1 /*
2 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
3 * Not a Contribution.
4 * Copyright 2012 The Android Open Source Project
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 /******************************************************************************
20 *
21 * Filename: userial_vendor.c
22 *
23 * Description: Contains vendor-specific userial functions
24 *
25 ******************************************************************************/
26
27 #define LOG_TAG "bt_vendor"
28
29 #include <utils/Log.h>
30 #include <termios.h>
31 #include <fcntl.h>
32 #include <errno.h>
33 #include <stdio.h>
34 #include <string.h>
35 #include "bt_vendor_qcom.h"
36 #include "hci_uart.h"
37
38
39 /******************************************************************************
40 ** Constants & Macros
41 ******************************************************************************/
42
43 #ifndef VNDUSERIAL_DBG
44 #define VNDUSERIAL_DBG TRUE
45 #endif
46
47 #if (VNDUSERIAL_DBG == TRUE)
48 #define VNDUSERIALDBG(param, ...) {ALOGI(param, ## __VA_ARGS__);}
49 #else
50 #define VNDUSERIALDBG(param, ...) {}
51 #endif
52
53 /******************************************************************************
54 ** Global variables
55 ******************************************************************************/
56 vnd_userial_cb_t vnd_userial;
57
58 /*****************************************************************************
59 ** Functions
60 *****************************************************************************/
61
62 /*******************************************************************************
63 **
64 ** Function userial_to_tcio_baud
65 **
66 ** Description helper function converts USERIAL baud rates into TCIO
67 ** conforming baud rates
68 **
69 ** Returns TRUE/FALSE
70 **
71 *******************************************************************************/
userial_to_tcio_baud(uint8_t cfg_baud,uint32_t * baud)72 uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
73 {
74 if (cfg_baud == USERIAL_BAUD_115200)
75 *baud = B115200;
76 else if (cfg_baud == USERIAL_BAUD_4M)
77 *baud = B4000000;
78 else if (cfg_baud == USERIAL_BAUD_3M)
79 *baud = B3000000;
80 else if (cfg_baud == USERIAL_BAUD_2M)
81 *baud = B2000000;
82 else if (cfg_baud == USERIAL_BAUD_1M)
83 *baud = B1000000;
84 else if (cfg_baud == USERIAL_BAUD_921600)
85 *baud = B921600;
86 else if (cfg_baud == USERIAL_BAUD_460800)
87 *baud = B460800;
88 else if (cfg_baud == USERIAL_BAUD_230400)
89 *baud = B230400;
90 else if (cfg_baud == USERIAL_BAUD_57600)
91 *baud = B57600;
92 else if (cfg_baud == USERIAL_BAUD_19200)
93 *baud = B19200;
94 else if (cfg_baud == USERIAL_BAUD_9600)
95 *baud = B9600;
96 else if (cfg_baud == USERIAL_BAUD_1200)
97 *baud = B1200;
98 else if (cfg_baud == USERIAL_BAUD_600)
99 *baud = B600;
100 else
101 {
102 ALOGE( "userial vendor open: unsupported baud idx %i", cfg_baud);
103 *baud = B115200;
104 return FALSE;
105 }
106
107 return TRUE;
108 }
109
110 /*******************************************************************************
111 **
112 ** Function userial_to_baud_tcio
113 **
114 ** Description helper function converts TCIO baud rate into integer
115 **
116 ** Returns uint32_t
117 **
118 *******************************************************************************/
userial_tcio_baud_to_int(uint32_t baud)119 int userial_tcio_baud_to_int(uint32_t baud)
120 {
121 int baud_rate =0;
122
123 switch (baud)
124 {
125 case B600:
126 baud_rate = 600;
127 break;
128 case B1200:
129 baud_rate = 1200;
130 break;
131 case B9600:
132 baud_rate = 9600;
133 break;
134 case B19200:
135 baud_rate = 19200;
136 break;
137 case B57600:
138 baud_rate = 57600;
139 break;
140 case B115200:
141 baud_rate = 115200;
142 break;
143 case B230400:
144 baud_rate = 230400;
145 break;
146 case B460800:
147 baud_rate = 460800;
148 break;
149 case B921600:
150 baud_rate = 921600;
151 break;
152 case B1000000:
153 baud_rate = 1000000;
154 break;
155 case B2000000:
156 baud_rate = 2000000;
157 break;
158 case B3000000:
159 baud_rate = 3000000;
160 break;
161 case B4000000:
162 baud_rate = 4000000;
163 break;
164 default:
165 ALOGE( "%s: unsupported baud %d", __FUNCTION__, baud);
166 break;
167 }
168
169 ALOGI( "%s: Current Baudrate = %d bps", __FUNCTION__, baud_rate);
170 return baud_rate;
171 }
172
173
174 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
175 /*******************************************************************************
176 **
177 ** Function userial_ioctl_init_bt_wake
178 **
179 ** Description helper function to set the open state of the bt_wake if ioctl
180 ** is used. it should not hurt in the rfkill case but it might
181 ** be better to compile it out.
