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 */
67typedef 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
77static 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*******************************************************************************/
93uint8_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*******************************************************************************/
144void 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("USERIAL_Open():fd %d, TIOCSETD failed: error %d for ldisc: %d",
154                      fd, errno, ldisc);
155    }
156#endif
157
158    /* assert BT_WAKE through ioctl */
159    ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
160    ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
161    VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i",
162                  bt_wake_state);
163}
164#endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
165
166/*****************************************************************************
167**   Userial Vendor API Functions
168*****************************************************************************/
169
170/*******************************************************************************
171**
172** Function        userial_vendor_init
173**
174** Description     Initialize userial vendor-specific control block
175**
176** Returns         None
177**
178*******************************************************************************/
179void userial_vendor_init(void)
180{
181    vnd_userial.fd = -1;
182    (void)snprintf_s(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, VND_PORT_NAME_MAXLEN, "%s",
183        BLUETOOTH_UART_DEVICE_PORT);
184}
185
186/*******************************************************************************
187**
188** Function        userial_vendor_open
189**
190** Description     Open the serial port with the given configuration
191**
192** Returns         device fd
193**
194*******************************************************************************/
195int userial_vendor_open(tUSERIAL_CFG *p_cfg)
196{
197    uint32_t baud;
198    uint8_t data_bits;
199    uint16_t parity;
200    uint8_t stop_bits;
201
202    vnd_userial.fd = -1;
203
204    if (!userial_to_tcio_baud(p_cfg->baud, &baud)) {
205        return -1;
206    }
207
208    if (p_cfg->fmt & USERIAL_DATABITS_8)
209        data_bits = CS8;
210    else if (p_cfg->fmt & USERIAL_DATABITS_7)
211        data_bits = CS7;
212    else if (p_cfg->fmt & USERIAL_DATABITS_6)
213        data_bits = CS6;
214    else if (p_cfg->fmt & USERIAL_DATABITS_5)
215        data_bits = CS5;
216
217    if (p_cfg->fmt & USERIAL_PARITY_NONE)
218        parity = 0;
219    else if (p_cfg->fmt & USERIAL_PARITY_EVEN)
220        parity = PARENB;
221    else if (p_cfg->fmt & USERIAL_PARITY_ODD)
222        parity = (PARENB | PARODD);
223
224    if (p_cfg->fmt & USERIAL_STOPBITS_1)
225        stop_bits = 0;
226    else if (p_cfg->fmt & USERIAL_STOPBITS_2)
227        stop_bits = CSTOPB;
228
229    HILOGI("userial vendor open: opening %s", vnd_userial.port_name);
230
231    if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1) {
232        return -1;
233    }
234
235    tcflush(vnd_userial.fd, TCIOFLUSH);
236
237    tcgetattr(vnd_userial.fd, &vnd_userial.termios);
238    cfmakeraw(&vnd_userial.termios);
239    vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
240    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
241    tcflush(vnd_userial.fd, TCIOFLUSH);
242
243    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
244    tcflush(vnd_userial.fd, TCIOFLUSH);
245    tcflush(vnd_userial.fd, TCIOFLUSH);
246
247    /* set input/output baudrate */
248    cfsetospeed(&vnd_userial.termios, baud);
249    cfsetispeed(&vnd_userial.termios, baud);
250    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
251
252#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
253    userial_ioctl_init_bt_wake(vnd_userial.fd);
254#endif
255
256    HILOGI("device fd = %d open", vnd_userial.fd);
257    return vnd_userial.fd;
258}
259
260/*******************************************************************************
261**
262** Function        userial_vendor_close
263**
264** Description     Conduct vendor-specific close work
265**
266** Returns         None
267**
268*******************************************************************************/
269void userial_vendor_close(void)
270{
271    int result;
272
273    if (vnd_userial.fd == -1) {
274        return;
275    }
276
277#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
278    /* de-assert bt_wake BEFORE closing port */
279    ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
280#endif
281
282    HILOGI("device fd = %d close", vnd_userial.fd);
283    // flush Tx before close to make sure no chars in buffer
284    tcflush(vnd_userial.fd, TCIOFLUSH);
285    if ((result = close(vnd_userial.fd)) < 0) {
286        HILOGE("close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
287    }
288
289    vnd_userial.fd = -1;
290}
291
292/*******************************************************************************
293**
294** Function        userial_vendor_set_baud
295**
296** Description     Set new baud rate
297**
298** Returns         None
299**
300*******************************************************************************/
301void userial_vendor_set_baud(uint8_t userial_baud)
302{
303    uint32_t tcio_baud;
304
305    if (USERIAL_VENDOR_SET_BAUD_DELAY_US > 0) {
306        usleep(USERIAL_VENDOR_SET_BAUD_DELAY_US);
307    }
308
309    userial_to_tcio_baud(userial_baud, &tcio_baud);
310
311    cfsetospeed(&vnd_userial.termios, tcio_baud);
312    cfsetispeed(&vnd_userial.termios, tcio_baud);
313    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
314}
315
316/*******************************************************************************
317**
318** Function        userial_vendor_ioctl
319**
320** Description     ioctl inteface
321**
322** Returns         None
323**
324*******************************************************************************/
325void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
326{
327    switch (op) {
328#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
329        case USERIAL_OP_ASSERT_BT_WAKE:
330            VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
331            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
332            break;
333
334        case USERIAL_OP_DEASSERT_BT_WAKE:
335            VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
336            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
337            break;
338
339        case USERIAL_OP_GET_BT_WAKE_STATE:
340            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
341            break;
342#endif //  (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
343
344        default:
345            break;
346    }
347}
348
349/*******************************************************************************
350**
351** Function        userial_set_port
352**
353** Description     Configure UART port name
354**
355** Returns         0 : Success
356**                 Otherwise : Fail
357**
358*******************************************************************************/
359int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
360{
361    (void)strcpy_s(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, p_conf_value);
362
363    return 0;
364}
365