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
|
/* $OpenBSD: acpiec.c,v 1.10 2006/12/12 17:59:09 mk Exp $ */
/*
* Copyright (c) 2006 Can Erkin Acar <canacar@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#include <sys/sensors.h>
int acpiec_match(struct device *, void *, void *);
void acpiec_attach(struct device *, struct device *, void *);
u_int8_t acpiec_status(struct acpiec_softc *);
u_int8_t acpiec_read_data(struct acpiec_softc *);
void acpiec_write_cmd(struct acpiec_softc *, u_int8_t);
void acpiec_write_data(struct acpiec_softc *, u_int8_t);
void acpiec_burst_enable(struct acpiec_softc *sc);
u_int8_t acpiec_read_1(struct acpiec_softc *, u_int8_t);
void acpiec_write_1(struct acpiec_softc *, u_int8_t, u_int8_t);
void acpiec_read(struct acpiec_softc *, u_int8_t, int, u_int8_t *);
void acpiec_write(struct acpiec_softc *, u_int8_t, int, u_int8_t *);
int acpiec_getcrs(struct acpiec_softc *, struct acpi_attach_args *);
int acpiec_getregister(const u_int8_t *, int, int *, bus_size_t *);
void acpiec_wait(struct acpiec_softc *, u_int8_t, u_int8_t);
void acpiec_wait_nosleep(struct acpiec_softc *, u_int8_t, u_int8_t);
void acpiec_sci_event(struct acpiec_softc *);
void acpiec_get_events(struct acpiec_softc *);
int acpiec_gpehandler(struct acpi_softc *, int, void *);
struct aml_node *aml_find_name(struct acpi_softc *, struct aml_node *,
const char *);
/* EC Status bits */
#define EC_STAT_SMI_EVT 0x40 /* SMI event pending */
#define EC_STAT_SCI_EVT 0x20 /* SCI event pending */
#define EC_STAT_BURST 0x10 /* Controller in burst mode */
#define EC_STAT_CMD 0x08 /* data is command */
#define EC_STAT_IBF 0x02 /* input buffer full */
#define EC_STAT_OBF 0x01 /* output buffer full */
/* EC Commands */
#define EC_CMD_RD 0x80 /* Read */
#define EC_CMD_WR 0x81 /* Write */
#define EC_CMD_BE 0x82 /* Burst Enable */
#define EC_CMD_BD 0x83 /* Burst Disable */
#define EC_CMD_QR 0x84 /* Query */
#define ACPIEC_MAX_EVENTS 256
struct acpiec_event {
struct aml_node *event;
};
struct acpiec_softc {
struct device sc_dev;
/* command/status register */
bus_space_tag_t sc_cmd_bt;
bus_space_handle_t sc_cmd_bh;
/* data register */
bus_space_tag_t sc_data_bt;
bus_space_handle_t sc_data_bh;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
u_int32_t sc_gpe;
struct acpiec_event sc_events[ACPIEC_MAX_EVENTS];
int sc_locked;
int sc_handling_events;
};
int acpiec_reg(struct acpiec_softc *);
struct cfattach acpiec_ca = {
sizeof(struct acpiec_softc), acpiec_match, acpiec_attach
};
struct cfdriver acpiec_cd = {
NULL, "acpiec", DV_DULL
};
int
acpiec_intr(struct acpiec_softc *sc)
{
u_int8_t stat;
stat = acpiec_status(sc);
dnprintf(40, "%s: EC interrupt, stat: %b\n", DEVNAME(sc), (int)stat,
"\20\x8IGN\x7SMI\x6SCI\05BURST\04CMD\03IGN\02IBF\01OBF");
if (stat & (EC_STAT_IBF | EC_STAT_OBF | EC_STAT_BURST ))
wakeup(sc);
if ((stat & EC_STAT_SCI_EVT) != 0 && sc->sc_locked == 0)
acpiec_sci_event(sc);
return (0);
}
void
acpiec_wait(struct acpiec_softc *sc, u_int8_t mask, u_int8_t val)
