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omap: i2c: add a timeout to the busy waiting
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ssb / pcmcia.c
blobe72f4046a5e0ee1cccb46a7bd11362261f9f3e0b
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 <mb@bu3sch.de>
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/cs_types.h>
17 #include <pcmcia/cs.h>
18 #include <pcmcia/cistpl.h>
19 #include <pcmcia/ciscode.h>
20 #include <pcmcia/ds.h>
21 #include <pcmcia/cisreg.h>
22
23 #include "ssb_private.h"
24
25
26 /* Define the following to 1 to enable a printk on each coreswitch. */
27 #define SSB_VERBOSE_PCMCIACORESWITCH_DEBUG 0
28
29
30 /* PCMCIA configuration registers */
31 #define SSB_PCMCIA_ADDRESS0 0x2E
32 #define SSB_PCMCIA_ADDRESS1 0x30
33 #define SSB_PCMCIA_ADDRESS2 0x32
34 #define SSB_PCMCIA_MEMSEG 0x34
35 #define SSB_PCMCIA_SPROMCTL 0x36
36 #define SSB_PCMCIA_SPROMCTL_IDLE 0
37 #define SSB_PCMCIA_SPROMCTL_WRITE 1
38 #define SSB_PCMCIA_SPROMCTL_READ 2
39 #define SSB_PCMCIA_SPROMCTL_WRITEEN 4
40 #define SSB_PCMCIA_SPROMCTL_WRITEDIS 7
41 #define SSB_PCMCIA_SPROMCTL_DONE 8
42 #define SSB_PCMCIA_SPROM_DATALO 0x38
43 #define SSB_PCMCIA_SPROM_DATAHI 0x3A
44 #define SSB_PCMCIA_SPROM_ADDRLO 0x3C
45 #define SSB_PCMCIA_SPROM_ADDRHI 0x3E
46
47 /* Hardware invariants CIS tuples */
48 #define SSB_PCMCIA_CIS 0x80
49 #define SSB_PCMCIA_CIS_ID 0x01
50 #define SSB_PCMCIA_CIS_BOARDREV 0x02
51 #define SSB_PCMCIA_CIS_PA 0x03
52 #define SSB_PCMCIA_CIS_PA_PA0B0_LO 0
53 #define SSB_PCMCIA_CIS_PA_PA0B0_HI 1
54 #define SSB_PCMCIA_CIS_PA_PA0B1_LO 2
55 #define SSB_PCMCIA_CIS_PA_PA0B1_HI 3
56 #define SSB_PCMCIA_CIS_PA_PA0B2_LO 4
57 #define SSB_PCMCIA_CIS_PA_PA0B2_HI 5
58 #define SSB_PCMCIA_CIS_PA_ITSSI 6
59 #define SSB_PCMCIA_CIS_PA_MAXPOW 7
60 #define SSB_PCMCIA_CIS_OEMNAME 0x04
61 #define SSB_PCMCIA_CIS_CCODE 0x05
62 #define SSB_PCMCIA_CIS_ANTENNA 0x06
63 #define SSB_PCMCIA_CIS_ANTGAIN 0x07
64 #define SSB_PCMCIA_CIS_BFLAGS 0x08
65 #define SSB_PCMCIA_CIS_LEDS 0x09
66
67 /* PCMCIA SPROM size. */
68 #define SSB_PCMCIA_SPROM_SIZE 256
69 #define SSB_PCMCIA_SPROM_SIZE_BYTES (SSB_PCMCIA_SPROM_SIZE * sizeof(u16))
70
71
72 /* Write to a PCMCIA configuration register. */
73 static int ssb_pcmcia_cfg_write(struct ssb_bus *bus, u8 offset, u8 value)
74 {
75 conf_reg_t reg;
76 int res;
77
78 memset(&reg, 0, sizeof(reg));
79 reg.Offset = offset;
80 reg.Action = CS_WRITE;
81 reg.Value = value;
82 res = pcmcia_access_configuration_register(bus->host_pcmcia, &reg);
83 if (unlikely(res != 0))
84 return -EBUSY;
85
86 return 0;
87 }
88
89 /* Read from a PCMCIA configuration register. */
90 static int ssb_pcmcia_cfg_read(struct ssb_bus *bus, u8 offset, u8 *value)
91 {
92 conf_reg_t reg;
93 int res;
94
95 memset(&reg, 0, sizeof(reg));
96 reg.Offset = offset;
97 reg.Action = CS_READ;
98 res = pcmcia_access_configuration_register(bus->host_pcmcia, &reg);
99 if (unlikely(res != 0))
100 return -EBUSY;
101 *value = reg.Value;
102
103 return 0;
104 }
105
106 int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
107 u8 coreidx)
108 {
109 int err;
110 int attempts = 0;
111 u32 cur_core;
112 u32 addr;
113 u32 read_addr;
114 u8 val;
115
116 addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
117 while (1) {
