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![Simon Glass](/assets/img/avatar_default.png)
This has moved to driver model so we don't need the fdtdec support. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Minkyu Kang <mk7.kang@samsung.com>
781 lines
27 KiB
C
781 lines
27 KiB
C
/*
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* Copyright (c) 2011 The Chromium OS Authors.
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __fdtdec_h
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#define __fdtdec_h
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/*
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* This file contains convenience functions for decoding useful and
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* enlightening information from FDTs. It is intended to be used by device
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* drivers and board-specific code within U-Boot. It aims to reduce the
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* amount of FDT munging required within U-Boot itself, so that driver code
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* changes to support FDT are minimized.
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*/
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#include <libfdt.h>
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#include <pci.h>
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/*
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* A typedef for a physical address. Note that fdt data is always big
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* endian even on a litle endian machine.
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*/
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#ifdef CONFIG_PHYS_64BIT
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typedef u64 fdt_addr_t;
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typedef u64 fdt_size_t;
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#define FDT_ADDR_T_NONE (-1ULL)
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#define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
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#define fdt_size_to_cpu(reg) be64_to_cpu(reg)
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#else
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typedef u32 fdt_addr_t;
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typedef u32 fdt_size_t;
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#define FDT_ADDR_T_NONE (-1U)
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#define fdt_addr_to_cpu(reg) be32_to_cpu(reg)
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#define fdt_size_to_cpu(reg) be32_to_cpu(reg)
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#endif
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/* Information obtained about memory from the FDT */
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struct fdt_memory {
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fdt_addr_t start;
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fdt_addr_t end;
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};
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/*
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* Information about a resource. start is the first address of the resource
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* and end is the last address (inclusive). The length of the resource will
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* be equal to: end - start + 1.
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*/
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struct fdt_resource {
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fdt_addr_t start;
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fdt_addr_t end;
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};
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enum fdt_pci_space {
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FDT_PCI_SPACE_CONFIG = 0,
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FDT_PCI_SPACE_IO = 0x01000000,
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FDT_PCI_SPACE_MEM32 = 0x02000000,
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FDT_PCI_SPACE_MEM64 = 0x03000000,
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FDT_PCI_SPACE_MEM32_PREF = 0x42000000,
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FDT_PCI_SPACE_MEM64_PREF = 0x43000000,
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};
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#define FDT_PCI_ADDR_CELLS 3
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#define FDT_PCI_SIZE_CELLS 2
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#define FDT_PCI_REG_SIZE \
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((FDT_PCI_ADDR_CELLS + FDT_PCI_SIZE_CELLS) * sizeof(u32))
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/*
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* The Open Firmware spec defines PCI physical address as follows:
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*
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* bits# 31 .... 24 23 .... 16 15 .... 08 07 .... 00
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*
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* phys.hi cell: npt000ss bbbbbbbb dddddfff rrrrrrrr
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* phys.mid cell: hhhhhhhh hhhhhhhh hhhhhhhh hhhhhhhh
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* phys.lo cell: llllllll llllllll llllllll llllllll
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*
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* where:
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*
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* n: is 0 if the address is relocatable, 1 otherwise
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* p: is 1 if addressable region is prefetchable, 0 otherwise
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* t: is 1 if the address is aliased (for non-relocatable I/O) below 1MB
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* (for Memory), or below 64KB (for relocatable I/O)
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* ss: is the space code, denoting the address space
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* bbbbbbbb: is the 8-bit Bus Number
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* ddddd: is the 5-bit Device Number
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* fff: is the 3-bit Function Number
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* rrrrrrrr: is the 8-bit Register Number
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* hhhhhhhh: is a 32-bit unsigned number
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* llllllll: is a 32-bit unsigned number
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*/
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struct fdt_pci_addr {
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u32 phys_hi;
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u32 phys_mid;
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u32 phys_lo;
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};
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/**
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* Compute the size of a resource.
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*
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* @param res the resource to operate on
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* @return the size of the resource
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*/
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static inline fdt_size_t fdt_resource_size(const struct fdt_resource *res)
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{
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return res->end - res->start + 1;
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}
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/**
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* Compat types that we know about and for which we might have drivers.
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* Each is named COMPAT_<dir>_<filename> where <dir> is the directory
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* within drivers.
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*/
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enum fdt_compat_id {
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COMPAT_UNKNOWN,
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COMPAT_NVIDIA_TEGRA20_USB, /* Tegra20 USB port */
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COMPAT_NVIDIA_TEGRA30_USB, /* Tegra30 USB port */
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COMPAT_NVIDIA_TEGRA114_USB, /* Tegra114 USB port */
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COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra20 memory controller */
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COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra20 memory timing table */
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COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra20 Keyboard */
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COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */
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COMPAT_NVIDIA_TEGRA20_PWM, /* Tegra 2 PWM controller */
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COMPAT_NVIDIA_TEGRA20_DC, /* Tegra 2 Display controller */
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COMPAT_NVIDIA_TEGRA124_SDMMC, /* Tegra124 SDMMC controller */
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COMPAT_NVIDIA_TEGRA30_SDMMC, /* Tegra30 SDMMC controller */
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COMPAT_NVIDIA_TEGRA20_SDMMC, /* Tegra20 SDMMC controller */
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COMPAT_NVIDIA_TEGRA124_PCIE, /* Tegra 124 PCIe controller */
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COMPAT_NVIDIA_TEGRA30_PCIE, /* Tegra 30 PCIe controller */
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COMPAT_NVIDIA_TEGRA20_PCIE, /* Tegra 20 PCIe controller */
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COMPAT_NVIDIA_TEGRA124_XUSB_PADCTL,
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/* Tegra124 XUSB pad controller */
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COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */
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COMPAT_SAMSUNG_EXYNOS5_SROMC, /* Exynos5 SROMC */
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COMPAT_SAMSUNG_S3C2440_I2C, /* Exynos I2C Controller */
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COMPAT_SAMSUNG_EXYNOS5_SOUND, /* Exynos Sound */
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COMPAT_WOLFSON_WM8994_CODEC, /* Wolfson WM8994 Sound Codec */
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COMPAT_GOOGLE_CROS_EC, /* Google CROS_EC Protocol */
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COMPAT_GOOGLE_CROS_EC_KEYB, /* Google CROS_EC Keyboard */
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COMPAT_SAMSUNG_EXYNOS_EHCI, /* Exynos EHCI controller */
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COMPAT_SAMSUNG_EXYNOS5_XHCI, /* Exynos5 XHCI controller */
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COMPAT_SAMSUNG_EXYNOS_USB_PHY, /* Exynos phy controller for usb2.0 */
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COMPAT_SAMSUNG_EXYNOS5_USB3_PHY,/* Exynos phy controller for usb3.0 */
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COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */
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COMPAT_SAMSUNG_EXYNOS_FIMD, /* Exynos Display controller */
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COMPAT_SAMSUNG_EXYNOS_MIPI_DSI, /* Exynos mipi dsi */
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COMPAT_SAMSUNG_EXYNOS5_DP, /* Exynos Display port controller */
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COMPAT_SAMSUNG_EXYNOS_DWMMC, /* Exynos DWMMC controller */
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COMPAT_SAMSUNG_EXYNOS_MMC, /* Exynos MMC controller */
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COMPAT_SAMSUNG_EXYNOS_SERIAL, /* Exynos UART */
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COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
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COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
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COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
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COMPAT_INFINEON_SLB9635_TPM, /* Infineon SLB9635 TPM */
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COMPAT_INFINEON_SLB9645_TPM, /* Infineon SLB9645 TPM */
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COMPAT_SAMSUNG_EXYNOS5_I2C, /* Exynos5 High Speed I2C Controller */
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COMPAT_SANDBOX_HOST_EMULATION, /* Sandbox emulation of a function */
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COMPAT_SANDBOX_LCD_SDL, /* Sandbox LCD emulation with SDL */
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COMPAT_TI_TPS65090, /* Texas Instrument TPS65090 */
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COMPAT_NXP_PTN3460, /* NXP PTN3460 DP/LVDS bridge */
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COMPAT_SAMSUNG_EXYNOS_SYSMMU, /* Exynos sysmmu */
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COMPAT_PARADE_PS8625, /* Parade PS8622 EDP->LVDS bridge */
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COMPAT_INTEL_LPC, /* Intel Low Pin Count I/F */
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COMPAT_INTEL_MICROCODE, /* Intel microcode update */
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COMPAT_MEMORY_SPD, /* Memory SPD information */
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COMPAT_INTEL_PANTHERPOINT_AHCI, /* Intel Pantherpoint AHCI */
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COMPAT_INTEL_MODEL_206AX, /* Intel Model 206AX CPU */
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COMPAT_INTEL_GMA, /* Intel Graphics Media Accelerator */
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COMPAT_AMS_AS3722, /* AMS AS3722 PMIC */
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COMPAT_INTEL_ICH_SPI, /* Intel ICH7/9 SPI controller */
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COMPAT_COUNT,
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};
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#define MAX_PHANDLE_ARGS 16
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struct fdtdec_phandle_args {
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int node;
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int args_count;
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uint32_t args[MAX_PHANDLE_ARGS];
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};
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/**
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* fdtdec_parse_phandle_with_args() - Find a node pointed by phandle in a list
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*
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* This function is useful to parse lists of phandles and their arguments.
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*
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* Example:
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*
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* phandle1: node1 {
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* #list-cells = <2>;
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* }
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*
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* phandle2: node2 {
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* #list-cells = <1>;
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* }
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*
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* node3 {
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* list = <&phandle1 1 2 &phandle2 3>;
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* }
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*
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* To get a device_node of the `node2' node you may call this:
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* fdtdec_parse_phandle_with_args(blob, node3, "list", "#list-cells", 0, 1,
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* &args);
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*
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* (This function is a modified version of __of_parse_phandle_with_args() from
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* Linux 3.18)
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*
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* @blob: Pointer to device tree
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* @src_node: Offset of device tree node containing a list
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* @list_name: property name that contains a list
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* @cells_name: property name that specifies the phandles' arguments count,
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* or NULL to use @cells_count
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* @cells_count: Cell count to use if @cells_name is NULL
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* @index: index of a phandle to parse out
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* @out_args: optional pointer to output arguments structure (will be filled)
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* @return 0 on success (with @out_args filled out if not NULL), -ENOENT if
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* @list_name does not exist, a phandle was not found, @cells_name
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* could not be found, the arguments were truncated or there were too
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* many arguments.
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*
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*/
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int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
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const char *list_name,
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const char *cells_name,
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int cell_count, int index,
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struct fdtdec_phandle_args *out_args);
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/**
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* Find the next numbered alias for a peripheral. This is used to enumerate
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* all the peripherals of a certain type.
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*
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* Do the first call with *upto = 0. Assuming /aliases/<name>0 exists then
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* this function will return a pointer to the node the alias points to, and
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* then update *upto to 1. Next time you call this function, the next node
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* will be returned.
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*
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* All nodes returned will match the compatible ID, as it is assumed that
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* all peripherals use the same driver.
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*
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* @param blob FDT blob to use
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* @param name Root name of alias to search for
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* @param id Compatible ID to look for
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* @return offset of next compatible node, or -FDT_ERR_NOTFOUND if no more
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*/
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int fdtdec_next_alias(const void *blob, const char *name,
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enum fdt_compat_id id, int *upto);
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/**
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* Find the compatible ID for a given node.
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*
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* Generally each node has at least one compatible string attached to it.
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* This function looks through our list of known compatible strings and
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* returns the corresponding ID which matches the compatible string.
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*
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* @param blob FDT blob to use
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* @param node Node containing compatible string to find
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* @return compatible ID, or COMPAT_UNKNOWN if we cannot find a match
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*/
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enum fdt_compat_id fdtdec_lookup(const void *blob, int node);
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/**
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* Find the next compatible node for a peripheral.
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*
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* Do the first call with node = 0. This function will return a pointer to
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* the next compatible node. Next time you call this function, pass the
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* value returned, and the next node will be provided.
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*
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* @param blob FDT blob to use
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* @param node Start node for search
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* @param id Compatible ID to look for (enum fdt_compat_id)
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* @return offset of next compatible node, or -FDT_ERR_NOTFOUND if no more
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*/
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int fdtdec_next_compatible(const void *blob, int node,
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enum fdt_compat_id id);
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/**
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* Find the next compatible subnode for a peripheral.
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*
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* Do the first call with node set to the parent and depth = 0. This
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* function will return the offset of the next compatible node. Next time
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* you call this function, pass the node value returned last time, with
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* depth unchanged, and the next node will be provided.
