WAN: Simplify sca_init_port() in HD64572 driver.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

diff --git a/drivers/net/wan/hd64572.c b/drivers/net/wan/hd64572.c
index 1de3cb7371a7568e47de13bf8ab8edeef5834f7c..0bcc0b5f22d7ef06b9890a0eb9a53ef65ba7cce4 100644 (file)
--- a/drivers/net/wan/hd64572.c
+++ b/drivers/net/wan/hd64572.c
@@ -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);
-               /* software ABORT - to initial state */
-               sca_out(DCR_ABORT, transmit ? DCR_TX(port->chan) :
-                       DCR_RX(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);
-
-               /* clear frame end interrupt counter */
-               sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(port->chan) :
-                       DCR_RX(port->chan), card);
-
-               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);
-               }
        }
+
+       /* DMA disable - to halt state */
+       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, DCR_RX(port->chan), card);
+       sca_out(DCR_ABORT, DCR_TX(port->chan), card);
+
+       /* current desc addr */
+       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, 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 */
+
        sca_set_carrier(port);
        netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
 }