[OpenWrt-Devel] [PATCH][ar71xx] Mikrotik Routerboard RB2011 switch fix

[David Hutchison]

Hello,

Can you try: ath79_eth0_pll_data.pll_1000 = 0x6f0000000;

This is the value I originally found on the 951G, I tried to toggle as
many bits as possible and narrow down from there. John Crispin found
some documentation and we narrowed it down to 0x3e000000 for the 951G.
He is actually working on a patch that will grab the correct
ath79_eth0_pll_data.pll_1000 value from the bootloader. That way this
becomes dynamic. I do not know the progress he has made on it.

http://comments.gmane.org/gmane.comp.embedded.openwrt.devel/28589

Here is our original thread, where John posted the relevant datasheet.
You can take the same approach we did, and narrow down to find your
correct bits.

It may also be easier to wait for his patch where he will dynamically set it.

Hope this helps,

-- Davey

On Tue, Dec 23, 2014 at 11:23 AM, Matt Lee <mattlee2nix at gmail.com> wrote:
> Hi Chris,
>
>>This patch is the same as the Routerboard 951G fix, I've built this
>>and tested it on my rb-2011uias-2hnd.  However we should check that it
>>also works on other/older RB2011 routers which did work OK with the
>>unpatched code.
>>
>>diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
>>b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
>>index b73fae6..951ab94 100644
>>--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
>>+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
>>@@ -270,6 +270,7 @@ static int __init rb2011_setup(u32 flags)
>>        rb2011_nand_init();
>>
>>        ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
>>+                                   AR934X_ETH_CFG_RXD_DELAY |
>>                                   AR934X_ETH_CFG_SW_ONLY_MODE);
>>
>>        ath79_register_mdio(1, 0x0);
>>@@ -283,7 +284,7 @@ static int __init rb2011_setup(u32 flags)
>>        ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
>>        ath79_eth0_data.phy_mask = BIT(0);
>>        ath79_eth0_data.mii_bus_dev = &ath79_mdio0_device.dev;
>>-       ath79_eth0_pll_data.pll_1000 = 0x06000000;
>>+       ath79_eth0_pll_data.pll_1000 = 0x3e000000;
>>
>>        ath79_register_eth(0);
>>
>>--
>>Chris Green
> This patch is not working correctly for me on the 2011UiAS-2HnD.  Many
> packets are dropped, and I can see many FCS Errors and RxBadByte.
>
> root at OpenWrt:/# swconfig dev ag71xx-mdio.0 port 0 show
> Port 0:
>         mib: Port 0 MIB counters
> RxBroad     : 8
> RxPause     : 0
> RxMulti     : 15
> RxFcsErr    : 800
> RxAlignErr  : 0
> RxRunt      : 0
> RxFragment  : 0
> Rx64Byte    : 7
> Rx128Byte   : 17323
> Rx256Byte   : 6
> Rx512Byte   : 9
> Rx1024Byte  : 0
> Rx1518Byte  : 0
> RxMaxByte   : 0
> RxTooLong   : 0
> RxGoodByte  : 1145334
> RxBadByte   : 65266
> RxOverFlow  : 0
> Filtered    : 11
> TxBroad     : 244
> TxPause     : 0
> TxMulti     : 170
> TxUnderRun  : 0
> Tx64Byte    : 21
> Tx128Byte   : 360
> Tx256Byte   : 20
> Tx512Byte   : 44
> Tx1024Byte  : 14459
> Tx1518Byte  : 3
> TxMaxByte   : 5683
> TxOverSize  : 0
> TxByte      : 16836688
> TxCollision : 0
> TxAbortCol  : 0
> TxMultiCol  : 0
> TxSingleCol : 0
> TxExcDefer  : 0
> TxDefer     : 0
> TxLateCol   : 0
>         pvid: 0
>         link: port:0 link:up speed:1000baseT full-duplex txflow rxflow
>
> How can we determine the right value for the  ath79_eth0_pll_data.pll_1000 ?
>
> -matt
>
>
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