{
u_int8_t stat;
dnprintf(40, "%s: EC wait for: %b == %02x\n", DEVNAME(sc), (int)mask,
"\20\x8IGN\x7SMI\x6SCI\05BURST\04CMD\03IGN\02IBF\01OBF", (int)val);
for (;;) {
if (((stat = acpiec_status(sc)) & mask) == val)
break;
tsleep(sc, PWAIT, "acpiec", 10);
}
dnprintf(40, "%s: EC wait, stat: %b\n", DEVNAME(sc), (int) stat,
"\20\x8IGN\x7SMI\x6SCI\05BURST\04CMD\03IGN\02IBF\01OBF");
}
void
acpiec_wait_nosleep(struct acpiec_softc *sc, u_int8_t mask, u_int8_t val)
{
u_int8_t stat;
dnprintf(40, "%s: EC wait_ns for: %b == %02x\n", DEVNAME(sc), (int)mask,
"\20\x8IGN\x7SMI\x6SCI\05BURST\04CMD\03IGN\02IBF\01OBF", (int)val);
for (;;) {
if (((stat = acpiec_status(sc)) & mask) == val)
break;
delay(1);
}
dnprintf(40, "%s: EC wait_ns, stat: %b\n", DEVNAME(sc), (int)stat,
"\20\x8IGN\x7SMI\x6SCI\05BURST\04CMD\03IGN\02IBF\01OBF");
}
u_int8_t
acpiec_status(struct acpiec_softc *sc)
{
return bus_space_read_1(sc->sc_cmd_bt, sc->sc_cmd_bh, 0);
}
void
acpiec_write_data(struct acpiec_softc *sc, u_int8_t val)
{
acpiec_wait(sc, EC_STAT_IBF, 0);
dnprintf(40, "acpiec: write_data -- %d\n", (int) val);
bus_space_write_1(sc->sc_data_bt, sc->sc_data_bh, 0, val);
}
void
acpiec_write_cmd(struct acpiec_softc *sc, u_int8_t val)
{
acpiec_wait(sc, EC_STAT_IBF, 0);
dnprintf(40, "acpiec: write_cmd -- %d\n", (int) val);
bus_space_write_1(sc->sc_cmd_bt, sc->sc_cmd_bh, 0, val);
}
u_int8_t
acpiec_read_data(struct acpiec_softc *sc)
{
u_int8_t val;
acpiec_wait(sc, EC_STAT_OBF, EC_STAT_OBF);
dnprintf(40, "acpiec: read_data\n", (int) val);
val = bus_space_read_1(sc->sc_data_bt, sc->sc_data_bh, 0);
return val;
}
void
acpiec_sci_event(struct acpiec_softc *sc)
{
u_int8_t evt;
acpiec_wait_nosleep(sc, EC_STAT_IBF, 0);
bus_space_write_1(sc->sc_cmd_bt, sc->sc_cmd_bh, 0, EC_CMD_QR);
acpiec_wait_nosleep(sc, EC_STAT_OBF, EC_STAT_OBF);
evt = bus_space_read_1(sc->sc_data_bt, sc->sc_data_bh, 0);
dnprintf(10, "%s: sci_event: 0x%02x\n", DEVNAME(sc), (int) evt);
/* FIXME this call is recursive, this works around that */
if (sc->sc_handling_events == 0) {
sc->sc_handling_events = 1;
aml_evalnode(sc->sc_acpi, sc->sc_events[evt].event, 0, NULL,
NULL);
sc->sc_handling_events = 0;
}
}
u_int8_t
acpiec_read_1(struct acpiec_softc *sc, u_int8_t addr)
{
u_int8_t val;
if ((acpiec_status(sc) & EC_STAT_SCI_EVT) == EC_STAT_SCI_EVT)
acpiec_sci_event(sc);
acpiec_write_cmd(sc, EC_CMD_RD);
acpiec_write_data(sc, addr);
val = acpiec_read_data(sc);
return val;
}
void
acpiec_write_1(struct acpiec_softc *sc, u_int8_t addr, u_int8_t data)
{
if ((acpiec_status(sc) & EC_STAT_SCI_EVT) == EC_STAT_SCI_EVT)
acpiec_sci_event(sc);
acpiec_write_cmd(sc, EC_CMD_WR);
acpiec_write_data(sc, addr);
acpiec_write_data(sc, data);
}
void
acpiec_burst_enable(struct acpiec_softc *sc)
{
acpiec_write_cmd(sc, EC_CMD_BE);
acpiec_read_data(sc);
}
void
acpiec_read(struct acpiec_softc *sc, u_int8_t addr, int len, u_int8_t *buffer)
{
int reg;
/*
* this works because everything runs in the acpi thread context.
