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if_awg: Add a awg_dma_start_tx function that trigger dma engine

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No functional changes intended
This commit is contained in:
Emmanuel Vadot 2020-11-20 11:30:44 +00:00
parent 3bbd11ee51
commit 354cb625ee
1 changed files with 13 additions and 4 deletions
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17
sys/arm/allwinner/if_awg.c
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@ -941,6 +941,18 @@ awg_setup_dma(device_t dev)
return (0);
}
static void
awg_dma_start_tx(struct awg_softc *sc)
{
uint32_t val;
AWG_ASSERT_LOCKED(sc);
/* Start and run TX DMA */
val = RD4(sc, EMAC_TX_CTL_1);
WR4(sc, EMAC_TX_CTL_1, val | TX_DMA_START);
}
/*
* if_ functions
*/
@ -949,7 +961,6 @@ static void
awg_start_locked(struct awg_softc *sc)
{
struct mbuf *m;
uint32_t val;
if_t ifp;
int cnt, err;
@ -984,9 +995,7 @@ awg_start_locked(struct awg_softc *sc)
bus_dmamap_sync(sc->tx.desc_tag, sc->tx.desc_map,
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/* Start and run TX DMA */
val = RD4(sc, EMAC_TX_CTL_1);
WR4(sc, EMAC_TX_CTL_1, val | TX_DMA_START);
awg_dma_start_tx(sc);
}
}