diff options
Diffstat (limited to 'board/ti/am335x/board.c')
| -rw-r--r-- | board/ti/am335x/board.c | 27 |
1 files changed, 27 insertions, 0 deletions
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) |