* at some point add a lock to deal with concurrency so that a
* transaction does not get interrupted.
*/
sc->sc_locked = 1;
acpiec_burst_enable(sc);
dnprintf(20, "%s: read %d, %d\n", DEVNAME(sc), (int) addr, len);
for (reg = 0; reg < len; reg++)
buffer[reg] = acpiec_read_1(sc, addr + reg);
sc->sc_locked = 0;
}
void
acpiec_write(struct acpiec_softc *sc, u_int8_t addr, int len, u_int8_t *buffer)
{
int reg;
/*
* this works because everything runs in the acpi thread context.
* at some point add a lock to deal with concurrency so that a
* transaction does not get interrupted.
*/
sc->sc_locked = 1;
acpiec_burst_enable(sc);
dnprintf(20, "%s: write %d, %d\n", DEVNAME(sc), (int) addr, len);
for (reg = 0; reg < len; reg++)
acpiec_write_1(sc, addr + reg, buffer[reg]);
sc->sc_locked = 0;
}
int
acpiec_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
/* sanity */
if (aa->aaa_name == NULL ||
strcmp(aa->aaa_name, cf->cf_driver->cd_name) != 0 ||
aa->aaa_table != NULL)
return (0);
return (1);
}
void
acpiec_attach(struct device *parent, struct device *self, void *aux)
{
struct acpiec_softc *sc = (struct acpiec_softc *)self;
struct acpi_attach_args *aa = aux;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node->child;
sc->sc_locked = 0;
if (sc->sc_acpi->sc_ec != NULL) {
printf(": Only single EC is supported!\n");
return;
}
if (acpiec_getcrs(sc, aa)) {
printf(": Failed to read resource settings\n");
return;
}
if (acpiec_reg(sc)) {
printf(": Failed to register address space\n");
return;
}
acpiec_get_events(sc);
sc->sc_acpi->sc_ec = sc;
dnprintf(10, "%s: GPE: %d\n", DEVNAME(sc), sc->sc_gpe);
acpi_set_gpehandler(sc->sc_acpi, sc->sc_gpe, acpiec_gpehandler, sc, "acpiec");
printf(": %s\n", sc->sc_devnode->parent->name);
}
void
acpiec_get_events(struct acpiec_softc *sc)
{
int idx;
char name[16];
memset(sc->sc_events, 0, sizeof(sc->sc_events));
for (idx = 0; idx < ACPIEC_MAX_EVENTS; idx++) {
snprintf(name, sizeof(name), "_Q%02X", idx);
sc->sc_events[idx].event = aml_searchname(sc->sc_devnode, name);
if (sc->sc_events[idx].event != NULL)
dnprintf(10, "%s: Found event %s\n", DEVNAME(sc), name);
}
}
int
acpiec_gpehandler(struct acpi_softc *acpi_sc, int gpe, void *arg)
{
struct acpiec_softc *sc = arg;
uint8_t mask;
dnprintf(10, "ACPIEC: got gpe\n");
acpiec_intr(sc);
/* Reset GPE event */
mask = (1L << (gpe & 7));
acpi_write_pmreg(acpi_sc, ACPIREG_GPE_STS, gpe>>3, mask);
acpi_write_pmreg(acpi_sc, ACPIREG_GPE_EN, gpe>>3, mask);
return (0);
}
/* parse the resource buffer to get a 'register' value */
int
acpiec_getregister(const u_int8_t *buf, int size, int *type, bus_size_t *addr)
{
int len, hlen;
#define RES_TYPE_MASK 0x80
#define RES_LENGTH_MASK 0x07
#define RES_TYPE_IOPORT 0x47
#define RES_TYPE_ENDTAG 0x79
if (size <= 0)
return (0);
if (*buf & RES_TYPE_MASK) {
/* large resource */
if (size < 3)
