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1/******************************************************************************
2 *
3 * Copyright (C) 2009-2012 Broadcom Corporation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19/******************************************************************************
20 *
21 * Filename: upio.c
22 *
23 * Description: Contains I/O functions, like
24 * rfkill control
25 * BT_WAKE/HOST_WAKE control
26 *
27 ******************************************************************************/
28
29#define LOG_TAG "bt_upio"
30
31#include <utils/Log.h>
32#include <fcntl.h>
33#include <errno.h>
34#include <cutils/properties.h>
35#include "bt_vendor_brcm.h"
36#include "upio.h"
37#include "userial_vendor.h"
38
39/******************************************************************************
40** Constants & Macros
41******************************************************************************/
42
43#ifndef UPIO_DBG
44#define UPIO_DBG FALSE
45#endif
46
47#if (UPIO_DBG == TRUE)
48#define UPIODBG(param, ...) {ALOGD(param, ## __VA_ARGS__);}
49#else
50#define UPIODBG(param, ...) {}
51#endif
52
53/******************************************************************************
54** Local type definitions
55******************************************************************************/
56
57#if (BT_WAKE_VIA_PROC == TRUE)
58
59/* proc fs node for enable/disable lpm mode */
60#ifndef VENDOR_LPM_PROC_NODE
61#define VENDOR_LPM_PROC_NODE "/proc/bluetooth/sleep/lpm"
62#endif
63
64/* proc fs node for notifying write request */
65#ifndef VENDOR_BTWRITE_PROC_NODE
66#define VENDOR_BTWRITE_PROC_NODE "/proc/bluetooth/sleep/btwrite"
67#endif
68
69/*
70 * Maximum btwrite assertion holding time without consecutive btwrite kicking.
71 * This value is correlative(shorter) to the in-activity timeout period set in
72 * the bluesleep LPM code. The current value used in bluesleep is 10sec.
73 */
74#ifndef PROC_BTWRITE_TIMER_TIMEOUT_MS
75#define PROC_BTWRITE_TIMER_TIMEOUT_MS 8000
76#endif
77
78/* lpm proc control block */
79typedef struct
80{
81 uint8_t btwrite_active;
82 uint8_t timer_created;
83 timer_t timer_id;
84 uint32_t timeout_ms;
85} vnd_lpm_proc_cb_t;
86
87static vnd_lpm_proc_cb_t lpm_proc_cb;
88#endif
89
90/******************************************************************************
91** Static variables
92******************************************************************************/
93
94static uint8_t upio_state[UPIO_MAX_COUNT];
95static int rfkill_id = -1;
96static int bt_emul_enable = 0;
97static char *rfkill_state_path = NULL;
98
99/******************************************************************************
100** Static functions
101******************************************************************************/
102
103/* for friendly debugging outpout string */
104static char *lpm_mode[] = {
105 "UNKNOWN",
106 "disabled",
107 "enabled"
108};
109
110static char *lpm_state[] = {
111 "UNKNOWN",
112 "de-asserted",
113 "asserted"
114};
115
116/*****************************************************************************
117** Bluetooth On/Off Static Functions
118*****************************************************************************/
119static int is_emulator_context(void)
120{
121 char value[PROPERTY_VALUE_MAX];
122
123 property_get("ro.kernel.qemu", value, "0");
124 UPIODBG("is_emulator_context : %s", value);
125 if (strcmp(value, "1") == 0) {
126 return 1;
127 }
128 return 0;
129}
130
131static int is_rfkill_disabled(void)
132{
133 char value[PROPERTY_VALUE_MAX];
134
135 property_get("ro.rfkilldisabled", value, "0");
136 UPIODBG("is_rfkill_disabled ? [%s]", value);
137
138 if (strcmp(value, "1") == 0) {
139 return UPIO_BT_POWER_ON;
140 }
141
142 return UPIO_BT_POWER_OFF;
143}
144
145static int init_rfkill()
146{
147 char path[64];
148 char buf[16];
149 int fd, sz, id;
150
151 if (is_rfkill_disabled())
152 return -1;
153
154 for (id = 0; ; id++)
155 {
156 snprintf(path, sizeof(path), "/sys/class/rfkill/rfkill%d/type", id);
157 fd = open(path, O_RDONLY);
158 if (fd < 0)
159 {
