#include <libfdt.h>
#include <fdtdec.h>
+#include <asm/gpio.h>
+
DECLARE_GLOBAL_DATA_PTR;
/*
#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_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"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
return compat_names[id];
}
-/**
- * Look in the FDT for an alias with the given name and return its node.
- *
- * @param blob FDT blob
- * @param name alias name to look up
- * @return node offset if found, or an error code < 0 otherwise
- */
-static int find_alias_node(const void *blob, const char *name)
-{
- const char *path;
- int alias_node;
-
- debug("find_alias_node: %s\n", name);
- alias_node = fdt_path_offset(blob, "/aliases");
- if (alias_node < 0)
- return alias_node;
- path = fdt_getprop(blob, alias_node, name, NULL);
- if (!path)
- return -FDT_ERR_NOTFOUND;
- return fdt_path_offset(blob, path);
-}
-
fdt_addr_t fdtdec_get_addr(const void *blob, int node,
const char *prop_name)
{
const fdt_addr_t *cell;
int len;
- debug("get_addr: %s\n", prop_name);
+ debug("%s: %s: ", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (cell && (len == sizeof(fdt_addr_t) ||
- len == sizeof(fdt_addr_t) * 2))
- return fdt_addr_to_cpu(*cell);
+ len == sizeof(fdt_addr_t) * 2)) {
+ fdt_addr_t addr = fdt_addr_to_cpu(*cell);
+
+ debug("%p\n", (void *)addr);
+ return addr;
+ }
+ debug("(not found)\n");
return FDT_ADDR_T_NONE;
}
const s32 *cell;
int len;
- debug("get_size: %s\n", prop_name);
+ debug("%s: %s: ", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
- if (cell && len >= sizeof(s32))
- return fdt32_to_cpu(cell[0]);
+ 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;
return 1;
}
-enum fdt_compat_id fd_dec_lookup(const void *blob, int node)
+enum fdt_compat_id fdtdec_lookup(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)
{
/* snprintf() is not available */
assert(strlen(name) < MAX_STR_LEN);
sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
- node = find_alias_node(blob, str);
+ node = fdt_path_offset(blob, str);
if (node < 0)
return node;
err = fdt_node_check_compatible(blob, node, compat_names[id]);
return node;
}
-/* TODO: Can we tighten this code up a little? */
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];
__func__, name);
/* Now find all the aliases */
- memset(node_list, '\0', sizeof(*node_list) * maxcount);
-
for (offset = fdt_first_property_offset(blob, alias_node);
offset > 0;
offset = fdt_next_property_offset(blob, offset)) {
* 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[j] = 0;
+ nodes[found] = 0;
}
/* Add any nodes not mentioned by an alias */
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_check_fdt(void)
+int fdtdec_prepare_fdt(void)
{
- /* We must have an fdt */
- if (((uintptr_t)gd->fdt_blob & 3) || fdt_check_header(gd->fdt_blob))
- panic("No valid fdt found - please append one to U-Boot\n"
- "binary or define CONFIG_OF_EMBED\n");
+ if (((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\n");
+ return -1;
+ }
return 0;
}
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;
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;
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 = (void *)fdt_addr_to_cpu(*cell);
+ *size = fdt_size_to_cpu(cell[1]);
+ debug("%s: size=%zx\n", __func__, *size);
+ return 0;
+}
projects / karo-tx-uboot.git / blobdiff