*/
#include <common.h>
+#include <fdtdec.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <linux/err.h>
#include <linux/list.h>
-/**
- * device_chld_unbind() - Unbind all device's children from the device
- *
- * On error, the function continues to unbind all children, and reports the
- * first error.
- *
- * @dev: The device that is to be stripped of its children
- * @return 0 on success, -ve on error
- */
-static int device_chld_unbind(struct udevice *dev)
-{
- struct udevice *pos, *n;
- int ret, saved_ret = 0;
-
- assert(dev);
-
- list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
- ret = device_unbind(pos);
- if (ret && !saved_ret)
- saved_ret = ret;
- }
-
- return saved_ret;
-}
-
-/**
- * device_chld_remove() - Stop all device's children
- * @dev: The device whose children are to be removed
- * @return 0 on success, -ve on error
- */
-static int device_chld_remove(struct udevice *dev)
-{
- struct udevice *pos, *n;
- int ret;
-
- assert(dev);
-
- list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
- ret = device_remove(pos);
- if (ret)
- return ret;
- }
-
- return 0;
-}
+DECLARE_GLOBAL_DATA_PTR;
-int device_bind(struct udevice *parent, struct driver *drv, const char *name,
- void *platdata, int of_offset, struct udevice **devp)
+int device_bind(struct udevice *parent, const struct driver *drv,
+ const char *name, void *platdata, int of_offset,
+ struct udevice **devp)
{
struct udevice *dev;
struct uclass *uc;
- int ret = 0;
+ int size, ret = 0;
- *devp = NULL;
+ if (devp)
+ *devp = NULL;
if (!name)
return -EINVAL;
INIT_LIST_HEAD(&dev->sibling_node);
INIT_LIST_HEAD(&dev->child_head);
INIT_LIST_HEAD(&dev->uclass_node);
+#ifdef CONFIG_DEVRES
+ INIT_LIST_HEAD(&dev->devres_head);
+#endif
dev->platdata = platdata;
dev->name = name;
dev->of_offset = of_offset;
dev->parent = parent;
dev->driver = drv;
dev->uclass = uc;
- if (!dev->platdata && drv->platdata_auto_alloc_size)
+
+ dev->seq = -1;
+ dev->req_seq = -1;
+ if (CONFIG_IS_ENABLED(OF_CONTROL) && IS_ENABLED(CONFIG_DM_SEQ_ALIAS)) {
+ /*
+ * Some devices, such as a SPI bus, I2C bus and serial ports
+ * are numbered using aliases.
+ *
+ * This is just a 'requested' sequence, and will be
+ * resolved (and ->seq updated) when the device is probed.
+ */
+ if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
+ if (uc->uc_drv->name && of_offset != -1) {
+ fdtdec_get_alias_seq(gd->fdt_blob,
+ uc->uc_drv->name, of_offset,
+ &dev->req_seq);
+ }
+ }
+ }
+
+ if (!dev->platdata && drv->platdata_auto_alloc_size) {
dev->flags |= DM_FLAG_ALLOC_PDATA;
+ dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
+ if (!dev->platdata) {
+ ret = -ENOMEM;
+ goto fail_alloc1;
+ }
+ }
+
+ size = uc->uc_drv->per_device_platdata_auto_alloc_size;
+ if (size) {
+ dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA;
+ dev->uclass_platdata = calloc(1, size);
+ if (!dev->uclass_platdata) {
+ ret = -ENOMEM;
+ goto fail_alloc2;
+ }
+ }
+
+ if (parent) {
+ size = parent->driver->per_child_platdata_auto_alloc_size;
+ if (!size) {
+ size = parent->uclass->uc_drv->
+ per_child_platdata_auto_alloc_size;
+ }
+ if (size) {
+ dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA;
+ dev->parent_platdata = calloc(1, size);
+ if (!dev->parent_platdata) {
+ ret = -ENOMEM;
+ goto fail_alloc3;
+ }
+ }
+ }
/* put dev into parent's successor list */
if (parent)
ret = uclass_bind_device(dev);
if (ret)
- goto fail_bind;
+ goto fail_uclass_bind;
/* if we fail to bind we remove device from successors and free it */
if (drv->bind) {
ret = drv->bind(dev);
- if (ret) {
- if (uclass_unbind_device(dev)) {
- dm_warn("Failed to unbind dev '%s' on error path\n",
- dev->name);
- }
+ if (ret)
goto fail_bind;
- }
}
+ if (parent && parent->driver->child_post_bind) {
+ ret = parent->driver->child_post_bind(dev);
+ if (ret)
+ goto fail_child_post_bind;
+ }
+
if (parent)
dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
- *devp = dev;
+ if (devp)
+ *devp = dev;
+
+ dev->flags |= DM_FLAG_BOUND;
return 0;
+fail_child_post_bind:
+ if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
+ if (drv->unbind && drv->unbind(dev)) {
+ dm_warn("unbind() method failed on dev '%s' on error path\n",
+ dev->name);
+ }
+ }
+
