i.MX ProcessorsのトピックRe: i.mx 35 UART using SDMA

i.mx 35 UART using SDMA

sridharlakkidi — Wed, 26 Mar 2014 22:09:58 GMT

Hello All,

Porting UART software from Linux 2.6 to Linux 3.2 kernel, which uses SDMA APIs(mentioned below) . I do see a lot of interfaces are changed in 3.2 kernel . I am looking some information how to fulfill below interfaces.

Linux 2.6 interfaces

----------------------

mxc_dma_request -- Not there in Linux 3.2 kernel

mxc_dma_config -- Not there in Linux 3.2 kernel

mxc_dma_callback_set -- Not there in Linux 3.2 kernel

mxc_dma_enable -- Not there in Linux 3.2 kernel

Can any one let me know where can i find patch for this interfaces ? What types of interfaces i need to use to get similar functionality.

Re: i.mx 35 UART using SDMA

fabio_estevam — Thu, 27 Mar 2014 00:03:17 GMT

I would suggest you to try a more recent kernel such as 3.13.7.

The sdma driver is available at drivers/dma/imx-sdma.c

Regards,

Fabio Estevam

Re: i.mx 35 UART using SDMA

sridharlakkidi — Thu, 27 Mar 2014 15:14:54 GMT

Hi Fabio,

I have looked in to the 3.13.7 Kernel version. Seems like it also have same API, but not the API's mentioned above. I trying to find out how to fill the structure elements sdma_engine.

Any one have sample application that uses SDMA driver for I.Mx35.

Thanks in advance.