[src/trunk]: src/sys/dev/pci use FC enable bit for 8842 host port

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

details:   https://anonhg.NetBSD.org/src/rev/f08c3a5e7cbf
branches:  trunk
changeset: 466146:f08c3a5e7cbf
user:      nisimura <nisimura%NetBSD.org@localhost>
date:      Sat Dec 14 04:12:49 2019 +0000

description:
use FC enable bit for 8842 host port

diffstat:

 sys/dev/pci/if_kse.c |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (45 lines):

diff -r be1fddabba5e -r f08c3a5e7cbf sys/dev/pci/if_kse.c
--- a/sys/dev/pci/if_kse.c      Sat Dec 14 02:58:19 2019 +0000
+++ b/sys/dev/pci/if_kse.c      Sat Dec 14 04:12:49 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_kse.c,v 1.45 2019/12/12 12:00:06 nisimura Exp $     */
+/*     $NetBSD: if_kse.c,v 1.46 2019/12/14 04:12:49 nisimura Exp $     */
 
 /*-
  * Copyright (c) 2006 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_kse.c,v 1.45 2019/12/12 12:00:06 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_kse.c,v 1.46 2019/12/14 04:12:49 nisimura Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -91,6 +91,9 @@
 #define MARH   0x204   /* MAC address high */
 #define GRR    0x216   /* global reset */
 #define SIDER  0x400   /* switch ID and function enable */
+#define SGCR3  0x406   /* switch function control 3 */
+#define  CR3_USEHDX    (1U<<6) /* use half-duplex 8842 host port */
+#define  CR3_USEFC     (1U<<5) /* use flowcontrol 8842 host port */
 #define IACR   0x4a0   /* indirect access control */
 #define IADR1  0x4a2   /* indirect access data 66:63 */
 #define IADR2  0x4a4   /* indirect access data 47:32 */
@@ -145,6 +148,7 @@
 #define INT_DMTS       (1U<<30)        /* sending desc. has posted Tx done */
 #define INT_DMRS       (1U<<29)        /* frame was received */
 #define INT_DMRBUS     (1U<<27)        /* Rx descriptor pool is full */
+#define INT_DMxPSS     (3U<<25)        /* 26:25 DMA Tx/Rx have stopped */
 
 #define T0_OWN         (1U<<31)        /* desc is ready to Tx */
 
@@ -825,6 +829,8 @@
        if (sc->sc_chip == 0x8842) {
                sc->sc_txc |= TXC_FCE;
                sc->sc_rxc |= RXC_FCE;
+               CSR_WRITE_2(sc, SGCR3,
+                   CSR_READ_2(sc, SGCR3) | CR3_USEFC);
        }
 
        /* build multicast hash filter if necessary */