Re: [RFC][PATCH] USB touch screen driver, all-in-one

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Tue, 2006-03-14 09:10:13 +0800, Lanslott Gish <lanslott.gish@gmail.com> wrote:
> i fixed some codes and add swap_x & swap_y functions.
> and test your patch passed for my touchset hrdware.
> here is the patch only for your usbtouchscreen.c
> could you help to apply this?
> thank you.
> 
> Regards,
> 
> Lanslott Gish
> 
> ==============================================================
> --- linux-2.6.16-rc6.patched/drivers/usb/input/usbtouchscreen.c
> +++ linux-2.6.16-rc6/drivers/usb/input/usbtouchscreen.c
> @@ -224,13 +224,24 @@
>   * PanJit Part
>   */
>  #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
> +
> +static int swap_x;
> +module_param(swap_x, bool, 0644);
> +MODULE_PARM_DESC(swap_x, "If set X axe is swapped before XY swapped.");
> +static int swap_y;
> +module_param(swap_y, bool, 0644);
> +MODULE_PARM_DESC(swap_y, "If set Y axe is swapped before XY swapped.");
> +
>  static int panjit_read_data(char *pkt, int *x, int *y, int *touch, int *press)
>  {
> -       *x = pkt[1] | (pkt[2] << 8);
> -       *y = pkt[3] | (pkt[4] << 8);
> +       *x = (pkt[1] & 0x0F) | ((pkt[2]& 0xFF) << 8);
> +       *y = (pkt[3] & 0x0F) | ((pkt[4]& 0xFF) << 8);
>         *touch = (pkt[0] & 0x01) ? 1 : 0;
> 
> -       return 1;
> +	if(swap_x) *x = *x ^ 0x0FFF;
> +	if(swap_y) *y = *y ^ 0x0FFF;
> +
> + 	return 1;
>  }
>  #endif
> 

Um, I think it's generally a good idea to allow this, but I'd say this
should go into the common code part using the pre-known number range.

MfG, JBG

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