[PATCH] i2c-viapro: Improve register dump

Improve the register dump used to debug the i2c-viapro driver. The
original dump was missing the HSTSTS register and the block data
buffer.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/i2c/busses/i2c-viapro.c |   38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

1 files changed, 30 insertions, 8 deletions

diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index a89a21264d37..c1c9eb1d714f 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -104,6 +104,30 @@ static struct i2c_adapter vt596_adapter;
 #define FEATURE_I2CBLOCK        (1<<0)
 static unsigned int vt596_features;
 
+#ifdef DEBUG
+static void vt596_dump_regs(const char *msg, u8 size)
+{
+        dev_dbg(&vt596_adapter.dev, "%s: STS=%02x CNT=%02x CMD=%02x ADD=%02x "
+                "DAT=%02x,%02x\n", msg, inb_p(SMBHSTSTS), inb_p(SMBHSTCNT),
+                inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
+                inb_p(SMBHSTDAT1));
+
+        if (size == VT596_BLOCK_DATA
+         || size == VT596_I2C_BLOCK_DATA) {
+                int i;
+
+                dev_dbg(&vt596_adapter.dev, "BLK=");
+                for (i = 0; i < I2C_SMBUS_BLOCK_MAX / 2; i++)
+                        printk("%02x,", inb_p(SMBBLKDAT));
+                printk("\n");
+                dev_dbg(&vt596_adapter.dev, "    ");
+                for (; i < I2C_SMBUS_BLOCK_MAX - 1; i++)
+                        printk("%02x,", inb_p(SMBBLKDAT));
+                printk("%02x\n", inb_p(SMBBLKDAT));
+        }
+}
+#endif
+
 /* Return -1 on error, 0 on success */
 static int vt596_transaction(u8 size)
 {
@@ -111,10 +135,9 @@ static int vt596_transaction(u8 size)
         int result = 0;
         int timeout = 0;
 
-        dev_dbg(&vt596_adapter.dev, "Transaction (pre): CNT=%02x, CMD=%02x, "
-                "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
-                inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
-                inb_p(SMBHSTDAT1));
+#ifdef DEBUG
+        vt596_dump_regs("Transaction (pre)", size);
+#endif
 
         /* Make sure the SMBus host is ready to start transmitting */
         if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
@@ -169,10 +192,9 @@ static int vt596_transaction(u8 size)
         if (temp & 0x1F)
                 outb_p(temp, SMBHSTSTS);
 
-        dev_dbg(&vt596_adapter.dev, "Transaction (post): CNT=%02x, CMD=%02x, "
-                "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
-                inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
-                inb_p(SMBHSTDAT1));
+#ifdef DEBUG
+        vt596_dump_regs("Transaction (post)", size);
+#endif
 
         return result;
 }