| sio.c (98691) | sio.c (102542) |
|---|---|
| 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * | 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * |
| 33 * $FreeBSD: head/sys/dev/sio/sio.c 98691 2002-06-23 18:57:53Z n_hibma $ | 33 * $FreeBSD: head/sys/dev/sio/sio.c 102542 2002-08-28 22:25:41Z phk $ |
| 34 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 35 * from: i386/isa sio.c,v 1.234 36 */ 37 38#include "opt_comconsole.h" 39#include "opt_compat.h" 40#include "opt_ddb.h" 41#include "opt_sio.h" --- 1186 unchanged lines hidden (view full) --- 1228 error = comparam(tp, &tp->t_termios); 1229 --com->wopeners; 1230 if (error != 0) 1231 goto out; 1232 /* 1233 * XXX we should goto open_top if comparam() slept. 1234 */ 1235 if (com->hasfifo) { | 34 * from: @(#)com.c 7.5 (Berkeley) 5/16/91 35 * from: i386/isa sio.c,v 1.234 36 */ 37 38#include "opt_comconsole.h" 39#include "opt_compat.h" 40#include "opt_ddb.h" 41#include "opt_sio.h" --- 1186 unchanged lines hidden (view full) --- 1228 error = comparam(tp, &tp->t_termios); 1229 --com->wopeners; 1230 if (error != 0) 1231 goto out; 1232 /* 1233 * XXX we should goto open_top if comparam() slept. 1234 */ 1235 if (com->hasfifo) { |
| 1236 int i; |
|
| 1236 /* 1237 * (Re)enable and drain fifos. 1238 * 1239 * Certain SMC chips cause problems if the fifos 1240 * are enabled while input is ready. Turn off the 1241 * fifo if necessary to clear the input. We test 1242 * the input ready bit after enabling the fifos 1243 * since we've already enabled them in comparam() 1244 * and to handle races between enabling and fresh 1245 * input. 1246 */ | 1237 /* 1238 * (Re)enable and drain fifos. 1239 * 1240 * Certain SMC chips cause problems if the fifos 1241 * are enabled while input is ready. Turn off the 1242 * fifo if necessary to clear the input. We test 1243 * the input ready bit after enabling the fifos 1244 * since we've already enabled them in comparam() 1245 * and to handle races between enabling and fresh 1246 * input. 1247 */ |
| 1247 while (TRUE) { | 1248 for (i = 0; i < 500; i++) { |
| 1248 sio_setreg(com, com_fifo, 1249 FIFO_RCV_RST | FIFO_XMT_RST 1250 | com->fifo_image); 1251 /* 1252 * XXX the delays are for superstitious 1253 * historical reasons. It must be less than 1254 * the character time at the maximum 1255 * supported speed (87 usec at 115200 bps --- 5 unchanged lines hidden (view full) --- 1261 */ 1262 DELAY(50); 1263 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1264 break; 1265 sio_setreg(com, com_fifo, 0); 1266 DELAY(50); 1267 (void) inb(com->data_port); 1268 } | 1249 sio_setreg(com, com_fifo, 1250 FIFO_RCV_RST | FIFO_XMT_RST 1251 | com->fifo_image); 1252 /* 1253 * XXX the delays are for superstitious 1254 * historical reasons. It must be less than 1255 * the character time at the maximum 1256 * supported speed (87 usec at 115200 bps --- 5 unchanged lines hidden (view full) --- 1262 */ 1263 DELAY(50); 1264 if (!(inb(com->line_status_port) & LSR_RXRDY)) 1265 break; 1266 sio_setreg(com, com_fifo, 0); 1267 DELAY(50); 1268 (void) inb(com->data_port); 1269 } |
| 1270 if (i == 500) { 1271 error = EIO; 1272 goto out; 1273 } |
|
| 1269 } 1270 1271 mtx_lock_spin(&sio_lock); 1272 (void) inb(com->line_status_port); 1273 (void) inb(com->data_port); 1274 com->prev_modem_status = com->last_modem_status 1275 = inb(com->modem_status_port); 1276 if (COM_IIR_TXRDYBUG(com->flags)) { --- 1986 unchanged lines hidden --- | 1274 } 1275 1276 mtx_lock_spin(&sio_lock); 1277 (void) inb(com->line_status_port); 1278 (void) inb(com->data_port); 1279 com->prev_modem_status = com->last_modem_status 1280 = inb(com->modem_status_port); 1281 if (COM_IIR_TXRDYBUG(com->flags)) { --- 1986 unchanged lines hidden --- |