[src/trunk]: src/sys/arch/arm/sociox improve comments

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

details:   https://anonhg.NetBSD.org/src/rev/2302961bfc40
branches:  trunk
changeset: 746100:2302961bfc40
user:      nisimura <nisimura%NetBSD.org@localhost>
date:      Sun Mar 22 00:14:16 2020 +0000

description:
improve comments

diffstat:

 sys/arch/arm/sociox/if_ave.c |  10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diffs (43 lines):

diff -r 16eb5db79364 -r 2302961bfc40 sys/arch/arm/sociox/if_ave.c
--- a/sys/arch/arm/sociox/if_ave.c      Sun Mar 22 00:11:02 2020 +0000
+++ b/sys/arch/arm/sociox/if_ave.c      Sun Mar 22 00:14:16 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ave.c,v 1.9 2020/03/22 00:05:17 nisimura Exp $      */
+/*     $NetBSD: if_ave.c,v 1.10 2020/03/22 00:14:16 nisimura Exp $     */
 
 /*-
  * Copyright (c) 2020 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_ave.c,v 1.9 2020/03/22 00:05:17 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_ave.c,v 1.10 2020/03/22 00:14:16 nisimura Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -82,13 +82,13 @@
 #define  GISR_RXDROP   (1U<<6)         /* PAUSE frame has been dropped */
 #define  GISR_RXIT     (1U<<5)         /* receive itimer notify */
 #define AVETXC         0x200           /* transmit control */
-#define  TXC_FCE       (1U<<18)        /* enable Tx flow control */
+#define  TXC_FCE       (1U<<18)        /* generate PAUSE to moderate Rx lvl */
 #define  TXC_SPD1000   (1U<<17)        /* use 1000Mbps */
 #define  TXC_SPD100    (1U<<16)        /* use 100Mbps */
 #define AVERXC         0x204           /* receive control */
 #define  RXC_EN                (1U<<30)        /* enable receive circuit */
 #define  RXC_USEFDX    (1U<<22)        /* use full-duplex */
-#define  RXC_FCE       (1U<<21)        /* enable Rx flow control */
+#define  RXC_FCE       (1U<<21)        /* accept PAUSE to throttle Tx */
 #define  RXC_AFE       (1U<<19)        /* use address filter (!promisc) */
 #define  RXC_DRPEN     (1U<<18)        /* drop receiving PAUSE frames */
 /* RXC 15:0 max frame length to accept */
@@ -287,7 +287,7 @@
            bus_space_write_4((sc)->sc_st, (sc)->sc_sh, (off), (val))
 
 static const struct of_compat_data compat_data[] = {
-       { "socionext,unifier-ld20-ave4", 64 },
+       { "socionext,unifier-ld20-ave4", 64 },  /* XXX only this for now */
        { "socionext,unifier-pro4-ave4", 32 },
        { "socionext,unifier-pxs2-ave4", 32 },
        { "socionext,unifier-ld11-ave4", 32 },