fail_bind:
- list_del(&dev->sibling_node);
+ if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
+ if (uclass_unbind_device(dev)) {
+ dm_warn("Failed to unbind dev '%s' on error path\n",
+ dev->name);
+ }
+ }
+fail_uclass_bind:
+ if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
+ list_del(&dev->sibling_node);
+ if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
+ free(dev->parent_platdata);
+ dev->parent_platdata = NULL;
+ }
+ }
+fail_alloc3:
+ if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
+ free(dev->uclass_platdata);
+ dev->uclass_platdata = NULL;
+ }
+fail_alloc2:
+ if (dev->flags & DM_FLAG_ALLOC_PDATA) {
+ free(dev->platdata);
+ dev->platdata = NULL;
+ }
+fail_alloc1:
+ devres_release_all(dev);
+
free(dev);
+
return ret;
}
-int device_bind_by_name(struct udevice *parent, const struct driver_info *info,
- struct udevice **devp)
+int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
+ const struct driver_info *info, struct udevice **devp)
{
struct driver *drv;
drv = lists_driver_lookup_name(info->name);
if (!drv)
return -ENOENT;
+ if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
+ return -EPERM;
return device_bind(parent, drv, info->name, (void *)info->platdata,
-1, devp);
}
-int device_unbind(struct udevice *dev)
+static void *alloc_priv(int size, uint flags)
{
- struct driver *drv;
- int ret;
-
- if (!dev)
- return -EINVAL;
-
- if (dev->flags & DM_FLAG_ACTIVATED)
- return -EINVAL;
-
- drv = dev->driver;
- assert(drv);
-
- if (drv->unbind) {
- ret = drv->unbind(dev);
- if (ret)
- return ret;
+ void *priv;
+
+ if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
+ priv = memalign(ARCH_DMA_MINALIGN, size);
+ if (priv)
+ memset(priv, '\0', size);
+ } else {
+ priv = calloc(1, size);
}
- ret = device_chld_unbind(dev);
- if (ret)
- return ret;
-
- ret = uclass_unbind_device(dev);
- if (ret)
- return ret;
-
- if (dev->parent)
- list_del(&dev->sibling_node);
- free(dev);
-
- return 0;
+ return priv;
}
-/**
- * device_free() - Free memory buffers allocated by a device
- * @dev: Device that is to be started
- */
-static void device_free(struct udevice *dev)
+int device_probe_child(struct udevice *dev, void *parent_priv)
{
- int size;
-
- if (dev->driver->priv_auto_alloc_size) {
- free(dev->priv);
- dev->priv = NULL;
- }
- if (dev->flags & DM_FLAG_ALLOC_PDATA) {
- free(dev->platdata);
- dev->platdata = NULL;
- }
- size = dev->uclass->uc_drv->per_device_auto_alloc_size;
- if (size) {
- free(dev->uclass_priv);
- dev->uclass_priv = NULL;
- }
-}
-
-int device_probe(struct udevice *dev)
-{
- struct driver *drv;
+ const struct driver *drv;
int size = 0;
int ret;
+ int seq;
if (!dev)
return -EINVAL;
drv = dev->driver;
assert(drv);
- /* Allocate private data and platdata if requested */
- if (drv->priv_auto_alloc_size) {
- dev->priv = calloc(1, drv->priv_auto_alloc_size);
+ /* Allocate private data if requested and not reentered */
+ if (drv->priv_auto_alloc_size && !dev->priv) {
+ dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
if (!dev->priv) {
ret = -ENOMEM;
goto fail;
}
}
- /* Allocate private data if requested */
- if (dev->flags & DM_FLAG_ALLOC_PDATA) {
- dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
- if (!dev->platdata) {
- ret = -ENOMEM;
- goto fail;
- }
- }
+ /* Allocate private data if requested and not reentered */
size = dev->uclass->uc_drv->per_device_auto_alloc_size;
- if (size) {
+ if (size && !dev->uclass_priv) {
dev->uclass_priv = calloc(1, size);
if (!dev->uclass_priv) {
ret = -ENOMEM;
/* Ensure all parents are probed */
if (dev->parent) {
+ size = dev->parent->driver->per_child_auto_alloc_size;
+ if (!size) {
+ size = dev->parent->uclass->uc_drv->
+ per_child_auto_alloc_size;
+ }
+ if (size && !dev->parent_priv) {
+ dev->parent_priv = alloc_priv(size, drv->flags);
+ if (!dev->parent_priv) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ if (parent_priv)
+ memcpy(dev->parent_priv, parent_priv, size);
+ }
+
ret = device_probe(dev->parent);
if (ret)
goto fail;
+
+ /*
+ * The device might have already been probed during
+ * the call to device_probe() on its parent device
+ * (e.g. PCI bridge devices). Test the flags again
+ * so that we don't mess up the device.
