topic Re: smartcard driver for imx6ul in i.MX Processors

smartcard driver for imx6ul

ganesh_k — Mon, 22 Oct 2018 14:51:58 GMT

i m trying to interface the SAM slot(contact) to imx6ul. will you please help me which driver i need to use in this. i tried with imx_sim.c driver, in this

if (devm_request_irq(&pdev->dev, sim->ipb_irq, sim_irq_handler,
0, "mxc_sim_ipb", sim))

i didnt get what is "mxc_sim_ipb", and how to pass it in devicetree,

but IRQ pin is not there to use in this slot.

Please help me out from which driver to use for SAM slot(Smartcard) and which parameters i need to pass it in devicetree.

Thank you

Ganesh.K

Re: smartcard driver for imx6ul

igorpadykov — Mon, 22 Oct 2018 23:36:21 GMT

Hi Ganesh

one can try sim unit test

mxc_sim_test\test - imx-test - i.MX Driver Test Application Software

Best regards
igor
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Re: smartcard driver for imx6ul

ganesh_k — Tue, 23 Oct 2018 10:25:12 GMT

Hi Igor,

Thanks for quick reply.

We running the application on target board and we got below output.

---- Running < ./sam > test ----

atr[0]= 0x0
Receiving timeout
Error when tx/rx:-1

Can you please help us,where we are wrong and please provide test procedure and expected output for sam.

Thank you

Ganesh.K

Re: smartcard driver for imx6ul

igorpadykov — Tue, 23 Oct 2018 11:43:20 GMT

Hi Ganesh

please try to test on i.MX6UL EVK reference board.

Regarding "Receiving timeout" on custom board one can check sim signals

with oscilloscope.

Best regards
igor

Re: smartcard driver for imx6ul

ganesh_k — Mon, 05 Nov 2018 11:43:05 GMT

Hi Igor,

We are using below pinmuxing,its always detecting the card while inserting and removing time,but we are not getting the data.

pinctrl_sim2: sim2grp {
fsl,pins = <

                                MX6UL_PAD_UART3_RX_DATA__SIM2_PORT0_PD           0xb808
                                MX6UL_PAD_ENET2_TX_EN__SIM2_PORT0_CLK            0x31
                                MX6UL_PAD_ENET2_TX_CLK__SIM2_PORT0_RST_B         0xb808
                                MX6UL_PAD_ENET2_RX_ER__SIM2_PORT0_SVEN           0xb808
                                MX6UL_PAD_ENET2_TX_DATA1__SIM2_PORT0_TRXD        0xb809
                                MX6UL_PAD_UART3_TX_DATA__GPIO1_IO24              0x3008

>;
};
};

&sim2 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_sim2>;
        assigned-clocks = <&clks IMX6UL_CLK_SIM_SEL>;
        assigned-clock-parents = <&clks IMX6UL_CLK_SIM_PODF>;
        assigned-clock-rates = <240000000>;
        pinctrl-assert-gpios = <&gpio1 24 GPIO_ACTIVE_LOW>;
        port = <0>;
        sven_low_active;
        status = "okay";
};

While using below pinmux we are able to read the atr values but its says CLA not support,output is like below.

**********************************************************************************

---- Running < ./sam > test ----------

atr[0]= 0x3b atr[1]= 0x95 atr[2]= 0x94 atr[3]= 0x40 atr[4]= 0xff atr[5]= 0xd0 atr[6]= 0x1 atr[7]= 0x75 atr[8]= 0x0 atr[9]= 0x0
CLA not support

pinctrl_sim2: sim2grp {
                        fsl,pins = <
                                MX6UL_PAD_CSI_DATA03__SIM2_PORT1_PD             0xb808
                                MX6UL_PAD_CSI_DATA04__SIM2_PORT1_CLK            0x31
                                MX6UL_PAD_CSI_DATA05__SIM2_PORT1_RST_B          0xb808
                                MX6UL_PAD_CSI_DATA06__SIM2_PORT1_SVEN           0xb808
                                MX6UL_PAD_CSI_DATA07__SIM2_PORT1_TRXD           0xb809
                                MX6UL_PAD_CSI_DATA02__GPIO4_IO23                0x3008

>;
};
};

&sim2 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_sim2>;
        assigned-clocks = <&clks IMX6UL_CLK_SIM_SEL>;
        assigned-clock-parents = <&clks IMX6UL_CLK_SIM_PODF>;
        assigned-clock-rates = <240000000>;
        pinctrl-assert-gpios = <&gpio4 23 GPIO_ACTIVE_LOW>;
        port = <1>;
        sven_low_active;
        status = "okay";
};

what is the difference between PORT0 and PORT1 ?

Any issues with PORT0 ?

Please help me from above.

Thank You

Ganesh.K

Re: smartcard driver for imx6ul

igorpadykov — Tue, 06 Nov 2018 05:52:06 GMT

Hi Ganesh

sim2 signals are used for csi on i.MX6UL EVK so one can check

its usage.

Best regards
igor

Re: smartcard driver for imx6ul

ganesh_k — Tue, 06 Nov 2018 12:05:17 GMT

Hi Igor,

Using ENET2(PORT0) pins, smart card is always detecting without card while inserting and removing time.

Using CSI_DATA(PORT1) pins, its able to detect the smart card.

Can i know the reason, why the ENET2(PORT0) pins are not detecting the card?

And is there any difference between PORT0 and PORT1?

and while running the application we are getting following output for CSI_DATA(PORT1) pins,

*****************************************************************************************************

---- Running < ./sam > test ----------

atr[0]= 0x3b atr[1]= 0x95 atr[2]= 0x94 atr[3]= 0x40 atr[4]= 0xff atr[5]= 0xd0 atr[6]= 0x1 atr[7]= 0x75 atr[8]= 0x0 atr[9]= 0x0
CLA not support

*****************************************************************************************************

Here what is "CLA not support"?

Please help me from above

Thank You

Ganesh.K

Re: smartcard driver for imx6ul

igorpadykov — Wed, 07 Nov 2018 01:26:11 GMT

Hi Ganesh

one can try atatched patch.

CLA is SIM bus protocol, description can be found in documentation of communication protocol for SIM cards

Best regards
igor

Re: smartcard driver for imx6ul

ganesh_k — Tue, 27 Nov 2018 07:16:07 GMT

Hi Igor,

Thank you for your support, it is very helping to us to solve the issues.

we have got the attributes from the card using application as below:

***********************************************************************************************************************************

---- Running < ./sam > test ----------

atr[0]= 0x3b atr[1]= 0x95 atr[2]= 0x94 atr[3]= 0x40 atr[4]= 0xff atr[5]= 0xd0 atr[6]= 0x1 atr[7]= 0x75 atr[8]= 0x0 atr[9]= 0x0

***********************************************************************************************************************************

Now we wanted to do authentication.For this do you have any sample application?

Thank You

Ganesh.K