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path: root/src/userial_vendor.c (plain)
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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
39/******************************************************************************
40** Constants & Macros
41******************************************************************************/
42
43#ifndef VNDUSERIAL_DBG
44#define VNDUSERIAL_DBG FALSE
45#endif
46
47#if (VNDUSERIAL_DBG == TRUE)
48#define VNDUSERIALDBG(param, ...) {ALOGD(param, ## __VA_ARGS__);}
49#else
50#define VNDUSERIALDBG(param, ...) {}
51#endif
52
53#define VND_PORT_NAME_MAXLEN 256
54
55/******************************************************************************
56** Local type definitions
57******************************************************************************/
58
59/* vendor serial control block */
60typedef struct
61{
62 int fd; /* fd to Bluetooth device */
63 struct termios termios; /* serial terminal of BT port */
64 char port_name[VND_PORT_NAME_MAXLEN];
65} vnd_userial_cb_t;
66
67/******************************************************************************
68** Static variables
69******************************************************************************/
70
71static vnd_userial_cb_t vnd_userial;
72
73/*****************************************************************************
74** Helper Functions
75*****************************************************************************/
76
77/*******************************************************************************
78**
79** Function userial_to_tcio_baud
80**
81** Description helper function converts USERIAL baud rates into TCIO
82** conforming baud rates
83**
84** Returns TRUE/FALSE
85**
86*******************************************************************************/
87uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
88{
89 if (cfg_baud == USERIAL_BAUD_115200)
90 *baud = B115200;
91 else if (cfg_baud == USERIAL_BAUD_4M)
92 *baud = B4000000;
93 else if (cfg_baud == USERIAL_BAUD_3M)
94 *baud = B3000000;
95 else if (cfg_baud == USERIAL_BAUD_2M)
96 *baud = B2000000;
97 else if (cfg_baud == USERIAL_BAUD_1M)
98 *baud = B1000000;
99 else if (cfg_baud == USERIAL_BAUD_921600)
100 *baud = B921600;
101 else if (cfg_baud == USERIAL_BAUD_460800)
102 *baud = B460800;
103 else if (cfg_baud == USERIAL_BAUD_230400)
104 *baud = B230400;
105 else if (cfg_baud == USERIAL_BAUD_57600)
106 *baud = B57600;
107 else if (cfg_baud == USERIAL_BAUD_19200)
108 *baud = B19200;
109 else if (cfg_baud == USERIAL_BAUD_9600)
110 *baud = B9600;
111 else if (cfg_baud == USERIAL_BAUD_1200)
112 *baud = B1200;
113 else if (cfg_baud == USERIAL_BAUD_600)
114 *baud = B600;
115 else
116 {
117 ALOGE( "userial vendor open: unsupported baud idx %i", cfg_baud);
118 *baud = B115200;
119 return FALSE;
120 }
121
122 return TRUE;
123}
124
125#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
126/*******************************************************************************
127**
128** Function userial_ioctl_init_bt_wake
129**
130** Description helper function to set the open state of the bt_wake if ioctl
131** is used. it should not hurt in the rfkill case but it might
132** be better to compile it out.
