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 <string.h>
35 #include "bt_vendor_brcm.h"
36 #include "userial.h"
37 #include "userial_vendor.h"
38 #include <unistd.h>
39
40 /******************************************************************************
41 ** Constants & Macros
42 ******************************************************************************/
43
44 #ifndef VNDUSERIAL_DBG
45 #define VNDUSERIAL_DBG FALSE
46 #endif
47
48 #if (VNDUSERIAL_DBG == TRUE)
49 #define VNDUSERIALDBG(param, ...) {ALOGD(param, ## __VA_ARGS__);}
50 #else
51 #define VNDUSERIALDBG(param, ...) {}
52 #endif
53
54 #define VND_PORT_NAME_MAXLEN 256
55
56 /******************************************************************************
57 ** Local type definitions
58 ******************************************************************************/
59
60 /* vendor serial control block */
61 typedef struct
62 {
63 int fd; /* fd to Bluetooth device */
64 struct termios termios; /* serial terminal of BT port */
65 char port_name[VND_PORT_NAME_MAXLEN];
66 } vnd_userial_cb_t;
67
68 /******************************************************************************
69 ** Static variables
70 ******************************************************************************/
71
72 static vnd_userial_cb_t vnd_userial;
73
74 /*****************************************************************************
75 ** Helper Functions
76 *****************************************************************************/
77
78 /*******************************************************************************
79 **
80 ** Function userial_to_tcio_baud
81 **
82 ** Description helper function converts USERIAL baud rates into TCIO
83 ** conforming baud rates
84 **
85 ** Returns TRUE/FALSE
86 **
87 *******************************************************************************/
userial_to_tcio_baud(uint8_t cfg_baud,uint32_t * baud)88 uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
89 {
90 if (cfg_baud == USERIAL_BAUD_115200)
91 *baud = B115200;
92 else if (cfg_baud == USERIAL_BAUD_4M)
93 *baud = B4000000;
94 else if (cfg_baud == USERIAL_BAUD_3M)
95 *baud = B3000000;
96 else if (cfg_baud == USERIAL_BAUD_2M)
97 *baud = B2000000;
98 else if (cfg_baud == USERIAL_BAUD_1M)
99 *baud = B1000000;
100 else if (cfg_baud == USERIAL_BAUD_921600)
101 *baud = B921600;
102 else if (cfg_baud == USERIAL_BAUD_460800)
103 *baud = B460800;
104 else if (cfg_baud == USERIAL_BAUD_230400)
105 *baud = B230400;
106 else if (cfg_baud == USERIAL_BAUD_57600)
107 *baud = B57600;
108 else if (cfg_baud == USERIAL_BAUD_19200)
109 *baud = B19200;
110 else if (cfg_baud == USERIAL_BAUD_9600)
111 *baud = B9600;
112 else if (cfg_baud == USERIAL_BAUD_1200)
113 *baud = B1200;
114 else if (cfg_baud == USERIAL_BAUD_600)
115 *baud = B600;
116 else
117 {
118 ALOGE( "userial vendor open: unsupported baud idx %i", cfg_baud);
119 *baud = B115200;
120 return FALSE;
121 }
122
123 return TRUE;
124 }
125
126 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
127 /*******************************************************************************
128 **
129 ** Function userial_ioctl_init_bt_wake
130 **
131 ** Description helper function to set the open state of the bt_wake if ioctl
132 ** is used. it should not hurt in the rfkill case but it might
133 ** be better to compile it out.
134 **
135 ** Returns none
136 **
137 *******************************************************************************/
userial_ioctl_init_bt_wake(int fd)138 void userial_ioctl_init_bt_wake(int fd)
139 {
140 uint32_t bt_wake_state;
141
142 #if (BT_WAKE_USERIAL_LDISC==TRUE)
143 int ldisc = N_BRCM_HCI; /* brcm sleep mode support line discipline */
144
145 /* attempt to load enable discipline driver */
146 if (ioctl(vnd_userial.fd, TIOCSETD, &ldisc) < 0)
147 {
148 VNDUSERIALDBG("USERIAL_Open():fd %d, TIOCSETD failed: error %d for ldisc: %d",
149 fd, errno, ldisc);
150 }
151 #endif
152
153
154
155 /* assert BT_WAKE through ioctl */
156 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
157 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
158 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
159 bt_wake_state);
160 }
161 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
162
163
164 /*****************************************************************************
165 ** Userial Vendor API Functions
166 *****************************************************************************/
167
168 /*******************************************************************************
169 **
170 ** Function userial_vendor_init
171 **
172 ** Description Initialize userial vendor-specific control block
173 **
174 ** Returns None
175 **
176 *******************************************************************************/
userial_vendor_init(void)177 void userial_vendor_init(void)
178 {
179 vnd_userial.fd = -1;
180 snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", \
181 BLUETOOTH_UART_DEVICE_PORT);
182 }
183
184 /*******************************************************************************
185 **
186 ** Function userial_vendor_open
187 **
188 ** Description Open the serial port with the given configuration
189 **
190 ** Returns device fd
191 **
192 *******************************************************************************/
userial_vendor_open(tUSERIAL_CFG * p_cfg)193 int userial_vendor_open(tUSERIAL_CFG *p_cfg)