160 ALOGE("init_rfkill : open(%s) failed: %s (%d)\n", \
161 path, strerror(errno), errno);
162 return -1;
163 }
164
165 sz = read(fd, &buf, sizeof(buf));
166 close(fd);
167
168 if (sz >= 9 && memcmp(buf, "bluetooth", 9) == 0)
169 {
170 rfkill_id = id;
171 break;
172 }
173 }
174
175 asprintf(&rfkill_state_path, "/sys/class/rfkill/rfkill%d/state", rfkill_id);
176 return 0;
177}
178
179/*****************************************************************************
180** LPM Static Functions
181*****************************************************************************/
182
183#if (BT_WAKE_VIA_PROC == TRUE)
184/*******************************************************************************
185**
186** Function proc_btwrite_timeout
187**
188** Description Timeout thread of proc/.../btwrite assertion holding timer
189**
190** Returns None
191**
192*******************************************************************************/
193static void proc_btwrite_timeout(union sigval arg)
194{
195 UPIODBG("..%s..", __FUNCTION__);
196 lpm_proc_cb.btwrite_active = FALSE;
197}
198#endif
199
200/*****************************************************************************
201** UPIO Interface Functions
202*****************************************************************************/
203
204/*******************************************************************************
205**
206** Function upio_init
207**
208** Description Initialization
209**
210** Returns None
211**
212*******************************************************************************/
213void upio_init(void)
214{
215 memset(upio_state, UPIO_UNKNOWN, UPIO_MAX_COUNT);
216#if (BT_WAKE_VIA_PROC == TRUE)
217 memset(&lpm_proc_cb, 0, sizeof(vnd_lpm_proc_cb_t));
218#endif
219}
220
221/*******************************************************************************
222**
223** Function upio_cleanup
224**
225** Description Clean up
226**
227** Returns None
228**
229*******************************************************************************/
230void upio_cleanup(void)
231{
232#if (BT_WAKE_VIA_PROC == TRUE)
233 if (lpm_proc_cb.timer_created == TRUE)
234 timer_delete(lpm_proc_cb.timer_id);
235
236 lpm_proc_cb.timer_created = FALSE;
237#endif
238}
239
240/*******************************************************************************
241**
242** Function upio_set_bluetooth_power
243**
244** Description Interact with low layer driver to set Bluetooth power
245** on/off.
246**
247** Returns 0 : SUCCESS or Not-Applicable
248** <0 : ERROR
249**
250*******************************************************************************/
251int upio_set_bluetooth_power(int on)
252{
253 int sz;
254 int fd = -1;
255 int ret = -1;
256 char buffer = '0';
257
258 switch(on)
259 {
260 case UPIO_BT_POWER_OFF:
261 buffer = '0';
262 break;
263
264 case UPIO_BT_POWER_ON:
265 buffer = '1';
266 break;
267 }
268
269 if (is_emulator_context())
270 {
271 /* if new value is same as current, return -1 */
272 if (bt_emul_enable == on)
273 return ret;
274
275 UPIODBG("set_bluetooth_power [emul] %d", on);
276
277 bt_emul_enable = on;
278 return 0;
279 }
280
281 /* check if we have rfkill interface */
282 if (is_rfkill_disabled())
283 return 0;
284
285 if (rfkill_id == -1)
286 {
287 if (init_rfkill())
288 return ret;
289 }
290
291 fd = open(rfkill_state_path, O_WRONLY);
292
293 if (fd < 0)
294 {
295 ALOGE("set_bluetooth_power : open(%s) for write failed: %s (%d)",
296 rfkill_state_path, strerror(errno), errno);
297 return ret;
298 }
299
300 sz = write(fd, &buffer, 1);
301
302 if (sz < 0) {
303 ALOGE("set_bluetooth_power : write(%s) failed: %s (%d)",
304 rfkill_state_path, strerror(errno),errno);
305 }
306 else
307 ret = 0;
308
309 if (fd >= 0)
310 close(fd);
311
312 return ret;
313}
314
315
316/*******************************************************************************
317**
318** Function upio_set
319**
320** Description Set i/o based on polarity
321**
322** Returns None
323**
324*******************************************************************************/
325void upio_set(uint8_t pio, uint8_t action, uint8_t polarity)
