avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/core/uclass.c

@@ -0,0 +1,550 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * (C) Copyright 2012
+ * Pavel Herrmann <morpheus.ibis@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <malloc.h>
+#include <dm/device.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/uclass.h>
+#include <dm/uclass-internal.h>
+#include <dm/util.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct uclass *uclass_find(enum uclass_id key)
+{
+	struct uclass *uc;
+
+	if (!gd->dm_root)
+		return NULL;
+	/*
+	 * TODO(sjg@chromium.org): Optimise this, perhaps moving the found
+	 * node to the start of the list, or creating a linear array mapping
+	 * id to node.
+	 */
+	list_for_each_entry(uc, &gd->uclass_root, sibling_node) {
+		if (uc->uc_drv->id == key)
+			return uc;
+	}
+
+	return NULL;
+}
+
+/**
+ * uclass_add() - Create new uclass in list
+ * @id: Id number to create
+ * @ucp: Returns pointer to uclass, or NULL on error
+ * @return 0 on success, -ve on error
+ *
+ * The new uclass is added to the list. There must be only one uclass for
+ * each id.
+ */
+static int uclass_add(enum uclass_id id, struct uclass **ucp)
+{
+	struct uclass_driver *uc_drv;
+	struct uclass *uc;
+	int ret;
+
+	*ucp = NULL;
+	uc_drv = lists_uclass_lookup(id);
+	if (!uc_drv) {
+		debug("Cannot find uclass for id %d: please add the UCLASS_DRIVER() declaration for this UCLASS_... id\n",
+		      id);
+		/*
+		 * Use a strange error to make this case easier to find. When
+		 * a uclass is not available it can prevent driver model from
+		 * starting up and this failure is otherwise hard to debug.
+		 */
+		return -EPFNOSUPPORT;
+	}
+	uc = calloc(1, sizeof(*uc));
+	if (!uc)
+		return -ENOMEM;
+	if (uc_drv->priv_auto_alloc_size) {
+		uc->priv = calloc(1, uc_drv->priv_auto_alloc_size);
+		if (!uc->priv) {
+			ret = -ENOMEM;
+			goto fail_mem;
+		}
+	}
+	uc->uc_drv = uc_drv;
+	INIT_LIST_HEAD(&uc->sibling_node);
+	INIT_LIST_HEAD(&uc->dev_head);
+	list_add(&uc->sibling_node, &DM_UCLASS_ROOT_NON_CONST);
+
+	if (uc_drv->init) {
+		ret = uc_drv->init(uc);
+		if (ret)
+			goto fail;
+	}
+
+	*ucp = uc;
+
+	return 0;
+fail:
+	if (uc_drv->priv_auto_alloc_size) {
+		free(uc->priv);
+		uc->priv = NULL;
+	}
+	list_del(&uc->sibling_node);
+fail_mem:
+	free(uc);
+
+	return ret;
+}
+
+int uclass_destroy(struct uclass *uc)
+{
+	struct uclass_driver *uc_drv;
+	struct udevice *dev;
+	int ret;
+
+	/*
+	 * We cannot use list_for_each_entry_safe() here. If a device in this
+	 * uclass has a child device also in this uclass, it will be also be
+	 * unbound (by the recursion in the call to device_unbind() below).
+	 * We can loop until the list is empty.
