kernel with marvell 64360 support

kernel with marvell 64360 support

[Suresh Chandra Mannava]

Hi,

We designed a power-pc 7410 board with galileo mv64360 bridge.
We are interested in porting linux on to that board.

Where can I  download the linux kernel with 64360 (serial, ethernet, PCI 
etc)
drivers.
please provide the pointers for the same.

Regards,
Suresh Chandra Mannava

Re: kernel with marvell 64360 support

[Mark A. Greer]

Suresh Chandra Mannava wrote:

> Hi,
>
> We designed a power-pc 7410 board with galileo mv64360 bridge.
> We are interested in porting linux on to that board.
>
> Where can I  download the linux kernel with 64360 (serial, ethernet, 
> PCI etc)
> drivers.
> please provide the pointers for the same.


You can get the latest code minus 3 patches and the enet driver from the 
latest linux-2.5 tree on bkbits.net/kernel.org. The 3 patches are in the 
linuxppc-embedded mail archive.  AFAIK, the enet driver is queued to go 
into the mainline tree but I don't know when that'll happen.  If you 
need it now, you can contact Dale Farnsworth <dfarnsworth@mvista.com>.

Mark

Re: kernel with marvell 64360 support

[Mark A. Greer]

Mark A. Greer wrote:

> Suresh Chandra Mannava wrote:
>
>> Hi,
>>
>> We designed a power-pc 7410 board with galileo mv64360 bridge.
>> We are interested in porting linux on to that board.
>>
>> Where can I  download the linux kernel with 64360 (serial, ethernet, 
>> PCI etc)
>> drivers.
>> please provide the pointers for the same.
>
>
>
> You can get the latest code minus 3 patches and the enet driver from 
> the latest linux-2.5 tree on bkbits.net/kernel.org. The 3 patches are 
> in the linuxppc-embedded mail archive.  AFAIK, the enet driver is 
> queued to go into the mainline tree but I don't know when that'll 
> happen.  If you need it now, you can contact Dale Farnsworth 
> <dfarnsworth@mvista.com>.


I failed to mention that there is an i2c driver queued to go in at: 
http://archives.andrew.net.au/lm-sensors/msg29471.html

Mark

Marvell 64360, MPSC Serial Console Problem

[Suresh Chandra Mannava]

Dear Mr. Mark,

We designed a board with PPC 7410 and Marvell 64360 bridge.  We  
successfully  ported u-boot and Linux on to this board.

Thanks for your support.

We faced a problem in MPSC serial console part.  The problem is,  in 
Serial console data is received once after 32 characters are typed.

Any thing less than  32 characters  is not  echoed or not transmitted 
till the 32 character count is reached.

After carefully reviewing the code. We found that the receive buffer 
size is initialised to 32 bytes.
We made a small correction in the code by making the receive buffer size 
to 1
rxre->bufsize = 1;

After this modification, we got beautiful serial console working fine.

Here is the part of the code from "mpsc.c"

Function name "mpsc_init_rings"

    for (i = 0; i < MPSC_RXR_ENTRIES; i++) {
        rxre = (struct mpsc_rx_desc *)dp;

    /*    rxre->bufsize = cpu_to_be16(MPSC_RXBE_SIZE);*/ 
        rxre->bufsize = 1;  /* Modified Line*/
        rxre->bytecnt = cpu_to_be16(0);
        rxre->cmdstat = cpu_to_be32(SDMA_DESC_CMDSTAT_O |
                        SDMA_DESC_CMDSTAT_EI |
                        SDMA_DESC_CMDSTAT_F |
                        SDMA_DESC_CMDSTAT_L);
        rxre->link = cpu_to_be32(dp_p + MPSC_RXRE_SIZE);
        rxre->buf_ptr = cpu_to_be32(bp_p);

        dp += MPSC_RXRE_SIZE;
        dp_p += MPSC_RXRE_SIZE;
        bp += MPSC_RXBE_SIZE;
        bp_p += MPSC_RXBE_SIZE;
    }


Once again thank you very much for your support.

Regards,
Suresh Chandra Mannava

Re: Marvell 64360, MPSC Serial Console Problem

[Mark A. Greer]

Suresh Chandra Mannava wrote:

> <snip>
>
> We faced a problem in MPSC serial console part.  The problem is,  in 
> Serial console data is received once after 32 characters are typed.
>
> Any thing less than  32 characters  is not  echoed or not transmitted 
> till the 32 character count is reached.
>
> After carefully reviewing the code. We found that the receive buffer 
> size is initialised to 32 bytes.
> We made a small correction in the code by making the receive buffer 
> size to 1
> rxre->bufsize = 1;

<snip>

Suresh,

I think you fixed a symptom but not the problem.  By default, the rx 
buffers are indeed 32 bytes long (i.e., a cacheline in size).  When 
receiving, the mpsc will generate an interrupt when there is an error, 
when the buffer is full (32 bytes--unlikely if you're typing), or after 
a timeout.  I suspect your timeout value is bogus so you don't get the 
interrupt until you fill the buffer with 32 bytes.  Please compare the 
platform_data that you pass to the mpsc driver to other, working systems 
that use the mpsc (e.g., katana and cpci690).  In particular, look at 
your 'max_idle' value.

Mark

Re: Marvell 64360, MPSC Serial Console Problem

[Suresh Chandra Mannava]

>
>
> Suresh,
>
> I think you fixed a symptom but not the problem.  By default, the rx 
> buffers are indeed 32 bytes long (i.e., a cacheline in size).  When 
> receiving, the mpsc will generate an interrupt when there is an error, 
> when the buffer is full (32 bytes--unlikely if you're typing), or 
> after a timeout.  I suspect your timeout value is bogus so you don't 
> get the interrupt until you fill the buffer with 32 bytes.  Please 
> compare the platform_data that you pass to the mpsc driver to other, 
> working systems that use the mpsc (e.g., katana and cpci690).  In 
> particular, look at your 'max_idle' value.
>
> Mark
>
>

Mr. Mark,

Thank you for your reply. You exactly pointed out the mistake I had done 
with max_idle.
I didn't initialized the mpsc_pdata structure in platform dependent 
file. Now I initialized max_idle =40.
And every thing is working fine.

Still facing some problems with mv64360 giga Ethernet driver. I will 
come back after a little bit of investigation.

Regards,
Suresh Chandra Mannava