+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
+#define LOG_CATEGORY LOGC_DM
+
#include <common.h>
+#include <dm.h>
#include <errno.h>
+#include <log.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
*ucp = NULL;
uc_drv = lists_uclass_lookup(id);
if (!uc_drv) {
- dm_warn("Cannot find uclass for id %d: please add the UCLASS_DRIVER() declaration for this UCLASS_... id\n",
- id);
- return -ENOENT;
- }
- if (uc_drv->ops) {
- dm_warn("No ops for uclass id %d\n", id);
- return -EINVAL;
+ 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)
int uclass_destroy(struct uclass *uc)
{
struct uclass_driver *uc_drv;
- struct udevice *dev, *tmp;
+ struct udevice *dev;
int ret;
- list_for_each_entry_safe(dev, tmp, &uc->dev_head, uclass_node) {
- ret = device_remove(dev);
+ /*
+ * 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, DM_REMOVE_NORMAL | DM_REMOVE_NO_PD);
if (ret)
- return ret;
+ return log_msg_ret("remove", ret);
ret = device_unbind(dev);
if (ret)
- return ret;
+ return log_msg_ret("unbind", ret);
}
uc_drv = uc->uc_drv;
return 0;
}
+const char *uclass_get_name(enum uclass_id id)
+{
+ struct uclass *uc;
+
+ if (uclass_get(id, &uc))
+ return NULL;
+ return uc->uc_drv->name;
+}
+
+enum uclass_id uclass_get_by_name(const char *name)
+{
+ int i;
+
+ for (i = 0; i < UCLASS_COUNT; i++) {
+ struct uclass_driver *uc_drv = lists_uclass_lookup(i);
+
+ if (uc_drv && !strcmp(uc_drv->name, name))
+ return i;
+ }
+
+ return UCLASS_INVALID;
+}
+
+int dev_get_uclass_index(struct udevice *dev, struct uclass **ucp)
+{
+ struct udevice *iter;
+ struct uclass *uc = dev->uclass;
+ int i = 0;
+
+ if (list_empty(&uc->dev_head))
+ return -ENODEV;
+
+ uclass_foreach_dev(iter, uc) {
+ if (iter == dev) {
+ if (ucp)
+ *ucp = uc;
+ return i;
+ }
+ i++;
+ }
+
+ return -ENODEV;
+}
+
int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
{
struct uclass *uc;
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) {
+ uclass_foreach_dev(dev, uc) {
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;
+
+ uclass_foreach_dev(dev, uc) {
+ if (!strcmp(dev->name, name)) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int uclass_find_next_free_req_seq(enum uclass_id id)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+ int max = -1;
+
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ if ((dev->req_seq != -1) && (dev->req_seq > max))
+ max = dev->req_seq;
+ }
+
+ if (max == -1)
+ return 0;
+
+ return max + 1;
+}
+
int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp)
{
int ret;
*devp = NULL;
- debug("%s: %d %d\n", __func__, find_req_seq, seq_or_req_seq);
+ log_debug("%d %d\n", 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);
+ uclass_foreach_dev(dev, uc) {
+ log_debug(" - %d %d '%s'\n",
+ dev->req_seq, dev->seq, dev->name);
if ((find_req_seq ? dev->req_seq : dev->seq) ==
seq_or_req_seq) {
*devp = dev;
- debug(" - found\n");
+ log_debug(" - found\n");
return 0;
}
}
- debug(" - not found\n");
+ log_debug(" - not found\n");
return -ENODEV;
}
-static int uclass_find_device_by_of_offset(enum uclass_id id, int node,
- struct udevice **devp)
+int uclass_find_device_by_of_offset(enum uclass_id id, int node,
+ struct udevice **devp)
{
struct uclass *uc;
struct udevice *dev;
if (ret)
return ret;
- list_for_each_entry(dev, &uc->dev_head, uclass_node) {
- if (dev->of_offset == node) {
+ uclass_foreach_dev(dev, uc) {
+ if (dev_of_offset(dev) == node) {
*devp = dev;
return 0;
}
return -ENODEV;
}
-/**
- * uclass_get_device_tail() - handle the end of a get_device call
- *
- * This handles returning an error or probing a device as needed.
- *
- * @dev: Device that needs to be probed
- * @ret: Error to return. If non-zero then the device is not probed
- * @devp: Returns the value of 'dev' if there is no error
- * @return ret, if non-zero, else the result of the device_probe() call
- */
-static int uclass_get_device_tail(struct udevice *dev, int ret,
- struct udevice **devp)
+int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+
+ log(LOGC_DM, LOGL_DEBUG, "Looking for %s\n", ofnode_get_name(node));
+ *devp = NULL;
+ if (!ofnode_valid(node))
+ return -ENODEV;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ log(LOGC_DM, LOGL_DEBUG_CONTENT, " - checking %s\n",
+ dev->name);
+ if (ofnode_equal(dev_ofnode(dev), node)) {
+ *devp = dev;
+ goto done;
+ }
+ }
+ ret = -ENODEV;
+
+done:
+ log(LOGC_DM, LOGL_DEBUG, " - result for %s: %s (ret=%d)\n",
+ ofnode_get_name(node), *devp ? (*devp)->name : "(none)", ret);
+ return ret;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+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 = dev_read_u32_default(parent, name, -1);
+ if (find_phandle <= 0)
+ return -ENOENT;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ uint phandle;
+
+ phandle = dev_read_phandle(dev);
+
+ if (phandle == find_phandle) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+#endif
+
+int uclass_get_device_by_driver(enum uclass_id id,
+ const struct driver *find_drv,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ int ret;
+
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ if (dev->driver == find_drv)
+ return uclass_get_device_tail(dev, 0, devp);
+ }
+
+ return -ENODEV;
+}
+
+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;
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;
return uclass_get_device_tail(dev, ret, devp);
}
-int uclass_first_device(enum uclass_id id, struct udevice **devp)
+int uclass_get_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ log(LOGC_DM, LOGL_DEBUG, "Looking for %s\n", ofnode_get_name(node));
+ *devp = NULL;
+ ret = uclass_find_device_by_ofnode(id, node, &dev);
+ log(LOGC_DM, LOGL_DEBUG, " - result for %s: %s (ret=%d)\n",
+ ofnode_get_name(node), dev ? dev->name : "(none)", ret);
+
+ return uclass_get_device_tail(dev, ret, devp);
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+int uclass_get_device_by_phandle_id(enum uclass_id id, uint phandle_id,
+ struct udevice **devp)
{
- struct uclass *uc;
struct udevice *dev;
+ struct uclass *uc;
int ret;
*devp = NULL;
ret = uclass_get(id, &uc);
if (ret)
return ret;
- if (list_empty(&uc->dev_head))
+
+ uclass_foreach_dev(dev, uc) {
+ uint phandle;
+
+ phandle = dev_read_phandle(dev);
+
+ if (phandle == phandle_id) {
+ *devp = dev;
+ return uclass_get_device_tail(dev, ret, devp);
+ }
+ }
+
+ return -ENODEV;
+}
+
+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);
+}
- dev = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
- ret = device_probe(dev);
+int uclass_first_device_err(enum uclass_id id, struct udevice **devp)
+{
+ int ret;
+
+ ret = uclass_first_device(id, devp);
if (ret)
return ret;
- *devp = dev;
+ else if (!*devp)
+ return -ENODEV;
return 0;
}
int ret;
*devp = NULL;
- if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
+ ret = uclass_find_next_device(&dev);
+ if (!dev)
return 0;
+ return uclass_get_device_tail(dev, ret, devp);
+}
- dev = list_entry(dev->uclass_node.next, struct udevice,
- uclass_node);
- ret = device_probe(dev);
+int uclass_next_device_err(struct udevice **devp)
+{
+ int ret;
+
+ ret = uclass_next_device(devp);
if (ret)
return ret;
- *devp = dev;
+ else if (!*devp)
+ return -ENODEV;
return 0;
}
+int uclass_first_device_check(enum uclass_id id, struct udevice **devp)
+{
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_first_device(id, devp);
+ if (ret)
+ return ret;
+ if (!*devp)
+ return 0;
+
+ return device_probe(*devp);
+}
+
+int uclass_next_device_check(struct udevice **devp)
+{
+ int ret;
+
+ ret = uclass_find_next_device(devp);
+ if (ret)
+ return ret;
+ if (!*devp)
+ return 0;
+
+ return device_probe(*devp);
+}
+
+int uclass_first_device_drvdata(enum uclass_id id, ulong driver_data,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+
+ uclass_id_foreach_dev(id, dev, uc) {
+ if (dev_get_driver_data(dev) == driver_data) {
+ *devp = dev;
+
+ return device_probe(dev);
+ }
+ }
+
+ return -ENODEV;
+}
+
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 (uc->uc_drv->post_bind) {
- ret = uc->uc_drv->post_bind(dev);
- if (ret) {
- list_del(&dev->uclass_node);
- return ret;
+ 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;
list_del(&dev->uclass_node);
return 0;
}
+#endif
int uclass_resolve_seq(struct udevice *dev)
{
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) {
+ ret = uc_drv->child_pre_probe(dev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
int uclass_post_probe_device(struct udevice *dev)
{
- struct uclass_driver *uc_drv = dev->uclass->uc_drv;
+ struct uclass_driver *uc_drv;
+ int ret;
- if (uc_drv->post_probe)
- return uc_drv->post_probe(dev);
+ if (dev->parent) {
+ uc_drv = dev->parent->uclass->uc_drv;
+ if (uc_drv->child_post_probe) {
+ ret = uc_drv->child_post_probe(dev);
+ if (ret)
+ return ret;
+ }
+ }
+
+ uc_drv = dev->uclass->uc_drv;
+ if (uc_drv->post_probe) {
+ ret = uc_drv->post_probe(dev);
+ if (ret)
+ return ret;
+ }
return 0;
}
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
int uclass_pre_remove_device(struct udevice *dev)
{
- struct uclass_driver *uc_drv;
struct uclass *uc;
int ret;
uc = dev->uclass;
- uc_drv = uc->uc_drv;
if (uc->uc_drv->pre_remove) {
ret = uc->uc_drv->pre_remove(dev);
if (ret)
return ret;
}
- if (uc_drv->per_device_auto_alloc_size) {
- free(dev->uclass_priv);
- dev->uclass_priv = NULL;
- }
- dev->seq = -1;
return 0;
}
+#endif
+
+UCLASS_DRIVER(nop) = {
+ .id = UCLASS_NOP,
+ .name = "nop",
+};
projects / oweals / u-boot.git / blobdiff