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Reapply rev 1.262 and add a comment about it.

This commit is contained in:
ad 2007-10-17 17:20:41 +00:00
parent b16ab0b2da
commit 6d904cb986
1 changed files with 6 additions and 4 deletions
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10
sys/dev/ic/com.c
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@ -1,4 +1,4 @@
/* $NetBSD: com.c,v 1.263 2007/10/08 16:50:45 ad Exp $ */
/* $NetBSD: com.c,v 1.264 2007/10/17 17:20:41 ad Exp $ */
/*-
* Copyright (c) 1998, 1999, 2004 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.263 2007/10/08 16:50:45 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.264 2007/10/17 17:20:41 ad Exp $");
#include "opt_com.h"
#include "opt_ddb.h"
@ -352,19 +352,21 @@ comprobe1(bus_space_tag_t iot, bus_space_handle_t ioh)
return com_probe_subr(&regs);
}
/*
* No locking in this routine; it is only called during attach,
* or with the port already locked.
*/
static void
com_enable_debugport(struct com_softc *sc)
{
/* Turn on line break interrupt, set carrier. */
mutex_spin_enter(&sc->sc_lock);
sc->sc_ier = IER_ERXRDY;
if (sc->sc_type == COM_TYPE_PXA2x0)
sc->sc_ier |= IER_EUART | IER_ERXTOUT;
CSR_WRITE_1(&sc->sc_regs, COM_REG_IER, sc->sc_ier);
SET(sc->sc_mcr, MCR_DTR | MCR_RTS);
CSR_WRITE_1(&sc->sc_regs, COM_REG_MCR, sc->sc_mcr);
mutex_spin_exit(&sc->sc_lock);
}
void