mirror of
https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
290 lines
6.3 KiB
C
290 lines
6.3 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <malloc.h>
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#include <libfdt.h>
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#include <dm/device.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/platdata.h>
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#include <dm/root.h>
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#include <dm/uclass.h>
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#include <dm/util.h>
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#include <linux/list.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct root_priv {
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fdt_addr_t translation_offset; /* optional translation offset */
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};
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static const struct driver_info root_info = {
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.name = "root_driver",
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};
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struct udevice *dm_root(void)
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{
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if (!gd->dm_root) {
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dm_warn("Virtual root driver does not exist!\n");
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return NULL;
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}
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return gd->dm_root;
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}
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void dm_fixup_for_gd_move(struct global_data *new_gd)
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{
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/* The sentinel node has moved, so update things that point to it */
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new_gd->uclass_root.next->prev = &new_gd->uclass_root;
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new_gd->uclass_root.prev->next = &new_gd->uclass_root;
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}
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fdt_addr_t dm_get_translation_offset(void)
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{
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struct udevice *root = dm_root();
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struct root_priv *priv = dev_get_priv(root);
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return priv->translation_offset;
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}
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void dm_set_translation_offset(fdt_addr_t offs)
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{
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struct udevice *root = dm_root();
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struct root_priv *priv = dev_get_priv(root);
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priv->translation_offset = offs;
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}
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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void fix_drivers(void)
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{
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struct driver *drv =
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ll_entry_start(struct driver, driver);
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const int n_ents = ll_entry_count(struct driver, driver);
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struct driver *entry;
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (entry->of_match)
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entry->of_match = (const struct udevice_id *)
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((u32)entry->of_match + gd->reloc_off);
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if (entry->bind)
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entry->bind += gd->reloc_off;
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if (entry->probe)
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entry->probe += gd->reloc_off;
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if (entry->remove)
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entry->remove += gd->reloc_off;
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if (entry->unbind)
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entry->unbind += gd->reloc_off;
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if (entry->ofdata_to_platdata)
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entry->ofdata_to_platdata += gd->reloc_off;
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if (entry->child_post_bind)
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entry->child_post_bind += gd->reloc_off;
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if (entry->child_pre_probe)
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entry->child_pre_probe += gd->reloc_off;
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if (entry->child_post_remove)
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entry->child_post_remove += gd->reloc_off;
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/* OPS are fixed in every uclass post_probe function */
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if (entry->ops)
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entry->ops += gd->reloc_off;
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}
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}
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void fix_uclass(void)
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{
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struct uclass_driver *uclass =
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ll_entry_start(struct uclass_driver, uclass);
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const int n_ents = ll_entry_count(struct uclass_driver, uclass);
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struct uclass_driver *entry;
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for (entry = uclass; entry != uclass + n_ents; entry++) {
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if (entry->post_bind)
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entry->post_bind += gd->reloc_off;
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if (entry->pre_unbind)
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entry->pre_unbind += gd->reloc_off;
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if (entry->pre_probe)
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entry->pre_probe += gd->reloc_off;
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if (entry->post_probe)
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entry->post_probe += gd->reloc_off;
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if (entry->pre_remove)
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entry->pre_remove += gd->reloc_off;
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if (entry->child_post_bind)
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entry->child_post_bind += gd->reloc_off;
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if (entry->child_pre_probe)
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entry->child_pre_probe += gd->reloc_off;
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if (entry->init)
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entry->init += gd->reloc_off;
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if (entry->destroy)
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entry->destroy += gd->reloc_off;
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/* FIXME maybe also need to fix these ops */
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if (entry->ops)
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entry->ops += gd->reloc_off;
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}
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}
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void fix_devices(void)
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{
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struct driver_info *dev =
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ll_entry_start(struct driver_info, driver_info);
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const int n_ents = ll_entry_count(struct driver_info, driver_info);
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struct driver_info *entry;
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for (entry = dev; entry != dev + n_ents; entry++) {
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if (entry->platdata)
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entry->platdata += gd->reloc_off;
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}
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}
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#endif
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int dm_init(void)
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{
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int ret;
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if (gd->dm_root) {
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dm_warn("Virtual root driver already exists!\n");
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return -EINVAL;
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}
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INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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fix_drivers();
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fix_uclass();
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fix_devices();
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#endif
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ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
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if (ret)
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return ret;
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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DM_ROOT_NON_CONST->of_offset = 0;
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#endif
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ret = device_probe(DM_ROOT_NON_CONST);
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if (ret)
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return ret;
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return 0;
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}
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int dm_uninit(void)
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{
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device_remove(dm_root());
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device_unbind(dm_root());
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return 0;
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}
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int dm_scan_platdata(bool pre_reloc_only)
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{
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int ret;
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ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
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if (ret == -ENOENT) {
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dm_warn("Some drivers were not found\n");
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ret = 0;
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}
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return ret;
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}
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#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
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int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
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bool pre_reloc_only)
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{
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int ret = 0, err;
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for (offset = fdt_first_subnode(blob, offset);
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offset > 0;
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offset = fdt_next_subnode(blob, offset)) {
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if (pre_reloc_only &&
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!fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
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continue;
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if (!fdtdec_get_is_enabled(blob, offset)) {
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dm_dbg(" - ignoring disabled device\n");
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continue;
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}
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err = lists_bind_fdt(parent, blob, offset, NULL);
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if (err && !ret) {
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ret = err;
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debug("%s: ret=%d\n", fdt_get_name(blob, offset, NULL),
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ret);
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}
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}
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if (ret)
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dm_warn("Some drivers failed to bind\n");
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return ret;
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}
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int dm_scan_fdt_dev(struct udevice *dev)
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{
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if (dev_of_offset(dev) == -1)
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return 0;
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return dm_scan_fdt_node(dev, gd->fdt_blob, dev_of_offset(dev),
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gd->flags & GD_FLG_RELOC ? false : true);
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}
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int dm_scan_fdt(const void *blob, bool pre_reloc_only)
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{
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return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
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}
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#endif
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__weak int dm_scan_other(bool pre_reloc_only)
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{
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return 0;
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}
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int dm_init_and_scan(bool pre_reloc_only)
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{
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int ret;
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ret = dm_init();
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if (ret) {
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debug("dm_init() failed: %d\n", ret);
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return ret;
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}
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ret = dm_scan_platdata(pre_reloc_only);
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if (ret) {
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debug("dm_scan_platdata() failed: %d\n", ret);
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return ret;
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}
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if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
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ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
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if (ret) {
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debug("dm_scan_fdt() failed: %d\n", ret);
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return ret;
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}
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}
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ret = dm_scan_other(pre_reloc_only);
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if (ret)
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return ret;
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return 0;
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}
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/* This is the root driver - all drivers are children of this */
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U_BOOT_DRIVER(root_driver) = {
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.name = "root_driver",
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.id = UCLASS_ROOT,
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.priv_auto_alloc_size = sizeof(struct root_priv),
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};
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/* This is the root uclass */
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UCLASS_DRIVER(root) = {
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.name = "root",
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.id = UCLASS_ROOT,
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};
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