740 lines
28 KiB
Python
740 lines
28 KiB
Python
#!/usr/bin/python
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Copyright (C) 2017 Google, Inc
|
|
# Written by Simon Glass <sjg@chromium.org>
|
|
#
|
|
|
|
"""Scanning of U-Boot source for drivers and structs
|
|
|
|
This scans the source tree to find out things about all instances of
|
|
U_BOOT_DRIVER(), UCLASS_DRIVER and all struct declarations in header files.
|
|
|
|
See doc/driver-model/of-plat.rst for more informaiton
|
|
"""
|
|
|
|
import os
|
|
import re
|
|
import sys
|
|
|
|
|
|
def conv_name_to_c(name):
|
|
"""Convert a device-tree name to a C identifier
|
|
|
|
This uses multiple replace() calls instead of re.sub() since it is faster
|
|
(400ms for 1m calls versus 1000ms for the 're' version).
|
|
|
|
Args:
|
|
name (str): Name to convert
|
|
Return:
|
|
str: String containing the C version of this name
|
|
"""
|
|
new = name.replace('@', '_at_')
|
|
new = new.replace('-', '_')
|
|
new = new.replace(',', '_')
|
|
new = new.replace('.', '_')
|
|
if new == '/':
|
|
return 'root'
|
|
return new
|
|
|
|
def get_compat_name(node):
|
|
"""Get the node's list of compatible string as a C identifiers
|
|
|
|
Args:
|
|
node (fdt.Node): Node object to check
|
|
Return:
|
|
list of str: List of C identifiers for all the compatible strings
|
|
"""
|
|
compat = node.props['compatible'].value
|
|
if not isinstance(compat, list):
|
|
compat = [compat]
|
|
return [conv_name_to_c(c) for c in compat]
|
|
|
|
|
|
class Driver:
|
|
"""Information about a driver in U-Boot
|
|
|
|
Attributes:
|
|
name: Name of driver. For U_BOOT_DRIVER(x) this is 'x'
|
|
fname: Filename where the driver was found
|
|
uclass_id: Name of uclass, e.g. 'UCLASS_I2C'
|
|
compat: Driver data for each compatible string:
|
|
key: Compatible string, e.g. 'rockchip,rk3288-grf'
|
|
value: Driver data, e,g, 'ROCKCHIP_SYSCON_GRF', or None
|
|
fname: Filename where the driver was found
|
|
priv (str): struct name of the priv_auto member, e.g. 'serial_priv'
|
|
plat (str): struct name of the plat_auto member, e.g. 'serial_plat'
|
|
child_priv (str): struct name of the per_child_auto member,
|
|
e.g. 'pci_child_priv'
|
|
child_plat (str): struct name of the per_child_plat_auto member,
|
|
e.g. 'pci_child_plat'
|
|
used (bool): True if the driver is used by the structs being output
|
|
phase (str): Which phase of U-Boot to use this driver
|
|
headers (list): List of header files needed for this driver (each a str)
|
|
e.g. ['<asm/cpu.h>']
|
|
dups (list): Driver objects with the same name as this one, that were
|
|
found after this one
|
|
warn_dups (bool): True if the duplicates are not distinguisble using
|
|
the phase
|
|
uclass (Uclass): uclass for this driver
|
|
"""
|
|
def __init__(self, name, fname):
|
|
self.name = name
|
|
self.fname = fname
|
|
self.uclass_id = None
|
|
self.compat = None
|
|
self.priv = ''
|
|
self.plat = ''
|
|
self.child_priv = ''
|
|
self.child_plat = ''
|
|
self.used = False
|
|
self.phase = ''
|
|
self.headers = []
|
|
self.dups = []
|
|
self.warn_dups = False
|
|
self.uclass = None
|
|
|
|
def __eq__(self, other):
|
|
return (self.name == other.name and
|
|
self.uclass_id == other.uclass_id and
|
|
self.compat == other.compat and
|
|
self.priv == other.priv and
|
|
self.plat == other.plat and
|
|
self.used == other.used)
|
|
|
|
def __repr__(self):
|
|
return ("Driver(name='%s', used=%s, uclass_id='%s', compat=%s, priv=%s)" %
|
|
(self.name, self.used, self.uclass_id, self.compat, self.priv))
|
|
|
|
|
|
class UclassDriver:
|
|
"""Holds information about a uclass driver
|
|
|
|
Attributes:
|
|
name: Uclass name, e.g. 'i2c' if the driver is for UCLASS_I2C
|
|
uclass_id: Uclass ID, e.g. 'UCLASS_I2C'
|
|
priv: struct name of the private data, e.g. 'i2c_priv'
|
|
per_dev_priv (str): struct name of the priv_auto member, e.g. 'spi_info'
|
|
per_dev_plat (str): struct name of the plat_auto member, e.g. 'i2c_chip'
|
|
per_child_priv (str): struct name of the per_child_auto member,
|
|
e.g. 'pci_child_priv'
|
|
per_child_plat (str): struct name of the per_child_plat_auto member,
|
|
e.g. 'pci_child_plat'
|
|
alias_num_to_node (dict): Aliases for this uclasses (for sequence
|
|
numbers)
|
|
key (int): Alias number, e.g. 2 for "pci2"
|
|
value (str): Node the alias points to
|
|
alias_path_to_num (dict): Convert a path to an alias number
|
|
key (str): Full path to node (e.g. '/soc/pci')
|
|
seq (int): Alias number, e.g. 2 for "pci2"
|
|
devs (list): List of devices in this uclass, each a Node
|
|
node_refs (dict): References in the linked list of devices:
|
|
key (int): Sequence number (0=first, n-1=last, -1=head, n=tail)
|
|
value (str): Reference to the device at that position
|
|
"""
|
|
def __init__(self, name):
|
|
self.name = name
|
|
self.uclass_id = None
|
|
self.priv = ''
|
|
self.per_dev_priv = ''
|
|
self.per_dev_plat = ''
|
|
self.per_child_priv = ''
|
|
self.per_child_plat = ''
|
|
self.alias_num_to_node = {}
|
|
self.alias_path_to_num = {}
|
|
self.devs = []
|
|
self.node_refs = {}
|
|
|
|
def __eq__(self, other):
|
|
return (self.name == other.name and
|
|
self.uclass_id == other.uclass_id and
|
|
self.priv == other.priv)
|
|
|
|
def __repr__(self):
|
|
return ("UclassDriver(name='%s', uclass_id='%s')" %
|
|
(self.name, self.uclass_id))
|
|
|
|
def __hash__(self):
|
|
# We can use the uclass ID since it is unique among uclasses
|
|
return hash(self.uclass_id)
|
|
|
|
|
|
class Struct:
|
|
"""Holds information about a struct definition
|
|
|
|
Attributes:
|
|
name: Struct name, e.g. 'fred' if the struct is 'struct fred'
|
|
fname: Filename containing the struct, in a format that C files can
|
|
include, e.g. 'asm/clk.h'
|
|
"""
|
|
def __init__(self, name, fname):
|
|
self.name = name
|
|
self.fname =fname
|
|
|
|
def __repr__(self):
|
|
return ("Struct(name='%s', fname='%s')" % (self.name, self.fname))
|
|
|
|
|
|
class Scanner:
|
|
"""Scanning of the U-Boot source tree
|
|
|
|
Properties:
|
|
_basedir (str): Base directory of U-Boot source code. Defaults to the
|
|
grandparent of this file's directory
|
|
_drivers: Dict of valid driver names found in drivers/
|
|
key: Driver name
|
|
value: Driver for that driver
|
|
_driver_aliases: Dict that holds aliases for driver names
|
|
key: Driver alias declared with
|
|
DM_DRIVER_ALIAS(driver_alias, driver_name)
|
|
value: Driver name declared with U_BOOT_DRIVER(driver_name)
|
|
_drivers_additional (list or str): List of additional drivers to use
|
|
during scanning
|
|
_of_match: Dict holding information about compatible strings
|
|
key: Name of struct udevice_id variable
|
|
value: Dict of compatible info in that variable:
|
|
key: Compatible string, e.g. 'rockchip,rk3288-grf'
|
|
value: Driver data, e,g, 'ROCKCHIP_SYSCON_GRF', or None
|
|
_compat_to_driver: Maps compatible strings to Driver
|
|
_uclass: Dict of uclass information
|
|
key: uclass name, e.g. 'UCLASS_I2C'
|
|
value: UClassDriver
|
|
_structs: Dict of all structs found in U-Boot:
|
|
key: Name of struct
|
|
value: Struct object
|
|
_phase: The phase of U-Boot that we are generating data for, e.g. 'spl'
|
|
or 'tpl'. None if not known
