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Detect various supersets of 16550A based on fifo depth.

Browse source 
PR:		i386/3523
Reviewed by:	phk
Submitted by:	vak@cronyx.ru
This commit is contained in:
Poul-Henning Kamp 1997-05-18 20:53:52 +00:00
parent e0da1f1006
commit 8463cf03a9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=25897
3 changed files with 117 additions and 12 deletions
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43
sys/dev/sio/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.163 1997/04/18 18:28:09 bde Exp $
* $Id: sio.c,v 1.164 1997/04/26 11:46:06 peter Exp $
*/
#include "opt_comconsole.h"
@ -881,12 +881,47 @@ sioattach(isdp)
printf(" 16550?");
break;
case FIFO_RX_HIGH:
printf(" 16550A");
if (COM_NOFIFO(isdp)) {
printf(" fifo disabled");
printf(" 16550A fifo disabled");
} else {
/* Detect the fifo size. */
int i, n;
/* Enable and reset the FIFO. */
outb (iobase+com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST);
/* Set the loopback mode, 57600 baud. */
outb (iobase+com_cfcr, CFCR_DLAB);
outb (iobase+com_dlbh, 0);
outb (iobase+com_dlbl, 2);
outb (iobase+com_cfcr, CFCR_8BITS);
outb (iobase+com_mcr, MCR_LOOPBACK);
inb (iobase+com_lsr);
/* Put data into transmit FIFO and wait until overrun. */
for (i=n=0; i<20000; ++i) {
unsigned char lsr = inb (iobase+com_lsr);
if (lsr & LSR_OE)
break;
if (lsr & LSR_TXRDY) {
outb (iobase+com_data, 0x5A);
++n;
}
}
outb (iobase+com_mcr, 0);
outb (iobase+com_fifo, 0);
com->hasfifo = TRUE;
com->tx_fifo_size = 16;
if (n > 40) {
com->tx_fifo_size = 64;
printf(" 16750");
} else if (n > 24) {
com->tx_fifo_size = 32;
printf(" 16650");
} else {
com->tx_fifo_size = 16;
printf(" 16550A");
}
#ifdef COM_ESP
for (espp = likely_esp_ports; *espp != 0; espp++)
if (espattach(isdp, com, *espp)) {

43
sys/i386/isa/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.163 1997/04/18 18:28:09 bde Exp $
* $Id: sio.c,v 1.164 1997/04/26 11:46:06 peter Exp $
*/
#include "opt_comconsole.h"
@ -881,12 +881,47 @@ sioattach(isdp)
printf(" 16550?");
break;
case FIFO_RX_HIGH:
printf(" 16550A");
if (COM_NOFIFO(isdp)) {
printf(" fifo disabled");
printf(" 16550A fifo disabled");
} else {
/* Detect the fifo size. */
int i, n;
/* Enable and reset the FIFO. */
outb (iobase+com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST);
/* Set the loopback mode, 57600 baud. */
outb (iobase+com_cfcr, CFCR_DLAB);
outb (iobase+com_dlbh, 0);
outb (iobase+com_dlbl, 2);
outb (iobase+com_cfcr, CFCR_8BITS);
outb (iobase+com_mcr, MCR_LOOPBACK);
inb (iobase+com_lsr);
/* Put data into transmit FIFO and wait until overrun. */
for (i=n=0; i<20000; ++i) {
unsigned char lsr = inb (iobase+com_lsr);
if (lsr & LSR_OE)
break;
if (lsr & LSR_TXRDY) {
outb (iobase+com_data, 0x5A);
++n;
}
}
outb (iobase+com_mcr, 0);
outb (iobase+com_fifo, 0);
com->hasfifo = TRUE;
com->tx_fifo_size = 16;
if (n > 40) {
com->tx_fifo_size = 64;
printf(" 16750");
} else if (n > 24) {
com->tx_fifo_size = 32;
printf(" 16650");
} else {
com->tx_fifo_size = 16;
printf(" 16550A");
}
#ifdef COM_ESP
for (espp = likely_esp_ports; *espp != 0; espp++)
if (espattach(isdp, com, *espp)) {

43
sys/isa/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.163 1997/04/18 18:28:09 bde Exp $
* $Id: sio.c,v 1.164 1997/04/26 11:46:06 peter Exp $
*/
#include "opt_comconsole.h"
@ -881,12 +881,47 @@ sioattach(isdp)
printf(" 16550?");
break;
case FIFO_RX_HIGH:
printf(" 16550A");
if (COM_NOFIFO(isdp)) {
printf(" fifo disabled");
printf(" 16550A fifo disabled");
} else {
/* Detect the fifo size. */
int i, n;
/* Enable and reset the FIFO. */
outb (iobase+com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST);
/* Set the loopback mode, 57600 baud. */
outb (iobase+com_cfcr, CFCR_DLAB);
outb (iobase+com_dlbh, 0);
outb (iobase+com_dlbl, 2);
outb (iobase+com_cfcr, CFCR_8BITS);
outb (iobase+com_mcr, MCR_LOOPBACK);
inb (iobase+com_lsr);
/* Put data into transmit FIFO and wait until overrun. */
for (i=n=0; i<20000; ++i) {
unsigned char lsr = inb (iobase+com_lsr);
if (lsr & LSR_OE)
break;
if (lsr & LSR_TXRDY) {
outb (iobase+com_data, 0x5A);
++n;
}
}
outb (iobase+com_mcr, 0);
outb (iobase+com_fifo, 0);
com->hasfifo = TRUE;
com->tx_fifo_size = 16;
if (n > 40) {
com->tx_fifo_size = 64;
printf(" 16750");
} else if (n > 24) {
com->tx_fifo_size = 32;
printf(" 16650");
} else {
com->tx_fifo_size = 16;
printf(" 16550A");
}
#ifdef COM_ESP
for (espp = likely_esp_ports; *espp != 0; espp++)
if (espattach(isdp, com, *espp)) {