linux-kernel - Re: [PATCH] Input: trackpoint: add new trackpoint firmware ID

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Date:   Mon, 13 Feb 2017 20:24:35 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andrew Duggan <aduggan@...aptics.com>
Cc:     Aaron Ma <aaron.ma@...onical.com>, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: Re: [PATCH] Input: trackpoint: add new trackpoint firmware ID

On Mon, Feb 13, 2017 at 04:30:02PM -0800, Andrew Duggan wrote:
> On 02/12/2017 02:38 PM, Dmitry Torokhov wrote:
> >On Fri, Feb 10, 2017 at 11:02:21AM +0800, Aaron Ma wrote:
> >>Synaptics add new TP firmware ID: 0x2 and 0x3, for now both lower 2 bits
> >>are indicated as TP. Change the constant to bitwise values.
> >Hmm, I thought IBM/Lenovo owned trackpoint support... Andrew, is it
> >yours now?
> 
> No, it should still be Lenovo's trackpoint.

OK, I see, but are you aware of new firmware with new IDs? I am hesitant
to extend the list for something that hasn't changed for many years.

> 
> Andrew
> 
> >Aaron, what devices have these new trackpoints>?
> >
> >Thanks.
> >
> >>Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
> >>Cc: stable@...r.kernel.org
> >>---
> >>  drivers/input/mouse/trackpoint.c | 3 ++-
> >>  drivers/input/mouse/trackpoint.h | 3 ++-
> >>  2 files changed, 4 insertions(+), 2 deletions(-)
> >>
> >>diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
> >>index 7331084..9ff0f38 100644
> >>--- a/drivers/input/mouse/trackpoint.c
> >>+++ b/drivers/input/mouse/trackpoint.c
> >>@@ -265,7 +265,8 @@ static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *fir
> >>  	if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
> >>  		return -1;
> >>-	if (param[0] != TP_MAGIC_IDENT)
> >>+	/* add new TP ID. */
> >>+	if (!(param[0] & TP_MAGIC_IDENT))
> >>  		return -1;
> >>  	if (firmware_id)
> >>diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
> >>index 5617ed3..8805575 100644
> >>--- a/drivers/input/mouse/trackpoint.h
> >>+++ b/drivers/input/mouse/trackpoint.h
> >>@@ -21,8 +21,9 @@
> >>  #define TP_COMMAND		0xE2	/* Commands start with this */
> >>  #define TP_READ_ID		0xE1	/* Sent for device identification */
> >>-#define TP_MAGIC_IDENT		0x01	/* Sent after a TP_READ_ID followed */
> >>+#define TP_MAGIC_IDENT		0x03	/* Sent after a TP_READ_ID followed */
> >>  					/* by the firmware ID */
> >>+					/* Firmware ID includes 0x1, 0x2, 0x3 */
> >>  /*
> >>-- 
> >>2.9.3
> >>
> 

-- 
Dmitry