NET: sa11x0-ir: move SIR and FIR interrupt support

Move the interrupt handlers to the SIR and FIR sections of the file.
This improves the localization of the protocol handlers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/net/irda/sa1100_ir.c

@@ -164,151 +164,6 @@ static int sa1100_irda_sir_tx_start(struct sk_buff *skb, struct net_device *dev,
 	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;
-}
-
-static irqreturn_t sa1100_irda_sir_irq(struct net_device *, struct sa1100_irda *);
-static irqreturn_t sa1100_irda_fir_irq(struct net_device *, struct sa1100_irda *);
-
-/*
- * Set the IrDA communications speed.
- */
-static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed)
-{
-	unsigned long flags;
-	int brd, ret = -EINVAL;
-
-	switch (speed) {
-	case 9600:	case 19200:	case 38400:
-	case 57600:	case 115200:
-		brd = 3686400 / (16 * speed) - 1;
-
-		/*
-		 * Stop the receive DMA.
-		 */
-		if (IS_FIR(si))
-			sa1100_stop_dma(si->dma_rx.regs);
-
-		local_irq_save(flags);
-
-		Ser2UTCR3 = 0;
-		Ser2HSCR0 = HSCR0_UART;
-
-		Ser2UTCR1 = brd >> 8;
-		Ser2UTCR2 = brd;
-
-		/*
-		 * Clear status register
-		 */
-		Ser2UTSR0 = UTSR0_REB | UTSR0_RBB | UTSR0_RID;
-		Ser2UTCR3 = UTCR3_RIE | UTCR3_RXE | UTCR3_TXE;
-
-		if (si->pdata->set_speed)
-			si->pdata->set_speed(si->dev, speed);
-
-		si->speed = speed;
-		si->tx_start = sa1100_irda_sir_tx_start;
-		si->irq = sa1100_irda_sir_irq;
-
-		local_irq_restore(flags);
-		ret = 0;
-		break;
-
-	case 4000000:
-		local_irq_save(flags);
-
-		si->hscr0 = 0;
-
-		Ser2HSSR0 = 0xff;
-		Ser2HSCR0 = si->hscr0 | HSCR0_HSSP;
-		Ser2UTCR3 = 0;
-
-		si->speed = speed;
-		si->tx_start = sa1100_irda_fir_tx_start;
-		si->irq = sa1100_irda_fir_irq;
-
-		if (si->pdata->set_speed)
-			si->pdata->set_speed(si->dev, speed);
-
-		sa1100_irda_rx_alloc(si);
-		sa1100_irda_rx_dma_start(si);
-
-		local_irq_restore(flags);
-
-		break;
-
-	default:
-		break;
-	}
-
-	return ret;
-}
-
-/*
- * Control the power state of the IrDA transmitter.
- * State:
- *  0 - off
- *  1 - short range, lowest power
- *  2 - medium range, medium power
- *  3 - maximum range, high power
- *
- * Currently, only assabet is known to support this.
- */
-static int
-__sa1100_irda_set_power(struct sa1100_irda *si, unsigned int state)
-{
-	int ret = 0;
-	if (si->pdata->set_power)
-		ret = si->pdata->set_power(si->dev, state);
-	return ret;
-}
-
-static inline int
-sa1100_set_power(struct sa1100_irda *si, unsigned int state)
-{
-	int ret;
-
-	ret = __sa1100_irda_set_power(si, state);
-	if (ret == 0)
-		si->power = state;
-
-	return ret;
-}
-
-/*
- * HP-SIR format interrupt service routines.
- */
 static irqreturn_t sa1100_irda_sir_irq(struct net_device *dev, struct sa1100_irda *si)
 {
 	int status;
@@ -403,6 +258,40 @@ static irqreturn_t sa1100_irda_sir_irq(struct net_device *dev, struct sa1100_ird
 	return IRQ_HANDLED;
 }
 
