From: Tom Warren twarren@nvidia.com

This is a WAR for DHCP failure after rebooting from the L4T kernel. The r8169.c kernel driver is setting bit 19 of the rt816x HW register 0xF0, which goes by FuncEvent and MISC in various driver source/datasheets. That bit is called RxDv_Gated_En in the r8169.c kernel driver. Clear it here at the end of probe to ensure that U-Boot can get an IP assigned via DHCP.

Signed-off-by: Tom Warren twarren@nvidia.com --- drivers/net/rtl8169.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/drivers/net/rtl8169.c b/drivers/net/rtl8169.c index 5ccdfdd..ff89e28 100644 --- a/drivers/net/rtl8169.c +++ b/drivers/net/rtl8169.c @@ -237,6 +237,9 @@ enum RTL8169_register_content {

/*_TBICSRBit*/ TBILinkOK = 0x02000000, + + /* FuncEvent/Misc */ + RxDv_Gated_En = 0x80000, };

static struct { @@ -1207,6 +1210,19 @@ static int rtl8169_eth_probe(struct udevice *dev) return ret; }

+ /* + * WAR for DHCP failure after rebooting from kernel. + * Clear RxDv_Gated_En bit which was set by kernel driver. + * Without this, U-Boot can't get an IP via DHCP. + * Register (FuncEvent, aka MISC) and RXDV_GATED_EN bit are from + * the r8169.c kernel driver. + */ + + u32 val = RTL_R32(FuncEvent); + debug("%s: FuncEvent/Misc (0xF0) = 0x%08X\n", __func__, val); + val &= ~RxDv_Gated_En; + RTL_W32(FuncEvent, val); + return 0; }

From: Tom Warren twarren@nvidia.com

This allows the user to set $serverip in the environment before executing a DHCP request. If they do, U-Boot will use that IP rather than using the IP in the DHCP response.

Signed-off-by: Tom Warren twarren@nvidia.com Acked-by: Stephen Warren swarren@nvidia.com --- configs/e2220-1170_defconfig | 1 + configs/p2371-0000_defconfig | 1 + configs/p2371-2180_defconfig | 1 + configs/p2571_defconfig | 1 + configs/p2771-0000-000_defconfig | 1 + configs/p2771-0000-500_defconfig | 1 + 6 files changed, 6 insertions(+)

diff --git a/configs/e2220-1170_defconfig b/configs/e2220-1170_defconfig index 1639040..951ed1d 100644 --- a/configs/e2220-1170_defconfig +++ b/configs/e2220-1170_defconfig @@ -43,3 +43,4 @@ CONFIG_CI_UDC=y CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_USB_HOST_ETHER=y CONFIG_USB_ETHER_ASIX=y +CONFIG_BOOTP_PREFER_SERVERIP=y diff --git a/configs/p2371-0000_defconfig b/configs/p2371-0000_defconfig index 2070199..7081719 100644 --- a/configs/p2371-0000_defconfig +++ b/configs/p2371-0000_defconfig @@ -44,3 +44,4 @@ CONFIG_CI_UDC=y CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_USB_HOST_ETHER=y CONFIG_USB_ETHER_ASIX=y +CONFIG_BOOTP_PREFER_SERVERIP=y diff --git a/configs/p2371-2180_defconfig b/configs/p2371-2180_defconfig index 8c808ae..c70217c 100644 --- a/configs/p2371-2180_defconfig +++ b/configs/p2371-2180_defconfig @@ -52,3 +52,4 @@ CONFIG_CI_UDC=y CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_USB_HOST_ETHER=y CONFIG_USB_ETHER_ASIX=y +CONFIG_BOOTP_PREFER_SERVERIP=y diff --git a/configs/p2571_defconfig b/configs/p2571_defconfig index 721c5c5..43c24b8 100644 --- a/configs/p2571_defconfig +++ b/configs/p2571_defconfig @@ -44,3 +44,4 @@ CONFIG_CI_UDC=y CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_USB_HOST_ETHER=y CONFIG_USB_ETHER_ASIX=y +CONFIG_BOOTP_PREFER_SERVERIP=y diff --git a/configs/p2771-0000-000_defconfig b/configs/p2771-0000-000_defconfig index e347a77..8bf8419 100644 --- a/configs/p2771-0000-000_defconfig +++ b/configs/p2771-0000-000_defconfig @@ -37,3 +37,4 @@ CONFIG_SYS_NS16550=y CONFIG_USB=y CONFIG_DM_USB=y CONFIG_POSITION_INDEPENDENT=y +CONFIG_BOOTP_PREFER_SERVERIP=y diff --git a/configs/p2771-0000-500_defconfig b/configs/p2771-0000-500_defconfig index 0803b26..1f40333 100644 --- a/configs/p2771-0000-500_defconfig +++ b/configs/p2771-0000-500_defconfig @@ -37,3 +37,4 @@ CONFIG_SYS_NS16550=y CONFIG_USB=y CONFIG_DM_USB=y CONFIG_POSITION_INDEPENDENT=y +CONFIG_BOOTP_PREFER_SERVERIP=y