|
|
"""
|
|
def __init__(self, basedir, drivers_additional, phase=''):
|
|
"""Set up a new Scanner
|
|
"""
|
|
if not basedir:
|
|
basedir = sys.argv[0].replace('tools/dtoc/dtoc', '')
|
|
if basedir == '':
|
|
basedir = './'
|
|
self._basedir = basedir
|
|
self._drivers = {}
|
|
self._driver_aliases = {}
|
|
self._drivers_additional = drivers_additional or []
|
|
self._missing_drivers = set()
|
|
self._of_match = {}
|
|
self._compat_to_driver = {}
|
|
self._uclass = {}
|
|
self._structs = {}
|
|
self._phase = phase
|
|
|
|
def get_driver(self, name):
|
|
"""Get a driver given its name
|
|
|
|
Args:
|
|
name (str): Driver name
|
|
|
|
Returns:
|
|
Driver: Driver or None if not found
|
|
"""
|
|
return self._drivers.get(name)
|
|
|
|
def get_normalized_compat_name(self, node):
|
|
"""Get a node's normalized compat name
|
|
|
|
Returns a valid driver name by retrieving node's list of compatible
|
|
string as a C identifier and performing a check against _drivers
|
|
and a lookup in driver_aliases printing a warning in case of failure.
|
|
|
|
Args:
|
|
node (Node): Node object to check
|
|
Return:
|
|
Tuple:
|
|
Driver name associated with the first compatible string
|
|
List of C identifiers for all the other compatible strings
|
|
(possibly empty)
|
|
In case of no match found, the return will be the same as
|
|
get_compat_name()
|
|
"""
|
|
if not node.parent:
|
|
compat_list_c = ['root_driver']
|
|
else:
|
|
compat_list_c = get_compat_name(node)
|
|
|
|
for compat_c in compat_list_c:
|
|
if not compat_c in self._drivers.keys():
|
|
compat_c = self._driver_aliases.get(compat_c)
|
|
if not compat_c:
|
|
continue
|
|
|
|
aliases_c = compat_list_c
|
|
if compat_c in aliases_c:
|
|
aliases_c.remove(compat_c)
|
|
return compat_c, aliases_c
|
|
|
|
self._missing_drivers.add(compat_list_c[0])
|
|
|
|
return compat_list_c[0], compat_list_c[1:]
|
|
|
|
def _parse_structs(self, fname, buff):
|
|
"""Parse a H file to extract struct definitions contained within
|
|
|
|
This parses 'struct xx {' definitions to figure out what structs this
|
|
header defines.
|
|
|
|
Args:
|
|
buff (str): Contents of file
|
|
fname (str): Filename (to use when printing errors)
|
|
"""
|
|
structs = {}
|
|
|
|
re_struct = re.compile('^struct ([a-z0-9_]+) {$')
|
|
re_asm = re.compile('../arch/[a-z0-9]+/include/asm/(.*)')
|
|
prefix = ''
|
|
for line in buff.splitlines():
|
|
# Handle line continuation
|
|
if prefix:
|
|
line = prefix + line
|
|
prefix = ''
|
|
if line.endswith('\\'):
|
|
prefix = line[:-1]
|
|
continue
|
|
|
|
m_struct = re_struct.match(line)
|
|
if m_struct:
|
|
name = m_struct.group(1)
|
|
include_dir = os.path.join(self._basedir, 'include')
|
|
rel_fname = os.path.relpath(fname, include_dir)
|
|
m_asm = re_asm.match(rel_fname)
|
|
if m_asm:
|
|
rel_fname = 'asm/' + m_asm.group(1)
|
|
structs[name] = Struct(name, rel_fname)
|
|
self._structs.update(structs)
|
|
|
|
@classmethod
|
|
def _get_re_for_member(cls, member):
|
|
"""_get_re_for_member: Get a compiled regular expression
|
|
|
|
Args:
|
|
member (str): Struct member name, e.g. 'priv_auto'
|
|
|
|
Returns:
|
|
re.Pattern: Compiled regular expression that parses:
|
|
|
|
.member = sizeof(struct fred),
|
|
|
|
and returns "fred" as group 1
|
|
"""
|
|
return re.compile(r'^\s*.%s\s*=\s*sizeof\(struct\s+(.*)\),$' % member)
|
|
|
|
def _parse_uclass_driver(self, fname, buff):
|
|
"""Parse a C file to extract uclass driver information contained within
|
|
|
|
This parses UCLASS_DRIVER() structs to obtain various pieces of useful
|
|
information.
|
|
|
|
It updates the following member:
|
|
_uclass: Dict of uclass information
|
|
key: uclass name, e.g. 'UCLASS_I2C'
|
|
value: UClassDriver
|
|
|
|
Args:
|
|
fname (str): Filename being parsed (used for warnings)
|
|
buff (str): Contents of file
|
|
"""
|
|
uc_drivers = {}
|
|
|
|
# Collect the driver name and associated Driver
|
|
driver = None
|
|
re_driver = re.compile(r'^UCLASS_DRIVER\((.*)\)')
|
|
|
|
# Collect the uclass ID, e.g. 'UCLASS_SPI'
|
|
re_id = re.compile(r'\s*\.id\s*=\s*(UCLASS_[A-Z0-9_]+)')
|
|
|
|
# Matches the header/size information for uclass-private data
|
|
re_priv = self._get_re_for_member('priv_auto')
|
|
|
|
# Set up parsing for the auto members
|
|
re_per_device_priv = self._get_re_for_member('per_device_auto')
|
|
re_per_device_plat = self._get_re_for_member('per_device_plat_auto')
|
|
re_per_child_priv = self._get_re_for_member('per_child_auto')
|
|
re_per_child_plat = self._get_re_for_member('per_child_plat_auto')
|
|
|
|
prefix = ''
|
|
for line in buff.splitlines():
|
|
# Handle line continuation
|
|
if prefix:
|
|
line = prefix + line
|
|
prefix = ''
|
|
if line.endswith('\\'):
|
|
prefix = line[:-1]
|
|
continue
|
|
|
|
driver_match = re_driver.search(line)
|
|
|
|
# If we have seen UCLASS_DRIVER()...
|
|
if driver:
|
|
m_id = re_id.search(line)
|
|
m_priv = re_priv.match(line)
|
|
m_per_dev_priv = re_per_device_priv.match(line)
|
|
m_per_dev_plat = re_per_device_plat.match(line)
|
|
m_per_child_priv = re_per_child_priv.match(line)
|
|
m_per_child_plat = re_per_child_plat.match(line)
|
|
if m_id:
|
|
driver.uclass_id = m_id.group(1)
|
|
elif m_priv:
|
|
driver.priv = m_priv.group(1)
|
|
elif m_per_dev_priv:
|
|
driver.per_dev_priv = m_per_dev_priv.group(1)
|
|
elif m_per_dev_plat:
|
|
driver.per_dev_plat = m_per_dev_plat.group(1)
|
|
elif m_per_child_priv:
|
|
driver.per_child_priv = m_per_child_priv.group(1)
|
|
elif m_per_child_plat:
|
|
driver.per_child_plat = m_per_child_plat.group(1)
|
|
elif '};' in line:
|
|
if not driver.uclass_id:
|
|
raise ValueError(
|
|
"%s: Cannot parse uclass ID in driver '%s'" %
|
|
(fname, driver.name))
|
|
uc_drivers[driver.uclass_id] = driver
|
|
driver = None
|
|
|
|
elif driver_match:
|
|
driver_name = driver_match.group(1)
|
|
driver = UclassDriver(driver_name)
|
|
|
|
self._uclass.update(uc_drivers)
|
|
|
|
def _parse_driver(self, fname, buff):
|
|
"""Parse a C file to extract driver information contained within
|
|
|
|
This parses U_BOOT_DRIVER() structs to obtain various pieces of useful
|
|
information.
|
|
|
|
It updates the following members:
|
|
_drivers - updated with new Driver records for each driver found
|
|
in the file
|
|
_of_match - updated with each compatible string found in the file
|
|
_compat_to_driver - Maps compatible string to Driver
|
|
_driver_aliases - Maps alias names to driver name
|
|
|
|
Args:
|
|
fname (str): Filename being parsed (used for warnings)
|
|
buff (str): Contents of file
|
|
|
|
Raises:
|
|
ValueError: Compatible variable is mentioned in .of_match in
|
|
U_BOOT_DRIVER() but not found in the file
|
|
"""
|
|
# Dict holding information about compatible strings collected in this
|
|
# function so far
|
|
# key: Name of struct udevice_id variable
|
|
# value: Dict of compatible info in that variable:
|
|
# key: Compatible string, e.g. 'rockchip,rk3288-grf'
|
|
# value: Driver data, e,g, 'ROCKCHIP_SYSCON_GRF', or None
|
|
of_match = {}
|
|
|
|
# Dict holding driver information collected in this function so far
|
|
# key: Driver name (C name as in U_BOOT_DRIVER(xxx))
|
|
# value: Driver
|
|
drivers = {}
|
|
|
|
# Collect the driver info
|
|
driver = None
|
|
re_driver = re.compile(r'^U_BOOT_DRIVER\((.*)\)')
|
|
|
|
# Collect the uclass ID, e.g. 'UCLASS_SPI'
|
|
re_id = re.compile(r'\s*\.id\s*=\s*(UCLASS_[A-Z0-9_]+)')
|
|
|
|
# Collect the compatible string, e.g. 'rockchip,rk3288-grf'
|
|
compat = None
|
|
re_compat = re.compile(r'{\s*.compatible\s*=\s*"(.*)"\s*'
|
|
r'(,\s*.data\s*=\s*(\S*))?\s*},')
|
|
|
|
# This is a dict of compatible strings that were found:
|
|
# key: Compatible string, e.g. 'rockchip,rk3288-grf'
|
|
# value: Driver data, e,g, 'ROCKCHIP_SYSCON_GRF', or None
|
|
compat_dict = {}
|
|
|
|
# Holds the var nane of the udevice_id list, e.g.
|
|
# 'rk3288_syscon_ids_noc' in
|
|
# static const struct udevice_id rk3288_syscon_ids_noc[] = {
|
|
ids_name = None
|
|
re_ids = re.compile(r'struct udevice_id (.*)\[\]\s*=')
|
|
|
|
# Matches the references to the udevice_id list
|
|
re_of_match = re.compile(
|
|
r'\.of_match\s*=\s*(of_match_ptr\()?([a-z0-9_]+)(\))?,')
|
|
|
|
re_phase = re.compile('^\s*DM_PHASE\((.*)\).*$')
|
|
re_hdr = re.compile('^\s*DM_HEADER\((.*)\).*$')
|
|
re_alias = re.compile(r'DM_DRIVER_ALIAS\(\s*(\w+)\s*,\s*(\w+)\s*\)')
|
|
|
|
# Matches the struct name for priv, plat
|
|
re_priv = self._get_re_for_member('priv_auto')
|
|
re_plat = self._get_re_for_member('plat_auto')
|
|
re_child_priv = self._get_re_for_member('per_child_auto')
|
|
re_child_plat = self._get_re_for_member('per_child_plat_auto')
|
|
|
|
prefix = ''
|
|
for line in buff.splitlines():
|
|
# Handle line continuation
|
|
if prefix:
|
|
line = prefix + line
|
|
prefix = ''
|
|
if line.endswith('\\'):
|
|
prefix = line[:-1]
|
|
continue
|
|
|
|
driver_match = re_driver.search(line)
|
|
|
|
# If this line contains U_BOOT_DRIVER()...
|
|
if driver:
|
|
m_id = re_id.search(line)
|
|
m_of_match = re_of_match.search(line)
|
|
m_priv = re_priv.match(line)
|
|
m_plat = re_plat.match(line)
|
|
m_cplat = re_child_plat.match(line)
|
|
m_cpriv = re_child_priv.match(line)
|
|
m_phase = re_phase.match(line)
|
|
m_hdr = re_hdr.match(line)
|
|
if m_priv:
|
|
driver.priv = m_priv.group(1)
|
|
elif m_plat:
|
|
driver.plat = m_plat.group(1)
|
|
elif m_cplat:
|
|
driver.child_plat = m_cplat.group(1)
|
|
elif m_cpriv:
|
|
driver.child_priv = m_cpriv.group(1)
|
|
elif m_id:
|
|
driver.uclass_id = m_id.group(1)
|
|
elif m_of_match:
|
|
compat = m_of_match.group(2)
|
|
elif m_phase:
|
|
driver.phase = m_phase.group(1)
|
|
elif m_hdr:
|
|
driver.headers.append(m_hdr.group(1))
|
|
elif '};' in line:
|
|
is_root = driver.name == 'root_driver'
|
|
if driver.uclass_id and (compat or is_root):
|
|
if not is_root:
|
|
if compat not in of_match:
|
|
raise ValueError(
|
|
"%s: Unknown compatible var '%s' (found: %s)" %
|
|
(fname, compat, ','.join(of_match.keys())))
|
|
driver.compat = of_match[compat]
