2010-10-20 09:50:07     Using SPORT 0 and SPORT 1 simultaneously in BF537

2010-10-20 09:50:07     Using SPORT 0 and SPORT 1 simultaneously in BF537

Shyam sundar (INDIA)

Message: 94781   

Hello world,

I want to use SPORT 0 and SPORT 1 simultaneously in the userspace for the BF537 processor!!

I have enabled the SPORT usage in raw mode. How can utilise both SPORTS to work simultaneously?

Can I get any clue?

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2010-10-20 14:34:36     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Mike Frysinger (UNITED STATES)

Message: 94784   

there are two device nodes in /dev.  one for each sport.

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2010-10-21 00:38:35     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Shyam sundar (INDIA)

Message: 94789   

Hi Mike,

I want to use both the SPORT in auto buffer mode with DMA channels,where in I can copy the data from SPORT dma rx buffer into the userspace memory whenever I do get receieve data and put the data into SPORT dma tx buffer.I hope I am clear in my question.I want to clear the DMA_IRQ_STATUS bit manually in the userspace so that I can process on the data. The read and write operations for SPORT are in blocked mode,because of which I am not able to use SPORT0 and SPORT1 simultaneously.

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2010-10-21 00:54:08     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Sonic Zhang (CHINA)

Message: 94791   

You didn't describe you use case clearly. Why do you need to use both simultaneously?

The simple bfin_sport.c driver is not designed for concurrently reading/writing. You have to enhance this function.

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2010-10-21 03:41:53     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Shyam sundar (INDIA)

Message: 94807   

Hi Sonic Zhang,

I do need one SPORT interface for recording and transmitting voice samples and other SPORT interface for voice communication for a modem.So from that point of view I need to have both SPORT working simultaneously.Trying to work around the sport driver!!

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2010-10-22 05:56:01     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Shyam sundar (INDIA)

Message: 94868   

Hello world,

I am trying to use SPORT 0 in dma mode and SPORT 1 in non-dma mode simultaneously

Currently, I dont want to do any transmit or receive on SPORT 1.I just want SPORT 1  clock generated which I can feed it to a codec(The codec should have been given the clock externally,but unfortunately its connected to SPORT 1 serial clock).I will be transmitting data to codec using SPORT 0

In the uClinux-dist/linux-2.6.x/drivers/char/bfin_sport.c file, I tried to add these statements

    case 2:

        if (copy_from_user(&config, (void *)arg, sizeof(config)))

            return -EFAULT;

        if (sport_configure(dev, &config) < 0)

            return -EFAULT;

        dev->regs->tcr1 |= TSPEN;

        break;

And commented the routines in

static irqreturn_t sport_tx_handler(int irq, void *dev_id) and  static irqreturn_t sport_rx_handler(int irq, void *dev_id),ie I am just returning from the interrupt handler without doing anything.

I do get sport 1 status error: TUVF

Can I get any help regarding this?

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2010-11-01 02:09:09     Re: Using SPORT 0 and SPORT 1 simultaneously in BF537

Shyam sundar (INDIA)

Message: 95431   

Finally was able to make things work!

I modified the sport driver and just configured SPORT1 in autobuffer mode.

Thanks a lot for the support !!