+ */
+ if (dev->flags & DM_FLAG_ACTIVATED)
+ return 0;
+ }
+
+ seq = uclass_resolve_seq(dev);
+ if (seq < 0) {
+ ret = seq;
+ goto fail;
+ }
+ dev->seq = seq;
+
+ dev->flags |= DM_FLAG_ACTIVATED;
+
+ ret = uclass_pre_probe_device(dev);
+ if (ret)
+ goto fail;
+
+ if (dev->parent && dev->parent->driver->child_pre_probe) {
+ ret = dev->parent->driver->child_pre_probe(dev);
+ if (ret)
+ goto fail;
}
if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
if (drv->probe) {
ret = drv->probe(dev);
- if (ret)
+ if (ret) {
+ dev->flags &= ~DM_FLAG_ACTIVATED;
goto fail;
+ }
}
- dev->flags |= DM_FLAG_ACTIVATED;
-
ret = uclass_post_probe_device(dev);
- if (ret) {
- dev->flags &= ~DM_FLAG_ACTIVATED;
+ if (ret)
goto fail_uclass;
- }
return 0;
fail_uclass:
__func__, dev->name);
}
fail:
+ dev->flags &= ~DM_FLAG_ACTIVATED;
+
+ dev->seq = -1;
device_free(dev);
return ret;
}
-int device_remove(struct udevice *dev)
+int device_probe(struct udevice *dev)
{
- struct driver *drv;
- int ret;
+ return device_probe_child(dev, NULL);
+}
- if (!dev)
- return -EINVAL;
+void *dev_get_platdata(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
- if (!(dev->flags & DM_FLAG_ACTIVATED))
- return 0;
+ return dev->platdata;
+}
- drv = dev->driver;
- assert(drv);
+void *dev_get_parent_platdata(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
+
+ return dev->parent_platdata;
+}
+
+void *dev_get_uclass_platdata(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
+
+ return dev->uclass_platdata;
+}
+
+void *dev_get_priv(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
+
+ return dev->priv;
+}
+
+void *dev_get_uclass_priv(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
+
+ return dev->uclass_priv;
+}
+
+void *dev_get_parentdata(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device\n", __func__);
+ return NULL;
+ }
+
+ return dev->parent_priv;
+}
- ret = uclass_pre_remove_device(dev);
+static int device_get_device_tail(struct udevice *dev, int ret,
+ struct udevice **devp)
+{
if (ret)
return ret;
- ret = device_chld_remove(dev);
+ ret = device_probe(dev);
if (ret)
- goto err;
+ return ret;
- if (drv->remove) {
- ret = drv->remove(dev);
- if (ret)
- goto err_remove;
+ *devp = dev;
+
+ return 0;
+}
+
+int device_get_child(struct udevice *parent, int index, struct udevice **devp)
+{
+ struct udevice *dev;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if (!index--)
+ return device_get_device_tail(dev, 0, devp);
}
- device_free(dev);
+ return -ENODEV;
+}
- dev->flags &= ~DM_FLAG_ACTIVATED;
+int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
+ bool find_req_seq, struct udevice **devp)
+{
+ struct udevice *dev;
+
+ *devp = NULL;
+ if (seq_or_req_seq == -1)
+ return -ENODEV;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if ((find_req_seq ? dev->req_seq : dev->seq) ==
+ seq_or_req_seq) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int device_get_child_by_seq(struct udevice *parent, int seq,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = device_find_child_by_seq(parent, 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 = device_find_child_by_seq(parent, seq, true, &dev);
+ }
+ return device_get_device_tail(dev, ret, devp);
+}
+
+int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+
+ *devp = NULL;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if (dev->of_offset == of_offset) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int device_get_child_by_of_offset(struct udevice *parent, int node,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = device_find_child_by_of_offset(parent, node, &dev);
+ return device_get_device_tail(dev, ret, devp);
+}
+
+static struct udevice *_device_find_global_by_of_offset(struct udevice *parent,
+ int of_offset)
+{
+ struct udevice *dev, *found;
+
+ if (parent->of_offset == of_offset)
+ return parent;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ found = _device_find_global_by_of_offset(dev, of_offset);
+ if (found)
+ return found;
+ }
+
+ return NULL;
+}
+
+int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
+{
+ struct udevice *dev;
+
+ dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
+ return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
+}
+
+int device_find_first_child(struct udevice *parent, struct udevice **devp)
+{
+ if (list_empty(&parent->child_head)) {
+ *devp = NULL;
+ } else {
+ *devp = list_first_entry(&parent->child_head, struct udevice,
+ sibling_node);
+ }
return 0;
+}
-err_remove:
- /* We can't put the children back */
- dm_warn("%s: Device '%s' failed to remove, but children are gone\n",
- __func__, dev->name);
-err:
- ret = uclass_post_probe_device(dev);
- if (ret) {
- dm_warn("%s: Device '%s' failed to post_probe on error path\n",
- __func__, dev->name);
+int device_find_next_child(struct udevice **devp)
+{
+ struct udevice *dev = *devp;
+ struct udevice *parent = dev->parent;
+
+ if (list_is_last(&dev->sibling_node, &parent->child_head)) {
+ *devp = NULL;
+ } else {
+ *devp = list_entry(dev->sibling_node.next, struct udevice,
+ sibling_node);
}
- return ret;
+ return 0;
}
-void *dev_get_platdata(struct udevice *dev)
+struct udevice *dev_get_parent(struct udevice *child)
{
- if (!dev) {
- dm_warn("%s: null device", __func__);
+ return child->parent;
+}
+
+ulong dev_get_driver_data(struct udevice *dev)
+{
+ return dev->driver_data;
+}
+
+const void *dev_get_driver_ops(struct udevice *dev)
+{
+ if (!dev || !dev->driver->ops)
return NULL;
- }
- return dev->platdata;
+ return dev->driver->ops;
}
-void *dev_get_priv(struct udevice *dev)
+enum uclass_id device_get_uclass_id(struct udevice *dev)
{
- if (!dev) {
- dm_warn("%s: null device", __func__);
+ return dev->uclass->uc_drv->id;
+}
+
+const char *dev_get_uclass_name(struct udevice *dev)
+{
+ if (!dev)
return NULL;
+
+ return dev->uclass->uc_drv->name;
+}
+
+fdt_addr_t dev_get_addr(struct udevice *dev)
+{
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ fdt_addr_t addr;
+
+ addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
+ if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
+ if (device_get_uclass_id(dev->parent) == UCLASS_SIMPLE_BUS)
+ addr = simple_bus_translate(dev->parent, addr);
}
- return dev->priv;
+ return addr;
+#else
+ return FDT_ADDR_T_NONE;
+#endif
+}
+
+bool device_has_children(struct udevice *dev)
+{
+ return !list_empty(&dev->child_head);
+}
+
+bool device_has_active_children(struct udevice *dev)
+{
+ struct udevice *child;
+
+ for (device_find_first_child(dev, &child);
+ child;
+ device_find_next_child(&child)) {
+ if (device_active(child))
+ return true;
+ }
+
+ return false;
+}
+
+bool device_is_last_sibling(struct udevice *dev)
+{
+ struct udevice *parent = dev->parent;
+
+ if (!parent)
+ return false;
+ return list_is_last(&dev->sibling_node, &parent->child_head);
+}
+
+int device_set_name(struct udevice *dev, const char *name)
+{
+ name = strdup(name);
+ if (!name)
+ return -ENOMEM;
+ dev->name = name;
+
+ return 0;
}
projects / karo-tx-uboot.git / blobdiff