LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: XiaoXiao Liu <sliuuxiaonxiao@gmail.com>
To: dmitry.torokhov@gmail.com, pali.rohar@gmail.com
Cc: peter.hutterer@who-t.net, hui.wang@canonical.com,
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
	xiaojian.cao@cn.alps.com, zhangfp1@lenovo.com,
	xiaoxiao.liu-1@cn.alps.com,
	XiaoXiao Liu <sliuuxiaonxiao@gmail.com>
Subject: [PATCH] input: alps-fix the issue alps cs19 trackstick do not work.
Date: Mon, 27 May 2019 05:44:22 -0400	[thread overview]
Message-ID: <20190527094422.7558-1-sliuuxiaonxiao@gmail.com> (raw)

The alps devices which detected to use the ALPS_PROTO_V8 procotol contains
ALPS touchpad and ALPS trackstick.The ALPS_PROTO_V8 procotol do not
support the trackstick device process by default.

When the trackstick was detected to use ALPS_PROTO_V8 procotol,
the v8 process_packet method alps_process_packet_ss4_v2 will reject to
report the data when the device using ALPS_PROTO_V8 procotol is not set
the ALPS_DUALPOINT flag.

The alps cs19 trackstick is detected to use the ALPS_PROTO_V8 procotol
but without ALPS_DUALPOINT flag, the alps driver will not report the
input data. so the trackstick will not work.

solution: when the alps cs19 device detected, set the device
ALPS_DUALPOINT flag,then the input data will be processed.

Signed-off-by: XiaoXiao Liu <sliuuxiaonxiao@gmail.com>
---
 drivers/input/mouse/alps.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 0a6f7ca883e7..a54677cf7474 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -24,7 +24,7 @@
 
 #include "psmouse.h"
 #include "alps.h"
-
+#include "trackpoint.h"
 /*
  * Definitions for ALPS version 3 and 4 command mode protocol
  */
@@ -220,6 +220,23 @@ static bool alps_is_valid_first_byte(struct alps_data *priv,
 	return (data & priv->mask0) == priv->byte0;
 }
 
+static int alps_check_cs19_trackstick(struct psmouse *psmouse)
+{
+	u8 param[2] = { 0 };
+	int error;
+
+	error = ps2_command(&psmouse->ps2dev,
+			    param, MAKE_PS2_CMD(0, 2, TP_READ_ID));
+	if (error)
+		return error;
+
+	if (param[0] == TP_VARIANT_ALPS && param[1] & 0x20) {
+		psmouse_warn(psmouse, "It is alps cs19 trackstick");
+		return 0;
+	}
+	return -1;
+}
+
 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 				int left, int right, int middle)
 {
@@ -2568,8 +2585,12 @@ static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
 			alps_exit_command_mode(psmouse);
 			ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 
-			if (reg_val == 0x0C || reg_val == 0x1D)
+			if (reg_val == 0x0C || reg_val == 0x1D) {
+				is_dual = true;
+			} else if (alps_check_cs19_trackstick(psmouse) == 0) {
+				//For support Thinkpad CS19 TrackStick
 				is_dual = true;
+			}
 		}
 	}
 
-- 
2.20.1


             reply	other threads:[~2019-05-27  9:44 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-27  9:44 XiaoXiao Liu [this message]
2019-05-27 10:09 ` Pali Rohár
2019-05-28  1:37   ` 答复: " Xiaoxiao Liu
2019-05-28  7:18     ` Pali Rohár
2019-05-28  7:55       ` 答复: " Xiaoxiao Liu
2019-06-10  9:20         ` Xiaoxiao Liu
2019-06-10 10:03           ` Xiaoxiao Liu
2019-06-10 10:43             ` Pali Rohár
2019-06-11  3:05               ` 答复: " Xiaoxiao Liu
2019-06-11  3:23                 ` Hui Wang
2019-06-11  4:32                   ` Hui Wang
2019-06-11  7:23                     ` Pali Rohár
2019-06-11 17:07                       ` dmitry.torokhov
2019-06-11 17:17                         ` Pali Rohár
2019-06-11 17:32                           ` dmitry.torokhov
2019-06-11 17:38                             ` Pali Rohár
2019-06-11 17:45                               ` dmitry.torokhov
2019-06-17  1:29                               ` 答复: " Xiaoxiao Liu
2019-06-17  7:49                                 ` Pali Rohár
2019-06-18  8:19                                   ` Hui Wang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190527094422.7558-1-sliuuxiaonxiao@gmail.com \
    --to=sliuuxiaonxiao@gmail.com \
    --cc=dmitry.torokhov@gmail.com \
    --cc=hui.wang@canonical.com \
    --cc=linux-input@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pali.rohar@gmail.com \
    --cc=peter.hutterer@who-t.net \
    --cc=xiaojian.cao@cn.alps.com \
    --cc=xiaoxiao.liu-1@cn.alps.com \
    --cc=zhangfp1@lenovo.com \
    --subject='Re: [PATCH] input: alps-fix the issue alps cs19 trackstick do not work.' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).