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author | kato <kato@FreeBSD.org> | 1997-01-30 10:48:06 +0000 |
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committer | kato <kato@FreeBSD.org> | 1997-01-30 10:48:06 +0000 |
commit | 4dbb7c3002120b130178bd1864f70b201c5c93e6 (patch) | |
tree | 86f50377235432e6c03f72115bf585babd1ee13a /sys/pc98/cbus/sio.c | |
parent | 297e5886fb6e660ba27c9ca49b79844043977c20 (diff) | |
download | FreeBSD-src-4dbb7c3002120b130178bd1864f70b201c5c93e6.zip FreeBSD-src-4dbb7c3002120b130178bd1864f70b201c5c93e6.tar.gz |
Synchronize with sys/i386/isa/sio.c revision 1.157.
Diffstat (limited to 'sys/pc98/cbus/sio.c')
-rw-r--r-- | sys/pc98/cbus/sio.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/sys/pc98/cbus/sio.c b/sys/pc98/cbus/sio.c index 3b3e647..1e2adce 100644 --- a/sys/pc98/cbus/sio.c +++ b/sys/pc98/cbus/sio.c @@ -1253,14 +1253,15 @@ sioattach(isdp) } #ifdef COM_ESP if (com->esp) { - outb(iobase + com_fifo, - FIFO_DMA_MODE | FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST - | FIFO_RX_MEDH); - - /* Set 16550 compatibility mode. */ + /* + * Set 16550 compatibility mode. + * We don't use the ESP_MODE_SCALE bit to increase the + * fifo trigger levels because we can't handle large + * bursts of input. + * XXX flow control should be set in comparam(), not here. + */ outb(com->esp_port + ESP_CMD1, ESP_SETMODE); - outb(com->esp_port + ESP_CMD2, - ESP_MODE_SCALE | ESP_MODE_RTS | ESP_MODE_FIFO); + outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); /* Set RTS/CTS flow control. */ outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); @@ -2522,6 +2523,15 @@ comparam(tp, t) */ com->fifo_image = t->c_ospeed <= 4800 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; +#ifdef COM_ESP + /* + * The Hayes ESP card needs the fifo DMA mode bit set + * in compatibility mode. If not, it will interrupt + * for each character received. + */ + if (com->esp) + com->fifo_image |= FIFO_DMA_MODE; +#endif outb(iobase + com_fifo, com->fifo_image); } @@ -2804,6 +2814,10 @@ siostop(tp, rw) disable_intr(); if (rw & FWRITE) { if (com->hasfifo) +#ifdef COM_ESP + /* XXX avoid h/w bug. */ + if (!com->esp) +#endif /* XXX does this flush everything? */ outb(com->iobase + com_fifo, FIFO_XMT_RST | com->fifo_image); @@ -2816,6 +2830,10 @@ siostop(tp, rw) } if (rw & FREAD) { if (com->hasfifo) +#ifdef COM_ESP + /* XXX avoid h/w bug. */ + if (!com->esp) +#endif /* XXX does this flush everything? */ outb(com->iobase + com_fifo, FIFO_RCV_RST | com->fifo_image); |