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ssb: Turn suspend/resume upside down
[deliverable/linux.git] / drivers / ssb / pcmcia.c
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 != CS_SUCCESS))
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 != CS_SUCCESS))
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 static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value)
289 {
290 struct ssb_bus *bus = dev->bus;
291 unsigned long flags;
292 int err;
293
294 spin_lock_irqsave(&bus->bar_lock, flags);
295 err = select_core_and_segment(dev, &offset);
296 if (likely(!err))
297 writeb(value, bus->mmio + offset);
298 mmiowb();
299 spin_unlock_irqrestore(&bus->bar_lock, flags);
300 }
301
302 static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
303 {
304 struct ssb_bus *bus = dev->bus;
305 unsigned long flags;
306 int err;
307
308 spin_lock_irqsave(&bus->bar_lock, flags);
309 err = select_core_and_segment(dev, &offset);
310 if (likely(!err))
311 writew(value, bus->mmio + offset);
312 mmiowb();
313 spin_unlock_irqrestore(&bus->bar_lock, flags);
314 }
315
316 static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
317 {
318 struct ssb_bus *bus = dev->bus;
319 unsigned long flags;
320 int err;
321
322 spin_lock_irqsave(&bus->bar_lock, flags);
323 err = select_core_and_segment(dev, &offset);
324 if (likely(!err)) {
325 writew((value & 0x0000FFFF), bus->mmio + offset);
326 writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
327 }
328 mmiowb();
329 spin_unlock_irqrestore(&bus->bar_lock, flags);
330 }
331
332 /* Not "static", as it's used in main.c */
333 const struct ssb_bus_ops ssb_pcmcia_ops = {
334 .read8 = ssb_pcmcia_read8,
335 .read16 = ssb_pcmcia_read16,
336 .read32 = ssb_pcmcia_read32,
337 .write8 = ssb_pcmcia_write8,
338 .write16 = ssb_pcmcia_write16,
339 .write32 = ssb_pcmcia_write32,
340 };
341
342 static int ssb_pcmcia_sprom_command(struct ssb_bus *bus, u8 command)
343 {
344 unsigned int i;
345 int err;
346 u8 value;
347
348 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROMCTL, command);
349 if (err)
350 return err;
351 for (i = 0; i < 1000; i++) {
352 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROMCTL, &value);
353 if (err)
354 return err;
355 if (value & SSB_PCMCIA_SPROMCTL_DONE)
356 return 0;
357 udelay(10);
358 }
359
360 return -ETIMEDOUT;
361 }
362
363 /* offset is the 16bit word offset */
364 static int ssb_pcmcia_sprom_read(struct ssb_bus *bus, u16 offset, u16 *value)
365 {
366 int err;
367 u8 lo, hi;
368
369 offset *= 2; /* Make byte offset */
370
371 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
372 (offset & 0x00FF));
373 if (err)
374 return err;
375 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
376 (offset & 0xFF00) >> 8);
377 if (err)
378 return err;
379 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_READ);
380 if (err)
381 return err;
382 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATALO, &lo);
383 if (err)
384 return err;
385 err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATAHI, &hi);
386 if (err)
387 return err;
388 *value = (lo | (((u16)hi) << 8));
389
390 return 0;
391 }
392
393 /* offset is the 16bit word offset */
394 static int ssb_pcmcia_sprom_write(struct ssb_bus *bus, u16 offset, u16 value)
395 {
396 int err;
397
398 offset *= 2; /* Make byte offset */
399
