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0c7cdd0302
This produces a pylint error at present. Fix it. Signed-off-by: Simon Glass <sjg@chromium.org>
1230 lines
46 KiB
Python
1230 lines
46 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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from dtoc import src_scan
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from dtoc.src_scan import conv_name_to_c
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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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# Properties which are considered to be phandles
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# key: property name
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# value: name of associated #cells property in the target node
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#
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# New phandle properties must be added here; otherwise they will come through as
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# simple integers and finding devices by phandle will not work.
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# Any property that ends with one of these (e.g. 'cd-gpios') will be considered
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# a phandle property.
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PHANDLE_PROPS = {
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'clocks': '#clock-cells',
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'interrupts-extended': '#interrupt-cells',
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'gpios': '#gpio-cells',
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'sandbox,emul': '#emul-cells',
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}
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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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# ftype: Type of file (Ftype)
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# fname: Filename excluding directory, e.g. 'dt-plat.c'
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# hdr_comment: Comment explaining the purpose of the file
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OutputFile = collections.namedtuple('OutputFile',
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['ftype', 'fname', 'method', 'hdr_comment'])
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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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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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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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_scan: Scan object, for scanning and reporting on useful information
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from the U-Boot source code
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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_unsorted: A list of Node object with compatible strings,
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ordered by devicetree node order
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_valid_nodes: A list of Node object with compatible strings, ordered by
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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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_lines: Stashed list of output lines for outputting in the future
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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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_struct_data (dict): OrderedDict of dtplat structures to output
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key (str): Node name, as a C identifier
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value: dict containing structure fields:
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key (str): Field name
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value: Prop object with field information
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_basedir (str): Base directory of source tree
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_valid_uclasses (list of src_scan.Uclass): List of uclasses needed for
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the selected devices (see _valid_node), in alphabetical order
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_instantiate: Instantiate devices so they don't need to be bound at
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run-time
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"""
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def __init__(self, scan, dtb_fname, include_disabled, instantiate=False):
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self._scan = scan
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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._valid_nodes_unsorted = None
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self._include_disabled = include_disabled
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self._outfile = None
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self._lines = []
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self._dirnames = [None] * len(Ftype)
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self._struct_data = collections.OrderedDict()
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self._basedir = None
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self._valid_uclasses = None
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self._instantiate = instantiate
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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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self._outfile = None
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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, outfile):
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"""Output a message indicating that this is an auto-generated file
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Args:
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outfile: OutputFile describing the file being generated
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"""
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self.out('''/*
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* DO NOT MODIFY
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*
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* %s.
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* This was generated by dtoc from a .dtb (device tree binary) file.
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*/
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''' % outfile.hdr_comment)
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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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cells_prop = None
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for name, cprop in PHANDLE_PROPS.items():
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if prop.name.endswith(name):
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cells_prop = cprop
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if cells_prop:
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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 = target.props.get(cells_prop)
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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_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, node, 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 subnode to self._valid_nodes if it is enabled and has a
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compatible string.
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Args:
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node (Node): Node for scan for subnodes
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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 subnode in node.subnodes:
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if 'compatible' in subnode.props:
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status = subnode.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(subnode)
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# recurse to handle any subnodes
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self.scan_node(subnode, valid_nodes)
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def scan_tree(self, add_root):
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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_unsorted: A list of nodes we wish to consider include
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in the platform data (in devicetree node order)
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_valid_nodes: Sorted version of _valid_nodes_unsorted
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Args:
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add_root: True to add the root node also (which wouldn't normally
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be added as it may not have a compatible string)
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"""
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root = self._fdt.GetRoot()
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valid_nodes = []
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if add_root:
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valid_nodes.append(root)
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self.scan_node(root, valid_nodes)
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self._valid_nodes_unsorted = 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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def prepare_nodes(self):
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"""Add extra properties to the nodes we are using
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The following properties are added for use by dtoc:
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idx: Index number of this node (0=first, etc.)
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struct_name: Name of the struct dtd used by this node
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var_name: C name for this node
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child_devs: List of child devices for this node, each a None
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child_refs: Dict of references for each child:
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key: Position in child list (-1=head, 0=first, 1=second, ...
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n-1=last, n=head)
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seq: Sequence number of the device (unique within its uclass), or
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-1 not not known yet
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dev_ref: Reference to this device, e.g. 'DM_DEVICE_REF(serial)'
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driver: Driver record for this node, or None if not known
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uclass: Uclass record for this node, or None if not known
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uclass_seq: Position of this device within the uclass list (0=first,
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n-1=last)
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parent_seq: Position of this device within it siblings (0=first,
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n-1=last)
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parent_driver: Driver record of the node's parent, or None if none.
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We don't use node.parent.driver since node.parent may not be in
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the list of valid nodes
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"""
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for idx, node in enumerate(self._valid_nodes):
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node.idx = idx
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node.struct_name, _ = self._scan.get_normalized_compat_name(node)
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node.var_name = conv_name_to_c(node.name)
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node.child_devs = []
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node.child_refs = {}
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node.seq = -1
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node.dev_ref = None
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node.driver = None
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node.uclass = None
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node.uclass_seq = None
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node.parent_seq = None
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node.parent_driver = None
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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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if parent and not parent.props:
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raise ValueError("Parent node '%s' has no properties - do you need u-boot,dm-spl or similar?" %
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parent.path)
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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):
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"""Scan for 64-bit 'reg' properties and update the values
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This finds 'reg' properties with 64-bit data and converts the value to
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an array of 64-values. This allows it to be output in a way that the
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C code can read.
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"""
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for node in self._valid_nodes:
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reg = node.props.get('reg')
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if not reg:
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continue
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num_addr, num_size = self.get_num_cells(node)
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total = num_addr + num_size
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if reg.type != fdt.Type.INT:
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raise ValueError("Node '%s' reg property is not an int" %
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node.name)
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if not isinstance(reg.value, list):
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reg.value = [reg.value]
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if len(reg.value) % total:
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raise ValueError(
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"Node '%s' (parent '%s') reg property has %d cells "
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'which is not a multiple of na + ns = %d + %d)' %
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(node.name, node.parent.name, len(reg.value), num_addr,
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num_size))
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reg.num_addr = num_addr
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reg.num_size = num_size
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if num_addr > 1 or num_size > 1:
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reg.type = fdt.Type.INT64
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i = 0
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new_value = []
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val = reg.value
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while i < len(val):
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addr = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_addr)
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i += num_addr
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size = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_size)
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i += num_size
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new_value += [addr, size]
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reg.value = new_value
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def scan_structs(self):
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"""Scan the device tree building up the C structures we will use.
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|
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.
|
|
|
|
The results are written to self._struct_data
|
|
"""
|
|
structs = self._struct_data
|
|
for node in self._valid_nodes:
|
|
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 struct_name before, update the existing struct
|
|
if node.struct_name in structs:
|
|
struct = structs[node.struct_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.struct_name] = fields
|
|
|
|
for node in self._valid_nodes:
|
|
struct = structs[node.struct_name]
|
|
for name, prop in node.props.items():
|
|
if name not in PROP_IGNORE_LIST and name[0] != '#':
|
|
prop.Widen(struct[name])
|
|
|
|
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):
|
|
"""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.
