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WAN: Simplify sca_init_port() in HD64572 driver.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
parent
fcfe9ff3e2
commit
e1f024eb5d
1 changed files with 31 additions and 36 deletions
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@ -131,6 +131,7 @@ static inline void sca_set_carrier(port_t *port)
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static void sca_init_port(port_t *port)
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{
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card_t *card = port->card;
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u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
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int transmit, i;
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port->rxin = 0;
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@ -138,7 +139,6 @@ static void sca_init_port(port_t *port)
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port->txlast = 0;
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for (transmit = 0; transmit < 2; transmit++) {
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u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
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u16 buffs = transmit ? card->tx_ring_buffers
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: card->rx_ring_buffers;
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@ -152,42 +152,37 @@ static void sca_init_port(port_t *port)
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writew(0, &desc->len);
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writeb(0, &desc->stat);
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}
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/* DMA disable - to halt state */
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sca_out(0, transmit ? DSR_TX(port->chan) :
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DSR_RX(port->chan), card);
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/* software ABORT - to initial state */
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sca_out(DCR_ABORT, transmit ? DCR_TX(port->chan) :
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DCR_RX(port->chan), card);
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/* current desc addr */
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sca_outl(desc_offset(port, 0, transmit), dmac + CDAL, card);
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if (!transmit)
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sca_outl(desc_offset(port, buffs - 1, transmit),
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dmac + EDAL, card);
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else
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sca_outl(desc_offset(port, 0, transmit), dmac + EDAL,
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card);
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/* clear frame end interrupt counter */
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sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(port->chan) :
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DCR_RX(port->chan), card);
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if (!transmit) { /* Receive */
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/* set buffer length */
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sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
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/* Chain mode, Multi-frame */
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sca_out(0x14, DMR_RX(port->chan), card);
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sca_out(DIR_EOME, DIR_RX(port->chan), card);
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/* DMA enable */
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sca_out(DSR_DE, DSR_RX(port->chan), card);
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} else { /* Transmit */
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/* Chain mode, Multi-frame */
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sca_out(0x14, DMR_TX(port->chan), card);
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/* enable underflow interrupts */
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sca_out(DIR_EOME, DIR_TX(port->chan), card);
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}
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}
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/* DMA disable - to halt state */
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sca_out(0, DSR_RX(port->chan), card);
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sca_out(0, DSR_TX(port->chan), card);
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/* software ABORT - to initial state */
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sca_out(DCR_ABORT, DCR_RX(port->chan), card);
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sca_out(DCR_ABORT, DCR_TX(port->chan), card);
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/* current desc addr */
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sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
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sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
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dmac_rx + EDAL, card);
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sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
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sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
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/* clear frame end interrupt counter */
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sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
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sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
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/* Receive */
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sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
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sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
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sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
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sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
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/* Transmit */
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sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
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sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
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sca_set_carrier(port);
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netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
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}
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