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 <termios.h>
30 #include <fcntl.h>
31 #include <errno.h>
32 #include <stdio.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <utils/Log.h>
36 #include "bt_vendor_brcm.h"
37 #include "userial.h"
38 #include "userial_vendor.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, ...) \
50 { \
51 HILOGD(param, ##__VA_ARGS__); \
52 }
53 #else
54 #define VNDUSERIALDBG(param, ...) \
55 { \
56 HILOGD(param, ##__VA_ARGS__); \
57 }
58 #endif
59
60 #define VND_PORT_NAME_MAXLEN 256
61
62 /******************************************************************************
63 ** Local type definitions
64 ******************************************************************************/
65
66 /* vendor serial control block */
67 typedef struct {
68 int fd; /* fd to Bluetooth device */
69 struct termios termios; /* serial terminal of BT port */
70 char port_name[VND_PORT_NAME_MAXLEN];
71 } vnd_userial_cb_t;
72
73 /******************************************************************************
74 ** Static variables
75 ******************************************************************************/
76
77 static vnd_userial_cb_t vnd_userial;
78
79 /*****************************************************************************
80 ** Helper Functions
81 *****************************************************************************/
82
83 /*******************************************************************************
84 **
85 ** Function userial_to_tcio_baud
86 **
87 ** Description helper function converts USERIAL baud rates into TCIO
88 ** conforming baud rates
89 **
90 ** Returns TRUE/FALSE
91 **
92 *******************************************************************************/
userial_to_tcio_baud(uint8_t cfg_baud,uint32_t * baud)93 uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
94 {
95 if (cfg_baud == USERIAL_BAUD_115200) {
96 *baud = B115200;
97 } else if (cfg_baud == USERIAL_BAUD_4M) {
98 *baud = B4000000;
99 } else if (cfg_baud == USERIAL_BAUD_3M) {
100 *baud = B3000000;
101 } else if (cfg_baud == USERIAL_BAUD_2M) {
102 *baud = B2000000;
103 } else if (cfg_baud == USERIAL_BAUD_1_5M) {
104 *baud = B1500000;
105 } else if (cfg_baud == USERIAL_BAUD_1M) {
106 *baud = B1000000;
107 } else if (cfg_baud == USERIAL_BAUD_921600) {
108 *baud = B921600;
109 } else if (cfg_baud == USERIAL_BAUD_460800) {
110 *baud = B460800;
111 } else if (cfg_baud == USERIAL_BAUD_230400) {
112 *baud = B230400;
113 } else if (cfg_baud == USERIAL_BAUD_57600) {
114 *baud = B57600;
115 } else if (cfg_baud == USERIAL_BAUD_19200) {
116 *baud = B19200;
117 } else if (cfg_baud == USERIAL_BAUD_9600) {
118 *baud = B9600;
119 } else if (cfg_baud == USERIAL_BAUD_1200) {
120 *baud = B1200;
121 } else if (cfg_baud == USERIAL_BAUD_600) {
122 *baud = B600;
123 } else {
124 HILOGE("userial vendor open: unsupported baud idx %i", cfg_baud);
125 *baud = B115200;
126 return FALSE;
127 }
128
129 return TRUE;
130 }
131
132 #if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
133 /*******************************************************************************
134 **
135 ** Function userial_ioctl_init_bt_wake
136 **
137 ** Description helper function to set the open state of the bt_wake if ioctl
138 ** is used. it should not hurt in the rfkill case but it might
139 ** be better to compile it out.
140 **
141 ** Returns none
142 **
143 *******************************************************************************/
userial_ioctl_init_bt_wake(int fd)144 void userial_ioctl_init_bt_wake(int fd)
145 {
146 uint32_t bt_wake_state;
147
148 #if (BT_WAKE_USERIAL_LDISC == TRUE)
149 int ldisc = N_BRCM_HCI; /* brcm sleep mode support line discipline */
150
151 /* attempt to load enable discipline driver */
152 if (ioctl(vnd_userial.fd, TIOCSETD, &ldisc) < 0) {
153 VNDUSERIALDBG(
154 "USERIAL_Open():fd %d, TIOCSETD failed: error %d for ldisc: %d", fd,
155 errno, ldisc);
156 }
157 #endif
158
159 /* assert BT_WAKE through ioctl */
160 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
161 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
162 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i",
163 bt_wake_state);
164 }
165 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
166
167 /*****************************************************************************
168 ** Userial Vendor API Functions
169 *****************************************************************************/
170
171 /*******************************************************************************
172 **
173 ** Function userial_vendor_init
174 **
175 ** Description Initialize userial vendor-specific control block
176 **
177 ** Returns None
178 **
179 *******************************************************************************/
userial_vendor_init(void)180 void userial_vendor_init(void)
181 {
182 vnd_userial.fd = -1;
183 (void)snprintf_s(vnd_userial.port_name, VND_PORT_NAME_MAXLEN,
184 VND_PORT_NAME_MAXLEN, "%s", BLUETOOTH_UART_DEVICE_PORT);
185 }
186
187 /*******************************************************************************
188 **
189 ** Function userial_vendor_open
190 **
191 ** Description Open the serial port with the given configuration
192 **
193 ** Returns device fd
194 **
195 *******************************************************************************/
