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no EFR on tl16c750, use AFE bit on MCR reg instead for flow control

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This commit is contained in:
jmcneill 2013-09-03 15:32:55 +00:00
parent acdab5428b
commit 6b4d5e4626
3 changed files with 22 additions and 8 deletions
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24
sys/dev/ic/com.c
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@ -1,4 +1,4 @@
/* $NetBSD: com.c,v 1.314 2013/09/01 04:58:15 kiyohara Exp $ */
/* $NetBSD: com.c,v 1.315 2013/09/03 15:32:55 jmcneill Exp $ */
/*-
* Copyright (c) 1998, 1999, 2004, 2008 The NetBSD Foundation, Inc.
@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.314 2013/09/01 04:58:15 kiyohara Exp $");
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.315 2013/09/03 15:32:55 jmcneill Exp $");
#include "opt_com.h"
#include "opt_ddb.h"
@ -505,7 +505,7 @@ com_attach_subr(struct com_softc *sc)
ISSET(iir2, IIR_64B_FIFO)) {
/* It is TL16C750. */
sc->sc_fifolen = 64;
SET(sc->sc_hwflags, COM_HW_FLOW);
SET(sc->sc_hwflags, COM_HW_AFE);
} else
CSR_WRITE_1(regsp, COM_REG_FIFO, fcr);
@ -1358,7 +1358,11 @@ comparam(struct tty *tp, struct termios *t)
sc->sc_mcr_dtr = MCR_DTR;
sc->sc_mcr_rts = MCR_RTS;
sc->sc_msr_cts = MSR_CTS;
sc->sc_efr = EFR_AUTORTS | EFR_AUTOCTS;
if (ISSET(sc->sc_hwflags, COM_HW_AFE)) {
SET(sc->sc_mcr, MCR_AFE);
} else {
sc->sc_efr = EFR_AUTORTS | EFR_AUTOCTS;
}
} else if (ISSET(t->c_cflag, MDMBUF)) {
/*
* For DTR/DCD flow control, make sure we don't toggle DTR for
@ -1367,7 +1371,11 @@ comparam(struct tty *tp, struct termios *t)
sc->sc_mcr_dtr = 0;
sc->sc_mcr_rts = MCR_DTR;
sc->sc_msr_cts = MSR_DCD;
sc->sc_efr = 0;
if (ISSET(sc->sc_hwflags, COM_HW_AFE)) {
CLR(sc->sc_mcr, MCR_AFE);
} else {
sc->sc_efr = 0;
}
} else {
/*
* If no flow control, then always set RTS. This will make
@ -1377,7 +1385,11 @@ comparam(struct tty *tp, struct termios *t)
sc->sc_mcr_dtr = MCR_DTR | MCR_RTS;
sc->sc_mcr_rts = 0;
sc->sc_msr_cts = 0;
sc->sc_efr = 0;
if (ISSET(sc->sc_hwflags, COM_HW_AFE)) {
CLR(sc->sc_mcr, MCR_AFE);
} else {
sc->sc_efr = 0;
}
if (ISSET(sc->sc_mcr, MCR_DTR))
SET(sc->sc_mcr, MCR_RTS);
else

3
sys/dev/ic/comreg.h
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@ -1,4 +1,4 @@
/* $NetBSD: comreg.h,v 1.20 2013/09/01 04:58:15 kiyohara Exp $ */
/* $NetBSD: comreg.h,v 1.21 2013/09/03 15:32:55 jmcneill Exp $ */
/*-
* Copyright (c) 1991 The Regents of the University of California.
@ -111,6 +111,7 @@
#define MCR_PRESCALE 0x80 /* 16650/16950: Baud rate prescaler select */
#define MCR_TCR_TLR 0x40 /* OMAP: enables access to the TCR & TLR regs */
#define MCR_XONENABLE 0x20 /* OMAP XON_EN */
#define MCR_AFE 0x20 /* tl16c750: Flow Control Enable */
#define MCR_LOOPBACK 0x10 /* Loop test: echos from TX to RX */
#define MCR_IENABLE 0x08 /* Out2: enables UART interrupts */
#define MCR_DRS 0x04 /* Out1: resets some internal modems */

3
sys/dev/ic/comvar.h
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@ -1,4 +1,4 @@
/* $NetBSD: comvar.h,v 1.76 2013/09/01 04:51:24 kiyohara Exp $ */
/* $NetBSD: comvar.h,v 1.77 2013/09/03 15:32:55 jmcneill Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
@ -69,6 +69,7 @@ int com_is_console(bus_space_tag_t, bus_addr_t, bus_space_handle_t *);
#define COM_HW_KGDB 0x80
#define COM_HW_TXFIFO_DISABLE 0x100
#define COM_HW_NO_TXPRELOAD 0x200
#define COM_HW_AFE 0x400
/* Buffer size for character buffer */
#ifndef COM_RING_SIZE