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*
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* @param blob FDT blob to use
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* @param node Start node for search
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* @param id Compatible ID to look for (enum fdt_compat_id)
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* @param depthp Current depth (set to 0 before first call)
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* @return offset of next compatible node, or -FDT_ERR_NOTFOUND if no more
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*/
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int fdtdec_next_compatible_subnode(const void *blob, int node,
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enum fdt_compat_id id, int *depthp);
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/**
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* Look up an address property in a node and return it as an address.
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* The property must hold either one address with no trailing data or
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* one address with a length. This is only tested on 32-bit machines.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param prop_name name of property to find
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* @return address, if found, or FDT_ADDR_T_NONE if not
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*/
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fdt_addr_t fdtdec_get_addr(const void *blob, int node,
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const char *prop_name);
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/**
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* Look up an address property in a node and return it as an address.
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* The property must hold one address with a length. This is only tested
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* on 32-bit machines.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param prop_name name of property to find
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* @return address, if found, or FDT_ADDR_T_NONE if not
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*/
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fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
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const char *prop_name, fdt_size_t *sizep);
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/**
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* Look at an address property in a node and return the pci address which
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* corresponds to the given type in the form of fdt_pci_addr.
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* The property must hold one fdt_pci_addr with a lengh.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param type pci address type (FDT_PCI_SPACE_xxx)
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* @param prop_name name of property to find
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* @param addr returns pci address in the form of fdt_pci_addr
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* @return 0 if ok, negative on error
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*/
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int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
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const char *prop_name, struct fdt_pci_addr *addr);
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/**
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* Look at the compatible property of a device node that represents a PCI
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* device and extract pci vendor id and device id from it.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param vendor vendor id of the pci device
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* @param device device id of the pci device
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* @return 0 if ok, negative on error
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*/
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int fdtdec_get_pci_vendev(const void *blob, int node,
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u16 *vendor, u16 *device);
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/**
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* Look at the pci address of a device node that represents a PCI device
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* and parse the bus, device and function number from it.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param addr pci address in the form of fdt_pci_addr
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* @param bdf returns bus, device, function triplet
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* @return 0 if ok, negative on error
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*/
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int fdtdec_get_pci_bdf(const void *blob, int node,
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struct fdt_pci_addr *addr, pci_dev_t *bdf);
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/**
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* Look at the pci address of a device node that represents a PCI device
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* and return base address of the pci device's registers.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param addr pci address in the form of fdt_pci_addr
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* @param bar returns base address of the pci device's registers
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* @return 0 if ok, negative on error
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*/
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int fdtdec_get_pci_bar32(const void *blob, int node,
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struct fdt_pci_addr *addr, u32 *bar);
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/**
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* Look up a 32-bit integer property in a node and return it. The property
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* must have at least 4 bytes of data. The value of the first cell is
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* returned.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param prop_name name of property to find
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* @param default_val default value to return if the property is not found
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* @return integer value, if found, or default_val if not
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*/
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s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
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s32 default_val);
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/**
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* Look up a 64-bit integer property in a node and return it. The property
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* must have at least 8 bytes of data (2 cells). The first two cells are
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* concatenated to form a 8 bytes value, where the first cell is top half and
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* the second cell is bottom half.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @param prop_name name of property to find
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* @param default_val default value to return if the property is not found
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* @return integer value, if found, or default_val if not
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*/
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uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
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uint64_t default_val);
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/**
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* Checks whether a node is enabled.
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* This looks for a 'status' property. If this exists, then returns 1 if
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* the status is 'ok' and 0 otherwise. If there is no status property,
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* it returns 1 on the assumption that anything mentioned should be enabled
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* by default.
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*
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* @param blob FDT blob
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* @param node node to examine
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* @return integer value 0 (not enabled) or 1 (enabled)
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*/
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int fdtdec_get_is_enabled(const void *blob, int node);
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/**
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* Make sure we have a valid fdt available to control U-Boot.
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*
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* If not, a message is printed to the console if the console is ready.
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*
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* @return 0 if all ok, -1 if not
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*/
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int fdtdec_prepare_fdt(void);
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/**
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* Checks that we have a valid fdt available to control U-Boot.
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* However, if not then for the moment nothing is done, since this function
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* is called too early to panic().
