psc and spi

psc and spi

[S. Fricke]

[-- Attachment #1: Type: text/plain, Size: 709 bytes --]

Hello friends,

I have on the psc3 the spi-interface of a fpga connected.

   psc3-0 - MOSI
   psc3-1 - MISO
   psc3-2 - CLK
   psc3-3 - SlaveSelect
   psc3-4 - CS-FPGA
   psc3-5 - CS Another device
   psc3-6 - SPI-SEL0
   psc3-7 - SPI-SEL1
   psc3-8/9 - Not connected

Can I use the mpc52xx_psc_spi-driver? And if yes, how I have to use this
driver?  Or must I write a own spi-master/slave thing? Can anyone point me
to a good start-position?

Best regards,
Silvio Fricke

-- 
-- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
   Diplom-Informatiker (FH)
   Linux-Entwicklung
----------------------------------------------------------------------------


[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

Re: psc and spi

[Grant Likely]

On 1/15/08, S. Fricke <silvio.fricke@googlemail.com> wrote:
> Hello friends,
>
> I have on the psc3 the spi-interface of a fpga connected.
>
>    psc3-0 - MOSI
>    psc3-1 - MISO
>    psc3-2 - CLK
>    psc3-3 - SlaveSelect
>    psc3-4 - CS-FPGA
>    psc3-5 - CS Another device
>    psc3-6 - SPI-SEL0
>    psc3-7 - SPI-SEL1
>    psc3-8/9 - Not connected
>
> Can I use the mpc52xx_psc_spi-driver? And if yes, how I have to use this
> driver?  Or must I write a own spi-master/slave thing? Can anyone point me
> to a good start-position?

Yes, you should be able to use the mpc52xx_psc_spi driver.  You'' need
to add the activate_cs and deactivate_cs hooks in your platform code
to activate your SPI CS lines.  You'll also need to set port_config to
have the PSC3 pins in "CODEC3" mode.

Cheers,
g.

>
> Best regards,
> Silvio Fricke
>
> --
> -- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
>    Diplom-Informatiker (FH)
>    Linux-Entwicklung
> ----------------------------------------------------------------------------
>
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
>


-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: psc and spi

[S. Fricke]

[-- Attachment #1: Type: text/plain, Size: 1049 bytes --]

HeHo,

> > I have on the psc3 the spi-interface of a fpga connected.
> >
> > [...]
> >
> > Can I use the mpc52xx_psc_spi-driver? And if yes, how I have to use this
> > driver?  Or must I write a own spi-master/slave thing? Can anyone point me
> > to a good start-position?
> 
> Yes, you should be able to use the mpc52xx_psc_spi driver.  You'' need
> to add the activate_cs and deactivate_cs hooks in your platform code
> to activate your SPI CS lines.  You'll also need to set port_config to
> have the PSC3 pins in "CODEC3" mode.

What is the mostly used way for that?

I think, firstly I must define a "fsl_spi_platform_data"-structure, for use
in a "platform_device"-structure. And now I register this "device" with
"platform_device_register".
Or what is the appropriate way?

Best Regards,
Silvio Fricke

-- 
-- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
   Diplom-Informatiker (FH)
   Linux-Entwicklung
----------------------------------------------------------------------------


[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

Re: psc and spi

[S. Fricke]

[-- Attachment #1: Type: text/plain, Size: 2369 bytes --]

Hello,

> On 1/15/08, S. Fricke <silvio.fricke@googlemail.com> wrote:
> > Hello friends,
> >
> > I have on the psc3 the spi-interface of a fpga connected.
> >
> >    psc3-0 - MOSI
> >    psc3-1 - MISO
> >    psc3-2 - CLK
> >    psc3-3 - SlaveSelect
> >    psc3-4 - CS-FPGA
> >    psc3-5 - CS Another device
> >    psc3-6 - SPI-SEL0
> >    psc3-7 - SPI-SEL1
> >    psc3-8/9 - Not connected
> >
> > Can I use the mpc52xx_psc_spi-driver? And if yes, how I have to use this
> > driver?  Or must I write a own spi-master/slave thing? Can anyone point me
> > to a good start-position?
> 
> Yes, you should be able to use the mpc52xx_psc_spi driver.  You'' need
> to add the activate_cs and deactivate_cs hooks in your platform code
> to activate your SPI CS lines.  You'll also need to set port_config to
> have the PSC3 pins in "CODEC3" mode.

OK, I defined a "fsl_spi_platform_data" for my "activate_cs" and 
"deactivate_cs". This structure I have insert in a "spi_board_info" with
all other mandatory Informations.
When I load "mpc52xx_psc_spi", then I get a "mpc52xx-psc-spi f0002400.spi:
probe called without platform data, no (de)activate_cs function will be
called"

What is wrong in my setup or did I have forget something?

    static void activate_cs(u8 cs, u8 polarity) {/* ... */ }
    static void deactivate_cs(u8 cs, u8 polarity) {/* ...*/}

    static struct fsl_spi_platform_data my_spi_p_data = { 
        .bus_num = 0x2400,
        .max_chipselect = 3,
        .activate_cs = activate_cs,
        .deactivate_cs = deactivate_cs,
    };  
    static struct spi_board_info my_spi_boardinfo = { 
        .bus_num = 0x2400,
        .chip_select = 0,
        .max_speed_hz = 1000,
        .modalias = "my-spi-device",
        .platform_data = &my_spi_p_data,
    };  

    static int __init ipek01_spi_init(void) {
        int ret;
        return fsl_spi_init(&my_spi_boardinfo, 1, activate_cs, deactivate_cs);
    }   
    device_initcall(ipek01_spi_init);

best regards,
Silvio Fricke

-- 
-- S. Fricke ------------------------------------ silvio.fricke@gmail.com --
   Diplom-Informatiker (FH)         TEL:                 (+49)8330-911278
   Linux-Entwicklung             JABBER: silvio@conversation.port1024.net
----------------------------------------------------------------------------


[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]