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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2013 Google, Inc
- *
- * (C) Copyright 2012
- * Pavel Herrmann <morpheus.ibis@gmail.com>
- */
- #include <common.h>
- #include <errno.h>
- #include <fdtdec.h>
- #include <log.h>
- #include <malloc.h>
- #include <linux/libfdt.h>
- #include <dm/acpi.h>
- #include <dm/device.h>
- #include <dm/device-internal.h>
- #include <dm/lists.h>
- #include <dm/of.h>
- #include <dm/of_access.h>
- #include <dm/platdata.h>
- #include <dm/read.h>
- #include <dm/root.h>
- #include <dm/uclass.h>
- #include <dm/util.h>
- #include <linux/list.h>
- DECLARE_GLOBAL_DATA_PTR;
- static struct driver_info root_info = {
- .name = "root_driver",
- };
- struct udevice *dm_root(void)
- {
- if (!gd->dm_root) {
- dm_warn("Virtual root driver does not exist!\n");
- return NULL;
- }
- return gd->dm_root;
- }
- void dm_fixup_for_gd_move(struct global_data *new_gd)
- {
- /* The sentinel node has moved, so update things that point to it */
- if (gd->dm_root) {
- new_gd->uclass_root.next->prev = &new_gd->uclass_root;
- new_gd->uclass_root.prev->next = &new_gd->uclass_root;
- }
- }
- void fix_drivers(void)
- {
- struct driver *drv =
- ll_entry_start(struct driver, driver);
- const int n_ents = ll_entry_count(struct driver, driver);
- struct driver *entry;
- for (entry = drv; entry != drv + n_ents; entry++) {
- if (entry->of_match)
- entry->of_match = (const struct udevice_id *)
- ((ulong)entry->of_match + gd->reloc_off);
- if (entry->bind)
- entry->bind += gd->reloc_off;
- if (entry->probe)
- entry->probe += gd->reloc_off;
- if (entry->remove)
- entry->remove += gd->reloc_off;
- if (entry->unbind)
- entry->unbind += gd->reloc_off;
- if (entry->ofdata_to_platdata)
- entry->ofdata_to_platdata += gd->reloc_off;
- if (entry->child_post_bind)
- entry->child_post_bind += gd->reloc_off;
- if (entry->child_pre_probe)
- entry->child_pre_probe += gd->reloc_off;
- if (entry->child_post_remove)
- entry->child_post_remove += gd->reloc_off;
- /* OPS are fixed in every uclass post_probe function */
- if (entry->ops)
- entry->ops += gd->reloc_off;
- }
- }
- void fix_uclass(void)
- {
- struct uclass_driver *uclass =
- ll_entry_start(struct uclass_driver, uclass);
- const int n_ents = ll_entry_count(struct uclass_driver, uclass);
- struct uclass_driver *entry;
- for (entry = uclass; entry != uclass + n_ents; entry++) {
- if (entry->post_bind)
- entry->post_bind += gd->reloc_off;
- if (entry->pre_unbind)
- entry->pre_unbind += gd->reloc_off;
- if (entry->pre_probe)
- entry->pre_probe += gd->reloc_off;
- if (entry->post_probe)
- entry->post_probe += gd->reloc_off;
- if (entry->pre_remove)
- entry->pre_remove += gd->reloc_off;
- if (entry->child_post_bind)
- entry->child_post_bind += gd->reloc_off;
- if (entry->child_pre_probe)
- entry->child_pre_probe += gd->reloc_off;
- if (entry->init)
- entry->init += gd->reloc_off;
- if (entry->destroy)
- entry->destroy += gd->reloc_off;
- /* FIXME maybe also need to fix these ops */
- if (entry->ops)
- entry->ops += gd->reloc_off;
- }
- }
- void fix_devices(void)
- {
- struct driver_info *dev =
- ll_entry_start(struct driver_info, driver_info);
- const int n_ents = ll_entry_count(struct driver_info, driver_info);
- struct driver_info *entry;
- for (entry = dev; entry != dev + n_ents; entry++) {
- if (entry->plat)
- entry->plat += gd->reloc_off;
- }
- }
- int dm_init(bool of_live)
- {
- int ret;
- if (gd->dm_root) {
- dm_warn("Virtual root driver already exists!\n");
- return -EINVAL;
- }
- INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
- if (IS_ENABLED(CONFIG_NEEDS_MANUAL_RELOC)) {
- fix_drivers();
- fix_uclass();
- fix_devices();
- }
- ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
- if (ret)
- return ret;
- if (CONFIG_IS_ENABLED(OF_CONTROL))
- DM_ROOT_NON_CONST->node = ofnode_root();
- ret = device_probe(DM_ROOT_NON_CONST);
- if (ret)
- return ret;
- return 0;
- }
- int dm_uninit(void)
- {
- device_remove(dm_root(), DM_REMOVE_NORMAL);
- device_unbind(dm_root());
- gd->dm_root = NULL;
- return 0;
- }
- #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
- int dm_remove_devices_flags(uint flags)
- {
- device_remove(dm_root(), flags);
- return 0;
- }
- #endif
- int dm_scan_platdata(bool pre_reloc_only)
- {
- int ret;
- if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
- struct driver_rt *dyn;
- int n_ents;
- n_ents = ll_entry_count(struct driver_info, driver_info);
- dyn = calloc(n_ents, sizeof(struct driver_rt));
- if (!dyn)
- return -ENOMEM;
- gd_set_dm_driver_rt(dyn);
- }
- ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
- if (ret == -ENOENT) {
- dm_warn("Some drivers were not found\n");
- ret = 0;
- }
- return ret;
- }
- #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
- /**
- * dm_scan_fdt_node() - Scan the device tree and bind drivers for a node
- *
- * This scans the subnodes of a device tree node and and creates a driver
- * for each one.
- *
- * @parent: Parent device for the devices that will be created
- * @node: Node to scan
- * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
- * flag. If false bind all drivers.
- * @return 0 if OK, -ve on error
- */
- static int dm_scan_fdt_node(struct udevice *parent, ofnode parent_node,
- bool pre_reloc_only)
- {
- int ret = 0, err;
- ofnode node;
- if (!ofnode_valid(parent_node))
- return 0;
- for (node = ofnode_first_subnode(parent_node);
- ofnode_valid(node);
- node = ofnode_next_subnode(node)) {
- const char *node_name = ofnode_get_name(node);
- if (!ofnode_is_enabled(node)) {
- pr_debug(" - ignoring disabled device\n");
- continue;
- }
- err = lists_bind_fdt(parent, node, NULL, pre_reloc_only);
- if (err && !ret) {
- ret = err;
- debug("%s: ret=%d\n", node_name, ret);
- }
- }
- if (ret)
- dm_warn("Some drivers failed to bind\n");
- return ret;
- }
- int dm_scan_fdt_dev(struct udevice *dev)
- {
- return dm_scan_fdt_node(dev, dev_ofnode(dev),
- gd->flags & GD_FLG_RELOC ? false : true);
- }
- int dm_scan_fdt(bool pre_reloc_only)
- {
- return dm_scan_fdt_node(gd->dm_root, ofnode_root(), pre_reloc_only);
- }
- static int dm_scan_fdt_ofnode_path(const char *path, bool pre_reloc_only)
- {
- ofnode node;
- node = ofnode_path(path);
- return dm_scan_fdt_node(gd->dm_root, node, pre_reloc_only);
- }
- int dm_extended_scan(bool pre_reloc_only)
- {
- int ret, i;
- const char * const nodes[] = {
- "/chosen",
- "/clocks",
- "/firmware"
- };
- ret = dm_scan_fdt(pre_reloc_only);
- if (ret) {
- debug("dm_scan_fdt() failed: %d\n", ret);
- return ret;
- }
- /* Some nodes aren't devices themselves but may contain some */
- for (i = 0; i < ARRAY_SIZE(nodes); i++) {
- ret = dm_scan_fdt_ofnode_path(nodes[i], pre_reloc_only);
- if (ret) {
- debug("dm_scan_fdt() scan for %s failed: %d\n",
- nodes[i], ret);
- return ret;
- }
- }
- return ret;
- }
- #endif
- __weak int dm_scan_other(bool pre_reloc_only)
- {
- return 0;
- }
- int dm_init_and_scan(bool pre_reloc_only)
- {
- int ret;
- if (CONFIG_IS_ENABLED(OF_PLATDATA))
- dm_populate_phandle_data();
- ret = dm_init(CONFIG_IS_ENABLED(OF_LIVE));
- if (ret) {
- debug("dm_init() failed: %d\n", ret);
- return ret;
- }
- ret = dm_scan_platdata(pre_reloc_only);
- if (ret) {
- debug("dm_scan_platdata() failed: %d\n", ret);
- return ret;
- }
- if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
- ret = dm_extended_scan(pre_reloc_only);
- if (ret) {
- debug("dm_extended_scan() failed: %d\n", ret);
- return ret;
- }
- }
- ret = dm_scan_other(pre_reloc_only);
- if (ret)
- return ret;
- return 0;
- }
- #ifdef CONFIG_ACPIGEN
- static int root_acpi_get_name(const struct udevice *dev, char *out_name)
- {
- return acpi_copy_name(out_name, "\\_SB");
- }
- struct acpi_ops root_acpi_ops = {
- .get_name = root_acpi_get_name,
- };
- #endif
- /* This is the root driver - all drivers are children of this */
- U_BOOT_DRIVER(root_driver) = {
- .name = "root_driver",
- .id = UCLASS_ROOT,
- ACPI_OPS_PTR(&root_acpi_ops)
- };
- /* This is the root uclass */
- UCLASS_DRIVER(root) = {
- .name = "root",
- .id = UCLASS_ROOT,
- };
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