|
|
"""
|
|
structs = self._struct_data
|
|
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, node):
|
|
"""Add a device declaration to the output
|
|
|
|
This declares a U_BOOT_DRVINFO() for the device being processed
|
|
|
|
Args:
|
|
node: Node to process
|
|
"""
|
|
self.buf('U_BOOT_DRVINFO(%s) = {\n' % node.var_name)
|
|
self.buf('\t.name\t\t= "%s",\n' % node.struct_name)
|
|
self.buf('\t.plat\t\t= &%s%s,\n' % (VAL_PREFIX, node.var_name))
|
|
self.buf('\t.plat_size\t= sizeof(%s%s),\n' %
|
|
(VAL_PREFIX, node.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 prep_priv(self, struc, name, suffix, section='.priv_data'):
|
|
if not struc:
|
|
return None
|
|
var_name = '_%s%s' % (name, suffix)
|
|
hdr = self._scan._structs.get(struc)
|
|
if hdr:
|
|
self.buf('#include <%s>\n' % hdr.fname)
|
|
else:
|
|
print('Warning: Cannot find header file for struct %s' % struc)
|
|
attr = '__attribute__ ((section ("%s")))' % section
|
|
return var_name, struc, attr
|
|
|
|
def alloc_priv(self, info, name, extra, suffix='_priv'):
|
|
result = self.prep_priv(info, name, suffix)
|
|
if not result:
|
|
return None
|
|
var_name, struc, section = result
|
|
self.buf('u8 %s_%s[sizeof(struct %s)]\n\t%s;\n' %
|
|
(var_name, extra, struc.strip(), section))
|
|
return '%s_%s' % (var_name, extra)
|
|
|
|
def alloc_plat(self, info, name, extra, node):
|
|
result = self.prep_priv(info, name, '_plat')
|
|
if not result:
|
|
return None
|
|
var_name, struc, section = result
|
|
self.buf('struct %s %s\n\t%s_%s = {\n' %
|
|
(struc.strip(), section, var_name, extra))
|
|
self.buf('\t.dtplat = {\n')
|
|
for pname in sorted(node.props):
|
|
self._output_prop(node, node.props[pname], 2)
|
|
self.buf('\t},\n')
|
|
self.buf('};\n')
|
|
return '&%s_%s' % (var_name, extra)
|
|
|
|
def _declare_device_inst(self, node, parent_driver):
|
|
"""Add a device instance declaration to the output
|
|
|
|
This declares a DM_DEVICE_INST() for the device being processed
|
|
|
|
Args:
|
|
node: Node to output
|
|
"""
|
|
driver = node.driver
|
|
uclass = node.uclass
|
|
self.buf('\n')
|
|
num_lines = len(self._lines)
|
|
plat_name = self.alloc_plat(driver.plat, driver.name, node.var_name,
|
|
node)
|
|
priv_name = self.alloc_priv(driver.priv, driver.name, node.var_name)
|
|
parent_plat_name = None
|
|
parent_priv_name = None
|
|
if parent_driver:
|
|
# TODO: deal with uclass providing these values
|
|
parent_plat_name = self.alloc_priv(
|
|
parent_driver.child_plat, driver.name, node.var_name,
|
|
'_parent_plat')
|
|
parent_priv_name = self.alloc_priv(
|
|
parent_driver.child_priv, driver.name, node.var_name,
|
|
'_parent_priv')
|
|
uclass_plat_name = self.alloc_priv(
|
|
uclass.per_dev_plat, driver.name + '_uc', node.var_name, 'plat')
|
|
uclass_priv_name = self.alloc_priv(uclass.per_dev_priv,
|
|
driver.name + '_uc', node.var_name)
|
|
for hdr in driver.headers:
|
|
self.buf('#include %s\n' % hdr)
|
|
|
|
