ASoC: fsl-ssi: Move debugging to seperate file

Move all code that is only used for debugging to a seperate file. This
makes it easier to see what functions are used for debugging only.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Tested-By: Michael Grzeschik <mgr@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

4 files changed, 232 insertions, 236 deletions

diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index b12ad4b9b4daa..db254e358c185 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -12,7 +12,8 @@ obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o
 
 # Freescale SSI/DMA/SAI/SPDIF Support
 snd-soc-fsl-sai-objs := fsl_sai.o
-snd-soc-fsl-ssi-objs := fsl_ssi.o
+snd-soc-fsl-ssi-y := fsl_ssi.o
+snd-soc-fsl-ssi-$(CONFIG_DEBUG_FS) += fsl_ssi_dbg.o
 snd-soc-fsl-spdif-objs := fsl_spdif.o
 snd-soc-fsl-esai-objs := fsl_esai.o
 snd-soc-fsl-utils-objs := fsl_utils.o
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index fadb264e4cbb3..344f752e997d0 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -35,7 +35,6 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/clk.h>
-#include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
@@ -113,8 +112,6 @@ static inline void write_ssi_mask(u32 __iomem *addr, u32 clear, u32 set)
 #define FSLSSI_SIER_DBG_TX_FLAGS (CCSR_SSI_SIER_TFE0_EN | \
 		CCSR_SSI_SIER_TLS_EN | CCSR_SSI_SIER_TFS_EN | \
 		CCSR_SSI_SIER_TUE0_EN | CCSR_SSI_SIER_TFRC_EN)
-#define FSLSSI_SISR_MASK (FSLSSI_SIER_DBG_RX_FLAGS | FSLSSI_SIER_DBG_TX_FLAGS)
-
 
 enum fsl_ssi_type {
 	FSL_SSI_MCP8610,
@@ -177,31 +174,7 @@ struct fsl_ssi_private {
 	/* Register values for rx/tx configuration */
 	struct fsl_ssi_rxtx_reg_val rxtx_reg_val;
 
-	struct {
-		unsigned int rfrc;
-		unsigned int tfrc;
-		unsigned int cmdau;
-		unsigned int cmddu;
-		unsigned int rxt;
-		unsigned int rdr1;
-		unsigned int rdr0;
-		unsigned int tde1;
-		unsigned int tde0;
-		unsigned int roe1;
-		unsigned int roe0;
-		unsigned int tue1;
-		unsigned int tue0;
-		unsigned int tfs;
-		unsigned int rfs;
-		unsigned int tls;
-		unsigned int rls;
-		unsigned int rff1;
-		unsigned int rff0;
-		unsigned int tfe1;
-		unsigned int tfe0;
-	} stats;
-	struct dentry *dbg_dir;
-	struct dentry *dbg_stats;
+	struct fsl_ssi_dbg dbg_stats;
 
 	char name[1];
 };
@@ -231,7 +204,6 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
 {
 	struct fsl_ssi_private *ssi_private = dev_id;
 	struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
-	irqreturn_t ret = IRQ_NONE;
 	__be32 sisr;
 	__be32 sisr2;
 	__be32 sisr_write_mask = 0;
@@ -258,217 +230,18 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
 	   were interrupted for.  We mask it with the Interrupt Enable register
 	   so that we only check for events that we're interested in.
 	 */
-	sisr = read_ssi(&ssi->sisr) & FSLSSI_SISR_MASK;
-
-	if (sisr & CCSR_SSI_SISR_RFRC) {
-		ssi_private->stats.rfrc++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TFRC) {
-		ssi_private->stats.tfrc++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_CMDAU) {
-		ssi_private->stats.cmdau++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_CMDDU) {
-		ssi_private->stats.cmddu++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RXT) {
-		ssi_private->stats.rxt++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RDR1) {
-		ssi_private->stats.rdr1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RDR0) {
-		ssi_private->stats.rdr0++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TDE1) {
-		ssi_private->stats.tde1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TDE0) {
-		ssi_private->stats.tde0++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_ROE1) {
-		ssi_private->stats.roe1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_ROE0) {
-		ssi_private->stats.roe0++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TUE1) {
-		ssi_private->stats.tue1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TUE0) {
-		ssi_private->stats.tue0++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TFS) {
-		ssi_private->stats.tfs++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RFS) {
-		ssi_private->stats.rfs++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TLS) {
-		ssi_private->stats.tls++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RLS) {
-		ssi_private->stats.rls++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RFF1) {
-		ssi_private->stats.rff1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_RFF0) {
-		ssi_private->stats.rff0++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TFE1) {
-		ssi_private->stats.tfe1++;
-		ret = IRQ_HANDLED;
-	}
-
-	if (sisr & CCSR_SSI_SISR_TFE0) {
-		ssi_private->stats.tfe0++;
-		ret = IRQ_HANDLED;
-	}
+	sisr = read_ssi(&ssi->sisr);
 
 	sisr2 = sisr & sisr_write_mask;
 	/* Clear the bits that we set */
 	if (sisr2)
 		write_ssi(sisr2, &ssi->sisr);
 
-	return ret;
-}
-
-#if IS_ENABLED(CONFIG_DEBUG_FS)
-/* Show the statistics of a flag only if its interrupt is enabled.  The
- * compiler will optimze this code to a no-op if the interrupt is not
- * enabled.
- */
-#define SIER_SHOW(flag, name) \
-	do { \
-		if (FSLSSI_SISR_MASK & CCSR_SSI_SIER_##flag) \
-			seq_printf(s, #name "=%u\n", ssi_private->stats.name); \
-	} while (0)
-
-
-/**
- * fsl_sysfs_ssi_show: display SSI statistics
- *
- * Display the statistics for the current SSI device.  To avoid confusion,
- * we only show those counts that are enabled.
- */
-static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
-{
-	struct fsl_ssi_private *ssi_private = s->private;
-
-	SIER_SHOW(RFRC_EN, rfrc);
-	SIER_SHOW(TFRC_EN, tfrc);
-	SIER_SHOW(CMDAU_EN, cmdau);
-	SIER_SHOW(CMDDU_EN, cmddu);
-	SIER_SHOW(RXT_EN, rxt);
-	SIER_SHOW(RDR1_EN, rdr1);
-	SIER_SHOW(RDR0_EN, rdr0);
-	SIER_SHOW(TDE1_EN, tde1);
-	SIER_SHOW(TDE0_EN, tde0);
-	SIER_SHOW(ROE1_EN, roe1);
-	SIER_SHOW(ROE0_EN, roe0);
-	SIER_SHOW(TUE1_EN, tue1);
-	SIER_SHOW(TUE0_EN, tue0);
-	SIER_SHOW(TFS_EN, tfs);
-	SIER_SHOW(RFS_EN, rfs);
-	SIER_SHOW(TLS_EN, tls);
-	SIER_SHOW(RLS_EN, rls);
-	SIER_SHOW(RFF1_EN, rff1);
-	SIER_SHOW(RFF0_EN, rff0);
-	SIER_SHOW(TFE1_EN, tfe1);
-	SIER_SHOW(TFE0_EN, tfe0);
-
-	return 0;
-}
-
-static int fsl_ssi_stats_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, fsl_ssi_stats_show, inode->i_private);
-}
-
-static const struct file_operations fsl_ssi_stats_ops = {
-	.open = fsl_ssi_stats_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
-
-static int fsl_ssi_debugfs_create(struct fsl_ssi_private *ssi_private,
-		struct device *dev)
-{
-	ssi_private->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
-	if (!ssi_private->dbg_dir)
-		return -ENOMEM;
-
-	ssi_private->dbg_stats = debugfs_create_file("stats", S_IRUGO,
-			ssi_private->dbg_dir, ssi_private, &fsl_ssi_stats_ops);
-	if (!ssi_private->dbg_stats) {
-		debugfs_remove(ssi_private->dbg_dir);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static void fsl_ssi_debugfs_remove(struct fsl_ssi_private *ssi_private)
-{
-	debugfs_remove(ssi_private->dbg_stats);
-	debugfs_remove(ssi_private->dbg_dir);
-}
-
-#else
-
-static int fsl_ssi_debugfs_create(struct fsl_ssi_private *ssi_private,
-		struct device *dev)
-{
-	return 0;
-}
+	fsl_ssi_dbg_isr(&ssi_private->dbg_stats, sisr);
 
-static void fsl_ssi_debugfs_remove(struct fsl_ssi_private *ssi_private)
-{
+	return IRQ_HANDLED;
 }
 
