mirror of
https://github.com/AsahiLinux/u-boot
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10cbd3b7da
With upcoming changes, dtoc will output several files for different
of-platdata components.
Add a way to output all ava!ilable files at once ('all'), to the
appropriate directories, without needing to specify each one invidually.
This puts the commands in alphabetical order, so update the tests
accordingly.
Signed-off-by: Simon Glass <sjg@chromium.org>
879 lines
32 KiB
Python
879 lines
32 KiB
Python
#!/usr/bin/python
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Copyright (C) 2017 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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"""Device tree to platform data class
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This supports converting device tree data to C structures definitions and
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static data.
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See doc/driver-model/of-plat.rst for more informaiton
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"""
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import collections
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import copy
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from enum import IntEnum
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import os
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import re
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import sys
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from dtoc import fdt
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from dtoc import fdt_util
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# When we see these properties we ignore them - i.e. do not create a structure
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# member
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PROP_IGNORE_LIST = [
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'#address-cells',
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'#gpio-cells',
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'#size-cells',
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'compatible',
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'linux,phandle',
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"status",
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'phandle',
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'u-boot,dm-pre-reloc',
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'u-boot,dm-tpl',
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'u-boot,dm-spl',
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]
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# C type declarations for the types we support
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TYPE_NAMES = {
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fdt.Type.INT: 'fdt32_t',
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fdt.Type.BYTE: 'unsigned char',
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fdt.Type.STRING: 'const char *',
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fdt.Type.BOOL: 'bool',
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fdt.Type.INT64: 'fdt64_t',
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}
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STRUCT_PREFIX = 'dtd_'
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VAL_PREFIX = 'dtv_'
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class Ftype(IntEnum):
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SOURCE, HEADER = range(2)
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# This holds information about each type of output file dtoc can create
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# type: Type of file (Ftype)
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# fname: Filename excluding directory, e.g. 'dt-platdata.c'
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OutputFile = collections.namedtuple('OutputFile', ['ftype', 'fname'])
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# This holds information about a property which includes phandles.
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#
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# max_args: integer: Maximum number or arguments that any phandle uses (int).
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# args: Number of args for each phandle in the property. The total number of
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# phandles is len(args). This is a list of integers.
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PhandleInfo = collections.namedtuple('PhandleInfo', ['max_args', 'args'])
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# Holds a single phandle link, allowing a C struct value to be assigned to point
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# to a device
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#
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# var_node: C variable to assign (e.g. 'dtv_mmc.clocks[0].node')
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# dev_name: Name of device to assign to (e.g. 'clock')
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PhandleLink = collections.namedtuple('PhandleLink', ['var_node', 'dev_name'])
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class Driver:
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"""Information about a driver in U-Boot
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Attributes:
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name: Name of driver. For U_BOOT_DRIVER(x) this is 'x'
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"""
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def __init__(self, name):
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self.name = name
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def __eq__(self, other):
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return self.name == other.name
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def __repr__(self):
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return "Driver(name='%s')" % self.name
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def conv_name_to_c(name):
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"""Convert a device-tree name to a C identifier
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This uses multiple replace() calls instead of re.sub() since it is faster
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(400ms for 1m calls versus 1000ms for the 're' version).
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Args:
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name (str): Name to convert
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Return:
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str: String containing the C version of this name
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"""
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new = name.replace('@', '_at_')
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new = new.replace('-', '_')
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new = new.replace(',', '_')
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new = new.replace('.', '_')
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return new
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def tab_to(num_tabs, line):
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"""Append tabs to a line of text to reach a tab stop.
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Args:
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num_tabs (int): Tab stop to obtain (0 = column 0, 1 = column 8, etc.)
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line (str): Line of text to append to
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Returns:
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str: line with the correct number of tabs appeneded. If the line already
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extends past that tab stop then a single space is appended.
