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