-#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */
-
 /*
  * Enable/Disable all rx/tx config flags at once.
  */
@@ -1452,7 +1225,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 		goto error_dev;
 	}
 
-	ret = fsl_ssi_debugfs_create(ssi_private, &pdev->dev);
+	ret = fsl_ssi_debugfs_create(&ssi_private->dbg_stats, &pdev->dev);
 	if (ret)
 		goto error_dbgfs;
 
@@ -1522,7 +1295,7 @@ error_dai:
 		imx_pcm_fiq_exit(pdev);
 
 error_pcm:
-	fsl_ssi_debugfs_remove(ssi_private);
+	fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);
 
 error_dbgfs:
 	snd_soc_unregister_component(&pdev->dev);
@@ -1548,7 +1321,7 @@ static int fsl_ssi_remove(struct platform_device *pdev)
 {
 	struct fsl_ssi_private *ssi_private = dev_get_drvdata(&pdev->dev);
 
-	fsl_ssi_debugfs_remove(ssi_private);
+	fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);
 
 	if (!ssi_private->new_binding)
 		platform_device_unregister(ssi_private->pdev);
diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h
index e6b63240a3d71..2e95dd7a21057 100644
--- a/sound/soc/fsl/fsl_ssi.h
+++ b/sound/soc/fsl/fsl_ssi.h
@@ -206,5 +206,64 @@ struct ccsr_ssi {
 #define CCSR_SSI_SACNT_FV		0x00000002
 #define CCSR_SSI_SACNT_AC97EN		0x00000001
 
