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Commit 26f2bee1 authored by Russell King's avatar Russell King
Browse files

NET: sa11x0-ir: move sa1100_irda_txdma_irq 



Move the FIR DMA transmit completion function along-side the other FIR
protocol functions.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent a6b2ea66

drivers/net/irda/sa1100_ir.c

+53 −55
Original line number Diff line number Diff line
@@ -261,6 +261,57 @@ static irqreturn_t sa1100_irda_sir_irq(struct net_device *dev, struct sa1100_ird 
/*

 * FIR format support.

 */

static void sa1100_irda_firtxdma_irq(void *id)

{

	struct net_device *dev = id;

	struct sa1100_irda *si = netdev_priv(dev);

	struct sk_buff *skb;



	/*

	 * Wait for the transmission to complete.  Unfortunately,

	 * the hardware doesn't give us an interrupt to indicate

	 * "end of frame".

	 */

	do

		rmb();

	while (!(Ser2HSSR0 & HSSR0_TUR) || Ser2HSSR1 & HSSR1_TBY);



	/*

	 * Clear the transmit underrun bit.

	 */

	Ser2HSSR0 = HSSR0_TUR;



	/*

	 * Do we need to change speed?  Note that we're lazy

	 * here - we don't free the old dma_rx.skb.  We don't need

	 * to allocate a buffer either.

	 */

	sa1100_irda_check_speed(si);



	/*

	 * Start reception.  This disables the transmitter for

	 * us.  This will be using the existing RX buffer.

	 */

	sa1100_irda_rx_dma_start(si);



	/* Account and free the packet. */

	skb = si->dma_tx.skb;

	if (skb) {

		dma_unmap_single(si->dev, si->dma_tx.dma, skb->len,

				 DMA_TO_DEVICE);

		dev->stats.tx_packets ++;

		dev->stats.tx_bytes += skb->len;

		dev_kfree_skb_irq(skb);

		si->dma_tx.skb = NULL;

	}



	/*

	 * Make sure that the TX queue is available for sending

	 * (for retries).  TX has priority over RX at all times.

	 */

	netif_wake_queue(dev);

}



static int sa1100_irda_fir_tx_start(struct sk_buff *skb, struct net_device *dev,

	struct sa1100_irda *si)

{
@@ -528,60 +579,6 @@ static irqreturn_t sa1100_irda_irq(int irq, void *dev_id) 
	return si->irq(dev, si);

}



/*

 * TX DMA completion handler.

 */

static void sa1100_irda_txdma_irq(void *id)

{

	struct net_device *dev = id;

	struct sa1100_irda *si = netdev_priv(dev);

	struct sk_buff *skb;



	/*

	 * Wait for the transmission to complete.  Unfortunately,

	 * the hardware doesn't give us an interrupt to indicate

	 * "end of frame".

	 */

	do

		rmb();

	while (!(Ser2HSSR0 & HSSR0_TUR) || Ser2HSSR1 & HSSR1_TBY);



	/*

	 * Clear the transmit underrun bit.

	 */

	Ser2HSSR0 = HSSR0_TUR;



	/*

	 * Do we need to change speed?  Note that we're lazy

	 * here - we don't free the old dma_rx.skb.  We don't need

	 * to allocate a buffer either.

	 */

	sa1100_irda_check_speed(si);



	/*

	 * Start reception.  This disables the transmitter for

	 * us.  This will be using the existing RX buffer.

	 */

	sa1100_irda_rx_dma_start(si);



	/* Account and free the packet. */

	skb = si->dma_tx.skb;

	if (skb) {

		dma_unmap_single(si->dev, si->dma_tx.dma, skb->len,

				 DMA_TO_DEVICE);

		dev->stats.tx_packets ++;

		dev->stats.tx_bytes += skb->len;

		dev_kfree_skb_irq(skb);

		si->dma_tx.skb = NULL;

	}



	/*

	 * Make sure that the TX queue is available for sending

	 * (for retries).  TX has priority over RX at all times.

	 */

	netif_wake_queue(dev);

}



static int sa1100_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)

{

	struct sa1100_irda *si = netdev_priv(dev);
@@ -730,7 +727,8 @@ static int sa1100_irda_start(struct net_device *dev) 
		goto err_rx_dma;



	err = sa1100_request_dma(DMA_Ser2HSSPWr, "IrDA transmit",

				 sa1100_irda_txdma_irq, dev, &si->dma_tx.regs);

				 sa1100_irda_firtxdma_irq, dev,

				 &si->dma_tx.regs);

	if (err)

		goto err_tx_dma;