|
|
|
|
# This needs to be deterministic, since a driver may
|
|
# have multiple compatible strings pointing to it.
|
|
# We record the one earliest in the alphabet so it
|
|
# will produce the same result on all machines.
|
|
for compat_id in of_match[compat]:
|
|
old = self._compat_to_driver.get(compat_id)
|
|
if not old or driver.name < old.name:
|
|
self._compat_to_driver[compat_id] = driver
|
|
drivers[driver.name] = driver
|
|
else:
|
|
# The driver does not have a uclass or compat string.
|
|
# The first is required but the second is not, so just
|
|
# ignore this.
|
|
pass
|
|
driver = None
|
|
ids_name = None
|
|
compat = None
|
|
compat_dict = {}
|
|
|
|
elif ids_name:
|
|
compat_m = re_compat.search(line)
|
|
if compat_m:
|
|
compat_dict[compat_m.group(1)] = compat_m.group(3)
|
|
elif '};' in line:
|
|
of_match[ids_name] = compat_dict
|
|
ids_name = None
|
|
elif driver_match:
|
|
driver_name = driver_match.group(1)
|
|
driver = Driver(driver_name, fname)
|
|
else:
|
|
ids_m = re_ids.search(line)
|
|
m_alias = re_alias.match(line)
|
|
if ids_m:
|
|
ids_name = ids_m.group(1)
|
|
elif m_alias:
|
|
self._driver_aliases[m_alias[2]] = m_alias[1]
|
|
|
|
# Make the updates based on what we found
|
|
for driver in drivers.values():
|
|
if driver.name in self._drivers:
|
|
orig = self._drivers[driver.name]
|
|
if self._phase:
|
|
# If the original driver matches our phase, use it
|
|
if orig.phase == self._phase:
|
|
orig.dups.append(driver)
|
|
continue
|
|
|
|
# Otherwise use the new driver, which is assumed to match
|
|
else:
|
|
# We have no way of distinguishing them
|
|
driver.warn_dups = True
|
|
driver.dups.append(orig)
|
|
self._drivers[driver.name] = driver
|
|
self._of_match.update(of_match)
|
|
|
|
def show_warnings(self):
|
|
"""Show any warnings that have been collected"""
|
|
for name in sorted(list(self._missing_drivers)):
|
|
print('WARNING: the driver %s was not found in the driver list'
|
|
% name)
|
|
|
|
def scan_driver(self, fname):
|
|
"""Scan a driver file to build a list of driver names and aliases
|
|
|
|
It updates the following members:
|
|
_drivers - updated with new Driver records for each driver found
|
|
in the file
|
|
_of_match - updated with each compatible string found in the file
|
|
_compat_to_driver - Maps compatible string to Driver
|
|
_driver_aliases - Maps alias names to driver name
|
|
|
|
Args
|
|
fname: Driver filename to scan
|
|
"""
|
|
with open(fname, encoding='utf-8') as inf:
|
|
try:
|
|
buff = inf.read()
|
|
except UnicodeDecodeError:
|
|
# This seems to happen on older Python versions
|
|
print("Skipping file '%s' due to unicode error" % fname)
|
|
return
|
|
|
|
# If this file has any U_BOOT_DRIVER() declarations, process it to
|
|
# obtain driver information
|
|
if 'U_BOOT_DRIVER' in buff:
|
|
self._parse_driver(fname, buff)
|
|
if 'UCLASS_DRIVER' in buff:
|
|
self._parse_uclass_driver(fname, buff)
|
|
|
|
def scan_header(self, fname):
|
|
"""Scan a header file to build a list of struct definitions
|
|
|
|
It updates the following members:
|
|
_structs - updated with new Struct records for each struct found
|
|
in the file
|
|
|
|
Args
|
|
fname: header filename to scan
|
|
"""
|
|
with open(fname, encoding='utf-8') as inf:
|
|
try:
|
|
buff = inf.read()
|
|
except UnicodeDecodeError:
|
|
# This seems to happen on older Python versions
|
|
print("Skipping file '%s' due to unicode error" % fname)
|
|
return
|
|
|
|
# If this file has any U_BOOT_DRIVER() declarations, process it to
|