118 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS0,
119 (addr & 0x0000F000) >> 12);
120 if (err)
121 goto error;
122 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS1,
123 (addr & 0x00FF0000) >> 16);
124 if (err)
125 goto error;
126 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS2,
127 (addr & 0xFF000000) >> 24);
128 if (err)
129 goto error;
130
131 read_addr = 0;
132
133 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS0, &val);
134 if (err)
135 goto error;
136 read_addr |= ((u32)(val & 0x0F)) << 12;
137 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS1, &val);
138 if (err)
139 goto error;
140 read_addr |= ((u32)val) << 16;
141 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS2, &val);
142 if (err)
143 goto error;
144 read_addr |= ((u32)val) << 24;
145
146 cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
147 if (cur_core == coreidx)
148 break;
149
150 err = -ETIMEDOUT;
151 if (attempts++ > SSB_BAR0_MAX_RETRIES)
152 goto error;
153 udelay(10);
154 }
155
156 return 0;
157 error:
158 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
159 return err;
160 }
161
162 int ssb_pcmcia_switch_core(struct ssb_bus *bus,
163 struct ssb_device *dev)
164 {
165 int err;
166
167 #if SSB_VERBOSE_PCMCIACORESWITCH_DEBUG
168 ssb_printk(KERN_INFO PFX
169 "Switching to %s core, index %d\n",
170 ssb_core_name(dev->id.coreid),
171 dev->core_index);
172 #endif
173
174 err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
175 if (!err)
176 bus->mapped_device = dev;
177
178 return err;
179 }
180
181 int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
182 {
183 int attempts = 0;
184 int err;
185 u8 val;
186
187 SSB_WARN_ON((seg != 0) && (seg != 1));
188 while (1) {
189 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_MEMSEG, seg);
190 if (err)
191 goto error;
192 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_MEMSEG, &val);
193 if (err)
194 goto error;
195 if (val == seg)
196 break;
197
198 err = -ETIMEDOUT;
199 if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
200 goto error;
201 udelay(10);
202 }
203 bus->mapped_pcmcia_seg = seg;
204
205 return 0;
206 error:
207 ssb_printk(KERN_ERR PFX "Failed to switch pcmcia segment\n");
208 return err;
209 }
210
211 static int select_core_and_segment(struct ssb_device *dev,
212 u16 *offset)
213 {
214 struct ssb_bus *bus = dev->bus;
215 int err;
216 u8 need_segment;
217
218 if (*offset >= 0x800) {
219 *offset -= 0x800;
220 need_segment = 1;
221 } else
222 need_segment = 0;
223
224 if (unlikely(dev != bus->mapped_device)) {
225 err = ssb_pcmcia_switch_core(bus, dev);
226 if (unlikely(err))
227 return err;
228 }
229 if (unlikely(need_segment != bus->mapped_pcmcia_seg)) {
230 err = ssb_pcmcia_switch_segment(bus, need_segment);
231 if (unlikely(err))
232 return err;
233 }
234
235 return 0;
236 }
237
238 static u8 ssb_pcmcia_read8(struct ssb_device *dev, u16 offset)
239 {
240 struct ssb_bus *bus = dev->bus;
241 unsigned long flags;
242 int err;
243 u8 value = 0xFF;
244
245 spin_lock_irqsave(&bus->bar_lock, flags);
246 err = select_core_and_segment(dev, &offset);
247 if (likely(!err))
248 value = readb(bus->mmio + offset);
249 spin_unlock_irqrestore(&bus->bar_lock, flags);
250
251 return value;
252 }
253
