ASoC: davinci-mcasp: Simplify FIFO configuration code

The FIFO registers base address is different in dm646x compared to newer
SoCs with McASP IP. Instead of using two paths (switch/case) to handle the
difference we can simply pick the correct base address beforehand and use
offsets to address the register we need to configure.
With this change the indentation depth can be reduced as well.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 30 insertions, 71 deletions

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 1341f327df83..72ea45893abf 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -38,6 +38,7 @@
 struct davinci_mcasp {
 	struct davinci_pcm_dma_params dma_params[2];
 	void __iomem *base;
+	u32 fifo_base;
 	struct device *dev;
 
 	/* McASP specific data */
@@ -153,38 +154,20 @@ static void mcasp_start_tx(struct davinci_mcasp *mcasp)
 
 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
 {
+	u32 reg;
+
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		if (mcasp->txnumevt) {	/* enable FIFO */
-			switch (mcasp->version) {
-			case MCASP_VERSION_3:
-				mcasp_clr_bits(mcasp->base + MCASP_VER3_WFIFOCTL,
-					       FIFO_ENABLE);
-				mcasp_set_bits(mcasp->base + MCASP_VER3_WFIFOCTL,
-					       FIFO_ENABLE);
-				break;
-			default:
-				mcasp_clr_bits(mcasp->base +
-					DAVINCI_MCASP_WFIFOCTL,	FIFO_ENABLE);
-				mcasp_set_bits(mcasp->base +
-					DAVINCI_MCASP_WFIFOCTL,	FIFO_ENABLE);
-			}
+			reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
+			mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
+			mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
 		}
 		mcasp_start_tx(mcasp);
 	} else {
 		if (mcasp->rxnumevt) {	/* enable FIFO */
-			switch (mcasp->version) {
-			case MCASP_VERSION_3:
-				mcasp_clr_bits(mcasp->base + MCASP_VER3_RFIFOCTL,
-					       FIFO_ENABLE);
-				mcasp_set_bits(mcasp->base + MCASP_VER3_RFIFOCTL,
-					       FIFO_ENABLE);
-				break;
-			default:
-				mcasp_clr_bits(mcasp->base +
-					DAVINCI_MCASP_RFIFOCTL,	FIFO_ENABLE);
-				mcasp_set_bits(mcasp->base +
-					DAVINCI_MCASP_RFIFOCTL,	FIFO_ENABLE);
-			}
+			reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
+			mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
+			mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
 		}
 		mcasp_start_rx(mcasp);
 	}
@@ -204,31 +187,18 @@ static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
 
 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
 {
+	u32 reg;
+
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		if (mcasp->txnumevt) {	/* disable FIFO */
-			switch (mcasp->version) {
-			case MCASP_VERSION_3:
-				mcasp_clr_bits(mcasp->base + MCASP_VER3_WFIFOCTL,
-					       FIFO_ENABLE);
-				break;
-			default:
-				mcasp_clr_bits(mcasp->base +
-					DAVINCI_MCASP_WFIFOCTL,	FIFO_ENABLE);
-			}
+			reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
+			mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
 		}
 		mcasp_stop_tx(mcasp);
 	} else {
 		if (mcasp->rxnumevt) {	/* disable FIFO */
-			switch (mcasp->version) {
-			case MCASP_VERSION_3:
-				mcasp_clr_bits(mcasp->base + MCASP_VER3_RFIFOCTL,
-					       FIFO_ENABLE);
-			break;
-
-			default:
-				mcasp_clr_bits(mcasp->base +
-					DAVINCI_MCASP_RFIFOCTL,	FIFO_ENABLE);
-			}
+			reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
+			mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
 		}
 		mcasp_stop_rx(mcasp);
 	}
@@ -438,6 +408,7 @@ static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
 	u8 ser;
 	u8 slots = mcasp->tdm_slots;
 	u8 max_active_serializers = (channels + slots - 1) / slots;
+	u32 reg;
 	/* Default configuration */
 	mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
 
@@ -488,37 +459,20 @@ static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
 		if (mcasp->txnumevt * tx_ser > 64)
 			mcasp->txnumevt = 1;
 
-		switch (mcasp->version) {
-		case MCASP_VERSION_3:
-			mcasp_mod_bits(mcasp->base + MCASP_VER3_WFIFOCTL, tx_ser,
-								NUMDMA_MASK);
-			mcasp_mod_bits(mcasp->base + MCASP_VER3_WFIFOCTL,
-				((mcasp->txnumevt * tx_ser) << 8), NUMEVT_MASK);
-			break;
-		default:
-			mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_WFIFOCTL,
-							tx_ser,	NUMDMA_MASK);
-			mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_WFIFOCTL,
-				((mcasp->txnumevt * tx_ser) << 8), NUMEVT_MASK);
-		}
+		reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
+		mcasp_mod_bits(mcasp->base + reg, tx_ser, NUMDMA_MASK);
+		mcasp_mod_bits(mcasp->base + reg,
+			       ((mcasp->txnumevt * tx_ser) << 8), NUMEVT_MASK);
 	}
 
 	if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
 		if (mcasp->rxnumevt * rx_ser > 64)
 			mcasp->rxnumevt = 1;
-		switch (mcasp->version) {
-		case MCASP_VERSION_3:
-			mcasp_mod_bits(mcasp->base + MCASP_VER3_RFIFOCTL, rx_ser,
-								NUMDMA_MASK);
-			mcasp_mod_bits(mcasp->base + MCASP_VER3_RFIFOCTL,
-				((mcasp->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
-			break;
-		default:
-			mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RFIFOCTL,
-							rx_ser,	NUMDMA_MASK);
-			mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RFIFOCTL,
-				((mcasp->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
-		}
+
+		reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
+		mcasp_mod_bits(mcasp->base + reg, rx_ser, NUMDMA_MASK);
+		mcasp_mod_bits(mcasp->base + reg,
+			       ((mcasp->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
 	}
 
 	return 0;
@@ -974,6 +928,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
 	mcasp->version = pdata->version;
 	mcasp->txnumevt = pdata->txnumevt;
 	mcasp->rxnumevt = pdata->rxnumevt;
+	if (mcasp->version < MCASP_VERSION_3)
+		mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
+	else
+		mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
+
 	mcasp->dev = &pdev->dev;
 
 	dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");