no need to cache the physical address of the active source in the device map; the...
[deb_libcec.git] / src / lib / platform / posix / serialport.cpp
1 /*
2 * This file is part of the libCEC(R) library.
3 *
4 * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited. All rights reserved.
5 * libCEC(R) is an original work, containing original code.
6 *
7 * libCEC(R) is a trademark of Pulse-Eight Limited.
8 *
9 * This program is dual-licensed; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 *
23 *
24 * Alternatively, you can license this library under a commercial license,
25 * please contact Pulse-Eight Licensing for more information.
26 *
27 * For more information contact:
28 * Pulse-Eight Licensing <license@pulse-eight.com>
29 * http://www.pulse-eight.com/
30 * http://www.pulse-eight.net/
31 */
32
33 #include "env.h"
34 #include <stdio.h>
35 #include <fcntl.h>
36 #include "lib/platform/sockets/serialport.h"
37 #include "lib/platform/util/baudrate.h"
38 #include "lib/platform/posix/os-socket.h"
39
40 #if defined(__APPLE__) || defined(__FreeBSD__)
41 #ifndef XCASE
42 #define XCASE 0
43 #endif
44 #ifndef OLCUC
45 #define OLCUC 0
46 #endif
47 #ifndef IUCLC
48 #define IUCLC 0
49 #endif
50 #else
51 #include <lockdev.h>
52 #endif
53
54 using namespace std;
55 using namespace PLATFORM;
56
57 inline bool RemoveLock(const char *strDeviceName)
58 {
59 #if !defined(__APPLE__) && !defined(__FreeBSD__)
60 return dev_unlock(strDeviceName, 0) == 0;
61 #else
62 void *tmp = (void*)strDeviceName; // silence unused warning
63 tmp = NULL;
64 return true;
65 #endif
66 }
67
68 void CSerialSocket::Close(void)
69 {
70 if (IsOpen())
71 {
72 SocketClose(m_socket);
73 RemoveLock(m_strName.c_str());
74 }
75 }
76
77 void CSerialSocket::Shutdown(void)
78 {
79 if (IsOpen())
80 {
81 SocketClose(m_socket);
82 RemoveLock(m_strName.c_str());
83 }
84 }
85
86 ssize_t CSerialSocket::Write(void* data, size_t len)
87 {
88 return IsOpen() ? SocketWrite(m_socket, &m_iError, data, len) : -1;
89 }
90
91 ssize_t CSerialSocket::Read(void* data, size_t len, uint64_t iTimeoutMs /* = 0 */)
92 {
93 return IsOpen() ? SocketRead(m_socket, &m_iError, data, len, iTimeoutMs) : -1;
94 }
95
96 //setting all this stuff up is a pain in the ass
97 bool CSerialSocket::Open(uint64_t iTimeoutMs /* = 0 */)
98 {
99 iTimeoutMs = 0; if (!iTimeoutMs){} // silence unused warning
100 if (IsOpen())
101 {
102 m_iError = EINVAL;
103 return false;
104 }
105
106 if (m_iDatabits != SERIAL_DATA_BITS_FIVE && m_iDatabits != SERIAL_DATA_BITS_SIX &&
107 m_iDatabits != SERIAL_DATA_BITS_SEVEN && m_iDatabits != SERIAL_DATA_BITS_EIGHT)
108 {
109 m_strError = "Databits has to be between 5 and 8";
110 m_iError = EINVAL;
111 return false;
112 }
113
114 if (m_iStopbits != SERIAL_STOP_BITS_ONE && m_iStopbits != SERIAL_STOP_BITS_TWO)
115 {
116 m_strError = "Stopbits has to be 1 or 2";
117 m_iError = EINVAL;
118 return false;
119 }
120
