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WAN: Simplify sca_init_port() in HD64572 driver.

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Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa 2008-07-11 00:13:09 +02:00
parent fcfe9ff3e2
commit e1f024eb5d
1 changed files with 31 additions and 36 deletions
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53
drivers/net/wan/hd64572.c
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@ -131,6 +131,7 @@ static inline void sca_set_carrier(port_t *port)
static void sca_init_port(port_t *port)
{
card_t *card = port->card;
u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
int transmit, i;
port->rxin = 0;
@ -138,7 +139,6 @@ static void sca_init_port(port_t *port)
port->txlast = 0;
for (transmit = 0; transmit < 2; transmit++) {
u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
u16 buffs = transmit ? card->tx_ring_buffers
: card->rx_ring_buffers;
@ -152,42 +152,37 @@ static void sca_init_port(port_t *port)
writew(0, &desc->len);
writeb(0, &desc->stat);
}
}
/* DMA disable - to halt state */
sca_out(0, transmit ? DSR_TX(port->chan) :
DSR_RX(port->chan), card);
sca_out(0, DSR_RX(port->chan), card);
sca_out(0, DSR_TX(port->chan), card);
/* software ABORT - to initial state */
sca_out(DCR_ABORT, transmit ? DCR_TX(port->chan) :
DCR_RX(port->chan), card);
sca_out(DCR_ABORT, DCR_RX(port->chan), card);
sca_out(DCR_ABORT, DCR_TX(port->chan), card);
/* current desc addr */
sca_outl(desc_offset(port, 0, transmit), dmac + CDAL, card);
if (!transmit)
sca_outl(desc_offset(port, buffs - 1, transmit),
dmac + EDAL, card);
else
sca_outl(desc_offset(port, 0, transmit), dmac + EDAL,
card);
sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
dmac_rx + EDAL, card);
sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
/* clear frame end interrupt counter */
sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(port->chan) :
DCR_RX(port->chan), card);
sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
/* Receive */
sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
/* Transmit */
sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
if (!transmit) { /* Receive */
/* set buffer length */
sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
/* Chain mode, Multi-frame */
sca_out(0x14, DMR_RX(port->chan), card);
sca_out(DIR_EOME, DIR_RX(port->chan), card);
/* DMA enable */
sca_out(DSR_DE, DSR_RX(port->chan), card);
} else { /* Transmit */
/* Chain mode, Multi-frame */
sca_out(0x14, DMR_TX(port->chan), card);
/* enable underflow interrupts */
sca_out(DIR_EOME, DIR_TX(port->chan), card);
}
}
sca_set_carrier(port);
netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
}