aboutsummaryrefslogtreecommitdiff
path: root/vl.c
diff options
context:
space:
mode:
authoraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-08-22 08:57:09 +0000
committeraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-08-22 08:57:09 +0000
commit563e3c6e6e47536bdaad277ec545e27ee0594c41 (patch)
tree0ee3ec04bf0a204747c2d86691f3bc96f5066959 /vl.c
parentf34af52c53a58ae8ddf238609359198fdc6bb562 (diff)
Parallel Port Direction Fix
The direction bit in the control register should not be directly set using PPWCONTROL. The kernel gives the following debug message. parport0 (ppdev0): use data_reverse for this! More over setting the data pins to forward mode does not work, perhaps a bug in the Linux PP driver. The right way to do this is to use PPDATADIR to set the direction. The patch checks if the user is toggling the direction bit, and invokes PPDATADIR to do the job. Signed-off-by: Vijay Kumar B <vijaykumar@bravegnu.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5063 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'vl.c')
-rw-r--r--vl.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/vl.c b/vl.c
index ac63b64069..7ca8420f04 100644
--- a/vl.c
+++ b/vl.c
@@ -2835,6 +2835,10 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
+ case CHR_IOCTL_PP_DATA_DIR:
+ if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
+ return -ENOTSUP;
+ break;
case CHR_IOCTL_PP_EPP_READ_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;