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"""
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if len(line) >= num_tabs * 8:
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return line + ' '
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return line + '\t' * (num_tabs - len(line) // 8)
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def get_value(ftype, value):
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"""Get a value as a C expression
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For integers this returns a byte-swapped (little-endian) hex string
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For bytes this returns a hex string, e.g. 0x12
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For strings this returns a literal string enclosed in quotes
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For booleans this return 'true'
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Args:
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ftype (fdt.Type): Data type (fdt_util)
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value (bytes): Data value, as a string of bytes
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Returns:
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str: String representation of the value
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"""
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if ftype == fdt.Type.INT:
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val = '%#x' % fdt_util.fdt32_to_cpu(value)
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elif ftype == fdt.Type.BYTE:
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char = value[0]
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val = '%#x' % (ord(char) if isinstance(char, str) else char)
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elif ftype == fdt.Type.STRING:
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# Handle evil ACPI backslashes by adding another backslash before them.
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# So "\\_SB.GPO0" in the device tree effectively stays like that in C
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val = '"%s"' % value.replace('\\', '\\\\')
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elif ftype == fdt.Type.BOOL:
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val = 'true'
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else: # ftype == fdt.Type.INT64:
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val = '%#x' % value
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return val
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def get_compat_name(node):
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"""Get the node's list of compatible string as a C identifiers
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Args:
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node (fdt.Node): Node object to check
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Return:
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list of str: List of C identifiers for all the compatible strings
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"""
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compat = node.props['compatible'].value
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if not isinstance(compat, list):
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compat = [compat]
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return [conv_name_to_c(c) for c in compat]
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class DtbPlatdata():
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"""Provide a means to convert device tree binary data to platform data
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The output of this process is C structures which can be used in space-
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constrained encvironments where the ~3KB code overhead of device tree
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code is not affordable.
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Properties:
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_fdt: Fdt object, referencing the device tree
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_dtb_fname: Filename of the input device tree binary file
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_valid_nodes: A list of Node object with compatible strings. The list
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is ordered by conv_name_to_c(node.name)
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_include_disabled: true to include nodes marked status = "disabled"
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_outfile: The current output file (sys.stdout or a real file)
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_warning_disabled: true to disable warnings about driver names not found
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_lines: Stashed list of output lines for outputting in the future
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_drivers: Dict of valid driver names found in drivers/
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key: Driver name
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value: Driver for that driver
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_driver_aliases: Dict that holds aliases for driver names
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key: Driver alias declared with
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U_BOOT_DRIVER_ALIAS(driver_alias, driver_name)
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value: Driver name declared with U_BOOT_DRIVER(driver_name)
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_drivers_additional: List of additional drivers to use during scanning
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_dirname: Directory to hold output files, or None for none (all files
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go to stdout)
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"""
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def __init__(self, dtb_fname, include_disabled, warning_disabled,
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drivers_additional=None):
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self._fdt = None
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self._dtb_fname = dtb_fname
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self._valid_nodes = None
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self._include_disabled = include_disabled
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self._outfile = None
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self._warning_disabled = warning_disabled
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self._lines = []
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self._drivers = {}
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self._driver_aliases = {}
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self._drivers_additional = drivers_additional or []
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self._dirnames = [None] * len(Ftype)
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def get_normalized_compat_name(self, node):
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"""Get a node's normalized compat name
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Returns a valid driver name by retrieving node's list of compatible
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string as a C identifier and performing a check against _drivers
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and a lookup in driver_aliases printing a warning in case of failure.
