From 742ec650e9b63ea61891455bb6f76bac37025c78 Mon Sep 17 00:00:00 2001 From: Marko Kohtala Date: Fri, 6 Jan 2006 00:19:44 -0800 Subject: [PATCH] parport: phase fixes Did not move the parport interface properly into IEEE1284_PH_REV_IDLE phase at end of data due to comparing bytes with nibbles. Internal phase IEEE1284_PH_HBUSY_DNA became unused, so remove it. Signed-off-by: Marko Kohtala Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/media/video/cpia_pp.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-) (limited to 'drivers/media/video') diff --git a/drivers/media/video/cpia_pp.c b/drivers/media/video/cpia_pp.c index ddf184f95d8..6861d408f1b 100644 --- a/drivers/media/video/cpia_pp.c +++ b/drivers/media/video/cpia_pp.c @@ -170,16 +170,9 @@ static size_t cpia_read_nibble (struct parport *port, /* Does the error line indicate end of data? */ if (((i /*& 1*/) == 0) && (parport_read_status(port) & PARPORT_STATUS_ERROR)) { - port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DNA; - DBG("%s: No more nibble data (%d bytes)\n", - port->name, i/2); - - /* Go to reverse idle phase. */ - parport_frob_control (port, - PARPORT_CONTROL_AUTOFD, - PARPORT_CONTROL_AUTOFD); - port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; - break; + DBG("%s: No more nibble data (%d bytes)\n", + port->name, i/2); + goto end_of_data; } /* Event 7: Set nAutoFd low. */ @@ -227,18 +220,21 @@ static size_t cpia_read_nibble (struct parport *port, byte = nibble; } - i /= 2; /* i is now in bytes */ - if (i == len) { /* Read the last nibble without checking data avail. */ - port = port->physport; - if (parport_read_status (port) & PARPORT_STATUS_ERROR) - port->ieee1284.phase = IEEE1284_PH_HBUSY_DNA; + if (parport_read_status (port) & PARPORT_STATUS_ERROR) { + end_of_data: + /* Go to reverse idle phase. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; + } else - port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; + port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; } - return i; + return i/2; } /* CPiA nonstandard "Nibble Stream" mode (2 nibbles per cycle, instead of 1) -- cgit v1.2.3-70-g09d2