In commit cfd4ff6 we implemented part of advisory 1.0.10 (internal delay for RGMII mode not supported). This in turn however requires that we set the tx clock delay feature in the PHY itself.
Signed-off-by: Tom Rini trini@ti.com --- board/ti/am335x/board.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c index b9ac1d5..48e6896 100644 --- a/board/ti/am335x/board.c +++ b/board/ti/am335x/board.c @@ -73,6 +73,11 @@ static inline int board_is_idk(void) return !strncmp(header.config, "SKU#02", 6); }
+static int board_is_gp_evm(void) +{ + return !strncmp("A33515BB", header.name, 8); +} + int board_is_evm_15_or_later(void) { return (!strncmp("A33515BB", header.name, 8) && @@ -466,6 +471,28 @@ int board_eth_init(bd_t *bis) printf("Error %d registering CPSW switch\n", rv); else n += rv; + + /* + * + * CPSW RGMII Internal Delay Mode is not supported in all PVT + * operating points. So we must set the TX clock delay feature + * in the AR8051 PHY. Since we only support a single ethernet + * device in U-Boot, we only do this for the first instance. + */ +#define AR8051_PHY_DEBUG_ADDR_REG 0x1d +#define AR8051_PHY_DEBUG_DATA_REG 0x1e +#define AR8051_DEBUG_RGMII_CLK_DLY_REG 0x5 +#define AR8051_RGMII_TX_CLK_DLY 0x100 + + if (board_is_evm_sk() || board_is_gp_evm()) { + const char *devname; + devname = miiphy_get_current_dev(); + + miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_ADDR_REG, + AR8051_DEBUG_RGMII_CLK_DLY_REG); + miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_DATA_REG, + AR8051_RGMII_TX_CLK_DLY); + } #endif try_usbether: #if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD)