TI am335x 核心分析----乙太網移植
TI am335x的乙太網移植：
1.1配置MII的管腳
static struct pinmux_config rmii1_pin_mux[]= {
{"mii1_crs.rmii1_crs_dv",OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxer.rmii1_rxer",OMAP_MUX_MODE1|AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_tx_en.rmii1_txen",OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT},
{"mii1_tx_d1.rmii1_txd1",OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT},
{"mii1_txd0.rmii1_txd0",OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT},
{"mii1_rxd1.rmii1_rxd1",OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd0.rmii1_rxd0",OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLDOWN},
{"rmii1_refclk.rmii1_refclk",OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mdio_data.mdio_data",OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mdio_clk.mdio_clk", OMAP_MUX_MODE0| AM33XX_PIN_OUTPUT_PULLUP},
{NULL, 0},
};
static struct pinmux_config rmii2_pin_mux[]= {
{"gpmc_csn3.rmii2_crs_dv",OMAP_MUX_MODE2 |AM33XX_PIN_INPUT_PULLDOWN},
// {"gpmc_wpn.mii2_rxerr", OMAP_MUX_MODE3|AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_wpn.rmii2_rxerr",OMAP_MUX_MODE3 |AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a0.mii2_txen",OMAP_MUX_MODE3 | AM33XX_PIN_OUTPUT},
{"gpmc_a4.mii2_txd1", OMAP_MUX_MODE3| AM33XX_PIN_OUTPUT},
{"gpmc_a5.mii2_txd0", OMAP_MUX_MODE3| AM33XX_PIN_OUTPUT},
{"gpmc_a10.mii2_rxd1",OMAP_MUX_MODE3| AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a11.mii2_rxd0",OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_col.rmii2_refclk",OMAP_MUX_MODE1 |AM33XX_PIN_INPUT_PULLDOWN},
{"mdio_data.mdio_data",OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mdio_clk.mdio_clk", OMAP_MUX_MODE0| AM33XX_PIN_OUTPUT_PULLUP},
{NULL, 0},
};
1.2初始化函式
Setup_general_purpose(void)
{
……
am33xx_cpsw_init(AM33XX_CPSW_MODE_RMII,NULL, NULL);
/* Atheros Tx Clkdelay Phy fixup */
phy_register_fixup_for_uid(AM335X_EVM_PHY_ID, AM335X_EVM_PHY_MASK,
beaglebone_phy_fixup);
……
}
#defineAM335X_EVM_PHY_ID 0x20005c90 //Tbao
staticstruct cpsw_slave_data am33xx_cpsw_slaves[] = {
{
.slave_reg_ofs = 0x200,
.sliver_reg_ofs= 0xd80,
.phy_id = "0:01",
.dual_emac_reserved_vlan= CPSW_PORT_VLAN_SLAVE_0,
//.mac_addr=
},
{
.slave_reg_ofs = 0x300,
.sliver_reg_ofs= 0xdc0,
.phy_id = "0:02",
.dual_emac_reserved_vlan= CPSW_PORT_VLAN_SLAVE_1,
},
};
選擇暫存器的模式：
#defineAM33XX_RMII_MODE_EN ((1 <<0) | (1 << 2) | (1<<6) | (1<<7))
am33xx_cpsw_init()
{
……
struct omap_hwmod *oh;
struct platform_device *pdev;
u32 mac_lo, mac_hi, gmii_sel;
u32 i;
mac_lo = omap_ctrl_readl(TI81XX_CONTROL_MAC_ID0_LO);
mac_hi =omap_ctrl_readl(TI81XX_CONTROL_MAC_ID0_HI);
