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

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <fabio.estevam@freescale.com>

mx6qsabresd has a AR8031 Gigabit PHY.

Add support for it. 

Also increase CONFIG_SYS_MALLOC_LEN so that FEC buffer allocation does not fail.

Tested on 1Gbp and 100Mbps networks.

Suggested-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 board/freescale/mx6qsabresd/mx6qsabresd.c |   76 +++++++++++++++++++++++++++++
 include/configs/mx6qsabresd.h             |   17 ++++++-
 2 files changed, 91 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx6qsabresd/mx6qsabresd.c b/board/freescale/mx6qsabresd/mx6qsabresd.c
index c86b51b..c0ea956 100644
--- a/board/freescale/mx6qsabresd/mx6qsabresd.c
+++ b/board/freescale/mx6qsabresd/mx6qsabresd.c
@@ -56,6 +56,36 @@ 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_ENET_MDIO__ENET_MDIO		| MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_ENET_MDC__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),
+	/* AR8031 PHY Reset */
+	MX6Q_PAD_ENET_CRS_DV__GPIO_1_25		| MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static void setup_iomux_enet(void)
+{
+	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
+
+	/* Reset AR8031 PHY */
+	gpio_direction_output(IMX_GPIO_NR(1, 25) , 0);
+	udelay(500);
+	gpio_set_value(IMX_GPIO_NR(1, 25), 1);
+}
+
 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),
@@ -90,6 +120,52 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
+int mx6_rgmii_rework(struct phy_device *phydev)
+{
+	unsigned short val;
+
+	/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x7);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, 0x8016);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x4007);
+
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 0xe);
+	val &= 0xffe3;
+	val |= 0x18;
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, val);
+
+	/* introduce tx clock delay */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x5);
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 0x1e);
+	val |= 0x0100;
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, val);
+
+	return 0;
+}
+
+int board_phy_config(struct phy_device *phydev)
+{
+	mx6_rgmii_rework(phydev);
+
+	if (phydev->drv->config)
+		phydev->drv->config(phydev);
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	int ret;
+
+	setup_iomux_enet();
+
+	ret = cpu_eth_init(bis);
+	if (ret)
+		printf("FEC MXC: %s:failed\n", __func__);
+
+	return 0;
+}
+
 u32 get_board_rev(void)
 {
 	return 0x63000;
diff --git a/include/configs/mx6qsabresd.h b/include/configs/mx6qsabresd.h
index 448ce28..a2d2c65 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 +54,20 @@
 #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_ETHPRIME			"FEC"
+#define CONFIG_FEC_MXC_PHYADDR		1
+
+#define CONFIG_PHYLIB
+#define CONFIG_PHY_ATHEROS
+
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE
 #define CONFIG_CONS_INDEX              1
-- 
1.7.9.5