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Code Issues Releases Wiki Activity

Multiple unrelated changes

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- replace the hand written serial input flush routine with the termios one.
- serialport_discard_read isn't necessary anymore - it just wrapped
  sp_flush_incoming with no extra value.
- serialport_read and serialport_write would misbehave if read or write
  didn't process everything in one go.
- sp_flush_incoming should be #define'd out for FAKE_COMMUNICATION like
  serialport_discard_read was

Corresponding to flashrom svn r831.

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Sean Nelson <audiohacked@gmail.com>
This commit is contained in:
Patrick Georgi
2010-01-06 19:09:40 +00:00
committed by Patrick Georgi
parent efa151eb10
commit 3b6237dbce
3 changed files with 11 additions and 34 deletions
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38
serial.c
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@ -129,16 +129,7 @@ int sp_openserport(char *dev, unsigned int baud)
void sp_flush_incoming(void)
{
int i;
for (i=0;i<100;i++) { /* In case the device doesnt do EAGAIN, just read 0 */
unsigned char flush[16];
ssize_t rv;
rv = read(sp_fd, flush, sizeof(flush));
if ((rv == -1) && (errno == EAGAIN))
break;
if (rv == -1)
sp_die("flush read");
}
tcflush(sp_fd, TCIFLUSH);
return;
}
@ -152,12 +143,14 @@ int serialport_write(unsigned char *buf, unsigned int writecnt)
{
int tmp = 0;
while (tmp != writecnt) {
tmp = write(sp_fd, buf + tmp, writecnt - tmp);
while (writecnt > 0) {
tmp = write(sp_fd, buf, writecnt);
if (tmp == -1)
return 1;
if (!tmp)
printf_debug("Empty write\n");
writecnt -= tmp;
buf += tmp;
}
return 0;
@ -167,28 +160,15 @@ int serialport_read(unsigned char *buf, unsigned int readcnt)
{
int tmp = 0;
while (tmp != readcnt) {
tmp = read(sp_fd, buf + tmp, readcnt - tmp);
while (readcnt > 0) {
tmp = read(sp_fd, buf, readcnt);
if (tmp == -1)
return 1;
if (!tmp)
printf_debug("Empty read\n");
readcnt -= tmp;
buf += tmp;
}
return 0;
}
int serialport_discard_read(void)
{
int flags;
printf_debug("%s\n", __func__);
flags = fcntl(sp_fd, F_GETFL);
flags |= O_NONBLOCK;
fcntl(sp_fd, F_SETFL, flags);
sp_flush_incoming();
flags &= ~O_NONBLOCK;
fcntl(sp_fd, F_SETFL, flags);
return 0;
}