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Args:
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node (Node): Node object to check
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Return:
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Tuple:
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Driver name associated with the first compatible string
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List of C identifiers for all the other compatible strings
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(possibly empty)
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In case of no match found, the return will be the same as
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get_compat_name()
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"""
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compat_list_c = get_compat_name(node)
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for compat_c in compat_list_c:
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if not compat_c in self._drivers.keys():
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compat_c = self._driver_aliases.get(compat_c)
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if not compat_c:
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continue
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aliases_c = compat_list_c
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if compat_c in aliases_c:
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aliases_c.remove(compat_c)
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return compat_c, aliases_c
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if not self._warning_disabled:
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print('WARNING: the driver %s was not found in the driver list'
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% (compat_list_c[0]))
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return compat_list_c[0], compat_list_c[1:]
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def setup_output_dirs(self, output_dirs):
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"""Set up the output directories
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This should be done before setup_output() is called
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Args:
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output_dirs (tuple of str):
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Directory to use for C output files.
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Use None to write files relative current directory
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Directory to use for H output files.
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Defaults to the C output dir
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"""
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def process_dir(ftype, dirname):
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if dirname:
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os.makedirs(dirname, exist_ok=True)
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self._dirnames[ftype] = dirname
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if output_dirs:
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c_dirname = output_dirs[0]
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h_dirname = output_dirs[1] if len(output_dirs) > 1 else c_dirname
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process_dir(Ftype.SOURCE, c_dirname)
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process_dir(Ftype.HEADER, h_dirname)
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def setup_output(self, ftype, fname):
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"""Set up the output destination
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Once this is done, future calls to self.out() will output to this
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file. The file used is as follows:
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self._dirnames[ftype] is None: output to fname, or stdout if None
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self._dirnames[ftype] is not None: output to fname in that directory
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Calling this function multiple times will close the old file and open
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the new one. If they are the same file, nothing happens and output will
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continue to the same file.
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Args:
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ftype (str): Type of file to create ('c' or 'h')
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fname (str): Filename to send output to. If there is a directory in
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self._dirnames for this file type, it will be put in that
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directory
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"""
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dirname = self._dirnames[ftype]
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if dirname:
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pathname = os.path.join(dirname, fname)
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if self._outfile:
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self._outfile.close()
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self._outfile = open(pathname, 'w')
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elif fname:
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if not self._outfile:
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self._outfile = open(fname, 'w')
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else:
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self._outfile = sys.stdout
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def finish_output(self):
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"""Finish outputing to a file
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This closes the output file, if one is in use
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"""
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if self._outfile != sys.stdout:
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self._outfile.close()
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def out(self, line):
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"""Output a string to the output file
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Args:
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line (str): String to output
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"""
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self._outfile.write(line)
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def buf(self, line):
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"""Buffer up a string to send later
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Args:
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line (str): String to add to our 'buffer' list
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"""
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self._lines.append(line)
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def get_buf(self):
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"""Get the contents of the output buffer, and clear it
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Returns:
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list(str): The output buffer, which is then cleared for future use
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"""
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lines = self._lines
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self._lines = []
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return lines
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def out_header(self):
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"""Output a message indicating that this is an auto-generated file"""
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self.out('''/*
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* DO NOT MODIFY
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*
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* This file was generated by dtoc from a .dtb (device tree binary) file.
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*/
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''')
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def get_phandle_argc(self, prop, node_name):
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"""Check if a node contains phandles
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We have no reliable way of detecting whether a node uses a phandle
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or not. As an interim measure, use a list of known property names.
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Args:
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prop (fdt.Prop): Prop object to check
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node_name (str): Node name, only used for raising an error
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Returns:
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int or None: Number of argument cells is this is a phandle,
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else None
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Raises:
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ValueError: if the phandle cannot be parsed or the required property
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is not present
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"""
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if prop.name in ['clocks', 'cd-gpios']:
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if not isinstance(prop.value, list):
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prop.value = [prop.value]
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val = prop.value
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i = 0
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max_args = 0
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args = []
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while i < len(val):
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phandle = fdt_util.fdt32_to_cpu(val[i])
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# If we get to the end of the list, stop. This can happen
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# since some nodes have more phandles in the list than others,
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# but we allocate enough space for the largest list. So those
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# nodes with shorter lists end up with zeroes at the end.
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if not phandle:
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break
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target = self._fdt.phandle_to_node.get(phandle)
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if not target:
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raise ValueError("Cannot parse '%s' in node '%s'" %
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(prop.name, node_name))
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cells = None
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for prop_name in ['#clock-cells', '#gpio-cells']:
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cells = target.props.get(prop_name)
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if cells:
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break
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if not cells:
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raise ValueError("Node '%s' has no cells property" %
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(target.name))
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num_args = fdt_util.fdt32_to_cpu(cells.value)
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max_args = max(max_args, num_args)
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args.append(num_args)
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i += 1 + num_args
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return PhandleInfo(max_args, args)
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return None
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def scan_driver(self, fname):
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"""Scan a driver file to build a list of driver names and aliases
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This procedure will populate self._drivers and self._driver_aliases
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Args
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fname: Driver filename to scan
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"""
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with open(fname, encoding='utf-8') as inf:
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try:
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buff = inf.read()
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except UnicodeDecodeError:
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# This seems to happen on older Python versions
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print("Skipping file '%s' due to unicode error" % fname)
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return
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# The following re will search for driver names declared as
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# U_BOOT_DRIVER(driver_name)
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drivers = re.findall(r'U_BOOT_DRIVER\((.*)\)', buff)
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for driver in drivers:
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self._drivers[driver] = Driver(driver)
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# The following re will search for driver aliases declared as
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# U_BOOT_DRIVER_ALIAS(alias, driver_name)
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driver_aliases = re.findall(
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r'U_BOOT_DRIVER_ALIAS\(\s*(\w+)\s*,\s*(\w+)\s*\)',
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buff)
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for alias in driver_aliases: # pragma: no cover
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if len(alias) != 2:
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continue
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self._driver_aliases[alias[1]] = alias[0]
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def scan_drivers(self):
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"""Scan the driver folders to build a list of driver names and aliases
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This procedure will populate self._drivers and self._driver_aliases
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"""
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basedir = sys.argv[0].replace('tools/dtoc/dtoc', '')
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if basedir == '':
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basedir = './'
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for (dirpath, _, filenames) in os.walk(basedir):
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for fname in filenames:
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if not fname.endswith('.c'):
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continue
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self.scan_driver(dirpath + '/' + fname)
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for fname in self._drivers_additional:
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if not isinstance(fname, str) or len(fname) == 0:
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continue
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if fname[0] == '/':
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self.scan_driver(fname)
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else:
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self.scan_driver(basedir + '/' + fname)
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def scan_dtb(self):
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"""Scan the device tree to obtain a tree of nodes and properties
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Once this is done, self._fdt.GetRoot() can be called to obtain the
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device tree root node, and progress from there.
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"""
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self._fdt = fdt.FdtScan(self._dtb_fname)
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def scan_node(self, root, valid_nodes):
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"""Scan a node and subnodes to build a tree of node and phandle info
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This adds each node to self._valid_nodes.
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Args:
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root (Node): Root node for scan
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valid_nodes (list of Node): List of Node objects to add to
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"""
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for node in root.subnodes:
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if 'compatible' in node.props:
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status = node.props.get('status')
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if (not self._include_disabled and not status or
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status.value != 'disabled'):
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valid_nodes.append(node)
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# recurse to handle any subnodes
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self.scan_node(node, valid_nodes)
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def scan_tree(self):
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"""Scan the device tree for useful information
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This fills in the following properties:
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_valid_nodes: A list of nodes we wish to consider include in the
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platform data
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"""
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valid_nodes = []
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self.scan_node(self._fdt.GetRoot(), valid_nodes)
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self._valid_nodes = sorted(valid_nodes,
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key=lambda x: conv_name_to_c(x.name))
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for idx, node in enumerate(self._valid_nodes):
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node.idx = idx
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@staticmethod
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def get_num_cells(node):
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"""Get the number of cells in addresses and sizes for this node
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Args:
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node (fdt.None): Node to check
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Returns:
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Tuple:
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Number of address cells for this node
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Number of size cells for this node
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"""
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parent = node.parent
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num_addr, num_size = 2, 2
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if parent:
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addr_prop = parent.props.get('#address-cells')
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size_prop = parent.props.get('#size-cells')
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if addr_prop:
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num_addr = fdt_util.fdt32_to_cpu(addr_prop.value)
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if size_prop:
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num_size = fdt_util.fdt32_to_cpu(size_prop.value)
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return num_addr, num_size
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def scan_reg_sizes(self):
|
|
"""Scan for 64-bit 'reg' properties and update the values
|
|
|
|
This finds 'reg' properties with 64-bit data and converts the value to
|
|
an array of 64-values. This allows it to be output in a way that the
|
|
C code can read.
|
|
"""
|
|
for node in self._valid_nodes:
|
|
reg = node.props.get('reg')
|
|
if not reg:
|
|
continue
|
|
num_addr, num_size = self.get_num_cells(node)
|
|
total = num_addr + num_size
|
|
|
|
if reg.type != fdt.Type.INT:
|
|
raise ValueError("Node '%s' reg property is not an int" %
|
|
node.name)
|
|
if len(reg.value) % total:
|
|
raise ValueError(
|
|
"Node '%s' reg property has %d cells "
|
|
'which is not a multiple of na + ns = %d + %d)' %
|
|
(node.name, len(reg.value), num_addr, num_size))
|
|
reg.num_addr = num_addr
|
|
reg.num_size = num_size
|
|
if num_addr != 1 or num_size != 1:
|
|
reg.type = fdt.Type.INT64
|
|
i = 0
|
|
new_value = []
|
|
val = reg.value
|
|
if not isinstance(val, list):
|
|
val = [val]
|
|
while i < len(val):
|
|
addr = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_addr)
|
|
i += num_addr
|
|
size = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_size)
|
|
i += num_size
|
|
new_value += [addr, size]
|
|
reg.value = new_value
|
|
|
|
def scan_structs(self):
|
|
"""Scan the device tree building up the C structures we will use.
|
|
|
|
Build a dict keyed by C struct name containing a dict of Prop
|
|
object for each struct field (keyed by property name). Where the
|
|
same struct appears multiple times, try to use the 'widest'
|
|
property, i.e. the one with a type which can express all others.
|
|
|
|
Once the widest property is determined, all other properties are
|
|
updated to match that width.
|
|
|
|
Returns:
|
|
dict of dict: dict containing structures:
|
|
key (str): Node name, as a C identifier
|
|
value: dict containing structure fields:
|
|
key (str): Field name
|
|
value: Prop object with field information
|
|
"""
|
|
structs = collections.OrderedDict()
|
|
for node in self._valid_nodes:
|
|
node_name, _ = self.get_normalized_compat_name(node)
|
|
fields = {}
|
|
|
|
# Get a list of all the valid properties in this node.
|
|
for name, prop in node.props.items():
|
|
if name not in PROP_IGNORE_LIST and name[0] != '#':
|
|
fields[name] = copy.deepcopy(prop)
|
|
|
|
# If we've seen this node_name before, update the existing struct.
|
|
if node_name in structs:
|
|
struct = structs[node_name]
|
|
for name, prop in fields.items():
|
|
oldprop = struct.get(name)
|
|
if oldprop:
|
|
oldprop.Widen(prop)
|
|
else:
|
|
struct[name] = prop
|
|
|
|
# Otherwise store this as a new struct.
|
|
else:
|
|
structs[node_name] = fields
|
|
|
|
for node in self._valid_nodes:
|
|
node_name, _ = self.get_normalized_compat_name(node)
|
|
struct = structs[node_name]
|
|
for name, prop in node.props.items():
|
|
if name not in PROP_IGNORE_LIST and name[0] != '#':
|
|
prop.Widen(struct[name])
|
|
|
|
return structs
|
|
|
|
def scan_phandles(self):
|
|
"""Figure out what phandles each node uses
|
|
|
|
We need to be careful when outputing nodes that use phandles since
|
|
they must come after the declaration of the phandles in the C file.
|
|
Otherwise we get a compiler error since the phandle struct is not yet
|
|
declared.
|
|
|
|
This function adds to each node a list of phandle nodes that the node
|
|
depends on. This allows us to output things in the right order.
|
|
"""
|
|
for node in self._valid_nodes:
|
|
node.phandles = set()
|
|
for pname, prop in node.props.items():
|
|
if pname in PROP_IGNORE_LIST or pname[0] == '#':
|
|
continue
|
|
info = self.get_phandle_argc(prop, node.name)
|
|
if info:
|
|
# Process the list as pairs of (phandle, id)
|
|
pos = 0
|
|
for args in info.args:
|
|
phandle_cell = prop.value[pos]
|
|
phandle = fdt_util.fdt32_to_cpu(phandle_cell)
|
|
target_node = self._fdt.phandle_to_node[phandle]
|
|
node.phandles.add(target_node)
|
|
pos += 1 + args
|
|
|
|
|
|
def generate_structs(self, structs):
|
|
"""Generate struct defintions for the platform data
|
|
|
|
This writes out the body of a header file consisting of structure
|
|
definitions for node in self._valid_nodes. See the documentation in
|
|
doc/driver-model/of-plat.rst for more information.
|
|
|
|
Args:
|
|
structs (dict): dict containing structures:
|
|
key (str): Node name, as a C identifier
|
|
value: dict containing structure fields:
|
|
key (str): Field name
|
|
value: Prop object with field information
|
|
|
|
"""
|
|
self.out_header()
|
|
self.out('#include <stdbool.h>\n')
|
|
self.out('#include <linux/libfdt.h>\n')
|
|
|
|
# Output the struct definition
|
|
for name in sorted(structs):
|
|
self.out('struct %s%s {\n' % (STRUCT_PREFIX, name))
|
|
for pname in sorted(structs[name]):
|
|
prop = structs[name][pname]
|
|
info = self.get_phandle_argc(prop, structs[name])
|
|
if info:
|
|
# For phandles, include a reference to the target
|
|
struct_name = 'struct phandle_%d_arg' % info.max_args
|
|
self.out('\t%s%s[%d]' % (tab_to(2, struct_name),
|
|
conv_name_to_c(prop.name),
|
|
len(info.args)))
|
|
else:
|
|
ptype = TYPE_NAMES[prop.type]
|
|
self.out('\t%s%s' % (tab_to(2, ptype),
|
|
conv_name_to_c(prop.name)))
|
|
if isinstance(prop.value, list):
|
|
self.out('[%d]' % len(prop.value))
|
|
self.out(';\n')
|
|
self.out('};\n')
|
|
|
|
def _output_list(self, node, prop):
|
|
"""Output the C code for a devicetree property that holds a list
|
|
|
|
Args:
|
|
node (fdt.Node): Node to output
|
|
prop (fdt.Prop): Prop to output
|
|
"""
|
|
self.buf('{')
|
|
vals = []
|
|
# For phandles, output a reference to the platform data
|
|
# of the target node.
|
|
info = self.get_phandle_argc(prop, node.name)
|
|
if info:
|
|
# Process the list as pairs of (phandle, id)
|
|
pos = 0
|
|
for args in info.args:
|
|
phandle_cell = prop.value[pos]
|
|
phandle = fdt_util.fdt32_to_cpu(phandle_cell)
|
|
target_node = self._fdt.phandle_to_node[phandle]
|
|
arg_values = []
|
|
for i in range(args):
|
|
arg_values.append(
|
|
str(fdt_util.fdt32_to_cpu(prop.value[pos + 1 + i])))
|
|
pos += 1 + args
|
|
vals.append('\t{%d, {%s}}' % (target_node.idx,
|
|
', '.join(arg_values)))
|
|
for val in vals:
|
|
self.buf('\n\t\t%s,' % val)
|
|
else:
|
|
for val in prop.value:
|
|
vals.append(get_value(prop.type, val))
|
|
|
|
# Put 8 values per line to avoid very long lines.
|
|
for i in range(0, len(vals), 8):
|
|
if i:
|
|
self.buf(',\n\t\t')
|
|
self.buf(', '.join(vals[i:i + 8]))
|
|
self.buf('}')
|
|
|
|
def _declare_device(self, var_name, struct_name, node_parent):
|
|
"""Add a device declaration to the output
|
|
|
|
This declares a U_BOOT_DEVICE() for the device being processed
|
|
|
|
Args:
|
|
var_name (str): C name for the node
|
|
struct_name (str): Name for the dt struct associated with the node
|
|
node_parent (Node): Parent of the node (or None if none)
|
|
"""
|
|
self.buf('U_BOOT_DEVICE(%s) = {\n' % var_name)
|
|
self.buf('\t.name\t\t= "%s",\n' % struct_name)
|
|
self.buf('\t.plat\t= &%s%s,\n' % (VAL_PREFIX, var_name))
|
|
self.buf('\t.plat_size\t= sizeof(%s%s),\n' % (VAL_PREFIX, var_name))
|
|
idx = -1
|
|
if node_parent and node_parent in self._valid_nodes:
|
|
idx = node_parent.idx
|
|
self.buf('\t.parent_idx\t= %d,\n' % idx)
|
|
self.buf('};\n')
|
|
self.buf('\n')
|
|
|
|
def _output_prop(self, node, prop):
|
|
"""Output a line containing the value of a struct member
|
|
|
|
Args:
|
|
node (Node): Node being output
|
|
prop (Prop): Prop object to output
|
|
"""
|
|
if prop.name in PROP_IGNORE_LIST or prop.name[0] == '#':
|
|
return
|
|
member_name = conv_name_to_c(prop.name)
|
|
self.buf('\t%s= ' % tab_to(3, '.' + member_name))
|
|
|
|
# Special handling for lists
|
|
if isinstance(prop.value, list):
|
|
self._output_list(node, prop)
|
|
else:
|
|
self.buf(get_value(prop.type, prop.value))
|
|
self.buf(',\n')
|
|
|
|
def _output_values(self, var_name, struct_name, node):
|
|
"""Output the definition of a device's struct values
|
|
|
|
Args:
|
|
var_name (str): C name for the node
|
|
struct_name (str): Name for the dt struct associated with the node
|
|
node (Node): Node being output
|
|
"""
|
|
self.buf('static struct %s%s %s%s = {\n' %
|
|
(STRUCT_PREFIX, struct_name, VAL_PREFIX, var_name))
|
|
for pname in sorted(node.props):
|
|
self._output_prop(node, node.props[pname])
|
|
self.buf('};\n')
|
|
|
|
def output_node(self, node):
|
|
"""Output the C code for a node
|
|
|
|
Args:
|
|
node (fdt.Node): node to output
|
|
"""
|
|
struct_name, _ = self.get_normalized_compat_name(node)
|
|
var_name = conv_name_to_c(node.name)
|
|
self.buf('/* Node %s index %d */\n' % (node.path, node.idx))
|
|
|
|
self._output_values(var_name, struct_name, node)
|
|
self._declare_device(var_name, struct_name, node.parent)
|
|
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def generate_tables(self):
|
|
"""Generate device defintions for the platform data
|
|
|
|
This writes out C platform data initialisation data and
|
|
U_BOOT_DEVICE() declarations for each valid node. Where a node has
|
|
multiple compatible strings, a #define is used to make them equivalent.
|
|
|
|
See the documentation in doc/driver-model/of-plat.rst for more
|
|
information.
|
|
"""
|
|
self.out_header()
|
|
self.out('/* Allow use of U_BOOT_DEVICE() in this file */\n')
|
|
self.out('#define DT_PLATDATA_C\n')
|
|
self.out('\n')
|
|
self.out('#include <common.h>\n')
|
|
self.out('#include <dm.h>\n')
|
|
self.out('#include <dt-structs.h>\n')
|
|
self.out('\n')
|
|
nodes_to_output = list(self._valid_nodes)
|
|
|
|
# Keep outputing nodes until there is none left
|
|
while nodes_to_output:
|
|
node = nodes_to_output[0]
|
|
# Output all the node's dependencies first
|
|
for req_node in node.phandles:
|
|
if req_node in nodes_to_output:
|
|
self.output_node(req_node)
|
|
nodes_to_output.remove(req_node)
|
|
self.output_node(node)
|
|
nodes_to_output.remove(node)
|
|
|
|
# Define dm_populate_phandle_data() which will add the linking between
|
|
# nodes using DM_GET_DEVICE
|
|
# dtv_dmc_at_xxx.clocks[0].node = DM_GET_DEVICE(clock_controller_at_xxx)
|
|
self.buf('void dm_populate_phandle_data(void) {\n')
|
|
self.buf('}\n')
|
|
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
|
|
# Types of output file we understand
|
|
# key: Command used to generate this file
|
|
# value: OutputFile for this command
|
|
OUTPUT_FILES = {
|
|
'struct': OutputFile(Ftype.HEADER, 'dt-structs-gen.h'),
|
|
'platdata': OutputFile(Ftype.SOURCE, 'dt-platdata.c'),
|
|
}
|
|
|
|
|
|
def run_steps(args, dtb_file, include_disabled, output, output_dirs,
|
|
warning_disabled=False, drivers_additional=None):
|
|
"""Run all the steps of the dtoc tool
|
|
|
|
Args:
|
|
args (list): List of non-option arguments provided to the problem
|
|
dtb_file (str): Filename of dtb file to process
|
|
include_disabled (bool): True to include disabled nodes
|
|
output (str): Name of output file (None for stdout)
|
|
output_dirs (tuple of str):
|
|
Directory to put C output files
|
|
Directory to put H output files
|
|
warning_disabled (bool): True to avoid showing warnings about missing
|
|
drivers
|
|
drivers_additional (list): List of additional drivers to use during
|
|
scanning
|
|
Raises:
|
|
ValueError: if args has no command, or an unknown command
|
|
"""
|
|
if not args:
|
|
raise ValueError('Please specify a command: struct, platdata, all')
|
|
if output and output_dirs and any(output_dirs):
|
|
raise ValueError('Must specify either output or output_dirs, not both')
|
|
|
|
plat = DtbPlatdata(dtb_file, include_disabled, warning_disabled,
|
|
drivers_additional)
|
|
plat.scan_drivers()
|
|
plat.scan_dtb()
|
|
plat.scan_tree()
|
|
plat.scan_reg_sizes()
|
|
plat.setup_output_dirs(output_dirs)
|
|
structs = plat.scan_structs()
|
|
plat.scan_phandles()
|
|
|
|
cmds = args[0].split(',')
|
|
if 'all' in cmds:
|
|
cmds = sorted(OUTPUT_FILES.keys())
|
|
for cmd in cmds:
|
|
outfile = OUTPUT_FILES.get(cmd)
|
|
if not outfile:
|
|
raise ValueError("Unknown command '%s': (use: %s)" %
|
|
(cmd, ', '.join(sorted(OUTPUT_FILES.keys()))))
|
|
plat.setup_output(outfile.ftype,
|
|
outfile.fname if output_dirs else output)
|
|
if cmd == 'struct':
|
|
plat.generate_structs(structs)
|
|
elif cmd == 'platdata':
|
|
plat.generate_tables()
|
|
plat.finish_output()
|