userial_vendor_open(tUSERIAL_CFG * p_cfg)196 int userial_vendor_open(tUSERIAL_CFG *p_cfg)
197 {
198 uint32_t baud;
199 uint8_t data_bits;
200 uint16_t parity;
201 uint8_t stop_bits;
202
203 (void) data_bits;
204 (void) parity;
205
206 vnd_userial.fd = -1;
207
208 if (!userial_to_tcio_baud(p_cfg->baud, &baud)) {
209 return -1;
210 }
211
212 if (p_cfg->fmt & USERIAL_DATABITS_8) {
213 data_bits = CS8;
214 } else if (p_cfg->fmt & USERIAL_DATABITS_7) {
215 data_bits = CS7;
216 } else if (p_cfg->fmt & USERIAL_DATABITS_6) {
217 data_bits = CS6;
218 } else if (p_cfg->fmt & USERIAL_DATABITS_5) {
219 data_bits = CS5;
220 }
221
222 if (p_cfg->fmt & USERIAL_PARITY_NONE) {
223 parity = 0;
224 } else if (p_cfg->fmt & USERIAL_PARITY_EVEN) {
225 parity = PARENB;
226 } else if (p_cfg->fmt & USERIAL_PARITY_ODD) {
227 parity = (PARENB | PARODD);
228 }
229
230 if (p_cfg->fmt & USERIAL_STOPBITS_1) {
231 stop_bits = 0;
232 } else if (p_cfg->fmt & USERIAL_STOPBITS_2) {
233 stop_bits = CSTOPB;
234 }
235
236 HILOGI("userial vendor open: opening %s", vnd_userial.port_name);
237
238 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1) {
239 HILOGI("userial vendor open: port opening error");
240 return -1;
241 }
242
243 tcflush(vnd_userial.fd, TCIOFLUSH);
244
245 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
246 cfmakeraw(&vnd_userial.termios);
247 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
248 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
249 tcflush(vnd_userial.fd, TCIOFLUSH);
250
251 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
252 tcflush(vnd_userial.fd, TCIOFLUSH);
253 tcflush(vnd_userial.fd, TCIOFLUSH);
254
255 /* set input/output baudrate */
256 cfsetospeed(&vnd_userial.termios, baud);
257 cfsetispeed(&vnd_userial.termios, baud);
258 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
259
260 #if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
261 userial_ioctl_init_bt_wake(vnd_userial.fd);
262 #endif
263
264 HILOGI("device fd = %d open", vnd_userial.fd);
265 return vnd_userial.fd;
266 }
267
268 /*******************************************************************************
269 **
270 ** Function userial_vendor_close
271 **
272 ** Description Conduct vendor-specific close work
273 **
274 ** Returns None
275 **
276 *******************************************************************************/
userial_vendor_close(void)277 void userial_vendor_close(void)
278 {
279 int result;
280
281 if (vnd_userial.fd == -1) {
282 return;
283 }
284
285 #if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
286 /* de-assert bt_wake BEFORE closing port */
287 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
288 #endif
289
290 HILOGI("device fd = %d close", vnd_userial.fd);
291 // flush Tx before close to make sure no chars in buffer
292 tcflush(vnd_userial.fd, TCIOFLUSH);
293 if ((result = close(vnd_userial.fd)) < 0) {
294 HILOGE("close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
295 }
296
297 vnd_userial.fd = -1;
298 }
299
300 /*******************************************************************************
301 **
302 ** Function userial_vendor_set_baud
303 **
304 ** Description Set new baud rate
305 **
306 ** Returns None
307 **
308 *******************************************************************************/
userial_vendor_set_baud(uint8_t userial_baud)309 void userial_vendor_set_baud(uint8_t userial_baud)
310 {
311 uint32_t tcio_baud;
312
313 if (USERIAL_VENDOR_SET_BAUD_DELAY_US > 0) {
314 usleep(USERIAL_VENDOR_SET_BAUD_DELAY_US);
315 }
316
317 userial_to_tcio_baud(userial_baud, &tcio_baud);
318
319 cfsetospeed(&vnd_userial.termios, tcio_baud);
320 cfsetispeed(&vnd_userial.termios, tcio_baud);
321 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
322 }
323
324 /*******************************************************************************
325 **
326 ** Function userial_vendor_ioctl
327 **
328 ** Description ioctl inteface
329 **
330 ** Returns None
331 **
332 *******************************************************************************/
userial_vendor_ioctl(userial_vendor_ioctl_op_t op,void * p_data)333 void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
334 {
335 switch (op) {
336 #if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
337 case USERIAL_OP_ASSERT_BT_WAKE:
338 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
339 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
340 break;
341
342 case USERIAL_OP_DEASSERT_BT_WAKE:
343 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
344 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
345 break;
346
347 case USERIAL_OP_GET_BT_WAKE_STATE:
348 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
349 break;
350 #endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
351
352 default:
353 break;
354 }
355 }
356
357 /*******************************************************************************
358 **
359 ** Function userial_set_port
360 **
361 ** Description Configure UART port name
362 **
363 ** Returns 0 : Success
364 ** Otherwise : Fail
365 **
366 *******************************************************************************/
userial_set_port(char * p_conf_name,char * p_conf_value,int param)367 int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
368 {
369 (void)strcpy_s(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, p_conf_value);
370
371 return 0;
372 }
373