DP83TC811S-Q1: sleep mode questions

Hi Betty,

To clarify, customer wants to completely power down the PHY before setting the device in sleep mode? Does this mean they want the device to power-on in a sleep mode? Or are they just looking for a way to put the device to sleep and then re-wake the device?

Thank you,

Nikhil

Hi Nikhil,

Are they just looking for a way to put the device to sleep and then re-wake the device --yes, but now they completely power down the PHY. So, customer have concer about this.

what's your suggestions and does it will affact PHY communication?

thanks,

Hi Betty,

I am working in the same team as Nikhil. He is out of office currently but he will get back to you by Tuesday.

-Regards

Aniruddha

hi team:
1 we have a file operation functions  like dp83811_suspend() and dp83811_resume() at dt83811.c driver files. But they both are empty.

static struct phy_driver dp83811_driver[] = {
    {
            .flags =  PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
        .phy_id = DP83TC811_PHY_ID,
        .phy_id_mask = 0xfffffff0,
        .name = "TI DP83TC811",
        /* PHY_BASIC_FEATURES */
        .config_init = dp83811_config_init,
        .config_aneg = dp83811_config_aneg,
        .soft_reset = dp83811_phy_reset,
        .get_wol = dp83811_get_wol,
        .set_wol = dp83811_set_wol,
        .read_status        = genphy_read_status,
        .ack_interrupt = dp83811_ack_interrupt,
        .config_intr = dp83811_config_intr,
        .suspend = dp83811_suspend,
        .resume = dp83811_resume,
     },
};

static int dp83811_suspend(struct phy_device *phydev)
{
        //printk("###########%s################\n",__func__);
        return 0;
}

static int dp83811_resume(struct phy_device *phydev)
{
        //printk("###########%s################\n",__func__);
        return 0;
        //genphy_resume(phydev);
    /*
        value = phy_read_mmd(phydev, DP83811_DEVADDR,
                     MII_DP83811_WOL_CFG);
        printk("====before====%x=======\n",value);
        value |= DP83811_WOL_CLR_INDICATION;
    phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
                  value);
        printk("====after====%x=======\n",value);
*/
        //phy_set_bits_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
    //         DP83811_WOL_CLR_INDICATION);
//    return 0;
}

2 pre-sleep :our externel MCU  will cut off DP83811 power-supply .PIN22: VDDIO.

3 pre-wake-up: our externel MCU  will power on PIN22: VDDIO again .

4 why we asked MCU to do that :  we  are not woken up from Ethernet communication but CAN bus or hardware line IGN ON(crank on) .   

5 which things makes me can't sleep well ?  after sleep  wake-up action, Ethernet communication can not to be create (not always but high frequency),some times the  emac.ko is dead : adb shell ifconfig eth0  and the ADB terminal  gets stuck and dead.

Hi Betty,

We are looking into this issue and will provide feedback by Tuesday next week.

Thank you,

Nikhil

Hi Betty,

Can you confirm that this is from our latest driver found under the link below?

Thank you,

Nikhil

hi team :

1 Our target is to find out why it cannot ping to another net point when err had happen. The code was compared by us .They doesn't have any meaningful difference.

2 we written a bash script to watch Ethernet connection status.

2.1  do you have some tips to complete me to know which one is unreachable:  

2.1.1 our IP： 172.16.0.97  target IP：172.16.0.99 

 IF PING  172.16.0.99   timeout  : THEN   # means Destination Host Unreachable

            IF   PING 127.0.0.1    OK   #means TCP/IP protocol is OK 

                     IF PING our self  is OK  #means  loop back is OK  

                     then :conclusion :err must caused by the another one ,not us 

.......
 please fix us to locate the err :Destination Host Unreachable

We looking forward to hearing from you soon

Hi Betty,

We are looking into this issue and will provide an update by Friday this week.

Thank you,

Nikhil

Hi Betty,

I have reached out to the appropriate party and will provide additional feedback when available.

Thank you,

Nikhil

Hi Betty,

Are you able to share a schematic? I would like to check that there are no issues with the PHY itself.

Thank you,

Nikhil

hi team :

1 can you share any other ideas  to us ?

thanks

Hello,

Per previous reply, are you able to share a schematic at this time?

Thank you,

Nikhil

hi team:

1 we have used that schematic for 1 year.

2 it had recommend by your TI  consult team before.

thanks

Hello,

Thanks for providing the schematic. The original issue involved configuring the PHY for disable mode, by holding the PHY Enable pin low until the device should wake up. Is this ping error seen after power up or after returning the PHY to normal operation, out of disable mode? When and how often is ping error seen?

Thank you,

Nikhil