[src/trunk]: src/sys/dev/mii Add a no-rx-delay device property for RGE8211E t...

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

details:   https://anonhg.NetBSD.org/src/rev/7debe8b8747e
branches:  trunk
changeset: 828649:7debe8b8747e
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Dec 23 12:49:54 2017 +0000

description:
Add a no-rx-delay device property for RGE8211E that disables RX internal
delay using some undocumented registers. Required for stable gigabit links
on Pine64+.

diffstat:

 sys/dev/mii/rgephy.c |  16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diffs (37 lines):

diff -r d193f825cce2 -r 7debe8b8747e sys/dev/mii/rgephy.c
--- a/sys/dev/mii/rgephy.c      Sat Dec 23 10:15:52 2017 +0000
+++ b/sys/dev/mii/rgephy.c      Sat Dec 23 12:49:54 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rgephy.c,v 1.40 2015/08/21 12:22:22 jmcneill Exp $     */
+/*     $NetBSD: rgephy.c,v 1.41 2017/12/23 12:49:54 jmcneill Exp $     */
 
 /*
  * Copyright (c) 2003
@@ -33,7 +33,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rgephy.c,v 1.40 2015/08/21 12:22:22 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rgephy.c,v 1.41 2017/12/23 12:49:54 jmcneill Exp $");
 
 
 /*
@@ -634,6 +634,18 @@
                        ssr &= ~RGEPHY_SSR_ALDPS;
                        PHY_WRITE(sc, RGEPHY_MII_SSR, ssr);
                }
+       } else if (sc->mii_mpd_rev == 5) {
+               /* RTL8211E */
+               prop_dictionary_t prop = device_properties(sc->mii_dev);
+               bool no_rx_delay = false;
+               prop_dictionary_get_bool(prop, "no-rx-delay", &no_rx_delay);
+               if (no_rx_delay) {
+                       /* Disable RX internal delay (undocumented) */
+                       PHY_WRITE(sc, 0x1f, 0x0007);
+                       PHY_WRITE(sc, 0x1e, 0x00a4);
+                       PHY_WRITE(sc, 0x1c, 0xb591);
+                       PHY_WRITE(sc, 0x1f, 0x0000);
+               }
        } else if (sc->mii_mpd_rev == 6) {
                /* RTL8211F */
                phycr1 = PHY_READ(sc, RGEPHY_MII_PHYCR1);