diff options
| -rw-r--r-- | drivers/net/irda/sa1100_ir.c | 118 |
1 files changed, 66 insertions, 52 deletions
diff --git a/drivers/net/irda/sa1100_ir.c b/drivers/net/irda/sa1100_ir.c index bfae34fa7a9..8b8cf415260 100644 --- a/drivers/net/irda/sa1100_ir.c +++ b/drivers/net/irda/sa1100_ir.c @@ -68,6 +68,8 @@ struct sa1100_irda { iobuff_t tx_buff; iobuff_t rx_buff; + + int (*tx_start)(struct sk_buff *, struct net_device *, struct sa1100_irda *); }; static int sa1100_irda_set_speed(struct sa1100_irda *, int); @@ -140,6 +142,63 @@ static void sa1100_irda_check_speed(struct sa1100_irda *si) } /* + * HP-SIR format support. + */ +static int sa1100_irda_sir_tx_start(struct sk_buff *skb, struct net_device *dev, + struct sa1100_irda *si) +{ + si->tx_buff.data = si->tx_buff.head; + si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, + si->tx_buff.truesize); + + /* + * Set the transmit interrupt enable. This will fire off an + * interrupt immediately. Note that we disable the receiver + * so we won't get spurious characters received. + */ + Ser2UTCR3 = UTCR3_TIE | UTCR3_TXE; + + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +/* + * FIR format support. + */ +static int sa1100_irda_fir_tx_start(struct sk_buff *skb, struct net_device *dev, + struct sa1100_irda *si) +{ + int mtt = irda_get_mtt(skb); + + si->dma_tx.skb = skb; + si->dma_tx.dma = dma_map_single(si->dev, skb->data, skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(si->dev, si->dma_tx.dma)) { + si->dma_tx.skb = NULL; + netif_wake_queue(dev); + dev->stats.tx_dropped++; + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + sa1100_start_dma(si->dma_tx.regs, si->dma_tx.dma, skb->len); + + /* + * If we have a mean turn-around time, impose the specified + * specified delay. We could shorten this by timing from + * the point we received the packet. + */ + if (mtt) + udelay(mtt); + + Ser2HSCR0 = si->hscr0 | HSCR0_HSSP | HSCR0_TXE; + + return NETDEV_TX_OK; +} + + +/* * Set the IrDA communications speed. */ static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed) @@ -176,6 +235,7 @@ static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed) si->pdata->set_speed(si->dev, speed); si->speed = speed; + si->tx_start = sa1100_irda_sir_tx_start; local_irq_restore(flags); ret = 0; @@ -191,6 +251,7 @@ static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed) Ser2UTCR3 = 0; si->speed = speed; + si->tx_start = sa1100_irda_fir_tx_start; if (si->pdata->set_speed) si->pdata->set_speed(si->dev, speed); @@ -538,66 +599,19 @@ static int sa1100_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) if (speed != si->speed && speed != -1) si->newspeed = speed; - /* - * If this is an empty frame, we can bypass a lot. - */ + /* If this is an empty frame, we can bypass a lot. */ if (skb->len == 0) { sa1100_irda_check_speed(si); dev_kfree_skb(skb); return NETDEV_TX_OK; } - if (!IS_FIR(si)) { - netif_stop_queue(dev); - - si->tx_buff.data = si->tx_buff.head; - si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, - si->tx_buff.truesize); - - /* - * Set the transmit interrupt enable. This will fire - * off an interrupt immediately. Note that we disable - * the receiver so we won't get spurious characteres - * received. - */ - Ser2UTCR3 = UTCR3_TIE | UTCR3_TXE; - - dev_kfree_skb(skb); - } else { - int mtt = irda_get_mtt(skb); - - /* - * We must not be transmitting... - */ - BUG_ON(si->dma_tx.skb); - - netif_stop_queue(dev); - - si->dma_tx.skb = skb; - si->dma_tx.dma = dma_map_single(si->dev, skb->data, - skb->len, DMA_TO_DEVICE); - if (dma_mapping_error(si->dev, si->dma_tx.dma)) { - si->dma_tx.skb = NULL; - netif_wake_queue(dev); - dev->stats.tx_dropped++; - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - - sa1100_start_dma(si->dma_tx.regs, si->dma_tx.dma, skb->len); - - /* - * If we have a mean turn-around time, impose the specified - * specified delay. We could shorten this by timing from - * the point we received the packet. - */ - if (mtt) - udelay(mtt); + netif_stop_queue(dev); - Ser2HSCR0 = si->hscr0 | HSCR0_HSSP | HSCR0_TXE; - } + /* We must not already have a skb to transmit... */ + BUG_ON(si->dma_tx.skb); - return NETDEV_TX_OK; + return si->tx_start(skb, dev, si); } static int |