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
199    vnd_userial.fd = -1;
200
201    if (!userial_to_tcio_baud(p_cfg->baud, &baud))
202    {
203        return -1;
204    }
205
206    if(p_cfg->fmt & USERIAL_DATABITS_8)
207        data_bits = CS8;
208    else if(p_cfg->fmt & USERIAL_DATABITS_7)
209        data_bits = CS7;
210    else if(p_cfg->fmt & USERIAL_DATABITS_6)
211        data_bits = CS6;
212    else if(p_cfg->fmt & USERIAL_DATABITS_5)
213        data_bits = CS5;
214    else
215    {
216        ALOGE("userial vendor open: unsupported data bits");
217        return -1;
218    }
219
220    if(p_cfg->fmt & USERIAL_PARITY_NONE)
221        parity = 0;
222    else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
223        parity = PARENB;
224    else if(p_cfg->fmt & USERIAL_PARITY_ODD)
225        parity = (PARENB | PARODD);
226    else
227    {
228        ALOGE("userial vendor open: unsupported parity bit mode");
229        return -1;
230    }
231
232    if(p_cfg->fmt & USERIAL_STOPBITS_1)
233        stop_bits = 0;
234    else if(p_cfg->fmt & USERIAL_STOPBITS_2)
235        stop_bits = CSTOPB;
236    else
237    {
238        ALOGE("userial vendor open: unsupported stop bits");
239        return -1;
240    }
241
242    ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
243
244    if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR)) == -1)
245    {
246        ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
247        return -1;
248    }
249
250    tcflush(vnd_userial.fd, TCIOFLUSH);
251
252    tcgetattr(vnd_userial.fd, &vnd_userial.termios);
253    cfmakeraw(&vnd_userial.termios);
254    vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
255    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
256    tcflush(vnd_userial.fd, TCIOFLUSH);
257
258    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
259    tcflush(vnd_userial.fd, TCIOFLUSH);
260    tcflush(vnd_userial.fd, TCIOFLUSH);
261
262    /* set input/output baudrate */
263    cfsetospeed(&vnd_userial.termios, baud);
264    cfsetispeed(&vnd_userial.termios, baud);
265    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
266
267#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
268    userial_ioctl_init_bt_wake(vnd_userial.fd);
269#endif
270
271    ALOGI("device fd = %d open", vnd_userial.fd);
272
273    return vnd_userial.fd;
274}
275
276/*******************************************************************************
277**
278** Function        userial_vendor_close
279**
280** Description     Conduct vendor-specific close work
281**
282** Returns         None
283**
284*******************************************************************************/
285void userial_vendor_close(void)
286{
287    int result;
288
289    if (vnd_userial.fd == -1)
290        return;
291
292#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
293    /* de-assert bt_wake BEFORE closing port */
294    ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
295#endif
296
297    ALOGI("device fd = %d close", vnd_userial.fd);
298    // flush Tx before close to make sure no chars in buffer
299    tcflush(vnd_userial.fd, TCIOFLUSH);
300    if ((result = close(vnd_userial.fd)) < 0)
301        ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
302
303    vnd_userial.fd = -1;
304}
305
306/*******************************************************************************
307**
308** Function        userial_vendor_set_baud
309**
310** Description     Set new baud rate
311**
312** Returns         None
313**
314*******************************************************************************/
315void userial_vendor_set_baud(uint8_t userial_baud)
316{
317    uint32_t tcio_baud;
318
319    userial_to_tcio_baud(userial_baud, &tcio_baud);
320
321    cfsetospeed(&vnd_userial.termios, tcio_baud);
322    cfsetispeed(&vnd_userial.termios, tcio_baud);
323    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
324}
325
326/*******************************************************************************
327**
328** Function        userial_vendor_ioctl
329**
330** Description     ioctl inteface
331**
332** Returns         None
333**
334*******************************************************************************/
335void userial_vendor_ioctl(userial_vendor_ioctl_op_t op, void *p_data)
336{
337    switch(op)
338    {
339#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
340        case USERIAL_OP_ASSERT_BT_WAKE:
341            VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
342            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
343            break;
344
345        case USERIAL_OP_DEASSERT_BT_WAKE:
346            VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
347            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
348            break;
349
350        case USERIAL_OP_GET_BT_WAKE_STATE:
351            ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
352            break;
353#endif  //  (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
354
355        default:
356            break;
357    }
358}
359
360/*******************************************************************************
361**
362** Function        userial_set_port
363**
364** Description     Configure UART port name
365**
366** Returns         0 : Success
367**                 Otherwise : Fail
368**
369*******************************************************************************/
370int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
371{
372    strcpy(vnd_userial.port_name, p_conf_value);
373
374    return 0;
375}
376
377