[U-Boot] phy ic isn't reset

[alex]

At 2013-04-18 09:23:48,"Bo Shen" <voice.shen at atmel.com> wrote:
>Hi Alex,
>
>On 4/17/2013 18:29, alex wrote:
>> Hi:
>>    I work on one board based on at9g25evk board now. I find one issue
>> that phy IC isn't reset, so network can't work. Only the different
>> crystal with evk board is connected to PHY IC. I copy the phy-reset part
>> of at9260 to at9g25. It can work now. Please the maintainer of at9gx5
>> check this. The modification I do is as below:
>
>As you mentioned, you use different crystal, please specify this in detail.
S3225A package, 50Mhz crystal oscillator. ocean comonents ltd. ---> can work.
asem series:ASEM1-50.000MHZ-LC-T  ---->can't work.

>
>> +
>> +#ifdef CONFIG_MACB
>> +int at91sam9x5ek_macb_hw_init(void)
>> +{
>> +        struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
>> +        struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
>> +       struct at91_rstc *rstc = (struct at91_rstc *)ATMEL_BASE_RSTC;
>> +       unsigned long erstl;
>> +
>> +        /* Enable EMAC clock */
>> +        writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
>> +
>> +       erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
>> +
>> +       /* Need to reset PHY -> 500ms reset */
>> +       writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(13) |
>> +                       AT91_RSTC_MR_URSTEN, &rstc->mr);
>> +
>> +       writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr);
>> +
>> +       /* Wait for end hardware reset */
>> +       while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL))
>> +               ;
>> +
>> +       /* Restore NRST value */
>> +       writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN,
>> +                       &rstc->mr);
>> +
>> +       at91_macb_hw_init();
>> +}
>> +#endif
>
>On at91sam9g25ek, it don't need this patch. The network work properly.
>
>Btw, please help provide the log information for why not ethernet 
>doesn't work.