[src/trunk]: src/sys/dev/sbus Issue a reset command when initializing.

[pk <pk%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9f8588e7927b
branches:  trunk
changeset: 473988:9f8588e7927b
user:      pk <pk%NetBSD.org@localhost>
date:      Thu Jun 24 19:56:51 1999 +0000

description:
Issue a reset command when initializing.

diffstat:

 sys/dev/sbus/qec.c |  17 ++++++++++++++---
 1 files changed, 14 insertions(+), 3 deletions(-)

diffs (38 lines):

diff -r 890423ee0f90 -r 9f8588e7927b sys/dev/sbus/qec.c
--- a/sys/dev/sbus/qec.c        Thu Jun 24 18:47:58 1999 +0000
+++ b/sys/dev/sbus/qec.c        Thu Jun 24 19:56:51 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: qec.c,v 1.8 1999/01/17 20:47:50 pk Exp $ */
+/*     $NetBSD: qec.c,v 1.9 1999/06/24 19:56:51 pk Exp $ */
 
 /*-
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -298,7 +298,17 @@
 {
        bus_space_tag_t t = sc->sc_bustag;
        bus_space_handle_t qr = sc->sc_regs;
-       u_int32_t v, burst = 0;
+       u_int32_t v, burst = 0, psize;
+       int i;
+
+       /* First, reset the controller */
+       bus_space_write_4(t, qr, QEC_QRI_CTRL, QEC_CTRL_RESET);
+       for (i = 0; i < 1000; i++) {
+               DELAY(100);
+               v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
+               if ((v & QEC_CTRL_RESET) == 0)
+                       break;
+       }
 
        /*
         * Cut available buffer size into receive and transmit buffers.
@@ -311,7 +321,8 @@
        bus_space_write_4(t, qr, QEC_QRI_RSIZE, v);
        bus_space_write_4(t, qr, QEC_QRI_TSIZE, v);
 
-       bus_space_write_4(t, qr, QEC_QRI_PSIZE, QEC_PSIZE_2048);
+       psize = sc->sc_nchannels == 1 ? QEC_PSIZE_2048 : 0;
+       bus_space_write_4(t, qr, QEC_QRI_PSIZE, psize);
 
        if (sc->sc_burst & SBUS_BURST_64)
                burst = QEC_CTRL_B64;