blob: 09ef39ff30adbd4faf6ae99af2a8d20fe46f6f44 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <common.h>
#include <dm.h>
#include <env_internal.h>
#include <init.h>
#include <net.h>
#include <asm/io.h>
#include <asm/arch/eth.h>
#include <i2c.h>
#include "khadas-mcu.h"
/*
* The VIM3 on-board MCU can mux the PCIe/USB3.0 shared differential
* lines using a FUSB340TMX USB 3.1 SuperSpeed Data Switch between
* an USB3.0 Type A connector and a M.2 Key M slot.
* The PHY driving these differential lines is shared between
* the USB3.0 controller and the PCIe Controller, thus only
* a single controller can use it.
*/
int meson_ft_board_setup(void *blob, struct bd_info *bd)
{
struct udevice *bus, *dev;
int node, i2c_node, ret;
unsigned int i2c_addr;
u32 *val;
/* Find I2C device */
node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "khadas,mcu");
if (node < 0) {
printf("vim3: cannot find khadas,mcu node\n");
return 0;
}
/* Get addr */
val = (u32 *)fdt_getprop(gd->fdt_blob, node, "reg", NULL);
if (!val) {
printf("vim3: cannot find khadas,mcu node i2c addr\n");
return 0;
}
i2c_addr = fdt32_to_cpu(*val);
/* Get i2c device */
i2c_node = fdt_parent_offset(gd->fdt_blob, node);
if (node < 0) {
printf("vim3: cannot find khadas,mcu i2c node\n");
return 0;
}
ret = uclass_get_device_by_of_offset(UCLASS_I2C, i2c_node, &bus);
if (ret < 0) {
printf("vim3: cannot find i2c bus (%d)\n", ret);
return 0;
}
ret = i2c_get_chip(bus, i2c_addr, 1, &dev);
if (ret < 0) {
printf("vim3: cannot find i2c chip (%d)\n", ret);
return 0;
}
/* Read USB_PCIE_SWITCH_REG */
ret = dm_i2c_reg_read(dev, KHADAS_MCU_USB_PCIE_SWITCH_REG);
if (ret < 0) {
printf("vim3: failed to read i2c reg (%d)\n", ret);
return 0;
}
debug("MCU_USB_PCIE_SWITCH_REG: %d\n", ret);
/*
* If in PCIe mode, alter DT
* 0:Enable USB3.0,Disable PCIE, 1:Disable USB3.0, Enable PCIE
*/
if (ret > 0) {
static char data[32] __aligned(4);
const void *ptmp;
int len;
/* Find USB node */
node = fdt_node_offset_by_compatible(blob, -1, "amlogic,meson-g12a-usb-ctrl");
if (node < 0) {
printf("vim3: cannot find amlogic,meson-g12a-usb-ctrl node\n");
return 0;
}
/* Update PHY names (mandatory to disable USB3.0) */
len = strlcpy(data, "usb2-phy0", 32) + 1;
len += strlcpy(&data[len], "usb2-phy1", 32 - len) + 1;
ret = fdt_setprop(blob, node, "phy-names", data, len);
if (ret < 0) {
printf("vim3: failed to update usb phy names property (%d)\n", ret);
return 0;
}
/* Update PHY list, by keeping the 2 first entries (optional) */
ptmp = fdt_getprop(blob, node, "phys", &len);
if (ptmp) {
memcpy(data, ptmp, min_t(unsigned int, 2 * sizeof(u32), len));
ret = fdt_setprop(blob, node, "phys", data,
min_t(unsigned int, 2 * sizeof(u32), len));
if (ret < 0)
printf("vim3: failed to update usb phys property (%d)\n", ret);
} else
printf("vim3: cannot find usb node phys property\n");
/* Find PCIe node */
node = fdt_node_offset_by_compatible(blob, -1, "amlogic,g12a-pcie");
if (node < 0) {
printf("vim3: cannot find amlogic,g12a-pcie node\n");
return 0;
}
/* Enable PCIe */
len = strlcpy(data, "okay", 32);
ret = fdt_setprop(blob, node, "status", data, len);
if (ret < 0) {
printf("vim3: failed to enable pcie node (%d)\n", ret);
return 0;
}
printf("vim3: successfully enabled PCIe\n");
}
return 0;
}
int misc_init_r(void)
{
meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
return 0;
}