-#endif
 
+struct device;
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+
+struct fsl_ssi_dbg {
+	struct dentry *dbg_dir;
+	struct dentry *dbg_stats;
+
+	struct {
+		unsigned int rfrc;
+		unsigned int tfrc;
+		unsigned int cmdau;
+		unsigned int cmddu;
+		unsigned int rxt;
+		unsigned int rdr1;
+		unsigned int rdr0;
+		unsigned int tde1;
+		unsigned int tde0;
+		unsigned int roe1;
+		unsigned int roe0;
+		unsigned int tue1;
+		unsigned int tue0;
+		unsigned int tfs;
+		unsigned int rfs;
+		unsigned int tls;
+		unsigned int rls;
+		unsigned int rff1;
+		unsigned int rff0;
+		unsigned int tfe1;
+		unsigned int tfe0;
+	} stats;
+};
+
+void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *ssi_dbg, u32 sisr);
+
+int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev);
+
+void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg);
+
+#else
+
+struct fsl_ssi_dbg {
+};
+
+static inline void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *stats, u32 sisr)
+{
+}
+
+static inline int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg,
+		struct device *dev)
+{
+	return 0;
+}
+
+static inline void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
+{
+}
+#endif  /* ! IS_ENABLED(CONFIG_DEBUG_FS) */
+
+#endif
diff --git a/sound/soc/fsl/fsl_ssi_dbg.c b/sound/soc/fsl/fsl_ssi_dbg.c
new file mode 100644
index 0000000000000..5469ffbc02535
--- /dev/null
+++ b/sound/soc/fsl/fsl_ssi_dbg.c
@@ -0,0 +1,163 @@
+/*
+ * Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions
+ *
+ * Copyright 2014 Markus Pargmann <mpa@pengutronix.de>, Pengutronix
+ *
+ * Splitted from fsl_ssi.c
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#include "fsl_ssi.h"
+
+void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr)
+{
+	if (sisr & CCSR_SSI_SISR_RFRC)
+		dbg->stats.rfrc++;
+
+	if (sisr & CCSR_SSI_SISR_TFRC)
+		dbg->stats.tfrc++;
+
+	if (sisr & CCSR_SSI_SISR_CMDAU)
+		dbg->stats.cmdau++;
+
+	if (sisr & CCSR_SSI_SISR_CMDDU)
+		dbg->stats.cmddu++;
+
+	if (sisr & CCSR_SSI_SISR_RXT)
+		dbg->stats.rxt++;
+
+	if (sisr & CCSR_SSI_SISR_RDR1)
+		dbg->stats.rdr1++;
+
+	if (sisr & CCSR_SSI_SISR_RDR0)
+		dbg->stats.rdr0++;
+
+	if (sisr & CCSR_SSI_SISR_TDE1)
+		dbg->stats.tde1++;
+
+	if (sisr & CCSR_SSI_SISR_TDE0)
+		dbg->stats.tde0++;
+
+	if (sisr & CCSR_SSI_SISR_ROE1)
+		dbg->stats.roe1++;
+
+	if (sisr & CCSR_SSI_SISR_ROE0)
+		dbg->stats.roe0++;
+
+	if (sisr & CCSR_SSI_SISR_TUE1)
+		dbg->stats.tue1++;
+
+	if (sisr & CCSR_SSI_SISR_TUE0)
+		dbg->stats.tue0++;
+
+	if (sisr & CCSR_SSI_SISR_TFS)
+		dbg->stats.tfs++;
+
+	if (sisr & CCSR_SSI_SISR_RFS)
+		dbg->stats.rfs++;
+
+	if (sisr & CCSR_SSI_SISR_TLS)
+		dbg->stats.tls++;
+
+	if (sisr & CCSR_SSI_SISR_RLS)
+		dbg->stats.rls++;
+
+	if (sisr & CCSR_SSI_SISR_RFF1)
+		dbg->stats.rff1++;
+
+	if (sisr & CCSR_SSI_SISR_RFF0)
+		dbg->stats.rff0++;
+
+	if (sisr & CCSR_SSI_SISR_TFE1)
+		dbg->stats.tfe1++;
+
+	if (sisr & CCSR_SSI_SISR_TFE0)
+		dbg->stats.tfe0++;
+}
+
+/* Show the statistics of a flag only if its interrupt is enabled.  The
+ * compiler will optimze this code to a no-op if the interrupt is not
+ * enabled.
+ */
+#define SIER_SHOW(flag, name) \
+	do { \
+		if (CCSR_SSI_SIER_##flag) \
+			seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \
+	} while (0)
+
+
+/**
+ * fsl_sysfs_ssi_show: display SSI statistics
+ *
+ * Display the statistics for the current SSI device.  To avoid confusion,
+ * we only show those counts that are enabled.
+ */
+static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
+{
+	struct fsl_ssi_dbg *ssi_dbg = s->private;
+
+	SIER_SHOW(RFRC_EN, rfrc);
+	SIER_SHOW(TFRC_EN, tfrc);
+	SIER_SHOW(CMDAU_EN, cmdau);
+	SIER_SHOW(CMDDU_EN, cmddu);
+	SIER_SHOW(RXT_EN, rxt);
+	SIER_SHOW(RDR1_EN, rdr1);
+	SIER_SHOW(RDR0_EN, rdr0);
+	SIER_SHOW(TDE1_EN, tde1);
+	SIER_SHOW(TDE0_EN, tde0);
+	SIER_SHOW(ROE1_EN, roe1);
+	SIER_SHOW(ROE0_EN, roe0);
+	SIER_SHOW(TUE1_EN, tue1);
+	SIER_SHOW(TUE0_EN, tue0);
+	SIER_SHOW(TFS_EN, tfs);
+	SIER_SHOW(RFS_EN, rfs);
+	SIER_SHOW(TLS_EN, tls);
+	SIER_SHOW(RLS_EN, rls);
+	SIER_SHOW(RFF1_EN, rff1);
+	SIER_SHOW(RFF0_EN, rff0);
+	SIER_SHOW(TFE1_EN, tfe1);
+	SIER_SHOW(TFE0_EN, tfe0);
+
+	return 0;
+}
+
+static int fsl_ssi_stats_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fsl_ssi_stats_show, inode->i_private);
+}
+
+static const struct file_operations fsl_ssi_stats_ops = {
+	.open = fsl_ssi_stats_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
+{
+	ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
+	if (!ssi_dbg->dbg_dir)
+		return -ENOMEM;
+
+	ssi_dbg->dbg_stats = debugfs_create_file("stats", S_IRUGO,
+			ssi_dbg->dbg_dir, ssi_dbg, &fsl_ssi_stats_ops);
+	if (!ssi_dbg->dbg_stats) {
+		debugfs_remove(ssi_dbg->dbg_dir);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
+{
+	debugfs_remove(ssi_dbg->dbg_stats);
+	debugfs_remove(ssi_dbg->dbg_dir);
+}