fdtdec.c

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <errno.h>
#include <serial.h>
#include <libfdt.h>
#include <fdtdec.h>
#include <asm/sections.h>
#include <linux/ctype.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Here are the type we know about. One day we might allow drivers to
 * register. For now we just put them here. The COMPAT macro allows us to
 * turn this into a sparse list later, and keeps the ID with the name.
 */
#define COMPAT(id, name) name
static const char * const compat_names[COMPAT_COUNT] = {
	COMPAT(UNKNOWN, "<none>"),
	COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
	COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
	COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
	COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
	COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
	COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
	COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
	COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
	COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
	COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
	COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
	COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
	COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
	COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
	COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
	COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
	COMPAT(SMSC_LAN9215, "smsc,lan9215"),
	COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
	COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
	COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
	COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
	COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
	COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
	COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
	COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
	COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
	COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
	COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
	COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
	COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
	COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
	COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
	COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
	COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
	COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
	COMPAT(TI_TPS65090, "ti,tps65090"),
	COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
	COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
	COMPAT(PARADE_PS8625, "parade,ps8625"),
	COMPAT(INTEL_MICROCODE, "intel,microcode"),
	COMPAT(MEMORY_SPD, "memory-spd"),
	COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
	COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
	COMPAT(INTEL_GMA, "intel,gma"),
	COMPAT(AMS_AS3722, "ams,as3722"),
	COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
	COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
	COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
	COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
};

const char *fdtdec_get_compatible(enum fdt_compat_id id)
{
	/* We allow reading of the 'unknown' ID for testing purposes */
	assert(id >= 0 && id < COMPAT_COUNT);
	return compat_names[id];
}

fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
		const char *prop_name, fdt_size_t *sizep)
{
	const fdt_addr_t *cell;
	int len;

	debug("%s: %s: ", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
		     len == sizeof(fdt_addr_t) * 2)) {
		fdt_addr_t addr = fdt_addr_to_cpu(*cell);
		if (sizep) {
			const fdt_size_t *size;

			size = (fdt_size_t *)((char *)cell +
					sizeof(fdt_addr_t));
			*sizep = fdt_size_to_cpu(*size);
			debug("addr=%08lx, size=%08x\n",
			      (ulong)addr, *sizep);
		} else {
			debug("%08lx\n", (ulong)addr);
		}
		return addr;
	}
	debug("(not found)\n");
	return FDT_ADDR_T_NONE;
}

fdt_addr_t fdtdec_get_addr(const void *blob, int node,
		const char *prop_name)
{
	return fdtdec_get_addr_size(blob, node, prop_name, NULL);
}

#ifdef CONFIG_PCI
int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
		const char *prop_name, struct fdt_pci_addr *addr)
{
	const u32 *cell;
	int len;
	int ret = -ENOENT;

	debug("%s: %s: ", __func__, prop_name);

	/*
	 * If we follow the pci bus bindings strictly, we should check
	 * the value of the node's parent node's #address-cells and
	 * #size-cells. They need to be 3 and 2 accordingly. However,
	 * for simplicity we skip the check here.
	 */
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (!cell)
		goto fail;

	if ((len % FDT_PCI_REG_SIZE) == 0) {
		int num = len / FDT_PCI_REG_SIZE;
		int i;

		for (i = 0; i < num; i++) {
			debug("pci address #%d: %08lx %08lx %08lx\n", i,
			      (ulong)fdt_addr_to_cpu(cell[0]),
			      (ulong)fdt_addr_to_cpu(cell[1]),
			      (ulong)fdt_addr_to_cpu(cell[2]));
			if ((fdt_addr_to_cpu(*cell) & type) == type) {
				addr->phys_hi = fdt_addr_to_cpu(cell[0]);
				addr->phys_mid = fdt_addr_to_cpu(cell[1]);
				addr->phys_lo = fdt_addr_to_cpu(cell[2]);
				break;
			} else {
				cell += (FDT_PCI_ADDR_CELLS +
					 FDT_PCI_SIZE_CELLS);
			}
		}

		if (i == num) {
			ret = -ENXIO;
			goto fail;
		}

		return 0;
	} else {
		ret = -EINVAL;
	}

fail:
	debug("(not found)\n");
	return ret;
}

int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
{
	const char *list, *end;
	int len;

	list = fdt_getprop(blob, node, "compatible", &len);
	if (!list)
		return -ENOENT;

	end = list + len;
	while (list < end) {
		char *s;

		len = strlen(list);
		if (len >= strlen("pciVVVV,DDDD")) {
			s = strstr(list, "pci");

			/*
			 * check if the string is something like pciVVVV,DDDD.RR
			 * or just pciVVVV,DDDD
			 */
			if (s && s[7] == ',' &&
			    (s[12] == '.' || s[12] == 0)) {
				s += 3;
				*vendor = simple_strtol(s, NULL, 16);