254 static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
255 {
256 struct ssb_bus *bus = dev->bus;
257 unsigned long flags;
258 int err;
259 u16 value = 0xFFFF;
260
261 spin_lock_irqsave(&bus->bar_lock, flags);
262 err = select_core_and_segment(dev, &offset);
263 if (likely(!err))
264 value = readw(bus->mmio + offset);
265 spin_unlock_irqrestore(&bus->bar_lock, flags);
266
267 return value;
268 }
269
270 static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
271 {
272 struct ssb_bus *bus = dev->bus;
273 unsigned long flags;
274 int err;
275 u32 lo = 0xFFFFFFFF, hi = 0xFFFFFFFF;
276
277 spin_lock_irqsave(&bus->bar_lock, flags);
278 err = select_core_and_segment(dev, &offset);
279 if (likely(!err)) {
280 lo = readw(bus->mmio + offset);
281 hi = readw(bus->mmio + offset + 2);
282 }
283 spin_unlock_irqrestore(&bus->bar_lock, flags);
284
285 return (lo | (hi << 16));
286 }
287
288 #ifdef CONFIG_SSB_BLOCKIO
289 static void ssb_pcmcia_block_read(struct ssb_device *dev, void *buffer,
290 size_t count, u16 offset, u8 reg_width)
291 {
292 struct ssb_bus *bus = dev->bus;
293 unsigned long flags;
294 void __iomem *addr = bus->mmio + offset;
295 int err;
296
297 spin_lock_irqsave(&bus->bar_lock, flags);
298 err = select_core_and_segment(dev, &offset);
299 if (unlikely(err)) {
300 memset(buffer, 0xFF, count);
301 goto unlock;
302 }
303 switch (reg_width) {
304 case sizeof(u8): {
305 u8 *buf = buffer;
306
307 while (count) {
308 *buf = __raw_readb(addr);
309 buf++;
310 count--;
311 }
312 break;
313 }
314 case sizeof(u16): {
315 __le16 *buf = buffer;
316
317 SSB_WARN_ON(count & 1);
318 while (count) {
319 *buf = (__force __le16)__raw_readw(addr);
320 buf++;
321 count -= 2;
322 }
323 break;
324 }
325 case sizeof(u32): {
326 __le16 *buf = buffer;
327
328 SSB_WARN_ON(count & 3);
329 while (count) {
330 *buf = (__force __le16)__raw_readw(addr);
331 buf++;
332 *buf = (__force __le16)__raw_readw(addr + 2);
333 buf++;
334 count -= 4;
335 }
336 break;
337 }
338 default:
339 SSB_WARN_ON(1);
340 }
341 unlock:
342 spin_unlock_irqrestore(&bus->bar_lock, flags);
343 }
344 #endif /* CONFIG_SSB_BLOCKIO */
345
346 static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value)
347 {
348 struct ssb_bus *bus = dev->bus;
349 unsigned long flags;
350 int err;
351
352 spin_lock_irqsave(&bus->bar_lock, flags);
353 err = select_core_and_segment(dev, &offset);
354 if (likely(!err))
355 writeb(value, bus->mmio + offset);
356 mmiowb();
357 spin_unlock_irqrestore(&bus->bar_lock, flags);
358 }
359
360 static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
361 {
362 struct ssb_bus *bus = dev->bus;
363 unsigned long flags;
364 int err;
365
366 spin_lock_irqsave(&bus->bar_lock, flags);
367 err = select_core_and_segment(dev, &offset);
368 if (likely(!err))
369 writew(value, bus->mmio + offset);
370 mmiowb();
371 spin_unlock_irqrestore(&bus->bar_lock, flags);
372 }
373
374 static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
375 {
376 struct ssb_bus *bus = dev->bus;
377 unsigned long flags;
378 int err;
379
380 spin_lock_irqsave(&bus->bar_lock, flags);
381 err = select_core_and_segment(dev, &offset);
382 if (likely(!err)) {
383 writew((value & 0x0000FFFF), bus->mmio + offset);