+	 */
+	while (!list_empty(&uc->dev_head)) {
+		dev = list_first_entry(&uc->dev_head, struct udevice,
+				       uclass_node);
+		ret = device_remove(dev);
+		if (ret)
+			return ret;
+		ret = device_unbind(dev);
+		if (ret)
+			return ret;
+	}
+
+	uc_drv = uc->uc_drv;
+	if (uc_drv->destroy)
+		uc_drv->destroy(uc);
+	list_del(&uc->sibling_node);
+	if (uc_drv->priv_auto_alloc_size)
+		free(uc->priv);
+	free(uc);
+
+	return 0;
+}
+
+int uclass_get(enum uclass_id id, struct uclass **ucp)
+{
+	struct uclass *uc;
+
+	*ucp = NULL;
+	uc = uclass_find(id);
+	if (!uc)
+		return uclass_add(id, ucp);
+	*ucp = uc;
+
+	return 0;
+}
+
+int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
+{
+	struct uclass *uc;
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+	if (list_empty(&uc->dev_head))
+		return -ENODEV;
+
+	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+		if (!index--) {
+			*devp = dev;
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+
+int uclass_find_first_device(enum uclass_id id, struct udevice **devp)
+{
+	struct uclass *uc;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+	if (list_empty(&uc->dev_head))
+		return 0;
+
+	*devp = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
+
+	return 0;
+}
+
+int uclass_find_next_device(struct udevice **devp)
+{
+	struct udevice *dev = *devp;
+
+	*devp = NULL;
+	if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
+		return 0;
+
+	*devp = list_entry(dev->uclass_node.next, struct udevice, uclass_node);
+
+	return 0;
+}
+
+int uclass_find_device_by_name(enum uclass_id id, const char *name,
+			       struct udevice **devp)
+{
+	struct uclass *uc;
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	if (!name)
+		return -EINVAL;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+
+	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+		if (!strncmp(dev->name, name, strlen(name))) {
+			*devp = dev;
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+
+int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
+			      bool find_req_seq, struct udevice **devp)
+{
+	struct uclass *uc;
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	debug("%s: %d %d\n", __func__, find_req_seq, seq_or_req_seq);
+	if (seq_or_req_seq == -1)
+		return -ENODEV;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+
+	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+		debug("   - %d %d\n", dev->req_seq, dev->seq);
+		if ((find_req_seq ? dev->req_seq : dev->seq) ==
+				seq_or_req_seq) {
+			*devp = dev;
+			debug("   - found\n");
+			return 0;
+		}
+	}
+	debug("   - not found\n");
+
+	return -ENODEV;
+}
+
+int uclass_find_device_by_of_offset(enum uclass_id id, int node,
+				    struct udevice **devp)
+{
+	struct uclass *uc;
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	if (node < 0)
+		return -ENODEV;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+
+	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+		if (dev->of_offset == node) {
+			*devp = dev;
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int uclass_find_device_by_phandle(enum uclass_id id,
+					 struct udevice *parent,
+					 const char *name,
+					 struct udevice **devp)
+{
+	struct udevice *dev;
+	struct uclass *uc;
+	int find_phandle;
+	int ret;
+
+	*devp = NULL;
+	find_phandle = fdtdec_get_int(gd->fdt_blob, parent->of_offset, name,
+				      -1);
+	if (find_phandle <= 0)
+		return -ENOENT;
+	ret = uclass_get(id, &uc);
+	if (ret)
+		return ret;
+
+	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+		uint phandle = fdt_get_phandle(gd->fdt_blob, dev->of_offset);
+
+		if (phandle == find_phandle) {
+			*devp = dev;
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+#endif
+
+int uclass_get_device_tail(struct udevice *dev, int ret,
+				  struct udevice **devp)
+{
+	if (ret)
+		return ret;
+
+	assert(dev);
+	ret = device_probe(dev);
+	if (ret)
+		return ret;
+
+	*devp = dev;
+
+	return 0;
+}
+
+int uclass_get_device(enum uclass_id id, int index, struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_device(id, index, &dev);
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+int uclass_get_device_by_name(enum uclass_id id, const char *name,
+			      struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_device_by_name(id, name, &dev);
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_device_by_seq(id, seq, false, &dev);
+	if (ret == -ENODEV) {
+		/*
+		 * We didn't find it in probed devices. See if there is one
+		 * that will request this seq if probed.
+		 */
+		ret = uclass_find_device_by_seq(id, seq, true, &dev);
+	}
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+int uclass_get_device_by_of_offset(enum uclass_id id, int node,
+				   struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_device_by_of_offset(id, node, &dev);
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent,
+				 const char *name, struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_device_by_phandle(id, parent, name, &dev);
+	return uclass_get_device_tail(dev, ret, devp);
+}
+#endif
+
+int uclass_first_device(enum uclass_id id, struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_first_device(id, &dev);
+	if (!dev)
+		return 0;
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+int uclass_first_device_err(enum uclass_id id, struct udevice **devp)
+{
+	int ret;
+
+	ret = uclass_first_device(id, devp);
+	if (ret)
+		return ret;
+	else if (!*devp)
+		return -ENODEV;
+
+	return 0;
+}
+
+int uclass_next_device(struct udevice **devp)
+{
+	struct udevice *dev = *devp;
+	int ret;
+
+	*devp = NULL;
+	ret = uclass_find_next_device(&dev);
+	if (!dev)
+		return 0;
+	return uclass_get_device_tail(dev, ret, devp);
+}
+
+int uclass_bind_device(struct udevice *dev)
+{
+	struct uclass *uc;
+	int ret;
+
+	uc = dev->uclass;
+	list_add_tail(&dev->uclass_node, &uc->dev_head);
+
+	if (dev->parent) {
+		struct uclass_driver *uc_drv = dev->parent->uclass->uc_drv;
+
+		if (uc_drv->child_post_bind) {
+			ret = uc_drv->child_post_bind(dev);
+			if (ret)
+				goto err;
+		}
+	}
+
+	return 0;
+err:
+	/* There is no need to undo the parent's post_bind call */
+	list_del(&dev->uclass_node);
+
+	return ret;
+}
+
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int uclass_unbind_device(struct udevice *dev)
+{
+	struct uclass *uc;
+	int ret;
+
+	uc = dev->uclass;
+	if (uc->uc_drv->pre_unbind) {
+		ret = uc->uc_drv->pre_unbind(dev);
+		if (ret)
+			return ret;
+	}
+
+	list_del(&dev->uclass_node);
+	return 0;
+}
+#endif
+
+int uclass_resolve_seq(struct udevice *dev)
+{
+	struct udevice *dup;
+	int seq;
+	int ret;
+
+	assert(dev->seq == -1);
+	ret = uclass_find_device_by_seq(dev->uclass->uc_drv->id, dev->req_seq,
+					false, &dup);
+	if (!ret) {
+		dm_warn("Device '%s': seq %d is in use by '%s'\n",
+			dev->name, dev->req_seq, dup->name);
+	} else if (ret == -ENODEV) {
+		/* Our requested sequence number is available */
+		if (dev->req_seq != -1)
+			return dev->req_seq;
+	} else {
+		return ret;
+	}
+
+	for (seq = 0; seq < DM_MAX_SEQ; seq++) {
+		ret = uclass_find_device_by_seq(dev->uclass->uc_drv->id, seq,
+						false, &dup);
+		if (ret == -ENODEV)
+			break;
+		if (ret)
+			return ret;
+	}
+	return seq;
+}
+
+int uclass_pre_probe_device(struct udevice *dev)
+{
+	struct uclass_driver *uc_drv;
+	int ret;
+
+	uc_drv = dev->uclass->uc_drv;
+	if (uc_drv->pre_probe) {
+		ret = uc_drv->pre_probe(dev);
+		if (ret)
+			return ret;
+	}
+
+	if (!dev->parent)
+		return 0;
+	uc_drv = dev->parent->uclass->uc_drv;
+	if (uc_drv->child_pre_probe)
+		return uc_drv->child_pre_probe(dev);
+
+	return 0;
+}
+
+int uclass_post_probe_device(struct udevice *dev)
+{
+	struct uclass_driver *uc_drv = dev->uclass->uc_drv;
+
+	if (uc_drv->post_probe)
+		return uc_drv->post_probe(dev);
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int uclass_pre_remove_device(struct udevice *dev)
+{
+	struct uclass *uc;
+	int ret;
+
+	uc = dev->uclass;
+	if (uc->uc_drv->pre_remove) {
+		ret = uc->uc_drv->pre_remove(dev);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif