mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-27 12:28:52 +09:00
955 lines
29 KiB
C
955 lines
29 KiB
C
/*
|
|
* Copyright (c) 2013 Google, Inc
|
|
*
|
|
* (C) Copyright 2012
|
|
* Pavel Herrmann <morpheus.ibis@gmail.com>
|
|
* Marek Vasut <marex@denx.de>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _DM_DEVICE_H
|
|
#define _DM_DEVICE_H
|
|
|
|
#include <dm/ofnode.h>
|
|
#include <dm/uclass-id.h>
|
|
#include <fdtdec.h>
|
|
#include <linker_lists.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/printk.h>
|
|
|
|
struct driver_info;
|
|
|
|
/* Driver is active (probed). Cleared when it is removed */
|
|
#define DM_FLAG_ACTIVATED (1 << 0)
|
|
|
|
/* DM is responsible for allocating and freeing platdata */
|
|
#define DM_FLAG_ALLOC_PDATA (1 << 1)
|
|
|
|
/* DM should init this device prior to relocation */
|
|
#define DM_FLAG_PRE_RELOC (1 << 2)
|
|
|
|
/* DM is responsible for allocating and freeing parent_platdata */
|
|
#define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3)
|
|
|
|
/* DM is responsible for allocating and freeing uclass_platdata */
|
|
#define DM_FLAG_ALLOC_UCLASS_PDATA (1 << 4)
|
|
|
|
/* Allocate driver private data on a DMA boundary */
|
|
#define DM_FLAG_ALLOC_PRIV_DMA (1 << 5)
|
|
|
|
/* Device is bound */
|
|
#define DM_FLAG_BOUND (1 << 6)
|
|
|
|
/* Device name is allocated and should be freed on unbind() */
|
|
#define DM_FLAG_NAME_ALLOCED (1 << 7)
|
|
|
|
#define DM_FLAG_OF_PLATDATA (1 << 8)
|
|
|
|
/*
|
|
* Call driver remove function to stop currently active DMA transfers or
|
|
* give DMA buffers back to the HW / controller. This may be needed for
|
|
* some drivers to do some final stage cleanup before the OS is called
|
|
* (U-Boot exit)
|
|
*/
|
|
#define DM_FLAG_ACTIVE_DMA (1 << 9)
|
|
|
|
/*
|
|
* Call driver remove function to do some final configuration, before
|
|
* U-Boot exits and the OS is started
|
|
*/
|
|
#define DM_FLAG_OS_PREPARE (1 << 10)
|
|
|
|
/*
|
|
* One or multiple of these flags are passed to device_remove() so that
|
|
* a selective device removal as specified by the remove-stage and the
|
|
* driver flags can be done.
|
|
*/
|
|
enum {
|
|
/* Normal remove, remove all devices */
|
|
DM_REMOVE_NORMAL = 1 << 0,
|
|
|
|
/* Remove devices with active DMA */
|
|
DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
|
|
|
|
/* Remove devices which need some final OS preparation steps */
|
|
DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
|
|
|
|
/* Add more use cases here */
|
|
|
|
/* Remove devices with any active flag */
|
|
DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
|
|
};
|
|
|
|
/**
|
|
* struct udevice - An instance of a driver
|
|
*
|
|
* This holds information about a device, which is a driver bound to a
|
|
* particular port or peripheral (essentially a driver instance).
|
|
*
|
|
* A device will come into existence through a 'bind' call, either due to
|
|
* a U_BOOT_DEVICE() macro (in which case platdata is non-NULL) or a node
|
|
* in the device tree (in which case of_offset is >= 0). In the latter case
|
|
* we translate the device tree information into platdata in a function
|
|
* implemented by the driver ofdata_to_platdata method (called just before the
|
|
* probe method if the device has a device tree node.
|
|
*
|
|
* All three of platdata, priv and uclass_priv can be allocated by the
|
|
* driver, or you can use the auto_alloc_size members of struct driver and
|
|
* struct uclass_driver to have driver model do this automatically.
|
|
*
|
|
* @driver: The driver used by this device
|
|
* @name: Name of device, typically the FDT node name
|
|
* @platdata: Configuration data for this device
|
|
* @parent_platdata: The parent bus's configuration data for this device
|
|
* @uclass_platdata: The uclass's configuration data for this device
|
|
* @node: Reference to device tree node for this device
|
|
* @driver_data: Driver data word for the entry that matched this device with
|
|
* its driver
|
|
* @parent: Parent of this device, or NULL for the top level device
|
|
* @priv: Private data for this device
|
|
* @uclass: Pointer to uclass for this device
|
|
* @uclass_priv: The uclass's private data for this device
|
|
* @parent_priv: The parent's private data for this device
|
|
* @uclass_node: Used by uclass to link its devices
|
|
* @child_head: List of children of this device
|
|
* @sibling_node: Next device in list of all devices
|
|
* @flags: Flags for this device DM_FLAG_...
|
|
* @req_seq: Requested sequence number for this device (-1 = any)
|
|
* @seq: Allocated sequence number for this device (-1 = none). This is set up
|
|
* when the device is probed and will be unique within the device's uclass.
|
|
* @devres_head: List of memory allocations associated with this device.
|
|
* When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
|
|
* add to this list. Memory so-allocated will be freed
|
|
* automatically when the device is removed / unbound
|
|
*/
|
|
struct udevice {
|
|
const struct driver *driver;
|
|
const char *name;
|
|
void *platdata;
|
|
void *parent_platdata;
|
|
void *uclass_platdata;
|
|
ofnode node;
|
|
ulong driver_data;
|
|
struct udevice *parent;
|
|
void *priv;
|
|
struct uclass *uclass;
|
|
void *uclass_priv;
|
|
void *parent_priv;
|
|
struct list_head uclass_node;
|
|
struct list_head child_head;
|
|
struct list_head sibling_node;
|
|
uint32_t flags;
|
|
int req_seq;
|
|
int seq;
|
|
#ifdef CONFIG_DEVRES
|
|
struct list_head devres_head;
|
|
#endif
|
|
};
|
|
|
|
/* Maximum sequence number supported */
|
|
#define DM_MAX_SEQ 999
|
|
|
|
/* Returns the operations for a device */
|
|
#define device_get_ops(dev) (dev->driver->ops)
|
|
|
|
/* Returns non-zero if the device is active (probed and not removed) */
|
|
#define device_active(dev) ((dev)->flags & DM_FLAG_ACTIVATED)
|
|
|
|
static inline int dev_of_offset(const struct udevice *dev)
|
|
{
|
|
return ofnode_to_offset(dev->node);
|
|
}
|
|
|
|
static inline void dev_set_of_offset(struct udevice *dev, int of_offset)
|
|
{
|
|
dev->node = offset_to_ofnode(of_offset);
|
|
}
|
|
|
|
static inline bool dev_has_of_node(struct udevice *dev)
|
|
{
|
|
return ofnode_valid(dev->node);
|
|
}
|
|
|
|
/**
|
|
* struct udevice_id - Lists the compatible strings supported by a driver
|
|
* @compatible: Compatible string
|
|
* @data: Data for this compatible string
|
|
*/
|
|
struct udevice_id {
|
|
const char *compatible;
|
|
ulong data;
|
|
};
|
|
|
|
#if CONFIG_IS_ENABLED(OF_CONTROL)
|
|
#define of_match_ptr(_ptr) (_ptr)
|
|
#else
|
|
#define of_match_ptr(_ptr) NULL
|
|
#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
|
|
|
|
/**
|
|
* struct driver - A driver for a feature or peripheral
|
|
*
|
|
* This holds methods for setting up a new device, and also removing it.
|
|
* The device needs information to set itself up - this is provided either
|
|
* by platdata or a device tree node (which we find by looking up
|
|
* matching compatible strings with of_match).
|
|
*
|
|
* Drivers all belong to a uclass, representing a class of devices of the
|
|
* same type. Common elements of the drivers can be implemented in the uclass,
|
|
* or the uclass can provide a consistent interface to the drivers within
|
|
* it.
|
|
*
|
|
* @name: Device name
|
|
* @id: Identifies the uclass we belong to
|
|
* @of_match: List of compatible strings to match, and any identifying data
|
|
* for each.
|
|
* @bind: Called to bind a device to its driver
|
|
* @probe: Called to probe a device, i.e. activate it
|
|
* @remove: Called to remove a device, i.e. de-activate it
|
|
* @unbind: Called to unbind a device from its driver
|
|
* @ofdata_to_platdata: Called before probe to decode device tree data
|
|
* @child_post_bind: Called after a new child has been bound
|
|
* @child_pre_probe: Called before a child device is probed. The device has
|
|
* memory allocated but it has not yet been probed.
|
|
* @child_post_remove: Called after a child device is removed. The device
|
|
* has memory allocated but its device_remove() method has been called.
|
|
* @priv_auto_alloc_size: If non-zero this is the size of the private data
|
|
* to be allocated in the device's ->priv pointer. If zero, then the driver
|
|
* is responsible for allocating any data required.
|
|
* @platdata_auto_alloc_size: If non-zero this is the size of the
|
|
* platform data to be allocated in the device's ->platdata pointer.
|
|
* This is typically only useful for device-tree-aware drivers (those with
|
|
* an of_match), since drivers which use platdata will have the data
|
|
* provided in the U_BOOT_DEVICE() instantiation.
|
|
* @per_child_auto_alloc_size: Each device can hold private data owned by
|
|
* its parent. If required this will be automatically allocated if this
|
|
* value is non-zero.
|
|
* @per_child_platdata_auto_alloc_size: A bus likes to store information about
|
|
* its children. If non-zero this is the size of this data, to be allocated
|
|
* in the child's parent_platdata pointer.
|
|
* @ops: Driver-specific operations. This is typically a list of function
|
|
* pointers defined by the driver, to implement driver functions required by
|
|
* the uclass.
|
|
* @flags: driver flags - see DM_FLAGS_...
|
|
*/
|
|
struct driver {
|
|
char *name;
|
|
enum uclass_id id;
|
|
const struct udevice_id *of_match;
|
|
int (*bind)(struct udevice *dev);
|
|
int (*probe)(struct udevice *dev);
|
|
int (*remove)(struct udevice *dev);
|
|
int (*unbind)(struct udevice *dev);
|
|
int (*ofdata_to_platdata)(struct udevice *dev);
|
|
int (*child_post_bind)(struct udevice *dev);
|
|
int (*child_pre_probe)(struct udevice *dev);
|
|
int (*child_post_remove)(struct udevice *dev);
|
|
int priv_auto_alloc_size;
|
|
int platdata_auto_alloc_size;
|
|
int per_child_auto_alloc_size;
|
|
int per_child_platdata_auto_alloc_size;
|
|
const void *ops; /* driver-specific operations */
|
|
uint32_t flags;
|
|
};
|
|
|
|
/* Declare a new U-Boot driver */
|
|
#define U_BOOT_DRIVER(__name) \
|
|
ll_entry_declare(struct driver, __name, driver)
|
|
|
|
/* Get a pointer to a given driver */
|
|
#define DM_GET_DRIVER(__name) \
|
|
ll_entry_get(struct driver, __name, driver)
|
|
|
|
/**
|
|
* dev_get_platdata() - Get the platform data for a device
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return platform data, or NULL if none
|
|
*/
|
|
void *dev_get_platdata(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_parent_platdata() - Get the parent platform data for a device
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return parent's platform data, or NULL if none
|
|
*/
|
|
void *dev_get_parent_platdata(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_uclass_platdata() - Get the uclass platform data for a device
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return uclass's platform data, or NULL if none
|
|
*/
|
|
void *dev_get_uclass_platdata(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_priv() - Get the private data for a device
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return private data, or NULL if none
|
|
*/
|
|
void *dev_get_priv(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_parent_priv() - Get the parent private data for a device
|
|
*
|
|
* The parent private data is data stored in the device but owned by the
|
|
* parent. For example, a USB device may have parent data which contains
|
|
* information about how to talk to the device over USB.
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return parent data, or NULL if none
|
|
*/
|
|
void *dev_get_parent_priv(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_uclass_priv() - Get the private uclass data for a device
|
|
*
|
|
* This checks that dev is not NULL, but no other checks for now
|
|
*
|
|
* @dev Device to check
|
|
* @return private uclass data for this device, or NULL if none
|
|
*/
|
|
void *dev_get_uclass_priv(struct udevice *dev);
|
|
|
|
/**
|
|
* struct dev_get_parent() - Get the parent of a device
|
|
*
|
|
* @child: Child to check
|
|
* @return parent of child, or NULL if this is the root device
|
|
*/
|
|
struct udevice *dev_get_parent(struct udevice *child);
|
|
|
|
/**
|
|
* dev_get_driver_data() - get the driver data used to bind a device
|
|
*
|
|
* When a device is bound using a device tree node, it matches a
|
|
* particular compatible string in struct udevice_id. This function
|
|
* returns the associated data value for that compatible string. This is
|
|
* the 'data' field in struct udevice_id.
|
|
*
|
|
* As an example, consider this structure:
|
|
* static const struct udevice_id tegra_i2c_ids[] = {
|
|
* { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
|
|
* { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
|
|
* { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
|
|
* { }
|
|
* };
|
|
*
|
|
* When driver model finds a driver for this it will store the 'data' value
|
|
* corresponding to the compatible string it matches. This function returns
|
|
* that value. This allows the driver to handle several variants of a device.
|
|
*
|
|
* For USB devices, this is the driver_info field in struct usb_device_id.
|
|
*
|
|
* @dev: Device to check
|
|
* @return driver data (0 if none is provided)
|
|
*/
|
|
ulong dev_get_driver_data(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_driver_ops() - get the device's driver's operations
|
|
*
|
|
* This checks that dev is not NULL, and returns the pointer to device's
|
|
* driver's operations.
|
|
*
|
|
* @dev: Device to check
|
|
* @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
|
|
*/
|
|
const void *dev_get_driver_ops(struct udevice *dev);
|
|
|
|
/**
|
|
* device_get_uclass_id() - return the uclass ID of a device
|
|
*
|
|
* @dev: Device to check
|
|
* @return uclass ID for the device
|
|
*/
|
|
enum uclass_id device_get_uclass_id(struct udevice *dev);
|
|
|
|
/**
|
|
* dev_get_uclass_name() - return the uclass name of a device
|
|
*
|
|
* This checks that dev is not NULL.
|
|
*
|
|
* @dev: Device to check
|
|
* @return pointer to the uclass name for the device
|
|
*/
|
|
const char *dev_get_uclass_name(struct udevice *dev);
|
|
|
|
/**
|
|
* device_get_child() - Get the child of a device by index
|
|
*
|
|
* Returns the numbered child, 0 being the first. This does not use
|
|
* sequence numbers, only the natural order.
|
|
*
|
|
* @dev: Parent device to check
|
|
* @index: Child index
|
|
* @devp: Returns pointer to device
|
|
* @return 0 if OK, -ENODEV if no such device, other error if the device fails
|
|
* to probe
|
|
*/
|
|
int device_get_child(struct udevice *parent, int index, struct udevice **devp);
|
|
|
|
/**
|
|
* device_find_child_by_seq() - Find a child device based on a sequence
|
|
*
|
|
* This searches for a device with the given seq or req_seq.
|
|
*
|
|
* For seq, if an active device has this sequence it will be returned.
|
|
* If there is no such device then this will return -ENODEV.
|
|
*
|
|
* For req_seq, if a device (whether activated or not) has this req_seq
|
|
* value, that device will be returned. This is a strong indication that
|
|
* the device will receive that sequence when activated.
|
|
*
|
|
* @parent: Parent device
|
|
* @seq_or_req_seq: Sequence number to find (0=first)
|
|
* @find_req_seq: true to find req_seq, false to find seq
|
|
* @devp: Returns pointer to device (there is only one per for each seq).
|
|
* Set to NULL if none is found
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
|
|
bool find_req_seq, struct udevice **devp);
|
|
|
|
/**
|
|
* device_get_child_by_seq() - Get a child device based on a sequence
|
|
*
|
|
* If an active device has this sequence it will be returned. If there is no
|
|
* such device then this will check for a device that is requesting this
|
|
* sequence.
|
|
*
|
|
* The device is probed to activate it ready for use.
|
|
*
|
|
* @parent: Parent device
|
|
* @seq: Sequence number to find (0=first)
|
|
* @devp: Returns pointer to device (there is only one per for each seq)
|
|
* Set to NULL if none is found
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_get_child_by_seq(struct udevice *parent, int seq,
|
|
struct udevice **devp);
|
|
|
|
/**
|
|
* device_find_child_by_of_offset() - Find a child device based on FDT offset
|
|
*
|
|
* Locates a child device by its device tree offset.
|
|
*
|
|
* @parent: Parent device
|
|
* @of_offset: Device tree offset to find
|
|
* @devp: Returns pointer to device if found, otherwise this is set to NULL
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
|
|
struct udevice **devp);
|
|
|
|
/**
|
|
* device_get_child_by_of_offset() - Get a child device based on FDT offset
|
|
*
|
|
* Locates a child device by its device tree offset.
|
|
*
|
|
* The device is probed to activate it ready for use.
|
|
*
|
|
* @parent: Parent device
|
|
* @of_offset: Device tree offset to find
|
|
* @devp: Returns pointer to device if found, otherwise this is set to NULL
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
|
|
struct udevice **devp);
|
|
|
|
/**
|
|
* device_get_global_by_of_offset() - Get a device based on FDT offset
|
|
*
|
|
* Locates a device by its device tree offset, searching globally throughout
|
|
* the all driver model devices.
|
|
*
|
|
* The device is probed to activate it ready for use.
|
|
*
|
|
* @of_offset: Device tree offset to find
|
|
* @devp: Returns pointer to device if found, otherwise this is set to NULL
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int device_get_global_by_of_offset(int of_offset, struct udevice **devp);
|
|
|
|
/**
|
|
* device_find_first_child() - Find the first child of a device
|
|
*
|
|
* @parent: Parent device to search
|
|
* @devp: Returns first child device, or NULL if none
|
|
* @return 0
|
|
*/
|
|
int device_find_first_child(struct udevice *parent, struct udevice **devp);
|
|
|
|
/**
|
|
* device_find_next_child() - Find the next child of a device
|
|
*
|
|
* @devp: Pointer to previous child device on entry. Returns pointer to next
|
|
* child device, or NULL if none
|
|
* @return 0
|
|
*/
|
|
int device_find_next_child(struct udevice **devp);
|
|
|
|
/**
|
|
* device_has_children() - check if a device has any children
|
|
*
|
|
* @dev: Device to check
|
|
* @return true if the device has one or more children
|
|
*/
|
|
bool device_has_children(struct udevice *dev);
|
|
|
|
/**
|
|
* device_has_active_children() - check if a device has any active children
|
|
*
|
|
* @dev: Device to check
|
|
* @return true if the device has one or more children and at least one of
|
|
* them is active (probed).
|
|
*/
|
|
bool device_has_active_children(struct udevice *dev);
|
|
|
|
/**
|
|
* device_is_last_sibling() - check if a device is the last sibling
|
|
*
|
|
* This function can be useful for display purposes, when special action needs
|
|
* to be taken when displaying the last sibling. This can happen when a tree
|
|
* view of devices is being displayed.
|
|
*
|
|
* @dev: Device to check
|
|
* @return true if there are no more siblings after this one - i.e. is it
|
|
* last in the list.
|
|
*/
|
|
bool device_is_last_sibling(struct udevice *dev);
|
|
|
|
/**
|
|
* device_set_name() - set the name of a device
|
|
*
|
|
* This must be called in the device's bind() method and no later. Normally
|
|
* this is unnecessary but for probed devices which don't get a useful name
|
|
* this function can be helpful.
|
|
*
|
|
* The name is allocated and will be freed automatically when the device is
|
|
* unbound.
|
|
*
|
|
* @dev: Device to update
|
|
* @name: New name (this string is allocated new memory and attached to
|
|
* the device)
|
|
* @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
|
|
* string
|
|
*/
|
|
int device_set_name(struct udevice *dev, const char *name);
|
|
|
|
/**
|
|
* device_set_name_alloced() - note that a device name is allocated
|
|
*
|
|
* This sets the DM_FLAG_NAME_ALLOCED flag for the device, so that when it is
|
|
* unbound the name will be freed. This avoids memory leaks.
|
|
*
|
|
* @dev: Device to update
|
|
*/
|
|
void device_set_name_alloced(struct udevice *dev);
|
|
|
|
/**
|
|
* device_is_compatible() - check if the device is compatible with the compat
|
|
*
|
|
* This allows to check whether the device is comaptible with the compat.
|
|
*
|
|
* @dev: udevice pointer for which compatible needs to be verified.
|
|
* @compat: Compatible string which needs to verified in the given
|
|
* device
|
|
* @return true if OK, false if the compatible is not found
|
|
*/
|
|
bool device_is_compatible(struct udevice *dev, const char *compat);
|
|
|
|
/**
|
|
* of_machine_is_compatible() - check if the machine is compatible with
|
|
* the compat
|
|
*
|
|
* This allows to check whether the machine is comaptible with the compat.
|
|
*
|
|
* @compat: Compatible string which needs to verified
|
|
* @return true if OK, false if the compatible is not found
|
|
*/
|
|
bool of_machine_is_compatible(const char *compat);
|
|
|
|
/**
|
|
* device_is_on_pci_bus - Test if a device is on a PCI bus
|
|
*
|
|
* @dev: device to test
|
|
* @return: true if it is on a PCI bus, false otherwise
|
|
*/
|
|
static inline bool device_is_on_pci_bus(struct udevice *dev)
|
|
{
|
|
return device_get_uclass_id(dev->parent) == UCLASS_PCI;
|
|
}
|
|
|
|
/**
|
|
* device_foreach_child_safe() - iterate through child devices safely
|
|
*
|
|
* This allows the @pos child to be removed in the loop if required.
|
|
*
|
|
* @pos: struct udevice * for the current device
|
|
* @next: struct udevice * for the next device
|
|
* @parent: parent device to scan
|
|
*/
|
|
#define device_foreach_child_safe(pos, next, parent) \
|
|
list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
|
|
|
|
/**
|
|
* dm_scan_fdt_dev() - Bind child device in a the device tree
|
|
*
|
|
* This handles device which have sub-nodes in the device tree. It scans all
|
|
* sub-nodes and binds drivers for each node where a driver can be found.
|
|
*
|
|
* If this is called prior to relocation, only pre-relocation devices will be
|
|
* bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
|
|
* the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
|
|
* be bound.
|
|
*
|
|
* @dev: Device to scan
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int dm_scan_fdt_dev(struct udevice *dev);
|
|
|
|
/* device resource management */
|
|
typedef void (*dr_release_t)(struct udevice *dev, void *res);
|
|
typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
|
|
|
|
#ifdef CONFIG_DEVRES
|
|
|
|
#ifdef CONFIG_DEBUG_DEVRES
|
|
void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
|
|
const char *name);
|
|
#define _devres_alloc(release, size, gfp) \
|
|
__devres_alloc(release, size, gfp, #release)
|
|
#else
|
|
void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
|
|
#endif
|
|
|
|
/**
|
|
* devres_alloc() - Allocate device resource data
|
|
* @release: Release function devres will be associated with
|
|
* @size: Allocation size
|
|
* @gfp: Allocation flags
|
|
*
|
|
* Allocate devres of @size bytes. The allocated area is associated
|
|
* with @release. The returned pointer can be passed to
|
|
* other devres_*() functions.
|
|
*
|
|
* RETURNS:
|
|
* Pointer to allocated devres on success, NULL on failure.
|
|
*/
|
|
#define devres_alloc(release, size, gfp) \
|
|
_devres_alloc(release, size, gfp | __GFP_ZERO)
|
|
|
|
/**
|
|
* devres_free() - Free device resource data
|
|
* @res: Pointer to devres data to free
|
|
*
|
|
* Free devres created with devres_alloc().
|
|
*/
|
|
void devres_free(void *res);
|
|
|
|
/**
|
|
* devres_add() - Register device resource
|
|
* @dev: Device to add resource to
|
|
* @res: Resource to register
|
|
*
|
|
* Register devres @res to @dev. @res should have been allocated
|
|
* using devres_alloc(). On driver detach, the associated release
|
|
* function will be invoked and devres will be freed automatically.
|
|
*/
|
|
void devres_add(struct udevice *dev, void *res);
|
|
|
|
/**
|
|
* devres_find() - Find device resource
|
|
* @dev: Device to lookup resource from
|
|
* @release: Look for resources associated with this release function
|
|
* @match: Match function (optional)
|
|
* @match_data: Data for the match function
|
|
*
|
|
* Find the latest devres of @dev which is associated with @release
|
|
* and for which @match returns 1. If @match is NULL, it's considered
|
|
* to match all.
|
|
*
|
|
* @return pointer to found devres, NULL if not found.
|
|
*/
|
|
void *devres_find(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data);
|
|
|
|
/**
|
|
* devres_get() - Find devres, if non-existent, add one atomically
|
|
* @dev: Device to lookup or add devres for
|
|
* @new_res: Pointer to new initialized devres to add if not found
|
|
* @match: Match function (optional)
|
|
* @match_data: Data for the match function
|
|
*
|
|
* Find the latest devres of @dev which has the same release function
|
|
* as @new_res and for which @match return 1. If found, @new_res is
|
|
* freed; otherwise, @new_res is added atomically.
|
|
*
|
|
* @return ointer to found or added devres.
|
|
*/
|
|
void *devres_get(struct udevice *dev, void *new_res,
|
|
dr_match_t match, void *match_data);
|
|
|
|
/**
|
|
* devres_remove() - Find a device resource and remove it
|
|
* @dev: Device to find resource from
|
|
* @release: Look for resources associated with this release function
|
|
* @match: Match function (optional)
|
|
* @match_data: Data for the match function
|
|
*
|
|
* Find the latest devres of @dev associated with @release and for
|
|
* which @match returns 1. If @match is NULL, it's considered to
|
|
* match all. If found, the resource is removed atomically and
|
|
* returned.
|
|
*
|
|
* @return ointer to removed devres on success, NULL if not found.
|
|
*/
|
|
void *devres_remove(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data);
|
|
|
|
/**
|
|
* devres_destroy() - Find a device resource and destroy it
|
|
* @dev: Device to find resource from
|
|
* @release: Look for resources associated with this release function
|
|
* @match: Match function (optional)
|
|
* @match_data: Data for the match function
|
|
*
|
|
* Find the latest devres of @dev associated with @release and for
|
|
* which @match returns 1. If @match is NULL, it's considered to
|
|
* match all. If found, the resource is removed atomically and freed.
|
|
*
|
|
* Note that the release function for the resource will not be called,
|
|
* only the devres-allocated data will be freed. The caller becomes
|
|
* responsible for freeing any other data.
|
|
*
|
|
* @return 0 if devres is found and freed, -ENOENT if not found.
|
|
*/
|
|
int devres_destroy(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data);
|
|
|
|
/**
|
|
* devres_release() - Find a device resource and destroy it, calling release
|
|
* @dev: Device to find resource from
|
|
* @release: Look for resources associated with this release function
|
|
* @match: Match function (optional)
|
|
* @match_data: Data for the match function
|
|
*
|
|
* Find the latest devres of @dev associated with @release and for
|
|
* which @match returns 1. If @match is NULL, it's considered to
|
|
* match all. If found, the resource is removed atomically, the
|
|
* release function called and the resource freed.
|
|
*
|
|
* @return 0 if devres is found and freed, -ENOENT if not found.
|
|
*/
|
|
int devres_release(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data);
|
|
|
|
/* managed devm_k.alloc/kfree for device drivers */
|
|
/**
|
|
* devm_kmalloc() - Resource-managed kmalloc
|
|
* @dev: Device to allocate memory for
|
|
* @size: Allocation size
|
|
* @gfp: Allocation gfp flags
|
|
*
|
|
* Managed kmalloc. Memory allocated with this function is
|
|
* automatically freed on driver detach. Like all other devres
|
|
* resources, guaranteed alignment is unsigned long long.
|
|
*
|
|
* @return pointer to allocated memory on success, NULL on failure.
|
|
*/
|
|
void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
|
|
static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
|
|
{
|
|
return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
|
|
}
|
|
static inline void *devm_kmalloc_array(struct udevice *dev,
|
|
size_t n, size_t size, gfp_t flags)
|
|
{
|
|
if (size != 0 && n > SIZE_MAX / size)
|
|
return NULL;
|
|
return devm_kmalloc(dev, n * size, flags);
|
|
}
|
|
static inline void *devm_kcalloc(struct udevice *dev,
|
|
size_t n, size_t size, gfp_t flags)
|
|
{
|
|
return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
|
|
}
|
|
|
|
/**
|
|
* devm_kfree() - Resource-managed kfree
|
|
* @dev: Device this memory belongs to
|
|
* @ptr: Memory to free
|
|
*
|
|
* Free memory allocated with devm_kmalloc().
|
|
*/
|
|
void devm_kfree(struct udevice *dev, void *ptr);
|
|
|
|
#else /* ! CONFIG_DEVRES */
|
|
|
|
static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
|
|
{
|
|
return kzalloc(size, gfp);
|
|
}
|
|
|
|
static inline void devres_free(void *res)
|
|
{
|
|
kfree(res);
|
|
}
|
|
|
|
static inline void devres_add(struct udevice *dev, void *res)
|
|
{
|
|
}
|
|
|
|
static inline void *devres_find(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void *devres_get(struct udevice *dev, void *new_res,
|
|
dr_match_t match, void *match_data)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void *devres_remove(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int devres_destroy(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int devres_release(struct udevice *dev, dr_release_t release,
|
|
dr_match_t match, void *match_data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
|
|
{
|
|
return kmalloc(size, gfp);
|
|
}
|
|
|
|
static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
|
|
{
|
|
return kzalloc(size, gfp);
|
|
}
|
|
|
|
static inline void *devm_kmaloc_array(struct udevice *dev,
|
|
size_t n, size_t size, gfp_t flags)
|
|
{
|
|
/* TODO: add kmalloc_array() to linux/compat.h */
|
|
if (size != 0 && n > SIZE_MAX / size)
|
|
return NULL;
|
|
return kmalloc(n * size, flags);
|
|
}
|
|
|
|
static inline void *devm_kcalloc(struct udevice *dev,
|
|
size_t n, size_t size, gfp_t flags)
|
|
{
|
|
/* TODO: add kcalloc() to linux/compat.h */
|
|
return kmalloc(n * size, flags | __GFP_ZERO);
|
|
}
|
|
|
|
static inline void devm_kfree(struct udevice *dev, void *ptr)
|
|
{
|
|
kfree(ptr);
|
|
}
|
|
|
|
#endif /* ! CONFIG_DEVRES */
|
|
|
|
/*
|
|
* REVISIT:
|
|
* remove the following after resolving conflicts with <linux/compat.h>
|
|
*/
|
|
#ifdef dev_dbg
|
|
#undef dev_dbg
|
|
#endif
|
|
#ifdef dev_vdbg
|
|
#undef dev_vdbg
|
|
#endif
|
|
#ifdef dev_info
|
|
#undef dev_info
|
|
#endif
|
|
#ifdef dev_err
|
|
#undef dev_err
|
|
#endif
|
|
#ifdef dev_warn
|
|
#undef dev_warn
|
|
#endif
|
|
|
|
/*
|
|
* REVISIT:
|
|
* print device name like Linux
|
|
*/
|
|
#define dev_printk(dev, fmt, ...) \
|
|
({ \
|
|
printk(fmt, ##__VA_ARGS__); \
|
|
})
|
|
|
|
#define __dev_printk(level, dev, fmt, ...) \
|
|
({ \
|
|
if (level < CONFIG_VAL(LOGLEVEL)) \
|
|
dev_printk(dev, fmt, ##__VA_ARGS__); \
|
|
})
|
|
|
|
#define dev_emerg(dev, fmt, ...) \
|
|
__dev_printk(0, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_alert(dev, fmt, ...) \
|
|
__dev_printk(1, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_crit(dev, fmt, ...) \
|
|
__dev_printk(2, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_err(dev, fmt, ...) \
|
|
__dev_printk(3, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_warn(dev, fmt, ...) \
|
|
__dev_printk(4, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_notice(dev, fmt, ...) \
|
|
__dev_printk(5, dev, fmt, ##__VA_ARGS__)
|
|
#define dev_info(dev, fmt, ...) \
|
|
__dev_printk(6, dev, fmt, ##__VA_ARGS__)
|
|
|
|
#ifdef DEBUG
|
|
#define dev_dbg(dev, fmt, ...) \
|
|
__dev_printk(7, dev, fmt, ##__VA_ARGS__)
|
|
#else
|
|
#define dev_dbg(dev, fmt, ...) \
|
|
({ \
|
|
if (0) \
|
|
__dev_printk(7, dev, fmt, ##__VA_ARGS__); \
|
|
})
|
|
#endif
|
|
|
|
#ifdef VERBOSE_DEBUG
|
|
#define dev_vdbg dev_dbg
|
|
#else
|
|
#define dev_vdbg(dev, fmt, ...) \
|
|
({ \
|
|
if (0) \
|
|
__dev_printk(7, dev, fmt, ##__VA_ARGS__); \
|
|
})
|
|
#endif
|
|
|
|
#endif
|