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https://github.com/brain-hackers/u-boot-brain
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![Thierry Reding](/assets/img/avatar_default.png)
If early firmware initialized the display hardware and the display controllers are scanning out a framebuffer (e.g. a splash screen), make sure to pass information about the memory location of that framebuffer to the kernel before booting to avoid the kernel from using that memory for the buddy allocator. This same mechanism can also be used in the kernel to set up early SMMU mappings and avoid SMMU faults caused by the display controller reading from memory for which it has no mapping. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016, NVIDIA CORPORATION
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*/
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#include <common.h>
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#include <environment.h>
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#include <fdtdec.h>
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#include <i2c.h>
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#include <linux/libfdt.h>
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#include <asm/arch-tegra/cboot.h>
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#include "../p2571/max77620_init.h"
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void pin_mux_mmc(void)
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{
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struct udevice *dev;
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uchar val;
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int ret;
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/* Turn on MAX77620 LDO3 to 3.3V for SD card power */
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debug("%s: Set LDO3 for VDDIO_SDMMC_AP power to 3.3V\n", __func__);
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ret = i2c_get_chip_for_busnum(0, MAX77620_I2C_ADDR_7BIT, 1, &dev);
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if (ret) {
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printf("%s: Cannot find MAX77620 I2C chip\n", __func__);
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return;
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}
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/* 0xF2 for 3.3v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
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val = 0xF2;
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ret = dm_i2c_write(dev, MAX77620_CNFG1_L3_REG, &val, 1);
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if (ret) {
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printf("i2c_write 0 0x3c 0x27 failed: %d\n", ret);
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return;
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}
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}
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#ifdef CONFIG_PCI_TEGRA
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int tegra_pcie_board_init(void)
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{
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struct udevice *dev;
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uchar val;
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int ret;
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/* Turn on MAX77620 LDO7 to 1.05V for PEX power */
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debug("%s: Set LDO7 for PEX power to 1.05V\n", __func__);
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ret = i2c_get_chip_for_busnum(0, MAX77620_I2C_ADDR_7BIT, 1, &dev);
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if (ret) {
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printf("%s: Cannot find MAX77620 I2C chip\n", __func__);
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return -1;
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}
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/* 0xC5 for 1.05v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
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val = 0xC5;
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ret = dm_i2c_write(dev, MAX77620_CNFG1_L7_REG, &val, 1);
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if (ret)
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printf("i2c_write 0 0x3c 0x31 failed: %d\n", ret);
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return 0;
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}
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#endif
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static void ft_mac_address_setup(void *fdt)
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{
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const void *cboot_fdt = (const void *)cboot_boot_x0;
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uint8_t mac[ETH_ALEN], local_mac[ETH_ALEN];
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const char *path;
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int offset, err;
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err = cboot_get_ethaddr(cboot_fdt, local_mac);
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if (err < 0)
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memset(local_mac, 0, ETH_ALEN);
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path = fdt_get_alias(fdt, "ethernet");
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if (!path)
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return;
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debug("ethernet alias found: %s\n", path);
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offset = fdt_path_offset(fdt, path);
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if (offset < 0) {
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printf("ethernet alias points to absent node %s\n", path);
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return;
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}
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if (is_valid_ethaddr(local_mac)) {
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err = fdt_setprop(fdt, offset, "local-mac-address", local_mac,
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ETH_ALEN);
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if (!err)
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debug("Local MAC address set: %pM\n", local_mac);
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}
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if (eth_env_get_enetaddr("ethaddr", mac)) {
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if (memcmp(local_mac, mac, ETH_ALEN) != 0) {
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err = fdt_setprop(fdt, offset, "mac-address", mac,
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ETH_ALEN);
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if (!err)
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debug("MAC address set: %pM\n", mac);
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}
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}
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}
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static int ft_copy_carveout(void *dst, const void *src, const char *node)
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{
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struct fdt_memory fb;
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int err;
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err = fdtdec_get_carveout(src, node, "memory-region", 0, &fb);
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if (err < 0) {
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if (err != -FDT_ERR_NOTFOUND)
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printf("failed to get carveout for %s: %d\n", node,
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err);
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return err;
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}
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err = fdtdec_set_carveout(dst, node, "memory-region", 0, "framebuffer",
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&fb);
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if (err < 0) {
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printf("failed to set carveout for %s: %d\n", node, err);
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return err;
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}
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return 0;
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}
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static void ft_carveout_setup(void *fdt)
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{
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const void *cboot_fdt = (const void *)cboot_boot_x0;
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static const char * const nodes[] = {
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"/host1x@13e00000/display-hub@15200000/display@15200000",
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"/host1x@13e00000/display-hub@15200000/display@15210000",
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"/host1x@13e00000/display-hub@15200000/display@15220000",
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};
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unsigned int i;
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int err;
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for (i = 0; i < ARRAY_SIZE(nodes); i++) {
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printf("copying carveout for %s...\n", nodes[i]);
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err = ft_copy_carveout(fdt, cboot_fdt, nodes[i]);
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if (err < 0) {
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if (err != -FDT_ERR_NOTFOUND)
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printf("failed to copy carveout for %s: %d\n",
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nodes[i], err);
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continue;
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}
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}
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}
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int ft_board_setup(void *fdt, bd_t *bd)
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{
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ft_mac_address_setup(fdt);
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ft_carveout_setup(fdt);
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return 0;
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}
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