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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <dm.h>
#include <i2c.h>
#include <phy.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
DECLARE_GLOBAL_DATA_PTR;
/* IO expander I2C device */
#define I2C_IO_EXP_ADDR 0x22
#define I2C_IO_CFG_REG_0 0x6
#define I2C_IO_DATA_OUT_REG_0 0x2
#define I2C_IO_REG_0_SATA_OFF 2
#define I2C_IO_REG_0_USB_H_OFF 1
/* The pin control values are the same for DB and Espressobin */
#define PINCTRL_NB_REG_VALUE 0x000173fa
#define PINCTRL_SB_REG_VALUE 0x00007a23
/* Ethernet switch registers */
/* SMI addresses for multi-chip mode */
#define MVEBU_PORT_CTRL_SMI_ADDR(p) (16 + (p))
#define MVEBU_SW_G2_SMI_ADDR (28)
/* Multi-chip mode */
#define MVEBU_SW_SMI_DATA_REG (1)
#define MVEBU_SW_SMI_CMD_REG (0)
#define SW_SMI_CMD_REG_ADDR_OFF 0
#define SW_SMI_CMD_DEV_ADDR_OFF 5
#define SW_SMI_CMD_SMI_OP_OFF 10
#define SW_SMI_CMD_SMI_MODE_OFF 12
#define SW_SMI_CMD_SMI_BUSY_OFF 15
/* Single-chip mode */
/* Switch Port Registers */
#define MVEBU_SW_LINK_CTRL_REG (1)
#define MVEBU_SW_PORT_CTRL_REG (4)
/* Global 2 Registers */
#define MVEBU_G2_SMI_PHY_CMD_REG (24)
#define MVEBU_G2_SMI_PHY_DATA_REG (25)
int board_early_init_f(void)
{
return 0;
}
int board_init(void)
{
/* adress of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
return 0;
}
/* Board specific AHCI / SATA enable code */
int board_ahci_enable(void)
{
struct udevice *dev;
int ret;
u8 buf[8];
/* Only DB requres this configuration */
if (!of_machine_is_compatible("marvell,armada-3720-db"))
return 0;
/* Configure IO exander PCA9555: 7bit address 0x22 */
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
if (ret) {
printf("Cannot find PCA9555: %d\n", ret);
return 0;
}
ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
/*
* Enable SATA power via IO expander connected via I2C by setting
* the corresponding bit to output mode to enable power for SATA
*/
buf[0] &= ~(1 << I2C_IO_REG_0_SATA_OFF);
ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
return 0;
}
/* Board specific xHCI enable code */
int board_xhci_enable(fdt_addr_t base)
{
struct udevice *dev;
int ret;
u8 buf[8];
/* Only DB requres this configuration */
if (!of_machine_is_compatible("marvell,armada-3720-db"))
return 0;
/* Configure IO exander PCA9555: 7bit address 0x22 */
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
if (ret) {
printf("Cannot find PCA9555: %d\n", ret);
return 0;
}
printf("Enable USB VBUS\n");
/*
* Read configuration (direction) and set VBUS pin as output
* (reset pin = output)
*/
ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
/* Read VBUS output value and disable it */
ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
/*
* Required delay for configuration to settle - must wait for
* power on port is disabled in case VBUS signal was high,
* required 3 seconds delay to let VBUS signal fully settle down
*/
mdelay(3000);
/* Enable VBUS power: Set output value of VBUS pin as enabled */
buf[0] |= (1 << I2C_IO_REG_0_USB_H_OFF);
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
mdelay(500); /* required delay to let output value settle */
return 0;
}
/* Helper function for accessing switch devices in multi-chip connection mode */
static int mii_multi_chip_mode_write(struct mii_dev *bus, int dev_smi_addr,
int smi_addr, int reg, u16 value)
{
u16 smi_cmd = 0;
if (bus->write(bus, dev_smi_addr, 0,
MVEBU_SW_SMI_DATA_REG, value) != 0) {
printf("Error writing to the PHY addr=%02x reg=%02x\n",
smi_addr, reg);
return -EFAULT;
}
smi_cmd = (1 << SW_SMI_CMD_SMI_BUSY_OFF) |
(1 << SW_SMI_CMD_SMI_MODE_OFF) |
(1 << SW_SMI_CMD_SMI_OP_OFF) |
(smi_addr << SW_SMI_CMD_DEV_ADDR_OFF) |
(reg << SW_SMI_CMD_REG_ADDR_OFF);
if (bus->write(bus, dev_smi_addr, 0,
MVEBU_SW_SMI_CMD_REG, smi_cmd) != 0) {
printf("Error writing to the PHY addr=%02x reg=%02x\n",
smi_addr, reg);
return -EFAULT;
}
return 0;
}
/* Bring-up board-specific network stuff */
int board_network_enable(struct mii_dev *bus)
{
if (!of_machine_is_compatible("marvell,armada-3720-espressobin"))
return 0;
/*
* FIXME: remove this code once Topaz driver gets available
* A3720 Community Board Only
* Configure Topaz switch (88E6341)
* Set port 0,1,2,3 to forwarding Mode (through Switch Port registers)
*/
mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
MVEBU_SW_PORT_CTRL_REG, 0x7f);
mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(1),
MVEBU_SW_PORT_CTRL_REG, 0x7f);
mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(2),
MVEBU_SW_PORT_CTRL_REG, 0x7f);
mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(3),
MVEBU_SW_PORT_CTRL_REG, 0x7f);
/* RGMII Delay on Port 0 (CPU port), force link to 1000Mbps */
mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
MVEBU_SW_LINK_CTRL_REG, 0xe002);
/* Power up PHY 1, 2, 3 (through Global 2 registers) */
mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
MVEBU_G2_SMI_PHY_DATA_REG, 0x1140);
mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
MVEBU_G2_SMI_PHY_CMD_REG, 0x9620);
mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
MVEBU_G2_SMI_PHY_CMD_REG, 0x9640);
mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
MVEBU_G2_SMI_PHY_CMD_REG, 0x9660);
return 0;
}
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