+/*
+ * 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;
+}
+
 static void sa1100_irda_fir_error(struct sa1100_irda *si, struct net_device *dev)
 {
 	struct sk_buff *skb = si->dma_rx.skb;
@@ -476,10 +365,8 @@ static void sa1100_irda_fir_error(struct sa1100_irda *si, struct net_device *dev
 }
 
 /*
- * FIR format interrupt service routine.  We only have to
- * handle RX events; transmit events go via the TX DMA handler.
- *
- * No matter what, we disable RX, process, and the restart RX.
+ * We only have to handle RX events here; transmit events go via the TX
+ * DMA handler. We disable RX, process, and the restart RX.
  */
 static irqreturn_t sa1100_irda_fir_irq(struct net_device *dev, struct sa1100_irda *si)
 {
@@ -528,6 +415,111 @@ static irqreturn_t sa1100_irda_fir_irq(struct net_device *dev, struct sa1100_ird
 	return IRQ_HANDLED;
 }
 
+/*
+ * Set the IrDA communications speed.
+ */
+static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed)
+{
+	unsigned long flags;
+	int brd, ret = -EINVAL;
+
+	switch (speed) {
+	case 9600:	case 19200:	case 38400:
+	case 57600:	case 115200:
+		brd = 3686400 / (16 * speed) - 1;
+
+		/*
+		 * Stop the receive DMA.
+		 */
+		if (IS_FIR(si))
+			sa1100_stop_dma(si->dma_rx.regs);
+
+		local_irq_save(flags);
+
+		Ser2UTCR3 = 0;
+		Ser2HSCR0 = HSCR0_UART;
+
+		Ser2UTCR1 = brd >> 8;
+		Ser2UTCR2 = brd;
+
+		/*
+		 * Clear status register
+		 */
+		Ser2UTSR0 = UTSR0_REB | UTSR0_RBB | UTSR0_RID;
+		Ser2UTCR3 = UTCR3_RIE | UTCR3_RXE | UTCR3_TXE;
+
+		if (si->pdata->set_speed)
+			si->pdata->set_speed(si->dev, speed);
+
+		si->speed = speed;
+		si->tx_start = sa1100_irda_sir_tx_start;
+		si->irq = sa1100_irda_sir_irq;
+
+		local_irq_restore(flags);
+		ret = 0;
+		break;
+
+	case 4000000:
+		local_irq_save(flags);
+
+		si->hscr0 = 0;
+
+		Ser2HSSR0 = 0xff;
+		Ser2HSCR0 = si->hscr0 | HSCR0_HSSP;
+		Ser2UTCR3 = 0;
+
+		si->speed = speed;
+		si->tx_start = sa1100_irda_fir_tx_start;
+		si->irq = sa1100_irda_fir_irq;
+
+		if (si->pdata->set_speed)
+			si->pdata->set_speed(si->dev, speed);
+
+		sa1100_irda_rx_alloc(si);
+		sa1100_irda_rx_dma_start(si);
+
+		local_irq_restore(flags);
+
+		break;
+
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/*
+ * Control the power state of the IrDA transmitter.
+ * State:
+ *  0 - off
+ *  1 - short range, lowest power
+ *  2 - medium range, medium power
+ *  3 - maximum range, high power
+ *
+ * Currently, only assabet is known to support this.
+ */
+static int
+__sa1100_irda_set_power(struct sa1100_irda *si, unsigned int state)
+{
+	int ret = 0;
+	if (si->pdata->set_power)
+		ret = si->pdata->set_power(si->dev, state);
+	return ret;
+}
+
+static inline int
+sa1100_set_power(struct sa1100_irda *si, unsigned int state)
+{
+	int ret;
+
+	ret = __sa1100_irda_set_power(si, state);
+	if (ret == 0)
+		si->power = state;
+
+	return ret;
+}
+
 static irqreturn_t sa1100_irda_irq(int irq, void *dev_id)
 {
 	struct net_device *dev = dev_id;