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- // 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;
- }
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