133**
134** Returns none
135**
136*******************************************************************************/
137void userial_ioctl_init_bt_wake(int fd)
138{
139 uint32_t bt_wake_state;
140
141#if (BT_WAKE_USERIAL_LDISC==TRUE)
142 int ldisc = N_BRCM_HCI; /* brcm sleep mode support line discipline */
143
144 /* attempt to load enable discipline driver */
145 if (ioctl(vnd_userial.fd, TIOCSETD, &ldisc) < 0)
146 {
147 VNDUSERIALDBG("USERIAL_Open():fd %d, TIOCSETD failed: error %d for ldisc: %d",
148 fd, errno, ldisc);
149 }
150#endif
151
152
153
154 /* assert BT_WAKE through ioctl */
155 ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
156 ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
157 VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
158 bt_wake_state);
159}
160#endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
161
162
163/*****************************************************************************
164** Userial Vendor API Functions
165*****************************************************************************/
166
167/*******************************************************************************
168**
169** Function userial_vendor_init
170**
171** Description Initialize userial vendor-specific control block
172**
173** Returns None
174**
175*******************************************************************************/
176void userial_vendor_init(void)
177{
178 vnd_userial.fd = -1;
179 snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", \
180 BLUETOOTH_UART_DEVICE_PORT);
181}
182
183/*******************************************************************************
184**
185** Function userial_vendor_open
186**
187** Description Open the serial port with the given configuration
188**
189** Returns device fd
190**
191*******************************************************************************/
192int userial_vendor_open(tUSERIAL_CFG *p_cfg)
193{
194 uint32_t baud;
195 uint8_t data_bits;
196 uint16_t parity;
197 uint8_t stop_bits;
198 uint8_t cnt = 0;
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);
244open_retry:
245 if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) < 0)
246 {
247 ALOGE("userial vendor open: unable to open %s, retrying....", vnd_userial.port_name);
248 usleep(50000);
249 cnt++;
250 if (cnt < 40)
251 goto open_retry;
252 ALOGE("userial vendor open fail!!");
253 return -1;
254 }
255 ALOGE("userial vendor open success!!");
256
257 tcflush(vnd_userial.fd, TCIOFLUSH);
258
259 tcgetattr(vnd_userial.fd, &vnd_userial.termios);
260 cfmakeraw(&vnd_userial.termios);
261 vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
262 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
263 tcflush(vnd_userial.fd, TCIOFLUSH);
264
265 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
266 tcflush(vnd_userial.fd, TCIOFLUSH);
267 tcflush(vnd_userial.fd, TCIOFLUSH);
268
269 /* set input/output baudrate */
270 cfsetospeed(&vnd_userial.termios, baud);
271 cfsetispeed(&vnd_userial.termios, baud);
272 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
273
274#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
275 userial_ioctl_init_bt_wake(vnd_userial.fd);
276#endif
277
278 ALOGI("device fd = %d open", vnd_userial.fd);
279
280 return vnd_userial.fd;
281}
282
283/*******************************************************************************
284**
285** Function userial_vendor_close
286**
287** Description Conduct vendor-specific close work
288**
289** Returns None
290**
291*******************************************************************************/
292void userial_vendor_close(void)
293{
294 int result;
295
296 if (vnd_userial.fd == -1)
297 return;
298
299#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
300 /* de-assert bt_wake BEFORE closing port */
301 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
302#endif
303
304 ALOGI("device fd = %d close", vnd_userial.fd);
305 // flush Tx before close to make sure no chars in buffer
306 tcflush(vnd_userial.fd, TCIOFLUSH);
307 if ((result = close(vnd_userial.fd)) < 0)
308 ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
309
310 vnd_userial.fd = -1;
311}
312
313/*******************************************************************************
314**
315** Function userial_vendor_set_baud
316**
317** Description Set new baud rate
318**
319** Returns None
320**
321*******************************************************************************/
322void userial_vendor_set_baud(uint8_t userial_baud)
323{
324 uint32_t tcio_baud;
325
326 userial_to_tcio_baud(userial_baud, &tcio_baud);
327
328 cfsetospeed(&vnd_userial.termios, tcio_baud);
329 cfsetispeed(&vnd_userial.termios, tcio_baud);
330 tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
331}
332
333/*******************************************************************************
334**
335** Function userial_vendor_ioctl
336**
337** Description ioctl inteface
338**
339** Returns None
340**
341*******************************************************************************/
342void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
343{
344 switch(op)
345 {
346#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
347 case USERIAL_OP_ASSERT_BT_WAKE:
348 VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
349 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
350 break;
351
352 case USERIAL_OP_DEASSERT_BT_WAKE:
353 VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
354 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
355 break;
356
357 case USERIAL_OP_GET_BT_WAKE_STATE:
358 ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
359 break;
360#endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
361
362 default:
363 break;
364 }
365}
366
367/*******************************************************************************
368**
369** Function userial_set_port
370**
371** Description Configure UART port name
372**
373** Returns 0 : Success
374** Otherwise : Fail
375**
376*******************************************************************************/
377int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
378{
379 strcpy(vnd_userial.port_name, p_conf_value);
380
381 return 0;
382}
383
384
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