121 if (m_iParity != SERIAL_PARITY_NONE && m_iParity != SERIAL_PARITY_EVEN && m_iParity != SERIAL_PARITY_ODD)
122 {
123 m_strError = "Parity has to be none, even or odd";
124 m_iError = EINVAL;
125 return false;
126 }
127
128 #if !defined(__APPLE__) && !defined(__FreeBSD__)
129 if (dev_lock(m_strName.c_str()) != 0)
130 {
131 m_strError = "Couldn't lock the serial port";
132 m_iError = EBUSY;
133 return false;
134 }
135 #endif
136
137 m_socket = open(m_strName.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
138
139 if (m_socket == INVALID_SERIAL_SOCKET_VALUE)
140 {
141 m_strError = strerror(errno);
142 RemoveLock(m_strName.c_str());
143 return false;
144 }
145
146 SocketSetBlocking(m_socket, false);
147
148 if (!SetBaudRate(m_iBaudrate))
149 return false;
150
151 m_options.c_cflag |= (CLOCAL | CREAD);
152 m_options.c_cflag &= ~HUPCL;
153
154 m_options.c_cflag &= ~CSIZE;
155 if (m_iDatabits == SERIAL_DATA_BITS_FIVE) m_options.c_cflag |= CS5;
156 if (m_iDatabits == SERIAL_DATA_BITS_SIX) m_options.c_cflag |= CS6;
157 if (m_iDatabits == SERIAL_DATA_BITS_SEVEN) m_options.c_cflag |= CS7;
158 if (m_iDatabits == SERIAL_DATA_BITS_EIGHT) m_options.c_cflag |= CS8;
159
160 m_options.c_cflag &= ~PARENB;
161 if (m_iParity == SERIAL_PARITY_EVEN || m_iParity == SERIAL_PARITY_ODD)
162 m_options.c_cflag |= PARENB;
163 if (m_iParity == SERIAL_PARITY_ODD)
164 m_options.c_cflag |= PARODD;
165
166 #ifdef CRTSCTS
167 m_options.c_cflag &= ~CRTSCTS;
168 #elif defined(CNEW_RTSCTS)
169 m_options.c_cflag &= ~CNEW_RTSCTS;
170 #endif
171
172 if (m_iStopbits == SERIAL_STOP_BITS_ONE) m_options.c_cflag &= ~CSTOPB;
173 else m_options.c_cflag |= CSTOPB;
174
175 //I guessed a little here
176 m_options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG | XCASE | ECHOK | ECHONL | ECHOCTL | ECHOPRT | ECHOKE | TOSTOP);
177
178 if (m_iParity == SERIAL_PARITY_NONE)
179 m_options.c_iflag &= ~INPCK;
180 else
181 m_options.c_iflag |= INPCK | ISTRIP;
182
183 m_options.c_iflag &= ~(IXON | IXOFF | IXANY | BRKINT | INLCR | IGNCR | ICRNL | IUCLC | IMAXBEL);
184 m_options.c_oflag &= ~(OPOST | ONLCR | OCRNL);
185
186 if (tcsetattr(m_socket, TCSANOW, &m_options) != 0)
187 {
188 m_strError = strerror(errno);
189 RemoveLock(m_strName.c_str());
190 return false;
191 }
192
193 SocketSetBlocking(m_socket, true);
194 m_bIsOpen = true;
195
196 return true;
197 }
198
199 bool CSerialSocket::SetBaudRate(uint32_t baudrate)
200 {
201 int rate = IntToBaudrate(baudrate);
202 if (rate == -1)
203 {
204 char buff[255];
205 sprintf(buff, "%i is not a valid baudrate", baudrate);
206 m_strError = buff;
207 return false;
208 }
209
210 //get the current port attributes
211 if (tcgetattr(m_socket, &m_options) != 0)
212 {
213 m_strError = strerror(errno);
214 return false;
215 }
216
217 if (cfsetispeed(&m_options, rate) != 0)
218 {
219 m_strError = strerror(errno);
220 return false;
221 }
222
223 if (cfsetospeed(&m_options, rate) != 0)
224 {
225 m_strError = strerror(errno);
226 return false;
227 }
228
229 return true;
230 }