git: 74c406678245 - stable/12 - if_dwc: Add a function to enable/disable the mac tx/rx

The branch stable/12 has been updated by mhorne:

URL: https://cgit.FreeBSD.org/src/commit/?id=74c406678245a68e4345eec57790feaa67533bad

commit 74c406678245a68e4345eec57790feaa67533bad
Author:     Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2020-11-20 11:27:43 +0000
Commit:     Mitchell Horne <mhorne@FreeBSD.org>
CommitDate: 2022-08-11 14:52:02 +0000

    if_dwc: Add a function to enable/disable the mac tx/rx
    
    No functional changes intended
    
    (cherry picked from commit f368f4b10924cb530e5ab2ada38bb2b08e193ea8)
---
 sys/dev/dwc/if_dwc.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/sys/dev/dwc/if_dwc.c b/sys/dev/dwc/if_dwc.c
index e4270f7dd3de..74e5922ff828 100644
--- a/sys/dev/dwc/if_dwc.c
+++ b/sys/dev/dwc/if_dwc.c
@@ -212,6 +212,7 @@ static void dwc_rxfinish_locked(struct dwc_softc *sc);
 static void dwc_stop_locked(struct dwc_softc *sc);
 static void dwc_setup_rxfilter(struct dwc_softc *sc);
 static void dwc_setup_core(struct dwc_softc *sc);
+static void dwc_enable_mac(struct dwc_softc *sc, bool enable);
 static void dwc_init_dma(struct dwc_softc *sc);
 
 static inline uint32_t
@@ -483,6 +484,7 @@ dwc_init_locked(struct dwc_softc *sc)
 
 	dwc_setup_rxfilter(sc);
 	dwc_setup_core(sc);
+	dwc_enable_mac(sc, true);
 	dwc_init_dma(sc);
 
 	if_setdrvflagbits(ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
@@ -778,10 +780,23 @@ dwc_setup_core(struct dwc_softc *sc)
 
 	DWC_ASSERT_LOCKED(sc);
 
-	/* Enable transmitters */
+	/* Enable core */
 	reg = READ4(sc, MAC_CONFIGURATION);
 	reg |= (CONF_JD | CONF_ACS | CONF_BE);
-	reg |= (CONF_TE | CONF_RE);
+	WRITE4(sc, MAC_CONFIGURATION, reg);
+}
+
+static void
+dwc_enable_mac(struct dwc_softc *sc, bool enable)
+{
+	uint32_t reg;
+
+	DWC_ASSERT_LOCKED(sc);
+	reg = READ4(sc, MAC_CONFIGURATION);
+	if (enable)
+		reg |= CONF_TE | CONF_RE;
+	else
+		reg &= ~(CONF_TE | CONF_RE);
 	WRITE4(sc, MAC_CONFIGURATION, reg);
 }