677 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
678 "antg tpl size");
679 sprom->antenna_gain.ghz24.a0 = tuple->TupleData[1];
680 sprom->antenna_gain.ghz24.a1 = tuple->TupleData[1];
681 sprom->antenna_gain.ghz24.a2 = tuple->TupleData[1];
682 sprom->antenna_gain.ghz24.a3 = tuple->TupleData[1];
683 sprom->antenna_gain.ghz5.a0 = tuple->TupleData[1];
684 sprom->antenna_gain.ghz5.a1 = tuple->TupleData[1];
685 sprom->antenna_gain.ghz5.a2 = tuple->TupleData[1];
686 sprom->antenna_gain.ghz5.a3 = tuple->TupleData[1];
687 break;
688 case SSB_PCMCIA_CIS_BFLAGS:
689 GOTO_ERROR_ON((tuple->TupleDataLen != 3) &&
690 (tuple->TupleDataLen != 5),
691 "bfl tpl size");
692 sprom->boardflags_lo = tuple->TupleData[1] |
693 ((u16)tuple->TupleData[2] << 8);
694 break;
695 case SSB_PCMCIA_CIS_LEDS:
696 GOTO_ERROR_ON(tuple->TupleDataLen != 5,
697 "leds tpl size");
698 sprom->gpio0 = tuple->TupleData[1];
699 sprom->gpio1 = tuple->TupleData[2];
700 sprom->gpio2 = tuple->TupleData[3];
701 sprom->gpio3 = tuple->TupleData[4];
702 break;
703 }
704 return -ENOSPC; /* continue with next entry */
705
706 error:
707 ssb_printk(KERN_ERR PFX
708 "PCMCIA: Failed to fetch device invariants: %s\n",
709 error_description);
710 return -ENODEV;
711 }
712
713
714 int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
715 struct ssb_init_invariants *iv)
716 {
717 struct ssb_sprom *sprom = &iv->sprom;
718 int res;
719
720 memset(sprom, 0xFF, sizeof(*sprom));
721 sprom->revision = 1;
722 sprom->boardflags_lo = 0;
723 sprom->boardflags_hi = 0;
724
725 /* First fetch the MAC address. */
726 res = pcmcia_loop_tuple(bus->host_pcmcia, CISTPL_FUNCE,
727 ssb_pcmcia_get_mac, sprom);
728 if (res != 0) {
729 ssb_printk(KERN_ERR PFX
730 "PCMCIA: Failed to fetch MAC address\n");
731 return -ENODEV;
732 }
733
734 /* Fetch the vendor specific tuples. */
735 res = pcmcia_loop_tuple(bus->host_pcmcia, SSB_PCMCIA_CIS,
736 ssb_pcmcia_do_get_invariants, iv);
737 if ((res == 0) || (res == -ENOSPC))
738 return 0;
739
740 ssb_printk(KERN_ERR PFX
741 "PCMCIA: Failed to fetch device invariants\n");
742 return -ENODEV;
743 }
744
745 static ssize_t ssb_pcmcia_attr_sprom_show(struct device *pcmciadev,
746 struct device_attribute *attr,
747 char *buf)
748 {
749 struct pcmcia_device *pdev =
750 container_of(pcmciadev, struct pcmcia_device, dev);
751 struct ssb_bus *bus;
752
753 bus = ssb_pcmcia_dev_to_bus(pdev);
754 if (!bus)
755 return -ENODEV;
756
757 return ssb_attr_sprom_show(bus, buf,
758 ssb_pcmcia_sprom_read_all);
759 }
760
761 static ssize_t ssb_pcmcia_attr_sprom_store(struct device *pcmciadev,
762 struct device_attribute *attr,
763 const char *buf, size_t count)
764 {
765 struct pcmcia_device *pdev =
766 container_of(pcmciadev, struct pcmcia_device, dev);
767 struct ssb_bus *bus;
768
769 bus = ssb_pcmcia_dev_to_bus(pdev);
770 if (!bus)
771 return -ENODEV;
772
773 return ssb_attr_sprom_store(bus, buf, count,
774 ssb_pcmcia_sprom_check_crc,
775 ssb_pcmcia_sprom_write_all);
776 }
777
778 static DEVICE_ATTR(ssb_sprom, 0600,
779 ssb_pcmcia_attr_sprom_show,
780 ssb_pcmcia_attr_sprom_store);
781
782 static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
783 {
784 u8 val;
785 int err;
786
787 err = ssb_pcmcia_cfg_read(bus, cor, &val);
788 if (err)
789 return err;
790 val &= ~COR_SOFT_RESET;
791 val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
792 err = ssb_pcmcia_cfg_write(bus, cor, val);
793 if (err)
794 return err;
795 msleep(40);
796
797 return 0;
798 }
799
800 /* Initialize the PCMCIA hardware. This is called on Init and Resume. */
801 int ssb_pcmcia_hardware_setup(struct ssb_bus *bus)
802 {
803 int err;
804
805 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
806 return 0;
807
808 /* Switch segment to a known state and sync
809 * bus->mapped_pcmcia_seg with hardware state. */
810 ssb_pcmcia_switch_segment(bus, 0);
811 /* Init the COR register. */
812 err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
813 if (err)
814 return err;
815 /* Some cards also need this register to get poked. */
816 err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
817 if (err)
818 return err;
819
820 return 0;
821 }
822
823 void ssb_pcmcia_exit(struct ssb_bus *bus)
824 {
825 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
826 return;
827
828 device_remove_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
829 }
830
831 int ssb_pcmcia_init(struct ssb_bus *bus)
832 {
833 int err;
834
835 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
836 return 0;
837
838 err = ssb_pcmcia_hardware_setup(bus);
839 if (err)
840 goto error;
841
842 bus->sprom_size = SSB_PCMCIA_SPROM_SIZE;
843 mutex_init(&bus->sprom_mutex);
844 err = device_create_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
845 if (err)
846 goto error;
847
848 return 0;
849 error:
850 ssb_printk(KERN_ERR PFX "Failed to initialize PCMCIA host device\n");
851 return err;
852 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree