--- /dev/null
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef USE_HOSTCC
+#include <common.h>
+#include <serial.h>
+#include <libfdt.h>
+#include <fdtdec.h>
+
+#include <asm/gpio.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_TEGRA114_I2C, "nvidia,tegra114-i2c"),
+ COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
+ COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
+ 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_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
+ COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
+ COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
+ 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(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
+ COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
+ COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
+ COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
+ COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
+ 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_EXYNOS5_DWMMC, "samsung,exynos5250-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_HOST_EMULATION, "sandbox,host-emulation"),
+ COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
+};
+
+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);
+}
+
+s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
+ s32 default_val)
+{
+ const s32 *cell;
+ int len;
+
+ debug("%s: %s: ", __func__, prop_name);
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ if (cell && len >= sizeof(s32)) {
+ s32 val = fdt32_to_cpu(cell[0]);
+
+ debug("%#x (%d)\n", val, val);
+ return val;
+ }
+ debug("(not found)\n");
+ return default_val;
+}
+
+uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
+ uint64_t default_val)
+{
+ const uint64_t *cell64;
+ int length;
+
+ cell64 = fdt_getprop(blob, node, prop_name, &length);
+ if (!cell64 || length < sizeof(*cell64))
+ return default_val;
+
+ return fdt64_to_cpu(*cell64);
+}
+
+int fdtdec_get_is_enabled(const void *blob, int node)
+{
+ const char *cell;
+
+ /*
+ * It should say "okay", so only allow that. Some fdts use "ok" but
+ * this is a bug. Please fix your device tree source file. See here
+ * for discussion:
+ *
+ * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
+ */
+ cell = fdt_getprop(blob, node, "status", NULL);
+ if (cell)
+ return 0 == strcmp(cell, "okay");
+ return 1;
+}
+
+enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
+{
+ enum fdt_compat_id id;
+
+ /* Search our drivers */
+ for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
+ if (0 == fdt_node_check_compatible(blob, node,
+ compat_names[id]))
+ return id;
+ return COMPAT_UNKNOWN;
+}
+
+int fdtdec_next_compatible(const void *blob, int node,
+ enum fdt_compat_id id)
+{
+ return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
+}
+
+int fdtdec_next_compatible_subnode(const void *blob, int node,
+ enum fdt_compat_id id, int *depthp)
+{
+ do {
+ node = fdt_next_node(blob, node, depthp);
+ } while (*depthp > 1);
+
+ /* If this is a direct subnode, and compatible, return it */
+ if (*depthp == 1 && 0 == fdt_node_check_compatible(
+ blob, node, compat_names[id]))
+ return node;
+
+ return -FDT_ERR_NOTFOUND;
+}
+
+int fdtdec_next_alias(const void *blob, const char *name,
+ enum fdt_compat_id id, int *upto)
+{
+#define MAX_STR_LEN 20
+ char str[MAX_STR_LEN + 20];
+ int node, err;
+
+ /* snprintf() is not available */
+ assert(strlen(name) < MAX_STR_LEN);
+ sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
+ node = fdt_path_offset(blob, str);
+ if (node < 0)
+ return node;
+ err = fdt_node_check_compatible(blob, node, compat_names[id]);
+ if (err < 0)
+ return err;
+ if (err)
+ return -FDT_ERR_NOTFOUND;
+ (*upto)++;
+ return node;
+}
+
+int fdtdec_find_aliases_for_id(const void *blob, const char *name,
+ enum fdt_compat_id id, int *node_list, int maxcount)
+{
+ memset(node_list, '\0', sizeof(*node_list) * maxcount);
+
+ return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
+}
+
+/* TODO: Can we tighten this code up a little? */
+int fdtdec_add_aliases_for_id(const void *blob, const char *name,
+ enum fdt_compat_id id, int *node_list, int maxcount)
+{
+ int name_len = strlen(name);
+ int nodes[maxcount];
+ int num_found = 0;
+ int offset, node;
+ int alias_node;
+ int count;
+ int i, j;
+
+ /* find the alias node if present */
+ alias_node = fdt_path_offset(blob, "/aliases");
+
+ /*
+ * start with nothing, and we can assume that the root node can't
+ * match
+ */
+ memset(nodes, '\0', sizeof(nodes));
+
+ /* First find all the compatible nodes */
+ for (node = count = 0; node >= 0 && count < maxcount;) {
+ node = fdtdec_next_compatible(blob, node, id);
+ if (node >= 0)
+ nodes[count++] = node;
+ }
+ if (node >= 0)
+ debug("%s: warning: maxcount exceeded with alias '%s'\n",
+ __func__, name);
+
+ /* Now find all the aliases */
+ for (offset = fdt_first_property_offset(blob, alias_node);
+ offset > 0;
+ offset = fdt_next_property_offset(blob, offset)) {
+ const struct fdt_property *prop;
+ const char *path;
+ int number;
+ int found;
+
+ node = 0;
+ prop = fdt_get_property_by_offset(blob, offset, NULL);
+ path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
+ if (prop->len && 0 == strncmp(path, name, name_len))
+ node = fdt_path_offset(blob, prop->data);
+ if (node <= 0)
+ continue;
+
+ /* Get the alias number */
+ number = simple_strtoul(path + name_len, NULL, 10);
+ if (number < 0 || number >= maxcount) {
+ debug("%s: warning: alias '%s' is out of range\n",
+ __func__, path);
+ continue;
+ }
+
+ /* Make sure the node we found is actually in our list! */
+ found = -1;
+ for (j = 0; j < count; j++)
+ if (nodes[j] == node) {
+ found = j;
+ break;
+ }
+
+ if (found == -1) {
+ debug("%s: warning: alias '%s' points to a node "
+ "'%s' that is missing or is not compatible "
+ " with '%s'\n", __func__, path,
+ fdt_get_name(blob, node, NULL),
+ compat_names[id]);
+ continue;
+ }
+
+ /*
+ * Add this node to our list in the right place, and mark
+ * it as done.
+ */
+ if (fdtdec_get_is_enabled(blob, node)) {
+ if (node_list[number]) {
+ debug("%s: warning: alias '%s' requires that "
+ "a node be placed in the list in a "
+ "position which is already filled by "
+ "node '%s'\n", __func__, path,
+ fdt_get_name(blob, node, NULL));
+ continue;
+ }
+ node_list[number] = node;
+ if (number >= num_found)
+ num_found = number + 1;
+ }
+ nodes[found] = 0;
+ }
+
+ /* Add any nodes not mentioned by an alias */
+ for (i = j = 0; i < maxcount; i++) {
+ if (!node_list[i]) {
+ for (; j < maxcount; j++)
+ if (nodes[j] &&
+ fdtdec_get_is_enabled(blob, nodes[j]))
+ break;
+
+ /* Have we run out of nodes to add? */
+ if (j == maxcount)
+ break;
+
+ assert(!node_list[i]);
+ node_list[i] = nodes[j++];
+ if (i >= num_found)
+ num_found = i + 1;
+ }
+ }
+
+ return num_found;
+}
+
+int fdtdec_check_fdt(void)
+{
+ /*
+ * We must have an FDT, but we cannot panic() yet since the console
+ * is not ready. So for now, just assert(). Boards which need an early
+ * FDT (prior to console ready) will need to make their own
+ * arrangements and do their own checks.
+ */
+ assert(!fdtdec_prepare_fdt());
+ return 0;
+}
+
+/*
+ * This function is a little odd in that it accesses global data. At some
+ * point if the architecture board.c files merge this will make more sense.
+ * Even now, it is common code.
+ */
+int fdtdec_prepare_fdt(void)
+{
+ if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
+ fdt_check_header(gd->fdt_blob)) {
+ printf("No valid FDT found - please append one to U-Boot "
+ "binary, use u-boot-dtb.bin or define "
+ "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
+ return -1;
+ }
+ return 0;
+}
+
+int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
+{
+ const u32 *phandle;
+ int lookup;
+
+ debug("%s: %s\n", __func__, prop_name);
+ phandle = fdt_getprop(blob, node, prop_name, NULL);
+ if (!phandle)
+ return -FDT_ERR_NOTFOUND;
+
+ lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
+ return lookup;
+}
+
+/**
+ * Look up a property in a node and check that it has a minimum length.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @param min_len minimum property length in bytes
+ * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
+ found, or -FDT_ERR_BADLAYOUT if not enough data
+ * @return pointer to cell, which is only valid if err == 0
+ */
+static const void *get_prop_check_min_len(const void *blob, int node,
+ const char *prop_name, int min_len, int *err)
+{
+ const void *cell;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ if (!cell)
+ *err = -FDT_ERR_NOTFOUND;
+ else if (len < min_len)
+ *err = -FDT_ERR_BADLAYOUT;
+ else
+ *err = 0;
+ return cell;
+}
+
+int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
+ u32 *array, int count)
+{
+ const u32 *cell;
+ int i, err = 0;
+
+ debug("%s: %s\n", __func__, prop_name);
+ cell = get_prop_check_min_len(blob, node, prop_name,
+ sizeof(u32) * count, &err);
+ if (!err) {
+ for (i = 0; i < count; i++)
+ array[i] = fdt32_to_cpu(cell[i]);
+ }
+ return err;
+}
+
+const u32 *fdtdec_locate_array(const void *blob, int node,
+ const char *prop_name, int count)
+{
+ const u32 *cell;
+ int err;
+
+ cell = get_prop_check_min_len(blob, node, prop_name,
+ sizeof(u32) * count, &err);
+ return err ? NULL : cell;
+}
+
+int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
+{
+ const s32 *cell;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ return cell != NULL;
+}
+
+/**
+ * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
+ * terminating item.
+ *
+ * @param blob FDT blob to use
+ * @param node Node to look at
+ * @param prop_name Node property name
+ * @param gpio Array of gpio elements to fill from FDT. This will be
+ * untouched if either 0 or an error is returned
+ * @param max_count Maximum number of elements allowed
+ * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
+ * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
+ */
+int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
+ struct fdt_gpio_state *gpio, int max_count)
+{
+ const struct fdt_property *prop;
+ const u32 *cell;
+ const char *name;
+ int len, i;
+
+ debug("%s: %s\n", __func__, prop_name);
+ assert(max_count > 0);
+ prop = fdt_get_property(blob, node, prop_name, &len);
+ if (!prop) {
+ debug("%s: property '%s' missing\n", __func__, prop_name);
+ return -FDT_ERR_NOTFOUND;
+ }
+
+ /* We will use the name to tag the GPIO */
+ name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
+ cell = (u32 *)prop->data;
+ len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
+ if (len > max_count) {
+ debug(" %s: too many GPIOs / cells for "
+ "property '%s'\n", __func__, prop_name);
+ return -FDT_ERR_BADLAYOUT;
+ }
+
+ /* Read out the GPIO data from the cells */
+ for (i = 0; i < len; i++, cell += 3) {
+ gpio[i].gpio = fdt32_to_cpu(cell[1]);
+ gpio[i].flags = fdt32_to_cpu(cell[2]);
+ gpio[i].name = name;
+ }
+
+ return len;
+}
+
+int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
+ struct fdt_gpio_state *gpio)
+{
+ int err;
+
+ debug("%s: %s\n", __func__, prop_name);
+ gpio->gpio = FDT_GPIO_NONE;
+ gpio->name = NULL;
+ err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
+ return err == 1 ? 0 : err;
+}
+
+int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
+{
+ int val;
+
+ if (!fdt_gpio_isvalid(gpio))
+ return -1;
+
+ val = gpio_get_value(gpio->gpio);
+ return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
+}
+
+int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
+{
+ if (!fdt_gpio_isvalid(gpio))
+ return -1;
+
+ val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
+ return gpio_set_value(gpio->gpio, val);
+}
+
+int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
+{
+ /*
+ * Return success if there is no GPIO defined. This is used for
+ * optional GPIOs)
+ */
+ if (!fdt_gpio_isvalid(gpio))
+ return 0;
+
+ if (gpio_request(gpio->gpio, gpio->name))
+ return -1;
+ return 0;
+}
+
+int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
+ u8 *array, int count)
+{
+ const u8 *cell;
+ int err;
+
+ cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
+ if (!err)
+ memcpy(array, cell, count);
+ return err;
+}
+
+const u8 *fdtdec_locate_byte_array(const void *blob, int node,
+ const char *prop_name, int count)
+{
+ const u8 *cell;
+ int err;
+
+ cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
+ if (err)
+ return NULL;
+ return cell;
+}
+
+int fdtdec_get_config_int(const void *blob, const char *prop_name,
+ int default_val)
+{
+ int config_node;
+
+ debug("%s: %s\n", __func__, prop_name);
+ config_node = fdt_path_offset(blob, "/config");
+ if (config_node < 0)
+ return default_val;
+ return fdtdec_get_int(blob, config_node, prop_name, default_val);
+}
+
+int fdtdec_get_config_bool(const void *blob, const char *prop_name)
+{
+ int config_node;
+ const void *prop;
+
+ debug("%s: %s\n", __func__, prop_name);
+ config_node = fdt_path_offset(blob, "/config");
+ if (config_node < 0)
+ return 0;
+ prop = fdt_get_property(blob, config_node, prop_name, NULL);
+
+ return prop != NULL;
+}
+
+char *fdtdec_get_config_string(const void *blob, const char *prop_name)
+{
+ const char *nodep;
+ int nodeoffset;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ nodeoffset = fdt_path_offset(blob, "/config");
+ if (nodeoffset < 0)
+ return NULL;
+
+ nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
+ if (!nodep)
+ return NULL;
+
+ return (char *)nodep;
+}
+
+int fdtdec_decode_region(const void *blob, int node,
+ const char *prop_name, void **ptrp, size_t *size)
+{
+ const fdt_addr_t *cell;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ if (!cell || (len != sizeof(fdt_addr_t) * 2))
+ return -1;
+
+ *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size);
+ *size = fdt_size_to_cpu(cell[1]);
+ debug("%s: size=%zx\n", __func__, *size);
+ return 0;
+}
+
+/**
+ * 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)
+{
+ u32 reg[2];
+
+ if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
+ debug("Node '%s' has bad/missing 'reg' property\n", name);
+ return -FDT_ERR_NOTFOUND;
+ }
+ entry->offset = reg[0];
+ entry->length = reg[1];
+
+ return 0;
+}
+#else
+#include "libfdt.h"
+#include "fdt_support.h"
+
+int fdtdec_get_int(const void *blob, int node, const char *prop_name,
+ int default_val)
+{
+ const int *cell;
+ int len;
+
+ cell = fdt_getprop_w((void *)blob, node, prop_name, &len);
+ if (cell && len >= sizeof(int)) {
+ int val = fdt32_to_cpu(cell[0]);
+
+ return val;
+ }
+ return default_val;
+}
+#endif
Code Review / kvmfornfv.git / blobdiff