194 {
195 uint32_t baud;
196 uint8_t data_bits;
197 uint16_t parity;
198 uint8_t stop_bits;
199
200 vnd_userial.fd = -1;
201
202 if (!userial_to_tcio_baud(p_cfg->baud, &baud))
203 {
204 return -1;
205 }
206
207 if(p_cfg->fmt & USERIAL_DATABITS_8)
208 data_bits = CS8;
209 else if(p_cfg->fmt & USERIAL_DATABITS_7)
210 data_bits = CS7;
211 else if(p_cfg->fmt & USERIAL_DATABITS_6)
212 data_bits = CS6;
213 else if(p_cfg->fmt & USERIAL_DATABITS_5)
214 data_bits = CS5;
215 else
216 {
217 ALOGE("userial vendor open: unsupported data bits");
218 return -1;
219 }
220
221 if(p_cfg->fmt & USERIAL_PARITY_NONE)
222 parity = 0;
223 else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
224 parity = PARENB;
225 else if(p_cfg->fmt & USERIAL_PARITY_ODD)
226 parity = (PARENB | PARODD);
227 else
228 {
229 ALOGE("userial vendor open: unsupported parity bit mode");
230 return -1;
231 }
232
233 if(p_cfg->fmt & USERIAL_STOPBITS_1)
234 stop_bits = 0;
235 else if(p_cfg->fmt & USERIAL_STOPBITS_2)
236 stop_bits = CSTOPB;
237 else
238 {
239 ALOGE("userial vendor open: unsupported stop bits");
240 return -1;
241 }
242
243 ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
244
245 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1)
246 {
247 ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
248 return -1;
249 }
250
251 tcflush(vnd_userial.fd, TCIOFLUSH);
252
253 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
254 cfmakeraw(&vnd_userial.termios);
255 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
256 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
257 tcflush(vnd_userial.fd, TCIOFLUSH);
258
259 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
260 tcflush(vnd_userial.fd, TCIOFLUSH);
261 tcflush(vnd_userial.fd, TCIOFLUSH);
262
263 /* set input/output baudrate */
264 cfsetospeed(&vnd_userial.termios, baud);
265 cfsetispeed(&vnd_userial.termios, baud);
266 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
267
268 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
269 userial_ioctl_init_bt_wake(vnd_userial.fd);
270 #endif
271
272 ALOGI("device fd = %d open", vnd_userial.fd);
273
274 return vnd_userial.fd;
275 }
276
277 /*******************************************************************************
278 **
279 ** Function userial_vendor_close
280 **
281 ** Description Conduct vendor-specific close work
282 **
283 ** Returns None
284 **
285 *******************************************************************************/
userial_vendor_close(void)286 void userial_vendor_close(void)
287 {
288 int result;
289
290 if (vnd_userial.fd == -1)
291 return;
292
293 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
294 /* de-assert bt_wake BEFORE closing port */
295 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
296 #endif
297
298 ALOGI("device fd = %d close", vnd_userial.fd);
299 // flush Tx before close to make sure no chars in buffer
300 tcflush(vnd_userial.fd, TCIOFLUSH);
301 if ((result = close(vnd_userial.fd)) < 0)
302 ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
303
304 vnd_userial.fd = -1;
305 }
306
307 /*******************************************************************************
308 **
309 ** Function userial_vendor_set_baud
310 **
311 ** Description Set new baud rate
312 **
313 ** Returns None
314 **
315 *******************************************************************************/
userial_vendor_set_baud(uint8_t userial_baud)316 void userial_vendor_set_baud(uint8_t userial_baud)
317 {
318 uint32_t tcio_baud;
319
320 userial_to_tcio_baud(userial_baud, &tcio_baud);
321
322 cfsetospeed(&vnd_userial.termios, tcio_baud);
323 cfsetispeed(&vnd_userial.termios, tcio_baud);
324 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
325 }
326
327 /*******************************************************************************
328 **
329 ** Function userial_vendor_ioctl
330 **
331 ** Description ioctl inteface
332 **
333 ** Returns None
334 **
335 *******************************************************************************/
userial_vendor_ioctl(userial_vendor_ioctl_op_t op,void * p_data)336 void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
337 {
338 switch(op)
339 {
340 #if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
341 case USERIAL_OP_ASSERT_BT_WAKE:
342 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
343 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
344 break;
345
346 case USERIAL_OP_DEASSERT_BT_WAKE:
347 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
348 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
349 break;
350
351 case USERIAL_OP_GET_BT_WAKE_STATE:
352 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
353 break;
354 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
355
356 default:
357 break;
358 }
359 }
360
361 /*******************************************************************************
362 **
363 ** Function userial_set_port
364 **
365 ** Description Configure UART port name
366 **
367 ** Returns 0 : Success
368 ** Otherwise : Fail
369 **
370 *******************************************************************************/
userial_set_port(char * p_conf_name,char * p_conf_value,int param)371 int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
372 {
373 strcpy(vnd_userial.port_name, p_conf_value);
374
375 return 0;
376 }
377
378