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*
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* @returns 0
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*/
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int fdtdec_check_fdt(void);
|
|
|
|
/**
|
|
* Find the nodes for a peripheral and return a list of them in the correct
|
|
* order. This is used to enumerate all the peripherals of a certain type.
|
|
*
|
|
* To use this, optionally set up a /aliases node with alias properties for
|
|
* a peripheral. For example, for usb you could have:
|
|
*
|
|
* aliases {
|
|
* usb0 = "/ehci@c5008000";
|
|
* usb1 = "/ehci@c5000000";
|
|
* };
|
|
*
|
|
* Pass "usb" as the name to this function and will return a list of two
|
|
* nodes offsets: /ehci@c5008000 and ehci@c5000000.
|
|
*
|
|
* All nodes returned will match the compatible ID, as it is assumed that
|
|
* all peripherals use the same driver.
|
|
*
|
|
* If no alias node is found, then the node list will be returned in the
|
|
* order found in the fdt. If the aliases mention a node which doesn't
|
|
* exist, then this will be ignored. If nodes are found with no aliases,
|
|
* they will be added in any order.
|
|
*
|
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* If there is a gap in the aliases, then this function return a 0 node at
|
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* that position. The return value will also count these gaps.
|
|
*
|
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* This function checks node properties and will not return nodes which are
|
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* marked disabled (status = "disabled").
|
|
*
|
|
* @param blob FDT blob to use
|
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* @param name Root name of alias to search for
|
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* @param id Compatible ID to look for
|
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* @param node_list Place to put list of found nodes
|
|
* @param maxcount Maximum number of nodes to find
|
|
* @return number of nodes found on success, FTD_ERR_... on error
|
|
*/
|
|
int fdtdec_find_aliases_for_id(const void *blob, const char *name,
|
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enum fdt_compat_id id, int *node_list, int maxcount);
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|
|
|
/*
|
|
* This function is similar to fdtdec_find_aliases_for_id() except that it
|
|
* adds to the node_list that is passed in. Any 0 elements are considered
|
|
* available for allocation - others are considered already used and are
|
|
* skipped.
|
|
*
|
|
* You can use this by calling fdtdec_find_aliases_for_id() with an
|
|
* uninitialised array, then setting the elements that are returned to -1,
|
|
* say, then calling this function, perhaps with a different compat id.
|
|
* Any elements you get back that are >0 are new nodes added by the call
|
|
* to this function.
|
|
*
|
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* Note that if you have some nodes with aliases and some without, you are
|
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* sailing close to the wind. The call to fdtdec_find_aliases_for_id() with
|
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* one compat_id may fill in positions for which you have aliases defined
|
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* for another compat_id. When you later call *this* function with the second
|
|
* compat_id, the alias positions may already be used. A debug warning may
|
|
* be generated in this case, but it is safest to define aliases for all
|
|
* nodes when you care about the ordering.
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|
*/
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|
int fdtdec_add_aliases_for_id(const void *blob, const char *name,
|
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enum fdt_compat_id id, int *node_list, int maxcount);
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|
|
|
/**
|
|
* Get the alias sequence number of a node
|
|
*
|
|
* This works out whether a node is pointed to by an alias, and if so, the
|
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* sequence number of that alias. Aliases are of the form <base><num> where
|
|
* <num> is the sequence number. For example spi2 would be sequence number
|
|
* 2.
|
|
*
|
|
* @param blob Device tree blob (if NULL, then error is returned)
|
|
* @param base Base name for alias (before the underscore)
|
|
* @param node Node to look up
|
|
* @param seqp This is set to the sequence number if one is found,
|
|
* but otherwise the value is left alone
|
|
* @return 0 if a sequence was found, -ve if not
|
|
*/
|
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int fdtdec_get_alias_seq(const void *blob, const char *base, int node,
|
|
int *seqp);
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|
/**
|
|
* Get the offset of the given chosen node
|
|
*
|
|
* This looks up a property in /chosen containing the path to another node,
|
|
* then finds the offset of that node.
|
|
*
|
|
* @param blob Device tree blob (if NULL, then error is returned)
|
|
* @param name Property name, e.g. "stdout-path"
|
|
* @return Node offset referred to by that chosen node, or -ve FDT_ERR_...
