diff options
Diffstat (limited to 'include/dm')
| -rw-r--r-- | include/dm/device-internal.h | 6 | ||||
| -rw-r--r-- | include/dm/device.h | 120 | ||||
| -rw-r--r-- | include/dm/lists.h | 2 | ||||
| -rw-r--r-- | include/dm/platdata.h | 10 | ||||
| -rw-r--r-- | include/dm/root.h | 61 | ||||
| -rw-r--r-- | include/dm/test.h | 22 | ||||
| -rw-r--r-- | include/dm/uclass-id.h | 3 | ||||
| -rw-r--r-- | include/dm/uclass-internal.h | 23 | ||||
| -rw-r--r-- | include/dm/uclass.h | 49 |
9 files changed, 285 insertions, 11 deletions
diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h index 26e5cf530e..7005d03d08 100644 --- a/include/dm/device-internal.h +++ b/include/dm/device-internal.h @@ -45,12 +45,14 @@ int device_bind(struct udevice *parent, struct driver *drv, * tree. * * @parent: Pointer to device's parent + * @pre_reloc_only: If true, bind the driver only if its DM_INIT_F flag is set. + * If false bind the driver always. * @info: Name and platdata for this device * @devp: Returns a pointer to the bound device * @return 0 if OK, -ve on error */ -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); /** * device_probe() - Probe a device, activating it diff --git a/include/dm/device.h b/include/dm/device.h index ae75a3f54d..c8a4072bcf 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -23,6 +23,9 @@ struct driver_info; /* 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) + /** * struct udevice - An instance of a driver * @@ -48,10 +51,13 @@ struct driver_info; * @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) */ struct udevice { struct driver *driver; @@ -62,12 +68,18 @@ struct udevice { 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; }; +/* Maximum sequence number supported */ +#define DM_MAX_SEQ 999 + /* Returns the operations for a device */ #define device_get_ops(dev) (dev->driver->ops) @@ -106,6 +118,10 @@ struct udevice_id { * @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_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. @@ -114,9 +130,13 @@ struct udevice_id { * 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. - * ops: Driver-specific operations. This is typically a list of function + * @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. + * @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; @@ -127,9 +147,13 @@ struct driver { int (*remove)(struct udevice *dev); int (*unbind)(struct udevice *dev); int (*ofdata_to_platdata)(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; const void *ops; /* driver-specific operations */ + uint32_t flags; }; /* Declare a new U-Boot driver */ @@ -147,6 +171,20 @@ struct driver { void *dev_get_platdata(struct udevice *dev); /** + * dev_get_parentdata() - Get the parent data for a device + * + * The parent 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_parentdata(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 @@ -156,4 +194,84 @@ void *dev_get_platdata(struct udevice *dev); */ void *dev_get_priv(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 + */ +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 seq, + struct udevice **devp); + #endif diff --git a/include/dm/lists.h b/include/dm/lists.h index 49d87e6176..87a3af59c2 100644 --- a/include/dm/lists.h +++ b/include/dm/lists.h @@ -42,7 +42,7 @@ struct uclass_driver *lists_uclass_lookup(enum uclass_id id); * @early_only: If true, bind only drivers with the DM_INIT_F flag. If false * bind all drivers. */ -int lists_bind_drivers(struct udevice *parent); +int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only); /** * lists_bind_fdt() - bind a device tree node diff --git a/include/dm/platdata.h b/include/dm/platdata.h index 0ef3353e74..2bc8b147ed 100644 --- a/include/dm/platdata.h +++ b/include/dm/platdata.h @@ -11,9 +11,15 @@ #ifndef _DM_PLATDATA_H #define _DM_PLATDATA_H +/** + * struct driver_info - Information required to instantiate a device + * + * @name: Device name + * @platdata: Driver-specific platform data + */ struct driver_info { - const char *name; - const void *platdata; + const char *name; + const void *platdata; }; #define U_BOOT_DEVICE(__name) \ diff --git a/include/dm/root.h b/include/dm/root.h index a4826a6e3c..c7f0c1d5ca 100644 --- a/include/dm/root.h +++ b/include/dm/root.h @@ -26,19 +26,66 @@ struct udevice *dm_root(void); * * This scans all available platdata and creates drivers for each * + * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC + * flag. If false bind all drivers. * @return 0 if OK, -ve on error */ -int dm_scan_platdata(void); +int dm_scan_platdata(bool pre_reloc_only); /** * dm_scan_fdt() - Scan the device tree and bind drivers * - * This scans the device tree and creates a driver for each node + * This scans the device tree and creates a driver for each node. Only + * the top-level subnodes are examined. * * @blob: Pointer to device tree blob + * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC + * flag. If false bind all drivers. * @return 0 if OK, -ve on error */ -int dm_scan_fdt(const void *blob); +int dm_scan_fdt(const void *blob, bool pre_reloc_only); + +/** + * dm_scan_fdt_node() - Scan the device tree and bind drivers for a node + * + * This scans the subnodes of a device tree node and and creates a driver + * for each one. + * + * @parent: Parent device for the devices that will be created + * @blob: Pointer to device tree blob + * @offset: Offset of node to scan + * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC + * flag. If false bind all drivers. + * @return 0 if OK, -ve on error + */ +int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset, + bool pre_reloc_only); + +/** + * dm_scan_other() - Scan for other devices + * + * Some devices may not be visible to Driver Model. This weak function can + * be provided by boards which wish to create their own devices + * programmaticaly. They should do this by calling device_bind() on each + * device. + * + * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC + * flag. If false bind all drivers. + */ +int dm_scan_other(bool pre_reloc_only); + +/** + * dm_init_and_scan() - Initialise Driver Model structures and scan for devices + * + * This function initialises the roots of the driver tree and uclass trees, + * then scans and binds available devices from platform data and the FDT. + * This calls dm_init() to set up Driver Model structures. + * + * @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC + * flag. If false bind all drivers. + * @return 0 if OK, -ve on error + */ +int dm_init_and_scan(bool pre_reloc_only); /** * dm_init() - Initialise Driver Model structures @@ -50,4 +97,12 @@ int dm_scan_fdt(const void *blob); */ int dm_init(void); +/** + * dm_uninit - Uninitialise Driver Model structures + * + * All devices will be removed and unbound + * @return 0 if OK, -ve on error + */ +int dm_uninit(void); + #endif diff --git a/include/dm/test.h b/include/dm/test.h index 409f1a3667..235d728bfb 100644 --- a/include/dm/test.h +++ b/include/dm/test.h @@ -82,6 +82,17 @@ struct dm_test_uclass_priv { int total_add; }; +/** + * struct dm_test_parent_data - parent's information on each child + * + * @sum: Test value used to check parent data works correctly + * @flag: Used to track calling of parent operations + */ +struct dm_test_parent_data { + int sum; + int flag; +}; + /* * Operation counts for the test driver, used to check that each method is * called correctly @@ -100,6 +111,7 @@ extern struct dm_test_state global_test_state; * @fail_count: Number of tests that failed * @force_fail_alloc: Force all memory allocs to fail * @skip_post_probe: Skip uclass post-probe processing + * @removed: Used to keep track of a device that was removed */ struct dm_test_state { struct udevice *root; @@ -107,6 +119,7 @@ struct dm_test_state { int fail_count; int force_fail_alloc; int skip_post_probe; + struct udevice *removed; }; /* Test flags for each test */ @@ -156,6 +169,15 @@ int dm_check_operations(struct dm_test_state *dms, struct udevice *dev, uint32_t base, struct dm_test_priv *priv); /** + * dm_check_devices() - check the devices respond to operations correctly + * + * @dms: Overall test state + * @num_devices: Number of test devices to check + * @return 0 if OK, -ve on error + */ +int dm_check_devices(struct dm_test_state *dms, int num_devices); + +/** * dm_test_main() - Run all the tests * * This runs all available driver model tests diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index f0e691c18c..dd95fca428 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -17,9 +17,10 @@ enum uclass_id { UCLASS_DEMO, UCLASS_TEST, UCLASS_TEST_FDT, + UCLASS_TEST_BUS, /* U-Boot uclasses start here */ - UCLASS_GPIO, + UCLASS_GPIO, /* Bank of general-purpose I/O pins */ UCLASS_COUNT, UCLASS_INVALID = -1, diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h index 1434db3eb4..f718f37aff 100644 --- a/include/dm/uclass-internal.h +++ b/include/dm/uclass-internal.h @@ -82,4 +82,27 @@ struct uclass *uclass_find(enum uclass_id key); */ int uclass_destroy(struct uclass *uc); +/** + * uclass_find_device_by_seq() - Find uclass device based on ID and 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. + * + * The device is NOT probed, it is merely returned. + * + * @id: ID to look up + * @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) + * @return 0 if OK, -ve on error + */ +int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq, + bool find_req_seq, struct udevice **devp); + #endif diff --git a/include/dm/uclass.h b/include/dm/uclass.h index afd9923fb3..8d09ecff7b 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -98,7 +98,7 @@ int uclass_get(enum uclass_id key, struct uclass **ucp); * * The device is probed to activate it ready for use. * - * id: ID to look up + * @id: ID to look up * @index: Device number within that uclass (0=first) * @devp: Returns pointer to device (there is only one per for each ID) * @return 0 if OK, -ve on error @@ -106,6 +106,38 @@ int uclass_get(enum uclass_id key, struct uclass **ucp); int uclass_get_device(enum uclass_id id, int index, struct udevice **devp); /** + * uclass_get_device_by_seq() - Get a uclass device based on an ID and 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. + * + * @id: ID to look up + * @seq: Sequence number to find (0=first) + * @devp: Returns pointer to device (there is only one for each seq) + * @return 0 if OK, -ve on error + */ +int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp); + +/** + * uclass_get_device_by_of_offset() - Get a uclass device by device tree node + * + * This searches the devices in the uclass for one attached to the given + * device tree node. + * + * The device is probed to activate it ready for use. + * + * @id: ID to look up + * @node: Device tree offset to search for (if -ve then -ENODEV is returned) + * @devp: Returns pointer to device (there is only one for each node) + * @return 0 if OK, -ve on error + */ +int uclass_get_device_by_of_offset(enum uclass_id id, int node, + struct udevice **devp); + +/** * uclass_first_device() - Get the first device in a uclass * * @id: Uclass ID to look up @@ -124,6 +156,21 @@ int uclass_first_device(enum uclass_id id, struct udevice **devp); int uclass_next_device(struct udevice **devp); /** + * uclass_resolve_seq() - Resolve a device's sequence number + * + * On entry dev->seq is -1, and dev->req_seq may be -1 (to allocate a + * sequence number automatically, or >= 0 to select a particular number. + * If the requested sequence number is in use, then this device will + * be allocated another one. + * + * Note that the device's seq value is not changed by this function. + * + * @dev: Device for which to allocate sequence number + * @return sequence number allocated, or -ve on error + */ +int uclass_resolve_seq(struct udevice *dev); + +/** * uclass_foreach_dev() - Helper function to iteration through devices * * This creates a for() loop which works through the available devices in |