eth.c
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/*
* Ethernet specific code for CompuLab CL-SOM-AM57x module
*
* (C) Copyright 2016 CompuLab, Ltd. http://compulab.co.il/
*
* Author: Uri Mashiach <uri.mashiach@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <cpsw.h>
#include <miiphy.h>
#include <asm/gpio.h>
#include <asm/arch/sys_proto.h>
#include "../common/eeprom.h"
static void cpsw_control(int enabled)
{
/* VTP can be added here */
}
static struct cpsw_slave_data cl_som_am57x_cpsw_slaves[] = {
{
.slave_reg_ofs = 0x208,
.sliver_reg_ofs = 0xd80,
.phy_addr = 0,
.phy_if = PHY_INTERFACE_MODE_RMII,
},
{
.slave_reg_ofs = 0x308,
.sliver_reg_ofs = 0xdc0,
.phy_addr = 1,
.phy_if = PHY_INTERFACE_MODE_RMII,
},
};
static struct cpsw_platform_data cl_som_am57_cpsw_data = {
.mdio_base = CPSW_MDIO_BASE,
.cpsw_base = CPSW_BASE,
.mdio_div = 0xff,
.channels = 8,
.cpdma_reg_ofs = 0x800,
.slaves = 2,
.slave_data = cl_som_am57x_cpsw_slaves,
.ale_reg_ofs = 0xd00,
.ale_entries = 1024,
.host_port_reg_ofs = 0x108,
.hw_stats_reg_ofs = 0x900,
.bd_ram_ofs = 0x2000,
.mac_control = (1 << 5),
.control = cpsw_control,
.host_port_num = 0,
.version = CPSW_CTRL_VERSION_2,
};
/*
* cl_som_am57x_efuse_read_mac_addr() - read Ethernet port MAC address.
* The information is retrieved from the SOC's registers.
* @buff: read buffer.
* @port_num: port number.
*/
static void cl_som_am57x_efuse_read_mac_addr(uchar *buff, uint port_num)
{
uint32_t mac_hi, mac_lo;
if (port_num) {
mac_lo = readl((*ctrl)->control_core_mac_id_1_lo);
mac_hi = readl((*ctrl)->control_core_mac_id_1_hi);
} else {
mac_lo = readl((*ctrl)->control_core_mac_id_0_lo);
mac_hi = readl((*ctrl)->control_core_mac_id_0_hi);
}
buff[0] = (mac_hi & 0xFF0000) >> 16;
buff[1] = (mac_hi & 0xFF00) >> 8;
buff[2] = mac_hi & 0xFF;
buff[3] = (mac_lo & 0xFF0000) >> 16;
buff[4] = (mac_lo & 0xFF00) >> 8;
buff[5] = mac_lo & 0xFF;
}
/*
* cl_som_am57x_handle_mac_address() - set MAC address in the U-Boot
* environment.
* The address is retrieved retrieved from an EEPROM field or from the
* SOC's registers.
* @env_name: U-Boot environment name.
* @field_name: EEPROM field name.
* @port_num: SOC's port number.
*/
static int cl_som_am57x_handle_mac_address(char *env_name, uint port_num)
{
int ret;
uint8_t enetaddr[6];
ret = eth_env_get_enetaddr(env_name, enetaddr);
if (ret)
return 0;
ret = cl_eeprom_read_mac_addr(enetaddr, CONFIG_SYS_I2C_EEPROM_BUS);
if (ret || !is_valid_ethaddr(enetaddr))
cl_som_am57x_efuse_read_mac_addr(enetaddr, port_num);
if (!is_valid_ethaddr(enetaddr))
return -1;
ret = eth_env_set_enetaddr(env_name, enetaddr);
if (ret)
printf("cl-som-am57x: Failed to set Eth port %d MAC address\n",
port_num);
return ret;
}
#define CL_SOM_AM57X_PHY_ADDR2 0x01
#define AR8033_PHY_DEBUG_ADDR_REG 0x1d
#define AR8033_PHY_DEBUG_DATA_REG 0x1e
#define AR8033_DEBUG_RGMII_RX_CLK_DLY_REG 0x00
#define AR8033_DEBUG_RGMII_TX_CLK_DLY_REG 0x05
#define AR8033_DEBUG_RGMII_RX_CLK_DLY_MASK (1 << 15)
#define AR8033_DEBUG_RGMII_TX_CLK_DLY_MASK (1 << 8)
/*
* cl_som_am57x_rgmii_clk_delay() - Set RGMII clock delay.
* Enable RX delay, disable TX delay.
*/
static void cl_som_am57x_rgmii_clk_delay(void)
{
uint16_t mii_reg_val;
const char *devname;
devname = miiphy_get_current_dev();
/* PHY 2 */
miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_ADDR_REG,
AR8033_DEBUG_RGMII_RX_CLK_DLY_REG);
miiphy_read(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
&mii_reg_val);
mii_reg_val |= AR8033_DEBUG_RGMII_RX_CLK_DLY_MASK;
miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
mii_reg_val);
miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_ADDR_REG,
AR8033_DEBUG_RGMII_TX_CLK_DLY_REG);
miiphy_read(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
&mii_reg_val);
mii_reg_val &= ~AR8033_DEBUG_RGMII_TX_CLK_DLY_MASK;
miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
mii_reg_val);
}
#define CL_SOM_AM57X_GPIO_PHY1_RST 92 /* GPIO3_28 */
#define CL_SOM_AM57X_RGMII_PORT1 1
int board_eth_init(bd_t *bis)
{
int ret;
uint32_t ctrl_val;
char *cpsw_phy_envval;
int cpsw_act_phy = 1;
/* SB-SOM-AM57x primary Eth (P21) is routed to RGMII1 */
ret = cl_som_am57x_handle_mac_address("ethaddr",
CL_SOM_AM57X_RGMII_PORT1);
if (ret)
return -1;
/* Select RGMII for GMII1_SEL */
ctrl_val = readl((*ctrl)->control_core_control_io1) & (~0x33);
ctrl_val |= 0x22;
writel(ctrl_val, (*ctrl)->control_core_control_io1);
mdelay(10);
gpio_request(CL_SOM_AM57X_GPIO_PHY1_RST, "phy1_rst");
gpio_direction_output(CL_SOM_AM57X_GPIO_PHY1_RST, 0);
mdelay(20);
gpio_set_value(CL_SOM_AM57X_GPIO_PHY1_RST, 1);
mdelay(20);
cpsw_phy_envval = env_get("cpsw_phy");
if (cpsw_phy_envval != NULL)
cpsw_act_phy = simple_strtoul(cpsw_phy_envval, NULL, 0);
cl_som_am57_cpsw_data.active_slave = cpsw_act_phy;
ret = cpsw_register(&cl_som_am57_cpsw_data);
if (ret < 0)
printf("Error %d registering CPSW switch\n", ret);
/* Set RGMII clock delay */
cl_som_am57x_rgmii_clk_delay();
return ret;
}