400 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
401 (offset & 0x00FF));
402 if (err)
403 return err;
404 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
405 (offset & 0xFF00) >> 8);
406 if (err)
407 return err;
408 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATALO,
409 (value & 0x00FF));
410 if (err)
411 return err;
412 err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATAHI,
413 (value & 0xFF00) >> 8);
414 if (err)
415 return err;
416 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITE);
417 if (err)
418 return err;
419 msleep(20);
420
421 return 0;
422 }
423
424 /* Read the SPROM image. bufsize is in 16bit words. */
425 static int ssb_pcmcia_sprom_read_all(struct ssb_bus *bus, u16 *sprom)
426 {
427 int err, i;
428
429 for (i = 0; i < SSB_PCMCIA_SPROM_SIZE; i++) {
430 err = ssb_pcmcia_sprom_read(bus, i, &sprom[i]);
431 if (err)
432 return err;
433 }
434
435 return 0;
436 }
437
438 /* Write the SPROM image. size is in 16bit words. */
439 static int ssb_pcmcia_sprom_write_all(struct ssb_bus *bus, const u16 *sprom)
440 {
441 int i, err;
442 bool failed = 0;
443 size_t size = SSB_PCMCIA_SPROM_SIZE;
444
445 ssb_printk(KERN_NOTICE PFX
446 "Writing SPROM. Do NOT turn off the power! "
447 "Please stand by...\n");
448 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEEN);
449 if (err) {
450 ssb_printk(KERN_NOTICE PFX
451 "Could not enable SPROM write access.\n");
452 return -EBUSY;
453 }
454 ssb_printk(KERN_NOTICE PFX "[ 0%%");
455 msleep(500);
456 for (i = 0; i < size; i++) {
457 if (i == size / 4)
458 ssb_printk("25%%");
459 else if (i == size / 2)
460 ssb_printk("50%%");
461 else if (i == (size * 3) / 4)
462 ssb_printk("75%%");
463 else if (i % 2)
464 ssb_printk(".");
465 err = ssb_pcmcia_sprom_write(bus, i, sprom[i]);
466 if (err) {
467 ssb_printk("\n" KERN_NOTICE PFX
468 "Failed to write to SPROM.\n");
469 failed = 1;
470 break;
471 }
472 }
473 err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEDIS);
474 if (err) {
475 ssb_printk("\n" KERN_NOTICE PFX
476 "Could not disable SPROM write access.\n");
477 failed = 1;
478 }
479 msleep(500);
480 if (!failed) {
481 ssb_printk("100%% ]\n");
482 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
483 }
484
485 return failed ? -EBUSY : 0;
486 }
487
488 static int ssb_pcmcia_sprom_check_crc(const u16 *sprom, size_t size)
489 {
490 //TODO
491 return 0;
492 }
493
494 #define GOTO_ERROR_ON(condition, description) do { \
495 if (unlikely(condition)) { \
496 error_description = description; \
497 goto error; \
498 } \
499 } while (0)
500
501 int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
502 struct ssb_init_invariants *iv)
503 {
504 tuple_t tuple;
505 int res;
506 unsigned char buf[32];
507 struct ssb_sprom *sprom = &iv->sprom;
508 struct ssb_boardinfo *bi = &iv->boardinfo;
509 const char *error_description;
510
511 memset(sprom, 0xFF, sizeof(*sprom));
512 sprom->revision = 1;
513 sprom->boardflags_lo = 0;
514 sprom->boardflags_hi = 0;
515
516 /* First fetch the MAC address. */
517 memset(&tuple, 0, sizeof(tuple));
518 tuple.DesiredTuple = CISTPL_FUNCE;
519 tuple.TupleData = buf;
520 tuple.TupleDataMax = sizeof(buf);
521 res = pcmcia_get_first_tuple(bus->host_pcmcia, &tuple);
522 GOTO_ERROR_ON(res != CS_SUCCESS, "MAC first tpl");
523 res = pcmcia_get_tuple_data(bus->host_pcmcia, &tuple);
