linux-kernel - [PATCH 14/14 v3] Input: atmel_mxt_ts

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Date:	Wed, 18 Apr 2012 21:21:59 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Nick Dyer <nick.dyer@...ev.co.uk>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Benson Leung <bleung@...omium.org>,
	Yufeng Shen <miletus@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>
Subject: [PATCH 14/14 v3] Input: atmel_mxt_ts - parse T6 reports

The normal messages sent after boot or NVRAM update are T6 reports,
containing a status, and the config memory checksum.  Parse them and dump
a useful info message.

This patch tested on an MXT224E.

Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 6077b7c..0590312 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -247,6 +247,7 @@ struct mxt_data {
 	unsigned int max_y;
 
 	/* Cached parameters from object table */
+	u8 T6_reportid;
 	u8 T9_reportid_min;
 	u8 T9_reportid_max;
 };
@@ -560,6 +561,12 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
 		    message.reportid <= data->T9_reportid_max) {
 			mxt_input_touch(data, &message);
 			update_input = true;
+		} else if (message.reportid == data->T6_reportid) {
+			unsigned csum = message.message[1] |
+					(message.message[2] << 8) |
+					(message.message[3] << 16);
+			dev_info(dev, "Status: %02x Config Checksum: %06x\n",
+				 message.message[0], csum);
 		} else {
 			mxt_dump_message(dev, &message);
 		}
@@ -689,6 +696,7 @@ static int mxt_get_object_table(struct mxt_data *data)
 	size_t table_size;
 
 	/* Initialized cached object fields to 0 */
+	data->T6_reportid = 0;
 	data->T9_reportid_min = 0;
 	data->T9_reportid_max = 0;
 
@@ -728,6 +736,9 @@ static int mxt_get_object_table(struct mxt_data *data)
 			 object->instances + 1, min_id, max_id);
 
 		switch (object->type) {
+		case MXT_GEN_COMMAND_T6:
+			data->T6_reportid = min_id;
+			break;
 		case MXT_TOUCH_MULTI_T9:
 			data->T9_reportid_min = min_id;
 			data->T9_reportid_max = max_id;
-- 
1.7.7.3

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