[OpenWrt-Devel] [PATCH 1/2] ar71xx: fix ethernet packet loss issues on OM5P-AN

[Sven Eckelmann]

The OM5P-AN boards are suffering from ethernet packet loss when booting with
some active POE setups or when switching to Fast Ethernet when previously
booted with Gigabit ethernet attached.

The cause of the problem is that the AR8035 PHYs requires special register
settings to work reliably on these boards. Enable the RGMII TX, RX delays and
disable SmartEE functionality of the AR8035 PHYs. Also enable the RXD and RDV
delay in the ETH_CFG register to fix the issue.

Signed-off-by: Sven Eckelmann <sven at open-mesh.com>
---
Based on a patch from Gabor Juhos <juhosg at openwrt.org> (r40509) for rb91x

 .../linux/ar71xx/files/arch/mips/ath79/mach-om5p.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-om5p.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-om5p.c
index 7f1d811..272e410 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-om5p.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-om5p.c
@@ -16,6 +16,7 @@
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 #include <linux/i2c-gpio.h>
+#include <linux/platform_data/phy-at803x.h>
 
 #include <asm/mach-ath79/ar71xx_regs.h>
 #include <asm/mach-ath79/ath79.h>
@@ -150,6 +151,20 @@ static struct i2c_board_info om5pan_i2c_devs[] __initdata = {
 	},
 };
 
+static struct at803x_platform_data om5p_an_at803x_data = {
+	.disable_smarteee = 1,
+	.enable_rgmii_rx_delay = 1,
+	.enable_rgmii_tx_delay = 1,
+};
+
+static struct mdio_board_info om5p_an_mdio0_info[] = {
+	{
+		.bus_id = "ag71xx-mdio.0",
+		.phy_addr = 7,
+		.platform_data = &om5p_an_at803x_data,
+	},
+};
+
 static void __init om5p_an_setup(void)
 {
 	u8 *art = (u8 *)KSEG1ADDR(0x1fff0000);
@@ -171,10 +186,15 @@ static void __init om5p_an_setup(void)
 	ath79_init_mac(mac, art, 0x02);
 	ath79_register_wmac(art + OM5P_WMAC_CALDATA_OFFSET, mac);
 
-	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0);
+	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
+				   AR934X_ETH_CFG_RXD_DELAY |
+				   AR934X_ETH_CFG_RDV_DELAY);
 	ath79_register_mdio(0, 0x0);
 	ath79_register_mdio(1, 0x0);
 
+	mdiobus_register_board_info(om5p_an_mdio0_info,
+				    ARRAY_SIZE(om5p_an_mdio0_info));
+
 	ath79_init_mac(ath79_eth0_data.mac_addr, art, 0x00);
 	ath79_init_mac(ath79_eth1_data.mac_addr, art, 0x01);
 
-- 
2.1.4
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