Re: Query related to MSR(Magnetic Stripe Reader) Device Driver

Priyaranjan Das
2013-01-31T05:39:27Z

Hi Greg,

On Tue, Jan 29, 2013 at 7:03 PM, Greg KH <gregkh@linuxfoundation.org> wrote:
> On Mon, Jan 28, 2013 at 03:25:08PM +0530, Priyaranjan Das wrote:
>> Hi Greg,
>>
>> On Tue, Jan 22, 2013 at 10:06 PM, Greg KH <gregkh@linuxfoundation.org> wrote:
>> > On Tue, Jan 22, 2013 at 03:02:32PM +0530, Priyaranjan Das wrote:
>> >> Hi All,
>> >>
>> >> I am working on MSR(Magnetic Stripe Reader) for a product . I wish to
>> >> know whether any MSR( Magnetic Stripe/card Reader) driver is available
>> >> in the current source or not. I need this for reference. Could anyone
>> >> please help me?
>> >
>> > Most of these types of devices that I have worked with always show up as
>> > a keyboard device (ps/2 pass-through or a USB hid device.) What type of
>> > interface does your device present to the operating system?
>> >
>>
>> The MSR will be a part of a SoC. It is a memory mapped device hence
>> there is no interface like USB.
>
> Ok, that's different. But how will your driver want to communicate the
> reader data to userspace? That will probably determine where you want
> to put it.
>
> I would recommend making it an input device and sending keystrokes that
> you read from the card, so you can properly integrate into userspace
> applications that are used to using a card reader.
>
>> MSR IP contains an ADC which the driver will read and interpret the
>> data. I am planning to write a Driver for the same. Will this driver
>> fall under drivers/mfd/* ?
>
> As per the above, I would think drivers/input/ wouldn't you?
>
> Hope this helps,
>

Thanks for your help!.

Yes, you are right, it should be under drivers/input.
I am trying to prepare the design right now.

Regards,
Priyaranjan