return (1);
len = (int) buf[1] + 256 * (int) buf[2];
hlen = 3;
} else {
/* small resource */
len = buf[0] & RES_LENGTH_MASK;
hlen = 1;
}
/* XXX todo: decode other types */
if (*buf != RES_TYPE_IOPORT)
return (0);
if (size < hlen + len)
return (0);
/* XXX validate? */
*type = GAS_SYSTEM_IOSPACE;
*addr = (int) buf[2] + 256 * (int) buf[3];
return (hlen + len);
}
int
acpiec_getcrs(struct acpiec_softc *sc, struct acpi_attach_args *aa)
{
struct aml_value res;
bus_size_t ec_sc, ec_data;
int type1, type2;
char *buf;
int size, ret;
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_GPE", 0, NULL, &res)) {
dnprintf(10, "%s: no _GPE\n", DEVNAME(sc));
return (1);
}
sc->sc_gpe = aml_val2int(&res);
aml_freevalue(&res);
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_CRS", 0, NULL, &res)) {
dnprintf(10, "%s: no _CRS\n", DEVNAME(sc));
return (1);
}
/* Parse CRS to get control and data registers */
if (res.type != AML_OBJTYPE_BUFFER) {
dnprintf(10, "%s: unknown _CRS type %d\n",
DEVNAME(sc), res.type);
aml_freevalue(&res);
return (1);
}
size = res.length;
buf = res.v_buffer;
ret = acpiec_getregister(buf, size, &type1, &ec_data);
if (ret <= 0) {
dnprintf(10, "%s: failed to read DATA from _CRS\n",
DEVNAME(sc));
aml_freevalue(&res);
return (1);
}
buf += ret;
size -= ret;
ret = acpiec_getregister(buf, size, &type2, &ec_sc);
if (ret <= 0) {
dnprintf(10, "%s: failed to read S/C from _CRS\n",
DEVNAME(sc));
aml_freevalue(&res);
return (1);
}
buf += ret;
size -= ret;
if (size != 2 || *buf != RES_TYPE_ENDTAG) {
dnprintf(10, "%s: no _CRS end tag\n", DEVNAME(sc));
aml_freevalue(&res);
return (1);
}
aml_freevalue(&res);
/* XXX: todo - validate _CRS checksum? */
dnprintf(10, "%s: Data: 0x%x, S/C: 0x%x\n",
DEVNAME(sc), ec_data, ec_sc);
if (type1 == GAS_SYSTEM_IOSPACE)
sc->sc_cmd_bt = aa->aaa_iot;
else
sc->sc_cmd_bt = aa->aaa_memt;
if (bus_space_map(sc->sc_cmd_bt, ec_sc, 1, 0, &sc->sc_cmd_bh)) {
dnprintf(10, "%s: failed to map S/C reg.\n", DEVNAME(sc));
return (1);
}
if (type2 == GAS_SYSTEM_IOSPACE)
sc->sc_data_bt = aa->aaa_iot;
else
sc->sc_data_bt = aa->aaa_memt;
if (bus_space_map(sc->sc_data_bt, ec_data, 1, 0, &sc->sc_data_bh)) {
dnprintf(10, "%s: failed to map DATA reg.\n", DEVNAME(sc));
bus_space_unmap(sc->sc_cmd_bt, sc->sc_cmd_bh, 1);
return (1);
}
return (0);
}
int
acpiec_reg(struct acpiec_softc *sc)
{
struct aml_value arg[2];
struct aml_node *root;
memset(&arg, 0, sizeof(arg));
#define REG_TYPE_EC 3
arg[0].type = AML_OBJTYPE_INTEGER;
arg[0].v_integer = REG_TYPE_EC;
arg[1].type = AML_OBJTYPE_INTEGER;
arg[1].v_integer = 1;
root = aml_searchname(sc->sc_devnode, "_REG");
if (root == NULL) {
dnprintf(10, "%s: no _REG method\n", DEVNAME(sc));
return (1);
}
if (aml_evalnode(sc->sc_acpi, root, 2, arg, NULL) != 0) {
dnprintf(10, "%s: evaluating method _REG failed.\n", DEVNAME(sc));
return (1);
}
return (0);
}
|