524 GOTO_ERROR_ON(res != CS_SUCCESS, "MAC first tpl data");
525 while (1) {
526 GOTO_ERROR_ON(tuple.TupleDataLen < 1, "MAC tpl < 1");
527 if (tuple.TupleData[0] == CISTPL_FUNCE_LAN_NODE_ID)
528 break;
529 res = pcmcia_get_next_tuple(bus->host_pcmcia, &tuple);
530 GOTO_ERROR_ON(res != CS_SUCCESS, "MAC next tpl");
531 res = pcmcia_get_tuple_data(bus->host_pcmcia, &tuple);
532 GOTO_ERROR_ON(res != CS_SUCCESS, "MAC next tpl data");
533 }
534 GOTO_ERROR_ON(tuple.TupleDataLen != ETH_ALEN + 2, "MAC tpl size");
535 memcpy(sprom->il0mac, &tuple.TupleData[2], ETH_ALEN);
536
537 /* Fetch the vendor specific tuples. */
538 memset(&tuple, 0, sizeof(tuple));
539 tuple.DesiredTuple = SSB_PCMCIA_CIS;
540 tuple.TupleData = buf;
541 tuple.TupleDataMax = sizeof(buf);
542 res = pcmcia_get_first_tuple(bus->host_pcmcia, &tuple);
543 GOTO_ERROR_ON(res != CS_SUCCESS, "VEN first tpl");
544 res = pcmcia_get_tuple_data(bus->host_pcmcia, &tuple);
545 GOTO_ERROR_ON(res != CS_SUCCESS, "VEN first tpl data");
546 while (1) {
547 GOTO_ERROR_ON(tuple.TupleDataLen < 1, "VEN tpl < 1");
548 switch (tuple.TupleData[0]) {
549 case SSB_PCMCIA_CIS_ID:
550 GOTO_ERROR_ON((tuple.TupleDataLen != 5) &&
551 (tuple.TupleDataLen != 7),
552 "id tpl size");
553 bi->vendor = tuple.TupleData[1] |
554 ((u16)tuple.TupleData[2] << 8);
555 break;
556 case SSB_PCMCIA_CIS_BOARDREV:
557 GOTO_ERROR_ON(tuple.TupleDataLen != 2,
558 "boardrev tpl size");
559 sprom->board_rev = tuple.TupleData[1];
560 break;
561 case SSB_PCMCIA_CIS_PA:
562 GOTO_ERROR_ON(tuple.TupleDataLen != 9,
563 "pa tpl size");
564 sprom->pa0b0 = tuple.TupleData[1] |
565 ((u16)tuple.TupleData[2] << 8);
566 sprom->pa0b1 = tuple.TupleData[3] |
567 ((u16)tuple.TupleData[4] << 8);
568 sprom->pa0b2 = tuple.TupleData[5] |
569 ((u16)tuple.TupleData[6] << 8);
570 sprom->itssi_a = tuple.TupleData[7];
571 sprom->itssi_bg = tuple.TupleData[7];
572 sprom->maxpwr_a = tuple.TupleData[8];
573 sprom->maxpwr_bg = tuple.TupleData[8];
574 break;
575 case SSB_PCMCIA_CIS_OEMNAME:
576 /* We ignore this. */
577 break;
578 case SSB_PCMCIA_CIS_CCODE:
579 GOTO_ERROR_ON(tuple.TupleDataLen != 2,
580 "ccode tpl size");
581 sprom->country_code = tuple.TupleData[1];
582 break;
583 case SSB_PCMCIA_CIS_ANTENNA:
584 GOTO_ERROR_ON(tuple.TupleDataLen != 2,
585 "ant tpl size");
586 sprom->ant_available_a = tuple.TupleData[1];
587 sprom->ant_available_bg = tuple.TupleData[1];
588 break;
589 case SSB_PCMCIA_CIS_ANTGAIN:
590 GOTO_ERROR_ON(tuple.TupleDataLen != 2,
591 "antg tpl size");
592 sprom->antenna_gain.ghz24.a0 = tuple.TupleData[1];
593 sprom->antenna_gain.ghz24.a1 = tuple.TupleData[1];
594 sprom->antenna_gain.ghz24.a2 = tuple.TupleData[1];
595 sprom->antenna_gain.ghz24.a3 = tuple.TupleData[1];
596 sprom->antenna_gain.ghz5.a0 = tuple.TupleData[1];
597 sprom->antenna_gain.ghz5.a1 = tuple.TupleData[1];
598 sprom->antenna_gain.ghz5.a2 = tuple.TupleData[1];
599 sprom->antenna_gain.ghz5.a3 = tuple.TupleData[1];
600 break;
601 case SSB_PCMCIA_CIS_BFLAGS:
602 GOTO_ERROR_ON(tuple.TupleDataLen != 3,
603 "bfl tpl size");
604 sprom->boardflags_lo = tuple.TupleData[1] |
605 ((u16)tuple.TupleData[2] << 8);
606 break;
607 case SSB_PCMCIA_CIS_LEDS:
608 GOTO_ERROR_ON(tuple.TupleDataLen != 5,
609 "leds tpl size");
610 sprom->gpio0 = tuple.TupleData[1];
611 sprom->gpio1 = tuple.TupleData[2];
612 sprom->gpio2 = tuple.TupleData[3];
613 sprom->gpio3 = tuple.TupleData[4];
614 break;
615 }
616 res = pcmcia_get_next_tuple(bus->host_pcmcia, &tuple);
617 if (res == CS_NO_MORE_ITEMS)
618 break;
619 GOTO_ERROR_ON(res != CS_SUCCESS, "VEN next tpl");
620 res = pcmcia_get_tuple_data(bus->host_pcmcia, &tuple);
621 GOTO_ERROR_ON(res != CS_SUCCESS, "VEN next tpl data");
622 }
623
624 return 0;
625 error:
626 ssb_printk(KERN_ERR PFX
627 "PCMCIA: Failed to fetch device invariants: %s\n",
628 error_description);
629 return -ENODEV;
630 }
631
632 static ssize_t ssb_pcmcia_attr_sprom_show(struct device *pcmciadev,
633 struct device_attribute *attr,
634 char *buf)
635 {
636 struct pcmcia_device *pdev =
637 container_of(pcmciadev, struct pcmcia_device, dev);
638 struct ssb_bus *bus;
639
640 bus = ssb_pcmcia_dev_to_bus(pdev);
641 if (!bus)
642 return -ENODEV;
643
644 return ssb_attr_sprom_show(bus, buf,
645 ssb_pcmcia_sprom_read_all);
646 }
647
648 static ssize_t ssb_pcmcia_attr_sprom_store(struct device *pcmciadev,
649 struct device_attribute *attr,
650 const char *buf, size_t count)
651 {
652 struct pcmcia_device *pdev =
653 container_of(pcmciadev, struct pcmcia_device, dev);
654 struct ssb_bus *bus;
655
656 bus = ssb_pcmcia_dev_to_bus(pdev);
657 if (!bus)
658 return -ENODEV;
659
660 return ssb_attr_sprom_store(bus, buf, count,
661 ssb_pcmcia_sprom_check_crc,
662 ssb_pcmcia_sprom_write_all);
663 }
664
665 static DEVICE_ATTR(ssb_sprom, 0600,
666 ssb_pcmcia_attr_sprom_show,
667 ssb_pcmcia_attr_sprom_store);
668
669 static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
670 {
671 u8 val;
672 int err;
673
674 err = ssb_pcmcia_cfg_read(bus, cor, &val);
675 if (err)
676 return err;
677 val &= ~COR_SOFT_RESET;
678 val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
679 err = ssb_pcmcia_cfg_write(bus, cor, val);
680 if (err)
681 return err;
682 msleep(40);
683
684 return 0;
685 }
686
687 /* Initialize the PCMCIA hardware. This is called on Init and Resume. */
688 int ssb_pcmcia_hardware_setup(struct ssb_bus *bus)
689 {
690 int err;
691
692 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
693 return 0;
694
695 /* Switch segment to a known state and sync
696 * bus->mapped_pcmcia_seg with hardware state. */
697 ssb_pcmcia_switch_segment(bus, 0);
698 /* Init the COR register. */
699 err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
700 if (err)
701 return err;
702 /* Some cards also need this register to get poked. */
703 err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
704 if (err)
705 return err;
706
707 return 0;
708 }
709
710 void ssb_pcmcia_exit(struct ssb_bus *bus)
711 {
712 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
713 return;
714
715 device_remove_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
716 }
717
718 int ssb_pcmcia_init(struct ssb_bus *bus)
719 {
720 int err;
721
722 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
723 return 0;
724
725 err = ssb_pcmcia_hardware_setup(bus);
726 if (err)
727 goto error;
728
729 bus->sprom_size = SSB_PCMCIA_SPROM_SIZE;
730 mutex_init(&bus->sprom_mutex);
731 err = device_create_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
732 if (err)
733 goto error;
734
735 return 0;
736 error:
737 ssb_printk(KERN_ERR PFX "Failed to initialize PCMCIA host device\n");
738 return err;
739 }
Linux kernel - Deliverables
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