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: userial_vendor.c
22 *
23 * Description: Contains vendor-specific userial functions
24 *
25 ******************************************************************************/
26
27 #define LOG_TAG "bt_userial_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 "bt_vendor_brcm.h"
35 #include "userial.h"
36 #include "userial_vendor.h"
37
38 /******************************************************************************
39 ** Constants & Macros
40 ******************************************************************************/
41
42 #ifndef VNDUSERIAL_DBG
43 #define VNDUSERIAL_DBG FALSE
44 #endif
45
46 #if (VNDUSERIAL_DBG == TRUE)
47 #define VNDUSERIALDBG(param, ...) {ALOGD(param, ## __VA_ARGS__);}
48 #else
49 #define VNDUSERIALDBG(param, ...) {}
50 #endif
51
52 #define VND_PORT_NAME_MAXLEN 256
53
54 /******************************************************************************
55 ** Local type definitions
56 ******************************************************************************/
57
58 /* vendor serial control block */
59 typedef struct
60 {
61 int fd; /* fd to Bluetooth device */
62 struct termios termios; /* serial terminal of BT port */
63 char port_name[VND_PORT_NAME_MAXLEN];
64 } vnd_userial_cb_t;
65
66 /******************************************************************************
67 ** Static variables
68 ******************************************************************************/
69
70 static vnd_userial_cb_t vnd_userial;
71
72 /*****************************************************************************
73 ** Helper Functions
74 *****************************************************************************/
75
76 /*******************************************************************************
77 **
78 ** Function userial_to_tcio_baud
79 **
80 ** Description helper function converts USERIAL baud rates into TCIO
81 ** conforming baud rates
82 **
83 ** Returns TRUE/FALSE
84 **
85 *******************************************************************************/
userial_to_tcio_baud(uint8_t cfg_baud,uint32_t * baud)86 uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
87 {
88 if (cfg_baud == USERIAL_BAUD_115200)
89 *baud = B115200;
90 else if (cfg_baud == USERIAL_BAUD_4M)
91 *baud = B4000000;
92 else if (cfg_baud == USERIAL_BAUD_3M)
93 *baud = B3000000;
94 else if (cfg_baud == USERIAL_BAUD_2M)
95 *baud = B2000000;
96 else if (cfg_baud == USERIAL_BAUD_1M)
97 *baud = B1000000;
98 else if (cfg_baud == USERIAL_BAUD_921600)
99 *baud = B921600;
100 else if (cfg_baud == USERIAL_BAUD_460800)
101 *baud = B460800;
102 else if (cfg_baud == USERIAL_BAUD_230400)
103 *baud = B230400;
104 else if (cfg_baud == USERIAL_BAUD_57600)
105 *baud = B57600;
106 else if (cfg_baud == USERIAL_BAUD_19200)
107 *baud = B19200;
108 else if (cfg_baud == USERIAL_BAUD_9600)
109 *baud = B9600;
110 else if (cfg_baud == USERIAL_BAUD_1200)
111 *baud = B1200;
112 else if (cfg_baud == USERIAL_BAUD_600)
113 *baud = B600;
114 else
115 {
116 ALOGE( "userial vendor open: unsupported baud idx %i", cfg_baud);
117 *baud = B115200;
118 return FALSE;
119 }
120
121 return TRUE;
122 }
123
124 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
125 /*******************************************************************************
126 **
127 ** Function userial_ioctl_init_bt_wake
128 **
129 ** Description helper function to set the open state of the bt_wake if ioctl
130 ** is used. it should not hurt in the rfkill case but it might
131 ** be better to compile it out.
132 **
133 ** Returns none
134 **
135 *******************************************************************************/
userial_ioctl_init_bt_wake(int fd)136 void userial_ioctl_init_bt_wake(int fd)
137 {
138 uint32_t bt_wake_state;
139
140 #if (BT_WAKE_USERIAL_LDISC==TRUE)
141 int ldisc = N_BRCM_HCI; /* brcm sleep mode support line discipline */
142
143 /* attempt to load enable discipline driver */
144 if (ioctl(vnd_userial.fd, TIOCSETD, &ldisc) < 0)
145 {
146 VNDUSERIALDBG("USERIAL_Open():fd %d, TIOCSETD failed: error %d for ldisc: %d",
147 fd, errno, ldisc);
148 }
149 #endif
150
151
152
153 /* assert BT_WAKE through ioctl */
154 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
155 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
156 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
157 bt_wake_state);
158 }
159 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
160
161
162 /*****************************************************************************
163 ** Userial Vendor API Functions
164 *****************************************************************************/
165
166 /*******************************************************************************
167 **
168 ** Function userial_vendor_init
169 **
170 ** Description Initialize userial vendor-specific control block
171 **
172 ** Returns None
173 **
174 *******************************************************************************/
userial_vendor_init(void)175 void userial_vendor_init(void)
176 {
177 vnd_userial.fd = -1;
178 snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", \
179 BLUETOOTH_UART_DEVICE_PORT);
180 }
181
182 /*******************************************************************************
183 **
184 ** Function userial_vendor_open
185 **
186 ** Description Open the serial port with the given configuration
187 **
188 ** Returns device fd
189 **
190 *******************************************************************************/
userial_vendor_open(tUSERIAL_CFG * p_cfg)191 int userial_vendor_open(tUSERIAL_CFG *p_cfg)
192 {
193 uint32_t baud;
194 uint8_t data_bits;
195 uint16_t parity;
196 uint8_t stop_bits;
197
198 vnd_userial.fd = -1;
199
200 if (!userial_to_tcio_baud(p_cfg->baud, &baud))
201 {
202 return -1;
203 }
204
205 if(p_cfg->fmt & USERIAL_DATABITS_8)
206 data_bits = CS8;
207 else if(p_cfg->fmt & USERIAL_DATABITS_7)
208 data_bits = CS7;
209 else if(p_cfg->fmt & USERIAL_DATABITS_6)
210 data_bits = CS6;
211 else if(p_cfg->fmt & USERIAL_DATABITS_5)
212 data_bits = CS5;
213 else
214 {
215 ALOGE("userial vendor open: unsupported data bits");
216 return -1;
217 }
218
219 if(p_cfg->fmt & USERIAL_PARITY_NONE)
220 parity = 0;
221 else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
222 parity = PARENB;
223 else if(p_cfg->fmt & USERIAL_PARITY_ODD)
224 parity = (PARENB | PARODD);
225 else
226 {
227 ALOGE("userial vendor open: unsupported parity bit mode");
228 return -1;
229 }
230
231 if(p_cfg->fmt & USERIAL_STOPBITS_1)
232 stop_bits = 0;
233 else if(p_cfg->fmt & USERIAL_STOPBITS_2)
234 stop_bits = CSTOPB;
235 else
236 {
237 ALOGE("userial vendor open: unsupported stop bits");
238 return -1;
239 }
240
241 ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
242
243 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1)
244 {
245 ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
246 return -1;
247 }
248
249 tcflush(vnd_userial.fd, TCIOFLUSH);
250
251 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
252 cfmakeraw(&vnd_userial.termios);
253 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
254 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
255 tcflush(vnd_userial.fd, TCIOFLUSH);
256
257 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
258 tcflush(vnd_userial.fd, TCIOFLUSH);
259 tcflush(vnd_userial.fd, TCIOFLUSH);
260
261 /* set input/output baudrate */
262 cfsetospeed(&vnd_userial.termios, baud);
263 cfsetispeed(&vnd_userial.termios, baud);
264 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
265
266 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
267 userial_ioctl_init_bt_wake(vnd_userial.fd);
268 #endif
269
270 ALOGI("device fd = %d open", vnd_userial.fd);
271
272 return vnd_userial.fd;
273 }
274
275 /*******************************************************************************
276 **
277 ** Function userial_vendor_close
278 **
279 ** Description Conduct vendor-specific close work
280 **
281 ** Returns None
282 **
283 *******************************************************************************/
userial_vendor_close(void)284 void userial_vendor_close(void)
285 {
286 int result;
287
288 if (vnd_userial.fd == -1)
289 return;
290
291 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
292 /* de-assert bt_wake BEFORE closing port */
293 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
294 #endif
295
296 ALOGI("device fd = %d close", vnd_userial.fd);
297 // flush Tx before close to make sure no chars in buffer
298 tcflush(vnd_userial.fd, TCIOFLUSH);
299 if ((result = close(vnd_userial.fd)) < 0)
300 ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
301
302 vnd_userial.fd = -1;
303 }
304
305 /*******************************************************************************
306 **
307 ** Function userial_vendor_set_baud
308 **
309 ** Description Set new baud rate
310 **
311 ** Returns None
312 **
313 *******************************************************************************/
userial_vendor_set_baud(uint8_t userial_baud)314 void userial_vendor_set_baud(uint8_t userial_baud)
315 {
316 uint32_t tcio_baud;
317
318 userial_to_tcio_baud(userial_baud, &tcio_baud);
319
320 cfsetospeed(&vnd_userial.termios, tcio_baud);
321 cfsetispeed(&vnd_userial.termios, tcio_baud);
322 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
323 }
324
325 /*******************************************************************************
326 **
327 ** Function userial_vendor_ioctl
328 **
329 ** Description ioctl inteface
330 **
331 ** Returns None
332 **
333 *******************************************************************************/
userial_vendor_ioctl(userial_vendor_ioctl_op_t op,void * p_data)334 void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
335 {
336 switch(op)
337 {
338 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
339 case USERIAL_OP_ASSERT_BT_WAKE:
340 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
341 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
342 break;
343
344 case USERIAL_OP_DEASSERT_BT_WAKE:
345 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
346 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
347 break;
348
349 case USERIAL_OP_GET_BT_WAKE_STATE:
350 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
351 break;
352 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
353
354 default:
355 break;
356 }
357 }
358
359 /*******************************************************************************
360 **
361 ** Function userial_set_port
362 **
363 ** Description Configure UART port name
364 **
365 ** Returns 0 : Success
366 ** Otherwise : Fail
367 **
368 *******************************************************************************/
userial_set_port(char * p_conf_name,char * p_conf_value,int param)369 int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
370 {
371 strcpy(vnd_userial.port_name, p_conf_value);
372
373 return 0;
374 }
375
376