linux-kernel - Re: [PATCH 6/6] Input: elantech

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Date:	Thu, 18 Aug 2011 11:30:32 +0800
From:	Wanlong Gao <gaowanlong@...fujitsu.com>
To:	JJ Ding <jj_ding@....com.tw>
CC:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Seth Forshee <seth.forshee@...onical.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Aaron Huang <aaron_huang@....com.tw>,
	Tom Lin <tom_lin@....com.tw>,
	Eric Piel <E.A.B.Piel@...elft.nl>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Chase Douglas <chase.douglas@...onical.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Alessandro Rubini <rubini@...l.unipv.it>
Subject: Re: [PATCH 6/6] Input: elantech - add v3 hardware support

On 08/18/2011 09:57 AM, JJ Ding wrote:
> v3 hardware's packet format is almost identical to v2 (one/three finger touch),
> except when sensing two finger touch, the hardware sends 12 bytes of data.
>
> Signed-off-by: JJ Ding<jj_ding@....com.tw>
> ---
>   Documentation/input/elantech.txt |  104 ++++++++++++++++--
>   drivers/input/mouse/elantech.c   |  218 ++++++++++++++++++++++++++++++++++---
>   drivers/input/mouse/elantech.h   |   11 ++
>   3 files changed, 303 insertions(+), 30 deletions(-)

> +The packet format is exactly the same for two finger touch, except the hardware
> +sends two 6 byte packets. The first packet contains data for the first finger,
> +the second packet has data for the second finger. So for two finger touch a
> +total of 12 bytes are sent.
> diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
> index ddd40eb..e13a719 100644
> --- a/drivers/input/mouse/elantech.c
> +++ b/drivers/input/mouse/elantech.c
> @@ -108,6 +108,16 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
>   			rc = -1;
>   		}
>   		break;
> +
> +	case 3:
> +		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
> +		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
> +		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
> +		    elantech_ps2_command(psmouse, NULL, reg) ||
> +		    elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
> +			rc = -1;
> +		}
Prefer to remove these big brace ?
also with "case 1, case 2 "?
> +		break;
>   	}
>
>   	if (rc)
> @@ -154,6 +164,18 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
>   			rc = -1;
>   		}
>   		break;
> +
> +	case 3:
> +		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
> +		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
> +		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
> +		    elantech_ps2_command(psmouse, NULL, reg) ||
> +		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
> +		    elantech_ps2_command(psmouse, NULL, val) ||
> +		    elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
> +			rc = -1;
> +		}
ditto

--
Thanks
Wanlong Gao
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