# Add a blank line if we emitted any stuff above, for readability
|
|
if num_lines != len(self._lines):
|
|
self.buf('\n')
|
|
|
|
self.buf('DM_DEVICE_INST(%s) = {\n' % node.var_name)
|
|
self.buf('\t.driver\t\t= DM_DRIVER_REF(%s),\n' % node.struct_name)
|
|
self.buf('\t.name\t\t= "%s",\n' % node.struct_name)
|
|
if plat_name:
|
|
self.buf('\t.plat_\t\t= %s,\n' % plat_name)
|
|
else:
|
|
self.buf('\t.plat_\t\t= &%s%s,\n' % (VAL_PREFIX, node.var_name))
|
|
if parent_plat_name:
|
|
self.buf('\t.parent_plat_\t= %s,\n' % parent_plat_name)
|
|
if uclass_plat_name:
|
|
self.buf('\t.uclass_plat_\t= %s,\n' % uclass_plat_name)
|
|
driver_date = None
|
|
|
|
if node != self._fdt.GetRoot():
|
|
compat_list = node.props['compatible'].value
|
|
if not isinstance(compat_list, list):
|
|
compat_list = [compat_list]
|
|
for compat in compat_list:
|
|
driver_data = driver.compat.get(compat)
|
|
if driver_data:
|
|
self.buf('\t.driver_data\t= %s,\n' % driver_data)
|
|
break
|
|
|
|
if node.parent and node.parent.parent:
|
|
if node.parent not in self._valid_nodes:
|
|
# This might indicate that the parent node is not in the
|
|
# SPL/TPL devicetree but the child is. For example if we are
|
|
# dealing with of-platdata in TPL, the parent has a
|
|
# u-boot,dm-tpl tag but the child has u-boot,dm-pre-reloc. In
|
|
# this case the child node exists in TPL but the parent does
|
|
# not.
|
|
raise ValueError("Node '%s' requires parent node '%s' but it is not in the valid list" %
|
|
(node.path, node.parent.path))
|
|
self.buf('\t.parent\t\t= DM_DEVICE_REF(%s),\n' %
|
|
node.parent.var_name)
|
|
if priv_name:
|
|
self.buf('\t.priv_\t\t= %s,\n' % priv_name)
|
|
self.buf('\t.uclass\t\t= DM_UCLASS_REF(%s),\n' % uclass.name)
|
|
|
|
if uclass_priv_name:
|
|
self.buf('\t.uclass_priv_ = %s,\n' % uclass_priv_name)
|
|
if parent_priv_name:
|
|
self.buf('\t.parent_priv_\t= %s,\n' % parent_priv_name)
|
|
self.list_node('uclass_node', uclass.node_refs, node.uclass_seq)
|
|
self.list_head('child_head', 'sibling_node', node.child_devs, node.var_name)
|
|
if node.parent in self._valid_nodes:
|
|
self.list_node('sibling_node', node.parent.child_refs,
|
|
node.parent_seq)
|
|
# flags is left as 0
|
|
|
|
self.buf('\t.seq_ = %d,\n' % node.seq)
|
|
|
|
self.buf('};\n')
|
|
self.buf('\n')
|
|
return parent_plat_name
|
|
|
|
def _output_prop(self, node, prop, tabs=1):
|
|
"""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('%s%s= ' % ('\t' * tabs, 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, node):
|
|
"""Output the definition of a device's struct values
|
|
|
|
Args:
|
|
node (Node): Node to output
|
|
"""
|
|
self.buf('static struct %s%s %s%s = {\n' %
|
|
(STRUCT_PREFIX, node.struct_name, VAL_PREFIX, node.var_name))
|
|
for pname in sorted(node.props):
|
|
self._output_prop(node, node.props[pname])
|
|
self.buf('};\n')
|
|
|
|
def list_head(self, head_member, node_member, node_refs, var_name):
|
|
self.buf('\t.%s\t= {\n' % head_member)