|
# obtain driver information
|
|
if 'struct' in buff:
|
|
self._parse_structs(fname, buff)
|
|
|
|
def scan_drivers(self):
|
|
"""Scan the driver folders to build a list of driver names and aliases
|
|
|
|
This procedure will populate self._drivers and self._driver_aliases
|
|
"""
|
|
for (dirpath, _, filenames) in os.walk(self._basedir):
|
|
rel_path = dirpath[len(self._basedir):]
|
|
if rel_path.startswith('/'):
|
|
rel_path = rel_path[1:]
|
|
if rel_path.startswith('build') or rel_path.startswith('.git'):
|
|
continue
|
|
for fname in filenames:
|
|
pathname = dirpath + '/' + fname
|
|
if fname.endswith('.c'):
|
|
self.scan_driver(pathname)
|
|
elif fname.endswith('.h'):
|
|
self.scan_header(pathname)
|
|
for fname in self._drivers_additional:
|
|
if not isinstance(fname, str) or len(fname) == 0:
|
|
continue
|
|
if fname[0] == '/':
|
|
self.scan_driver(fname)
|
|
else:
|
|
self.scan_driver(self._basedir + '/' + fname)
|
|
|
|
# Get the uclass for each driver
|
|
# TODO: Can we just get the uclass for the ones we use, e.g. in
|
|
# mark_used()?
|
|
for driver in self._drivers.values():
|
|
driver.uclass = self._uclass.get(driver.uclass_id)
|
|
|
|
def mark_used(self, nodes):
|
|
"""Mark the drivers associated with a list of nodes as 'used'
|
|
|
|
This takes a list of nodes, finds the driver for each one and marks it
|
|
as used.
|
|
|
|
If two used drivers have the same name, issue a warning.
|
|
|
|
Args:
|
|
nodes (list of None): Nodes that are in use
|
|
"""
|
|
# Figure out which drivers we actually use
|
|
for node in nodes:
|
|
struct_name, _ = self.get_normalized_compat_name(node)
|
|
driver = self._drivers.get(struct_name)
|
|
if driver:
|
|
driver.used = True
|
|
if driver.dups and driver.warn_dups:
|
|
print("Warning: Duplicate driver name '%s' (orig=%s, dups=%s)" %
|
|
(driver.name, driver.fname,
|
|
', '.join([drv.fname for drv in driver.dups])))
|
|
|
|
def add_uclass_alias(self, name, num, node):
|
|
"""Add an alias to a uclass
|
|
|
|
Args:
|
|
name: Name of uclass, e.g. 'i2c'
|
|
num: Alias number, e.g. 2 for alias 'i2c2'
|
|
node: Node the alias points to, or None if None
|
|
|
|
Returns:
|
|
True if the node was added
|
|
False if the node was not added (uclass of that name not found)
|
|
None if the node could not be added because it was None
|
|
"""
|
|
for uclass in self._uclass.values():
|
|
if uclass.name == name:
|
|
if node is None:
|
|
return None
|
|
uclass.alias_num_to_node[int(num)] = node
|
|
uclass.alias_path_to_num[node.path] = int(num)
|
|
return True
|
|
return False
|
|
|
|
def assign_seq(self, node):
|
|
"""Figure out the sequence number for a node
|
|
|
|
This looks in the node's uclass and assigns a sequence number if needed,
|
|
based on the aliases and other nodes in that uclass.
|
|
|
|
It updates the uclass alias_path_to_num and alias_num_to_node
|
|
|
|
Args:
|
|
node (Node): Node object to look up
|
|
"""
|
|
if node.driver and node.seq == -1 and node.uclass:
|
|
uclass = node.uclass
|
|
num = uclass.alias_path_to_num.get(node.path)
|
|
if num is not None:
|
|
return num
|
|
else:
|
|
# Dynamically allocate the next available value after all
|
|
# existing ones
|
|
if uclass.alias_num_to_node:
|
|
start = max(uclass.alias_num_to_node.keys())
|
|
else:
|
|
start = -1
|
|
for seq in range(start + 1, 1000):
|
|
if seq not in uclass.alias_num_to_node:
|
|
break
|
|
uclass.alias_path_to_num[node.path] = seq
|
|
uclass.alias_num_to_node[seq] = node
|
|
return seq
|
|
return None
|