|
|
*/
|
|
int fdtdec_get_chosen_node(const void *blob, const char *name);
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|
|
|
/*
|
|
* Get the name for a compatible ID
|
|
*
|
|
* @param id Compatible ID to look for
|
|
* @return compatible string for that id
|
|
*/
|
|
const char *fdtdec_get_compatible(enum fdt_compat_id id);
|
|
|
|
/* Look up a phandle and follow it to its node. Then return the offset
|
|
* of that node.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @return node offset if found, -ve error code on error
|
|
*/
|
|
int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name);
|
|
|
|
/**
|
|
* Look up a property in a node and return its contents in an integer
|
|
* array of given length. The property must have at least enough data for
|
|
* the array (4*count bytes). It may have more, but this will be ignored.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param array array to fill with data
|
|
* @param count number of array elements
|
|
* @return 0 if ok, or -FDT_ERR_NOTFOUND if the property is not found,
|
|
* or -FDT_ERR_BADLAYOUT if not enough data
|
|
*/
|
|
int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
|
|
u32 *array, int count);
|
|
|
|
/**
|
|
* Look up a property in a node and return its contents in an integer
|
|
* array of given length. The property must exist but may have less data that
|
|
* expected (4*count bytes). It may have more, but this will be ignored.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param array array to fill with data
|
|
* @param count number of array elements
|
|
* @return number of array elements if ok, or -FDT_ERR_NOTFOUND if the
|
|
* property is not found
|
|
*/
|
|
int fdtdec_get_int_array_count(const void *blob, int node,
|
|
const char *prop_name, u32 *array, int count);
|
|
|
|
/**
|
|
* Look up a property in a node and return a pointer to its contents as a
|
|
* unsigned int array of given length. The property must have at least enough
|
|
* data for the array ('count' cells). It may have more, but this will be
|
|
* ignored. The data is not copied.
|
|
*
|
|
* Note that you must access elements of the array with fdt32_to_cpu(),
|
|
* since the elements will be big endian even on a little endian machine.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param count number of array elements
|
|
* @return pointer to array if found, or NULL if the property is not
|
|
* found or there is not enough data
|
|
*/
|
|
const u32 *fdtdec_locate_array(const void *blob, int node,
|
|
const char *prop_name, int count);
|
|
|
|
/**
|
|
* Look up a boolean property in a node and return it.
|
|
*
|
|
* A boolean properly is true if present in the device tree and false if not
|
|
* present, regardless of its value.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @return 1 if the properly is present; 0 if it isn't present
|
|
*/
|
|
int fdtdec_get_bool(const void *blob, int node, const char *prop_name);
|
|
|
|
/**
|
|
* Look in the FDT for a config item with the given name and return its value
|
|
* as a 32-bit integer. The property must have at least 4 bytes of data. The
|
|
* value of the first cell is returned.
|
|
*
|
|
* @param blob FDT blob to use
|
|
* @param prop_name Node property name
|
|
* @param default_val default value to return if the property is not found
|
|
* @return integer value, if found, or default_val if not
|
|
*/
|
|
int fdtdec_get_config_int(const void *blob, const char *prop_name,
|
|
int default_val);
|
|
|
|
/**
|
|
* Look in the FDT for a config item with the given name
|
|
* and return whether it exists.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param prop_name property name to look up
|
|
* @return 1, if it exists, or 0 if not
|
|
*/
|
|
int fdtdec_get_config_bool(const void *blob, const char *prop_name);
|
|
|
|
/**
|
|
* Look in the FDT for a config item with the given name and return its value
|
|
* as a string.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param prop_name property name to look up
|
|
* @returns property string, NULL on error.
|
|
*/
|
|
char *fdtdec_get_config_string(const void *blob, const char *prop_name);
|
|
|
|
/*
|
|
* Look up a property in a node and return its contents in a byte
|
|
* array of given length. The property must have at least enough data for
|
|
* the array (count bytes). It may have more, but this will be ignored.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param array array to fill with data
|
|
* @param count number of array elements
|
|
* @return 0 if ok, or -FDT_ERR_MISSING if the property is not found,
|
|
* or -FDT_ERR_BADLAYOUT if not enough data
|
|
*/
|
|
int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
|
|
u8 *array, int count);
|
|
|
|
/**
|
|
* Look up a property in a node and return a pointer to its contents as a
|
|
* byte array of given length. The property must have at least enough data
|
|
* for the array (count bytes). It may have more, but this will be ignored.
|
|
* The data is not copied.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param count number of array elements
|
|
* @return pointer to byte array if found, or NULL if the property is not
|
|
* found or there is not enough data
|
|
*/
|
|
const u8 *fdtdec_locate_byte_array(const void *blob, int node,
|
|
const char *prop_name, int count);
|
|
|
|
/**
|
|
* Look up a property in a node which contains a memory region address and
|
|
* size. Then return a pointer to this address.
|
|
*
|
|
* The property must hold one address with a length. This is only tested on
|
|
* 32-bit machines.
