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 /* assert BT_WAKE through ioctl */
141 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
142 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
143 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
144 bt_wake_state);
145 }
146 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
147
148
149 /*****************************************************************************
150 ** Userial Vendor API Functions
151 *****************************************************************************/
152
153 /*******************************************************************************
154 **
155 ** Function userial_vendor_init
156 **
157 ** Description Initialize userial vendor-specific control block
158 **
159 ** Returns None
160 **
161 *******************************************************************************/
userial_vendor_init(void)162 void userial_vendor_init(void)
163 {
164 vnd_userial.fd = -1;
165 snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", \
166 BLUETOOTH_UART_DEVICE_PORT);
167 }
168
169 /*******************************************************************************
170 **
171 ** Function userial_vendor_open
172 **
173 ** Description Open the serial port with the given configuration
174 **
175 ** Returns device fd
176 **
177 *******************************************************************************/
userial_vendor_open(tUSERIAL_CFG * p_cfg)178 int userial_vendor_open(tUSERIAL_CFG *p_cfg)
179 {
180 uint32_t baud;
181 uint8_t data_bits;
182 uint16_t parity;
183 uint8_t stop_bits;
184
185 vnd_userial.fd = -1;
186
187 if (!userial_to_tcio_baud(p_cfg->baud, &baud))
188 {
189 return -1;
190 }
191
192 if(p_cfg->fmt & USERIAL_DATABITS_8)
193 data_bits = CS8;
194 else if(p_cfg->fmt & USERIAL_DATABITS_7)
195 data_bits = CS7;
196 else if(p_cfg->fmt & USERIAL_DATABITS_6)
197 data_bits = CS6;
198 else if(p_cfg->fmt & USERIAL_DATABITS_5)
199 data_bits = CS5;
200 else
201 {
202 ALOGE("userial vendor open: unsupported data bits");
203 return -1;
204 }
205
206 if(p_cfg->fmt & USERIAL_PARITY_NONE)
207 parity = 0;
208 else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
209 parity = PARENB;
210 else if(p_cfg->fmt & USERIAL_PARITY_ODD)
211 parity = (PARENB | PARODD);
212 else
213 {
214 ALOGE("userial vendor open: unsupported parity bit mode");
215 return -1;
216 }
217
218 if(p_cfg->fmt & USERIAL_STOPBITS_1)
219 stop_bits = 0;
220 else if(p_cfg->fmt & USERIAL_STOPBITS_2)
221 stop_bits = CSTOPB;
222 else
223 {
224 ALOGE("userial vendor open: unsupported stop bits");
225 return -1;
226 }
227
228 ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
229
230 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1)
231 {
232 ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
233 return -1;
234 }
235
236 tcflush(vnd_userial.fd, TCIOFLUSH);
237
238 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
239 cfmakeraw(&vnd_userial.termios);
240 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
241 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
242 tcflush(vnd_userial.fd, TCIOFLUSH);
243
244 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
245 tcflush(vnd_userial.fd, TCIOFLUSH);
246 tcflush(vnd_userial.fd, TCIOFLUSH);
247
248 /* set input/output baudrate */
249 cfsetospeed(&vnd_userial.termios, baud);
250 cfsetispeed(&vnd_userial.termios, baud);
251 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
252
253 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
254 userial_ioctl_init_bt_wake(vnd_userial.fd);
255 #endif
256
257 ALOGI("device fd = %d open", vnd_userial.fd);
258
259 return vnd_userial.fd;
260 }
261
262 /*******************************************************************************
263 **
264 ** Function userial_vendor_close
265 **
266 ** Description Conduct vendor-specific close work
267 **
268 ** Returns None
269 **
270 *******************************************************************************/
userial_vendor_close(void)271 void userial_vendor_close(void)
272 {
273 int result;
274
275 if (vnd_userial.fd == -1)
276 return;
277
278 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
279 /* de-assert bt_wake BEFORE closing port */
280 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
281 #endif
282
283 ALOGI("device fd = %d close", vnd_userial.fd);
284
285 if ((result = close(vnd_userial.fd)) < 0)
286 ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
287
288 vnd_userial.fd = -1;
289 }
290
291 /*******************************************************************************
292 **
293 ** Function userial_vendor_set_baud
294 **
295 ** Description Set new baud rate
296 **
297 ** Returns None
298 **
299 *******************************************************************************/
userial_vendor_set_baud(uint8_t userial_baud)300 void userial_vendor_set_baud(uint8_t userial_baud)
301 {
302 uint32_t tcio_baud;
303
304 userial_to_tcio_baud(userial_baud, &tcio_baud);
305
306 cfsetospeed(&vnd_userial.termios, tcio_baud);
307 cfsetispeed(&vnd_userial.termios, tcio_baud);
308 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
309 }
310
311 /*******************************************************************************
312 **
313 ** Function userial_vendor_ioctl
314 **
315 ** Description ioctl inteface
316 **
317 ** Returns None
318 **
319 *******************************************************************************/
userial_vendor_ioctl(userial_vendor_ioctl_op_t op,void * p_data)320 void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
321 {
322 switch(op)
323 {
324 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
325 case USERIAL_OP_ASSERT_BT_WAKE:
326 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
327 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
328 break;
329
330 case USERIAL_OP_DEASSERT_BT_WAKE:
331 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
332 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
333 break;
334
335 case USERIAL_OP_GET_BT_WAKE_STATE:
336 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
337 break;
338 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
339
340 default:
341 break;
342 }
343 }
344
345 /*******************************************************************************
346 **
347 ** Function userial_set_port
348 **
349 ** Description Configure UART port name
350 **
351 ** Returns 0 : Success
352 ** Otherwise : Fail
353 **
354 *******************************************************************************/
userial_set_port(char * p_conf_name,char * p_conf_value,int param)355 int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
356 {
357 strcpy(vnd_userial.port_name, p_conf_value);
358
359 return 0;
360 }
361
362