326{
327 int rc;
328#if (BT_WAKE_VIA_PROC == TRUE)
329 int fd = -1;
330 char buffer;
331#endif
332
333 switch (pio)
334 {
335 case UPIO_LPM_MODE:
336 if (upio_state[UPIO_LPM_MODE] == action)
337 {
338 UPIODBG("LPM is %s already", lpm_mode[action]);
339 return;
340 }
341
342 upio_state[UPIO_LPM_MODE] = action;
343
344#if (BT_WAKE_VIA_PROC == TRUE)
345 fd = open(VENDOR_LPM_PROC_NODE, O_WRONLY);
346
347 if (fd < 0)
348 {
349 ALOGE("upio_set : open(%s) for write failed: %s (%d)",
350 VENDOR_LPM_PROC_NODE, strerror(errno), errno);
351 return;
352 }
353
354 if (action == UPIO_ASSERT)
355 {
356 UPIODBG("LPM asserted");
357 buffer = '1';
358 }
359 else
360 {
361 UPIODBG("LPM deasserted");
362 buffer = '0';
363
364 // delete btwrite assertion holding timer
365 if (lpm_proc_cb.timer_created == TRUE)
366 {
367 timer_delete(lpm_proc_cb.timer_id);
368 lpm_proc_cb.timer_created = FALSE;
369 }
370 }
371
372 if (write(fd, &buffer, 1) < 0)
373 {
374 ALOGE("upio_set : write(%s) failed: %s (%d)",
375 VENDOR_LPM_PROC_NODE, strerror(errno),errno);
376 }
377 else
378 {
379 if (action == UPIO_ASSERT)
380 {
381 // create btwrite assertion holding timer
382 if (lpm_proc_cb.timer_created == FALSE)
383 {
384 int status;
385 struct sigevent se;
386
387 se.sigev_notify = SIGEV_THREAD;
388 se.sigev_value.sival_ptr = &lpm_proc_cb.timer_id;
389 se.sigev_notify_function = proc_btwrite_timeout;
390 se.sigev_notify_attributes = NULL;
391
392 status = timer_create(CLOCK_MONOTONIC, &se,
393 &lpm_proc_cb.timer_id);
394
395 if (status == 0)
396 lpm_proc_cb.timer_created = TRUE;
397 }
398 }
399 }
400
401 if (fd >= 0)
402 close(fd);
403#endif
404 break;
405
406 case UPIO_BT_WAKE:
407
408 if (upio_state[UPIO_BT_WAKE] == action)
409 {
410 UPIODBG("BT_WAKE is %s already", lpm_state[action]);
411
412#if (BT_WAKE_VIA_PROC == TRUE)
413 if (lpm_proc_cb.btwrite_active == TRUE)
414 /*
415 * The proc btwrite node could have not been updated for
416 * certain time already due to heavy downstream path flow.
417 * In this case, we want to explicity touch proc btwrite
418 * node to keep the bt_wake assertion in the LPM kernel
419 * driver. The current kernel bluesleep LPM code starts
420 * a 10sec internal in-activity timeout timer before it
421 * attempts to deassert BT_WAKE line.
422 */
423#endif
424 return;
425 }
426
427 upio_state[UPIO_BT_WAKE] = action;
428
429 /****************************************
430 * !!! TODO !!!
431 *
432 * === Custom Porting Required ===
433 *
434 * Platform dependent user-to-kernel
435 * interface is required to set output
436 * state of physical BT_WAKE pin.
437 ****************************************/
438#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
439 userial_vendor_ioctl( ( (action==UPIO_ASSERT) ? \
440 USERIAL_OP_ASSERT_BT_WAKE : USERIAL_OP_DEASSERT_BT_WAKE),\
441 NULL);
442
443#elif (BT_WAKE_VIA_PROC == TRUE)
444
445 /*
446 * Kick proc btwrite node only at UPIO_ASSERT
447 */
448 if (action == UPIO_DEASSERT)
449 {
450 UPIODBG("btwake deassertion");
451 return;
452 }
453
454 fd = open(VENDOR_BTWRITE_PROC_NODE, O_WRONLY);
455
456 if (fd < 0)
457 {
458 ALOGE("upio_set : open(%s) for write failed: %s (%d)",
459 VENDOR_BTWRITE_PROC_NODE, strerror(errno), errno);
460 return;
461 }
462
463 buffer = '1';
464
465 if (write(fd, &buffer, 1) < 0)
466 {
467 ALOGE("upio_set : write(%s) failed: %s (%d)",
468 VENDOR_BTWRITE_PROC_NODE, strerror(errno),errno);
469 }
470 else
471 {
472 lpm_proc_cb.btwrite_active = TRUE;
473
474 if (lpm_proc_cb.timer_created == TRUE)
475 {
476 struct itimerspec ts;
477
478 ts.it_value.tv_sec = PROC_BTWRITE_TIMER_TIMEOUT_MS/1000;
479 ts.it_value.tv_nsec = 1000*(PROC_BTWRITE_TIMER_TIMEOUT_MS%1000);
480 ts.it_interval.tv_sec = 0;
481 ts.it_interval.tv_nsec = 0;
482
483 timer_settime(lpm_proc_cb.timer_id, 0, &ts, 0);
484 }
485 }
486 //ms_delay(10);
487 UPIODBG("proc btwrite assertion");
488
489 if (fd >= 0)
490 close(fd);
491#endif
492 break;
493
494 case UPIO_HOST_WAKE:
495 UPIODBG("upio_set: UPIO_HOST_WAKE");
496 break;
497 }
498}
499
500
501
generated by cgit at 2024-05-19 06:23:32 (GMT)