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node node to examine
|
|
* @param prop_name name of property to find
|
|
* @param basep Returns base address of region
|
|
* @param size Returns size of region
|
|
* @return 0 if ok, -1 on error (property not found)
|
|
*/
|
|
int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
|
|
fdt_addr_t *basep, fdt_size_t *sizep);
|
|
|
|
enum fmap_compress_t {
|
|
FMAP_COMPRESS_NONE,
|
|
FMAP_COMPRESS_LZO,
|
|
};
|
|
|
|
enum fmap_hash_t {
|
|
FMAP_HASH_NONE,
|
|
FMAP_HASH_SHA1,
|
|
FMAP_HASH_SHA256,
|
|
};
|
|
|
|
/* A flash map entry, containing an offset and length */
|
|
struct fmap_entry {
|
|
uint32_t offset;
|
|
uint32_t length;
|
|
uint32_t used; /* Number of bytes used in region */
|
|
enum fmap_compress_t compress_algo; /* Compression type */
|
|
enum fmap_hash_t hash_algo; /* Hash algorithm */
|
|
const uint8_t *hash; /* Hash value */
|
|
int hash_size; /* Hash size */
|
|
};
|
|
|
|
/**
|
|
* Read a flash entry from the fdt
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node Offset of node to read
|
|
* @param name Name of node being read
|
|
* @param entry Place to put offset and size of this node
|
|
* @return 0 if ok, -ve on error
|
|
*/
|
|
int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
|
|
struct fmap_entry *entry);
|
|
|
|
/**
|
|
* Obtain an indexed resource from a device property.
|
|
*
|
|
* @param fdt FDT blob
|
|
* @param node node to examine
|
|
* @param property name of the property to parse
|
|
* @param index index of the resource to retrieve
|
|
* @param res returns the resource
|
|
* @return 0 if ok, negative on error
|
|
*/
|
|
int fdt_get_resource(const void *fdt, int node, const char *property,
|
|
unsigned int index, struct fdt_resource *res);
|
|
|
|
/**
|
|
* Obtain a named resource from a device property.
|
|
*
|
|
* Look up the index of the name in a list of strings and return the resource
|
|
* at that index.
|
|
*
|
|
* @param fdt FDT blob
|
|
* @param node node to examine
|
|
* @param property name of the property to parse
|
|
* @param prop_names name of the property containing the list of names
|
|
* @param name the name of the entry to look up
|
|
* @param res returns the resource
|
|
*/
|
|
int fdt_get_named_resource(const void *fdt, int node, const char *property,
|
|
const char *prop_names, const char *name,
|
|
struct fdt_resource *res);
|
|
|
|
/**
|
|
* Decode a named region within a memory bank of a given type.
|
|
*
|
|
* This function handles selection of a memory region. The region is
|
|
* specified as an offset/size within a particular type of memory.
|
|
*
|
|
* The properties used are:
|
|
*
|
|
* <mem_type>-memory<suffix> for the name of the memory bank
|
|
* <mem_type>-offset<suffix> for the offset in that bank
|
|
*
|
|
* The property value must have an offset and a size. The function checks
|
|
* that the region is entirely within the memory bank.5
|
|
*
|
|
* @param blob FDT blob
|
|
* @param node Node containing the properties (-1 for /config)
|
|
* @param mem_type Type of memory to use, which is a name, such as
|
|
* "u-boot" or "kernel".
|
|
* @param suffix String to append to the memory/offset
|
|
* property names
|
|
* @param basep Returns base of region
|
|
* @param sizep Returns size of region
|
|
* @return 0 if OK, -ive on error
|
|
*/
|
|
int fdtdec_decode_memory_region(const void *blob, int node,
|
|
const char *mem_type, const char *suffix,
|
|
fdt_addr_t *basep, fdt_size_t *sizep);
|
|
#endif
|