182 **
183 ** Returns none
184 **
185 *******************************************************************************/
userial_ioctl_init_bt_wake(int fd)186 void userial_ioctl_init_bt_wake(int fd)
187 {
188 uint32_t bt_wake_state;
189
190 /* assert BT_WAKE through ioctl */
191 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
192 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
193 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
194 bt_wake_state);
195 }
196 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
197
198
199 /*****************************************************************************
200 ** Userial Vendor API Functions
201 *****************************************************************************/
202
203 /*******************************************************************************
204 **
205 ** Function userial_vendor_init
206 **
207 ** Description Initialize userial vendor-specific control block
208 **
209 ** Returns None
210 **
211 *******************************************************************************/
userial_vendor_init(void)212 void userial_vendor_init(void)
213 {
214 vnd_userial.fd = -1;
215 snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", BT_HS_UART_DEVICE);
216 }
217
218 /*******************************************************************************
219 **
220 ** Function userial_vendor_open
221 **
222 ** Description Open the serial port with the given configuration
223 **
224 ** Returns device fd
225 **
226 *******************************************************************************/
userial_vendor_open(tUSERIAL_CFG * p_cfg)227 int userial_vendor_open(tUSERIAL_CFG *p_cfg)
228 {
229 uint32_t baud;
230 uint8_t data_bits;
231 uint16_t parity;
232 uint8_t stop_bits;
233
234 vnd_userial.fd = -1;
235
236 if (!userial_to_tcio_baud(p_cfg->baud, &baud))
237 {
238 return -1;
239 }
240
241 if(p_cfg->fmt & USERIAL_DATABITS_8)
242 data_bits = CS8;
243 else if(p_cfg->fmt & USERIAL_DATABITS_7)
244 data_bits = CS7;
245 else if(p_cfg->fmt & USERIAL_DATABITS_6)
246 data_bits = CS6;
247 else if(p_cfg->fmt & USERIAL_DATABITS_5)
248 data_bits = CS5;
249 else
250 {
251 ALOGE("userial vendor open: unsupported data bits");
252 return -1;
253 }
254
255 if(p_cfg->fmt & USERIAL_PARITY_NONE)
256 parity = 0;
257 else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
258 parity = PARENB;
259 else if(p_cfg->fmt & USERIAL_PARITY_ODD)
260 parity = (PARENB | PARODD);
261 else
262 {
263 ALOGE("userial vendor open: unsupported parity bit mode");
264 return -1;
265 }
266
267 if(p_cfg->fmt & USERIAL_STOPBITS_1)
268 stop_bits = 0;
269 else if(p_cfg->fmt & USERIAL_STOPBITS_2)
270 stop_bits = CSTOPB;
271 else
272 {
273 ALOGE("userial vendor open: unsupported stop bits");
274 return -1;
275 }
276
277 ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
278
279 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR|O_NOCTTY)) == -1)
280 {
281 ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
282 return -1;
283 }
284
285 tcflush(vnd_userial.fd, TCIOFLUSH);
286
287 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
288 cfmakeraw(&vnd_userial.termios);
289
290 /* Set UART Control Modes */
291 vnd_userial.termios.c_cflag |= CLOCAL;
292 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
293
294 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
295
296 /* set input/output baudrate */
297 cfsetospeed(&vnd_userial.termios, baud);
298 cfsetispeed(&vnd_userial.termios, baud);
299 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
300
301 tcflush(vnd_userial.fd, TCIOFLUSH);
302
303 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
304 userial_ioctl_init_bt_wake(vnd_userial.fd);
305 #endif
306
307 ALOGI("device fd = %d open", vnd_userial.fd);
308
309 return vnd_userial.fd;
310 }
311
312 /*******************************************************************************
313 **
314 ** Function userial_vendor_close
315 **
316 ** Description Conduct vendor-specific close work
317 **
318 ** Returns None
319 **
320 *******************************************************************************/
userial_vendor_close(void)321 void userial_vendor_close(void)
322 {
323 int result;
324
325 if (vnd_userial.fd == -1)
326 return;
327
328 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
329 /* de-assert bt_wake BEFORE closing port */
330 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
331 #endif
332
333 ALOGI("device fd = %d close", vnd_userial.fd);
334
335 if ((result = close(vnd_userial.fd)) < 0)
336 ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
337
338 vnd_userial.fd = -1;
339 }
340
341 /*******************************************************************************
342 **
343 ** Function userial_vendor_set_baud
344 **
345 ** Description Set new baud rate
346 **
347 ** Returns None
348 **
349 *******************************************************************************/