|
|
if node_refs:
|
|
last = node_refs[-1].dev_ref
|
|
first = node_refs[0].dev_ref
|
|
member = node_member
|
|
else:
|
|
last = 'DM_DEVICE_REF(%s)' % var_name
|
|
first = last
|
|
member = head_member
|
|
self.buf('\t\t.prev = &%s->%s,\n' % (last, member))
|
|
self.buf('\t\t.next = &%s->%s,\n' % (first, member))
|
|
self.buf('\t},\n')
|
|
|
|
def list_node(self, member, node_refs, seq):
|
|
self.buf('\t.%s\t= {\n' % member)
|
|
self.buf('\t\t.prev = %s,\n' % node_refs[seq - 1])
|
|
self.buf('\t\t.next = %s,\n' % node_refs[seq + 1])
|
|
self.buf('\t},\n')
|
|
|
|
def generate_uclasses(self):
|
|
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')
|
|
self.buf('/*\n')
|
|
self.buf(
|
|
" * uclass declarations, ordered by 'struct uclass' linker_list idx:\n")
|
|
uclass_list = self._valid_uclasses
|
|
for seq, uclass in enumerate(uclass_list):
|
|
self.buf(' * %3d: %s\n' % (seq, uclass.name))
|
|
self.buf(' *\n')
|
|
self.buf(' * Sequence numbers allocated in each uclass:\n')
|
|
for uclass in uclass_list:
|
|
if uclass.alias_num_to_node:
|
|
self.buf(' * %s: %s\n' % (uclass.name, uclass.uclass_id))
|
|
for seq, node in uclass.alias_num_to_node.items():
|
|
self.buf(' * %d: %s\n' % (seq, node.path))
|
|
self.buf(' */\n')
|
|
|
|
uclass_node = {}
|
|
for seq, uclass in enumerate(uclass_list):
|
|
uclass_node[seq] = ('&DM_UCLASS_REF(%s)->sibling_node' %
|
|
uclass.name)
|
|
uclass_node[-1] = '&uclass_head'
|
|
uclass_node[len(uclass_list)] = '&uclass_head'
|
|
self.buf('\n')
|
|
self.buf('struct list_head %s = {\n' % 'uclass_head')
|
|
self.buf('\t.prev = %s,\n' % uclass_node[len(uclass_list) -1])
|
|
self.buf('\t.next = %s,\n' % uclass_node[0])
|
|
self.buf('};\n')
|
|
self.buf('\n')
|
|
|
|
for seq, uclass in enumerate(uclass_list):
|
|
uc_drv = self._scan._uclass.get(uclass.uclass_id)
|
|
|
|
priv_name = self.alloc_priv(uc_drv.priv, uc_drv.name, '')
|
|
|
|
self.buf('DM_UCLASS_INST(%s) = {\n' % uclass.name)
|
|
if priv_name:
|
|
self.buf('\t.priv_\t\t= %s,\n' % priv_name)
|
|
self.buf('\t.uc_drv\t\t= DM_UCLASS_DRIVER_REF(%s),\n' % uclass.name)
|
|
self.list_node('sibling_node', uclass_node, seq)
|
|
self.list_head('dev_head', 'uclass_node', uc_drv.devs, None)
|
|
self.buf('};\n')
|
|
self.buf('\n')
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def read_aliases(self):
|
|
"""Read the aliases and attach the information to self._alias
|
|
|
|
Raises:
|
|
ValueError: The alias path is not found
|
|
"""
|
|
alias_node = self._fdt.GetNode('/aliases')
|
|
if not alias_node:
|
|
return
|
|
re_num = re.compile('(^[a-z0-9-]+[a-z]+)([0-9]+)$')
|
|
for prop in alias_node.props.values():
|
|
m_alias = re_num.match(prop.name)
|
|
if not m_alias:
|
|
raise ValueError("Cannot decode alias '%s'" % prop.name)
|
|
name, num = m_alias.groups()
|
|
node = self._fdt.GetNode(prop.value)
|
|
result = self._scan.add_uclass_alias(name, num, node)
|
|
if result is None:
|
|
