Fix the compilation for Android with Qt 5.

1) The termios struct is basically copied and pasted from the documentation:
http://linux.die.net/man/3/termios

Since, it is just an interface without complicated methods, it is not
copyrightable, so it is safe enough.

2) This is also the same situation with the two defines we need for the kernel
interface. They are just interface numbers, and not something that
copyrightable. This has also been double checked and discussed with Lars in
email.

3) The ::tcdrain convenience method cannot be used on Android, so the fallback
"raw" ioctl syscall is used with the relevant parameters, e.g. TCSBREAK.

http://linux.die.net/man/3/tcdrain

5) cfsetspeed seems to be a BSD 4.4 extension based on the termios(3) man page:

http://linux.die.net/man/3/termios

"cfsetspeed() is a 4.4BSD extension.  It takes the same arguments as
cfsetispeed(), and sets both input and output speed."

... hence this is replaced with separate calls for input and output without a
specific Android "ifdef" in the code. It is actually also more consistent with
the setcfispeed and setcfospeed just right above that snippet.

Task-number: QTBUG-33139

Change-Id: If0abb8cec9e900fa2b6fc24df938cb778a344d55
Reviewed-by: Sergey Belyashov <Sergey.Belyashov@gmail.com>
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>

2 files changed, 32 insertions, 2 deletions

diff --git a/src/serialport/qserialport_unix.cpp b/src/serialport/qserialport_unix.cpp
index 448701b..0176e5f 100644
--- a/src/serialport/qserialport_unix.cpp
+++ b/src/serialport/qserialport_unix.cpp
@@ -324,7 +324,12 @@ bool QSerialPortPrivate::setRequestToSend(bool set)
 
 bool QSerialPortPrivate::flush()
 {
-    return writeNotification() && (::tcdrain(descriptor) != -1);
+    return writeNotification()
+#ifndef Q_OS_ANDROID
+            && (::tcdrain(descriptor) != -1);
+#else
+            && (::ioctl(descriptor, TCSBRK, 1) != -1);
+#endif
 }
 
 bool QSerialPortPrivate::clear(QSerialPort::Directions dir)
@@ -515,7 +520,7 @@ bool QSerialPortPrivate::setBaudRate(qint32 baudRate, QSerialPort::Directions di
                 if (currentSerialInfo.custom_divisor == 0)
                     currentSerialInfo.custom_divisor = 1;
                 // for custom mode needed prepare to set B38400 baud rate
-                ret = (::cfsetspeed(&currentTermios, B38400) != -1);
+                ret = (::cfsetispeed(&currentTermios, B38400) != -1) && (::cfsetospeed(&currentTermios, B38400) != -1);
             } else {
                 ret = false;
             }
diff --git a/src/serialport/qserialport_unix_p.h b/src/serialport/qserialport_unix_p.h
index d75bc90..0c723a9 100644
--- a/src/serialport/qserialport_unix_p.h
+++ b/src/serialport/qserialport_unix_p.h
@@ -47,9 +47,34 @@
 
 #include <limits.h>
 #include <termios.h>
+#ifndef Q_OS_ANDROID
 #ifdef Q_OS_LINUX
 #  include <linux/serial.h>
 #endif
+#else
+struct serial_struct {
+    int     type;
+    int     line;
+    unsigned int    port;
+    int     irq;
+    int     flags;
+    int     xmit_fifo_size;
+    int     custom_divisor;
+    int     baud_base;
+    unsigned short  close_delay;
+    char    io_type;
+    char    reserved_char[1];
+    int     hub6;
+    unsigned short  closing_wait;
+    unsigned short  closing_wait2;
+    unsigned char   *iomem_base;
+    unsigned short  iomem_reg_shift;
+    unsigned int    port_high;
+    unsigned long   iomap_base;
+};
+#define ASYNC_SPD_CUST  0x0030
+#define ASYNC_SPD_MASK  0x1030
+#endif
 
 QT_BEGIN_NAMESPACE