384 writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
385 }
386 mmiowb();
387 spin_unlock_irqrestore(&bus->bar_lock, flags);
388 }
389
390 #ifdef CONFIG_SSB_BLOCKIO
391 static void ssb_pcmcia_block_write(struct ssb_device *dev, const void *buffer,
392 size_t count, u16 offset, u8 reg_width)
393 {
394 struct ssb_bus *bus = dev->bus;
395 unsigned long flags;
396 void __iomem *addr = bus->mmio + offset;
397 int err;
398
399 spin_lock_irqsave(&bus->bar_lock, flags);
400 err = select_core_and_segment(dev, &offset);
401 if (unlikely(err))
402 goto unlock;
403 switch (reg_width) {
404 case sizeof(u8): {
405 const u8 *buf = buffer;
406
407 while (count) {
408 __raw_writeb(*buf, addr);
409 buf++;
410 count--;
411 }
412 break;
413 }
414 case sizeof(u16): {
415 const __le16 *buf = buffer;
416
417 SSB_WARN_ON(count & 1);
418 while (count) {
419 __raw_writew((__force u16)(*buf), addr);
420 buf++;
421 count -= 2;
422 }
423 break;
424 }
425 case sizeof(u32): {
426 const __le16 *buf = buffer;
427
428 SSB_WARN_ON(count & 3);
429 while (count) {
430 __raw_writew((__force u16)(*buf), addr);
431 buf++;
432 __raw_writew((__force u16)(*buf), addr + 2);
433 buf++;
434 count -= 4;
435 }
436 break;
437 }
438 default:
439 SSB_WARN_ON(1);
440 }
441 unlock:
442 mmiowb();
443 spin_unlock_irqrestore(&bus->bar_lock, flags);
444 }
445 #endif /* CONFIG_SSB_BLOCKIO */
446
447 /* Not "static", as it's used in main.c */
448 const struct ssb_bus_ops ssb_pcmcia_ops = {
449 .read8 = ssb_pcmcia_read8,
450 .read16 = ssb_pcmcia_read16,
451 .read32 = ssb_pcmcia_read32,
452 .write8 = ssb_pcmcia_write8,
453 .write16 = ssb_pcmcia_write16,
454 .write32 = ssb_pcmcia_write32,
455 #ifdef CONFIG_SSB_BLOCKIO
456 .block_read = ssb_pcmcia_block_read,
457 .block_write = ssb_pcmcia_block_write,
458 #endif
459 };
460
461 static int ssb_pcmcia_sprom_command(struct ssb_bus *bus, u8 command)
462 {
463 unsigned int i;
464 int err;
465 u8 value;
466
467 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROMCTL, command);
468 if (err)
469 return err;
470 for (i = 0; i < 1000; i++) {
471 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROMCTL, &value);
472 if (err)
473 return err;
474 if (value & SSB_PCMCIA_SPROMCTL_DONE)
475 return 0;
476 udelay(10);
477 }
478
479 return -ETIMEDOUT;
480 }
481
482 /* offset is the 16bit word offset */
483 static int ssb_pcmcia_sprom_read(struct ssb_bus *bus, u16 offset, u16 *value)
484 {
485 int err;
486 u8 lo, hi;
487
488 offset *= 2; /* Make byte offset */
489
490 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
491 (offset & 0x00FF));
492 if (err)
493 return err;
494 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
495 (offset & 0xFF00) >> 8);
496 if (err)
497 return err;
498 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_READ);
499 if (err)
500 return err;
501 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATALO, &lo);
502 if (err)
503 return err;
504 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATAHI, &hi);
505 if (err)
506 return err;
507 *value = (lo | (((u16)hi) << 8));
508
509 return 0;
510 }
511
512 /* offset is the 16bit word offset */
513 static int ssb_pcmcia_sprom_write(struct ssb_bus *bus, u16 offset, u16 value)
514 {
515 int err;
516
517 offset *= 2; /* Make byte offset */
518
