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 stop_bits;
199
200    vnd_userial.fd = -1;
201
202    if (!userial_to_tcio_baud(p_cfg->baud, &baud)) {
203        return -1;
204    }
205
206
207    if (p_cfg->fmt & USERIAL_STOPBITS_1)
208        stop_bits = 0;
209    else if (p_cfg->fmt & USERIAL_STOPBITS_2)
210        stop_bits = CSTOPB;
211
212    HILOGI("userial vendor open: opening %s", vnd_userial.port_name);
213
214    if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1) {
215        return -1;
216    }
217
218    tcflush(vnd_userial.fd, TCIOFLUSH);
219
220    tcgetattr(vnd_userial.fd, &vnd_userial.termios);
221    cfmakeraw(&vnd_userial.termios);
222    vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
223    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
224    tcflush(vnd_userial.fd, TCIOFLUSH);
225
226    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
227    tcflush(vnd_userial.fd, TCIOFLUSH);
228    tcflush(vnd_userial.fd, TCIOFLUSH);
229
230    /* set input/output baudrate */
231    cfsetospeed(&vnd_userial.termios, baud);
232    cfsetispeed(&vnd_userial.termios, baud);
233    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
234
235#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
236    userial_ioctl_init_bt_wake(vnd_userial.fd);
237#endif
238
239    HILOGI("device fd = %d open", vnd_userial.fd);
240    return vnd_userial.fd;
241}
242
243/*******************************************************************************
244**
245** Function        userial_vendor_close
246**
247** Description     Conduct vendor-specific close work
248**
249** Returns         None
250**
251*******************************************************************************/
252void userial_vendor_close(void)
253{
254    int result;
255
256    if (vnd_userial.fd == -1) {
257        return;
258    }
259
260#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
261    /* de-assert bt_wake BEFORE closing port */
262    ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
263#endif
264
265    HILOGI("device fd = %d close", vnd_userial.fd);
266    // flush Tx before close to make sure no chars in buffer
267    tcflush(vnd_userial.fd, TCIOFLUSH);
268    if ((result = close(vnd_userial.fd)) < 0) {
269        HILOGE("close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
270    }
271
272    vnd_userial.fd = -1;
273}
274
275/*******************************************************************************
276**
277** Function        userial_vendor_set_baud
278**
279** Description     Set new baud rate
280**
281** Returns         None
282**
283*******************************************************************************/
284void userial_vendor_set_baud(uint8_t userial_baud)
285{
286    uint32_t tcio_baud;
287
288    if (USERIAL_VENDOR_SET_BAUD_DELAY_US > 0) {
289        usleep(USERIAL_VENDOR_SET_BAUD_DELAY_US);
290    }
291
292    userial_to_tcio_baud(userial_baud, &tcio_baud);
293
294    cfsetospeed(&vnd_userial.termios, tcio_baud);
295    cfsetispeed(&vnd_userial.termios, tcio_baud);
296    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
297}
298
299/*******************************************************************************
300**
301** Function        userial_vendor_ioctl
302**
303** Description     ioctl inteface
304**
305** Returns         None
306**
307*******************************************************************************/
308void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
309{
310    switch (op) {
311#if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE)
312        case USERIAL_OP_ASSERT_BT_WAKE:
313            VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
314            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
315            break;
316
317        case USERIAL_OP_DEASSERT_BT_WAKE:
318            VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
319            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
320            break;
321
322        case USERIAL_OP_GET_BT_WAKE_STATE:
323            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
324            break;
325#endif //  (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
326
327        default:
328            break;
329    }
330}
331
332/*******************************************************************************
333**
334** Function        userial_set_port
335**
336** Description     Configure UART port name
337**
338** Returns         0 : Success
339**                 Otherwise : Fail
340**
341*******************************************************************************/
342int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
343{
344    (void)strcpy_s(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, p_conf_value);
345
346    return 0;
347}
348