raise ValueError("Alias '%s' path '%s' not found" %
|
|
(prop.name, prop.value))
|
|
elif result is False:
|
|
print("Could not find uclass for alias '%s'" % prop.name)
|
|
|
|
def generate_decl(self):
|
|
nodes_to_output = list(self._valid_nodes)
|
|
|
|
self.buf('#include <dm/device-internal.h>\n')
|
|
self.buf('#include <dm/uclass-internal.h>\n')
|
|
self.buf('\n')
|
|
self.buf(
|
|
'/* driver declarations - these allow DM_DRIVER_GET() to be used */\n')
|
|
for node in nodes_to_output:
|
|
self.buf('extern U_BOOT_DRIVER(%s);\n' % node.struct_name);
|
|
self.buf('\n')
|
|
|
|
if self._instantiate:
|
|
self.buf(
|
|
'/* device declarations - these allow DM_DEVICE_REF() to be used */\n')
|
|
for node in nodes_to_output:
|
|
self.buf('extern DM_DEVICE_INST(%s);\n' % node.var_name)
|
|
self.buf('\n')
|
|
|
|
uclass_list = self._valid_uclasses
|
|
|
|
self.buf(
|
|
'/* uclass driver declarations - needed for DM_UCLASS_DRIVER_REF() */\n')
|
|
for uclass in uclass_list:
|
|
self.buf('extern UCLASS_DRIVER(%s);\n' % uclass.name)
|
|
|
|
if self._instantiate:
|
|
self.buf('\n')
|
|
self.buf('/* uclass declarations - needed for DM_UCLASS_REF() */\n')
|
|
for uclass in uclass_list:
|
|
self.buf('extern DM_UCLASS_INST(%s);\n' % uclass.name)
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def assign_seqs(self):
|
|
"""Assign a sequence number to each node"""
|
|
for node in self._valid_nodes_unsorted:
|
|
seq = self._scan.assign_seq(node)
|
|
if seq is not None:
|
|
node.seq = seq
|
|
|
|
def process_nodes(self, need_drivers):
|
|
nodes_to_output = list(self._valid_nodes)
|
|
|
|
# Figure out which drivers we actually use
|
|
self._scan.mark_used(nodes_to_output)
|
|
|
|
for node in nodes_to_output:
|
|
node.dev_ref = 'DM_DEVICE_REF(%s)' % node.var_name
|
|
driver = self._scan.get_driver(node.struct_name)
|
|
if not driver:
|
|
if not need_drivers:
|
|
continue
|
|
raise ValueError("Cannot parse/find driver for '%s'" %
|
|
node.struct_name)
|
|
node.driver = driver
|
|
uclass = self._scan._uclass.get(driver.uclass_id)
|
|
if not uclass:
|
|
raise ValueError("Cannot parse/find uclass '%s' for driver '%s'" %
|
|
(driver.uclass_id, node.struct_name))
|
|
node.uclass = uclass
|
|
node.uclass_seq = len(node.uclass.devs)
|
|
node.uclass.devs.append(node)
|
|
uclass.node_refs[node.uclass_seq] = \
|
|
'&%s->uclass_node' % node.dev_ref
|
|
|
|
parent_driver = None
|
|
if node.parent in self._valid_nodes:
|
|
parent_driver = self._scan.get_driver(node.parent.struct_name)
|
|
if not parent_driver:
|
|
if not need_drivers:
|
|
continue
|
|
raise ValueError(
|
|
"Cannot parse/find parent driver '%s' for '%s'" %
|
|
(node.parent.struct_name, node.struct_name))
|
|
node.parent_seq = len(node.parent.child_devs)
|
|
node.parent.child_devs.append(node)
|
|
node.parent.child_refs[node.parent_seq] = \
|
|
'&%s->sibling_node' % node.dev_ref
|
|
node.parent_driver = parent_driver
|
|
|
|
for node in nodes_to_output:
|
|
ref = '&%s->child_head' % node.dev_ref
|
|
node.child_refs[-1] = ref
|
|
node.child_refs[len(node.child_devs)] = ref
|
|
|
|
uclass_set = set()
|
|
for driver in self._scan._drivers.values():
|
|
if driver.used and driver.uclass:
|
|
uclass_set.add(driver.uclass)
|
|
self._valid_uclasses = sorted(list(uclass_set),
|
|
key=lambda uc: uc.uclass_id)
|
|
|
|
for seq, uclass in enumerate(uclass_set):
|
|
ref = '&DM_UCLASS_REF(%s)->dev_head' % uclass.name
|
|
uclass.node_refs[-1] = ref
|
|
uclass.node_refs[len(uclass.devs)] = ref
|
|
|
|
def output_node_plat(self, node):
|
|
"""Output the C code for a node
|
|
|
|
Args:
|
|
node (fdt.Node): node to output
|
|
"""
|
|
driver = node.driver
|
|
parent_driver = node.parent_driver
|
|
|
|
line1 = 'Node %s index %d' % (node.path, node.idx)
|
|
if driver:
|
|
self.buf('/*\n')
|
|
self.buf(' * %s\n' % line1)
|
|
self.buf(' * driver %s parent %s\n' % (driver.name,
|
|
parent_driver.name if parent_driver else 'None'))
|
|
self.buf(' */\n')
|
|
else:
|
|
self.buf('/* %s */\n' % line1)
|
|
|
|
self._output_values(node)
|
|
self._declare_device(node)
|
|
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def output_node_instance(self, node):
|
|
"""Output the C code for a node
|
|
|
|
Args:
|
|
node (fdt.Node): node to output
|
|
"""
|
|
parent_driver = node.parent_driver
|
|
|
|
self.buf('/*\n')
|
|
self.buf(' * Node %s index %d\n' % (node.path, node.idx))
|
|
self.buf(' * driver %s parent %s\n' % (node.driver.name,
|
|
parent_driver.name if parent_driver else 'None'))
|
|
self.buf('*/\n')
|
|
|
|
if not node.driver.plat:
|
|
self._output_values(node)
|
|
self._declare_device_inst(node, parent_driver)
|
|
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def generate_plat(self):
|
|
"""Generate device defintions for the platform data
|
|
|
|
This writes out C platform data initialisation data and
|
|
U_BOOT_DRVINFO() 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('/* Allow use of U_BOOT_DRVINFO() in this file */\n')
|
|
self.out('#define DT_PLAT_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')
|
|
|
|
if self._valid_nodes:
|
|
self.out('/*\n')
|
|
self.out(
|
|
" * driver_info declarations, ordered by 'struct driver_info' linker_list idx:\n")
|
|
self.out(' *\n')
|
|
self.out(' * idx %-20s %-s\n' % ('driver_info', 'driver'))
|
|
self.out(' * --- %-20s %-s\n' % ('-' * 20, '-' * 20))
|
|
for node in self._valid_nodes:
|
|
self.out(' * %3d: %-20s %-s\n' %
|
|
(node.idx, node.var_name, node.struct_name))
|
|
self.out(' * --- %-20s %-s\n' % ('-' * 20, '-' * 20))
|
|
self.out(' */\n')
|
|
self.out('\n')
|
|
|
|
for node in self._valid_nodes:
|
|
self.output_node_plat(node)
|
|
|
|
self.out(''.join(self.get_buf()))
|
|
|
|
def generate_device(self):
|
|
"""Generate device instances
|
|
|
|
This writes out DM_DEVICE_INST() records for each device in the
|
|
build.
|
|
|
|
See the documentation in doc/driver-model/of-plat.rst for more
|
|
information.
|
|
"""
|
|
self.out('#include <common.h>\n')
|
|
self.out('#include <dm.h>\n')
|
|
self.out('#include <dt-structs.h>\n')
|
|
self.out('\n')
|
|
|
|
if self._valid_nodes:
|
|
self.out('/*\n')
|
|
self.out(
|
|
" * udevice declarations, ordered by 'struct udevice' linker_list position:\n")
|
|
self.out(' *\n')
|
|
self.out(' * idx %-20s %-s\n' % ('udevice', 'driver'))
|
|
self.out(' * --- %-20s %-s\n' % ('-' * 20, '-' * 20))
|
|
for node in self._valid_nodes:
|
|
self.out(' * %3d: %-20s %-s\n' %
|
|
(node.idx, node.var_name, node.struct_name))
|
|
self.out(' * --- %-20s %-s\n' % ('-' * 20, '-' * 20))
|
|
self.out(' */\n')
|
|
self.out('\n')
|
|
|
|
for node in self._valid_nodes:
|
|
self.output_node_instance(node)
|
|
|
|
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_COMMON = {
|
|
'decl':
|
|
OutputFile(Ftype.HEADER, 'dt-decl.h', DtbPlatdata.generate_decl,
|
|
'Declares externs for all device/uclass instances'),
|
|
'struct':
|
|
OutputFile(Ftype.HEADER, 'dt-structs-gen.h',
|
|
DtbPlatdata.generate_structs,
|
|
'Defines the structs used to hold devicetree data'),
|
|
}
|
|
|
|
# File generated without instantiate
|
|
OUTPUT_FILES_NOINST = {
|
|
'platdata':
|
|
OutputFile(Ftype.SOURCE, 'dt-plat.c', DtbPlatdata.generate_plat,
|
|
'Declares the U_BOOT_DRIVER() records and platform data'),
|
|
}
|
|
|
|
# File generated with instantiate
|
|
OUTPUT_FILES_INST = {
|
|
'device':
|
|
OutputFile(Ftype.SOURCE, 'dt-device.c', DtbPlatdata.generate_device,
|
|
'Declares the DM_DEVICE_INST() records'),
|
|
'uclass':
|
|
OutputFile(Ftype.SOURCE, 'dt-uclass.c', DtbPlatdata.generate_uclasses,
|
|
'Declares the uclass instances (struct uclass)'),
|
|
}
|
|
|
|
|
|
def run_steps(args, dtb_file, include_disabled, output, output_dirs, phase,
|
|
instantiate, warning_disabled=False, drivers_additional=None,
|
|
basedir=None, scan=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
|
|
phase: The phase of U-Boot that we are generating data for, e.g. 'spl'
|
|
or 'tpl'. None if not known
|
|
instantiate: Instantiate devices so they don't need to be bound at
|
|
run-time
|
|
warning_disabled (bool): True to avoid showing warnings about missing
|
|
drivers
|
|
drivers_additional (list): List of additional drivers to use during
|
|
scanning
|
|
basedir (str): Base directory of U-Boot source code. Defaults to the
|
|
grandparent of this file's directory
|
|
scan (src_src.Scanner): Scanner from a previous run. This can help speed
|
|
up tests. Use None for normal operation
|
|
|
|
Returns:
|
|
DtbPlatdata object
|
|
|
|
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')
|
|
|
|
if not scan:
|
|
scan = src_scan.Scanner(basedir, drivers_additional, phase)
|
|
scan.scan_drivers()
|
|
do_process = True
|
|
else:
|
|
do_process = False
|
|
plat = DtbPlatdata(scan, dtb_file, include_disabled, instantiate)
|
|
plat.scan_dtb()
|
|
plat.scan_tree(add_root=instantiate)
|
|
plat.prepare_nodes()
|
|
plat.scan_reg_sizes()
|
|
plat.setup_output_dirs(output_dirs)
|
|
plat.scan_structs()
|
|
plat.scan_phandles()
|
|
plat.process_nodes(instantiate)
|
|
plat.read_aliases()
|
|
plat.assign_seqs()
|
|
|
|
# Figure out what output files we plan to generate
|
|
output_files = dict(OUTPUT_FILES_COMMON)
|
|
if instantiate:
|
|
output_files.update(OUTPUT_FILES_INST)
|
|
else:
|
|
output_files.update(OUTPUT_FILES_NOINST)
|
|
|
|
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)
|
|
plat.out_header(outfile)
|
|
outfile.method(plat)
|
|
plat.finish_output()
|
|
|
|
if not warning_disabled:
|
|
scan.show_warnings()
|
|
return plat
|