519 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
520 (offset & 0x00FF));
521 if (err)
522 return err;
523 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
524 (offset & 0xFF00) >> 8);
525 if (err)
526 return err;
527 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATALO,
528 (value & 0x00FF));
529 if (err)
530 return err;
531 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATAHI,
532 (value & 0xFF00) >> 8);
533 if (err)
534 return err;
535 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITE);
536 if (err)
537 return err;
538 msleep(20);
539
540 return 0;
541 }
542
543 /* Read the SPROM image. bufsize is in 16bit words. */
544 static int ssb_pcmcia_sprom_read_all(struct ssb_bus *bus, u16 *sprom)
545 {
546 int err, i;
547
548 for (i = 0; i < SSB_PCMCIA_SPROM_SIZE; i++) {
549 err = ssb_pcmcia_sprom_read(bus, i, &sprom[i]);
550 if (err)
551 return err;
552 }
553
554 return 0;
555 }
556
557 /* Write the SPROM image. size is in 16bit words. */
558 static int ssb_pcmcia_sprom_write_all(struct ssb_bus *bus, const u16 *sprom)
559 {
560 int i, err;
561 bool failed = 0;
562 size_t size = SSB_PCMCIA_SPROM_SIZE;
563
564 ssb_printk(KERN_NOTICE PFX
565 "Writing SPROM. Do NOT turn off the power! "
566 "Please stand by...\n");
567 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEEN);
568 if (err) {
569 ssb_printk(KERN_NOTICE PFX
570 "Could not enable SPROM write access.\n");
571 return -EBUSY;
572 }
573 ssb_printk(KERN_NOTICE PFX "[ 0%%");
574 msleep(500);
575 for (i = 0; i < size; i++) {
576 if (i == size / 4)
577 ssb_printk("25%%");
578 else if (i == size / 2)
579 ssb_printk("50%%");
580 else if (i == (size * 3) / 4)
581 ssb_printk("75%%");
582 else if (i % 2)
583 ssb_printk(".");
584 err = ssb_pcmcia_sprom_write(bus, i, sprom[i]);
585 if (err) {
586 ssb_printk(KERN_NOTICE PFX
587 "Failed to write to SPROM.\n");
588 failed = 1;
589 break;
590 }
591 }
592 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEDIS);
593 if (err) {
594 ssb_printk(KERN_NOTICE PFX
595 "Could not disable SPROM write access.\n");
596 failed = 1;
597 }
598 msleep(500);
599 if (!failed) {
600 ssb_printk("100%% ]\n");
601 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
602 }
603
604 return failed ? -EBUSY : 0;
605 }
606
607 static int ssb_pcmcia_sprom_check_crc(const u16 *sprom, size_t size)
608 {
609 //TODO
610 return 0;
611 }
612
613 #define GOTO_ERROR_ON(condition, description) do { \
614 if (unlikely(condition)) { \
615 error_description = description; \
616 goto error; \
617 } \
618 } while (0)
619
620 static int ssb_pcmcia_get_mac(struct pcmcia_device *p_dev,
621 tuple_t *tuple,
622 void *priv)
623 {
624 struct ssb_sprom *sprom = priv;
625
626 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
627 return -EINVAL;
628 if (tuple->TupleDataLen != ETH_ALEN + 2)
629 return -EINVAL;
630 if (tuple->TupleData[1] != ETH_ALEN)
631 return -EINVAL;
632 memcpy(sprom->il0mac, &tuple->TupleData[2], ETH_ALEN);
633 return 0;
634 };
635
636 static int ssb_pcmcia_do_get_invariants(struct pcmcia_device *p_dev,
637 tuple_t *tuple,
638 void *priv)
639 {
640 struct ssb_init_invariants *iv = priv;
641 struct ssb_sprom *sprom = &iv->sprom;
642 struct ssb_boardinfo *bi = &iv->boardinfo;
