目前在调试uboot mx6d rmii lan8720a 。
平台： mx6d , uboot-2015-04-r0
硬件： rmii + lan8720 (硬件应该是OK的, linux3.14.52 上面OK,另外也是在L3.0.35上面有验证的)
先说一下目前我已经做得一些改动，RGMII 相关均屏蔽。
mx6sabresd.c 中
1，pin 脚配置 OK
static iomux_v3_cfg_t const enet_pads[] = {
MX6_PAD_ENET_MDIO__ENET_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_MDC__ENET_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_CRS_DV__ENET_RX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_RX_ER__ENET_RX_ER | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_TX_EN__ENET_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_RXD0__ENET_RX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_RXD1__ENET_RX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_TXD0__ENET_TX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET_TXD1__ENET_TX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_GPIO_16__ENET_REF_CLK | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_EIM_D21__GPIO3_IO21 | MUX_PAD_CTRL(NO_PAD_CTRL),
};
2，PIN脚配置调用 及PHY reset
static void setup_iomux_enet(void)
{
imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
// Reset lan8720 PHY
gpio_direction_output(IMX_GPIO_NR(3, 21) , 1);
udelay(150);
gpio_set_value(IMX_GPIO_NR(3, 21), 0);
udelay(200);
gpio_set_value(IMX_GPIO_NR(3, 21), 1);
udelay(100);
}
3，时钟 ，并且在board_init 中调用
static int setup_fec(void)
{
struct iomuxc_base_regs *iomuxc_regs =
(struct iomuxc_base_regs *)IOMUXC_BASE_ADDR;
int ret;
/* set gpr1[21] to select anatop clock */
clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUXC_GPR1_ENET_CLK_SEL_MASK, 1
<< 21);
ret = enable_fec_anatop_clock(0, ENET_50MHZ);
if (ret)
return ret;
return 0;
}
mx6sabre-common.h 中
4，RMII 相关配置
#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 RMII
#define CONFIG_ETHPRIME "FEC"
#define CONFIG_FEC_MXC_PHYADDR 0
#define CONFIG_PHYLIB
#define CONFIG_PHY_SMSC
5，目前现象
a , clk 时钟已经出来了，OK
b, log 如下： （ip 已经是在同一网段）
U-Boot 2015.04-imx_v2015.04_3.14.52_1.1.0_ga+g6cf684a (May 10 2016 - 16:42:24)
CPU: Freescale i.MX6D rev1.2 at 792 MHz
CPU: Temperature 36 C
Reset cause: POR
Board: MX6-SabreSD
I2C: ready
DRAM: 1 GiB
MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
No panel detected: default to Hannstar-XGA
Display: Hannstar-XGA (1024x768)
In: serial
Out: serial
Err: serial
switch to partitions #0, OK
mmc2(part 0) is current device
Net: FEC [PRIME]
Normal Boot
Hit any key to stop autoboot: 0
=>
=>
=> ping 192.168.0.1
Using FEC device
error frame: 0x4ef46dc0 0x00000804
error frame: 0x4ef47400 0x00000804
error frame: 0x4ef47a40 0x00000804
error frame: 0x4f24ba40 0x00000884
error frame: 0x4f24c080 0x00000804
ARP Retry count exceeded; starting again
error frame: 0x4ef46dc0 0x00000804
error frame: 0x4ef47400 0x00000804
error frame: 0x4ef47a40 0x00000804
error frame: 0x4f24ba40 0x00000804
error frame: 0x4f24c080 0x00000884
ARP Retry count exceeded; starting again
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