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-rw-r--r--sound/soc/fsl/fsl_ssi_dbg.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_ssi_dbg.c b/sound/soc/fsl/fsl_ssi_dbg.c
new file mode 100644
index 000000000000..5469ffbc0253
--- /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);
+}