[U-Boot] [RFC] mx6qsabresd: Add Ethernet support

[Fabio Estevam]

Add Ethernet support.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
Hi,

As far as I can see mx6qarm2 and mx6qsabresd has the same circuitry related to
AR8031 Ethernet PHY.

However, with this patch I still get 25MHz instead of 125MHz in the AR8031 CLKO
pin and Ethernet is not functional.

Any ideas are appreciated.

Thanks! 

 board/freescale/mx6qsabresd/mx6qsabresd.c |   84 +++++++++++++++++++++++++++++
 include/configs/mx6qsabresd.h             |   13 ++++-
 2 files changed, 95 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx6qsabresd/mx6qsabresd.c b/board/freescale/mx6qsabresd/mx6qsabresd.c
index c86b51b..4f47fd3 100644
--- a/board/freescale/mx6qsabresd/mx6qsabresd.c
+++ b/board/freescale/mx6qsabresd/mx6qsabresd.c
@@ -56,6 +56,24 @@ iomux_v3_cfg_t uart1_pads[] = {
 	MX6Q_PAD_CSI0_DAT11__UART1_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
 };
 
+iomux_v3_cfg_t enet_pads[] = {
+	MX6Q_PAD_KEY_COL1__ENET_MDIO        | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_KEY_COL2__ENET_MDC         | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TXC__ENET_RGMII_TXC  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD0__ENET_RGMII_TD0  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD1__ENET_RGMII_TD1  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD2__ENET_RGMII_TD2  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD3__ENET_RGMII_TD3  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TX_CTL__RGMII_TX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_ENET_REF_CLK__ENET_TX_CLK  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RXC__ENET_RGMII_RXC  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD0__ENET_RGMII_RD0  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD1__ENET_RGMII_RD1  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD2__ENET_RGMII_RD2  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD3__ENET_RGMII_RD3  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL),
+};
+
 iomux_v3_cfg_t usdhc3_pads[] = {
 	MX6Q_PAD_SD3_CLK__USDHC3_CLK   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 	MX6Q_PAD_SD3_CMD__USDHC3_CMD   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
@@ -71,6 +89,11 @@ static void setup_iomux_uart(void)
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 }
 
+static void setup_iomux_enet(void)
+{
+	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
+}
+
 #ifdef CONFIG_FSL_ESDHC
 struct fsl_esdhc_cfg usdhc_cfg[1] = {
 	{USDHC3_BASE_ADDR},
@@ -95,9 +118,70 @@ u32 get_board_rev(void)
 	return 0x63000;
 }
 
+
+#define MII_MMD_ACCESS_CTRL_REG		0xd
+#define MII_MMD_ACCESS_ADDR_DATA_REG	0xe
+#define MII_DBG_PORT_REG		0x1d
+#define MII_DBG_PORT2_REG		0x1e
+
+int fecmxc_mii_postcall(int phy)
+{
+	unsigned short val;
+
+	/*
+	 * Due to the i.MX6Q SabreSD board HW design,there is
+	 * no 125Mhz clock input from SOC. In order to use RGMII,
+	 * We need enable AR8031 ouput a 125MHz clk from CLK_25M
+	 */
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_CTRL_REG, 0x7);
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, 0x8016);
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_CTRL_REG, 0x4007);
+	miiphy_read("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, &val);
+	val &= 0xffe3;
+	val |= 0x18;
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, val);
+
+	/* For the RGMII phy, we need enable tx clock delay */
+	miiphy_write("FEC", phy, MII_DBG_PORT_REG, 0x5);
+	miiphy_read("FEC", phy, MII_DBG_PORT2_REG, &val);
+	val |= 0x0100;
+	miiphy_write("FEC", phy, MII_DBG_PORT2_REG, val);
+
+	miiphy_write("FEC", phy, MII_BMCR, 0xa100);
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	struct eth_device *dev;
+	int ret;
+
+	ret = cpu_eth_init(bis);
+	if (ret) {
+		printf("FEC MXC: %s:failed\n", __func__);
+		return ret;
+	}
+
+	dev = eth_get_dev_by_name("FEC");
+	if (!dev) {
+		printf("FEC MXC: Unable to get FEC device entry\n");
+		return -EINVAL;
+	}
+
+	ret = fecmxc_register_mii_postcall(dev, fecmxc_mii_postcall);
+	if (ret) {
+		printf("FEC MXC: Unable to register FEC mii postcall\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
+	setup_iomux_enet();
 
 	return 0;
 }
diff --git a/include/configs/mx6qsabresd.h b/include/configs/mx6qsabresd.h
index 448ce28..0f8bcf6 100644
--- a/include/configs/mx6qsabresd.h
+++ b/include/configs/mx6qsabresd.h
@@ -33,9 +33,8 @@
 #define CONFIG_REVISION_TAG
 
 /* Size of malloc() pool */
-#define CONFIG_SYS_MALLOC_LEN          CONFIG_ENV_SIZE
+#define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + 2 * 1024 * 1024)
 
-#define CONFIG_ARCH_CPU_INIT
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_MXC_GPIO
 
@@ -55,6 +54,16 @@
 #define CONFIG_CMD_FAT
 #define CONFIG_DOS_PARTITION
 
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_MII
+#define CONFIG_CMD_NET
+#define CONFIG_FEC_MXC
+#define CONFIG_MII
+#define IMX_FEC_BASE			ENET_BASE_ADDR
+#define CONFIG_FEC_XCV_TYPE		RGMII
+#define CONFIG_FEC_MXC_PHYADDR		1
+
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE
 #define CONFIG_CONS_INDEX              1
-- 
1.7.9.5