643 const char *error_description;
644
645 GOTO_ERROR_ON(tuple->TupleDataLen < 1, "VEN tpl < 1");
646 switch (tuple->TupleData[0]) {
647 case SSB_PCMCIA_CIS_ID:
648 GOTO_ERROR_ON((tuple->TupleDataLen != 5) &&
649 (tuple->TupleDataLen != 7),
650 "id tpl size");
651 bi->vendor = tuple->TupleData[1] |
652 ((u16)tuple->TupleData[2] << 8);
653 break;
654 case SSB_PCMCIA_CIS_BOARDREV:
655 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
656 "boardrev tpl size");
657 sprom->board_rev = tuple->TupleData[1];
658 break;
659 case SSB_PCMCIA_CIS_PA:
660 GOTO_ERROR_ON((tuple->TupleDataLen != 9) &&
661 (tuple->TupleDataLen != 10),
662 "pa tpl size");
663 sprom->pa0b0 = tuple->TupleData[1] |
664 ((u16)tuple->TupleData[2] << 8);
665 sprom->pa0b1 = tuple->TupleData[3] |
666 ((u16)tuple->TupleData[4] << 8);
667 sprom->pa0b2 = tuple->TupleData[5] |
668 ((u16)tuple->TupleData[6] << 8);
669 sprom->itssi_a = tuple->TupleData[7];
670 sprom->itssi_bg = tuple->TupleData[7];
671 sprom->maxpwr_a = tuple->TupleData[8];
672 sprom->maxpwr_bg = tuple->TupleData[8];
673 break;
674 case SSB_PCMCIA_CIS_OEMNAME:
675 /* We ignore this. */
676 break;
677 case SSB_PCMCIA_CIS_CCODE:
678 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
679 "ccode tpl size");
680 sprom->country_code = tuple->TupleData[1];
681 break;
682 case SSB_PCMCIA_CIS_ANTENNA:
683 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
684 "ant tpl size");
685 sprom->ant_available_a = tuple->TupleData[1];
686 sprom->ant_available_bg = tuple->TupleData[1];
687 break;
688 case SSB_PCMCIA_CIS_ANTGAIN:
689 GOTO_ERROR_ON(tuple->TupleDataLen != 2,
690 "antg tpl size");
691 sprom->antenna_gain.ghz24.a0 = tuple->TupleData[1];
692 sprom->antenna_gain.ghz24.a1 = tuple->TupleData[1];
693 sprom->antenna_gain.ghz24.a2 = tuple->TupleData[1];
694 sprom->antenna_gain.ghz24.a3 = tuple->TupleData[1];
695 sprom->antenna_gain.ghz5.a0 = tuple->TupleData[1];
696 sprom->antenna_gain.ghz5.a1 = tuple->TupleData[1];
697 sprom->antenna_gain.ghz5.a2 = tuple->TupleData[1];
698 sprom->antenna_gain.ghz5.a3 = tuple->TupleData[1];
699 break;
700 case SSB_PCMCIA_CIS_BFLAGS:
701 GOTO_ERROR_ON((tuple->TupleDataLen != 3) &&
702 (tuple->TupleDataLen != 5),
703 "bfl tpl size");
704 sprom->boardflags_lo = tuple->TupleData[1] |
705 ((u16)tuple->TupleData[2] << 8);
706 break;
707 case SSB_PCMCIA_CIS_LEDS:
708 GOTO_ERROR_ON(tuple->TupleDataLen != 5,
709 "leds tpl size");
710 sprom->gpio0 = tuple->TupleData[1];
711 sprom->gpio1 = tuple->TupleData[2];
712 sprom->gpio2 = tuple->TupleData[3];
713 sprom->gpio3 = tuple->TupleData[4];
714 break;
715 }
716 return -ENOSPC; /* continue with next entry */
717
718 error:
719 ssb_printk(KERN_ERR PFX
720 "PCMCIA: Failed to fetch device invariants: %s\n",
721 error_description);
722 return -ENODEV;
723 }
724
725
726 int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
727 struct ssb_init_invariants *iv)
728 {
729 struct ssb_sprom *sprom = &iv->sprom;
730 int res;
731
732 memset(sprom, 0xFF, sizeof(*sprom));
733 sprom->revision = 1;
734 sprom->boardflags_lo = 0;
735 sprom->boardflags_hi = 0;
736
737 /* First fetch the MAC address. */
738 res = pcmcia_loop_tuple(bus->host_pcmcia, CISTPL_FUNCE,
739 ssb_pcmcia_get_mac, sprom);
740 if (res != 0) {
741 ssb_printk(KERN_ERR PFX
742 "PCMCIA: Failed to fetch MAC address\n");
743 return -ENODEV;
744 }
745
746 /* Fetch the vendor specific tuples. */
747 res = pcmcia_loop_tuple(bus->host_pcmcia, SSB_PCMCIA_CIS,
748 ssb_pcmcia_do_get_invariants, sprom);
749 if ((res == 0) || (res == -ENOSPC))
750 return 0;
751
752 ssb_printk(KERN_ERR PFX
753 "PCMCIA: Failed to fetch device invariants\n");
754 return -ENODEV;
755 }
756
757 static ssize_t ssb_pcmcia_attr_sprom_show(struct device *pcmciadev,
758 struct device_attribute *attr,
759 char *buf)
760 {
761 struct pcmcia_device *pdev =
762 container_of(pcmciadev, struct pcmcia_device, dev);
763 struct ssb_bus *bus;
764
765 bus = ssb_pcmcia_dev_to_bus(pdev);
766 if (!bus)
767 return -ENODEV;
768
769 return ssb_attr_sprom_show(bus, buf,
770 ssb_pcmcia_sprom_read_all);
771 }
772
773 static ssize_t ssb_pcmcia_attr_sprom_store(struct device *pcmciadev,
774 struct device_attribute *attr,
775 const char *buf, size_t count)
776 {
777 struct pcmcia_device *pdev =
778 container_of(pcmciadev, struct pcmcia_device, dev);
779 struct ssb_bus *bus;
780
781 bus = ssb_pcmcia_dev_to_bus(pdev);
782 if (!bus)
783 return -ENODEV;
784
785 return ssb_attr_sprom_store(bus, buf, count,
786 ssb_pcmcia_sprom_check_crc,
787 ssb_pcmcia_sprom_write_all);
788 }
789
790 static DEVICE_ATTR(ssb_sprom, 0600,
791 ssb_pcmcia_attr_sprom_show,
792 ssb_pcmcia_attr_sprom_store);
793
794 static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
795 {
796 u8 val;
797 int err;
798
799 err = ssb_pcmcia_cfg_read(bus, cor, &val);
800 if (err)
801 return err;
802 val &= ~COR_SOFT_RESET;
803 val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
804 err = ssb_pcmcia_cfg_write(bus, cor, val);
805 if (err)
806 return err;
807 msleep(40);
808
809 return 0;
810 }
811
812 /* Initialize the PCMCIA hardware. This is called on Init and Resume. */
813 int ssb_pcmcia_hardware_setup(struct ssb_bus *bus)
814 {
815 int err;
816
817 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
818 return 0;
819
820 /* Switch segment to a known state and sync
821 * bus->mapped_pcmcia_seg with hardware state. */
822 ssb_pcmcia_switch_segment(bus, 0);
823 /* Init the COR register. */
824 err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
825 if (err)
826 return err;
827 /* Some cards also need this register to get poked. */
828 err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
829 if (err)
830 return err;
831
832 return 0;
833 }
834
835 void ssb_pcmcia_exit(struct ssb_bus *bus)
836 {
837 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
838 return;
839
840 device_remove_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
841 }
842
843 int ssb_pcmcia_init(struct ssb_bus *bus)
844 {
845 int err;
846
847 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
848 return 0;
849
850 err = ssb_pcmcia_hardware_setup(bus);
851 if (err)
852 goto error;
853
854 bus->sprom_size = SSB_PCMCIA_SPROM_SIZE;
855 mutex_init(&bus->sprom_mutex);
856 err = device_create_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
857 if (err)
858 goto error;
859
860 return 0;
861 error:
862 ssb_printk(KERN_ERR PFX "Failed to initialize PCMCIA host device\n");
863 return err;
864 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree