linux-kernel - [RFC PATCH v3 02/14] ACPI/EC: Add detailed command/query debugging information.

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Date:	Mon, 21 Jul 2014 14:05:12 +0800
From:	Lv Zheng <lv.zheng@...el.com>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>
Cc:	Lv Zheng <lv.zheng@...el.com>, Lv Zheng <zetalog@...il.com>,
	<linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org
Subject: [RFC PATCH v3 02/14] ACPI/EC: Add detailed command/query debugging information.

Developers really don't need to translate EC commands in mind. This patch
adds detailed debugging information for the EC commands.
The address can be found in the follow-up sequential EC_DATA(W) accesses,
thus this patch also removes some of the redundant address information.

Signed-off-by: Lv Zheng <lv.zheng@...el.com>
---
 drivers/acpi/ec.c |   29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 28ce2cd..54bebbb 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -175,6 +175,27 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 	outb(data, ec->data_addr);
 }
 
+#ifdef DEBUG
+static const char *acpi_ec_cmd_string(u8 cmd)
+{
+	switch (cmd) {
+	case 0x80:
+		return "RD_EC";
+	case 0x81:
+		return "WR_EC";
+	case 0x82:
+		return "BE_EC";
+	case 0x83:
+		return "BD_EC";
+	case 0x84:
+		return "QR_EC";
+	}
+	return "UNKNOWN";
+}
+#else
+#define acpi_ec_cmd_string(cmd)		"UNDEF"
+#endif
+
 static int ec_transaction_completed(struct acpi_ec *ec)
 {
 	unsigned long flags;
@@ -302,16 +323,16 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
 	}
 	/* following two actions should be kept atomic */
 	ec->curr = t;
-	pr_debug("***** transaction started (cmd=0x%02x, addr=0x%02x) *****\n",
-		 t->command, t->wdata ? t->wdata[0] : 0);
+	pr_debug("***** Command(%s) started *****\n",
+		 acpi_ec_cmd_string(t->command));
 	start_transaction(ec);
 	if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
 		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
 	spin_unlock_irqrestore(&ec->lock, tmp);
 	ret = ec_poll(ec);
 	spin_lock_irqsave(&ec->lock, tmp);
-	pr_debug("***** transaction stopped (cmd=0x%02x, addr=0x%02x) *****\n",
-		 t->command, t->wdata ? t->wdata[0] : 0);
+	pr_debug("***** Command(%s) stopped *****\n",
+		 acpi_ec_cmd_string(t->command));
 	ec->curr = NULL;
 unlock:
 	spin_unlock_irqrestore(&ec->lock, tmp);
-- 
1.7.10

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