am33xx_cpsw_slaves[0].mac_addr[0] = mac_hi& 0xFF;
am33xx_cpsw_slaves[0].mac_addr[1] = (mac_hi& 0xFF00) >> 8;
am33xx_cpsw_slaves[0].mac_addr[2] = (mac_hi& 0xFF0000) >> 16;
am33xx_cpsw_slaves[0].mac_addr[3] = (mac_hi& 0xFF000000) >> 24;
am33xx_cpsw_slaves[0].mac_addr[4] = mac_lo& 0xFF;
am33xx_cpsw_slaves[0].mac_addr[5] = (mac_lo& 0xFF00) >> 8;
/* Read MACID0 from eeprom if eFuse MACID isinvalid */
if (!is_valid_ether_addr(am33xx_cpsw_slaves[0].mac_addr)){
for (i = 0; i < ETH_ALEN; i++)
am33xx_cpsw_slaves[0].mac_addr[i]= am33xx_macid0[i];
}
mac_lo =omap_ctrl_readl(TI81XX_CONTROL_MAC_ID1_LO);
mac_hi =omap_ctrl_readl(TI81XX_CONTROL_MAC_ID1_HI);
am33xx_cpsw_slaves[1].mac_addr[0] = mac_hi& 0xFF;
am33xx_cpsw_slaves[1].mac_addr[1] = (mac_hi& 0xFF00) >> 8;
am33xx_cpsw_slaves[1].mac_addr[2] = (mac_hi& 0xFF0000) >> 16;
am33xx_cpsw_slaves[1].mac_addr[3] = (mac_hi& 0xFF000000) >> 24;
am33xx_cpsw_slaves[1].mac_addr[4] = mac_lo& 0xFF;
am33xx_cpsw_slaves[1].mac_addr[5] = (mac_lo& 0xFF00) >> 8;
/* Read MACID1 from eeprom if eFuse MACID isinvalid */
if(!is_valid_ether_addr(am33xx_cpsw_slaves[1].mac_addr)) {
for (i = 0; i < ETH_ALEN; i++)
am33xx_cpsw_slaves[1].mac_addr[i]= am33xx_macid1[i];
}
switch (mode) {
case AM33XX_CPSW_MODE_MII:
gmii_sel = AM33XX_MII_MODE_EN;
break;
case AM33XX_CPSW_MODE_RMII:
gmii_sel = AM33XX_RMII_MODE_EN; // 1100 0101
am33xx_cpsw_slaves[0].phy_if =PHY_INTERFACE_MODE_RMII; //Tbao------
am33xx_cpsw_slaves[1].phy_if =PHY_INTERFACE_MODE_RMII;
break;
case AM33XX_CPSW_MODE_RGMII:
gmii_sel = AM33XX_RGMII_MODE_EN;
am33xx_cpsw_slaves[0].phy_if =PHY_INTERFACE_MODE_RGMII;
am33xx_cpsw_slaves[1].phy_if =PHY_INTERFACE_MODE_RGMII;
break;
default:
return -EINVAL;
}
writel(gmii_sel,AM33XX_CTRL_REGADDR(AM33XX_CONTROL_GMII_SEL_OFFSET));
if (phy_id0 != NULL)
am33xx_cpsw_slaves[0].phy_id =phy_id0;
if (phy_id1 != NULL)
am33xx_cpsw_slaves[1].phy_id =phy_id1;
memcpy(am33xx_cpsw_pdata.mac_addr,
am33xx_cpsw_slaves[0].mac_addr,ETH_ALEN);
oh = omap_hwmod_lookup("mdio");
if (!oh) {
pr_err("could not find cpgmac0hwmod data\n");
return -ENODEV;
}
pdev =omap_device_build("davinci_mdio", 0, oh, &am33xx_cpsw_mdiopdata,
sizeof(am33xx_cpsw_mdiopdata),NULL, 0, 0);
if (IS_ERR(pdev))
pr_err("could not buildomap_device for cpsw\n");
oh = omap_hwmod_lookup("cpgmac0");
if (!oh) {
pr_err("could not find cpgmac0hwmod data\n");
return -ENODEV;
}
pdev = omap_device_build("cpsw", -1,oh, &am33xx_cpsw_pdata,
sizeof(am33xx_cpsw_pdata),NULL, 0, 0);
if (IS_ERR(pdev))
pr_err("could not buildomap_device for cpsw\n");
return 0;
}
……
}
經過以上的移植，乙太網能夠起來。。
2017/09/21 於深圳南山