userial_vendor_set_baud(uint8_t userial_baud)350 void userial_vendor_set_baud(uint8_t userial_baud)
351 {
352 uint32_t tcio_baud;
353
354 VNDUSERIALDBG("## userial_vendor_set_baud: %d", userial_baud);
355
356 userial_to_tcio_baud(userial_baud, &tcio_baud);
357
358 cfsetospeed(&vnd_userial.termios, tcio_baud);
359 cfsetispeed(&vnd_userial.termios, tcio_baud);
360 tcsetattr(vnd_userial.fd, TCSADRAIN, &vnd_userial.termios); /* don't change speed until last write done */
361 }
362
363 /*******************************************************************************
364 **
365 ** Function userial_vendor_get_baud
366 **
367 ** Description Get current baud rate
368 **
369 ** Returns int
370 **
371 *******************************************************************************/
userial_vendor_get_baud(void)372 int userial_vendor_get_baud(void)
373 {
374 if (vnd_userial.fd == -1)
375 {
376 ALOGE( "%s: uart port(%s) has not been opened", __FUNCTION__, BT_HS_UART_DEVICE );
377 return -1;
378 }
379
380 return userial_tcio_baud_to_int(cfgetispeed(&vnd_userial.termios));
381 }
382
383 /*******************************************************************************
384 **
385 ** Function userial_vendor_ioctl
386 **
387 ** Description ioctl inteface
388 **
389 ** Returns None
390 **
391 *******************************************************************************/
userial_vendor_ioctl(userial_vendor_ioctl_op_t op,int * p_data)392 int userial_vendor_ioctl(userial_vendor_ioctl_op_t op, int *p_data)
393 {
394 int err;
395
396 switch(op)
397 {
398 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
399 case USERIAL_OP_ASSERT_BT_WAKE:
400 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
401 err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
402 break;
403
404 case USERIAL_OP_DEASSERT_BT_WAKE:
405 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
406 err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
407 break;
408
409 case USERIAL_OP_GET_BT_WAKE_STATE:
410 err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
411 break;
412 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
413 case USERIAL_OP_FLOW_ON:
414 ALOGI("## userial_vendor_ioctl: UART Flow On ");
415 *p_data |=TIOCM_RTS;
416 err = ioctl(vnd_userial.fd, TIOCMSET, p_data);
417 break;
418
419 case USERIAL_OP_FLOW_OFF:
420 ALOGI("## userial_vendor_ioctl: UART Flow Off ");
421 ioctl(vnd_userial.fd, TIOCMGET, p_data);
422 *p_data &= ~TIOCM_RTS;
423 err = ioctl(vnd_userial.fd, TIOCMSET, p_data);
424 break;
425
426 default:
427 break;
428 }
429
430 return err;
431 }
432
433 /*******************************************************************************
434 **
435 ** Function userial_set_port
436 **
437 ** Description Configure UART port name
438 **
439 ** Returns 0 : Success
440 ** Otherwise : Fail
441 **
442 *******************************************************************************/
userial_set_port(char * p_conf_name,char * p_conf_value,int param)443 int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
444 {
445 strlcpy(vnd_userial.port_name, p_conf_value, VND_PORT_NAME_MAXLEN);
446
447 return 0;
448 }
449
450 /*******************************************************************************
451 **
452 ** Function read_hci_event
453 **
454 ** Description Read HCI event during vendor initialization
455 **
456 ** Returns int: size to read
457 **
458 *******************************************************************************/
read_hci_event(int fd,unsigned char * buf,int size)459 int read_hci_event(int fd, unsigned char* buf, int size)
460 {
461 int remain, r;
462 int count = 0;
463
464 if (size <= 0) {
465 ALOGE("Invalid size arguement!");
466 return -1;
467 }
468
469 ALOGI("%s: Wait for Command Compete Event from SOC", __FUNCTION__);
470
471 /* The first byte identifies the packet type. For HCI event packets, it
472 * should be 0x04, so we read until we get to the 0x04. */
473 while (1) {
474 r = read(fd, buf, 1);
475 if (r <= 0)
476 return -1;
477 if (buf[0] == 0x04)
478 break;
479 }
480 count++;
481
482 /* The next two bytes are the event code and parameter total length. */
483 while (count < 3) {
484 r = read(fd, buf + count, 3 - count);
485 if (r <= 0)
486 return -1;
487 count += r;
488 }
489
490 /* Now we read the parameters. */
491 if (buf[2] < (size - 3))
492 remain = buf[2];
493 else
494 remain = size - 3;
495
496 while ((count - 3) < remain) {
497 r = read(fd, buf + count, remain - (count - 3));
498 if (r <= 0)
499 return -1;
500 count += r;
501 }
502 return count;
503 }
504
userial_clock_operation(int fd,int cmd)505 int userial_clock_operation(int fd, int cmd)
506 {
507 int ret = 0;
508
509 switch (cmd)
510 {
511 case USERIAL_OP_CLK_ON:
512 case USERIAL_OP_CLK_OFF:
513 ioctl(fd, cmd);
514 break;
515 case USERIAL_OP_CLK_STATE:
516 ret = ioctl(fd, cmd);
517 break;
518 }
519
520 return ret;
521 }
522